Throughput Enhancement through Efficient Channel Assignment in Multi-radio Ad Hoc Networks

Konferenz: networks 2006 - 12th International Telecommunications Network Strategy and Planning - Symposium
06.11.2006 - 09.11.2006 in New Delhi, India

Tagungsband: networks 2006

Seiten: 6Sprache: EnglischTyp: PDF

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Sangwan, Ashish; Dass, Ghanshyam; Saran, Huzur (Department of Computer Science, Indian Institute of Technology, Delhi 110016, India)
De, Pradipta (IBM, India Research Lab., Delhi 110016, India)

Use of a single wireless network interface on a device had been the standard practice for a long time due to hardware limitations. Designing a multi-hop ad hoc network with single NIC devices suffers from low bandwidth utilization due to co-channel interference. Recent advances in wireless device technology is spurring the emergence of several end user devices with multiple radios on them. Wireless access networks designed using these multi-radio devices has been shown to give manifold improvement in throughput compared to single channel networks. However, these works have mainly focused on a gateway-based mesh architecture. With growing number of multiradio end user devices, we envision a future where pure ad hoc communication among these devices will become commonplace without a specific structure. This paper provides a distributed solution to the channel assignment problem to multiple NICs in such an ad hoc scenario. The well-known routing protocols used in single channel scenario, namely AODV is used for route selection, but the potential for an improved routing algorithm for multi-channel case has been highlighted. We also provide an interface switching strategy so that the flows are not starved. We evaluate our channel assignment scheme through simulations on GloMoSim.