Downlink performance improvement of TDD CDMA cellular networks with time slot and fixed hopping station allocations

Rui Zhou, Hoang Nam Nguyen, Iwao Sasase

Research output: Contribution to journalArticle


In this paper, downlink capacity of time duplex division (TDD) based cellular wireless networks utilizing fixed hopping stations is investigated. In the network, a number of fixed subscriber stations act as hopping transmission stations between base stations and far away subscribers, forming a cellular and ad hoc mobile network model. At the radio layer, TDD code division multiple access (CDMA) is selected as the radio interface due to high efficiency of frequency usage. In order to improve the system performance in terms of downlink capacity, we propose different time slot allocation schemes with the usage of fixed hopping stations, which can be selected by either random or distanced dependent schemes. Performance results obtained by computer simulation demonstrate the effectiveness of the proposed network to improve downlink system capacity.

Original languageEnglish
Pages (from-to)247-253
Number of pages7
JournalJournal of Communications and Networks
Issue number3
Publication statusPublished - 2007 Sep



  • Cellular network
  • Fixed hopping station
  • Time duplex division code division multiple access (TDD CDMA)
  • Time slot allocation

ASJC Scopus subject areas

  • Information Systems
  • Computer Networks and Communications

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