1. 802.19.1 Logical Entities Date: 2010-09-15 Authors: September 2010
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Hyunduk Kang, et al, ETRI

2. Contents Introduction Coexistence Manager Coexistence Enabler
September 2010
Contents
Introduction
Coexistence Manager
Coexistence Enabler
Coexistence Discovery and Information Server
Hyunduk Kang, et al, ETRI

3. September 2010
Introduction (1/4)
system architecture consists of three logical entities and six logical interfaces
system architecture
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4. Introduction (2/4) Coexistence Manager is responsible for
September 2010
Introduction (2/4)
Coexistence Manager is responsible for
coexistence decision making
generating and providing corresponding coexistence requests/commands and control information to coexistence enablers
discovering/communicating with other neighbor coexistence managers to collaborate with them
assisting network operators in management related to TVWS coexistence
and etc.
Hyunduk Kang, et al, ETRI

5. Introduction (3/4) Coexistence Enabler is responsible for
September 2010
Introduction (3/4)
Coexistence Enabler is responsible for
enabling communication between coexistence manager and TVBD network or device
requesting/obtaining information required for coexistence from TVBD network or device
translating reconfiguration requests/commands and control information received from the coexistence manager into TVBD-specific reconfiguration requests/commands
and etc.
Hyunduk Kang, et al, ETRI

6. September 2010
Introduction (4/4)
Coexistence Discover and Information Server is responsible for
discovering other coexistence managers, opening interfaces between coexistence managers to provide coexistence related information exchange among coexistence managers
collecting/aggregating coexistence related information from multiple coexistence managers, communicating with the TVWS database to obtain information on incumbents
and etc.
Hyunduk Kang, et al, ETRI

7. CM: Key functions Maintaining channel availability information
September 2010
CM: Key functions
Maintaining channel availability information
Channel classification and selection
Association control for CE
Channel management
Discovering other CMs
Maintaining context information required for coexistence among CMs
Assisting network operators in management related to TVWS coexistence
Accessing the TVWS database
Coexistence decision making
Hyunduk Kang, et al, ETRI

8. CM: Maintaining channel availability information (1/2)
September 2010
CM: Maintaining channel availability information (1/2)
CM shall
maintain the status of the TV channels available for TVBD operation at its location according to the policies and rules established by regulation.
obtain information on the TV channel status with respect to the presence of incumbents and other neighbor CMs in its location
use this information as input for its decision for channel selection, channel management, coexistence decision making, and etc.
Hyunduk Kang, et al, ETRI

9. CM: Maintaining channel availability information (2/2)
September 2010
CM: Maintaining channel availability information (2/2)
To maintain the status of the channels available for TVBD operation, the CM shall be able to collect and fuse information from the following sources:
TVWS database
CDIS
Neighbor CMs
Spectrum sensing report from CE
The channel availability information shall be
defined during the initialization of CM
periodically updated during the operation of CM
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10. CM: Channel classification and selection (1/13)
September 2010
CM: Channel classification and selection (1/13)
In order to start operation of TVBD networks or devices, CM shall select and assign a proper operating channel for TVBD to mitigate coexistence problems among TVBD networks or devices.
A proper operating channel shall be selected from one of allowed channels.
Allowed channels that may be used by TVBD networks or devices at their location shall be given by TVWS database.
Hyunduk Kang, et al, ETRI

11. CM: Channel classification and selection (2/13)
September 2010
CM: Channel classification and selection (2/13)
Status of given allowed channels will be dynamically changed based on incumbent activities, activities of other TVBD networks or devices, relocation of TVBDs, etc.
To facilitate coexistence between TVBD networks or devices, CM shall know status of TV channels at a given location such as:
Which channel is available for TVBDs or networks
Which channel is disallowed by regulation, or by the request of incumbents
Which channel should be protected due to current incumbent activity
Which channel should be restricted with limitations in order to use by TVBDs or networks
Which channel is already being used by other TVBDs or networks
Etc.
Hyunduk Kang, et al, ETRI

12. CM: Channel classification and selection (3/13)
September 2010
CM: Channel classification and selection (3/13)
TV Channels for logical entities are classified as the following 8 channels;
Disallowed channels
Allowed channels
Available channels
Protected channels
Restricted channels
Unclassified channels
Operating channels
Coexistent channels
Hyunduk Kang, et al, ETRI

13. CM: Channel classification and selection (4/13)
September 2010
CM: Channel classification and selection (4/13)
Disallowed set
A set of channels disallowed for any TVBDs or networks by regulation, or by the request of incumbents
Should be provided by TVWS database and will be updated if necessary
Allowed set
A set of channels allowed for TVBDs or networks
Slide 13
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14. CM: Channel classification and selection (5/13)
September 2010
CM: Channel classification and selection (5/13)
Available set
A set of free channels available for TVBDs or networks
Restricted set
A set of channels restricted to use with limitations due to regulation
Can be used by TVBDs or networks under limited conditions predefined by regulation
Protected set
A set of channels to be protected due to incumbent activity
Can NOT be used by any TVBDs or networks
Unclassified set
A set of channels has not been classified as one of listed above three sets
Slide 14
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15. CM: Channel classification and selection (6/13)
September 2010
CM: Channel classification and selection (6/13)
Operating set
A set of operating channels being used by one TVBD or network
Can be selected from available set or restricted set
If each TVBD or network has its own operating channel, spectrum etiquette with FDM (frequency division multiplexing) is achievable.
Coexistent set
A set of channels being shared by two or more TVBD networks
If two or more TVBDs or networks compete for the same channel, spectrum etiquette with FDM is NOT achievable.
Slide 15
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16. CM: Channel classification and selection (7/13)
September 2010
CM: Channel classification and selection (7/13)
A hierarchical structure of TV channels
Allowed channels informed from TVWS database are further classified into the following categories:
Available channels
Restricted channels
Protected channels
Unclassified channels
Hyunduk Kang, et al, ETRI

17. CM: Channel classification and selection (8/13)
September 2010
CM: Channel classification and selection (8/13)
Venn diagram of TV Channels
Disallowed set
A subset of a TV channel set
A complementary set of the allowed set
Allowed set
A complementary set of the disallowed set
Available/Restricted/Protected/Unclassified set
A subset of the allowed set
Two different channel sets are a complementary set each other
Operating set
A subset of the available set or the restricted set or union of both
A subset of a complementary set of the coexistent set
Coexistent set
A subset of the operating set
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Hyunduk Kang, ETRI

18. CM: Channel classification and selection (9/13)
September 2010
CM: Channel classification and selection (9/13)
Flowchart of channel selection
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19. CM: Channel classification and selection (10/13)
July 2010
CM: Channel classification and selection (10/13)
Channel Set Transition Diagram
Slide 19
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20. CM: Channel classification and selection (11/13)
September 2009
CM: Channel classification and selection (11/13)
Channel Set Transition Events
Event (1): If the channel already being used by one TVWS system is assigned to other TVWS system(s) so that two or more TVWS systems use the same channel as an operating channel
Event (2): If the channel is released by other TVWS systems so that the channel is being used by only one TVWS system
Event (3): If the channel is released and not be used by any TVWS systems due to the completion of its usage
Event (4): If the channel is assigned to one TVWS system and not shared by any other TVWS systems
Event (5): If the channel is assigned to two or more TVWS systems at the same time
Event (6): If an incumbent activity has been informed on the channel
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21. CM: Channel classification and selection (12/13)
September 2009
CM: Channel classification and selection (12/13)
Channel Set Transition Events
Event (7): If the channel temporarily satisfies the condition that requires its usage with limitations due to regulation
E.g., in the U.S. if an incumbent activity has been informed on the channel (F), the first adjacent channel (F±1) can be used by only a portable/personal TVBD with limited transmit power, say 100mW EIRP
Event (8): If the channel is released by an incumbent due to the completion of its usage
Event (9): If the channel is exempted from its temporary restriction and free to use without limitation
E.g., in the U.S. if the channel is released by the incumbent on the channel (F) due to the completion of its usage, the first adjacent channel (F±1) can be used by any TVBDs and networks
Event (10): If the channel is not occupied by an incumbent or any TVWS systems
Event (11): If the channel is not classified or updated within the predefined time expiration
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22. CM: Channel classification and selection (13/13)
September 2010
CM: Channel classification and selection (13/13)
Channel Set Transition Matrix
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Hyunduk Kang, ETRI

23. CE: Key functions Accessing device management entity (DME) of TVBD
September 2010
CE: Key functions
Accessing device management entity (DME) of TVBD
Accessing CM
Relaying/Translating context and reconfiguration messages between CM and TVBD
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24. CDIS: Key functions Maintaining channel availability information
September 2010
CDIS: Key functions
Maintaining channel availability information
Channel classification
Association control for CM
Supporting discovery of CMs
Maintaining context information required for coexistence among CMs
Accessing the TVWS database
Hyunduk Kang, et al, ETRI