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The Effect of Radio Propagation on Multimedia, Mobile, Multihop Networks: Models and Countermeasures


The exploding demand for nomadic computing and communication has led to a need for a wireless infrastructure which is fast deployable,possibly multihop, and capable of multimedia service support. Applications that could greatly benefit from suchsupport include disaster relief operations,next generation PCS(personal communication systems) services, and tactical mobile units in the military. Multimedia support in a wireless mobile radio network without a fixed infrastructure presents a challenge in many dimensions. Some of the considerations involve mobility,changing topology,multihop transmissions, and unpredictable radiochannel propagation. The paper consists of three parts: (1) Wireless Subnetwork Control: we describe a mobile, multimedia network protocol, Cluster TDMA. (2) Channel Propagation Model: we introduce a realistic channel simulation model. (3) Experimental results. The results show that channel propagation has a significant impact on algorithm performance. The main contributions of this paper are the development of a realistic radio propagation simulation model, and the investigation of techniques which can improve network performance in the face of adverse propagation effects. In this paper,we focus on radio channel propagation performance in a mobile environment and study its impact on the performance of specific channel access schemes and network algorithms for multimedia support.

Paper: PDF file of paper

Information & Date

Proceedings of IEEE SICON'97, , January. 1997


Eric Hsiao-Kuang Wu
Jack Tsai
Mario Gerla