Ntt Docomo, Inc.

Nec Corporation

Panasonic Mobile Communications Co., Ltd.

Masashi Kanauchi

Itsuma Tanaka

Mikio Iwamura

Kouhei Gotou

Keisuke Suzuki

Hiroaki Yamagishi

Akimichi Tanabe

Yasuhiro Kato

Wuri Andarmawanti Hapsari

Minami Ishii

Katsuhiro Noguchi

Kota Fujimura

Norihito Tokuhiro

Kazuyuki Kozu

Takehiro Ida

Hiromi Himeno

Hideyuki Sakuramoto

Taketoshi Nakajima

Shinpei Kawakatsu

Aki Ohashi

Nobukazu Uno

Takuya Takimoto

Hideo Mochida

Kenji Tsuruta

Kei Akiyama

Gou Okuizumi

Iwamura Mikio

As a result of ISR being enabled between a portable terminal device and a network which are capable of communicating by using the communication protocols of a plurality of wireless access technologies, the portable terminal device performs position registration processing between the plurality of wireless access technologies and the portable terminal device each time a fixed period of time elapses, and the portable terminal device is able to move between the plurality of wireless access technologies that have already been registered, without conducting new position registration processing. At this time, if there is a possibility of there being a difference in ISR states (activated or not activated) between the portable terminal device and the network, the portable terminal device ignores any instructions issued by the network for ISR to be enabled in the portable terminal device.

Radio access system and portable terminal device

As a result of ISR being enabled between a portable terminal device and a network which are capable of communicating by using the communication protocols of a plurality of wireless access technologies, the portable terminal device-performs position registration processing between the plurality of wireless access technologies and the portable terminal device each time a fixed period of time elapses, and the portable terminal device is able to move between the plurality of wireless access technologies that have already been registered, without conducting new position registration processing. At this time, if there is a possibility of there being a difference in ISR states (activated or not activated) between the portable terminal device and the network, the portable terminal device ignores any instructions issued by the network for ISR to be enabled in the portable terminal device.

A mobile station UE according to the present invention includes a control unitthat is configured not to transmit 'RRC Connection Request' to a predetermined network when recognizing that the predetermined network is incompatible with an MTC function based on signaling from the predetermined network.

Mobile station

As a result of ISR being enabled between a portable terminal device and a network which are capable of communicating by using the communication protocols of a plurality of wireless access technologies, the portable terminal device&#x2014;performs position registration processing between the plurality of wireless access technologies and the portable terminal device each time a fixed period of time elapses, and the portable terminal device is able to move between the plurality of wireless access technologies that have already been registered, without conducting new position registration processing. At this time, if there is a possibility of there being a difference in ISR states (activated or not activated) between the portable terminal device and the network, the portable terminal device ignores any instructions issued by the network for ISR to be enabled in the portable terminal device.

User equipment with timer controller

A mobile communication method according to the present invention includes the steps of: causing an switch MME to perform CSFB-related processing for a mobile station UE when receiving 'Extended Service Request' during call restriction and judging that the mobile station UE supports the barring scheme for CSFB on the basis of CSFB restriction capability information; and causing the switch MME to send the mobile station UE 'Service Reject' when receiving &#x201c;Extended Service Request&#x201d; during the call restriction and judging that the mobile station UE does not support the barring scheme for CSFB on the basis of the CSFB restriction capability information.

Mobile communication method, switch, and mobile station

Even when the mobile terminal (UE) redirected from the UMTS cell to the LTE cell by the redirecting technology cannot start the communication with the LTE system, the communication with the UMTS system can be started. A mobile terminal (UE) according to the present invention is instructed to be redirected from a UMTS cell to an LTE cell by a radio control apparatus (RNC), in an overlapped area between the UMTS cell in which communication with a UMTS system is available and the LTE cell in which communication with an LTE system is available, by transmitting a connection request signal including an LTE supported identifier for indicating that the LTE system is supported to the radio control apparatus (RNC) of the UMTS system. Moreover, the mobile terminal (UE) includes a connection setting process unit which executes a connection setting process with the radio control apparatus (RNC) while being turned into a state of not supporting the LTE system, when receiving a location registration failure signal for indicating that location registration to the tracking area of the LTE system is ended in failure.

Mobile device redirecting technology

In a mobile station (UE) according to the present invention, an AS function is configured to notify, when detecting a failure in a radio link established with the radio base station is detected or when discovering a cell subject to a location registration by a cell selection process, a NAS function of the detection or the discovery; and the NAS function is configured to transmit, in response to the notification, a location registration request signal to a mobile switching center (MME).

A mobile communication method according to the present invention comprising the subscriber management server device HSS determines either the radio access network of the WCDMA scheme or the radio access network of the LTE scheme as the standby radio access network of the mobile station UE based on the CSFB capability presence/absence information included in the received 'Update GPRS Location/Update Location Request' of received the mobile station UE, and a step in which the mobile station UE performs the standby operation in the standby radio access network of the mobile station UE determined by the subscriber management server device HSS.

Mobile communication method, mobile communication system, subscriber management server device, and mobile switching center

Provided are a mobile device and location registration method that, even when packet communications are being restricted and the location cannot be registered, the location can be registered rapidly when the access restriction is released. The mobile device comprises a packet timing unit that times a predetermined time; a location registration unit that registers the location to the control server for packet communications; a timing control unit that, if control server for packet communications is under access restriction, controls the timing operations to be temporarily stopped; and a location registration control unit that controls the location registration unit to register the location to the control server for packet communications, and also controls the location registration unit to register the location to the control server for packet communications if the control server for packet communications has released the access restriction and if the timing control unit has stopped the timing operations of the packet timing unit.

Mobile device and location registration method

A mobile communication method according to the present invention includes the steps of: transmitting, from an LTE-AS function to an EMM function, a reconnection request, when the LTE-AS function detects that an RRC connection is chanted to an idle state; and transmitting, at the EMM function, a service request, when the EMM function receives the reconnection request and detects that the LTE-AS function is in a coverage area.

Growing community of inventors

Yokosuka, Japan

Masashi Kanauchi