Station Operation Method and Apparatus in TV Whitespace

• US 20120314658A1
• Filed: 08/08/2012
• Published: 12/13/2012
• Est. Priority Date: 01/26/2010
• Status: Active Grant

• Current Assignee: Eunsun Kim, Yongho Seok
• Original Assignee: Eunsun Kim, Yongho Seok
• Inventors: Seok, Yongho, KIM, Eunsun
• Granted Patent: US 9,203,532 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: G06F 16/283 Multi-dimensional databases or data warehouses, e.g. MOLAP or ROLAP
• CPC Class Codes: H04H 20/22 Arrangements for broadcast of identical information via plural broadcast systems
• CPC Class Codes: H04H 20/42 Arrangements for resource management
• CPC Class Codes: H04H 60/92 for local area
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 8/20 Transfer of user or subscriber data
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

The present invention relates to a station (hereinafter, ‘STA’) operation method and apparatus in a TV whitespace. In a TVWS band, when an STA operating as an unlicensed device with permission to operate in an available channel not used by a licensed device needs to operate in the TVWS band by acquiring information on the available channel, the STA transmits an available channel information request message to a device having database information; receives, from the device having database information, an ACK message for the available channel information that includes (a) identification information on an available channel, (b) information on the maximum allowable power level in the available channel, and (c) information on valid time of the available channel; and transmits/receives a signal using the information of (a), (b) and (c), i.e., using the maximum allowable power level within the valid time in the available channel.

Claims

1-22. -22. (canceled)

23. A method for channel switch in a wireless communication system, the method comprising:

receiving, at a second station from a first station, a channel switch request frame comprising target channel information and transmit power control information for the target channel;

transmitting, from the second station to the first station, a channel switch response frame; and

transmitting, from the second station to the first station, a signal on the target channel,

wherein parameters in the transmit power control information are used for transmit power control calculation of the second station for the target channel.

24. The method according to claim 23, wherein the transmit power control information comprises maximum transmit power information for the target channel.

25. The method according to claim 23, wherein the transmitting the signal on the target channel is performed over a direct link between the first station and the second station.

26. The method according to claim 23, wherein the channel switch comprises a Tunneled Direct Link Setup (TDLS) channel switch.

27. The method according to claim 23, wherein the target channel comprises an off-channel that is not used by an Access Point (AP).

28. The method according to claim 23, wherein a maximum transmit power on the target channel is determined as a lowest transmit power value among different transmit power values.

29. A station supporting channel switch in a wireless communication system, the station comprising:

a transceiver configured to;

receive, at the station from another station, a channel switch request frame comprising target channel information and transmit power control information for the target channel; and

transmit, from the station to the another station, a channel switch response frame; and

a processor configured to control the transceiver to perform transmitting a signal on the target channel,

wherein parameters in the transmit power control information are used for transmit power control calculation of the second station for the target channel.

30. The station according to claim 29, wherein the transmit power control information comprises maximum transmit power information for the target channel.

31. The station according to claim 29, wherein the processor controls the transceiver to transmit the signal on the target channel over a direct link between the first station and the second station.

32. The station according to claim 29, wherein the channel switch comprises a Tunneled Direct Link Setup (TDLS) channel switch.

33. The station according to claim 29, wherein the target channel comprises an off-channel that is not used by an Access Point (AP).

34. The station according to claim 29, wherein a maximum transmit power on the target channel is determined as a lowest transmit power value among different transmit power values.