Patent ID: 8223639
Filing Date: 2012-07-17
Classification: H04W

Abstract:
1. A method of communicating in a contention-based communication network, comprising: obtaining, by a transmission opportunity (TXOP) holder, a TXOP that is an interval of time when the TXOP holder has a right to initiate data exchange sequences onto a wireless medium; and initiating, by the TXOP holder, a truncation sequence for truncating the TXOP by transmitting a contention free (CF)-End frame indicating completion of the TXOP if the TXOP holder has no more data available to be sent during the TXOP, wherein the CF-End frame includes a duration field indicating a time required to complete the truncation sequence, and wherein a value k of the duration field is computed as below: where i denotes 1, 2 or 3, tcf denotes a transmission time of the CF-End frame and s denotes a Short Inter-Frame Space.