Patent ID: 9735925
Date: 2017-08-15
CPC Classifications: H04L

Claim:
1. A method for performing Hybrid Automatic Repeat Request (HARQ) by a first terminal in a wireless communication system, the method comprising: transmitting data using a specific code word selected from a plurality of code words included in a mother code; calculating a Bit Error Rate (BER) upper bound for a second terminal that receives the data; calculating a BER lower bound for a third terminal that is able to eavesdrop the data; and performing the HARQ based on whether the BER upper bound is greater than a BER reference level for the second terminal and whether a probability of the BER lower bound being less than the calculated BER reference level is less than a predetermined value, wherein the BER upper bound is determined based on a transmission rate corresponding to the mother code and channel information corresponding to the second terminal, and wherein the BER lower bound is determined based on the transmission rate and channel information corresponding to the third terminal.