NDLI: Handoff schemes in CDMA cellular systems

Content Provider	IEEE Xplore Digital Library
Author	Worley, B. Takawira, F.
Copyright Year	1998
Description	Author affiliation: Dept. of Electron. Eng., Natal Univ., Durban, South Africa (Worley, B.)
Abstract	This paper presents a soft handoff technique, which is based upon previous handoff schemes on adaptive traffic load shedding and a scheme on channel assignment strategies using soft handoff area sizing. We refer to the algorithm as adaptive load shedding with soft handoff sizing (ALS-SHS). It takes advantage of the soft handoff and soft capacity features of CDMA to dynamically adjust the soft handoff area of the base station so as to maintain a specified signal-to-interference ratio in the cell. This scheme is particularly useful in cases where hot-spot cells develop: these are heavily loaded cells surrounded by lightly loaded cells. Hot-spot cells occur in situations such as traffic accidents on a highway. The active mobiles in the cell may outnumber the capacity and an excessive increase in CDMA noise may, in the worst case, block all calls in the cell. Dynamic adjustment of the soft handoff area allows the reduction of traffic in the cell by altering the cell's soft handoff area so that users are accommodated based upon the SIR value within the cell.
Starting Page	255
Ending Page	260
File Size	580430
Page Count	6
File Format	PDF
ISBN	0780350545
DOI	10.1109/COMSIG.1998.736959
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-09-08
Publisher Place	South Africa
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Base stations Telecommunication traffic Mobile communication Power system modeling Africa Road accidents Road transportation Active noise reduction Maintenance
Content Type	Text
Resource Type	Article

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