1. POSSIBLE Projector Subunits (Subsystems) and Their Contents
Rick Landau , Dell, and Projector & Display Management BOF
2006/09/13

2. Proposal and Examples Only
Suggestions based on model that we discussed last week
Possible contents of the various subunits
Suggestive lists, not exhaustive
Long lists, need to decide later
What to include in the specs
What is mandatory versus optional
Leave room for expansion 2

3. Need Formal Definitions
We need to define subunits formally
What are its purpose and content?
How it is distinguished from other subunits?
Then define data items within subunits formally
Name, contents, semantics, usage
What shall we call it, in SNMP and Web contexts?
What does it contain? How do the agent and the user interpret its contents?
How do the agent and the user manipulate it?
Careful to distinguish setting versus state
(Probably not precise data syntax, which sometimes depends on the access protocol) 3

4. 4

5. Scope What's in, what's out
What functions, e.g., management rather than discovery
(Management of discovery protocols, e.g., disabling UPnP) 5

6. Subunits of a Projector
General information
Power states - RM
Localization
Interlocks - RBL
Display - HM & KA
Light Source - HM & KA
Video Quality - HM & KA
Optics - RBL
Thermal Management - ND
Fans
Filters
Temperature sensors
System controller - RR
Interfaces - RR
Transports Capabilities - RR
Interpreters & Codecs - RR
Console
Audio
Alerts
FRUs 6

7. General Information Identification Status Settings
Manufacturer, model, serial number
Status
Power state
Age, unit
Temperature, unit
Settings
Current language for console, SNMP, web server
Date, time
Power on/off
Current status values (may be here or in related groups)
E.g., video connector in use, video mode, audio source, etc. 7

8. Localization Language, region, character set
If this group is absent, assume English 8

9. Interlocks
Description
Status 9

10. Display Capabilities
Physical size (for display, not projector): Horizontal, Vertical, unit
(Note that Horizontal, Vertical, Width, and Height will be tricky to define, given that the device may be mounted in different positions.)
Resolution: W pixels, H pixels
Pixel aspect ratio
Color model, color depth, bits
Mounting options: landscape, portrait, upside down
Mounting settings: front/rear, floor/ceiling, landscape/portrait 10

11. Signal Sources
Video
Audio 11

12. Light Source Lamp type, technology, part number for replacement Status
Multiple lamps for some DLPs
Even backlighting is replaceable in LCDs
Replaceable modules of LEDs
Maybe multiple part numbers for a single item (e.g., different brightnesses)
Status
Age, unit, max age
On/off cycles
Power save mode settings
Blanking, standby, off (may need careful wording to avoid submarine patents)
Timeouts, enable/disable
No-signal image 12

13. Current Video State
Current source (here or in General group? Probably general)
Input color space: 4-2-2, 4-4-4
input sync polarity, H and V frequencies, HxV pixels, aspect ratio, Interlace/progressive, color system
Part of current profile
Current mode settings
Picture mode: PowerPoint, photo, video, cinema
Maintain aspect ratio? Stretch, crop, squeeze modes
Appearance
Color temperature
Brightness, contrast, gamma (more than one parameter, choice of curve from set, separate curves per color)
Optional to protect trade secrets
Color intensities
Saturation, sharpness, tint
White intensity
Noise reduction
H and V position, size
closed captioning,
dynamic color balance for colored targets (move to installation settings) 13

14. Saved Profiles per Source
All the same attributes as the current state, including
Mode
Others (on previous page)
Other features not stored in profile (move this)
Picture-in-picture, picture-by-picture settings 14

15. Optics Focus level Zoom level Keystoning H and V levels
Autofocus enable
Zoom level
Keystoning H and V levels
Autokeystone enable
(Again, Horizontal, Vertical, Up, Down, Left, Right need to be defined very carefully) 15

16. Thermal Management Group
Fans
Filters
Temperature sensors 16

17. Fans Name, location, part number for replacement, replacement cycle
Status
Speed setting, reading, maybe very coarse measurements
Maybe thresholds for speeds 17

18. Filters Name, location, part number for replacement
Age, unit, replacement cycle 18

19. Temperature and other thresholds
Multiple
Simple sensors or scalar settings 19

20. System controller Battery backup status Timer programmed events
Multiple controllers
Identification
Firmware versions
Upgradeable?
Controller status or errors, esp. for subcontrollers
History 20

21. Interfaces (Every connector, including hand remote control)
Enable/disable
Including power switch
Status 21

22. Transport Mechanisms XXXX
Description
Enable/disable
For protocols spoken on interfaces, e.g.,
IP parameters: addr, mask, broadcast, DNS, DHCP
Wireless parameters: IP, WEP, WPA, wi-fi radio
USB parameters
IR format
Serial line protocols
May need to include multiple entries in the network stack, e.g., IP and HTTP, MMS, RealMedia, etc.
(The combination of interface, channel, and video mode parameters needs a very general data model, not just linear lists of settings.) 22

23. Transport Capabilities
(examples only, not exhaustive)
Interfaces
physical interface, e.g., ethernet
enable/disable
Transports
ISO layer 2, e.g., IP, wireless
appropriate parameters
Session protocols
RealMedia, Windows Media, SIP, RTTP
HTTP, RDP
Payload formats (codecs)
MPEGs, JPG, PDLs
(Associations come later) 23

24. Interpreters, Codecs Interpreter types available
E.g., JPG, PDF
Packetized video
MPEG
Capabilites, interactions between content, transport, connector 24

25. Console Buttons Lights Physical display (e.g., LCD panel on device)
Description
Enable/disable functions for some buttons
Lights
Description, color capabilities
Physical display (e.g., LCD panel on device)
Contents
On-screen display
Localizable 25

26. Audio
Current source
Settings: mute, volume, tone, treble, bass, theater sound, noise reduction 26

27. Alerts Log of previous alert conditions Asynchronous delivery
Methods: traps, , SMS, pager
Enable/disable classes of alert conditions
Overflow management discipline: ring buffer, aging, etc. 27

28. FRUs (Field Replaceable Units)
Part numbers, and serial numbers if available, for field-replaceable units
Subunit ID
Description
Part number
Serial number
Customer replaceable? Training level maybe. 28

29. Additional Questions
Need a clear statements of intellectual property considerations
Example:
This specification includes no information on the subject of patents, trademarks, or licenses.
The presence of a management object does not imply a license to implement a related feature using any particular technology.
All vendors should submit PWG "Letter of Assurance" stating intellectual property claims and non-claims. 29

30. Next Steps
Describe use cases for management of projectors and displays
Define architectural subunits
Establish a template for specification of a data item
Begin to define data items, starting with easy ones
Examples of MIBs contributed by vendors 30

31. Next Meeting
Concall Monday, Sept 25 PM (US) / Tuesday, Sept 26 AM (Asia) 31

32. Use Cases
Basic asset inventory: what do I have installed, what spare parts do I need to stock? ND
Predict consumption of spares: how old are the lamps, filters, when will they need replacement? ND
Restore device to its default setup. RBL
Read the setup of the device to establish default. RBL
Restore device to profile appropriate to next usage, depends on customer. RM
Turn device on/off based on hours of operation. RR
Turn projector off every night to save power and lamp. RR
Predict usage of consumables based on environmental history, e.g., humidity, dust. HM
Does the firmware need updating?
Alert condition, send out person with right training and parts in hand. 32

33. Representational Considerations
Guideline: If a management application will make decisions based on a piece of data, then the data must be rigidly structured.
Integers instead of strings for numeric values
Enumerated values where possible
Need careful description of repeating groups of properties versus multi-valued properties 33