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Route Cache Based Load Balancing Scheme for MobileAd-Hoc Networks

机译：MobileAd-Hoc网络基于路由缓存的负载均衡方案

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摘要

Recently, many on demand routing protocols are suggested to support mobile ad hoc network (MANET) which is self-organized network. The most represented protocols are on-demand routing schemes such as DSR and AODV. These protocols set up routing paths by flooding Route Request (RREQ) packets during route discovery procedure and receive Route Reply (RREP) packets from destination nodes. In order to reduce route discovery latency, every node may use the previous routing information in its route cache and reply RREP instead of the destination. Although the route cache mechanism is simple and efficient approach to enhance the performance, it may result in unnecessary latency when it uses incorrect cache information. In addition, a certain node located around source can be easily congested because it replies every RREQ with RREP and all data flows are concentrated on this node. In this paper, we suggest a dynamic cache monitoring scheme and suppress RREP on heavily congested node to achieve load balancing. To do this, we have defined appropriate queue threshold values and parameters for congestion resolution. We also propose a solution for RREP storm problem which is another side effect of the route cache. Finally throughout the simulation, we have illustrated that proposed scheme shows better performance than the standard algorithm in heavily congested environments.
机译：最近，提出了许多按需路由协议来支持自组织网络移动自组织网络（MANET）。最具代表性的协议是按需路由方案，例如DSR和AODV。这些协议通过在路由发现过程中泛洪路由请求（RREQ）数据包来设置路由路径，并从目标节点接收路由答复（RREP）数据包。为了减少路由发现等待时间，每个节点都可以在其路由缓存中使用先前的路由信息​​并答复RREP而不是目的地。尽管路由缓存机制是提高性能的简单有效的方法，但是当它使用不正确的缓存信息时，可能会导致不必要的等待时间。另外，位于源周围的某个节点很容易拥塞，因为它用RREP答复每个RREQ，并且所有数据流都集中在该节点上。在本文中，我们提出了一种动态高速缓存监视方案，并在严重拥塞的节点上抑制RREP以实现负载平衡。为此，我们为拥塞解决定义了适当的队列阈值和参数。我们还提出了RREP风暴问题的解决方案，这是路由缓存的另一个副作用。最后，在整个仿真过程中，我们说明了在严重拥塞的环境中，该方案比标准算法具有更好的性能。

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