Mobile communication method and mobile station

H - Electricity – 04 – W

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H04W 36/14 (2009.01) H04W 48/18 (2009.01) H04W 76/04 (2009.01)

Patent

CA 2733541

A mobile communication method according to the present invention includes the steps of: establishing a first radio link between the "LTE-AS" and the eNB in response to the "Service Request" received from the "EMM"; transmitting, from the "UMTS-AS" to the "MM/GMM", the "reconnect request", after the completion of the switching process from the mobile communication system of the LTE scheme to the mobile communication system of the UMTS scheme, when the "LTE-AS" detects RLF within a first predetermined period after receiving the switching command instructing performance of the switching process; and not transmitting, from the "MM/GMM" to the "UMTS-AS", the "Service Request" responding to the "reconnect request", when the mobile station UE has not performed a packet communication in the mobile communication system of the LTE scheme before a start of the switching process.

Le procédé de communication mobile de la présente invention comprend un premier processus dans lequel le système LTE-AS établit avec un eN B une première liaison radio en réponse à une première requête de service reçue du protocole de gestion de mobilité (EMM), un deuxième processus dans lequel, si, après que le système LTE-AS a reçu les instructions indiquant de commuter du système LTE au système UMTS, ledit système LTE-AS détecte un échec de liaison radio (RLF) dans l'intervalle de temps imparti, le système UMTS-AS envoie une requête de reconnexion avec MM/GMM lorsque la procédure de commutation est terminée; et un troisième processus dans lequel, si, avant le début de la procédure de commutation, l'équipement utilisateur (UE) de la station mobile n'a pas effectué la transmission de paquet par le système LTE, MM/GMM n'émet pas de deuxième requête de service en réponse à la requête de reconnexion vers le système UMTS-AS.

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