Section: 10.1.4.1.3 Group hopping
Content: For the reference signal for NPUSCH format 1, sequence-group hopping can be enabled where the sequence-group number in slot of a radio frame is defined by a group hopping pattern and a sequence-shift pattern according to where the number of reference signal sequences available for each resource unit size, is given by Table 10.1.4.1.3-1. Table 10.1.4.1.3-1: Definition of Sequence-group hopping can be enabled or disabled by means of the cell-specific parameter groupHoppingEnabled provided by higher layers. Sequence-group hopping for NPUSCH can be disabled for a certain UE through the higher-layer parameter groupHoppingDisabled despite being enabled on a cell basis unless the NPUSCH transmission corresponds to a Random Access Response Grant or a retransmission of the same transport block as part of the contention based random access procedure. The group-hopping pattern is given by where for . When , for frame structure type 1, is the slot number of the first slot of the resource unit and for frame structure type 2, is the frame number of the first slot of the resource unit. The pseudo-random sequence is defined by clause 7.2. The pseudo-random sequence generator shall be initialized with at the beginning of the resource unit for and in every even slot for . The sequence-shift pattern is given by where is given by higher-layer parameter groupAssignmentNPUSCH. If no value is signalled, .