Method and apparatus of converting TV channels into WLAN channels in a wireless local area network system

• US 9,014,122 B2
• Filed: 02/09/2011
• Issued: 04/21/2015
• Est. Priority Date: 07/26/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Jihyun, Kim, Byoung Hoon, Kim, Eunsun, Seok, Yongho
• Primary Examiner(s): Phillips, Hassan
• Assistant Examiner(s): GEORGE, AYANAH S
• Application Number:
  US13/812,217
• Publication Number:
  US 20140307634A1
• Time in Patent Office: 1,532 Days
• Field of Search: None
• US Class Current: 370/329
• CPC Class Codes: H04L 27/0006 Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio for spectrum sharing between different networks H04W16/14
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

A method of converting TV channels into WLAN channels in a wireless local area network system (WLAN) is disclosed. A method of converting TV channels into WLAN channels at an apparatus comprising receiving WSM including a list of available TV channels and finding out a center frequency of each of first WLAN channels which exist on frequency area of the available TV channels using TV channel bandwidth, WLAN channel bandwidth and a starting frequency of each of the available TV channels, wherein the TV channel bandwidth and the WLAN channel bandwidth are predetermined.

Claims

1. A method for a device for a wireless local area network (WLAN) system to operate in a whitespace spectrum, the method comprising:

obtaining available channel information from another device;

scanning for access points based on the available channel information; and

determining a center frequency of an operating channel in the WLAN system, wherein the operating channel is determined based on the scanning,

wherein the center frequency of the operating channel is determined according to an equation;

C=S+(B*f(bw))+(0.5*B)

where C is the center frequency of the operating channel,

S is a starting frequency,

B is a whitespace channel bandwidth,

bw is the operating channel bandwidth,

f(bw) is a value determined according to the operating channel bandwidth.

2. The method according to claim 1, further comprising:

obtaining information including an operating channel bandwidth in the WLAN system.

3. The method according to claim 1, wherein the operating channel spans a consecutive plurality of whitespace channels.

4. The method according to claim 1, wherein f(bw) has a positive integer value.

5. The method according to claim 1, wherein B is 6 MHz, 7 MHz, or 8 MHz.

6. The method according to claim 1, wherein the whitespace is a TV whitespace.

7. The method according to claim 1, wherein a White Space Map (WSM) indicates the available channel information.

8. The method according to claim 7, wherein the WSM includes a list of available channels and maximum allowed transmission power information of the available channels.

9. The method according to claim 1, wherein the device is TV band device.

10. A device for a wireless local area network (WLAN) system to operate in a whitespace spectrum, the device comprising:

a transceiver; and

a processor,

wherein the processor is configured to;

obtain available channel information from another device;

scan for access points based on the available channel information;

determine a center frequency of an operating channel in the WLAN system, wherein the operating channel is determined based on the scanning,

wherein the center frequency of the operating channel is determined according to an equation;

C=S+(B*f(bw))+(0.5*B)

where C is the center frequency of the operating channel,

S is a starting frequency,

B is a whitespace channel bandwidth,

bw is the operating channel bandwidth,

f(bw) is a value determined according to the operating channel bandwidth.