Cross-layered OFDMA-based MAC and routing protocol for multihop adhoc networks
COMPUTATIONAL SCIENCE AND ITS APPLICATIONS, PT I(2013)
摘要
In this paper, a dynamic Sub-channel Assignment Algorithm (DSA) based on orthogonal frequency division multiple access (OFDMA) technology operating in the time division duplexing (TDD) and a new routing protocol are proposed. The proposed of dynamic Sub-channel Assignment Algorithm solves several drawbacks of existing radio resource allocation techniques in OFDM system used in ad-hoc and multi-hop networks, such as the hidden and exposed node problem, mobility, co-channels interference in frequency (CCI). An interference avoidance mechanism allows the system to reduce CCI and to operate with full frequency re-use. The proposed routing protocol is jointed with the MAC protocol based the algorithm to ensure the mobility and multi-hop, thus the quality of service in ad-hoc and multi-hop networks is significantly improved.
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关键词
orthogonal frequency division,multihop adhoc network,cross-layered ofdma-based mac,ofdm system,new routing protocol,multi-hop network,mac protocol,proposed routing protocol,full frequency re-use,dynamic sub-channel assignment algorithm,co-channels interference,interference avoidance mechanism
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