Target channel verification in a radiotelephone system
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United States of America Patent
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-
Feb 8, 1994
Issued Date -
N/A
app pub date -
Apr 23, 1993
filing date -
Apr 1, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A radiotelephone system verifies the carrier/interference (C/I) of a selected target channel before handoff. The subscriber (125), communicating to a source base-station (130) on a source channel, measures the received signal strength indication (RSSI) of a target channel at a target base-station (135) when the channel is keyed (transmitting) and dekeyed (not transmitting). The subscriber (125) transfers the measurements to a source base-station (130) which determines the ratio of the RSSI with the keyed channel (C) to the RSSI with the dekeyed channel (I). If the ratio is greater than a predetermined threshold, the source base-station (130) transfers the subscriber (125) from the source channel to the target channel at the target base-station (135).
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