A buffer status reporting method comprising: determining, for any radio bearer, RB, with duplication function configured or activated on a link, different logical channels of the RB belonging to different logic channel groups, wherein the link is a direct communication link from a terminal to another terminal, Sidelink, or a communication link from a terminal to a network side equipment, Uu link; and performing a buffer status reporting procedure based on buffer status of the different logic channel groups when a buffer status reporting condition is met; determining the different logic channels of the RB belonging to the different logic channel groups according to a corresponding relationship between a logic channel of the RB and a logic channel group; or determining the different logic channels of the RB belonging to the different logic channel groups according to a calculation formula with regarding to a logic channel of the RB and a logic channel group; characterized in that the corresponding relationship and/or the calculation formula is directly appointed according to a protocol, or the corresponding relationship and/or the calculation formula is configured by the network side equipment, and when the corresponding relationship and/or the calculation formula is configured by the network side equipment, the method further comprises: receiving a configuration signaling carrying information of the corresponding relationship or the calculation formula from the network side equipment, together with duplication configuration or activation signaling, through a broadcast; or receiving a configuration signaling carrying information of the corresponding relationship or the calculation formula from the network side equipment, together with duplication configuration or activation signaling, through a dedicated signaling. determining, for any radio bearer, RB, with duplication function configured or activated on a link, different logical channels of the RB belonging to different logic channel groups, wherein the link is a direct communication link from a terminal to another terminal, Sidelink, or a communication link from a terminal to a network side equipment, Uu link; and performing a buffer status reporting procedure based on buffer status of the different logic channel groups when a buffer status reporting condition is met; determining the different logic channels of the RB belonging to the different logic channel groups according to a corresponding relationship between a logic channel of the RB and a logic channel group; or determining the different logic channels of the RB belonging to the different logic channel groups according to a calculation formula with regarding to a logic channel of the RB and a logic channel group; characterized in that the corresponding relationship and/or the calculation formula is directly appointed according to a protocol, or the corresponding relationship and/or the calculation formula is configured by the network side equipment, and when the corresponding relationship and/or the calculation formula is configured by the network side equipment, the method further comprises: receiving a configuration signaling carrying information of the corresponding relationship or the calculation formula from the network side equipment, together with duplication configuration or activation signaling, through a broadcast; or receiving a configuration signaling carrying information of the corresponding relationship or the calculation formula from the network side equipment, together with duplication configuration or activation signaling, through a dedicated signaling. receiving a configuration signaling carrying information of the corresponding relationship or the calculation formula from the network side equipment, together with duplication configuration or activation signaling, through a broadcast; or receiving a configuration signaling carrying information of the corresponding relationship or the calculation formula from the network side equipment, together with duplication configuration or activation signaling, through a dedicated signaling.