A technology enabling a base station to transmit acknowledgement (ACK)/negative ACK (NACK) information about data received from a terminal is provided. A cyclic shift value difference of each terminal may be maximized and a radio resource for transmitting the ACK/NACK information may be assigned without collision.

 
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< System and Method for Transmitting A Warning Message Via A Radio Network

< COMBINED BLUETOOTH/ALTERNATE RADIO ENVIRONMENT WITH CRITERION FOR REPORTING A CONDITION OF THE ALTERNATE RADIO DEFINED IN A PHYSICAL ABSTRACTION LAYER ASSOCIATED WITH THE ALTERNATE RADIO

> Antenna device having no less than two antenna elements

> COMMUNICATION SYSTEM, THRESHOLD MANAGEMENT SERVER, RADIO COMMUNICATION DEVICE, AND COMMUNICATION METHOD
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