NDLI: Analysis of soft handoff algorithms with dynamic spreading WCDMA system

Content Provider	IEEE Xplore Digital Library
Author	Ju Wang Liu, J.C. Yuehao Cen
Copyright Year	2003
Description	Author affiliation: Dept. of Comput. & Inf. Sci., Florida Univ., Gainesville, FL, USA (Ju Wang; Liu, J.C.; Yuehao Cen)
Abstract	The undergoing 3G wireless network needs to support integration of voice and multimedia data services with varying QoS requirements. It is critical that the least BER for voice traffic, WWW traffic, and streaming video traffic be guaranteed at all time. With the capability of dynamically changing spreading factor, CDMA system could provide a range of QoS fitting the needs for different traffic type. In this paper, we extend our dynamic spreading admission control scheme to a multi-cell situation, by proposing a dynamic spreading enable soft handoff framework. The static system behavior is analyzed through the studying of the updating probability for both handoff mobile and target cell. Our analysis shows that the updating probability varies according the traffic of interest. A general expression of the joint updating probability is given assuming an equal distribution of traffic type. The processing time of the handoff request is analyzed. We found that the update process caused by handoff is the major component of delay. Further investigation shows that the update associated with handoff might consume too much access channel time, and increase the delay of handoff, especially when handoff traffic is heavy. We therefore adopt a batch mechanism such that multiple handoff requests could be processed simultaneously. The average delay is reduced from 1.12 seconds to 800 ms in heavy handoff rate.
Sponsorship	IEEE Comput. Soc. Nat. Natural Sci. China State Key Lab. on Integrated Service Network, China Commun. Res. Lab., Japan IEEE Xi'an Sub-section IEEE Taipei Sect. Chinese Inst. Commun. SIGDPS of IPSJ Japan
Starting Page	737
Ending Page	742
File Size	393844
Page Count	6
File Format	PDF
ISBN	0769519067
DOI	10.1109/AINA.2003.1192993
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-03-29
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Algorithm design and analysis Heuristic algorithms Multiaccess communication Communication system traffic control Delay Streaming media Wireless networks Bit error rate World Wide Web Admission control
Content Type	Text
Resource Type	Article

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