US 2011/0235580 A1Published application

Mobile communication method and mobile station

AssigneeNtt Docomo, Inc.

InventorsMasashi Kanauchi, Hiroaki Yamagishi, Mikio Iwamura

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Abstract

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.

Claims2

Dependent claims

A mobile communication method in which a mobile station location-registered on a mobile communication system of a first communication scheme starts a circuit-switched communication in a mobile communication system of a second communication scheme, comprising the steps of:

transmitting, from a second protocol function for the first communication scheme to a first protocol function for the first communication scheme, a first service request to request to start the circuit-switched communication in the mobile communication system of the second communication scheme, and starting a predetermined timer, at the mobile station;
transmitting, from the first protocol function for the first communication scheme to a radio access apparatus of the first communication scheme, the first service request, after establishing a first radio link between the first protocol function for the first communication scheme and the radio access apparatus of the first communication scheme, at the mobile station;
and
stopping, at the first protocol function for the first communication scheme, a predetermined timer, after detecting a radio link failure of the first radio link after receiving a switching command instructing performance of a switching process from the mobile communication system of the first communication scheme to the mobile communication system of the second communication scheme, at the mobile station.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 13/058,104Filed 7 Aug 2009
Priority: JP 2008-2059968 Aug 2008
Published: 29 Sep 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H04W 36/0066
Transmission or use of information for re-establishing the radio link: of control information between different types of networks in order to…
H04J 11/0069
Orthogonal multiplex systems, e.g. using WALSH codes: cell search, i.e. determining cell identity [cell-ID]
H04W 36/1443
Over a different radio air interface technology: between licensed networks
H04W 88/06
Terminal devices: adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals