s. This offset is set to 1 only if the time interval from completion of the HARQ sub-packet transmission to its feedback time will be shorter than the data burst processing time; otherwise it is set to zero. The value of the offset also depends on whether a short Transmission Time Interval (TTI) or a long TTI of one or four subframes is used, respectively. In FDD mode, as shown in Figure 7-9, the UL HARQ sub-packet transmission corresponding to a UL Basic Assignment A-MAP IE in the qth subframe of the ith DL frame begins in the mth subframe CHAPTER 7 The IEEE 802. .16m MAC CPS (Part II) DL Basic Assignment UL Basic Assignment A-MAP IE A-MAP IE DL Frame i DL Frame k DL HARQ DL HARQ Feedback Packet UL Frame j UL Frame p UL HARQ UL HARQ Feedback Packet FIGURE 7-9 An illustration of downlink/uplink HARQ packet and feedback transmission in FDD mode of the jth UL frame. A HARQ feedback for the UL HARQ sub-packet is transmitted in the qth subframe of the kth DL frame. When the UL HARQ feedback indicates a negative acknowledgement, re-transmission of the UL HARQ sub-packet is scheduled in the mth subframe of the pth UL frame. The subframe indices m, n, and frame indices j, k, and p are defined according to the following equation [2]: = n = lq + SF / 2] mod SF Toffset mod 4 (7-2) mod 4 mod 4 The binary-valued offsets in the above equations are included to ensure the minimum processing time condition is met. In TDD mode, as shown in Figure 7-10, the DL HARQ sub-packet transmission corresponding to a DL Basic Assignment A-MAP IE in 1th DL subframe of the ith frame is scheduled in the mth DL subframe of the ith frame. A HARQ feedback for the DL HARQ sub-packet is transmitted in 7.2 Hybrid automatic repeat request functions DL Basic Assignment A-MAP IE Frame i- Frame j Frame k- SF=/ UL Basic SF=n SF=m Assignment UL HARQ DL HARQ A-MAP IE Feedback UL HARQ DL HARQ Packet Packet Feedback FIGURE 7-10 An illustration of downlink/Uplink HARQ packet and feedback transmission in TDD mode the nth UL subframe of the jth frame. The subfr