Ntt Docomo, Inc.

Takehiro Ida

Mitsuo Iwanaga

Kazufumi Yunoki

Hiroaki Yamagishi

Hideyuki Sakuramoto

Kenichiro Aoyagi

Shinya Takeda

Atsushi Ueki

Wuri Andarmawanti Hapsari

Yukihiko Okumura

Itsuma Tanaka

Masashi Kanauchi

Masato Maeda

Nobukazu Uno

Takuya Takimoto

Takahiro Yamane

Yoshimi Sokei

Yasushi Sakamoto

Wataru Matsuno

An object is to provide a mobile station, a mobile communication system, and a network device that can realize more appropriate call origination control per service as intended by an operator. An MMTEL function unit () of a UE (), based on ssac-BarringForMMTEL-Voice, upon determining that call origination of a VoLTE call is possible, transmits Bearer Request to an NAS function unit (). The NAS function unit (), in accordance with the Bearer Request, transmits Service Request to an RRC function unit (). The RRC function unit (), in accordance with the Service Request, based on ac-BarringForMO-Data or Tbarring, transmits RRC Connection Request to a mobile communication network () without determining a possibility of call origination of the VoLTE call.

Mobile station, mobile communication system, and network device

One aspect of the present invention relates to user equipment supporting an IMS function, comprising: an application layer configured to provide a user interface for a user to set ON or OFF the IMS function; a SIP layer configured to enable or disable transmission of a SIP signal to a resident network corresponding to user's setting ON or OFF the IMS function in the user interface; and a modem layer configured to change an IMS related Capability of the user equipment related to the IMS function corresponding to user's setting ON or OFF the IMS function in the user interface and communicate with the resident network based on the changed Capability.

User equipment, mobile communication system and method

A mobile station, a networking apparatus, and a mobile communication method with which access restriction according to SSAC can be achieved with greater reliability even when the mobile station is in an RRC CONNECTED state. A UEacquires restriction information indicating a content of Service Specific Access Control, and cancels transmission of a call-origination request based on the acquired restriction information if the call-origination request is generated when the UEis in an RRC CONNECTED state in which connection to an access network is established on a radio resource control layer, the transmission being cancelled in the RRC CONNECTED state.

Mobile station, networking apparatus, and mobile communication method

Execution of an application that functions when a mobile communication terminal is performing communication in a particular mobile communication network. A mobile communication terminal includes an application execution unit for executing one or more applications, a mobile communication unit for performing location registration in a mobile communication network for establishing a communication state, a communication network specifying unit for specifying the mobile communication network in which location registration is made, and an application control unit for performing control on the application execution unit so as to start an application corresponding to the specified mobile communication network.

Mobile communication terminal and terminal control method

A location registration processing method according to the present invention includes steps of: starting, at a mobile station (UE), the location registration processing on the basis of predetermined system information, when acquiring the predetermined system information among a plurality of pieces of system information broadcasted by a radio base station (eNB), the predetermined system information including information necessary for performing the location registration processing; and acquiring the rest of the plurality of pieces of system information.

Location registration processing method and mobile station

A mobile station (UE) according to the present invention includes a CSG cell management unit () configured to manage one or a plurality of CSG cell IDs; and a control unit () configured to eliminate, during a predetermined period included in received broadcast information, a first CSG cell specified by a first CSG cell ID included in the received broadcast information, from target cells of a cell selection, a cell reselection, a PLMN selection or an automatic CSG cell search, when the first CSG cell ID is not managed by the CSG cell management unit.

Mobile station, mobile communication method and network device

A mobile communication terminal holds a frequency cancellation list that is information related to cells that cannot be connected, and controls execution/non-execution (frequency cancellation) of the cell search according to the content of the cancellation list. In a case where a frequency is not assigned in a unified manner (when a frequency is assigned to different communication providers in some cells), a frequency cancellation time is set shorter than a case where the frequency is assigned in a unified manner. For example, a frequency fis rejected in a cell represented by 'another' surrounded by a broken line when the mobile communication terminal moves from an area A to an area B. When the mobile communication terminal further moves to an area C, the frequency cancellation process initiated in the area B terminates. This is because a short frequency cancellation time is set. Therefore, the frequency cancellation time expires while the mobile communication terminal is moving from the area B to the area C. The frequency cancellation terminates, so as to be connectable in the area C of the frequency f

Mobile communication terminal and mobile communication control method

A cell search control that can save power consumption at a mobile device and perform an appropriate in-service area determination is provided. The mobile device according to the present invention includes: a cell search execution unit () for detecting a synchronization channel from a base station to perform cell search; a signal reception determination unit () for comparing a measurement X of the signal from the base station with a system information reception threshold A and determining whether or not to receive a system information from the base station; and an in-service area determination unit () for comparing the measurement X with a minimum required quality level B contained in the system information and determining whether or not to enter into an in-service area state with the base station. Depending on the result of the in-service area determination unit, the reception threshold A or a waiting time for the cell search may be adjusted, or the base station may be excluded from the cell search. Thus, the power consumption at the mobile device can be saved, and an appropriate in-service area determination can be made even when the minimum required quality level B has been changed.

Cell search control method and mobile device using the method

A communication device comprises a receiver configured to receive a notification of a cipher parameter used for encryption of data and a requested start time at which the encryption starts; and a correction unit configured to determine whether the cipher parameter needs to be corrected in response to the notification having been retransmitted based on the requested start time and an actual start time at which the encryption actually starts, and correct the cipher parameter.

Communication device and communication control method

The present invention provides a mobile station able to shorten the processing time of selecting a serving base station and able to select an appropriate serving base station with which the mobile station communicates. Mobile phonereceives an advertisement message from a peripheral base station, until state of communication path to the peripheral base station remains above a reference level over the predetermined time period, 'Treselection', wherein the reference level is calculated by adding the parameter 'Qhyst' to state of communication path to the current serving base station. After detecting peripheral base station, mobile phoneignores the detection that the condition of changing base stations is fulfilled for another peripheral base station, until data storage area is updated in accordance with an advertisement message from the peripheral base station

Mobile station and base station selection scheme

A mobile phoneaccording to the present invention stores first broadcast information received from a base station Bin correspondence with first cell information in a storage unitWhen the mobile phonereceives second cell information from a base station Bit determines whether there is previously stored cell information identical with the second cell information, in a cell information storage tableWhen the result of the determination is that it is stored, the mobile phonereads out the first broadcast information and transfers to a cell according to the first broadcast information. When it is not stored, the mobile phone receives second broadcast information and transfers to a cell according to the second broadcast information. Namely, the mobile phonemakes the cell transfer according to minimum data within a range in which a cell as a potential transfer target can be identified.

Mobile communication terminal, broadcast information storing method, cell transfer method, and mobile communication system

A smaller number of frequencies are dynamically defined, from which a frequency to be used is first searched, failing which, all the frequencies available to a particular mobile communication system are searched, thereby frequency search is efficiently performed with a reduced power consumption.

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Yokosuka, Japan

Takehiro Ida