Performing selective scheduling on uplink frequencies using sounding reference signals (SRS)

A data transmission apparatus, comprising:

• an information configuration circuit, configured to determine configuration information of a physical uplink control channel (PUCCH) and configuration information of an uplink sounding reference signal (SRS), wherein the configuration information of the PUCCH indicates a frequency-domain resource for transmitting the PUCCH, the configuration information of the SRS indicates a frequency-domain resource for transmitting the SRS, wherein the frequency-domain resource for transmitting the PUCCH and the frequency-domain resource for transmitting the SRS in a same subframe are different, wherein the PUCCH is mapped to a last symbol of the subframe, wherein the SRS is mapped to the last symbol of the subframe, and wherein the information configuration circuit comprises a first information configuration module, wherein the configuration information of the SRS, determined by the first information configuration module, comprises:
• a minimum frequency hopping period of the SRS, frequency hopping periods of the SRS that are configured in different time offsets, a frequency bandwidth occupied by the SRS, a frequency domain start location, and a frequency hopping rule in each frequency hopping period of the SRS, and wherein, the configuration information of the PUCCH, determined by the first information configuration module, comprises:
• a minimum frequency hopping period of the PUCCH, wherein the minimum frequency hopping period of the PUCCH is the same as the minimum frequency hopping period of the SRS;
• frequency hopping periods of the PUCCH that are configured in different time offsets, wherein a frequency hopping period of the PUCCH and a frequency hopping period of the SRS that are configured in a same time offset are the same;
• and a frequency bandwidth occupied by the PUCCH, a frequency domain start location, and a frequency hopping rule in each frequency hopping period of the PUCCH, wherein the frequency hopping rule of the PUCCH is the same as the frequency hopping rule of the SRS, the frequency domain start location of the SRS is outside the frequency-domain resource of the PUCCH, and an initial frequency-domain resource of the SRS and an initial frequency-domain resource of the PUCCH are not overlapped;
• a data sending circuit, configured to send the configuration information of the PUCCH and the configuration information of the SRS to user equipment (UE) in a cell;
• a first subcarrier receiving circuit, configured to receive, according to the configuration information of the PUCCH, a subcarrier that carries the PUCCH sent by the UE, wherein the first subcarrier receiving circuit comprises a first frequency-domain resource determining module, configured to determine, according to the configuration information of the PUCCH, a frequency-domain resource occupied by the subcarrier that carries the PUCCH in a current subframe and a first subcarrier receiving module, configured to receive the subcarrier in the frequency-domain resource, wherein, the first frequency-domain resource determining module determining, according to the configuration information of the PUCCH, a frequency-domain resource occupied by the subcarrier that carries the PUCCH in a current subframe comprises:
• calculating a time offset Toffset,cell of the PUCCH in the current subframe according to a sequence number N of the current subframe and the minimum frequency hopping period TPUCCH,cell of the PUCCH, wherein Toffset,cell=N mod TPUCCH,cell;
• a first demodulation circuit, configured to demodulate the subcarrier that carries the PUCCH to obtain the PUCCH;
• a second subcarrier receiving circuit, configured to receive, according to the configuration information of the SRS, a subcarrier that carries the SRS sent by the UE;
• and
• a second demodulation circuit, configured to demodulate the subcarrier that carries the SRS to obtain the SRS.