Mobile Technology 






Overall Concept of HARQ is similar in 3G(HSPA), 4G and 5G, but the detailed mechanism is very different from each other. When you study the mechanism of HARQ, it would be good to have following questions in your mind and study the details.

  • How many HARQ process are supported ?
  • How the timing gap between data transmission and corresponding HARQ response ?
  • How the number of HARQ bit is determined.

You may find the details below on HARQ process for each radio technology.