Methods and apparatus for re-establishing communication for...

H - Electricity – 04 – L

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H04L 12/56 (2006.01) H04Q 7/36 (2006.01) H04Q 7/38 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2514012

Several related methods and apparatus for re-establishing communication for a wireless communication device after a communication loss between the wireless device and a wireless communication network are disclosed. In one illustrative example, the wireless network broadcasts identifiers of wireless devices associated with communication losses in the wireless network over a control channel. After regaining signal coverage, a wireless device monitors the control channel to decode and compare each broadcasted identifier with an identifier of the wireless device. Based on a match between a broadcasted identifier and the identifier of the wireless device, the wireless device transmits a control message which informs the wireless network of the presence of the wireless device. Otherwise, the wireless device normally refrains from transmitting the control message to the wireless network. Advantageously, communication with the wireless network is re-established without overburdening the wireless link with unnecessary traffic.

La présente invention a trait à plusieurs procédés associés et un appareil pour le rétablissement de communication pour un dispositif de communication sans fil après perte de communication entre le dispositif sans fil et un réseau de communication sans fil. Dans un exemple représentatif, le réseau sans fil diffuse des identifiants de dispositifs sans fil associés aux pertes de communication dans le réseau sans fil sur une voie de commande. Lors de la reprise du signal de couverture, un dispositif sans fil contrôle la voie de commande pour le décodage et la comparaison de chaque identifiant diffusé avec un identifiant du dispositif sans fil. Sur la base d'une correspondance entre l'identifiant diffusé et l'identifiant du dispositif sans fil, le dispositif sans fil transmet un message de contrôle qui informe le réseau sans fil de la présence d'un dispositif sans fil. Dans le cas contraire, le dispositif sans fil évite normalement de transmettre le message de contrôle au réseau sans fil. De manière avantageuse, la communication avec le réseau sans fil est rétablie sans surcharger la liaison sans fil de trafic inutile.

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