Method and apparatus for dynamic station enablement procedure

• US 8,588,160 B2
• Filed: 03/11/2011
• Issued: 11/19/2013
• Est. Priority Date: 03/12/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Eun Sun, Seok, Yong Ho
• Primary Examiner(s): Pham, Chi
• Assistant Examiner(s): Mohebbi, Kouroush
• Application Number:
  US13/046,048
• Publication Number:
  US 20110243078A1
• Time in Patent Office: 984 Days
• Field of Search: None
• US Class Current: 370/329
• CPC Class Codes: H04L 5/0085 when channel conditions change
• 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 72/27 between access points
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A method and an apparatus for an access point (AP) station to operate as a first type dependent station within a white space in a regulatory domain where a licensed device and an unlicensed device are permitted to operate together are disclosed. For a method of an access point (AP) station to operate as a first type dependent station within a white space in a regulatory domain where a licensed device and an unlicensed device are permitted to operate together, the method comprising: transmitting a White Space Map (WSM) comprising a list of available channels and a list of maximum allowed transmission powers of the available channels within a beacon frame in every beacon transmission instances with a predetermined transmission interval, wherein the transmission of the WSM is for at least one second type dependent station; receiving, from an enabling station having an authority for a permission of an operation of the first type dependent station and the second type dependent station, an updated White Space Map (WSM); operating only within the available channels identified by the updated WSM; and transmitting the updated WSM in a next beacon transmission instance when the WSM is supposed to be transmitted within the beacon frame.

Claims

1. A method for a dependent station to operate within a white space, the method comprising:

receiving, from an enabling station, a White Space Map (WSM) comprising a list of available channels and a list of maximum allowed transmission powers of the available channels;

operating only within the available channels identified by the WSM; and

receiving, from the enabling station, an updated WSM in a frame, wherein the frame is transmitted by the enabling station when the enabling station retrieves updated available channel information,

wherein the enabling station has a database access capability, and the dependent station lacks database access capability, wherein the enabling station retrieves the available channel information from the database, and the dependent station retrieves the available channel information from the enabling station, and wherein the available channel information indicates frequencies permitted by the database,

wherein the dependent station moves channels for operation if the dependent station is operating on a channel which becomes unavailable by the updated WSM,

wherein the updated WSM is used for the dependent station to determine a white space operation state of the dependent station, and

wherein, if the dependent station fails to retrieve the updated WSM within a redetermined time, the dependent station changes the white space operation state to unenabled and stops transmitting within the white space.

2. The method of claim 1, further comprising:

transmitting, from the dependent station, a request frame; and

receiving a response frame in response to the request frame comprising the WSM from the enabling station.

3. The method of claim 1, wherein the frame is a WSM announcement frame.

4. A dependent station apparatus operating within a white space, the apparatus comprising:

a transceiver configured to receive, from an enabling station, a White Space Map (WSM) comprising a list of available channels and a list of maximum allowed transmission powers of the available channels; and

a processor configured to operate only within the available channels identified by the WSM,

wherein the processor controls the transceiver to receive, from the enabling station, an updated WSM in a frame, wherein the frame is transmitted by the enabling station when the enabling station retrieves updated available channel information,

wherein the enabling station has a database access capability, and the dependent station lacks database access capability, wherein the enabling station retrieves the available channel information from the database, and the dependent station retrieves the available channel information from the enabling station, and wherein the available channel information indicates frequencies permitted by the database,

wherein the dependent station moves channels for operation if the dependent station is operating on a channel which becomes unavailable by the updated WSM,

wherein the updated WSM is used for the dependent station to determine a white space operation state of the dependent station, and

wherein, if the dependent station fails to retrieve the updated WSM within a redetermined time, the dependent station changes the white space operation state to unenabled and stops transmitting within the white space.

5. The apparatus of claim 4, wherein the transceiver is further configured transmit, from the dependent station, a request frame, and to receive a response frame in response to the request frame comprising the WSM from the enabling station.

6. The apparatus of claim 4, wherein the apparatus become unenabled, if the apparatus does not retrieve an updated WSM.

7. The apparatus of claim 4, wherein the frame is a WSM announcement frame.