Channel assignment in multi-channel wireless ad hoc networks.

摘要

Many research efforts on wireless ad hoc networks are based on a single channel. Multi-channel is a promising approach to increasing network capacity. This thesis proposed two network layer channel assignment solutions - proactive Receiver-based Channel Assignment (RCA) and on-demand Negotiation-based Channel Assignment (NCA). A multi-interface node structure is designed to support RCA and NCA. Each wireless node has a dedicated control interface and dual data interfaces. Optimized Link State Routing protocol is extended to support the proposed solutions, but the routing algorithm is decoupled with the channel control. RCA assigns a channel to each node based on node topology only. NCA considers both topology and traffic pattern information. Based on simulation with ns2 [NS2], Both RCA and NCA have better performance than that of the single channel approach, and NCA performs better and requires less channel resources than RCA.