Traffic Performance of a Software-Based TDMA/CDMA System Accommodating Heterogeneous Multimedia Services(Special lssue on lnnovative Mobile Communication Technologies at the Dawn of the 21^<st> Century)
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概要
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In software-based wireless multimedia communications systems, each mobile terminal will be able to select its bets-suited transmission format according to its quality of service (QoS) and channel condition. In this paper, we focus attention on"access scheme selectability"in such a software-based system, and discuss the traffic performance improvement due to adaptive access scheme selection. Assuming a software-based TDMA/CDMA system where time division multiple access (TDMA) and direct sequence code division multiple access (DS-CDMA) schemes are flexibly selectable we evaluate the traffic performance in terms of average delay with a typical multimedia service model to be supported in future wireless communications systems. In the TDMA/CDMA system, how to determine an appropriate access scheme for a user is a key issue. Therefore, we discuss the selection algorithm for efficiently supporting heterogeneous multimedia services. Our computer simulation results show that the software-based system with a simple access scheme selection algorithm can significantly improve the traffic performance as compared with conventional hardware-based systems.
- 社団法人電子情報通信学会の論文
- 2001-03-01
著者
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Yomo Hiroyuki
The Department Of Electronic Information And Energy Engineering Graduate School Of Engineering Osaka
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HARA Shinsuke
the Department of Electronic, Information and Energy Engineering, Graduate School of Engineering, Os
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Hara Shinsuke
The Department Of Electronic Information And Energy Engineering Graduate School Of Engineering Osaka
関連論文
- Traffic Performance of a Software-Based TDMA/CDMA System Accommodating Heterogeneous Multimedia Services(Special lssue on lnnovative Mobile Communication Technologies at the Dawn of the 21^ Century)
- An Efficient Slot Allocation Algorithm to Accommodate Multimedia Traffic in CDMA/TDD-Based Wireless Communications Systems(Special Section on Spread Spectrum Techniques and Applications)