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

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4 Author(s)
Ashish Sangwan ; Department of Computer Science, Indian Institute of Technology, Delhi 110016, India. ; Ghanshyam Dass ; Pradipta De ; Huzur Saran

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 are 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 gateway-based mesh architecture. With growing number of multi-radio 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 are 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

Published in:

Networks 2006. 12th International Telecommunications Network Strategy and Planning Symposium

Date of Conference:

Nov. 2006