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CN-122002495-A - Communication method and communication device

CN122002495ACN 122002495 ACN122002495 ACN 122002495ACN-122002495-A

Abstract

The application provides a communication method and a communication device. The method is performed by an access point in a centralized wireless local area network architecture to accomplish time synchronization of the access point and the controller when transmitting wireless information. The method includes that a control module of the access point firstly completes time synchronization with a controller. And secondly, the wireless module of the access point and the control module of the access point complete time synchronization, so that the time synchronization of the wireless module of the access point and the controller is realized. The application improves the stability of the WLAN network and the transmission efficiency of running data and reduces the conflict problem in a wireless channel by completing the time synchronization between the controller and the wireless module of the access point in the WLAN network.

Inventors

  • QIU YIGUI
  • ZHAO WANGSHENG
  • ZHENG LUBIN

Assignees

  • 华为技术有限公司

Dates

Publication Date
20260508
Application Date
20241104

Claims (20)

  1. 1. A method of communication, the method performed by an access point in a centralized wireless local area network architecture, comprising: Generating a first frequency signal for time synchronization between a wireless module of the access point and a control module of the access point, wherein, The control module of the access point has completed time synchronization and/or frequency synchronization with a controller in the centralized wireless local area network architecture prior to generating the first frequency signal.
  2. 2. The method of claim 1, wherein the first frequency signal comprises a periodic signal, the method further comprising: determining a first timestamp of a second sub-signal of the first frequency signal according to a first sub-signal of the first frequency signal, wherein, The second sub-signal is generated after the first sub-signal, and the first timestamp is used for completing time synchronization between the wireless module of the access point and the control module.
  3. 3. The method according to claim 1 or 2, further comprising: generating a second frequency signal, the second frequency signal comprising a periodic signal, the second frequency signal having a frequency that is higher than the frequency of the first frequency signal; determining a second time stamp of a fourth sub-signal of the second frequency signal according to a third sub-signal of the second frequency signal during an interval period of acquiring the first sub-signal and the second sub-signal, The fourth sub-signal is generated after the third sub-signal, and the second timestamp is used to synchronize time between the wireless module of the access point and the control module.
  4. 4. A method according to any one of claims 1 to 3, further comprising, prior to generating the first frequency signal: generating a third frequency signal comprising an operating frequency of the control module, The frequency of the third frequency signal is higher than the frequency of the first frequency signal.
  5. 5. The method of any of claims 1-4, wherein the control module of the access point is time synchronized with a controller in the centralized wireless local area network architecture, further comprising: Receiving first indication information, wherein the first indication information comprises a third timestamp of the arrival of a first super frame; compensating the third timestamp to obtain a fourth timestamp; Receiving the first super frame and setting a local time to the fourth timestamp, wherein, The controller is connected with the access point through an optical fiber.
  6. 6. The method of any of claims 1-4, wherein the control module of the access point is time synchronized with a controller in the centralized wireless local area network architecture, further comprising: Receiving a first message and a second message, wherein the second message carries the moment when the controller sends the first message; sending a third message and receiving a fourth message, wherein the fourth message carries the moment when the controller receives the third message; Determining time offset and time delay between the control module and the controller according to the time when the control module receives the first message, the time carried in the second message, the time when the control module sends the third message and the time carried in the fourth message, The controller is connected with the access point through a network cable.
  7. 7. The method of claim 3, wherein the step of, The first frequency signal comprises a low frequency signal and the second frequency signal comprises an intermediate frequency signal.
  8. 8. The method of claim 4, wherein the step of determining the position of the first electrode is performed, The first frequency signal comprises a low frequency signal and the third frequency signal comprises a high frequency signal.
  9. 9. A communication device is characterized by comprising a control module and a wireless module, wherein, The control module is used for generating a first frequency signal which is used for completing time synchronization between the wireless module and the control module, wherein, The control module has completed time synchronization and/or frequency synchronization with a controller in a centralized wireless local area network architecture prior to generating the first frequency signal.
  10. 10. The apparatus of claim 9, wherein the first frequency signal comprises a periodic signal, The wireless module is further configured to determine, according to the first sub-signal of the first frequency signal, a first timestamp of the second sub-signal of the first frequency signal received, The second sub-signal is generated after the first sub-signal, and the first timestamp is used for completing time synchronization between the wireless module and the control module.
  11. 11. The device according to claim 9 or 10, wherein, The control module is further configured to generate a second frequency signal, where the second frequency signal includes a periodic signal, and the frequency of the second frequency signal is higher than the frequency of the first frequency signal, and in acquiring the interval between the first sub-signal and the second sub-signal, The wireless module is further configured to determine, according to a third sub-signal of the second frequency signal, a second timestamp of a fourth sub-signal that receives the second frequency signal, where the fourth sub-signal is generated after the third sub-signal, and the second timestamp is used to complete time synchronization between the wireless module and the control module.
  12. 12. The apparatus of any one of claims 9 to 11, wherein prior to the control module generating the first frequency signal, the control module is further configured to: generating a third frequency signal comprising an operating frequency of the control module, The frequency of the third frequency signal is higher than the frequency of the first frequency signal.
  13. 13. The apparatus of any of claims 9 to 12, wherein the control module is configured to perform time synchronization with a controller in a centralized wireless local area network architecture, the control module further configured to: Receiving first indication information, wherein the first indication information comprises a third timestamp of the arrival of a first super frame; compensating the third timestamp to obtain a fourth timestamp; Receiving the first super frame and setting a local time to the fourth timestamp, wherein, The communication device is connected with the controller through an optical fiber.
  14. 14. The apparatus of any of claims 9 to 12, wherein the control module is configured to perform time synchronization with a controller in a centralized wireless local area network architecture, wherein the control module is configured to: Receiving a first message and a second message, wherein the second message carries the moment when the controller sends the first message; sending a third message and receiving a fourth message, wherein the fourth message carries the moment when the controller receives the third message; Determining time offset and time delay between the control module and the controller according to the time when the control module receives the first message, the time carried in the second message, the time when the control module sends the third message and the time carried in the fourth message, The communication device is connected with the controller through a network cable.
  15. 15. The apparatus of claim 11, wherein the device comprises a plurality of sensors, The first frequency signal comprises a low frequency signal and the second frequency signal comprises an intermediate frequency signal.
  16. 16. The apparatus of claim 12, wherein the device comprises a plurality of sensors, The first frequency signal comprises a low frequency signal and the third frequency signal comprises a high frequency signal.
  17. 17. A computer readable storage medium for storing a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 8.
  18. 18. A computer program product, characterized in that the computer program product, when run on a computer, causes the computer to perform the method according to any of claims 1 to 8.
  19. 19. A communication device for performing time synchronization with a controller in a centralized wireless local area network architecture, comprising means or units for performing the method of any of claims 1 to 8.
  20. 20. A chip system, characterized in that the chip system comprises a control chip and a wireless chip, wherein, The control chip is used for generating a first frequency signal which is used for completing time synchronization between the wireless chip and the control chip, wherein, The control chip has completed time synchronization and/or frequency synchronization with a controller in a centralized wireless local area network architecture prior to generating the first frequency signal.

Description

Communication method and communication device Technical Field The present application relates to the field of communication technology, and more particularly, to a communication method and a communication apparatus. Background With the rapid development of wireless communication technology, wireless local area network (wireless local area network, WLAN) technology has become an integral part of people's daily lives. The data transmission is realized through the wireless channel resources, and a flexible and convenient network access mode is provided for the user. However, since the wireless channel has only one collision domain, this results in an unavoidable collision problem when a plurality of network nodes attempt to access the network at the same time. Although the current carrier sense multiple access/collision avoidance (CARRIER SENSE multiple ACCESS WITH collision avoidance, CSMA/CA) mechanism reduces the occurrence of collisions to some extent, the problem of time synchronization between the WLAN controller and the slave node is also more serious as the number of slave nodes and user terminals (STAs) increases. If the time between the WLAN controller and the wireless module of the slave node is not completely synchronized, delay or failure of data transmission may be caused, which affects the stability and efficiency of the entire wireless network. Therefore, how to ensure time synchronization between the WLAN controller and the wireless module of the slave node is one of the key factors in maintaining an efficient WLAN network. Disclosure of Invention The application provides a communication method and a communication device, which can complete time synchronization between a WLAN controller and a wireless module of an access point in a WLAN network so as to improve the stability of the WLAN network and the transmission efficiency of operation data and reduce the problem of conflict in a wireless channel. In a first aspect, a method of communication is provided. The method is performed by an access point in a centralized wireless local area network, WLAN, architecture. The method includes generating a first frequency signal. The first frequency signal is used to achieve time synchronization between the wireless module of the access point and the control module of the access point. Wherein the control module of the access point and the controller in the centralized wireless local area network architecture have completed time synchronization and/or frequency synchronization before generating the first frequency signal. Based on the technical scheme, the time synchronization between the wireless module of the access point and the WLAN controller is completed by using the periodic signal. On the basis of completing time synchronization of the wireless module and the networking framework, the WLAN controller can control scheduling of data receiving and transmitting by the access points in the networking, so that cooperation of the access points in the networking is improved, and throughput of the whole network is improved. The resource is intensively scheduled in the networking, so that the total throughput of networking concurrency can be improved, and the air interface conflict can be reduced. It should be understood that the module in the access point performs time synchronization and/or frequency synchronization with the WLAN controller, that is, the module in the access point may be regarded as performing time synchronization and/or frequency synchronization with the networking architecture, which is not particularly limited in the present application. With reference to the first aspect, in certain implementations of the first aspect, the first frequency signal includes a periodic signal. The method further includes determining a first timestamp of a second sub-signal of the first frequency signal from the first sub-signal of the first frequency signal. The second sub-signal is generated after the first sub-signal, and the first time stamp is used for completing time synchronization between the wireless module and the control module of the access point. Based on the technical scheme, the time synchronization between the wireless module of the access point and the WLAN controller is completed by using the periodic signal. And the wireless module of the access point performs time refreshing by acquiring the frequency of the square wave signal to finish time synchronization. It should be understood that the first frequency signal includes a square wave signal, a sawtooth wave signal, and a pulse signal lamp, which is not particularly limited in the present application. It will be appreciated that the first sub-signal of the first frequency signal comprises the signal of the nth period of the first frequency signal and the second sub-signal of the first frequency signal comprises the signal of the mth period of the first frequency signal, M being greater than N. By way of example and not limitation, wh