JPH026461B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to connection control for a mobile communication system connected to a public telephone network.

The line configuration of current car telephones is as shown in FIG. In FIG. 1, RC is a central office, DC is a central office, TC is a central office, and EO is an abbreviation for an end office, which represents the switching hierarchy in a general telephone network. AMC is an abbreviation for mobile telephone switching center, MCS is an abbreviation for radio network control center, and MBS is an abbreviation for radio base station. the current
AMC has one station each in the Tokyo area and Osaka area, and MCS has one station each in the Tokyo area and Osaka area.
There are several stations per AMC, and several stations per MCS for MBS. When calling from a regular phone to a car phone, the subscriber dials, for example, 030-31-XXXXXX. 030 is an identification number representing a car phone,
31 is the number representing the current location of the car,
31 shows an example from Tokyo.

XXXXXXX is the subscriber number of the car phone.
030, we learned that the call was to a car phone through EO and TC on the general telephone network, and furthermore,
31, it was connected to AMC in Tokyo, and then
Connected to car phones via AMC, MCS, and MBS routes.

Because car phones have a wide range of movement,
The area covered by MBS consists of small zones with a radius of several kilometers. Further increasing the subscriber capacity can be achieved by further reducing the area of the MBS and increasing the repeat utilization rate of the radio frequency. For example, if a zone configuration with a radius of 500 m is created, the capacity will theoretically be 100 times greater than a zone configuration with a radius of 5 km. In actual cases, the utilization rate will be lower than this due to interlaced propagation, but an improvement of at least 10 times can be expected. Such an extremely small zone configuration may not be applicable to a car phone because the frequency of channel changes during a call would be extremely high considering the speed at which the car is running, but it may not be possible to apply this configuration to a mobile phone. It will be done.

In such a very small zone configuration, wireless base stations (MBS) are installed at a huge density and quantity, so it is not necessary to install a mobile exchange to support a toll exchange like a conventional AMC due to its processing capacity. It's not a good deal either. Since there are several dozen MBSs per local exchange area, it is more reasonable to think of mobile exchanges as supporting local exchanges.

The present invention uses the above-mentioned minimal zone configuration.
The object of this invention is to realize a line configuration and connection control method for a mobile communication system in which an extremely large number of MBSs are arranged. The invention will now be explained in detail with reference to the drawings.

FIG. 2 shows an example of a line configuration according to the present invention. A plurality of radio base stations are connected to one mobile control station. Furthermore, the communication circuits from one or more mobile control stations are connected one-to-one to the subscriber lines of the EO of the general telephone network. Furthermore, a mobile control center will be provided to handle the intercity exchange schedule. The number for the mobile device is given as mobile service identification number+mobile subscriber number, for example 040×××××××. The mobile device always registers the location of the existing mobile control station area. In this method, for example, similar to the current car telephone system, a number identifying each mobile control station is sent in the transmission signal from the base station, and when the mobile device moves, this mobile control station identification number changes. This can be realized by a method such as sending a location registration signal when the location is reached. A location registration signal from a mobile device is transmitted via a radio base station to a mobile control station, and the mobile control station registers the location of the mobile device with a mobile control center via a control line. The mobile control center has a subscriber memory for each subscriber, which stores the subscriber's location information, subscriber class (VIP or not, etc.), frequency fee, etc. (hereinafter referred to as subscriber information). . If there are multiple mobile control centers, each mobile subscriber is registered with a particular mobile control center (referred to as a home memory station). In this case, for example, by assigning a number to the first 1 or 2 digits of the subscriber number so that the mobile control center can be identified, it is possible to know the home memory station from the subscriber number (for example, 1×××××× is Osaka). Mobile subscribers registered in the mobile control center of
XXX represents a mobile subscriber in Tokyo). FIG. 3 shows the control procedure in the case of a call originating from a mobile subscriber. The numbers in the following description correspond to the numbers shown in FIG.

The mobile device transmits a calling signal consisting of a mobile device number + dial number, etc. to a wireless base station.

The mobile control station that receives the calling signal from the wireless base station determines the existing wireless base station of the mobile device by, for example, selecting the wireless base station that received the signal from the mobile device most strongly, and also uses the control line to The mobile control center 1, which is the home memory station of the mobile device, is accessed and subscriber information (such as whether or not the subscriber is an authorized subscriber) is read out.

If the mobile control station determines that connection is possible based on this subscriber information, it processes the call to the EO in the same way as a normal landline telephone. In other words, it supplements the vacant line among the multiple call paths to the EO, closes the DC loop (equivalent to the off-hook of a regular telephone), and converts the dial number received from the mobile device into a dial pulse or PB signal to send the EO. Send to. Connection from EO is done in exactly the same way as a regular phone call.

, When the called subscriber answers, a subscriber response signal is returned to the originating EO.

In EO, charging starts from this point, and a charging pulse is sent to the mobile control station. The mobile control station counts these billing pulses and calculates frequency charges for the mobile device. The method of transmitting the billing pulse can be easily realized, for example, by applying an interface between the EO and a public telephone as the interface between the EO and the mobile control station.

When the mobile device terminates the call, it notifies the mobile control center 1 of the home memory station of the frequency fee at that time. The mobile control center 1 of the home memory station adds this amount to the frequency fee in the subscriber information.

FIG. 4 shows a connection control procedure when a call arrives at a mobile station. The numbers in the following description correspond to the numbers shown in FIG.

When I dialed from a landline phone to call my mobile device, I received an EO or TC from 040 and learned that the call was for my mobile device, so I called the nearest mobile control center 1.
Connect the line up to

The mobile control center 1 learns the home memory station from the mobile subscriber number and queries the mobile control center 2, which is the home memory station, for subscriber information via a control line.

The mobile control center 1 receives notification of the existing mobile control station number of the mobile device from the mobile control center 2, which is a home memory station, and receives the notification of the existing mobile control station number of the mobile device.
Notify the originating TC or EO of the EO number via the control line (common line signal). The TC or EO that receives this determines the charging index based on this EO number. For example, if the existing mobile control station number of the mobile device is
0422-57-3000. 0422-57 is the area and local code of the EO to which the mobile control station belongs,
3000 is the representative number assigned to the line from the EO to the mobile control station. If multiple mobile control stations are connected to one EO, a different representative number is assigned to each.

Mobile control center 1 calls 0422-57 while keeping the call line between the calling party's general telephone and mobile control center 1 on hold.
-3000 dial number connects to the existing EO of the mobile device and even the mobile control station. Since the multiple lines from the EO to the mobile control station are represented by a representative number, the call will arrive at the mobile control station on one of the available lines.

The mobile control station sends a response signal to the EO by, for example, closing a DC loop. This is EO
Since this is the same as a response from a telephone subscriber connected to the line, a response signal is returned to the upper station.

In this way, the response signal is transmitted to the mobile control center 1.
When received, the mobile control center 1 sends the temporarily stored mobile device number XXXXXXXX to the mobile control station through the set telephone line.
This signal can be realized by, for example, an MF signal.

The mobile control station calls the mobile device from the radio base station using the received mobile device number.

Based on the automatic response signal from the called mobile station, the mobile control station learns the existing wireless base station of the mobile station in the same manner as when making a call. The mobile device notifies the mobile subscriber of the incoming call by a bell or the like.

The mobile control station transmits the mobile device response signal to the mobile control center 1 within the telephone line using a tone signal or the like.

When the mobile control center 1 receives this, it sends a ring back tone to the originating telephone.

When the called mobile subscriber answers, the signal is relayed to the mobile control center 1 via the mobile control station. At this point in the mobile control center 1, the originating telephone - the mobile control center 1 and the destination mobile machine -
It connects the line of the mobile control center 1 and sends the same signal as a response from a general incoming telephone subscriber to the originating EO. Originating EO or
In TC, it appears that the called subscriber has responded for the first time to the call requesting connection to the upper station (mobile control center 1) at 040×××××××, so it is the same as in the normal case. Connections and calls are made as follows.

In the above explanation, the mobile control station and the mobile control center have been described as independent stations, but this is the same even when they are functionally merged with an EO or TC.
In addition, in the line configuration shown in Figure 2, the mobile control center is TC
Although we have shown an example in which the network is connected to an RC, the effect of the present invention is the same regardless of which toll exchange floor in the existing network it is connected to.

In addition, in the explanation of Fig. 3, the example was explained in which the charging pulse for the mobile device is sent to the mobile control station, but after the end of the call, the EO notifies the mobile control station of the frequency, or the mobile control station itself can also dial the number. A method may also be used in which a billing index is determined and the number of calls is calculated. Furthermore, if a common line signal network is established between the switching stations, all the signals between the destination EO and the mobile control center 1 explained in FIG. 4 can be transmitted by common line signals.

As explained above, according to the present invention, a large number of radio base stations arranged at a very high density can be connected to the EO terminal of the general telephone network, thereby enabling efficient and practical control.

[Brief explanation of drawings]

Figure 1 is a diagram of the line configuration of current car telephones, Figure 2
The figure is a line configuration diagram of an embodiment of the present invention, FIG. 3 is a diagram illustrating an outgoing connection from a mobile device in an embodiment of the present invention, and FIG. 4 is a diagram illustrating an incoming connection to a mobile device in an embodiment of the present invention. FIG. RC: General office, DC: Central office, TC: Central office, EO: Terminal office, AMC: Car telephone exchange,
MCS...Radio line control station, MBS...Radio base station.

Claims (1)

[Claims] 1. A mobile control station is provided below the terminal station in the switching hierarchy in a telephone network configuration, and is located at a position corresponding to the long-distance switching hierarchy consisting of the central office, central office, and central office hierarchy. A mobile control center is installed, and calls from mobile devices are connected from the terminal station using the same procedure as the line connection in the telephone network, and incoming calls to the mobile device are connected to the originating terminal station, central station, or central station. , a mobile communication system characterized in that a line is once set up from a central office to the mobile control center, and the telephone network connects the mobile control center to the destination terminal station where the mobile device currently exists. 2. In the mobile communication system set forth in claim 1, the subscriber dial for incoming calls to a mobile device is a mobile service identification number + mobile subscriber number;
A mobile communication system characterized in that the connection from the mobile control center to the destination mobile control station is performed using a number corresponding to a specific subscriber in the destination terminal station, and after the connection, the mobile subscriber number is transmitted. 3. The mobile communication system according to claim 1, characterized in that the interface conditions between the mobile control station and the terminal station are the same as those in public telephones of a general telephone network. 4. In the mobile communication system according to claim 2, when a call arrives at a mobile device, a subscriber response signal in the existing telephone network is sent as a mobile subscriber number transmission request signal from the destination mobile control station to the mobile control center. A mobile communication system characterized by the use of 5. In the mobile communication system according to claim 1, when a call arrives at a mobile device, after the mobile control center receives an automatic response signal from the mobile device, the mobile control center sends a message to the calling party. A mobile communication system characterized by sending out ringback tones.