Coexistence of stations capable of different modulation...

Details Coexistence of stations capable of different modulation... Coexistence of stations capable of different modulation...

2007-09-25

2007-09-25

Pham, Brenda (Department: 2616)

Multiplex communications

Channel assignment techniques

Carrier sense multiple access

C370S389000

Reexamination Certificate

active

10278288

ABSTRACT:
A local-area network is provided where a plurality of OFDM stations and DSSS/CCK-only stations coexist. A beacon signal having a contention-free-period (CFP) is transmitted from an access point to the plurality of stations. The OFDM-modulated data is transmitted to the plurality of stations before the CFP ends, and after the CFP period ends, the DSSS/CCK-modulated data is transmitted, thereby preventing collisions between the stations.

REFERENCES:
patent: 6990116 (2006-01-01), Young et al.
patent: 2003/0128684 (2003-07-01), Hirsch et al.

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