Scheme fast channel switching for IEEE 802.11 WLAN networks.

摘要

Method for switching at least one wireless node located within the coverage area of ​​a set of basic services (BSS1) or set of basic infrastructure services IBSS in a wireless local area WLAN from a first communication channel to a second channel communication, the method comprising the steps of: (a) determine if said second required communication channel is used by said at least one wireless node; (B) issuing by a source node (AP1) a management frame including a member (31) announcement channel switching CSAE to said at least one wireless node when it is determined in step (a) needed said second communication channel, including said CSAE (31) at least one switching time channel and an identifier of the second communication channel; and, (c) switching, at said at least one wireless node receiving said management frame including said CSAE (31), from said first communication channel adicho second communication channel within a countdown time corresponding back to said time channel switching, wherein in a first switching mode said channel-switch time indicates how many beacons appear before the channel switching is performed; characterized in that: the method includes: in a second switching mode, inserting in a field (33) switching mode in said management frame a code for selecting a mode of operation for performing fast channel switching in said WLAN; wherein in said second switching mode said channel-switch time is specified in microseconds independent of a beacon interval used.