Method and apparatus for performing handoff in a...

H - Electricity – 04 – Q

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Details

H04Q 7/38 (2006.01) H04J 13/02 (2006.01) H04Q 11/00 (2006.01) H04Q 7/30 (2006.01)

Patent

CA 2225347

Handoff from a Code-Division, Multiple Access (CDMA) protocol to an Advanced Mobile Phone Service (AMPS) protocol occurs by comparing a remote unit's (405) phase shift measurement to a threshold (503) and determining a reference CDMA base station (401) from an active set of CDMA base stations (515). Next, corrected phase shifts are calculated for each CDMA base station in the active set (521) and the remote unit (405) is handed off to an AMPS base station (109) underlying the CDMA coverage area (126) having the smallest corrected phase shift (525).

L'invention concerne la réalisation d'un transfert d'un protocole à accès multiple par différence de code (CDMA) à un protocole de service téléphonique mobile évolué (AMPS), ce procédé consistant à comparer une mesure de déphasage d'une unité à distance (405) à un seuil (503), et déterminer une station de base de référence CDMA (401) à partir d'un ensemble actif de stations de base CDMA (515); puis à calculer les déphasages corrigés pour chaque station de base CDMA de l'ensemble actif (521) et transférer l'unité à distance (405) vers une station de base AMPS (109) sous-jacente à la zone de diffusion (126) présentant le plus petit déphasage corrigé.

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