A method for a user equipment, LTE, to deliver a sidelink channel busy ratio, CBR, measurement report to a serving cell comprising an evolved universal terrestrial radio access, E-UTRA, serving cell or a new radio, NR, serving cell, the method comprising: receiving, by the UE, from the serving cell, a sidelink CBR measurement configuration associated with NR sidelink communication or E-UTRA vehicle to everything, V2X, sidelink communication on a PC5 interface; generating a sidelink CBR measurement report by monitoring at least one target resource pool allocated to the UE based on the received sidelink CBR measurement configuration; and transmitting the sidelink CBR measurement report to the serving cell, characterised in that: in a case that the serving cell comprises the E-UTRA serving cell and the sidelink CBR measurement configuration is associated with the NR sidelink communication: receiving the sidelink CBR measurement configuration comprises receiving the sidelink CBR measurement configuration through E-UTRA Radio Resource Control, RRC, signaling; and transmitting the sidelink CBR measurement report comprises transmitting an NR sidelink CBR measurement report to the E-UTRA serving cell through the E-UTRA RRC signaling, and in a case that the serving cell comprises the NR serving cell and the sidelink CBR measurement configuration is associated with the E-UTRA V2X sidelink communication: receiving the sidelink CBR measurement configuration comprises receiving the sidelink CBR measurement configuration through NR RRC signaling; and transmitting the sidelink CBR measurement report comprises transmitting an E-UTRA V2X sidelink CBR measurement report to the NR serving cell through the NR RRC signaling. receiving, by the UE, from the serving cell, a sidelink CBR measurement configuration associated with NR sidelink communication or E-UTRA vehicle to everything, V2X, sidelink communication on a PC5 interface; generating a sidelink CBR measurement report by monitoring at least one target resource pool allocated to the UE based on the received sidelink CBR measurement configuration; and transmitting the sidelink CBR measurement report to the serving cell, characterised in that: in a case that the serving cell comprises the E-UTRA serving cell and the sidelink CBR measurement configuration is associated with the NR sidelink communication: receiving the sidelink CBR measurement configuration comprises receiving the sidelink CBR measurement configuration through E-UTRA Radio Resource Control, RRC, signaling; and transmitting the sidelink CBR measurement report comprises transmitting an NR sidelink CBR measurement report to the E-UTRA serving cell through the E-UTRA RRC signaling, and in a case that the serving cell comprises the NR serving cell and the sidelink CBR measurement configuration is associated with the E-UTRA V2X sidelink communication: receiving the sidelink CBR measurement configuration comprises receiving the sidelink CBR measurement configuration through NR RRC signaling; and transmitting the sidelink CBR measurement report comprises transmitting an E-UTRA V2X sidelink CBR measurement report to the NR serving cell through the NR RRC signaling. in a case that the serving cell comprises the E-UTRA serving cell and the sidelink CBR measurement configuration is associated with the NR sidelink communication: receiving the sidelink CBR measurement configuration comprises receiving the sidelink CBR measurement configuration through E-UTRA Radio Resource Control, RRC, signaling; and transmitting the sidelink CBR measurement report comprises transmitting an NR sidelink CBR measurement report to the E-UTRA serving cell through the E-UTRA RRC signaling, and receiving the sidelink CBR measurement configuration comprises receiving the sidelink CBR measurement configuration through E-UTRA Radio Resource Control, RRC, signaling; and transmitting the sidelink CBR measurement report comprises transmitting an NR sidelink CBR measurement report to the E-UTRA serving cell through the E-UTRA RRC signaling, and in a case that the serving cell comprises the NR serving cell and the sidelink CBR measurement configuration is associated with the E-UTRA V2X sidelink communication: receiving the sidelink CBR measurement configuration comprises receiving the sidelink CBR measurement configuration through NR RRC signaling; and transmitting the sidelink CBR measurement report comprises transmitting an E-UTRA V2X sidelink CBR measurement report to the NR serving cell through the NR RRC signaling. receiving the sidelink CBR measurement configuration comprises receiving the sidelink CBR measurement configuration through NR RRC signaling; and transmitting the sidelink CBR measurement report comprises transmitting an E-UTRA V2X sidelink CBR measurement report to the NR serving cell through the NR RRC signaling.