A method for determining Scheduling Grant, comprising: determining, by a User Equipment, a non-quantization power gain factor of an Enhanced Dedicated Channel (E-DCH) Dedicated Physical Data Channel (E-DPDCH) required by an E-DCH Transport Format Combination Indicator (E-TFCI); generating, by the UE, a new quantization table of Δ E-DPDCH by expanding a quantization table of Δ E-DPDCH when E-TFCI>E-TFCI boost as adaptation to a case that the UE uses or does not use the E-TFCI boost; selecting, by the UE, a quantization table of Δ E-DPDCH when E-TFCI≤E-TFCI boost or the quantization table of Δ E-DPDCH when E-TFCI>E-TFCI boost when it is determined the UE does not use the new quantization table of Δ E-DPDCH according to a capability of the UE; or, selecting, by the UE, the new quantization table of Δ E-DPDCH when it is determined the UE uses the new quantization table of Δ E-DPDCH according to a capability of the UE; when a ratio of the non-quantization power gain factor of the E-DPDCH to a power gain factor of a Dedicated Physical Control Channel (DPCCH) is less than a minimum quantized value of Δ E-DPDCH in a selected quantization table of Δ E-DPDCH, setting the quantization power gain factor of the E-DPDCH required by the E-TFCI as a power gain factor of an E-DPDCH corresponding to the minimum quantized value of Δ E-DPDCH; otherwise, determining power gain factors of E-DPDCHs corresponding to various quantized values of Δ E-DPDCH in the selected quantization table of Δ E-DPDCH, determining power gain factors being less than or equal to the non-quantization power gain factor of the E-DPDCH, selecting a maximum value from the power gain factors less than or equal to the non-quantization power gain factor of the E-DPDCH, and setting the maximum value as the quantization power gain factor of the E-DPDCH required by the E-TFCI; and performing, by the UE, a sum of squares on quantization power gain factors of various E-DPDCHs required by the E-TFCI, and obtaining SG required by the E-TFCI which is equal to the sum of squares on power gain factors of various E-DPDCHs required by the E-TFCI. determining, by a User Equipment, a non-quantization power gain factor of an Enhanced Dedicated Channel (E-DCH) Dedicated Physical Data Channel (E-DPDCH) required by an E-DCH Transport Format Combination Indicator (E-TFCI); generating, by the UE, a new quantization table of Δ E-DPDCH by expanding a quantization table of Δ E-DPDCH when E-TFCI>E-TFCI boost as adaptation to a case that the UE uses or does not use the E-TFCI boost; selecting, by the UE, a quantization table of Δ E-DPDCH when E-TFCI≤E-TFCI boost or the quantization table of Δ E-DPDCH when E-TFCI>E-TFCI boost when it is determined the UE does not use the new quantization table of Δ E-DPDCH according to a capability of the UE; or, selecting, by the UE, the new quantization table of Δ E-DPDCH when it is determined the UE uses the new quantization table of Δ E-DPDCH according to a capability of the UE; when a ratio of the non-quantization power gain factor of the E-DPDCH to a power gain factor of a Dedicated Physical Control Channel (DPCCH) is less than a minimum quantized value of Δ E-DPDCH in a selected quantization table of Δ E-DPDCH, setting the quantization power gain factor of the E-DPDCH required by the E-TFCI as a power gain factor of an E-DPDCH corresponding to the minimum quantized value of Δ E-DPDCH; otherwise, determining power gain factors of E-DPDCHs corresponding to various quantized values of Δ E-DPDCH in the selected quantization table of Δ E-DPDCH, determining power gain factors being less than or equal to the non-quantization power gain factor of the E-DPDCH, selecting a maximum value from the power gain factors less than or equal to the non-quantization power gain factor of the E-DPDCH, and setting the maximum value as the quantization power gain factor of the E-DPDCH required by the E-TFCI; and performing, by the UE, a sum of squares on quantization power gain factors of various E-DPDCHs required by the E-TFCI, and obtaining SG required by the E-TFCI which is equal to the sum of squares on power gain factors of various E-DPDCHs required by the E-TFCI.