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ThinkMind // International Journal On Advances in Telecommunications, volume 3, numbers 3 and 4, 2010 // View article tele_v3_n34_2010_3


User Equipment Energy Efficiency versus LTE Network Performance

Authors:
Kari Aho
Tero Henttonen
Jani Puttonen
Lars Dalsgaard
Tapani Ristaniemi

Keywords: DRX, VoIP, Battery savings, Energy Efficiency, Capacity, CQI, Preamble, Adaptivity

Abstract:
The purpose of this article is to analyze the trade-off conditions between battery saving opportunities at the user terminal and Long Term Evolution network performance. To achieve the goal Voice over IP with discontinuous reception and a vast amount of different settings, including on duration, inactivity and discontinuous reception cycle timers, have been studied. An adaptive discontinuous reception with synchronizing the on duration time with the Voice over IP packet arrival has been proposed to minimize the delays caused by discontinuous reception. In addition, a channel quality indicator preamble time has been introduced to enable channel quality indicator update prior the on duration period. The quality of service and battery saving opportunities have been evaluated with a dynamic system simulator enabling detailed simulation of multiple users and cells with realistic assumptions. It can be concluded that high battery saving, i.e. increased talk-time opportunities, can be achieved without compromising the performance when discontinuous reception is properly adapted. Adaptive discontinuous reception and channel quality indicator preamble can effectively mitigate the capacity loss when more stricter DRX settings enabling higher energy efficiency at the terminal are applied.

Pages: 27 to 38

Copyright: Copyright (c) to authors, 2010. Used with permission.

Publication date: April 6, 2011

Published in: journal

ISSN: 1942-2601

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