Carrier switching in a multi-carrier wireless communication...

H - Electricity – 04 – W

Patent

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H04W 36/30 (2009.01)

Patent

CA 2685079

Techniques for performing carrier switching in a multi-carrier access network are described. A terminal may be assigned to a carrier among multiple carriers having different transmit power levels, e.g., by the access network during system access or handoff. The terminal may receive a switch threshold from the access network. The terminal may periodically measure the received signal strength of the assigned carrier and may compare the received signal strength against the switch threshold. The terminal may refrain from switching to a stronger carrier if the received signal strength exceeds the switch threshold and may switch to the stronger carrier if the received signal strength is below the switch threshold. This carrier switching scheme may prevent the terminal from switching to the strongest carrier when the assigned carrier can provide satisfactory performance. The access network may also switch the terminal to another carrier by sending a carrier switch message.

L'invention concerne des techniques pour effectuer une commutation de porteuse dans un réseau d'accès multiporteuse. Un terminal peut être attribué à une porteuse parmi de multiples porteuses ayant des niveaux de puissance de transmission différents, par exemple par le réseau d'accès pendant un accès ou un transfert de système. Le terminal peut recevoir un seuil de commutation provenant du réseau d'accès. Le terminal peut mesurer périodiquement la force du signal reçu de la porteuse attribuée et comparer la force du signal reçu au seuil de commutation. Le terminal peut s'abstenir de commuter vers une porteuse plus forte si la force du signal reçu dépasse le seuil de commutation, et peut commuter vers la porteuse plus forte si la force du signal reçu est inférieure au seuil de commutation. Ce schéma de commutation de porteuse peut empêcher le terminal de commuter vers la porteuse plus forte lorsque la porteuse attribuée peut fournir un rendement satisfaisant. Le réseau d'accès peut également commuter le terminal vers une autre porteuse en envoyant un message de commutation de porteuse.

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