计算机工程与应用2011，Vol.47Issue(18)：73-75,3.DOI:10.3778/j.issn.1002-8331.2011.18.022
IEEE802.11e无线局域网中VoIP容量分析及改进
Analysis and improvement of VoIP capacity in IEEE 802.11e WLAN
摘要
Abstract
IEEE 802.11e provides the mechanism to distinguish the priority for different service flows,compared to other services it improves the priority of real-time services such as VoW(Voice over Internet Protocol) in WLAN(Wireless Local Area Network),so that its QoS requirement will be satisfied to some extents,because of not providing the different priority betwcen Move Host(MH) and Access Point(AP) in WLAN,the unbalance between uplink and downlink service flow on AP is induced,and then it leads to bottleneck, further more restricts the VoIP capacity. To solve this problem,a new strategy based on the analysis of the capacity of VoIP in WLAN is proposed to improve the switch in capacity of AP's channel. It usees the length of AP's queue to estimate whether the network is congested or not,and then modifies the Arbitration Inter-Frame Space(AIFS) of the service flows dynamically,modulates the priority of AP dynamically according to web congestion condition,to weaken the restriction of VoIP capacity caused by bottleneck of AP. The results of simulation show that the proposed scheme can increase VoIP capacity efficiently.关键词
802.11e标准/无线局域网/IP电话/语音容量Key words
802. 11e/Wireless Local Area Network(WLAN)/Voice over Internet Protocol(VoIP)/voice capacity分类
信息技术与安全科学引用本文复制引用
葛伦跃,吴其林,田一鸣,陆阳..IEEE802.11e无线局域网中VoIP容量分析及改进[J].计算机工程与应用,2011,47(18):73-75,3.基金项目
国家自然科学基金(the National Natural Science Foundation of China under Grant No.60873195) （the National Natural Science Foundation of China under Grant No.60873195）
教育部博士点专项基金 (N0.20090111110002) （N0.20090111110002）
安徽省高等学校优秀青年人才基金(No.2009SQRZ136) （No.2009SQRZ136）
安徽高等学校省级自然科学究项目(No.KJ2009B125). （No.KJ2009B125）
