Radio access network (ran) level keep alive signaling

H - Electricity – 04 – W

Patent

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H04W 76/04 (2009.01)

Patent

CA 2710884

In a wireless communication system, a mobile station performs 'keep-alive' signaling with a serving radio access network (RAN), transmitting its identity without necessarily an accompanying data portion. The serving RAN does not necessarily acknowledge. Thereby, the mobile station maintains state synchronization with the serving RAN, which also benefits in being able to timely release a context when the 'keep-alive' transmission is not continued. In one aspect, the mobile station utilizes random access procedures (RACH) for uplink data arrival with a 0-byte MAC buffer status report whose identifying Cell Radio Network Temporary Identity (C-RNTI) can be used by the serving RAN for keep alive purposes. In another aspect, the mobile station can perform non-access stratum (NAS) signaling containing identification for the mobile station that is supported by underlying access stratum (AS) signaling via the serving RAN. This identifying NAS signaling is detected or a downstream recipient alerts the serving RAN.

Dans un système de communication sans fil, une station mobile effectue une signalisation de = rémanence = avec un réseau d'accès sans fil de desserte (RAN), en transmettant son identité sans nécessairement avoir besoin d'une partie de données d'accompagnement. Le RAN de desserte n'en accuse pas nécessairement réception. Ainsi, la station mobile maintient une synchronisation d'état avec le RAN de desserte, qui est également capable de transmettre opportunément un contexte lorsque la transmission de = rémanence = est interrompue. Selon un aspect, la station mobile utilise des procédures d'accès aléatoire (RACH) pour l'arrivée des données en liaison montante avec un rapport de statut de mémoire tampon de 0 octet dont l'identité temporaire d'identification de réseau radio cellulaire (C-RNTI) peut être utilisée par le RAN de desserte pour la rémanence. Selon un autre aspect, la station mobile peut effectuer une signalisation NAS (non-access stratum) qui contient l'identification de la station mobile qui est supportée par la signalisation AS (access stratum) sous-jacente par l'intermédiaire du RAN de desserte. Cette signalisation NAS d'identification est détectée ou un destinataire en aval alerte le RAN de desserte.

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