Wireless packet transmission with variable processing gain control in packet-switched and circuit-switched mode integrated DS-CDMA systems

Ryoko Matsuo, Michihito Matsuo, Tomoaki Ohtsuki, Iwao Sasase, Tomoyuki Udagawa

Research output: Contribution to journalArticle

Abstract

A DS-CDMA system with both a circuit-switching scheme for voice transmission and a packet-switching scheme for data transmission is effective in multimedia communication required to transmit a variety of media. Although the Slotted-ALOHA system is believed to be an effective packet-switched system from the perspectives of transmission efficiency and interference power, only open loop transmit power control is used because of the difficulty in using closed loop transmit power control in the ALOHA system. In this paper, we analyze the performance of open loop transmit power control that uses a power margin to obtain the quality required even in packet-switched terminals, and propose wireless packet transmission with variable processing gain control as the method to achieve high-speed transmission by more effectively using the free channels. The results of computer simulations showed that the system capacity of circuit-switched terminals is not damaged when an appropriate power margin is set, and the additional effect of the packet-switched terminals is increased. In addition, the proposed system can greatly shorten the average delay time of packet-switched terminals.

Original languageEnglish
Pages (from-to)16-26
Number of pages11
JournalElectronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi)
Volume84
Issue number10
DOIs
Publication statusPublished - 2001

Fingerprint

Gain control
Power control
Code division multiple access
Networks (circuits)
Processing
Speech transmission
Switching circuits
Packet switching
Data communication systems
Time delay
Communication
Computer simulation

Keywords

  • DS-CDMA
  • Multi-media communication
  • Open loop transmit power control
  • Packet switching
  • Power margin
  • Variable processing gain

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

Cite this

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title = "Wireless packet transmission with variable processing gain control in packet-switched and circuit-switched mode integrated DS-CDMA systems",
abstract = "A DS-CDMA system with both a circuit-switching scheme for voice transmission and a packet-switching scheme for data transmission is effective in multimedia communication required to transmit a variety of media. Although the Slotted-ALOHA system is believed to be an effective packet-switched system from the perspectives of transmission efficiency and interference power, only open loop transmit power control is used because of the difficulty in using closed loop transmit power control in the ALOHA system. In this paper, we analyze the performance of open loop transmit power control that uses a power margin to obtain the quality required even in packet-switched terminals, and propose wireless packet transmission with variable processing gain control as the method to achieve high-speed transmission by more effectively using the free channels. The results of computer simulations showed that the system capacity of circuit-switched terminals is not damaged when an appropriate power margin is set, and the additional effect of the packet-switched terminals is increased. In addition, the proposed system can greatly shorten the average delay time of packet-switched terminals.",
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author = "Ryoko Matsuo and Michihito Matsuo and Tomoaki Ohtsuki and Iwao Sasase and Tomoyuki Udagawa",
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AU - Matsuo, Michihito

AU - Ohtsuki, Tomoaki

AU - Sasase, Iwao

AU - Udagawa, Tomoyuki

PY - 2001

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N2 - A DS-CDMA system with both a circuit-switching scheme for voice transmission and a packet-switching scheme for data transmission is effective in multimedia communication required to transmit a variety of media. Although the Slotted-ALOHA system is believed to be an effective packet-switched system from the perspectives of transmission efficiency and interference power, only open loop transmit power control is used because of the difficulty in using closed loop transmit power control in the ALOHA system. In this paper, we analyze the performance of open loop transmit power control that uses a power margin to obtain the quality required even in packet-switched terminals, and propose wireless packet transmission with variable processing gain control as the method to achieve high-speed transmission by more effectively using the free channels. The results of computer simulations showed that the system capacity of circuit-switched terminals is not damaged when an appropriate power margin is set, and the additional effect of the packet-switched terminals is increased. In addition, the proposed system can greatly shorten the average delay time of packet-switched terminals.

AB - A DS-CDMA system with both a circuit-switching scheme for voice transmission and a packet-switching scheme for data transmission is effective in multimedia communication required to transmit a variety of media. Although the Slotted-ALOHA system is believed to be an effective packet-switched system from the perspectives of transmission efficiency and interference power, only open loop transmit power control is used because of the difficulty in using closed loop transmit power control in the ALOHA system. In this paper, we analyze the performance of open loop transmit power control that uses a power margin to obtain the quality required even in packet-switched terminals, and propose wireless packet transmission with variable processing gain control as the method to achieve high-speed transmission by more effectively using the free channels. The results of computer simulations showed that the system capacity of circuit-switched terminals is not damaged when an appropriate power margin is set, and the additional effect of the packet-switched terminals is increased. In addition, the proposed system can greatly shorten the average delay time of packet-switched terminals.

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