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Proceedings Paper

Framework for power and activity factor allocation in a multiclass CDMA system
Author(s): Xinzhou Wu; Rayadurgam Srikant
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Paper Abstract

We consider a multimedia CDMA uplink where there are multiple classes of users with different Quality-of-Service (QoS) requirements. Each user is modeled as an ON-OFF source, where in the ON state, the user transmits a fixed number of bits in each time slot and in the OFF state, the user is silent. The probability of being in the ON state, known as the activity factor, could be different for different users. Assuming a constant channel gain, we first characterize the set of transmit power levels, activity factors and number of users in each class that can be supported by a system with a given spreading gain under the constraint that each user's QoS requirement must be met. Using this characterization, we then present a utility function-based algorithm for choosing the activity factors of elastic users in the network.

Paper Details

Date Published: 25 July 2001
PDF: 12 pages
Proc. SPIE 4526, Scalability and Traffic Control in IP Networks, (25 July 2001); doi: 10.1117/12.434390
Show Author Affiliations
Xinzhou Wu, Univ. of Illinois/Urbana-Champaign (United States)
Rayadurgam Srikant, Univ. of Illinois/Urbana-Champaign (United States)

Published in SPIE Proceedings Vol. 4526:
Scalability and Traffic Control in IP Networks
Sonia Fahmy; Kihong Park, Editor(s)

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