System and method for message acknowledgment feedback for device-to-device communication overlaid on a cellular network

摘要

An embodiment of a system for operating a communications controller for a group of user equipments engaged in a direct mobile communication (“DMC”) link in a wireless communications system is provided. The communications controller is configured to allocate a set of subframes to the group of UEs for the DMC link, signal the set of allocated subframes to the group of UEs, and signal a length of a sliding window to the group of UEs. In an embodiment, ACK/NACK feedback for communications over the DMC link is aggregated according to the length of the sliding window, and the ACK/NACK feedback for the communications over the DMC link is determined independently from ACK/NACK feedback for cellular transmission between the communication controller and the group of UEs. In an embodiment, the length of the sliding window is a number of subframes.

主权项

1. A method of operating a communications controller for a direct mobile communication (DMC) link for a group of user equipments (UEs), the method comprising:
allocating a set of subframes to the group of UEs for the DMC link; signaling the set of allocated subframes to the group of UEs; and indicating a length of a sliding window to the group of UEs for UEs of the group of UEs to aggregate acknowledgment and negative acknowledgement (ACK/NACK) feedback for communications over the DMC link according to the length of the sliding window, wherein the aggregated ACK/NACK feedback retains individual ACK and NACK information; wherein the length of the sliding window is determined from the allocated set of subframes, and wherein the ACK/NACK feedback for the communications over the DMC link is determined independently from ACK/NACK feedback for cellular transmission between the communication controller and the group of UEs.