Section: 5.4 Physical uplink control channel
Content: The physical uplink control channel, PUCCH, carries uplink control information. Simultaneous transmission of PUCCH and PUSCH from the same UE is supported if enabled by higher layers. For frame structure type 2, the PUCCH is not transmitted in the UpPTS field. The physical uplink control channel supports multiple formats as shown in Table 5.4-1 with different number of bits per subframe, where represents the bandwidth of the PUCCH format 4 as defined by clause 5.4.2B, and and are defined in Table 5.4.2C-1. Formats 2a and 2b are supported for normal cyclic prefix only. Table 5.4-1: Supported PUCCH formats All PUCCH formats use a cyclic shift, , which varies with the symbol number and the slot number according to where the pseudo-random sequence is defined by clause 7.2. The pseudo-random sequence generator shall be initialized with , where is given by clause 5.5.1.5 with corresponding to the primary cell, at the beginning of each radio frame. The physical resources used for PUCCH format 1/1a/1b and PUCCH format 2/2a/2b depends on two parameters, and , given by higher layers. The variable denotes the bandwidth in terms of resource blocks that are available for use by PUCCH formats 2/2a/2b transmission in each slot. The variable denotes the number of cyclic shift used for PUCCH formats 1/1a/1b in a resource block used for a mix of formats 1/1a/1b and 2/2a/2b. The value of is an integer multiple of within the range of {0, 1, …, 7}, where is provided by higher layers. No mixed resource block is present if . At most one resource block in each slot supports a mix of formats 1/1a/1b and 2/2a/2b. Resources used for transmission of PUCCH formats 1/1a/1b, 2/2a/2b, 3, 4, and 5 are represented by the non-negative indices , , , and , respectively.