Name
Abstract | ||
|---|---|---|
Data transmission over WiFi quickly drains the batteries of mobile devices. Although the IEEE 802.11 standards provide power save mode (PSM) to help mobile devices conserve energy, PSM fails to bring expected benefits in many real scenarios. In particular, when multiple PSM mobile devices associate to a single access point (AP), PSM does not work well under transmission contention. Optimizing power saving of multiple PSM clients is a challenging task, because each PSM client expects to complete data transmission early so that it can turn to low power mode. In this paper, we define an energy conserving model to describe the general PSM traffic contention problem. We prove that the optimization of energy saving for multiple PSM clients under constraint is an NP-complete problem. Following this direction, we propose a solution called harmonious power saving mechanism (HPSM) to address one specific case, in which multiple PSM clients associate to a single AP. In HPSM, we first use a basic sociological concept to define the richness of a PSM client based on the link resource it consumes. Then, we separate these $poor$ PSM clients from $rich$ PSM clients in terms of link resource consumption and favor the former to save power when they face PSM transmission contention. We implement prototypes of HPSM based on the open source projects Mad-wifi and NS-2. Our evaluations show that HPSM can help the $poor$ PSM clients effectively save power while only slightly degrading the rich PSM clients’ performance in comparison with the existing PSM solutions. |
Year | DOI | Venue |
|---|---|---|
2016 | 10.1109/TWC.2016.2595558 | IEEE Trans. Wireless Communications |
Keywords | Field | DocType |
IEEE 802.11 Standard,Mobile handsets,Data communication,Batteries,Wireless communication,Optimization,NP-complete problem | Resource consumption,Power saving,NP-complete,Wireless,Data transmission,Computer network,Real-time computing,Mobile device,Mathematics | Journal |
Volume | Issue | ISSN |
15 | 10 | 1536-1276 |
Citations | PageRank | References |
0 | 0.34 | 20 |
Authors | ||
5 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Dachuan Liu | 1 | 0 | 0.34 |
| Haining Wang | 2 | 2574 | 160.07 |
| Gang Zhou | 3 | 2597 | 176.60 |
| Weizhen Mao | 4 | 474 | 31.58 |
| Boyang Li | 5 | 82 | 12.61 |