Method for multicast transmission based on channel feedback

A method performed by a terminal to provide a base station with channel feedback for multicast transmission, the method comprising:

• receiving allocation information associated with a feedback channel among a plurality of feedback channels allocated to respective ones of a plurality of multicast groups, the feedback channel including M resources shared between the terminal and another terminal, wherein M is an integer of more than 1;
• determining feedback information based on an estimated channel with the base station;
• encoding the feedback information as an M-bit string;
• setting, based on the M-bit string, each of M transmission power levels for the M resources as a first transmission power level or a second transmission power level;
• and
• transmitting channel feedback to the base station on the feedback channel with transmission powers corresponding to the M transmission power levels for the M resources such that the base station simultaneously receives the channel feedback from the terminal and the another terminal, the channel feedback being utilized by the base station to determine a transmission parameter, and to provide the multicast transmission to the terminal and the another terminal based on the transmission parameter.

A method of providing multicast transmission to a plurality of terminals, the method comprising:

• allocating different ones of a plurality of feedback channels to respective ones of a plurality of multicast groups;
• providing the plurality of terminals with allocation information associated with a feedback channel among the plurality of feedback channels, the feedback channel including a plurality of resources shared with the plurality of terminals;
• simultaneously receiving, over the feedback channel, a plurality of channel feedbacks from the plurality of terminals;
• determining a transmission parameter based on a plurality of reception power accumulated in the plurality of resources using the plurality of channel feedbacks;
• and
• providing the multicast transmission to the plurality of terminals based on the transmission parameter.