JP2005260610A - Transmission method and device thereof, and reception method and device thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To insert information to header information arranged at the head of a burst signal. <P>SOLUTION: A transmission rate control unit 44 receives the information regarding a transmission rate in the control information from an interface 32, instructs the encoder 34 of an encoding rate on the basis of the information, and also instructs the modulator 36 of a modulation system. A data length acquiring part 46 receives the information regarding a data length in the control information from the interface 32, and outputs it to a header generator 48. An incoming call notifier 50 receives the incoming call information from the interface 32, and outputs it to the header generator 48. The header generator 48 executes the QPSK modulation of the generated header information. A signal generator 38 generates the burst signal on the basis of the signal inputted from the modulator 36 and the header information inputted from the header generator 48. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a transmission technique and a reception technique, and more particularly to a transmission method and apparatus and a reception method and apparatus for processing header information included in a signal transmitted from a transmission apparatus to a reception apparatus.

In a radio communication system including a base station device and a plurality of terminal devices, for example, the base station device divides a frame defined in a predetermined period into a plurality of time slots, and a plurality of divided time slots include a plurality of time slots. Each terminal device is assigned, and signals are transmitted to and from a plurality of terminal devices. A signal transmitted from the base station apparatus of such a wireless communication system to the terminal apparatus includes an identification code (hereinafter referred to as “identification number”) for identifying the terminal apparatus and a data signal. The terminal device receives the signal transmitted from the base station device, extracts the identification number included in the received signal, and is included in the received signal when the extracted identification number is its own identification number A data signal is processed (for example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 5-75523

  In general, control information arranged at the beginning of a burst signal such as a time slot is called header information, and data following the header information is called a payload. When the receiving apparatus processes the payload based on the contents of the header information included in the received burst signal, it is better that the header information can be processed quickly from the viewpoint of processing delay. On the other hand, since there is no such restriction in the payload, for example, it is possible to perform an error correction process that is more complicated than the header information to further improve the reliability. In such a case, since the above-described identification number is important data for specifying a communication target, it is desirable to include it in a highly reliable payload.

  However, if the identification number is included in the payload and the entire payload has been subjected to error correction processing, the receiving apparatus can only extract the identification number after demodulating and decoding the received payload. Therefore, such processing is required for all burst signals in the frame. As a result, the efficiency of the receiving operation is deteriorated and the power consumption is increased. The same applies to the case where the payload includes a signal for notifying the terminal device of an incoming call from the base station device to the terminal device. In general, when there is no data to be communicated, the terminal device has partially stopped operating (hereinafter referred to as “power saving mode”), but the payload includes a signal that notifies the terminal device of the incoming call. If so, the terminal device must constantly perform reception processing in order to extract the signal, which makes it difficult to operate in the power saving mode.

  On the other hand, if a base station device or terminal device corresponding to a wireless communication system in which a signal or an identification number for notifying an incoming call to the terminal device is included in the payload as described above is already in operation, the reception operation described above is performed. In solving the problems of efficiency and power consumption, it is necessary to consider a base station device and a terminal device that are already in operation. In other words, if the signal or identification number for notifying the terminal device included in the payload is removed, even if the power consumption problem can be solved, communication with these base station devices and terminal devices becomes impossible. End up.

  The present invention has been made in view of such circumstances, and its purpose is that the burst signal is composed of header information and a payload, and the information necessary for the reception operation is included not only in the burst signal but also in the payload. Even so, it is an object to provide a transmission method and apparatus and a reception method and apparatus that improve the efficiency of the reception operation.

One embodiment of the present invention is a transmission device. This device inputs a data input unit for inputting data to be transmitted to a predetermined receiving device, a control information input unit for inputting control information corresponding to the input data, and additional information to be added to the input control information An additional information input unit, a header information generation unit that generates the header information by repeating the input control information by a number smaller than a predetermined number of repetitions, a plurality of the predetermined number of repetitions, and the control information According to the difference in the number of repetitions, an additional information insertion unit that inserts the input additional information into the generated header information, a burst signal based on the header information into which the additional information is inserted and the input data. A burst signal generation unit to generate and a transmission unit to transmit the generated burst signal to the receiving device.
With the above apparatus, in order to insert additional information as part of the number of repetitions in header information generated by repeatedly generating control information a plurality of times specified in advance, while maintaining the data size of the header information, Additional information can be transmitted to the receiving device.

  The control information input to the control information input unit includes a plurality of bits, the additional information input to the additional information input unit includes a predetermined bit, and the header information generation unit includes the plurality of bits. Each of the bits is repeated a number of times less than a predetermined number of repetitions, and the additional information insertion unit sets the number of repetitions for the block in which each of the plurality of bits is a unit. Each value obtained by converting the predetermined bit is inserted instead of each of the plurality of bits until the predetermined number of repetitions is reached from a number less than the plurality of repetition times, Each value obtained by converting the bits of the block is generated so that the average value of each block is close to the value of each of the plurality of bits. It may be.

  A “block” is a unit in which a set of a plurality of bits generated from one bit is combined into one when one bit is repeated a predetermined number of times. As a modification, one bit does not have to have the same value. For example, when it is specified to repeat eight times, the remaining two bits are repeated with other data by repeating six times. Even if it is replenished, the originally defined bit that should be repeated eight times may be used as one block.

  The additional information insertion unit may convert each of the predetermined bits into a value obtained by inverting each value and a combination of the values. The predetermined bits constituting the additional information input to the additional information input unit may be information for notifying the receiving device of an incoming call. The predetermined bits constituting the additional information input to the additional information input unit further include an identification number assigned to a receiving device to which data is to be transmitted, and the additional information insertion unit includes a plurality of the identification numbers. It may be divided into parts, and the divided parts may be inserted into each of the blocks. A plurality of receiving devices to which data is to be transmitted is classified into a plurality of groups, and further includes an allocating unit that assigns a timing for transmitting data to each of the plurality of groups, and the additional information input to the additional information input unit is The information may be a combination of an identification number assigned to a receiving device included in a group to which the timing to transmit the data is assigned and information for notifying the receiving device of an incoming call.

  “Information for notifying incoming calls” corresponds to a signal indicating an incoming call in the case of voice communication, but is not limited to voice communication, and is another signal having an equivalent function in the case of data communication. It may be a signal.

  Another aspect of the present invention is a transmission method. In this method, data to be transmitted to a predetermined receiving device, control information corresponding to the data, and additional information to be added to the control information are input, and the input control information is repeatedly specified in a plurality of repetitions. The additional information input to the generated header information according to the difference between the predetermined number of repetitions and the number of repetitions of the control information while generating header information by repeating the number of times less than the number of times. And a burst signal is generated based on the header information in which the additional information is inserted and the input data.

  Yet another embodiment of the present invention is a receiving device. This apparatus is a burst signal composed of data, control information corresponding to the data, and additional information to be added to the control information, and the control information is less than a plurality of predetermined repetition times. A receiving unit that receives a burst signal inserted according to the difference between the number of repetitions of the additional information and the number of repetitions of the control information, and the additional information, and a received burst signal, An extractor for extracting the header information corresponding to the control information and the additional information, and processing the extracted header information according to the predetermined number of repetitions to derive the control information and the additional information A derivation unit that determines the processing content of the derived control information based on the derived additional information, and the processing content of the determined control information and the A determination unit that determines the processing content of the data based on the out control information, in accordance with the processing contents of determined data, and a processing unit for processing the data.

  The above apparatus processes the header information of the burst signal before processing the data of the burst signal, and determines the control information and the processing content of the data based on the additional information included in the header information. Data processing can be prevented when processing is unnecessary, and the efficiency of the receiving operation can be improved.

  The control information included in the burst signal received by the receiving unit is composed of a plurality of bits, and each of the plurality of bits is defined in advance within a block in which each of the plurality of bits is a unit. It is repeated a number of times less than a plurality of repetition times, and the additional information is composed of predetermined bits, each value obtained by converting the predetermined bits is inserted in each block, and the derivation unit includes: Predetermined bits constituting additional information by performing addition processing inside the block for each of the blocks included in the extracted header information by a predetermined number of repetitions and deriving control information The transformation performed on each of the blocks is based on regularity such that the average value of each block is close to the value of each of the plurality of bits. By utilizing the fact, may derive additional information from each of the blocks.

  “Addition is performed inside a block for a predetermined number of repetitions” is to add a plurality of data contained in one block, and based on addition processing as well as addition processing. It may be a predetermined statistical process, for example, an average process.

  The derivation unit converts the conversion performed on each of the predetermined bits constituting the additional information from each of the predetermined bits to a value obtained by inverting the respective value and a value obtained by combining the respective values. Additional information may be derived from each of the blocks using the conversion. The additional information derived by the deriving unit is information for notifying an incoming call, and the determining unit determines demodulation of data based on the derived control information when the derived additional signal indicates an incoming call May be. The additional information derived by the deriving unit further includes an identification number given to the receiving device that should demodulate the data, and the determining unit determines that the derived control when the derived identification number is its own identification number. Data demodulation based on information may be determined.

  A plurality of receiving devices are classified into a plurality of groups by a transmitting device that should transmit a burst signal, and a data reception timing is assigned to each of the plurality of groups. And a determination unit, the reception unit assigned to the group to which the group should belong, the derived identification number is its own identification number, and the derived additional signal indicates an incoming call. In this case, the demodulation of data based on the derived control information may be determined. A power management unit that sets the power saving mode when the determination unit does not determine demodulation of the data may be further provided.

  Yet another embodiment of the present invention is a reception method. This method is a burst signal composed of data, control information corresponding to the data, and additional information to be added to the control information, and the control information is less than a plurality of predetermined repetition times. A step of receiving a burst signal inserted according to a difference between the number of repetitions of the additional information and the number of repetitions of the control information, and the additional information from the received burst signal, A step of extracting control information and header information corresponding to the additional information, and a step of deriving the control information and additional information by performing processing corresponding to the plurality of predetermined repetition times on the extracted header information And determining the processing content of the derived control information based on the derived additional information and processing content of the determined control information Determining the processing content of the data based on the derived control information, in accordance with the processing contents of determined data, and a step of processing the data.

  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.

  According to the present invention, the burst signal is composed of header information and a payload, and the efficiency of the reception operation can be improved even when the information necessary for the reception operation is included in the payload as well as the burst signal. .

(Example 1)
Before describing the present invention in detail, an outline will be described. Embodiment 1 of the present invention relates to a wireless communication system in which a plurality of terminal devices communicate with a base station device. Here, a WLL (Wireless Local Loop) system is targeted as a wireless communication system. The base station apparatus according to the first embodiment is connected to a PSTN network for a voice communication service and an internet for a data communication service as a wired network in order to provide a voice communication service and a data communication service to a terminal device. In consideration of the fact that the delay time is more important than the transmission rate for the voice communication service, the base station device multiplexes a plurality of terminal devices to be provided with the voice communication service based on CDMA, and further, one terminal device On the other hand, channels having the same transmission rate for the upper and lower lines are regularly assigned.

  On the other hand, unlike the voice communication service, the data communication service generally requires a higher transmission rate in the downlink channel than in the uplink channel, and data in the data communication service is randomly generated. The base station apparatus uses such characteristics in the data communication service to transmit a frame having one spreading code and defined in a predetermined period to a plurality of channels for the downlink in the data communication service. And allocating each channel to the terminal device generating the data to be transmitted (hereinafter, a signal transmitted through the channel allocated in time division for data communication is referred to as “burst”. Signal "). In this way, the total transmission capacity is increased by sharing a single downlink frame among a plurality of terminal devices. Here, the uplink channel in the data communication service is not considered. Furthermore, the base station apparatus transmits not only data but also a signal indicating an incoming call notification (hereinafter referred to as “incoming call information”) to the terminal apparatus using a burst signal.

  The burst signal is composed of header information at the beginning and a payload following the header information. Since the transmission rate per unit time in the payload and the data length included in the payload are variable, the header information includes the transmission rate information and the data length information, and notifies the terminal device of these information prior to the payload. It has a function. In addition, control information other than these, for example, the identification number of the terminal device that is the communication target of data and the incoming call information are included in the payload together with the data. Therefore, in order to receive data addressed to itself and receive incoming information in voice communication services, the terminal device must constantly receive and confirm the contents of all downlink burst signals. The efficiency of operation decreases.

  The header information is generated by repeating a plurality of bits constituting the transmission rate information and the data length information described above up to a predetermined number of times. For example, if the original information is “0” or “1”, it is repeated 8 times such as “00000000” and “11111111” (here, one bit in the original information is referred to as “block”). Here, since the number of bits of the original information subjected to the error correction processing is “30”, the header information obtained by repeating them eight times becomes “240” bits. On the other hand, the terminal device extracts the original information by adding each bit of the header information of the received signal eight times. For example, if “1” is input eight times in succession, the addition result “24” is derived, and if “0” is input eight times in succession, the addition result “0” is derived. “0” is extracted.

  More specifically, the original information “0” is converted into a “+1” value, and the original information “1” is converted into a “−1” value and transmitted. When the original information is “1”, the header information obtained by repeating the above “−1” value eight times is transmitted. Therefore, in general, the “−1” value is received eight times continuously. Is done. The result of adding the received values is “−8”, and since the reception result is a minus sign, the transmitted original information can be determined as “1”. On the other hand, when noise is superimposed on the transmission path, the level of the received signal corresponding to each bit of the header information fluctuates, so the sign of some of the 8 bits converted from the original information is inverted. There is also a case. However, since an 8-bit value is added in reception, the influence of the bit whose sign is inverted is reduced, the addition result becomes negative, and the original information can be correctly determined as “1”.

  When generating header information, the base station apparatus according to the present embodiment reduces the number of bit repetitions in one block from “8” times to “6” times, and inserts incoming information into the remaining “2” times. . That is, in the entire header information, incoming information of “60” bits, which is obtained by subtracting the number of bits “180” already generated to generate header information from the total number of bits “240”, is inserted. At that time, in order to make the terminal device that is already operating to perform an accurate process from the received signal, the presence / absence of the incoming call is set as the incoming call information, such as “01” or “10”. Define in combination. By inserting the incoming call information defined in this way into the block, the average value of the bit value per block becomes close to the case where the number of bit repetitions is “8”. Processing becomes possible. Furthermore, since the terminal device according to the present embodiment can extract the incoming information from the header information, if the incoming information in the header information indicates that there is no incoming, there is no need to receive a payload, so the efficiency of the receiving operation is improved. It can be improved.

  FIG. 1 illustrates a configuration of a communication system 100 according to the first embodiment. The communication system 100 includes a first terminal device 10a, a second terminal device 10b, a base station device 14, a PSTN gateway 18, a PSTN network 22, an Internet gateway 20, and the Internet 24, which are collectively referred to as the terminal device 10. 10a includes a first terminal antenna 12a, and the second terminal apparatus 10b includes a second terminal antenna 12b. The first terminal antenna 12a and the second terminal antenna 12b are collectively referred to as the terminal antenna 12.

  The terminal device 10 is connected to the base station device 14 via the terminal antenna 12. Here, since the WLL system is targeted as described above, the terminal device 10 is assumed to have a form such as an STB (Set Top Box). The terminal apparatus 10 is connected to the base station apparatus 14 and receives provision of a voice communication service and a data communication service.

  The base station device 14 performs wireless communication with the terminal device 10 via the base station antenna 16 and provides the terminal device 10 with a voice communication service and a data communication service. The voice communication service is connected to the PSTN network 22 via the PSTN gateway 18 and the data communication service is connected to the Internet 24 via the Internet gateway 20. The base station apparatus 14 allocates independent radio channels for the voice communication service and the data communication service to the terminal apparatus 10. The base station apparatus 14 allocates radio channels having the same transmission rate in the upper and lower lines to one terminal apparatus 10 for a voice communication service, and these radio channels are regularly allocated. And Further, the base station device 14 multiplexes a plurality of terminal devices 10 by CDMA.

  On the other hand, since the data communication service generally requires a transmission rate that is higher than the transmission rate of the uplink, only the downlink is described for the data communication service. Although the description of the uplink is omitted, it is assumed that data is transmitted at a transmission rate lower than that of the downlink by an arbitrary method. The base station device 14 uses a downlink data communication service (hereinafter, the downlink data communication service is also referred to as a “data communication service”, and does not distinguish between this and the “data communication service” when the uplink is included. For this reason, one spreading code is assigned, a frame defined in a predetermined period is divided into a plurality of burst signals, and the divided burst signals are assigned to a plurality of terminal apparatuses 10 respectively. . Therefore, the burst signal corresponds to a radio channel for data communication service.

  That is, in the data communication service, unlike the voice communication service, a burst signal is not allocated periodically to one terminal apparatus 10, and a burst signal is appropriately allocated to the terminal apparatus 10 that requires data transmission. Thus, one frame is shared by a plurality of terminal devices 10. Therefore, if one terminal apparatus 10 does not require data transmission, the base station apparatus 14 can allocate burst signals to other terminal apparatuses 10 and transmit data, so that frames can be used effectively and total data Transmission capacity can be improved. Here, since three spreading codes are used for the data communication service, three of the aforementioned frames are provided in parallel and multiplexed by CDMA. Since these three frames are independent of each other, only one frame, that is, a frame to which one spreading code is assigned will be described below.

  In addition to the illustration, other base station apparatuses 14 may be provided, and an authentication server or a billing server may be provided to provide these services. Omitted.

  FIG. 2 shows channel transitions in the communication system 100. Here, only radio channels necessary for the description of the present embodiment will be described. The base station apparatus 14 broadcasts a broadcast channel on the downlink (S10). The broadcast channel includes information regarding the base station device 14, and the terminal device 10 recognizes the presence of the connectable base station device 14 by receiving the broadcast channel. The terminal device 10 that requests connection to the base station device 14, that is, the terminal device 10 that requests execution of voice communication or data communication, transmits a random access channel to the base station device 14 on the uplink (S12). The base station apparatus 14 that has received the random access channel from the terminal apparatus 10 confirms the existence of the terminal apparatus 10 that requests connection. However, since the random access channel is transmitted by a plurality of terminal devices 10 that request connection to the base station device 14, the timing at which these plurality of terminal devices 10 transmit may be the same. However, the base station apparatus 14 does not receive it correctly. In such a case, the terminal device 10 transmits the random access channel again.

  When the base station apparatus 14 receives the random access channel from the terminal apparatus 10 and determines the connection of the terminal apparatus 10, that is, when the data communication or the voice communication with the terminal apparatus 10 is determined, the base station apparatus 14 acquires and displays on the downlink. The channel is transmitted (S14). The terminal device 10 that has received the acquired display channel transmits and receives a predetermined control signal for performing voice communication or data communication with the base station device 14, but the description thereof is omitted here. When the terminal device 10 performs data communication with the base station device 14, the base station device 14 transmits a downlink data channel to the terminal device 10 (S16). The data channel corresponds to the aforementioned burst signal, and is not transmitted periodically, but is transmitted as necessary, such as generation of data to be transmitted. On the other hand, when the terminal apparatus 10 performs voice communication with the base station apparatus 14, the base station apparatus 14 allocates a call channel for uplink and downlink to the terminal apparatus 10 (S16). The speech channel periodically transmits voice data between the terminal device 10 and the base station device 14.

  In this embodiment, the data channel transmits not only data communication but also predetermined control signals in voice communication. An example of the predetermined control signal is incoming call information. When the terminal apparatus 10 that is not connected to the base station apparatus 14 is notified of the incoming call through the data channel, the base station apparatus 14 is notified. The random access channel is transmitted, and as described above, the setting of the communication channel with the base station apparatus 14 is requested. Thus, the data channel and the communication channel also have a predetermined relationship.

  FIG. 3A shows the structure of the frame format. One frame is formed in 10 msec and further divided into 8 burst signals. Here, these are called the first burst signal to the eighth burst signal, and each is transmitted to a predetermined terminal apparatus 10. In addition, frames are continuously transmitted from the base station apparatus 14, and a frame arranged next after a predetermined frame is transmitted. FIG. 3B shows the configuration of the burst format. In the burst signal, header information is arranged at the head portion, followed by a payload. Although the header information is 120 symbols, a QPSK (Quadrature Phase Shift Keying) is used as a modulation method, so that a 240-bit signal can be transmitted.

  The payload is 1080 symbols. As the modulation method, any one of QPSK, 16QAM (Quadrature Amplitude Modulation), and 64QAM is selected, and error correction processing is also performed, but since the coding rate is also variable, the number of bits that can be transmitted is appropriately changed. To do. The data included in the payload includes information such as an identification number corresponding to the terminal device 10 to be communicated. Therefore, the terminal device 10 cannot confirm the destination of the data unless the payload contained in all burst signals is demodulated in principle. Further, the data included in the payload may be data for a plurality of terminal devices 10 as well as data for one terminal device 10. That is, one payload may be shared by a plurality of terminal apparatuses 10, but such scheduling is assumed to be performed by the base station apparatus 14. As described above, in the payload, the modulation scheme and the coding rate (hereinafter, these are integrated and referred to as “transmission rate”), and the data length is changed in units of burst signals. In general, since a terminal device that has received such a payload cannot demodulate data unless it recognizes the transmission rate and data length for the payload, such information is included in the header information.

  FIGS. 4A to 4C show the header information generation process of the communication system which is the premise of the first embodiment. FIG. 4A shows control information that is the basis of the header information, and shows 10-bit information. As described above, the control information includes information relating to the transmission rate and information relating to the data length, each of which is assigned 5 bits. In FIG. 4B, the control information that is the basis of FIG. 4A is subjected to Reed-Muller conversion, and the 10-bit control information is expanded to 30 bits.

  FIG. 4C shows header information generated by repeating each of the Reed-Muller converted data 8 times a predetermined number of times. Of the 30 bits of Reed-Muller converted data in FIG. 4B, 1 bit “a” is repeated 8 times to generate “1” to “8” in FIG. 4C. Is called a block. As a result of the above processing, 240-bit header information is generated. The terminal device that has received the header information performs the reverse process to extract the control information that is the basis. That is, addition is performed for each block of the header information, and a sum of 8-bit data is derived. Further, a hard decision is made by comparing the derived sum with a predetermined threshold value, and the control information is derived by inversely transforming the result of the hard decision by Reed-Muller. The hard decision described above may be a soft decision.

  FIG. 5 shows a configuration of the transmission unit 30 in the communication system 100. Here, since the downlink data channel is an object of explanation, it is assumed that the transmission unit 30 in FIG. 5 is included in the base station apparatus 14 in FIG. The transmission unit 30 includes an interface unit 32, an encoding unit 34, a modulation unit 36, a signal generation unit 38, a spreading unit 40, a radio unit 42, a transmission rate control unit 44, a data length acquisition unit 46, a header generation unit 48, and an incoming call notification. Part 50 and control part 52.

  The interface unit 32 inputs data to be transmitted, control information corresponding to the data, and incoming information to the terminal device 10 to be communicated. These input signals are output to the encoding unit 34, the transmission rate control unit 44, the data length acquisition unit 46, and the incoming call notification unit 50. The encoding unit 34 performs error correction encoding on the data received from the interface unit 32. The data received from the interface unit 32 is to be stored in the payload in the burst signal of FIG. Here, a Turbo code is assumed as the error correction code, but other convolutional coding may be used. Further, the encoding rate of the Turbo code is assumed to be specified by the transmission rate control unit 44 described later, and encoding is executed based on the specified encoding rate, for example, R = 1/3.

  The modulation unit 36 modulates the error correction encoded data. As described above, the modulation method is selected from QPSK, 16QAM, and 64QAM based on an instruction from the transmission rate control unit 44. The transmission rate control unit 44 receives information on the transmission rate from the control unit 32 from the interface unit 32, instructs the encoding unit 34 on the coding rate, and instructs the modulation unit 36 on the modulation scheme based on the information. Information regarding the accepted transmission rate is output to the header generation unit 48. The information regarding the transmission rate is 5 bits as described above. The data length acquisition unit 46 receives information related to the data length of the control information from the interface unit 32 and outputs the information to the header generation unit 48. The information regarding the data length is 5 bits as described above.

  The incoming notification unit 50 receives incoming information from the interface unit 32 and outputs it to the header generation unit 48. The incoming call information is indicated by 1 bit, and “1” indicates that there is an incoming call and “0” indicates that there is no incoming call. Here, when the incoming call information indicates that there is an incoming call, it is assumed that the data to be processed by the corresponding encoding unit 34 includes the identification number of the terminal device 10 corresponding to the incoming call. The header generation unit 48 receives information about the transmission rate from the transmission rate control unit 44, receives information about the data length from the data length acquisition unit 46, and receives incoming call information from the incoming call notification unit 50. Further, based on these, header information included in the burst signal of FIG. 3B is generated. 6A to 6C show a header information generation process in the header generation unit 48. FIG. 6 (a) is the same as FIG. 4 (b), and 10 bits of information on the transmission rate and information on the data length received from the transmission rate control unit 44 and the data length acquisition unit 46 are Reed-Muller converted. Data, 30-bit data.

  By skipping FIG. 6B, FIG. 6C shows data obtained by converting the incoming call information received from the incoming call notification unit 50. Here, “1” indicating that there is an incoming call in the incoming information is converted to “10”, and “0” indicating that there is no incoming call is converted to “01”. That is, the input bit value is converted into a value obtained by combining the input bit value and a value obtained by inverting the input bit value. The reason for conversion according to such rules will be described later.

  FIG. 6B shows the header information generated by the header generation unit 48. Each value of the Reed-Muller converted data is repeated as described with reference to FIG. 4, but the number of repetitions is assumed to be six times less than the predetermined number of repetitions of eight. That is, the 1-bit “a” in FIG. 6A is repeated 6 times to convert from “1” in FIG. 6B to “6”. Since the number of repetitions specified in advance is 8, one block should be composed of 8 bits. However, since the number of repetitions is 6 here, 2 bits are not filled. Furthermore, since the header information is composed of 30 blocks, 60 bits are not filled as a whole.

  Therefore, as described in FIG. 6B, 2 bits of the converted incoming call information are inserted into one block, and the same value is inserted into 30 blocks. Here, since the converted incoming call information is “10” or “01”, the average value of the block is equal to each value of the Reed-Muller converted data corresponding thereto. That is, when one value of the Reed-Muller converted data is “1”, the value repeated six times becomes “111111”. Furthermore, even if “10” or “01” is inserted into this block, the average value of the block is close to one value “1” of the Reed-Muller converted data. That is, the average value when “11” is inserted is “1”, but may be “00”. In this case, the average value is “0.75”. On the other hand, if “10” or “01” is inserted as in this embodiment, the average value becomes “0.875”, which is closer to one value “1”. The conversion of incoming information is defined so that it can be accurately processed even in a terminal device that is already in operation, that is, a terminal device designed to process the header information shown in FIG.

  That is, when “10” or “01” is inserted as the converted incoming call information, these values are transmitted after being converted into “−1, +1” or “+1, −1” as described above. Therefore, in reception, when the received value is added eight times, the inserted values, that is, “−1, +1” or “+1, −1” cancel each other. As a result, it is considered that the remaining 6-bit addition result is not influenced so as to invert the sign, so that the decoding can be correctly performed based on the remaining 6-bit addition result code value. If converted in this way, the average value of the blocks becomes equal to one value of the data subjected to Reed-Muller conversion.

  Returning to FIG. Further, the header generation unit 48 performs QPSK modulation on the header information generated as shown in FIG. The signal generation unit 38 generates a burst signal based on the signal input from the modulation unit 36 and the header information input from the header generation unit 48. That is, the header information is arranged at the head portion, and subsequently, the payload that is the signal input from the modulation unit 36 is arranged. The spreading unit 40 spreads the burst signal, and the radio unit 42 performs DA conversion, orthogonal modulation, frequency conversion, and amplification processing on the spread signal, and then outputs the signal as a radio signal via the base station antenna 16. The control unit 52 controls the timing of the transmission unit 30 and the like.

  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.

  FIG. 7 shows a configuration of the receiving unit 60 in the communication system 100. Here, since the downlink data channel is the subject of the description, it is assumed that the receiving unit 60 of FIG. 7 is included in the terminal apparatus 10 of FIG. The receiving unit 60 includes a radio unit 62, a despreading unit 64, an extracting unit 66, a demodulating unit 68, a decoding unit 70, an interface unit 72, a control information deriving unit 74, a transmission rate control unit 76, a data length obtaining unit 78, and a determining unit. 80 and a control unit 82.

  The radio unit 62 receives a burst signal transmitted from the base station apparatus 14 (not shown) via the first terminal antenna 12a. The received burst signal is generated by the transmission unit 30 in FIG. Here, it is assumed that the receiving unit 60 is not executing data communication and is waiting for an incoming call for voice communication. The despreading unit 64 despreads the received burst signal. The extraction unit 66 extracts header information from the despread burst signal and outputs the header information to the control information deriving unit 74. The payload of the burst signal is output to the demodulator 68.

  The control information deriving unit 74 performs Reed-Muller conversion for each block included in the header information extracted by the extracting unit 66 by performing addition processing inside the block for a predetermined number of repetitions of 8 times. Control information is derived. That is, as described above, since one block includes 8-bit data, the sum of these is calculated, and compared with a predetermined threshold value, one of the control information subjected to Reed-Muller conversion. Deriving bits of Since the header information is composed of 30 blocks, a 30-bit signal is derived. Further, Reed-Muller inverse transformation is performed on the derived 30-bit signal to derive and output control information.

  The determination unit 80 extracts the converted 2-bit incoming information from the blocks included in the header information extracted by the extraction unit 66, and further performs the same processing for each of the 30 blocks included in the header information. Finally, 60-bit incoming information is extracted. Further, based on the rule of conversion of the incoming information from 1 bit to 2 bits in the transmission unit 30 described above, reverse processing is performed to derive 1-bit incoming information. For example, an average value of 30 bits corresponding to the upper value of the two bits of the incoming information is obtained, and the upper value is determined by comparing the average value with a predetermined threshold value. Among them, an average value of 30 bits corresponding to the lower value is obtained, and the lower value is determined by comparing the average value with a predetermined threshold value.

  If the derived 1-bit value is “1”, it indicates that there is an incoming call as described above. Therefore, it is necessary to demodulate the payload of the burst signal, and the transmission rate control unit 76 is instructed to execute it. On the other hand, if the derived 1-bit value is “0”, it indicates that there is no incoming call as described above. Therefore, demodulation of the payload of the burst signal is unnecessary, and no instruction is given to the transmission rate control unit 76 for execution. .

  The transmission rate control unit 76 inputs the information regarding the transmission rate among the control information derived by the control information deriving unit 74, and further receives the demodulation instruction from the determining unit 80, and determines the modulation method of the payload. 68 and outputs the payload coding rate to the decoding unit 70. The demodulator 68 demodulates the payload based on the modulation scheme information instructed by the transmission rate controller 76. The decoding unit 70 decodes the demodulated payload based on the coding rate information instructed by the transmission rate control unit 76. The data length acquisition unit 78 inputs information on the data length among the control information derived by the control information deriving unit 74, and further receives information on the data length when receiving an instruction for demodulation from the determination unit 80. 72.

  The interface unit 72 receives the decrypted data from the decryption unit 70 and accepts information about the data length from the data length acquisition unit 78. The interface unit 72 confirms identification information and the like included in the decrypted data, and outputs data if it is determined that it corresponds to the data transmission destination. Further, the terminal device 10 determines that the incoming call has been notified from the base station device 14, and executes the process for setting the communication channel with the base station device 14 as described above. On the other hand, the interface unit 72 confirms the identification information and the like included in the decrypted data, and discards the data if it is determined not to correspond to the data transmission destination. The control unit 82 controls the timing of the receiving unit 60 and the like.

  FIG. 8 is a flowchart showing the procedure of the reception process. It is assumed that the receiving unit 60 is not performing data communication as in the description of FIG. 7 and is waiting for an incoming call for voice communication. The despreading unit 64 despreads the received signal (S20). The extraction unit 66 extracts header information from the despread signal (S22). The control information deriving unit 74 extracts control information and incoming information from the header information (S24). When the extracted incoming information indicates that there is an incoming call (Y in S26), the determination unit 80 notifies the transmission rate control unit 76 and the data length acquisition unit 78 to that effect. If notified, the demodulator 68 and the decoder 70 demodulate and decode the payload, that is, the data included in the burst signal, based on the transmission rate information included in the control information (S28). When the identification number included in the decrypted data corresponds to its own identification number (Y in S30), the interface unit 72 starts a call process with the base station device 14 (S32). . Here, the terminal device 10 executes a process for establishing a call channel with the base station apparatus 14 prior to the call process. On the other hand, if the extracted incoming information does not indicate that there is an incoming call (N in S26), if the identification number included in the decrypted data does not correspond to its own identification number (N in S30), the process ends.

  FIGS. 9A and 9B show the difference in frame processing according to the procedure of FIG. 8 and the communication system that is the premise of the first embodiment. These are assumed to be in a state in which data communication is not executed as in the description with reference to FIGS. 7 and 8 and an incoming call for voice communication is awaited. FIG. 9A illustrates a reception process in the communication system that is the premise of the first embodiment. The figure shows a frame that is repeatedly transmitted. Further, as shown in FIG. 3, one frame includes eight burst signals, and the burst signal includes header information and a payload. Since the incoming information and the identification number are included in the payload and cannot be confirmed only by the header information, the receiving apparatus demodulates all the header information and the payload constituting all the burst signals included in the frame. Therefore, as shown in the lower side of FIG. 9A, the receiving apparatus must operate in all sections of a frame that is repeatedly transmitted, thereby increasing power consumption.

  FIG. 9B illustrates a reception process in the reception unit 60 according to the first embodiment. Here, it is assumed that the base station apparatus 14 transmits incoming information once per frame. As described above, since the incoming information is also included in the header information, the receiving unit 60 is activated once per frame to check whether the incoming information included in the header information indicates that there is an incoming call. If there is no incoming call, as shown in the lower side of FIG. 9B, the operation is stopped over the remaining portion of the corresponding one frame. On the other hand, if there is an incoming call, the receiving unit 60 demodulates and decodes the payload, and confirms the identification number included in the decoded payload. That is, as shown in the lower side of FIG. 9B, the operation is performed at least in the corresponding burst signal section. Furthermore, if the confirmed identification number corresponds to its own identification number, the terminal device 10 including the receiving unit 60 executes processing for establishing a communication channel with the base station device 14. On the other hand, if the confirmed identification number does not correspond to its own identification number, the terminal device 10 including the receiving unit 60 returns to the power saving mode again. As described above, according to the first embodiment, it is only necessary to operate for a section necessary for confirmation of incoming calls, so that power consumption can be reduced.

  According to the embodiment of the present invention, since the incoming information is included in the header information of the burst signal, the receiving device only needs to execute an operation for confirming only the incoming information included in the header information, and the efficiency of the receiving operation. Can be improved. Moreover, power consumption can be reduced. Also, since the incoming information to be inserted into the header information is inserted after converting the average value of the control information repeated a predetermined number of times into a value that does not change, compatibility with an already operating receiving apparatus can be maintained. .

(Example 2)
As in the first embodiment, the second embodiment of the present invention is directed to a wireless communication system in which a plurality of terminal devices communicate with a base station device, particularly a WLL system. The base station apparatus according to Embodiment 1 uses the structure of the burst signal in the data channel to insert incoming information into the header information of the burst signal and transmit it to the terminal apparatus. Furthermore, the incoming information to be inserted into the header information is converted in advance based on regularity so that the header information can be accurately processed even when a terminal device already operating receives the burst signal. In other words, the terminal device waiting for incoming information can shift to the power saving mode by the processing as described above, reduce power consumption, and maintain compatibility with an already operating WLL system.

  The base station apparatus according to the second embodiment inserts predetermined information into the header information of the burst signal as in the first embodiment, but is not the incoming call information but the identification number of the terminal apparatus to be communicated. As described above, the identification number is included in the payload of the burst signal, and generally has a certain bit length. However, since the bit length of the data that can be inserted into the header information of the burst signal is smaller than the bit length of the data included in the payload, when the identification number is included in the header information, it has a function of the identification number and the identification number It is inserted after being converted into a simpler number (hereinafter referred to as “simple number”). Therefore, since the terminal device can confirm that the data to be received is not included in the burst signal only by receiving the header information, if the data to be received is not included in the burst signal, the demodulation of the payload can be omitted. The operating efficiency of reception can be improved.

  Furthermore, if data for a plurality of terminal devices is included in one payload, the use efficiency of burst signals is improved and the data transmission capacity is also improved. However, since the transmission rate of the payload is variable and there is only one type of transmission rate information included in the header information to indicate the transmission rate, the data for a plurality of terminal devices included in the payload has different transmission rates. If so, it becomes impossible to indicate them with header information. Therefore, the base station apparatus according to the present embodiment performs control so that data for terminal apparatuses having the same transmission rate is combined into one payload. Therefore, the base station apparatus can transmit data efficiently.

  FIG. 10 illustrates a configuration of the transmission unit 30 according to the second embodiment. The allocation unit 90 and the storage unit 92 are different from the transmission unit 30 of FIG. Also, here, since the downlink data channel is an object of explanation, it is assumed that the transmission unit 30 in FIG. 10 is included in the base station apparatus 14 in FIG.

  The preliminary operation will be described before the transmission unit 30 is described. The base station apparatus 14 receives a random access channel from the terminal apparatus 10 before setting the data channel. When receiving the random access channel, the base station apparatus 14 measures an SN (Signal to Noise) ratio of the random access channel received by a measurement unit (not shown). Note that the S / N ratio may be an arbitrary measurement amount indicating signal quality such as SNIR or signal intensity. In addition to the data to be transmitted and the control information corresponding to the data, the interface unit 32 inputs the S / N ratio measured before transmitting the data channel. The input S / N ratio is output to the assigning unit 90.

  The storage unit 92 preliminarily defines a plurality of groups for classifying the terminal devices 10 to which data should be transmitted based on the measured S / N ratio, and a plurality of groups that can be assigned to each number and one group. The information regarding the simple number is stored in advance. FIG. 11 shows the correspondence between the simple numbers stored in the storage unit 92 and the group numbers. The group numbers “1” to “4” in the figure are four groups into which the terminal device 10 is to be classified, and the allocating unit 90 compares the measured SN ratio with a predetermined threshold value and compares these four groups. It shall be classified as one of the following. Here, it is assumed that “4” is the group with the highest SN ratio among the four group numbers, and “1” is the group with the lowest SN ratio.

  Since the SN ratio generally corresponds to the transmission rate, the group number “4” corresponds to the highest transmission rate, and the group number “1” corresponds to the lowest transmission rate. Further, FIG. 11 also shows simplified numbers corresponding to the respective groups. That is, when the assignment to the group number “1” is determined based on the measured S / N ratio, any one of the simple numbers “1” to “8” is assigned to the terminal device 10. Similarly, any of the simple numbers “9” to “16” is assigned to the group number “2”, and any of the simple numbers “17” to “24” is assigned to the group number “3”. A simple number “25” to “32” is assigned to the group number “4”.

  Returning to FIG. The allocating unit 90 determines the data transmission rate for the terminal device 10 to which data should be transmitted based on the S / N ratio measured before transmitting the data channel. Furthermore, one of the group numbers stored in the storage unit 92 is assigned to the terminal device 10 based on the transmission rate, and a simple number corresponding to the assigned group number is assigned. Here, the simple number is prepared with 5 bits from “1” to “32”, and if the identification number for identifying the terminal device 10 is more than that, the simple number is a simpler number than the identification number. is there. The simple numbers are assigned in order from the smallest number among the plurality of simple numbers corresponding to the corresponding group. Taking FIG. 11 as an example, the simple number “1” is assigned to the first terminal device 10 for the group with the group number “1”, and the subsequent terminal device 10 is incremented from “2” in order. Give a number. Further, when the simple number becomes “8”, the already assigned simple number “1” is assigned to the new terminal device 10 so as to overlap.

  That is, one simple number “1” is assigned to a plurality of terminal devices 10. When the two terminal devices 10 to which the same simple number is assigned receive the burst signal and the header information includes the simple number “1”, the two terminal devices 10 both demodulate and decode the payload, The identification number included in the is confirmed, and it is confirmed whether it corresponds to its own identification number. Eventually, since the terminal device 10 that should receive data is identified by the identification number, it can be said that there is no problem with overlapping simple numbers. Further, since the transmission rates for the terminal devices 10 to which the same simple number is assigned are the same, if the data for the terminal device 10 to which the same simple number is assigned is included in the same payload, the data transmission efficiency Will improve. Note that the number of terminal apparatuses 10 to which one simple number is assigned may be limited to, for example, “4 units”.

  FIG. 12 is a flowchart showing a simple number assignment procedure performed by the assigning unit 90. The base station apparatus 14 measures the SN ratio of the random access channel received from the terminal apparatus 10 in a measurement unit (not shown) (S40). The assigning unit 90 determines the group number X based on the measured S / N ratio (S42). Further, the current simple number already assigned with the group number X is acquired from the storage unit 92 (S44). If the acquired simple number is 8X (Y in S46), the assigning unit 90 assigns the simple number “8 (X−1) +1” (S48). On the other hand, if the acquired simple number is not 8X (N in S46), the assigning unit 90 assigns a simple number obtained by incrementing the acquired simple number (S50). The storage unit 92 stores the assigned simple number (S52). Basically, the above processing is executed when a data channel is set for a predetermined terminal apparatus 10, and once the data channel is set, the same simple number is used for one terminal apparatus 10. To do.

  Returning to FIG. The header generation unit 48 receives information about the transmission rate from the transmission rate control unit 44, receives information about the data length from the data length acquisition unit 46, and receives a simple number from the allocation unit 90. Further, based on these, header information included in the burst signal of FIG. 3B is generated. Since the generation method is the same as that shown in FIGS. 6A to 6C in the first embodiment, the details are omitted. As shown in FIG. 6B, when each value of the Reed-Muller converted data is repeated 6 times less than the predetermined number of repetitions of 8 times, the entire header information is not filled with 60 bits. It is in. Further, as shown in FIG. 6C, one bit is changed to 2 bits based on a rule that does not change the average value of the block, so that a 30-bit simple number can be inserted into the header information. Here, the conversion from 1 bit to 2 bits is performed so that “0” becomes “01” so that “1” becomes “10”.

  FIG. 13 shows a configuration of a simple number to be inserted by the header generation unit 48. Although it is composed of 30 bits, it is assumed that the number of data that can be multiplexed with the payload of one burst signal is “5”, and five simple numbers can be inserted into one header information. As shown in the figure, one simple number is composed of “5” bits, and since a parity bit of “1” bits is further added, it is composed of 6 bits per simple number. Thus, the simple number composed of 30 bits converts each bit from 1 bit to 2 bits to become 60-bit data. Each of them is divided into a plurality of parts with 2 bits as one unit and then inserted into 30 blocks.

  Furthermore, when a plurality of simple numbers are respectively inserted into the header information, the plurality of simple numbers to be inserted may be arranged based on a predetermined regularity, for example, ascending order. For example, if the simple numbers are arranged in the order of “1”, “2”, and “3”, the terminal device 10 to which the simple number “2” is assigned extracts the simple number “2” when extracting the simple number from the header information. Even if it fails, if simple numbers “1” and “3”, which are simple numbers before and after that, can be extracted, it can be estimated that the simple number “2” is included therefrom. Returning to FIG. The signal generation unit 38 generates a burst signal by combining data to the terminal device 10 having the same transmission rate into one payload.

  FIG. 14 illustrates a configuration of the receiving unit 60 according to the second embodiment. The simplified number deriving unit 94, the determining unit 96, and the corresponding unit 98 are different from the receiving unit 60 of FIG. Also here, since the downlink data channel is the subject of the description, it is assumed that the receiving unit 60 in FIG. 40 is included in the terminal apparatus 10 in FIG.

  The simple number derivation unit 94 extracts 60-bit information corresponding to the simple number from the blocks included in the header information extracted by the extraction unit 66, and further, 1 bit of the incoming information in the transmission unit 30 described above. Based on the rule of conversion from 1 to 2 bits, the reverse process is performed to derive a 30-bit simple number. The determination unit 96 divides the derived simple number into five simple numbers, and determines whether one of them corresponds to its own simple number. If it corresponds to its own simple number, there is a possibility that there is data to be received in the payload, so the execution is instructed to the transmission rate control unit 76 and the data length acquisition unit 78. On the other hand, if it does not correspond to its own simple number, there is no data to be received in the payload, so execution is not instructed to the transmission rate control unit 76 and the data length acquisition unit 78.

  In addition, when a data channel is set up with the base station apparatus 14, since a simple number is not notified from the base station apparatus 14, its own simple number is unknown. For this purpose, first, the identification number is extracted by demodulating and decoding all burst signals, and the correspondence unit 98 associates the relationship between the identification number corresponding to itself and the simple number included in the header information at that time, It recognizes the simple number assigned to itself and stores it for use in subsequent processing.

  FIG. 15 is a flowchart showing the procedure of the reception process. The receiving unit 60 receives the burst signal, but has not acquired a simple number corresponding to itself (N in S60), the demodulation unit 68 and the decoding unit 70 demodulate the payload of the received burst signal. And it decodes (S62). The interface unit 72 confirms whether or not its own identification number is included in the identification number included in the decrypted payload. When it corresponds to its own identification number (Y in S64), the correspondence unit 98 stores the simple number at that time in association with it (S66). Further, the receiving unit 60 processes the received data (S68). On the other hand, when it does not correspond to its own identification number (N in S64), a continuous burst signal is received and the same processing is repeatedly executed.

  If the receiving unit 60 has already acquired a simple number corresponding to itself (Y in S60), the extracting unit 66 extracts header information from the received burst signal (S70). If the simple number derived from the header information by the simple number deriving unit 94 is determined by the determining unit 96 to correspond to its own simple number (Y in S72), the demodulating unit 68 and the decoding unit 70 demodulate and decode the data. (S74). On the other hand, if the determination unit 96 does not determine that it corresponds to its own simple number (N in S72), the demodulation unit 68 and the decoding unit 70 do not demodulate and decode data. If the identification number included in the decrypted data corresponds to its own identification number (Y in S76), the interface unit 72 processes the data (S80). However,. If the identification number included in the decoded data does not correspond to its own identification number (N in S76), the interface unit 72 discards the decoded data (S78).

  According to the embodiment of the present invention, since the simple simple number for identifying the terminal device is included in the header information of the burst signal, the receiving device should execute at least the operation for confirming the simple number included in the header information. Since it is good, the efficiency of the receiving operation can be improved. Moreover, power consumption can be reduced. In addition, since the simple number to be inserted into the header information is inserted after converting the average value of the control information repeated a predetermined number of times into a value that does not change, compatibility with an already operating receiving apparatus can be maintained. .

(Example 3)
As in the first and second embodiments, the third embodiment of the present invention targets a wireless communication system in which a plurality of terminal devices communicate with a base station device, particularly a WLL system. The base station apparatus according to Embodiments 1 and 2 uses the structure of the burst signal in the data channel to insert incoming information or a simple number into the header information of the burst signal and transmit it to the terminal apparatus. Furthermore, incoming information and simple numbers inserted into the header information are converted in advance based on regularity that allows the header information to be accurately processed even when a terminal device that is already in operation receives the burst signal. The base station apparatus according to the third embodiment corresponds to a combination of the first and second embodiments, and inserts incoming information into the header information of the burst signal and also inserts a simple number and transmits it to the terminal apparatus.

  The transmission unit 30 according to the third embodiment corresponds to a combination of the transmission unit 30 illustrated in FIG. 5 and the transmission unit 30 illustrated in FIG. 10, and the reception unit 60 according to the third embodiment receives the reception illustrated in FIG. Since this corresponds to a combination of the unit 60 and the receiving unit 60 shown in FIG. 14, description thereof is omitted.

  In the transmission unit 30, the header generation unit 48 inserts incoming information and an identification number into the header information. FIG. 16 illustrates a configuration of a simple number and incoming information to be inserted into the header information according to the third embodiment. FIG. 16 is shown corresponding to FIG. As shown in the figure, four simple numbers from the first simple number to the fourth simple number and one incoming information are included. Here, the incoming information may be formed as 6-bit information by repeating the 1-bit incoming information six times, or the 6-bit is divided into a plurality of parts, depending on the number of divided parts. Incoming call information for the terminal device 10 may be included. In the receiving unit 60, the determining unit 80 and the simple number deriving unit 94 derive the simple number and the incoming call information included in the extracted header information.

  Furthermore, a modification of the third embodiment described above will be described. The modified example is a WLL system that includes a simple number and incoming call information in header information as in the third embodiment, and further controls to improve the efficiency of the receiving operation in the terminal device included in the WLL system. . Here, the base station device 14 classifies the plurality of terminal devices 10 into a plurality of groups based on an identification number set in advance in the terminal device 10, for example, the telephone number of the terminal device 10 (the group here is Although it may be provided separately from the group described in the second embodiment, it is simply referred to as “group” for the sake of convenience, and is not distinguished from the group in the second embodiment). That is, 64 groups are provided with the upper 6 bits among the plurality of bits constituting the identification number of the terminal device 10 as the group number. Furthermore, 32 kinds of simple numbers are provided with the lower 5 bits of the plurality of bits constituting the identification number of the terminal device 10 as the simple numbers in one group number. These allocation processes are performed by the allocation unit 90 and the storage unit 92 in the transmission unit 30 of FIG.

  FIG. 17 illustrates frame allocation according to a modification of the third embodiment. As shown in the figure, the above-described frame constitutes a multiframe with 64 frames as one unit, and further constitutes a superframe with four multiframes as one unit. The 64 frames constituting one multiframe are respectively assigned to 64 groups provided in advance. Although not shown, it is assumed that a frame assigned to one group is constituted by a burst signal to be assigned to the terminal device 10 to which the simple number included in the group is assigned. With the above configuration, four frames are assigned to one group for one superframe.

  For example, when the base station device 14 receives an incoming call to the terminal device 10 with the simple number “10” of the group number “2”, the header generation unit 48 includes the frame number assigned with the group number “2”. Incoming information indicating that there is an incoming call is inserted into the header information included in the burst signal. Furthermore, the header generation unit 48 inserts the simple number “10” into the header information included in the burst signal in the frame to which the group number “2” is assigned.

  The determination unit 96 of the reception unit 60 manages the timing at which a frame of a group to which the group should belong is transmitted. Note that the absolute value of the timing at which the frame should be transmitted, for example, the timing at the beginning of the super frame, is obtained by receiving the above-described broadcast channel. The determination unit 96 receives a burst signal at a timing at which a frame of the corresponding group is to be transmitted, and checks whether there is a simple number corresponding to itself among the simple numbers included in the header information of the burst signal.

  When there is a simple number corresponding to itself, the incoming call notification unit 50 confirms the incoming call information. If the incoming call information indicates that there is an incoming call, it instructs the demodulation unit 68 and the decoding unit 70 to perform demodulation and decoding. Further, if the identification number included in the payload of the interface unit 72 corresponds to its own identification number, the terminal device 10 including the receiving unit 60 performs processing for establishing a call channel with the base station device 14. Execute. On the other hand, if the determination unit 96 does not confirm the presence of the corresponding simple number, or if the incoming call information confirmed by the incoming call notification unit 50 indicates that there is no incoming call, the demodulation unit 68 and the decoding unit 70 perform demodulation and decoding. Is set to the power saving mode until the next frame is to be transmitted.

  According to the embodiment of the present invention, since the incoming information and the simple number are inserted into the header information included in the burst signal, the receiving apparatus corresponds to the combination of the simple number included in the header information and the information indicated by the incoming information. In this case, the entire burst signal may be processed, and the efficiency of the receiving operation can be improved. In addition, since the combination of the incoming call number and the simple number is included in the header information, unnecessary operation of the terminal device can be prevented. Furthermore, since a predetermined group is defined according to the identification number of the terminal device and frames are regularly assigned to the group, the receiving operation by the terminal device can be further improved.

  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.

  In Embodiments 1 to 3 of the present invention, the WLL system is targeted as the communication system 100. According to this modification, the present invention can be applied to various communication systems 100. That is, the base station apparatus 14 constituting the communication system 100 allocates a predetermined channel to the terminal apparatus 10, and the header information of the burst signal is repeatedly formed a predetermined number of times as in the first to third embodiments. Good.

  In Example 2 of this invention, the allocation part 90 of the transmission part 30 provided the simple number with respect to the terminal device 10 based on the measured S / N ratio. However, not limited to this, for example, the assigning unit 90 may define a predetermined number as a common number among the simple numbers. At this time, if the simple number included in the received burst signal is a common number, the receiving unit 60 demodulates the parse and the signal payload. According to this modification, the base station device 14 can provide a common broadcast service to the plurality of terminal devices 10. That is, it is only necessary that a common rule regarding the simple number is provided between the base station device 14 and the terminal device 10.

  A configuration in which the first to third embodiments of the present invention are arbitrarily combined is also effective. According to this modification, the effect obtained by combining the first to third embodiments can be obtained.

The features of the invention described in Examples 1 to 3 may be defined by the following items.
(Item 2-1)
A data input unit for inputting data to be transmitted to a predetermined receiving device;
A control information input unit for inputting control information corresponding to the input data;
A simple number for identifying a receiving device separately from the identification number of the receiving device included in the input data, a simple number giving unit for giving a simple number simpler than the identification number;
A header information generation unit that generates the header information by repeating the input control information a number of times less than a plurality of predetermined repetitions;
In accordance with the difference between the predetermined number of repetitions and the number of repetitions of the control information, a simple number insertion unit that inserts the assigned simple number into the generated header information;
Based on the header information into which the simple number is inserted and the input data, a burst signal generation unit that generates a burst signal;
A transmitter for transmitting the generated burst signal to the receiving device;
A transmission device comprising:

(Item 2-2)
The data to be transmitted to each of the plurality of receiving devices can be variably set to the transmission rate per unit time at the time of transmission, depending on the transmission rate per unit time of the data to be transmitted to each of the plurality of receiving devices. A storage unit preliminarily storing information on group numbers corresponding to a plurality of simple numbers that can be assigned to each of the plurality of groups, wherein a plurality of groups to which the plurality of receiving devices are to be classified are defined in advance;
An allocation unit that assigns a group number to the receiving device based on a transmission rate per unit time of data to be transmitted to the predetermined receiving device;
The simple number assigning unit assigns one of a plurality of simple numbers corresponding to the assigned group number to the receiving device based on the stored information (Item 2-1). ).

(Item 2-3)
The control information input to the control information input unit is composed of a plurality of bits,
The simple number assigned by the simple number assigning unit is composed of a plurality of bits,
The header information generation unit repeats each of a plurality of bits constituting the control information a number of times less than a plurality of predetermined repetition times,
The simple number insertion unit is configured so that the number of repetitions is less than the predetermined number of repetitions for the block in which each of the plurality of bits constituting the control information is a unit. Until each of a plurality of prescribed repetition counts, instead of each of the plurality of bits constituting the control information, the respective values obtained by converting the plurality of bits constituting the simple number are inserted while being divided, and the simple Each value obtained by converting a plurality of bits constituting a number is generated such that an average value of each block is close to each value of a plurality of bits constituting the control information (item) 2-1) or the transmission device according to (Item 2-2).

(Item 2-4)
The simple number insertion unit converts each of a plurality of bits constituting the simple number into a value obtained by inverting each value and a value obtained by combining the values (Item 2-3). ).

(Item 2-5)
The data input unit inputs data to be transmitted to a plurality of receiving devices,
The simple number assigning unit assigns a plurality of simple numbers to a plurality of receiving devices to which the input data is to be transmitted,
The simple number insertion unit inserts the plurality of assigned simple numbers into the generated header information,
The burst signal generation unit generates one burst signal based on the header information into which the plurality of simple numbers are inserted and the input data, respectively (Item 2-1) to (Item 2- 4) The transmission apparatus according to any one of the above.

(Item 2-6)
The simple number insertion unit arranges a plurality of simple numbers to be inserted based on a predetermined regularity when the plurality of assigned simple numbers are respectively inserted into the generated header information ( Item 2-5).

(Item 2-7)
The data to be transmitted to each of the plurality of receiving devices input to the data input unit can be variably set the transmission rate per unit time when transmitting,
The burst signal generation unit includes, in one burst signal, data to be transmitted to each of the plurality of receiving devices when the transmission rate per unit time of the data to be transmitted to each of the plurality of receiving devices is the same. The transmission device according to (Item 2-5), which is characterized.

(Item 2-8)
Data to be transmitted to a predetermined receiving device and control information corresponding to the data are input, and a simple number for identifying the receiving device separately from the identification number of the receiving device included in the data, A simple number that is simpler than the identification number is given, and the input control information is repeated a number of times that is less than a plurality of predefined repetition counts, and header information is generated, while the plurality of predefined repetition counts and Depending on the difference in the number of times the control information has been repeated, the assigned simple number is inserted into the generated header information, and a burst signal is generated based on the header information with the simple number inserted and the input data A transmission method characterized by:

(Item 2-9)
A burst signal composed of data, control information corresponding to the data, and a simple simple number for identifying the receiving device separately from the identification number of the receiving device included in the data, the control information Is repeated a number of times less than a plurality of predetermined repetition times, and the burst number is inserted according to the difference between the predetermined number of repetitions and the number of repetitions of the control information. A receiving unit for receiving;
An extraction unit that extracts header information corresponding to the control information and the simple number from the received burst signal;
A derivation unit for deriving control information and a simple number by performing processing according to the plurality of predetermined repetition times for the extracted header information;
If the derived simple number corresponds to its own simple number, a determination unit that determines the processing content of the data based on the derived control information;
A processing unit for processing the data according to the processing content of the determined data;
A receiving apparatus comprising:

(Item 2-10)
The control information included in the burst signal received by the receiving unit is configured by a plurality of bits, and the control information is configured in a block in which each of the plurality of bits configuring the control information is a unit. Each of the plurality of bits is repeated a number of times smaller than a predetermined number of repetitions, and the simple number is composed of a plurality of bits, and each of the bits obtained by converting the plurality of bits constituting the simple number A value is inserted in each block,
The derivation unit derives control information for each of the blocks included in the extracted header information by performing addition processing inside the block for a plurality of predetermined repetition times, and obtains a simple number. Utilizing the fact that the conversion performed on each of the plurality of configured bits is based on regularity in which the average value of each of the blocks is close to the value of each of the plurality of bits configuring the control signal, The receiving device according to (Item 2-9), wherein a simple number is derived from each of the items.

(Item 2-11)
The derivation unit converts a value obtained by inverting the respective value and the respective value from each of the plurality of bits constituting the simple number, with respect to each of the plurality of bits constituting the simple number. The receiving apparatus according to (Item 2-10), wherein a simple number is derived from each of the blocks by using the conversion to a combined value.

(Item 2-12)
When the deriving unit derives a plurality of simple numbers, if any of the derived plurality of simple numbers corresponds to its own simple number, the determination unit processes data based on the derived control signal. The receiving apparatus according to any one of (Item 2-9) to (Item 2-11), wherein content is determined.

(Item 2-13)
If the identification number extracted from the processed data does not correspond to its own identification number, the processing unit discards the processed data (Item 2-9) to (Item 2-12) The receiving apparatus in any one of.

(Item 2-14)
A burst signal composed of data, control information corresponding to the data, and a simple simple number for identifying the receiving device separately from the identification number of the receiving device included in the data, the control information Is repeated a number of times less than a plurality of predetermined repetition times, and the burst number is inserted according to the difference between the predetermined number of repetitions and the number of repetitions of the control information. Receiving step;
Extracting header information corresponding to the control information and the simplified number from the received burst signal;
Deriving control information and a simple number for the extracted header information by performing processing according to the predetermined number of repetitions;
If the derived simple number corresponds to its own simple number, the step of determining the processing content of the data based on the derived control information;
Processing the data according to the processing content of the determined data;
A receiving method comprising:

1 is a diagram illustrating a configuration of a communication system according to a first embodiment. It is a figure which shows the transition of the channel in the communication system of FIG. FIGS. 3A and 3B are diagrams showing the configuration of the frame format and burst format of FIG. FIGS. 4A to 4C are diagrams illustrating a header information generation process of the communication system which is a premise of the first embodiment. It is a figure which shows the structure of the transmission part in the communication system of FIG. 6A to 6C are diagrams illustrating a header information generation process in the header generation unit of FIG. It is a figure which shows the structure of the receiving part in the communication system of FIG. It is a flowchart which shows the procedure of the reception process of FIG. FIGS. 9A and 9B are diagrams illustrating the difference in frame processing according to the procedure of FIG. 8 and the communication system that is the premise of the first embodiment. FIG. 10 is a diagram illustrating a configuration of a transmission unit according to a second embodiment. It is a figure which shows a response | compatibility with the simple number memorize | stored in the memory | storage part of FIG. 10, and a group number. It is a flowchart which shows the allocation procedure of the simple number performed by the allocation part of FIG. It is a figure which shows the structure of the simple number which should be inserted in the header production | generation part of FIG. FIG. 10 is a diagram illustrating a configuration of a receiving unit according to a second embodiment. It is a flowchart which shows the procedure of the reception process of FIG. It is a figure which shows the structure of the simple number which should be inserted in the header information which concerns on Example 3, and incoming call information. It is a figure which shows the allocation of the frame which concerns on the modification of Example 3. FIG.

Explanation of symbols

  10 terminal apparatus, 12 terminal antenna, 14 base station apparatus, 16 base station antenna, 18 PSTN gateway, 20 internet gateway, 22 PSTN network, 24 internet, 30 transmitting section, 32 interface section, 34 encoding section, 36 modulation Unit, 38 signal generation unit, 40 spreading unit, 42 radio unit, 44 transmission rate control unit, 46 data length acquisition unit, 48 header generation unit, 50 incoming call notification unit, 52 control unit, 60 reception unit, 62 radio unit, 64 Despreading unit, 66 extracting unit, 68 demodulating unit, 70 decoding unit, 72 interface unit, 74 control information deriving unit, 76 transmission rate control unit, 78 data length acquisition unit, 80 determination unit, 82 control unit, 90 allocation unit, 92 storage unit, 9 4 Simple number deriving section, 96 determining section, 98 corresponding section, 100 communication system.

Claims (15)

A data input unit for inputting data to be transmitted to a predetermined receiving device;
A control information input unit for inputting control information corresponding to the input data;
An additional information input unit for inputting additional information to be added to the input control information;
A header information generation unit that generates the header information by repeating the input control information a number of times less than a plurality of predetermined repetitions;
An additional information insertion unit that inserts the input additional information into the generated header information according to a difference between the predetermined number of repetitions and the number of repetitions of the control information;
A burst signal generation unit for generating a burst signal based on the header information into which the additional information is inserted and the input data;
A transmitter for transmitting the generated burst signal to the receiving device;
A transmission device comprising: The control information input to the control information input unit is composed of a plurality of bits,
The additional information input to the additional information input unit is composed of predetermined bits,
The header information generation unit repeats each of the plurality of bits by a number less than a plurality of predetermined repetitions,
The additional information insertion unit, for a block in which each of the plurality of bits is set as one unit, has a number of repetitions smaller than the plurality of predetermined repetitions. Until the number of repetitions, instead of each of the plurality of bits, each value obtained by converting the predetermined bit is inserted, and each value obtained by converting the predetermined bit is the average value of each block. The transmission device according to claim 1, wherein the transmission device is generated so as to be close to each value of a plurality of bits.   The transmission apparatus according to claim 2, wherein the additional information insertion unit converts each of the predetermined bits into a value obtained by inverting the value and a combination of the values.   The transmission apparatus according to claim 2 or 3, wherein the predetermined bit constituting the additional information input to the additional information input unit is information for notifying the receiving apparatus of an incoming call. The predetermined bits constituting the additional information input to the additional information input unit further include an identification number assigned to the receiving device to which data is to be transmitted,
The transmission apparatus according to claim 4, wherein the additional information insertion unit divides the identification number into a plurality of parts, and inserts the divided parts into each of the blocks. A plurality of receiving devices to which data is to be transmitted are classified into a plurality of groups, and further includes an assigning unit that assigns a timing at which data is to be transmitted to each of the plurality of groups,
The additional information input to the additional information input unit includes an identification number assigned to a receiving device included in a group to which the timing to transmit the data is assigned, and information for notifying the receiving device of an incoming call. 6. The transmission apparatus according to claim 5, wherein the transmission information is combined information.   Data to be transmitted to a predetermined receiving device, control information corresponding to the data, and additional information to be added to the control information are input, and the input control information is less than a predetermined number of repetitions. While generating header information by repeating the number of times, the input additional information is inserted into the generated header information according to the difference between the predetermined number of repetitions and the number of times the control information is repeated, A transmission method characterized by generating a burst signal based on header information into which the additional information is inserted and the input data. A burst signal composed of data, control information corresponding to the data, and additional information to be added to the control information, wherein the control information is repeated a number of times less than a plurality of predetermined repetition times. A receiving unit for receiving a burst signal inserted in accordance with a difference between the number of repetitions of the additional information defined in advance and the number of repetitions of the control information;
An extraction unit that extracts header information corresponding to the control information and the additional information from the received burst signal;
A derivation unit for deriving control information and additional information by performing processing according to the plurality of predetermined repetition times for the extracted header information;
Determining a processing content of the derived control information based on the derived additional information, and determining a processing content of the determined control information and data processing based on the derived control information;
A processing unit for processing the data according to the processing content of the determined data;
A receiving apparatus comprising: The control information included in the burst signal received by the receiving unit is composed of a plurality of bits, and each of the plurality of bits is defined in advance within a block in which each of the plurality of bits is a unit. It is repeated a number of times less than a plurality of repetition times, and the additional information is composed of predetermined bits, and each value obtained by converting the predetermined bits is inserted in each block,
The derivation unit derives control information for each block included in the extracted header information by deriving control information by performing addition processing inside the block for a plurality of predetermined repetition times, and adding additional information. Additional information is obtained from each of the blocks using the fact that the conversion performed on each of the configured predetermined bits is based on the regularity that the average value of each of the blocks is close to the value of each of the plurality of bits. The receiving apparatus according to claim 8, wherein:   The derivation unit converts the conversion performed on each of the predetermined bits constituting the additional information from each of the predetermined bits to a value obtained by inverting the respective value and a value obtained by combining the respective values. The receiving apparatus according to claim 9, wherein additional information is derived from each of the blocks by using conversion. The additional information derived by the deriving unit is information for notifying an incoming call,
The receiving apparatus according to claim 8, wherein the determining unit determines demodulation of data based on the derived control information when the derived additional signal indicates an incoming call. . The additional information derived by the deriving unit further includes an identification number given to the receiving device to demodulate the data,
The receiving apparatus according to claim 11, wherein the determining unit determines demodulation of data based on the derived control information when the derived identification number is its own identification number. A plurality of receiving devices are classified into a plurality of groups by a transmitting device that should transmit a burst signal, and a data reception timing is assigned to each of the plurality of groups. A group management unit for managing
The determination unit, when the derived identification number is its own identification number and the derived additional signal indicates an incoming call at the reception timing assigned to the group to which the group belongs, the derived control information 13. The receiving apparatus according to claim 12, wherein demodulation of data based on the data is determined.   The receiving apparatus according to claim 11, further comprising: a power management unit that sets a power saving mode when the determining unit does not determine demodulation of the data. A burst signal composed of data, control information corresponding to the data, and additional information to be added to the control information, wherein the control information is repeated a number of times less than a plurality of predetermined repetition times. Receiving a burst signal inserted according to the difference between the number of repetitions of the additional information defined in advance and the number of repetitions of the control information;
Extracting header information corresponding to the control information and the additional information from the received burst signal;
Deriving control information and additional information by performing processing according to the plurality of predetermined repetition times for the extracted header information;
Determining the processing content of the derived control information based on the derived additional information, and determining the processing content of the determined control information and the data processing content based on the derived control information;
Processing the data according to the processing content of the determined data;
A receiving method comprising:

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