CN115551109A

CN115551109A - Wireless communication method, device and wireless distributed system

Info

Publication number: CN115551109A
Application number: CN202110729082.3A
Authority: CN
Inventors: 陈云曼; 吴伟民; 甘爽
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-12-30
Also published as: WO2023274013A1

Abstract

The application discloses a wireless communication method, which is applied to the field of wireless communication. The method comprises the following steps: the target AP receives first traffic information from the first AP. The first traffic information includes first queue size information of first to-be-transmitted data of the first AP. And the target AP acquires target traffic information. The target traffic information includes target queue size information of target data to be sent of the target AP. And the target AP obtains a first time period and a target time period according to the first queue size information and the target queue size information. The first time period and the target time period are different. The first AP sends first data to be sent in a first time period. And the target AP sends target data to be sent in a target time period. In the application, by allocating different time periods to the target AP and the first AP, the probability of collision between the first AP and the target AP can be reduced, and thus the communication efficiency is improved.

Description

Wireless communication method, device and wireless distributed system

Technical Field

The present application relates to the field of wireless communications, and in particular, to a Wireless Distribution System (WDS) and a wireless communication method and apparatus.

Background

In the field of wireless communication, a plurality of APs can be established as a WDS through frame inter-assembly. In the WDS, APs access a medium in a distributed contention manner, and an AP contending for a transmission opportunity (TXOP) can send data. The distributed contention mode includes a Distributed Coordination Function (DCF) or an enhanced distributed access (EDCA) mechanism. In a carrier sense multiple access with collision avoidance (CSMA/CA) access rule used by EDCA or DCF, an AP first waits for a distributed inter-frame space (DIFS) duration inter-frame slot. During this time, the AP listens to the Channel through a Clear Channel Assessment (CCA) mechanism. When the channel is busy, the AP considers that there are other devices occupying the channel, and the transmission flow is suspended. And if the channel is in an idle state currently, entering a binary rollback stage. The AP randomly selects a value from the Contention Window (Contention Window) and then starts the back-off process. Every slot (slot time) the AP decrements this value by 1 and listens to the channel. If the channel goes busy, the AP stops back-off and saves this value. And when the channel is idle, the AP continues to carry out rollback. If the channel is still idle, backoff continues until this value falls back to 0. At this time, the AP considers that the channel is contended, and starts data transmission.

However, in the CSMA/CA access mechanism, the values of a plurality of APs may fall back to 0 at the same time. At this time, a plurality of APs transmit data simultaneously. Therefore, the plurality of APs interfere with each other, resulting in failure of data transmission, which makes the communication efficiency of the WDS low.

Disclosure of Invention

The application provides a wireless communication method, a wireless communication device and a WDS, wherein different time periods are allocated to a target AP and a first AP, so that the probability of conflict between the first AP and the target AP can be reduced, and the communication efficiency is improved.

A first aspect of the present application provides a method of wireless communication. The wireless communication method includes: the target AP receives first traffic information from the first AP. The first traffic information includes first queue size information of first to-be-transmitted data of the first AP. And the target AP acquires target traffic information. The target traffic information includes target queue size information of target data to be sent of the target AP. And the target AP obtains a first time period and a target time period according to the first queue size information and the target queue size information. There is no overlapping period of time between the first period of time and the target period of time, i.e., the first period of time and the target period of time are different. The target AP sends information of the first time period to the first AP. The information of the first time period is used for the first AP to send the first data to be sent in the first time period. And the target AP sends target data to be sent in a target time period.

In the application, different time periods are allocated to the target AP and the first AP, so that the data sending times of the target AP and the first AP are staggered. Therefore, the probability of collision between the first AP and the target AP can be reduced, and the communication efficiency is improved.

In an alternative form of the first aspect, the AP interface of the target AP is associated with M target STAs. M is an integer greater than 0. The AP interface of the target AP is associated with the STA interface of the first AP. In the target time period, the AP interface of the target AP transmits downlink data of the target data to be transmitted to the M target STAs and the first AP through Orthogonal Frequency Division Multiple Access (OFDMA). Among them, the utilization rate of Resource Units (RUs) can be improved by transmitting data through OFDMA, thereby improving communication efficiency.

In an alternative form of the first aspect, the STA interface of the target AP is associated with the AP interface of the first AP. And in the target time period, the target AP sends uplink data in the target data to be sent to the first AP through an STA interface of the target AP. The target AP may select to send the target data to be sent to the first AP through the STA interface or the AP interface. Therefore, the flexibility of wireless communication can be improved.

In an alternative form of the first aspect, the STA interface of the target AP is associated with the AP interface of the first AP. The wireless communication method further includes: the target AP receives downlink data in the first data to be transmitted from the first AP through an STA interface of the target AP in the first period. In the first time period, the AP interface of the first AP may send downlink data in the first data to be sent to the target AP and the first STA through OFDMA. The first STA is an STA associated with the first AP. At this time, the target AP may receive downlink data in the first data to be transmitted from the first AP through the STA interface of the target AP in the first time period. Therefore, by transmitting data through OFDMA, the utilization rate of RUs can be improved, thereby improving communication efficiency.

In an optional manner of the first aspect, the AP interface of the target AP is associated with the STA interface of the first AP. The wireless communication method further includes: and the target AP receives uplink data in the first data to be sent from the first AP through an AP interface of the target AP in the first time period. The first AP may select to send the first data to be sent to the target AP through the STA interface or the AP interface. Therefore, the flexibility of wireless communication can be improved.

In an optional manner of the first aspect, the wireless communication method further includes: and the target AP obtains a free competition time period according to the free competition duration. There is no overlapping time period among the first time period, the target time period, and the free contention time period, i.e., the free contention time period is different from the first time period and the target time period. The AP interface of the target AP is associated with M target STAs, wherein M is an integer larger than 0. The target AP may transmit information of the contention free period to the M target STAs. And M target STAs contend to send uplink data to the target AP in the free contention period. As can be seen from the foregoing description, the target AP transmits the target data to be transmitted in the target time period. The first AP sends first data to be sent in a first time period. Therefore, the method and the device can reduce the probability of collision between the STA and the AP, and improve the communication efficiency.

In an alternative form of the first aspect, the AP interface of the target AP is associated with M target STAs. M is an integer greater than 0. The AP interface of the target AP is associated with the STA interface of the first AP. The wireless communication method further includes: in the free contention period, the AP interface of the target AP receives uplink data transmitted by the M target STAs and the first AP through OFDMA. The first AP may also participate in contention of the contention free period, so as to improve flexibility of communication. And, through OFDMA received data, can improve RU's utilization ratio, and then improve communication efficiency.

In an optional manner of the first aspect, the wireless communication method further comprises: the target AP receives an activation frame from an access controller, AC). The target AP sends a first request to the first AP according to the activation frame. The first request is for requesting first traffic information. Any AP in the WDS may be the target AP. Therefore, if the AP itself determines whether or not the AP is the target AP, management is disturbed. In the present application, the target AP is activated by the AC, which may facilitate management.

In an optional manner of the first aspect, the number of APs associated with the first AP is X, and the number of APs associated with the target AP is Y. Wherein Y is greater than X. Wherein, when the number of the neighboring APs is larger, the probability of collision between the APs is larger. Therefore, the AP with a large number of associated APs can be selected as the target AP, so that the probability of collision between APs is further reduced, and the communication efficiency is improved.

In an optional manner of the first aspect, the first traffic information includes a first Modulation and Coding Strategy (MCS) and/or a first communication identifier (TID) of the first data to be transmitted. And the target AP obtains a first time period and a target time period according to the first queue size information, the target queue size information, the first MCS and/or the first TID. The target AP may calculate a theoretical transmission speed according to the first MCS, and then calculate the first time period according to the theoretical transmission speed. Therefore, the accuracy of calculating the first time period can be improved by the MCS, and allocation of too long or too short time period to the first AP is avoided. The priority of the first TID representation is positively correlated with the duration of the first time period. Therefore, the first TID may be used to modify the first time period, so that an AP carrying a high priority TID may occupy a longer TXOP duration, thereby guaranteeing quality of service.

In an alternative form of the first aspect, the AP interface of the target AP is associated with M target STAs. M is an integer greater than 1. The wireless communication method further includes: and the target AP determines the priorities of M target STAs according to the target TID of the target data to be sent. The M target STAs include a high priority STA and a low priority STA. The target AP allocates RUs for the first high priority queue and the first low priority queue. The first high priority queue includes a high priority STA and a first AP. The first low priority queue includes low priority STAs. And in the target time period, the target AP sends target data to be sent according to the distributed RUs. Among them, delay of data transfer between APs may seriously reduce WDS communication efficiency. In the present application, the communication efficiency of the WDS can be improved by preferentially forwarding the data of the AP.

In an alternative form of the first aspect, the target AP allocates a first period of RUs to the first high priority queue and the first low priority queue. The wireless communication method further includes: the target AP allocates a second periodic RU for the second high priority queue and the second low priority queue. Wherein the second high priority queue includes STAs in the first high priority queue that are not allocated to RUs for the first period. Wherein, the target AP allocates RUs for the target STA and the first AP periodically. In each period, the target AP re-divides the level of the STA. The level of the STA includes a high priority and a low priority. The target AP preferentially allocates RUs to the high priority STAs. In the first period of RU allocation, there may be a portion of STAs that are not allocated to RUs in the first high priority queue. In the RU allocation for the second period, the target AP directly treats the part of STAs as high priority STAs. In the second period, the target AP may be prevented from dividing the portion of STAs into low priority, increasing the probability of the portion of STAs being assigned RUs. Therefore, the method and the device can improve the fairness of RU allocation and improve the communication quality.

A second aspect of the present application provides a method of wireless communication. The wireless communication method includes: the first access point AP sends the first traffic information to the target AP. The first traffic information includes first queue size information of first to-be-transmitted data of the first AP. The first AP receives information of the first period from the target AP. The first time period is different from the target time period, and the target time period and the first time period are obtained by the target AP according to the first queue size information and the target traffic information. The target traffic information includes target queue size information of target data to be sent of the target AP. The target AP is used for sending target data to be sent in a target time period. The first AP sends first data to be sent in a first time period.

In an alternative form of the second aspect, the AP interface of the first AP is associated with N first stations STA. N is an integer greater than 0. The AP interface of the first AP is associated with the STA interface of the target AP. In the first time period, the AP interface of the first AP sends downlink data in the first data to be sent to the N first STAs and the target AP through OFDMA.

In an alternative form of the second aspect, the STA interface of the first AP is associated with the AP interface of the target AP. In the first time period, the first AP sends uplink data in the first data to be sent to the target AP through an STA interface of the first AP.

In an alternative form of the second aspect, the STA interface of the first AP is associated with the AP interface of the target AP. The wireless communication method further includes: and in the target time period, the first AP receives downlink data in target data to be sent from the target AP through an STA interface of the first AP.

In an alternative form of the second aspect, the STA interface of the first AP is associated with the AP interface of the target AP. The wireless communication method further includes: and in the target time period, the first AP receives uplink data in the target data to be sent from the target AP through an AP interface of the first AP.

In an optional manner of the second aspect, the wireless communication method further includes: the first AP receives information of a contention free period from the target AP. The free contention period is different from the first period and the target period. The STA interface of the first AP is associated with the target AP. And the STA interface of the first AP contends to send uplink data to the target AP in the free contention period.

In an optional manner of the second aspect, the AP interface of the first AP is associated with N first STAs, where N is an integer greater than 0. The AP interface of the first AP is associated with the STA interface of the target AP. The wireless communication method further includes: in the free contention period, the AP interface of the first AP receives uplink data transmitted by the N first STAs and the target AP through OFDMA.

In an alternative manner of the second aspect, the number of APs associated with the first AP is X, and the number of APs associated with the target AP is Y. Wherein Y is greater than X.

In an alternative form of the second aspect, the first traffic information includes a first MCS and/or a first TID of the first data to be transmitted. The target time period and the first time period are obtained by the target AP according to the first queue size information, the target queue size information, the first MCS, and/or the first TID.

In an alternative form of the second aspect, the AP interface of the first AP is associated with N first STAs. N is an integer greater than 1. The wireless communication method further includes: the first AP determines the priority of the N first STAs according to the first TID of the first data to be transmitted. The N first STAs include a high priority STA and a low priority STA. The first AP allocates RUs for the first high priority queue and the first low priority queue. The first high priority queue includes the high priority STAs and the target AP. The first low priority queue includes low priority STAs. And in the first time period, the first AP sends the first data to be sent according to the allocated RU.

In an alternative form of the second aspect, the first AP allocates a first period of RUs to the first high priority queue and the first low priority queue. The wireless communication method further includes: the first AP allocates RUs of the second period for the second high priority queue and the second low priority queue. Wherein the second high priority queue includes STAs in the first high priority queue that are not allocated to RUs for the first period.

A third aspect of the present application provides a wireless distributed system, WDS. The WDS includes a target AP and a first AP. The first AP is used for sending first traffic information to the target AP. The first traffic information includes first queue size information of first to-be-transmitted data of the first AP. The target AP is used to obtain target traffic information. The target traffic information includes target queue size information of target data to be sent of the target AP. The target AP is used for obtaining a first time period and a target time period according to the first queue size information and the target queue size information. The first time period and the target time period are different. The target AP is used for sending the information of the first time period to the first AP. The first AP is used for sending first data to be sent in a first time period. The target AP is used for sending target data to be sent in a target time period.

In an optional manner of the third aspect, the AP interface of the target AP is associated with M target stations STA. M is an integer greater than 0. The AP interface of the target AP is associated with the STA interface of the first AP. And in the target time period, the AP interface of the target AP sends downlink data in the target data to be sent to the M target STAs and the first AP through OFDMA.

In an optional manner of the third aspect, the STA interface of the target AP is associated with the AP interface of the first AP. And in the target time period, the target AP is used for sending uplink data in the target data to be sent to the first AP through an STA interface of the target AP.

In an alternative form of the third aspect, the AP interface of the first AP is associated with the STA interface of the target AP. The AP interface of the first AP is associated with the N first STA interfaces. M is an integer greater than 0. The first AP is configured to send downlink data in the first data to be sent to the N first STAs and the target AP through OFDMA in the first time period.

In an optional manner of the third aspect, the STA interface of the first AP is associated with the AP interface of the target AP. And the first AP sends uplink data in the first data to be sent to the target AP through an STA interface of the first AP in the first time period.

In an optional manner of the third aspect, the target AP is further configured to obtain the contention free period according to the contention free duration. There is no overlapping time period among the first time period, the target time period, and the free contention time period, i.e., the free contention time period is different from the first time period and the target time period.

In an optional manner of the third aspect, the AP interface of the target AP is associated with M target STAs. M is an integer greater than 0. The AP interface of the target AP is associated with the STA interface of the first AP. In the free contention period, the AP interface of the target AP receives uplink data transmitted by the M target STAs and the first AP through OFDMA.

In an optional manner of the third aspect, the AP interface of the first AP is associated with N first STAs, where N is an integer greater than 0. The AP interface of the first AP is associated with the STA interface of the target AP. In the contention free period, the AP interface of the first AP receives uplink data transmitted by the N first STAs and the target AP through OFDMA.

In an alternative form of the third aspect, the target AP is further configured to receive an activation frame from a. The target AP is further configured to send a first request to the first AP based on the activation frame. The first AP is used for sending first traffic information to the target AP according to the first request.

In an optional manner of the third aspect, the number of APs associated with the first AP is X, and the number of APs associated with the target AP is Y. Wherein Y is greater than X.

In an optional manner of the third aspect, the first traffic information comprises a first MCS and/or a first TID of the first data to be transmitted. The target AP is used for obtaining a first time period and a target time period according to the first queue size information, the target queue size information, the first MCS and/or the first TID.

In an alternative form of the third aspect, the AP interface of the target AP is associated with M target STAs. M is an integer greater than 1. The target AP is also used for determining the priorities of the M target STAs according to the target TID of the target data to be sent. The M target STAs include a high priority STA and a low priority STA. The target AP is configured to allocate RUs for the first high priority queue and the first low priority queue. And in the target time period, the target AP is used for transmitting target data to be transmitted according to the distributed RUs. The first high priority queue includes a high priority STA and a first AP. The first low priority queue includes low priority STAs.

In an alternative form of the third aspect, the target AP is configured to allocate a first period of RUs to the first high priority queue and the first low priority queue. The target AP is also configured to allocate a second periodic RU for the second high priority queue and the second low priority queue. Wherein the second high priority queue includes STAs in the first high priority queue that are not allocated to RUs for the first period.

In an optional manner of the third aspect, the AP interface of the first AP is associated with N first STAs. N is an integer greater than 1. The first AP is used for determining the priority of the N first STAs according to the first TID of the first data to be transmitted. The N first STAs include a high priority STA and a low priority STA. The first AP is configured to allocate RUs for the first high priority queue and the first low priority queue. In the first time period, the first AP is configured to transmit first data to be transmitted according to the allocated RUs. Wherein the first high priority queue comprises the high priority STAs and the target AP. The first low priority queue includes low priority STAs.

In an alternative form of the third aspect, the first AP is configured to allocate a first period of RUs to the first high priority queue and the first low priority queue. The first AP is also configured to allocate a second periodic RU for the second high priority queue and the second low priority queue. Wherein the second high priority queue includes STAs in the first high priority queue that are not allocated to RUs for the first period.

A fourth aspect of the present application provides a wireless communication apparatus. The wireless communication device comprises a receiving module, an obtaining module, a processing module, a first sending module and a second sending module. The receiving module is configured to receive first traffic information from a first AP. The first traffic information includes first queue size information of first to-be-transmitted data of the first AP. The acquisition module is used for acquiring target flow information. The target traffic information includes target queue size information of target data to be transmitted of the wireless communication device. The processing module is used for obtaining a first time period and a target time period according to the first queue size information and the target queue size information. The first time period and the target time period are different. The first sending module is configured to send information of the first time period to the first AP. The information of the first time period is used for the first AP to send the first data to be sent in the first time period. The second sending module is used for sending the target data to be sent in the target time period.

In an alternative form of the fourth aspect, the AP interface of the wireless communication device is associated with M target STAs. M is an integer greater than 0. The AP interface of the wireless communication device is associated with the STA interface of the first AP. The second sending module is specifically configured to send downlink data in the target data to be sent to the M target STAs and the first AP through OFDMA in the target time period.

In an alternative form of the fourth aspect, the STA interface of the wireless communication device is associated with the AP interface of the first AP. The second sending module is specifically configured to send, to the first AP, uplink data in the target data to be sent through an STA interface of the wireless communication device in the target time period.

In an alternative form of the fourth aspect, the STA interface of the wireless communication device is associated with the AP interface of the first AP.

The receiving module is further configured to receive downlink data in the first data to be transmitted from the first AP through an STA interface of the wireless communication device in the first time period.

In an optional manner of the fourth aspect, the AP interface of the wireless communication device is associated with the STA interface of the first AP. The receiving module is further configured to receive, in the first time period, uplink data in the first data to be transmitted from the first AP through an AP interface of the wireless communication device.

In an optional manner of the fourth aspect, the processing module is further configured to obtain the contention free period according to a contention free duration. There is no overlapping time period among the first time period, the target time period, and the free contention time period, i.e., the free contention time period is different from the first time period and the target time period.

In an alternative form of the fourth aspect, the AP interface of the wireless communication device is associated with M target STAs. M is an integer greater than 0. The AP interface of the wireless communication device is associated with the STA interface of the first AP. The receiving module is further configured to receive uplink data sent by the M target STAs and the first AP through OFDMA in the contention free period.

In an optional manner of the fourth aspect, the receiving module is further configured to receive an activation frame from the AC. The receiving module is further configured to send a first request to the first AP according to the activation frame. The first request is for requesting first traffic information.

In an optional manner of the fourth aspect, the number of APs associated with the first AP is X, and the number of APs associated with the wireless communication apparatus is Y. Wherein Y is greater than X.

In an optional manner of the fourth aspect, the first traffic information comprises a first MCS and/or a first TID of the first data to be transmitted. The processing module is specifically configured to obtain a first time period and a target time period according to the first queue size information, the target queue size information, the first MCS, and/or the first TID.

In an alternative form of the fourth aspect, the AP interface of the wireless communication device is associated with M target STAs. M is an integer greater than 1. The processing module is further configured to determine priorities of the M target STAs according to the target TID of the target data to be sent. The M target STAs include a high priority STA and a low priority STA. The processing module is further configured to allocate RUs for the first high priority queue and the first low priority queue. In the target time period, the second sending module is specifically configured to send the target data to be sent according to the allocated RUs. The first high priority queue includes a high priority STA and a first AP. The first low priority queue includes low priority STAs.

In an alternative form of the fourth aspect, the processing module is specifically configured to allocate a first period of RUs to the first high priority queue and the first low priority queue. The processing module is further configured to allocate a second periodic RU for the second high priority queue and the second low priority queue. Wherein the second high priority queue includes STAs in the first high priority queue that are not allocated to RUs for the first period.

A fifth aspect of the present application provides a wireless communication apparatus. The wireless communication device comprises a first sending module, a receiving module and a second sending module. The first sending module is used for sending the first traffic information to the target AP. The first traffic information includes first queue size information of first to-be-transmitted data of the wireless communication apparatus. The receiving module is configured to receive information of the first time period from the target AP. The first time period and the target time period are different. The target time period and the first time period are obtained by the target AP according to the first queue size information and the target traffic information. The target traffic information includes target queue size information of target data to be sent of the target AP. The target AP is used for sending target data to be sent in a target time period. The second sending module is used for sending the first data to be sent in the first time period.

In an alternative form of the fifth aspect, the AP interface of the wireless communication device is associated with the N first stations STA. N is an integer greater than 0. The AP interface of the wireless communication device is associated with the STA interface of the target AP. The second sending module is specifically configured to send downlink data in the first data to be sent to the N first STAs and the target AP through OFDMA in the first time period.

In an alternative form of the fifth aspect, the STA interface of the wireless communication device is associated with the AP interface of the target AP. In the first time period, the second sending module is specifically configured to send uplink data in the first data to be sent to the target AP through an STA interface of the wireless communication device.

In an alternative form of the fifth aspect, the STA interface of the wireless communication device is associated with the AP interface of the target AP. In the target time period, the receiving module is further configured to receive downlink data in the target to-be-sent data from the target AP through an STA interface of the wireless communication device.

In an alternative form of the fifth aspect, the STA interface of the wireless communication device is associated with the AP interface of the target AP. In the target time period, the receiving module is further configured to receive, through an AP interface of the wireless communication device, uplink data in the target data to be sent from the target AP.

In an optional manner of the fifth aspect, the receiving module is further configured to receive information of the contention free period from the target AP. The free competition period is different from the first period and the target period. The STA interface of the wireless communication device is associated with the target AP. The second sending module is further configured to contend to send uplink data to the target AP within the contention-free period through the STA interface of the wireless communication device.

In an optional manner of the fifth aspect, the AP interface of the wireless communication device is associated with N first STAs, N being an integer greater than 0. The AP interface of the wireless communication device is associated with the STA interface of the target AP. The receiving module is further configured to receive uplink data sent by the N first STAs and the target AP through OFDMA in the contention free period.

In an alternative form of the fifth aspect, the number of APs associated with the wireless communication device is X and the number of APs associated with the target AP is Y. Wherein Y is greater than X.

In an optional manner of the fifth aspect, the first traffic information comprises a first MCS and/or a first TID of the first data to be transmitted. The target time period and the first time period are obtained by the target AP according to the first queue size information, the target queue size information, the first MCS, and/or the first TID.

In an optional manner of the fifth aspect, the AP interface of the wireless communication device is associated with the N first STAs. N is an integer greater than 1. The wireless communication device also includes a processing module. The processing module is used for determining the priority of the N first STAs according to the first TID of the first data to be sent. The N first STAs include a high priority STA and a low priority STA. The wireless communication device allocates RUs for the first high priority queue and the first low priority queue. In the first time period, the second sending module is specifically configured to send the first data to be sent according to the allocated RU. The first high priority queue includes the high priority STAs and the target AP. The first low priority queue includes low priority STAs.

In an alternative form of the fifth aspect, the processing module is specifically configured to allocate a first periodic RU for the first high priority queue and the first low priority queue. The processing module is further configured to allocate a second periodic RU for the second high priority queue and the second low priority queue. Wherein the second high priority queue includes STAs of the first high priority queue that are not allocated to an RU for the first period.

A sixth aspect of the present application provides a target AP. The target AP includes a transceiver and a processor. Wherein the transceiver is configured to receive first traffic information from the first AP. The first traffic information includes first queue size information of first to-be-transmitted data of the first AP. The processor is used for obtaining target flow information. The target traffic information includes target queue size information of target data to be sent of the target AP. The processor is further configured to obtain a first time period and a target time period according to the first queue size information and the target queue size information. The first time period and the target time period are different. The transceiver is further configured to transmit information of the first time period to the first AP. The information of the first time period is used for the first AP to send the first data to be sent in the first time period. The transceiver is further configured to transmit the target data to be transmitted in the target time period.

In an alternative form of the sixth aspect, the AP interface of the target AP is associated with M target STAs. M is an integer greater than 0. The AP interface of the target AP is associated with the STA interface of the first AP. The transceiver is specifically configured to send downlink data in the target data to be sent to the M target STAs and the first AP through OFDMA in the target time period.

In an alternative form of the sixth aspect, the STA interface of the target AP is associated with the AP interface of the first AP. The transceiver is specifically configured to send, to the first AP, uplink data in the target data to be sent through an STA interface of the target AP in the target time period.

In an alternative form of the sixth aspect, the STA interface of the target AP is associated with the AP interface of the first AP. The transceiver is further configured to receive downlink data in the first data to be transmitted from the first AP through the STA interface of the target AP in the first time period.

In an alternative form of the sixth aspect, the AP interface of the target AP is associated with the STA interface of the first AP. The transceiver is further configured to receive, in the first time period, uplink data in the first data to be transmitted from the first AP through the AP interface of the target AP.

In an optional manner of the sixth aspect, the processor is further configured to obtain the contention free period according to a contention free duration. There is no overlapping time period among the first time period, the target time period, and the free contention time period, i.e., the free contention time period is different from the first time period and the target time period.

In an alternative form of the sixth aspect, the AP interface of the target AP is associated with M target STAs. M is an integer greater than 0. The AP interface of the target AP is associated with the STA interface of the first AP. The transceiver is further configured to receive uplink data transmitted by the M target STAs and the first AP through the OFDMA in the contention free period.

In an alternative form of the sixth aspect, the transceiver is further configured to receive an activation frame from the AC. The transceiver is further configured to transmit a first request to the first AP according to the activation frame. The first request is for requesting first traffic information.

In an alternative manner of the sixth aspect, the number of APs associated with the first AP is X, and the number of APs associated with the target AP is Y. Wherein Y is greater than X.

In an optional manner of the sixth aspect, the first traffic information comprises a first MCS and/or a first TID of the first data to be transmitted. The processor is specifically configured to obtain a first time period and a target time period according to the first queue size information, the target queue size information, the first MCS, and/or the first TID.

In an alternative form of the sixth aspect, the AP interface of the target STA is associated with M target STAs. M is an integer greater than 1. The processor is further configured to determine priorities of the M target STAs according to the target TID of the target data to be sent. The M target STAs include a high priority STA and a low priority STA. The processor is also configured to allocate RUs for the first high priority queue and the first low priority queue. In the target time period, the transceiver is specifically configured to transmit the target data to be transmitted according to the allocated RUs. The first high priority queue includes a high priority STA and a first AP. The first low priority queue includes low priority STAs.

In an alternative form of the sixth aspect, the processor is specifically configured to allocate a first period of RUs to the first high priority queue and the first low priority queue. The processor is also configured to allocate a second periodic RU for the second high priority queue and the second low priority queue. Wherein the second high priority queue includes STAs in the first high priority queue that are not allocated to RUs for the first period.

A seventh aspect of the present application provides a first AP. The first AP includes a transceiver and a processor. The transceiver is used for sending first traffic information to the target AP. The first traffic information includes first queue size information of first to-be-transmitted data of the first AP. The transceiver is also configured to receive information for the first time period from the target AP. The processor is used for reading the information of the first time period. The first time period and the target time period are different. The target time period and the first time period are obtained by the target AP according to the first queue size information and the target traffic information. The target traffic information includes target queue size information of target data to be sent of the target AP. The target AP is used for sending target data to be sent in a target time period. The transceiver is further configured to transmit first data to be transmitted in a first time period.

In an optional manner of the seventh aspect, the AP interface of the first AP is associated with N first stations STA. N is an integer greater than 0. The AP interface of the first AP is associated with the STA interface of the target AP. The transceiver is specifically configured to send downlink data in the first data to be sent to the N first STAs and the target AP through OFDMA in the first time period.

In an optional manner of the seventh aspect, the STA interface of the first AP is associated with the AP interface of the target AP. In the first time period, the transceiver is specifically configured to send uplink data in the first data to be sent to the target AP through an STA interface of the wireless communication device.

In an optional manner of the seventh aspect, the STA interface of the first AP is associated with the AP interface of the target AP. In the target time period, the transceiver is further configured to receive downlink data in the target to-be-sent data from the target AP through the STA interface of the first AP.

In an optional manner of the seventh aspect, the STA interface of the first AP is associated with the AP interface of the target AP. In the target time period, the transceiver is further configured to receive, through the AP interface of the first AP, uplink data in the target data to be sent from the target AP.

In an optional manner of the seventh aspect, the transceiver is further configured to receive information of the contention free period from the target AP. The free contention period is different from the first period and the target period. The STA interface of the first AP is associated with the target AP. The transceiver is further configured to contend for uplink data to be sent to the target AP within the contention-free period through the STA interface of the first AP.

In an optional manner of the seventh aspect, the AP interface of the first AP is associated with N first STAs, where N is an integer greater than 0. The AP interface of the first AP is associated with the STA interface of the target AP. The transceiver is further configured to receive uplink data transmitted by the N first STAs and the target AP through OFDMA in the contention free period.

In an optional manner of the seventh aspect, the number of APs associated with the first AP is X, and the number of APs associated with the target AP is Y. Wherein Y is greater than X.

In an optional manner of the seventh aspect, the first traffic information comprises a first MCS and/or a first TID of the first data to be transmitted. The target time period and the first time period are obtained by the target AP according to the first queue size information, the target queue size information, the first MCS, and/or the first TID.

In an optional version of the seventh aspect, the AP interface of the first AP is associated with N first STAs. N is an integer greater than 1. The processor is configured to determine priorities of the N first STAs according to a first TID of the first data to be transmitted. The N first STAs include a high priority STA and a low priority STA. The first AP allocates RUs for the first high priority queue and the first low priority queue. During the first time period, the transceiver is specifically configured to transmit the first data to be transmitted according to the allocated RUs. The first high priority queue includes the high priority STAs and the target AP. The first low priority queue includes low priority STAs.

In an alternative form of the seventh aspect, the processor is specifically configured to allocate a first period of RUs to the first high priority queue and the first low priority queue. The processor is also configured to allocate a second periodic RU for the second high priority queue and the second low priority queue. Wherein the second high priority queue includes STAs in the first high priority queue that are not allocated to RUs for the first period.

An eighth aspect of the present application provides a computer storage medium, wherein the computer storage medium has instructions stored therein, and when executed on a computer, the instructions cause the computer to perform the method according to the first aspect or any one of the embodiments of the first aspect; or cause the computer to perform a method as described in the second aspect or any one of the embodiments of the second aspect.

A ninth aspect of the present application provides a computer program product, which, when executed on a computer, causes the computer to perform the method according to the first aspect or any one of the embodiments of the first aspect; or cause the computer to perform a method as described in the second aspect or any one of the embodiments of the second aspect.

Drawings

Fig. 1 is a flow diagram of a wireless communication method provided herein;

FIG. 2 is a schematic diagram of a first configuration of a WDS as provided herein;

FIG. 3 is a schematic diagram of the structure of the first traffic information provided in the present application;

FIG. 4 is a schematic illustration of a distribution of time periods provided in the present application;

FIG. 5 is a schematic diagram of a second configuration of a WDS as provided herein;

FIG. 6 is a third structural schematic of the WDS provided herein;

FIG. 7 is a schematic flow chart diagram of a RU allocation method provided herein;

FIG. 8 is a fourth structural schematic of the WDS provided herein;

FIG. 9 is a fifth structural schematic of the WDS provided herein;

fig. 10 is a schematic diagram of a first structure of a wireless communication device provided in the present application;

fig. 11 is a second block diagram of a wireless communication device provided in the present application;

fig. 12 is a schematic structural diagram of a communication device provided in the present application.

Detailed Description

It is to be understood that the use of "first," "second," "target," and the like, herein are for purposes of descriptive differentiation only and are not to be construed as indicating or implying relative importance, nor order. In addition, reference numerals and/or letters are repeated among the various figures of the present application for sake of brevity and clarity. Repetition does not indicate a strict, restrictive relationship between the various embodiments and/or configurations. For example, the features or contents identified by broken lines in the drawings of the present application can be understood as optional operations or optional structures of the embodiments.

The wireless communication method is applied to the field of wireless communication. In the field of wireless communication, a plurality of Access Points (APs) can be organized into a Wireless Distribution System (WDS) through frame interaction. In the WDS, an AP contending for a transmission opportunity (TXOP) can transmit data. However, multiple APs may contend for a TXOP at the same time. At this time, a plurality of APs simultaneously transmit data. Therefore, the plurality of APs interfere with each other, resulting in failure of data transmission, which makes the communication efficiency of the WDS low.

To this end, a wireless communication method is provided in the present application. Fig. 1 is a flowchart illustrating a wireless communication method provided in the present application. As shown in fig. 1, the wireless communication method includes the following steps.

In step 101, an access control point (AC) transmits an activation frame to a target AP.

In this application, the AC needs to select an AP in the WDS as a centralized control point of time domain resources, where the AP is a target AP. The target AP may be any AP in the WDS. For example, fig. 2 is a first schematic diagram of a WDS as provided herein. As shown in fig. 2, the WDS includes AC 201, AP 202, AP 203, AP 204, STA 205, AP206, and STA207. Where AC 201 is integrated on a routing AP (Root AP). The wide area network interface (WAN interface) of the routing AP connects to the public network. The AP interface of the routing AP is associated with the STA interface of AP 202. The AP interface of AP 202 is associated with the STA interface of AP 204. The AP interface of AP 204 is associated with the STA interfaces of AP 203 and AP 206. The AP interface of the AP 204 is also associated with the STA 205. The AP interface of AP206 is associated with STA207. The target AP may be any one of the routing APs, AP 202, AP 203, AP 204, and AP 206. The first AP may be any AP in the WDS other than the target AP.

In practical applications, the probability of collision between APs is greater when the number of neighboring APs is greater. To this end, the AC may select an AP associated with more APs as the target AP. Specifically, the number of APs associated with the first AP is X, and the number of APs associated with the target AP is Y. Y is greater than X. For example, in the WDS of fig. 2, the AC 201 selects AP 204 as the target AP. The first AP may be any one or more of the routing AP, AP 202, AP 203, and AP 206. In this application, the target AP may also allocate frequency domain resources for the first AP. At this time, the first AP is an AP associated with the target AP. For convenience of description, the AP206 will be described as the first AP.

After AC 201 selects AP 204 as the target AP, AC 201 transmits an activation frame to AP 204. The format of the active frame is not limited in this application. The format of the activation frame may be agreed upon in advance by the AC 201 and the AP 204.

In step 102, the target AP sends a first request to the first AP. After the target AP receives the activation frame, the target AP collects traffic information of the first AP. Specifically, the target AP sends a first request to the first AP, requesting the first AP to report traffic information.

In step 103, the first AP sends first traffic information to the target AP.

After receiving the first request, the first AP sends first traffic information to the target AP. The first traffic information and the first request may be a management frame or a data frame. The first traffic information includes information about the first data to be transmitted, such as first queue size information. The first data to be transmitted is data that the first AP is about to transmit but has not yet transmitted. The transmitting end of the first data to be transmitted is the first AP. The first receiving end to be transmitted is an AP or STA associated with the first AP. According to the difference of the receiving end, the first data to be transmitted can be the forward data or the backward data. Specifically, the data transmitted by the AP206 to the STA207 is referred to as fronthaul data. The data sent by the AP206 to the AP 204 is referred to as backhaul data. Fig. 3 is a schematic structural diagram of first traffic information provided in the present application. As shown in fig. 3, the first traffic information includes a first AP identification 301, fronthaul traffic information 302, and backhaul traffic information 303. The forwarding traffic information 302 includes information of forwarding data. The backhaul traffic information 303 includes information of backhaul data. The fronthaul traffic information 302 and the backhaul traffic information 303 include one or more sets of data. Each group of data comprises queue size information, TID and MCS of the first data to be sent. The queue size information of the first data to be transmitted is also referred to as first queue size information. The first queue size information represents a data size of the first data to be transmitted.

It should be understood that when the first to-be-transmitted data of the first AP does not include backhaul data, the first traffic information may not include backhaul traffic information 303. Similarly, when the first to-be-transmitted data of the first AP does not include the fronthaul data, the first traffic information may not include the fronthaul traffic information 302. Also, the AP206 may need to transmit a plurality of first data to be transmitted of different priorities to the STA207. Therefore, there is no strict correspondence between the number of data groups in the forwarding traffic information and the number of STAs associated with the first AP.

In step 104, the target AP acquires target traffic information.

The target traffic information includes information related to target data to be sent, such as target queue size information. The target data to be transmitted is data that is about to be transmitted by the target AP but has not yet been transmitted. The sending end of the target data to be sent is the target AP. The receiving end of the target data to be sent is the AP and/or STA associated with the target AP. According to the difference of the receiving end, the target data to be sent can be forward data or backward data. Specifically, data transmitted by the AP 204 to the AP206, the AP 203, or the STA 205 is referred to as fronthaul data. The data sent by AP 204 to AP 202 is referred to as backhaul data. As for the structure of the target traffic information, the structure of the first traffic information in the aforementioned step 103 may be referred to. The queue size information in the target traffic information is also referred to as target queue size information.

In step 105, the target AP obtains a first time period and a target time period according to the target traffic information and the first traffic information.

The target traffic information includes target queue size information. The first traffic information includes first queue size information. Therefore, the target AP obtaining the first time period and the target time period according to the target traffic information and the first traffic information may also be understood as that the target AP obtains the first time period and the target time period according to the target queue size information and the first queue size information. The duration of the AP sending data is related to the queue size information. Therefore, after obtaining the target queue size information and the first queue size information, the target AP may obtain the first duration and the target duration according to the target queue size information and the first queue size information. According to the actual requirement, the target AP may calculate the first duration and the target duration in different manners. The following description is exemplary.

In a first example, the target AP calculates the first time period and the target time period by equation 1 and equation 2. Equations 1 and 2 are as follows:

where i is equal to the number of first APs plus the number of target APs, i.e., i is equal to the number of first APs plus 1. When the WDS includes only one first AP, i equals 2. As can be seen from the foregoing description of fig. 3, the first traffic information or the target traffic information may include one or more sets of data. For convenience of description, the present application assumes that the first traffic information includes a first set of data and the target traffic information includes a second set of data. QueueSize _i Indicating the queue size of the ith group of data. Rate _i Indicating the theoretical rate derived from the MCS of the ith packet of data. Ci _TID Indicating the correction coefficient obtained according to the TID of the ith set of data. Ci _TID TIDs used to correct low priority may take up longer TXOP durations. For example, the higher the priority of TID token, ci _TID The larger the value of (A); the smaller the priority of TID token, ci _TID The smaller the value of (c). The Overhead represents other fixed Overhead such as headers, check codes, etc. In practical applications, the target AP may periodically collect the first traffic information of the first AP, and then periodically calculate the first duration according to the first traffic information. TimePeriod is the cycle duration. TimeAlloc _i And the TXOP duration allocated to the AP corresponding to the ith group of data. According to the above formula, the target AP may obtain the first duration and the target duration. Wherein the first duration is a TXOP duration of the first AP. The target duration is the TXOP duration of the target AP.

In the second example, the target AP calculates the first time period and the target time period by equation 1 and equation 3. Equation 3 is as follows:

wherein FreeTime is the free contention duration. Other descriptions refer to the related descriptions in equation 1 and equation 2 above. In formula 3, by introducing the free contention period, preparation may be made for obtaining the free contention period subsequently.

By any of the above examples, the target AP may obtain the first duration and the target duration. And after the first time length and the target time length are obtained, the target AP obtains a first time period according to the first time length. The duration of the first time period is a first duration. And the target AP obtains a target time period according to the target duration. The duration of the target time period is the target duration. Wherein there is no overlapping time period between the first time period and the target time period, i.e. the first time period and the target time period are different.

The target AP may also obtain the free contention period according to the free contention duration. The duration of the free contention period is the free contention duration. Wherein the period duration is equal to the sum of the first duration, the target duration and the free contention duration. For example, the cycle duration is 10 milliseconds. The start of the cycle is 0 milliseconds. The end of the cycle is 10 milliseconds. The first duration is 2 milliseconds, the target duration is 3 milliseconds, and the free contention duration is 5 milliseconds. The start time of the free contention period is 0 msec. The termination time of the free contention period is 5 msec. The start time of the target period is 5 msec. The end time of the target period is 8 msec. The starting time of the first period of time is 8 milliseconds. The termination time of the first period is 10 msec.

In other embodiments, the TID is related to the context of the first time period and the target time period. In particular, the first time period precedes the target time period when a first TID representation in the first set of data has a higher priority than a target TID representation in the second set of data. For example, the start time of the first period is 0 msec. The termination time of the first period is 2 msec. The start time of the target period is 2 milliseconds. The termination time of the target period is 5 msec. The first time period is after the target time period when the priority of the first TID representation in the first set of data is lower than the priority of the target TID representation in the second set of data. By associating the context of the first time period and the target time period with the TID, high-priority data can be preferentially transmitted, thereby improving communication quality.

In other embodiments, the contention free period is at the end of the cycle length. Specifically, fig. 4 is a schematic diagram of a distribution of time periods provided in the present application. As shown in fig. 4, one cycle duration includes a target period 401, a first period 402, and a free contention period 403. The free contention period 403 is at the end of one cycle duration. It should be understood that the time period distribution shown in fig. 4 is only one example. Those skilled in the art can make adaptations as needed. The adaptive change includes, but is not limited to, any of the following.

For example, in fig. 4, one cycle duration includes only one first period. In practical applications, one cycle may include a plurality of first time periods. Specifically, the target AP receives i-1 first traffic information from i-1 first APs, i being an integer greater than 2. Each first traffic information includes queue size information of data to be transmitted by one first AP. And the target AP obtains i time periods according to the i-1 queue size information and the target queue size information. The i time periods include i-1 first time periods and a target time period. The i time periods are different from each other. The i-1 first time periods correspond to the i-1 first APs one by one. At this time, a plurality of first periods are included in one cycle duration.

For example, in fig. 4, each time period is continuous in time. In practical applications, the time period may not be continuous. For example, the target time period includes a first target time period and a second target time period. The start time of the first target period is 0 msec. The termination time of the first target period is 1 millisecond. The starting time of the first period is 1 millisecond. The termination time of the first period is 3 msec. The start time of the second target period is 3 milliseconds. The termination time of the second target period is 5 msec. The start time of the free contention period is 5 msec. The termination time of the free contention period is 10 msec.

In step 106, the target AP sends information of the first time period to the first AP. The first time period may include one or more time periods. In one example, if the first time period includes a time period, the information of the first time period includes a start time and an end time of the time period.

In step 107, the target AP transmits the target data to be transmitted in the target time period.

If the target time period is not consumed and the target AP has already transmitted the target data to be transmitted, the target AP may also transmit other data. Conversely, when the target time period is consumed, the target AP may not transmit the target data to be transmitted. At this time, the target AP transmits a part of data in the target data to be transmitted in the target time period. In another possible manner, when the target time period has not been consumed and the target AP has not sent the target data to be sent, the target AP may receive the data to be sent with higher priority. At this time, the target AP may transmit data to be transmitted with higher priority first. After the target AP finishes transmitting the data to be transmitted with higher priority, if the target time period is not consumed, the target AP may continue to transmit the target data to be transmitted.

In order to improve the utilization rate of the RU, the target AP may transmit the target data to be transmitted to the first AP and the target STA through OFDMA. Specifically, as can be seen from the foregoing description related to fig. 2, the AP interface of the AP 204 is associated with the STA interface of the AP 206. The AP interface of the AP 204 is associated with the STA 205. Figure 5 is a schematic diagram of a second configuration of a WDS as provided herein. As shown in fig. 5, the AP interface of AP 204 is associated with

STAs

205, 206. In the target period, the AP interface of the AP 204 transmits downlink data in the target data to be transmitted to the STA 205 and the AP206 through OFDMA.

In other embodiments, to provide flexibility for wireless communication, an association relationship between the STA interface of the AP 204 and the AP interface of the AP206 may be established. As shown in fig. 5, the STA interface of the AP 204 and the AP interface of the AP 206. In the target time period, the STA interface of the AP 204 sends uplink data in the target data to be sent to the AP 206.

Assume that AP 202 is the first AP. As can be seen from the foregoing description related to fig. 2, the AP interface of AP 202 is associated with the STA interface of AP 204. In order to improve the utilization rate of the RU, in the present application, an association relationship between the STA interface of the AP 202 and the AP interface of the AP 204 may be established. As shown in fig. 5, the AP interface of AP 204 is associated with STA 205 and AP 202. In the target period, the AP interface of the AP 204 transmits downlink data in the target data to be transmitted to the STA 205 and the AP 202 through OFDMA.

When both the AP 202 and the AP206 are the first AP, the AP interface of the AP 204 transmits downlink data in the target data to be transmitted to the STA 205, the AP 202, and the AP206 through OFDMA. Fig. 6 is a third structural schematic of the WDS provided herein. As shown in fig. 6, the WDS includes AP 202, AP 204, AP206, and STA 205.AP 204 allocates spectrum resources for STA 205, AP 202, and AP 206. For example, in fig. 6, AP 204 has allocated one RU1 to AP 202. AP 204 allocates one RU2 to AP 206. The AP 204 allocates one RU4 to the STA 205. In the target time period, the AP 204 transmits downlink data in the target data to be transmitted to the STA 205, the AP 202, and the AP206 according to the allocated RUs. Different types of RU are denoted with RU1, RU2, RU4. Please refer to the related description later regarding the RU type.

In practical applications, the delay of data transfer between APs may seriously reduce the communication efficiency of the WDS. For this reason, in the RU allocation process, the target AP may preferentially allocate an RU to the first AP. Specifically, fig. 7 is a flowchart illustrating an RU allocation method provided in the present application. It should be understood that the RU allocation method in the present application is applicable to any one AP in the WDS, e.g., the target AP and the first AP. The RU allocation method will be described below by taking the target AP as an example. As shown in fig. 7, the RU allocation method includes the following steps.

In step 701, the target AP acquires target data to be transmitted of M target STAs and the first AP.

For convenience of description, it is assumed that M is equal to 2. The 2 target STAs include a first target STA and a second target STA. The target data to be transmitted includes data 1, data 2, and data 3. The relevant information of the target data to be sent is shown in table one.

	Receiving end	Queue size information	TID	MCS
					Data 1	First target STA	b1	T1	M1
Data 2	Second target STA	b2	T2	M2
					Data 3	First AP	b3	T3	M3

Watch 1

As shown in table one, the receiving end of data 1 is the first target STA, and the receiving end of data 2 is the second target STA. The receiving end of the data 3 is the first AP. It should be understood that in table one, b1, b2, M1, etc. are used only for distinguishing the codes used in the description, and do not represent the numerical values in practical application.

In step 702, the target AP divides M target STAs into high priority STAs and low priority STAs according to the TID in the target data to be sent. For example, T1 has a value of 0 or 1, and the target AP treats the first target STA as a high priority STA. For example, T2 has a value of 2, and the target AP treats the second target STA as a low priority STA.

In step 703, the target AP allocates RUs for the high priority queue. Wherein the high priority queue includes the high priority STA and the first AP.

The target AP calculates the theoretical rate r which can be reached by using the selected MCS when each receiving end occupies the whole channel bandwidth _MCS To obtain M +1 r _MCS . For example, the MCS selected by the first target STA is M1. Then, the target AP divides the queue size information of each receiving end by the corresponding theoretical rate r _{MCS 1} And M +1 theoretical transmission times are obtained. Wherein, M +1 theoretical transmission time and M +1 equipment one-to-one. The M +1 devices include M target STAs and a first AP. And the target AP corresponds the M +1 theoretical transmission time and the association IDs of the M +1 devices one by one to obtain M +1 binary groups. Each doublet includes a theoretical transmission time and an association ID. The target AP orders the M +1 duplets from large to small according to the theoretical transmission time.

Target AP acquires channel bandwidth b _w And

indicates that the channel bandwidth is b _w The set of all possible RU allocation schemes. The number of elements K in the set is limited. Let RU1 be an RU of 26 subcarriers. RU2 is an RU of 52 subcarriers. RU3 is an RU of 106 subcarriers. RU4 is an RU of 242 subcarriers. RU5 is an RU of 484 subcarriers. For P _(bw) One of the schemes P _m . The target AP queues the RUs therein in a large-to-small RU queue. For example, the RU queue is { RU5, …, RU5, RU4, …, RU4, RU3, …, RU3, RU2, …, RU2, RU1, …, RU1}. Wherein, the RU queue comprises H RUs. The target AP associates M +1 duplets with the RU queue one-to-one starting from the first element. Specifically, the first of the M +1 duplets corresponds to the first RU in the RU queue. The second of the M +1 tuples corresponds to the second RU in the RU queue. And so on. The corresponding one doublet and one RU are referred to as one combination. If H is largeEqual to or greater than M +1, the target AP may obtain M +1 combinations. If H is less than M +1, then the target AP can get H combinations. For convenience of description, assuming that H is equal to M +1, the target AP gets M +1 combinations. For each combination, the target AP can obtain a theoretical rate r by looking up the table _{MCS 2} . For example, the target AP obtains M +1 theoretical rates r by looking up table two (RU 4 and RU5 are not shown in the table) _{MCS 2} 。

Watch two

Where QAM denotes quadrature amplitude modulation (quadrature amplitude modulation). QPSK stands for quadrature phase shift keying (quadrature phase shift keying). BPSK denotes binary phase shift keying (binary phase shift keying).

Obtaining M +1 theoretical velocity r _{MCS 2} And (4) finally. Determining M +1 theoretical rates r by target AP _{MCS 2} The maximum theoretical rate T of (1). The throughput rate is calculated according to equation 4.

Wherein, throughput is T _overhead Fixed overhead spent for each data transmission includes a Short Inter Frame Space (SIFS), media Access Control (MAC) layer processing overhead, and the like. b _i Is queue size information.

For the

In the K schemes, the target AP repeats the above process to obtain K throughput rates. The target AP determines the maximum throughput rate K1 of the K throughput rates. And the target AP selects the RU allocation scheme P1 corresponding to the K1 to perform RU allocation. Specifically, the target AP corresponds M +1 duplets to RU queues in RU allocation scheme P1 one-to-one from the first element. For example, the first of the M +1 tuples and in the RU queueCorresponds to the first RU. At this time, the target AP allocates the first RU in the RU queue to the target STA or the first AP corresponding to the association ID in the first duplet. For example, the second tuple in the M +1 tuples corresponds to the second RU in the RU queue. At this time, the target AP allocates the second RU in the RU queue to the target STA or the first AP corresponding to the association ID in the second duplet. And by analogy, the target AP allocates RUs to the target STAs or the first AP corresponding to the other duplets.

In step 704, the target AP determines whether there are any remaining RUs unassigned.

Assume that in the RU allocation scheme P1, the number of elements of the RU queue is H. If H is greater than M +1, the target AP determines that there are more remaining RUs unassigned. Step 705 is performed. If H is less than or equal to M +1, the target AP determines that no remaining RUs are unallocated. Step 706 is performed.

In step 705, the target AP allocates RUs for the low priority queue. Wherein the low priority queue includes low priority STAs. In the aforementioned step 704, since H is greater than M +1, the RU allocation scheme P1 further includes remaining RU unallocated. The target AP allocates the remaining H-M-1 RUs to STAs in the low priority queue. Until the RUs in the RU queue are assigned, or until each of the M +1 devices is assigned to an RU.

In step 706, the target AP outputs the allocation plan. The target AP allocates a scheme for the M target STAs and the first AP according to the RU allocation scheme in step 704 or step 705.

In practical applications, the target AP may periodically allocate RUs to the target STA and the first AP. In each period, the target AP re-divides the level of the STA. The level of the STA includes a high priority and a low priority. As can be seen from the description of fig. 7, the target AP preferentially allocates RUs to the high priority STAs. In the first periodic RU allocation, there may be a portion of STAs not allocated to the RU in the first high priority queue. For example, where H is less than M + 1. In the RU allocation for the second period, the target AP directly treats the part of STAs as high priority STAs. In the second period, the target AP may be prevented from dividing the portion of STAs into low priority, increasing the probability of the portion of STAs being assigned RUs.

In other embodiments, as can be seen from the description of fig. 7, the target AP preferentially allocates RUs for high priority STAs. Therefore, there may be a case where a low priority STA is not allocated to an RU in the first period. To ensure fairness, STAs in the RU's low priority queue are not allocated for the first period. In the second period, the target AP may put the STA assigned to the RU into the high priority queue.

In other embodiments, the target AP may determine the priority of the target STA according to the fairness factor and the TID of the target data to be sent. Specifically, in step 702. And the target AP divides the M target STAs into high-priority STAs and low-priority STAs according to the TID of the target data to be sent and the M fairness factors. The M fairness factors correspond one-to-one to the M target STAs. For STAs not allocated to RU in the previous cycle, the target AP changes the fairness factor for STAs not allocated to RU in this cycle. Such that the probability of STAs not assigned to an RU being assigned to a high priority queue increases.

In step 108, the first AP transmits the first data to be transmitted for a first time period. With respect to the first data to be transmitted and the description in the first time period, reference may be made to the description of the target data to be transmitted and the target time period in the aforementioned step 107.

As can be seen from the foregoing description related to fig. 2, the AP interface of AP 202 is associated with the STA interface of AP 204. In order to improve the utilization rate of the RU, in the present application, an association relationship between the AP interface of the AP206 and the STA interface of the AP 204 may be established. As shown in fig. 5, the AP interface of AP206 is associated with STA207 and AP 204. In the first period, the AP interface of the AP206 transmits downlink data of the first data to be transmitted to the STA207 and the AP 204 through OFDMA. Fig. 8 is a fourth structural schematic of the WDS provided herein. As shown in fig. 8, the WDS includes AP 204, AP206, and STA207. The AP206 allocates spectrum resources for the STA207 and the AP 204. For example, in fig. 8, AP206 has allocated one RU2 to AP 204. AP206 allocates another RU2 to STA207. In the target period, the AP206 transmits downlink data of the first data to be transmitted to the STA207 and the AP 204 according to the allocated RUs.

In practical applications, data transfer between APs may severely reduce the communication efficiency of the WDS. For this reason, in the RU allocation process, the first AP may preferentially allocate an RU to the first AP. For the description of the RU allocation method, please refer to the related description of fig. 7.

As can be seen from the foregoing description of step 105, the target AP may also obtain a free contention period. The target AP transmits data in the target time period, and the first AP transmits data in the first time period. Therefore, the contention free period is mainly used for the STA to transmit backhaul data. For example, the first STA sends uplink data to the first AP, and the target STA sends uplink data to the target AP. In practical applications, in order to improve flexibility of data transmission, the first AP and/or the target AP may also transmit data in the contention free period.

For example, fig. 9 is a fifth structural schematic of the WDS provided herein. As shown in fig. 9, the WDS includes an AP 204, an AP206, and STAs 205. In the free period, the STA 205 contends for one RU2. The STA 205 transmits uplink data to the AP 204 through one RU2. The AP206 has contended for one RU1. The AP206 transmits uplink data to the AP 204 through one RU1. The AP interface of the AP 204 receives the uplink data transmitted by the STA 205 and the AP206 through OFDMA. Similarly, in the free period, the AP interface of the AP206 may receive the uplink data transmitted by the STA207 and the AP 204 through OFDMA.

It should be understood that in the wireless communication method shown in fig. 1, there is no strict timing restriction between step 104 and steps 102 and 103. Step 104 may be before step 102, after step 101. Also, there is no strict timing constraint relationship between step 107 and step 108. Step 108 may be before step 107, after step 106.

In the application, the target AP allocates different time periods to the target AP and the first AP, so that the time for the target AP and the first AP to send data is staggered as much as possible. Therefore, the probability of collision between the first AP and the target AP can be reduced, thereby improving communication efficiency.

The foregoing describes a wireless communication method in the present application, and a wireless communication apparatus in the present application is described below. Fig. 10 is a first structural diagram of a wireless communication device provided in the present application. As shown in fig. 10, the wireless communication apparatus includes a receiving module 1001, an obtaining module 1002, a processing module 1003, a first transmitting module 1004, and a second transmitting module 1005. The receiving module 1001 is configured to receive first traffic information from a first AP. The first traffic information includes first queue size information of first to-be-transmitted data of the first AP. The obtaining module 1002 is configured to obtain target traffic information. The target traffic information includes target queue size information of target data to be transmitted of the wireless communication device. The processing module 1003 is configured to obtain a first time period and a target time period according to the first queue size information and the target queue size information. The first time period and the target time period are different. The first sending module 1004 is configured to send information of the first time period to the first AP. The information of the first time period is used for the first AP to send the first data to be sent in the first time period. The second sending module 1005 is configured to send the target data to be sent in the target time period.

In other implementations, the modules in the wireless communication device are further configured to perform all or part of the operations that the target AP may perform in the foregoing wireless communication method. For example, the first sending module 1004 is further configured to perform the aforementioned step 102 in fig. 1. The second transmitting module 1005 is further configured to transmit information of the contention free period to the target STA.

Fig. 11 is a second structural diagram of a wireless communication device provided in the present application. As shown in fig. 11, the wireless communication apparatus includes a first transmitting module 1101, a receiving module 1102, and a second transmitting module 1103. The first sending module 1101 is configured to send first traffic information to the target AP. The first traffic information includes first queue size information of first to-be-transmitted data of the wireless communication apparatus. The receiving module 1102 is configured to receive information of the first time period from the target AP. The first time period and the target time period are different. The target time period and the first time period are obtained by the target AP according to the first queue size information and the target traffic information. The target traffic information includes target queue size information of target data to be sent of the target AP. The target AP is used for sending target data to be sent in a target time period. The second sending module 1103 is configured to send the first data to be sent in the first time period.

In other implementations, the modules in the wireless communication apparatus are further configured to perform all or part of the operations that the first AP may perform in the foregoing wireless communication method. For example, the receiving module 1102 is further configured to receive a first request sent by the target AP. The receiving module 1102 is further configured to receive information of the contention free period sent by the receiving target AP. The first transmitting module 1101 is further configured to transmit information of the contention free period to the first STA.

The above describes the wireless communication apparatus in the present application, and the following describes the communication device in the present application. Fig. 12 is a schematic structural diagram of a communication device provided in the present application. The communication device in this application may be the first AP or the target AP. As shown in fig. 12, the communication device 1200 includes a processor 1201 and a transceiver 1202.

The processor 1201 may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of the CPU and the NP. The processor 1201 may further include a hardware chip or other general-purpose processor. The hardware chip may be an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The transceiver 1202 may be a wireless radio frequency module.

When the communication device 1200 is a target AP, the transceiver 1202 is configured to receive first traffic information from a first AP. The first traffic information includes first queue size information of first to-be-transmitted data of the first AP. The processor 1201 is configured to obtain target traffic information. The target traffic information includes target queue size information of target data to be sent of the target AP. The processor 1201 is further configured to obtain a first time period and a target time period according to the first queue size information and the target queue size information. The first time period and the target time period are different. The transceiver 1202 is further configured to transmit information of the first time period to the first AP. The information of the first time period is used for the first AP to send the first data to be sent in the first time period. The transceiver 1202 is further configured to transmit the target data to be transmitted in the target time period.

When the communication device 1200 is a first AP, the transceiver 1202 is configured to transmit first traffic information to a target AP. The first traffic information includes first queue size information of first to-be-transmitted data of the first AP. The transceiver 1202 is also configured to receive information of the first time period from the target AP. The processor 1201 is configured to read information of the first period. The first time period and the target time period are different. The target time period and the first time period are obtained by the target AP according to the first queue size information and the target traffic information. The target traffic information includes target queue size information of target data to be sent of the target AP. The target AP is used for sending target data to be sent in a target time period. The transceiver 1202 is further configured to transmit the first data to be transmitted in the first time period.

In other embodiments, the communication device 1200 also includes a memory 1203. The memory 1203 may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), or the like. The volatile Memory may be a Random Access Memory (RAM). The memory 1203 stores a computer program executable by the processor 1201. When the processor 1201 reads and executes the computer program, all or part of the operations that the target AP or the first AP may perform in fig. 1 or 7 described above may be performed.

The application also provides a digital processing chip. Integrated with circuitry and one or more interfaces to carry out the functions of the processor 1201 described above. When integrated with memory, the digital processing chip may perform the method steps of any one or more of the preceding embodiments.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.

Claims

1.A method of wireless communication, comprising:

a target Access Point (AP) receives first traffic information from a first AP, wherein the first traffic information comprises first queue size information of first data to be transmitted of the first AP;

the target AP acquires target flow information, wherein the target flow information comprises target queue size information of target data to be sent of the target AP;

the target AP obtains a first time period and a target time period according to the first queue size information and the target queue size information, wherein the first time period is different from the target time period;

the target AP sends the information of the first time period to the first AP, wherein the information of the first time period is used for the first AP to send the first data to be sent in the first time period;

and the target AP sends the target data to be sent in the target time period.

2. The method of claim 1,

an AP interface of the target AP is associated with M target stations STA, and M is an integer larger than 0;

the AP interface of the target AP is associated with the STA interface of the first AP;

the target AP sending the target to-be-sent data in the target time period includes: and in the target time period, the AP interface of the target AP sends downlink data in the target data to be sent to the M target STAs and the first AP through OFDMA.

3. The method of claim 1 or 2, wherein the STA interface of the target AP is associated with the AP interface of the first AP;

the target AP sending the target to-be-sent data in the target time period includes: and in the target time period, the target AP sends uplink data in the target data to be sent to the first AP through an STA interface of the target AP.

4. The method of any of claims 1-3, wherein the STA interface of the target AP is associated with the AP interface of the first AP;

the method further comprises the following steps:

and the target AP receives downlink data in the first data to be transmitted from the first AP through an STA interface of the target AP in the first time period.

5. The method according to any one of claims 1 to 4, wherein the AP interface of the target AP is associated with the STA interface of the first AP;

the method further comprises the following steps:

and the target AP receives uplink data in the first data to be sent from the first AP through an AP interface of the target AP in the first time period.

6. The method according to any one of claims 1 to 5, further comprising:

and the target AP obtains a free competition time period according to the free competition duration, wherein the free competition time period is different from the first time period and the target time period.

7. The method of claim 6, wherein the AP interface of the target AP is associated with M target STAs, M being an integer greater than 0, and wherein the AP interface of the target AP is associated with the STA interface of the first AP;

the method further comprises the following steps:

in the contention free period, the AP interface of the target AP receives uplink data transmitted by the M target STAs and the first AP through OFDMA.

8. The method according to any one of claims 1 to 7, further comprising:

the target AP receives an activation frame from a control point AC;

and the target AP sends a first request to the first AP according to the activation frame, wherein the first request is used for requesting the first traffic information.

9. The method according to any one of claims 1 to 8, wherein the number of APs associated with the first AP is X, and the number of APs associated with the target AP is Y;

wherein said Y is greater than said X.

10. A method of wireless communication, comprising:

a first Access Point (AP) sends first traffic information to a target AP, wherein the first traffic information comprises first queue size information of first data to be sent of the first AP;

the first AP receives information of a first time period from the target AP;

the first time period is different from a target time period, the target time period and the first time period are obtained by the target AP according to the first queue size information and target traffic information, the target traffic information includes target queue size information of target data to be sent of the target AP, and the target AP is configured to send the target data to be sent in the target time period;

and the first AP sends the first data to be sent in the first time period.

11. The method of claim 10,

an AP interface of the first AP is associated with N first station STAs, wherein N is an integer greater than 0;

the AP interface of the first AP is associated with the STA interface of the target AP;

the sending, by the first AP, the first to-be-sent data in the first time period according to the information of the first time period includes: in the first time period, the AP interface of the first AP sends downlink data in the first data to be sent to the N first STAs and the target AP through OFDMA.

12. The method of claim 10 or 11, wherein the STA interface of the first AP is associated with the AP interface of the target AP;

the sending, by the first AP, the first to-be-sent data in the first time period according to the information of the first time period includes: and in the first time period, the first AP sends uplink data in the first data to be sent to the target AP through an STA interface of the first AP.

13. The method according to any one of claims 10 to 12, wherein the STA interface of the first AP is associated with the AP interface of the target AP;

the method further comprises the following steps:

and the first AP receives downlink data in the target data to be sent from the target AP through an STA interface of the first AP in the target time period.

14. The method of any of claims 10 to 13, wherein the AP interface of the first AP is associated with the STA interface of the target AP. The method further comprises the following steps:

and the first AP receives uplink data in the target data to be sent from the target AP through an AP interface of the first AP in the target time period.

15. The method according to any one of claims 10 to 14,

the method further comprises the following steps:

the first AP receives information of a free contention period from the target AP, wherein the free contention period is different from the first period and the target period;

and the first AP contends to send uplink data to the target AP through an STA interface of the first AP in the free contention period.

16. The method of claim 15, wherein the AP interface of the first AP is associated with N first STAs, where N is an integer greater than 0, and wherein the AP interface of the first AP is associated with the STA interface of the target AP;

the method further comprises the following steps:

in the contention free period, the AP interface of the first AP receives uplink data transmitted by the N first STAs and the target AP through OFDMA.

17. A Wireless Distributed System (WDS), comprising:

a target Access Point (AP) and a first AP;

the first AP is configured to send first traffic information to the target AP, where the first traffic information includes first queue size information of first to-be-sent data of the first AP;

the target AP is used for acquiring target flow information, wherein the target flow information comprises target queue size information of target data to be sent of the target AP;

the target AP is used for obtaining a first time period and a target time period according to the first queue size information and the target queue size information, wherein the first time period is different from the target time period;

the target AP is used for sending the information of the first time period to the first AP;

the first AP is used for sending the first data to be sent in the first time period;

and the target AP is used for sending the target data to be sent in the target time period.

18. The system of claim 17,

the target AP is configured to send the target to-be-sent data in the target time period, where the target AP is configured to: and in the target time period, the AP interface of the target AP sends downlink data in the target data to be sent to the M target STAs and the first AP through OFDMA.

19. The system according to claim 17 or 18, wherein the AP interface of the first AP is associated with the STA interface of the target AP, the AP interface of the first AP is associated with N first STA interfaces, N is an integer greater than 0;

the first AP configured to transmit the first data to be transmitted in the first time period includes: the first AP is configured to send downlink data of the first data to be sent to the N first STAs and the target AP through OFDMA in the first time period.

20. The system of any one of claims 17 to 19,

the target AP is further used for obtaining a free competition time period according to a free competition duration, wherein the free competition time period is different from the first time period and the target time period;

21. the system of claim 20, wherein the AP interface of the target AP is associated with M target STAs, M being an integer greater than 0;

during the contention free period, an AP interface of the target AP receives data transmitted by the M target STAs and the first AP through OFDMA.

22. A wireless communications apparatus, comprising:

a receiving module, configured to receive first traffic information from a first AP, where the first traffic information includes first queue size information of first data to be transmitted of the first AP;

an obtaining module, configured to obtain target traffic information, where the target traffic information includes target queue size information of target to-be-sent data of the wireless communication device;

the processing module is used for obtaining a first time period and a target time period according to the first queue size information and the target queue size information, wherein the first time period is different from the target time period;

a first sending module, configured to send information of the first time period to the first AP, where the information of the first time period is used for the first AP to send the first to-be-sent data in the first time period;

and the second sending module is used for sending the target data to be sent in the target time period.

23. The apparatus of claim 22,

an AP interface of the wireless communication device is associated with M target Stations (STA), wherein M is an integer greater than 0;

an AP interface of the wireless communication device is associated with a STA interface of the first AP;

the second sending module is specifically configured to send, in the target time period, downlink data in the target data to be sent to the M target STAs and the first AP through OFDMA.

24. A wireless communications apparatus, comprising:

a first sending module, configured to send first traffic information to a target AP, where the first traffic information includes first queue size information of first data to be sent of the wireless communication apparatus;

a receiving module, configured to receive information of a first time period from the target AP;

and the second sending module is used for sending the first data to be sent in the first time period.

25. The apparatus of claim 24,

an AP interface of the wireless communication device is associated with N first Stations (STA), wherein N is an integer greater than 0;

the AP interface of the wireless communication device is associated with the STA interface of the target AP;

the second sending module is specifically configured to send, in the first time period, downlink data in the first data to be sent to the N first STAs and the target AP through OFDMA.