1. Notification of available channel list in TVWS
Month Year
doc.: IEEE yy/xxxxr0
Notification of available channel list in TVWS
Date: November, 02, 2010
Authors:
Name
Company
Address
Phone
Eunsun Kim
LG Electronics
Mobile Comm. Lab, LG R&D Complex 533, Hogye1, Dongan, Anyang, Korea
John Doe, Some Company

2. Introduction Legal Requirements
Notification method of available channel change

3. Legal Requirements Contact Verification Signal
An encoded signal broadcast from a fixed or Mode II device
Mode I device receive the contact verification signal from the fixed or Mode II that has provided a list of available channels
Encoded to ensure that the signal originates from the device that provided the list of available channels
Purpose
Ensuring that the Mode I is within the reception range of fixed or Mode II
Validating the list of available channels used by the Mode I

4. Legal Requirements List of available channels
A Mode I personal/portable TVBD may only transmit upon receiving a list of available channels from a fixed or Mode II TVBD
Fixed or Mode II device may provide a Mode I device with a list of available channels only after FCC ID verification is successful from the database

5. Legal Requirements List of available channels
At least once every 60 seconds, a Mode I device must either receive a contact verification signal from the Mode II or fixed device that provided its current list of available channels or contact a Mode II or fixed device to re-verify/re-establish channel availability.
A Mode I device must cease operation immediately if it does not receive a contact verification signal or is not able to re-establish a list of available channels through contact with a fixed or Mode II device on this schedule.

6. WSM Notification WSM Notification Hash
For the purpose of validating the available channel list
A unique value used to indicate an instance of a WSM Notification
Produced by the HMAC-SHA1-64 hash algorithm
Hashed with combined WSM and the identity of the STA that provided the WSM Information
Allows the STA to determine whether the available channel list is valid or not
Allows the STA to determine whether this is a new notification

7. WSM Notification WSM Request/Response
If a STA receives a new WSM Notification, it transmits WSM element of RLQP or WSM Request frame
If a STA receives a duplicated WSM Notification, it does not necessarily request a channel list
A STA should provide its Device ID (FCC ID), however it does not necessarily provide every time it request the WSM
Device ID is optionally present in WSM Request frame

8. WSM Notification WSM Notification element of RLQP
WSM Notification frame format
Element ID
Length
WSM Notification Hash
Octets: 1 8
Category
Public Action
Length
WSM Notification Hash
Octets: 1 8

9. White Space Map element
WSM Request/Response
WSM Request frame
WSM Response frame
Category
Public Action
Dialog Token
Device ID (optional)
Octets: 1
variable
Category
Public Action
Dialog Token
Status Code
White Space Map element
Octets: 1
Variable

10. WSM Notification Scenarios
Appendix
WSM Notification Scenarios

11. WSM Notification Scenario 1

12. WSM Notification Scenario 2
November 2009
Accelerate Contribution
WSM Notification Scenario 2
LG Electronics, Inc.