NDLI: Scheduling Performance of Real Time Service in Multiuser OFDM System

Content Provider	IEEE Xplore Digital Library
Author	Guangyi Liu Jianhua Zhang Bei Zhou Weidong Wang
Copyright Year	2007
Description	Author affiliation: Res. Inst. of China Mobile, beijing (Guangyi Liu)
Abstract	In multiuser OFDMA system, multiuser diversity gain can be achieved by channel aware subcarrier and power allocation, and most work in this field is focused on the none-real time service. For real time (RT) service, not only the data rate, but also the packet delay should be guaranteed. In this paper, the multiuser subcarrier allocation is investigated for real time service. By exploiting the queue status information and channel state information (CSI), the delay sensitive service is expected to be served well. In this paper, modified largest weighted delay first (M-LWDF), quality guaranteed (QG) scheduling algorithms based on channel and queue aware are proposed for real time service in multiuser OFDMA system, and compared with packet loss ratio (PLR) algorithm. From the simulation results, these algorithms almost have the same performance when system load is low, when the radio resource is enough to offer service for video users; when the system load increases, the performance difference becomes larger. The modified M-LWDF has the best performance, while QG has a better system throughput than PLR, but a worse user drop ratio.
Starting Page	504
Ending Page	507
File Size	252299
Page Count	4
File Format	PDF
ISBN	9781424413119
DOI	10.1109/WICOM.2007.132
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-09-21
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Real time systems OFDM Delay effects Diversity methods Throughput Power system modeling Interference constraints Scheduling algorithm Channel state information Wideband
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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