Efficient integration of multi-rate traffic for 3rd generation DS-CDMA systems

TitleEfficient integration of multi-rate traffic for 3rd generation DS-CDMA systems
Publication TypeConference Paper
Year of Publication1999
AuthorsFong, M. - H., and V. K. Bhargava
Conference NameCommunications, 1999. ICC '99. 1999 IEEE International Conference on
Pagination1426 -1430 vol.3
Keywords3rd generation DS-CDMA systems, activity factor, cellular radio, cellular system, channel capacity, code division multiple access, code length, concatenated codes, concatenated orthogonal/PN spreading sequences, data rate, forward link capacity, Hadamard codes, integrated wireless access network, integrated/mixed-rate traffic, inter-cell interference minimization, line rate selection, multi-rate traffic, multi-rate traffic integration, multiuser channels, PCS, personal communication networks, personal communications systems, processing gain, pseudonoise codes, radio access networks, radio links, Rayleigh channel, Rayleigh channels, source rates, spread spectrum communication, telecommunication traffic, traffic integration, Walsh-Hadamard codes

We address the issue of efficient integration of multi-rate traffic supported by third generation DS-CDMA systems. We have previously proposed the notion of line rate (adjusted data rate before spreading) to incorporate traffic with a wide range of source rates. Each selected line rate will support a group of multi-rate traffic. We evaluate the impact of line rate(s) selection on the forward link capacity of a system with integrated/mixed-rate traffic. We first derive the methodology of evaluating the capacity of mixed-rate traffic in the forward link. Our focus is to investigate the effect of processing gain and activity factor (resulting from a selected line rate) on the capacity of different traffic types. We also address the issue of Walsh-Hadamard codes usage of different length (at each selected line rate) and its impact on line rate selection. Our analysis provides insight into the use of line rate(s) for traffic integration and optimal selection of line rate(s)


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