Uplink access management

Details Uplink access management Uplink access management

2007-01-15

2011-12-20

Patel, Ajit (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S450000, C370S329000, C370S341000

Reexamination Certificate

active

08081975

ABSTRACT:
The invention involves uplink access management for user terminals (210, 220, 230, 240, 250, 260, 270) present in a same first cell (15) of a communication system (1) and participating in a communication session involving communication of user data on a common downlink channel to the terminals (210, 220, 230, 240, 250, 260, 270). When the terminals (210, 220, 230, 240, 250, 260, 270) want to respond to the user data transmission, they first have to request uplink access. According to the invention, at least one of the terminals (220, 230, 240) requests this uplink access using a request channel associated with a second (25, 35, 45) cell different from the current first cell (15). This reduces the risk of collision of uplink access requests on the request channel by distributing the requests over several cells (15, 25, 35, 45) instead of a single cell (15).

REFERENCES:
patent: 6707808 (2004-03-01), Vedrine
patent: 2005/0053029 (2005-03-01), Lee et al.
patent: 2009/0258647 (2009-10-01), Yamada et al.
patent: 2009/0323624 (2009-12-01), Kim
patent: 2010/0226263 (2010-09-01), Chun et al.
patent: WO 2007040978 (2007-04-01), None
patent: WO 2007102060 (2007-09-01), None
patent: WO 2007116227 (2007-10-01), None

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