Discovery and control protocol for intelligent displays

• US 20040255029A1
• Filed: 06/16/2003
• Published: 12/16/2004
• Est. Priority Date: 06/16/2003
• Status: Abandoned Application

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Manion, Todd R., Donner, Robert D.
• Application Number:
  US10/463,826
• Publication Number:
  US 20040255029A1
• Time in Patent Office: Days
• US Class Current: 709/227
• CPC Class Codes: H04L 12/2803 Home automation networks
• CPC Class Codes: H04L 12/2809 indicating that an appliance service is present in a home automation network monitoring functionality H04L43/0817; discovery or management thereof, e.g. service location protocol [SLP] or web services, H04L67/51
• CPC Class Codes: H04L 12/282 based on user interaction within the home receiver circuitry for displaying additional information being controlled by a remote control apparatus H04N21/42204
• CPC Class Codes: H04L 2012/2841 Wireless
• CPC Class Codes: H04L 2012/2849 Audio/video appliances
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/04 specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 67/51 Discovery or management thereof, e.g. service location protocol [SLP] or web services
• CPC Class Codes: H04L 67/75 Indicating network or usage conditions on the user display
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]

Abstract

During seminars, speakers often need to interrupt their presentations in order to switch between laptops that plug into a projector. Participants move around the room in order to accommodate a cable tethered to a projector. Instead, a control point discovers an intelligent display over a network. In one example, upon a user selecting an intelligent display connection icon, the control point establishes a connection with the intelligent display, and sends content to be displayed at the intelligent display. A Device Control Protocol (DCP) is defined according to the Universal Plug and Play (UPNP) protocol. UPnP is used to discover and control intelligent displays, over a wired or wireless network. Methods in a service description are used by control points to connect with, control, and determine the status of an intelligent display. Other defined methods change the state or settings of the intelligent display.

Claims

1. A computer readable storage medium containing a schema data structure used to form XML strings or verify XML strings used in communicating service requests, the schema data structure comprising:

a connection action identifier with an argument list identifier with a connection string argument identifier with a string input value identifier, a connection name argument identifier with a string input value identifier, and a session token argument identifier with an integer output value identifier;

a disconnect action identifier with a session token argument identifier with an integer input value identifier;

a get display capabilities action identifier with a display capabilities argument identifier with a string output value identifier; and

a get projector state action identifier with a projector state argument identifier with an integer output value identifier.

2. The computer-readable medium of claim 1 further comprising:

a get projector name action identifier with a projector name argument identifier with a string output value identifier; and

a get connection list identifier action identifier with a connection list identifier argument identifier with a string output value identifier.

3. The computer-readable medium of claim 2 further comprising:

a set current connection action identifier with an argument list identifier with a session token argument identifier with an integer input value identifier, and a connection name argument identifier with a string input value identifier; and

a get current connection action identifier with a current name argument identifier with a string output value identifier.

4. The computer-readable medium of claim 3, further comprising:

a get display settings action identifier with an argument list identifier with a connection name argument identifier with a string output value identifier, and a display settings argument identifier with a string output value identifier; and

a set display settings action identifier with an argument list identifier with a session token argument identifier with an integer input value identifier, and a display settings argument identifier with a string output value identifier; and

a hide connection action identifier with a session token argument identifier with an integer input value identifier.

5. The computer-readable medium of claim 1 wherein the data structure is used by a control point to form XML strings to control an intelligent display.

6. The computer-readable medium of claim 1 wherein the data structure is used by a control point to form XML strings to control the display of another control point.

7. The computer-readable medium of claim 1 wherein the data structure is used by a control point to form XML strings to control the display of plural other control points.

8. The computer-readable medium of claim 7 wherein the data structure is transmitted from an intelligent display to a control point, upon receiving a request from the control point for a service description.

9. The computer-readable medium of claim 7 wherein the data structure is used by an intelligent display to verify that a received XML string is a well formed service request.

10. A computerized method comprising:

requesting a service description;

receiving the service description;

storing the service description;

creating a service request according to a format of the service description; and

sending the service request;

wherein the service description comprises the following;

<

?xml version=“

1.0”

?>

<

scpd xmlns=“

urn;

schemas-upnp-org;

service-1-0”

>

<

specVersion>

<

major>

1<

/major>

<

minor>

0<

/minor>

<

/specVersion>

<

actionList>

<

action>

<

name>

Connect<

/name>

<

argumentList>

<

argument>

<

name>

ConnectionString<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

A_String<

/relatedStateVariable>

<

/argument>

<

argument>

<

name>

ConnectionName<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

A_String<

/relatedStateVariable>

<

/argument>

<

argument>

<

name>

SessionToken<

/name>

<

direction>

out<

/direction>

<

relatedStateVariable>

A_Int<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

<

action>

<

name>

Disconnect<

/name>

<

argumentList>

<

argument>

<

name>

SessionToken<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

A_Int<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

<

action>

<

name>

GetDisplayCapabilities<

/name>

<

argumentList>

<

argument>

<

name>

DisplayCapabilities<

/name>

<

direction>

out<

/direction>

<

relatedStateVariable>

DisplayCapabilities<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

<

action>

<

name>

GetProjectorState<

/name>

<

argumentList>

<

argument>

<

name>

ProjectorState<

/name>

<

direction>

out<

/direction>

<

relatedStateVariable>

ProjectorState<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

<

action>

<

name>

GetProjectorName<

/name>

<

argumentList>

<

argument>

<

name>

ProjectorName<

/name>

<

direction>

out<

/direction>

<

relatedStateVariable>

ProjectorName<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

<

action>

<

name>

GetConnectionList<

/name>

<

argumentList>

<

argument>

<

name>

ConnectionList<

/name>

<

direction>

out<

/direction>

<

relatedStateVariable>

ConnectionList<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

<

action>

<

name>

SetCurrentConnection<

/name>

<

argumentList>

<

argument>

<

name>

SessionToken<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

A_Int<

/relatedStateVariable>

<

/argument>

<

argument>

<

name>

ConnectionName<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

A_String<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

<

action>

<

name>

GetCurrentConnection<

/name>

<

argumentList>

<

argument>

<

name>

CurrentName<

/name>

<

direction>

out<

/direction>

<

relatedStateVariable>

CurrentConnection<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

<

action>

<

name>

GetDisplaySettings<

/name>

<

argumentList>

<

argument>

<

name>

ConnectionName<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

A_String<

/relatedStateVariable>

<

/argument>

<

argument>

<

name>

DisplaySettings<

/name>

<

direction>

out<

/direction>

<

relatedStateVariable>

A_String<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

<

action>

<

name>

SetDisplaySettings<

/name>

<

argumentList>

<

argument>

<

name>

SessionToken<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

A_Int<

/relatedStateVariable>

<

/argument>

<

argument>

<

name>

DisplaySettings<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

A_String<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

<

action>

<

name>

HideConnection<

/name>

<

argumentList>

<

argument>

<

name>

SessionToken<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

A_Int<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

<

/actionList>

<

serviceStateTable>

<

stateVariable sendEvents=“

no”

>

<

name>

A_String<

/name>

<

dataType>

string<

/dataType>

<

/stateVariable>

<

stateVariable sendEvents=“

no”

>

<

name>

A_Int<

/name>

<

dataType>

int<

/dataType>

<

/stateVariable>

<

stateVariable sendEvents=“

yes”

>

<

name>

ConnectionList<

/name>

<

dataType>

string<

/dataType>

<

/stateVariable>

<

stateVariable sendEvents=“

no”

>

<

name>

DisplayCapabilities<

/name>

<

dataType>

string<

/dataType>

<

/stateVariable>

<

stateVariable sendEvents=“

yes”

>

<

name>

CurrentConnection<

/name>

<

dataType>

string<

/dataType>

<

/stateVariable>

<

stateVariable sendEvents=“

yes”

>

<

name>

ProjectorState<

/name>

<

dataType>

int<

/dataType>

<

/stateVariable>

<

stateVariable sendEvents=“

no”

>

<

name>

ProjectorName<

/name>

<

dataType>

string<

/dataType>

<

/stateVariable>

<

/serviceStateTable>

<

/scpd>

.

11. The computerized method of claim 10 wherein a response to the sent service request is received as an XML string with instance data in place of below data fields, the XML string comprising:

12. The computerized method of claim 10 wherein a response to the sent service request is received as an XML string with instance data in place of below data fields, the XML string comprising:

13. The computerized method of claim 10 wherein the method is being performed by a laptop computer over a wireless network in order to control an intelligent display.

14. The computerized method of claim 13 wherein the intelligent display is a laptop.

15. The computerized method of claim 13 wherein the intelligent display is a projector.

16. An intelligent display communicating over a wireless network, the communications comprising:

an XML service request with instance data replacing the following data fields, the XML service request comprising;

<

action>

<

name>

Connect<

/name>

<

argumentList>

<

argument>

<

name>

ConnectionString<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

datafield<

/relatedStateVariable>

<

/argument>

<

argument>

<

name>

ConnectionName<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

datafield<

/relatedStateVariable>

<

/argument>

<

argument>

<

name>

SessionToken<

/name>

<

direction>

out<

/direction>

<

relatedStateVariable>

datafield<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

;

an XML service request with instance data replacing the following data field, the XML service request comprising;

<

action>

<

name>

Disconnect<

/name>

<

argumentList>

<

argument>

<

name>

SessionToken<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

datafield<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

;

an XML service request with instance data replacing the following data field, the XML service request comprising;

<

action>

<

name>

GetDisplayCapabilities<

/name>

<

argumentList>

<

argument>

<

name>

DisplayCapabilities<

/name>

<

direction>

out<

/direction>

<

relatedStateVariable>

data field<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

; and

an XML service request with instance data replacing the following data field, the XML service request comprising;

<

action>

<

name>

GetProjectorState<

/name>

<

argumentList>

<

argument>

<

name>

ProjectorState<

/name>

<

direction>

out<

/direction>

<

relatedStateVariable>

datafield<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

.

17. The intelligent display of claim 16, wherein the communications are further comprising:

an XML service request with instance data replacing the following data field, the XML service request comprising;

<

action>

<

name>

GetProjectorName<

/name>

<

argumentList>

<

argument>

<

name>

ProjectorName<

/name>

<

direction>

out<

/direction>

<

relatedStateVariable>

datafield<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

.

18. The intelligent display of claim 17, wherein the communications are further comprising:

an XML service request with instance data replacing the following data field, the XML service request comprising;

<

action>

<

name>

GetConnectionList<

/name>

<

argumentList>

<

argument>

<

name>

ConnectionList<

/name>

<

direction>

out<

/direction>

<

relatedStateVariable>

datafield<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

.

19. The intelligent display of claim 17, wherein the communications are further comprising:

an XML service request with instance data replacing the following data fields, the XML service request comprising;

<

action>

<

name>

SetCurrentConnection<

/name>

<

argumentList>

<

argument>

<

name>

SessionToken<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

datafield<

/relatedStateVariable>

<

/argument>

<

argument>

<

name>

ConnectionName<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

datafield<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

.

20. The intelligent display of claim 17, wherein the communications are further comprising:

an XML service request with instance data replacing the following data field, the XML service request comprising;

<

action>

<

name>

GetCurrentConnection<

/name>

<

argumentList>

<

argument>

<

name>

CurrentName<

/name>

<

direction>

out<

/direction>

<

relatedStateVariable>

data field<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

.

21. The intelligent display of claim 17, wherein the communications are further comprising:

an XML service request with instance data replacing the following data fields, the XML service request comprising;

<

action>

<

name>

GetDisplaySettings<

/name>

<

argumentList>

<

argument>

<

name>

ConnectionName<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

datafield<

/relatedStateVariable>

<

/argument>

<

argument>

<

name>

DisplaySettings<

/name>

<

direction>

out<

/direction>

<

relatedStateVariable>

datafield<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

.

22. The intelligent display of claim 17, wherein the communications are further comprising:

an XML service request with instance data replacing the following data fields, the XML service request comprising;

<

action>

<

name>

SetDisplaySettings<

/name>

<

argumentList>

<

argument>

<

name>

SessionToken<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

datafield<

/relatedStateVariable>

<

/argument>

<

argument>

<

name>

DisplaySettings<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

datafield<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

.

23. The intelligent display of claim 17, wherein the communications are further comprising:

an XML service request with instance data replacing the following data field, the XML service request comprising;

<

action>

<

name>

HideConnection<

/name>

<

argumentList>

<

argument>

<

name>

SessionToken<

/name>

<

direction>

in<

/direction>

<

relatedStateVariable>

datafield<

/relatedStateVariable>

<

/argument>

<

/argumentList>

<

/action>

.