System and method of delivering collect calls in a radio...

H - Electricity – 04 – Q

Patent

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Details

H04Q 7/22 (2006.01) H04M 15/08 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2301505

In a radio telecommunications network, a system and method of informing a called mobile station (14) operating in a visited mobile switching center (V- MSC)(13) that an incoming call is a collect call prior to delivering the incoming call to the mobile station. The system obtains in an originating mobile switching center (O-MSC)(11), a collect call prefix (16) from a calling party and determines from the collect call prefix that the incoming call is a collect call. A collect call indication (CCI)(17) is generated and sent along with the calling number to the V-MSC in a Location Request (LocReq) Invoke message (19) and a Routing Request (RoutReq) Invoke message (21), thereby notifying the V-MSC that there is an incoming call for the mobile station and the incoming call is a collect call. The V-MSC (13) sets a collect call flag (23) to ON, stores the calling number in a subscriber record (22) in the V- MSC, and determines whether the mobile station is a digital mobile station. If so, a Short Message Service (SMS) message (34) including the calling number is sent to the mobile station informing the subscriber that the incoming call is about to be delivered and the incoming call is a collect call. If the mobile station is a dual-capable mobile station, a distinctive ringing signal (38) is sent to the mobile station. The incoming call is then delivered to the mobile station, and the subscriber may choose to answer or not. The collect call flag (23) is then reset to OFF in the subscriber record in the V-MSC.

L'invention porte sur un système et un procédé relatifs à un réseau de radiotélécommunications servant à informer une station mobile appelée (14) fonctionnant dans un centre mobile de commutation (V-MSC) (13) qu'une communication entrante est une communication en PCV avant de transmettre ladite communication à la station mobile. Le système reçoit dans le centre mobile de communications d'origine (11) un préfixe d'appel en PCV (16) de la partie appelante et détermine à partir dudit préfixe si la communication entrante est en PCV. Un indicateur de PCV (CCI) (17) ayant été produit est transmis avec le N· d'appel au V-MSC dans un message de demande de position (19), et dans un message de demande d'acheminement (21), notifiant par là au V-MSC la présence d'une communication entrante et sa nature de PCV. Le V-MSC (13) met le drapeau de message PCV sur ON, enregistre le N· d'appel dans un registre d'abonné (22) et détermine si la station mobile est du type numérique. Si oui, un message (34) SMS comportant le N· d'appel est transmis à la station mobile, informant l'abonné que la communication est sur le point d'aboutir et qu'il s'agit d'un PCV. Si la station mobile est du type double, une sonnerie particulière (38) lui est envoyée. La communication entrante est alors transmise à la station mobile et l'abonné peut choisir de répondre ou non. Le drapeau de message de PCV est ensuite remis sur OFF dans le registre d'abonnés du V-MSC.

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