WO-2026091994-A1 - COMMUNICATION METHOD AND APPARATUS, AND STORAGE MEDIUM

Abstract

The present application relates to the field of communications, and discloses a communication method and apparatus, and a storage medium. The method is applied to a master access point in a communication system. The communication system further comprises a first slave access point and a second slave access point. A station accesses the first slave access point. The method comprises: receiving a first roaming message, the first roaming message comprising context information of a service transmitted between the station and the first slave access point; and sending a second roaming message to the second slave access point, the second roaming message comprising the context information, and the context information being used for the second slave access point to transmit the service of the station. The present application can avoid service interruption.

Inventors

• SUN, YANBIN
• CHEN, Yunman
• WU, Xuming

Assignees

• 华为技术有限公司

Dates

Publication Date

20260507

Application Date

20250923

Priority Date

20241104

Claims (20)

1. A communication method, characterized in that the method is applied to a main access point of a communication system, the communication system further comprising a first slave access point and a second slave access point, wherein a station accesses the first slave access point, the method comprising: Receive a first roaming message, the first roaming message including context information of the service transmitted between the site and the first access point; A second roaming message is sent to the second access point, the second roaming message carrying the context information, the context information being used by the second access point to transmit the services of the site.
2. The method as described in claim 1, wherein receiving the first roaming message includes: When the site moves to the coverage area of the second access point, an acquisition request message is sent to the first access point, the acquisition request message being used to request the context information; Receive the first retrieval response message sent from the access point, the retrieval response message including the context information.
3. The method as described in claim 1, wherein receiving the first roaming message includes: When the site moves to the coverage area of the second access point, an update request message sent by the first access point is received, the update request message including the context information.
4. The method according to any one of claims 1-3, wherein the context information in the first roaming message includes one or more of the following: key update information used to transmit the service, the dormant state of the site, the sequence number of the first message in the sending window, the sequence number of the last message in the sending window, the sequence number of the first message in the receiving window, the sequence number of the last message in the receiving window, the bitmap of the receiving window, or the sequence number of the first message not sent from the access point to the site; The service includes downlink service sent from the first access point to the site and/or uplink service received from the site by the first access point. The sending window is the window used by the first access point to send the downlink service message to the site, and the receiving window is the window used by the first access point to receive the uplink service message from the site. The bitmap is used to describe the receiving status of the messages included in the receiving window.
5. The method according to any one of claims 1-3, wherein the communication system includes a fiber-to-the-room (FTTR) system, the master access point is a master FTTR device included in the FTTR system, and the first slave access point and the second slave access point are slave FTTR devices included in the FTTR system.
6. The method as described in any one of claims 1-5, wherein the first roaming message is a service closure completion message, and the second roaming message is a service start indication.
7. The method according to any one of claims 1-6, wherein the context information includes at least one of the following: message sequence number, IP message identifier, and OMI status information of the site.
8. The method according to any one of claims 1-7, characterized in that the method further comprises: Send a first multicast key synchronization message to the first slave access point and the second slave access point. The first multicast key synchronization message includes one or more of the following parameters: multicast key, length of the multicast key, integrity group temporary key IGTK, length of the IGTK, random number Gnonce, receive sequence counter RSC or key replay counter.
9. A communication method, characterized in that the method is applied to a main access point of a communication system, the communication system further comprising a first slave access point and a second slave access point, wherein a station accesses the first slave access point, the method comprising: Receive a third roaming message, the third roaming message including connection information establishing a connection between the site and the first access point; A fourth roaming message is sent to the second access point, the fourth roaming message including the connection information, the connection information being used by the second access point to establish a connection with the site.
10. The method as described in claim 9, wherein the connection information in the third roaming message includes one or more of the following: aggregation information used to transmit the service or key information used to transmit the service.
11. The method as described in claim 9 or 10, wherein the communication system includes a fiber-to-the-room (FTTR) system, the master access point is a master FTTR device included in the FTTR system, and the first slave access point and the second slave access point are slave FTTR devices included in the FTTR system.
12. The method according to any one of claims 9-11, wherein the connection information in the third roaming message includes one or more of the following: a reassociation request message received from the site by the first access point, an association request message received from the site by the first access point, or an authentication request message received from the site by the first access point.
13. The method as described in any one of claims 12, wherein the third roaming message is an association request reporting message, and the fourth roaming message is an association request sending message.
14. The method according to any one of claims 9-13, characterized in that the method further comprises: Send a first multicast key synchronization message to the first slave access point and the second slave access point. The first multicast key synchronization message includes one or more of the following parameters: multicast key, length of the multicast key, integrity group temporary key IGTK, length of the IGTK, random number Gnonce, receive sequence counter RSC or key replay counter.
15. A communication method, characterized in that the method is applied to a second slave access point of a communication system, the communication system further comprising a master access point and a first slave access point, wherein a station accesses the first slave access point, the method comprising: Receive a second roaming message sent by the primary access point, the second roaming message including context information of the service transmitted between the site and the first secondary access point; The site's services are transmitted based on the context information.
16. The method as described in claim 15, wherein the context information includes one or more of the following: key update information used to transmit the service, the dormant state of the site, the sequence number of the first message in the sending window, the sequence number of the last message in the sending window, the sequence number of the first message in the receiving window, the sequence number of the last message in the receiving window, the bitmap of the receiving window, or the sequence number of the first message not sent from the access point to the site. The service includes downlink service sent from the first access point to the site and/or uplink service received from the site by the first access point. The sending window is the window used by the first access point to send the downlink service message to the site, and the receiving window is the window used by the first access point to receive the uplink service message from the site. The bitmap is used to describe the receiving status of the messages included in the receiving window.
17. The method as described in claim 15, wherein the context information includes at least one of the following: message sequence number, IP packet identifier, sequence number (SN) context information, or the OMI status information of the site.
18. The method as described in claim 17, wherein transmitting the site's services based on the context information includes: Send a downlink message to the station according to the message sequence number; or... Send an aggregated message to the site based on the SN context information; or... The channel bandwidth and number of streams are determined based on the OMI status information of the site.
19. The method as described in claim 16, wherein transmitting the site's services based on the context information includes: If the hibernation state is used to indicate that the station is in a sleep state, then the station is awakened; and/or, Based on the sequence number of the first message in the sending window, the sequence number of the last message in the sending window, and/or the sequence number of the first message not sent from the access point to the site, the message to be sent belonging to the downlink service is determined; or, Based on the sequence number of the first message in the receive window, the sequence number of the last message in the receive window, and the bitmap of the receive window, the station is instructed to determine the messages to be sent that belong to the uplink service; and/or, The multicast data to be sent to the site is encrypted based on the key update information.
20. The method according to any one of claims 15-19, characterized in that the method further comprises: Receive a first multicast key synchronization message, which includes one or more of the following parameters: multicast key, length of the multicast key, integrity group temporary key IGTK, length of the IGTK, random number Gnonce, receive sequence counter RSC or key replay counter. Send a second multicast key synchronization message to the site, the second multicast key synchronization message including some or all of the parameters in the first multicast key synchronization message.

Description

Communication methods, devices and storage media This application claims priority to Chinese Patent Application No. 202411565237.4, filed November 4, 2024, entitled "Communication Method, Apparatus and Storage Medium"; this application claims priority to Chinese Patent Application No. 202510042548.0, filed January 9, 2025, entitled "Communication Method, Apparatus and Storage Medium"; and this application claims priority to Chinese Patent Application No. 202510223012.9, filed February 26, 2025, entitled "Communication Method, Apparatus and Storage Medium", the entire contents of which are incorporated herein by reference. Technical Field This application relates to the field of communications, and in particular to a communication method, apparatus and storage medium. Background Technology A wireless local area network (WLAN) may include multiple access points that can provide access services. Stations (STAs) within the coverage area of the WLAN can connect to one access point. For ease of explanation, this access point will be referred to as the first access point. STAs can transmit services with the first access point. In a wireless LAN, a STA (Station) can move, potentially from the coverage area of a first access point to the coverage area of a second access point. In this case, the STA can switch its access point from the first to the second. After switching to the second access point, the STA needs to resume service transmission on that second access point. However, in related technologies, it takes a considerable amount of time to resume service transmission on the second access point, which may cause service interruption. Summary of the Invention This application provides a communication method, apparatus, and storage medium to avoid service interruption. The technical solution is as follows: In a first aspect, this application provides a communication method applied to a primary access point of a communication system. The communication system further includes a first secondary access point and a second secondary access point. A site is connected to the first secondary access point, and the site is located within the coverage area of the second secondary access point. In the method, a first roaming message is received, which includes context information of services transmitted between the site and the first secondary access point. A second roaming message is sent to the second secondary access point, carrying the context information of the services used by the second secondary access point to transmit the site's services. Since the site is connected to the first secondary access point and transmits services with it, when the site moves to the coverage area of the second secondary access point, the primary access point can receive the first roaming message sent by the first secondary access point and send a second roaming message to the second secondary access point. Because the second roaming message includes context information describing the services transmitted between the site and the first secondary access point, when switching the access point the site connects to from the first secondary access point to the second secondary access point, the transmission of the site's services can be resumed on the second secondary access point based on the context information, avoiding interruption of the site's services and achieving seamless roaming. In one possible implementation, when a site moves into the coverage area of a second access point, it sends a request message to the first access point, requesting the context information. The primary access point then receives a response message from the first access point, which includes the context information. This allows the primary access point to proactively obtain the context information, enriching the methods and flexibility for acquiring it. In another possible implementation, when the site moves to the coverage area of the second access point, it receives an update request message from the first access point, which includes the context information. This allows the primary access point to passively receive the context information, enriching the methods and flexibility for obtaining it. In another possible implementation, the context information in the first roaming message includes one or more of the following: key update information used for the transmission service, the station's sleep state, the sequence number of the first message in the sending window, the sequence number of the last message in the sending window, the sequence number of the first message in the receiving window, the sequence number of the last message in the receiving window, a bitmap of the receiving window, or the sequence number of a message that the first access point did not send to the station. The service includes downlink services sent from the first access point to the station and/or uplink services received from the station by the first access point. The sending window