WO2023024123A1 - 多链路通信方法、装置、设备及介质 - Google Patents

多链路通信方法、装置、设备及介质 Download PDF

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Publication number
WO2023024123A1
WO2023024123A1 PCT/CN2021/115173 CN2021115173W WO2023024123A1 WO 2023024123 A1 WO2023024123 A1 WO 2023024123A1 CN 2021115173 W CN2021115173 W CN 2021115173W WO 2023024123 A1 WO2023024123 A1 WO 2023024123A1
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WIPO (PCT)
Prior art keywords
links
channel
link
value
time slot
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PCT/CN2021/115173
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English (en)
French (fr)
Inventor
徐彦超
王泷
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Oppo广东移动通信有限公司
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Priority to PCT/CN2021/115173 priority Critical patent/WO2023024123A1/zh
Priority to CN202180099118.2A priority patent/CN117480856A/zh
Publication of WO2023024123A1 publication Critical patent/WO2023024123A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a multi-link communication method, device, device, and medium.
  • IEEE Institute of Electrical and Electronics Engineers, Institute of Electrical and Electronics Engineers 802.11be
  • a function that can support multiple links is defined.
  • multiple links are established between the station (Station, STA) multi-link device (Multi-Link Device, MLD) and the access point (Access Point, AP) MLD, and the STA MLD And AP MLD can take advantage of multi-links to send and receive data on multiple links to achieve high throughput, low latency and other advantages.
  • a NSTR Non-simultaneous Transmission and Reception, not capable of sending and receiving at the same time
  • STA MLD device that supports IEEE 802.11be
  • RF Radio Frequency
  • Embodiments of the present application provide a multi-link communication method, device, equipment, and medium. Described technical scheme is as follows:
  • a multi-link communication method is provided, the method is executed by a station multi-link device or an access point multi-link device, and the multi-link includes: the station multi-link at least two links between a road device and an access point multi-link device, the method comprising:
  • the at least two links access the channel at the same time.
  • a multi-link communication apparatus where the multi-link includes: at least two links between the station multi-link device and the access point multi-link device,
  • the devices include:
  • a monitoring module configured to monitor the first attribute values of the at least two links, and/or, the channel status of the at least two links;
  • An access module configured to simultaneously access the at least two links when the first attribute values of the at least two links and/or the channel states of the at least two links meet the first condition channel.
  • a multi-link device includes a processor
  • the processor is configured to monitor the first attribute values of the at least two links, and/or, the channel status of the at least two links;
  • the processor is configured to, when the first attribute values of the at least two links and/or the channel states of the at least two links satisfy a first condition, simultaneously connect the at least two links to into the channel.
  • the processor includes: an application specific integrated circuit (Application Specific Integrated Circuit, ASIC).
  • ASIC Application Specific Integrated Circuit
  • a computer-readable storage medium where a computer program is stored in the storage medium, and the computer program is used for execution by a processor, so as to implement the foregoing multi-link communication method.
  • a chip is provided, the chip includes a programmable logic circuit and/or program instructions, and when the chip is running, is used to implement the above multi-link communication method.
  • a computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and a processor reads from the The computer-readable storage medium reads and executes the computer instructions, so as to implement the above-mentioned multi-link communication method.
  • STA MLD or AP MLD uses EDCA (Enhanced Distributed Channel Access, Enhanced Distributed Channel Access, Enhanced Distributed Channel Access, Enhanced Distributed Channel Access, Enhanced Distributed Channel Access) backoff (backoff) mechanism to access the channel, it monitors multiple links respectively, and records each link according to the monitoring results
  • EDCA Enhanced Distributed Channel Access, Enhanced Distributed Channel Access, Enhanced Distributed Channel Access, Enhanced Distributed Channel Access
  • backoff backoff
  • FIG. 1 is a schematic diagram of a wireless local area network provided by an embodiment of the present application
  • FIG. 2 is a schematic diagram of establishing a multi-link between a station MLD and an access point MLD provided by an embodiment of the present application;
  • FIG. 3 is a schematic diagram of multi-link communication provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of multi-link communication provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of multi-link communication provided by an embodiment of the present application.
  • FIG. 6 is a flowchart of a multi-link communication method provided by an embodiment of the present application.
  • FIG. 7 is a flowchart of a multi-link communication method provided by an embodiment of the present application.
  • FIG. 8 is a flowchart of a multi-link communication method provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of multi-link communication provided by an embodiment of the present application.
  • FIG. 10 is a flowchart of a multi-link communication method provided by an embodiment of the present application.
  • FIG. 11 is a schematic diagram of multi-link communication provided by an embodiment of the present application.
  • FIG. 12 is a schematic diagram of multi-link communication provided by an embodiment of the present application.
  • Fig. 13 is a schematic diagram of multi-link communication provided by an embodiment of the present application.
  • FIG. 14 is a schematic diagram of multi-link communication provided by an embodiment of the present application.
  • FIG. 15 is a schematic diagram of multi-link communication provided by an embodiment of the present application.
  • FIG. 16 is a schematic diagram of multi-link communication provided by an embodiment of the present application.
  • Fig. 17 is a schematic diagram of multi-link communication provided by an embodiment of the present application.
  • FIG. 18 is a schematic diagram of multi-link communication provided by an embodiment of the present application.
  • FIG. 19 is a schematic diagram of multi-link communication provided by an embodiment of the present application.
  • FIG. 20 is a schematic diagram of multi-link communication provided by an embodiment of the present application.
  • Fig. 21 is a schematic diagram of multi-link communication provided by an embodiment of the present application.
  • Fig. 22 is a block diagram of a multi-link communication device provided by an embodiment of the present application.
  • Fig. 23 is a schematic structural diagram of a multi-link device provided by an embodiment of the present application.
  • the network architecture and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application.
  • the evolution of the technology and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.
  • FIG. 1 shows a block diagram of a wireless local area network provided by an exemplary embodiment of the present application.
  • the wireless local area network may include: a station (STA) MLD10 and an access point (AP) MLD 20.
  • STA station
  • AP access point
  • the access point MLD 20 is a device deployed in a wireless local area network to provide wireless communication functions for the station MLD 10.
  • the station MLD10 may include: user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, wireless communication device, user agent or user device.
  • User Equipment User Equipment
  • the station MLD 10 can also be a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a Wireless Local Loop (Wireless Local Loop, WLL) station, a Personal Digital Assistant (PDA) , a handheld device with a wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, or a wearable device, which is not limited in this embodiment of the present application.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • both the station MLD 10 and the access point MLD 20 support the IEEE 802.11 standard.
  • IEEE 802.11be a function that can support IEEE 802.11 multilink is defined. According to the definition of both ends of communication in IEEE 802.11, one is the station MLD, and the other is the access point MLD.
  • the station MLD and the access point MLD that have established multi-links can take advantage of the multi-links to send and receive data on multiple links, so as to achieve advantages such as high throughput/low delay.
  • NSTR Non-simultaneous Transmission and Reception, which cannot be sent and received at the same time STA MLD that supports 802.11be
  • NSTR STA MLD Non-simultaneous Transmission and Reception, which cannot be sent and received at the same time STA MLD that supports 802.11be
  • NSTR STA MLD of Multiple Links due to the limitation of radio frequency, when one link is doing transmission, it will cause in-device interference in the device, and the other link cannot do it.
  • Normal reception (reception) makes it impossible to transmit and receive data independently and simultaneously on multiple links, that is, if this NSTR STA MLD wants to use multiple links at the same time, it needs to send or receive simultaneously on multiple links.
  • NSTR STA MLD Down Link, uplink
  • the transmission of NSTR STA MLD on the two links is aligned (Align) together, and the reception is also aligned (align) together .
  • NSTR STA MLD sends UL PPDU on link1/STA1 and link2/STA2 at the same time, and simultaneously receives BA (Block Acknowledgment) sent by AP MLD on link1/AP1 and link2/AP2.
  • EDCA channel access
  • CSMA/CA Carrier Sense Multiple Access with Collision Avoidance, Carrier Sense Multiple Access/Collision Avoidance
  • AC access code
  • NSTR STA MLD when NSTR STA MLD is sent on NSTR links at the same time, it is required that the Start Time (start time) of the UL PPDU should be aligned, and because each link in NSTR links is independently channeled to EDCA, This means that NSTR STA MLD must reduce the EDCA backoff slot count of all NSTR Links to 0 on NSTR links before allowing channel access on any link.
  • Mechanism 1 In NSTR STA MLD, after EDCA backoff is completed on any link, check whether the EDCA backoff process has been completed on another link. If EDCA backoff has not been completed on another link, the current link will re-perform the EDCA backoff process. Until the EDCA bakcoff on the two links is completed at the same time.
  • STA2 has completed the EDCA backoff process, but STA1 is still performing the EDCA backoff process, so STA2 needs to perform the EDCA backoff process again until STA1/STA2 on the two links complete the EDCA backoff process at the same time.
  • Mechanism 2 In NSTR STA MLD, after EDCA backoff is completed on any link, check whether the EDCA backoff process has been completed on another link. If EDCA backoff has not been completed on another link, the current link will continue to hold its The backoff slot count is 0 until the EDCA backoff process is completed on the other link, that is, the backoff slot count is also 0. At this time, NSTR STA MLD sends PPDUs on the two links at the same time.
  • STA1 has completed the EDCA backoff process, but STA2 is still in the EDCA backoff process, so STA1 keeps the backoff slot count at 0 until the backoff slot count of STA2 is 0, and NSTR STA MLD is on the two links Send PPDU at the same time.
  • the probability that the independent EDCA backoff processes on the two links will be completed at the same time will be very small.
  • mechanism 2 compared with mechanism 1, the advantage is that the backoff slot count on a certain link will be kept at 0, but there is still a defect that once the channel is detected to be busy on the current link, the current link still needs to go through the EDCA backoff process again.
  • STA1 has completed the EDCA backoff process, but STA2 is still in the EDCA backoff process, so STA1 keeps the backoff slot count at 0 and continues to listen, while the backoff slot count of STA2 is 2.
  • STA1 When STA1 detects that the channel is busy, STA1 needs to perform the EDCA backoff process again until the backoff slot count of STA2 and STA1 is 0 at the same time, and NSTR STA MLD sends PPDUs on the two links at the same time. In this way, the probability that the backoff slot count is 0 on the two links at the same time will decrease.
  • the present application provides the following methods to solve the shortcomings of the above-mentioned mechanism 1 and mechanism 2:
  • NSTR STA MLD uses two NSTR Links at the same time, and the EDCA backoff process is still performed independently on each link; when the backoff slot count on a link is reduced to 1, check the backoff status on the other link.
  • the two links will reduce the remaining backoff slot count to 0 at the same time, and then the two links can simultaneously access channel;
  • FIG. 6 shows a flowchart of a multi-link communication method provided by an embodiment of the present application.
  • the method can be applied to any MLD as a sending end in the communication system shown in FIG. 1 , and the MLD is a station MLD or an access point MLD.
  • the method may include the steps of:
  • Step 510 Monitor first attribute values of at least two links, and/or, channel states of at least two links.
  • the multi-link includes: at least two links between the station multi-link device and the access point multi-link device.
  • the at least two links may be all or part of the links between the station multi-link device and the access point multi-link device.
  • the first attribute value includes a backoff time slot value.
  • each link corresponds to a first attribute value
  • x links correspond to x first attribute values.
  • Each link corresponds to a channel, and the channel corresponding to the link is monitored through each link to obtain the channel status.
  • Channel status includes idle and busy.
  • Step 520 In a case where the first attribute values of the at least two links and/or the channel states of the at least two links satisfy the first condition, at least two links access the channel at the same time.
  • At least two links access the channel at the same time.
  • the first attribute values of at least two links are 1, and the channel states of at least two links are idle in the next backoff time slot, set the first attribute values of at least two links to After decreasing to 0, at least two links access the channel at the same time.
  • the at least one link is maintained
  • the first attribute value of the other link is a preset value.
  • the synchronization is based on the channel status of at least two links being idle, and the first attribute value of at least two links Subtract 1 synchronously.
  • an exemplary embodiment is given in which the first attribute values of at least two links and/or the channel states of at least two links satisfy the first condition.
  • FIG. 7 shows a flowchart of a multi-link communication method provided by an embodiment of the present application.
  • the method can be applied to any MLD as a sending end in the communication system shown in FIG. 1 , and the MLD is a station MLD or an access point MLD.
  • the method may include the steps of:
  • Step 510 Monitor first attribute values of at least two links, and/or, channel states of at least two links.
  • Step 521 In the case where the first attribute values of some links in the at least two links reach the preset value, and the first attribute values of the other links in the at least two links do not reach the preset value, keep some links The default value of the first attribute value of the road remains unchanged.
  • Some links can be one link or multiple links.
  • Other links are links other than some of the at least two links.
  • Other links can be one link or multiple links.
  • the preset values of the plurality of first attribute values corresponding to the plurality of links are kept unchanged.
  • the first attribute value of some links may be kept unchanged from the preset value:
  • the preset values of the first attribute values of some links are kept unchanged, and the channel states of other links are continuously monitored.
  • Step 522 When the first attribute values of the at least two links both reach the preset value, and the channel states of the at least two links are both idle, at least two links access the channel at the same time.
  • the first attribute values of at least two links are synchronously reduced by 1: After the first attribute values of at least two links are both 0, at least two links access the channel at the same time.
  • the at least two links After the at least two links reach the preset value, if the channel state of at least one of the at least two links is busy, keep the first attribute values of the at least two links unchanged.
  • the channel status of at least one link among at least two links is busy includes the following three situations:
  • At least two links access the channel at the same time, including the following two situations:
  • the 0th backoff time slot is a backoff time slot corresponding to the first attribute value of at least two links being 0.
  • the first attribute value as the backoff time slot value, and the attribute value detection status can also be referred to as The backoff slot value detection state is taken as an example for description.
  • the first link may be any one of the above at least two links
  • the second link may be any one of the above at least two links different from the first link.
  • the first link may also refer to multiple links in the above-mentioned at least two links
  • the second link may also refer to multiple links in the above-mentioned at least two links that are different from the first link. links.
  • FIG. 8 shows a flowchart of a multi-link communication method provided by an embodiment of the present application.
  • the method can be applied to any MLD as a sending end in the communication system shown in FIG. 1 , and the MLD is a station MLD or an access point MLD.
  • the method may include the steps of:
  • Step 310 Carry out the EDCA backoff process on the first link and the second link, listen to the first channel through the first link, and record the first backoff time slot value according to the listening result of the first channel; The road detects the second channel, and records the second backoff time slot value according to the detection result of the second channel.
  • the multi-link communication method provided in the embodiment of the present application is applied in a multi-link scenario, and the links in the multi-link scenario include: a first link and a second link between the station MLD and the access point MLD.
  • EDCA backoff includes two states (backoff states): IFS slot checking state and backoff slot value detection state.
  • the link that performs EDCA backoff first enters the IFS time slot inspection state. When the channel is detected to be idle in the IFS, it enters the backoff time slot value detection state. At least one back-off time slot is used for monitoring, and every time the channel is detected to be idle in a back-off time slot, the value of the back-off time slot is reduced by 1 until the value of the back-off time slot is 0, then the station MLD or the access point MLD can pass The link sends PPDUs.
  • the MLD site MLD or access point MLD
  • the MLD determines the first IFS and the initial first backoff slot value of the first link.
  • the first PPDU is a PPDU that needs to be sent through the first link.
  • the station MLD or the access point MLD determines the second IFS of the second link and the initial second backoff time slot value according to the type and access code of the MPDU included in the second PPDU.
  • the second PPDU is a PPDU that needs to be sent through the second link.
  • the MLD determines IFS (AIFS) and CW (Contention Window, contention window) according to the type of MPDU included in the PPDU, and randomly selects an initial backoff time slot value from the determined CW.
  • IFS AIFS
  • CW Contention Window, contention window
  • listen to the first channel through the first link and record the first backoff time slot value according to the listening result of the first channel, including: listening to the first channel through the first link within the duration of the first IFS listening; When the listening result of the first channel is idle within the duration of the first IFS, continue to listen to the first channel in at least one backoff time slot indicated by the initial first backoff time slot value; every time in a backoff time slot When detecting that the first channel is idle, the value of the first backoff time slot is decreased by 1.
  • the back-off slot value corresponds to the number of back-off slots.
  • the initial first back-off slot value of link1/STA1 is 4.
  • the next first time slot is the back-off time slot indicated by the first back-off time slot value of 4. If the value of the first backoff time slot is reduced by 1, the next time slot is the backoff time slot indicated by the first backoff value of 3, and so on.
  • Listening to the second channel through the second link, and recording the second backoff time slot value according to the listening result of the second channel including: listening to the second channel through the second link within the duration of the second IFS listening; when In the duration of the second IFS, the detection result of the second channel is idle, and the second channel is continuously monitored in at least one back-off time slot indicated by the initial second back-off time slot value; When hearing that the second channel is idle, the value of the second backoff time slot is decreased by 1.
  • performing channel detection in the IFS is the IFS time slot inspection state of EDCA backoff; performing channel detection in the backoff time slot according to the backoff time slot value is the backoff time slot value detection state of EDCA backoff.
  • the MLD can keep the backoff slot value unchanged, and continue to perform channel detection in the next backoff slot. Or, MLD can keep the back-off time slot value unchanged.
  • MLD can keep the back-off time slot value unchanged.
  • Step 320 When the value of the first backoff slot reaches the preset value, keep the value of the first backoff slot unchanged at the preset value.
  • the preset value may be 1, or any positive integer.
  • step 330 is directly executed. If the second link is in the IFS time slot check state, or the second link is in the backoff time slot value detection state but the second backoff time slot value does not reach the preset value, then keep the first backoff time slot of the first link The default value is unchanged.
  • the value of the first back-off time slot in the process of keeping the value of the first back-off time slot unchanged, continue to perform channel sensing on the next back-off time slot, but the value of the first back-off time slot will not be reduced after detecting that the channel is idle. If the channel is detected to be busy during the process of keeping the value of the first back-off time slot constant, then the value of the first back-off time slot can be kept unchanged at the preset value, and the next back-off time slot can be monitored; or, Sensing a first IFS, if the channel is idle in a first IFS, continue to perform channel sensing for the next back-off time slot according to the preset value of the first back-off time slot.
  • the back-off state of the first link is obtained; if the first link is not in the back-off time slot value detection state and the first back-off time If the slot value is a preset value, keep the second backoff time slot value unchanged, and wait for the first backoff time slot value of the first link to reach the preset value.
  • any link between the station MLD and the access point MLD can be called “the first link”. ”, or referred to as the “second link”.
  • Step 330 When the value of the first backoff time slot reaches the preset value and the value of the second backoff time slot reaches the preset value, listen to the first channel and the second channel at the same time, and synchronize according to the listening results of the first channel and the second channel Record the first backoff slot value and the second backoff slot value.
  • both the first backoff time slot value and the second backoff time slot value reach the preset value, start synchronously recording the first backoff time slot value and the second backoff time slot value according to the two listening results on the two channels.
  • Synchronous recording means that the first backoff time slot value and the second backoff time slot value always keep the same value. That is, if the value of the first backoff time slot is decreased by 1, the value of the second backoff time slot will also be decreased by 1 at the same time; if the value of the first backoff time slot remains unchanged, the value of the second backoff time slot will also remain unchanged.
  • Step 340 After the first backoff slot value and the second backoff slot value are 0, transmit the PPDU simultaneously through the first channel and the second channel respectively.
  • the first backoff time slot value and the second backoff time slot value are recorded synchronously, which can ensure that the first backoff time slot value and the second backoff time slot value can be reduced to 0 synchronously.
  • the two links can access the channel and send PPDUs at the same time.
  • the first PPDU is sent on the first channel through the first link
  • the second PPDU is sent on the second channel through the second link.
  • STA MLD or AP MLD uses the EDCA backoff mechanism to access the channel, it listens to multiple links respectively, and records the backoff time slot of each link according to the listening result value, when the backoff slot value of a link reaches the preset value, keep the backoff slot value of this link unchanged until the backoff slot value of the other link also reaches the preset value, and then According to the interception results obtained by monitoring on multiple links, multiple back-off slot values of multiple links are recorded synchronously, so that the back-off slot values of multiple links can be guaranteed. It can be reduced to 0 synchronously. After the backoff slot value of multiple links reaches 0 at the same time, STA MLD or AP MLD can send PPDU through multiple links.
  • FIG. 10 shows a flowchart of a multi-link communication method provided by an embodiment of the present application.
  • the method can be applied to any MLD as a sending end in the communication system shown in FIG. 1 , and the MLD is a station MLD or an access point MLD.
  • the method may include the steps of:
  • Step 310 Carry out the EDCA backoff process on the first link and the second link, listen to the first channel through the first link, and record the first backoff time slot value according to the listening result of the first channel; The road detects the second channel, and records the second backoff time slot value according to the detection result of the second channel.
  • Step 321 When the value of the first backoff time slot reaches a preset value, acquire the backoff state of the second link.
  • the first link is a part of links in the embodiment shown in FIG. 7
  • the second link is other links. That is, the first attribute value (the first backoff slot value) of some links (the first link) in the at least two links reaches a preset value, and the other links (the first link) in the at least two links When the second link) is in the IFS time slot check state, keep the first attribute value of some links (the first link) unchanged from the preset value.
  • the backoff state includes an IFS slot check state and a backoff slot value detection state.
  • the MLD listens to the channel within the IFS.
  • the MLD monitors the channel within the back-off slot value indicated by the back-off slot value, and records the back-off slot value according to the monitoring result.
  • step 322 and step 323 may be skipped and step 331 may be directly executed.
  • Step 322 When the backoff state of the second link is the IFS time slot checking state, keep the first backoff time slot as a preset value.
  • the first link keeps the first backoff time slot value as a preset value, waits for the second link to enter the backoff time slot value detection state and the second The backoff time slot value reaches the preset value.
  • the default value is 1, as shown in Figure 9, after the first backoff time slot value of link1/STA1 reaches 1, the backoff state of link2/STA2 is obtained, and STA2 is in the IFS time slot check state at this time, then keep STA1 The value of 1 for the first backoff slot remains unchanged.
  • the back-off state of the second link is the IFS time slot check state
  • Step 323 When the back-off state of the second link is the back-off slot value detection state, and the second back-off slot value does not reach the preset value, keep the first back-off slot value unchanged.
  • the back-off state of the second link is the back-off time slot value detection state, and the second back-off time slot value does not reach the preset value, keep the first back-off time slot value unchanged and continue to listen In the next backoff time slot, the backoff state of the second link is continuously checked.
  • the first back-off slot value of the first link (link1/STA1) reaches 1, the first back-off slot value remains 1.
  • the obtained backoff state of the second link (link2/STA2) is the backoff slot value detection state, and the second backoff slot value is 2, which does not reach 1 (backoff slot count>1), then keep the value of the first backoff slot as 1 to continue listening to the first channel, and keep checking the backoff status of the second link.
  • Step 331 When the value of the first backoff time slot reaches the preset value and the value of the second backoff time slot reaches the preset value, simultaneously monitor the first channel and the second channel.
  • Simultaneous monitoring refers to recording the first backoff time slot value and the second backoff time slot value at the same time according to the monitoring results of the first channel and the second channel, instead of: recording the first backoff time slot according to the monitoring results of the first channel value, and record the value of the second backoff time slot according to the listening result of the second channel.
  • both the first backoff time slot value and the second backoff time slot value reach the preset value, listen to the first channel and the second channel, and record the first backoff time slot synchronously according to the monitoring results of the first channel and the second channel value and the second backoff slot value.
  • the first backoff time slot value of the first link (link1/STA1) is reduced to 1
  • the second link (link2/STA2) is in the IFS time slot check state, and the first backoff time slot remains The time slot value is 1, and the back-off status of the second link is continuously checked.
  • the second back-off time slot value is reduced by 1 (from 2 to 1), then At this time, the second backoff time slot value and the first backoff time slot value are both 1, starting from the backoff time slot 403, the first backoff time slot value and the second backoff time slot value are recorded synchronously according to the listening results of the first channel and the second channel slot value.
  • Step 332 When the listening results of the first channel and the second channel are both idle, decrement the value of the first backoff time slot and the value of the second backoff time slot by 1.
  • both the first back-off time slot value and the second back-off time slot value are decremented by 1 synchronously.
  • the preset value is n, and n is a positive integer.
  • the value of the first back-off time slot and the second back-off time slot are i, the first channel and the second channel are detected to be idle, and the first back-off time slot value and the second back-off time slot value minus 1, the first backoff slot value and the second backoff slot value become i-1, where i is a positive integer not greater than n.
  • the preset value is 1, when the listening results of the first channel and the second channel are both idle, the first backoff time slot value and the second backoff time slot value are subtracted by 1, then the first backoff time The slot value and the second backoff slot value are 0.
  • the first backoff time slot value and the second backoff time slot value are changed from 1 to 0, if The corresponding backoff time slot 404 detects that the first channel and the second channel are idle, and then can send the UL PPDU on the first channel and the second channel.
  • step 332 when the first backoff time slot value and the second backoff time slot value are not 0, continue to listen to the first backoff time slot value when the first backoff time slot value and the second backoff time slot value are i-1.
  • the first channel and the second channel synchronously record the first backoff time slot value and the second backoff time slot value according to the listening results on the first channel and the second channel. That is, if the first backoff time slot value and the second backoff time slot value are not 0, then continue to listen to the first channel and the second channel in the backoff time slot corresponding to i-1, and continue to synchronously record the first channel according to the listening result. backoff slot value and second backoff slot value.
  • Step 333 Keep the first backoff time slot value and the second backoff time slot value unchanged when at least one of the first channel and the second channel is detected as busy.
  • the preset value is n, and n is a positive integer.
  • the detection result of at least one channel in the first channel and the second channel is detected as busy, and the first backoff time slot value and the second backoff time slot value are kept. 2.
  • the value of backoff time slot i remains unchanged.
  • first backoff time slot value and the second backoff time slot value are i
  • at least one of the first channel and the second channel is detected to be busy in the backoff time slot corresponding to i, then the first backoff time slot is maintained
  • the time slot value and the second backoff time slot value i remain unchanged.
  • Mode 1 Continue to maintain the detection state of the back-off slot value, and continue to detect the next back-off slot according to the value i of the first back-off slot value and the second back-off slot value.
  • Mode 2 The link whose channel is idle continues to maintain the backoff time slot value detection state, and continues to monitor the channel according to the backoff time slot value unchanged (for i); the channel is a busy link and then re-enters the IFS time slot inspection state, Check whether the channel is idle within one IFS, re-enter the backoff time slot value detection state after the channel is idle, and continue to monitor the channel according to the backoff time slot value i. If the two backoff time slot values are both i, the two backoff time slot values are recorded synchronously according to the interception result.
  • the interception result of at least one channel is busy, including the following three situations:
  • Case 1 The first channel is busy and the second channel is idle.
  • Case 2 The first channel is idle and the second channel is busy.
  • step 333 For the above two ways and three situations, the present application provides the following several embodiments to illustrate step 333 .
  • Keep the first link and the second link in the backoff time slot value detection state continue to listen to the first channel and the second channel synchronously according to the first backoff time slot value and the second backoff time slot value, according to The monitoring results of the first channel and the second channel are synchronously recorded with the first backoff time slot value and the second backoff time slot value.
  • the two links are maintained in the backoff time slot value detection state, and the first channel and the second channel are continuously monitored synchronously according to the backoff time slot value unchanged.
  • the backoff time slot 405 corresponding to 1 detects that the second channel is busy and the first channel is idle. , then keep the first backoff time slot value and the second backoff time slot value as 1, and continue to listen to the first channel and the second channel in the backoff time slot 406 according to the first backoff time slot value and the second backoff value of 1 . If it is sensed that the first channel and the second channel are idle in the backoff time slot 406, the first backoff time slot value and the second backoff time slot value are reduced to 0.
  • the backoff time slot 405 corresponding to 1 detects that the first channel is busy and the second channel is If it is idle, keep the first backoff time slot value and the second backoff time slot value as 1, and continue to listen to the first channel and the second channel in the backoff time slot 406 according to the first backoff time slot value and the second backoff value of 1. channel.
  • the first backoff time slot value and the second backoff time slot value are reduced to 0. And after the backoff time slot corresponding to the backoff time slot value of 0 ends, the access channel sends the PPDU.
  • the first link re-enters the IFS time slot inspection state, and listens to the first channel through the first link in the first IFS;
  • the listening result of the first channel in the first IFS When the listening result of the first channel in the first IFS is idle, continue to listen to the first channel and the second channel synchronously according to the first backoff time slot value and the second backoff time slot value i, according to the first channel and the second channel
  • the monitoring result of the second channel synchronously records the first backoff time slot value and the second backoff time slot value.
  • the second link keeps the backoff slot value detection state unchanged according to the second backoff slot value of 1, and the first link (link1/STA1) re-enters the IFS slot check state.
  • the first link After the first link detects that the second channel is idle in the IFS, it enters the backoff slot value detection state again according to the first backoff time slot value of 1, and continues to synchronously detect the first channel from the backoff time slot 408 and the second channel, and synchronously record the first backoff time slot value and the second backoff time slot value according to the interception result.
  • the second link when the first link enters the IFS time slot check state and the second link maintains the backoff time slot value detection state, if the second channel is detected to be busy on the second link, the second link The link can keep the value of the second back-off slot unchanged and continue to maintain the back-off slot value detection state; the second link can also re-enter the IFS slot check state, and re-enter the back-off slot after detecting that the channel is idle in the IFS Value detection state (the value of the second backoff time slot remains unchanged (is 1)).
  • the first channel is detected as idle and the second channel is busy, and the first link is kept in backoff state Time slot value detection state; the second link re-enters the IFS time slot inspection state, and listens to the second channel through the second link in the second IFS;
  • the listening result of the second channel in the second IFS When the listening result of the second channel in the second IFS is idle, continue to listen to the first channel and the second channel synchronously according to the first backoff time slot value and the second backoff time slot value i, according to the first channel and the second channel
  • the monitoring result of the second channel synchronously records the first backoff time slot value and the second backoff time slot value.
  • the first link (link1/STA1) keeps the backoff slot value detection state unchanged according to the first backoff slot value of 1, and the second link (link2/STA2) re-enters the IFS slot check state.
  • the second link After the second link detects that the second channel is idle in the IFS, it enters the backoff time slot value detection state according to the second backoff time slot value of 1, and continues to synchronously detect the first channel from the backoff time slot 408 and the second channel, and synchronously record the first backoff time slot value and the second backoff time slot value according to the interception result.
  • the first link when the second link enters the IFS time slot check state and the first link maintains the backoff time slot value detection state, if the first channel is detected to be busy on the first link, the first link The link can keep the value of the first back-off slot unchanged and continue to maintain the back-off slot value detection state; the first link can also re-enter the IFS slot check state, and re-enter the back-off slot after detecting that the channel is idle in the IFS Value detection state (the value of the first backoff slot remains unchanged (is 1)).
  • the first link first enters the backoff slot value detection state.
  • the first backoff time slot value and the second backoff time slot value are i
  • the first channel and the second channel are detected to be busy, and the first link and the second link are re-entered into the IFS Time slot check status, listening to the first channel through the first link in the first IFS, and listening to the second channel through the second link in the second IFS;
  • the first link When the detection result of the first channel in the first IFS is idle, the first link enters the backoff time slot value detection state, and keeps the first backoff time slot value i to monitor the first channel.
  • the first link when the detection result of the first channel in the first IFS is idle, the first link enters the backoff time slot value detection state, and the backoff state of the second link is obtained, when The backoff state of the second link is the IFS time slot check state, and the first backoff time slot value is maintained to be i to continue listening to the first channel.
  • the listening result of the second channel in the second IFS When the listening result of the second channel in the second IFS is idle, continue to listen to the first channel and the second channel synchronously according to the first backoff time slot value and the second backoff time slot value i, according to the first channel and the second backoff time slot value
  • the monitoring results of the two channels record the first backoff time slot value and the second backoff time slot value synchronously.
  • both the first backoff time slot value and the second backoff time slot value are 1, both the first channel and the second channel are detected to be busy in the backoff time slot 407 corresponding to 1, Then the first link (link1/STA1) and the second link (link2/STA2) re-enter the IFS time slot check state. Assuming that the first IFS duration of the first link is shorter than the second IFS of the second link, the first link ends the IFS time slot checking state first. After the first link detects that the first channel is idle in the IFS, it enters the backoff slot value detection state according to the first backoff time slot value of 1, and obtains the backoff state of the second link.
  • the first link keeps the first backoff time slot value of 1 and waits for the second link to re-enter the backoff time slot value detection state according to the second backoff time slot value of 1.
  • the second link detects that the second channel is idle in the second IFS, it enters the backoff slot value detection state according to the second backoff time slot value of 1, and then starts from the backoff time slot 409 to continue synchronous detection
  • the first channel and the second channel synchronously record the first backoff time slot value and the second backoff time slot value according to the interception result.
  • the second link first enters the backoff slot value detection state.
  • the first backoff time slot value and the second backoff time slot value are i
  • the first channel and the second channel are detected to be busy, and the first link and the second link are re-entered into the IFS Time slot check status, listening to the first channel through the first link in the first IFS, and listening to the second channel through the second link in the second IFS;
  • the second link When the listening result of the second channel in the second IFS is idle, the second link is entered into the backoff time slot value detection state, and the second backoff time slot value is kept to be i to listen to the second channel; in an optional In the embodiment, when the detection result of the second channel in the second IFS is idle, the second link enters the backoff time slot value detection state, obtains the backoff state of the first link, and when the first link The backoff state is the IFS time slot check state, and the value of the second backoff time slot is kept as i to continue listening to the second channel.
  • the listening result of the first channel in the first IFS When the listening result of the first channel in the first IFS is idle, continue to listen to the first channel and the second channel synchronously according to the first backoff time slot value and the second backoff time slot value i, according to the first channel and the second backoff time slot value
  • the monitoring results of the two channels record the first backoff time slot value and the second backoff time slot value synchronously.
  • both the first backoff time slot value and the second backoff time slot value are 1, both the first channel and the second channel are detected to be busy in the backoff time slot 407 corresponding to 1, Then the first link (link1/STA1) and the second link (link2/STA2) re-enter the IFS time slot check state. Assuming that the first IFS duration of the first link is longer than the second IFS of the second link, the second link first ends the IFS time slot checking state. After the second link detects that the second channel is idle in the IFS, it enters the backoff slot value detection state according to the second backoff time slot value of 1, and obtains the backoff state of the first link.
  • the second link keeps the second backoff time slot value of 1 and waits for the first link to re-enter the backoff time slot value detection state according to the first backoff time slot value of 1.
  • the first link detects that the first channel is idle in the first IFS, it enters the backoff slot value detection state according to the first backoff time slot value of 1, and then starts from the backoff time slot 409 to continue synchronous detection
  • the first channel and the second channel synchronously record the first backoff time slot value and the second backoff time slot value according to the interception result.
  • the second link and the first link enter the backoff slot value detection state at the same time.
  • the first backoff time slot value and the second backoff time slot value are i
  • the first channel and the second channel are detected to be busy, and the first link and the second link are re-entered into the IFS Time slot check status, listening to the first channel through the first link in the first IFS, and listening to the second channel through the second link in the second IFS;
  • the first link and the second link enter the backoff time slot value detection state, Continue to listen to the first channel and the second channel synchronously according to the first backoff time slot value and the second backoff time slot value i, and record the first backoff time slot value and Second backoff slot value.
  • Step 340 After the first backoff slot value and the second backoff slot value are 0, transmit the PPDU simultaneously through the first channel and the second channel respectively.
  • the MLD may send the PPDU through the first channel and the second channel when the first backoff slot value and the second backoff slot value decrease to 0, and when the backoff slot corresponding to 0 ends. That is, when the first backoff slot value and the second backoff slot value are reduced to 0, and the 0th backoff slot ends, PPDUs are simultaneously sent through the first channel and the second channel respectively; the 0th backoff slot is the back-off slot corresponding to the first back-off slot value and the second back-off slot value of 0.
  • the first link and the second link can be on the first channel and the second channel respectively Send the PPDU on.
  • the MLD may also pass the first and second backoff slots when the value of the first backoff time slot and the second backoff time slot are reduced to 0, and the first channel and the second channel are detected to be idle in the backoff time slot corresponding to 0.
  • the first channel and the second channel transmit PPDUs. That is, when the value of the first backoff time slot and the second backoff time slot are reduced to 0, and the detection results of the first channel and the second channel are both idle in the 0th backoff time slot, the first channel and the second channel are respectively passed
  • the second channel transmits the PPDU at the same time; the 0th backoff slot is the backoff slot corresponding to the first backoff slot value and the second backoff slot value of 0.
  • the backoff time slot 410 corresponding to the first backoff time slot value and the second backoff time slot value of 1 the first channel and the second channel are sensed to be idle, then the first backoff time The slot value and the second backoff time slot value are reduced to 0, and then continue to listen to the first channel and the second channel at the backoff time slot 411 corresponding to the first backoff time slot value and the second backoff time slot value of 0.
  • the backoff time slot 411 detects that the first channel and the second channel are idle, the first link and the second link can send PPDUs on the first channel and the second channel respectively after the backoff time slot 411 ends.
  • the first backoff time slot value and the second backoff time slot value can be kept. If the time slot value is 0, continue to monitor the first channel and the second channel in the next backoff time slot, and if both channels are idle, then send PPDUs on the two channels.
  • the method provided by this embodiment meets the requirements of the IEEE 802.11 protocol, and the EDCA backoff process is still performed on the NSTR links.
  • This method can enable NSTR STA MLD to have more opportunities and probabilities to satisfy the conditions for accessing the channel on two NSTR links at the same time, and align the sending PPDU Start Time on the two NSTR links together.
  • FIG. 22 shows a block diagram of a multi-link communication device provided by an embodiment of the present application.
  • the device has the function of realizing the above method example, and the function may be realized by hardware, or may be realized by executing corresponding software by hardware.
  • the apparatus may be the multi-link device as the receiving end described above, or it may be set in the multi-link device as the sending end, and the multi-link device is a station MLD or an access point MLD.
  • the multi-link includes: at least two links between the station multi-link device and the access point multi-link device, and the device includes:
  • a monitoring module 801 configured to monitor the first attribute values of the at least two links, and/or, the channel status of the at least two links;
  • An access module 802 configured to simultaneously access the at least two links when the first attribute values of the at least two links and/or the channel states of the at least two links meet a first condition into the channel.
  • the access module 802 is configured to allow the first attribute values of some of the at least two links to reach a preset value, and the other of the at least two links When the first attribute value of the link does not reach the preset value, keep the first attribute value of the part of the link unchanged at the preset value;
  • the access module 802 is configured to: when the first attribute values of the at least two links both reach the preset value, and the channel states of the at least two links are both idle, the At least two links access the channel simultaneously.
  • the access module 802 is configured to use the first attribute value of the part of the at least two links reaching a preset value, and the at least two links When the other links in the road are in the IFS time slot check state, keep the first attribute value of the part of the links unchanged from the preset value.
  • the access module 802 is configured to allow the first attribute value of the part of the at least two links to reach a preset value, and the at least two links In the case where the other links are in the attribute value detection state, and the first attribute values of the other links do not reach the preset value, keep the first attribute value of the part of the links as described The default is unchanged.
  • the access module 802 is configured to achieve the preset value when the first attribute values of the at least two links reach the preset value, and the channel states of the at least two links When both are idle, synchronously decrement the first attribute value of the at least two links by 1;
  • the access module 802 is configured to simultaneously access channels for the at least two links after the first attribute values of the at least two links are both 0.
  • the monitoring module 801 is configured to continue to monitor channel states of the at least two links when the first attribute values of the at least two links are greater than 0.
  • the monitoring module 801 is configured to keep the channel status of at least one of the at least two links in a busy state. An attribute value remains unchanged.
  • the monitoring module 801 is configured to: in the case where the channel state of the first part of the links is idle and the channel state of the second part of the links is busy among the at least two links, The first attribute values of the at least two links are kept unchanged, and the at least two links are kept in the attribute value detection state.
  • the monitoring module 801 is configured to: in the case where the channel state of the first part of the links is idle and the channel state of the second part of the links is busy among the at least two links, Keeping the first attribute values of the at least two links unchanged, maintaining the first part of the links in the attribute value detection state; re-entering the second part of the links into the IFS time slot inspection state;
  • the monitoring module 801 is configured to re-enter the attribute value detection state of the second part of the links when the channel state of the second part of the links in the IFS is idle.
  • the monitoring module 801 is configured to keep the first attribute values of the at least two links unchanged when the channel states of the at least two links are both busy , re-entering the at least two links into the IFS time slot checking state;
  • the monitoring module 801 is configured to re-enter the attribute value detection state of the at least two links when the channel state of the at least two links in the IFS is idle.
  • the access module 802 is configured to, when the first attribute values of the at least two links are both 0 and the 0th backoff time slot ends, the at least two The link accesses the channel at the same time;
  • the 0th backoff time slot is a backoff time slot corresponding to the first attribute value of the at least two links being 0.
  • the access module 802 is configured to: when the first attribute values of the at least two links are both 0, and the at least two links in the 0th backoff time slot When the channel states of all are idle, the at least two links access the channel at the same time;
  • the 0th backoff time slot is a backoff time slot corresponding to the first attribute value of the at least two links being 0.
  • the preset value includes 1.
  • the first attribute value includes a backoff time slot value.
  • the channel state includes idle and busy.
  • the device provided by the above embodiment realizes its functions, it only uses the division of the above-mentioned functional modules as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.
  • FIG. 23 shows a schematic structural diagram of a multi-link device provided by an embodiment of the present application.
  • the multi-link device may include: a processor 1101 , a receiver 1102 , a transmitter 1103 , a memory 1104 and a bus 1105 .
  • the processor 1101 includes one or more processing cores, and the processor 1101 executes various functional applications and multi-link communication by running software programs and modules.
  • the receiver 1102 and the transmitter 1103 can be realized as a transceiver 1106, and the transceiver 1106 can be a communication chip.
  • the memory 1104 is connected to the processor 1101 through the bus 1105 .
  • the memory 1104 may be used to store a computer program, and the processor 1101 is used to execute the computer program, so as to implement various steps performed by the terminal device in the foregoing method embodiments.
  • the memory 1104 can be realized by any type of volatile or non-volatile storage device or their combination, and the volatile or non-volatile storage device includes but not limited to: random-access memory (Random-Access Memory, RAM) And read-only memory (Read-Only Memory, ROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, EPROM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), flash memory or other solid-state storage technologies, compact disc read-only memory (CD-ROM), high-density digital video disc (Digital Video Disc, DVD) or other optical storage, tape cartridges, tapes, disks storage or other magnetic storage devices.
  • RAM Random-Access Memory
  • ROM read-only memory
  • EPROM erasable programmable read-only memory
  • EPROM erasable programmable Read-Only Memory
  • EEPROM Electrically erasable programmable read-only memory
  • the processor and the transceiver involved in the embodiment of the present application may execute the steps performed by the multi-link device in any of the methods shown in FIG. 6 , FIG. 7 , FIG. 8 , and FIG. 10 , and details are not repeated here.
  • An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is configured to be executed by a processor of a multi-link device, so as to implement the foregoing multi-link communication method.
  • the computer-readable storage medium may include: a read-only memory (Read-Only Memory, ROM), a random-access memory (Random-Access Memory, RAM), a solid-state hard drive (Solid State Drives, SSD) or an optical disc.
  • the random access memory may include resistive random access memory (Resistance Random Access Memory, ReRAM) and dynamic random access memory (Dynamic Random Access Memory, DRAM).
  • the embodiment of the present application also provides a chip, the chip includes a programmable logic circuit and/or program instructions, and when the chip runs on a multi-link device, it is used to implement the above-mentioned multi-link communication method.
  • An embodiment of the present application also provides a computer program product or computer program, where the computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and the processor of the multi-link device reads from the The computer-readable storage medium reads and executes the computer instructions, so as to implement the above-mentioned multi-link communication method.
  • the processor in this embodiment of the present application includes: an application specific integrated circuit (Application Specific Integrated Circuit, ASIC).
  • ASIC Application Specific Integrated Circuit
  • the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
  • the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.
  • the "plurality” mentioned herein means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently.
  • the character “/” generally indicates that the contextual objects are an "or” relationship.
  • the numbering of the steps described herein only exemplarily shows a possible sequence of execution among the steps.
  • the above-mentioned steps may not be executed according to the order of the numbers, such as two different numbers
  • the steps are executed at the same time, or two steps with different numbers are executed in the reverse order as shown in the illustration, which is not limited in this embodiment of the present application.
  • the functions described in the embodiments of the present application may be implemented by hardware, software, firmware or any combination thereof.
  • the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage media may be any available media that can be accessed by a general purpose or special purpose computer.

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Abstract

本申请公开了一种多链路通信方法、装置、设备及介质，涉及通信技术领域。该方法由站点多链路设备或接入点多链路设备执行，多链路包括：站点多链路设备和接入点多链路设备之间的至少两个链路，该方法包括：监测至少两个链路的第一属性值，和/或，至少两个链路的信道状态(510)；在至少两个链路的第一属性值和/或至少两个链路的信道状态满足第一条件的情况下，至少两个链路同时接入信道(520)。该方法可以同时进行PPDU的发送。

Description

多链路通信方法、装置、设备及介质 技术领域
本申请实施例涉及通信技术领域，特别涉及一种多链路通信方法、装置、设备及介质。
背景技术
在IEEE(Institute of Electrical and Electronics Engineers，电气与电子工程师协会)802.11be中，定义了可以支持多链路(Multiple Links)的功能。按照IEEE 802.11中对通信两端的定义，站点(Station，STA)多链路设备(Multi-Link Device，MLD)和接入点(Access Point，AP)MLD之间建立了多条链路，STA MLD和AP MLD可以利用多链路的优势，在多个链路上进行数据收发，以达到高吞吐、低时延等优势。
在支持多链路功能(Multiple Links Operation，MLO)的互连的两个设备，定义了一种支持IEEE 802.11be的NSTR(Non-simultaneous Transmission and Reception，不可同时收发)STA MLD设备，在这种支持多链路的设备里，由于射频(Radio Frequency，RF)等的限制，当一个链路在做发送(transmission)时，会在设备内的造成相互干扰(in-device interference)，另一个链路无法做正常接收(reception)，导致无法在多个链路上独立同时进行数据收发。即，如果这种NSTR STA MLD设备想要同时使用多个链路，需要在多个链路上同时发送或是同时接收。
发明内容
本申请实施例提供了一种多链路通信方法、装置、设备及介质。所述技术方案如下：
根据本申请实施例的一个方面，提供了一种多链路通信方法，所述方法由站点多链路设备或接入点多链路设备执行，所述多链路包括：所述站点多链路设备和接入点多链路设备之间的至少两个链路，所述方法包括：
监测所述至少两个链路的第一属性值，和/或，所述至少两个链路的信道状态；
在所述至少两个链路的第一属性值和/或所述至少两个链路的信道状态满足第一条件的情况下，所述至少两个链路同时接入信道。
根据本申请实施例的一个方面，提供了一种多链路通信装置，所述多链路包括：所述站点多链路设备和接入点多链路设备之间的至少两个链路，所述装置包括：
监测模块，用于监测所述至少两个链路的第一属性值，和/或，所述至少两个链路的信道状态；
接入模块，用于在所述至少两个链路的第一属性值和/或所述至少两个链路的信道状态满足第一条件的情况下，所述至少两个链路同时接入信道。
根据本申请实施例的一个方面，提供了一种多链路设备，所述多链路设备包括处理器；
所述处理器，用于监测所述至少两个链路的第一属性值，和/或，所述至少两个链路的信道状态；
所述处理器，用于在所述至少两个链路的第一属性值和/或所述至少两个链路的信道状态满足第一条件的情况下，所述至少两个链路同时接入信道。
示例性的，所述处理器包括：专用集成电路(Application Specific Integrated Circuit，ASIC)。
根据本申请实施例的一个方面，提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于处理器执行，以实现上述多链路通信方法。
根据本申请实施例的一个方面，提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片运行时，用于实现上述多链路通信方法。
根据本申请实施例的一个方面，提供了一种计算机程序产品或计算机程序，所述计算机程序产品或计算机程序包括计算机指令，所述计算机指令存储在计算机可读存储介质中，处理器从所述计算机可读存储介质读取并执行所述计算机指令，以实现上述多链路通信方法。
本申请实施例提供的技术方案可以带来如下有益效果：
STA MLD或AP MLD在使用EDCA(Enhanced Distributed Channel Access，增强型分布式信道访问)backoff(退避)机制接入信道时，分别对多个链路进行侦听，根据侦听结果记录每个链路的第一属性值，当一个链路的第一属性值达到预设值时，保持这个链路的第一属性值不变，直至其他链路的第一属性值也达到了预设值，然后同时对多个链路进行侦听，根据在多个链路上侦听得到的侦听结果，同步地记录多个链路的多个第一属性值。在如此，可以保证多个链路的第一属性值可以同步地减少至0，以便STA MLD或AP MLD可以通过多个链路发送PPDU(PHY Protocol Data Unit，物理层协议包单元)。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请一个实施例提供的无线局域网的示意图；
图2是本申请一个实施例提供的站点MLD和接入点MLD之间建立多链路的示意图；
图3是本申请一个实施例提供的多链路通信的示意图；
图4是本申请一个实施例提供的多链路通信的示意图；
图5是本申请一个实施例提供的多链路通信的示意图；
图6是本申请一个实施例提供的多链路通信方法的流程图；
图7是本申请一个实施例提供的多链路通信方法的流程图；
图8是本申请一个实施例提供的多链路通信方法的流程图；
图9是本申请一个实施例提供的多链路通信的示意图；
图10是本申请一个实施例提供的多链路通信方法的流程图；
图11是本申请一个实施例提供的多链路通信的示意图；
图12是本申请一个实施例提供的多链路通信的示意图；
图13是本申请一个实施例提供的多链路通信的示意图；
图14是本申请一个实施例提供的多链路通信的示意图；
图15是本申请一个实施例提供的多链路通信的示意图；
图16是本申请一个实施例提供的多链路通信的示意图；
图17是本申请一个实施例提供的多链路通信的示意图；
图18是本申请一个实施例提供的多链路通信的示意图；
图19是本申请一个实施例提供的多链路通信的示意图；
图20是本申请一个实施例提供的多链路通信的示意图；
图21是本申请一个实施例提供的多链路通信的示意图；
图22是本申请一个实施例提供的多链路通信装置的框图；
图23是本申请一个实施例提供的多链路设备的结构示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
本申请实施例描述的网络架构以及业务场景是为了更加清楚地说明本申请实施例的技术方案，并不构成对本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
请参考图1，其示出了本申请一个示例性实施例提供的无线局域网的框图，该无线局域网可以包括：站点(STA)MLD10和接入点(AP)MLD 20。
其中，站点MLD 10和接入点MLD 20之间存在多链路。
接入点MLD 20是一种部署在无线局域网中用以为站点MLD 10提供无线通信功能的设备。站点MLD10可以包括：用户设备(User Equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、无线通信设备、用户代理或用户装置。可选地，站点MLD 10还可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digita1Assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，本申请实施例对此并不限定。
在本申请实施例中，站点MLD 10和接入点MLD 20均支持IEEE 802.11标准。
在介绍本申请技术方案之前，先对本申请涉及的一些技术知识进行介绍说明。
在IEEE 802.11be中，定义了可以支持IEEE 802.11多链路的功能。按IEEE 802.11中对于通信两端的定义，一个是站点MLD，一个是接入点MLD。相互建立了多链路的站点MLD和接入点MLD可以利用多链路的优势，在多个链路上进行数据收发，以达到高吞吐/低时延等优势。
在支持多链路功能(Multiple Links Operation，MLO)互连的两个设备，定义了一种支持802.11be的NSTR(Non-simultaneous Transmission and Reception，不可同时收发)STA MLD，在这种支持多链路(Multiple  Links)的NSTR STA MLD里，由于射频等的限制，当一个链路在做发送(transmission)时，会在设备内的造成相互干扰(in-device interference)，另一个链路无法做正常接收(reception)，导致无法在多个链路上独立同时进行数据收发，即如果这种NSTR STA MLD想要同时使用多个链路，需要在多个链路上同时发送或是同时接收。
如图2所示，是一个UL(Up Link，上行)过程，在理想情况下，NSTR STA MLD在两个链路上的发送是对齐(Align)在一起的，接收也是对齐(align)在一起。例如，NSTR STA MLD同时在link1/STA1和link2/STA2上发送UL PPDU，以及同时接收AP MLD在link1/AP1和link2/AP2发送的BA(Block Acknowledgement，块确认)。
因为在当前IEEE 802.11be中，即使在NSTR Links(链路)上，每个link(链路)上的信道接入(channel access)方式是相互独立的，即每个link都要使用基准IEEE 802.11的EDCA机制来接入信道。IEEE 802.11中的EDCA是基于CSMA/CA(Carrier Sense Multiple Access with Collision Avoidance，载波侦听多路访问/冲突避免)机制，根据所需要发送的帧(frame)的类型和/或接入码(Access Code，AC)，先选择一个帧间间隔时间(Inter Frame Space，IFS)，以及一个初始随机的退避时隙值(backoff slot count)；如果在这个IFS内信道都是空闲(idle)的，则开始在每个backoff slot(退避时隙)中继续侦测信道，如果在某个backoff slot中信道是idle的，则减少backoff slot count，继续在下一个backoff中侦测信道，直到backoff slot count减少到0。
在目前IEEE 802.11中，NSTR STA MLD在NSTR links上同时发送时，要求在UL PPDU的Start Time(启始时间)要对齐，又因为NSTR links中的每一个link是独立进行信道接入EDCA的，这意味着NSTR STA MLD在NSTR links上必须所有的NSTR Links的EDCA backoff slot count都减少到0，才允许在任一link上接入信道。
如图3所示，在NSTR STA MLD中，在link2/STA2上backoff slot count首先减为0，完成了EDCA backoff(退避)过程；但此时link1/STA1上仍然在进行EDCA backoff过程，此时为了满足NSTR links上的PPDU的Start Time需要对齐，STA1不允许接入信道/发送帧，导致STA2上也无法发送数据包。
在当前802.11be中，有两种机制解决上述问题，以满足NSTR links上的PPDU的Start Time需要对齐在一起的要求。
机制一：在NSTR STA MLD中，任一link上完成EDCA backoff后，检查另一link上是否完成了EDCA backoff过程，如果另外一link上没有完成EDCA backoff，则当前link重新进行EDCA backoff过程。直到两个link上的EDCA bakcoff同时完成。
如图3所示，STA2已经完成了EDCA backoff过程，但STA1上还在进行EDCA backoff过程，所以STA2需要重新进行EDCA backoff过程，直到两个link上的STA1/STA2同时完成EDCA backoff过程。
机制二：在NSTR STA MLD中，任一link上完成EDCA backoff后，检查另一link上是否完成了EDCA backoff过程，如果另外一link上没有完成EDCA backoff，则当前link继续保持(hold)它的backoff slot count为0，直到另一link上完成了EDCA backoff过程，即backoff slot count也为0，这时，NSTR STA MLD在两个link上同时发送PPDU。
如图4所示，STA1已经完成了EDCA backoff过程，但STA2上还在进行EDCA backoff过程，所以STA1保持backoff slot count为0，直到STA2的backoff slot count为0，NSTR STA MLD在两个link上同时发送PPDU。
在机制一中，因为两个link上都是独立进行EDCA backoff，两个link上相互独立的EDCA backoff过程同时完成的概率会很小。而在机制二中，相比较机制一的好处是，会保持某个link上的backoff slot count为0，但仍然存在一个缺陷是，一旦当前这个link上侦测到信道繁忙(busy)，当前这个link仍然需要重新进行EDCA backoff过程。例如，如图5所示，STA1已经完成了EDCA backoff过程，但STA2上还在进行EDCA backoff过程，所以STA1保持backoff slot count为0继续侦听，而在STA2的backoff slot count为2的退避时隙，STA1上侦听到信道繁忙，则此时，STA1需要重新进行EDCA backoff过程，直到STA2和STA1的backoff slot count同时为0，NSTR STA MLD在两个link上同时发送PPDU。如此，便会导致两个link上同时backoff slot count为0的概率下降。
在一种可选的实施例中，本申请为解决上述机制一和机制二的缺点，提供了如下方法：
NSTR STA MLD为同时使用两个NSTR Links，每个link上仍然是独立进行EDCA backoff过程；当某个link上的backoff slot count减少到1时，检查另外一个link上的backoff的状态。
1)如果另外link上的backoff还是处在IFS时隙检查状态，或是处于backoff slot count侦测状态且其backoff slot count的剩余值是大于1的，则当前link的backoff slot count保持1不变，并继续检查另外link上的backoff状态。
2)如果另外link处于backoff slot count侦测状态，且其backoff slot count的剩余值也为1，则：
如果在两个link上当前剩余backoff slot count为1的退避时隙内，两个link都侦测到信道为idle时，两个link同时将剩余backoff slot count减少到0，然后两个link同时可以接入信道；
如果在两个link上当前剩余backoff slot count为1的退避时隙内，其中有一个或两个link上侦测到信道为繁忙busy，则两个link仍然保持剩余backoff slot count＝1，并继续检查两个link上的信道状态。
下面，通过几个实施例对本申请技术方案进行介绍说明。
请参考图6，其示出了本申请一个实施例提供的多链路通信方法的流程图。该方法可应用于图1所示的通信系统中的任一作为发送端的MLD中，该MLD为站点MLD或接入点MLD。该方法可以包括如下步骤：
步骤510：监测至少两个链路的第一属性值，和/或，至少两个链路的信道状态。
多链路包括：站点多链路设备和接入点多链路设备之间的至少两个链路。
示例性的，至少两个链路可以是站点多链路设备和接入点多链路设备之间的全部链路或部分链路。
示例性的，第一属性值包括退避时隙值。示例性的，每个链路对应有一个第一属性值，x个链路对应有x个第一属性值。
每个链路对应有一个信道，通过各个链路监测链路所对应的信道，得到信道状态。
信道状态包括空闲和繁忙。
步骤520：在至少两个链路的第一属性值和/或至少两个链路的信道状态满足第一条件的情况下，至少两个链路同时接入信道。
可选地，在至少两个链路的第一属性值相同，且至少两个链路的信道状态为空闲的情况下，至少两个链路同时接入信道。
可选地，在至少两个链路的第一属性值为1，且在下一个退避时隙内至少两个链路的信道状态为空闲的情况下，将至少两个链路的第一属性值减为0后，至少两个链路同时接入信道。
可选地，在至少两个链路中存在至少一个链路的第一属性值达到预设值，且其他链路的第一属性值未达到预设值的情况下，维持该至少一个链路的第一属性值为预设值，等待该其他链路的第一属性值达到预设值后，同步基于至少两个链路的信道状态为空闲，将至少两个链路的第一属性值同步减1。
综上所述，本实施例提供的方法，STA MLD或AP MLD在使用EDCA(Enhanced Distributed Channel Access，增强型分布式信道访问)backoff(退避)机制接入信道时，分别对多个链路进行侦听，根据侦听结果记录每个链路的第一属性值，当一个链路的第一属性值达到预设值时，保持这个链路的第一属性值不变，直至其他链路的第一属性值也达到了预设值，然后同时对多个链路进行侦听，根据在多个链路上侦听得到的侦听结果，同步地记录多个链路的多个第一属性值。在如此，可以保证多个链路的第一属性值可以同步地减少至0，以便STA MLD或AP MLD可以通过多个链路发送PPDU(PHY Protocol Data Unit，物理层协议包单元)。
示例性的，给出一种至少两个链路的第一属性值和/或至少两个链路的信道状态满足第一条件的示例性实施例。
请参考图7，其示出了本申请一个实施例提供的多链路通信方法的流程图。该方法可应用于图1所示的通信系统中的任一作为发送端的MLD中，该MLD为站点MLD或接入点MLD。该方法可以包括如下步骤：
步骤510：监测至少两个链路的第一属性值，和/或，至少两个链路的信道状态。
步骤521：在至少两个链路中部分链路的第一属性值达到预设值，且至少两个链路中其他链路的第一属性值未达到预设值的情况下，保持部分链路的第一属性值为预设值不变。
部分链路可以是一个链路也可以是多个链路。其他链路是至少两个链路中除部分链路之外的其他链路。其他链路可以是一个链路也可以是多个链路。
当部分链路为多个链路时，保持该多个链路所对应的多个第一属性值为预设值不变。
示例性的，可以在以下两种情况下，保持部分链路的第一属性值为预设值不变：
1)在至少两个链路中的部分链路的第一属性值达到预设值，且至少两个链路中的其他链路处于IFS时隙检查状态的情况下，保持部分链路的第一属性值为预设值不变。
2)在至少两个链路中的部分链路的第一属性值达到预设值，至少两个链路中的其他链路处于属性值侦测状态，且其他链路的第一属性值未达到预设值的情况下，保持部分链路的第一属性值为预设值不变。
示例性的，保持部分链路的第一属性值为预设值不变，并持续监测其他链路的信道状态。
步骤522：在至少两个链路的第一属性值均达到预设值，且至少两个链路的信道状态均为空闲的情况下，至少两个链路同时接入信道。
示例性的，在至少两个链路的第一属性值均达到预设值，且至少两个链路的信道状态均为空闲的情况下，将至少两个链路的第一属性值同步减1；在至少两个链路的第一属性值均为0后，至少两个链路同时接入信道。
在至少两个链路的第一属性值大于0的情况下，继续监测至少两个链路的信道状态。
在至少两个链路达到预设值之后，在至少两个链路中存在至少一个链路的信道状态为繁忙的情况下，保持至少两个链路的第一属性值不变。
其中，至少两个链路中存在至少一个链路的信道状态为繁忙包括以下三种情况：
1)在至少两个链路中第一部分链路的信道状态为空闲、第二部分链路的信道状态为繁忙的情况下，保持至少两个链路的第一属性值不变，维持至少两个链路处于属性值侦测状态。
2)在至少两个链路中第一部分链路的信道状态为空闲、第二部分链路的信道状态为繁忙的情况下，保持至少两个链路的第一属性值不变，维持第一部分链路处于属性值侦测状态；将第二部分链路重新进入IFS时隙检查状态；在第二部分链路在IFS内信道状态为空闲的情况下，将第二部分链路重新进入属性值侦测状态。
3)在至少两个链路的信道状态均为繁忙的情况下，保持至少两个链路的第一属性值不变，将至少两个链路重新进入IFS时隙检查状态；在至少两个链路在IFS内信道状态为空闲的情况下，将至少两个链路重新进入属性值侦测状态。
示例性的，在至少两个链路的第一属性值均为0后，至少两个链路同时接入信道，包括以下两种情况：
1)在至少两个链路的第一属性值均为0，且第0个退避时隙结束时，至少两个链路同时接入信道；其中，第0个退避时隙为至少两个链路的第一属性值为0所对应的退避时隙。
2)在至少两个链路的第一属性值均为0，且第0个退避时隙内至少两个链路的信道状态均为空闲时，至少两个链路同时接入信道；其中，第0个退避时隙为至少两个链路的第一属性值为0所对应的退避时隙。
综上所述，本实施例提供的方法，STA MLD或AP MLD在使用EDCA(Enhanced Distributed Channel Access，增强型分布式信道访问)backoff(退避)机制接入信道时，分别对多个链路进行侦听，根据侦听结果记录每个链路的第一属性值，当一个链路的第一属性值达到预设值时，保持这个链路的第一属性值不变，直至其他链路的第一属性值也达到了预设值，然后同时对多个链路进行侦听，根据在多个链路上侦听得到的侦听结果，同步地记录多个链路的多个第一属性值。在如此，可以保证多个链路的第一属性值可以同步地减少至0，以便STA MLD或AP MLD可以通过多个链路发送PPDU(PHY Protocol Data Unit，物理层协议包单元)。
示例性的，以站点多链路设备和接入点多链路设备之间的第一链路和第二链路、第一属性值为退避时隙值、属性值侦测状态也可以称为退避时隙值侦测状态为例进行说明。
其中，第一链路可以是上述的至少两个链路中的任意一个链路，第二链路可以是上述的至少两个链路中任意一个不同于第一链路的链路。可选的，第一链路也可以代指上述的至少两个链路中的多个链路，第二链路也可以代指上述至少两个链路中的不同于第一链路的多个链路。
请参考图8，其示出了本申请一个实施例提供的多链路通信方法的流程图。该方法可应用于图1所示的通信系统中的任一作为发送端的MLD中，该MLD为站点MLD或接入点MLD。该方法可以包括如下步骤：
步骤310：在第一链路和第二链路上进行EDCA backoff过程，通过第一链路侦听第一信道，根据第一信道的侦听结果记录第一退避时隙值；通过第二链路侦听第二信道，根据第二信道的侦听结果记录第二退避时隙值。
本申请实施例提供的多链路通信方法应用于多链路场景中，多链路场景下的链路包括：站点MLD和接入点MLD之间的第一链路和第二链路。
示例性的，EDCA backoff包括两个状态(退避状态)：IFS时隙检查状态和退避时隙值侦测状态。进行EDCA backoff的链路先进入IFS时隙检查状态，当在IFS内侦听到信道空闲后，进入退避时隙值侦测状态，根据随机得到的退避时隙值在退避时隙值所指示的至少一个退避时隙内进行侦听，每在一个退避时隙内侦听到信道空闲，则将退避时隙值减1，直至退避时隙值为0，则站点MLD或接入点MLD可以通过链路发送PPDU。
示例性的，在开始侦听之前，MLD(站点MLD或接入点MLD)根据第一PPDU所包含的MPDU(Media Access Control Protocol Data Unit，媒体介入控制协议数据单元)的类型和接入码，确定第一链路的第一IFS和初始的第一退避时隙值。第一PPDU是需要通过第一链路发送的PPDU。站点MLD或接入点MLD根据第二PPDU所包含的MPDU的类型和接入码，确定第二链路的第二IFS和初始的第二退避时隙值。第二PPDU是需要通过第二链路发送的PPDU。
示例性的，MLD根据PPDU所包含的MPDU的类型确定IFS(AIFS)和CW(Contention Window，竞争窗口)，从确定出的CW中随机选择初始的退避时隙值。
则通过第一链路侦听第一信道，根据第一信道的侦听结果记录第一退避时隙值，包括：在第一IFS侦听的时长内通过第一链路侦听第一信道；当在第一IFS的时长内第一信道的侦听结果为空闲，在初始的第一退避时隙值所指示的至少一个退避时隙内继续侦听第一信道；每在一个退避时隙内侦听到第一信道为空闲，则将第一退避时隙值减1。
示例性的，退避时隙值与退避时隙的个数对应，例如，如图9所示，link1/STA1的初始的第一退避时隙值为4，则在侦听到AIFS空闲之后，接下来的第一个时隙即为第一退避时隙值为4所指示的退避时隙，当在第一退避时隙值为4的退避时隙内第一信道的侦听结果为空闲时，将第一退避时隙值减1，下一个时隙即为第一退避值为3所指示的退避时隙，以此类推。
通过第二链路侦听第二信道，根据第二信道的侦听结果记录第二退避时隙值，包括：在第二IFS侦听的时长内通过第二链路侦听第二信道；当在第二IFS的时长内第二信道的侦听结果为空闲，在初始的第二退避时隙值所指示的至少一个退避时隙内继续侦听第二信道；每在一个退避时隙内侦听到第二信道为空闲，则将第二退避时隙值减1。
示例性的，在IFS内进行信道侦听即为EDCA backoff的IFS时隙检查状态；根据退避时隙值在退避时隙内进行信道侦听即为EDCA backoff的退避时隙值侦测状态。
在退避时隙值侦测状态下，若在某个退避时隙内侦听到信道繁忙，则MLD可以保持退避时隙值不变，继续在下一个退避时隙内进行信道侦听。或，MLD可以保持退避时隙值不变，侦听一个IFS后，若在IFS内信道空闲，继续按照之前所保持的退避时隙值进入退避时隙值侦测状态，在下一个退避时隙内进行信道侦听。
步骤320：当第一退避时隙值达到预设值，保持第一退避时隙值为预设值不变。
示例性的，预设值可以为1，也可以为任意的正整数。
若第一链路的第一退避时隙值先达到预设值，则获取第二链路的退避状态，若第二链路处于退避时隙值侦测状态且的第二退避时隙值也达到预设值，则直接执行步骤330。若第二链路处于IFS时隙检查状态，或者第二链路处于退避时隙值侦测状态但是第二退避时隙值没有达到预设值，则保持第一链路的第一退避时隙值为预设值不变。
示例性的，在保持第一退避时隙值不变的过程中，继续对接下来的退避时隙进行信道侦听，只是在侦听到信道空闲后不会再减少第一退避时隙值。若在保持第一退避时隙值不变的过程中，侦听到信道繁忙，则可以继续保持第一退避时隙值为预设值不变，继续侦听下一个退避时隙；或者，可以侦听一个第一IFS，若在一个第一IFS内信道空闲，则继续按照第一退避时隙值为预设值对接下来的退避时隙进行信道侦听。
同理，若是第二链路的第二退避时隙值先达到预设值，则获取第一链路的退避状态，若第一链路没有处于退避时隙值侦测状态且第一退避时隙值为预设值，则保持第二退避时隙值为预设值不变，等待第一链路的第一退避时隙值达到预设值。
本申请实施例中的“第一”和“第二”仅用于区分两个名词，并不是顺序命名，站点MLD和接入点MLD之间的任一链路均可被称为“第一链路”，或被称为“第二链路”。
步骤330：当第一退避时隙值为预设值且第二退避时隙值达到预设值，同时侦听第一信道和第二信道，根据第一信道和第二信道的侦听结果同步记录第一退避时隙值和第二退避时隙值。
当第一退避时隙值和第二退避时隙值都达到预设值后，开始根据两个信道上的两个侦听结果同步记录第一退避时隙值和第二退避时隙值。同步记录是指第一退避时隙值和第二退避时隙值始终保持一样的数值。即，第一退避时隙值减1，则第二退避时隙值也会同时减1；第一退避时隙值保持不变，则第二退避时隙值也会保持不变。
步骤340：在第一退避时隙值和第二退避时隙值为0后，分别通过第一信道和第二信道同时发送PPDU。
根据两个信道的侦听结果同步记录第一退避时隙值和第二退避时隙值，就可以保证第一退避时隙值和第二退避时隙值可以同步减到0，在两个退避时隙值都减到0之后，两个链路就可以接入信道，同时发送PPDU。
示例性的，通过第一链路在第一信道发送第一PPDU，通过第二链路在第二信道发送第二PPDU。
综上所述，本实施例提供的方法，STA MLD或AP MLD在使用EDCA backoff机制接入信道时，分别对多个链路进行侦听，根据侦听结果记录每个链路的退避时隙值，当一个链路的退避时隙值达到预设值时，保持这个链路的退避时隙值不变，直至另一个链路的退避时隙值也达到了预设值，然后同时对多个链路进行侦听，根据在多个链路上侦听得到的侦听结果，同步地记录多个链路的多个退避时隙值，如此，可以保证多个链路的退避时隙值可以同步地减少至0，在多个链路的退避时隙值同时达到0后，STA MLD或AP MLD可以通过多个链路发送PPDU。
示例性的，给出一种同步记录第一退避时隙值和第二退避时隙值的示例性实施例。
请参考图10，其示出了本申请一个实施例提供的多链路通信方法的流程图。该方法可应用于图1所示的通信系统中的任一作为发送端的MLD中，该MLD为站点MLD或接入点MLD。该方法可以包括如下步骤：
步骤310：在第一链路和第二链路上进行EDCA backoff过程，通过第一链路侦听第一信道，根据第一信道的侦听结果记录第一退避时隙值；通过第二链路侦听第二信道，根据第二信道的侦听结果记录第二退避时隙值。
步骤321：当第一退避时隙值达到预设值，获取第二链路的退避状态。
示例性的，第一链路为图7所示的实施例中的部分链路，第二链路为其他链路。即，在至少两个链路中的部分链路(第一链路)的第一属性值(第一退避时隙值)达到预设值，且至少两个链路中的其他链路(第二链路)处于IFS时隙检查状态的情况下，保持部分链路(第一链路)的第一属性值为预设值不变。
退避状态包括IFS时隙检查状态和退避时隙值侦测状态。在IFS时隙检查状态下，MLD在IFS内侦听信道。在退避时隙值侦测状态下，MLD在退避时隙值所指示的退避时隙内侦听信道，并根据侦听结果记录退避时隙值。
示例性的，若第二链路的退避状态为退避时隙值侦测状态，且第二退避时隙值为预设值，则可以跳过步骤322和步骤323直接执行步骤331。
步骤322：当第二链路的退避状态为IFS时隙检查状态，保持第一退避时隙值为预设值不变。
当第二链路的退避状态为IFS时隙检查状态时，第一链路保持第一退避时隙值为预设值不变，等待第二链路进入退避时隙值侦测状态并且第二退避时隙值达到预设值。
例如，预设值为1，如图9所示，link1/STA1的第一退避时隙值在达到1之后，获取link2/STA2的退避状态，此时STA2处于IFS时隙检查状态，则保持STA1的第一退避时隙值为1不变。
示例性的，当第二链路的退避状态为IFS时隙检查状态，保持第一退避时隙值为预设值不变继续侦听接下来的退避时隙，且持续检查第二链路的退避状态。
步骤323：当第二链路的退避状态为退避时隙值侦测状态，且第二退避时隙值未达到预设值，保持第一退避时隙值为预设值不变。
示例性的，当第二链路的退避状态为退避时隙值侦测状态，且第二退避时隙值未达到预设值，保持第一退避时隙值为预设值不变继续侦听接下来的退避时隙，且持续检查第二链路的退避状态。
例如，如图11所示，在第一链路(link1/STA1)的第一退避时隙值达到1之后，第一退避时隙值保持1不变，在第一退避时隙值为1所对应的第4个退避时隙401，获取到的第二链路(link2/STA2)的退避状态为退避时隙值侦测状态，且第二退避时隙值为2，未达到1(backoff slot count>1)，则保持第一退避时隙值为1继续侦听第一信道，并且持续检查第二链路的退避状态。
步骤331：当第一退避时隙值为预设值且第二退避时隙值达到预设值，同时侦听第一信道和第二信道。
同时侦听是指根据第一信道和第二信道的侦听结果同时记录第一退避时隙值和第二退避时隙值，而不是：根据第一信道的侦听结果记录第一退避时隙值、根据第二信道的侦听结果记录第二退避时隙值。
当第一退避时隙值和第二退避时隙值都打到预设值，侦听第一信道和第二信道，根据第一信道和第二信道的侦听结果同步记录第一退避时隙值和第二退避时隙值。
例如，如图12所示，第一链路(link1/STA1)的第一退避时隙值减为1时，第二链路(link2/STA2)处于IFS时隙检查状态，则保持第一退避时隙值为1不变，持续检查第二链路的退避状态，当在退避时隙402侦听到第二信道空闲，将第二退避时隙值减1(由2变为1)，则此时第二退避时隙值和第一退避时隙值都为1，从退避时隙403开始，根据第一信道和第二信道的侦听结果同步记录第一退避时隙值和第二退避时隙值。
步骤332：当第一信道和第二信道的侦听结果均为空闲，将第一退避时隙值和第二退避时隙值减1。
若在接下来的一个退避时隙，第一信道和第二信道的侦听结果都是空闲，则同步地将第一退避时隙值和第二退避时隙值都减1。
示例性的，预设值为n，n为正整数。当在第一退避时隙值和第二退避时隙值为i时，侦听到第一信道和第二信道的侦听结果均为空闲，将第一退避时隙值和第二退避时隙值减1，则第一退避时隙值和第二退避时隙值变为i-1，i为不大于n的正整数。
示例性的，当预设值为1时，当第一信道和第二信道的侦听结果均为空闲，将第一退避时隙值和第二退避时隙值减1，则第一退避时隙值和第二退避时隙值为0。
例如，如图12所示，在退避时隙403侦听到第一信道和第二信道为空闲，则将第一退避时隙值和第二退避时隙值从1变为0，若在0所对应的退避时隙404侦听到第一信道和第二信道为空闲，则可以在第 一信道和第二信道上发送UL PPDU。
示例性的，在步骤332之后，当第一退避时隙值和第二退避时隙值不为0，继续在第一退避时隙值和第二退避时隙值为i-1时侦听第一信道和第二信道，根据在第一信道和第二信道的侦听结果同步记录第一退避时隙值和第二退避时隙值。即，若第一退避时隙值和第二退避时隙值不为0，则继续在i-1对应的退避时隙侦听第一信道和第二信道，继续根据侦听结果同步记录第一退避时隙值和第二退避时隙值。
步骤333：当第一信道和第二信道中存在至少一个信道的侦听结果为繁忙，保持第一退避时隙值和第二退避时隙值不变。
示例性的，预设值为n，n为正整数。当在第一退避时隙值和第二退避时隙值为i时，侦听到第一信道和第二信道中存在至少一个信道的侦听结果为繁忙，保持第一退避时隙值和第二退避时隙值为i不变。
即，当第一退避时隙值和第二退避时隙值为i时，在i对应的退避时隙侦听到第一信道和第二信道中存在至少一个信道为繁忙，则保持第一退避时隙值和第二退避时隙值为i不变。
在保持第一退避时隙值和第二退避时隙值为i不变后，可以采用以下两种方式中的一种继续侦听第一信道和第二信道：
方式1：继续维持退避时隙值侦测状态，按照第一退避时隙值和第二退避时隙值为i继续侦听下一个退避时隙。
方式2：信道为空闲的链路继续保持退避时隙值侦测状态，按照退避时隙值不变(为i)继续侦听信道；信道为繁忙的链路则重新进入IFS时隙检查状态，在一个IFS内侦听信道是否空闲，在信道空闲后重新进入退避时隙值侦测状态，按照退避时隙值为i继续侦听信道。若两个退避时隙值同为i，则根据侦听结果同步记录两个退避时隙值。
示例性的，第一信道和第二信道存在至少一个信道的侦听结果为繁忙包括以下三种情况：
情况1：第一信道为繁忙，第二信道为空闲。
情况2：第一信道为空闲，第二信道为繁忙。
情况3：第一信道和第二信道都为繁忙。
针对上述的两种方式和三种情况，本申请提供了以下几个实施例对步骤333进行说明。
一、情况1/情况2/情况3+方式1。
将第一链路和第二链路保持在退避时隙值侦测状态，继续按照第一退避时隙值和第二退避时隙值为i同步侦听第一信道和第二信道，根据在第一信道和第二信道的侦听结果同步记录第一退避时隙值和第二退避时隙值。
即，无论两个信道中哪个信道为繁忙，都将两个链路维持在退避时隙值侦测状态，按照退避时隙值不变继续同步侦听第一信道和第二信道。
例如，如图13所示，在第一退避时隙值和第二退避时隙值都达到1之后，在1所对应的退避时隙405侦听到第二信道为繁忙、第一信道为空闲，则保持第一退避时隙值和第二退避时隙值为1不变，继续在退避时隙406按照第一退避时隙值和第二退避值为1侦听第一信道和第二信道。若在退避时隙406侦听到第一信道和第二信道为空闲，则将第一退避时隙值和第二退避时隙值减为0。
再如，如图14所示，在第一退避时隙值和第二退避时隙值都达到1之后，在1所对应的退避时隙405侦听到第一信道为繁忙、第二信道为空闲，则保持第一退避时隙值和第二退避时隙值为1不变，继续在退避时隙406按照第一退避时隙值和第二退避值为1侦听第一信道和第二信道。如图15所示，若在退避时隙406侦听到第一信道和第二信道为空闲，则将第一退避时隙值和第二退避时隙值减为0。并在退避时隙值为0对应的退避时隙结束后，接入信道发送PPDU。
二、情况1+方式2。
当在第一退避时隙值和第二退避时隙值为i时，侦听到第一信道的侦听结果为繁忙、第二信道的侦听结果为空闲，将第二链路保持在退避时隙值侦测状态；将第一链路重新进入IFS时隙检查状态，在第一IFS内通过第一链路侦听第一信道；
当在第一IFS内第一信道的侦听结果为空闲，继续按照第一退避时隙值和第二退避时隙值为i同步侦听第一信道和第二信道，根据在第一信道和第二信道的侦听结果同步记录第一退避时隙值和第二退避时隙值。
例如，如图16所示，在第一退避时隙值和第二退避时隙值都为1时，在1对应的退避时隙407内侦听到第一信道为繁忙、第二信道为空闲，则第二链路(link2/STA2)按照第二退避时隙值为1不变保持退避时隙值侦测状态，第一链路(link1/STA1)重新进入IFS时隙检查状态。第一链路在IFS内侦听到第二信道为空闲后，重新按照第一退避时隙值为1进入退避时隙值侦测状态，从退避时隙408开始，继续同步侦听第一信道和第二信道，根据侦听结果同步记录第一退避时隙值和第二退避时隙值。
示例性的，在第一链路进入IFS时隙检查状态，第二链路保持退避时隙值侦测状态时，若在在第二链 路上侦听到第二信道繁忙，则第二链路可以保持第二退避时隙值不变继续维持退避时隙值侦测状态；第二链路也可以重新进入IFS时隙检查状态，在IFS内侦听到信道空闲后，重新进入退避时隙值侦测状态(第二退避时隙值不变(为1))。
三、情况2+方式2。
当在第一退避时隙值和第二退避时隙值为i时，侦听到第一信道的侦听结果为空闲、第二信道的侦听结果为繁忙，将第一链路保持在退避时隙值侦测状态；将第二链路重新进入IFS时隙检查状态，在第二IFS内通过第二链路侦听第二信道；
当在第二IFS内第二信道的侦听结果为空闲，继续按照第一退避时隙值和第二退避时隙值为i同步侦听第一信道和第二信道，根据在第一信道和第二信道的侦听结果同步记录第一退避时隙值和第二退避时隙值。
例如，如图17所示，在第一退避时隙值和第二退避时隙值都为1时，在1对应的退避时隙407内侦听到第一信道为空闲、第二信道为繁忙，则第一链路(link1/STA1)按照第一退避时隙值为1不变保持退避时隙值侦测状态，第二链路(link2/STA2)重新进入IFS时隙检查状态。第二链路在IFS内侦听到第二信道为空闲后，重新按照第二退避时隙值为1进入退避时隙值侦测状态，从退避时隙408开始，继续同步侦听第一信道和第二信道，根据侦听结果同步记录第一退避时隙值和第二退避时隙值。
示例性的，在第二链路进入IFS时隙检查状态，第一链路保持退避时隙值侦测状态时，若在在第一链路上侦听到第一信道繁忙，则第一链路可以保持第一退避时隙值不变继续维持退避时隙值侦测状态；第一链路也可以重新进入IFS时隙检查状态，在IFS内侦听到信道空闲后，重新进入退避时隙值侦测状态(第一退避时隙值不变(为1))。
四、情况3+方式2。
由于IFS是根据PPDU中的MPDU的类型和AC确定的，不同链路发送的PPDU不同，则IFS也不同。当两个信道都繁忙后，两个链路都进入IFS时隙检查状态，由于两个链路的IFS可能不同，两个链路IFS时隙检查状态结束的时间也会不同，因此，本实施例将其分为两种情况进行说明：
1、第一链路先进入退避时隙值侦测状态。
当在第一退避时隙值和第二退避时隙值为i时，侦听到第一信道和第二信道的侦听结果均为繁忙，将第一链路和第二链路重新进入IFS时隙检查状态，在第一IFS内通过第一链路侦听第一信道，在第二IFS内通过第二链路侦听第二信道；
当在第一IFS内第一信道的侦听结果为空闲，将第一链路进入退避时隙值侦测状态，保持第一退避时隙值为i侦听第一信道。在一种可选的实施例中，当在第一IFS内第一信道的侦听结果为空闲，将第一链路进入退避时隙值侦测状态，获取第二链路的退避状态，当第二链路的退避状态为IFS时隙检查状态，保持第一退避时隙值为i继续侦听第一信道。
当第二IFS内第二信道的侦听结果为空闲，继续按照第一退避时隙值和第二退避时隙值为i同步侦听第一信道和第二信道，根据在第一信道和第二信道的侦听结果同步记录第一退避时隙值和第二退避时隙值。
例如，如图18所示，在第一退避时隙值和第二退避时隙值都为1时，在1对应的退避时隙407内侦听到第一信道和第二信道均为繁忙，则第一链路(link1/STA1)和第二链路(link2/STA2)重新进入IFS时隙检查状态。假设，第一链路的第一IFS时长短于第二链路的第二IFS，则第一链路首先结束IFS时隙检查状态。第一链路在IFS内侦听到第一信道为空闲后，重新按照第一退避时隙值为1进入退避时隙值侦测状态，并获取第二链路的退避状态，此时第二链路还处于IFS时隙检查状态，则第一链路保持第一退避时隙值为1等待第二链路也按照第二退避时隙值为1重新进入退避时隙值侦测状态。当第二链路在第二IFS内侦听到第二信道为空闲，重新按照第二退避时隙值为1进入退避时隙值侦测状态，则从退避时隙409开始，继续同步侦听第一信道和第二信道，根据侦听结果同步记录第一退避时隙值和第二退避时隙值。
2、第二链路先进入退避时隙值侦测状态。
当在第一退避时隙值和第二退避时隙值为i时，侦听到第一信道和第二信道的侦听结果均为繁忙，将第一链路和第二链路重新进入IFS时隙检查状态，在第一IFS内通过第一链路侦听第一信道，在第二IFS内通过第二链路侦听第二信道；
当在第二IFS内第二信道的侦听结果为空闲，将第二链路进入退避时隙值侦测状态，保持第二退避时隙值为i侦听第二信道；在一种可选的实施例中，当在第二IFS内第二信道的侦听结果为空闲，将第二链路进入退避时隙值侦测状态，获取第一链路的退避状态，当第一链路的退避状态为IFS时隙检查状态，保持第二退避时隙值为i继续侦听第二信道。
当第一IFS内第一信道的侦听结果为空闲，继续按照第一退避时隙值和第二退避时隙值为i同步侦听第一信道和第二信道，根据在第一信道和第二信道的侦听结果同步记录第一退避时隙值和第二退避时隙值。
例如，如图19所示，在第一退避时隙值和第二退避时隙值都为1时，在1对应的退避时隙407内侦 听到第一信道和第二信道均为繁忙，则第一链路(link1/STA1)和第二链路(link2/STA2)重新进入IFS时隙检查状态。假设，第一链路的第一IFS时长长于第二链路的第二IFS，则第二链路首先结束IFS时隙检查状态。第二链路在IFS内侦听到第二信道为空闲后，重新按照第二退避时隙值为1进入退避时隙值侦测状态，并获取第一链路的退避状态，此时第一链路还处于IFS时隙检查状态，则第二链路保持第二退避时隙值为1等待第一链路也按照第一退避时隙值为1重新进入退避时隙值侦测状态。当第一链路在第一IFS内侦听到第一信道为空闲，重新按照第一退避时隙值为1进入退避时隙值侦测状态，则从退避时隙409开始，继续同步侦听第一信道和第二信道，根据侦听结果同步记录第一退避时隙值和第二退避时隙值。
3、第二链路和第一链路同时进入退避时隙值侦测状态。
当在第一退避时隙值和第二退避时隙值为i时，侦听到第一信道和第二信道的侦听结果均为繁忙，将第一链路和第二链路重新进入IFS时隙检查状态，在第一IFS内通过第一链路侦听第一信道，在第二IFS内通过第二链路侦听第二信道；
当在第二IFS内第二信道的侦听结果为空闲，在第一IFS内第一信道的侦听结果为空闲，将第一链路和第二链路进入退避时隙值侦测状态，继续按照第一退避时隙值和第二退避时隙值为i同步侦听第一信道和第二信道，根据在第一信道和第二信道的侦听结果同步记录第一退避时隙值和第二退避时隙值。
步骤340：在第一退避时隙值和第二退避时隙值为0后，分别通过第一信道和第二信道同时发送PPDU。
示例性的，MLD可以在第一退避时隙值和第二退避时隙值减为0，且在0对应的退避时隙结束时，通过第一信道和第二信道发送PPDU。即，当在第一退避时隙值和第二退避时隙值减为0，且第0个退避时隙结束时，分别通过第一信道和第二信道同时发送PPDU；第0个退避时隙为第一退避时隙值和第二退避时隙值为0所对应的退避时隙。
例如，如图20所示，在第一退避时隙值和第二退避时隙值为1所对应的退避时隙410，侦听到第一信道和第二信道为空闲，则第一退避时隙值和第二退避时隙值减为0，则在退避时隙值为0所对应的退避时隙411结束后，第一链路和第二链路可以分别在第一信道和第二信道上发送PPDU。
示例性的，MLD也可以在第一退避时隙值和第二退避时隙值减为0，且在0对应的退避时隙内侦听到第一信道和第二信道为空闲时，通过第一信道和第二信道发送PPDU。即，当第一退避时隙值和第二退避时隙值减为0，且在第0个退避时隙内第一信道和第二信道的侦听结果均为空闲，分别通过第一信道和第二信道同时发送PPDU；第0个退避时隙为第一退避时隙值和第二退避时隙值为0所对应的退避时隙。
例如，如图21所示，在第一退避时隙值和第二退避时隙值为1所对应的退避时隙410，侦听到第一信道和第二信道为空闲，则第一退避时隙值和第二退避时隙值减为0，然后继续在第一退避时隙值和第二退避时隙值为0所对应的退避时隙411侦听第一信道和第二信道，当在退避时隙411侦听到第一信道和第二信道为空闲，则在退避时隙411结束后第一链路和第二链路可以分别在第一信道和第二信道上发送PPDU。
需要说明的是，若在退避时隙值为0对应的退避时隙内侦听到第一信道和第二信道中存在至少一个信道为繁忙，则可以保持第一退避时隙值和第二退避时隙值为0继续在下一个退避时隙内侦听第一信道和第二信道，若两个信道都为空闲，则在两个信道上发送PPDU。
综上所述，本实施例提供的方法，满足了IEEE 802.11协议中的要求，在NSTR links上仍然各自进行EDCA backoff过程。该方法可以使NSTR STA MLD有更多机会和概率使得两个NSTR links上同时满足接入信道的条件，并将两个NSTR links上的发送PPDU Start Time对齐在一起。
下述为本申请装置实施例，可以用于执行本申请方法实施例。对于本申请装置实施例中未披露的细节，请参照本申请方法实施例。
请参考图22，其示出了本申请一个实施例提供的多链路通信装置的框图。该装置具有实现上述方法示例的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该装置可以是上文介绍的作为接收端的多链路设备，也可以设置在作为发送端的多链路设备中，该多链路设备是站点MLD或接入点MLD。所述多链路包括：所述站点多链路设备和接入点多链路设备之间的至少两个链路，所述装置包括：
监测模块801，用于监测所述至少两个链路的第一属性值，和/或，所述至少两个链路的信道状态；
接入模块802，用于在所述至少两个链路的第一属性值和/或所述至少两个链路的信道状态满足第一条件的情况下，所述至少两个链路同时接入信道。
在一个可选的实施例中，所述接入模块802，用于在所述至少两个链路中部分链路的第一属性值达到预设值，且所述至少两个链路中其他链路的第一属性值未达到所述预设值的情况下，保持所述部分链路的第一属性值为所述预设值不变；
所述接入模块802，用于在所述至少两个链路的第一属性值均达到所述预设值，且所述至少两个链路的信道状态均为空闲的情况下，所述至少两个链路同时接入信道。
在一个可选的实施例中，所述接入模块802，用于在所述至少两个链路中的所述部分链路的第一属性值达到预设值，且所述至少两个链路中的所述其他链路处于帧间间隔IFS时隙检查状态的情况下，保持所述部分链路的第一属性值为所述预设值不变。
在一个可选的实施例中，所述接入模块802，用于在所述至少两个链路中的所述部分链路的第一属性值达到预设值，所述至少两个链路中的所述其他链路处于属性值侦测状态，且所述其他链路的第一属性值未达到所述预设值的情况下，保持所述部分链路的第一属性值为所述预设值不变。
在一个可选的实施例中，所述接入模块802，用于在所述至少两个链路的第一属性值均达到所述预设值，且所述至少两个链路的信道状态均为空闲的情况下，将所述至少两个链路的第一属性值同步减1；
所述接入模块802，用于在所述至少两个链路的第一属性值均为0后，所述至少两个链路同时接入信道。
在一个可选的实施例中，所述监测模块801，用于在所述至少两个链路的第一属性值大于0的情况下，继续监测所述至少两个链路的信道状态。
在一个可选的实施例中，所述监测模块801，用于在所述至少两个链路中存在至少一个链路的信道状态为繁忙的情况下，保持所述至少两个链路的第一属性值不变。
在一个可选的实施例中，所述监测模块801，用于在所述至少两个链路中第一部分链路的信道状态为空闲、第二部分链路的信道状态为繁忙的情况下，保持所述至少两个链路的第一属性值不变，维持所述至少两个链路处于属性值侦测状态。
在一个可选的实施例中，所述监测模块801，用于在所述至少两个链路中第一部分链路的信道状态为空闲、第二部分链路的信道状态为繁忙的情况下，保持所述至少两个链路的第一属性值不变，维持所述第一部分链路处于属性值侦测状态；将所述第二部分链路重新进入IFS时隙检查状态；
所述监测模块801，用于在所述第二部分链路在IFS内信道状态为空闲的情况下，将所述第二部分链路重新进入所述属性值侦测状态。
在一个可选的实施例中，所述监测模块801，用于在所述至少两个链路的信道状态均为繁忙的情况下，保持所述至少两个链路的第一属性值不变，将所述至少两个链路重新进入IFS时隙检查状态；
所述监测模块801，用于在所述至少两个链路在IFS内信道状态为空闲的情况下，将所述至少两个链路重新进入所述属性值侦测状态。
在一个可选的实施例中，所述接入模块802，用于在所述至少两个链路的第一属性值均为0，且第0个退避时隙结束时，所述至少两个链路同时接入信道；
其中，所述第0个退避时隙为所述至少两个链路的第一属性值为0所对应的退避时隙。
在一个可选的实施例中，所述接入模块802，用于在所述至少两个链路的第一属性值均为0，且第0个退避时隙内所述至少两个链路的信道状态均为空闲时，所述至少两个链路同时接入信道；
其中，所述第0个退避时隙为所述至少两个链路的第一属性值为0所对应的退避时隙。
在一个可选的实施例中，所述预设值包括1。
在一个可选的实施例中，所述第一属性值包括退避时隙值。
在一个可选的实施例中，所述信道状态包括空闲和繁忙。
需要说明的一点是，上述实施例提供的装置在实现其功能时，仅以上述各个功能模块的划分进行举例说明，实际应用中，可以根据实际需要而将上述功能分配由不同的功能模块完成，即将设备的内容结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
关于上述实施例中的装置，其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述，此处将不做详细阐述说明。
请参考图23，其示出了本申请一个实施例提供的多链路设备的结构示意图。该多链路设备可以包括：处理器1101、接收器1102、发射器1103、存储器1104和总线1105。
处理器1101包括一个或者一个以上处理核心，处理器1101通过运行软件程序以及模块，从而执行各种功能应用以及多链路通信。
接收器1102和发射器1103可以实现为一个收发器1106，该收发器1106可以是一块通信芯片。
存储器1104通过总线1105与处理器1101相连。
存储器1104可用于存储计算机程序，处理器1101用于执行该计算机程序，以实现上述方法实施例中终端设备执行的各个步骤。
此外，存储器1104可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，易失性或非易失性存储设备包括但不限于：随机存储器(Random-Access Memory，RAM)和只读存储器(Read-Only Memory，ROM)、可擦写可编程只读存储器(Erasable Programmable Read-Only Memory，EPROM)、电可 擦写可编程只读存储器(Electrically Erasable Programmable Read-Only Memory，EEPROM)、闪存或其他固态存储其技术，只读光盘(Compact Disc Read-Only Memory，CD-ROM)、高密度数字视频光盘(Digital Video Disc，DVD)或其他光学存储、磁带盒、磁带、磁盘存储或其他磁性存储设备。
本申请实施例涉及的处理器和收发器，可以执行上述图6、图7、图8、图10任一所示的方法中，由多链路设备执行的步骤，此处不再赘述。
本申请实施例还提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于被多链路设备的处理器执行，以实现上述多链路通信方法。
可选地，该计算机可读存储介质可以包括：只读存储器(Read-Only Memory，ROM)、随机存储器(Random-Access Memory，RAM)、固态硬盘(Solid State Drives，SSD)或光盘等。其中，随机存取记忆体可以包括电阻式随机存取记忆体(Resistance Random Access Memory，ReRAM)和动态随机存取存储器(Dynamic Random Access Memory，DRAM)。
本申请实施例还提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片在多链路设备上运行时，用于实现上述多链路通信方法。
本申请实施例还提供了一种计算机程序产品或计算机程序，所述计算机程序产品或计算机程序包括计算机指令，所述计算机指令存储在计算机可读存储介质中，多链路设备的处理器从所述计算机可读存储介质读取并执行所述计算机指令，以实现上述多链路通信方法。
本申请实施例中的处理器包括：专用集成电路(Application Specific Integrated Circuit，ASIC)。
应理解，在本申请的实施例中提到的“指示”可以是直接指示，也可以是间接指示，还可以是表示具有关联关系。举例说明，A指示B，可以表示A直接指示B，例如B可以通过A获取；也可以表示A间接指示B，例如A指示C，B可以通过C获取；还可以表示A和B之间具有关联关系。
在本申请实施例的描述中，术语“对应”可表示两者之间具有直接对应或间接对应的关系，也可以表示两者之间具有关联关系，也可以是指示与被指示、配置与被配置等关系。
在本文中提及的“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
另外，本文中描述的步骤编号，仅示例性示出了步骤间的一种可能的执行先后顺序，在一些其它实施例中，上述步骤也可以不按照编号顺序来执行，如两个不同编号的步骤同时执行，或者两个不同编号的步骤按照与图示相反的顺序执行，本申请实施例对此不作限定。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请实施例所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述仅为本申请的示例性实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (34)

  1. 一种多链路通信方法，其特征在于，所述方法由站点多链路设备或接入点多链路设备执行，所述多链路包括：所述站点多链路设备和所述接入点多链路设备之间的至少两个链路，所述方法包括：
    监测所述至少两个链路的第一属性值，和/或，所述至少两个链路的信道状态；
    在所述至少两个链路的第一属性值和/或所述至少两个链路的信道状态满足第一条件的情况下，所述至少两个链路同时接入信道。
  2. 根据权利要求1所述的方法，其特征在于，所述在所述至少两个链路的第一属性值和/或所述至少两个链路的信道状态满足第一条件的情况下，所述至少两个链路同时接入信道，包括：
    在所述至少两个链路中部分链路的第一属性值达到预设值，且所述至少两个链路中其他链路的第一属性值未达到所述预设值的情况下，保持所述部分链路的第一属性值为所述预设值不变；
    在所述至少两个链路的第一属性值均达到所述预设值，且所述至少两个链路的信道状态均为空闲的情况下，所述至少两个链路同时接入信道。
  3. 根据权利要求2所述的方法，其特征在于，所述在所述至少两个链路中部分链路的第一属性值达到预设值，且所述至少两个链路中其他链路的第一属性值未达到所述预设值的情况下，保持所述部分链路的第一属性值为所述预设值不变，包括：
    在所述至少两个链路中的所述部分链路的第一属性值达到预设值，且所述至少两个链路中的所述其他链路处于帧间间隔IFS时隙检查状态的情况下，保持所述部分链路的第一属性值为所述预设值不变。
  4. 根据权利要求2所述的方法，其特征在于，所述在所述至少两个链路中部分链路的第一属性值达到预设值，且所述至少两个链路中其他链路的第一属性值未达到所述预设值的情况下，保持所述部分链路的第一属性值为所述预设值不变，包括：
    在所述至少两个链路中的所述部分链路的第一属性值达到预设值，所述至少两个链路中的所述其他链路处于属性值侦测状态，且所述其他链路的第一属性值未达到所述预设值的情况下，保持所述部分链路的第一属性值为所述预设值不变。
  5. 根据权利要求2至4任一所述的方法，其特征在于，所述在所述至少两个链路的第一属性值均达到所述预设值，且所述至少两个链路的信道状态均为空闲的情况下，所述至少两个链路同时接入信道，包括：
    在所述至少两个链路的第一属性值均达到所述预设值，且所述至少两个链路的信道状态均为空闲的情况下，将所述至少两个链路的第一属性值同步减1；
    在所述至少两个链路的第一属性值均为0后，所述至少两个链路同时接入信道。
  6. 根据权利要求5所述的方法，其特征在于，所述方法还包括：
    在所述至少两个链路的第一属性值大于0的情况下，继续监测所述至少两个链路的信道状态。
  7. 根据权利要求5所述的方法，其特征在于，所述方法还包括：
    在所述至少两个链路中存在至少一个链路的信道状态为繁忙的情况下，保持所述至少两个链路的第一属性值不变。
  8. 根据权利要求7所述的方法，其特征在于，所述在所述至少两个链路中存在至少一个链路的信道状态为繁忙的情况下，保持所述至少两个链路的第一属性值不变，包括：
    在所述至少两个链路中第一部分链路的信道状态为空闲、第二部分链路的信道状态为繁忙的情况下，保持所述至少两个链路的第一属性值不变，维持所述至少两个链路处于属性值侦测状态。
  9. 根据权利要求7所述的方法，其特征在于，所述在所述至少两个链路中存在至少一个链路的信道状态为繁忙的情况下，保持所述至少两个链路的第一属性值不变，包括：
    在所述至少两个链路中第一部分链路的信道状态为空闲、第二部分链路的信道状态为繁忙的情况下，保持所述至少两个链路的第一属性值不变，维持所述第一部分链路处于属性值侦测状态；将所述第二部分链路重新进入IFS时隙检查状态；
    在所述第二部分链路在IFS内信道状态为空闲的情况下，将所述第二部分链路重新进入所述属性值侦测状态。
  10. 根据权利要求7所述的方法，其特征在于，所述在所述至少两个链路中存在至少一个链路的信道状态为繁忙的情况下，保持所述至少两个链路的第一属性值不变，包括：
    在所述至少两个链路的信道状态均为繁忙的情况下，保持所述至少两个链路的第一属性值不变，将所述至少两个链路重新进入IFS时隙检查状态；
    在所述至少两个链路在IFS内信道状态为空闲的情况下，将所述至少两个链路重新进入所述属性值侦测状态。
  11. 根据权利要求5所述的方法，其特征在于，所述在所述至少两个链路的第一属性值均为0后，所述至少两个链路同时接入信道，包括：
    在所述至少两个链路的第一属性值均为0，且第0个退避时隙结束时，所述至少两个链路同时接入信道；
    其中，所述第0个退避时隙为所述至少两个链路的第一属性值为0所对应的退避时隙。
  12. 根据权利要求5所述的方法，其特征在于，所述在所述至少两个链路的第一属性值均为0后，所述至少两个链路同时接入信道，包括：
    在所述至少两个链路的第一属性值均为0，且第0个退避时隙内所述至少两个链路的信道状态均为空闲时，所述至少两个链路同时接入信道；
    其中，所述第0个退避时隙为所述至少两个链路的第一属性值为0所对应的退避时隙。
  13. 根据权利要求2至4任一所述的方法，其特征在于，所述预设值包括1。
  14. 根据权利要求1至4任一所述的方法，其特征在于，所述第一属性值包括退避时隙值。
  15. 根据权利要求1至4任一所述的方法，其特征在于，所述信道状态包括空闲和繁忙。
  16. 一种多链路通信装置，其特征在于，所述多链路包括：所述站点多链路设备和接入点多链路设备之间的至少两个链路，所述装置包括：
    监测模块，用于监测所述至少两个链路的第一属性值，和/或，所述至少两个链路的信道状态；
    接入模块，用于在所述至少两个链路的第一属性值和/或所述至少两个链路的信道状态满足第一条件的情况下，所述至少两个链路同时接入信道。
  17. 根据权利要求16所述的装置，其特征在于，
    所述接入模块，用于在所述至少两个链路中部分链路的第一属性值达到预设值，且所述至少两个链路中其他链路的第一属性值未达到所述预设值的情况下，保持所述部分链路的第一属性值为所述预设值不变；
    所述接入模块，用于在所述至少两个链路的第一属性值均达到所述预设值，且所述至少两个链路的信道状态均为空闲的情况下，所述至少两个链路同时接入信道。
  18. 根据权利要求17所述的装置，其特征在于，所述接入模块，用于在所述至少两个链路中的所述部分链路的第一属性值达到预设值，且所述至少两个链路中的所述其他链路处于帧间间隔IFS时隙检查状态的情况下，保持所述部分链路的第一属性值为所述预设值不变。
  19. 根据权利要求17所述的装置，其特征在于，所述接入模块，用于在所述至少两个链路中的所述部分链路的第一属性值达到预设值，所述至少两个链路中的所述其他链路处于属性值侦测状态，且所述其他链路的第一属性值未达到所述预设值的情况下，保持所述部分链路的第一属性值为所述预设值不变。
  20. 根据权利要求17至19任一所述的装置，其特征在于，所述接入模块，用于在所述至少两个链路的第一属性值均达到所述预设值，且所述至少两个链路的信道状态均为空闲的情况下，将所述至少两个链路的第一属性值同步减1；
    所述接入模块，用于在所述至少两个链路的第一属性值均为0后，所述至少两个链路同时接入信道。
  21. 根据权利要求20所述的装置，其特征在于，
    所述监测模块，用于在所述至少两个链路的第一属性值大于0的情况下，继续监测所述至少两个链路 的信道状态。
  22. 根据权利要求20所述的装置，其特征在于，
    所述监测模块，用于在所述至少两个链路中存在至少一个链路的信道状态为繁忙的情况下，保持所述至少两个链路的第一属性值不变。
  23. 根据权利要求22所述的装置，其特征在于，所述监测模块，用于在所述至少两个链路中第一部分链路的信道状态为空闲、第二部分链路的信道状态为繁忙的情况下，保持所述至少两个链路的第一属性值不变，维持所述至少两个链路处于属性值侦测状态。
  24. 根据权利要求22所述的装置，其特征在于，所述监测模块，用于在所述至少两个链路中第一部分链路的信道状态为空闲、第二部分链路的信道状态为繁忙的情况下，保持所述至少两个链路的第一属性值不变，维持所述第一部分链路处于属性值侦测状态；将所述第二部分链路重新进入IFS时隙检查状态；
    所述监测模块，用于在所述第二部分链路在IFS内信道状态为空闲的情况下，将所述第二部分链路重新进入所述属性值侦测状态。
  25. 根据权利要求22所述的装置，其特征在于，所述监测模块，用于在所述至少两个链路的信道状态均为繁忙的情况下，保持所述至少两个链路的第一属性值不变，将所述至少两个链路重新进入IFS时隙检查状态；
    所述监测模块，用于在所述至少两个链路在IFS内信道状态为空闲的情况下，将所述至少两个链路重新进入所述属性值侦测状态。
  26. 根据权利要求20所述的装置，其特征在于，所述接入模块，用于在所述至少两个链路的第一属性值均为0，且第0个退避时隙结束时，所述至少两个链路同时接入信道；
    其中，所述第0个退避时隙为所述至少两个链路的第一属性值为0所对应的退避时隙。
  27. 根据权利要求20所述的装置，其特征在于，所述接入模块，用于在所述至少两个链路的第一属性值均为0，且第0个退避时隙内所述至少两个链路的信道状态均为空闲时，所述至少两个链路同时接入信道；
    其中，所述第0个退避时隙为所述至少两个链路的第一属性值为0所对应的退避时隙。
  28. 根据权利要求17至19任一所述的装置，其特征在于，所述预设值包括1。
  29. 根据权利要求16至19任一所述的装置，其特征在于，所述第一属性值包括退避时隙值。
  30. 根据权利要求16至19任一所述的装置，其特征在于，所述信道状态包括空闲和繁忙。
  31. 一种多链路设备，其特征在于，所述多链路设备包括处理器；
    所述处理器，用于监测所述至少两个链路的第一属性值，和/或，所述至少两个链路的信道状态；
    所述处理器，用于在所述至少两个链路的第一属性值和/或所述至少两个链路的信道状态满足第一条件的情况下，所述至少两个链路同时接入信道。
  32. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序，所述计算机程序用于被处理器执行，以实现如权利要求1至15任一项所述的多链路通信方法。
  33. 一种芯片，其特征在于，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片运行时，用于实现如权利要求1至15任一项所述的多链路通信方法。
  34. 一种计算机程序产品或计算机程序，其特征在于，所述计算机程序产品或计算机程序包括计算机指令，所述计算机指令存储在计算机可读存储介质中，处理器从所述计算机可读存储介质读取并执行所述计算机指令，以实现如权利要求1至15任一项所述的多链路通信方法。
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