DocumentCode :
2258068
Title :
Power control for variable QOS on a CDMA channel
Author :
Yun, Louis C. ; Messerschmitt, David G.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
fYear :
1994
fDate :
2-5 Oct 1994
Firstpage :
178
Abstract :
The scant bandwidth and high error rates of the wireless channel make joint source-channel coding desirable for optimizing resource usage. To this end, we propose a multiple substream abstraction for source traffic, with delay and loss characteristics negotiated between the application and network on a per-substream basis. This model affords flexibility while maintaining network efficiency by only appropriating more resources (e.g. Bandwidth and error protection) to more important user information. We describe an algorithm for supporting different quality of service (QOS) requirements for different traffic in an interference-limited cellular CDMA environment. The algorithm accepts QOS specifications for different substreams, accommodates them by assigning different power levels to each signal, and can be used to add or drop substream connections dynamically while ensuring that QOS specifications are not violated. Present-day power control schemes are used to combat the near-far effect; while the proposed algorithm also accomplishes this goal, it is in fact more general: via power modulation, it can provision different QOS levels for different substreams
Keywords :
cellular radio; channel coding; code division multiple access; delays; land mobile radio; modulation; power control; radiofrequency interference; source coding; telecommunication channels; telecommunication control; telecommunication services; CDMA channel; QOS specifications; algorithm; bandwidth; coding; delay characteristics; error protection; error rates; interference-limited cellular CDMA environment; loss characteristics; multiple substream abstraction; near-far effect; network efficiency; power control; power modulation; quality of service; source traffic; source-channel coding; substreams; variable QOS; wireless channel; Bandwidth; Error analysis; Modulation coding; Multiaccess communication; Power control; Protection; Quality of service; Signal resolution; Telecommunication traffic; Traffic control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Military Communications Conference, 1994. MILCOM '94. Conference Record, 1994 IEEE
Conference_Location :
Fort Monmouth, NJ
Print_ISBN :
0-7803-1828-5
Type :
conf
DOI :
10.1109/MILCOM.1994.473953
Filename :
473953
Link To Document :
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