Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Reexamination Certificate
2011-08-09
2011-08-09
Ferguson, Keith (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
C455S517000, C455S550100, C455S574000, C455S343100, C455S343400, C370S310000, C370S311000, C709S203000, C709S212000, C709S213000, C709S228000, C709S229000
Reexamination Certificate
active
07996030
ABSTRACT:
A system and method for reducing call establishment delay in wireless network is provided, in which a network node establishes a call to a wireless terminal controlled by an AP via a server. The wireless terminal notifies the server of its listen interval. In the power saving mode, the wireless terminal wakes up every listen interval and listen the beacon to check whether any buffered packet for it. When the wireless terminal learns from the beacon that there are packets waiting, it communicates with the access point to retrieve them. The server records a listen time at which the wireless terminal will wake up and listen to the AP based on the listen interval. When a network node calls the wireless terminal, the server buffers the request for a time interval based on the listen time, and then sends the request to the wireless terminal.
REFERENCES:
patent: 7123700 (2006-10-01), Weaver et al.
patent: 2004/0013247 (2004-01-01), Kurokawa
patent: 2005/0138451 (2005-06-01), Simpson et al.
patent: 1 033 832 (2000-09-01), None
Hsu Hung-Chi
Hung Ting-Kai
Tsao Shiao-Li
Yu Tai-Xing
Bacon & Thomas PLLC
Ferguson Keith
Industrial Technology Research Institute
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