According to the rule, the base station and UE respectively derive the scheduling unit used by the PUCCH starting from the start scheduling unit, and mapping of the PUCCH in the derived scheduling unit. Specifically, it is required that the PUCCH spans multiple slots, and the number of symbols included in the PUCCH in the multiple slots is the same, if the scheduling unit has the number of symbols that satisfies the requirements, the scheduling unit is considered as a slot for the PUCCH spanning multiple slots, and a start symbol position of mapping of the PUCCH in the slot is adjusted. Types of slots are not distinguished here, whether there is the number of uplink OFDM symbols available in the slot is only required (the symbol position is not required), that is, no matter what types of the slot are a slot may be used as a subsequent slot carrying the PUCCH spanning the slots as long as the foregoing number of symbols is satisfied.
In one carrier, a slot n is indicated as a start slot of the PUCCH, assuming that the PUCCH is configured to span 3 slots and there are 4 uplink OFDM symbols in each slot to carry the PUCCH, the UE also needs to determine another 2 slots after the slot n to carry the PUCCH. In this embodiment, the base station and the UE determine the remaining slots according to the following rule.