Method and apparatus for providing multicast service and method and apparatus for allocating multicast service resource in terminal-to-terminal direct communication

A method of allocating a resource for a multicast service by a multicast coordinator in a terminal-to-terminal direct communication, the method comprising:

• receiving from a multicast server a multicast session start request message requesting resource allocation for a multicast service in accordance with a request of a terminal starting the multicast service;
• allocating a resource to the multicast service;
• storing resource information of the allocated resource and information on the multicast service;
• and
• transmitting a resource allocation request message including the resource information to a plurality of base stations.

An apparatus for allocating a resource for a multicast service in a terminal-to-terminal direct communication, the apparatus comprising:

• a database;
• a processor configured to allocate a resource to a multicast service in response to a multicast session start request message that is transmitted by a multicast server in accordance with a request of a terminal starting the multicast service, and store resource information of the allocated resource and information on the multicast service in the database;
• and
• a transceiver configured to receive the multicast session start request message and to transmit a resource allocation request message including the resource information to a plurality of base stations.