• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Journal on Selected Areas in Communications >100+ VoIP Calls on 802.11b: The Power of Combining Voice Frame Aggregation and Uplink-Downlink Bandwidth Control in Wireless LANs
【24h】

100+ VoIP Calls on 802.11b: The Power of Combining Voice Frame Aggregation and Uplink-Downlink Bandwidth Control in Wireless LANs

机译：802.11b上的100多个VoIP呼叫：无线局域网中结合语音帧聚合和上行链路-下行链路带宽控制的功能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The bandwidth efficiency of voice over IP (VoIP) traffic on the IEEE 802.11 WLAN is notoriously low. VoIP over 802.11 incurs high bandwidth cost for voice frame packetization and MAC/PHY framing, which is aggravated by channel access overhead. For instance, 10 calls with the G.729 codec can barely be supported on 802.11b with acceptable QoS - less than 2% efficiency. As WLANs and VoIP services become increasingly widespread, this inefficiency must be overcome. This paper proposes a solution that boosts the efficiency high enough to support a significantly larger number of calls than existing schemes, with fair call quality. The solution comes in two parts: adaptive frame aggregation and uplink/downlink bandwidth equalization. The former reduces the absolute number of MAC frames according to the link congestion level, and the latter balances the bandwidth usage between the access point (AP) and wireless stations. When used in combination, they yield superior performance, for instance, supporting more than 100 VoIP calls over an IEEE 802.11b link. The authors demonstrate the performance of the proposed approach through extensive simulation, and validate the simulation through analysis.
机译：众所周知，IEEE 802.11 WLAN上IP语音（VoIP）流量的带宽效率很低。 802.11上的VoIP会导致语音帧打包和MAC / PHY成帧的高带宽成本，这会因通道访问开销而加剧。例如，在802.11b上以可接受的QoS几乎不能支持10个使用G.729编解码器的呼叫-效率不到2％。随着WLAN和VoIP服务的日益普及，必须克服这种效率低下的问题。本文提出了一种解决方案，该解决方案可以以相当高的通话质量将效率提高到足以支持比现有方案大得多的通话数量。该解决方案分为两部分：自适应帧聚合和上行/下行带宽均衡。前者根据链路拥塞程度减少MAC帧的绝对数量，而后者则平衡接入点（AP）和无线站之间的带宽使用。结合使用时，它们可提供卓越的性能，例如，通过IEEE 802.11b链路支持100多个VoIP呼叫。作者通过广泛的仿真演示了所提出方法的性能，并通过分析验证了仿真。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号