Title :
Performance of multi-rate data traffic using variable spreading gain in the reverse link under wideband CDMA
Author :
Vannithamby, Rath ; Sousa, Elvino S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
Abstract :
We analyze the capacity of a variable spreading gain code division multiple access (VSG-CDMA) system. Multi-rate data services will be supported in wideband CDMA systems. VSG-CDMA is one way of implementing multi-rate systems, the other being multi-code CDMA. The integration of voice, low speed data and high speed data is considered in the analysis. We also consider various data rates with different QoS requirements and activity levels. The capacity estimate of this integrated system is the maximum number of concurrent voice users, low speed data users and high speed data users that the system can support while the required QoS and outage probability measures are met. We analytically find the admissible region of multiple services with data rates ranging from 8 kbps to 256 kbps in a wideband CDMA system with 5 MHz bandwidth
Keywords :
broadband networks; cellular radio; channel capacity; code division multiple access; integrated voice/data communication; multiuser channels; quality of service; radio links; radio networks; radiofrequency interference; spread spectrum communication; telecommunication traffic; 5 MHz; 8 to 256 kbit/s; QoS requirements; activity levels; admissible region; bandwidth; capacity estimate; cellular radio; code division multiple access; data rates; high speed data; interference model; low speed data; multi-code CDMA; multi-rate data services; multi-rate data traffic performance; outage probability measures; reverse link; variable spreading gain; voice-data integration; wideband CDMA systems; Bandwidth; Capacity planning; Multiaccess communication; Multicarrier code division multiple access; Performance gain; Power generation; Power system modeling; Speech analysis; Velocity measurement; Wideband;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851306
