Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-01-31
2006-01-31
Vo, Nguyen (Department: 2685)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S436000, C455S434000
Reexamination Certificate
active
06993341
ABSTRACT:
The present invention is directed to forward link and reverse link diversity in a wireless telecommunications network. The present invention solves the reverse link/forward link dependence between a mobile station and a base station of a network by purposely selecting different base stations or sectors of a base station for reverse-link and forward-link transmissions. In one embodiment, reverse link traffic channel transmissions are targeted to a different base station than the base station from which the forward link traffic channel transmissions originate and respective control information of these channels are embedded or transmitted with the opposite link. Such diversity may be activated only in signal conditions that have a certain predefined value or mobile station locations that exhibit a sufficient chance of experiencing a forward or reverse link failure. Activation of the diversity scheme may also depend on whether more than one base station or sector has link-quality within an appropriate range or the degrading effect of the increased power on capacity is acceptable.
REFERENCES:
patent: 5864760 (1999-01-01), Gilhousen et al.
patent: 6157668 (2000-12-01), Gilhousen et al.
patent: 6507572 (2003-01-01), Kumar et al.
patent: 2003/0195007 (2003-10-01), Hayashi et al.
Denso Corporation
Morrison & Foerster / LLP
Stein Julie E
Vo Nguyen
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