一种按需式双信道的Ad Hoc网络路由方法

An On-demand Dual-Channel Routing Scheme in Ad Hoc Networks

为了提高AdHoc网络的信道带宽和降低通信时的相互影响,在单信道的AdHoc网络多路径路由方法基础上,提出了按需式的采用双信道的路由策略。在物理上,整个网络存在两个独立的信道。通过一次路由发现,获得两条节点不相交路径,按照每包分配策略,把数据交替在两个信道的不同路径上进行传输。在提高带宽的同时,降低了数据传输冲突,从而改善网络性能。

Based on a single channel multipath routing scheme, an on-demand routing scheme called Dual- Channel Routing（DCR）scheme is proposed in this paper. The scheme establishes and utilizes two routes of maximally disjoint paths and distributes them into two different channels respectively. Here, ＂channel＂ is used upon a logical level. Physically, a channel can be a frequency band（under FDMA）, or an orthogonal code（under CDMA）. Then, there is no interference between two routes. A per-packet allocation scheme is used to distribute data packets into two channels of active sessions in our scheme. Even if only one of the two routes of the session is invalidated, the source uses the remaining valid route to deliver data packets in two channels alternately. This traffic distribution efficiently utilizes available network resources and prevents nodes of the route from being congested in heavily loaded traffic situations. The results of simulation show that our scheme has better network performance.