期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2013
卷号：1
期号：6
出版社：S&S Publications
摘要：Emerging dual-mode phones incorporate a Wireless LAN (WLAN) interface along with the traditionalcellular interface. The additional benefits of the WLAN interface are, however, likely to be outweighed by its greaterrate of energy consumption. This is especially of concern when real-time applications, that result in continuous traffic,are involved. WLAN radios typically conserve energy by staying in sleep mode. With real-time applications like datatransfer, this can be challenging since packets delayed above a threshold are lost. Moreover, the continuous nature oftraffic makes it difficult for the radio to stay in the lower power sleep mode enough to reduce energy consumptionsignificantly. In this work, I propose the GreenCall algorithm to derive sleep/ wake-up schedules for the WLAN radioto save energy during data transfer while ensuring that application quality is preserved within acceptable levels ofusers. I evaluate GreenCall on commodity hardware and study its performance over diverse network paths and describemy experiences in the process. I further extensively investigate the effect of different application parameters onpossible energy savings through trace-based simulations. I show that, in spite of the interactive, real-time nature of datatransfer, energy consumption during calls can be reduced by close to 80 percent in most instances.
关键词：wireless LANs; energy consumption; portable communication devices; Internet
