WO2020209070A1 - 通信装置、通信方法、及び、プログラム - Google Patents

通信装置、通信方法、及び、プログラム Download PDF

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Publication number
WO2020209070A1
WO2020209070A1 PCT/JP2020/013388 JP2020013388W WO2020209070A1 WO 2020209070 A1 WO2020209070 A1 WO 2020209070A1 JP 2020013388 W JP2020013388 W JP 2020013388W WO 2020209070 A1 WO2020209070 A1 WO 2020209070A1
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WO
WIPO (PCT)
Prior art keywords
frame
harq
communication
communication device
wireless
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Ceased
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PCT/JP2020/013388
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English (en)
French (fr)
Japanese (ja)
Inventor
裕彦 猪膝
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Canon Inc
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Canon Inc
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Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to EP20786960.3A priority Critical patent/EP3955611A4/en
Priority to CN202080026255.9A priority patent/CN113678485B/zh
Publication of WO2020209070A1 publication Critical patent/WO2020209070A1/ja
Priority to US17/496,638 priority patent/US11923986B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • 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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • 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
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1816—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of the same, encoded, message
    • 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
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0215—Traffic management, e.g. flow control or congestion control based on user or device properties, e.g. MTC-capable devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data
    • 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
    • H04L1/1835—Buffer management
    • H04L1/1845—Combining techniques, e.g. code combining
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present invention generally relates to communication devices, communication methods, and programs, and specifically to communication control technology in wireless LAN.
  • the IEEE 802.11 standard is known as a communication standard for wireless LAN (Wireless Local Area Network).
  • the IEEE802.11ax standard which is the latest standard in the IEEE802.11 standard series, uses OFDMA (Orthogonal Frequency Division Multiple Access) to achieve high peak throughput and improved communication speed under congestion (congestion conditions). See Patent Document 1).
  • IEEE802.11EHT Extremely High Throughput
  • HARQ Hybrid Automatic Repeat
  • ARQ Automatic Repeat Request
  • the communication device may be useful for the communication device that received the wireless frame to quickly confirm whether or not HARQ is used in the data transmission by the wireless frame.
  • HARQ is not used in the conventional standard. Therefore, the communication device does not have a mechanism for recognizing whether the other device can execute the communication using HARQ. Similarly, the other device does not have a mechanism for recognizing whether the communication device can use HARQ.
  • the present invention provides a technique that enables a communication device and a partner device to mutually recognize the capabilities of the other HARQ.
  • the communication device has a communication means for transmitting or receiving a radio frame conforming to the IEEE802.11 standard series to or from the other party device of communication, and the device having transmitted the radio frame has.
  • the capability of HARQ is shown in the MAC (medium access control) frame of the radio frame.
  • the communication device and the other device can mutually recognize the capabilities of the other HARQ.
  • FIG. 1 is a diagram showing a configuration example of a wireless communication network.
  • FIG. 2 is a diagram showing a hardware configuration example of a communication device.
  • FIG. 3 is a diagram showing a functional configuration example of the communication device.
  • FIG. 4 is a diagram showing an example of a processing flow executed by the communication device.
  • FIG. 5 is a diagram showing an example of a processing flow related to communication in a wireless communication network.
  • FIG. 6 is a diagram showing a configuration example of HARQ Element.
  • FIG. 7 is a diagram showing an example of information indicating HARQ type.
  • FIG. 1 shows a configuration example of the wireless communication network of the present embodiment.
  • the wireless communication network includes one access point (AP) and three stations (STA).
  • AP102 and STA103 to STA105 are compliant with IEEE802.11EHT (Extremely High Throughput), and are configured to be capable of executing wireless communication conforming to a standard established before the IEEE802.11EHT standard.
  • IEEE802.11EHT is provided for convenience, and may be another name in the state where the standard is finalized. However, the scope of claims in this specification and the attachment is all that can support the processing described later. We plan to cover the standard.
  • the access point when a specific device is not pointed to, the access point may be referred to as "AP” and the station (terminal) may be referred to as "STA" without a reference number.
  • FIG. 1 shows a wireless communication network including one AP and three STAs as an example, but the number of these communication devices may be larger or smaller than shown.
  • the AP when communication between STAs is performed, the AP does not have to exist.
  • the communicable range of the network formed by the AP 102 is indicated by the circle 101.
  • the communicable range may cover a wider range or only a narrower range.
  • EHT may be understood as an acronym for Extreme High Throughput.
  • FIG. 2 shows a hardware configuration example of a communication device (AP and STA).
  • the communication device includes a storage unit 201, a control unit 202, a function unit 203, an input unit 204, an output unit 205, a communication unit 206, and an antenna 207 as an example of its hardware configuration.
  • the storage unit 201 is composed of ROM, RAM, or one of them, and stores various information such as a program for performing various operations described later and communication parameters for wireless communication.
  • storage unit 201 in addition to memories such as ROM and RAM, storage media such as flexible disks, hard disks, optical disks, magneto-optical disks, CD-ROMs, CD-Rs, magnetic tapes, non-volatile memory cards, and DVDs. May be used.
  • the control unit 202 is composed of, for example, one or more processors such as a CPU and MPU, an ASIC (application specific integrated circuit), a DSP (digital signal processor), an FPGA (field programmable gate array), and the like.
  • CPU is an acronym for Central Processing Unit
  • MPU is an acronym for Micro Processing Unit.
  • the control unit 202 controls the entire device by executing the program stored in the storage unit 201.
  • the control unit 202 may control the entire device in cooperation with the program stored in the storage unit 201 and the OS (Operating System). Further, the control unit 202 may have a circuit for generating and decoding an error correction code in relation to HARQ (Hybrid Automatic Repeat request) in communication via the communication unit 206.
  • HARQ Hybrid Automatic Repeat request
  • control unit 202 controls the function unit 203 to execute predetermined processing such as imaging, printing, and projection.
  • the functional unit 203 is hardware for the device to execute a predetermined process.
  • the functional unit 203 is an imaging unit and performs imaging processing.
  • the functional unit 203 is a printing unit and performs printing processing.
  • the functional unit 203 is a projection unit and performs projection processing.
  • the data processed by the functional unit 203 may be data stored in the storage unit 201, or may be data communicated with another AP or STA via the communication unit 206 described later.
  • Input unit 204 accepts various operations from the user.
  • the output unit 205 outputs various outputs to the user.
  • the output by the output unit 205 includes at least one such as a display on a screen, an audio output by a speaker, and a vibration output.
  • both the input unit 204 and the output unit 205 may be realized by one module like a touch panel.
  • the communication unit 206 controls wireless communication and IP communication in accordance with the IEEE802.11 standard series.
  • the communication unit 206 is a so-called wireless chip, and may itself include one or more processors and memories. In the present embodiment, the communication unit 206 can execute processing conforming to at least the IEEE802.11EHT standard.
  • the communication unit 206 controls the antenna 207 to transmit and receive wireless signals for wireless communication.
  • the device communicates content such as image data, document data, and video data with another communication device via the communication unit 206.
  • the antenna 207 is, for example, an antenna capable of transmitting and receiving at least one of a sub GHz band, a 2.4 GHz band, a 5 GHz band, and a 6 GHz band.
  • the frequency band (and combinations thereof) that can be supported by the antenna 207 is not particularly limited.
  • the antenna 207 may be one antenna, or may be a set of two or more antennas for performing MIMO (Multi-Input and Multi-Auto) transmission / reception. Further, although one antenna 207 is shown in FIG. 2, for example, two or more antennas (two sets or more) that can correspond to different frequency bands may be included.
  • FIG. 3 shows an example of functional configurations of communication devices (AP and STA).
  • the communication device includes a HARQ capability information generation unit 301, a MAC frame generation unit 302, a scan processing unit 303, a connection processing unit 304, a HARQ type determination unit 305, and a data transmission / reception unit 306.
  • the HARQ capability information generation unit 301 generates information indicating whether or not the communication device can use HARQ, and if HARQ can be used, information indicating a supported HARQ type.
  • the MAC frame generation unit 302 generates a MAC (medium access control) frame of a wireless frame transmitted by a communication device.
  • the MAC frame generation unit 302 generates a MAC frame in which the HARQ capability information generated by the HARQ capability information generation unit 301 is stored, if necessary.
  • the radio frame transmitted including the MAC frame may be any of a Beacon frame, a Probe Request frame, and a Probe Response frame.
  • the wireless frame may be either an Association Request frame or an Assistation Response frame.
  • the wireless frame may be either a Response Request frame or a Response Response frame.
  • the scan processing unit 303 executes a process for the STA to acquire the AP network information. For example, when the communication device is STA, the scan processing unit 303 receives a Beacon frame from a surrounding AP, transmits a Beacon Request frame, and executes a process of receiving a Beacon Response frame from the AP. Further, when the communication device is an AP, the scan processing unit 303 transmits a Beacon frame, and also executes a process of transmitting a Beacon Response frame when receiving a Beacon Request frame from the STA. The connection processing unit 304 performs processing for the STA to connect to the network managed by the AP.
  • the connection processing unit 304 transmits an Association Request frame to the AP, and receives the Response Response frame from the AP. Further, when the communication device is an AP, when the connection processing unit 304 receives an Association Request frame from the STA, the connection processing unit 304 transmits an Association Response frame to the STA as a response to the frame. In the scan process by the scan processing unit 303 and the connection process by the connection processing unit 304, the capability information of HARQ is exchanged between the AP and the STA.
  • the HARQ type determination unit 305 determines the type of HARQ to be used when it is determined that data transmission / reception is performed using HARQ based on the capability information of HARQ exchanged with the communication partner device.
  • the data transmission / reception unit 306 transmits / receives a data frame based on the HARQ type determined by the HARQ type determination unit 305. If it is determined that the data transmission / reception unit 306 does not perform data transmission / reception by HARQ, the data transmission / reception unit 306 may perform data transmission / reception by ARQ (automatic repeat request) supported by a conventional standard such as IEEE802.11ax.
  • the communication device executes a scan process (S401).
  • the communication device can receive the Beacon frame transmitted by the AP, thereby acquiring the network information of the AP. Further, in this case, the communication device may acquire the network information of the AP by actively transmitting the Probe Request frame and receiving the Probe Response frame from the AP.
  • the Beacon frame and the Probe Response frame transmitted by the AP conforming to IEEE802.11EHT may include the HARQ capability information of the AP.
  • the Probe Request transmitted by an IEEE 802.11EHT-compliant STA may include the HARQ capability information of that STA.
  • the communication device executes a connection process with the other device (S402).
  • the communication device transmits an Association Request frame to the AP, and receives an Association Response frame as a response including the connection result from the AP.
  • the communication device transmits an Association Response frame to the STA as a response including the connection result in response to receiving the Association Request frame from the STA.
  • the Response Request frame and the Response Response frame can also include the HARQ capability information of the sender.
  • the STA can determine the HARQ capability information to be included in the Association Request frame based on the HARQ capability information of the AP acquired in the scanning process.
  • the STA indicates in the ability information of HARQ in the Association Request frame that the own device cannot use HARQ. It may be.
  • the STA may also determine its own HARQ type, for example, according to the type of HARQ available to the AP.
  • the AP may determine the ability information of the HARQ of its own device to be included in the Association Response frame based on the ability information of the HARQ of the STA included in the Association Request frame.
  • the communication device determines whether or not HARQ can be used in communication with the other device based on the capability information of HARQ exchanged in the connection process (S403).
  • the communication device determines the type of HARQ used for transmitting and receiving data frames (S404).
  • the determination of the type of HARQ can be made by selecting one type from a plurality of types of HARQ. It should be noted that the determination of the HARQ type does not necessarily have to be performed, and even if a specific pre-designated HARQ type is always used (unless otherwise specified by the user, the other device, etc.). Good.
  • the communication device transmits / receives a data frame to / from the other device based on the type of HARQ determined in S404 (S405). If the communication device determines that HARQ cannot be used (NO in S403), the communication device does not determine the type of HARQ and does not use HARQ, and the data frame is sent to and from the other device. Is transmitted / received (S405).
  • AP and STA execute the scanning process, for example, S501 to S503. That is, the AP can transmit a Beacon frame including the capability information of HARQ of its own device (S501). Beacon frames are transmitted at a predetermined cycle, for example, 100 milliseconds.
  • the STA can transmit a Probe Request frame containing the HARQ capability information of its own device (S502). In this case, the AP transmits a Probe Response frame including the HARQ capability information of its own device in response to receiving the Probe Request frame (S503). Then, the STA receives this Probe Response frame.
  • AP and STA can acquire the ability information of HARQ of the partner device.
  • AP and STA execute the connection process, for example, S504 to S505. That is, the STA transmits an Association Request frame containing the HARQ capability information of its own device to the AP (S504). Then, when the AP receives this Association Request frame, it returns a response including the connection result to the STA in the Association Response frame including the HARQ capability information of its own device (S505).
  • a Response Request frame is used instead of the Association Request frame. Further, in this case, the Response Response frame is used instead of the Association Response frame. That is, in this case, the Response Request frame is transmitted in S504, and the Response Response frame is transmitted in S505.
  • the AP and STA determine whether or not to use HARQ for transmitting and receiving data frames based on the capability information of HARQ exchanged by the connection processing of S504 and S505.
  • the AP and STA also determine the type of HARQ if they decide to use HARQ. Then, the AP and the STA transmit and receive a data frame based on the decision (S506).
  • FIG. 6 shows an example of HARQ ability information (HARQ element).
  • HARQ element is information that can be added to a MAC frame in a wireless frame.
  • the wireless frame may be a Beacon frame, a Probe Request / Response frame, an Association Request / Response frame, or a Response Request / Response frame.
  • the HARQ element includes an Element ID field 601 that identifies an information element and a Length field 602 that indicates the data length of the information element, like other Information Elements defined by the 802.11 standard. Further, the HARQ element includes the HARQ support field 603 and the HARQ type field 604 as information unique to the element.
  • the HARQ support field 603 stores information indicating whether or not HARQ can be used. For example, a value "0" indicates that HARQ cannot be used, and a value "1" indicates that HARQ can be used. It should be noted that the availability of HARQ may be indicated by the presence or absence of the HARQ element itself in the MAC frame without using the HARQ support field 603. That is, it can be shown that HARQ cannot be used because the HARQ element is not included in the MAC frame, and that HARQ can be used by including the HARQ element in the MAC frame.
  • the HARQ type field 604 is information indicating the type of HARQ to be used when HARQ is available.
  • HARQ mainly Chase Combining and Incremental Redundancy. Further, as derivatives of these, for example, there are Partial Case Combining, Partial Incremental Redundancy, and the like. Since these methods are conventional techniques, description thereof will be omitted here.
  • FIG. 7 shows an example of information stored in the HARQ type field 604 when the above four types are used.
  • four types are used, so numbers 0 to 3 are assigned to different types. That is, the value "0" indicates Chase Combining, and the value "1" indicates the type of HARQ in which Incremental Redundancy is used. Also, a value of "2" indicates Partial Case Combining, and a value of "3" indicates Partial Incremental Redundancy as the type of HARQ used.
  • the type of HARQ is not limited to these, and other types of HARQ may be used. In this case, the value stored in the HARQ type field 604 may take five or more values. That is, in the example of FIG.
  • the HARQ type field 604 can be configured as 2-bit information, but may be configured as 3-bit or more information. Further, the HARQ type field 604 may indicate two HARQ types by 1-bit information.
  • the above-mentioned field names and bit positions / sizes are not limited to this example, and similar information may be stored in fields with different field names, and the order and size of information storage may be described above. It may be different from the one.
  • the communication device when the communication device receives the wireless frame, it can quickly recognize the information regarding the HARQ capability of the other device. In addition, the communication device can notify the other device of information regarding the HARQ capability of its own device. As a result, communication using HARQ can be appropriately executed between the communication device and the other device. For example, the communication device can activate a communication function in HARQ of a type determined based on the HARQ ability of the other device and the own device. Further, the communication device may have, for example, a HARQ processing circuit for each type that can be used, and in this case, a HARQ processing circuit of an unused type may be turned off.
  • the communication device may have, for example, a plurality of processing units for processing data in parallel, and a series of data transmitted using the first type of HARQ may be sent to the first communication processing unit. Can be sorted. Then, the communication device can distribute a series of data transmitted by using the second type of HARQ to the second communication processing unit. Further, the communication device can distribute a series of data transmitted without using HARQ to the third communication processing unit. As a result, a group of data having a certain relationship with each other can be easily processed in a batch, and communication with a plurality of remote devices can be efficiently executed.
  • the present invention supplies a program that realizes one or more functions of the above-described embodiment to a system or device via a network or storage medium, and one or more processors in the computer of the system or device reads and executes the program. It can also be realized by the processing to be performed. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.
  • a circuit for example, ASIC

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
PCT/JP2020/013388 2019-04-11 2020-03-25 通信装置、通信方法、及び、プログラム Ceased WO2020209070A1 (ja)

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EP20786960.3A EP3955611A4 (en) 2019-04-11 2020-03-25 COMMUNICATION DEVICE, COMMUNICATION METHOD AND PROGRAM
CN202080026255.9A CN113678485B (zh) 2019-04-11 2020-03-25 通信设备、通信方法和计算机可读存储介质
US17/496,638 US11923986B2 (en) 2019-04-11 2021-10-07 Communication device, communication method, and computer-readable storage medium

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