Barekatain Behrang, Raahemifar Kaamran, Ariza Quintana Alfonso, Triviño Cabrera Alicia
Electrical & Computer Engineering Department, Ryerson University, Toronto, Ontario, Canada.
Dpto Tecnología Electrónica, E.T.S.I, Telecomunicación, University of Malaga, Malaga, Spain.
PLoS One. 2015 Mar 20;10(3):e0119679. doi: 10.1371/journal.pone.0119679. eCollection 2015.
Wireless Mesh Networks (WMNs) cannot completely guarantee good performance of traffic sources such as video streaming. To improve the network performance, this study proposes an efficient engineering solution named Wireless-to-Ethernet-Mesh-Portal-Passageway (WEMPP) that allows effective use of wired communication in WMNs. WEMPP permits transmitting data through wired and stable paths even when the destination is in the same network as the source (Intra-traffic). Tested with four popular routing protocols (Optimized Link State Routing or OLSR as a proactive protocol, Dynamic MANET On-demand or DYMO as a reactive protocol, DYMO with spanning tree ability and HWMP), WEMPP considerably decreases the end-to-end delay, jitter, contentions and interferences on nodes, even when the network size or density varies. WEMPP is also cost-effective and increases the network throughput. Moreover, in contrast to solutions proposed by previous studies, WEMPP is easily implemented by modifying the firmware of the actual Ethernet hardware without altering the routing protocols and/or the functionality of the IP/MAC/Upper layers. In fact, there is no need for modifying the functionalities of other mesh components in order to work with WEMPPs. The results of this study show that WEMPP significantly increases the performance of all routing protocols, thus leading to better video quality on nodes.
无线网状网络（WMN）无法完全保证诸如视频流等流量源的良好性能。为了提高网络性能，本研究提出了一种名为无线到以太网网状门户通道（WEMPP）的高效工程解决方案，该方案允许在WMN中有效利用有线通信。即使目标与源处于同一网络（内部流量），WEMPP也允许通过有线且稳定的路径传输数据。通过四种流行的路由协议（作为主动协议的优化链路状态路由或OLSR、作为反应式协议的动态MANET按需路由或DYMO、具有生成树能力的DYMO和HWMP）进行测试，即使网络大小或密度发生变化，WEMPP也能显著降低端到端延迟、抖动、节点上的争用和干扰。WEMPP还具有成本效益，并提高了网络吞吐量。此外，与先前研究提出的解决方案相比，WEMPP通过修改实际以太网硬件的固件即可轻松实现，而无需更改路由协议和/或IP/MAC/上层的功能。事实上，无需修改其他网状组件的功能即可与WEMPP配合使用。本研究结果表明，WEMPP显著提高了所有路由协议的性能，从而在节点上实现了更好的视频质量。
