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Packet CDMA versus dynamic TDMA for multiple access in an integrated voice/data PCN

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4 Author(s)
N. D. Wilson ; David Sarnoff Res. Center, Princeton, NJ, USA ; R. Ganesh ; K. Joseph ; D. Raychaudhuri

A comparative evaluation of dynamic time-division multiple access (TDMA) and spread-spectrum packet code-division multiple access (CDMA) approaches to multiple access in an integrated voice/data personal communications network (PCN) environment are presented. After briefly outlining a cellular packet-switching architecture for voice/data PCN systems, dynamic TDMA and packet CDMA protocols appropriate for such traffic scenarios are described. Simulation-based network models which have been developed for performance evaluation of these competing access techniques are then outlined. These models are exercised with example integrated voice/data traffic models to obtain comparative system performance measures such as channel utilization, voice blocking probability, and data delay. Operating points based on typical performance constraints such as voice blocking probability 0.01 (for TDMA), voice packet loss rate 10-3 (for CDMA), and data delay 250 ms are obtained, and results are presented

Published in:

IEEE Journal on Selected Areas in Communications  (Volume:11 ,  Issue: 6 )