A method for wireless communication in a 3GPP system, comprising: configuring data duplication for a first logical channel and a second logical channel; configuring, by a terminal device, a mapping relationship between the first logical channel and a first carrier for transmitting data of the first logical channel; configuring, by the terminal device, a mapping relationship between the second logical channel and a second carrier for transmitting data of the second logical channel; wherein the first carrier and the second carrier are different; performing, by the terminal device, duplication transmission of data of one or more radio bearers, wherein a Packet Data Convergence Protocol, PDCP, packet data unit, PDU, is duplicated, and the PDCP PDU is transmitted in the first logical channel, and the duplication of the PDCP PDU is transmitted in the second logical channel; receiving, by the terminal device, first indication information sent by a network device, wherein the first indication information is used to indicate the terminal device to stop duplication transmission of data of one or more radio bearers; and releasing, by the terminal device, the mapping relationship between the first logical channel and the first carrier according to the first indication information; releasing, by the terminal device, the mapping relationship between the second logical channel and the second carrier according to the first indication information; mapping the first logical channel to all carriers of a plurality of carriers according to the first indication information; mapping the second logical channel to all carriers of the plurality of carriers according to the first indication information; transmitting data on the first logical channel and the second logical channel, wherein the data transmitted by the second logical channel is different from the data transmitted by the first logical channel, wherein the plurality of carriers are carriers configured by the network device for the terminal device. configuring data duplication for a first logical channel and a second logical channel; configuring, by a terminal device, a mapping relationship between the first logical channel and a first carrier for transmitting data of the first logical channel; configuring, by the terminal device, a mapping relationship between the second logical channel and a second carrier for transmitting data of the second logical channel; wherein the first carrier and the second carrier are different; performing, by the terminal device, duplication transmission of data of one or more radio bearers, wherein a Packet Data Convergence Protocol, PDCP, packet data unit, PDU, is duplicated, and the PDCP PDU is transmitted in the first logical channel, and the duplication of the PDCP PDU is transmitted in the second logical channel; receiving, by the terminal device, first indication information sent by a network device, wherein the first indication information is used to indicate the terminal device to stop duplication transmission of data of one or more radio bearers; and releasing, by the terminal device, the mapping relationship between the first logical channel and the first carrier according to the first indication information; releasing, by the terminal device, the mapping relationship between the second logical channel and the second carrier according to the first indication information; mapping the first logical channel to all carriers of a plurality of carriers according to the first indication information; mapping the second logical channel to all carriers of the plurality of carriers according to the first indication information; transmitting data on the first logical channel and the second logical channel, wherein the data transmitted by the second logical channel is different from the data transmitted by the first logical channel,