The communication unit is polled by a receiver terminal having a receiver terminal identification information.

An antenna unit comprising a conductor base plate, a receiving element having a receiving terminal and arranged near the conductor base plate, and a transmitting element having a transmitting terminal and arranged near the receiving element.

The communication system (20) includes a sending end system (22) and a receiving end system (23).

The invention reduces the dependence of receiving terminal to timing IDLE messages, and shortens the service recover time of receiving terminal.

The apparatus includes a purchaser terminal, a contents server, and a receiver terminal.

The receiving terminal includes a demultiplexer and receivers.

The receiver terminal is charged with and stores electronic money, and a provider terminal performs a payment approving procedure for the electronic money charged to the receiver terminal.

The message is received provided that the receiver identification information agrees with the receiver terminal identification.

This invention relates to a transmission of a media from a sending terminal to a receiving terminal.

The personal protection system comprises a user terminal, an operating server, and a receiver terminal.

The targeting packet (2) is sent to the receiving terminal (Y).

The recipient intranet device determines an AN to be assigned to the recipient terminal under the condition under which the sender intranet device has determined an AN to be assigned to the sender terminal and notifies the fact to the recipient terminal.

A sender terminal transmits, to a data distribution terminal, communication data to be delivered to a receiver terminal.

Each communication group includes at least two communication terminals, one sending terminal and one receiving terminal.

In a receiving terminal inverse processing is provided to remove the chirp effect.