Admission and flow control for multimedia CDMA

C. Comaniciu, N. Mandayam, D. Famolari, P. Agrawal

Research output: Contribution to conferencePaperpeer-review

14 Scopus citations

Abstract

QoS guarantees for an integrated CDMA system can be provided by a combination of admission and flow control. The admission control restricts the number of users in the system such that QoS requirements for all calls can be met. The flow control balances the system interference on a slot by slot basis such that Bit Error Rate requirements are met for all users and the real time users are given the highest priority. In this paper, we analyze the scenario of a single cell DS-CDMA system carrying both voice and www users. A new admission control is proposed and analyzed for web browsing sessions. The challenge in designing admission control for web users is due to the fact that the web traffic description is based on heavy tailed distributions. Thus, an accurate estimate for the average offered rate for a web session is hard to compute. Our proposed admission scheme, adaptively modifies the admission threshold at each time slot based on new average load measurements. The admission threshold is computed such that the probability of session dropping is maintained below a prescribed value. The flow control mechanism is an extension of the one proposed in [9], where the residual capacity from voice users is used to allocate resources for www users.

Original languageEnglish
Pages1265-1268
Number of pages4
StatePublished - 2000
Event2000 IEEE International Conference on Multimedia and Expo (ICME 2000) - New York, NY, United States
Duration: 30 Jul 20002 Aug 2000

Conference

Conference2000 IEEE International Conference on Multimedia and Expo (ICME 2000)
Country/TerritoryUnited States
CityNew York, NY
Period30/07/002/08/00

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