Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W72/00—Local resource management
  • H04W72/04—Wireless resource allocation
  • H04W72/044—Wireless resource allocation based on the type of the allocated resource
  • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B7/00—Radio transmission systems, i.e. using radiation field
  • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
  • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
  • H04B7/0413—MIMO systems
  • H04B7/0452—Multi-user MIMO systems
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L27/00—Modulated-carrier systems
  • H04L27/26—Systems using multi-frequency codes
  • H04L27/2601—Multicarrier modulation systems
  • H04L27/2602—Signal structure
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L5/00—Arrangements affording multiple use of the transmission path
  • H04L5/003—Arrangements for allocating sub-channels of the transmission path
  • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L5/00—Arrangements affording multiple use of the transmission path
  • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
  • H04L5/0094—Indication of how sub-channels of the path are allocated
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
  • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
  • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
  • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
• • 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
  • H04W72/00—Local resource management
  • H04W72/20—Control channels or signalling for resource management
• • 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 relates to a device for communicating data by wireless communication.
• the EEE E802.11 series standard is known as a WLAN communication standard formulated by Elect r o n i c s En g i n e er s). Note that W L A N is an abbreviation for W i r e I e s s L o c a l A r e a N e t wor k.
• the IEE E802.11 series standards include standards such as IEE E802.11 a/b/g/n/ac/aX standards.
• Patent Document 1 discloses performing wireless communication according to the IEEE 802.1 1a x standard by ⁇ F D MA ( ⁇ r t h o g o n a l f r e q u e n c y — d i v i s i o n m u l t i pI e a c c e s s ).
• I E E E802.11 ax standard high peak throughput is achieved by executing wireless communication using F D M A.
• the IEEE 802.11 ax standard implements multi-user communication in which communication is performed in parallel with multiple partner devices by executing wireless communication using ⁇ F DMA.
• the next-generation WL AN communication standard is the IEEE 802.11 EHT (Extreme Iy High Throughput) standard, which is the successor to the EEE 802.11 a X standard. Being considered.
• the IEEE 802.11 EHT standard considers expanding the bandwidth of radio waves to improve throughput.
• Patent Document 1 Japanese Unexamined Patent Publication No. 2018_50133 Summary of the invention
• EHT MU PPDU Short Raining Field
• EHT — LT F Ext me ly H igh T hroughput— L on after the EH TS TF. g Training Field
• a transmission means for transmitting the EHT MU PPDU including the following.
• a communication device is L_S TF, L-LT F after the L_S TF, L-S s G after the L-LT F, and L-S TF.
• the RHT is an EHT — SIG — B containing a RUAII ⁇ cati ⁇ n subfield with a bit number of NX 8 bits, and an E HT — ST Ft after the E HT — SIG — B.
• NX including 8-bit RU Allocation subfield with 8-bit number, EHT — S G G B, E HT — S G G — B after E HT — ST F, and EHT — EHT-LTF after STF, and generating means for generating an E HT MU PPDU including the: and an antenna used for transmitting the E HT MU PPDU generated by the generating means.
• a communication device capable of communicating using a bandwidth of 32 OMH Z to communicate information regarding the allocation of R U with an appropriate frame configuration.
• FIG. 1 is a diagram showing a configuration of a network in which a communication device 202 participates.
• FIG. 2 is a diagram showing a hardware configuration of the communication device 202.
• FIG. 3 is a diagram showing an example of a configuration of a PHY frame of an EHTMU PPPDU with which the communication device 202 communicates.
• FIG. 5 is a diagram showing an example of a configuration of an EHT-S IG-B field when communication is performed using a bandwidth of 320 MHz.
• FIG. 1 shows a configuration of a network in which the communication device 202 according to the present embodiment participates.
• the communication device 202 is an access point (AP, Ac c es s P o i n t) having a role of constructing the network 201.
• the communication devices 203, 204 and 205 are stations (STAs, Statons) that have a role of participating in the network 201, respectively.
• Each communication device supports the EE E802.11 EHT standard, and can perform wireless communication compliant with the IEE 802.11 EHT standard via the network 201.
• I E E E is an abbreviation for I n st i t u t e o f E l e c t r i c a l a n d E l e c t r o n i c s En g i n e e r s.
• E HT is an abbreviation for E x t r e me l y H i g h T h r o u g h p u t.
• E HT may be interpreted as an abbreviation for Ext r e me H i g h T h r u u g h p u t.
• Each communication device can communicate in the frequency bands of 2.4 GHz band, 5 GHz band, and 6 GHz band. Also, each communication device can communicate using bandwidths of 20 MHz, 40 MHz, 80 MHz, 1 60 MHz, and 32 OMHs.
• the communication devices 202 to 205 perform ⁇ F DMA communication conforming to the IEEE 802.11 EHT standard to multiplex signals of multiple users.
• User (MU, Mu ti ti ser) communication can be realized.
• ⁇ FDMA communication is an abbreviation for Orthogonal Frequency Division Multiple Access (Orthogonal Frequency Division Multiple Access).
• OF D MA communication part of the divided frequency band (RU, Resource Unit) is allocated so that it does not overlap with each STA, and the carriers of each STA are orthogonal. Therefore, AP can communicate with multiple STAs in parallel.
• the communication devices 202 to 205 are MU M I M O (Mu l i U s er r
• the communication device 202 has a plurality of antennas, and by assigning one or more antennas to each of the communication devices 203 to 205, simultaneous communication with a plurality of STAs can be realized.
• the communication device 202 can transmit radio waves to a plurality of STAs at the same time by adjusting so that the radio waves transmitted to the communication devices 203 to 205 do not interfere with each other.
• the communication device 202 may implement MU communication by combining ⁇ F DMA communication and MU MIM communication. That is, A P may perform MU M ⁇ M0 communication at R U above a certain threshold when performing MU communication with multiple ST A. For example, when assigning RUs to multiple STAs, RUs with subcarriers smaller than 106 communicate with one STA, and RUs with subcarriers of 106 or more cause MU M ⁇ M0 by multiple STAs. Communication may be performed.
• the communication device 202 notifies the communication devices 203 to 205 of the allocation of the RU used in the data communication to each S TA by using the P HY frame.
• the communication devices 202 to 205 are said to support the IEEE 802.1 1 EHT standard. It may correspond to at least one of the legacy standards that are standards.
• the legacy standard is the IEEE 802.1 1 a/b/g/n/ac/a X standard.
• other communication standards such as Bluetooth (registered trademark), NFC, UWB, ZigBee, and MBA may be supported.
• UWB is an abbreviation for UI tra Wide B and MB ⁇ A is an abbreviation for Multi B and OF DM AII iance.
• ⁇ F DM is the abbreviation for ⁇ rthogonal Frequency Division Division
• NFC is an abbreviation for Near Field Communication.
• UWB includes Wireless US B, Wireless 1 394, Wi N ET and more. It may also support a communication standard for wired communication such as wired LAN.
• Specific examples of the communication device 202 include, but are not limited to, a wireless LAN router and a PC.
• the communication device 202 may be any communication device capable of executing MU communication with another communication device.
• the communication device 202 may be an information processing device such as a wireless chip capable of executing wireless communication conforming to the IEEE 802.11 EHT standard.
• Specific examples of the communication devices 203 to 205 include, but are not limited to, cameras, tablets, smart phones, PCs, mobile phones, and video cameras.
• the communication devices 203 to 205 may be any communication device that can execute MU communication with other communication devices.
• the communication devices 203 to 205 may be information processing devices such as wireless chips capable of executing wireless communication conforming to the EE E802.11 E HT standard.
• the network in Figure 1 is a network consisting of one AP and three STAs, but the number of APs and STAs is not limited to this.
• An information processing device such as a wireless chip has an antenna for transmitting the generated signal.
• FIG. 2 shows the hardware configuration of the communication device 202 in this embodiment.
• the communication device 202 includes a storage unit 301, a control unit 302, a function unit 303, an input unit 3 04, an output unit 305, a communication unit 306, and an antenna 307 are provided.
• control unit 302 may include a plurality of processors such as multi-core, and the plurality of processors may control the entire communication device 202.
• control unit 302 controls the functional unit 303 to execute a predetermined process such as wireless communication, image pickup, printing, projection and the like.
• the functional unit 303 is hardware for the communication device 202 to execute a predetermined process.
• the input unit 304 receives various operations from a user.
• the output unit 305 performs various outputs to the user via the monitor screen and the speaker.
• the output by the output unit 305 may be a display on a monitor screen, a voice output from a speaker, a vibration output, or the like.
• the touch panel Both the force section 304 and the output section 305 may be realized by one module.
• the input unit 304 and the output unit 305 may be integrated with the communication device 202 or may be separate members.
• the communication unit 306 controls wireless communication conforming to the IEE E802.11EHT standard. In addition to the EEE 802.1 1 EHT standard, the communication unit 306 controls wireless communication based on other EEE 802.11 series standards and wired communication such as wired LAN. Good. The communication unit 306 controls the antenna 307 to send and receive the signal generated by the control unit 302 for wireless communication.
• the communication device 202 supports the NFC standard, BI uet ⁇ ⁇ th standard, etc. in addition to the IEEE 802.11 EHT standard, wireless communication control conforming to these communication standards is performed. May be.
• the communication unit 306 and the antenna 307 corresponding to the respective communication standards may be individually provided.
• the communication device 202 communicates data such as image data, document data, and video data with the communication devices 203 to 205 via the communication unit 306.
• the antenna 307 may be configured separately from the communication unit 306, or may be configured as one module together with the communication unit 306.
• FIG. 3 shows an E HT MU with which the communication device 202 communicates in the present embodiment.
• P P DU is an abbreviation for P h y s i c a l L a y e r (P HY) P r o t o c o l D a t a U n i t.
• the communication device may generate and then transmit the entire E HT MU PPDU, or may generate and transmit in parallel in order from the LS TF 401.
• the communication device is L-
• the L-LT F402 may be generated in parallel with the transmission of the field after the ST F401 is generated.
• L-ST F401, L-LT F402, and LSI G4 03 are legacy fields that can be decoded by communication devices that support the IEEE 802.1 1 series standard before IEEE 802.11 ax. is there.
• the L-ST F401 is used for detection of a wireless packet signal, automatic gain control (AGC, Aut om a t ic G ain Co n t r o l), timing detection, and the like.
• the L-LT F402 is used for high-accuracy frequency/time synchronization and acquisition of propagation channel information (CS I, Cha n n n e l S t a t e In f o r m a t i o n ).
• the L-S I G403 is used to transmit control information including information on the data transmission rate and packet length. Note that R L-S I G 404 may be omitted.
• Mitsu! ⁇ 1 Chome 3 1 ⁇ -8 405, Mitsu ! ⁇ 1 Chome 3 1 ⁇ -Mami 406, Mitsu 1 ⁇ 1 Chome 3 Chome 407 and EHT-LTF 408 are fields that can be decoded by a communication device compatible with the IEEE 802.11 EHT standard.
• L-ST F401, L-LT F402, LS I G403, R L- SI G404, EH TS ⁇ G-A405, EHT-S ⁇ G-B 406, E HT-ST F407 and E HT- LT F408 is collectively referred to as P HY preamble.
• the common field consists of the subfields shown in Table 1 below.
• the correspondence with OMH z) is as shown in Table 1.
• the case of 80 + 80 MHz is the case of using two bandwidths of 8 OMH z.
• the case of 1 60+ 16 OMHz is the case of using two bandwidths of 1 60 MHz.
• Figure 4 shows RU allocation patterns and RUs for a bandwidth of 2 OMHz.
• bit string of RUAII ⁇ cati ⁇ n is 00000001
• the bandwidth of 20 MHz is divided into 7 RUs, which is 26 subcarriers per RU, and 1 RU, which is 52 subcarriers per RU. Indicates to be assigned.
• RUs with subcarriers of 106 or more support MU MIM communication. Therefore, for allocations that include RUs with subcarriers of 106 or more, the number of ST A multiplexed with RUs with subcarriers of 106 or more is determined by the bit string of RU AI ⁇ cati ⁇ n. Show. For example, if there is a description of y 2 y 1 y 0, y 0, y 1, y 2 are 0 or 1 respectively, and 2 2 X y 2 + 2 1 X y 1 + y ⁇ + 1 STA indicates that subcarriers are multiplexed in RUs with 106 or more.
• the communication devices 203 to 205 have the EH TS I G-B406 included in the EHT MU PPDU received from the communication device 202. Reissue the common field.
• the RU AI ⁇ cati ⁇ n subfield in the common field consists of 8 bits.
• Communication devices 203-205 are connected to communication device 202 according to the RU assignment indicated by the RU AI location subfield. connect.
• Fig. 5 shows an example of the configuration of the EHT_S G-B field when communication is performed using a bandwidth of 32 OMHz.
• the RU a I o c a t i o n subfield indicates the R U allocation with 242 subcarriers per 8-bit.
• the 20 MHz subband corresponds to RU with 242 subcarriers.
• the RU Al l o c a t i o n subfield indicates the allocation of RU in 2 OMH z subbands of 8 bits.
• communication device 202 assigns the RUs of the first, third, fifth, seventh, ninth, 1st, 1st, 3rd, and 1st 5th 2 OMH z subbands every 8 bits.
• the EHT-S ⁇ G-B field is to be communicated. Also, apart from the EH TS I GB field indicating the RU allocation of the odd-numbered 2 OMH z subband, the EHT-S ⁇ G-B field indicating the RU allocation of the even-numbered 2 OMH z subband is communicated. .. in this case,
• the communication device 202 when communicating using a bandwidth of 32 OMH z, receives an EHT-SIG-B field containing a 32-bit RU a II ⁇ cati ⁇ n subfield, and a communication device 203. ⁇ Communicate with 205.
• odd subbands Generates and transmits an EHT-S ⁇ G-B field having information on the RU allocation of the EHT-S ⁇ G-B field having information on the RU allocation of the even-numbered subband.
• the communication device 202 notifies the communication devices 203 to 205 of the information about the RU allocation by generating and transmitting the EHT MU PP DU including the RU AI ⁇ cati ⁇ n subfield. be able to.
• the communication devices 203 to 205 can acquire the information on the RU allocation by receiving the E HT MU P P D U including the RU a l o c a t io n subfield.
• the method of allocating the RU indicated by the bit sequence of the RUA, ⁇ ⁇ c at i ⁇ n subfield shown in the present embodiment is only an example.
• the method of allocating R U indicated by the bit sequence of the RU A I I ⁇ c at i ⁇ n subfield may be different from that of the present embodiment.
• the communication device 202 is the AP in the network in the present embodiment, it may be a device that operates as the STA. Further, although the communication device 202 is described as a device that transmits the E HT MU PPDU, it may be a device that receives the E HT MU PPDU. In this case, the communication device 202 receives the received EHT M ⁇ 02020/175297 14 ⁇ (: 17 2020/006655
• the name of each field, the position of the bit, and the number of bits used in the present embodiment are not limited to those described in the present embodiment, and the same information can be used for different field names, different positions and bits. It may be stored in 1 ⁇ 1 frame.
• the present invention can be embodied as, for example, a system, an apparatus, a method, a program, or a recording medium (storage medium).
• a plurality of devices eg, host computer, interface device, imaging device, It may be applied to a system composed of a single application, etc.) or to a device composed of one device.
• the present invention provides a program that implements one or more functions of the above-described embodiments to a system or device via a network or a storage medium, and one or more processors in a computer of the system or device. Reads the program ⁇ 2020/175 297 15 ⁇ (: 171-1? 2020/006655

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• Engineering & Computer Science (AREA)
• Signal Processing (AREA)
• Computer Networks & Wireless Communication (AREA)
• Computer Security & Cryptography (AREA)
• Mobile Radio Communication Systems (AREA)
• Communication Control (AREA)
• Radio Transmission System (AREA)

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