Methods and apparatuses for receiving and transmitting indication information and a communication system. The apparatus for receiving indication information is applicable to a terminal equipment and includes a first processor, the first processor controlling the terminal equipment to perform the following operations: receiving a first configuration from a network device, the first configuration being used for configuring a conditional handover; receiving first downlink control information (DCI) from the network device in a first serving cell, the first DCI comprising first information and/or second information, wherein the first information is used to indicate dormancy or shutdown information related to A serving cell of the terminal equipment, and the second information is used to activate or deactivate cell discontinuous transmission or reception of B serving cell of the terminal equipment; where, A and B are positive integers; and performing an operation related to the conditional handover.