This invention proposes a congestion state transmission method and related apparatus, relating to the field of communication technology. A memory unit stores the current flow
control function state and the pending flow
control function state corresponding to each receiving module. Initially, both the current flow
control function state and the pending flow control function state are in a disabled state. The memory unit can acquire state detection trigger events for the target receiving module. If the target current flow control function state and the target pending flow control function state of the target receiving module are different, a first congestion state is sent to the
media access controller according to the target pending flow control function state, and the target current flow control function state is updated according to the target pending flow control function state. The first congestion state characterizes the congestion state of the target receiving module, and the target pending flow control function state is set by the
central processing unit according to the flow control function setting instructions sent by the user, thus avoiding
atomicity issues.