Target channel verification in a radiotelephone system

Details Target channel verification in a radiotelephone system Target channel verification in a radiotelephone system

H - Electricity

04

B

H04B 7/26 (2006.01) H04J 3/02 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2105381

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 (1). 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).

Un système radiotéléphonique vérifie le rapport porteuse/brouillage d'un canal cible avant le transfert de la communication. L'abonné (125), communiquant avec une station de base source (130) sur un canal source, mesure l'indication d'intensité de signal reçu (RSSI) d'un canal cible à une station de base cible (135) lorsque le canal est activé (émission) et lorsqu'il n'est pas activé (non-émission). L'abonné (125) transfère les mesures à une station de base source (130) qui met en rapport le RSSI pour le canal activé (C) et le RSSI pour le canal non activé (1). Si ce rapport est supérieur à un seuil prédéterminé, la station de base source (130) transfère l'abonné (125) du canal source au canal cible à la station de base cible (135).

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