METHOD OF EXECUTING HYBRID AUTOMATIC-REPEAT-REQUEST (HARQ) OPERATION ON RADIO ORTHOGONAL FREQUENCY-DIVISION MULTIPLE ACCESS NETWORK

摘要

PROBLEM TO BE SOLVED: To provide a new protocol adaptable to time-dependently changing quality resulting from mobility or channel fading in division or fragmentation of bit data. SOLUTION: A hybrid automatic-repeat-request (HARQ) operation is carried out on a radio orthogonal frequency-division multiple access (OFDMA) network. A channel quality between a transmitter and a receiver is assumed to be an error metric. A packet for the HARQ operation is fragmented adaptively in compliance with the assumed error metric. The fragmentation is executed at a HARQ layer when the error metric is lower than a given threshold, and is executed at a MAC layer when the error metric is not lower than a given threshold. COPYRIGHT: (C)2009,JPO&INPIT