| Summary: | 碩士 === 國立交通大學 === 電信工程系所 === 94 === There has been an increasing demand for applications to support multicast communication in the mobile ad hoc networks. One of the primary concerns in the multicast communication is the feasible design of the multicast ad hoc routing protocols. Conventionally, the design of the
multicast routing protocols can be categorized into the tree-based and the mesh-based schemes. These two types of protocols have their own strength and weakness under different networking scenarios.
In this thesis, two multicast routing protocols are proposed. A Power-Controlled Hybrid Multicast Routing (PCHMR) protocol is a hybrid scheme, which consists of both the tree-based and the mesh-based structures. The route determination scheme of the PCHMR algorithm not only relies on the hop counts but also on the received power strength of
the neighborhood nodes. The proposed PCHMR algorithm is suitable for the dynamically changing network topologies, especially for the group mobility scenario. On the other hand, a Overhead-Reduced On Demand Multicast Routing (ORODMR) protocol, which reduces the control overhead in the conventional ODMRP algorithm, is proposed. The
ORODMR protocol uses the information from the multicast receivers to reduce the control overheads effectively. The ORODMR algorithm keeps the advantages of the original ODMRP algorithm and improves one of its primary drawbacks. Different conditions associated with the mobility
models are utilized in the simulations to evaluate the effectiveness of both the PCHMR and the ORODMR algorithms.
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