A method, performed by a terminal device, for allocating a resource to a logical channel, comprising: determining a plurality of priority bit rates, PBRs, of the logical channel; receiving a first signaling sent by a network device; determining a target PBR according to the first signaling (S 120), wherein the first signaling is a physical layer signaling or a medium access control layer signaling; and determining a solution for allocating a granted resource to the logical channel according to the target PBR; receiving a second signaling sent by the network device, wherein the second signaling is used for instructing to adjust the target PBR; and setting the target PBR to infinity according to the second signaling; wherein the second signaling is a physical layer signaling or a medium access control layer signaling; wherein determining the target PBR according to the first signaling comprises: determining the target PBR among the plurality of PBRs according to the first signaling; wherein determining the target PBR among the plurality of PBRs according to the first signaling comprises: determining the target PBR according to indication information when determining that the first signaling comprises the indication information, wherein the indication information is used for indicating the target PBR; and determining a default PBR among the plurality of PBRs as the target PBR when determining that the first signaling does not comprise the indication information. determining a plurality of priority bit rates, PBRs, of the logical channel; receiving a first signaling sent by a network device; determining a target PBR according to the first signaling (S 120), wherein the first signaling is a physical layer signaling or a medium access control layer signaling; and determining a solution for allocating a granted resource to the logical channel according to the target PBR; receiving a second signaling sent by the network device, wherein the second signaling is used for instructing to adjust the target PBR; and setting the target PBR to infinity according to the second signaling; wherein the second signaling is a physical layer signaling or a medium access control layer signaling; wherein determining the target PBR according to the first signaling comprises: determining the target PBR among the plurality of PBRs according to the first signaling; wherein determining the target PBR among the plurality of PBRs according to the first signaling comprises: determining the target PBR according to indication information when determining that the first signaling comprises the indication information, wherein the indication information is used for indicating the target PBR; and determining a default PBR among the plurality of PBRs as the target PBR when determining that the first signaling does not comprise the indication information. determining the target PBR among the plurality of PBRs according to the first signaling; wherein determining the target PBR among the plurality of PBRs according to the first signaling comprises: determining the target PBR according to indication information when determining that the first signaling comprises the indication information, wherein the indication information is used for indicating the target PBR; and determining a default PBR among the plurality of PBRs as the target PBR when determining that the first signaling does not comprise the indication information. determining the target PBR according to indication information when determining that the first signaling comprises the indication information, wherein the indication information is used for indicating the target PBR; and determining a default PBR among the plurality of PBRs as the target PBR when determining that the first signaling does not comprise the indication information.