Periodic ranging in a wireless access system for mobile...

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail

Reexamination Certificate

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Details

C455S502000, C455S503000, C455S423000, C455S045000

Reexamination Certificate

active

11201229

ABSTRACT:
A method of performing a ranging process between a base station and a mobile station in sleep mode in a wireless access system, wherein the base station provides the mobile station with an initial notification of a periodic ranging time that occurs during a sleep time interval and during which the mobile station is to perform the ranging process, the initial notification included in a first message indicating whether the mobile station should terminate sleep mode to receive downlink data, and wherein the base station provides the mobile station with subsequent notifications of periodic ranging times that occur during the sleep time interval, the subsequent notifications indicated in a second message, the second message transmitted to the mobile station as part of the ranging process such that the mobile station performs a plurality of ranging processes within the sleep time interval.

REFERENCES:
patent: 6690655 (2004-02-01), Miner et al.
patent: 2002/0036985 (2002-03-01), Jonas et al.
patent: 2002/0191684 (2002-12-01), Min et al.
patent: 2004/0185852 (2004-09-01), Son et al.
patent: 2005/0030931 (2005-02-01), Sung et al.
patent: 2005/0041573 (2005-02-01), Eom et al.
patent: 2005/0049012 (2005-03-01), Chang et al.
patent: 2005/0058058 (2005-03-01), Cho et al.
patent: 2005/0075148 (2005-04-01), Park
patent: 2005/0162314 (2005-07-01), Bromley et al.
patent: 2005/0265376 (2005-12-01), Chapman et al.
patent: 2005/0272481 (2005-12-01), Kim
patent: 2005/0288022 (2005-12-01), Ryu et al.
“Periodic Ranging in Sleep Mode”, Son et al., IEEE C802. 16e-04/24, Mar. 5, 2004.

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