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

Patent metadata

Field	Value
Publication number	US-2016242183-A1
Application number	US-201615045764-A
Country	US
Kind code	A1
Filing date	Feb 17, 2016
Priority date	Feb 17, 2015
Publication date	Aug 18, 2016
Grant date	—

Abstract

Disclosed are an apparatus and a method for coexistence of heterogeneous services of a user terminal, which can enhance performance of a wireless communication network by simultaneously providing heterogeneous services such as an LTE-U service and a WiFi service to coexist without signal interference in unlicensed bands through effectively performing selection of a frequency band and selection of a transmission spectrum type in respective service modules of the user terminal.

First claim

What is claimed is:

1 . 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 to a base station relaying the first service in the unlicensed bands; and 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, wherein the first module and the second module provide the corresponding services by using channels determined by the base station and the AP, respectively, and 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.

2 . The wireless communication system of claim 1 , wherein the first service includes an LTE-U service and the second service includes a WiFi service.

3 . The wireless communication system of claim 1 , wherein the channel state information of the user terminal includes channel information, a received signal level, an intensity of the inter-service signal interference, or a signal-to-noise ratio, for the corresponding service.

4 . The wireless communication system of claim 1 , wherein the first module and the second module are embedded in the user terminal.

5 . The wireless communication system of claim 1 , wherein the first module and the second module are separated from each other to operate as different systems.

6 . 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.

7 . The wireless communication system of claim 6 , wherein the first service includes an LTE-U service and the second service includes a WiFi service.

8 . The wireless communication system of claim 6 , wherein the spectrum mask determiner determines a range of a spectrum mask type by calculating an interference signal level which the transmitted signal exerts to the received signal and selects one of a plurality of spectrum mask types in the range as the mask for the frequency spectrum of the transmitted signal.

9 . The wireless communication system of claim 6 , wherein the first module and the second module provide the corresponding services by using channels determined by the base station and the AP, respectively, and 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.

10 . 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.

11 . The wireless communication method of claim 10 , wherein the first service includes an LTE-U service and the second service includes a WiFi service.

12 . The wireless communication method of claim 10 , wherein the channel state information of the user terminal includes channel information, a received signal level, an intensity of the inter-service signal interference, or a signal-to-noise ratio, for the corresponding service.

13 . The wireless communication method of claim 10 , wherein the first module and the second module are embedded in the user terminal.

14 . The wireless communication method of claim 10 , wherein the first module and the second module are separated from each other to operate as different systems.

15 . 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.

16 . The wireless communication method of claim 15 , wherein the first service includes an LTE-U service and the second service includes a WiFi service.

17 . The wireless communication method of claim 15 , wherein in the determining of the mask, a range of a spectrum mask type is determined by calculating an interference signal level which the transmitted signal exerts to the received signal and one of a plurality of spectrum mask types in the range is selected as the mask for the frequency spectrum of the transmitted signal.

18 . The wireless communication method of claim 15 , wherein the first module and the second module provide the corresponding services by using channels determined by the base station and the AP, respectively and 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.

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Kang Kyu Min
• Park Seung Keun
• Park Jae Cheol
• Um Jung Sun
• Yoo Sung Jin
• Lee Dong Hun
• Jung Hoi Yoon
• Choi Su Na
• Hwang Sung Hyun

Classifications

• H04W72/54

  based on quality criteria · CPC title

• H04W72/082

  Electricity · mapped topic

• H04W72/0453 Primary

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title

• H04W72/1215 Primary

  for collaboration of different radio technologies · CPC title

• H04W16/14 Primary

  Spectrum sharing arrangements {between different networks} · CPC title