A method implemented at a location server is proposed. The method comprises: deciding inter-frequency measurement information for positioning a user equipment, UE, wherein the inter-frequency measurement information comprises at least one frequency other than a frequency of a serving cell of the UE; sending a first measurement request containing the inter-frequency measurement information to an access node of the serving cell; receiving a first measurement result from the access node; and determining a position of the UE based on the measurement result.