Uplink Packet Transmission Control for Asymmetric Traffic in CDMA/Shared-TDD Cellular Packet Communications

Kazuo MORI
Tomotaka NAGAOSA

IEICE TRANSACTIONS on Communications   Vol.E86-B    No.9    pp.2620-2627
Publication Date: 2003/09/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technology
asymmetric communication,  time division duplexing,  cellular system,  CDMA,  packet communication,  transmission control,  

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A shared-TDD scheme has been proposed for accommodation of asymmetric communications between uplink and downlink traffic. The application of shared-TDD scheme to CDMA cellular systems causes inter-link interference because CDMA cellular systems use the same frequency band for all cells. This paper proposes a transmission control scheme for uplink packets to relieve the effect of inter-link interference in CDMA/shared-TDD cellular packet systems. In the proposed scheme, mobile stations select transmission slots based on their location and the status of slot allocations in own and the adjacent cells. Computer simulations show that the proposed scheme relieves the effect of inter-link interference, and thus improves the downlink transmission efficiency.