Sub-carrier allocation in a wireless communication system

摘要

A radio base station, a relay node and a respective method therein are provided for communicating data to a user equipment, the relay node being associated with the base station, wherein a downlink transmission to the user equipment is scheduled on subframe(s) available for the base station. The method in the radio base station comprises detecting that at least a part of the available subframes are not needed for downlink transmission to the relay node; and un-reserving at least one of the not needed subframes. The method further comprises transmitting, to the relay node, a release notification message notifying the relay node of the unreserved subframes for enabling the relay node to use the unreserved subframes for downlink transmission.

主权项

1. A method, in a radio base station connected to an associated relay node, for controlling the relay node with regards to subframes available for the radio base station for downlink transmission, the method comprising:
detecting that at least a part of said available subframes are not needed for downlink transmission to the relay node, un-reserving at least one of said not needed subframes; transmitting, to the relay node, a release notification message notifying the relay node of the unreserved subframes for enabling the relay node to use the unreserved subframes for downlink transmission; said detecting comprises receiving a request from the relay node for releasing subframes to be available for the relay node for downlink transmission; starting a Subframe Release, SR, timer; and when one of said SR timer expires and an indication is received from said relay node indicating that the relay node no longer requires release of subframes, scheduling the available downlink subframes for downlink transmission.