WO2022254791A1 - 無線通信装置、無線通信端末、および無線通信方法 - Google Patents
無線通信装置、無線通信端末、および無線通信方法 Download PDFInfo
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- 238000004891 communication Methods 0.000 title claims abstract description 212
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 198
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0247—Traffic management, e.g. flow control or congestion control based on conditions of the access network or the infrastructure network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0278—Traffic management, e.g. flow control or congestion control using buffer status reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
- H04W28/086—Load balancing or load distribution among access entities
- H04W28/0861—Load balancing or load distribution among access entities between base stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present technology relates to a wireless communication device, a wireless communication terminal, and a wireless communication method.
- the present invention relates to communication terminals and wireless communication methods.
- Multi-Link Operation is being considered as a method to meet high transmission speed requirements such as 8K transmission and xR (xReality).
- a “link” is a wireless transmission path that allows data transmission between two wireless communication devices.
- each link is divided, for example, in the frequency domain and selected from among multiple wireless transmission paths that are independent of each other.
- MLD Multi-link Device
- MLD is a logical entity containing two or more STAs and has only one SAP (service access point) to the upper layer.
- An MLD in which each STA included is an AP is called an AP MLD
- an MLD in which each STA included is a non-AP is called a non-AP MLD.
- MLD uses multiple links for transmission.
- due to factors such as the degree of frequency proximity between links there are cases where the transmission signal on one link leaks, causing strong interference with the reception signal on another link and degrading the communication quality.
- NSTR Nonsimultaneous transmit and receive
- STR Simultaneous transmit and receive
- AP MLD and non-AP MLD communicate using a certain link pair
- that link pair is STR link pair for AP MLD and NSTR link pair for non-AP MLD
- AP MLD defines STR AP MLD and non-AP MLD to be non-STR non-AP MLD.
- AP MLD is multiple links for non-STR non-AP MLD, and downlink PPDU (Physical.layer(PHY) Protocol Data Unit) format MAC (Medium Access Control) frame It describes the conventions for a Trigger frame that is sent to induce a certain UL (Up Link) PPDU.
- PPDU Physical.layer(PHY) Protocol Data Unit
- MAC Medium Access Control
- AP MLD transmits a Trigger frame on multiple links to non-STR non-AP MLD, and transmits UL (Up Link) PPDU, which is an uplink frame.
- UL Up Link
- This technology was developed in view of this situation, and enables UL MU communication with the desired number of terminals.
- a wireless communication device includes a wireless communication terminal, a communication unit that performs communication using a plurality of links, first information related to frame transmission on a first link, and a second link. and a communication control unit that causes a first trigger frame to be transmitted on the first link, the first trigger frame including second information relating to transmission of at least a portion of the frame in the .
- a wireless communication terminal communicates with a wireless communication device over a plurality of links, and includes first information related to frame transmission over the first link and frame transmission over the second link.
- a communication unit for receiving a first Trigger frame containing second information relating to transmission of at least part of the and a second Trigger frame containing third information relating to transmission of frames on the second link; and a communication control unit for transmitting a frame on the second link based on the second information and the third information.
- communication is performed with a wireless communication terminal using a plurality of links. and a first trigger frame including first information about transmission of the frame on the first link and second information about transmission of at least part of the frame on the second link, Sent with a link.
- communication is performed with a wireless communication device over a plurality of links, and first information about transmission of frames over the first link and at least transmission of frames over the second link are provided.
- a first Trigger frame containing second information regarding a portion of the transmission and a second Trigger frame containing third information regarding transmission of frames on the second link are received.
- a frame is then transmitted over the second link based on the second information and the third information.
- FIG. 10 is a diagram showing an example of a conventional sequence
- 1 is a block diagram showing a configuration example of a wireless communication device
- FIG. FIG. 4 is a diagram showing a configuration example of a Trigger Plus frame of the present technology
- FIG. 10 is a flowchart for explaining processing of AP MLD
- FIG. 10 is a flowchart for explaining non AP MLD processing
- FIG. 1 is a block diagram showing a configuration example of a wireless communication device
- FIG. It is a figure which shows the sequence example in 2nd Embodiment of this technique.
- FIG. 9 is a block diagram showing a configuration example of part of a communication unit in FIG. 8; It is a block diagram which shows the structural example of a computer.
- FIG. 1 is a diagram showing a configuration example of a wireless communication system according to an embodiment of the present technology.
- data is transmitted and received by wireless communication (MLO) using multiple links.
- MLO wireless communication
- each link is, for example, divided in the frequency domain and selected from among multiple wireless transmission paths that are independent of each other.
- Each link uses, for example, a channel selected from a plurality of channels included in one of frequency bands such as 2.4 GHz band, 5 GHz band, 6 GHz band, and 920 MHz band.
- MLD is a logical entity containing two or more STAs and has only one SAP to upper layers.
- the wireless communication system in FIG. 1 is composed of one AP MLD1 and three non-AP MLD1 to non-AP MLD3. non-AP MLD1 to non-AP MLD3 are connected to AP MLD1.
- the solid line connecting AP MLD1 and non-AP MLD1 to non-AP MLD3 represents link1 (first link), and the broken line connecting AP MLD1 and non-AP MLD1 to non-AP MLD3 is Represents link2 (second link).
- AP MLD1 is a wireless communication device that operates as a base station that supports MLO.
- AP MLD1 contains AP1-1 and AP1-2.
- AP1-1 is a logical entity that operates using link1.
- AP1-2 is a logical entity working with link2.
- Non-AP MLD1 to non-AP MLD3 are wireless communication devices that operate as MLO-compatible terminals.
- non-AP MLD1 includes non-AP STA1-1 and non-AP STA1-2.
- non-AP STA1-1 is a logical entity operating with link1.
- non-AP STA1-2 is a logical entity operating with link2.
- non-AP MLD2 includes non-AP STA2-1 and non-AP STA2-2.
- non-AP STA2-1 is a logical entity operating with link1.
- non-AP STA2-2 is a logical entity that operates using link2.
- non-AP MLD3 includes non-AP STA3-1 and non-AP STA3-2.
- non-AP STA3-1 is a logical entity operating with link1.
- non-AP STA3-2 is a logical entity operating with link2.
- AP1 communicates with non-AP STA1-1 to non-AP STA3-1 using link1.
- AP2 communicates with non-AP STA1-2 to non-AP STA3-2 using link2.
- Link1 and link2 may be two channels selected from the same frequency band or two channels selected from different frequency bands.
- the number of links used between AP MLD1 and non-AP MLD1 to non-AP MLD3 is not limited to two, and communication may be performed using three or more links. Also, the number of non-AP MLDs is not limited to three, and four or more non-AP MLDs may be connected to AP MLD1.
- MLD uses multiple links for transmission.
- transmission signals on one link may leak, and interference with received signals on other links may be strong, degrading communication quality.
- NSTR link pair a link pair that causes restrictions on simultaneous transmission and reception between links
- STR link pair a link pair that does not have restrictions on simultaneous transmission and reception of signals between links, such as the fact that leakage power between links does not affect communication quality
- AP MLD when AP MLD and non-AP MLD communicate using a certain link pair, that link pair is STR link pair for AP MLD and NSTR link pair for non-AP MLD. , then AP MLD is defined to be STR AP MLD and non-AP MLD to be non-STR non-AP MLD. Therefore, hereinafter, AP MLD shall be STR AP MLD, and non-AP MLD shall be non-STR non-AP MLD, even if there is no description of STR or non-STR.
- link1 and link2 are NSTR link pair
- link1 and link3 and link2 and link3 are Combinations of links such as STR link pair
- the operations described herein apply to operations on link1 and link2.
- the STR link pair link1 and link3 can be dynamically changed to the NSTR link pair by changing the transmission power, transmission band, or the like.
- the operations described herein also apply to the operations on link1 and link3.
- Non-Patent Literature 1 describes the arrangements for Triggers that are transmitted when AP MLD transmits DL PPDUs over multiple links to non-STR non-AP MLD.
- the DL PPDU is sent from non-STR non-AP MLD after SIFS (Short Inter Frame Space) from the end of transmission. If the PPDU requests an immediate response, the AP MLD sets the difference in the transmission end times of the DL PPDUs between links to within 8us and transmits the DL PPDU.
- SIFS Short Inter Frame Space
- the AP MLD transmits the DL PPDU with the difference in the transmission end time of the DL PPDU between the links within 4us.
- FIG. 2 is a diagram showing a sequence when AP MLD1 induces UL MU communication on link1 and link2 for non-AP MLD1 to non-AP MLD3, which are non-STRs, using Trigger frames.
- FIG. 2 shows an example in which non-AP MLD1 to non-AP MLD3, which are non-STR non-AP MLDs, are connected to AP MLD1, and communication is performed using link1 and link2, respectively. ing.
- the AP MLD should send Trigger (Trigger1, Trigger2) frames on both link1 and link2, as shown at time t1 and time t2.
- AP MLD1 acquires the transmission right for link1 at time t1, transmits Trigger1 frames to non-AP MLD1 to non-AP MLD3, and transmits link2 at time t2. acquire the rights and transmit Trigger2 frames to non-AP MLD1 and non-AP MLD2.
- AP MLD1 ends transmission of the Trigger1 frame and the Trigger2 frame at the same time.
- AP MLD1 attempts to acquire transmission rights independently on link1 and link2, so there may be a time lag between the transmission start times of the Trigger1 and Trigger2 frames. For example, if NAV (Network Allocation Vector: transmission prohibited period) is set due to transmission of another terminal on link2, or if there is a difference between the backoff counters set on link1 and link2, the Trigger2 frame The transmission start time may be much later than the transmission of Trigger1 frame.
- NAV Network Allocation Vector: transmission prohibited period
- the transmission end times of the Trigger1 frame and Trigger2 frame must be aligned. Therefore, when the transmission of the Trigger2 frame on link2 is delayed from the transmission of the Trigger1 frame on link1, as at time t3, there is a restriction on the time that the Trigger2 frame can be transmitted. Therefore, the number of User Info included in the Trigger2 frame is restricted, and the Trigger2 frame may not be transmitted to non-AP MLD3 as at time t2. In such a case, the desired number of users (terminals) cannot be multiplexed in UL MU communication on link2.
- non-AP MLD1 to non-AP MLD3 transmit TB (Trigger-based) PPDU to AP MLD1 on link1 at time t4 based on the Trigger1 frame.
- TB Trigger-based
- PPDU is a MAC frame in PPDU (PHY Protocol Data Unit) format to which a PHY preamble, PHY header, PE (Packet Extension), etc. are added, as described above.
- a PPDU is a frame containing at least one of data, management information, and control information.
- non-AP MLD1 to non-AP MLD3 end TB PPDU transmission on link1 and link2 at time t5.
- AP MLD1 transmits Multi-STA BlockAck frames to non-AP MLD1 to non-AP MLD3 on link1, and Multi-STA BlockAck frames to non-AP MLD1 and non-AP MLD2 on link2.
- -Send a STA BlockAck frame Note that the frame transmitted as a TB PPDU acknowledgment may be a BlockAck frame addressed to an individual address instead of a Multi-STA BlockAck frame.
- the transmission start time of the Trigger frame differs between links, the possible transmission time of the Trigger frame that is transmitted with a delay will be restricted, and multiplexing for the desired number of terminals may become difficult.
- a Trigger frame of link1 in communication over a plurality of links, includes information about transmission of at least part of a frame transmitted over link2 and is transmitted.
- FIG. 3 is a block diagram showing a configuration example of a wireless communication device to which the present technology is applied.
- the wireless communication device 11 shown in FIG. 3 is a wireless communication device that operates as an AP MLD or non-AP MLD.
- the wireless communication device 11 is composed of a communication section 31, a control section 32, a storage section 33, and antennas 41-1 and 41-2.
- Antennas 41-1 and 41-2 are collectively referred to as antenna 41 when there is no need to distinguish them.
- the communication unit 31 transmits and receives data.
- the communication unit 31 is configured to include amplifier units 51-1 and 51-2, radio interface units 52-1 and 52-2, and signal processing units 53-1 and 53-2. Also, the communication unit 31 is configured to include a data processing unit 54 , a communication control unit 55 , and a communication storage unit 56 .
- the amplifiers 51-1 and 51-2, the radio interface units 52-1 and 52-2, and the signal processors 53-1 and 53-2 are respectively the amplifier unit 51 and the radio interface units 53-1 and 53-2. These are collectively referred to as interface section 52 and signal processing section 53 .
- the amplifier unit 51 amplifies the analog signal supplied from the wireless interface unit 52 to a predetermined power during transmission, and outputs the analog signal with the amplified power to the antenna 41 .
- the amplifying unit 51 amplifies the analog signal supplied from the antenna 41 to a predetermined power during reception, and outputs the amplified analog signal to the radio interface unit 52 .
- a part of the function of the amplifier section 51 may be included in the wireless interface section 52 . Also, part of the functions of the amplification unit 51 may be a component outside the communication unit 31 .
- the radio interface unit 52 converts the transmission symbol stream from the signal processing unit 53 into an analog signal, performs filtering, up-conversion to a carrier frequency, and phase control, and transmits the phase-controlled analog signal to an amplifier unit. 51.
- the radio interface unit 52 performs phase control, down-conversion, and inverse filtering on the analog signal supplied from the amplifier unit 51, and converts the received symbol stream into a digital signal to the signal processing unit 53. Output.
- the signal processing unit 53 performs encoding, interleaving, modulation, etc. on the data unit supplied from the data processing unit 54, adds a physical header, and outputs the transmission symbol stream to each radio interface unit 52. do.
- the signal processing unit 53 analyzes the physical header of the received symbol stream supplied from each radio interface unit 52 at the time of reception, performs demodulation, deinterleaving, decoding, etc. on the received symbol stream, and generates data units.
- the generated data unit is output to the data processing section 54 .
- the data processing unit 54 is composed of individual data processing units 61-1 and 61-2 and a common data processing unit 62.
- the individual data processing units 61-1 and 61-2 are collectively referred to as the individual data processing unit 61 when there is no need to distinguish between them.
- the individual data processing unit 61 performs channel access operations based on carrier sense, addition of MAC headers and error detection codes to data to be transmitted, and concatenation processing of multiple data units.
- the individual data processing unit 61 performs processing for decoupling the MAC header of the received data unit, analysis and error detection, and retransmission request operation.
- the common data processing unit 62 performs sequence management of the data held in the communication storage unit 56 and the control information and management information received from the communication control unit 55 at the time of transmission.
- the common data processing unit 62 also performs encryption processing of control information and management information, etc., generates data units, and allocates the generated data units to the individual data processing units 61-1 and 61-2.
- the common data processing unit 62 performs analysis processing and reorder processing of the data unit when receiving.
- the antenna 41, the amplifier 51, the radio interface 52, the signal processor 53, and the individual data processor 61 are grouped together with the same branch number (hereinafter, also referred to as individual communication set) as surrounded by dashed lines. ).
- the individual communication set also includes an individual control unit 71, which will be described later, although it is not surrounded by a dashed line.
- the individual communication set indicates the AP. If the wireless communication device 11 is non-AP MLD, the dedicated communication set indicates non-AP STA.
- Each set becomes a component of the wireless communication device 11 and performs wireless communication on each link.
- the storage unit 33 may be included in each set.
- the operations of the individual data processing unit 61 and the common data processing unit 62 are not limited to the operations described above, and one of them may perform the operation of the other, for example.
- the individual data processing unit 61 may be defined such that all functions of the common data processing unit 62 are implemented for each individual communication set.
- each link used by each group may have a different frequency band.
- the signal processing unit 53 and the individual data processing unit 61 each have the same branch number, and each of them has one set, and these two sets or three or more sets are connected to one radio interface unit 52. may be
- the communication control section 55 controls the operation of each section of the communication section 31 and information transmission between the sections. Further, the communication control unit 55 performs control to transfer control information and management information to be notified to other wireless communication devices to the individual data processing unit 61 and the common data processing unit 62 .
- the communication control unit 55 has individual control units 71-1 and 71-2 that control each individual communication set, and a common data processing unit 62 and a common control unit 72 that implements control common to each individual communication set.
- the individual control units 71-1 and 71-2 are collectively referred to as the individual control unit 71 when there is no need to distinguish between them.
- the individual control unit 71 transmits information about UL communication induced in each link to other individual control units 71, and controls each unit so that it is included in the Trigger frame and transmitted. At this time, the control information may be transmitted via the common control section 72 .
- the communication storage unit 56 holds information used by the communication control unit 55.
- the communication storage unit 56 also holds data to be transmitted and data received.
- the control unit 32 is composed of a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), and the like.
- the control unit 32 executes programs stored in a ROM or the like, and controls the communication unit 31 and the communication control unit 55 . Also, the control unit 32 may perform part of the operation of the communication control unit 55 instead. Also, the communication control unit 55 and the control unit 32 may be configured as one block.
- the storage unit 33 holds information used by the communication unit 31 and the control unit 32. Moreover, the memory
- the storage unit 33 and the communication storage unit 56 may be configured as one block.
- the antenna 41, the amplifier unit 51, and the radio interface unit 52 each have the same branch number, and each group has the same branch number. good too. Also, the communication unit 31 is realized by one or more LSIs.
- the individual data processing unit 61 is also called Lower MAC.
- the common data processing unit 62 is also called Upper MAC or Higher MAC.
- a set of the individual data processing unit 61 and the common data processing unit 62 is also called an AP entity or a non-AP entity.
- the communication control unit 55 is also called an MLD (Multi-link Device) management entity.
- FIG. 4 is a diagram showing a configuration example in the MAC layer of the Trigger Plus frame of this technology.
- the Trigger Plus frame consists of Frame Control, Duration, RA (Receiving STA address), TA (Transmitting STA address), Common Info, User Info List, Padding, and FCS (Frame Check Sequence) fields.
- the Trigger Plus frame in FIG. 4 is a Trigger frame that includes other link transmission information, which is information regarding the transmission of frames on links other than the own link, in a conventional Trigger frame. Other link transmission information is included for each User corresponding to the User Info List field.
- the other link transmission information includes at least a link ID that identifies the other link, a channel and RU (Resource Unit) in the band used by the other link, the number of transmission streams (SS), and UL Length ( length of frames transmitted on other links).
- a link ID that identifies the other link
- a channel and RU Resource Unit
- SS number of transmission streams
- UL Length length of frames transmitted on other links
- the other link transmission information may include information such as transmission power, MCS (Modulation and Coding Scheme), and AID (Association ID).
- link transmission information includes FEC Coding Type (BCC or LDPC), information indicating whether to use DCM (Dual Carrier Modulation), MPDU (MAC Protocol Data Unit) MU (Multi User) Apacing factor (MDPU position information) may be included.
- FEC Coding Type BCC or LDPC
- DCM Double Carrier Modulation
- MPDU MAC Protocol Data Unit
- MU Multi User Apacing factor
- Other link transmission information includes TID Aggregation Limit (information on upper limit of aggregation of A-MDPU), Preferred AC (information on access category to be transmitted), and Trigger Type (Trigger frame and TB PPDU which is a frame induced by Trigger frame). (information on the type of
- Other link transmission information includes information such as More TF (whether Trigger frames can be transmitted on other links) and CS required (whether carrier sense is required before transmission of TB PPDU). good too.
- link transmission information includes GI (Guard Interval) and LTF type (information on GI and LTF types of TB PPDU), Number of LTF Symbols And Midamble Periodicity (information on the number of LTF symbols of TB PPDU and the period of midamble), etc. It may contain information.
- GI Guard Interval
- LTF type information on GI and LTF types of TB PPDU
- Number of LTF Symbols And Midamble Periodicity information on the number of LTF symbols of TB PPDU and the period of midamble
- the other link transmission information may include information such as UL STBC (information on TB PPDU encoding method), LDPC Extra Symbols segment (LDPC code information), AP Tx Power (AP transmission power information).
- UL STBC information on TB PPDU encoding method
- LDPC Extra Symbols segment LDPC code information
- AP Tx Power AP transmission power information
- link transmission information may include information such as Rre-FEC Padding Factor/PE Disambiguity (information on the length of Pre-FEC padding and PacketExtension fields) and UL Spatial Reuse (information on spatial reuse).
- Rre-FEC Padding Factor/PE Disambiguity information on the length of Pre-FEC padding and PacketExtension fields
- UL Spatial Reuse information on spatial reuse
- Other link transmission information includes information such as Doppler (information on whether to include Midamble), UL SIG-A Reserved (information on information to be included in the reserved part of the preamble), and information on PPDU format of TB PPDU. may be included.
- the Frame Control field contains information indicating that this frame is the Trigger frame.
- the Duration field contains information indicating the communication period covered by this frame.
- the RA field contains information indicating the destination device.
- the RA may indicate, for example, a device-specific MAC address.
- the TA field contains information indicating the source device.
- the TA may indicate, for example, a device-specific MAC address.
- the Common Info field contains information common to all users.
- Common Info includes at least the Trigger Type, Link Info Present, and Trigger Dependent Common Info subfields.
- the Trigger Type subfield contains the Trigger Type information described above. Note that the Trgger Type subfield may include information indicating that information related to transmission of TB PPDUs on other links is Trigger (Trigger Plus) of Type included in User Info, which will be described later.
- the Link Info Present subfield contains information indicating that information on the transmission of TB PPDUs on other links is included.
- the Trigger Dependent Common Info field contains common information about the Trigger.
- the User Info List field consists of User Info subfields that contain each user's information.
- a user represents a terminal such as a non-AP STA.
- the users include not only users of the link that transmits this frame, but also users of other links. That is, other link transmission information is stored for each User in this User Info subfield.
- the User Info subfield consists of at least the RU Allocation, Link ID, and Trigger Dependent User Info subfields.
- the RU Allocation subfield contains information on the in-band channels and RUs used by the corresponding user's link.
- the Link ID subfield contains the link identification information of the corresponding user.
- the Trigger Dependent User Info subfield contains the relevant user's information related to the Trigger.
- the FCS subfield contains an error detection code.
- FIG. 5 is a diagram illustrating a sequence example in the first embodiment of the present technology
- non-AP MLD1 to non-AP MLD3, which are non-STR non-AP MLDs are connected to AP MLD1.
- a case of communication using link2 is shown.
- AP MLD1 acquires the transmission right on link1.
- AP MLD1 generates a scheduled time to acquire the transmission right on link2 predicted from access delays collected in advance, and a trigger frame for inducing UL transmission of non-AP MLD1 to non-AP MLD3 on link1. Calculate the difference between the estimated transmission end times when the
- AP MLD1 determines that it cannot transmit a Trigger frame containing information for inducing all of non-AP MLD1 to non-AP MLD3 within the scheduled transmission end time. Then, AP MLD1, in addition to information on UL transmission of non-AP MLD1 to non-AP MLD3 on link1, provides information on UL transmission on link2 of at least one of non-AP MLD1 to non-AP MLD3, For example, a Trigger Plus (Trigger1 + link2 User Info) frame described in the User Info field is generated and transmitted at time t11. In the case of FIG. 5, for example, an example in which a Trigger Plus frame containing information about UL transmission on link2 of non-AP MLD3 is generated will be described.
- AP MLD1 acquires the transmission right on link2, and at time t12, information such as the length of the TB PPDU common to UL transmissions of non-AP MLD1 to non-AP MLD3 is sent to Trigger described in the Common Info field, for example. (Trigger2) Send frame. Note that the User Info field of the Trigger2 frame contains information on UL transmission of non-AP MLD1 and non-AP MLD2.
- AP MLD1 ends transmission of the Trigger Plus frame and Trigger2 frame at the same time.
- Non-AP MLD1 to non-AP MLD1 receive the Trigger Plus frame on link1 and the Trigger2 frame on link2.
- non-AP MLD1 to non-AP MLD3 transmit TB PPDU on link1 based on the information described in the Trigger Plus frame. Also, non-AP MLD1 and non-AP MLD2 transmit TB PPDU on link2 based on the information described in the Trigger2 frame. Non-AP MLD3 transmits TB PPDU on link2 based on the information described in the Trigger Plus frame and Trigger2 frame.
- AP MLD1 transmits a Multi-STA BlockAck frame to non-AP MLD1 to non-AP MLD3 on link1 at time t16. Also, AP MLD1 starts transmitting Multi-STA BlockAck frames to non-AP MLD1 to non-AP MLD3 on link2. At time t17, transmission of Multi-STA BlockAck frames on link1 and link2 ends.
- non-AP MLD1 to non-AP MLD3 In response to transmission of the Multi-STA BlockAck frame by AP MLD1, non-AP MLD1 to non-AP MLD3 start receiving Multi-STA BlockAck frames on link1 and link2 at time t16, and link1 starts receiving Multi-STA BlockAck frames on link1 and link2 at time t17. And reception of the Multi-STA BlockAck frame on link2 ends.
- FIG. 6 is a flowchart for explaining the processing of AP MLD1.
- step S11 the communication control unit 55 of AP MLD1 collects information on the communication environment of each link.
- Information about the communication environment of each link includes the average access delay (Average Access Delay), which is the average value of the time from when an attempt is made to acquire the transmission right to when the signal is actually transmitted, and the traffic held by the terminals under its control. , information on the Capability of subordinate terminals, and information on the random waiting time of APs for each link.
- Average Access Delay Average Access Delay
- the information about the traffic held by the terminals under its control is, for example, the Buffer Status Report.
- Information related to the Capability of terminals under its control includes information indicating whether the link pair in operation is a STR link or NSTR link, and the amount of interference between links.
- Information about the random latency of APs on each link includes the access category, contention window, and remaining backoff counter.
- the communication control unit 55 of AP MLD1 acquires the transmission right on link1.
- step S13 the communication control unit 55 of AP MLD1 determines whether or not the Trigger frame of link1 includes information regarding the transmission of TB PPDU of each user of link2.
- step S13 is carried out using at least one of the capability information and the information collected in advance in step S11.
- the determination in step S13 is made based on whether or not the acquisition time of the transmission right on link2 is equal to or longer than the first threshold after the Trigger frame is transmitted on link1. That is, if the acquisition time of the transmission right on link2 is equal to or longer than the first threshold, it is determined in step S13 that the Trigger frame of link1 includes information on transmission of the TB PPDU of each user of link2.
- the first threshold is, for example, aSlotTime(9us) ⁇ 3.
- step S13 the determination in step S13 is made based on whether the Average Access Delay of link2 is equal to or less than the second threshold. That is, if the Average Access Delay of link2 is equal to or less than the second threshold, it is determined in step S13 that the Trigger frame of link1 includes information regarding the transmission of the TB PPDU of each user of link2.
- the second threshold is, for example, 144us.
- step S13 the determination in step S13 is made based on whether or not the remaining backoff counter of link2 is equal to or less than the AverageAccessDelay of link2. That is, if the remaining backoff counter of link2 is equal to or less than the Average Access Delay of link2, it is determined in step S13 that the Trigger frame of link1 includes information regarding the transmission of TB PPDUs of each user of link2.
- step S13 If it is determined in step S13 that the Trigger frame of link1 includes the information on the transmission of the TB PPDU of each user of link2, the process proceeds to step S14.
- the Trigger frame of link1 may include, for example, information only for non-AP MLD3, or may include information for all users.
- step S14 the communication control unit 55 of AP MLD1 transmits a Trigger frame containing information regarding the transmission of TB PPDU of each user of link2 on link1.
- step S13 If it is determined in step S13 that the Trigger frame of link1 does not include information regarding the transmission of TB PPDUs of each user of link2, the process proceeds to step S15.
- step S15 the communication control unit 55 of AP MLD1 transmits on link1 a Trigger frame that does not contain information regarding the transmission of TB PPDUs of each user on link2.
- step S14 or S15 the process proceeds to step S16.
- step S16 the communication control unit 55 of AP MLD1 determines whether or not the transmission right has been acquired on link2 during transmission of the Trigger frame on link1. If it is determined in step S16 that the link2 has acquired the transmission right during transmission of the link1 trigger frame, the process proceeds to step S17.
- step S17 the communication control unit 55 of AP MLD1 transmits a Trigger frame on link2.
- the information about the device including the information in the Trigger Plus frame is also described in the Trigger frame of link2, and if the Trigger frame of link2 is acquired, the information due to the reception of the Trigger Plus frame can be set to be discarded. good.
- MCS Modulation and Coding Scheme: combinations of modulation schemes, coding rates, etc. Indexed
- step S17 the process ends.
- step S16 if it is determined in step S16 that link2 has not acquired the transmission right while link1 is transmitting the Trigger Plus frame, the process ends.
- FIG. 7 is a flowchart for explaining non-AP MLD processing.
- step S31 the communication control unit 55 of the non-AP MLD receives the Trigger frame of link1 on link1.
- step S32 the communication control unit 55 of the non-AP MLD receives the Trigger frame of link2 on link2.
- the received link1 Trigger frame contains information about the transmission of the link2 TB PPDU related to itself, and the received link2 Trigger frame also contains the link2 related Trigger frame. If information related to TB PPDU transmission is described, the link1 Trigger frame information may be discarded and only the link2 Trigger frame information may be retained.
- step S33 the non-AP MLD communication control unit 55 transmits the TB PPDU based on the information acquired from the link1 Trigger frame and the link2 Trigger frame.
- the information obtained from the Trigger frame of link1 and the Trigger frame of link2 is the same information as the other link transmission information described above with reference to FIG.
- the transmission of the TB PPDU in step S33 is stopped.
- step S33 the process ends.
- the Trigger frame of link1 includes information about the transmission of at least part of the frame of link2 and is transmitted. This enables UL MU communication with a desired number of terminals.
- Second Embodiment> In the first embodiment, if the transmission start times of the Trigger frames differ between links, the transmittable time of the Trigger frames that are transmitted with delay is restricted, making it difficult to multiplex frames for the desired number of terminals. Techniques for fear were shown.
- EMLMR mode allows multiple links to share RF chains (amplifiers, etc.) to dynamically switch the number of RF chains used in each link, and changes the maximum number of transmission/reception streams in each link (EMLMR mode). ).
- the switching operation of this RF chain has a certain amount of time due to device implementation restrictions such as the performance of the switch for switching the RF chain.
- an MLD that supports ELMMR mode may not be able to transmit TB PPDUs with the desired number of transmission streams after the SIFS time has passed since receiving the Trigger frame.
- This technology can also be applied to such MLDs that support ELMMR mode.
- FIG. 8 is a block diagram showing another configuration example of a wireless communication device to which the present technology is applied.
- the wireless communication device 11 shown in FIG. 8 is a wireless communication device that operates as an AP MLD or non-AP MLD and supports EMLMR mode.
- the wireless communication device 11 of FIG. 8 can dynamically switch which link uses the wireless interface unit 52, the amplifier unit 51, and the antenna 41, which are connected to the individual data processing unit 61 and the signal processing unit 53.
- the only difference is the possible points, and the other parts are common to the wireless communication device 11 of FIG.
- FIG. 9 is a diagram illustrating a sequence example in the second embodiment of the present technology.
- non-AP MLD1 to non-AP MLD3, which are non-STR non-AP MLDs are connected to AP MLD1.
- a case of communication using link2 is shown.
- non-AP MLD3 corresponds to EMLMR mode as shown in FIG.
- FIG. 10 is a diagram showing an example of RF-Chain switching operation of non-AP MLD3 in FIG.
- FIG. 10 shows part of the communication unit 31 of the non-AP MLD3, which is the wireless communication device 11 compatible with EMLMR mode.
- non-AP MLD3 has 1 Upper MAC, 2 Lower MACs, 2 PHY blocks, 2 RF chains (a combination of Tx chain and Rx-chain), and a Switch. 2, an MLD with two antennas. Of the two, the right side functions for link1 and the left side functions for link2.
- the upper MAC is the common data processing unit 62 in FIG. 8, the lower MAC is the individual data processing unit 61, and the PHY block is the signal processing unit 53.
- the antenna is antenna 41 .
- the RF chain corresponds to the amplifier section 51, and the interface portion between the PHY block and the RF chain is the radio interface section 52.
- FIG. 10A shows an example of a state in which the RF chains for link1 and link2 are functioning as Rx chains for each link.
- the signal of link1 received by the antenna for link1 is input to the PHY block for link1 via the switch for link1 and the Rx chain for link1.
- the link2 signal received by the link2 antenna is input to the link2 PHY block via the link2 switch and the link2 Rx chain.
- FIG. 10B shows a state in which the RF chain for link1 functions as the Tx chain for link2, and the RF chain for link2 functions as the Rx-chain for link2.
- the signal of link2 received by the antenna for link2 is input to the PHY block for link2 via the Switch for link2 and the Rx chain for link2, and the PHY block for link2
- the signal of link2 from is output from the antenna for link1 via the Tx chain for link1 and the switch for link1.
- FIG. 10C shows a state in which the RF chain for link1 functions as the Tx chain for link2, and the RF chain for link2 functions as the Tx chain for link2.
- the signal of link2 from the PHY block for link2 is output from the antenna for link1 via the Tx chain for link1 and the Switch for link1, and the Tx chain for link2 and output from the antenna for link2 via the Switch for link2.
- AP MLD1 acquires the transmission right on link1.
- AP MLD1 collects information on the communication environment of each link before obtaining the transmission right. That is, non-AP MLD1 to non-AP MLD3 transmit information about the communication environment of each link to AP MLD1.
- EMLSR Enhanced Multi-Link Single- Radio
- EMLMR mode and the chain switching delay time during EMLSR or EMLMR mode operation are additionally obtained in the case of FIG.
- information on the maximum number of transmission streams and the maximum number of reception streams on each link of EMLMR information on the EMLSR mode or the operating time in the EMLMR mode is additionally acquired as information on the Capability of the terminal under control.
- the information on the Capability of the terminal under control may include information on transmission/reception parameters such as bandwidth and MCS that are supported during operation in EMLMR mode or EMLSR mode.
- AP MLD1 determines the number of non-AP MLD3 transmission streams that support EMLMR mode based on the information about these EMLMRs that are obtained.
- MLDs that support EMLSR mode usually operate with only one link.
- CCA Carrier Channel assessment
- Some control frames are, for example, MU-RTS Trigger frames or BSRP (Buffer Status Report Poll) Trigger frames.
- an MLD that supports EMLSR mode When an MLD that supports EMLSR mode receives some of the above-mentioned control frames from the AP while operating in EMLSR mode, it can switch the RF chain, etc. so that transmission and reception can be performed on the received link.
- the second embodiment will be described using the EMLMR mode as an example, but the second embodiment of the present technology may also be applied to the EMLSR mode.
- AP MLD1 generates a scheduled time to acquire the transmission right on link2 predicted from access delays collected in advance, and a trigger frame for inducing UL transmission of non-AP MLD1 to non-AP MLD3 on link1. Calculate the difference between the estimated transmission end times when the
- AP MLD1 determines whether or not it is possible to transmit a Trigger frame containing information for inducing all of non-AP MLD1 to non-AP MLD3 within the scheduled transmission end time, to non-AP MLD3 2SS ( SS: number of transmission streams), and determine whether or not it is possible to secure time for non-AP MLD3 to switch RF chains.
- AP MLD1 in addition to information on UL transmission of non-AP MLD1 to non-AP MLD 3 on link1, non-AP MLD1
- a Trigger Plus (Trigger1 + link2 User Info) frame in which information about UL transmission on link2 of at least one of non-AP MLD3 is described in the User Info field is generated and transmitted at time t21.
- AP MLD1 transmits a Trigger Plus frame with 1SS so that non-AP MLD3 can receive it on link1.
- Non-AP MLD3 receives the Trigger Plus frame on link1 and acquires the information allocated for transmission on link2 and 2SS. At time t22, Non-AP MLD3 starts switching the Tx chain connected to the PHY block for link1 to the PHY block for link2 for transmission of link1.
- AP MLD1 acquires the transmission right on link2, and at time t23, sends a Trigger2 frame in which information such as the length of the TB PPDU common to UL transmissions of non-AP MLD1 to non-AP MLD3 is described in the Common Info field. Send.
- AP MLD1 finishes transmitting the Trigger Plus frame and Trigger2 frame at the same time.
- Non-AP MLD1 to non-AP MLD3 receive the Trigger Plus frame on link1 and the Trigger2 frame on link2.
- the Non-AP MLD3 After receiving the Trigger Plus frame and Trigger2 frame, the Non-AP MLD3 switches the RF chain connected with the antenna for link2 based on the Trigger Plus frame to the Tx chain connected to the PHY block for link2 from the Rx chain. Switch to chain. As a result, the state of the Tx chain of the Non-AP MLD3 is switched from A in FIG. 10 to B in FIG.
- Non-AP MLD3 switches the RF chain connected to the antenna for link1 from the Rx chain to the Tx chain connected to the PHY block for link1.
- non-AP MLD1 and non-AP MLD2 transmit TB PPDU on link1 based on the information described in the Trigger Plus frame. Also, non-AP MLD1 and non-AP MLD2 transmit TB PPDU on link2 based on the information described in the Trigger2 frame. At this time, non-AP MLD3 transmits TB PPDU in link2 and 2SS based on the information described in the Trigger Plus frame and Trigger2 frame.
- AP MLD1 transmits a Multi-STA BlockAck frame to non-AP MLD1 and non-AP MLD2 on link1 at time t28.
- link2 to non-AP MLD1 to non-AP MLD3.
- transmission of Multi-STA BlockAck frames on link1 and link2 ends.
- non-AP MLD1 and non-AP MLD2 In response to the transmission of the Multi-STA BlockAck frame by AP MLD1, non-AP MLD1 and non-AP MLD2 start receiving Multi-STA BlockAck frames on link1 at time t28, and start receiving Multi-STA BlockAck frames on link1 at time t29. Reception of the Multi-STA BlockAck frame ends.
- non-AP MLD1 to non-AP MLD3 In response to the transmission of the Multi-STA BlockAck frame by AP MLD1, non-AP MLD1 to non-AP MLD3 start receiving Multi-STA BlockAck frames on link2 at time t28, and start receiving Multi-STA BlockAck frames on link2 at time t29. Reception of the Multi-STA BlockAck frame ends.
- step S11 the following information is collected when information is collected in step S11, and determination is made in step S12 based on the following information. 6, the detailed description thereof will be omitted.
- step S11 of FIG. 6 in addition to the case of the first embodiment, information on EMLSR or EMLMR mode is collected as information on Capability of subordinate terminals.
- step S12 in FIG. This is done including based on whether there is a terminal that is
- the non-AP MLD processing in the second embodiment is the MLD processing corresponding to ELMMR mode. is the same as the processing of APMLD described above with reference to , so a detailed description thereof will be omitted.
- the Trigger Plus frame contains information about transmission of frames on link2 and 2SS. If so, the Tx chains of both links are switched to work on link2. Also, if the Trigger Plus frame contains information about frame transmission on link1 and 2SS, the Tx chains of both links are switched so that they can operate on link1.
- MLD corresponding to ELMMR mode is also transmitted with information related to the transmission of at least part of the frame on link2 included in the Trigger frame of link1 in communication over multiple links.
- RF chains can be switched, so UL MU communication can be performed with a desired number of terminals.
- the Trigger frame of link1 in communication over a plurality of links, includes information about transmission of at least part of the frame of link2 and is transmitted.
- a Trigger frame containing information on UL transmission of MLD frames of other links is also transmitted to MLDs that support EMLMR mode.
- Trigger frame which is a frame that requests a response in the SIFS period, can be induced on another link for terminals that support EMLMR mode, which takes longer than SIFS to switch the RF chain.
- RF chains can be switched, so UL MU communication can be performed with a desired number of terminals.
- FIG. 11 is a block diagram showing an example of the hardware configuration of a computer that executes the series of processes described above by a program.
- a CPU (Central Processing Unit) 301 , a ROM (Read Only Memory) 302 and a RAM (Random Access Memory) 303 are interconnected by a bus 304 .
- An input/output interface 305 is further connected to the bus 304 .
- the input/output interface 305 is connected to an input unit 306 such as a keyboard and a mouse, and an output unit 307 such as a display and a speaker.
- the input/output interface 305 is also connected to a storage unit 308 such as a hard disk or nonvolatile memory, a communication unit 309 such as a network interface, and a drive 310 that drives a removable medium 311 .
- the CPU 301 loads a program stored in the storage unit 308 into the RAM 303 via the input/output interface 305 and the bus 304 and executes the above-described series of processes. is done.
- the program executed by the CPU 301 is recorded on the removable media 311, or provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital broadcasting, and installed in the storage unit 308.
- the program executed by the computer may be a program that is processed in chronological order according to the order described in this specification, or may be executed in parallel or at a necessary timing such as when a call is made. It may be a program in which processing is performed.
- a system means a set of multiple components (devices, modules (parts), etc.), and it does not matter whether all the components are in the same housing. Therefore, a plurality of devices housed in separate housings and connected via a network, and a single device housing a plurality of modules in one housing, are both systems. .
- Embodiments of the present technology are not limited to the above-described embodiments, and various modifications are possible without departing from the gist of the present technology.
- this technology can take the configuration of cloud computing in which one function is shared by multiple devices via a network and processed jointly.
- each step described in the flowchart above can be executed by a single device, or can be shared by a plurality of devices.
- one step includes multiple processes
- the multiple processes included in the one step can be executed by one device or shared by multiple devices.
- This technique can also take the following configurations.
- a wireless communication terminal a communication unit that performs communication over a plurality of links, a first trigger frame including first information relating to transmission of a frame on a first link and second information relating to transmission of at least a portion of a frame on a second link;
- a wireless communication device comprising: a communication control unit for transmitting;
- the second information includes at least one of identification information for identifying the second link, transmission resource information, information on the length of transmitting frames, and information on the transmission stream. (1) or (2) ).
- the communication unit receives information about ELMMR (Enhanced Multi-Link Multi-Radio) transmitted from the wireless communication terminal, The wireless communication device according to (3), wherein, when the information on the transmission stream is included in the second information, the communication control unit determines the number of the transmission streams based on the information on the ELMMR. (5) The communication control unit determines whether or not to include the second information in the first Trigger frame before transmitting the first Trigger frame. Any one of (1) to (4) above. A wireless communication device as described. (6) The wireless communication device according to (5), wherein the communication control unit determines whether or not to include the second information in the first trigger frame, based on information about communication environment of each link.
- ELMMR Enhanced Multi-Link Multi-Radio
- the wireless communication device wherein the information about the communication environment of each link is a difference in random waiting time between the first link and the second link.
- the wireless communication device wherein the information regarding the communication environment of each link is an average access delay of the second link.
- the communication control unit transmits a second Trigger frame including third information regarding frame transmission on the second link on the second link so that the end time of the first Trigger frame is the same as that of the first Trigger frame.
- the wireless communication device according to any one of (1) to (8), which causes transmission.
- a wireless communication device Communicate with a wireless communication terminal using multiple links, causing a first trigger frame including first information about transmission of a frame on a first link and second information about transmission of a frame on a second link to be transmitted on the first link, wherein a first trigger frame is transmitted on the first link.
- (11) Communicating with a wireless communication device over a plurality of links and providing first information regarding transmission of frames over a first link and second information regarding transmission of at least a portion of frames over a second link a communication unit that receives a first Trigger frame containing the A wireless communication terminal comprising: a communication control unit that transmits a frame on the second link based on the second information and the third information.
- the second information includes at least one of identification information for identifying the second link, transmission resource information, information on length of transmitting frames, and information on a transmission stream. (11) or (12) ).
- the communication unit transmits information about ELMMR (Enhanced Multi-Link Multi-Radio) to the wireless communication device.
- the communication control unit selects the first link and the second link based on the information on the transmission stream determined by the wireless communication device that has received the information on the ELMMR (Enhanced Multi-Link Multi-Radio).
- the wireless communication terminal according to (13), wherein the number of transmission streams used in is changed, and frames are transmitted with the changed number of transmission streams on at least one of the first link and the second link.
- the wireless communication terminal Communicating with a wireless communication device over a plurality of links and providing first information regarding transmission of frames over a first link and second information regarding transmission of at least a portion of frames over a second link and a second Trigger frame containing third information regarding transmission of frames on the second link;
- a wireless communication method comprising: transmitting a frame on the second link based on the second information and the third information.
- 11 wireless communication device 31 communication unit, 41, 41-1, 41-2 antenna, 54 data processing unit, 51, 51-1, 51-2 amplification unit, 52, 52-1, 52-2 wireless interface unit, 53, 53-1, 53-2 signal processing unit, 55 communication control unit, 56 communication storage unit, 61, 61-1, 61-2 individual data processing unit, 62 common data processing unit, 71, 71-1, 71 -2 Separate control unit, 72 Common control unit
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Abstract
Description
1.システム構成
2.従来技術
3.第1の実施の形態
4.第2の実施の形態
5.その他
<無線通信システムの構成例>
図1は、本技術の実施の形態に係る無線通信システムの構成例を示す図である。
上述したように、MLDは、複数のリンクを用いて伝送を行う。しかしながら、MLDにおいては、リンク間の周波数の近接度合などの要因から、あるリンクでの送信信号が漏洩し、他のリンクでの受信信号に対する干渉が強く通信品質が劣化する場合がある。
図2は、AP MLD1が、non-STRであるnon-AP MLD1乃至non-AP MLD3に対して、link1とlink2でUL MU通信をTriggerフレームにて誘起する際のシーケンスを示す図である。
本技術においては、複数のlinkでの通信において、link1のTriggerフレームに、link2で送信されるフレームの少なくとも一部の送信に関する情報が含められて、送信される。
図3は、本技術を適用する無線通信装置の構成例を示すブロック図である。
図4は、本技術のTrigger PlusフレームのMAC層における構成例を示す図である。
図5は、本技術の第1の実施の形態におけるシーケンス例を示す図である。
図6は、AP MLD1の処理を説明するフローチャートである。
図7は、non-AP MLDの処理を説明するフローチャートである。
第1の実施の形態においては、リンク間でTriggerフレームの送信開始時間がずれる場合、遅れて送信されるTriggerフレームの送信可能時間が制約され、所望の端末数分のフレームの多重が困難になる恐れに対する技術が示されていた。
図8は、本技術を適用する無線通信装置の他の構成例を示すブロック図である。
図9は、本技術の第2の実施の形態におけるシーケンス例を示す図である。
<本技術の効果>
以上のように、本技術においては、複数のlinkでの通信において、link1のTriggerフレームに、link2でのフレームの少なくとも一部の送信に関する情報が含められて、送信される。
上述した一連の処理は、ハードウェアにより実行することもできるし、ソフトウェアにより実行することもできる。一連の処理をソフトウェアにより実行する場合には、そのソフトウェアを構成するプログラムが、専用のハードウェアに組み込まれているコンピュータ、または汎用のパーソナルコンピュータなどに、プログラム記録媒体からインストールされる。
本技術は、以下のような構成をとることもできる。
(1)
無線通信端末と、複数のリンクでの通信を行う通信部と、
第1のリンクでのフレームの送信に関する第1の情報と、第2のリンクでのフレームの少なくとも一部の送信に関する第2の情報とを含む第1のTriggerフレームを、前記第1のリンクで送信させる通信制御部と
を備える無線通信装置。
(2)
前記第2の情報は、前記第2のリンクでのフレームの少なくとも1の前記無線通信端末の送信に関する情報である
前記(1)に記載の無線通信装置。
(3)
前記第2の情報には、前記第2のリンクを識別する識別情報、送信リソース情報、フレームを送信する長さに関する情報、および送信ストリームに関する情報の少なくとも1つが含まれる
前記(1)または(2)に記載の無線通信装置。
(4)
前記通信部は、前記無線通信端末から送信されてくるEMLMR(Enhanced Multi-Link Multi-Radio)に関する情報を受信し、
前記通信制御部は、前記第2の情報に前記送信ストリームに関する情報を含める場合、前記EMLMRに関する情報に基づいて、前記送信ストリームの数を決定する
前記(3)に記載の無線通信装置。
(5)
前記通信制御部は、前記第1のTriggerフレームの送信前に、前記第1のTriggerフレーム内に前記第2の情報を含めるか否かを判定する
前記(1)乃至(4)のいずれかに記載の無線通信装置。
(6)
前記通信制御部は、各リンクの通信環境に関する情報に基づいて、前記第1のTriggerフレーム内に前記第2の情報を含めるか否かを判定する
前記(5)に記載の無線通信装置。
(7)
前記各リンクの通信環境に関する情報は、前記第1のリンクと前記第2のリンクのランダム待ち時間の差である
前記(6)に記載の無線通信装置。
(8)
前記各リンクの通信環境に関する情報は、前記第2のリンクの平均アクセス遅延である
前記(6)に記載の無線通信装置。
(9)
前記通信制御部は、前記第1のTriggerフレームと終了時間が揃うように、前記第2のリンクで、前記第2のリンクでのフレームの送信に関する第3の情報を含む第2のTriggerフレームを送信させる
前記(1)乃至(8)のいずれかに記載の無線通信装置。
(10)
無線通信装置が、
無線通信端末と、複数のリンクでの通信を行い、
第1のリンクでのフレームの送信に関する第1の情報と、第2のリンクでのフレームの送信に関する第2の情報を含む第1のTriggerフレームを、前記第1のリンクで送信させる
無線通信方法。
(11)
無線通信装置と、複数のリンクでの通信を行い、第1のリンクでのフレームの送信に関する第1の情報と、第2のリンクでのフレームの少なくとも一部の送信に関する第2の情報とを含む第1のTriggerフレームと、前記第2のリンクでのフレームの送信に関する第3の情報を含む第2のTriggerフレームとを受信する通信部と、
前記第2の情報および前記第3の情報に基づいて、前記第2のリンクでフレームを送信させる通信制御部と
を備える無線通信端末。
(12)
前記第2の情報は、前記第2のリンクでのフレームの少なくとも1の無線通信端末の送信に関する情報である
前記(11)に記載の無線通信端末。
(13)
前記第2の情報には、前記第2のリンクを識別する識別情報、送信リソース情報、フレームを送信する長さに関する情報、および送信ストリームに関する情報の少なくとも1つが含まれる
前記(11)または(12)に記載の無線通信端末。
(14)
前記通信部は、EMLMR(Enhanced Multi-Link Multi-Radio)に関する情報を前記無線通信装置に送信する
前記(13)に記載の無線通信端末。
(15)
前記通信制御部は、前記EMLMR(Enhanced Multi-Link Multi-Radio)に関する情報を受信した前記無線通信装置により決定された前記送信ストリームに関する情報に基づいて、前記第1のリンクおよび前記第2のリンクで使用する送信ストリーム数を変更し、前記第1のリンクおよび前記第2のリンクの少なくともどちらか一方で、変更した送信ストリーム数でフレームを送信させる
前記(13)に記載の無線通信端末。
(16)
無線通信端末が、
無線通信装置と、複数のリンクでの通信を行い、第1のリンクでのフレームの送信に関する第1の情報と、第2のリンクでのフレームの少なくとも一部の送信に関する第2の情報とを含む第1のTriggerフレームと、前記第2のリンクでのフレームの送信に関する第3の情報を含む第2のTriggerフレームとを受信し、
前記第2の情報および前記第3の情報に基づいて、前記第2のリンクで、フレームを送信させる
無線通信方法。
Claims (16)
- 無線通信端末と、複数のリンクでの通信を行う通信部と、
第1のリンクでのフレームの送信に関する第1の情報と、第2のリンクでのフレームの少なくとも一部の送信に関する第2の情報とを含む第1のTriggerフレームを、前記第1のリンクで送信させる通信制御部と
を備える無線通信装置。 - 前記第2の情報は、前記第2のリンクでのフレームの少なくとも1の前記無線通信端末の送信に関する情報である
請求項1に記載の無線通信装置。 - 前記第2の情報には、前記第2のリンクを識別する識別情報、送信リソース情報、フレームを送信する長さに関する情報、および送信ストリームに関する情報の少なくとも1つが含まれる
請求項2に記載の無線通信装置。 - 前記通信部は、前記無線通信端末から送信されてくるEMLMR(Enhanced Multi-Link Multi-Radio)に関する情報を受信し、
前記通信制御部は、前記第2の情報に前記送信ストリームに関する情報を含める場合、前記EMLMRに関する情報に基づいて、前記送信ストリームの数を決定する
請求項3に記載の無線通信装置。 - 前記通信制御部は、前記第1のTriggerフレームの送信前に、前記第1のTriggerフレーム内に前記第2の情報を含めるか否かを判定する
請求項1に記載の無線通信装置。 - 前記通信制御部は、各リンクの通信環境に関する情報に基づいて、前記第1のTriggerフレーム内に前記第2の情報を含めるか否かを判定する
請求項5に記載の無線通信装置。 - 前記各リンクの通信環境に関する情報は、前記第1のリンクと前記第2のリンクのランダム待ち時間の差である
請求項6に記載の無線通信装置。 - 前記各リンクの通信環境に関する情報は、前記第2のリンクの平均アクセス遅延である
請求項6に記載の無線通信装置。 - 前記通信制御部は、前記第1のTriggerフレームと終了時間が揃うように、前記第2のリンクで、前記第2のリンクでのフレームの送信に関する第3の情報を含む第2のTriggerフレームを送信させる
請求項1に記載の無線通信装置。 - 無線通信装置が、
無線通信端末と、複数のリンクでの通信を行い、
第1のリンクでのフレームの送信に関する第1の情報と、第2のリンクでのフレームの送信に関する第2の情報を含む第1のTriggerフレームを、前記第1のリンクで送信させる
無線通信方法。 - 無線通信装置と、複数のリンクでの通信を行い、第1のリンクでのフレームの送信に関する第1の情報と、第2のリンクでのフレームの少なくとも一部の送信に関する第2の情報とを含む第1のTriggerフレームと、前記第2のリンクでのフレームの送信に関する第3の情報を含む第2のTriggerフレームとを受信する通信部と、
前記第2の情報および前記第3の情報に基づいて、前記第2のリンクでフレームを送信させる通信制御部と
を備える無線通信端末。 - 前記第2の情報は、前記第2のリンクでのフレームの少なくとも1の無線通信端末の送信に関する情報である
請求項11に記載の無線通信端末。 - 前記第2の情報には、前記第2のリンクを識別する識別情報、送信リソース情報、フレームを送信する長さに関する情報、および送信ストリームに関する情報の少なくとも1つが含まれる
請求項12に記載の無線通信端末。 - 前記通信部は、EMLMR(Enhanced Multi-Link Multi-Radio)に関する情報を前記無線通信装置に送信する
請求項13に記載の無線通信端末。 - 前記通信制御部は、前記EMLMR(Enhanced Multi-Link Multi-Radio)に関する情報を受信した前記無線通信装置により決定された前記送信ストリームに関する情報に基づいて、前記第1のリンクおよび前記第2のリンクで使用する送信ストリーム数を変更し、前記第1のリンクおよび前記第2のリンクの少なくともどちらか一方で、変更した送信ストリーム数でフレームを送信させる
請求項13に記載の無線通信端末。 - 無線通信端末が、
無線通信装置と、複数のリンクでの通信を行い、第1のリンクでのフレームの送信に関する第1の情報と、第2のリンクでのフレームの少なくとも一部の送信に関する第2の情報とを含む第1のTriggerフレームと、前記第2のリンクでのフレームの送信に関する第3の情報を含む第2のTriggerフレームとを受信し、
前記第2の情報および前記第3の情報に基づいて、前記第2のリンクで、フレームを送信させる
無線通信方法。
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MINYOUNG PARK (INTEL CORP.): "multi-link power save - link bitmap", IEEE DRAFT; 11-20-0085-01-00BE-MULTI-LINK-POWER-SAVE-LINK-BITMAP, IEEE-SA MENTOR, PISCATAWAY, NJ USA, vol. 802.11 EHT; 802.11be, no. 1, 21 April 2020 (2020-04-21), Piscataway, NJ USA , pages 1 - 10, XP068167559 * |
YONGHO SEOKJAMES YEEJIANHAN LIUTHOMAS PARE: "Multi-link Triggered Uplink Access Follow Up", IEEE 802.11-20/0671R3, 29 July 2020 (2020-07-29), Retrieved from the Internet <URL:https://mentor.ieee.org/802.11/dcn/20/11-20-0671-03-00be-multi-link-triggered-uplink-access-follow-up.pptx> |
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