A Random Access Micro-Cellular System Based on CSMA and Power Control

• KUBOTA Satoru

  Faculty of Engineering, Shinshu University

• MUTSUURA Kouichi

  Faculty of Economics, Shinshu University

• AKIZUKI Osamu

  School of Project Design, Miyagi University

• OOSHITA Shinjirou

  Faculty of Engineering, Shinshu University

抄録

A random access micro-cellular system based on CSMA(RAMCS/CSMA)is proposed. On uplink in RAMCS/CSMA, packets are transmitted by means of CSMA at the same carrier frequency in any cell. On downlink, packets are broadcast conforming to TDMA, also at the same carrier frequency in any cell. In RAMCS/CSMA, deployed microcells produce higher system capacity. Nevertheless, "handoff on a terminal" isn't required. In this paper, overview of the system, fundamental uplink performance, and two kinds of power control methods are presented. As for the control methods, one is control according to packet priority. The other is a way according to location of a mobile terminal. By means of CSMA, throughput performance on uplink becomes great and is saturated at 0.39 per cell. And the performance strongly depends on the threshold level on carrier sense. Such a throughput performance is peculiar to RAMCS/CSMA and different from an ordinary CSMA system. The optimum threshold is also indicated here. Furthermore, it is clarified that both power control methods highly improve the throughput performance. As a result, it is found that RAMCS/CSMA is excellent for mobile communications.

収録刊行物

• IEICE transactions on fundamentals of electronics, communications and computer sciences

  IEICE transactions on fundamentals of electronics, communications and computer sciences 81 (7), 1349-1357, 1998-07-25

  一般社団法人電子情報通信学会

キーワード

• random access
• micro-cellular
• RAMCS
• CSMA
• throughput

詳細情報

• CRID: 1570572702403410944
• NII論文ID: 110003208015
• NII書誌ID: AA10826239
• ISSN: 09168508
• 本文言語コード: en
• データソース種別:
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