Method, device and system for performing nav control on node and node

Abstract

The present invention discloses a method, a device and a system for performing NAV control on a node and a node. The method includes: updating a local NAV value to a preset first value when it is determined that a preset first field of a monitored MAC frame carries a first identity, wherein the first value is smaller than a current local NAV value and the MAC frame of which the preset first field carriers the first identity is transmitted by a TXOP responder after receiving a last MAC frame transmitted by a TXOP holder. The method, device, system and node may enable a hidden station to enter a channel access competition state timely, thereby solving a problem of regional discrimination of a station.

What is claimed is: 
     
         1 . A method for performing network allocation vector (NAV) control on a node, the method comprising:
 receiving, by a transmit opportunity (TXOP) responder, a media access control (MAC) frame transmitted by a TXOP holder; and   transmitting, by the TXOP responder, a MAC response frame corresponding to the MAC frame to the TXOP holder when the MAC frame is a last MAC frame transmitted by the TXOP holder, wherein a preset first field of the MAC response frame carries a first identity, and the first identity is used for instructing a node monitoring the MAC response frame to update a local NAV value of the node to zero.   
     
     
         2 . The method according to  claim 1 , wherein the node is a hidden node which is in the coverage of the TXOP responder but not in the coverage of the TXOP holder. 
     
     
         3 . The method according to  claim 1 , wherein the preset first field is a time length field. 
     
     
         4 . The method according to  claim 1 , further comprising:
 determining, by the TXOP responder, the MAC frame is a last MAC frame transmitted by the TXOP holder, according to a preset second field of the MAC frame.   
     
     
         5 . The method according to  claim 4 , wherein determining, by the TXOP responder, the MAC frame is a last MAC frame transmitted by the TXOP holder, according to a preset second field of the MAC frame, comprises:
 determining, by the TXOP responder, the MAC frame is the last MAC frame transmitted by the TXOP holder, when a value of a more data field is 0, wherein the preset second field is the more data field.   
     
     
         6 . A device of a transmit opportunity (TXOP) responder for performing network allocation vector (NAV) control on a node, comprising:
 a transceiver, configured to receive a media access control (MAC) frame transmitted by a TXOP holder; and   a processor, configured to control the transceiver to transmit a MAC response frame corresponding to the MAC frame to the TXOP holder when the MAC frame is a last MAC frame transmitted by the TXOP holder, wherein a preset first field of the MAC response frame carries a first identity, and the first identity is used for instructing a node monitoring the MAC response frame to update a local NAV value of the node to zero.   
     
     
         7 . The device according to  claim 6 , wherein the node is a hidden node which is in the coverage of the TXOP responder but not in the coverage of the TXOP holder. 
     
     
         8 . The device according to  claim 6 , wherein the preset first field is a time length field. 
     
     
         9 . The device according to  claim 6 , wherein the processor is further configured to:
 determine the MAC frame is a last MAC frame transmitted by the TXOP holder according to a preset second field of the MAC frame.   
     
     
         10 . The device according to  claim 9 , wherein the processor is further configured to:
 determine the MAC frame is the last MAC frame transmitted by the TXOP holder, when a value of a more data field is 0, wherein the preset second field is the more data field.