多径多描述编码在OLSR中的实现
Implementation of Multipath and Multiple Description Coding in OLSR
摘要:
本文讨论了OLSR的多路径路由和多描述编码(MDC)扩展(MP-OLSR)的应用和实现。它基于链路状态算法,并采用周期性的消息交换来维护网络的拓扑信息。同时,它以按需方式更新路由表,并在源端确定的多条路径上转发数据包。如果检测到链路故障,算法会自动恢复路由。针对无线网络的不稳定性,采用多描述编码来提高网络传输的可靠性,并提出了几种在不同路径上分配冗余的方法。NS 2仿真结果表明,新协议能有效地提高网络的性能。最后给出了MP-OLSR的实现方案。
英文摘要:
In this paper we discussed the application and the implementation of multipath routing and multiple description coding (MDC) extension of OLSR, called MP-OLSR. It is based on the link state algorithm and employs periodic exchange of messages to maintain topology information of the networks. In the mean time, it updates the routing table in an on-demand scheme and forwards the packets in multiple paths which have been determined at the source. If a link failure is detected, the algorithm recovers the route automatically. Concerning the instability of the wireless networks, the multiple description coding is used to improve reliability of the network transmission, and several methods are proposed to allocate the redundancy in different paths. The simulation in NS2 shows that the new protocol can effectively improve the performance of the networks. The implementation of MP-OLSR is also proposed in the end.
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