Nec Corporation

Nec C Orporation

Shingo Shiga

Toshiyuki Tamura

Shinji Onishi

Daisuke Mizukami

Kazuhiro Egashira

Sadafuku Hayashi

Kazuhiko Harasaki

A communication system capable of dynamically changing an MME to serve in call processing in accordance with the load condition of the MMEs and the like is provided. A communication system of the present invention includes: communication control apparatuses () to (); and a node apparatus () that executes call processing relating to a communication terminal with the communication control apparatuses () to (). The communication control apparatuses () to () form a context sharing group that shares subscriber data of the communication terminal. The node apparatus () selects a first communication control apparatus in the context sharing group, and transmits a call processing message to the first communication control apparatus. The first communication control apparatus executes the call processing using the subscriber data shared in the context sharing group.

Communication system, communication control apparatus, node apparatus, and communication method for performing load balancing in a system

An object of the present invention is to provide a vehicle communication system which distributes information which is necessary in vehicle units. A vehicle communication system according to the present invention includes: a vehicle base station which performs wireless communication with a vehicle terminal installed in a vehicle to receive vehicle related service; and a server apparatus which specifies the vehicle base station of a message distribution destination according to the vehicle related service to be provided, and distributes a message related to the vehicle related service to be provided, to the specified vehicle base station. When receiving the message transmitted from the server apparatus, the vehicle base station transmits the message to the vehicle terminal which subscribes to the vehicle related service related to the message, from a plurality of vehicle terminals and located in a communication area formed by the vehicle base station.

Vehicle communication system, base station, server apparatus, message transmitting method, vehicle related service providing method, and readable medium

Methods and systems for balancing load among communication control apparatuses

The radio communication system of the present invention includes a base station (), a mobility management node (), and a gateway (). The base station () transmits to the mobility management node () information of the origination addresses of neighboring base stations of the base station (). The mobility management node () receives information of the origination addresses of the neighboring base stations from the base station () and transmits the information of the origination addresses of the neighboring base stations to the gateway (). The gateway () receives information of the origination addresses of the neighboring base stations from the mobility management node ().

Radio communication system, base station, gateway, and radio communication method

A communication system providing a multimedia service that informs a calling terminal that a communication sent from the calling terminal to a called terminal is undesired by the called terminal. Typically, the calling terminal is connected to a calling-side communication network, and the called terminal is connected to a called-side communication network; the called-side communication network includes an access request receiving device that receives an access request sent from the calling terminal; an access request cancel determination device that determines whether or not the received access request is cancelled; and an access request cancel notice sending device that sends an access request cancel notice when the access request is cancelled; and the calling-side communication network includes an addressee information communicating device that communicates addressee information to the calling terminal based on the access request cancel notice, where the addressee information is information of an addressee to be accessed so as to withdraw the cancellation of the access request.

Communication system and communication control method

A communication system providing a multimedia service which enables requesting a communication network to cancel a registration for a calling terminal as a bad terminal in the communication network. Typically, the calling terminal is connected to a calling-side communication network; and if the calling terminal is registered as a bad terminal in a called-side communication network, the calling-side communication network requests the called-side communication network to cancel the registration. The calling terminal may be informed that reception of a communication in the communication system has been restricted.

Communication system and communication control method for requesting cancellation of registration as bad terminal

A media gateway, which generates a context based on a control message transmitted from a media gateway controller and controls bearer transfers between a first network and a second network, comprises a context determination unit, an optimization judgment unit, an optimization processing unit, and a context control unit. The context determination unit determines an existence of an internal connection between a first context related to the first network and a second context related to the second network based on the respective control messages. The optimization judgment unit judges a possibility for generating a new third context by combining the first context and the second context, when the internal connection exists. The optimization processing unit generates the third context when it is possible to generate, and associates resource information of the third context with each of resource information of the first context and the second context. The context control unit controls the bearer transfer between the first network and the second network based on the third context, and performs communication with the media gateway controller using respective resource information of the first context and the second context.

Growing community of inventors

Tokyo, Japan

Shingo Shiga