Asymmetric Radio Resource Assignment Scheme for Connection-less Services in CDMA/Shared-TDD Cellular Packet Communications

Authors:
Yukinari Kobayashi;Kazuo Mori;Hideo Kobayashi
Affiliations:
The authors are with the Department of Electrical and Electronic Engineering, Faculty of Engineering, Mie University, Tsu-shi, 514--8507 Japan. E-mail: kmori@elec.mie-u.ac.jp;The authors are with the Department of Electrical and Electronic Engineering, Faculty of Engineering, Mie University, Tsu-shi, 514--8507 Japan. E-mail: kmori@elec.mie-u.ac.jp;The authors are with the Department of Electrical and Electronic Engineering, Faculty of Engineering, Mie University, Tsu-shi, 514--8507 Japan. E-mail: kmori@elec.mie-u.ac.jp
Venue:
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Year:
2005

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Asymmetric Traffic Accommodation Using Adaptive Cell Sizing Technique for CDMA/FDD Cellular Packet Communications

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences

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Abstract

The shared time division multiplexing (shared-TDD) scheme has been proposed to accommodate asymmetric communications between uplink and downlink. The accommodation of connection-less services in Shared-TDD systems causes a difficulty of TDD boundary control. This paper proposes a TDD boundary control (resource assignment) scheme, which can optimize a position of the TDD boundary based on the ratio of uplink to downlink traffic in code division multiple access (CDMA)/shared-TDD systems with connection-less services. The proposed scheme controls the TDD boundary based on the estimated uplink and downlink traffic. Computer simulations show that the proposed scheme effectively controls the radio resource, and thus improves total system throughput performance.