Ntt Docomo, Inc.

Motohiro Abe

Shinya Takeda

Wuri Andarmawanti Hapsari

Kenichiro Aoyagi

Alf Zugenmaier

Masataka Ikeda

Shin-Ichi Isobe

Hiromasa Yamaguchi

Mana Kaneko

Kazuto Shimizu

Shinichi Minamimoto

Koichiro Kunitomo

Yuuya Miyazaki

An exchange includes: a reception unit that receives, from a gateway, a message indicating presence of an incoming call to a terminal; a control unit that adjusts the time for transmitting paging corresponding to the message to a base station; and a transmission unit that transmits the paging to the base station at the adjusted time.

Network node and communication method for paging a terminal

A switch is provided. The switch is connected to a control apparatus for controlling Lawful Interception, and relays packets transmitted and received between a user apparatus and an IMS apparatus in the home network of the user apparatus. The switch includes a determination unit configured to determine whether the user apparatus is a Lawful Interception target or whether the user apparatus is a roaming user; and a transmission unit configured to, in the case where the user apparatus is a Lawful Interception target or in the case where the user apparatus is a roaming user, transmit to a mobile management switch information indicating to the user apparatus that the user apparatus should transmit and receive the packets to and from the IMS apparatus without encryption.

Switch and communication method

There is provided user equipment of a radio communication system including the user equipment, a base station, and a core network apparatus including a reception unit configured to receive information indicating one or more types of NAS protocols supported by the core network apparatus from the base station; a selection unit configured to select a type of a NAS protocol to be transmitted to the core network apparatus based on the information indicating the one or more types of the NAS protocols received by the reception unit; and a transmission unit configured to transmit a NAS message of the type of the NAS protocol selected by the selection unit to the core network apparatus.

User equipment, radio communication system, and communication method

A communication system in which a plurality of communication networks are interconnected, the communication system including a plurality of inter-communication network connections that include an inter-communication network connection by a first circuit performing communication by a first protocol and an inter-communication network connection by a second circuit performing communication by a second protocol, including: a route selection apparatus that is provided in a communication network that is connected to another communication network by the first circuit, and that is connected to another communication network by the second circuit; and an address resolution apparatus that can communicate with the route selection apparatus, wherein the route selection apparatus sends an inquiry to the address resolution apparatus about an address corresponding to an incoming number in a connection request signal transmitted from a user apparatus in the communication network so as to determine whether to transmit the connection request signal to a communication network of an incoming destination via the first circuit or to transmit the connection request signal to a communication network of an incoming destination via the second circuit based on a response received from the address resolution apparatus.

Communication system, route selection apparatus, and route selection method

Growing community of inventors

Tokyo, Japan

Motohiro Abe