Handover between wireless telecommunication networks/systems

Details Handover between wireless telecommunication networks/systems Handover between wireless telecommunication networks/systems

H - Electricity

04

Q

H04Q 7/38 (2006.01)

Patent

CA 2385656

A method and a wireless telecommunication system of performing network- assisted handover of calls between a serving network and another wireless network that employs communication protocols different from those of the serving network. A message is sent from a mobile station of a user to the serving wireless network, which includes an indication that the mobile station is capable of communicating with the neighboring wireless network. Information relating to the communication characteristics of the neighboring wireless network is also sent from the serving wireless network to the mobile station. Using the information relating to the communication characteristics of the neighboring wireless network, the mobile station receives radio signals from the neighboring wireless network. The quality of the radio signals between the mobile station and the neighboring wireless network is measured. The serving wireless network sends a message to the neighboring wireless network to request a handover of the communication transaction when the quality of the radio signals between the neighboring wireless network and the mobile station meets a predetermined minimum threshold. Then a handover of the communication transaction from the serving wireless network to the neighboring wireless network is executed after the neighboring wireless network has established a communication channel for the mobile station pursuant to the handover request.

Cette invention concerne une technique et un système de télécommunications sans fil permettant de transférer des appels entre un réseau serveur et un autre réseau sans fil dont les protocoles de communication diffèrent de ceux du réseau serveur. Un message transmis d'un poste mobile d'utilisateur au réseau serveur sans fil comporte un signe indiquant que le poste mobile est en mesure de communiquer avec le réseau sans fil voisin. Des informations relatives au caractéristiques de communication du réseau sans fil voisin sont également transmises du réseau serveur au poste mobile. A l'aide de ces informations, le poste mobile reçoit des signaux du réseau voisin. On mesure la qualité des signaux radio entre le poste mobile et le réseau sans fil voisin. Le réseau serveur envoie au réseau voisin un message demandant de transférer la transaction de communication lorsque la qualité du signal radio entre le réseau voisin et le poste mobile satisfait à un seuil minimum prédéfini. Un transfert de communication entre le réseau serveur et le réseau voisin a lieu une fois que ce dernier réseau a établi un canal de communication pour le poste mobile conformément à la demande de transfert.

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