Wireless access system

Details Wireless access system Wireless access system

2004-12-03

2008-10-21

Anderson, Matthew D. (Department: 2618)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S312000, C370S348000, C370S349000, C370S389000, C370S400000, C370S466000, C370S469000, C455S522000, C455S444000

Reexamination Certificate

active

07440432

ABSTRACT:
A wireless access system is provided which prevents the occurrence of a hidden terminal problem and minimizes the reduction in throughput. In the wireless access system, an access point divides terminals into groups such that terminals in one group cannot recognize radio waves sent from terminals in another group, and performs communication with the terminals on a per-group basis. By this, the wireless access system avoids the occurrence of the hidden terminal problem. RTS/CTS packets used to avoid the occurrence of the hidden terminal problem are exchanged between the access point and the terminals on a per-group basis, whereby overhead is reduced and the reduction in throughput is minimized.

REFERENCES:
patent: 6393032 (2002-05-01), Ikegami
patent: 2002/0167920 (2002-11-01), Miyazaki et al.
patent: 2004/0233877 (2004-11-01), Lee et al.
patent: 6-197071 (1994-07-01), None
patent: 2001-244939 (2001-09-01), None
patent: 2002-64505 (2002-02-01), None
patent: 2002-217913 (2002-08-01), None
patent: 02/089413 (2002-11-01), None

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