Patent ID: 9578658
Date: 2017-02-21
CPC Classifications: H04W

Claim:
1. A backoff method used for a lower priority access category (AC), comprising: detecting a transmission opportunity (TXOP) sharing state of the lower priority AC when the lower priority AC and another AC in a same station (STA) obtain a TXOP at a same time and an internal collision occurs, wherein detecting the TXOP sharing state of the lower priority AC comprises determining whether the lower priority AC is suitable for TXOP sharing according to a TXOP sharing standard, and wherein the TXOP sharing standard comprises at least one of an available amount of transmission capacity in the TXOP and an improvement to a total throughput of the TXOP; and executing a backoff of the lower priority AC according to the detected TXOP sharing state, wherein executing the backoff of the lower priority AC according to the detected TXOP sharing state comprises: bypassing a backoff procedure of the lower priority AC when detecting that the TXOP sharing state of the lower priority AC is TXOP sharing; and keeping a contention window (CW[AC]) of the lower priority AC unchanged and performing data transmissions when detecting that the TXOP sharing state of the lower priority AC is TXOP sharing.