Capacity Analysis for Connection Admission Control in IndoorMultimedia CDMA Wireless Communications

  • Authors:
  • Jean Q.-J. Chak;Weihua Zhuang

  • Affiliations:
  • Wireless Innovation Lab, Lucent Technologies Canada, 3650 Victoria Park;Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1 E-mail: wzhuang@bbcr.uwaterloo.ca

  • Venue:
  • Wireless Personal Communications: An International Journal
  • Year:
  • 2000

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Abstract

In this paper, the capacity analysis for connection admission control is presented for the reverse-link transmission of a packetized indoor multimedia wireless communication system using direct sequence code division multiple access (DS/CDMA). Since CDMA is interference limited, the signal-to-interference-plus-noise ratio criterion isused to check if there is enough system resources (i.e., theCDMA channels and received signal power) for each new connection request.Taking into account the stochastical nature of multimedia traffic, the effective bit rate is used to characterize the resources required by each mobile user and a linear approximation is then used to find the total resources required by all the mobile users already admitted to the system and the new connectionrequest. Transmission errors due to both basestation buffer overflow and wireless channel impairments are considered.The capacity of multimedia traffic is determined in such a way that the utilization of the system resources is maximized and, at the same time, the required transmission bit error rate and transmission delay of all users admitted to the system are guaranteed. Computer simulation results are given todemonstrate the performance of the proposed method for capacity analysis.