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Performance analysis of a channel load sensing protocol for CDMA packet radio networks with finite populations and variable length messages

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2 Author(s)
Judge, G. ; Dept. of Electron. Eng., Natal Univ., Durban, South Africa ; Takawira, F.

An analytical and simulation performance evaluation is presented for a proposed multi-access protocol for data traffic in a packet radio network. The network employs direct-sequence code division multiple access (DS-CDMA) in a centralised channel load-sensing scheme with channel overload (collision) detection and blocking. A finite population, packetisation of variable length messages and partial message retransmission scheme are considered in the protocol. For a given maximum bit error rate due to mutual multi-access interference (MAI), an upper threshold (β) for the number of users allowed in the channel can be determined. This paper proposes a second lower threshold, α, to improve the system performance by adding an access control mechanism. The results show that an improved throughput/delay performance can be obtained by implementing a centralised load sensing scheme and dynamic channel control mechanism

Published in:

Spread Spectrum Techniques and Applications, 1998. Proceedings., 1998 IEEE 5th International Symposium on  (Volume:1 )

Date of Conference:

2-4 Sep 1998

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