Capacity model for the CDMA/HDR high-speed wireless data service

ABSTRACT

CDMA/HDR (High Data Rate) is a high-speed wireless data service that is optimized for best-effort data services (for a description of HDR see [1]). As with all best-effort services, as the number of users increases, the quality of service experienced by each user decreases. In order to provide an acceptable level of service to users, the system must be engineered for a limited number of connected users and ensure (by admission controls) that this number is rarely exceeded. In this paper we provide a capacity model that can be used to determine user perceived delays and throughput as a function of the total number of users. This can then be used to determine the maximum number of simultaneous users that the system can support for specified limits on user delay and throughput.

REFERENCES

• 1: P. Bender et al. CDMA/HDR: A bandwidth-efficient high-speed wireless data service for nomadic users. IEEE Communications Magazine, pages 70-77, July 2000.
• 2: A. Jalali et al. Data throughput of CDMA-HDR a high efficiency-high data rate personal communication wireless system. In Proceedings of the 2000 Vehicular Technology Conference, (Tokyo Japan), volume 3, pages 1854-1858, 2000.
• 3: F. Kelly. Charging and rate control for elastic traffic. European Transactions on Telecommunications, 8:33-37, 1997.
• 4: J. Padhye , V. Firoiu , D. Towsley , J. Kurose, Modeling TCP Throughpu: A simple model and its empirical validation, University of Massachusetts, Amherst, MA, 1998
• 5: WG5 Evaluation Ad Hoc. lxEV-DV evaluation methodology, May 2001.

INDEX TERMS

Primary Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.1 Network Architecture and Design
          Subjects: Wireless communication

Additional Classification:
  C. Computer Systems Organization

  I. Computing Methodologies
  I.6 SIMULATION AND MODELING

General Terms:
Design, Measurement, Performance, Standardization, Theory

Keywords:
CDMA, HDR, capacity model, performance analysis