In the following description, terms for referring to network entities, terms referring to interfaces between network entities, and the like are illustratively used for the sake of convenience. Therefore, the disclosure is not limited by the terms as used below, and other terms referring to subjects having equivalent technical meanings may be used.
As used herein, a first communication network may include a new radio (NR) network (or 5G network) using a frequency in a high-frequency band (mmWave), and a second communication network may include a legacy network, such as a long-term evolution (LTE) network (or 4G network), a wideband code division multiplexing access (WCDMA) network, or the like. However, the first communication network and the second communication network are not limited to the above examples but may include networks according to different communication technologies. For example, wireless communication using the first communication network may have higher power consumption due to wireless communication than wireless communication using the second communication network.