Facilitating handover between a source and a target base...

H - Electricity – 04 – W

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H04W 36/08 (2009.01) H04W 24/00 (2009.01) H04W 36/30 (2009.01)

Patent

CA 2678456

Systems and methodologies are described that facilitate handing over mobile device communications in a wireless network from a source base station to a target base station without using a random access channel (RACH). In this regard, the source base station can request shared data bandwidth resources from the target base station on behalf of the mobile device and assign the resources to the mobile device. The mobile device can calculate a timing difference between the source and target base stations and can handover communications by transmitting over the shared data bandwidth using the timing difference to generally provide correct timing for the transmission. To this end, the target base station can have transmission time intervals where it allows transmitting with an extended cyclic prefix to ensure more reliable handover for the mobile device.

La présente invention concerne des systèmes et des méthodologies qui facilitent le transfert de communications de dispositif mobile dans un réseau sans fil d'un poste de base source à un poste de base cible sans utiliser un canal d'accès aléatoire (RACH). A cet égard, le poste de base source peut demander des ressources de bande passante de données partagées du poste de base cible pour le compte du dispositif mobile et attribuer les ressources au dispositif mobile. Le dispositif mobile peut calculer une différence temporelle entre les postes de base source et cible et peut transférer des communications en effectuant une transmission sur la bande passante de données partagée en utilisant la différence temporelle pour fournir de manière générale une synchronisation correcte pour la transmission. A cette fin, le poste de base cible peut présenter des intervalles de temps de transmission quand il permet une transmission avec un préfixe cyclique étendu afin d'assurer un transfert plus fiable pour le dispositif mobile.

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