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A Dynamic Timeslot Assignment Algorithm for Asymmetric Traffic in Multimedia TDMA/TDD Mobile Radio

Lan CHEN, Susumu YOSHIDA, Hidekazu MURATA, Shouichi HIROSE

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Summary :

Personal communication systems are increasingly required to accommodate not only voice traffic, but also various types of data traffic. Generally speaking, voice traffic is symmetric between uplink and downlink, while data traffic can be highly asymmetric. It is therefore inefficient to accommodate data in a conventional TDMA/TDD system with fixed TDD boundary. In this paper, focusing on the continuous data traffic which requires multi-slots in a circuit based TDMA/TDD system, an algorithm is proposed in which the TDD boundary are moved adaptively to accommodate data traffic efficiently. Comparing with the boundary-fixed conventional algorithm, computer simulations confirm that the proposed algorithm has superior performance in the excessive transmission delay of data while maintaining the performance of voice. The intercell interference between mobiles due to different TDD boundaries is also confirmed to be negligible. Moreover, almost the similar performance improvements of the proposed algorithm are confirmed for two different average message sizes of data calls.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E81-A No.7 pp.1358-1366
Publication Date
1998/07/25
Publicized
Online ISSN
DOI
Type of Manuscript
Special Section PAPER (Special Section on Fundamentals of Multi-dimensional Mobile Information Network)
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