Jointly optimal power and admission control for delay sensitive traffic in CDMA networks with LMMSE receivers

Cristina Comaniciu, H. Vincent Poor

Research output: Contribution to journalArticle

56 Scopus citations

Abstract

In this paper, quality-of-service (QoS) guarantees for multiclass code division multiple access networks are provided by means of cross-layer optimization across the physical and network layers. At the physical layer, the QoS requirements are specified in terms of a target signal-to-interference ratio (SIR) requirement, and optimal target powers are dynamically adjusted according to the current number of users in the system. At the network layer, the QoS requirements are the blocking probabilities and the call connection delays. The network layer guarantees that both physical layer and network layer QoS are met by employing admission control. An optimal admission control policy is proposed based on a semi-Markov decision process formulation. The tradeoff between blocking and delay is discussed for various buffer configurations. The advantage of advanced signal processing receivers is established using a comparative capacity analysis and simulation with the classical scenario in which the system uses matched filter receivers.

Original languageEnglish (US)
Pages (from-to)2031-2042
Number of pages12
JournalIEEE Transactions on Signal Processing
Volume51
Issue number8
DOIs
StatePublished - Aug 1 2003

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Electrical and Electronic Engineering

Keywords

  • Admission control
  • CDMA
  • Capacity
  • Cross-layer
  • Multiuser detection
  • Power control
  • QoS

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