Improving the performance in a multimedia CDMA cellular system with resource reservation

Bor Jiunn Hwang, Jung Shyr Wu, Yu Chan Nieh

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The Direct-Sequence Code Division Multiple Access (DS-CDMA) is one of the most likely candidates for the 3rd generation mobile communication systems. On the other hand, a network supporting integrated data transfer and providing predictable qualities of service (QoS) to such application is an attractive issue. This paper proposes several schemes based on the majority rule concerned with resource reservation to investigate the performance of a CDMA cellular system. The admission control is based on the residue capacity and required signal-to-noise ratio (SNR) for multimedia traffic including voice, data and video. The system performance is explored with variable spreading gain and multi-code CDMA systems under the proposed schemes. Moreover, several system parameters including the handoff probability (lifetime in a cell) and the traffic load are investigated to study the impact to system performance. The results show the trade-off between the blocking probability of new calls and dropping probability of handoff calls under diversified situations. However, it is inefficient under resource reservation due to unused capacity. In this paper, we also propose a resource-borrowing scheme to improve system performance. Simulation results show that our proposed algorithm really improves the system performance in a multimedia CDMA cellular system with resource reservation.

Original languageEnglish
Pages (from-to)727-738
Number of pages12
JournalIEICE Transactions on Communications
VolumeE84-B
Issue number4
StatePublished - Apr 2001

Keywords

  • CDMA
  • Multicode
  • Resource reservation

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