Research Of Channel Assignment And Routing Protocol In Mobile Ad Hoc Networks

In recent years, with the development of wireless network technology, more and more people begin research on the mobile Ad Hoc network because it is rapidly deployable and dynamically reconfigurable networks, and does not need fixed infrastructure. By adopting multi-channel technology, we can largely increase the network throughput. However, how to design a high-performance multi-channel routing protocol poses a new challenge to the researchers on Ad Hoc multi-channel technology.Channel assignment is the key of multi-channel design. In this thesis, we research the multi-channel routing protocol by using channel reuse technology. We introduce the idea of channel reuse in channel assignment, propose a channel reuse scheme and channel assignment algorithm in multi-channel ad hoc networks. The main creative point of this scheme is that channels are divided into groups, each with three data channels. Each node preferently selects the front free channel in the same group as the preceding node/link has used, which can let more channels be free.Two channel assignment schemes and routing protocols CA-AODV-R and CABL-AODV-R based on the channel reuse scheme are proposed in this thesis, which combine proposed channel assignment schemes with the classical AODV routing protocol. One uses the fixed channel assignment algorithm and another uses the direction link for channel assignment. By carrying channel information in RREQ and RREP/HELLO, the proposed protocols in this thesis could avoid frequently calling channel allocation algorithm. The simulation results show the two protocols that compare with the single-channel AODV protocol can enhance network throughput and packet delivery rate, and reduce the end-to-end delay of the network.