Mobility

Soft Handoff in Mobile Networks

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Executive Summary

In power controlled CDMA systems soft handoff is preferred over hard handoff strategies. This is more pronounced when the IS-95 standard is considered wherein the transmitter power is adjusted dynamically during the operation. The previous and the new wide band channels occupy the same frequency band in order to make an efficient use of bandwidth, which makes the use of soft handoff very important. The authors' main aim is to maintain a continuous link with the strongest signal base station otherwise a positive power control feedback would result in system problems. Soft handoff ensures a continuous link to the base station from which the strongest signal is issued.

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