A communication apparatus, wherein the apparatus comprises: a receiving unit , configured to receive a downlink configuration signaling from an access network device; wherein the downlink configuration signaling indicates a time-frequency resource of a downlink reference signal and a plurality of uplink sounding reference signal, SRS, resources, wherein different uplink SRS resources correspond to different uplink ports, and the receiving unit , is further configured to receive the downlink reference signal from the access network device; a processing unit , configured to measure the downlink reference signal, to obtain a plurality of uplink precoding vectors; and a sending unit , configured to send SRSs to the access network device on the plurality of uplink SRS resources, wherein SRSs sent on different uplink SRS resources are precoded by using different uplink precoding vectors of the plurality of uplink precoding vectors, wherein the receiving unit is further configured to receive an uplink scheduling signaling from the access network device, wherein the uplink scheduling signaling indicates a resource index of at least one of the uplink SRS resources and the uplink scheduling signaling comprises first-level control signaling and second-level control signaling, wherein the first-level control signaling indicates common scheduling information in M transmission modes and the second-level control signaling indicates specific scheduling information in the M transmission modes, M is an integer greater than or equal to 2; the processing unit is further configured to precode uplink data according to an uplink precoding vector corresponding to the resource index; and the sending unit is further configured to send the precoded uplink data to the access network device. a receiving unit , configured to receive a downlink configuration signaling from an access network device; wherein the downlink configuration signaling indicates a time-frequency resource of a downlink reference signal and a plurality of uplink sounding reference signal, SRS, resources, wherein different uplink SRS resources correspond to different uplink ports, and the receiving unit , is further configured to receive the downlink reference signal from the access network device; a processing unit , configured to measure the downlink reference signal, to obtain a plurality of uplink precoding vectors; and a sending unit , configured to send SRSs to the access network device on the plurality of uplink SRS resources, wherein SRSs sent on different uplink SRS resources are precoded by using different uplink precoding vectors of the plurality of uplink precoding vectors, wherein the receiving unit is further configured to receive an uplink scheduling signaling from the access network device, wherein the uplink scheduling signaling indicates a resource index of at least one of the uplink SRS resources and the uplink scheduling signaling comprises first-level control signaling and second-level control signaling, wherein the first-level control signaling indicates common scheduling information in M transmission modes and the second-level control signaling indicates specific scheduling information in the M transmission modes, M is an integer greater than or equal to 2; the processing unit is further configured to precode uplink data according to an uplink precoding vector corresponding to the resource index; and the sending unit is further configured to send the precoded uplink data to the access network device. <EOS>