System and Method for Terminal-Group Based HARQ for Cellular Integrated D2D Communications

摘要

System and method embodiments are provided to support network communications with groups of UEs. The embodiments include a two-level group-based hybrid-automatic repeat request (HARQ) mechanism and acknowledgement (ACK)/negative ACK (NACK) feedback. An embodiment method includes receiving, at a UE within a virtual multi-point (ViMP) comprising UEs, a data packet for a target UE (TUE) that is broadcasted from a base station (BS) to the ViMP node, decode the data packet, and upon successfully decoding the data packet, broadcasting the data packet to the UEs within the ViMP node until a timer pre-established by the BS expires or an ACK message is received from the TUE or the ViMP node. In an embodiment, broadcasted data received in the ViMP node is re-broadcasted upon receiving a negative acknowledgment (NACK) message from the TUE, a beacon UE, or any of the UEs within the ViMP node.

主权项

1. A method for supporting two-level terminal-group based hybrid-automatic repeat request (HARM) signaling, the method comprising:
receiving, at a cooperating user equipment (CUE) within a virtual multi-point (ViMP) node comprising a plurality of UEs, a data packet for a target UE (TUE) that is broadcasted from a base station (BS) to the ViMP node; successfully decoding the data packet; without receiving an acknowledgement (ACK) message or a negative ACK (NACK) message from the TUE, broadcasting, by the CUE, the data packet within the ViMP node; and without receiving a negative acknowledgement (NACK) message from the TUE, rebroadcasting, by the CUE, the data packet within the ViMP node until either the CUE receives another broadcast of the data packet from the BS, or the CUE receives an acknowledgement (ACK) message from the TUE or the ViMP node.