WO2022190588A1 - 受信装置および通信システム - Google Patents
受信装置および通信システム Download PDFInfo
- Publication number
- WO2022190588A1 WO2022190588A1 PCT/JP2021/048926 JP2021048926W WO2022190588A1 WO 2022190588 A1 WO2022190588 A1 WO 2022190588A1 JP 2021048926 W JP2021048926 W JP 2021048926W WO 2022190588 A1 WO2022190588 A1 WO 2022190588A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hint information
- signal data
- information
- receiving
- reception processing
- Prior art date
Links
- 238000004891 communication Methods 0.000 title claims abstract description 57
- 238000012545 processing Methods 0.000 claims abstract description 156
- 230000005540 biological transmission Effects 0.000 claims abstract description 71
- 239000000284 extract Substances 0.000 claims abstract description 28
- 238000000605 extraction Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims description 66
- 238000012937 correction Methods 0.000 claims description 43
- 230000000717 retained effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 40
- 230000000694 effects Effects 0.000 description 12
- 238000001514 detection method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 11
- 230000033001 locomotion Effects 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000012804 iterative process Methods 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1864—ARQ related signaling
Definitions
- This technology relates to a receiving device. More specifically, it relates to a communication system for wireless communication and a receiving device thereof.
- Error correction codes and signal processing are used to improve communication performance in wireless communication. Also, in two-way communication, a method of improving the reception success rate by automatic repeat request (ARQ) is known. On the other hand, in one-way communication, for example, a method of transmitting the same information multiple times to improve communication performance has been proposed (see Patent Document 1, for example).
- the conventional technology described above has the problem that the amount of arithmetic processing in the receiving device increases due to error correction, signal processing, and the like. Further, when the same information is transmitted multiple times in one-way communication, it becomes necessary to allocate an extra communication band to each communication line, including another line.
- This technology was created in view of this situation, and aims to improve the communication performance of wireless communication while suppressing the amount of arithmetic processing of the receiving device.
- the present technology has been made to solve the above-described problems.
- the receiving apparatus includes an extraction circuit and a reception processing circuit that reads out the past signal data held in the memory based on the hint information and performs predetermined reception processing. This brings about an effect of performing reception processing on the past signal data based on the hint information.
- the reception processing circuit performs error correction processing as the predetermined reception processing
- the memory holds data in the middle of the error correction processing as the past signal data
- the The hint information extracting circuit extracts, as the hint information, information indicating whether or not the transmission was performed at the timing of the past signal data, and if the transmission was performed at the timing of the past signal data, the reception.
- the processing circuit may be caused to continue the error correction process. This brings about an effect of performing error correction processing on the past signal data based on the hint information.
- the hint information extracting circuit extracts information on backoff of the past signal data as the hint information, and performs the reception process on the signal data at the timing corresponding to the information on the backoff.
- a circuit may be caused to perform the predetermined reception processing. This brings about an effect of performing reception processing according to the information about the backoff for the past signal data based on the hint information.
- the hint information extracting circuit extracts information about the amount of deviation in the time direction of the past signal data as the hint information, and determines the timing according to the information about the amount of deviation in the time direction.
- the reception processing circuit may be caused to perform the predetermined reception processing on the signal data. This brings about the effect of performing the reception process according to the information about the amount of deviation in the time direction.
- the hint information extracting circuit extracts information on the sequence number of the past signal data as the hint information, and performs the reception processing on the signal data at the timing corresponding to the information on the sequence number.
- a circuit may be caused to perform the predetermined reception processing. This brings about the effect of performing reception processing according to the information about the sequence number.
- the hint information extracting circuit extracts, as the hint information, information on the moving speed of the transmitting device that has transmitted the past signal data,
- the reception processing may be performed by the reception processing circuit. This brings about the effect of performing the reception process according to the information about the moving speed.
- the hint information extracting circuit extracts information on part of the payload of the past signal data as the hint information, and uses the information on the part of the payload as known data for the predetermined
- the reception processing may be performed by the reception processing circuit. This brings about an effect of performing reception processing as known data on the information related to part of the payload.
- the hint information extraction circuit further extracts information indicating validity of the hint information, and the information indicating validity of the hint information indicates that the hint information is valid.
- the hint information may be extracted when the This brings about the effect of determining whether or not the hint information should be referred to.
- a second aspect of the present technology includes a transmission device, a memory that holds past signal data transmitted from the transmission device, a hint information extraction circuit that extracts hint information from newly received signal data, a plurality of receivers each having a reception processing circuit for reading out the past signal data held in the memory based on the hint information and performing predetermined reception processing; and a server for acquiring information and supplying it to other receiving devices of the plurality of receiving devices.
- a third aspect of the present technology is a transmission device, a plurality of reception devices each including a hint information extraction circuit for extracting hint information from newly received signal data, and past signals received by the reception devices.
- a memory for holding data, and reception for acquiring the hint information from any one of the plurality of receiving devices, reading out the past signal data held in the memory based on the hint information, and performing predetermined reception processing.
- a communication system comprising a server comprising a processing circuit. This brings about an effect that the hint information is shared by a plurality of receiving devices and the reception processing is performed by the server.
- FIG. 20 is a flow chart showing an example of a processing procedure of the receiving device 100 according to the sixth embodiment of the present technology;
- FIG. 20 is a flow chart showing an example of a processing procedure of the receiving device 100 according to the seventh embodiment of the present technology;
- FIG. 20 is a flow chart showing an example of a processing procedure of the receiving device 100 according to the seventh embodiment of the present technology;
- FIG. 1 is a diagram showing an example of the overall configuration of a communication system according to the first embodiment of the present technology.
- This communication system includes a receiving device 100 and a transmitting device 200.
- the transmitting device 200 is a communication device that transmits signals
- the receiving device 100 is a communication device that receives signals.
- Transmitting apparatus 200 transmits signals via antenna 209 and receiving apparatus 100 receives signals via antenna 109 .
- one receiving device 100 and one transmitting device 200 are shown in this example, a plurality of each may be provided.
- FIG. 2 is a diagram showing a configuration example of the receiving device 100 according to the first embodiment of the present technology.
- This receiving device 100 includes an RF circuit 110 , an ADC 120 , a memory 130 , a reception processing circuit 140 , a hint information extraction circuit 150 and a control circuit 160 .
- An RF (Radio Frequency) circuit 110 is a high frequency circuit that converts a carrier signal received via an antenna 109 into an intermediate frequency signal.
- the RF circuit 110 includes a low noise amplifier (LNA), a phase locked loop (PLL), a mixer, a low pass filter (LPF), and the like.
- LNA low noise amplifier
- PLL phase locked loop
- LPF low pass filter
- An ADC (Analog-to-Digital Converter) 120 converts the output of the RF circuit 110 from an analog signal to a digital signal.
- the memory 130 is a memory that holds signal data converted into digital signals. This memory 130 is read based on hint information extracted from the signal data received later, as will be described later.
- the reception processing circuit 140 performs predetermined reception processing on the signal data.
- the reception processing circuit 140 performs, for example, demodulation processing and error correction as reception processing.
- the hint information extraction circuit 150 extracts hint information from the signal data that has undergone reception processing by the reception processing circuit 140 .
- the control circuit 160 instructs the reception processing circuit 140 to perform reception processing based on the hint information extracted by the hint information extraction circuit 150 .
- FIG. 3 is a diagram illustrating a format configuration example of signal data according to the first embodiment of the present technology.
- hint information 712 is added to payload 719 in signal data.
- This hint information 712 is information for receiving data transmitted in the past.
- the reception processing circuit 140 reads the past signal data held in the memory 130 based on the hint information 712 attached to the successfully received signal data, and performs reception processing.
- the data transmission start time (transmission timing) is assigned to the transmission device 200 in advance, and the communication adopts an error correction code that improves the error correction capability by increasing the number of iterations of the process.
- LDPC Low Density Parity Check
- FIG. 4 is a diagram showing a utilization example of the hint information 712 according to the first embodiment of the present technology.
- hint information 712 a flag indicating "whether or not data was transmitted at the previous transmission timing" is added.
- Receiving apparatus 100 retains in memory 130 data that has undergone iterative error correction processing when error correction fails.
- the receiving device 100 fails to receive data at a certain timing t and succeeds in receiving data at the next timing t+1, the receiving device 100 indicates that “the transmitting device 200 transmitted data at the timing t” based on the hint information 712 acquired at the timing t+1.
- the data at the timing t is read from the memory 130 .
- error correction repetition processing is additionally performed for the reception processing at the timing t.
- FIG. 5 is a flow chart showing a processing procedure example of the receiving device 100 according to the first embodiment of the present technology.
- the reception processing circuit 140 performs reception processing and repeats error correction processing (step S911). As a result, if error correction succeeds (step S912: Yes), the reception process at timing t succeeds (step S918).
- step S912 if the error correction fails (step S912: No), the data in process is held in the memory 130, and the reception process is completed at the next timing t+1 (step S913).
- step S914 If the reception processing at the next timing t+1 succeeds and the hint information 712 indicates that "the transmission device 200 transmitted data at the timing t" (step S914: Yes), the reception processing circuit 140 repeats the error correction. The processing is continued (step S916). As a result, if error correction succeeds (step S917: Yes), the reception process at timing t succeeds (step S918).
- Step S914 if the hint information 712 does not indicate that "transmitting apparatus 200 has transmitted data at timing t", or if reception processing at timing t+1 has failed in the first place (step S914: No), or if error correction has failed (Step S917: No), the reception process at timing t has failed (Step S919).
- the iterative process of error correction of the data at the previous transmission timing continues. I do.
- communication performance can be improved while suppressing the occupied communication band and the amount of arithmetic processing in the receiving apparatus 100 .
- FIG. 6 is a diagram showing a configuration example of the receiving device 100 in the modified example of the first embodiment of the present technology.
- the output data of the ADC 120 and the data during the iteration of the error correction process are held in the memory 130, but other data may be held.
- the output data of the filter 143 in the reception processing circuit 140, the output data of the decimation processing unit 144, the data subjected to frequency correction, other time correction, phase correction, etc. in the frequency correction unit 142, the data after noise removal, etc. may be held in memory 131 or 132 .
- signal data of a smaller size may be held by selecting signal data to be held in the memory according to the accuracy of reception processing. For example, according to the detection strength of the preamble detected by the preamble detection unit 141, if the detection strength is strong, the data after preamble detection is held, and if the detection strength is weak, the data before preamble detection is held. be done. This makes it possible to reduce the amount of memory used while suppressing deterioration in communication performance.
- Second Embodiment> a communication system in which the transmission device 200 performs carrier sense before transmitting data and shifts the transmission timing (backoff) when it detects that another device is communicating.
- backoff transmission timing
- the arithmetic processing amount is reduced. increases excessively.
- the receiving device 100 holds the received signal data in the memory 130 for a certain period of time. Transmitting apparatus 200 transmits a flag indicating whether backoff has occurred or a value indicating the time of backoff for data transmitted in the past as hint information 712 in transmission data. When receiving notification from transmitting apparatus 200 that a backoff has occurred in past transmission data, receiving apparatus 100 extracts signal data at a timing considering the backoff from the signal data held in memory 130, and Perform reception processing. As a result, communication performance can be improved without excessively increasing the amount of arithmetic processing in the receiving apparatus 100 .
- FIG. 7 is a flow chart showing a processing procedure example of the receiving device 100 according to the second embodiment of the present technology.
- the receiving device 100 receives the signal data (step S921), holds it in the memory 130 for a certain period of time, and waits for reception of signal data at the next timing (step S923).
- step S924 when it is notified that backoff has occurred in the past transmission data (step S924: Yes), the reception processing circuit 140 is instructed by the control circuit 160 to retrieves the signal data at the timing considering the backoff from the memory 130 (step S925), and performs reception processing (step S927). On the other hand, if the occurrence of backoff is not notified (step S924: No), the signal data of the timing not considering the backoff is taken out from the memory 130 (step S926), and reception processing is performed (step S927).
- the hint information 712 when the hint information 712 notifies that a backoff has occurred in the past transmission data, reception processing is performed on the signal data at the timing considering the backoff. conduct. As a result, communication performance can be improved while suppressing the occupied communication band and the amount of arithmetic processing in the receiving apparatus 100 .
- transmission data includes a value indicating the amount of deviation in the time direction of the transmission timing of data transmitted in the past by the transmission device 200 .
- the transmission device 200 transmits data at a certain transmission timing, such as when the GPS reception environment changes from bad to good conditions. It may be possible to detect clock deviation.
- transmitting apparatus 200 can include the amount of deviation in the time direction of the past transmission timing as hint information 712 in part of the transmission data.
- the receiving apparatus 100 holds the received signal data in the memory 130 for a certain period of time, and when the hint information 712 informs the amount of deviation in the time direction from the reception process at the timing at which the reception failed, the data is held.
- the received signal data is taken out in consideration of the amount of deviation in the time direction, and the reception process is retried.
- the receiving apparatus 100 can improve communication performance without speculatively performing reception processing assuming a shift in the time direction and without increasing the amount of calculation processing.
- FIG. 8 is a flowchart showing a processing procedure example of the receiving device 100 according to the third embodiment of the present technology.
- the reception processing circuit 140 performs reception processing (step S931). As a result, if the reception process succeeds (step S932: Yes), the reception process at timing t succeeds (step S938).
- step S932 if the reception process fails (step S932: No), the received data is held in the memory 130 and the reception process is completed at the next timing t+1 (step S933).
- step S934 If the reception process at the next timing t+1 succeeds and the hint information 712 of the "shift amount in the time direction of the timing t" is notified (step S934: Yes), the reception processing circuit 140 receives the shift amount in the time direction. In consideration of this, the signal data that has been held is extracted from the memory 130 (step S935), and the reception process is retried (step S936). As a result, if the reception process succeeds (step S937: Yes), the reception process at timing t succeeds (step S938).
- step S934 if the hint information 712 does not indicate the "shift amount in the time direction of the timing t" (step S934: No), or if the reception process fails to retry (step S937: No), the reception process at the timing t is It means that it has failed (step S939).
- the hint information 712 when the hint information 712 notifies the amount of deviation of the previous transmission timing in the time direction, the previous reception process is retried. As a result, communication performance can be improved while suppressing the occupied communication band and the amount of arithmetic processing in the receiving apparatus 100 .
- a value indicating the amount of deviation in the frequency direction may be included in the transmission data as the hint information 712 .
- Fourth Embodiment> a communication system is assumed in which the transmitting device 200 performs carrier sense before transmitting data, and does not transmit when it detects that another device is communicating.
- Receiving apparatus 100 holds received signal data in memory 130 for a certain period of time, and transmitting apparatus 200 includes a sequence number that is incremented by one each time data is transmitted as hint information 712 in transmission data.
- Receiving device 100 detects that there is transmission data that has failed to be received between the two transmission data by checking whether the sequence numbers included in the two transmission data that have been successfully received have changed by 2 or more. can do. If there is such data, the signal data of the transmission timing between the two transmission data is extracted from the signal data held in the memory 130, and the reception processing is performed by, for example, increasing the number of iterations of the error correction processing more than usual. I do. As a result, the receiving apparatus 100 performs reception processing with a large amount of arithmetic processing only on signal data at the timing at which the transmitting apparatus 200 is highly likely to have transmitted data, thereby suppressing an increase in the overall amount of arithmetic processing and improving communication performance. can be improved.
- FIG. 9 is a flowchart showing a processing procedure example of the receiving device 100 according to the fourth embodiment of the present technology.
- the receiving device 100 receives the signal data (step S941), holds it in the memory 130 for a certain period of time, and waits for reception of signal data at the next timing (step S943).
- step S944 if it is found that the sequence number has changed by 2 or more from the past transmission data (step S944: Yes), the control circuit 160 In response to the instruction, the reception processing circuit 140 retrieves the signal data of the transmission timing between the two pieces of transmission data from the memory 130 (step S945), and performs reception processing (step S947). On the other hand, if the sequence number has not changed by 2 or more (step S944: No), the processing proceeds assuming that there is no transmission data for which reception has failed.
- the transmission data further includes a flag indicating whether the hint information 712 is valid or invalid in the fifth embodiment.
- FIG. 10 is a diagram illustrating a format configuration example of signal data according to the fifth embodiment of the present technology.
- a hint information 712 field is provided for the payload 719, and a hint information valid flag 711 field indicating whether the hint information 712 is valid is provided.
- the transmitting apparatus 200 when transmitting apparatus 200 includes hint information 712 in transmission data, it is conceivable that, for example, there is no data transmitted in the past due to the initial transmission, or hint information 712 cannot be generated for some reason. be done. In such a case, by including a hint information valid flag 711 indicating whether the hint information 712 is valid or invalid in the transmission data, the transmitting apparatus 200 can notify the receiving apparatus 100 whether the hint information 712 is valid or not. to notify you. Receiving device 100 determines whether or not to refer to hint information 712 by referring to hint information valid flag 711 .
- the signal data includes a hint information valid flag 711 field indicating whether the hint information 712 is valid. This allows receiving apparatus 100 to correctly determine whether or not to refer to hint information 712 .
- ⁇ is the output frequency of the transmitting device 200
- V is the moving speed of the transmitting device 200
- c is the speed of light
- ⁇ is the angle of the moving direction of the transmitting device 200 as seen from the receiving device 100
- ⁇ ′ is observed by the receiving device 100. is the frequency at which
- the receiving device 100 obtains the frequency correction amount ( ⁇ ′) from the moving speed of the transmitting device 200 at that time for data transmitted in the past, sets it as a preset value of the frequency correction amount, and executes the receiving process again. Thereby, the probability of success of the reception process can be improved.
- FIG. 11 is a flowchart showing a processing procedure example of the receiving device 100 according to the sixth embodiment of the present technology.
- the receiving device 100 receives the signal data (step S951), holds it in the memory 130 for a certain period of time, and waits for reception of signal data at the next timing (step S953).
- step S954 when the movement speed V of the transmission device 200 at that time is notified for the past transmission data (step S954: Yes), the frequency correction amount is calculated from the above equation. ( ⁇ - ⁇ ') is obtained (step S955). Then, the obtained frequency correction amount is set as a preset value, and the reception process is executed again (step S957).
- the sixth embodiment of the present technology by notifying the moving speed of the transmitting device 200 as the hint information 712 and performing the frequency correction in the receiving device 100 and executing the reception process again, The success probability of reception processing can be improved.
- the transmitting device 200 notifies part of the payload transmitted by the transmitting device 200 in the past as the hint information 712 .
- receiving apparatus 100 can increase the amount of known data used for correlation calculation, improve detection performance, and re-execute receiving processing.
- the pilot pattern is detected by obtaining the peak position of the correlation value between the known pattern information and the actually received signal.
- the more known pattern information the better the detection performance. Therefore, by notifying receiving apparatus 100 of part of the payload of past transmission data in hint information 712, receiving apparatus 100 increases the number of known patterns used for correlation calculation, improves detection performance, and performs reception processing. Can be re-executed.
- the logarithmic likelihood ratio of received strength is used as a value indicating the reliability of each bit.
- the reliability value for known data with a sufficiently large value
- the error correction capability for unknown data can be improved. Therefore, by notifying the receiver 100 of part of the payload of the past transmission data in the hint information 712, the known data is increased, and by replacing the reliability value with a large value, the error correction for the unknown data is performed. The receiving process can be re-executed with increased capacity.
- FIG. 12 is a flow chart showing a processing procedure example of the receiving device 100 according to the seventh embodiment of the present technology.
- the receiving device 100 receives the signal data (step S961), holds it in the memory 130 for a certain period of time, and waits for reception of signal data at the next timing (step S963).
- step S964 when part of the payload of the past transmission data is notified (step S964: Yes), reception processing is performed using part of the payload. Execute again (step S967). For example, the number of known patterns used for correlation calculation is increased, or the reliability value is replaced with a larger value, and the receiving process is re-executed.
- the seventh embodiment of the present technology by notifying receiving apparatus 100 of part of the payload of past transmission data in hint information 712, performance of pilot pattern detection and error correction processing can be improved. It can be improved and the reception process can be re-executed.
- hint information 712 is shared by a plurality of receiving devices in a communication system in which a plurality of receiving devices are connected to a cloud.
- FIG. 13 is a diagram illustrating an example of the overall configuration of a communication system according to the eighth embodiment of the present technology.
- the transmitting device 20 is a communication device that transmits signals, and the receiving devices A, B and C (11 to 13) are communication devices that receive signals. Although three receivers 11 to 13 are shown here, the number may be four or more.
- the transmitting device 20 moves, even if the transmitting device 20 exists in the coverage area of the receiving device A11 at a certain transmission timing, the transmitting device 20 will be in the coverage area of another receiving device B12 at the next transmission timing. There may be cases where it does exist.
- the transmitting device 20 includes hint information 712 for receiving previously transmitted data in the transmitted data.
- the receivers 11 to 13 hold the received signal data in the memory 130 for a certain period of time.
- the receiving devices 11 to 13 are connected to the cloud server 40 via the network 30.
- the cloud server 40 receives the reception result of communication with the transmitting device 20 and the hint information 712 from the receiving devices 11 to 13 .
- the hint information 712 included in the data successfully received by each of the receiving devices 11 to 13 is shared via the cloud server 40, whereby the transmission timing indicated by the hint information 712 is obtained. Additional reception processing can be performed in the receiver covering the coverage area where the transmitter 20 was located in .
- the receiving devices 11 to 13 notify the cloud server 40 of a flag indicating whether or not the receiving process at each timing was successful, and the hint information 712 obtained when the reception was successful.
- the cloud server 40 notifies and adds the hint information 712 to each of the receiving devices 11 to 13. command to perform reception processing.
- the cloud server 40 notifies the receiving devices 11 to 13 of the hint information 712 and the additional receiving processing instruction, the receiving devices 11 to 13 extract the target timing signal data from the memory 130 and perform the additional receiving processing.
- FIG. 14 is a sequence diagram showing an example of the flow of processing in the first example of the eighth embodiment of the present technology.
- the transmitting device 20 transmits transmission data and hint information 712 to the receiving devices 11 to 13 (810).
- reception from the transmission device 20 has failed in all of the reception devices 11 to 13 .
- each of the receiving devices 11 to 13 notifies the cloud server 40 of reception failure while retaining the signal data in the memory 130 (811 to 813).
- the transmitting device 20 transmits the next transmission data and hint information 712 to the receiving devices 11 to 13 (820).
- the receivers A11 and C13 notify the cloud server 40 of reception failure while retaining the signal data in the memory 130 (821, 823).
- the receiving device B12 notifies the cloud server 40 of the successful reception and the hint information 712 (822), and performs reception processing (832).
- the cloud server 40 transmits the hint information 712 to the receiving devices A11 and C13 (834).
- the receivers A11 and C13 use the hint information received from the cloud server 40 to perform additional reception processing on the past signal data (831, 833).
- FIG. 15 is a sequence diagram showing an example of the flow of processing in the second example of the eighth embodiment of the present technology.
- the transmitting device 20 transmits transmission data and hint information 712 to the receiving devices 11 to 13 (850).
- reception from the transmission device 20 has failed in all of the reception devices 11 to 13 .
- each of the receiving devices 11 to 13 notifies the cloud server 40 of reception failure while retaining the signal data in the memory 130 (851 to 853). This point is the same as the first example described above.
- the transmitting device 20 transmits the next transmission data and hint information 712 to the receiving devices 11 to 13 (860).
- the receiving device B12 notifies the cloud server 40 of the signal data and the hint information 712 (862).
- the receiving devices A11 and C13 notify the cloud server 40 of reception failure (861, 863).
- the cloud server 40 uses the hint information 712 from the receiving device B12 to perform additional reception processing (864).
- all the receiving devices 11 to 13 share the hint information 712 regarding the timing of reception failure.
- additional reception processing can be performed using the hint information 712 in the reception devices 11 to 13 or the cloud server 40 .
- the processing procedure described in the above embodiment may be regarded as a method having a series of procedures, and a program for causing a computer to execute the series of procedures or a recording medium for storing the program You can catch it.
- this recording medium for example, CD (Compact Disc), MD (MiniDisc), DVD (Digital Versatile Disc), memory card, Blu-ray disc (Blu-ray (registered trademark) Disc), etc. can be used.
- the present technology can also have the following configuration.
- a memory that holds past signal data; a hint information extraction circuit for extracting hint information from newly received signal data; a reception processing circuit that reads out the past signal data held in the memory based on the hint information and performs predetermined reception processing.
- the reception processing circuit performs error correction processing as the predetermined reception processing; the memory holds data in the middle of the error correction process as the past signal data;
- the hint information extraction circuit extracts, as the hint information, information as to whether or not transmission was performed at the timing of the past signal data, and if transmission was performed at the timing of the past signal data, the The receiving device according to (1) above, which causes a reception processing circuit to continue the error correction processing.
- the hint information extracting circuit extracts information on the backoff of the past signal data as the hint information, and causes the reception processing circuit to receive the signal data at the timing corresponding to the information on the backoff.
- the receiving device according to (1) which causes the processing to be performed.
- the hint information extraction circuit extracts, as the hint information, information relating to the amount of deviation in the time direction of the past signal data, and performs the reception process on the signal data at the timing corresponding to the information relating to the amount of deviation in the time direction.
- the receiving device according to (1) which causes a circuit to perform the predetermined receiving process.
- the hint information extraction circuit extracts information about the sequence number of the past signal data as the hint information, and instructs the reception processing circuit to receive the signal data at the timing corresponding to the information about the sequence number.
- the receiving device according to (1) which causes the processing to be performed.
- the hint information extracting circuit extracts, as the hint information, information about the moving speed of the transmitting device that has transmitted the past signal data, and performs the predetermined receiving process according to the information about the moving speed.
- the hint information extracting circuit extracts information about a part of the payload of the past signal data as the hint information, and uses the information about the part of the payload as known data to perform the predetermined reception process as the reception process.
- the receiving device wherein the circuit is caused to perform.
- the hint information extraction circuit further extracts information indicating the validity of the hint information, and if the information indicating the validity of the hint information indicates that the hint information is valid, the hint
- the receiving device according to any one of (1) to (7), which extracts information.
- a transmitting device a memory for holding past signal data transmitted from the transmitting device; a hint information extraction circuit for extracting hint information from newly received signal data; and the past held in the memory based on the hint information.
- a communication system comprising: a server that acquires the hint information from any one of the plurality of receiving devices and supplies the hint information to other receiving devices of the plurality of receiving devices. (10) a transmitting device; a plurality of receiving devices each having a hint information extraction circuit for extracting hint information from newly received signal data; a memory for holding past signal data received by the receiving device; and the past signal data obtained from any one of the plurality of receiving devices and held in the memory based on the hint information.
- a communication system comprising a server comprising a reception processing circuit for reading out and performing predetermined reception processing.
- Receiving Device 20 Transmitting Device 30 Network 40 Cloud Server 100
- reception processing circuit 141 preamble detection unit 142
- frequency correction unit 143 filter 144 decimation processing unit 150
- hint information extraction circuit 160 control circuit 200 transmitter 209 antenna 711 hint information valid flag 712 hint information 719 payload
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Communication Control (AREA)
Abstract
Description
1.第1の実施の形態(送信の有無をヒント情報として通知する例)
2.第2の実施の形態(バックオフの発生の有無をヒント情報として通知する例)
3.第3の実施の形態(送信タイミングの時間方向のずれ量をヒント情報として通知する例)
4.第4の実施の形態(シーケンス番号をヒント情報として通知する例)
5.第5の実施の形態(ヒント情報有効フラグをヒント情報として通知する例)
6.第6の実施の形態(送信装置の移動速度をヒント情報として通知する例)
7.第7の実施の形態(過去に送信したペイロードの一部をヒント情報として通知する例)
8.第8の実施の形態(クラウドを介してヒント情報を複数の受信装置によって共有する例)
[通信システムの構成]
図1は、本技術の第1の実施の形態における通信システムの全体構成の一例を示す図である。
図2は、本技術の第1の実施の形態における受信装置100の構成例を示す図である。
図3は、本技術の第1の実施の形態における信号データのフォーマット構成例を示す図である。
図4は、本技術の第1の実施の形態におけるヒント情報712の活用例を示す図である。
図5は、本技術の第1の実施の形態における受信装置100の処理手順例を示す流れ図である。
図6は、本技術の第1の実施の形態の変形例における受信装置100の構成例を示す図である。
この第2の実施の形態では、送信装置200がデータを送信する前にキャリアセンスを行い、他の機器が通信中であることを検知したときに送信タイミングをずらす(バックオフ)ような通信システムを想定する。このような通信システムでは、バックオフの発生率が低く、通常はバックオフが発生しないと想定できる場合においては、受信装置100においてバックオフを想定して投機的に受信処理を行うと演算処理量を過剰に増大させてしまう。
図7は、本技術の第2の実施の形態における受信装置100の処理手順例を示す流れ図である。
この第3の実施の形態では、送信装置200が過去に送信したデータの送信タイミングの時間方向のずれ量を示す値を送信データに含めるような通信システムを想定する。送信装置200がGPS(Global Positioning System)に時刻同期している場合は、GPSの受信環境が悪条件から良条件に変化した場合など、送信装置200がある送信タイミングのデータを送信した後に自身の時計のずれを検知できる場合がある。この場合、送信装置200は送信データの一部に過去の送信タイミングの時間方向のずれ量をヒント情報712として含めることができる。
図8は、本技術の第3の実施の形態における受信装置100の処理手順例を示す流れ図である。
送信装置200がGPS時計によりRF周波数などの周波数補正を行っているような場合は、ヒント情報712として周波数方向のずれ量を示す値を送信データに含めるようにしてもよい。
この第4の実施の形態では、送信装置200がデータを送信する前にキャリアセンスを行い、他の機器が通信中であることを検知したときは送信をしないような通信システムを想定する。受信装置100は、受信した信号データを一定時間だけメモリ130に保持しておき、送信装置200はデータを送信する毎に1つずつインクリメントするシーケンス番号をヒント情報712として送信データに含める。
図9は、本技術の第4の実施の形態における受信装置100の処理手順例を示す流れ図である。
上述の各実施の形態ではヒント情報712を送信データに含めていたが、この第5の実施の形態ではヒント情報712が有効であるか無効であるかを示すフラグをさらに送信データに含める。
図10は、本技術の第5の実施の形態における信号データのフォーマット構成例を示す図である。
この第6の実施の形態では、送信装置200がヒント情報712として送信装置200の移動速度を通知する通信システムを想定する。この場合、受信装置100は次式によりドップラー効果を考慮した補正を行った上で受信処理を行うことができる。
図11は、本技術の第6の実施の形態における受信装置100の処理手順例を示す流れ図である。
この第7の実施の形態では、送信装置200がヒント情報712として送信装置200が過去に送信したペイロードの一部を通知する。これにより、受信装置100は相関計算に使用する既知のデータを増加させ、検出性能を向上させて受信処理を再実行することができる。
図12は、本技術の第7の実施の形態における受信装置100の処理手順例を示す流れ図である。
この第8の実施の形態では、複数の受信装置がクラウドに接続されている通信システムにおいて、複数の受信装置によりヒント情報712を共有することを想定する。
図13は、本技術の第8の実施の形態における通信システムの全体構成の一例を示す図である。
この第8の実施の形態の第1の例では、受信装置11乃至13の各々が受信に成功したデータに含まれるヒント情報712をクラウドサーバ40を通じて共有することにより、ヒント情報712が示す送信タイミングにおいて送信装置20が存在したカバーエリアを担う受信装置において追加の受信処理を行うことができる。
上述の第1の例では各受信装置において個別に受信処理を行うことを想定したが、この第2の例ではクラウドサーバ40においてまとめて受信処理を行うことを想定する。すなわち、クラウドサーバ40は全ての受信装置A11およびC13で受信に失敗したタイミングについてヒント情報712が得られた場合は、追加の受信処理をクラウドサーバ40上で行う。
(1)過去の信号データを保持するメモリと、
新たに受信した信号データからヒント情報を抽出するヒント情報抽出回路と、
前記ヒント情報に基づいて前記メモリに保持された前記過去の信号データを読み出して所定の受信処理を行う受信処理回路と
を具備する受信装置。
(2)前記受信処理回路は、前記所定の受信処理として誤り訂正処理を行い、
前記メモリは、前記過去の信号データとして前記誤り訂正処理の途中のデータを保持し、
前記ヒント情報抽出回路は、前記ヒント情報として前記過去の信号データのタイミングで送信が行われたか否かの情報を抽出し、前記過去の信号データのタイミングで送信が行われていた場合には前記受信処理回路に前記誤り訂正処理の続きを行わせる
前記(1)に記載の受信装置。
(3)前記ヒント情報抽出回路は、前記ヒント情報として前記過去の信号データのバックオフに関する情報を抽出し、前記バックオフに関する情報に応じたタイミングの信号データについて前記受信処理回路に前記所定の受信処理を行わせる
前記(1)に記載の受信装置。
(4)前記ヒント情報抽出回路は、前記ヒント情報として前記過去の信号データの時間方向のずれ量に関する情報を抽出し、前記時間方向のずれ量に関する情報に応じたタイミングの信号データについて前記受信処理回路に前記所定の受信処理を行わせる
前記(1)に記載の受信装置。
(5)前記ヒント情報抽出回路は、前記ヒント情報として前記過去の信号データのシーケンス番号に関する情報を抽出し、前記シーケンス番号に関する情報に応じたタイミングの信号データについて前記受信処理回路に前記所定の受信処理を行わせる
前記(1)に記載の受信装置。
(6)前記ヒント情報抽出回路は、前記ヒント情報として前記過去の信号データを送信した送信装置の移動速度に関する情報を抽出し、前記移動速度に関する情報に応じた前記所定の受信処理を前記受信処理回路に行わせる
前記(1)に記載の受信装置。
(7)前記ヒント情報抽出回路は、前記ヒント情報として前記過去の信号データのペイロードの一部に関する情報を抽出し、前記ペイロードの一部に関する情報を既知データとして前記所定の受信処理を前記受信処理回路に行わせる
前記(1)に記載の受信装置。
(8)前記ヒント情報抽出回路は、前記ヒント情報の有効性を示す情報をさらに抽出し、前記ヒント情報が有効である旨を前記ヒント情報の有効性を示す情報が示している場合に前記ヒント情報を抽出する
前記(1)から(7)のいずれかに記載の受信装置。
(9)送信装置と、
前記送信装置から送信された過去の信号データを保持するメモリと、新たに受信した信号データからヒント情報を抽出するヒント情報抽出回路と、前記ヒント情報に基づいて前記メモリに保持された前記過去の信号データを読み出して所定の受信処理を行う受信処理回路とをそれぞれ備える複数の受信装置と、
前記複数の受信装置の何れかから前記ヒント情報を取得して前記複数の受信装置の他の受信装置に供給するサーバと
を具備する通信システム。
(10)送信装置と、
新たに受信した信号データからヒント情報を抽出するヒント情報抽出回路をそれぞれ備える複数の受信装置と、
前記受信装置によって受信された過去の信号データを保持するメモリと、前記複数の受信装置の何れかから前記ヒント情報を取得して前記ヒント情報に基づいて前記メモリに保持された前記過去の信号データを読み出して所定の受信処理を行う受信処理回路とを備えるサーバと
を具備する通信システム。
20 送信装置
30 ネットワーク
40 クラウドサーバ
100 受信装置
109 アンテナ
110 RF(Radio Frequency)回路
120 ADC(Analog-to-Digital Converter)
130~132 メモリ
140 受信処理回路
141 プリアンブル検出部
142 周波数補正部
143 フィルタ
144 間引き処理部
150 ヒント情報抽出回路
160 制御回路
200 送信装置
209 アンテナ
711 ヒント情報有効フラグ
712 ヒント情報
719 ペイロード
Claims (10)
- 過去の信号データを保持するメモリと、
新たに受信した信号データからヒント情報を抽出するヒント情報抽出回路と、
前記ヒント情報に基づいて前記メモリに保持された前記過去の信号データを読み出して所定の受信処理を行う受信処理回路と
を具備する受信装置。 - 前記受信処理回路は、前記所定の受信処理として誤り訂正処理を行い、
前記メモリは、前記過去の信号データとして前記誤り訂正処理の途中のデータを保持し、
前記ヒント情報抽出回路は、前記ヒント情報として前記過去の信号データのタイミングで送信が行われたか否かの情報を抽出し、前記過去の信号データのタイミングで送信が行われていた場合には前記受信処理回路に前記誤り訂正処理の続きを行わせる
請求項1記載の受信装置。 - 前記ヒント情報抽出回路は、前記ヒント情報として前記過去の信号データのバックオフに関する情報を抽出し、前記バックオフに関する情報に応じたタイミングの信号データについて前記受信処理回路に前記所定の受信処理を行わせる
請求項1記載の受信装置。 - 前記ヒント情報抽出回路は、前記ヒント情報として前記過去の信号データの時間方向のずれ量に関する情報を抽出し、前記時間方向のずれ量に関する情報に応じたタイミングの信号データについて前記受信処理回路に前記所定の受信処理を行わせる
請求項1記載の受信装置。 - 前記ヒント情報抽出回路は、前記ヒント情報として前記過去の信号データのシーケンス番号に関する情報を抽出し、前記シーケンス番号に関する情報に応じたタイミングの信号データについて前記受信処理回路に前記所定の受信処理を行わせる
請求項1記載の受信装置。 - 前記ヒント情報抽出回路は、前記ヒント情報として前記過去の信号データを送信した送信装置の移動速度に関する情報を抽出し、前記移動速度に関する情報に応じた前記所定の受信処理を前記受信処理回路に行わせる
請求項1記載の受信装置。 - 前記ヒント情報抽出回路は、前記ヒント情報として前記過去の信号データのペイロードの一部に関する情報を抽出し、前記ペイロードの一部に関する情報を既知データとして前記所定の受信処理を前記受信処理回路に行わせる
請求項1記載の受信装置。 - 前記ヒント情報抽出回路は、前記ヒント情報の有効性を示す情報をさらに抽出し、前記ヒント情報が有効である旨を前記ヒント情報の有効性を示す情報が示している場合に前記ヒント情報を抽出する
請求項1記載の受信装置。 - 送信装置と、
前記送信装置から送信された過去の信号データを保持するメモリと、新たに受信した信号データからヒント情報を抽出するヒント情報抽出回路と、前記ヒント情報に基づいて前記メモリに保持された前記過去の信号データを読み出して所定の受信処理を行う受信処理回路とをそれぞれ備える複数の受信装置と、
前記複数の受信装置の何れかから前記ヒント情報を取得して前記複数の受信装置の他の受信装置に供給するサーバと
を具備する通信システム。 - 送信装置と、
新たに受信した信号データからヒント情報を抽出するヒント情報抽出回路をそれぞれ備える複数の受信装置と、
前記受信装置によって受信された過去の信号データを保持するメモリと、前記複数の受信装置の何れかから前記ヒント情報を取得して前記ヒント情報に基づいて前記メモリに保持された前記過去の信号データを読み出して所定の受信処理を行う受信処理回路とを備えるサーバと
を具備する通信システム。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2023505133A JPWO2022190588A1 (ja) | 2021-03-08 | 2021-12-28 | |
US18/548,449 US20240187132A1 (en) | 2021-03-08 | 2021-12-28 | Receiving device and communication system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021-035975 | 2021-03-08 | ||
JP2021035975 | 2021-03-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022190588A1 true WO2022190588A1 (ja) | 2022-09-15 |
Family
ID=83227228
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/048926 WO2022190588A1 (ja) | 2021-03-08 | 2021-12-28 | 受信装置および通信システム |
Country Status (3)
Country | Link |
---|---|
US (1) | US20240187132A1 (ja) |
JP (1) | JPWO2022190588A1 (ja) |
WO (1) | WO2022190588A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000224226A (ja) * | 1999-01-27 | 2000-08-11 | Denso Corp | 誤り制御方式及び装置、送信及び受信制御装置 |
WO2009066406A1 (ja) * | 2007-11-22 | 2009-05-28 | Panasonic Corporation | 無線通信装置、無線通信システム及び無線通信方法 |
JP2012507901A (ja) * | 2008-11-04 | 2012-03-29 | テールズ | 厳しい環境で繰り返して伝送されるデータセットの収集を向上させる方法 |
JP2017216552A (ja) * | 2016-05-31 | 2017-12-07 | ソニー株式会社 | 無線装置、通信装置、制御方法および通信制御方法 |
-
2021
- 2021-12-28 JP JP2023505133A patent/JPWO2022190588A1/ja active Pending
- 2021-12-28 US US18/548,449 patent/US20240187132A1/en active Pending
- 2021-12-28 WO PCT/JP2021/048926 patent/WO2022190588A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000224226A (ja) * | 1999-01-27 | 2000-08-11 | Denso Corp | 誤り制御方式及び装置、送信及び受信制御装置 |
WO2009066406A1 (ja) * | 2007-11-22 | 2009-05-28 | Panasonic Corporation | 無線通信装置、無線通信システム及び無線通信方法 |
JP2012507901A (ja) * | 2008-11-04 | 2012-03-29 | テールズ | 厳しい環境で繰り返して伝送されるデータセットの収集を向上させる方法 |
JP2017216552A (ja) * | 2016-05-31 | 2017-12-07 | ソニー株式会社 | 無線装置、通信装置、制御方法および通信制御方法 |
Also Published As
Publication number | Publication date |
---|---|
US20240187132A1 (en) | 2024-06-06 |
JPWO2022190588A1 (ja) | 2022-09-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4259663A (en) | Contention interference detection by comparison of transmitted and received signal information | |
US9172522B2 (en) | Data transmitter and data receiver | |
JP4415047B2 (ja) | 直交復調装置、直交復調方法および直交復調用プログラム | |
US9425830B2 (en) | Error detection device and error detecting method | |
US10873429B1 (en) | Data frame error recovery for multi-node systems | |
US10944539B2 (en) | Method and apparatus for backscatter communication of pattern-based demodulation | |
JP6188867B2 (ja) | パケットを復元するための方法及びシステム | |
US8787471B1 (en) | Alignment of DigRF4 lane | |
CN111052051A (zh) | 信号发射方法、信号接收方法及装置 | |
WO2022190588A1 (ja) | 受信装置および通信システム | |
CN113645013A (zh) | 用于无线重传通信系统的位纠错 | |
WO2015053856A2 (en) | Signal tracking and decoding in gnss | |
JP4272236B2 (ja) | 無線タグ通信装置 | |
US20060062329A1 (en) | Apparatus and method for adaptive digital locking and soft evaluation of data symbols in a wireless digital communication system | |
KR20230012598A (ko) | 블라인드 검출 방법, 장치, 단말 및 저장매체 | |
US9621189B2 (en) | Method and apparatus for identification and compensation for inversion of input bit stream in Ldpc decoding | |
JP2015169949A (ja) | 無線通信装置 | |
JP2019032662A (ja) | 車車間通信装置および走行支援装置 | |
KR101374722B1 (ko) | Pls 복호정보를 이용한 dvb-s2 수신기의 프레임 검출방법 | |
US10218462B2 (en) | Apparatus and method for supporting cooperative transmission | |
US20090106629A1 (en) | Rds compatible receiver and rds data receiving method | |
CN112698366A (zh) | 一种卫星定位接收机帧同步方法 | |
RU2642803C1 (ru) | Способ повышения достоверности передачи цифрового сообщения | |
WO2008001980A1 (en) | Data recovery method and apparatus for radio frequency identification | |
JP2008141668A (ja) | 光受信装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21930432 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2023505133 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18548449 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21930432 Country of ref document: EP Kind code of ref document: A1 |