Nec Corporation

Shin Harada

Kazuhiro Takahashi

Yoshihiro Ono

Junpei Kamimura

Takehiko Kashiwagi

Takashi Shiraki

Fumitaka Nakahara

A half-duplex communication system that allows a user terminal to confirm past communication contents even during a series of half-duplex communications is provided. The system includes a communication record database in which all communication contents of half-duplex communications are stored together with identifiers thereof. A half-duplex communication device for controlling half-duplex communications includes a communication record control device which receives a communication content, transmits the communication content together with the identifier thereof to the communication record database so as to store it therein, and reads out the communication record therein. In response to a communication record readout request, the half-duplex communication device reads out a communication record in place of transmitting the communication content to a user terminal.

Half-duplex communication system, half-duplex communication device, communication content confirmation method, and its program

The object of the present invention is to realize a method and a server which enable insertion of advertisement even in voice communication including multimedia communication. The server is configured as a server for managing PoC communication among multiple terminals, comprising: a right-to-speak management section for managing the right to speak of the multiple terminals; a data distribution section for transmitting and receiving data to and from the multiple terminals; and an advertisement control section for storing advertisement data and transmitting the stored advertisement data to the multiple terminals via the data distribution section.

Method for inserting advertisement into PoC and extended-PoC communication system

Growing community of inventors

Tokyo, Japan

Shin Harada