Hybrid Channel Access Scheduling in Ad Hoc Networks

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Hybrid Channel Access Scheduling in Ad Hoc Networks
We present the hybrid activation multiple access (HAMA) protocol for ad hoc networks. Unlike previous channel access scheduling protocols that activate either nodes or links only, HAMA is a node-activation channel access protocol that also maximizes the chance of link activations using time- and code-division schemes. HAMA only requires identifiers of the neighbors within two hops from each node to schedule channel access. Using this neighborhood information, each node determines whether to transmit in the current time slot on a dynamically assigned spreading code. A neighbor protocol supplements HAMA with up-to-date two-hop neighborhood information by reliably propagating the one-hop neighbor updates through a novel random access technique. The throughput and delay characteristics of HAMA in randomly-generated multihop wireless networks are studied by analyses and simulations. The results of the analyses show that HAMA achieves higher channel utilization in ad hoc networks than a di...
Lichun Bao, J. J. Garcia-Luna-Aceves
Added 14 Jul 2010
Updated 14 Jul 2010
Type Conference
Year 2002
Where ICNP
Authors Lichun Bao, J. J. Garcia-Luna-Aceves
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