Selection of positioning handover candidates based on angle

Details Selection of positioning handover candidates based on angle Selection of positioning handover candidates based on angle

H - Electricity

04

Q

H04Q 7/38 (2006.01)

Patent

CA 2308171

A telecommunications system and method for determining optimal target Base Transceiver Stations (BTSs) to perform positioning handovers and obtain positioning data is disclosed. When a positioning request is received by a Base Station Controller (BSC) serving the Mobile Station (MS) to be positioned, the serving BSC accesses a database within the BSC, which contains a list of cells belonging to candidate target BTSs. Based on this information, and the main antenna direction of the serving BTS, two candidates for positioning handovers are selected from the list such that the angle between the main direction of two adjacent BTSs is nearly equivalent to the angle between the main direction of two additional adjacent BTSs. By selecting the target BTSs in this manner, it can be ensured that the target BTSs surround the MS, thus decreasing the error in the location calculations performed by a Positioning Center (PC).

L'invention concerne un système et un procédé de télécommunications, servant à déterminer des stations de base, émettrices/réceptrices (BTSs), cibles, optimales, afin d'exécuter des transferts de localisation et obtenir des données de localisation. Lorsqu'une demande de localisation est reçue par un module de commande de station de base (BSC) desservant la station mobile (MS) à localiser, le BSC de desserte accède à une base de données du BSC, laquelle contient une liste de cellules appartenant à des BTSs cibles candidates. D'après ces informations et la direction de l'antenne principale de la BTS de desserte, deux candidats de localisation de transferts sont choisis à partir d'une liste de façon que l'angle formé par la direction principale de deux BTSs adjacentes soit presque équivalent à l'angle formé par la direction principale de deux autres BTSs adjacentes. En choisissant les BTSs cibles de cette façon, on peut être certain que les BTSs cibles entourent la station mobile, diminuant ainsi l'erreur dans les calculs d'emplacement, exécutés par un centre de localisation (PC).

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