An apparatus, comprising: a non-transitory computer-readable memory medium; and a processor coupled to the memory medium and configured to cause a wireless user equipment, UE, device to: determine a slot structure (910, 920, 930) for uplink communication; determine an uplink control channel module structure and a number of symbols for reference signals of the UE device within the uplink control channel module structure to use for transmitting uplink control information via an uplink control channel, wherein the uplink control channel module structure is determined from a plurality of uplink control channel module structures corresponding to different numbers of symbols, wherein the number of symbols for reference signals of the uplink control module structure is determined based at least in part on an amount of the uplink control information to be transmitted, wherein, when the number of symbols for reference signals is determined to be one and the number of symbols of the determined uplink control channel module structure is five, the reference signal is located in a third symbol in the uplink control channel module structure; and transmit the uplink control information via the uplink control channel according to the uplink control channel module structure and the determined number of symbols for reference signals within the uplink control channel module structure, wherein the uplink control channel has a format that is modular, wherein two of the uplink control module structures are used for the uplink control information transmission. a non-transitory computer-readable memory medium; and a processor coupled to the memory medium and configured to cause a wireless user equipment, UE, device to: determine a slot structure (910, 920, 930) for uplink communication; determine an uplink control channel module structure and a number of symbols for reference signals of the UE device within the uplink control channel module structure to use for transmitting uplink control information via an uplink control channel, wherein the uplink control channel module structure is determined from a plurality of uplink control channel module structures corresponding to different numbers of symbols, wherein the number of symbols for reference signals of the uplink control module structure is determined based at least in part on an amount of the uplink control information to be transmitted, wherein, when the number of symbols for reference signals is determined to be one and the number of symbols of the determined uplink control channel module structure is five, the reference signal is located in a third symbol in the uplink control channel module structure; and transmit the uplink control information via the uplink control channel according to the uplink control channel module structure and the determined number of symbols for reference signals within the uplink control channel module structure, wherein the uplink control channel has a format that is modular, wherein two of the uplink control module structures are used for the uplink control information transmission. determine a slot structure (910, 920, 930) for uplink communication; determine an uplink control channel module structure and a number of symbols for reference signals of the UE device within the uplink control channel module structure to use for transmitting uplink control information via an uplink control channel, wherein the uplink control channel module structure is determined from a plurality of uplink control channel module structures corresponding to different numbers of symbols, wherein the number of symbols for reference signals of the uplink control module structure is determined based at least in part on an amount of the uplink control information to be transmitted, wherein, when the number of symbols for reference signals is determined to be one and the number of symbols of the determined uplink control channel module structure is five, the reference signal is located in a third symbol in the uplink control channel module structure; and transmit the uplink control information via the uplink control channel according to the uplink control channel module structure and the determined number of symbols for reference signals within the uplink control channel module structure, wherein the uplink control channel has a format that is modular, wherein two of the uplink control module structures are used for the uplink control information transmission.