Optimized Link State Routing Protocol (OLSR)
Optimized Link State Routing Protocol (OLSR)
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DOI：
10.17487/rfc3626
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发表时间：
2003-10
期刊：
影响因子：
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通讯作者：
T. Clausen;P. Jacquet
中科院分区：
文献类型：
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作者：
T. Clausen;P. Jacquet
本文档描述了用于移动的ad hoc网络的优化链路状态路由（OLSR）协议。该协议是一个经典的链路状态算法的优化定制的移动的无线局域网的要求。该协议中使用的关键概念是多点中继（MPR）。MPR是在洪泛过程期间转发广播消息的选定节点。与经典的洪泛机制相比，这种技术大大减少了消息开销，在经典的洪泛机制中，每个节点在接收到消息的第一个副本时重传每个消息。在OLSR中，链路状态信息仅由被选为MPR的节点生成。因此，通过最小化在网络中泛洪的控制消息的数量来实现第二优化。作为第三优化，MPR节点可以选择仅报告其自身与其MPR选择器之间的链路。因此，与经典的链路状态算法相反，部分链路状态信息分布在网络中。然后，这些信息用于路线计算。OLSR提供最佳路由（就跳数而言）。该协议特别适用于大型和密集的网络，因为MPR技术在这种情况下工作得很好。
This document describes the Optimized Link State Routing (OLSR) protocol for mobile ad hoc networks. The protocol is an optimization of the classical link state algorithm tailored to the requirements of a mobile wireless LAN. The key concept used in the protocol is that of multipoint relays (MPRs). MPRs are selected nodes which forward broadcast messages during the flooding process. This technique substantially reduces the message overhead as compared to a classical flooding mechanism, where every node retransmits each message when it receives the first copy of the message. In OLSR, link state information is generated only by nodes elected as MPRs. Thus, a second optimization is achieved by minimizing the number of control messages flooded in the network. As a third optimization, an MPR node may chose to report only links between itself and its MPR selectors. Hence, as contrary to the classic link state algorithm, partial link state information is distributed in the network. This information is then used for route calculation. OLSR provides optimal routes (in terms of number of hops). The protocol is particularly suitable for large and dense networks as the technique of MPRs works well in this context.