Page 157 - 《软件学报》2021年第8期

软件学报 ISSN 1000-9825, CODEN RUXUEW E-mail: jos@iscas.ac.cn
Journal of Software,2021,32(8):2439−2456 [doi: 10.13328/j.cnki.jos.006192] http://www.jos.org.cn
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一种基于功率调控的 WiFi Direct 节能优化机制

郭镇北, 李福亮, 梁博成, 张小瑞, 孙 磊

(东北大学 计算机科学与工程学院,辽宁 沈阳 110819)
通讯作者: 李福亮, E-mail: lifuliang@cse.neu.edu.cn

摘 要: WiFi Direct(WFD)是安卓系统广泛支持的 Device-to-Device(D2D)通信技术.相比于蓝牙,WFD 在传输速率
和连接距离上更具优势;同时,WFD 能够比 WiFi 热点更快速地创建连接.因此被广泛应用于构建 D2D 通信网络,用
以支持边缘计算、流量卸载、移动众包等研究.但是 WFD 同时带来了更高的能耗,而能耗仍然是电池受限的嵌入式
设备所关注的主要问题.现有的研究关注 WFD 的性能测量和组网技术,很少有对其能耗的研究.提出了一种基于功
率调控的 WFD 节能机制.该机制对 WFD 默认节能算法进行了补充和优化.首先,搭建了一个基于 WFD 的 D2D 通
信组,并对 WFD 默认节能机制进行了测量分析,测量结果表明,组主的消耗始终要高于组员的消耗.然后,详细阐述了
所提出的 WFD 节能机制.该机制能够降低设备的传输能耗,并通过切换设角色来平衡组主的能耗.最后,仿真实验结
果表明,该机制降低了 11.86%的能耗,同时只损失了 2%的吞吐量.
关键词: 安卓;嵌入式;WiFi Direct;节能;功率调控
中图法分类号: TP393

中文引用格式: 郭镇北,李福亮,梁博成,张小瑞,孙磊.一种基于功率调控的 WiFi Direct 节能优化机制.软件学报,2021,32(8):
2439−2456. http://www.jos.org.cn/1000-9825/6192.htm
英文引用格式: Guo ZB, Li FL, Liang BC, Zhang XR, Sun L. Energy-saving optimization mechanism for WiFi Direct based on
power control. Ruan Jian Xue Bao/Journal of Software, 2021,32(8):2439−2456 (in Chinese). http://www.jos.org.cn/1000-9825/
6192.htm

Energy-saving Optimization Mechanism for WiFi Direct Based on Power Control

GUO Zhen-Bei, LI Fu-Liang, LIANG Bo-Cheng, ZHANG Xiao-Rui, SUN Lei
(School of Computer Science and Engineering, Northeastern University, Shenyang 110819, China)
Abstract: WiFi Direct (WFD) supported by Android has been widely used in device-to-device (D2D) communications. Compared with
Bluetooth, WFD has advantages in data transmission rate and connection distance. At the same time, WFD can quickly create a connection
than WiFi HotSpot. Therefore, it is widely used to form D2D communication networks and support edge computing, traffic offloading,
mobile crowdsourcing, and other studies. However, it brings high energy consumption simultaneously, which is still a major concern for
battery-constrained devices. Existing studies pay more attention to measuring and optimizing the performance of WFD-based networks,
while few studies focus on the energy consumption. In this study, an energy-saving mechanism for the WFD based on power control is
proposed, which makes a supplement to the default energy-saving mechanism of WFD. First of all, this study constructs a WFD-based
communication group and a measurement analysis of the default energy-saving mechanism. Measurement results show that the energy
consumption of the group owner is always higher than that of the group member. Then, the proposed energy-saving mechanism is
described in detail, which can reduce the transmission consumption of devices and balance the energy consumption of the group owner by
switching the role of the devices. At last, the proposed mechanism is evaluated with simulation experiments, and results show that the
proposed mechanism can reduce 11.86% energy consumption with a throughput loss of 2%.

∗ 基金项目: 国家重点研发计划(2018YFB1702000)
Foundation item: National Key Research and Development Program of China (2018YFB1702000)
本文由“泛在嵌入式智能系统”专题特约编辑郭兵教授、王泉教授、邓庆绪教授、陈铭松教授、张凯龙副教授推荐.
收稿时间: 2020-07-24; 修改时间: 2020-09-07; 采用时间: 2020-11-02; jos 在线出版时间: 2021-02-07