Throughout the specification, a network may include, for example, a wireless Internet such as wireless fidelity (WiFi), mobile Internet such as wireless broadband Internet (WiBro) or world interoperability for microwave access (WiMax), 2G mobile communication network such as global system for mobile communication (GSM) or code division multiple access (CDMA), 3G mobile communication network such as wideband code division multiple access (WCDMA) or CDMA2000, 3.5G mobile communication network such as high speed downlink packet access (HSDPA) or high speed uplink packet access (HSDPA), 4G mobile communication network such as long term evolution (LTE) network or LTE-Advanced network, 5G mobile communication network, or the like.

Throughout the specification, a terminal may refer to a mobile station, mobile terminal, subscriber station, portable subscriber station, user equipment, an access terminal, or the like, and may include all or a part of functions such as the terminal, mobile station, mobile terminal, subscriber station, mobile subscriber station, user equipment, access terminal, or the like.

Here, a desktop computer, a laptop computer, tablet PC, wireless phone, mobile phone, smart phone, smart watch, smart glass, e-book reader, portable multimedia player (PMP), portable game console, navigation device, digital camera, digital multimedia broadcasting (DMB) player, digital audio recorder, digital audio player, digital picture recorder, digital picture player, digital video recorder, digital video player, or the like may be used as the terminal.