本文分析了TORA 路由協(xié)議的性能隨節(jié)點(diǎn)密度變化的情況。針對(duì)該問(wèn)題，在TORA 協(xié)議的基礎(chǔ)上引入負(fù)載均衡的思想和多速率機(jī)制，修改了協(xié)議的相關(guān)部分，優(yōu)化了路由選擇策略，提出了一種改進(jìn)型路由協(xié)議TORA-A，并利用Opnet 網(wǎng)絡(luò)仿真軟件進(jìn)行了仿真實(shí)驗(yàn)。TORA-A 使路由協(xié)議性能在網(wǎng)絡(luò)節(jié)點(diǎn)密度較大情況下的惡化趨勢(shì)得到了較好的抑制，使無(wú)線自組網(wǎng)對(duì)節(jié)點(diǎn)密度變化的適應(yīng)能力得到了進(jìn)一步的提高。
關(guān)鍵詞 無(wú)線自組織網(wǎng)絡(luò)；節(jié)點(diǎn)密度；路由協(xié)議；改進(jìn)；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