JPH0771038B2 - Maintenance monitoring system in mobile communication - Google Patents

Description

Description: (1) Technical Field to which the Invention belongs The present invention relates to mobile communication using a small zone configuration, in which an incoming / outgoing call with a mobile terminal is always secured from any location within a service area and communication is in progress. The present invention relates to a communication method and system for satisfying the communication quality when the communication quality of the mobile terminal deteriorates due to the movement of the mobile terminal. More specifically, the effective frequency utilization rate, the communication quality, the control capability of the wireless line, The present invention relates to a communication system excellent in maintenance and monitoring ability.

(2) Conventional technology and its problems Generally, when mobile communication is performed in a wide service area, one radio base station covers the entire area and communicates with mobiles in the service area. Is called the large zone method. On the other hand, the small zone method means that the service area is divided into a plurality of small areas, one radio base station is installed in each of the divided areas, and a mobile radio device in each area. Communicates with these radio base stations.

The conventional small zone method is, for example, NT which is currently in commercial service.
It has been adopted in T's car telephone system [Reference Yoshikawa et al. "Car phone radio line control", Research and Practical Report Vol.26, No.7, 1885, Nippon Telegraph and Telephone Public Corporation, Telecommunications Research Laboratories].

First, as a method of processing an incoming call to a mobile station that moves anywhere in the service area, a method of calling all at once in a mobile station location area that is known in advance is used.

Location registration is performed by notifying the mobile telephone exchange of the location of the mobile device. A signal relating to position information for position registration is transmitted to the incoming call control channel on which the mobile station waits, and this signal is made different for each paging area. When the mobile device detects that the position information signal has changed, the position registration is performed by automatically transmitting the position registration signal.

The next time the mobile station makes a call, it uses the outgoing control channel available in the control zone in which the mobile station is located. In this case, the number of the outgoing call control channel is always detected by the incoming call control channel, so the mobile device stores this number and uses the blank channel (empty line control method) among them. On the base station side, as described above, the radio waves from the mobile device are received by multiple radio base stations, and as a result, the radio zone in which the mobile device is located is identified (position detection), and an empty call channel that can be used in that radio zone. By specifying, the call can be made.

Further, the incoming call will be described. The mobile station is listening on the incoming control channel. When the mobile unit moves to another control zone, it is necessary to switch to the incoming control channel used in the new control zone. Therefore, if the reception level of the incoming control channel drops below the required value,
It has a function of selectively capturing channels received at a required level or higher from a plurality of channels assigned for controlling incoming calls, and the mobile device identifies the control zone.

Therefore, when an incoming call arrives from a fixed telephone network to a mobile station, it is desirable if the mobile telephone switching center makes a simultaneous call from all the wireless base stations in the control zone (s) where the location is registered. Will be called.

The above is an outline of a practical system, but if the system as described below is constructed, various problems will occur.

In order to increase the number of subscribers (the number of mobile phones) accommodated in the system by one digit or more from the conventional system to 100,000 to several million, the zone radius must be reduced by one digit or more. In this case, if the wireless line control is centrally managed as described above, ultra-high-speed control is not possible due to congestion of control traffic due to the generation of many control signals and the absolute delay time that occurs in signal transmission from the wireless base station to the wireless line control station. Becomes

Make it usable not only inside the car but also outside the car by people. This is the first step to realize the ultimate telephone system, "anytime, anywhere, anywhere", but for this purpose it is necessary to downsize the mobile radio.

In order to improve usability, for example, it is necessary to lengthen the charging cycle of the battery. For this reason, it is necessary to reduce the output of the wireless transmitter (from 5W to 10mW) and to save power.

It is necessary to maximize the utilization efficiency of the used frequency.
This is a major premise for realizing a system capable of accommodating subscribers having a large capacity of several millions.

As one system proposal (trial plan) satisfying such requirements, the present inventors have already proposed [Reference. Ito "Study on Cellular Phone Systems-Focusing on Wireless Network Control and Routing-" IEICE Technical Report CS87-16
May 1987].

According to this proposal, the following conditions are provided.

The number of subscribers accommodated in the system can cover all the people of Japan.

It can be realized in a size that can be carried by a person.

It can be as compact and lightweight as a cordless phone. However, the transmission power is about 10 mw.

Assuming a radius of about 25 m as the size of the wireless zone, a required frequency portable range of 2 to 3 MHz is sufficient.

Control is decentralized such that each mobile phone takes the initiative in system control.

The wireless transmission / reception capability required by the mobile phone parent device is 1
A set of transceivers or one radio channel is sufficient.

In addition to having multi-channel access capability, the transmitter / receiver in section has a wireless line control capability, that is, control channel use capability and a wireless line communication capability, that is, call channel use capability.

Further, regarding the location registration of the mobile phone, which is a problem in the system adopting the minimum zone method with the radius of 25 m as described above, it is proposed in the following document.

[Reference Ito "Study on mobile phone system-Proposal of multiple location registration and its application to system operation-Technical report of IEICE RCS88 September 1988"] Using this proposal, the following problems can be solved. is what happened.

In a small zone system that uses a small zone (micro cell) with a radius of 25 to 100 m, the service area per wireless base station is extremely narrow and the distance between the transmitting antenna and the receiving antenna is short, so the area that follows the short-range radio wave propagation characteristics And has a complicated appearance due to the influence of topography and features. In such a service area, if location registration is performed by a mobile unit, a large number of radio base stations can receive signals from mobile radio devices, making it difficult to determine in which area they are located. , Decided to register the location of multiple wireless base stations that received signals well. As a result, making and receiving calls became easier.

The use of control signals for location registration is reduced and radio interference is reduced.

It became easier to switch zones when moving during a call.

It is easy to take countermeasures against call congestion, and call loss is reduced.

Transmit and receive diversity can be easily applied,
It is possible to use it for improving the call quality.

Although the above advantages have been clarified, no concrete system proposal that satisfies the above matters has been made yet.

However, with regard to the above, a large number of wireless base stations shall be installed in a service area with high call traffic density to overlap the serviceable areas of the wireless base stations, and the call processing of these wireless base stations should be performed by one wireless base station. Proposals have been reported for hibernating other than running. However, in the above method, the wireless base station capable of performing call processing performs the outgoing call processing with respect to the call from one mobile phone, confirms that the call is started, and then the other wireless base stations in the vicinity are not connected. Since call processing is possible, a transition time is required, and if there is a call from a mobile phone during this time, there is a drawback that the call cannot be answered immediately.

Further, the system concept for performing maintenance / monitoring of the mobile communication system using the microcell as described above has not been clarified, and most of the disclosed hardware and software technologies cannot be found. The current situation.

If the conventional technology constitutes a maintenance / monitoring system, the center that manages the system will perform maintenance / monitoring. A system in practical use is the maintenance and monitoring system for NTT's car phones, which is used for maintenance and monitoring of 30 to 40 wireless base stations deployed in Tokyo's 23 wards and mobile radios in their service areas. The wireless network control station installed at one location is monitoring all at once.

However, with respect to the maintenance and monitoring of the mobile communication system using the microcell as in the present invention, the following problems occur as compared with the above system.

The radio base station for car phones is installed in a building with a structure such as a telephone station or a radio relay station, occupying a considerable space, and the service area is wide with a radius of 3 to 5 km and the number of radio channels used is large. In some cases, workers are always stationed for maintenance and inspection. On the other hand, in the system adopting the microcell structure as in the present invention, the fixed radio station having the same operation as the radio base station is small in size and weight and small enough to be carried by one person, and , The number of service areas
Since it is as small as 10m, it will be installed on the ceiling or attic inside the building and on the reception pole outdoors. In this case, it is not a good idea to perform maintenance monitoring of the fixed wireless stations themselves, and remote monitoring is performed at a maintenance monitoring center connected by a transmission line, but this is also inconvenient in various respects. . For example, in order to check the operation of a fixed wireless station when a call is made from the nearest mobile phone, a portable maintenance that has the function of the mobile phone and enables wireless access to the fixed wireless device is provided. The monitoring console makes it convenient and economical.

The number of radio base stations in car phones is, for example, about 30 to 40 in Tokyo's 23 wards. With this number, equipment maintenance monitoring can be economically performed by remote monitoring at the center and patrol maintenance. . However, in the system to which the micro cell is applied such as the present invention, the system itself has various high efficiencies of frequency utilization, and the mobile phone has various merits such as low power consumption and improved usability. If you apply the car phone method as it is,
It is uneconomical and inconvenient. In other words, in this case, the number of fixed wireless stations installed is 3 even in Tokyo's 23 wards if the wireless transmission power is 10 mW
Approximately 50,000 is expected, and if the installation location is above the ceiling and the ceiling plate is removed one by one to maintain and inspect the radio equipment of the fixed radio station, it will bother the occupants. There will be many. Therefore, from this point of view, it is desired to have a system configuration in which the fixed wireless station is operated wirelessly in the vicinity of the fixed wireless station to easily perform a test that is difficult to perform at the center.

(3) Object of the Invention An object of the present invention is to provide a service having a high frequency utilization rate, capable of accommodating a subscriber having a large capacity, and high call traffic density as a mobile communication system using a microcell based on the above-mentioned conventional techniques. An object of the present invention is to provide a maintenance and monitoring system in mobile communication, which can build a system with high serviceability that enables a large number of call processes smoothly even in an area.

(4) Structure and operation of the invention Fig. 1 shows the invention in a large-scale high-rise building B3 (3rd basement floor) to 21F.
This is an embodiment when applied to a system having a service area within (21 floors above ground).

In the figure, a switching device PBX has an interface function with a public line CO and a radio controller which is a main component of the system of the present invention.

The system of the present invention is a wireless control device (wireless control device RC
E), fixed wireless station (fixed wireless station FRS), mobile phone (mobile phone PTEL) and portable maintenance monitoring device (type I) or the same (type II), from anywhere in the service area, anytime, anywhere It will realize a service that can be called to.

However, the above-mentioned service contents are between mobile phones PTEL,
It can be performed between the mobile telephone PTEL and the fixed telephone FTEL in the building, and also between the mobile telephone and the telephone installed on the outside line (far from the private branch exchange).

The features of the present invention are as described above, but the center of judgments such as position registration of a mobile phone and at the time of an incoming / outgoing call operation is not fixed at the center of a wireless system control device like a conventional system but at a fixed wireless station or By having the terminal in the terminal, the load on the central wireless system control device is lightened, the work speed is increased, and by doing so, it is possible to easily cope with the addition of terminals and the expansion of the system.

In addition, when using a wireless channel for transmitting and receiving control signals used for making and receiving calls when registering the location of a mobile phone, in order to make effective use of frequencies and improve quality at the time of signal transmission, the The wireless channel was set individually, and the optimal design as a wireless system was possible.

Furthermore, in order to keep the usage status of this system always good, not only the maintenance operation console included in the wireless control device but also the portable maintenance monitoring device (I type) or the same (II type) monitors the operation information of all systems. It became possible and it became possible to operate effectively in maintenance operation.

Hereinafter, each component used in the configuration of the present invention shown in FIG. 1 will be described in detail.

(I) Mobile phone (PTEL) This is a device that people carry around, and it must have excellent portability, operability, and maintainability. Wireless fixed radio station (FRS)
It has a function to access the radio system controller RCE via the and automatically register the location. In addition, if there is a need to register the location with another fixed wireless station due to the movement of the place as a person walks, the radio system controller RC is operated by the same operation as above.
It has a function to access E and change location registration. Incoming and outgoing call operations are possible from anywhere within the service area. In addition, when it is necessary to change (zone switch) the fixed wireless station FRS that is communicating while walking while talking, it may not be possible with the conventional system or it may have a bad effect such as temporarily disconnecting the call information. However, according to the present invention, as will be described later, a system without these adverse effects is possible.

Fig. 2 shows the hardware configuration of the mobile phone PTEL.

In FIG. 2, the radio signal transmitted from the fixed radio station FRS is received by the receiving antenna.

This received signal is divided into two by the shared device and input to the receivers I and II, respectively. In the receiver I, the signal is amplified to the required level and then demodulated, and part of it is sent to the control unit CPU (200
control signal of bps), the other output is divided into two, one of which is input to the receiver through the switch SW ₁ and the other is input to the control unit CPU after passing through the decoder (control signal of 2400 bps). The control unit CPU is roughly divided into a line control unit and a maintenance monitoring control unit, and has an interface with a portable maintenance monitoring console I type through a storage unit, a switch, a keyboard, and terminals.
Each has the function indicated by the name.

Next, the signal input to the receiver II also has the same wiring configuration as the receiver I as shown in FIG. The switches SW ₁ and SW ₂ are driven by the control of the control unit CPU via the switch drive unit. That is, in synchronism with the switch SW ₁ being turned to or so that the voice signal of either the receiver I or II is input to the receiver, the switch SW ₃ causes the receiver I or II to move.
The control signal obtained at the output of is selected and input to the decoder.

Similarly, switch SW ₂ determines which receiver I or II will be used in conjunction with the transmitter. Further, the synthesizer I or II receives a command signal for a wireless channel to be generated from the control unit CPU to generate a local oscillation output of a desired frequency, and the receiver I or II
II and transmitter. An electric field strength measurement output is supplied from the receiver I or II to the control unit CPU. This is used when switching the zone of the mobile phone PTEL described later.

Three inputs are added to the transmitter. One is a transmitter output, and the other is a control signal from the control unit CPU and a high-speed signal 2400 bps that has passed through the encoder from the control unit CPU. These are converted by a transmitter into a radio signal by modulation, added to a transmission antenna, and transmitted to a radio base station.

The control unit CPU shown in FIG. 2 has a built-in timer unit (not shown), which stops radio wave emission as will be described later, receives a signal transmitted from the fixed radio station FRS at a fixed timing, or Provides timing determination information regarding when reception is stopped.

Finally, the maintenance monitoring function of the mobile phone PTEL will be described.

The maintenance monitoring function in the mobile phone PTEL is
Mobile phone PTEL for the purpose of EL operation monitoring and operation test
Terminal monitor (PC) directly connected by the maintenance monitoring control program residing inside and serial interface RS232c that can be connected to PTEL and general-purpose computer
And realize it.

The maintenance monitoring connection program inside the mobile phone PTEL takes a passive control form and performs the following processing according to the request of the form maintenance monitoring console type I or type II.

Online writing of data Online reading of data Data dump Reading and writing of data in the storage section The terminal console activates the maintenance monitoring control program inside the mobile phone PTEL and reads the necessary data while the mobile phone PTEL is operating normally. Real-time monitoring of operation information is possible by performing analysis display inside the console.

In addition, the necessary data is written, and the mobile phone PTEL
A part of the function was operated on a trial basis and it was possible to execute a partial evaluation test.

The reading and writing of storage data was set mainly for the purpose of registering (preset) PID and mobile phone PTEL operating conditions.

The setting of the maintenance management control program is registered and set as the lowest priority task, and is executed by using the extra time of the normal processing of the mobile phone PTEL.

The above-described maintenance and monitoring function of the mobile phone has two types, one that is performed only by itself and one that is performed by combining with a portable maintenance and monitoring console I type described later, but the former is maintenance that is closed by the mobile phone itself. It is a monitoring function, and the latter can be said to be an overall maintenance monitoring function for the entire system.

(Ii) Fixed radio station (FRS) Demodulates the digital downlink (direction from the radio system controller RCE to the mobile phone PTEL) signal from the radio system controller RCE, converts it to a radio modulated wave, and sends it to the mobile phone PTEL. .
On the other hand, an up signal from the mobile phone PTEL (direction from the mobile phone PTEL to the radio system controller RCE) is received and demodulated, converted into a digital signal, and transmitted to the radio system controller RCE.

FIG. 3 shows the hardware configuration of a fixed wireless station (fixed wireless station FRS).

In FIG. 3, the radio signal transmitted from the mobile phone PTEL is received by the receiving antenna. This received signal is divided into three parts by the shared device and input to the device receivers I, II and III. In the receiver I, the signal is amplified to a required level and then demodulated into three parts. One of them is sent to the control unit CPU via the decoder (2400bps control signal), and the other is sent to the control unit CPU via switch SW ₁₁ and the control signal of 200bps and via switch SW ₁₃ . Then, the signal is sent to the FRS / RCE interface. The control unit CPU is roughly divided into a line control unit and a maintenance monitoring control unit, and has an interface with a portable maintenance monitoring console I type through a storage unit, a switch, a keyboard, and a terminal, each having a function indicated by its name. .

The switches SW ₁₁ and SW ₁₂ are driven by the switch driver under the control of the controller CPU. That is, in the switch SW ₁₃ , the audio signal of either the receiver I or II is input to the FRS / RCE interface or in synchronization with the input signal, and in the switch SW ₁₁ , the low speed input to the control unit CPU is performed. The control signal (200bps) is selected.

Similarly, switch SW ₁₂ is a receiver I used in collaboration with the transmitter.
Or determine II. Further, the synthesizer I.II or III receives a command signal for a wireless channel to be generated by the control unit CPU and generates a local output of a desired frequency, and a receiver I,
Supply II and III and transmitter. This is used when switching the zone of the mobile phone PTEL described later. The receiver II plays the role of an interference detector, and the mobile phone PT that uses the radio channel before the radio wave is emitted from the transmitter.
Used to test whether the EL is in the vicinity and does not cause interference.

Three inputs are added to the transmitter. One is the voice signal of the other party, and the other is the control signal from the control unit CPU and the high-speed signal 2400 bps that passed through the encoder from the control unit CPU.These are converted to radio signals by modulation at the transmitter. Is added to the transmission antenna and transmitted to the mobile phone PTEL.

The control unit CPU shown in FIG. 3 has a built-in timer unit (not shown), which changes the mode of the notification signal transmitted by the fixed radio station (FRS) and radio waves at a fixed timing as described later. It provides the timing decision information regarding the stop of firing of the.

Finally, the maintenance monitoring function will be described.

The maintenance monitoring function of the fixed radio station FRS is
For the purpose of operation monitoring and operation test of the fixed wireless station FRS, a maintenance monitoring control program resident in the fixed wireless station FRS and the serial interface RS232c can be directly connected, or can be connected via a wired line to a monitoring terminal. It is realized by a portable maintenance monitoring console type I or type II, which is indirectly connected with the portable maintenance monitoring console.

The maintenance monitoring control program inside the fixed radio station FRS has the following functional items.

Maintenance monitoring function a ・ Data retrieval operation system ・ Online writing of data ・ Online reading of data ・ Data dump ・ Reading and writing of data in storage section ・ Terminal information setting function b ・ Maintenance monitoring response system (monitoring terminal is connected to a wired line・ PID location registration search function ・ Fixed wireless station FRS connection status monitoring function Self-diagnosis function a ・ Check memory section b ・ Wireless system monitoring function Monitor the following.

When an abnormality is detected, it is registered in the fault history, and in the case of a serious fault such as out-of-control, the fixed radio station FRS stops functioning. For example: -Transmission power monitoring-Synthesizer I, II, III status monitoring-Receiver I, II, III status monitoring-Wireless channel status monitoring c-Restart detection When a soft error is detected, it is registered in the failure history. If a soft error due to the same factor is detected a specified number of times, it will be regarded as a serious failure and the fixed radio station FRS will stop functioning.

Fault information notification function (when the monitoring terminal is connected to the wired line) -Fault information notification The maintenance and monitoring function is the same as that of the mobile phone PTEL.
Portable maintenance monitoring console Type I or II to fixed wireless station
Start the data retrieval operation system processing of the maintenance monitoring control program inside the FRS, read the necessary data while the fixed radio station FRS is operating normally, and perform the analysis display inside the console to check the operating status. Enables real-time monitoring.

Also, write the necessary data to the fixed radio station FRS.
It made it possible to execute a partial evaluation test by operating a part of the functions on a trial basis.

Fixed wireless station FRS
The main purpose is to register (preset) the operating conditions of.

The maintenance monitoring response system process is a process for responding to an information request for performing the maintenance monitoring at the system level, not at the terminal level through the monitoring terminal.

The setting of the maintenance monitoring function is performed by registering and setting it as the lowest task in the wired order, and using the spare time of the normal processing of the fixed wireless station FRS.

Next, the self-diagnosis function monitors the state of the fixed radio station FRS itself (especially the radio system) and registers a fault if an abnormality is detected.

The failure information notification function transmits the failure information registered in the failure history to the radio system controller RCE and the monitoring terminal (when connected to the bus) via a wired line.

There are two types of maintenance and monitoring functions of the fixed wireless station described above, one that is performed by itself and one that is combined with a portable maintenance and monitoring console type I or type II described later. The former is the fixed wireless station itself. It is a maintenance monitoring function that is closed by the latter, and the latter can be said to be a comprehensive maintenance monitoring function for the entire system.

(Iii) Radio control unit (RCE) The radio control unit (RCE) is a one-to-one correspondence with a fixed radio station (FRS) that covers the radio zone of the location of the mobile phone (PTEL) and the mobile phone PTEL. Switching equipment PBX
It is a device that connects with an extension when making / receiving a call and forms a communication path. The radio system controller RCE consists of a PCM switch communication path and is connected by a microprocessor.

A block diagram of the radio system controller RCE is shown in FIG. In FIG. 4, the location registration from the mobile phone PTEL and the fixed radio station FRS that has notified the location registration are linked and stored in the storage unit MEM. When there is an incoming call from the extension telephone FTEL of the exchange apparatus PBX, an incoming call signal including the ID of the called portable telephone PTEL is transmitted to all the fixed radio stations FRS under its control. The fixed radio station FRS that receives this receives its own storage (R
AM), and if the ID of the called mobile phone PTEL is selected as a result, the mobile phone PTEL is called from the fixed radio station FRS. Then, the communication path between the exchange PBX extension and the fixed radio station FRS is connected.

When making a call from the mobile phone PTEL, use this as a fixed radio station.
It receives via FRS and sends it to the extension telephone FTEL of the exchange PBX which has a correspondence relationship with the mobile telephone PTEL. Then, the communication path between the extension of the exchange apparatus PBX and the fixed radio station FRS is connected. If it is an end-of-call notification from the fixed radio station FRS during a call, the call path is disconnected.

The main functions of the radio system controller RCE are as follows.

a) Manage the one-to-one correspondence between the extension telephone FTEL of the exchange PBX and the mobile telephone PTEL.

b) The location registration from the mobile phone PTEL is stored by linking it with the fixed radio station FRS through which it has passed.

c) When an incoming call is received from the extension telephone FTEL of the exchange PBX, an empty fixed radio station FRS to be connected is selected and both are connected.

d) Switching device to be connected when making a call from the mobile phone PTEL
Determine the extension of the PBX and make an outgoing connection between them.

e) The dialing and hooking signals from the mobile telephone PTEL during the call are transmitted to the extension telephone FTEL of the exchange PBX.

f) When the mobile phone PTEL moves to another radio zone during a call, it connects the mobile phone PTEL to the fixed radio station FRS there.

g) When there is an end call notification from the fixed radio station FRS during a call, the call path is disconnected. Set the extension telephone FTEL, fixed radio station FRS, and mobile telephone PTEL of the related switching equipment PBX to the idle state.

h) Operate the maintenance operation console to monitor the operation status of all systems, record the test status, and analyze the data. The maintenance operation console will be described in detail below.

The function that can be input / output on the maintenance console can first display the failure history table or its contents as a maintenance diagnosis function. Next, the operation function can have the following functions as data to be set when the system is installed or changed.

Create a PBX-PID registration table or display its contents.

Set the dial type (10pps, 20pps dial pulse or PB signal) of the PBX line for each line.

Set the width of the flash pulse sent to the PBX line.

Set the accommodation position in the radio system controller RCE of the PBX line.

Set the accommodation position in the radio system controller RCE of the fixed radio station FRS.

Set the monitoring time of the incoming timer in the incoming PID registration table.

It also has the following various table functions as a table.

The PID-SID registration table stores the mobile phone PTEL whose position is registered in the fixed radio station FRS. This table is updated when the wireless system control device RCE receives the location registration request commad and the location registration deletion request command.

Next, the operation mode of the fixed radio station FRS and the mobile phone PTEL using it are stored as the SID status table. There are four operation modes: stop, stand-by, incoming call and call.

Stop mode: Fixed radio station FRS is powered off or offline operation Standby mode: Fixed radio station FRS is a specific mobile phone PTE
Not occupied by L Incoming mode: Fixed radio station FRS is a specific mobile phone PTE
It is occupied by L and the mobile phone PTEL is ringing. Call mode: Fixed radio station FRS is a specific mobile phone PTE.
A state in which the mobile phone PTEL is occupied by L and the mobile phone PTEL is in a call. Also, the mobile phone PTEL is an incoming call timer that monitors the time until each incoming mobile phone PTEL starts ringing as an incoming PID registration table. The incoming call timer waits for the following three states.

Clear (not in use) Counting (counting) Timeout Furthermore, the PBX-PID table shows a one-to-one semi-fixed correspondence between the line of the radio system controller RCE and the PID of the mobile phone PTEL. This table is backed up by the battery even when the power of the radio system controller RCE is turned off.

Further, as a failure history table, it is stored that the failure of the resource in the system detected by the radio system controller RCE and the inconsistent upstream command are received. This table is backed up by batteries even when the RCE is turned off. Output is also possible.

Next, as a self-diagnosis function, a diagnostic program is started by an operation from a console connected to the radio system controller RCE, and failure detection is performed for each card.

After the diagnostic program processing is completed, the quality judgment result is displayed on the console.

When an abnormality is detected, it is registered in the fault history.

Moreover, the contact output of the following alarms can be performed as an alarm function of the radio system controller RCE.

a. Heavy alarm contact output This is an alarm output when a serious failure related to the operation of the system occurs, and indicates that it is in a state that requires urgent repair.

b. Light alarm contact output This is an alarm output when a comparatively minor failure occurs in the system, and although it is abnormal, it indicates that the system is manageable.

c. Line power outage contact output Alarm output when line power outage occurs (iv) Portable maintenance and monitoring console I, II A portable maintenance and monitoring console I type is shown in FIG. 2 or FIG. It is composed of a display unit, an operation unit and a data analysis unit, and is made compact and lightweight so that it can be easily carried by people. The difference between type I and type II is that the type I is used by connecting to the interface terminal of the fixed radio station FRS, while the type II has a radio part and directly accesses the fixed radio station FRS wirelessly. This is possible. That is, the second
The type II mobile phone PTEL shown in the figure and the type I portable maintenance and monitoring console can be considered to be type II. Therefore, in the description of the present text, the function will be described focusing on the portable maintenance monitoring console (hereinafter abbreviated as console) type I.

First of all, a terminal maintenance monitoring control program with functions for terminal initial setting for terminal (FRS, PTEL) operation, monitoring of normal operating state, and terminal maintenance monitoring such as operation test It is made to reside inside the fixed radio station FRS.

The terminal maintenance monitoring control program is started and controlled by a personal computer PC connected externally via the serial I / O built into the input / output control program BIOS of the mobile phone PTEL or fixed radio station FRS, and the control results are all PC PC
Transfer to and display on the PC display.

For convenience, it is necessary to simplify the terminal maintenance monitoring control program installed in the mobile phone PTEL or the fixed radio station FRS as much as possible in order to reduce the load on the CPU.
Therefore, this has only basic functions, and the other man-machine interface is shared by the personal computer PC side, and the terminal maintenance monitoring function is realized by both.

Among the above mentioned radio system controller RCE, fixed radio station FRS, mobile phone PTEL and portable maintenance monitoring consoles I and II, the operation of the former three party system, that is, the operation for use by the caller is explained, and finally the maintenance monitoring The system operation will be described.

The system according to the present invention employs a distributed control system instead of the centralized control system.

The system consists of the radio system controller RCE-wired section of fixed wireless station FRS and fixed wireless station FRS-wireless section of mobile phone PTEL.
Break up.

In the wired section, the fixed radio station FRS is the main, and the radio system controller R
CE has a subordinate relationship-The radio system controller RCE notifies the fixed radio station FRS of an incoming call.

・ When the fixed wireless station FRS receives a line setting request, the specified line is connected according to the request.

-Relay communication from one fixed wireless station FRS to another fixed wireless station FRS.

In the wireless section, the mobile phone PTEL is mainly used, and the fixed wireless station FRS
Has a subordinate relationship ・ When receiving the incoming call information from the radio system controller RCE or when receiving a call request from the mobile phone PTEL, set the radio line, but at this time, select the radio line. Mobile phone PTEL will do.

・ Regarding location registration, the mobile phone PTEL checks the fixed radio station FRS that can be serviced by itself and notifies the fixed radio station FRS of the result directly or indirectly to register itself.

The call line is set in the order of a wireless line and then a wired line.

Therefore, when a call occurs, the fixed radio station FRS is first selected by the mobile telephone PTEL and the radio line is set.

The fixed radio station FRS selected as a result is the radio system controller R.
Instruct the CE to connect to the outside line and complete the call line setting.

As mentioned above, the control of the mobile phone PTEL is made to be decentralized by having the center of the judgment in the line setting operation registration at the time of the incoming and outgoing calls including the position registration.

The distributed control reduces the load on the radio system controller RCE, and at the same time, the setting of the radio line is fixed radio station FRS-mobile phone P.
Since it can be done in the minimum section between TEL, the line setup time can be shortened.

Further, the number of control wireless channels is not limited to one (more precisely, one per one wireless zone) as in the conventional system, and it is possible to use multiple control channels simultaneously for different purposes such as location registration, call origination, and call termination. did. For example, the control channel a (abbreviated as Pc-ch) is a position registration channel, and is used to perform notification, position registration, and position registration deletion described below. On the other hand, the control channel b (abbreviated as Cc-ch) is used as an outgoing / incoming call control channel to switch between incoming and outgoing soda. Although it is possible to assign different channels to outgoing calls and incoming calls, in the following description, the case where they are assigned to one channel will be described. The reasons for using a plurality of control wireless channels as described above are as follows.

The processing capacity is significantly increased as compared with the case of one. Even if this is simply considered, it can be expected that the processing capacity will be doubled if the number is two, and if the number is three, the signal format can be unified as described further, and the efficiency of the signal traffic can be improved. Since it can be improved, more processing capacity can be expected.

The format of signals relating to location registration and call origination / reception is shown in FIGS. 5 (c), (d), (e), (f), (k) and (l).
As shown in FIG. 5, they are different from each other. Therefore, if transmission and reception are performed on one control channel, there is a space between one signal and another signal, which is inefficient. On the other hand, if only one format is used, or if the number of types is reduced without using only one format, improvement in efficiency can be expected.

For example, when sending a location registration signal from a mobile phone, monitor the location registration signal sent from another mobile phone in the vicinity in advance, and adjust it according to the signal timing sent from the fixed wireless station. By transmitting, it becomes possible to prevent signal collision, radio wave emission is eliminated, and interference and interference can be reduced and frequency can be effectively used.

It is possible to set the control signal speed separately for each type of system operation, such as 2400 bps for location registration and 1200 bps for incoming and outgoing calls, and set the signal reliability and traffic density to the optimum values for each system. This makes it easier to design.

As a result of-, the system operation becomes quick and the useless connection delay time is reduced.

In addition, control signal speed for wireless line control is 2400bps
It is possible to further shorten the line setting time and improve the efficiency and shorten the control channel occupation time by adopting an out-of-band control signal of 100 baud in the talking state.

Based on the above configuration and conditions, next, the operation of the system of the present invention will be described as follows: (i) location registration relationship, (ii) incoming call, (iii)
Calling and (iv) zone switching will be sequentially described below.

(I) Location registration relationship When a call occurs, first call the mobile phone PTEL and then the fixed wireless station.
Control is performed to set the wireless line between FRS,
In order to do this efficiently for a mobile phone PTEL that moves freely in the service area, the fixed radio station FRS always knows the mobile phone PTEL that is within its own service area (Zo), Similarly, it is necessary for the mobile phone PTEL to always keep track of the fixed radio station FRS existing in its own service area (Zo). For this purpose, location registration is performed.

To facilitate location registration from mobile phone PTEL,
Figure 5 (a), which differs from the fixed radio station FRS depending on the state
Two types of notification signals as shown in (b) are transmitted.

Notification signal 1 Notification signal only for notification to mobile phone PTEL Notification signal 2 Notification signal for notification of mobile phone PTEL and transmission of incoming call information including incoming call information Fixed radio station FRS Regarding the notification mode, the following three modes are set. (See Fig. 6) (b) Stationary mode In this mode, only Pc-ch and Cc-ch are monitored.

(B) Notification mode 1 When in this mode, Pc-ch sends notification signal 2 when incoming information is generated, otherwise notification signal 1 for 4 seconds ± α intervals for 20 seconds. Send intermittently.

(C) Notification mode 2 When in this mode, Pc-ch sends notification signal 2 if incoming call information is generated, and if not, notification signal 1 for 4 minutes ± 10 minutes at intervals of α, for example. Send intermittently.

Location registration is performed by fixed radio station FRS and mobile phone P for each zone.
It is carried out by the following interaction with TEL.

Basically, the fixed radio station FRS needs to notify (send a control signal) while the mobile phone PTEL is in the service area of its own, and the mobile phone PTEL is not in service. If it is determined that the notification is stopped, the stationary mode is entered.

The determination for this mode transition is made independently in each fixed radio station FRS as follows.

The fixed radio station FRS needs to determine whether or not the mobile phone PTEL is present within its own service area when the power is turned on and when the state transitions from the call state and the incoming state to the standby state.

Therefore, the notification mode 1 is unconditionally entered.

When the notification request signal or the position registration request signal from the mobile phone PTEL is not received during the notification mode 1, the stationary mode is entered after the notification mode 1 is ended as shown in.

When the notification request signal or the location registration request signal from the mobile phone PTEL is received during the notification mode 1, it is determined that the mobile phone PTEL is present, and the notification mode 2 is entered from that time.

When the incoming call information is generated when the fixed radio station FRS is in the stationary mode, the notification mode 1 is entered from that time.

Also, in the stationary mode, when the notification request signal from the mobile phone PTEL or the position registration request signal (these are transmitted on the control channel a dedicated to the position registration) is received, it is determined that the mobile phone PTEL is present. Judgment is made, and then the notification mode 2 is entered.

When the notification request signal or the position registration request signal from the mobile phone PTEL is not received during the notification mode 2, it is determined that the mobile phone PTEL is not present and the notification mode 2 is ended.

At this time, if incoming information is generated during the period of the notification mode 2 and 20 seconds or more has elapsed from the generation, the stationary mode is entered.

After the notification mode 2 ends, if the incoming call information occurs during the notification mode 2 period and 20 seconds or more has not elapsed since the generation, the notification mode 1 is entered.

Next, the location registration control of the fixed wireless station FRS will be described.
When the fixed wireless station is turned on, the transmission of the notification signal 1 is started. This transmission continues until the timer 1 times out. When the fixed wireless station FRS receives the position registration request signal from the mobile phone PTEL while transmitting the notification signal 1 or 2 (notification mode (1, 2)) or in the stationary mode, the fixed wireless station FRS includes its own When the SID is included, the position registration processing is performed for the PID included in the signal, and the position registration response signal is transmitted to the mobile phone PTEL.

When this is completed, the transmission of the notification signal 1 is continued as it is. When the above signal from the mobile phone PTEL is not received, the incoming call information is generated, but if it is generated, the notification signal 2 is transmitted after that, and the notification operation is continued. Further, if the incoming signal information does not disappear, the operation of the notification signal 2 is continued, and after the notification signal transmission period timer ends, the notification signal 1 is transmitted and then the mode shifts to the stationary mode. Will receive the notification request signal and the like. If the incoming call information disappears among the above, the operation of the notification signal 1 starts from this point.

As the position registration process, a "PID registration table" (Table 1) is generated in its own memory (storage unit in FIG. 3),
This is notified by registering the PID included in the signal there and sending a position registration request command to the radio system controller RCE.

Here, the electric field strength is the received electric field strength of the location registration request signal, and the registration timer starts from the time of registration, and a maximum of 180 times / 10
Seconds (30 minutes). Further, the in-range state is set to the in-range state when an incoming call occurs and the incoming call is abandoned, and when a notification of an incoming call timer error is received from the radio system controller RCE. In addition, when the presence of the mobile phone PTEL is confirmed, such as when a signal from the mobile phone PTEL that has become unknown is received, it is determined that the mobile phone is in the service area.

Next, the location registration deletion control of the fixed radio station FRS will be described.

When the location registration deletion request signal from the mobile phone PTEL is received, the fixed wireless station FRS specified by this signal only when the own SID is included in it (Fixed wireless station FRS you want to delete the location registration) In contrast, the radio system controller RCE
The fixed wireless station FRS, which has notified this via the mobile phone PTEL and deletes the corresponding PID on the "PID registration table" of itself, via the via-route.

FIG. 7 shows a flow chart of the position registration operation.

Next, regarding location registration control from the perspective of mobile phone PTEL
This will be described with reference to the flow chart of the figure.

When the mobile phone PTEL receives the notification signal from the fixed wireless station FRS and checks the electric field strength of the signal and exceeds a certain value, it determines that its own service is possible and performs location registration for the fixed wireless station FRS. At the same time, the fixed wireless station that registered the location
Register FRS in its own internal table shown in Table 1.

Therefore, in order to notify the presence of the self and prompt the transmission of the notification signal, the mobile phone PTEL transmits a notification request signal to the fixed wireless station FRS when the power is turned on and when the call state transits to the standby state.

The fixed radio station FRS receives this signal and sends it to the mobile phone PTE.
Notify L that the notification signal has been received. When the mobile phone receives this signal, it shifts to the SID search operation described below, but when it is not received, the notification from the fixed radio station FRS is detected because it is around the zone due to movement etc. The notification request signal is transmitted after, for example, 10 seconds (notification detection allowable time = 4 seconds × 2.5: notification cycle) has elapsed since it was no longer possible.

In addition to this, even when the notification signal from the fixed radio station FRS is received, when the reception level is less than a certain value and the specified number of times is received, the notification request is transmitted from the mobile phone PTEL.

When the notification signal is received, the internal "SID registration table" (storage unit in FIG. 2) is searched for the SID included in the notification signal.

As a result, if the fixed radio station FRS that sent the received notification signal has already registered its location, the location registration information ("electric field strength" and "registration timer") associated with that SID is updated. If it is a fixed wireless station that is not registered but is unregistered, this is because the mobile phone PTEL moves to a new wireless zone due to movement and receives a notification signal from the fixed wireless phase FRS arranged there. , Execute location registration operation.

As the position registration processing, a position registration request signal is transmitted, and the reception of a position registration reaction signal from the fixed radio station FRS is waited for. After that, when the location registration response signal is received within the specified waiting time, this is registered in the "SID registration table" for "SID", "field strength" and "registration timer".

When the location registration response signal is not received, the location registration request signal is retransmitted. If it is not received even after resending the specified number of times, it is regarded as location registration failure and “SID registration table”
Will not be registered.

Now, in the above case, if a certain period of time elapses without receiving a notification signal from the fixed wireless station in a state where the position is registered in a certain fixed wireless station FRS, the registration state of the mobile phone in the fixed wireless station becomes It becomes "deregistration pending status". In this state, the location registration deletion signal to which the SID of the fixed wireless station FRS in the "deletion hold state" is added is transmitted to the fixed wireless station FRS that has newly completed the location registration. The fixed radio station FRS is designated by the fixed radio station FRS (a fixed radio that you want to perform location deregistration only if it receives the location deregistration signal from the mobile phone and only if it contains your SID. Station FRS) via the radio system controller RCE to notify this and mobile phone PTEL
A position registration deletion response signal is transmitted to.

Upon receiving the notification, the fixed wireless station FRS deletes the corresponding PID on its own “PID registration table”.

If there is no information about the "registration deregistration pending state" in the above, if it is determined that the mobile station is near the registration boundary state of the fixed radio station FRS (due to a decrease in the reception electric field) due to movement, a broadcast request signal is transmitted according to the broadcast request period If the above judgment is not made or there is no information on the registration confirmation state near the timer up, it means that it is near another fixed radio station FRS, and will try to receive the broadcast signal.

Finally, the location registration control in the radio system controller RCE will be described.

The radio system controller RCE does not have a direct judgment function for location registration control, and manages only result information about location registration notified from the fixed radio station FRS. Management is performed by the "PID-SID registration table" (M in Fig. 4) in the radio system controller RCE.
EM) is generated and registration or deletion is performed according to the information notified from the fixed radio station FRS.

There are two types of information notified by the fixed radio station FRS: "location registration information" and "location registration deletion information", which are notified by "location registration request command" and "location registration deletion command", respectively.

Further, the radio system control device RCE relays the “location registration deletion command” to the specified or all fixed radio stations FRS according to the instruction included in the command.

FIG. 11 is a flow chart showing an example of the operation of location registration, and shows the one corresponding to FIG. 7 in another expression.

(Ii) Incoming call When the radio control unit RCE receives an incoming call from the exchange PBX, it controls the incoming call for that call. When performing incoming call control, a "incoming call PID registration table" (MEM in FIG. 4) is generated in the radio system controller RCE to perform incoming call control.

Incoming calls are set up and connected by the radio system controller RCE in the following order.

When receiving a call, the radio system controller RCE
After registering in "PID registration table", all fixed radio stations FRS
A command G for receiving start execution is sent to the.

Upon reception of this instruction, the fixed radio station (FRS) transmits an incoming signal addressed to the called mobile phone by using the incoming control channel. On the other hand, if this is received by a mobile phone in the vicinity, after confirming the ID, a free channel for communication is searched, and if it is found, the channel is specified and the wireless line connection request signal is sent to the fixed wireless station. Reply to FRS (see Fig. 8 (a)).

When an incoming call setting request command is received from a fixed radio station FRS that has successfully connected to a wireless line, the incoming call setup is completed to notify all the fixed radio stations FRS that the incoming call destination has been determined. Send a notification G command.

At the same time, the S that made the incoming call setting of the "SID status table"
Register the incoming PID in the ID to activate the incoming mode.

When an incoming call response request command is received from the fixed radio station FRS, refer to the “SID status table” to confirm that the SID is in the incoming mode, and then connect the line between the fixed radio station FRS and the exchange PBX. While doing, "SID status table"
Change the mode of the above SID to the call mode and register it.
Delete the PID from the ID registration table.

This ends the incoming call processing.

The incoming call control of the fixed radio station FRS is performed in the following order.

When receiving the incoming start execution instruction G command from the radio system controller RCE, if the PID is registered in its own “PID registration table” when it is in the standby state, the external incoming call state is entered and the following Perform incoming / outgoing call processing.

In Cc-ch, the incoming signal is sent to the PID specified by the incoming call start execution instruction G command, and the mobile phone P
Wait for incoming call response signal from TEL.

After that, receive the incoming call response signal from the mobile phone PTEL,
If your SID is included in the destination SID of the same signal,
Performs wireless line connection processing under the initiative of mobile phone PTEL.

When the wireless line setting is completed and the wireless line connection request signal from the mobile phone PTEL is received, an incoming call setting request command is sent to the wireless system controller RCE, and the wireless system controller
This is notified to all fixed radio stations FRS via RCE.

The fixed radio station FRS transmits a ringing tone ringing signal to the mobile phone PTEL in order to ring the ringing tone. After that, when a communication incoming signal addressed to itself is received from the mobile phone PTEL, an incoming call response request command is sent to the radio system controller RCE, and a transition is made to the call state.

This completes the external call origination process. FIG. 8 (b) shows a state transition diagram in this case.

Next, the wireless line connection processing will be described.

Fixed radio station FRS, for the Cc-ch uplink and downlink,
Perform carrier detection. As a result, when it is confirmed that it is available, an incoming signal is transmitted to the mobile phone PTEL.
After completion of the incoming signal transmission, for example, it waits for a response from the mobile phone PTEL for 1 second.

If there is no response from the mobile phone PTEL during this period, after the standby is completed, α seconds have elapsed, and then the lid reception signal is sent (retransmitted) and the standby for 1 second is started. (Α is a fixed wireless station
It is determined by the random timing set independently for each FRS. ) During this time, if there is no response from the mobile phone PTEL, the wireless line connection fails.

The signal elements of the incoming signal are as shown in FIG. 5 (e).

The empty call channel is information for one channel of S-ch, which the fixed radio station FRS has previously detected empty.

The transmission of the mobile phone PTEL incoming response signal in response to this will be described.

The mobile phone PTEL uses the following judgment criteria from among the incoming signals received within a maximum of 1 second from the completion of receiving the incoming signal from the fixed wireless station FRS that first arrived at itself in Cc-ch. Select one.

In the incoming signal, the designated S-ch information is compared with the S-ch information which has been detected in advance on the mobile phone PTEL side, and the incoming signal having the matching information is checked.

From the incoming signals having the same empty S-ch information, the signal with the highest signal reception electric field strength and the best quality is selected.

At this time, if there is no signal having the received electric field strength of the above level, the first received signal is selected from the fixed radio stations FRS showing the remaining reception quality.

If it is not possible to select by ,, select according to from the case where the condition of is not satisfied.

An incoming call response signal including the SID selected above is returned to the fixed radio station FRS.

Call channel acquisition is performed as follows.

When the fixed radio station FRS receives an incoming call response signal from the mobile phone PTEL addressed to itself, the fixed radio station FRS sequentially performs the empty detection for the designated three S-chs. When the empty S-ch is detected, the channel switching completion signal is continuously transmitted to the mobile phone PTEL for about 0.5 seconds. During this time, the wireless line connection request signal from the mobile phone PTEL must be received.

If the S-ch is not empty and if the continuous transmission of the channel switching completion signal for about 0.5 seconds is completed, the wireless line connection fails.

The mobile phone PTEL sequentially searches for the specified S-ch,
Wait for the channel switching completion signal from the fixed radio station FRS. When receiving the channel switching completion signal, the fixed wireless station
A wireless line connection request signal is transmitted to FRS.

When the mobile phone PTEL cannot receive the channel switching completion signal from the fixed radio station FRS, the mobile phone PTEL side
Performs incoming call response processing. If this fails, the mobile phone PTEL fails to connect to the wireless line and returns to the standby state.

The signal elements of the channel switching completion signal and the wireless line connection request signal are as shown in FIGS.

When the fixed radio station FRS receives a radio line connection request signal from the mobile phone PTEL, the radio station controller RCE
Sends an incoming setting request command and sends all fixed radio stations FRS
The fixed radio station FRS continuously transmits a ringing tone ringing signal to the mobile phone PTEL connected to the radio line, while notifying the fact to the mobile phone PTEL via the radio system controller RCE. The mobile phone PTEL rings the incoming signal while receiving it.

After this, when there is a call-in operation on the mobile phone PTEL side, a call-in signal is transmitted to the fixed radio station FRS, and the call state is entered. When the fixed radio station FRS receives this, it sends an incoming call response request command to the radio system controller RCE, and enters the call state.

The signal elements of the ringing signal and the incoming call signal are shown in Fig. 5 (i).
As in (j).

FIG. 12 (a) is a flow chart showing an operation example of an incoming call.
FIG. 6B is another representation of FIG.

(Iii) Calling The mobile phone PTEL performs a calling process when a calling request occurs, and connects a wireless line with the fixed wireless station FRS. After the wireless line connection with the mobile phone PTEL is completed, the fixed wireless station FRS sends a call origination request command to the wireless system control device RCE to set the communication line.

In the case of the initial call processing, three fixed radio stations FRS are selected from the fixed radio stations FRS registered in the "SID registration table" (Fig. 2 MEM) inside the mobile phone PTEL in the case of the first call processing. The outgoing call is controlled.

Further, in the case of the re-originating process, the originating process is performed to unspecified fixed wireless stations FRS (all fixed wireless stations FRS in the standby state).

The transmission operation will be described in detail below.

When a call origination request is issued, the mobile phone PTEL performs carrier detection for Cc-ch (control channel) downlink. As a result, when it can be confirmed that it is free,
Of the SIDs registered in the registration table ”, the condition is good S
For example, up to three IDs are selected, and in contrast to this, FIG.
A transmission signal as shown in (1) is transmitted on the control channel 6Cc-ch, which is a control channel dedicated to transmission (in this embodiment, transmission / reception only).

The outgoing signal is continuously transmitted for a maximum of 1 second, during which the fixed wireless station
Wait for a response from FRS. If there is no response from the fixed radio station FRS, the normal transmission fails and 1 + α seconds elapses, and then the re-transmission processing starts. Here, α is determined by random timing independently set for each fixed radio station FRS.

SIDa to c ... Arrange in order of good conditions, according to destination ISD. This sequence becomes the timing information to which the fixed radio station FRS responds.

cha to c ... According to the empty call channel information, the S-chs (call channels) that have been detected as being empty on the mobile phone PTEL side are arranged in the order of newest confirmation time.

FIG. 9 shows a state transition diagram in this case.

When the fixed radio station FRS receives an outgoing signal from the mobile phone PTEL, when its own SID is included as the destination SID, it searches sequentially for the S-ch designated by the same signal. To do. As a result, when an empty S-ch is detected, the S-ch with the latest confirmation time is added to the fifth S-ch.
The transmission response signal as shown in Fig. 1 is transmitted to the mobile phone PTEL at the timing specified by the arrangement of the destination SIDs.

When the mobile phone PTEL receives a call origination response signal from the fixed radio station FRS, the mobile phone PTEL selects a signal satisfying the following conditions from among them.

The empty S-ch information designated in the call origination response signal is compared with the S-ch information which has been previously detected on the mobile phone PTEL side, and a signal having matching information is checked.

The signal having the highest signal reception electric field strength is selected from the transmission responses in which the empty S-ch information matches. At this time, L4
(It is a value when the received electric field strength is divided into 5 levels, and the electric field strength becomes weaker as the numerical value becomes smaller.) If there is no signal with this received electric field strength, it is received first from the remaining L3. Select a signal.

If it is not possible to select by, select from among the signals that do not satisfy the condition of.

When the mobile phone PTEL detects the call origination response signal as described above, it transmits the fixed radio station FRS designation signal to the fixed radio station FRS that has transmitted the signal. After this, fixed radio station FR
Both S and mobile phone PTEL enter the call channel.

Call channel acquisition is performed as follows.

When the fixed wireless station FRS receives the fixed wireless station FRS designation signal from the mobile phone PTEL addressed to itself, the fixed wireless station FRS sequentially performs the empty detection for the designated three S-chs. When the empty S-ch is detected, the channel switching completion signal is continuously transmitted to the mobile phone PTEL for about 0.5 seconds.

The mobile phone PTEL sequentially searches for the specified S-ch,
Wait for the channel switching completion signal from the fixed radio station FRS. When receiving the channel switching completion signal, the fixed wireless station
Send a line connection request signal to FRS.

When the fixed radio station FRS receives the line connection request signal from the mobile phone PTEL, it sends a call origination connection request command to the radio system controller RCE, and also the radio system controller RC.
This is notified to all fixed radio stations FRS via E.

The mobile phone PTEL enters the call state from the time when the transmission of the line connection request signal is completed.

FIG. 12 (b) is a flow chart showing an example of the operation of transmission, which is another expression of FIG.

(Iv) Zone switching Zone switching will be described below.

A call is generated, and outgoing or incoming call processing is executed, and the call state is entered after completion. In the call state, it is possible to send dial signals to the line and send and receive voice signals, but the state of the wireless line is changed by moving the mobile phone PTEL or moving obstacles around the line (including people). Change occurs.

Therefore, the state of the wireless line is managed by monitoring the received electric field strength between the mobile phone PTEL and the fixed wireless station FRS, and if necessary, wireless line management processing such as zone switching processing and out-of-service processing. I do. In addition, the transmission of control signals during a call is out of the voice band (Sv
o-ch).

When the mobile phone PTEL moves during a call and the distance to the fixed wireless station FRS that is communicating oppositely increases and the call quality deteriorates, zone switching is performed.

The mobile phone PTEL will notify the fixed radio station FRS when the received electric field strength of the fixed radio station FRS or the received electric field strength of its own fixed radio station FRS drops below a certain value due to the terminal confirmation signal from the fixed radio station FRS. On the other hand, the monitor request signal as shown in FIG. 5 (m) is transmitted.

When the fixed radio station FRS receives the same signal from the mobile phone PTEL, it sends a monitor request command to the radio system controller RCE. As a result, all the fixed radio stations FRS in the standby state monitor the S-ch designated according to the command.

For the sake of convenience, the fixed radio station FRS in the current call is referred to as “fixed radio station FRSs” or the switching destination fixed radio station FRS is referred to as “fixed radio station FR” for convenience sake.
Sd ".

Zone switching request PTEL continuously sends the zone switching request signal after sending the monitor request signal. The zone switching request signal is transmitted by Svo-ch and has the signal element of FIG. 5 (n).

P ₁ · S-ch information; S-ch information that has been searched for in advance on the mobile phone PTEL side P ₂ Q information; currently used line quality information When Q ≦ l1 is satisfied in this state, zone switching processing 2 to go into.

Zone switching response When the fixed radio station FRS being monitored receives a zone switching request signal on the monitored Svo-ch under the following conditions, it enters the zone switching state from the standby state.

-Zone switching request signal reception condition (zone switching request signal reception electric field strength)> (Q information specified by the same signal) The fixed radio station FRS that has entered the zone switching response state, regarding the S-ch information included in the same signal. Sequential search is performed, and if a vacant S-ch is detected, the S-ch information is detected. If vacancy detection fails, the fixed radio station FRS side detects that the S-ch is empty.
The zone switching response signal as shown in Fig. 5 (o) to which -ch information is added is continuously transmitted after empty detection for Cc-ch, and is monitored.
Svo-ch waits for the reception of the FRS designation signal from the mobile phone PTEL.

Fixed radio station FRS designation When the mobile phone PTEL receives the zone switching response signal on Cc-ch under the following conditions, it replaces the zone switching request signal continuously transmitted on the Svo-ch currently in use with the call with the following The FRS designation signal added with the S-ch information selected by is continuously transmitted.

After this, the fixed radio station FRS and the mobile phone PTEL are both switched.

-Zone switching compatible signal reception condition (zone switching response signal reception electric field strength information)> (currently used line quality Q) S-ch selection conditions are as follows.

1) If the S-ch information contained in the zone switching response signal matches the empty S-ch information that has already been searched for, the S-ch information
If the information 2) 1) is not satisfied, empty detection is performed for the S-ch, and if empty is confirmed, the S-ch information 3) 2), If 1) is not satisfied, the mobile phone PTEL side S-ch information for which the empty channel is newly detected and the S-ch information for which the empty is confirmed is acquired by the following process.

When the fixed radio station FRSd receives an FRS designation signal such as that shown in Fig. 5 (p) addressed to itself on Svo-ch of the monitor channel under the following conditions, it detects an empty S-ch designated by the signal. To do.

・ FRS designated signal reception condition (FRS designated signal reception electric field strength) ≧ (Q information designated by the same signal) When the S-ch sky is confirmed as a result of the sky detection, the same channel of Fig. 5 (q) in the same channel Such channel switching completion signal is continuously transmitted.

Also, if the S-ch is not empty, if the continuous transmission of the channel switching completion signal for the specified time (channel switching completion signal maximum transmission time) is completed, and if the fixed radio station FRS designation signal cannot be received. Returns to the standby state.
(The monitor request is not canceled.) The mobile phone PTEL receives the S-ch designated in the FRS designation signal and waits for the self-addressed channel switching completion signal from the fixed radio station FRSd.

When the channel switching completion signal is received under the following conditions, the line link request signal as shown in FIG. 5 (r) is continuously transmitted instead of the FRS designation signal being continuously transmitted by the Svo-ch currently in use.

-Channel switching completion signal reception condition (channel switching completion signal reception electric field strength)> (currently used line quality Q) The mobile phone PTEL starts the continuous transmission of the FRS designated signal, and then the specified time (FRS designated signal maximum transmission). If the channel switching completion signal cannot be received from the fixed wireless station FRS on the designated S-ch even after the elapse of time), the fixed wireless station FRS
The capture fails and the zone switching request is entered again.

Line link The fixed radio station FRSd sends a connection request command to the radio system controller RCE when it receives a line link request signal from the mobile phone PTEL on Svo-ch during monitoring under the following conditions.

-Line link request signal reception condition (line link request signal received electric field strength) ≥ (currently used line Q) When the fixed radio station FRSd receives a connection completion notification command from the radio system controller RCE, the Svo of the switching channel −ch
At, the continuous transmission of the terminal confirmation signal is started.

In addition, when the connection completion notification command from the radio system controller RCE is not received within the specified time after sending the connection request command, the process returns to the standby state. (The monitor request is not cancelled.) The switching mobile phone PTEL is the Svo-ch of the switching destination and the fixed wireless station FRS.
The line quality Q that is received from the terminal confirmation signal from d and is determined from the electric field information of itself included in the signal and the received electric field strength of the fixed wireless station FRSd is (mobile phone PTEL-fixed wireless station FRSd line quality Q) ≧ (PT
EL-Fixed radio station FRSs When the line quality Q) is satisfied, the call line is switched from the fixed radio station FRSs to the fixed radio station FRSd.

After switching the call line, the mobile phone PTEL starts continuous transmission of the terminal confirmation signal on Svo-ch.

When the fixed radio station FRSd receives the terminal confirmation signal from the mobile phone PTEL, it sends a status setting request command to the radio system controller RCE and also sends to all the fixed radio stations FRS via the radio system controller RCE. And sends a switching completion notice G.

When the fixed radio station FRSs receives the above notification via the radio system controller RCE, it releases the radio line, sends a disconnection request command to the radio system controller RCE, and returns to the standby state.

Further, when the other fixed wireless station FRS receives the above notification, it cancels the monitor for the mobile phone PTEL.

An example of the zone switching process 1 is shown in FIG.

Finally, the ending of the incoming and outgoing call operation, which is left in the system description of the present embodiment, will be described.

Cell phone PTEL end call When the call termination is operated on the cell phone PTEL during a call, or when the call ends as a result of the out-of-range process (see out-of-range process), the end-of-line process starts.

At this time, the mobile phone PTEL continuously sends an end signal to the Svo-ch of the currently used communication line for a specified time, and returns to the transmission completion standby state in any state.

Fixed radio station FRS end call The fixed radio station FRS performs end call processing when it receives a call end signal from the mobile phone PTEL during a call, and when out-of-range processing results in end of call (see out-of-range processing). enter.

At this time, the fixed radio station FRS continuously transmits an end signal at the Svo-ch of the currently used communication line for a specified time, and requests the wireless control device RCE to end the call regardless of the state. Send a command, via the wireless system controller RCE,
This is notified to all fixed radio stations FRS.

Further, all the fixed radio stations FRS cancel all the processes related to the call with the mobile phone PTEL.

Radio system control device RCE end of call The radio system control device RCE receives the end call request command from the fixed radio station FRS, cancels all processing related to the call with the fixed radio station FRS, and notifies the exchange PBX. The end signal is transmitted. The exchange apparatus PBX receives this signal and, when it is connected from the outside line, transmits a termination signal to the exchange.

The case where the present invention is applied to a large-scale high-rise building has been described above. However, it is obvious that the present invention can be applied not only to the inside of a building but also to a premises, an urban area, and a residential area. is there.

(V) Maintenance monitoring operation In order to keep the operation of the system according to the present invention in a good state, it is necessary to monitor the state of each part of the system and perform inspection and maintenance as necessary. The maintenance monitoring operation included in this system will be described below. Of these, the radio system controller RC
Since the self-diagnosis function of each of the E, the fixed radio station FRS, and the portable data PTEL has already been described, the maintenance monitoring operation across two or more devices will be described.

A characteristic of the maintenance monitoring system according to the present invention is that the portable maintenance monitoring console type I described above is connected to any portable telephone PTEL or fixed radio station FRS of the system constituent equipment by a terminal, or the portable maintenance monitoring is performed. By making the console type II wirelessly access any fixed radio station FRS, it is possible to maintain and monitor the entire system except the inside of the radio system controller RCE. That is, assuming that the portable maintenance monitoring console type I is connected to the mobile phone A, the next maintenance monitoring can be performed.

It is possible to check each function of the mobile phone A and perform an operation test, for example, search for a position registration state and inspect an operation state of the wireless unit, and display these results on the display unit.

In addition, by adopting the configuration of FIG. 2 for the mobile phone operation test, the following respective tests of the mobile phone connected to the mobile maintenance / monitoring console become possible. That is, there are an outgoing call connection test and an incoming call connection test. The former issues a call command from the operation unit,
A line is extended from the fixed radio station FRS to the radio system controller RCE, and a response signal is transmitted from the radio system controller RCE. The latter sends an incoming call request signal addressed to the radio system controller RCE, and disconnects the line to send an incoming call signal at a fixed time. In this test, the time analysis until response is analyzed by the data analysis unit and the result is displayed on the display unit.

Each function check and operation test of the fixed wireless station B communicating with the mobile phone A facing each other, for example, a position registration state search, a wireless part operation state inspection, and an operation test, for example, a wireless channel communicating with the mobile phone A facing Are sequentially changed, and the operation in that case is measured.

This will be described below with reference to the flowchart shown in FIG.

In FIG. 15, the operation unit of the portable maintenance / monitoring console I type CP-I connected to the portable telephone A is input to the nearest fixed wireless station B to transmit a maintenance / monitoring call signal. The mobile phone A receiving this signal transmits a maintenance monitoring call signal addressed to the fixed wireless station B. Since this operation is similar to that of FIG. 12 (b) which has already been described, the flow of the calling operation is shown in a simplified manner in FIG. 15 below.

When the fixed wireless station B detects the ID of the mobile phone A, it sends out a call response signal. When the mobile phone receives this signal, it transfers it to the mobile maintenance and monitoring console I CP-I. In CP-I which received this, this information is displayed on a display part. Next, from the CP-I operation unit, channel 1 is started in order to investigate the operating characteristics of all call wireless channels owned by the fixed radio. This signal is transmitted to the mobile phone, and the mobile phone decides to start from the call channel 1 according to the instruction and investigates whether CH1 is an empty channel.
As a result, if the result is "YES", the following operation is executed, and if the result is "NO", it waits for a signal for examining the communication channel 2.
Now, assuming that CH1 is an empty channel, a signal for using the communication channel 1 is transmitted to the fixed wireless station B. The fixed wireless station which receives this confirms that the designated channel is vacant and switches it, and when this is completed, it is transmitted to the mobile phone A. When the mobile phone A receives this signal, it uses the channel 1 to transmit a maintenance monitoring signal. The maintenance monitoring signal here may be, for example, a sine wave with a standard level of 1 kHz, a signal that changes the modulation depth to check the modulation characteristics of a fixed radio station, or various cases. It is selected according to the purpose.

Now, the inside of the maintenance monitoring signal sent from the fixed wireless station is examined, the designated item is executed, and the result is transmitted to the mobile phone A. In the mobile phone A that received this, CP
-Transfer to I. In CP-I, the display is operated,
If necessary, the data analysis unit is operated and the result is analyzed. Specifically, the modulation depth of channel 1
The noise level of the synthesizer, the carrier frequency, the stability of the transmission power, etc. are typed out in some cases.

Since the operation of the radio base station regarding the call channel 1 has been clarified as described above, the operation will be shifted to clarification of the operation of the call channel 2. Therefore, the portable maintenance monitoring console type I instructs B to perform the same inspection as above using the communication channel 2. The following operation is performed in exactly the same way as the above-mentioned channel 1 is changed to 2.

Thus, all the operations of the wireless channel of the fixed wireless station B are collected in the portable maintenance monitoring console type I. Each function check and operation test of the wireless system controller RCE via the fixed wireless station B Retrieval of the current location registration status for a specific mobile phone C or fixed wireless station FRS in the system, history investigation of position registration, specific mobile phone PTEL or fixed wireless station FRS
It is possible to conduct communication history surveys and fault history surveys. A wireless system connection test will be specifically described as a system test.

By calling a specific mobile phone C included in the system from the mobile maintenance / monitoring console I, [mobile maintenance / monitoring console-mobile phone A-fixed radio station B (in communication with A) -radio system controller RCE -All wireless system connection test and line quality measurement between fixed wireless station D (in communication with C) -mobile phone D] are possible. The above-mentioned mobile phone C
Is called for maintenance test without ringing, and is automatically answered without being noticed by the user.

Next, the zone switching test will be described. In addition to the above-mentioned wireless connection test, the zone switching command is input from the operation unit to reduce the transmission power of the fixed wireless station that is transmitting and receiving the test signal facing the mobile phone, and the wireless channel in use. Then, the mobile phone is tested to see if it can switch to the wireless channel between other fixed wireless stations in the vicinity. Needless to say, if there is no other fixed radio station in the vicinity, or if there is communication with a third party and communication is not possible even if there is another fixed radio station, the test up to acquisition of the new radio channel is impossible.

Although the above description is for the case where the portable holding and monitoring console I is connected to the mobile phone, the case where it is connected to the fixed wireless station B will be described. Even in this case, the above-mentioned operations can be performed in exactly the same manner, but the above-mentioned operation is performed via a fixed wireless station. Further, although the incoming call test as the mobile phone operation test can be easily performed, the outgoing call test is performed as follows. That is, a call test signal is transmitted to a specific mobile phone, and a call maintenance signal for the mobile maintenance and monitoring console is transmitted after a certain period of time with the line disconnected.

Next, the usage of the portable maintenance monitoring console type II will be described. It is clear from the above description that this is similar to the case where the portable maintenance monitoring console type I described above is connected to the fixed wireless station.

Lastly, maintenance monitoring using the radio system controller RCE will be described. In this case, a portable maintenance monitoring console is not particularly necessary, and if the maintenance operation console shown in Fig. 4 is used,
Maintenance and monitoring of all the items described above are possible.

(5) Effects of the Invention As described above, by applying the system construction according to the present invention to the small zone system using the microcell, the mobile phone is located anywhere in the service area with high frequency utilization efficiency. Calls can be made and received between the telephone and other mobile phones or fixed telephones, and communication reliability and quality can be improved.In addition, the maintenance monitoring function built into the system, especially the portable maintenance monitoring function, can be used. By using it, maintenance and monitoring can be performed easily and economically, and the system can be maintained in a good condition all the time. Therefore, the effect of improving the convenience of communication is extremely large.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of the present invention, and FIG.
FIG. 1 is a block diagram showing an example of a mobile phone used in the present invention, FIG. 3 is a block diagram showing an example of a fixed radio station used in the present invention, and FIG. 4 is a radio system controller 1 used in the present invention.
5 is a block diagram showing an example, FIGS. 5 (a) to 5 (r) are examples of signal formats used in the present invention, and FIG. 6 is a diagram showing an example of state transition of a fixed wireless station used in the present invention. FIG. 8 is a flow chart showing an operation example of a location registration request in the present invention,
(A) and (b) are a flow chart showing an operation example of an incoming call in the present invention, FIG. 9 is a flow chart showing an operation example of an outgoing call in the present invention, and FIG. 10 is an operation example of a zone switching process in the present invention. FIG. 11 is a flowchart showing FIG. 7 in another expression, FIG. 12 (a) is a flowchart showing FIG. 8 (b) in another expression, and FIG. 12 (b) is a flowchart. FIG. 9 is a flowchart showing another expression, and FIG. 13 is a flowchart showing an operation example of a fixed wireless station.
FIG. 14 is a flowchart showing an example of the operation of the mobile phone, and FIG. 15 is a flowchart showing an example of the maintenance monitoring operation according to the present invention.

Front Page Continuation (72) Inventor Tokuji Yasuda 1-741 Kugayama, Suginami-ku, Tokyo Iwasaki Communications Co., Ltd. (72) Inventor Kazuhide Okamura 1-4-10 Irifune, Chuo-ku, Tokyo TEPCO System Research Institute Co., Ltd. (72) Inventor Yoshihisa Takahashi 4-925 Shibaura, Minato-ku, Tokyo Tokyo Communication Network Co., Ltd. (56) Reference JP-A 64-16054 (JP, A)

Claims (1)

[Claims] 1. A plurality of fixed wireless stations that respectively cover a plurality of zones to form a service area, and a plurality of mobile phones that are present in the service area and can communicate with each of the plurality of fixed wireless stations. A telephone is connected to each of the fixed wireless stations and a general telephone network, and the identification information of the plurality of mobile phones and at least one of the fixed wireless stations that can communicate favorably with the plurality of mobile phones is registered, In a mobile communication system including a wireless control device for making and receiving calls to the plurality of mobile phones via a registered fixed wireless station, each of the plurality of fixed wireless stations and each of the plurality of mobile phones includes: A built-in maintenance monitoring control program that makes the functions of its own station or its own equipment test-operated is built in, and one of the plurality of fixed wireless stations or the plurality of mobile phones is installed. Each fixed machine is connected directly or via a wireless line and is built in the fixed wireless station or the mobile phone, or is connected via the wireless control device to another fixed wireless station or another fixed wireless station. A mobile maintenance monitoring console having an operation function of activating the maintenance monitoring control program built in another mobile phone facing the radio station is provided, and data obtained from the maintenance monitoring control program is stored in the mobile maintenance monitoring console. A maintenance monitoring system for mobile communication, which is configured to perform analysis by a data analysis unit provided and display the analysis result on the display unit.