JP2006109022A - Radio communication system, transmitter and receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize efficient transmission while mutually complementing communication quality of both of a radio transmission path and a power line transmission path by a transmission form depending on a radio state simultaneously using both. <P>SOLUTION: A receiving part 110 and a transmitting part 120 perform modulation and demodulation, etc. for performing communication of a 2.4 GHZ band. A receiving part 210 and a transmitting part 220 perform modulation and demodulation, etc. for performing communication of a shortwave band. A logic layer control part 340 on the transmitter side simultaneously performs data transmission using both of the radio transmission path via an antenna 101 and the power line transmission path via a plug 201 by distributing data. A logical layer control part 340 on the receiver side simultaneously receives the data from both of the radio transmission path via the antenna 101 and the power line transmission path via the plug 201 and combines the data. When the pieces of data can not be received, the transmission form is set depending on the communication state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a communication system that transmits and receives distributed data through different types of transmission lines at the same time, and more particularly to a communication system, a transmission device, a reception device, a processing method therefor, and a program that causes a computer to execute the method.

  The frequency diversity method is a method for improving characteristics by transmitting the same signal using a plurality of different carrier waves and selecting or combining them on the receiving side. In this frequency diversity system, since the same signal is transmitted by a plurality of carrier waves, even if some of them cannot be received, there is an advantage that reception can be performed by other carrier waves. In particular, since the OFDM (Orthogonal Frequency Division Multiplexing) system has many carriers, the possibility that all the carriers cannot be received is extremely low, and the combination of carriers that transmit the same signal can be selected flexibly. Widely used (see, for example, Patent Document 1 and Patent Document 2).

  In this frequency diversity method, the same signal is transmitted by a plurality of carriers, for example, the dip phenomenon that the received radio wave intensity drops due to the carrier in which the direct wave and the delayed wave are out of phase on the receiving side due to the influence of multipath. Even if it occurs, it can be received by any carrier wave.

  However, in this frequency diversity method, since the same signal is transmitted simultaneously, the transmission rate decreases accordingly. In the current technology, for example, the maximum value of the wireless transmission speed in the IEEE802.11a standard by the working group of the IEEE (American Institute of Electrical and Electronics Engineers) 802 standardization committee is 54 Mbps (bits / second), which is compared with the transmission speed by wire. That's not enough.

  On the other hand, a communication system using an existing power line as a transmission line has recently attracted attention as a means for high-speed communication. This communication system is expected as a technology that can realize a high-speed communication of 100 Mbps or more without newly laying a communication line by using an existing power line.

However, the communication system using this power line has different behavior depending on the structure of the house where it communicates, and is easily affected by noise caused by life rhythm (such as noise from plugging / unplugging and dryer). There's a problem. Therefore, a technique for changing the modulation / demodulation method according to the state of the transmission line using the power line has been proposed (see, for example, Patent Document 3).
Japanese Patent Laid-Open No. 2000-201130 (FIG. 5) Japanese Patent Laid-Open No. 10-336159 (FIG. 1) Japanese Patent Laying-Open No. 2004-23311 (FIG. 1)

  As described above, in the wireless transmission path, the communication performance depends on the state of the communication path, and it is not easy to improve the transmission speed even if a scheme is devised. On the other hand, transmission lines using power lines that have attracted attention in recent years are also affected by various factors, and it is difficult to guarantee the communication quality.

  Accordingly, an object of the present invention is to realize efficient transmission while complementing both communication qualities by using both a wireless transmission line and a power line transmission line at the same time and a transmission form according to the communication state. .

  The present invention has been made to solve the above problems, and a first aspect of the present invention is a data distribution means for distributing transmission data, and a data output means for adding a distribution order to the distributed transmission data. A transmission apparatus comprising: transmission means for simultaneously transmitting the distributed transmission data to which the distribution order is added through at least one wireless transmission line and at least one power line transmission line. As a result, the transmission data is simultaneously transmitted through the wireless transmission line and the power line transmission line in a state that can be merged in accordance with the distribution order on the reception side.

  In this first aspect, the data distribution means distributes the transmission data so that the distributed transmission data are transmitted with substantially equal time lengths. As a result, the time lengths simultaneously transmitted by the wireless transmission line and the power line transmission line are aligned, and the transmission efficiency is improved.

  In the first aspect, the wireless communication path further includes a response determination unit that determines a response to the previous data transmission for each of the wireless transmission line and the power line transmission line, and the data distribution unit is configured to perform the previous determination by the response determination unit. When it is determined that reception of any of the transmission data has failed in data transmission, it is possible to distribute the same transmission data as in the previous transmission. This brings about the effect of simplifying the control for retransmission.

  In the first aspect, the wireless communication path further includes a response determination unit that determines a response to the previous data transmission for each of the wireless transmission line and the power line transmission line, and the data distribution unit is configured to perform the previous determination by the response determination unit. When it is determined that the reception of any of the transmission data has failed in the data transmission, the transmission data related to the failure can be distributed so as to be simultaneously transmitted through the wireless transmission line and the power line transmission line. As a result, the data that has failed to be received can be transmitted more reliably.

  Also, in this first aspect, when the transmission means transmits the transmission data related to the failure through the wireless transmission line and the power line transmission line at the same time, the transmission line succeeded in receiving the transmission data in the previous data transmission. It is possible to transmit in the same modulation mode as the other modulation mode. This brings about the effect | action of transmitting more reliably by the modulation mode with a track record.

  In the first aspect, the wireless communication path further includes a response determination unit that determines a response to the previous data transmission for each of the wireless transmission line and the power line transmission line, and the data distribution unit is configured to perform the previous determination by the response determination unit. When the frequency at which it is determined that reception of transmission data has failed in data transmission exceeds a predetermined reference in the same transmission path, the transmission data can be distributed so that transmission on the transmission path is not performed thereafter. As a result, the transmission path having a high reception failure frequency is regarded as having a deteriorated communication state, and the transmission is stopped.

  In the first aspect, the wireless communication path further includes response determination means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line, and the data distribution means is configured to transmit the same transmission by the response determination means. When it is determined that reception of transmission data in the previous data transmission has failed continuously for a predetermined number of times on the path, the transmission data can be distributed so that transmission on the transmission path is not performed thereafter. As a result, a transmission path that fails to receive continuously for a predetermined number of times or more is regarded as having a deteriorated communication state, and the transmission is stopped.

  Further, in the first aspect, the wireless communication path further includes response determination means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line, and the data distribution means includes the response determination means by the response determination means. When the frequency at which reception is determined to be successful exceeds a predetermined reference in the same transmission line, transmission data can be distributed so that transmission on the transmission line is performed thereafter. As a result, the transmission path having a high frequency of successful reception is considered to have improved communication status and transmission is resumed.

  In the first aspect, the wireless communication path further includes response determination means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line, and the data distribution means is configured to transmit the same transmission by the response determination means. When it is determined that the response has been successfully received for a predetermined number of times or more on the path, the transmission data can be distributed so that transmission on the transmission path is performed thereafter. As a result, the transmission path that has been successfully received continuously for a predetermined number of times or more is considered to have improved communication status and transmission is resumed.

  In the first aspect, the wireless communication path further includes a response determination unit that determines a response to the previous data transmission for each of the wireless transmission line and the power line transmission line, and the data distribution unit is configured to perform the previous determination by the response determination unit. When the frequency at which it is determined that reception of transmission data has failed in data transmission exceeds a predetermined standard in the same transmission path, transmission data is transmitted so that transmission on the transmission path is performed in a modulation mode having more noise resistance thereafter. Can be distributed. As a result, a transmission path with a high frequency of reception failure is regarded as having a deteriorated communication state, and transmission is performed in a modulation mode that is more resistant to noise.

  In the first aspect, the wireless communication path further includes response determination means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line, and the data distribution means is configured to transmit the same transmission by the response determination means. When it is determined that reception of transmission data in the previous data transmission has failed continuously for a predetermined number of times on the path, the transmission data is transmitted so that transmission on the transmission path is performed in a modulation mode with more noise resistance thereafter. Can be distributed. As a result, the transmission path that has failed to receive continuously for a predetermined number of times or more is regarded as having deteriorated communication state and is transmitted in a modulation mode having more noise resistance.

  Further, in the first aspect, the wireless communication path further includes response determination means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line, and the data distribution means includes the response determination means by the response determination means. When the frequency at which reception is determined to be successful exceeds a predetermined reference in the same transmission path, transmission data can be distributed so that transmission on the transmission path is performed in a modulation mode that is less noise-resistant thereafter. . As a result, the transmission path having a high frequency of successful reception is considered to have improved communication status and is transmitted in a modulation mode with less noise tolerance.

  In the first aspect, the wireless communication path further includes response determination means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line, and the data distribution means is configured to transmit the same transmission by the response determination means. If it is determined that the response has been successfully received more than a predetermined number of times on the path, the transmission data can be distributed so that transmission on the transmission path is performed in a modulation mode with less noise resistance thereafter. As a result, the transmission path that has been successfully received for a predetermined number of times or more is regarded as having improved communication conditions, and is transmitted in a modulation mode with less noise tolerance.

  In addition, in the first aspect, carrier sense means for reporting the availability of each transmission line prior to data transmission is further provided, and the transmission means is connected to the transmission line reported as not available by the carrier sense means. The data transmission is not performed, and after the data transmission in a transmission path other than the transmission path is started, it is determined that the transmission path is determined not to be empty even when the transmission path is determined not to be empty. The data transmission to the transmission line can be prevented from being performed. This brings about the effect of simplifying the control for transmission.

  According to a second aspect of the present invention, there is provided data receiving means for simultaneously receiving at least one wireless transmission line and at least one power line transmission line data distributed and added with the distribution order, and according to the distribution order described above. A receiving apparatus comprising data merging means for merging received data. As a result, the data distributed on the transmission side is simultaneously received and merged by the wireless transmission line and the power line transmission line.

  Further, in this second aspect, the data determination means for determining the data reception state for each of the wireless transmission line and the power line transmission line, and the same response including all the determination results by the data determination means, the wireless transmission line and Response output means for outputting to all of the power line transmission lines can be further provided. As a result, even when the communication state of any of the transmission paths is deteriorated, the response is more reliably returned to the data transmission source.

  According to a third aspect of the present invention, there is provided a communication system including a transmission device and a reception device that perform wireless communication. The transmission device includes data distribution means for distributing transmission data and the distributed transmission. A data output means for adding a distribution order to the data, and a transmission means for transmitting the distributed transmission data to which the distribution order has been added simultaneously through at least one wireless transmission line and at least one power line transmission line, The receiving device includes data receiving means for simultaneously receiving the data to which the distribution order is added through the wireless transmission line and the power line transmission line, data merging means for merging the received data according to the distribution order, and the wireless Data discriminating means for discriminating the data reception state for each transmission line and power line transmission line, and all the data discriminating means By all the same response including the further result of the wireless transmission path and a power line transmission path is a communication system characterized by comprising a response output means for outputting to the device unit. As a result, the distribution order is added to the data distributed on the transmission side, and the data is simultaneously transmitted through the wireless transmission line and the power line transmission line, and the data is merged according to the distribution order on the reception side.

  According to a fourth aspect of the present invention, a procedure for distributing transmission data, a procedure for adding a distribution order to the distributed transmission data, and the distributed transmission data to which the distribution order is added are simultaneously performed. And a procedure for transmitting via at least one wireless transmission line and at least one power line transmission line. As a result, the transmission data is simultaneously transmitted through the wireless transmission line and the power line transmission line in a state that can be merged in accordance with the distribution order on the reception side.

  The fifth aspect of the present invention provides a procedure for distributing transmission data, a procedure for adding a distribution order to the distributed transmission data, and the distributed transmission data to which the distribution order is added at the same time. Transmission procedure using at least one wireless transmission path and at least one power line transmission path, and the same transmission as the transmission when reception of the transmission data fails in any one of the wireless transmission path and the power line transmission path And a procedure for distributing data so as to be retransmitted. This brings about the effect of simplifying the control for retransmission.

  According to a sixth aspect of the present invention, a procedure for distributing transmission data, a procedure for adding a distribution order to the distributed transmission data, and the distributed transmission data to which the distribution order is added are simultaneously performed. Procedures for transmission through at least one wireless transmission line and at least one power line transmission line, and data related to the failure when reception of the transmission data fails in any one of the wireless transmission line and the power line transmission line And a procedure for distributing the data so as to be transmitted simultaneously through the wireless transmission line and the power line transmission line. As a result, the data that has failed to be received can be transmitted more reliably.

  According to a seventh aspect of the present invention, there is provided a procedure for simultaneously receiving data distributed and added with the distribution order by at least one wireless transmission line and at least one power line transmission line, and receiving the data according to the distribution order. The same response including the procedure for merging data, the procedure for determining the data reception state for each of the wireless transmission line and the power line transmission line, and the determination result of the data reception state for each of the wireless transmission line and the power line transmission line And a procedure for outputting to all of the transmission line and the power line transmission line. As a result, even when the communication state of any of the transmission paths is deteriorated, the response is more reliably returned to the data transmission source.

  Further, an eighth aspect of the present invention provides a procedure for distributing transmission data, a procedure for adding a distribution order to the distributed transmission data, and the distributed transmission data to which the distribution order is added at the same time. A program that causes a computer to execute at least one wireless transmission path and a procedure of transmitting via at least one power line transmission path. As a result, the transmission data is simultaneously transmitted through the wireless transmission line and the power line transmission line in a state that can be merged in accordance with the distribution order on the reception side.

  Further, a ninth aspect of the present invention provides a procedure for distributing transmission data, a procedure for adding a distribution order to the distributed transmission data, and the distributed transmission data to which the distribution order is added at the same time. Transmission procedure using at least one wireless transmission path and at least one power line transmission path, and the same transmission as the transmission when reception of the transmission data fails in any one of the wireless transmission path and the power line transmission path A program for causing a computer to execute a procedure for distributing data so as to be retransmitted. This brings about the effect of simplifying the control for retransmission.

  The tenth aspect of the present invention provides a procedure for distributing transmission data, a procedure for adding a distribution order to the distributed transmission data, and the distributed transmission data to which the distribution order is added at the same time. Procedures for transmission through at least one wireless transmission line and at least one power line transmission line, and data related to the failure when reception of the transmission data fails in any one of the wireless transmission line and the power line transmission line Is a program that causes a computer to execute a procedure for distributing the data so as to be transmitted simultaneously through a wireless transmission line and a power line transmission line. As a result, the data that has failed to be received can be transmitted more reliably.

  The eleventh aspect of the present invention provides a procedure for simultaneously receiving at least one wireless transmission line and at least one power line transmission line data distributed and added with the distribution order, and receiving the data according to the distribution order. The same response including the procedure for merging data, the procedure for determining the data reception state for each of the wireless transmission line and the power line transmission line, and the determination result of the data reception state for each of the wireless transmission line and the power line transmission line A program for causing a computer to execute a procedure for outputting to all of a transmission line and a power line transmission line. As a result, even when the communication state of any of the transmission paths is deteriorated, the response is more reliably returned to the data transmission source.

  According to the present invention, in a wireless communication system, both a wireless transmission line and a power line transmission line are used at the same time, and efficient transmission is realized while complementing both communication qualities according to the transmission mode according to the communication state. An excellent effect can be achieved. In addition, by simultaneously using different types of transmission paths in this way, the paths are distributed, and an effect of preventing data leakage due to eavesdropping can be obtained.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing an outline of data distribution in the embodiment of the present invention. Data to be transmitted in the transmission apparatus is sequentially divided from the top into D1 and D2, D3 and D4, and so on. The divided data is distributed and transmitted to a plurality of different transmission paths, for example, the data D1 is transmitted on the wireless transmission path A and the data D2 is transmitted on the transmission path B using the power line. In FIG. 1, an example in which distribution is performed on two transmission paths A and B is shown, but the number of transmission paths to be distributed can be set as appropriate.

  The distributed data D1 and D2 are simultaneously transmitted via a wireless transmission path A and a power transmission line B, respectively. The modulation modes in each transmission path do not need to match, but it is desirable to set the number of bits at the time of data division so that the time lengths required for transmission substantially match. After the data D1 and D2 are transmitted, the data D3 and D4 are simultaneously transmitted through the transmission lines A and B, respectively. As long as the communication state in each transmission path permits, such simultaneous transmission through the transmission paths A and B is sequentially performed.

  In the embodiment of the present invention, a wireless transmission line is assumed as the type of one transmission line, and a transmission line using a power line is assumed as the type of the other transmission line. Although there is no restriction | limiting in particular about the specific frequency of a wireless transmission line, when using in wireless LAN (local area network) is assumed, it is possible to use a 2.4 GHz band or a 5 GHz band, for example. On the other hand, in a transmission line using a power line, a short wave band, that is, a frequency band from 3 MHz to 30 MHz is generally used. As a modulation method, the OFDM method is generally used from the viewpoint of multipath countermeasures and easy removal of partial interference with other systems.

  FIG. 2 is a diagram showing a configuration of a terminal station or a base station in the embodiment of the present invention. The terminal station or the base station has a function as a 2.4 GHz band as an example of a radio transmission path and a short wave band transmission apparatus or reception apparatus as an example of a transmission line using a power line. That is, the antenna includes a 2.4 GHz band antenna 101, a switch 103, a power amplifier 104, a reception unit 110, and a transmission unit 120, and includes a short wave band plug 201, a coupler 202, and a switch. 203, a power amplifier 204, a receiving unit 210, and a transmitting unit 220. Therefore, transmission / reception in the 2.4 GHz band and transmission / reception in the short wave band can be performed simultaneously.

  The antenna 101 is used for transmitting and receiving a 2.4 GHz band high frequency signal. The switch 103 switches the receiving unit 110 and the transmitting unit 120 in the 2.4 GHz band and connects them to the antenna 101. The switch 203 switches the reception unit 210 and the transmission unit 220 in the short wave band and connects them to the coupler 202. The plug 201 is a power cord plug connected to a power line outlet. The coupler 202 is a coupler for coupling a shortwave signal and a power line.

  The 2.4 GHz band and short wave band receiving units 110 and 210 receive, demodulate, and decode signals in the 2.4 GHz band and the short wave band, respectively. On the other hand, the transmitters 120 and 220 in the 2.4 GHz band and the short wave band respectively encode and modulate to transmit signals in the 2.4 GHz band and the short wave band, respectively. Power amplifiers 104 and 204 are connected to the output units of the transmission units 120 and 220 in the 2.4 GHz band and the short wave band, respectively. The power amplifiers 104 and 204 amplify the transmission signal.

  The terminal station or base station further includes a communication control unit 300. The communication control unit 300 mainly performs logical layer processing, and includes a logical layer control unit 340, a memory 350, and a physical layer interface 360. The logical layer control unit 340 processes a frame of a MAC (Media Access Control) sublayer in the data link layer as a logical layer, for example. The memory 350 holds work data necessary for processing by the logical layer control unit 340. The physical layer interface 360 is an interface that communicates with the physical layer realized by the reception units 110 and 210 and the transmission units 120 and 220 in the 2.4 GHz band and the short wave band.

  The terminal station or base station further includes a peripheral interface 400. In the case of a terminal station, a host interface is used as the peripheral interface 400, and a host device such as a computer is connected to the port 409 of the host interface. On the other hand, in the case of a base station, a network interface is used as the peripheral interface 400, and a modem for using the Internet or the like is connected to the port 409 of the network interface.

  Here, an example has been described in which a pair of receiving unit 110 and transmitting unit 120 in the 2.4 GHz band and one receiving unit 210 and transmitting unit 220 in the short wave band are provided. It does not prevent the provision of multiple sets of parts. In particular, for the wireless transmission path, for example, communication using a plurality of wireless transmission paths may be performed using different frequency bands such as 2.4 GHz and 5 GHz, and communication may be performed using wireless transmission paths using different channels in the same frequency band. May be performed. Further, communication may be performed through transmission paths having different transfer functions in the same channel.

  FIG. 3 is a diagram illustrating a configuration of the reception unit 210 of the terminal station or the base station in the embodiment of the present invention. The receiving unit 210 converts a short-wave high-frequency signal received by the antenna 201 into an intermediate signal, and demodulates and decodes the intermediate signal. Assuming the OFDM system, the receiving unit 210 includes a down converter 211, an orthogonal demodulator 212, a discrete Fourier transformer 213, a differential decoder 214, a demapping circuit 215, and an error correction circuit 216.

  The down-converter 211 converts a short wave band signal into an intermediate signal of a predetermined intermediate frequency band. The quadrature demodulator 212 performs quadrature detection on the intermediate signal converted by the down-converter 211, and includes a base signal composed of an in-phase signal (I signal) in phase with the intermediate signal and a quadrature signal (Q signal) that is a quadrature component of the intermediate signal. Extract the band signal. The discrete Fourier transformer 213 performs Fourier transform on the baseband signal extracted by the quadrature demodulator 212 in an effective symbol period excluding the guard period, and demodulates complex data for each subcarrier.

  The differential decoder 214 performs differential decoding on the complex data demodulated by the discrete Fourier transformer 213, and is used, for example, in the PSK system. The demapping circuit 215 demaps the complex data decoded by the differential decoder 214 and extracts data symbols. The error correction circuit 216 corrects data by Viterbi decoding or the like. The data thus obtained is output to the physical layer interface 360 of the communication control unit 300.

  Although the short wave band receiving unit 210 has been described here, the 2.4 GHz band receiving unit 110 converts the 2.4 GHz band signal received by the antenna 101 into an intermediate signal and demodulates and decodes the signal by the same configuration.

  FIG. 4 is a diagram showing a configuration of the transmission unit 220 of the terminal station or base station in the embodiment of the present invention. The transmission unit 220 encodes and modulates data from the physical layer interface 360, converts the data into a high-frequency signal, and outputs the high-frequency signal to the antenna 201. Assuming the OFDM system, the transmission unit 220 includes an error correction encoding circuit 221, a map circuit 222, a differential encoder 223, an inverse discrete Fourier transformer 224, an orthogonal modulator 225, and an up converter 226. And have.

  The error correction encoding circuit 221 performs encoding using a convolutional code or the like according to the bit rate. The map circuit 222 maps the data error-coded by the error correction coding circuit 221 to complex data symbols. The differential encoder 223 differentially encodes the complex data symbols mapped by the map circuit 222 and assigns complex data for each subcarrier.

  The inverse discrete Fourier transformer 224 modulates the complex data differentially encoded by the differential encoder 223 by inverse Fourier transform, and outputs baseband signals (I signal and Q signal). The quadrature modulator 225 performs quadrature modulation on the baseband signal to generate an intermediate signal in a predetermined intermediate frequency band. The up-converter 226 converts the intermediate signal generated by the quadrature modulator 225 into a short wave band signal and outputs the signal to the antenna 201.

  Although the shortwave band transmission unit 220 has been described here, the 2.4 GHz band transmission unit 120 also encodes and modulates data from the physical layer interface 360 and converts it to a 2.4 GHz band signal with the same configuration. Output toward the antenna 101.

  FIG. 5 is a diagram showing a functional configuration of a data transmission control function by the communication control unit 300 in the embodiment of the present invention. The data transmission control function includes a data distribution unit 331 that distributes data held in the data buffer 332, a distribution control unit A310 that controls data distribution in a frequency band A (eg, 2.4 GHz band), and a frequency band B ( For example, a distribution control unit B320 that controls data distribution in a short wave band).

  The distribution control unit A310 includes a carrier sense unit A311, a response determination unit A312, a counter A313, and a data output unit A315. The carrier sense unit A311 reports the availability in the frequency band A to the data output unit A315, the response determination unit A312 and the data distributor 331. When the carrier sense unit A311 reports that the frequency band A is not available, the data output unit A315 does not output data. As a result, if the frequency band B is vacant, data transmission is performed only in the frequency band B. In that case, when data transmission in the frequency band B is started, it is desirable to perform control so that data transfer in the frequency band A is not performed even if it is later determined that the frequency band A is vacant. . This is to avoid complication of control due to a shift in data transmission timing in each frequency band. In addition, the response determination unit A312 and the data distributor 331 can perform control related to the next data transmission without waiting for an actual response when the carrier sense unit A311 reports that the frequency band A is not available.

  The response determination unit A312 determines a response to the previous data transmission in the frequency band A and supplies the result to the data distribution unit 331, the counter A313, and the counter B323. The data distribution unit 331 sequentially distributes the data from the data buffer 332 to the data output unit A315 and the data output unit B325 as described later. However, data transmission in the frequency band A is stopped (that is, shifted to the transmission stop mode) or resumed (that is, shifted to the transmission mode) according to the state of the counter A 313 as follows.

  The counter A 313 includes a success counter A and a failure counter A. The success counter A counts the number of consecutive times when the response to the data transmission in the frequency band A is succeeded. On the other hand, the failure counter A counts the number of consecutive times when transmission data reception in the frequency band A fails continuously. When the value of the failure counter A indicates a predetermined number of times or more, the data distribution unit 331 distributes transmission data so that data transmission in the frequency band A is not performed thereafter. That is, the transmission mode is shifted from the transmission mode to the transmission suspension mode for the frequency band A. On the other hand, when the value of the success counter A indicates a predetermined number of times or more in the transmission stop mode, the data distribution unit 331 distributes transmission data so as to perform data transmission in the frequency band A thereafter. That is, the transmission band mode is shifted to the transmission mode for the frequency band A.

  The counter A313 is supplied with response discrimination results from both the response discriminator A312 and the response discriminator B322, and the communication state in one of the frequency bands deteriorates so that the response cannot be received. Even in such a case, if a response can be received in at least one frequency band, the data reception state in all frequency bands can be recognized.

  Although the distribution control unit A310 has been described here, the distribution control unit B320 also controls data distribution in the frequency band B with the same configuration. The suspension and resumption of data transmission in the frequency band B in the data distribution unit 331 are also independently controlled according to the state of the counter B 323 without depending on the state of the frequency band A.

  FIG. 6 is a diagram showing a functional configuration of a data reception control function by the communication control unit 300 in the embodiment of the present invention. The data reception control function includes a data merging unit 371 for merging data received in each frequency band and holding the data in the data buffer 372, and a merging control unit A350 for controlling data merging in the frequency band A (eg, 2.4 GHz band). And a merge control unit B360 for controlling data merge in the frequency band B (for example, a short wave band).

  The merge control unit A350 includes a data determination unit A351 and a response output unit A352. The merge control unit B360 includes a data determination unit B361 and a response output unit B362. Here, the data discriminating unit A351 discriminates the data reception state in the frequency band A and supplies the result to the data merging unit 371 and the response output units A352 and B362. The data discriminating unit B361 discriminates the data reception state in the frequency band B and supplies the result to the data merging unit 371 and the response output units A352 and B362.

  The response output unit A352 outputs the response in the frequency band A together with the determination result of the data reception state in the frequency band A by the data determination unit A351 and the determination result of the data reception state in the frequency band B by the data determination unit B361. In addition, the response output unit B362 outputs the determination result of the data reception state in the frequency band A by the data determination unit A351 and the determination result of the data reception state in the frequency band B by the data determination unit B361 as a response in the frequency band B. To do. That is, the response in each frequency band includes the determination result of the data reception state in all frequency bands.

  FIG. 7 is a diagram showing a frame structure of a data packet in the embodiment of the present invention. This data packet is used when data is transmitted from a terminal station or a base station, and includes a physical layer header 610, a MAC header 620, and a payload 630. The physical layer header 610 is a header of a PLCP frame that transmits information in, for example, a PLCP (Physical Layer Convergence Protocol) sublayer as a physical layer, and includes fields indicating a transmission rate, a modulation method, a length of the PLCP frame, and the like. The MAC header 620 is a header of a MAC frame that conveys information in the MAC sublayer, and includes fields indicating the type of frame, the transmission / reception address of the frame, and the like. The payload 630 is a MAC frame payload and includes data 631 and a CRC 632.

  In the embodiment of the present invention, the MAC header 620 in the data packet includes fields of usage status 621, order 622, and CRC 623. The usage status 621 is a field indicating the usage status of each frequency band when this frame is transmitted, and 1 bit is assigned to each frequency band. For example, when the first bit is “0”, it indicates that the 2.4 GHz band is not used, and when it is “1”, the 2.4 GHz band is used. Similarly, when the second bit is “0”, it indicates that the short wave band is not used, and when it is “1”, it indicates that the short wave band is used. Thereby, receiving units 110 and 210 that have received the frame can know whether or not there is a frame transmitted simultaneously in another frequency band. The order 622 is a field indicating the order relation between the data transmitted at the same time. For example, when two data are distributed at the same time, “0” indicates the first half data, and “1” Indicates that it is the latter half data. CRC 623 is a cyclic redundancy check code for detecting a data error in the MAC header 620.

  At the time of frame transmission, the data distribution unit 331 of the communication control unit 300 generates the frequency band 621 and the order 622 and adds them to the MAC header 620. On the other hand, on the frame receiving side, the data merging unit 371 of the communication control unit 300 stores data in the data buffer 372 according to the order 622.

  Here, distribution of the data 631 is performed under the following conditions.

  FIG. 8 is a diagram showing an example of data distribution in the embodiment of the present invention. An example in which the data 601 to be transferred is divided into two and transmitted by data packets 602 and 603 will be described. In this example, the transfer data 601 is 1512 bytes, the data included in the data packet 602 is 504 bytes, and the data included in the data packet 603 is 1008 bytes. As a condition for distribution, the data packet 602 has a modulation mode of QPSK and a coding rate of 1/2, and the data packet 603 has a modulation mode of 16QAM and a coding rate of 1/2. Under this condition, the time required for transmission is equal between the 504 bytes of data included in the data packet 602 and the 1008 bytes of data included in the data packet 603.

If the number of bits related to the modulation scheme of the first half and the second half is m1 and m2, respectively, and the coding rate is r1 and r2, respectively,
m1 × r1: m2 × r2
If the data is distributed according to the ratio, the transmission times of both are equal. In the above example,
2 × (1/2): 4 × (1/2) = 1: 2
The ratio between the first half and the second half is 1: 2. As another example, if the first half modulation mode is BPSK and the coding rate is 1/2, the second half modulation mode is 64QAM and the coding rate is 3/4,
1 × (1/2): 6 × (3/4) = 1: 9
It becomes. By performing such data distribution, the time required for transmission can be made equal.

The detailed calculation including the MAC header and data CRC is as follows. However, it is assumed that the physical layer header is the same modulation mode without changing the modulation mode for each transmission. The MAC header is 30 bytes, the CRC of the data is 4 bytes, the number of bytes of transmission data is d, the number of bytes of data in the first half and the second half is d1 and d2, respectively, and the number of bits related to the modulation method is m1 and m2, respectively. Assuming that the conversion rates are r1 and r2, respectively, the following equation holds from the condition that the data transmission times of the first half and the second half are equal.
(30 + d1 + 4) / (m1 × r1) = (30 + d2 + 4) / (m2 × r2)
d = d1 + d2
Solving this for d1 and d2,
d1 = d × (m1 × r1) / (m1 × r1 + m2 × r2)
+ 34 × (m1 × r1−m2 × r2) / (m1 × r1 + m2 × r2)
d2 = d × (m2 × r2) / (m1 × r1 + m2 × r2)
+ 34 × (m2 × r2−m1 × r1) / (m1 × r1 + m2 × r2)
It becomes.

  In addition, when a packet is defined by including information to be transmitted depending on the modulation mode in a part of the physical layer header, it corresponds to “34” in the second term on the right side of the above equations. The value is changed accordingly. Of course, if the data length of the MAC header is different, the value corresponding to “34” is appropriately changed.

  FIG. 9 is a diagram showing a frame structure of the response packet in the embodiment of the present invention. This response packet is returned from the terminal station or base station that has received data to the terminal station or base station that is the data transmission source, and includes a physical layer header 640, a MAC header 650, and a payload 660. The physical layer header 640 is a header of a PLCP frame that transmits information in the PLCP sublayer, and the MAC header 650 is a header of a MAC frame that transmits information in the MAC sublayer. The physical layer header of the data packet in FIG. Similar to 610 and MAC header 620.

  In the response packet according to the embodiment of the present invention, the payload 660 includes fields of state 661 and CRC 662. A state 661 is a field indicating the reception state of distributed data. CRC 662 is a cyclic redundancy check code for detecting data errors in the MAC header 650 and the payload 660.

  The state 661 includes all reception states relating to data that has been distributed and transmitted simultaneously. Therefore, for example, even a response packet in the frequency band A includes not only the frequency band A but also the reception state of the frequency band B. Therefore, the state 661 includes information corresponding to the number of distributed data. When the data is distributed and transmitted in two, for example, the first bit indicates the reception state of the first half and the second bit indicates the latter half. It is possible to indicate the reception state of the unit. That is, the first bit is “0” when the first half is successfully received, and the first bit is “1” when the first half is unsuccessful. Similarly, the second bit is “0” when the second half is successfully received, and the second bit is “1” when the second half is unsuccessfully received.

  The response packet state 661 is generated by the response output units A352 and B362 based on the determination results in the data determination units A351 and B361 of the communication control unit 300 of the terminal station or base station that received the data. This response packet is returned to the data transmission source terminal station or base station, and the state 661 is determined by the response determination units A312 and B322 of the data transmission source terminal station or base station.

  Next, operations of the terminal station and the base station in the embodiment of the present invention will be described with reference to the drawings.

  FIG. 10 is a sequence chart showing an example of operations of the terminal station and the base station in the embodiment of the present invention. Here, data is transmitted from a base station to a terminal station using a wireless transmission line using a frequency band A (for example, 2.4 GHz band) and a power line transmission line using a frequency band B (for example, a short wave band). To do. Processing in frequency band A at the base station is “base station A”, processing in frequency band B at the base station is “base station B”, processing in frequency band A at the terminal station is “terminal station A”, and The processing by the frequency band B is represented as “terminal station B”.

  First, the base station distributes data to data D1 and data D2, and transmits data 131 in frequency band A and data D2 in frequency band B simultaneously (131, 231). It is assumed that the terminal station has successfully received these data D1 and data D2. “OK” or “NG” written on the right side of the terminal station A and the terminal station B indicates “success” or “failure” as the data reception state, respectively. The terminal station returns the reception state in frequency band A and frequency band B as responses to both the frequency band A and frequency band B and returns them to the base station simultaneously (141, 241). It is assumed that the base station has successfully received these responses 141 and 241. “OK” or “NG” described on the left side of the base station A and the base station B indicates “success” or “failure” as the response reception state, respectively.

  Subsequently, the base station distributes the data to the data D3 and the data D4, and simultaneously transmits the data D3 in the frequency band A and the data D4 in the frequency band B (132, 232). It is assumed that the terminal station has successfully received data D4 but has failed to receive data D3. The terminal station returns the reception states in frequency band A and frequency band B as responses to both the frequency band A and frequency band B and returns them simultaneously to the base station (142, 242). It is assumed that the base station has successfully received these responses 142 and 242.

  Since it becomes clear from the responses 142 and 242 that the data D3 could not be received, the data distribution unit 331 again transmits the data D3 in the frequency band A, the data D4 in the frequency band B, and both simultaneously (133, 233). To do. At this time, it is assumed that the terminal station has successfully received the data D4 but has failed to receive the data D3. The terminal station uses the reception states in frequency band A and frequency band B as responses, and returns them to the base station simultaneously in both frequency bands A and B (143, 243). Here, it is assumed that the base station has successfully received the response 243 but has failed to receive the response 143.

  Since the response 243 includes not only the reception state in the frequency band B but also the reception state in the frequency band A, the data distribution unit 331 recognizes that the data D3 could not be transmitted, and again receives the data D3 and the data D4. Try sending. Here, it is assumed that the communication state in the frequency band A deteriorates and the data D3 and the data D4 are not successfully retransmitted. Even though the data distribution unit 331 has transmitted the data D3 and the data D4 n times consecutively (134, 234), the terminal station succeeded in receiving the data D4 at this time, but failed to receive the data D3. Shall be.

  The number of consecutive times that the data D3 is not normally received in the frequency band A is counted by the failure counter A of the counter A313. If it is notified by the response 244 that the data D3 has not been received and it has been found that the transmission data in the frequency band A has failed to be received n times in succession, it is assumed that the communication state in the frequency band A has deteriorated. No data transfer in the frequency band A is performed. Then, the data D3 that has not been received is transmitted (235) in the frequency band B, and is received successfully. Even if reception of the response 245 in the frequency band B fails for the transmission 235 of the data D3, the base station indicates that the transmission 235 of the data D3 has succeeded by successfully receiving the response 145 in the frequency band B. Recognized.

  Since data transmission in frequency band A is suspended, subsequent data D5 and subsequent data are sequentially transmitted (236) in frequency band B, but responses 146 and 246 are continued in frequency band A and frequency band B as they are. Is done. In these responses 146 and 246, it is notified that the reception state in the frequency band A in which transmission is stopped is “failure”.

  FIG. 11 is a diagram illustrating the contents of the determination of the data retransmission process in the example of FIG. In the example of FIG. 10, when the reception of the data D3 (132) in the frequency band A fails, the data D3 is retransmitted (133) in the frequency band A, and at the same time, the normally received data D4 is also retransmitted in the frequency band B. (233). The determination in this case is as follows. First, when a response cannot be received in either frequency band A or frequency band B (step S931), it is not possible to determine whether transmission data is received, so data in frequency band A and frequency band B is again transmitted. Retransmit (step S934). In addition, in step S931, the case where data transmission cannot be performed in any of frequency band A and frequency band B as a result of carrier sense is also included.

  In addition, when it is found that a response can be received in either frequency band A or frequency band B, but any transmission data cannot be received from the contents (step S933), frequency band A and frequency band are again obtained. Each data is retransmitted in B (step S934). Similarly, when data transmission cannot be performed in either frequency band A or frequency band B as a result of carrier sense, step S934 is executed in the same manner.

  On the other hand, when it is found from the content of the response that all transmission data has been received (step S933), the next data is newly transmitted (step S935). If there is data that has been successfully transmitted by the previous transmission due to retransmission, the success / failure determination in step S933 is also performed including that data.

  FIG. 12 is a sequence chart showing another example of operations of the terminal station and the base station in the embodiment of the present invention. Here, it is assumed that transmission in the frequency band A is stopped as in the last state of FIG. Therefore, the base station transmits data 251 in frequency band B (251). It is assumed that the terminal station has successfully received the data D11. The terminal station uses the reception states in frequency band A and frequency band B as responses, and returns them to the base station simultaneously in both frequency band A and frequency band B (161, 261). However, the reception state in the frequency band A for which transmission is stopped is notified as “failure”. It is assumed that the base station has normally received the response 261 in the frequency band B, but has not received the response 161 in the frequency band A.

  Subsequently, the base station transmits (252) data D12 in frequency band B. It is assumed that the terminal station has successfully received the data D12. The terminal station uses the reception states in frequency band A and frequency band B as responses, and sends back to the base station simultaneously in both frequency band A and frequency band B (162, 262). It is assumed that the base station has successfully received these responses 162 and 262.

  Furthermore, the base station transmits data 253 in frequency band B (253). It is assumed that the terminal station has successfully received the data D13. The terminal station uses the reception states in frequency band A and frequency band B as responses, and returns them to the base station simultaneously in both frequency bands A and B (163, 263). It is assumed that the base station has successfully received these responses 163 and 263.

  Similar processing is repeated, and the base station transmits data 254 in frequency band B (254), and the responses 164 and 264 are received successfully at the base station.

  The number of times that the response is normally received in the frequency band A is counted by the success counter A of the counter A313. If the response 164 is normally received and the response in the frequency band A is successfully received m times continuously, it is assumed that the communication state in the frequency band A has been improved. To be done. Therefore, subsequent data D22 and data D23 are distributed to frequency band A and frequency band B and transmitted (155, 255) at the same time.

  FIG. 13 is a diagram illustrating transmission suspension and resumption control by the counter A 313 according to the embodiment of the present invention. In this figure, the success counter A in the counter A 313 is represented by OK_A, and the failure counter A is represented by NG_A.

  The failure counter A (NG_A) is cleared to zero in advance (step S910). When reception of transmission data in frequency band A is successful (step S911), failure counter A is cleared to zero (step S912). On the other hand, when reception of transmission data in frequency band A fails (step S911), one failure counter A is added (step S913). As a result, when the failure counter A reaches the predetermined number “n” or more (step S914), data transmission in the frequency band A is stopped thereafter (step S915). In the state where data is transmitted in the frequency band A (transmission mode), the determinations in steps S911 to S914 are repeated.

  The success counter A (OK_A) is cleared to zero in advance (step S920). Even in the state where transmission of data in the frequency band A is stopped (transmission stop mode), the response is continuously transmitted also in the frequency band A. If the response in the frequency band A is successfully received (step S921), one success counter A is added (step S922). On the other hand, if reception of a response in the frequency band A fails (step S921), the success counter A is cleared to zero (step S923). As a result, when the success counter A is equal to or greater than the predetermined number “m” (step S924), data transmission in the frequency band A is resumed thereafter (step S925). In the state where transmission of data in the frequency band A is stopped (transmission stop mode), the determinations in steps S921 to S924 are repeated.

  FIG. 14 is a sequence chart showing still another example of the operations of the terminal station and the base station in the embodiment of the present invention. In the example of FIG. 10, when reception of data D3 (132) fails in frequency band A, data D3 is retransmitted (133) in frequency band A, and at the same time, data D4 that has already been received normally is also in frequency band B. Resending (233). In the example of FIG. 14, when data reception fails in any frequency band, data that has already been received normally is not transmitted, and data that has failed to be received is transmitted simultaneously in different frequency bands. This improves communication efficiency.

  First, the base station distributes data to data D31 and data D32, and transmits both data D31 in frequency band A and data D32 in frequency band B simultaneously (171, 271). It is assumed that the terminal station has successfully received these data D31 and data D32. The terminal station returns (181, 281) the reception state in frequency band A and frequency band B to the base station simultaneously as a response by both frequency band A and frequency band B. It is assumed that the base station has successfully received these responses 181 and 281.

  Subsequently, the base station distributes the data to the data D33 and the data D34, and simultaneously transmits the data D33 in the frequency band A and the data D34 in the frequency band B (172, 272). It is assumed that the terminal station has successfully received data D34, but has failed to receive data D33. The terminal station returns (182, 282) the reception state in frequency band A and frequency band B to the base station simultaneously as a response by both frequency band A and frequency band B. It is assumed that the base station has successfully received these responses 182 and 282.

  Since it becomes clear from the responses 182 and 282 that the data D33 could not be received, the data distribution unit 331 transmits the data D33 simultaneously in both the frequency band A and the frequency band B (173, 273). It is assumed that the terminal station has failed to receive data D33 in frequency band A but has successfully received data D33 in frequency band B. Similarly, this reception state is simultaneously returned to the base station (183, 283) in both frequency band A and frequency band B by a response from the terminal station. Here, it is assumed that the base station has successfully received the response 283 but has failed to receive the response 183.

  Note that it is desirable to match the modulation modes in the frequency band A and the frequency band B when transmitting the data D33 (173, 273). In this case, it is conceivable to employ the modulation mode in the frequency band B in which the data D34 (272) has been successfully received. However, the communication state in the frequency band A is relatively good, and the cause of the error is considered to be a bit error. For example, a modulation mode in the frequency band A in which reception has failed can be employed. Further, when the modulation mode cannot be changed due to restrictions of the transmission / reception device, transmission may be performed without changing the modulation mode.

  When the response 283 reveals that the data D33 has been normally received, the base station distributes the next transmission data to the data D35 and the data D36, the data D35 in the frequency band A, the data D36 in the frequency band B, Both are transmitted simultaneously (174, 274). It is assumed that the terminal station has successfully received the data D36 but has failed to receive the data D35. The terminal station sends back the reception states in frequency band A and frequency band B as responses to both the frequency band A and frequency band B at the same time (184, 284). Here, it is assumed that the base station has successfully received the response 284 but has failed to receive the response 184.

  Since it becomes clear from the response 284 that the data D35 could not be received, the data distribution unit 331 transmits the data D35 simultaneously in both the frequency band A and the frequency band B (175, 275). Similarly, when data reception fails in any frequency band, the data that failed to be received are transmitted simultaneously in different frequency bands.

  FIG. 15 is a diagram illustrating an example of the content of the data retransmission processing determination in the example of FIG. Here, it is assumed that different data is distributed and transmitted by frequency band A and frequency band B. In the example of FIG. 14, when reception fails in one frequency band as in transmission 172 of data D33, data D33 is transmitted (173, 273) in both frequency band A and frequency band B. The determination in this case is as follows. First, when a response cannot be received in either frequency band A or frequency band B (step S941), it is not possible to determine whether transmission data is received. Is retransmitted (step S944). Note that, in step S941, step S944 is similarly performed when data transmission cannot be performed in either the frequency band A or the frequency band B as a result of the carrier sense.

  In addition, when it is found that any of the transmission data could not be received from the contents although the response could be received in either the frequency band A or the frequency band B (step S943), the data that could not be received is the frequency. Transmission is performed using both band A and frequency band B (step S946). Note that step S946 is executed in the same manner when data transmission cannot be performed in either the frequency band A or the frequency band B as a result of the carrier sense. On the other hand, when it is determined that all transmission data has been received (step S943), the next data is newly transmitted (step S945). If there is data that has been successfully received by the previous transmission due to retransmission, the success / failure determination in step S943 is performed including that data.

  FIG. 16 is a diagram illustrating another example of the content of the data retransmission processing determination in the example of FIG. Here, it is assumed that the same data is transmitted simultaneously in frequency band A and frequency band B. In the example of FIG. 14, there may occur a case where data is retransmitted by both frequency band A and frequency band B like transmissions 173 and 273 of data D33. The determination in this case is as follows. First, if a response cannot be received in either frequency band A or frequency band B (step S951), it cannot be determined whether or not transmission data can be received, so the same in frequency band A and frequency band B again. Data (failure data) is retransmitted simultaneously (step S954). In step S951, step S954 is executed in the same manner even when data transmission cannot be performed in either frequency band A or frequency band B as a result of carrier sense.

  In addition, when it is found that the response could be received in either frequency band A or frequency band B, but not all of the retransmit data was received from the contents (step S952), again frequency band A and frequency band B In step S954, the same data is retransmitted. On the other hand, when it is determined that retransmission data can be received in any frequency band (step S952), the next data is distributed and newly transmitted (step S955).

  Next, a configuration example of the wireless communication system according to the embodiment of the present invention will be described.

  FIG. 17 is a diagram illustrating a configuration example of a wireless communication system according to the embodiment of the present invention. The base station 23 connects to the network 30 through a network interface. As the network 30, for example, the Internet or an intranet can be assumed. The terminal stations 11 and 12 are connected to a computer or the like through a peripheral interface. The terminal stations 11 and 12 communicate with the base station 23 via a wireless transmission path or a transmission line of the power line 40 and access the network 30 via the base station 23.

  The terminal stations 11 and 12 and the base station 23 perform communication in the wireless transmission path via the respective antennas 14, 15 and 26, and the plugs 17, 18 and 29 are connected to the outlets 47, 48 and 49 of the power line 40. The communication on the transmission line of the power line 40 is performed by connecting to.

  For example, assuming that the base station 21 and the terminal station 11 can simultaneously transmit and receive via two transmission paths with the configuration of FIG. 2, transmission and reception are performed via a wireless transmission path conforming to the IEEE802.11g standard in the 2.4 GHz band, and power line 40 in the short wave band. It is assumed that transmission / reception is performed through this transmission path. At this time, between the base station 21 and the terminal station 11, data can be distributed and transmitted / received simultaneously through a 2.4 GHz band radio transmission path and a short wave band power line 40 transmission path.

  As described above, according to the embodiment of the present invention, transmission data is distributed by the data distribution unit 331 on the transmission device side and transmitted simultaneously by the transmission units 120 and 220 in different frequency bands, and different frequency bands on the reception device side. By combining the data received by the receiving units 110 and 210 by the data merging unit 371, efficient data communication using both the wireless transmission line and the power line transmission line can be realized.

  In the embodiment of the present invention, transmission is stopped on the transmitting side when the receiving side fails to receive data a predetermined number of times in succession, but instead of stopping transmission, it is more resistant to noise. You may make it transfer to modulation mode. In the embodiment of the present invention, the transmission is resumed when the transmission side has succeeded in receiving the response a predetermined number of times in the transmission suspension state, but the transmission is continued without stopping the transmission. In addition, when the response is successfully received a predetermined number of times in succession, the mode may be shifted to a modulation mode with less noise tolerance. Here, with regard to noise tolerance, a modulation mode with a modulation scheme 64QAM and a coding rate 3/4, a modulation scheme 64QAM with a modulation rate 2/3, a modulation scheme 16QAM with a modulation rate 3/4, Modulation mode 16QAM with modulation rate 1/2 and modulation method QPSK with modulation rate 3/4, modulation mode QPSK with modulation rate ½ with modulation rate BPSK, modulation method BPSK with modulation rate 3 In the order of modulation mode with / 4 and modulation mode BPSK with a coding rate of 1/2, the latter becomes higher in noise resistance.

  The embodiment of the present invention is an example for embodying the present invention and has a corresponding relationship with the invention-specific matters in the claims as shown below, but is not limited thereto. However, various modifications can be made without departing from the scope of the present invention.

  In other words, the data distribution means corresponds to the data distribution unit 331, for example. The data output means corresponds to, for example, the data output unit A315 and the data output unit B325. The transmission means corresponds to the transmission units 120 and 220, for example.

  Further, in claims 3, 4 and 6 to 13, the response discriminating means corresponds to, for example, the response discriminating unit A312 and the response discriminating unit B322.

  Further, in claim 15, data receiving means corresponds to the receiving units 110 and 210, for example. The data merging means corresponds to the data merging unit 371, for example.

  Further, in claim 16, the data discriminating means corresponds to, for example, the data discriminating unit A351 and the data discriminating unit B361. The response output means corresponds to, for example, the response output unit A352 and the response output unit B362.

  Further, in claim 17, the data distribution means corresponds to, for example, the data distribution unit 331. The data output means corresponds to, for example, the data output unit A315 and the data output unit B325. The transmission means corresponds to the transmission units 120 and 220, for example. The data receiving means corresponds to the receiving units 110 and 210, for example. The data merging means corresponds to the data merging unit 371, for example. The data discriminating means corresponds to, for example, the data discriminating unit A351 and the data discriminating unit B361. The response output means corresponds to, for example, the response output unit A352 and the response output unit B362.

  Further, in claims 18 to 20 and 22 to 24, the procedure for distributing transmission data corresponds to the processing in the data distribution unit 331, for example. The procedure for adding the distribution order to the distributed transmission data corresponds to the processing in the data output unit A315 and the data output unit B325, for example. A procedure for transmitting the distributed transmission data simultaneously through at least one wireless transmission path and at least one power line transmission path corresponds to, for example, processing in the transmission units 120 and 220.

  Further, in claims 21 and 25, the procedure for simultaneously receiving the distributed data to which the distribution order is added by at least one wireless transmission path and at least one power line transmission path corresponds to the processing in the receiving units 110 and 210, for example. To do. The procedure for merging the received data in accordance with the distribution order corresponds to the processing in the data merging unit 371, for example. The procedure for determining the data reception state for each of at least one wireless transmission path and at least one power line transmission path corresponds to, for example, processing in the data determination unit A351 and the data determination unit B361. The procedure for outputting the same response including the determination result of the data reception state for at least one wireless transmission line and at least one power line transmission line to all of the wireless transmission line and the power line transmission line is, for example, a response output unit A352 and a response output unit This corresponds to the processing in B362.

  The processing procedure described in the embodiment of the present invention may be regarded as a method having a series of these procedures, and a program for causing a computer to execute these series of procedures or a recording medium storing the program May be taken as

  As an application example of the present invention, for example, the present invention can be applied when communication is performed using both a wireless transmission line and a power line transmission line in a wireless communication system.

It is a figure which shows the outline | summary of the data distribution in embodiment of this invention. It is a figure which shows the structure of the terminal station or base station in embodiment of this invention. It is a figure which shows the structure of the receiving part 210 of the terminal station or base station in embodiment of this invention. It is a figure which shows the structure of the transmission part 220 of the terminal station or base station in embodiment of this invention. It is a figure which shows the function structure of the data transmission control function by the communication control part 300 in embodiment of this invention. It is a figure which shows the function structure of the data reception control function by the communication control part 300 in embodiment of this invention. It is a figure which shows the frame structure of the data packet in embodiment of this invention. It is a figure which shows the example of the data distribution in embodiment of this invention. It is a figure which shows the frame structure of the response packet in embodiment of this invention. It is a sequence chart which shows an example of operation | movement of the terminal station and base station in embodiment of this invention. It is a figure shown about the content of judgment of the data resending process in the example of FIG. It is a sequence chart which shows the other example of operation | movement of the terminal station and base station in embodiment of this invention. It is a figure shown about control of cancellation and resumption of transmission by counter A313 in an embodiment of the invention. It is a sequence chart which shows the further another example of operation | movement of the terminal station and base station in embodiment of this invention. It is a figure shown about an example of the content of the judgment of the data resending process in the example of FIG. It is a figure shown about the other example of the content of the judgment of the data resending process in the example of FIG. It is a figure which shows one structural example of the radio | wireless communications system in embodiment of this invention.

Explanation of symbols

11, 12 Terminal station 17, 18, 29 Plug 23 Base station 30 Network 40 Power line 47, 48, 49 Outlet 101 Antenna 103, 203 Switch 104, 204 Power amplifier 110, 210 Receiver 120, 220 Transmitter 201 Plug 202 Coupling 300 Communication control unit 331 Data distribution unit 332 Data buffer 340 Logical layer control unit 350 Memory 360 Physical layer interface 371 Data merge unit 372 Data buffer 400 Peripheral interface 310, 320 Distribution control unit 311, 321 Carrier sense unit 312, 322 Response discrimination Unit 313, 323 Counter 315, 325 Data output unit 350, 360 Merge control unit 351, 361 Data discrimination unit 352, 362 Response output unit

Claims (25)

Data distribution means for distributing transmission data;
Data output means for adding a distribution order to the distributed transmission data;
A transmission apparatus comprising: transmission means for simultaneously transmitting the distributed transmission data to which the distribution order is added by at least one wireless transmission line and at least one power line transmission line. 2. The transmission apparatus according to claim 1, wherein the data distribution unit distributes the transmission data so that the distributed transmission data are transmitted with substantially equal time lengths. Response determining means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line,
The data distribution means distributes so that the same transmission data as the previous transmission is retransmitted when it is determined by the response determination means that reception of any of the transmission data has failed in the previous data transmission. The transmission device according to claim 1. Response determining means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line,
The data distribution means, when it is determined by the response determination means that the reception of any of the transmission data failed in the previous data transmission, the transmission data related to the failure is simultaneously transmitted by the wireless transmission line and the power line transmission line. 2. The transmission apparatus according to claim 1, wherein distribution is performed so as to transmit. The transmitting means transmits the transmission data related to the failure in the same modulation mode as the modulation mode of the transmission path that successfully received the transmission data in the previous data transmission when transmitting the transmission data simultaneously through the wireless transmission line and the power line transmission line. The transmission apparatus according to claim 4, wherein Response determining means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line,
When the frequency determined by the response determination unit that reception of transmission data has failed in the previous data transmission exceeds a predetermined reference in the same transmission line, the data distribution unit thereafter transmits in the transmission line The transmission apparatus according to claim 1, wherein transmission data is distributed so as not to be performed. Response determining means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line,
The data distribution means, when it is determined by the response determination means that reception of transmission data in the previous data transmission has failed continuously for a predetermined number of times or more on the same transmission path, thereafter transmission on the transmission path is performed. The transmission apparatus according to claim 1, wherein transmission data is distributed so as not to be performed. Response determining means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line,
When the frequency at which the response determining unit has successfully received the response exceeds a predetermined reference in the same transmission line, the data distribution unit transmits the transmission data so as to perform transmission on the transmission line thereafter. The transmitter according to claim 1, wherein the transmitter is distributed. Response determining means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line,
The data distribution means, when it is determined by the response determination means that the response has been successfully received continuously for a predetermined number of times or more in the same transmission path, the transmission data is transmitted so as to perform transmission on the transmission path thereafter. The transmitter according to claim 1, wherein the transmitter is distributed. Response determining means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line,
When the frequency determined by the response determination unit that reception of transmission data has failed in the previous data transmission exceeds a predetermined reference in the same transmission line, the data distribution unit thereafter transmits in the transmission line The transmission apparatus according to claim 1, wherein the transmission data is distributed so as to be performed in a modulation mode having a higher noise tolerance. Response determining means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line,
The data distribution means, when it is determined by the response determination means that reception of transmission data in the previous data transmission has failed continuously for a predetermined number of times or more on the same transmission path, thereafter transmission on the transmission path is performed. The transmission apparatus according to claim 1, wherein the transmission data is distributed so as to be performed in a modulation mode having a higher noise tolerance. Response determining means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line,
The data distribution means, when the frequency determined by the response determination means that the response has been successfully received exceeds a predetermined standard in the same transmission path, thereafter transmission on the transmission path is less resistant to noise. The transmission apparatus according to claim 1, wherein transmission data is distributed so as to be performed in a modulation mode. Response determining means for determining a response to the previous data transmission for each of the wireless transmission line and the power line transmission line,
The data distribution means, when it is determined by the response determination means that the response has been successfully received more than a predetermined number of times in the same transmission path, thereafter, transmission on the transmission path is modulated with less noise tolerance. 2. The transmission apparatus according to claim 1, wherein transmission data is distributed so as to be performed according to a mode. It further comprises carrier sense means for reporting the availability of each transmission line prior to data transmission,
The transmission means does not perform the data transmission to the transmission path reported as not vacant by the carrier sense means, and determines that the vacancy is not started after starting the data transmission in a transmission path other than the transmission path. 2. The transmission apparatus according to claim 1, wherein the data transmission to the transmission path determined not to be free is not performed even when the transmission path is free. Data receiving means for simultaneously receiving data distributed and added with the distribution order by at least one wireless transmission line and at least one power line transmission line;
And a data merging means for merging the received data in accordance with the distribution order. Data discriminating means for discriminating a data reception state for each of the wireless transmission line and the power line transmission line;
16. The receiving apparatus according to claim 15, further comprising response output means for outputting the same response including all discrimination results by the data discrimination means to all of the wireless transmission line and the power line transmission line. A communication system including a transmission device and a reception device that perform wireless communication,
The transmission device includes at least one of data distribution means for distributing transmission data, data output means for adding a distribution order to the distributed transmission data, and at least one of the distributed transmission data to which the distribution order is added. Transmission means for transmitting by one wireless transmission line and at least one power line transmission line,
The receiving apparatus includes: a data receiving unit that simultaneously receives the data to which the distribution order is added through the wireless transmission line and the power line transmission line; a data merging unit that merges the received data according to the distribution order; Data discriminating means for discriminating the data reception state for each transmission path and power line transmission path, and outputting the same response including all discrimination results by the data discriminating means to the apparatus apparatus by all of the radio transmission path and the power line transmission path And a response output means. A procedure for distributing the transmitted data;
Adding a distribution order to the distributed transmission data;
A processing method comprising: transmitting the distributed transmission data to which the distribution order is added simultaneously using at least one wireless transmission line and at least one power line transmission line. A procedure for distributing the transmitted data;
Adding a distribution order to the distributed transmission data;
A procedure of transmitting the distributed transmission data to which the distribution order is added simultaneously by at least one wireless transmission line and at least one power line transmission line;
And a procedure for distributing the transmission data so that the same transmission data as that of the transmission is retransmitted when reception of the transmission data fails in any one of the wireless transmission line and the power line transmission line. Method. A procedure for distributing the transmitted data;
Adding a distribution order to the distributed transmission data;
A procedure of transmitting the distributed transmission data to which the distribution order is added simultaneously by at least one wireless transmission line and at least one power line transmission line;
A procedure for distributing the data related to the failure so as to be simultaneously transmitted through the wireless transmission line and the power line transmission line when reception of the transmission data fails in any one of the wireless transmission line and the power line transmission line; The processing method characterized by comprising. A procedure of simultaneously receiving at least one wireless transmission line and at least one power line transmission line data distributed and added with the distribution order;
Merging the received data according to the distribution order;
A procedure for determining a data reception state for each of the wireless transmission line and the power line transmission line,
And a procedure for outputting the same response including the determination result of the data reception state for each of the wireless transmission line and the power line transmission line to all of the wireless transmission line and the power line transmission line. A procedure for distributing the transmitted data;
Adding a distribution order to the distributed transmission data;
A program for causing a computer to execute a procedure of simultaneously transmitting the distributed transmission data to which the distribution order is added through at least one wireless transmission path and at least one power line transmission path. A procedure for distributing the transmitted data;
Adding a distribution order to the distributed transmission data;
A procedure of transmitting the distributed transmission data to which the distribution order is added simultaneously by at least one wireless transmission line and at least one power line transmission line;
When the transmission data in any one of the wireless transmission line and the power line transmission line fails to receive the transmission data, the computer is caused to execute a procedure for distributing the same transmission data as the transmission to be retransmitted. Program to do. A procedure for distributing the transmitted data;
Adding a distribution order to the distributed transmission data;
A procedure of transmitting the distributed transmission data to which the distribution order is added simultaneously by at least one wireless transmission line and at least one power line transmission line;
A procedure for distributing the data related to the failure so as to be simultaneously transmitted through the wireless transmission line and the power line transmission line when reception of the transmission data fails in any one of the wireless transmission line and the power line transmission line; A program characterized by being executed by a computer. A procedure of simultaneously receiving at least one wireless transmission line and at least one power line transmission line data distributed and added with the distribution order;
Merging the received data according to the distribution order;
A procedure for determining a data reception state for each of the wireless transmission line and the power line transmission line,
A program for causing a computer to execute a procedure of outputting the same response including a determination result of a data reception state for each of the wireless transmission line and the power line transmission line to all of the wireless transmission line and the power line transmission line.

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