| 摘要 |
<p>In a multicasting system, the same information is transmitted from a base station to a plurality of mobile stations. A mobile station transmits a retransmit request signal to a base station if an error is detected in a received multicast signal. The base station determines whether it is a retransmit request based on the quality of the received signal, and retransmits the multicast signal if it is a retransmit request. A mobile station transmits a retransmit request signal to the base station if an error is detected in a multicast signal. The base station monitors the state of reception of the multicast signal at the mobile station, and transmits the multicast signal using a different type of transmission suitable for the mobile station depending on the result of monitoring.</p> |
