Patent ID: 7656854
Filing Date: 2010-02-02
Classification: H04W

Abstract:
1. A method comprising: receiving at a destination node in a Wireless Local Area Network (WLAN) a transmission request (CC-RTS) frame from a source node in said WLAN, said CC-RTS frame including a reservation duration value indicating the length of time needed for a transmission reservation; adjusting by each node that has heard the CC-RTS a timer indicating the period said node in said WLAN must refrain from transmitting on the channel (NAV) for a time period of a reservation duration of a transmission request/transmission response (CC-RTS/CC-CTS) handshake; determining by said destination node whether said CC-RTS has been accepted by said destination node; when said CC-RTS has not been accepted, then receiving a second CC-RTS frame having a reservation duration value of zero at said destination node from said source node; and when said CC-RTS is accepted by said destination node then extending said NAV to the reservation duration of the remainder of the reservation duration value of the original CC-RTS frame by said source node.