JP4190927B2 - Base station apparatus, terminal apparatus, and communication system using them - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a base station device, a terminal device, and a communication system using them. In particular, the present invention relates to a base station device and a terminal device that enable communication processing from a plurality of base station devices, and a communication system using them.
[0002]
[Prior art]
In recent years, cordless phones have been used for convenience in homes and portable communication terminal devices have been used outdoors. In particular, the simple mobile phone system has been designed with consideration given to the sharing of homes, offices, and the public. Can also be connected. In a terminal apparatus having such a function, by generally switching the time slot to be received, control channels for the public base station apparatus and the private base station apparatus are alternately received, and both base station apparatuses are simultaneously received. Perform standby processing.
[0003]
A terminal device that simultaneously performs standby processing for a public base station device and a private base station device cannot receive a control channel from the other base station device when communication via one base station device is started. . Therefore, it is not possible to communicate simultaneously through two base station apparatuses. For this reason, for example, even if there is an incoming important message from a private base station apparatus during communication via a public base station apparatus, it has not been possible to handle it (see, for example, Patent Document 1).
[0004]
[Patent Document 1]
JP-A-11-298952
[0005]
[Problems to be solved by the invention]
As an example of technology that enables terminal devices to communicate with each other through two base station devices at the same time, two radio units for modulation / demodulation processing are provided in the terminal device, and the time slots of the two radio units can be controlled independently. A control unit is also provided. According to this configuration, even when one radio unit is communicating, the other radio unit can perform control channel standby processing, so that the other radio unit can detect an incoming call and maintain one communication. A new communication can be started using the other radio unit. However, the two radio units lead to an increase in circuit scale.
[0006]
The present inventor has recognized the above situation and made the present invention. The purpose of the present inventor is to provide a base station device and a terminal device in which one terminal device can talk to a plurality of base station devices at the same time, and It is to provide a used communication system. Another object of the present invention is to provide a base station device and a terminal device that suppress an increase in circuit scale of a terminal device that can talk simultaneously with a plurality of base station devices, and a communication system using them. Another object of the present invention is to provide a base station apparatus and terminal apparatus that can process a plurality of signals in one time slot, and a communication system using them.
[0007]
[Means for Solving the Problems]
  One embodiment of the present invention is a base station apparatus. The apparatus includes: a receiving unit that receives a signal assigned to one of a plurality of time slots from a predetermined base station apparatus; and a time slot that generates a plurality of time slots that are respectively synchronized with the plurality of time slots in the received signal. A generating unit; a channel allocating unit that allocates a control channel to a generated time slot corresponding to a time slot other than the time slot to which a predetermined base station device has allocated a control channel among a plurality of time slots in a received signal; A transmission unit that transmits a signal including a control channel assigned to the generated time slot, and the time slot generation unit uses a time slot to be used for transmission among a plurality of generated time slots for reception Changed toA time slot corresponding to a time slot for reception in a predetermined base station apparatus and a time slot for transmission to which a control channel is assigned in the predetermined base station apparatus is used for reception. A time slot corresponding to a transmission time slot other than the transmission time slot to which the control channel is assigned in the apparatus is used for transmission.
  The “predetermined base station apparatus” may be plural instead of one.
[0008]
The reception unit continues to receive a signal from a predetermined base station apparatus while transmitting a signal from the transmission unit, and the time slot generation unit continuously receives a plurality of time slots synchronized with a plurality of time slots in the received signal. May be generated. Further, when the time slot generation unit cannot generate a plurality of time slots, the reception unit searches for a target base station device and newly receives a signal from the base station device, and the time slot generation unit A plurality of time slots that are respectively synchronized with a plurality of time slots in the newly received signal may be generated.
“When a plurality of time slots can no longer be generated” may include a case where a plurality of time slots can be generated, but the accuracy is degraded.
[0009]
The receiving unit receives signals from a plurality of base station devices as a predetermined base station device, and the time slot generating unit selects a base station device having the largest received power among the plurality of base station devices, A plurality of time slots synchronized with a plurality of time slots in a signal received from the selected base station apparatus may be generated. The channel assignment unit may assign a control channel to a time slot generated corresponding to a time slot other than the time slot to which each of a plurality of base station apparatuses has assigned a control channel.
[0010]
With the above apparatus, a plurality of time slots synchronized with a predetermined plurality of time slots are generated, and a signal is transmitted based on the generated time slots. Therefore, control with one type of time slot is possible.
[0011]
  Another aspect of the present invention is a terminal device. The apparatus includes: a first receiving unit that receives a signal assigned to one of a plurality of time slots from a predetermined base station apparatus; and a plurality of time slots that are respectively synchronized with the plurality of time slots in the received signal. A plurality of time slots that generate a signal from another base station device that is synchronized with a predetermined base station device by changing the time slot generator to be used and the time slot to be used for transmission to be used for reception And a communication processing unit for executing communication processing based on a signal received from a base station device different from the predetermined base station device. In this device,In another base station apparatus transmitting a signal received by the second receiving unit, a transmission time slot in which a control channel is allocated in a predetermined base station apparatus and a reception time slot in the predetermined base station apparatus A time slot corresponding to the slot is used for reception, a time slot corresponding to a transmission time slot other than the transmission time slot to which a control channel is assigned in a predetermined base station apparatus is used for transmission,The communication processing unit is included in the signal from the other base station device in any of the generated plurality of time slots even while executing communication processing with the predetermined base station device and one of the other base station devices. By processing the control channel, communication processing for the other base station apparatus may be executed.
[0012]
A plurality of base stations for generating a plurality of types of time slots from the received signals and processing control channels from a plurality of base station apparatus devices based on the generated time slots. Communication with the device is possible.
[0013]
  Yet another embodiment of the present invention is a communication system. The system includes a first base station apparatus that transmits a signal assigned to one of a plurality of first time slots, and a plurality of second base stations that are synchronized with the plurality of first time slots of the first base station apparatus, respectively. A plurality of second time slots which are time slots and are changed so as to use time slots to be used for transmission, and signals assigned to any of the generated second time slots A plurality of terminal time slots synchronized with any one of the plurality of first time slots and the plurality of second time slots, and the generated plurality of terminal time slots , Including a first base station apparatus and a terminal apparatus capable of communicating with the second base station apparatus. In this system,The second base station apparatus has a second time slot corresponding to the first time slot for reception in the first base station apparatus and the first time slot for transmission to which the control channel is assigned in the first base station apparatus. Use the time slot for reception, use the second time slot corresponding to the first time slot other than the first time slot for transmission to which the control channel is assigned in the first base station apparatus for transmission,The terminal device is included in the signal from the other base station device in one of the generated plurality of terminal time slots even while executing communication processing with either the predetermined base station device or another base station device. By processing the control channel, communication processing for the other base station apparatus may be executed.
[0014]
It should be noted that any combination of the above-described constituent elements and a conversion of the expression of the present invention between a method, an apparatus, a system, a recording medium, a computer program, etc. are also effective as an aspect of the present invention.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
(Embodiment 1)
Embodiment 1 relates to a terminal device that exists in a position where signals from at least two base station devices can be received in a simple mobile phone system. In particular, at least one of the two base station devices is a private base station device owned by an individual user, the rest is a public base station device owned by a communication carrier, and the private base station device is a public base station. Assume that the signal is present at a position where a signal from the station apparatus can be received. The public base station apparatus assigns signals to a plurality of predetermined time slots (hereinafter referred to as “first time slots”) and transmits or receives them as usual. The private base station apparatus in the present embodiment receives a signal transmitted from a public base station apparatus, and a plurality of time slots that are respectively synchronized with a plurality of first time slots in the public base station apparatus from the received signal (Hereinafter referred to as “second time slot”). Further, the private base station apparatus assigns signals to the plurality of second time slots, and transmits or receives them.
[0016]
In addition, the terminal device according to the present embodiment receives one of signals from a public base station device and a private base station device in which a plurality of time slots are synchronized with each other, and receives a plurality of first time slots from the received signal. Alternatively, a plurality of time slots (hereinafter referred to as “third time slot”) synchronized with the second time slot are generated. Since the plurality of third time slots are synchronized with the plurality of first time slots and the second time slot, the terminal device can use the public base station apparatus and the private base in any of the plurality of third time slots. The control channel transmitted from the station apparatus can be received, and a standby state can be established for both base station apparatuses. Further, even when the communication state is established with one of both base station apparatuses, the control channel from the other base station apparatus can be received in any of the plurality of third time slots, so that the standby state can be maintained. Furthermore, a call state with the other base station apparatus can be established while maintaining a communication state with one base station apparatus.
[0017]
FIG. 1 shows a simplified mobile phone system 100 according to the first embodiment. The simplified mobile phone system 100 includes a terminal device 10, a public base station device 12, a private base station device 14, a public line 16, and a private line 18.
The public base station apparatus 12 transmits or receives signals assigned to the plurality of first time slots at a frequency specified for public use. The public base station device 12 can access the public line 16.
[0018]
The private base station apparatus 14 receives a signal from the public base station apparatus 12, generates a plurality of second time slots synchronized with the plurality of first time slots from the received signal, and generates a plurality of second times. The signal assigned to the slot is transmitted or received at a frequency defined for private use. Further, the private base station device 14 can access the private line 18.
[0019]
The terminal device 10 receives a signal from the public base station device 12 or the private base station device 14, and generates a third time slot synchronized with a plurality of first time slots or second time slots from the received signal. . In the third time slot, control channels from the public base station device 12 and the private base station device 14 are received, and a standby state is established for the public base station device 12 and the private base station device 14. Furthermore, even when a call state is established with one of the public base station apparatus 12 and the private base station apparatus 14, the other control channel is continuously received, and therefore the probability of the communication state is possible for the other.
[0020]
FIG. 2 shows a frame format. One frame includes eight time slots, and signals are assigned to any of four time slots as downlink signals and four time slots as uplink signals.
[0021]
FIG. 3 shows the configuration of the private base station apparatus 14. The private base station apparatus 14 includes a base station antenna 20, an RF unit 22, a receiving unit 24, a transmitting unit 26, a signal processing unit 28, a channel allocating unit 30, a time slot generating unit 32, a control channel generating unit 34, and a control unit. 36. The time slot generation unit 32 includes a power measurement unit 38, a determination unit 40, and a synchronization unit 42.
[0022]
The RF unit 22 performs frequency conversion processing, amplification processing, AD or DA conversion processing between a baseband signal and a radio frequency signal. Further, the base station antenna 20 is connected. In addition, signals with different radio frequencies can be processed simultaneously.
The receiving unit 24 demodulates the received signal. Here, since the simplified mobile phone system 100 is assumed, delay detection processing is generally performed on a received signal modulated by a modulation method π / 4 shift QPSK (Quadrature Phase Shift Keying).
[0023]
The power measuring unit 38 measures the power value of the received signal. When there are a plurality of public base station apparatuses 12 that can be received by the private base station apparatus 14, each received power is measured in order to select one public base station apparatus 12 from among them. The public base station apparatus 12 with the largest received power is selected. The received power measurement method and measurement period may be arbitrary.
[0024]
The determination unit 40 compares the reception power values measured by the power measurement unit 38 and selects the maximum reception power value. Furthermore, the reception signal from the public base station apparatus 12 corresponding to the selected reception power value is acquired.
[0025]
The synchronization unit 42 extracts a plurality of first time slots from the received signal acquired by the determination unit 40, and generates a plurality of second time slots from the extracted plurality of first time slots, respectively. Even after the second time slot is generated, a plurality of first time slots are continuously extracted from the received signal, and a plurality of second time slots are continuously generated from the extracted first time slots. In addition, when a plurality of second time slots cannot be generated, the synchronization unit 42 causes the power measurement unit 38 and the determination unit 40 to execute the above-described process again, and newly generates a plurality of second time slots.
[0026]
The control channel generation unit 34 generates a control channel for the terminal device 10.
The channel assignment unit 30 assigns the control channel generated by the control channel generation unit 34 to any one of the plurality of second time slots. Here, the second time slot other than the second time slot corresponding to the first time slot to which the control channel of the public base station apparatus 12 is assigned is selected. When there are a plurality of public base station apparatuses 12, the second time slot to which the control channel is assigned is selected so as to avoid those control channels.
[0027]
The signal processing unit 28 performs predetermined processing on the signal demodulated by the receiving unit 24.
The transmission unit 26 modulates signals assigned to the plurality of second time slots.
The control unit 36 performs timing control and the like of the private base station device 14.
[0028]
This configuration can be realized in terms of hardware by a CPU, memory, or other LSI of an arbitrary computer, and in terms of software, it is realized by a program having a reservation management function loaded in memory. The functional block realized by those cooperation is drawn. Accordingly, those skilled in the art will understand that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.
[0029]
FIG. 4 shows the configuration of the terminal device 10. The terminal apparatus 10 includes an RF unit 50, a transmission unit 52, a reception unit 54, a signal processing unit 56, an interface unit 58, a control channel processing unit 60, a control unit 62, and a time slot generation unit 64. The interface unit 58 includes a speaker unit 66, a microphone unit 68, an LCD unit 70, and a key operation unit 72.
[0030]
The RF unit 50 performs frequency conversion processing, amplification processing, AD or DA conversion processing between a baseband signal and a radio frequency signal. In addition, signals with different radio frequencies can be processed simultaneously.
The receiving unit 54 demodulates the received signal. Here, since the simplified mobile phone system 100 is assumed, delay detection processing is generally performed on a received signal modulated by the modulation method π / 4 shift QPSK.
[0031]
The time slot generating unit 64 extracts a plurality of first time slots or second time slots from the received signal, and generates a plurality of third time slots that are respectively synchronized with the extracted plurality of time slots. Reception processing and transmission processing in the terminal device 10 are based on a plurality of third time slots.
[0032]
The control channel processing unit 60 determines the control channels of the public base station device 12 and the private base station device 14 from the signal demodulated by the receiving unit 54 based on the plurality of third time slots generated by the time slot generating unit 64. Each is extracted and each extracted control channel is processed.
[0033]
The signal processing unit 56 is based on the plurality of third time slots generated by the time slot generating unit 64 and according to the control channels of the public base station apparatus 12 and the private base station apparatus 14 processed by the control channel processing unit 60. Then, predetermined processing is performed on the signal demodulated by the receiving unit 54.
The transmitter 52 modulates the signal based on the plurality of third time slots generated by the time slot generator 64.
[0034]
The interface unit 58 has an interface function with the user, and performs incoming call processing, outgoing call processing, call processing, and the like. For example, the speaker unit 66 outputs a ring tone and the LCD unit 70 displays predetermined information. In addition, a microphone unit 68 and a key operation unit 72 are provided for input.
The control unit 62 performs timing control of the terminal device 10 and the like.
[0035]
FIG. 5 is a sequence diagram showing a communication procedure. The public base station apparatus 12 assigns and transmits a control channel to any one of the plurality of first time slots (S10). The terminal device 10 generates a plurality of third time slots from the received signal (S12). The private base station apparatus 14 assigns and transmits a control channel to any one of the plurality of second time slots synchronized with the plurality of first time slots (S14).
[0036]
The terminal device 10 receives the control channels from the public base station device 12 and the private base station device 14 in the third time slot, and waits for the public base station device 12 (S16). The station device 14 enters a standby state (S18). The terminal device 10 makes a call to the public base station device 12 (S20). As a result, the terminal device 10 and the public base station device 12 enter a communication state (S22), and the terminal device 10 and the private base station device 14 enter a standby state (S24). The terminal device 10 receives an incoming call from the private base station device 14 (S26). The terminal device 10 responds to the incoming call (S28), enters the hold state (S30) for the public base station device 12, and enters the communication state (S32) for the private base station device 14. .
[0037]
FIG. 6 is a flowchart showing a control channel transmission procedure. Here, it is assumed that the control channel is transmitted in one of eight time slots included in one frame. The private base station apparatus 14 receives signals from the plurality of public base station apparatuses 12 (S40). The power measurement unit 38 and the determination unit 40 select the first time slot and the control channel corresponding to the private base station apparatus 14 having the largest received power (S42). The synchronization unit 42 generates second time slots that are respectively synchronized with the plurality of first time slots (S44). Further, the frequency channel used by the control unit 36 is selected (S46). Among the plurality of second time slots, a number i indicating the order of the time slots is set to 1 (S48). If the control channel of the public base station apparatus 12 exists in i (Y in S50), if i is not 8 (N in S52), 1 is added to i (S54), and the process is repeated. If i is 8 (Y in S52), the time slot with the smallest received power of the control channel is selected as i (S56). If the control channel of the public base station apparatus 12 does not exist in i (N in S50), the control channel is transmitted in i (S58).
[0038]
FIGS. 7A to 7C show time slots to which control channels are assigned. FIG. 7A shows a signal received by the private base station apparatus 14. Here, two public base station apparatuses 12 are assumed, and the respective control signals are received as “A” and “B”. Furthermore, it is assumed that a plurality of first time slots are extracted from the reception signal of the public base station apparatus 12 that has transmitted the control signal A as a result of the processing of the power measurement unit 38 and the determination unit 40. FIG. 7B shows a plurality of second time slots generated by the synchronization unit 42. The upper part of FIG. 7C shows a signal transmitted from the private base station apparatus 14, and the lower part of FIG. 7C shows a signal received by the private base station apparatus 14. In the figure, “C” is a control channel of the private base station apparatus 14, and “C” is transmitted using time slots different from “A” and “B”.
[0039]
FIG. 8 is a flowchart illustrating a communication processing procedure. The terminal device 10 receives a signal from the public base station device 12 (S60). The time slot generating unit 64 generates a plurality of third time slots from the received signal for the public base station apparatus 12 (S62). The control channel processing unit 60 receives the control channel included in the signal from the private base station apparatus 14 in any of the plurality of third time slots (S64). In order to make or receive a call, a communication channel is set up with the public base station apparatus 12 (S66).
[0040]
If there is no communication request with the private base station apparatus 14 (N in S68), the control channel processing unit 60 receives a control channel for the private base station apparatus 14 (S70). On the other hand, the control channel processing unit 60 has a communication request with the private base station device 14 (Y in S68), and if there is a collision in the communication channel between the private base station device 14 and the public base station device 12 ( N in S72), the public base station device 12 or the private base station device 14 is requested to reset the communication channel (S74), but it collides with the communication channel between the private base station device 14 and the public base station device 12. If there is no (Y in S72), the communication channel is set with the private base station apparatus 14 as it is (S76).
[0041]
FIGS. 9A to 9C show time slots to which signals for reception are assigned. FIG. 9A shows a signal received by the terminal device 10, where the control channel of the public base station device 12 is “C1” and the control channel of the private base station device 14 is “C2”. FIG. 9B shows a plurality of third time slots generated by the time slot generating unit 64, which respectively receive “C1” and “C2” at predetermined positions. The upper part of FIG. 9C shows a signal transmitted from the terminal apparatus 10, and the lower part of FIG. 9C shows a signal received by the terminal apparatus 10. Here, “T1U” is an uplink communication channel for the public base station apparatus 12, “T1D” is a downlink communication channel for the public base station apparatus 12, and “T2U” is a private base station. The uplink communication channel for the device 14 and “T2D” indicate the downlink communication channel for the private base station device 14, respectively.
[0042]
The operation of the simplified mobile phone system 100 configured as above will be described. The public base station apparatus 12 transmits a signal in which a control channel is assigned to one of the plurality of first time slots. The private base station apparatus 14 receives the signal from the public base station apparatus 12, and the synchronization unit 42 generates a plurality of second time slots that are synchronized with the plurality of first time slots, respectively. The channel assignment unit 30 transmits a signal in which a control channel is assigned to any one of the plurality of second time slots. The terminal device 10 receives a signal from the public base station device 12, and the time slot generation unit 64 generates a plurality of third time slots from the received signal. Further, the control channel processing unit 60 receives the control channel from the public base station apparatus 12 and the private base station apparatus 14 in any of the plurality of third time slots, and processes the received control channel. When the terminal device 10 is in communication with the public base station device 12, the control channel processing unit 60 processes the control channel from the private base station device 14.
[0043]
According to the present embodiment, one base station apparatus generates a plurality of time slots that are respectively synchronized with a plurality of time slots of another base station apparatus, and transmits a signal based on the generated plurality of time slots. Therefore, a plurality of time slots of a signal to be processed by the terminal device become one type, and even in a terminal device that generates only one type of time slot and processes a signal, while performing communication processing with one base station device, the other Can also communicate with other base station apparatuses.
[0044]
(Embodiment 2)
As in the first embodiment, the second embodiment relates to a terminal device that exists in a position where signals from at least two base station devices can be received in the simple mobile phone system. The private base station apparatus in Embodiment 1 generates a plurality of second time slots that are respectively synchronized with the plurality of first time slots in the public base station apparatus. In particular, since a simple mobile phone system is assumed, one frame includes four downlink time slots and four uplink time slots. On the other hand, since the private base station apparatus receives the control channel transmitted by the public base station apparatus in any of the plurality of second time slots, the timing of the downlink and uplink of the time slot in both base station apparatuses is , Two time slots per frame do not match.
[0045]
Since the terminal device transmits or receives signals in a plurality of third time slots, it is not possible to use two time slots in which the downlink and uplink timings of both base station devices are shifted, and transmission is performed. There is a loss in efficiency. The private base station apparatus in the present embodiment changes one frame into three downlink time slots and five uplink time slots, and changes the control channel transmitted by the public base station apparatus. Except for the time slot for receiving, the timing of the downlink and uplink of the time slot in the public base station apparatus is matched.
[0046]
The simplified mobile phone system 100 according to the second embodiment shown in FIG. 1 is effective as the private base station device 14 shown in FIG. 3, and the terminal device 10 shown in FIG. 4 is effective. .
[0047]
FIGS. 10A to 10C show time slots constituting a comparison target frame according to the second embodiment. The upper part of FIG. 10A shows a plurality of first time slots of a transmission signal in the public base station apparatus 12. “P1” in the figure indicates a control channel. The lower part of FIG. 10A shows a plurality of first time slots of a received signal in the public base station apparatus 12. The lower part of FIG. 10B shows a plurality of second time slots of the received signal in the private base station apparatus 14. At “P1” in the figure, the control channel transmitted from the public base station apparatus 12 is received. The upper part of FIG. 10B shows a plurality of second time slots of the transmission signal in the private base station apparatus 14. “P2” in the figure indicates the control channel of the private base station apparatus 14, and is assigned to a time slot different from the control channel of the public base station apparatus 12. The lower part of FIG. 10C shows a plurality of third time slots of the received signal in the terminal device 10. In “P1” and “P2” in the figure, control channels from the public base station apparatus 12 and the private base station apparatus 14 are received, respectively.
[0048]
Here, in the time slots of the public base station apparatus 12 and the terminal apparatus 10, the uplink and downlink timings coincide. That is, the time slot received by the terminal apparatus 10 corresponds to the time slot transmitted by the public base station apparatus 12, and the time slot received by the public base station apparatus 12 corresponds to the time slot transmitted by the terminal apparatus 10. On the other hand, in each time slot of the private base station apparatus 14 and the terminal apparatus 10, there is a portion where the uplink and downlink timings do not match. That is, since “P5” in the upper part of FIG. 10B and “P6” in the upper part of FIG. 10C are all assigned to the time slot to be transmitted, communication is not established in the time slot.
[0049]
FIGS. 11A to 11C show time slots constituting a frame according to the second embodiment. The upper part of FIG. 11A shows a plurality of first time slots of a transmission signal in the public base station apparatus 12. “P1” in the figure indicates a control channel. The lower part of FIG. 11A shows a plurality of first time slots of a received signal in the public base station apparatus 12. The lower part of FIG. 10B shows a plurality of second time slots of the received signal in the private base station apparatus 14. “P1” in the figure indicates a control channel transmitted from the public base station apparatus 12.
[0050]
The upper part of FIG. 10B shows a plurality of second time slots of the transmission signal in the private base station apparatus 14. “P2” in the figure indicates the control channel of the private base station apparatus 14, and is assigned to a time slot different from the control channel of the public base station apparatus 12. Here, one frame in the private base station apparatus 14 has three time slots arranged on the downlink and five time slots arranged on the uplink. The lower part of FIG. 11C shows a plurality of third time slots of the received signal in the terminal device 10. In “P1” and “P2” in the figure, control channels from the public base station apparatus 12 and the private base station apparatus 14 are received, respectively.
[0051]
Here, in the time slots of the private base station apparatus 14 and the terminal apparatus 10 as well, the uplink and downlink timings coincide with each other except for the time slot corresponding to “P1”. That is, since “P7” in the lower part of FIG. 11B and “P8” in the upper part of FIG. 11C are assigned to the receiving time slot and the transmitting time slot, respectively, communication is also performed in the time slot. Is established.
[0052]
The operation of the simplified mobile phone system 100 configured as above will be described. The public base station apparatus 12 transmits a signal in which a control channel is assigned to one of the plurality of first time slots. The private base station apparatus 14 receives the signal from the public base station apparatus 12, and the synchronization unit 42 generates a plurality of second time slots that are synchronized with the plurality of first time slots, respectively. The channel assignment unit 30 transmits a signal in which a control channel is assigned to any one of the plurality of second time slots. At that time, three time slots among the eight time slots included in one frame are allocated to the transmission signal.
[0053]
The terminal device 10 receives a signal from the public base station device 12, and the time slot generation unit 64 generates a plurality of third time slots from the received signal. Further, the control channel processing unit 60 receives the control channel from the public base station apparatus 12 and the private base station apparatus 14 in any of the plurality of third time slots, and processes the received control channel. When the terminal device 10 is in communication with the public base station device 12, the control channel processing unit 60 processes the control channel from the private base station device 14.
[0054]
According to the present embodiment, one base station apparatus generates a plurality of time slots that are respectively synchronized with a plurality of time slots of another base station apparatus, and transmits a signal based on the generated plurality of time slots. In some cases, since the number of time slots allocated to transmission and reception in one frame is asymmetric, the number of time slots that cannot be used for communication with the terminal device can be reduced.
[0055]
The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to combinations of the respective constituent elements and processing processes, and such modifications are also within the scope of the present invention. is there.
[0056]
In Embodiments 1 and 2, the simplified mobile phone system 100 is a target, and further, a public base station device 12 and a private base station device 14 are assumed as base station devices. However, the present invention is not limited to this. For example, a mobile phone system may be used, and the two base station apparatuses may be used as the public base station apparatus 12. According to this modification, the present invention can be widely applied. That is, the time slot lengths in the two base station apparatuses may be the same or one time slot length may be an integral multiple of the other.
[0057]
In Embodiment 1, when the terminal apparatus 10 is in communication with two base station apparatuses, if the terminal apparatus 10 is communicating with one, the other is suspended. However, the present invention is not limited to this. For example, both may communicate simultaneously. Further, communication and hold may be exchanged as appropriate. That is, it is only necessary to be able to cope with communication from two base station apparatuses.
[0058]
【The invention's effect】
According to the present invention, one terminal device can talk to two base station devices at the same time.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a simplified mobile phone system according to a first embodiment.
FIG. 2 is a diagram illustrating the frame format of FIG. 1;
3 is a diagram showing a configuration of the private base station apparatus of FIG. 1;
4 is a diagram illustrating a configuration of the terminal device of FIG. 1;
FIG. 5 is a sequence diagram showing a communication procedure of FIG. 1;
6 is a flowchart showing a transmission procedure of the control channel of FIG. 3;
7A to 7C are diagrams showing time slots to which the control channel of FIG. 3 is allocated.
FIG. 8 is a flowchart showing a communication processing procedure of FIG. 4;
FIGS. 9A to 9C are diagrams showing time slots to which reception signals in FIG. 4 are assigned.
FIGS. 10A to 10C are diagrams showing time slots constituting a comparison target frame according to the second embodiment. FIG.
FIGS. 11A to 11C are diagrams showing time slots constituting a frame according to Embodiment 2. FIGS.
[Explanation of symbols]
10 terminal devices, 12 public base station devices, 14 private base station devices, 16 public lines, 18 private lines, 20 base station antennas, 22 RF units, 24 receiving units, 26 transmitting units, 28 signal processing units, 30 Channel allocation unit, 32 time slot generation unit, 34 control channel generation unit, 36 control unit, 38 power measurement unit, 40 determination unit, 42 synchronization unit, 50 RF unit, 52 transmission unit, 54 reception unit, 56 signal processing unit, 58 interface unit, 60 control channel processing unit, 62 control unit, 64 time slot generation unit, 66 speaker unit, 68 microphone unit, 70 LCD unit, 72 key operation unit, 100 simple mobile phone system.

Claims (7)

A receiving unit for receiving a signal assigned to one of a plurality of time slots from a predetermined base station device;
A time slot generating unit for generating a plurality of time slots respectively synchronized with a plurality of time slots in the received signal;
A channel assignment unit for assigning a control channel to the generated time slot corresponding to a time slot other than the time slot to which the predetermined base station device assigns a control channel among a plurality of time slots in the received signal;
A transmitter for transmitting a signal including a control channel assigned to the generated time slot;
The time slot generation unit is configured to use a time slot to be used for transmission among a plurality of generated time slots for reception, and the reception time slot in the predetermined base station device, A time slot corresponding to a transmission time slot to which a control channel is assigned in a predetermined base station apparatus is used for reception, and transmission other than the transmission time slot to which the control channel is assigned in the predetermined base station apparatus. A base station apparatus using a time slot corresponding to a trusted time slot for transmission . The reception unit continues to receive a signal from the predetermined base station apparatus while transmitting the signal from the transmission unit,
The base station apparatus according to claim 1, wherein the time slot generation unit generates a plurality of time slots synchronized with a plurality of time slots in the continuously received signal. The receiving unit, when the plurality of time slots cannot be generated in the time slot generating unit, searches for a target base station device and newly receives a signal from the base station device,
The base station apparatus according to claim 1 or 2, wherein the time slot generation unit generates a plurality of time slots that are respectively synchronized with a plurality of time slots in the newly received signal. The receiving unit receives signals from a plurality of base station devices as the predetermined base station device,
The time slot generation unit selects a base station device having the highest received power among the plurality of base station devices, and further synchronizes a plurality of times synchronized with a plurality of time slots in a signal received from the selected base station device. The base station apparatus according to claim 1, wherein a slot is generated.   5. The channel allocation unit allocates a control channel to the generated time slot corresponding to a time slot other than the time slot to which each of the plurality of base station apparatuses has allocated a control channel. The base station apparatus in any one. A first receiving unit that receives a signal assigned to one of a plurality of time slots from a predetermined base station device;
A time slot generating unit for generating a plurality of time slots respectively synchronized with a plurality of time slots in the received signal;
By changing a time slot to be used for transmission to be used for reception, a signal from another base station apparatus synchronized with the predetermined base station apparatus is received in any of the generated plurality of time slots. Two receivers;
A communication processing unit for executing communication processing based on the signal received from the predetermined base station device and the another base station device;
In another base station device that is transmitting a signal received by the second receiving unit, a transmission time slot in which a reception time slot in the predetermined base station device and a control channel in the predetermined base station device are assigned. using the time slot corresponding to the credit of the time slots to the receiving, the transmission time slots corresponding to the time slot for transmission of non Taimusuro Tsu preparative for transmission control channel is assigned in the predetermined base station apparatus use,
While the communication processing unit is executing communication processing with either the predetermined base station device or any of the other base station devices, the communication processing unit receives a signal from the other base station device in any of the generated time slots. A terminal apparatus characterized in that a communication process for the other base station apparatus can be executed by processing a control channel included in the signal. A first base station apparatus that transmits a signal assigned to any one of a plurality of first time slots;
A plurality of second time slots that are respectively synchronized with a plurality of first time slots of the first base station apparatus and that are changed to use time slots to be used for transmission. A second base station device that generates a time slot and transmits a signal assigned to one of the generated second time slots;
A plurality of terminal time slots synchronized with any of the plurality of first time slots and the plurality of second time slots are generated, and the first base station apparatus is generated by the generated plurality of terminal time slots. And a terminal device capable of communicating with the second base station device,
The second base station apparatus corresponds to a first time slot for reception in the first base station apparatus and a first time slot for transmission to which a control channel is assigned in the first base station apparatus. And the second time slot corresponding to the first time slot other than the first time slot for transmission to which the control channel is assigned in the first base station apparatus is used for transmission. ,
While the terminal device is executing a communication process with either the predetermined base station device or the another base station device, the other base station device may use one of the generated plurality of terminal time slots. A communication system characterized in that a communication process for the other base station apparatus can also be executed by processing a control channel included in the other signal.

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