JP4651730B2 - Wireless transmission device, wireless reception device, and transmission / reception method thereof - Google Patents

Description

  The present invention relates to a radio transmission apparatus, a radio reception apparatus, and a transmission / reception method thereof, and is suitable for application to a mobile station apparatus in which a plurality of mobile station apparatuses are connected to each other under a TDMA network. In recent years, mobile wireless communication of this type has been diversified in usage forms, and can be used not only for conventional telephone calls but also for data communication of personal computers (PC), faxes (FAX), TV images, and the like. is there. Therefore, it is desired that such multimedia communication can be performed simply and efficiently.

  Conventionally, several communication methods that enable simultaneous communication using a plurality of terminal functions (telephone, data, FAX, TV, etc.) have been proposed (Patent Documents 1 and 2). FIG. 5 is a diagram for explaining the principle of the TDMA wireless communication control system (Patent Document 1). The mobile station 52 includes a plurality of types of terminal functions 55 to 57 such as telephone, facsimile, data communication, etc. And the radio base station 51 includes a transceiver unit 53 and a TDMA control unit 54. While the mobile station 52 is communicating with one terminal function, When a call or an incoming call occurs, another time slot of the same frequency is assigned to perform communication by a plurality of terminal functions at the same time.

  Although not shown, Patent Document 2 relates to a mobile videophone system capable of sharing a mobile phone and a videophone, and assigns audio data and image data to different slots in a frequency channel.

JP-A-5-268155 JP-A-8-140143

  However, if the network is a system in which different slots are allocated for each terminal function, call control (slot allocation) on the network side is required each time, and communication control on the terminal and network side becomes complicated. Further, when network communication traffic becomes congested, it is not always possible to secure a plurality of slots (channels) for the same frequency at the same time. Therefore, a case where only data or only a telephone can be communicated frequently may occur. Therefore, it was inconvenient.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a wireless transmission device, a wireless reception device, and a transmission / reception method thereof that can easily and efficiently perform multimedia communication related to voice, data, and the like. It is to provide.

  The radio transmission apparatus according to the first aspect of the present invention transmits the data by collectively transmitting data transmitted using a plurality of slots permitted for transmission in a slot having a larger transmission amount than the slot. A transmission unit that forms a period that is not used for a longer period than the interval between the last part of one slot included in the plurality of slots and the beginning part of the next slot, and other communications using the formed period. And a control unit that performs control for this purpose.

In the transmission method in the wireless transmission device according to the second aspect of the present invention, the data transmitted using a plurality of slots allowed to transmit are collectively transmitted in a slot having a larger transmission amount than the slot, A period not used for data transmission is formed longer than the interval between the last part of one slot included in the plurality of slots and the beginning part of the next slot, and other communication is performed using the formed period. Is to do.

  The radio reception apparatus according to the third aspect of the present invention receives data received by using a plurality of slots allowed to be received together in a slot having a larger transmission amount than the slot, thereby receiving the data. A receiving unit that forms a period that is not used for a longer period than the interval between the last part of one slot and the beginning part of the next slot included in the plurality of slots, and other communications using the formed period. And a control unit that performs control for this purpose.

  According to a fourth aspect of the present invention, there is provided a reception method in a wireless reception device, wherein data received using a plurality of slots allowed to be received are collectively received in a slot having a larger transmission amount than the slot, A period not used for data reception is formed longer than the interval between the last part of one slot included in the plurality of slots and the head part of the next slot, and other communication is performed using the formed period. Is to do.

  Preferably, in a mobile communication system of a mobile communication system in which a plurality of mobile station apparatuses are connected to each other under a TDMA network, a plurality of terminal function units related to a call and data are transmitted to a data mounting area of a transmission slot of the local station. A first mobile station apparatus capable of mounting the data, and a second mobile station apparatus capable of allocating the received data of the reception slot of the local station to a plurality of terminal function units corresponding to a call and data, After connecting a call under the network, the first and second mobile station apparatuses placed in a call mode by the network are related to the plurality of terminal function units for one call channel T2 of the own station. Communication is performed by mixing data for each slot.

  According to the present invention, the first and second mobile station apparatuses placed in a call mode by a network communicate data related to a plurality of terminal function units in each slot for one call channel of the own station. Therefore, a multimedia communication request such as data communication during a call, a call during data communication, or a facsimile communication by FAX during data communication by a PC can be performed without intervention of network control. Can be processed with simple configuration and control. In addition, even if network communication traffic is congested, a desired combination of multimedia communications can be secured.

  Preferably, each of the first and second mobile station apparatuses includes a half-rate code type voice codec, and connects a call at a full-rate transmission speed, and also connects the half-rate voice code data and the data terminal function unit. Such data is alternately communicated for each slot.

  By the way, with the progress of speech coding technology, speech communication is now shifting from the full rate (11.2 kbps) system based on VSELP to the half rate (5.6 kbps) system based on PSI-CELP. On the other hand, on the network (base station) side, the network is being developed so that both the old full-rate mobile station and the new half-rate mobile station (having both full-rate and half-rate functions) can be accommodated.

As a result, the new half-rate mobile station is connected to the old base station using the conventional full-rate specification (3 slots per frame), and the new half-rate mobile station is connected to the new base station. Call connection is possible with rate specifications (6 slots per frame). In the case of the half rate specification, the number of usable communication channels is twice that of the conventional one, so that more mobile stations can be accommodated at the same time. On the other hand, from the viewpoint of data communication, the full rate specification has a larger data transfer capacity per slot. Under such circumstances, each of the first and second mobile station apparatuses includes a half-rate code type voice codec, and connects a call at a full-rate transmission speed, and half-rate voice code data and a data terminal function. The data relating to the section is communicated alternately for each slot.

  In such a system, the data communication speed of the data terminal function unit is reduced to about ½ of that in the case of performing communication alone. However, in general, in the case of a PC or FAX communication that does not require real-time performance, or from the beginning of communication or communication Even if the data communication speed is reduced to ½ on the way, the purpose of data communication can be achieved. On the other hand, sound quality of audio data that requires real-time performance is significantly degraded unless the transmission rate corresponding to the encoding method is maintained.

  However, according to the present invention, it is possible to pack the voice code data for two slots at half rate into the data transfer area for one slot under the full rate connection and transfer it every other slot of the full rate. Accordingly, the substantial transfer speed of the audio data in this case is equivalent to 5.6 kbps under the half-rate connection, and the same sound quality as that of a normal half-rate mobile station can be obtained.

  Preferably, a procedure for starting and ending data communication related to another terminal function unit during communication of data related to one terminal function unit is performed, and a communication channel in which the first and second mobile station apparatuses are communicating Through directly.

  Therefore, no burden is imposed on the network side at the start and end of such data communication. Such data communication start and end procedures can be arbitrarily determined without being restricted by the network side.

  Also preferably, the first mobile station apparatus transmits an identifier for identifying communication data related to a plurality of terminal function units to the transmission data and transmits the second mobile station apparatus to the reception data. Based on the identifier, the received data is distributed to the corresponding terminal function unit.

  According to the present invention, the transmission data of each terminal function unit is assigned with an identifier and transmitted, and the received data of each slot is distributed to the corresponding terminal function unit according to the identifier, so that a complicated prior communication protocol is used. The traffic can be easily organized in real time without the flow of communication data.

  It is not necessary to assign identifiers to all data. For example, in a case where a telephone call is made during data communication, the object can be achieved by assigning an identifier to only one of voice data and communication data.

  Preferably, after the call is connected between the first and second mobile station apparatuses via the communication channel, data communication related to a plurality of terminal function units is performed with predetermined synchronization between the two mobile station apparatuses. Do.

  According to the present invention, the subsequent communication data flow between the first and second mobile station apparatuses is efficiently performed by simple timing control synchronized between the mobile stations. Yes.

  The mobile station apparatus of the present invention is a mobile station apparatus of a mobile communication system in which a plurality of mobile station apparatuses are connected to each other under a TDMA network, and is connected to a radio unit that handles radio signals and the radio unit. A TDMA control unit that performs timing control by the TDMA system, a telephone terminal function unit that handles call data, an interface unit connected to an external or internal data terminal function unit PC, FAX, CPU, etc., the TDMA control unit, A path control unit interposed between the telephone terminal function unit and the interface unit and mounting communication data from the plurality of terminal function units mixed in each slot in the data mounting area of the transmission slot of the own station; It is to be prepared.

  By providing such a mobile station apparatus, it is possible to realize efficient and easy-to-handle multimedia communication without modifying the common (existing) mobile network.

  The mobile station apparatus of the present invention is a mobile station apparatus of a mobile communication system in which a plurality of mobile station apparatuses are connected to each other under a TDMA network, and is connected to a radio unit that handles radio signals and the radio unit. A TDMA control unit that performs timing control by the TDMA system, a telephone terminal function unit that handles call data, an interface unit connected to an external or internal data terminal function unit PC, FAX, CPU, etc., the TDMA control unit, A path control unit that is interposed between the telephone terminal function unit and the interface unit and distributes the received data of the reception slot of the local station to the corresponding terminal function unit according to the destination.

  By providing such a mobile station apparatus, it is possible to realize efficient and easy-to-handle multimedia communication without modifying the common (existing) mobile network.

  As described above, according to the present invention, multimedia communication related to voice, data, and the like can be performed simply and efficiently.

FIG. 1 is a diagram for explaining the principle of the present invention. FIG. 2 is a diagram for explaining the mobile communication system according to the embodiment. FIG. 3 is a diagram for explaining a mobile communication system according to the embodiment. FIG. 4 is a diagram for explaining the mobile station apparatus according to the embodiment. FIG. 5 is a diagram for explaining the prior art.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. Note that the same reference numerals denote the same or corresponding parts throughout the drawings.

  FIG. 2 is a diagram for explaining a mobile communication system according to an embodiment. In the figure, 100 is a public network, MTS is a mobile relay switching center, MSC is a mobile switching center, BS is a radio base station, and MS is an embodiment. The mobile station by PC, PC is a desktop or notebook personal computer connectable to the mobile station MS, and FAX is also a facsimile machine.

  As a mobile network, an existing TDMA network can be basically used. In this case, BS1 and BS2 can accommodate both full-rate MSs and half-rate MSs (full rate + half rate). MSa informs BS1 of the transmission rate of its own station at the time of outgoing call, and MSb informs BS2 of the transmission rate of its own station when responding to paging (simultaneous calling) at the time of incoming call. BS1 and BS2 specify a full-rate or half-rate wireless channel in accordance with the reported transmission rates of MSa and MSb.

  FIG. 3 is a diagram for explaining a mobile communication system according to the embodiment, and shows a frame format of a radio channel according to an example full rate specification.

  In the figure, one frame (20 ms) consists of three slots T1 to T3, and one super frame (720 ms) consists of 36 frames. Each of the mobile stations MSa and MSb is assigned one free call slot by the base stations BS1 and BS2 by call connection control via the control channel at the time of outgoing / incoming calls, and shifts to the call mode.

Here, an example of a call slot will be described. One slot (20/3 ms) consists of 280 bits, the first R is a guard bit for burst transmission, the following P is a preamble, TCH is a call data mounting area, and SW is synchronized. Unique word, CC is color code, SAC
CH is a control channel code, SF is a steal flag, and G is a guard bit. The numbers in the lower column represent the number of bits.

  Although not shown, in the frame format of the radio channel according to the half rate specification, one frame (20 ms) includes 6 slots T1 to T6.

Further, MSa and MSb according to this embodiment are mobile stations capable of data communication (data terminals such as PC and FAX can be connected), and non-call data (communication data, facsimile data, etc.) in call data mounting area TCH. Can be communicated. Such non-call data is transferred through the network in a through state without being converted by the BS.
With such a configuration, basically only a voice call is performed between the MSa and the MSb. Alternatively, only data communication is performed between the PCa connected to the MSa and the PCb connected to the MSb. The same applies to FAXa and FAXb. Furthermore, according to the present invention, simultaneous multimedia communication such as data communication during a call, a call during data communication, or facsimile communication by FAX during data communication by a PC is simplified. Do it efficiently with the method. Details will be described below.

  FIG. 4 is a diagram for explaining a mobile station apparatus according to the embodiment. In the figure, 1 is the main body of the mobile station apparatus, 2 is a radio unit that handles radio signals, 3 is a TDMA control unit that performs communication control by the TDMA system, and 4 Is a path control unit that switches a path between call data and non-call data, 5 is a telephone function unit that handles voice signals, 6 is an exchange of communication data between an external data terminal device PC, FAX, etc. and the path control unit 4 Terminal interface (TIF) to be performed, 7 is a CPU for performing main control of the mobile station apparatus, 8 is a memory (MEM) including RAM, ROM, EEPROM, etc. for storing programs executed by the CPU 7 and various data, 9 is a liquid crystal or the like Display (DSP), 10 is a keyboard (KBD) having dial keys, function keys, etc., 11 is a connector for connecting an external data terminal device, B common bus of CPU7, IB is the same interrupt bus, EB is the same expansion bus.

  In the radio unit 2, the transmission data TXD from the TDMA control unit 3 is modulated by the modulation unit MOD based on π / 4 shift QPSK, and transmitted from the antenna via the transmission unit TX and the antenna sharing unit C. The RF signal from the antenna is received and amplified by the receiving unit RX, and demodulated into the received data RXD by the demodulating unit DEM by π / 4 shift QPSK. In this case, the frequency synthesizer SYN, under the control of the TDMA control unit 3, controls the reception unit RX and the transmission unit TX with the control channel frequency (up and down) at the time of call connection control or the frequency of the designated communication channel at the time of a call ( Tune up and down).

  In the TDMA control unit 3, the reception data register RDRG and the transmission data register TDRG are connected to the CPU 7 via the expansion bus EB, respectively, and these are controlled during call control by the CPU 7 via the control channel (calling, incoming call, It is used as a buffer for communication data in location registration control and the like.

  In addition, the TDMA control unit 3 includes a bit counter (not shown) that counts one frame (0 to 839 bits) in synchronization with the transmission / reception frame, whereby the data bit position in one frame can be specified in bit units.

Further, the timing generator TG generates various timing signals corresponding to the transmission / reception slots of the local station based on the count output of the bit counter. For example, CT is a test timing signal for a voice identifier included in the received data TCH, RT is a read timing signal for reading received data from a receive buffer RBF described later, and TT is used for reading transmitted data from a transmit buffer TBF1 / TBF2 described later. Read timing signal, TS is a transmission buffer TBF
This is a 1 / TBF2 selection signal.

  Although not shown, it goes without saying that the TDMA control unit 3 includes various other configurations necessary for normal TDMA communication control.

  The path control unit 4 basically synthesizes / separates, for each slot, call data that requires real-time characteristics and non-call data that does not necessarily require real-time characteristics.

  Specifically, the transmission buffer TBF1 temporarily stores the voice code data TCD from the codec CDC, and the transmission buffer TBF2 temporarily stores the non-call data TDT from the external data terminal device.

  When data communication and a call are simultaneously performed by this unit, the voice identifier data from the CPU 7 is stored in advance in a predetermined address (for example, the head address portion) of the transmission buffer TBF1, and the voice code data TCD from the codec CDC is It is written from the following address.

  The read control unit TRCT reads the transmission data TXD from the transmission buffer selected by the buffer selection signal TS at the read timing TT from the TDMA control unit 3. This buffer selection signal TS is fixed to TS = 0 when this unit is used only for data communication, and is fixed to TS = 1 when this unit is used only for telephone calls. When this apparatus is used for half-rate calls simultaneously with full-rate data communication, the level of the signal TS is inverted every transmission frame (20 ms). In this case, voice code data including a voice identifier is read from the transmission buffer TBF1 in the transmission frame (slot) of TS = 0, and non-call data is transmitted from the transmission buffer TBF2 in the transmission frame (slot) of TS = 1. Read out.

  On the other hand, the reception buffer RBF temporarily stores a portion of the reception data TCH extracted by the TDMA control unit 3. The read control unit RRCT starts reading the data stored in the reception buffer RBF in synchronization with the read timing RT from the TDMA control unit 3. The read data transfer destination is controlled by a reception data read destination selection signal RS described later. When RS = 0, the read data is transferred to the terminal interface 6 side. When RS = 1, the read data is transferred to the codec CDC side. .

  The D-type flip-flop FF normally holds the read destination selection signal RS = 0/1 that is forcibly set by the CPU 7. The CPU 7 sets the signal RS = 0 when the unit is used only for full rate / half rate data communication, and sets the signal RS = 1 when the unit is used only for a full rate / half rate call. To do. When this apparatus is used for a half-rate call simultaneously with full-rate data communication, the FF is set or reset according to the input signal of the data terminal D at the timing of the inspection signal CT.

  More specifically, the serial-parallel converter S / P converts the serial data of the TCH portion transferred from the TDMA controller 3 to the reception buffer RFB into parallel data bit by bit. The comparator CMP compares the parallel data of the S / P converter and the voice identifier data set in advance by the CPU 7 and outputs “1” as the comparison match signal = when a match is obtained. The signal is latched in the FF at the rising edge of the voice identifier test timing signal CT.

  When the signal RS = 0 at the read timing RT of the reception buffer RBF, the read control unit RRCT transfers read (non-call) data RDT for one slot from the head address to the terminal interface 6. If the signal RS = 1 at the read timing RT of the reception buffer RBF, the read (voice) data RCD for the remaining one slot excluding the voice identifier data of the head address portion is transferred to the codec CDC.

  In the telephone function unit 5, the audio signal from the microphone MIC is sampled by the baseband processing unit BBP and converted into the audio code data TCD by the codec CDC. The audio code data RCD from the read control unit RRCT is converted (reproduced) into audio sampling data by the codec CDC, further converted into an audio signal by the baseband processing unit BBP, and output to the speaker SPK.

  The codec CDC can support both the full rate (11.2 kbps) based on VSELP and the half rate (5.6 kbps) based on PSI-CELP, and operates in any mode according to the control signal C1 from the CPU 7.

  The terminal interface 6 can be connected to the PCb and / or FAXb via the connector 11. The path control between the call data and the non-call data is performed by the path control unit 4, but the path control between the PC communication and the FAX communication included in the non-call data category is based on, for example, terminal identifier information This is performed by the terminal interface 6.

  Therefore, for example, when FAX communication is performed during PC communication, or PC communication is performed during FAX communication, handling by the path control unit 4 is only communication using non-call data. Communication (mixing and distribution) is possible by mixing data and FAX data for each slot.

  In addition, it is possible to perform a PC and FAX communication during a call, or a call during a PC and FAX communication. In this case, the handling by the path control unit 4 is communication using a call and non-call data. Non-call data is further mixed and separated by the terminal interface 6.

  The terminal interface 6 is also connected to the CPU 7 via the common bus CB. The CPU 7 newly connects a call with the CPU 7 of the partner MSa via the connected call channel, and then both mobile stations. It is possible to perform composite communication of call data and non-call data with predetermined synchronization between them. Alternatively, the CPU 7 itself may realize the intelligent terminal function in cooperation with the display DSP, the keyboard KBD, and the like.

  With this configuration, a normal call operation will be described first.

  When a call is made by operating the dial key of the MSa, the nearest BS1 is connected. The transmission rate at the time of outgoing call may be a full rate or a half rate. The call is received by MSb via BS2, and both are placed in a call mode.

  In MSa and MSb, the reception data reading destination selection signal RS = 1 (call mode) and the transmission buffer selection signal TS = 1 (call mode) are fixed, respectively, and the voice identifier check timing signal CT is not generated.

  To describe the operation of the MSb, the audio signal from the microphone MIC is sampled by the baseband processing unit BBP, converted into audio code data TCD by the codec CDC, and temporarily stored in the transmission buffer TBF1. The stored data is sequentially read out by the read control unit TRCT at the timing TT of the transmission slot of the local station, is formatted into transmission slot data by the TDMA control unit 3, and passes through the modulation unit MOD, the transmission unit TX, and the antenna sharing unit C. Sent from antenna.

On the other hand, the RF signal from the antenna is received and amplified by the receiving unit RX at the timing of the receiving slot of the local station, demodulated by the demodulating unit DEM, formatted (inspected) by the TDMA control unit, and the call data TCH therein Are extracted and temporarily stored in the reception buffer RBF. The stored data is successively read out sequentially by the read control unit RRCT, converted (reproduced) into audio sampling data by the codec CDC, converted into an audio signal by the baseband processing unit BBP, and output to the speaker SPK.

  Next, normal data communication operation will be described.

  In the same manner as described above, a call originates from MSa and arrives at MSb, and both are placed in a call mode. The transmission rate for call connection is a full rate that can secure a large transmission capacity per channel (slot). When PCa and PCb (FAXa and FAXb may be used) are connected to MSa and MSb, respectively, data communication can be performed between the two.

  In MSa and MSb, the reception data reading destination selection signal RS = 0 (data communication mode) and the transmission buffer selection signal TS = 0 (data communication mode) are fixed, respectively, and the voice identifier check timing signal CT is not generated.

  To describe the operation of the MSb, the data signal TDT from the PCb is temporarily stored in the transmission buffer TBF2 via the terminal interface 6. Further, it is sequentially read out by the read control unit TRCT at the timing of its own transmission slot, formatted into transmission slot data by the TDMA control unit 3, and transmitted from the antenna through the modulation unit MOD, the transmission unit TX, and the antenna sharing unit C. The

  On the other hand, the RF signal from the antenna is received and amplified by the receiving unit RX at the timing of the receiving slot of the local station, demodulated by the demodulating unit DEM, formatted (inspected) by the TDMA control unit, and the communication data TCH therein Are extracted and temporarily stored in the reception buffer RBF. The stored data is successively read sequentially by the read control unit RRCT and transmitted to the PCb via the terminal interface 6.

  Next, a case where a call is made using the same channel simultaneously with data communication will be described.

  In the same manner as described above, a call originates from MSa and arrives at MSb, and both are placed in a call mode. The transmission rate for call connection is the full rate. When PCa and PCb (FAXa and FAXb may be used) are connected to MSa and MSb, respectively, data communication can be performed between the two.

  At the start of data communication, MSa and MSb are set to receive data reading destination selection signal RS = 0 (data communication mode) and fixed to the transmission buffer selection signal TS = 0 (data communication mode). Also, a test timing signal CT for voice identifier is generated.

  The operation in the MSb will be described. When the user of the MSb presses the voice key VK of the console during data communication, the CPU 7 interrupts and inputs, and the CPU 7 issues a signal TS inversion command to the timing generator TG. Receiving this, the timing generation unit TG inverts the subsequent transmission buffer selection signal TS every transmission frame (20 ms). Further, the CPU 7 writes a voice identifier at the head address of the transmission buffer TBF1, and if necessary, sets the codec CDC to the half rate mode (5.6 kbps).

  In this state, the audio signal from the microphone MIC is sampled by the baseband processing unit BBP, converted to half-rate audio code data TCD by the codec CDC, and temporarily stored in the address following the audio identifier in the transmission buffer TBF1. The

The read controller TRCT uses the buffer TBF in the transmission slot of the buffer selection signal TS = 1.
1 voice data TCD is read, and non-call data TDT in the buffer TBF2 is read in the transmission slot of TS = 0. Since the buffer selection signal TS is inverted every transmission frame (20 ms), the transmission rate of the non-call data TDT is substantially reduced to about ½ of the transmission rate. Since real time is not required, there is no problem even if the transmission rate is reduced to ½.

  On the other hand, the sound quality of audio data that requires real-time characteristics deteriorates significantly unless the transmission rate corresponding to the encoding method is maintained. However, here, by adopting the half-rate audio coding method, the audio data for 2 frames of transmission in the half-rate specification is packed into the data mounting area TCH of 1 frame of transmission in the full-rate specification and transmitted every other frame of the full-rate specification it can. Accordingly, the substantial transmission rate of the audio data in this case is equivalent to 5.6 kbps of the half rate specification, and the same sound quality as that of a normal half rate mobile station can be obtained.

  On the other hand, the RF signal from the antenna is received and amplified by the receiving unit RX at the timing of the receiving slot of the local station, demodulated by the demodulating unit DEM, formatted by the TDMA control unit (call / communication). A portion of the data TCH is extracted and temporarily stored in the reception buffer RBF. The comparator CMP monitors the information of the voice identifier included in the call / communication data TCH, and in the case of a voice block, the read destination selection signal RS = 1, and the voice block is transferred to the codec CDC and the speaker SPK. More sound is output. In the case of a data block, the read destination selection signal RS = 0, and the data block is transferred to the terminal interface 6 and output to the PCb. In this way, the MSb user can listen to the other party's voice during data communication in real time.

  When the MSb user releases the voice key VK of the KDB 10, an interrupt is input to the CPU 7, and the CPU 7 issues an inversion stop command for the signal TS to the timing generator TG. Receiving this, the timing generator TG fixes the subsequent transmission buffer selection signal TS = 0 (data communication mode). In this state, communication data from the PCb is continuously transmitted every frame at the full rate.

  On the other hand, regarding the reception route of the MSb, the voice identifier monitoring function of the reception block and the distribution function of the reception block are always energized so that the voice data from the partner MSa may be sent at any time. Yes.

  In the above embodiment, the case where the user presses the voice key VK before inputting the voice and releases the voice key VK after the input of the voice is described. However, the present invention is not limited to this. For example, the codec CDC is configured to detect an input of audio sampling data and to interrupt the CPU 7 with an audio start interrupt, and detect non-input of audio sampling data for a predetermined time and to interrupt the CPU 7 with an audio end interrupt. May be. In this way, the voice key VK can be deleted and voice can be input at any time.

  In the above embodiment, a case has been described in which voice data is suddenly mixed without performing any call connection control in advance between the MSa and MSb placed in the call mode. However, the present invention is not limited to this. For example, call control information may be exchanged between the MSa and the MSb in advance regarding call start / end. However, even in this case, BS1, BS2, etc. intervening in the network are not involved in this call control at all.

  Next, an example of protocol control for call connection / disconnection during data communication will be specifically described.

The codecs CDC of MSa and MSb are in the half rate mode in advance. In this example, the circuit related to the FF of the path control unit 4 is used for a purpose different from the detection of the voice identifier.

  When the MSb user presses the voice key VK on the console or the voice input is detected by the codec CDC during data communication, the CPU 7 interrupts and inputs to the CPU 7. Insert block data. A predetermined call start request code is mounted at the head of the block data, and other data may be detailed data or dummy data according to the communication protocol. The block data is loaded in the nearest data transmission slot and transmitted. At the same time, the CPU 7 issues a signal TS inversion command to the timing generator TG. Receiving this, the timing generation unit TG inverts the transmission buffer selection signal TS after reading the call start request block every transmission frame (20 ms). That is, the frame immediately after the call start request is transmitted becomes a voice frame, which is then transmitted alternately like a data frame and then a voice frame, thus synchronizing with the MSa.

  On the other hand, in the MSa, the comparator CMP of the path control unit 4 monitors the reception of the call start request code. When the call start request code is detected, the CPU 7 interrupts the CPU 7 via the FF. At this time, the receiving data distribution destination selection signal RS (in this case, generated by the timing generation unit TG) is set to “0”, so that the receiving data in the receiving buffer RBF is transmitted to the terminal interface 6 side. To the CPU 7 through the terminal interface 6. CP7 analyzes the detailed data related to the call start request if necessary.

  Further, the CPU 7 issues an inversion command to the timing generation unit TG from the promise that the next reception block in which the call start request code is detected is a call block, and receives a distribution destination selection signal RS for subsequent received data in one frame ( Invert every 20 ms). As a result, the frame immediately after reception of the call start request becomes a voice frame, and is received and delivered alternately like a data frame and then a voice frame, thus synchronizing with the MSb.

  When the user of the MSb releases the voice key VK of the KDB 10 or when the call data is not detected by the codec CDC for a predetermined time, the CPU 7 interrupts and inputs the block data to the terminal interface 6 for the call end request. insert. A predetermined call end request code is mounted at the head of the block data, and other data may be detailed data or dummy data according to the communication protocol. The block data is loaded in the nearest data transmission slot and transmitted. At this time, the last call data has already been transmitted. At the same time, the CPU 7 issues an inversion stop command for the signal TS to the timing generation unit TG, and the timing generation unit TG that receives this command sets the transmission buffer selection signal TS = 0 (data communication mode) after reading the call end request block. Fix it. Thereafter, the communication data from the PCb is continuously transmitted every frame at the full rate.

  On the other hand, in the MSa, the comparator CMP of the path control unit 4 monitors the reception of the call end request code. When the call end request code is detected, the CPU 7 interrupts the CPU 7 via the FF. At this time, the receiving data distribution destination selection signal RS (in this case, generated by the timing generation unit TG) is in a phase of “0”, whereby the received data in the receiving buffer RBF is transferred to the terminal interface 6. To the CPU 7 and further to the CPU 7 at the terminal interface 6. CP7 analyzes the detailed data relating to the call termination request if necessary.

  Further, the CPU 7 issues an inversion stop command to the timing generation unit TG from the promise that the next reception block in which the call end request code is detected is a data block, and the subsequent reception data distribution destination selection signal RS = 0 (data Fixed to communication mode. Thereafter, communication data from the PCb is continuously received every frame at the full rate.

  As for the reception route of the MSa, the call start request code detection and interrupt request function of the circuit according to the FF 7 is always activated so that the call start request from the partner MSb may be sent at any time. . The same applies to MSb.

  In the communication protocol of this example, by starting a call without returning a call start request confirmation response message from the MSa in response to a call start request message from the MSb, the protocol is simplified, and a call processing that requires real-time performance is performed. The response is improved.

  In order to make the synchronization process between MSa and MSb more reliable and reliable, the communication protocol may be configured to wait for the response message to be returned to the request message and start / end the call. good.

  In practice, as described above, on the one hand, corresponding information (message) is transmitted in response to the occurrence of a request, and on the other hand, specific information (message) that will be received in advance is monitored and detected, and An arbitrary communication protocol can be configured by providing a configuration capable of changing the information (message) to be monitored as desired according to the progress of.

  Further, the protocol control of data communication call connection / disconnection during a call can be similarly configured.

  The communication protocol may be controlled via the data registers RDRG and TDRG of the TDMA control unit 2.

  Further, when performing facsimile communication by FAXa and FAXb during data communication by PCa and PCb, or performing data communication by PCa and PCb during facsimile communication by FAXa and FAXb, the control of the path control unit 4 is interposed. Needless to say, this can be easily realized by a simple data mixing / distribution function (not shown) of the terminal interface 6.

  Further, although the preferred embodiment of the present invention has been described, it goes without saying that various changes in the configuration, control, and combination of each part can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Main part of mobile station apparatus 2 Radio | wireless part 3 TDMA control part 4 Path control part 5 Telephone terminal function part 6 Terminal interface (TIF)
7 CPU
8 Memory (MEM)
9 Display (DSP)
10 Keyboard (KBD)
11 Connector BS Base station CB Common bus EB Expansion bus FAX Facsimile IB Interrupt bus MS Mobile station PC Personal computer RX Reception unit TX Transmission unit

Claims (4)

By transmitting data transmitted using a plurality of slots allowed to be transmitted together in a slot having a larger transmission amount than the slot, a period not used for data transmission is included in the plurality of slots. A transmitter that is formed longer than the interval between the last part of one slot and the head part of the next slot;
A control unit that performs control for other communication using the formed period;
A wireless transmission device comprising: Data transmitted using a plurality of slots allowed to be transmitted are collectively transmitted in a slot having a larger transmission amount than the slot, so that a period not used for data transmission is included in the plurality of slots. A transmission method in a radio transmission apparatus, characterized in that it is formed longer than the interval between the last part of one slot and the head part of the next slot, and other communication is performed using the formed period. By receiving the data received using a plurality of slots allowed to be received together in a slot having a larger transmission amount than the slot, a period not used for receiving the data is included in the plurality of slots. A receiving unit that is formed longer than the interval between the last part of one slot and the beginning part of the next slot;
A control unit that performs control for other communication using the formed period;
A radio receiving apparatus comprising: By receiving data received using a plurality of slots allowed to be received together in a slot having a larger transmission amount than the slot, a period not used for receiving the data is included in the plurality of slots. A receiving method in a radio receiving apparatus, characterized in that it is formed longer than the interval between the last part of one slot and the head part of the next slot, and other communication is performed using the formed period.

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