Apparatus and method for coexistence of lte-u and wifi services in unlicensed bands

A wireless communication system for coexistence of heterogeneous services in unlicensed bands, the wireless communication system comprising:

• a first module providing a first service to a user terminal through wireless communication with a base station relaying the first service in the unlicensed bands;
• a second module providing a second service to the user terminal through wireless communication with an AP relaying the second service in the unlicensed bands;
• and
• a spectrum mask determiner determining a mask for a frequency spectrum of a transmitted signal of the unlicensed band for the corresponding services so as to minimize inter-service signal interference from a received signal in the unlicensed band, with respect to the respective services in the first module and the second module.

A wireless communication method for coexistence of heterogeneous services in unlicensed bands in a wireless communication system, the wireless communication method comprising:

• providing a first service to a user terminal by using a channel determined by a base station relaying the first service in the unlicensed bands by using a first module;
• and
• providing a second service to the user terminal by using a channel determined by an AP relaying the second service in the unlicensed bands by using a second module,
• wherein the base station and the AP divide and manage the unlicensed bands into a plurality of subband groups and determine the channels in the subband group for the corresponding service so as to minimize inter-service signal interference by referring to channel state information of the user terminal.

A wireless communication method for coexistence of heterogeneous services in unlicensed bands in a wireless communication system, the wireless communication method comprising:

• providing a first service to a user terminal through wireless communication with a base station relaying the first service in the unlicensed bands by using a first module;
• providing a second service to the user terminal through wireless communication with an AP relaying the second service in the unlicensed bands by using a second module;
• and
• determining a mask for a frequency spectrum of a transmitted signal of the unlicensed band for the corresponding services so as to minimize inter-service signal interference from a received signal in the unlicensed band, with respect to the respective services in the first module and the second module.