WLAN中基于IEEE 802.11u协议的终端节能功耗管理方案

doi:10.11959/j.issn.1000-0801.2019193

摘要/Abstract

摘要：

支持IEEE 802.11u标准的移动终端在无线局域网提供的网络服务覆盖范围内可自动接入无线局域网。针对IEEE 802.11u无线局域网的特点，提出了一种基于时间序列感知的PSM（S-PSM）方案。采用IEEE 802.11u标准中定义的公共广播服务（GAS）来广播传输序列信息，所有终端根据该序列信息相应地控制自身的工作状态。为了降低竞争信道的碰撞概率，引入了响应竞争窗口。当接入点（AP）中没有数据分组时，AP 广播GAS帧并激活空闲计时器。所有终端进入睡眠状态直到空闲计时器到期。仿真结果表明，与传统的PSM相比，该方案能显著降低功耗，提升终端能效。

关键词: IEEE802.11u标准, 节能, 传输序列, 公共广播服务

Abstract:

A mobile terminal supporting the IEEE 802.11u standard can automatically access a wireless local area network within the coverage of a network service provided by a wireless local area network.Aiming at the characteristics of IEEE 802.11u WLAN,a time series sensing based PSM (S-PSM) scheme was proposed.The transmission sequence information was broadcasted using a generic advertisement service (GAS) defined in the IEEE 802.11u standard,and all terminals controlled their own operating states according to the sequence information.In order to reduce the collision probability of the contention channel,a response contention window was introduced.When there was no data packet in the access point (AP),the AP broadcasted the GAS frame and activated the idle timer.All terminals went to sleep until the idle timer expires.The simulation results show that compared with the proposed traditional PSM,the scheme can significantly reduce power consumption and improve terminal energy-efficiency.

Key words: IEEE 802, 11u standard, power saving, transmission squence, generic advertisement service

中图分类号:

U285.2

张迪. WLAN中基于IEEE 802.11u协议的终端节能功耗管理方案[J]. 电信科学, 2019, 35(8): 88-96.

Di ZHANG. Schedule-aware power management for energy-efficiency improvement in IEEE 802.11u WLAN[J]. Telecommunications Science, 2019, 35(8): 88-96.

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参考文献 13

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仿真参数	参数值
用户数	2~14
数据传输速率	11 Mbit/s
数据分组大小	1 500 byte
PS-Poll帧大小	14 byte
ACK帧大小	14 byte
平均数据分组到达间隔	10/30/50 ms
一个时隙大小	20 μs
SIFS	20 μs
DIFS	50 μs
beacon周期	100 ms
监听周期	100 ms
睡眠状态能耗	50 mW
激活状态能耗	750 mW
空闲状态能耗	750 mW
AP缓存区大小	2 GB

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