Patent ID: 8332704
Filing Date: 2012-12-11
Classification: H04L

Abstract:
1. A wireless multi-hop relay communication system, the system comprising: a terminal for transmitting an Automatic Retransmission reQuest (ARQ) block of a Media Access Control (MAC) layer in an access link; an access link relay station for determining if there is an error in the ARQ block received over the access link, for sending a Non-ACKnowledge (NACK) to the terminal when the ARQ block has an error, and for sending only a single ACKnowledge (ACK) regarding the ARQ block based on a predefined condition, wherein the predefined condition comprises one of a condition where the ARQ block has no error and a condition where a Relay-ACK (R-ACK) regarding the ARQ block is received from an upper node; and a base station for determining if there is an error in the ARQ block received over the relay link.