Handoff method of wireless local area network (LAN)

Details Handoff method of wireless local area network (LAN) Handoff method of wireless local area network (LAN)

2007-10-30

2007-10-30

Taylor, Barry (Department: 2617)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S332000, C455S436000, C455S437000

Reexamination Certificate

active

10880511

ABSTRACT:
A handoff method of wireless LAN comprises the steps of: 1) immediately starting by a mobile terminal to count time from a time point of entering the wireless LAN or building the new association, that is, when building association with a certain access point; 2) always tracking a signal-to-noise ratio (SNR) of the old access point by the mobile terminal, and once the mobile terminal starts getting weak, starting to search for a near access point and making a preparation for handoff, and issuing a probe request signal to a new access point, and always responding to a probe response message by the new access point after receiving the probe request signal; and 3) judging by the mobile terminal whether or not to associate the new access point according to a signal strength and an association time of each of the access points, and if a judging result is yes, issuing the reassociation request signal to the new access point. Accordingly, the new access point issues a reassociation response message to build the new association.

REFERENCES:
patent: 2003/0119527 (2003-06-01), Labun et al.
patent: 2003/0139197 (2003-07-01), Kostic et al.

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