NDLI: Throughput evaluation of a satellite switched CDMA (SS/CDMA) demand assignment system

Content Provider	IEEE Xplore Digital Library
Author	Gerakoulis, D. Wai Chung Chan Geraniotis, E.
Copyright Year	1998
Description	Author affiliation: AT&T Bell Labs., Whippany, NJ, USA (Gerakoulis, D.)
Abstract	This paper presents throughput evaluation of a satellite switched code division multiple access (SS/CDMA) system which operates under demand assignment control. The SS/CDMA provides both multiple access and switching to a geostationary multibeam satellite. Multiple access is resolved by space, frequency and code division. Space division is introduced by the multibeam antennae that provide frequency reuse in each beam. The spectrum is then channelized into frequency bands where each band is accessed by code division for both the uplink and the downlink. The satellite on-board performs the switching function which is also based on compatible code multiplexed switching. The switch may route both circuit calls and data packets which are assigned upon request. The on-board code division switch operates under the control of a channel assignment algorithm. We provide channel assignment algorithms for optimum, sub-optimum and random switch operation. Computer simulation has been used to evaluate the performance of the three algorithms. It is shown that their circuit call blocking probabilities are almost the same. The optimum algorithm achieves the minimum data packet delay, while the performance of the sub-optimum algorithm is slightly better than the random one. Furthermore, data packets may be routed via the switch with small delay, even with heavy load of circuit calls.
Starting Page	3632
Ending Page	3638
File Size	536048
Page Count	7
File Format	PDF
ISBN	0780349849
DOI	10.1109/GLOCOM.1998.775986
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-11-08
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Throughput Satellites Switches Frequency conversion Switching circuits Packet switching Delay Control systems Downlink
Content Type	Text
Resource Type	Article

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