A Direction-Dependent Mobile Terminal Sleep Mode Operation Scheme

Hongkui SHI  Mengtian RONG  Ping LI  

IEICE TRANSACTIONS on Communications   Vol.E90-B   No.9   pp.2596-2599
Publication Date: 2007/09/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.9.2596
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Network
sleep mode operation,  discontinuous reception (DRX),  power saving,  instant messaging service (IMS),  

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Based on the mutuality between arrival moments of uplink and downlink messages, this paper proposes a scheme that assigns different time-out thresholds for mobile terminal sleep mode operation according to the direction of the message just processed. Simulation results prove that, this approach can increase the power saving factor of a mobile terminal without degrading QoS.