The method for the user's terminal which enters into the...

H - Electricity – 04 – W

Patent

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H04W 4/06 (2009.01)

Patent

CA 2559402

The present invention discloses a method of uplink preemption by UEs later entering a trunking group with an established group call. With different priorities assigned for the UEs in the trunking group, the method includes: after the uplink of the trunking group with an establish group call is occupied by a talker, the trunking group sends a message with the priority information of the talker to the listeners; the later entry UE determines according to the received message with the priority information of the talker whether its own configured priority is higher than that of the talker, if it is higher than that of the talker, it determines that preemption for the uplink can be made; otherwise, it demodulates the group call channel downlink assigned for the trunking group when the group call was established, and listens to the voice. The method makes it possible for the later entry UE in a trunking group with an established group call to send an uplink access request and preempt the uplink when the UE has a higher priority.

La présente invention concerne un procédé permettant au terminal de l'utilisateur qui entre dans une communication de groupe préalablement établie d'occuper la liaison montante. Ce procédé comporte les étapes suivantes : a) quand la liaison montante de la communication de groupe qui a établi l'appel de groupe est occupée par un interlocuteur, la communication de groupe envoie le message de niveau de priorité de l'interlocuteur au terminal de l'utilisateur qui entre plus tard dans la communication de groupe ; b) le terminal de l'utilisateur qui entre plus tard dans la communication de groupe détermine si son niveau de priorité est supérieur à celui de l'interlocuteur, dans l'affirmative, il confirme qu'il peut occuper la liaison montante, autrement il démodule le canal de l'appel de groupe descendant qui est distribué au moment où l'appel de groupe est établi et peut alors parler. Ce procédé consiste à envoyer une requête d'accès à la liaison montante vers le réseau de communication de groupe qui occupe cette liaison, lorsque le niveau de priorité de l'utilisateur qui entre plus tard dans une communication de groupe est plus élevé.

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