Methods and devices for multi-link communication

A multi-link communication method, performed by a multi-link station device, comprising:

• receiving a first message frame, wherein the first message frame comprises first information about a change in system information of an access point corresponding to at least one link of a plurality of links, and the change in the system information comprises a critical update occurring to a basic service set (BSS) parameter;
• determining a link with a change in system information based on the first message frame;
• and
• receiving a second message frame sent by the multi-link access point device to acquire changed system information,
• wherein the first information comprises a first identifier and a second identifier,
• the first identifier is configured to indicate the change in the system information on the at least one link of the plurality of links, an increment of a value of the first identifier indicates that the system information of the at least one link of the plurality of links is changed, and
• the second identifier corresponds to a plurality of bits, the plurality of bits correspond respectively to the plurality of links, and a value of a bit of the second identifier corresponding to a link of which the system information is changed among the plurality of links is set to a first value, the first value is 1.

A multi-link access point device, comprising:

• a processor, and
• a memory storing a computer program executable by the processor,
• wherein the processor is configured to:
• send a first message frame, wherein the first message frame comprises first information about a change in system information of an access point corresponding to at least one link of a plurality of links, the change in the system information comprises a critical update occurring to a basic service set (BSS) parameter, and the first message frame is used to indicate a station corresponding to the at least one link to receive a second message frame sent by the multi-link access point device to acquire changed system information;
• wherein the first information comprises a first identifier and a second identifier,
• the first identifier is configured to indicate the change in the system information on the at least one link of the plurality of links, an increment of a value of the first identifier indicates that the system information of the at least one link of the plurality of links is changed, and
• the second identifier corresponds to a plurality of bits, the plurality of bits correspond respectively to the plurality of links, and a value of a bit of the second identifier corresponding to a link of which the system information is changed among the plurality of links is set to a first value, the first value is 1.