Mitsubishi Electric Corporation

Nippon Telegraph and Telephone Corporation

Tcl Communication Technology Holdings Limited

Mitsubishi Electronic Corporation

Mitsubishi Electric Company

Mitsuru Mochizuki

Miho Maeda

Yasushi Iwane

Noriyuki Fukui

Taisei Suemitsu

Masayuki Nakazawa

Tadahiro Shimoda

Kuniyuki Suzuki

Taiga Saegusa

Shinsuke Uga

Yuji Kakehi

Takayuki Nonami

Keiko Tada

Shigenori Tani

Michiaki Takano

Tetsuya Mishuku

Ryoichi Fujie

Fumihiro Hasegawa

Yasuhiro Onaka

Futoshi Katada

Osamu Matsuda

Hitoshi Seshimo

Yuichi Nakai

Masaaki Kusano

Akira Okubo

Haruka Suzuki

Keisuke Ozaki

Hirochika Hiraki

Hitoshi Kimura

Daisuke Hiramatsu

Yoshitaka Hara

Toshiki Tanaka

Hideki Morishige

Haruka Nozawa

Kyota Tsutsumida

Hideo Umehara

Koji Ono

Hiroyuki Shoji

Naohito Tomoe

Daichi Uchino

Fumiki Hasegawa

Yozo Fukuda

Akinori Taira

Yoshinori Takahashi

Kazunori Takahashi

Shigeru Uchida

Hiroki Iura

Hideyuki Nakamizo

Shinichiro Eitoku

Nobuaki Hiroshima

Etsuko Hokan

Tatsuya Itoh

Fusako Takayanagi

Taiki Taguchi

A communication system includes a communication terminal, and a serving base station of the communication terminal. The serving base station notifies the communication terminal of an instruction to configure a measurement gap for the communication terminal to measure a positioning signal transmitted from at least one neighboring base station in order to measure a position of the communication terminal, without a request from the communication terminal (Step ST).

Communication system and base station

Provided is a communication system capable of suppressing increase in the power consumption of a communication terminal device, degradation in the communication quality, and reduction in the use efficiency of radio resources. A base station device (gNB) notifies a communication terminal device (UE) of information on the next reception timing. The UE receives, for example, a downlink control signal in a subframe. The UE obtains, from the downlink control signal, information on a piece of user data in the subframe, and the information on the next reception timing. The UE transmits and receives the piece of user data to and from the gNB. The information on the next reception timing indicates a subframe as the next reception timing of the UE. The UE receives a downlink control signal in the subframe.

Communication system, base station and communication terminal

Provided is a communication system with low latency and high reliability, etc. Even after transitioning from RRC_CONNECTED to RRC_INACTIVE, a communication terminal device maintains secondary base station configuration information on configuring a secondary base station. Even when at least one of a master base station and a secondary base station is changed during the RRC_INACTIVE, the communication terminal device maintains the secondary base station configuration information. The communication terminal device again transitions to the RRC_CONNECTED using the maintained secondary base station configuration information.

User apparatus, base station and communication system

A route guidance apparatus according to an embodiment of the present disclosure includes a route search unit that performs a route search based on a route search instruction from a user including information indicating a departure place and a destination, a difficulty level calculation unit that calculates a difficulty level for each of the multiple routes obtained as a search result, a required time calculation unit that calculates a required time for each of the multiple routes, a spatial cognitive ability value acquisition unit that acquires a spatial cognitive ability value representing spatial cognitive ability of the user, a route selection unit that selects a route recommended to the user from the multiple routes based on the calculated difficulty level, the calculated required time, and the acquired spatial cognitive ability value, and an output unit that outputs the selected route.

Route guidance apparatus, route guidance method, and program

Provided is a technology that can increase the robustness of a communication system. A communication system includes: a communication terminal; a first network configured to perform radio communication with the communication terminal; and at least one second network configured to perform communication with the first network. When the first network determines to release connection between the first network and the communication terminal (ST) with the communication terminal being connected to the first network and to the at least one second network through the first network, the communication terminal or the first network instructs the at least one second network to release the connection with the communication terminal (ST).

Communication system, communication terminal, and network

A mobile terminaljudges whether or not the mobile terminal is able to make a transition to a DTX period during Active, and, when judging that the mobile terminal is able to make a transition to a DTX period during Active, notifies a base stationto that effect. If the base stationjudges that the mobile terminal is able to make a transition to a DRX period during Active when triggered by the notification from the mobile terminal, the base station temporarily stops supply of electric power to the data transmission processing units and the data reception processing units of the mobile terminal

Mobile communications system and mobile terminal

In a mobile communication system, an RRM measurement set is set as a collection of cells to become targets on which a UE performs a process of detecting whether or not radio communication is allowed. Among the cells in the RRM measurement set, a CoMP measurement set is set as a collection of cells to become candidates on which the UE performs a process of detecting whether or not coordinated communication (CoMP communication) is allowed. Among the cells of the CoMP measurement set, a CoMP active set is set as a collection of cells to become targets on which the UE performs the process of detecting whether or not CoMP communication is allowed.

Mobile communication system

When being connected to a macro cell (S-MeNB) and a small cell (SeNB), a user equipment device performs a pre-handover process of disconnecting the connection with the SeNB before a handover process of switching a macro cell connected with the UE from the macro cell (S-MeNB) that is a moving source to a macro cell (T-MeNB) that is a moving destination along with moving of the UE, and after the handover process, performs a post-handover process of reestablishing the connection with the SeNB.

Mobile communication system, base station, master base station, secondary base station and user equipment

A communication system is provided that can improve the communication capability of a communication terminal device in the case where a large number of small cells in addition to a macro cell are installed and operated. A communication terminal device (UE) is connected with a macro cell configured by a MeNB and a small cell configured by a SeNB, so that dual connectivity is performed. When receiving information for small cells, for example, emergency information from a CBC via an MME, at least one cell of the macro cell and the small cell notifies the communication terminal device connected with the at least one cell of the information for small cells.

Communication system

A radio communication technology with small delay is provided. A communication system includes a communication terminal and a base station. The base station includes a plurality of transmitter-receivers configured to perform radio communication with the communication terminal. The base station is configured to perform radio communication with the communication terminal by using a part or all of the plurality of transmitter-receivers. The communication terminal receives a downlink synchronization signal from at least one transmitter-receiver to be newly connected, and establishes downlink synchronization with the at least one transmitter-receiver by using the downlink synchronization signal. The communication terminal receives a random access start order from the base station, performs random access processing by using the random access start order, and establishes uplink synchronization with the at least one transmitter-receiver.

User apparatus, base station, and communication system

Provided is a communication system capable of suppressing, under communication environment including a plurality of cells, degradation in communication quality and decrease in communication rate and communication capacity due to interference from the other cells. Each of the cells includes a plurality of antenna elements, and performs radio communication with a communication terminal device through the antenna elements. Each of the cells notifies the other cells of settings for measuring channel information on a channel for performing radio communication of its own cell. Each of the cells may notify a communication terminal device being served thereby of the settings for measuring the channel information of its own cell. Here, the communication terminal device measures the channel information based on the settings notified from each of the cells, and reports a result of the measured channel information to a corresponding one of the cells when the result satisfies a predetermined reporting condition.

Communication system, base station and communication terminal device

A communication system includes a communication terminal device, a base station device performing radio communication with the communication terminal device, and a base station controller controlling the base station device. The communication terminal device is a machine type communication (MTC) device, The base station controller includes a mobility management entity (MME). Data is transmitted to the MME from the communication terminal device via the base station device.

The present invention has an object to provide a communication system capable of avoiding congestion in downlink communication or uplink communication and a shortage of radio resources arising therefrom. In the present invention, in a communication system including a normal user equipment (normal UE) that performs human to human communication and a machine type communication device (MTCD) that performs machine to machine communication, a base station device transmits a paging message to the normal UE and the MTCD for calling the normal UE and the MTCD. The paging message contains, for example, an equipment identity (UE-ID). A maximum number of equipment identities (UE-IDs) that can be accommodated within this paging message is set individually for the normal UE and the MTCD. Alternatively, the paging message contains a calling indicator in place of the equipment identity of the MTCD (UE-ID of MTCD).

Mobile communication system, base station, communication terminal device and MTC device

Radio resource management is simplified when a cell is spatially separated by a plurality of radio beams. A cell configured by a base station device is spatially separated by a plurality of radio beams being served by the base station device. The base station device shares, between two or more of the plurality of radio beams, a radio resource control (RRC) parameter to be applied to a communication terminal device.

A communication system capable of preventing unnecessary switching of an energy saving cell between a normal operation state and an energy saving state. An energy saving cell (ES cell) is in a dormant state that is the energy saving state. In this case, when being notified of a wake-up request message from a communication terminal device (UE), the ES cell executes access restriction control to judge whether the UE can access its own cell. If judging that the UE can access its own cell, the ES cell switches on its own cell and shifts from the dormant state to an active state that is the normal operation state.

Communication system, communication terminal device, first base station device and second base station device

Growing community of inventors

Tokyo, Japan

Mitsuru Mochizuki