RESOURCES FOR MULTI-CELL CHANNEL STATE INFORMATION FEEDBACK

摘要

User Equipment reports single-cell or multi-cell channel state information to a base station on a Physical Uplink Control Channel (PUCCH) Format 3 (PF 3) resource. The PF 3 resource selected depends on whether ACK/NACK needs to be reported simultaneously. Different coding and/or scrambling and/or interleaving schemes are used depending on whether ACK/NACK bits are present, as well as the number of ACK/NACK and/or CSI bits. Resource compatibility is maintained independently of the details of coding, interleaving, or scrambling—that is, all formats can be orthogonally multiplexed onto the same time-frequency resources. The format used for CSI only is PF 3c whereas the format used for CSI and ACK/NACK is PF 3b. PUCCH Formats 3b and 3c may be further differentiated depending on whether a CSI from a single or multiple cells are reported, or from which cells (PCell, SCell) an ACK/NACK is reported.