WO2022050246A1 - 無線通信装置および無線通信システム - Google Patents
無線通信装置および無線通信システム Download PDFInfo
- Publication number
- WO2022050246A1 WO2022050246A1 PCT/JP2021/031829 JP2021031829W WO2022050246A1 WO 2022050246 A1 WO2022050246 A1 WO 2022050246A1 JP 2021031829 W JP2021031829 W JP 2021031829W WO 2022050246 A1 WO2022050246 A1 WO 2022050246A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wireless communication
- communication system
- access point
- frame
- sub
- Prior art date
Links
- 238000004891 communication Methods 0.000 title claims abstract description 443
- 230000005540 biological transmission Effects 0.000 description 113
- 238000000034 method Methods 0.000 description 30
- 230000004044 response Effects 0.000 description 25
- 238000010586 diagram Methods 0.000 description 19
- 238000013468 resource allocation Methods 0.000 description 13
- 238000012545 processing Methods 0.000 description 12
- 238000012937 correction Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 8
- 239000000523 sample Substances 0.000 description 7
- 238000007726 management method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000012549 training Methods 0.000 description 4
- 108700026140 MAC combination Proteins 0.000 description 2
- 101100172132 Mus musculus Eif3a gene Proteins 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000013256 coordination polymer Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 101000829958 Homo sapiens N-acetyllactosaminide beta-1,6-N-acetylglucosaminyl-transferase Proteins 0.000 description 1
- 102100023315 N-acetyllactosaminide beta-1,6-N-acetylglucosaminyl-transferase Human genes 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000036963 noncompetitive effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- 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]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
-
- 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
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
Definitions
- the present invention relates to a wireless communication device and a wireless communication system.
- the present application claims priority with respect to Japanese Patent Application No. 2020-147206 filed in Japan on September 2, 2020, the contents of which are incorporated herein by reference.
- IEEE802.11ax which realizes even higher speed of IEEE802.11, which is a wireless LAN (Local Area Network) standard, is being standardized by IEEE (The Institute of Electrical and Electronics Engineers Inc.) and conforms to the specification draft. Wireless LAN devices have appeared on the market. Currently, standardization activities for IEEE802.11be have been started as a successor standard to IEEE802.11ax. With the rapid spread of wireless LAN devices, in the standardization of IEEE802.11be, further improvement of throughput per user is being studied in an overcrowded environment of wireless LAN devices.
- wireless LAN frame transmission can be performed using an unlicensed band that can carry out wireless communication without the need for permission (license) from the country / region.
- WAN Wide Area Network
- the wireless LAN access point function in the line termination device for connecting to the WAN (Wide Area Network) line to the Internet, or connect the wireless LAN access point device to the line termination device.
- Internet access from within the residence has become wireless. That is, a wireless LAN station device such as a smartphone or a PC (Personal Computer) can connect to the wireless LAN access point device and access the Internet.
- the number of wireless LAN access point devices in the house was often only one, but nowadays, multiple wireless LAN access point devices are introduced in the house.
- the coverage of the area where the wireless LAN is used is expanded.
- a wireless LAN mesh network that wirelessly communicates between wireless LAN access point devices (backhaul, Backhaul) is preferred in order to simplify network construction.
- wireless LAN access point devices are connected by wire such as Ethernet (registered trademark).
- Ethernet registered trademark
- Multi-AP MultiAccessPoint
- a plurality of wireless LAN access point devices cooperate to transmit and receive frames to one wireless LAN station device (non-). See Patent Document 1).
- the wireless LAN access point device transmits a frame in consideration of only the wireless LAN station device connected to the own device.
- the wireless LAN access point device in the Multi-AP wireless communication system cooperates with other wireless LAN access point devices, and the wireless LAN station device connected to the other wireless LAN access point device is also taken into consideration. You will be able to send frames.
- Coordinated OFDMA which is an example of cooperative operation
- frequency channels that can be used by the Multi-AP wireless communication system are distributed and assigned to each wireless LAN access point device so as to be orthogonal in the frequency axis direction.
- the resources allocated to each wireless LAN access point device are independent of other wireless LAN access point devices and are independent of the downlink (wireless LAN access point) to the station device connected to the own wireless LAN access point device. It can be used for (direction from the device to the wireless LAN station device) communication and uplink (direction from the wireless LAN station device to the wireless LAN access point device) communication.
- the size of the frequency channel and frequency resource assigned to each wireless LAN communication system in Coordinated OFDMA is basically the same for downlink communication and uplink communication. For example, when a frequency band of 40 MHz is allocated for downlink communication of a certain wireless LAN communication system, a frequency bandwidth of 40 MHz is also allocated for uplink communication. This is when a wireless LAN communication system requires a wide frequency bandwidth due to a large amount of downlink communication data, but a large amount of uplink communication data does not require a wide frequency bandwidth. The problem was that frequency resources were unnecessarily consumed during the uplink communication period.
- the communication device and communication method according to one aspect of the present invention for solving the above-mentioned problems are as follows.
- the terminal device includes a first sub-wireless communication system that manages a first radio resource and a second sub-wireless communication system that manages a second radio resource.
- the terminal device connected to the first sub-wireless communication system can communicate with a second wireless resource in addition to the first wireless resource.
- the terminal device is described in the above (1), and the second radio resource used for the communication is the terminal device in the first sub-wireless communication system. It is associated with the identifier and notified by the control information of the first sub-wireless communication system.
- the terminal device is described in the above (1), and the second radio resource used for the communication is associated with the identifier of the terminal device in the wireless communication system. And be notified by the control information of the second sub-wireless communication system.
- the terminal device is a wireless communication system composed of a first sub-wireless communication system and a second sub-wireless communication system, and is a terminal connected to the first sub-wireless communication system.
- downlink communication is performed by the first radio resource managed by the first sub wireless communication system
- uplink communication is performed by the second sub in addition to the first radio resource. It can be carried out with a second radio resource managed by the radio communication system.
- the terminal device is described in the above (4), and the second radio resource used for the uplink communication is the terminal in the first sub-wireless communication system. It is associated with the identifier of the device and is notified by the control information of the first sub-wireless communication system.
- the terminal device is described in the above (4), and the second radio resource used for the uplink communication is the identifier of the terminal device in the radio communication system. It is associated and notified by the control information of the second sub-wireless communication system.
- the terminal device is a wireless communication system composed of a first sub-wireless communication system and a second sub-wireless communication system, and is a terminal connected to the first sub-wireless communication system.
- the uplink communication is carried out by the first radio resource managed by the first sub radio communication system
- the downlink communication is carried out by the second sub in addition to the first radio resource. It can be carried out with a second radio resource managed by the radio communication system.
- the terminal device is described in the above (7), and the second radio resource used for the downlink communication is the terminal in the first sub-wireless communication system. It is associated with the identifier of the device and is notified by the control information of the first sub-wireless communication system.
- the terminal device is described in the above (7), and the second radio resource used for the downlink communication is the identifier of the terminal device in the wireless communication system. It is associated and notified by the control information of the second sub-wireless communication system.
- the wireless communication system is a wireless communication system composed of a first sub-wireless communication system and a second sub-wireless communication system, and is the first sub-wireless communication system. Communication of the terminal device to be connected can be carried out not only by the first radio resource managed by the first sub-wireless communication system but also by the second radio resource managed by the second sub-wireless communication system. ..
- the wireless communication system according to one aspect of the present invention is described in the above (10), and the second wireless resource used for communication of the terminal device is the first sub-wireless communication system. It is associated with the identifier of the terminal device and is notified by the control information of the first sub-wireless communication system.
- the wireless communication system according to one aspect of the present invention is described in (10) above, and the second wireless resource used for communication of the terminal device is the terminal device in the wireless communication system. It is associated with the identifier and notified by the control information of the second sub-wireless communication system.
- the wireless communication system according to one aspect of the present invention is described in the above (10), and the second wireless resource used for communication of the terminal device can be used on a contention basis. ..
- the radio resources managed by the access point device constituting one sub radio communication system are transferred to another sub radio communication system.
- the radio resources managed by the access point device constituting one sub radio communication system are transferred to another sub radio communication system.
- the communication system in the present embodiment includes a wireless transmission device (access point device, base station device: Accesspoint, base station device), and a plurality of wireless reception devices (station device, terminal device: station, terminal device). Further, a network composed of a base station device and a terminal device is called a basic service set (BSS: Basic service set, management range). Further, the station device according to the present embodiment can be provided with the function of the access point device. Similarly, the access point device according to the present embodiment can be provided with the function of a station device. Therefore, in the following, when simply referred to as a communication device, the communication device can refer to both a station device and an access point device.
- BSS Basic service set, management range
- the base station device and the terminal device in the BSS shall communicate with each other based on CSMA / CA (Carrier sense multiple access with collision avoidance).
- the infrastructure mode in which the base station device communicates with a plurality of terminal devices is targeted, but the method of the present embodiment can also be implemented in an ad hoc mode in which the terminal devices directly communicate with each other.
- the terminal device replaces the base station device and forms a BSS.
- BSS in ad hoc mode is also referred to as IBSS (Independent Basic Service Set).
- IBSS Independent Basic Service Set
- the terminal device forming the IBSS in the ad hoc mode can also be regarded as a base station device.
- the method of the present embodiment can also be carried out by WiFi Direct (registered trademark) in which terminal devices directly communicate with each other.
- WiFi Direct the terminal device replaces the base station device and forms a group.
- the terminal device of the Group owner that forms a Group in WiFi Direct can also be regarded as a base station device.
- each device can transmit transmission frames of a plurality of frame types having a common frame format.
- the transmission frame is defined by a physical (PHY) layer, a medium access control (MAC) layer, and a logical link control (LLC: Logical Link Control) layer, respectively.
- PHY physical
- MAC medium access control
- LLC Logical Link Control
- the transmission frame of the PHY layer is called a physical protocol data unit (PPDU: PHY protocol data unit, physical layer frame).
- the PPDU includes a physical layer header (PHY header) containing header information for performing signal processing in the physical layer, and a physical service data unit (PSDU: PHY service data unit, which is a data unit processed in the physical layer. MAC layer frame) etc.
- the PSDU can be composed of an aggregated MPDU (A-MPDU: Aggregated MPDU) in which a plurality of MAC protocol data units (MPDUs: MAC protocol data units), which are retransmission units in the radio section, are aggregated.
- A-MPDU Aggregated MPDU
- MPDUs MAC protocol data units
- a short training field (STF: Short training field) used for signal detection / synchronization, a long training field (LTF: Long training field) used to acquire channel information for data demodulation, etc.
- a reference signal and a control signal such as a signal (Signal: SIG) containing control information for data demodulation are included.
- STFs are Legacy STF (L-STF: Legacy-STF), High Throughput STF (HT-STF: Highthroughput-STF), and Ultra High Throughput STF (VHT-STF: Very), depending on the corresponding standard.
- LTF and SIG are also L-. It is classified into LTF, HT-LTF, VHT-LTF, HE-LTF, L-SIG, HT-SIG, VHT-SIG, HE-SIG, and EHT-SIG. VHT-SIG is further classified into VHT-SIG-A1, VHT-SIG-A2 and VHT-SIG-B. Similarly, HE-SIG is classified into HE-SIG-A1-4 and HE-SIG-B. In addition, a Universal SIGNAL (U-SIG) field containing additional control information can be included, assuming a technical update in the same standard.
- U-SIG Universal SIGNAL
- the PHY header can include information for identifying the BSS of the transmission source of the transmission frame (hereinafter, also referred to as BSS identification information).
- the information that identifies the BSS can be, for example, the SSID (Service Set Identifier) of the BSS or the MAC address of the base station device of the BSS.
- the information for identifying the BSS can be a value unique to the BSS (for example, BSS Color or the like) other than the SSID and the MAC address.
- PPDU is modulated according to the corresponding standard.
- the PPDU is modulated into an orthogonal frequency division multiplexing (OFDM) signal.
- OFDM orthogonal frequency division multiplexing
- the MPDU is a MAC layer header (MAC header) that includes header information for signal processing in the MAC layer, and a MAC service data unit (MSDU: MAC service data unit) that is a data unit processed in the MAC layer. It consists of a frame body and a frame inspection unit (Frame check sequence: FCS) that checks whether there are any errors in the frame. Further, a plurality of MSDUs can be aggregated as an aggregated MSDU (A-MSDU: Aggregated MSDU).
- MAC header MAC layer header
- MSDU MAC service data unit
- FCS frame inspection unit
- A-MSDU Aggregated MSDU
- the frame types of transmission frames in the MAC layer are roughly classified into three types: management frames that manage the connection status between devices, control frames that manage the communication status between devices, and data frames that include actual transmission data. Each is further classified into a plurality of subframe types.
- the control frame includes a reception completion notification (Ack: Acknowledge) frame, a transmission request (RTS: Request to send) frame, a reception preparation completion (CTS: Clear to send) frame, and the like.
- the management frame includes a beacon frame, a probe request frame, a probe response frame, an authentication frame, an association request frame, an association response frame, and the like. included.
- the data frame includes a data frame, a polling (CF-poll) frame, and the like. Each device can grasp the frame type and subframe type of the received frame by reading the contents of the frame control field included in the MAC header.
- Ac may include Block Ac.
- Block Ac can perform reception completion notification to a plurality of MPDUs.
- the beacon frame includes a period (Beacon interval) in which the beacon is transmitted and a field (Field) in which the SSID is described.
- the base station device can periodically notify the beacon frame in the BSS, and the terminal device can grasp the base station device around the terminal device by receiving the beacon frame.
- the fact that the terminal device grasps the base station device based on the beacon frame notified from the base station device is called passive scanning.
- searching for a base station device by notifying the probe request frame in the BSS by the terminal device is called active scanning.
- the base station apparatus can transmit a probe response frame as a response to the probe request frame, and the description content of the probe response frame is equivalent to that of the beacon frame.
- the terminal device After recognizing the base station device, the terminal device performs connection processing to the base station device.
- the connection process is classified into an authentication procedure and an association procedure.
- the terminal device sends an authentication frame (authentication request) to the base station device that wishes to connect.
- the base station device receives the authentication frame, it transmits an authentication frame (authentication response) including a status code indicating whether or not the terminal device can be authenticated to the terminal device.
- the terminal device can determine whether or not the own device has been authorized by the base station device.
- the base station device and the terminal device can exchange authentication frames a plurality of times.
- the terminal device sends a connection request frame to perform the connection procedure to the base station device.
- the base station device receives the connection request frame, it determines whether or not to allow the connection of the terminal device, and transmits a connection response frame to notify the fact.
- the association identification number (AID: Association identifier) for identifying the terminal device is described.
- the base station device can manage a plurality of terminal devices by setting different AIDs for the terminal devices for which connection permission has been issued.
- the base station device and the terminal device After the connection process is performed, the base station device and the terminal device perform the actual data transmission.
- a distributed control mechanism DCF: Distributed Coordination Function
- PCF centralized control mechanism
- EDCA Extended distributed channel access
- HCF Hybrid coordination function
- the base station device and the terminal device perform carrier sense (CS: Carrier sense) to confirm the usage status of the wireless channel around the own device prior to communication.
- CS Carrier sense
- CS Carrier sense
- a base station apparatus that is a transmitting station receives a signal on the radio channel higher than a predetermined clear channel evaluation level (CCA level: Clear channel assessment level)
- CCA level Clear channel assessment level
- the transmission of a transmission frame on the radio channel is transmitted. put off.
- a state in which a signal of CCA level or higher is detected is referred to as a busy state
- a state in which a signal of CCA level or higher is not detected is referred to as an idle state.
- Such CS performed based on the power (received power level) of the signal actually received by each device is called physical carrier sense (physical CS).
- the CCA level is also called a carrier sense level (CS level) or a CCA threshold (CCA threshold: CCAT).
- CS level carrier sense level
- CCA threshold CCAT
- the base station device performs carrier sense for the transmission frame to be transmitted only at the frame interval (IFS: Inter frame space) according to the type, and determines whether the wireless channel is in the busy state or the idle state.
- the carrier sense period of the base station device depends on the frame type and subframe type of the transmission frame to be transmitted by the base station device from now on.
- IFS Inter frame space
- SIFS Short IFS
- the base station device waits only for DIFS, and then waits for a random backoff time to prevent frame collision.
- a random backoff time called a contention window (CW) is used.
- CSMA / CA presupposes that a transmission frame transmitted by a certain transmitting station is received by the receiving station without interference from another transmitting station. Therefore, if the transmitting stations transmit transmission frames at the same timing, the frames collide with each other and the receiving station cannot receive the transmission frames correctly. Therefore, the frame collision is avoided by each transmitting station waiting for a randomly set time before the transmission starts.
- the base station device determines that the radio channel is in the idle state by the carrier sense, the CW countdown is started, the transmission right is acquired only when the CW becomes 0, and the transmission frame can be transmitted to the terminal device. If the base station apparatus determines that the radio channel is in a busy state by carrier sense during the CW countdown, the CW countdown is stopped. Then, when the radio channel becomes idle, the base station apparatus restarts the countdown of the remaining CW following the previous IFS.
- the terminal device which is the receiving station, receives the transmission frame, reads the PHY header of the transmission frame, and demodulates the received transmission frame. Then, the terminal device can recognize whether or not the transmission frame is addressed to the own device by reading the MAC header of the demodulated signal.
- the terminal device may determine the destination of the transmission frame based on the information described in the PHY header (for example, the group identifier (GID: Group identifier, Group ID) described in VHT-SIG-A). It is possible.
- the terminal device determines that the received transmission frame is addressed to its own device, and if the transmission frame can be demodulated without error, the terminal device transmits an ACK frame indicating that the frame was correctly received to the base station device which is the transmission station.
- the ACK frame is one of the highest priority transmission frames transmitted only by waiting for the SIFS period (no random backoff time is taken).
- the base station device ends a series of communication upon receiving the ACK frame transmitted from the terminal device. If the terminal device cannot receive the frame correctly, the terminal device does not transmit ACK. Therefore, if the base station apparatus does not receive the ACK frame from the receiving station for a certain period (SIFS + ACK frame length) after the frame transmission, the communication is considered to have failed and the communication is terminated.
- the termination of one communication (also called burst) of the IEEE 802.11 system is a special case such as the transmission of a broadcast signal such as a beacon frame or the case where fragmentation for dividing the transmission data is used. Except for this, it is always judged by whether or not the ACK frame is received.
- the terminal device determines that the transmission frame is not addressed to its own device, the terminal device determines that the transmission frame is not addressed to the own device, and based on the length of the transmission frame described in the PHY header or the like, the terminal device (NAV: Network allocation) vector) is set.
- the terminal device does not attempt communication for the period set in NAV. That is, since the terminal device performs the same operation as when the wireless channel is determined to be busy by the physical CS for the period set in NAV, the communication control by NAV is also called virtual carrier sense (virtual CS).
- the transmission request RTS: Request to send
- CTS Clear
- a control station In contrast to DCF, where each device performs carrier sense and autonomously acquires transmission rights, a control station called a point coordinator (PC) controls the transmission rights of each device in the BSS.
- PC point coordinator
- the base station device becomes a PC, and the transmission right of the terminal device in the BSS is acquired.
- the communication period by PCF includes a non-competitive period (CFP: Contention free period) and a competitive period (CP: Contention period).
- CFRP non-competitive period
- CP competitive period
- the base station apparatus which is a PC, notifies the beacon frame in which the CFP period (CFP Max duration) and the like are described in the BSS prior to the PCF communication.
- PIFS is used to transmit the beacon frame notified at the start of PCF transmission, and the beacon frame is transmitted without waiting for CW.
- the terminal device that has received the beacon frame sets the period of CFP described in the beacon frame to NAV.
- the terminal device After that, until the NAV elapses or a signal for notifying the end of CFP (for example, a data frame including CF-end) is received in the BSS, the terminal device signals the acquisition of the transmission right transmitted from the PC.
- the transmission right can be acquired only when a signal (for example, a data frame including CF-poll) is received. Since no packet collision occurs within the same BSS within the CFP period, each terminal device does not take the random backoff time used in the DCF.
- the wireless medium can be divided into a plurality of resource units (Resource units: RU).
- FIG. 4 is a schematic diagram showing an example of a divided state of the wireless medium.
- the wireless communication device can divide the frequency resource (subcarrier), which is a wireless medium, into nine RUs.
- the wireless communication device can divide the subcarrier, which is a wireless medium, into five RUs.
- the resource division example shown in FIG. 4 is only one example, and for example, a plurality of RUs can be configured by different numbers of subcarriers.
- the radio medium divided as the RU can include not only frequency resources but also spatial resources.
- a wireless communication device can transmit a frame to a plurality of terminal devices (for example, a plurality of STAs) at the same time by arranging frames addressed to different terminal devices in each RU.
- the AP can describe information (Resource allocation information) indicating the division state of the wireless medium as common control information in the PHY header of the frame transmitted by the own device. Further, the AP can describe the information (resource unit assignment information) indicating the RU in which the frame addressed to each STA is arranged in the PHY header of the frame transmitted by the own device as the unique control information.
- a plurality of terminal devices can transmit frames at the same time by arranging frames in their assigned RUs and transmitting them.
- the plurality of STAs can perform frame transmission after waiting for a predetermined period after receiving a frame (Trigger frame: TF) including trigger information transmitted from the AP.
- TF Trigger frame
- Each STA can grasp the RU assigned to its own device based on the information described in the TF.
- each STA can acquire RU by random access based on the TF.
- the AP can assign multiple RUs to one STA at the same time.
- the plurality of RUs may be composed of continuous subcarriers or discontinuous subcarriers.
- the AP can transmit one frame by using a plurality of RUs assigned to one STA, and can transmit a plurality of frames by assigning them to different RUs.
- At least one of the plurality of frames can be a frame containing common control information for a plurality of terminal devices for transmitting Resource allocation information.
- One STA can be assigned multiple RUs from the AP.
- the STA can transmit one frame using a plurality of assigned RUs. Further, the STA can allocate a plurality of frames to different RUs and transmit the plurality of frames by using the plurality of assigned RUs.
- the plurality of frames can be frames of different frame types.
- the AP can assign multiple AIDs to one STA.
- the AP can assign RU to each of a plurality of AIDs assigned to one STA.
- the AP can transmit different frames to a plurality of AIDs assigned to one STA by using the assigned RUs.
- the different frames can be frames of different frame types.
- One STA can be assigned multiple AIDs from the AP.
- One STA can be assigned a RU for each of a plurality of assigned AIDs.
- One STA recognizes that the RUs assigned to the plurality of AIDs assigned to the own device are all the RUs assigned to the own device, and transmits one frame using the plurality of assigned RUs. can do.
- one STA can transmit a plurality of frames by using the plurality of assigned RUs. At this time, in the plurality of frames, information indicating the AID associated with the assigned RU can be described and transmitted.
- the AP can transmit different frames to a plurality of AIDs assigned to one STA by using the assigned RUs.
- the different frames can be frames of different frame types.
- the base station device and the terminal device are collectively referred to as a wireless communication device or a communication device. Further, the information exchanged when one wireless communication device communicates with another wireless communication device is also referred to as data. That is, the wireless communication device includes a base station device and a terminal device.
- FIG. 1 is a diagram showing an example of a PPDU configuration transmitted by a wireless communication device.
- the PPDU corresponding to the IEEE802.11a / b / g standard has a configuration including L-STF, L-LTF, L-SIG and Data frames (MAC Frame, MAC frame, payload, data part, data, information bit, etc.). be.
- the PPDU corresponding to the IEEE802.11n standard has a configuration including L-STF, L-LTF, L-SIG, HT-SIG, HT-STF, HT-LTF and Data frames.
- PPDUs corresponding to the IEEE802.11ac standard include some or all of L-STF, L-LTF, L-SIG, VHT-SIG-A, VHT-STF, VHT-LTF, VHT-SIG-B and MAC frames. It is a composition.
- the PPDUs considered in the IEEE802.11ax standard are RL-SIG, HE-SIG-A, HE-STF, HE- in which L-STF, L-LTF, L-SIG, and L-SIG are repeated in time. It is a configuration including a part or all of LTF, HE-SIG-B and Data frames.
- the PPDUs being considered in the IEEE802.11be standard are part of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, EHT-SIG, EHT-STF, HET-LTF and Data frames or It is a composition that includes everything.
- L-STF, L-LTF and L-SIG surrounded by the dotted line in FIG. 1 have configurations commonly used in the 802.11 standard (hereinafter, L-STF, L-LTF and L-SIG). Collectively referred to as L-header).
- a wireless communication device corresponding to the IEEE 802.11a / b / g standard can appropriately receive the L-header in the PPDU corresponding to the IEEE 802.11n / ac standard.
- a wireless communication device corresponding to the IEEE 802.11a / b / g standard can receive a PPDU corresponding to the IEEE 802.11n / ac standard as a PPDU corresponding to the IEEE 802.11a / b / g standard. ..
- the wireless communication device corresponding to the IEEE802.11a / b / g standard cannot demodulate the PPDU corresponding to the IEEE802.11n / ac standard following the L-header, the transmission address (TA: Transmitter Addless) is not possible. ), Receive address (RA: Receiver Addless), and information about the Duration / ID field used to set NAV cannot be demodulated.
- IEEE 802.11 inserts Duration information into L-SIG. It stipulates how to do it.
- Information on the transmission speed in L-SIG (RATE field, L-RATE field, L-RATE, L_DATRATE, L_DATARATE field), information on the transmission period (LENGTH field, L-LENGTH field, L-LENGTH) is 80.IE.
- a wireless communication device corresponding to the 11a / b / g standard is used to properly set the NAV.
- FIG. 2 is a diagram showing an example of a method of Duration information inserted in L-SIG.
- FIG. 2 shows, as an example, a PPDU configuration corresponding to the IEEE802.11ac standard, but the PPDU configuration is not limited to this.
- a PPDU configuration corresponding to the IEEE802.11n standard and a PPDU configuration corresponding to the IEEE802.11ax standard may be used.
- the TXTIME contains information about the length of the PPDU
- the aPreambleLength contains information about the length of the preamble (L-STF + L-LTF)
- the aPLCPHeaderLength contains information about the length of the PLCP header (L-SIG).
- L_LENGTH is information about the period of Signal Extension, Numbers related to L_RATE , one symbol (symbol, OFDM symbol, etc.), which is a virtual period set for compatibility with the IEEE802.11 standard, aSymbolLength, It is calculated based on aPLCPServiceLength, which indicates the number of bits included in the PLCP Service field, and aPLCPConvolutionalTailLength, which indicates the number of tail bits of the convolution code.
- the wireless communication device can calculate L_LENGTH and insert it into L-SIG. Further, the wireless communication device can calculate the L-SIG Duration.
- the L-SIG Duration presents information about the total period of the PPDU containing L_LENGTH and the Ac and SIFS periods expected to be transmitted from the destination wireless communication device in response.
- FIG. 3 is a diagram showing an example of L-SIG Duration in L-SIG TXOP Protection.
- DATA (frames, payloads, data, etc.) consists of MAC frames and / or parts of PLCP headers.
- BA is Block Ac or Ac.
- the PPDU may include L-STF, L-LTF, L-SIG, and may further comprise any or more of DATA, BA, RTS or CTS.
- L-SIG TXOP Protection using RTS / CTS is shown, but CTS-to-Self may be used.
- MAC Duration is a period indicated by the value of Duration / ID field.
- the Initiator can transmit a CF_End frame to notify the end of the L-SIG TXOP Protection period.
- the wireless communication device that transmits the PPDU provides the PPDU with information (BSS color, BSS identification information, a value unique to the BSS) for identifying the BSS. It is preferable to insert it.
- Information indicating BSS color can be described in HE-SIG-A.
- the wireless communication device can transmit L-SIG multiple times (L-SIG Repetition). For example, the wireless communication device on the receiving side receives the L-SIG transmitted a plurality of times by using MRC (Maximum Rio Combining), so that the demodulation accuracy of the L-SIG is improved. Further, the wireless communication device can interpret that the PPDU including the L-SIG is a PPDU corresponding to the IEEE802.11ax standard when the L-SIG is correctly received by the MRC.
- MRC Maximum Rio Combining
- the wireless communication device performs a reception operation of a part of the PPDU other than the PPDU (for example, a preamble, L-STF, L-LTF, PLCP header, etc. defined by 802.11) even during the reception operation of the PPDU. (Also called double reception operation).
- a reception operation of a part of the PPDU other than the PPDU for example, a preamble, L-STF, L-LTF, PLCP header, etc. defined by 802.11
- the wireless communication device updates a part or all of the destination address, the source address, and the information about the PPDU or the DATA period. Can be done.
- Ack and BA can also be referred to as a response (response frame). Further, a probe response, an authentication response, and a connection response can be referred to as a response. [1. First Embodiment]
- the Multi-AP wireless communication system is composed of a wireless communication system provided by two or more access point devices.
- FIG. 5 is a diagram showing an example of the Multi-AP wireless communication system according to the present embodiment, and is an example composed of the wireless communication system 3-1, the wireless communication system 3-2, and the wireless communication system 3-3.
- the wireless communication system 3-1, the wireless communication system 3-2, and the wireless communication system 3-3 are sub-wireless communication systems constituting the Multi-AP wireless communication system, and the sub-wireless communication system 3-1 and the sub-wireless communication system are sub-wireless communication systems. Also referred to as 3-2 and sub-wireless communication system 3-3.
- frames were transmitted and received between one access point device and the station device connected to it (associating).
- the Multi-AP wireless communication system in addition to the conventional technology, it is also aimed that a plurality of access point devices cooperate to transmit and receive frames to and from the station device.
- the communication areas (coverages) provided by each sub-wireless communication system are configured to overlap.
- the dashed ellipse indicating each sub-wireless communication system 3-1, 3-2, 3-3 indicates the coverage of each sub-radio communication system.
- FIG. 5 shows an example in which the Multi-AP wireless communication system is composed of three sub-wireless communication systems, but of course, it may be composed of a plurality of sub-wireless communication systems other than the three.
- the sub-wireless communication system 3-1 includes a wireless communication device 1-1 and wireless communication devices 2-1, 2-12, 2-13, and 2-123.
- the wireless communication device 1-1 is also referred to as an access point device (base station device) 1-1
- the wireless communication devices 2-1, 2-12, 2-13, and 2-123 are station devices (terminal devices) 2.
- the wireless communication devices 2-1, 2-12, 2-13, and 2-123 are also referred to as station devices 2A as devices that are connected (associated) to the access point device 1-1.
- the access point device 1-1 and the station device 2A are wirelessly connected and are in a state where they can transmit and receive PPDUs to each other.
- station device 2-12 is connected to (associates with) the access point device 1-1, it can also transmit and receive frames in cooperation with the access point device 1-2.
- station device 2-13 is connected to (associates with) the access point device 1-1, it can also transmit and receive frames in cooperation with the access point device 1-3.
- station device 2-123 is connected to (associates with) the access point device 1-1, it can also send and receive frames that cooperate with the access point device 1-2 and the access point device 1-3. ..
- Station devices 2-12, 2-13, and 2-123 that transmit and receive frames in cooperation with other than the access point device to which the own device is connected (association) are also referred to as station device 2AX.
- the station device 2-1 transmits and receives frames only to the access point device 1-1, which is the connection destination (association destination).
- the sub-wireless communication system 3-2 includes a wireless communication device 1-2 and wireless communication devices 2-2, 2-21, 2-23, 2-213.
- the wireless communication device 1-2 is also referred to as an access point device (base station device) 1-2
- the wireless communication devices 2-2, 2-21, 2-23, and 2-213 are station devices (terminal devices) 2.
- the wireless communication device 2-2, 2-21, 2-23, 2-213 is also referred to as a station device 2B as a device connected (associated) to the access point device 1-2.
- the access point device 1-2 and the station device 2B are wirelessly connected and are in a state where they can transmit and receive PPDUs to each other.
- station device 2-21 is connected to (associates with) the access point device 1-2, it can also transmit and receive frames in cooperation with the access point device 1-1.
- station device 2-23 is connected to (associates with) the access point device 1-2, it can also transmit and receive frames in cooperation with the access point device 1-3.
- station device 2-123 is connected to (associates with) the access point device 1-1, it can also send and receive frames that cooperate with the access point device 1-2 and the access point device 1-3. ..
- Station devices 2-21, 2-23, and 2-213 that transmit and receive frames in cooperation with other than the access point device to which the own device is connected (association) are also referred to as station device 2BX.
- the station device 2-2 transmits / receives frames only to the access point device 1-2 which is the connection destination (association destination).
- the sub-wireless communication system 3-3 includes a wireless communication device 1-3 and a wireless communication device 2-3, 2-31, 2-32, 2-312.
- the wireless communication device 1-3 is also referred to as an access point device (base station device) 1-3
- the wireless communication devices 2-3, 2-31, 2-32, 2-312 are station devices (terminal devices) 2.
- a station device 2C As a device that connects (associates) the wireless communication devices 2-3, 2-31, 2-32, and 2-312 to the access point device 1-3, it is also referred to as a station device 2C.
- the access point device 1-3 and the station device 2C are wirelessly connected and are in a state where they can transmit and receive PPDUs to each other.
- station device 2-31 is connected to (associates with) the access point device 1-3, it is also possible to send and receive frames in cooperation with the access point device 1-1.
- station device 2-32 is connected to (associates with) the access point device 1-3, it can also transmit and receive frames in cooperation with the access point device 1-2.
- station device 2-312 is connected to (associates with) the access point device 1-3, it can also send and receive frames that cooperate with the access point device 1-1 and the access point device 1-2. ..
- Station devices 2-31, 2-32, 2-312 that transmit and receive frames in cooperation with other than the access point device to which the own device is connected (association) are also referred to as station device 2CX.
- the station device 2-3 transmits and receives frames only to the access point device 1-3, which is the connection destination (association destination).
- Each of the wireless communication devices (access point devices) 1-1, 1-2, and 1-3 constitutes a (sub) wireless communication system, but at least one access point device is a parent access point device (parent AP, Coordinator access). As a point device, Coordinator AP, Sharing access point device, Sharing AP, etc.), it is a child access point device (child AP, Coordinated access point device, Coordinated AP, Shared access point device, Shared AP) that is another access point device. , Etc.) are centrally controlled and give instructions. Further, the Coordinator access point device may handle a data frame transmitted to a station device connected to each access point device or a data frame received from the station device. That is, the data frame transmitted by the Coordinator access point device may be received by the station device via the Coordinator access point device. Further, the data frame transmitted by the station device may be received by the Coordinator access point device via the connected (associating) access point device.
- FIG. 5 will be described as assuming that the Coordinator access point devices 1-2 and 1-3 are connected to the Coordinator access point device 1-1, but this is merely an example. be.
- the access point device 1-2 is connected to the Coordinator access point device 1-1
- the access point device 1-3 is connected to the access point device 1-2
- the access point device 1-3 is further connected.
- Other access point devices may also be connected.
- FIG. 9 shows an example of the MAC Frame format.
- the MAC Frame refers to a Data frame (MAC Frame, MAC frame, payload, data unit, data, information bit, etc.) in FIG. 1 and a MAC Frame in FIG. 2.
- MACFrame includes FrameControl, Duration / ID, Address1, Address2, Address3, SequenceControl, Address4, QoSControl, HTControl, FrameBody, and FCS.
- the sub-wireless communication system 3-1, the sub-wireless communication system 3-2, and the sub-wireless communication system 3-3 form different BSS, but this does not necessarily mean that the ESS (Extended Service Set) is different.
- ESS represents a service set that forms a LAN (Local Area Network). That is, wireless communication devices belonging to the same ESS can be regarded as belonging to the same network from the upper layer. Further, BSS is combined via DS (Distribution System) to form ESS. It should be noted that each of the sub-wireless communication systems 3-1, 3-2, and 3-3 can be further equipped with a plurality of wireless communication devices.
- FIG. 10 summarizes the addresses written in the fields of Address1, Address2, Address3, and Address4 included in FIG. 9 in a table classified according to the values of FromDS and ToDS.
- FromDS and ToDS information is included in the FrameControl field in FIG.
- the value of FromDS is 1 when the frame is transmitted from the DS and 0 when the frame is transmitted from other than the DS.
- the value of ToDS is 1 when the frame is received by the DS, and 0 when the frame is received by other than the DS.
- SA refers to Source Address (source address, reference source address)
- DA Destination Address (destination address, forwarding address).
- the table of FIG. 10 shows that the meanings of Address 1 to Address 4 change depending on the values of FromDS and ToDS.
- FIG. 6 is a diagram showing an example of a device configuration of wireless communication devices 1-1, 1-2, 1-3, 2A, 2B, and 2C (hereinafter collectively referred to as wireless communication devices 10000-1). ..
- the wireless communication device 10000-1 includes an upper layer unit (upper layer processing step) 10001-1, an autonomous distributed control unit (autonomous distributed control step) 10002-1, a transmission unit (transmission step) 1003-1, and a reception unit. (Reception step)
- the configuration includes the 1004-1 and the antenna unit 1005-1.
- the upper layer unit 10001-1 is connected to another network and can notify the autonomous distributed control unit 10002-1 of information regarding traffic.
- the information related to the traffic may be, for example, information addressed to another wireless communication device, or may be control information included in a management frame or a control frame.
- FIG. 7 is a diagram showing an example of the device configuration of the autonomous distributed control unit 10002-1.
- the autonomous distributed control unit 10002-1 includes a CCA unit (CCA step) 10002a-1, a backoff unit (backoff step) 10002b-1, and a transmission determination unit (transmission determination step) 10002c-1. be.
- CCA step CCA step
- backoff step backoff step
- transmission determination step transmission determination step
- the CCA unit 10002a-1 uses one or both of the information regarding the received signal power received via the radio resource and the information regarding the received signal (including the information after decoding) notified from the receiving unit. ,
- the state of the radio resource can be determined (including the determination of busy or idle).
- the CCA unit 10002a-1 can notify the backoff unit 10002b-1 and the transmission determination unit 10002c-1 of the state determination information of the radio resource.
- the backoff unit 10002b-1 can perform backoff by using the state determination information of the radio resource.
- the back-off unit 10002b-1 generates a CW and has a countdown function. For example, the CW countdown can be executed when the radio resource status determination information indicates idle, and the CW countdown can be stopped when the radio resource status determination information indicates busy.
- the back-off unit 10002b-1 can notify the transmission determination unit 10002c-1 of the value of CW.
- the transmission determination unit 10002c-1 makes a transmission determination using either or both of the radio resource status determination information and the CW value. For example, when the state determination information of the radio resource indicates idle and the CW value is 0, the transmission determination information can be notified to the transmission unit 1003-1. Further, when the state determination information of the radio resource indicates idle, the transmission determination information can be notified to the transmission unit 1003-1.
- the transmission unit 1003-1 is configured to include a physical layer frame generation unit (physical layer frame generation step) 10003a-1 and a wireless transmission unit (wireless transmission step) 1003b-1.
- the physical layer frame generation unit 10003a-1 has a function of generating a physical layer frame (PPDU) based on the transmission determination information notified from the transmission determination unit 10002c-1.
- the physical layer frame generation unit 10003a-1 performs error correction coding, modulation, pre-recording filter multiplication, and the like on the transmission frame sent from the upper layer.
- the physical layer frame generation unit 10003a-1 notifies the radio transmission unit 1003b-1 of the generated physical layer frame.
- FIG. 8 is a diagram showing an example of error correction coding of the physical frame generation unit according to the present embodiment.
- an information bit (systematic bit) sequence is arranged in the shaded area, and a redundant (parity) bit sequence is arranged in the white area.
- Bit interleavers are appropriately applied to the information bits and redundant bits.
- the physical frame generator can read out the required number of bits as the start position determined according to the value of the redundancy version (RV) for the arranged bit series. By adjusting the number of bits, it is possible to flexibly change the coding rate, that is, puncture.
- RVs four RVs are shown in FIG. 8, the RV options are not limited to specific values in the error correction coding according to the present embodiment. The position of the RV needs to be shared between the station devices.
- the physical layer frame generator applies error correction coding to the information bits transferred from the MAC layer, but the unit (encoding block length) for performing error correction coding is not limited to anything. do not have.
- the physical layer frame generator may divide the information bit sequence transferred from the MAC layer into information bit sequences of a predetermined length, apply error correction coding to each, and form a plurality of coding blocks. can. When configuring the coding block, a dummy bit can be inserted into the information bit sequence transferred from the MAC layer.
- the frame generated by the physical layer frame generation unit 10003a-1 contains control information.
- the control information includes information indicating to which RU (where the RU includes both frequency resources and spatial resources) the data destined for each radio communication device is located.
- the frame generated by the physical layer frame generation unit 10037a-1 includes a trigger frame instructing the wireless communication device, which is the destination terminal, to transmit the frame.
- the trigger frame contains information indicating the RU used when the wireless communication device instructed to transmit the frame transmits the frame.
- the radio transmission unit 10003b-1 converts the physical layer frame generated by the physical layer frame generation unit 1003a-1 into a signal in the radio frequency (RF: Radio Frequency) band, and generates a radio frequency signal.
- the processing performed by the wireless transmission unit 1003b-1 includes digital-to-analog conversion, filtering, frequency conversion from the baseband band to the RF band, and the like.
- the receiving unit 1004-1 has a configuration including a wireless receiving unit (radio receiving step) 1004a-1 and a signal demodulation unit (signal demodulation step) 1004b-1.
- the receiving unit 1004-1 generates information on the received signal power from the RF band signal received by the antenna unit 1005-1.
- the receiving unit 1004-1 can notify the CCA unit 10002a-1 of the information regarding the received signal power and the information regarding the received signal.
- the radio receiving unit 10048a-1 has a function of converting an RF band signal received by the antenna unit 1005-1 into a baseband signal and generating a physical layer signal (for example, a physical layer frame).
- the processing performed by the radio receiving unit 1004a-1 includes frequency conversion processing from the RF band to the baseband band, filtering, and analog-to-digital conversion.
- the signal demodulation unit 1004b-1 has a function of demodulating the physical layer signal generated by the radio reception unit 1004a-1.
- the processing performed by the signal demodulation unit 1004b-1 includes channel equalization, demapping, error correction and decoding, and the like.
- the signal demodulation unit 1004b-1 can extract, for example, the information included in the physical layer header, the information included in the MAC header, and the information included in the transmission frame from the physical layer signal.
- the signal demodulation unit 1004b-1 can notify the upper layer unit 10001-1 of the extracted information.
- the signal demodulation unit 1004b-1 can extract any or all of the information included in the physical layer header, the information included in the MAC header, and the information included in the transmission frame.
- the antenna unit 1005-1 has a function of transmitting the radio frequency signal generated by the radio transmission unit 1003b-1 to the radio device 0-1 in the radio space. Further, the antenna unit 1005-1 has a function of receiving a radio frequency signal transmitted from the radio device 0-1.
- the wireless communication device 10000-1 describes the information indicating the period during which the own device uses the wireless medium in the PHY header and the MAC header of the frame to be transmitted, so that the wireless communication device around the own device is subjected to NAV only during that period. Can be set.
- the wireless communication device 10000-1 can describe information indicating the period in the Duration / ID field or the Length field of the frame to be transmitted.
- the NAV period set in the wireless communication device around the own device is referred to as the TXOP period (or simply TXOP) acquired by the wireless communication device 10000-1.
- the wireless communication device 10000-1 that has acquired the TXOP is referred to as a TXOP acquirer (TXOP holder).
- the frame type of the frame transmitted by the wireless communication device 10000-1 to acquire TXOP is not limited to anything, and may be a control frame (for example, an RTS frame or a CTS-to-self frame) or a data frame. But it's okay.
- the wireless communication device 10000-1 which is a TXOP holder can transmit a frame between the TXOPs to a wireless communication device other than the own device.
- the wireless communication device 1-1 can transmit a frame to the wireless communication device 2A within the period of the TXOP. Further, the wireless communication device 1-1 can instruct the wireless communication device 2A to transmit a frame addressed to the wireless communication device 1-1 within the TXOP period.
- the wireless communication device 1-1 can transmit a trigger frame including information instructing the wireless communication device 1-1 to transmit a frame to the wireless communication device 2A within the TXOP period.
- the wireless communication device 1-1 may secure TXOP for all communication bands (for example, Operation bandwidth) that may transmit frames, or may secure TXOP for a communication band (for example, Transmission bandwidth) that actually transmits frames. It may be secured for a specific communication band (Band) of.
- the wireless communication device that gives an instruction to transmit a frame within the TXOP period acquired by the wireless communication device 1-1 is not necessarily limited to the wireless communication device connected to the own device.
- the wireless communication device is a wireless communication device that is not connected to the own device in order to transmit a management frame such as a reception frame or a control frame such as an RTS / CTS frame to the wireless communication device in the vicinity of the own device. , You can instruct the transmission of frames.
- TXOP in EDCA which is a data transmission method different from DCF
- the IEEE802.11e standard relates to EDCA, and specifies TXOP from the viewpoint of quality of service (QoS) guarantee for various services such as video transmission and VoIP.
- Services are broadly classified into four access categories: VO (VOice), VI (VIdeo), BE (Best Effort), and BK (BacK ground).
- VO VOice
- VI VI
- BE Best Effort
- BK BacK ground
- the order is VO, VI, BE, BK from the highest priority.
- each access category there are parameters of CW minimum value CWmin, maximum value CWmax, AIFS (Arbitration IFS) which is a kind of IFS, and TXOP limit which is the upper limit of transmission opportunity, so that the difference in priority can be given.
- the value is set.
- CWmin, CWmax, and AIFS which have the highest priority for voice transmission, are set to values relatively small compared to other access categories, so that the data is prioritized over other access categories. Transmission becomes possible. For example, in a VI in which the amount of transmission data is relatively large due to video transmission, it is possible to take a longer transmission opportunity than in other access categories by setting the TXOP limit large. In this way, the values of the four parameters of each access category are adjusted for the purpose of guaranteeing QoS according to various services.
- the signal demodulation unit of the station device can perform decoding processing on the received signal in the physical layer and perform error detection.
- the decoding process includes a decoding process for the error correction code applied to the received signal.
- the error detection includes error detection using an error detection code (for example, a cyclic redundancy check (CRC) code) given in advance to the received signal, and an error correction code (for example, low density parity) originally provided with an error detection function. Includes error detection by check code (LDPC)).
- CRC cyclic redundancy check
- LDPC error correction code
- the upper layer unit transfers the result of decoding the physical layer in the signal demodulation unit to the MAC layer.
- the signal of the MAC layer is restored from the decoded result of the transferred physical layer.
- error detection is performed, and it is determined whether or not the signal of the MAC layer transmitted by the station device that is the transmission source of the received frame can be correctly restored.
- the radio channel used by the Multi-AP radio system is composed of four radio subchannels CH1, CH2, CH3, and CH4 having a frequency bandwidth of 80 MHz and a frequency bandwidth of 20 MHz.
- the sub-wireless communication system 3-1 managed by 1 uses CH1 and CH2, the sub-wireless communication system 3-2 managed by the access point device 1-2 uses CH3, and the access point device 1-3 manages it. It is assumed that the sub-wireless communication system 3-3 uses CH4.
- the access point device 1-1 transmits the frame 11-21 and the frame 11-22 to the station device 2AX
- the access point device 1-2 transmits the frame 11-23 to the station device 2BX
- the access point device 1-. 3 transmits frames 11-24 to the station device 2CX.
- frequency resources are allocated so as to be orthogonal to the frequency axis direction, and the left ends of the frames are aligned in the time axis direction, and the right ends of the frames are also aligned. .. This indicates that frames 11-21 to 11-24 are transmitted by OFDMA.
- each access point device it is a transmission by OFDMA to a plurality of station devices connected to each of the plurality of access point devices, and is referred to as Coordinated OFDMA because each access point device cooperates with each other.
- the combination of frames 11-21 to 11-24 in the downlink direction transmitted from the access point device to the station device has been described, but frames 11-31 to 11-34 in the uplink direction transmitted from the station device to the access point device have been described.
- the combination of may be transmitted by Coordinated OFDMA.
- the wireless communication device 1-1 is a Coordinator access point device, and the wireless communication devices 1-2 and 1-3 are Coordinator access point devices.
- the Coordinator access point device 1-1 grasps in advance the required radio resources (frequency resources, bandwidth, number of radio channels, spatial resources, transmission data amount, reception data amount, etc.) required by each access point device. There is. Normally, the Coordinator access point device queries the Coordinator access point device, and the Coordinator access point device returns the requested radio resource to the Coordinator access point device. Alternatively, each Coordinator access point device may voluntarily notify the Coordinator access point device of the requested radio resource.
- the Coordinator access point device 1-1 determines how to allocate or distribute the TXOP secured by itself to each access point device according to the requested radio resource obtained in advance, as a trigger frame 11-11. Notify by transmitting ⁇ 11-14 to each access point device.
- the trigger frame the radio resource allocation information to each access point device, the total TXOP information corresponding to all the TXOPs secured by the Coordinator access point device, and the downlink TXOP related to the TXOP reserved for the downlink communication.
- Information, uplink TXOP information related to TXOP secured for uplink communication, and the like are described.
- the downlink TXOP information includes information related to the downlink frame transmission end time t1 and t3 from each access point device to each station device.
- the uplink TXOP information includes information related to the uplink frame transmission end time t2, t4, and the like from each station device to each access point device.
- the total TXOP information includes information related to the end time t5 of all downlink communication and uplink communication.
- the Coordinator access point device 1-1 uses the radio channels CH1 and CH2, the coordinated access point device 1-2 uses the radio channel CH3, and the coordinated access point device 1-3 uses the radio channel CH3 for the radio resource allocation information. It is assumed that channel CH4 is specified to be used.
- the access point device 1-1 transmits the frame 11-21 on CH1 and the frame 11-22 on CH2 to the station device 2AX.
- the access point device 1-2 transmits frames 11-23 to the station device 2BX via CH3.
- the access point device 1-3 transmits frames 11-24 on CH4 to the station device 2CX.
- the access point device 1-1 manages CH1 and CH2 and uses them in the sub-wireless communication system 3-1 to use the access point device 1-2.
- the radio channel allocation method described in this paragraph is an example for explanation, and of course, other allocation methods are possible.
- the station device that has received frames 11-21 to 11-24 transmits response frames 11-31 to 11-34 to the access point device.
- frames 11-21 to 11-24 also serve as a trigger frame for the station device to transmit an uplink data frame. Therefore, the frames 11-31 to 11-34 transmitted by the station device to the access point device may include uplink data in addition to the response to the frames 11-21 to 11-24.
- the access point device that has received the frames 11-31 to 11-34 transmits the response frames 11-41 to 11-44 to the station device.
- Frames 11-41 to 11-44 transmitted by the access point device to the station device may include downlink data in addition to the response to frames 11-31 to 11-34.
- the access point device receives the uplink frame (11-31 to 11-34) after transmitting the downlink frame (11-21 to 11-24), and then the downlink frame (11-41).
- ⁇ 11-44) This is an example in which the uplink frame (11-51 to 11-54) is received after the transmission, and finally the response frame (11-61 to 11-64) is transmitted to end the transmission. That is, the combination of downlink frame transmission / reception and uplink frame transmission / reception is executed twice, but the execution of this combination is not limited to two times, and may be executed three or more times. Further, the radio resource allocation information notified to each access point device in the trigger frames 11-11 to 11-14 is valid until the end of all downlink frame transmission / reception and uplink frame transmission / reception within the total TXOP section.
- the radio resources (frequency resources, bandwidth, number of radio channels, spatial resources, etc.) allocated to each of the downlink communication and the uplink communication of each sub-wireless communication system are common, for example, the size and position of the frequency resources. Is common.
- the access point device 1-1 manages CH1 and CH2 and is used in the sub-wireless communication system 3-1.
- the access point device 1-2 manages CH3 and uses the sub-wireless communication system 3.
- the access point device 1-3 manages CH4 and uses it in the sub-wireless communication system 3-3.
- a wide bandwidth is required for downlink communication of a large amount of data, while a narrow bandwidth is sufficient because the amount of data in the uplink communication is small.
- One of the problems is that the wide bandwidth allocated to the uplink communication period cannot be fully utilized due to the small amount of uplink data, and all of them cannot be effectively used up.
- the wireless communication device allocates different wireless resources to the downlink communication and the uplink communication of each sub-wireless communication system constituting the Multi-AP wireless communication system, for example, large size. Allows allocation of frequency resources with different pod positions.
- the sub-wireless communication system 3-2 uses only CH3 for uplink communication, but in FIG. 12, it can be seen that CH4 is also used in addition to CH3 for uplink communication. And FIG. 12.
- the amount of communication data shall be expressed in 4 stages from 1 to 4. It is assumed that the communication data amount 4 indicates the maximum and the communication data amount 1 indicates the minimum.
- Sub-wireless communication system 3-1 has a downlink communication data amount of 4, uplink communication data amount of 4, sub-wireless communication system 3-2 has a downlink data amount of 2, uplink data amount of 3, and sub-wireless communication system 3-3 has a downlink communication data amount of 3. It is assumed that the amount of downlink data is 2 and the amount of uplink data is 1.
- These relative communication data amount values are the required radio resources (frequency resources, bandwidth, number of radio channels, spatial resources, downlink communication data amount, uplink communication data amount, etc.) reported in advance by each access point.
- the Coordinator access point device 1-1 which plays the role of centralized control, and similar wireless communication devices and devices calculate according to the value of, and determine the wireless resource to be allocated to each access point device according to the value.
- the radio resource information (frequency resource, bandwidth, number of radio channels, spatial resource, etc.) distinguished between the downlink communication and the uplink communication is transmitted to each access point device at the trigger frames 12-11 to 12-14. You will be notified. An example of allocating frequency resources among radio resources will be described.
- the access point device 1-1 manages CH1 and CH2 and is used in the sub-wireless communication system 3-1.
- the access point device 1-2 manages CH3 and uses the sub-wireless communication system 3-2. It is specified that the wireless communication device 1-3 manages CH4 and is used in the sub-wireless communication system 3-3.
- the access point device 1-1 manages CH1 and CH2 and is used in the sub-wireless communication system 3-1.
- the access point device 1-2 manages CH3 and uses the sub-wireless communication system 3-2.
- the sub-wireless communication device 1-3 manages CH4, but it can be used non-exclusively and specifically shared by the sub-wireless communication system 3-3 and the sub-wireless communication system 3-2. It is specified.
- the grounds for the frequency resource allocation mentioned above will be explained. Since the access point device 1-1 requires a large amount of communication data (communication data amount 4) for both downlink communication and uplink communication, CH1 and CH2 are used for downlink communication, and CH1 is used for uplink communication. CH2 is managed and assigned so that it can be used in the sub-wireless communication system 3-1.
- the access point device 1-2 requires a medium-capacity communication data amount (communication data amount 2) for downlink communication and a relatively large communication data amount (communication data amount 3) for uplink communication. .. Therefore, in addition to managing CH3 for downlink communication and allocating it so that it can be used in the sub-wireless communication system 3-2, CH3 can be managed and used in the sub-wireless communication system 3-2 for uplink communication.
- the frequency resource of CH4 under the control of the access point device 1-3 is allocated to be shared.
- the access point devices 1-3 require a medium-capacity communication data amount (communication data amount 2) for downlink communication and a small-capacity communication data amount (communication data amount 1) for uplink communication. Therefore, while CH4 is managed and assigned to the downlink communication so that it can be used in the sub-wireless communication system 3-3, CH4 is managed in the uplink communication but wirelessly in the own sub-wireless communication system (3-3). Due to the fact that the resources cannot be used up sufficiently, the frequency resources of CH4 under control are allocated to be shared with the sub-wireless communication system 3-2 managed by the access point device 1-2.
- frequency resources of different sizes and positions are allocated to the downlink communication and uplink communication of each sub-wireless communication system that constitutes the Multi-AP wireless communication system, but the same idea is applied to downlink communication. It can also be applied to assign different other radio resources to each of the uplink communications. For example, it can be applied to allocate spatial resources of different sizes and positions.
- a certain access point device uses the managed wireless resource (frequency resource CH4 in this example) as its own sub-wireless communication system (3-3 in this example) in uplink communication. It can be shared with other sub-wireless communication systems (3-2 in this example) without being used only.
- one sub-radio communication system (3-2 in this example) is a radio managed by another access point device (1-3 in this example) constituting another sub-radio communication system (3-3 in this example).
- a resource (frequency resource CH4 in this example) can be shared in uplink communication.
- the Coordinator access point device 1-1 is a request radio resource (frequency resource, bandwidth, radio) from the access point device (1-1, 1-2, 1-3) constituting each sub-radio communication system.
- Each access point device (1-1, 1-2, 1-3) that is, each sub wireless communication system (3-) according to the number of channels, spatial resources, downlink communication data amount, uplink communication data amount, etc.) It is possible to flexibly allocate wireless resources for downlink communication and uplink communication to 1, 3-2, 3-1).
- the access point device 1-1 transmits the frame 12-21 on CH1 and the frame 12-22 on CH2 to the station device 2AX.
- the access point device 1-2 transmits frames 12-23 on CH3 to the station device 2BX.
- the access point device 1-3 transmits frames 12-24 on CH4 to the station device 2CX.
- the access point device 1-1 manages CH1 and CH2 and uses them in the sub wireless communication system 3-1 to use the access point.
- the device 1-2 manages CH3 and uses it in the sub-wireless communication system 3-2, and the access point device 1-3 manages CH4 and uses it in the sub-wireless communication system 3-3.
- the channel allocation method described in this paragraph is an example for explanation, and of course, other allocation methods are possible.
- the station device that has received the frames 12-21 to 12-24 transmits the response frames 12-31 to 12-35 to the access point device.
- the frames 12-21 to 12-24 also serve as a trigger frame for the station device to transmit the uplink data frame. Therefore, the frames 12-31 to 12-35 transmitted by the station device to the access point device may include uplink data in addition to the response to frames 12-21 to 12-24.
- the station device 2AX performs uplink communication with frames 12-31 and frames 12-32 on CH1 and CH2 managed by the access point device 1-1 and used in the sub-wireless communication system 3-1.
- the station device 2BX performs uplink communication by frames 12-33 on CH3 managed by the access point device 1-2 and used in the sub-wireless communication system 3-2.
- the station device 2BX connects CH4 managed by the access point device 1-3 to the station device 2CX in the sub wireless communication system 3-3 (the station device 2CX is connected to the access point device 1-3 (Association). Frames 12-35 can be transmitted in common with)).
- the station device 2CX shares CH4 managed by the access point device 1-3 with the station device 2BX in the sub wireless communication system 3-2 and performs uplink communication by frames 12-34.
- the sub-wireless communication system 3-1 exclusively uses CH1 and CH2.
- the sub-wireless communication system 3-2 may exclusively use CH3 and may share CH4 managed by the access point devices 1-3 constituting the sub-wireless communication system 3-3.
- the access point device 1-3 manages CH4, but the sub-wireless communication system 3-2 may be permitted to use CH4 and shared.
- the channel allocation method described in this paragraph is an example for explanation, and of course, other allocation methods are possible.
- a wireless communication system (3-2 in this example) is managed by an access point device (1-3 in this example) constituting another wireless communication system (3-3 in this example). By allowing the sharing of radio resources, it is possible to efficiently use the radio resources in the Multi-AP radio communication system.
- the trigger frames 12-11 to 12-14 notify each access point device that the radio resource managed by one access point device is shared with another access point device, and the notified radio is used. Downlink communication may be performed according to the resource allocation.
- the access point device that has received the frames 12-31 to 12-35 transmits the response frames 12-41 to 12-44 to the station device.
- Frames 12-41 to 12-44 transmitted by the access point device to the station device may include downlink data in addition to the response to frames 12-31 to 12-35.
- cascade frame exchange CSS frame exchange, Cascading sequence
- downlink data frame transmission / reception and uplink data transmission / reception are alternately repeated within one TXOP section.
- the access point device receives the uplink frame (12-31 to 12-35) after the downlink frame (12-21 to 12-24) is transmitted, and then the downlink frame (12-41).
- ⁇ 12-44 This is an example in which the uplink frame (12-51 to 12-55) is received after the transmission, and finally the response frame (11-61 to 11-64) is transmitted to end the transmission. That is, the combination of downlink frame transmission / reception and uplink frame transmission / reception is executed twice, but the execution of this combination is not limited to two times, and may be executed three or more times. Further, the channel allocation information notified to each access point device in the trigger frames 12-11 to 12-14 is valid until the end of all downlink frame transmission / reception and uplink frame transmission / reception within the total TXOP section.
- FIGS. 13 to 15 are resource division examples defined by IEEE802.11ax.
- the unit of resource division is the resource unit (RU) described above.
- RU resource unit
- FIG. 13 13-1 is a division example at 26RU, 13-2 is a division example at 52RU.
- 13-3 is an example of division at 106RU, 13-4 is an example of division at 242RU, 13-5 is an example of division at 484RU, 13-6 is an example of division at 996RU), the minimum is 26RU, and the maximum is It is 996RU.
- FIG. 14 When the wireless communication system is configured with a 40 MHz bandwidth, there are resource division examples such as 14-1 to 14-5 shown in FIG. 14 (14-1 is a division example at 26RU, 14-2 is a division example at 52RU).
- a division example, 14-3 is a division example at 106RU, 14-4 is a division example at 242RU, 14-5 is a division example at 484RU), the minimum is 26RU, and the maximum is 484RU.
- FIGS. 15-1 to 15-4 15-1 is a division example at 26RU, 15-2 is a division example at 52RU.
- the division example, 15-3 is a division example at 106RU, 15-4 is a division example at 242RU), the minimum is 26RU, and the maximum is 242RU.
- the access point device 1-1 constructs a sub-wireless communication system 3-1 having a bandwidth of 40 MHz (CH1 and CH2), and uses radio resources by resource division according to the example shown in FIG.
- the access point device 1-2 constructs a sub-wireless communication system 3-2 with a bandwidth of 20 MHz (CH3), and uses radio resources by resource division according to the example shown in FIG.
- the access point device 1-3 constructs a sub-wireless communication system 3-3 with a bandwidth of 20 MHz (CH4), and uses radio resources in resource division according to the example shown in FIG.
- the access point device can perform downlink communication for transmitting a frame to a plurality of station devices at the same time.
- each station device can perform uplink communication in which the frame is transmitted from a plurality of station devices at the same time.
- the access point device describes information (Resource Allocation Information) indicating the division status of the radio resource as common control information in the PHY header of the frame transmitted to the station device connected to the own device (association). can do. Further, the access point device transmits the information (Resource Unit Assignment Information) indicating the RU to be assigned to each station device as the unique control information to the station device connected to the own device (association), and the PHY of the frame. It can be described in the header.
- the access point device 1-2 manages the radio resource of CH3, and the access point device 1-3 manages the radio resource of CH4.
- An example of allocating the radio resource of CH4 managed by the access point device 1-3 to the sub-wireless communication system 3-2 configured by the access point device 1-2 will be described with reference to FIG.
- FIG. 16 the illustration of NULL SubCarriers is omitted, and the resource is divided into 52RU units and 26RU units as an example, but the resource division method is not limited to this example.
- CH3 is composed of RU16-11 to RU16-15
- CH4 is composed of RU16-16 to RU16-20.
- the sub-wireless communication system 3-2 may be assigned to permit continuous RU16-16 to RU16-17 among the radio resources of CH4 managed by the access point device 1-3. It may be assigned to permit the use of discrete RUs from CH4, such as the combination of RU16-16 and RU16-18.
- the radio resources provided from the access point devices 1-3 to the access point devices 1-2 are calculated by the Coordinator access point device 1-1 according to the requested radio resources of each access point constituting the Multi-AP radio system. Notify the access point device 1-2 in advance. Alternatively, the radio resources not used by the access point device 1-3 may be notified to the Coordinator access point device 1-1, and the Coordinator access point device 1-1 may notify the access point device 1-2 based on the notification.
- the resource division example 16-1 will be described as being selected. However, in the case of FIG. 13, it is specified from the resource division examples 13-1 to 13-6, and in the case of FIG. 14, the resource division is specified. There are various patterns in the resource division example, such as being specified from the examples 14-1 to 14-5, and being specified from the resource division examples 15-1 to 15-4 in FIG. be.
- the bandwidth shared by the sub-wireless communication system 3-2 and the sub-wireless communication system 3-3 is set to 40 MHz, but the bandwidth is not limited to this value and is provided by another access point device. It depends on the size of the wireless channel and frequency resources.
- unique control information 16-2 information related to each RU linked by a broken line arrow.
- the number of fields is 10, but it actually changes according to the resource allocation state specified by Resource Allocation Information.
- Information related to the station device identifier (Association ID, etc.), modulation method MCS (Modulation and Coding Scheme), beamforming, etc. is stored in each field.
- the station device specified by the identifier transmits / receives frames in the associated RU.
- the access point device 1-2 described the Resource Unit Assignment Information of only CH3 (20 MHz bandwidth) managed by its own device in the PHY header and transmitted it, but in this embodiment, in addition to CH3, it is transmitted.
- Resource Unit Assignment Information with a bandwidth of 40 MHz including CH4 managed by other access point devices 1-3 that provide wireless resources is described in the PHY header and transmitted.
- the resource unit assignment information of the unique control information targets only the station devices in the sub-wireless communication system 3-2 managed by the access point device 1-2, and the sub-wireless communication system managed by the access point device 1-3.
- empty information (NULL value, information indicating that it is not a target, association ID that does not exist, etc.) may be described. This will be specifically described with reference to FIG.
- the sub-wireless communication system 3-2 configured by the access point device 1-2 can use RU16-16 and RU16-18 included in CH4 in addition to CH3 (16-11 to 16-15).
- Field1 is information related to RU16-11
- field2 is information related to RU16-12
- field3 is information related to RU16-13
- field4 is information related to RU16-14
- field5 is information related to RU16-15.
- Field 6 describes information related to RU16-16
- field7 describes empty information
- field8 describes information related to RU16-18
- fields9 to field10 contain empty information (or field does not exist).
- FIG. 16 shows a two channel configuration of 20 MHz + 20 MHz to clearly show that the access point device 1-2 manages CH3 with a 20 MHz bandwidth and the access point device 1-3 manages CH4 with a 20 MHz bandwidth. It is illustrated that each channel has a DC subcarrier. However, if it is easier to handle with one channel configuration of 40 MHz in terms of mounting, a RU arrangement with one DC subcarrier as shown in FIG. 17 may be used, and CH3 is configured with RU17-11 to RU17-15. CH4 is configured from RU17-16 to RU17-20. Further, it will be described assuming that the resource division example 17-1 is selected.
- the sub-wireless communication system 3-2 and the sub-wireless communication system 3-3 are assigned RUs so that the RUs used do not overlap, but the frame handled by each sub-wireless communication system has a bandwidth of 40 MHz. ..
- each field is information related to each RU linked by a broken line arrow.
- Information related to the station device identifier (Association ID, etc.), modulation method MCS (Modulation and Coding Scheme), beamforming, etc. is stored in each field.
- the sub-wireless communication system 3-2 configured by the access point device 1-2 can use RU17-16 and RU17-18 included in CH4 in addition to CH3 (17-11 to 17-15).
- Field1 is information related to RU17-11
- field2 is information related to RU17-12
- field3 is information related to RU17-13
- field4 is information related to RU17-14
- field5 is information related to RU17-15.
- Field 6 describes information related to RU17-16
- field7 describes empty information
- field8 describes information related to RU17-18
- fields9 to field10 contain empty information (or field does not exist).
- the Association ID that distinguishes the station device by each access point device is taken as an example as the identifier described in each field of the Resource Unit Assignment Information of the unique control information.
- the association ID numbering space is not separated between the sub-wireless communication systems and is not independent, different sub-wireless communication systems may use the same Association ID and overlap. Therefore, the information related to the station device in the other wireless communication system described in the unique control information is left empty.
- This problem distinguishes all station devices located in the Multi-AP wireless communication system, apart from the Association ID used to distinguish all station devices located in the conventional sub-wireless communication system. This can be solved by providing a new possible identifier (Multi-AP Association ID). Therefore, when the Multi-APAssociation ID is used as the identifier described in each field of ResourceUnitAssignmentInformation of the unique control information, the information related to the station device in the other sub-wireless communication system should not be empty information. May be good.
- the access point device has its own control information, which is information indicating the RU assigned to each station device (Resource Unit Assignment Information), in addition to the information of the station device connected to the own device (association). Information on station devices that are not connected to the device (not associated) can also be described. This is because the Multi-AP Association ID does not overlap in the Multi-AP wireless system.
- the specific control information is divided into two.
- Resource division example 18-1 is selected, CH3 is composed of RU18-11 to RU18-15, and CH4 is composed of RU18-16 to RU18-20.
- the access point device 1-2 transmits the unique control information 18-2, which is the Resource Unit Assignment Information of CH3, by describing the PHY header.
- the access point device 1-3 transmits the unique control information 18-3, which is the Resource Unit Assignment Information of CH4, by describing the unique control information 18-3 in the PHY header.
- the access point device 1-3 has each of field 1 (information related to RU18-16 is stored) and field 3 (information related to RU18-18 is stored) of the specific control information 18-3.
- the Multi-AP Association ID of the station device connected to the access point device 1-2 is described in the identifier and transmitted.
- the station device connected to the access point device 1-2 receives the unique control information of the PHY header transmitted by the access point device 1-3 which is not the connection destination (not the association destination), and the value of the identifier is its own device. If it matches the identifier of (Multi-AP Association ID, etc.), it can be known that the radio resource managed by the access point device 1-3 has been assigned.
- the difference from FIG. 17 is that the specific control information is divided into two.
- the difference from FIG. 18 is the position of the DC subcarrier.
- Resource division example 19-1 is selected, CH3 is composed of RU19-11 to RU19-15, and CH4 is composed of RU19-16 to RU19-20.
- the access point device 1-2 transmits the unique control information 19-2, which is the Resource Unit Assignment Information of CH3, by describing the PHY header.
- the access point device 1-3 transmits the unique control information 19-3, which is the Resource Unit Assignment Information of CH4, by describing the unique control information 19-3 in the PHY header.
- the access point device 1-3 has each of field 1 (information related to RU 19-16 is stored) and field 3 (information related to RU 19-18 is stored) of the specific control information 19-3.
- the Multi-AP Association ID of the station device connected to the access point device 1-2 is described in the identifier and transmitted.
- the station device connected to the access point device 1-2 receives the unique control information of the PHY header transmitted by the access point device 1-3 which is not the connection destination (not the association destination), and the value of the identifier is its own device. If it matches the identifier of (Multi-AP Association ID, etc.), it can be known that the radio resource managed by the access point device 1-3 has been assigned.
- the Association ID, Multi-AP Association ID, etc. are set in the identifier of each field of Resource Unit Assignment Information, which is the unique control information, and the divided radio resources and RUs are divided into which stations. Specify whether to assign to the device.
- Resource Unit Assignment Information which is the unique control information
- the divided radio resources and RUs are divided into which stations. Specify whether to assign to the device.
- set a special value indicating that any station device can use the corresponding radio resource and RU, and set each station device. May use wireless resources, RU, on a contention basis.
- the communication device can perform communication in a frequency band (frequency spectrum) called an unlicensed band, which does not require a license from a country or region, but can be used. Frequency bands are not limited to this.
- the communication device is actually used for the purpose of preventing interference between frequencies, for example, even though the use permission for a specific service is given by the country or region.
- a frequency band called a non-white band for example, a frequency band assigned for television broadcasting but not used in some areas
- a shared spectrum shared frequency band
- the program that operates in the wireless communication device is a program that controls a CPU or the like (a program that causes a computer to function) so as to realize the functions of the above embodiment according to one aspect of the present invention.
- the information handled by these devices is temporarily stored in RAM at the time of processing, then stored in various ROMs and HDDs, and is read, corrected, and written by the CPU as needed.
- the recording medium for storing the program includes a semiconductor medium (for example, ROM, non-volatile memory card, etc.), an optical recording medium (for example, DVD, MO, MD, CD, BD, etc.), a magnetic recording medium (for example, magnetic tape, etc.). It may be any of flexible disks, etc.).
- a semiconductor medium for example, ROM, non-volatile memory card, etc.
- an optical recording medium for example, DVD, MO, MD, CD, BD, etc.
- a magnetic recording medium for example, magnetic tape, etc.
- the program can be stored and distributed in a portable recording medium, or transferred to a server computer connected via a network such as the Internet.
- the storage device of the server computer is also included in one aspect of the present invention.
- a part or all of the communication device in the above-described embodiment may be realized as an LSI which is typically an integrated circuit.
- Each functional block of the communication device may be individually chipped, or a part or all of them may be integrated into a chip.
- an integrated circuit control unit for controlling them is added.
- the method of making an integrated circuit is not limited to LSI, but may be realized by a dedicated circuit or a general-purpose processor. Further, when an integrated circuit technology that replaces an LSI appears due to advances in semiconductor technology, it is also possible to use an integrated circuit based on this technology.
- the invention of the present application is not limited to the above-described embodiment.
- the wireless communication device of the present invention is not limited to application to mobile station devices, and is a stationary or non-movable electronic device installed indoors or outdoors, for example, AV device, kitchen device, cleaning / washing. Needless to say, it can be applied to equipment, air conditioning equipment, office equipment, vending machines, and other household equipment.
- One aspect of the present invention is suitable for use in communication devices and communication methods.
- Wireless communication system 10001-1 Upper layer section 10002-1 Autonomous distributed control section 10002a-1 CCA section 10002b- 1 Back-off unit 10002c-1 Transmission judgment unit 1003-1 Transmission unit 10003a-1 Physical layer frame generation unit 10003b-1 Wireless transmission unit 1004-1 Receiver unit 1004000a-1 Wireless reception unit 1004000b-1 Signal demodulation unit 1005-1 Antenna Parts 11-11 to 11-14, 11-21 to 11-24, 11-31 to 11-34, 11-41 to 11-44, 11-51 to 11-54, 11-61 to 11-64 Frame 12 -11 to 12-14, 12-21 to 12-24, 12-31 to 12-35, 12-41 to 12-44, 12-51 to 12-55, 12-61 to 12-64 Frame 13-1 ⁇ 13-6 Resource division example 14-1 ⁇ 14-5 Resource division example 15-1 ⁇ 15-4 Resource division example 14-1 ⁇ 14-5 Resource division example 15-1 ⁇ 15-4 Resource division example 14-1 ⁇ 14-5 Resource division example 15-1 ⁇ 15-4 Resource division example 14-1 ⁇ 14-5 Resource division example 15-1 ⁇ 15-4 Resource
Abstract
Description
本願は、2020年9月2日に日本に出願された特願2020-147206号について優先権を主張し、その内容をここに援用する。
[1.第1の実施形態]
[2.全実施形態共通]
2-1、2-12、2-13、2-123、2-2、2-21、2-23、2-213、2-3、2-31、2-32、2-312 ステーション装置
3-1、3-2、3-3 (サブ)無線通信システム
10001-1 上位層部
10002-1 自律分散制御部
10002a-1 CCA部
10002b-1 バックオフ部
10002c-1 送信判断部
10003-1 送信部
10003a-1 物理層フレーム生成部
10003b-1 無線送信部
10004-1 受信部
10004a-1 無線受信部
10004b-1 信号復調部
10005-1 アンテナ部
11-11~11-14、11-21~11-24、11-31~11-34、11-41~11-44、11-51~11-54、11-61~11-64 フレーム
12-11~12-14、12-21~12-24、12-31~12-35、12-41~12-44、12-51~12-55、12-61~12-64 フレーム
13-1~13-6 リソース分割例
14-1~14-5 リソース分割例
15-1~15-4 リソース分割例
16-1 リソース分割例
16-2 固有制御情報
17-1 リソース分割例
17-2 固有制御情報
18-1 リソース分割例
18-2~18-3 固有制御情報
19-1 リソース分割例
19-2~19-3 固有制御情報
Claims (13)
- 第1の無線リソースを管理する第1のサブ無線通信システムと、第2の無線リソースを管理する第2のサブ無線通信システムから構成される無線通信システムにおいて、
前記第1のサブ無線通信システムに接続する端末装置であって、
前記第1の無線リソースに加えて第2の無線リソースでも通信することができる、
端末装置。 - 前記通信に使用する前記第2の無線リソースは、
前記第1のサブ無線通信システムにおける前記端末装置の識別子と紐付けられ、
前記第1のサブ無線通信システムの制御情報で通知される、
請求項1記載の端末装置。 - 前記通信に使用する前記第2の無線リソースは、
前記無線通信システムにおける前記端末装置の識別子と紐付けられ、
前記第2のサブ無線通信システムの制御情報で通知される、
請求項1記載の端末装置。 - 第1のサブ無線通信システムと第2のサブ無線通信システムから構成される無線通信システムにおいて、
前記第1のサブ無線通信システムに接続する端末装置であって、
ダウンリンク通信は、前記第1のサブ無線通信システムが管理する第1の無線リソースで実施し、
アップリンク通信は、前記第1の無線リソースに加えて、前記第2のサブ無線通信システムが管理する第2の無線リソースで実施することができる、
端末装置。 - 前記アップリンク通信に使用する前記第2の無線リソースは、前記第1のサブ無線通信システムにおける前記端末装置の識別子と紐付けられ、前記第1のサブ無線通信システムの制御情報で通知される、請求項4記載の端末装置。
- 前記アップリンク通信に使用する前記第2の無線リソースは、前記無線通信システムにおける前記端末装置の識別子と紐付けられ、前記第2のサブ無線通信システムの制御情報で通知される、請求項4記載の端末装置。
- 第1のサブ無線通信システムと第2のサブ無線通信システムから構成される無線通信システムにおいて、
前記第1のサブ無線通信システムに接続する端末装置であって、
アップリンク通信は、前記第1のサブ無線通信システムが管理する第1の無線リソースで実施し、
ダウンリンク通信は、前記第1の無線リソースに加えて、前記第2のサブ無線通信システムが管理する第2の無線リソースで実施することができる、
端末装置。 - 前記ダウンリンク通信に使用する前記第2の無線リソースは、前記第1のサブ無線通信システムにおける前記端末装置の識別子と紐付けられ、前記第1のサブ無線通信システムの制御情報で通知される、請求項7記載の端末装置。
- 前記ダウンリンク通信に使用する前記第2の無線リソースは、前記無線通信システムにおける前記端末装置の識別子と紐付けられ、前記第2のサブ無線通信システムの制御情報で通知される、請求項7記載の端末装置。
- 第1のサブ無線通信システムと第2のサブ無線通信システムから構成される無線通信システムであって、
前記第1のサブ無線通信システムに接続する端末装置の通信は、
前記第1のサブ無線通信システムが管理する第1の無線リソースに加えて、前記第2のサブ無線通信システムが管理する第2の無線リソースでも実施することができる、
無線通信システム。 - 前記端末装置の通信に使用する前記第2の無線リソースは、
前記第1のサブ無線通信システムにおける前記端末装置の識別子と紐付けられ、
前記第1のサブ無線通信システムの制御情報で通知される、
請求項10記載の無線通信システム。 - 前記端末装置の通信に使用する前記第2の無線リソースは、
前記無線通信システムにおける前記端末装置の識別子と紐付けられ、
前記第2のサブ無線通信システムの制御情報で通知される、
請求項10記載の無線通信システム。 - 前記端末装置の通信に使用する前記第2の無線リソースは、
コンテンションベースで使用することができる、
請求項10記載の無線通信システム。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/019,513 US20240040548A1 (en) | 2020-09-02 | 2021-08-31 | Wireless communication apparatus and wireless communication system |
JP2022546322A JPWO2022050246A1 (ja) | 2020-09-02 | 2021-08-31 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020147206 | 2020-09-02 | ||
JP2020-147206 | 2020-09-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022050246A1 true WO2022050246A1 (ja) | 2022-03-10 |
Family
ID=80492240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/031829 WO2022050246A1 (ja) | 2020-09-02 | 2021-08-31 | 無線通信装置および無線通信システム |
Country Status (3)
Country | Link |
---|---|
US (1) | US20240040548A1 (ja) |
JP (1) | JPWO2022050246A1 (ja) |
WO (1) | WO2022050246A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023276907A1 (ja) * | 2021-06-29 | 2023-01-05 | シャープ株式会社 | 通信装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20200076552A1 (en) * | 2018-09-04 | 2020-03-05 | Qualcomm Incorporated | Protocols for multi-access point coordinated multi-user transmissions |
WO2020097444A1 (en) * | 2018-11-08 | 2020-05-14 | Interdigital Patent Holdings, Inc. | Methods and apparatus for joint multi-ap transmission in wlans |
-
2021
- 2021-08-31 US US18/019,513 patent/US20240040548A1/en active Pending
- 2021-08-31 JP JP2022546322A patent/JPWO2022050246A1/ja active Pending
- 2021-08-31 WO PCT/JP2021/031829 patent/WO2022050246A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20200076552A1 (en) * | 2018-09-04 | 2020-03-05 | Qualcomm Incorporated | Protocols for multi-access point coordinated multi-user transmissions |
WO2020097444A1 (en) * | 2018-11-08 | 2020-05-14 | Interdigital Patent Holdings, Inc. | Methods and apparatus for joint multi-ap transmission in wlans |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023276907A1 (ja) * | 2021-06-29 | 2023-01-05 | シャープ株式会社 | 通信装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2022050246A1 (ja) | 2022-03-10 |
US20240040548A1 (en) | 2024-02-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2021246203A1 (ja) | 無線通信装置 | |
WO2021246250A1 (ja) | 無線通信装置 | |
WO2016143842A1 (ja) | 端末装置および通信方法 | |
WO2022131317A1 (ja) | ステーション装置およびアクセスポイント装置 | |
WO2022050246A1 (ja) | 無線通信装置および無線通信システム | |
US20180054803A1 (en) | Base station apparatus and terminal apparatus | |
WO2021241452A1 (ja) | 通信装置、通信方法 | |
WO2022118741A1 (ja) | 無線通信装置および無線通信方法 | |
WO2022102484A1 (ja) | 無線通信装置および無線通信システム | |
JP2022045361A (ja) | 基地局装置および通信方法 | |
WO2022019265A1 (ja) | ステーション装置、子アクセスポイント装置、及び親アクセスポイント装置 | |
WO2022004664A1 (ja) | 無線通信装置 | |
WO2022004667A1 (ja) | アクセスポイント装置、ステーション装置、及び通信方法 | |
WO2022210090A1 (ja) | アクセスポイント装置、ステーション装置および通信方法 | |
WO2022004668A1 (ja) | アクセスポイント装置、ステーション装置、及び通信方法 | |
WO2023152843A1 (ja) | 無線通信装置および無線通信方法 | |
WO2023054153A1 (ja) | アクセスポイント装置、及び通信方法 | |
WO2024070605A1 (ja) | 端末装置、基地局装置および通信方法 | |
EP4224977A1 (en) | Radio communication apparatus and radio communication method | |
WO2023033184A1 (ja) | 通信装置および通信方法 | |
US20240129226A1 (en) | Access point apparatus, station apparatus, and radio communication system | |
US20240040509A1 (en) | Radio communication apparatus, radio terminal apparatus, and radio communication method | |
US20240040515A1 (en) | Radio terminal apparatus and radio communication method | |
WO2021166944A1 (ja) | ステーション装置、通信方法 | |
JP2022152385A (ja) | 基地局装置、及び通信方法 |
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: 21864304 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022546322 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18019513 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: 21864304 Country of ref document: EP Kind code of ref document: A1 |