Method and device for determining timing advance group

The embodiment of the invention provides a method, equipment and a system for determining a timing advance (TA) group, which relate to the field of communication. The technical scheme is that: an evolved Node B (eNB) adds a carrier component (CC) to user equipment (UE); the TA group to which the added CC belongs is determined according to acquired TA group information or a preset rule, wherein the TA group is the set of the CCs which can share one TA; and identifier information for identifying the TA group is transmitted to the UE. The embodiment of the invention is used for determining the TA group when the eNB adds the CC to the UE.