Overlapping network allocation vector (ONAV) for avoiding...

Details Overlapping network allocation vector (ONAV) for avoiding... Overlapping network allocation vector (ONAV) for avoiding...

2007-01-16

2007-01-16

Nguyen, Chau (Department: 2616)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S447000, C370S461000, C370S462000

Reexamination Certificate

active

10029825

ABSTRACT:
The present invention is related to a medium access control (MAC) protocol for avoiding collisions among ESTAs when two or more overlapping basic service sets (OBSSs) co-exist and operate in the same channel. To achieve this, each mobile station operating under HCF maintains a first counter known as Network Allocation Vector (NAV) and a second counter known as Overlapping Network Allocation Vector (ONAV), which is updated within a mobile station by frames coming from OBSSs, during the Contention Free Period (CFP) or during a Contention Free Burst (CFB) granted by a polling frame. The mobile station uses the NAV to update only to the medium occupancy in its own BSS to ensure that the mobile station will not interfere with the transmissions in its own QBSS, while the ONAV is used to avoid collisions with the mobile stations from the OBSS.

REFERENCES:
patent: 7050420 (2006-05-01), Findikli
patent: 2003/0174664 (2003-09-01), Benveniste
patent: WO9835453 (1998-02-01), None

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