本文分析了TORA 路由協(xié)議的性能隨節(jié)點密度變化的情況。針對該問題，在TORA 協(xié)議的基礎上引入負載均衡的思想和多速率機制，修改了協(xié)議的相關部分，優(yōu)化了路由選擇策略，提出了一種改進型路由協(xié)議TORA-A，并利用Opnet 網(wǎng)絡仿真軟件進行了仿真實驗。TORA-A 使路由協(xié)議性能在網(wǎng)絡節(jié)點密度較大情況下的惡化趨勢得到了較好的抑制，使無線自組網(wǎng)對節(jié)點密度變化的適應能力得到了進一步的提高。
關鍵詞 無線自組織網(wǎng)絡；節(jié)點密度；路由協(xié)議；改進；OPNET
Abstract This article gives a expatiation of the effect of nodes-density-variety on TORA. With a confirmed orientation of amelioration, this article modified the TORA routing protocol with an improved tactic of balanced load and multi-rate aware routing algorithm. Then it gives a new routing protocol named TORA-A and simulated it in OPNET. The result shows that the capacity of Ad hoc network is obviously improved and the TORA-A routing protocol provides a better adaptability of nodes-density-variety.
Keywords wireless ad hoc network; nodes density; routing protocol; ameliorate; OPNET