A wireless communication method for transmission user equipment, transmission UE, Tx UE, comprising: determining multi-carrier configuration request information, to request a network device to configure multiple carriers for sidelink communication between the transmission user equipment and reception user equipment, reception UE, Rx UE; sending the multi-carrier configuration request information to the network device; and receiving, from the network device, first information indicating a multi-carrier configuration, wherein the first information comprises information related to multiple carriers configured by the network device for the transmission user equipment; wherein the first information comprises information that the network device indicates, from the multiple carriers, one carrier to be used as a primary carrier; wherein the method further comprises: determining whether a sidelink connection used for the sidelink communication can be established to the reception user equipment based on the primary carrier; and when it is determined that the sidelink connection cannot be established to the reception user equipment based on the primary carrier within a threshold time period after information for requesting the sidelink connection is sent to the reception user equipment, sending at least one of the following pieces of information to the network device: information about a failure in establishing the sidelink connection and information for requesting the network device to re-indicate a primary carrier. determining multi-carrier configuration request information, to request a network device to configure multiple carriers for sidelink communication between the transmission user equipment and reception user equipment, reception UE, Rx UE; sending the multi-carrier configuration request information to the network device; and receiving, from the network device, first information indicating a multi-carrier configuration, wherein the first information comprises information related to multiple carriers configured by the network device for the transmission user equipment; wherein the first information comprises information that the network device indicates, from the multiple carriers, one carrier to be used as a primary carrier; wherein the method further comprises: determining whether a sidelink connection used for the sidelink communication can be established to the reception user equipment based on the primary carrier; and when it is determined that the sidelink connection cannot be established to the reception user equipment based on the primary carrier within a threshold time period after information for requesting the sidelink connection is sent to the reception user equipment, sending at least one of the following pieces of information to the network device: information about a failure in establishing the sidelink connection and information for requesting the network device to re-indicate a primary carrier. determining whether a sidelink connection used for the sidelink communication can be established to the reception user equipment based on the primary carrier; and when it is determined that the sidelink connection cannot be established to the reception user equipment based on the primary carrier within a threshold time period after information for requesting the sidelink connection is sent to the reception user equipment, sending at least one of the following pieces of information to the network device: information about a failure in establishing the sidelink connection and information for requesting the network device to re-indicate a primary carrier.