Span out load balancing model

• US 9,742,876 B2
• Filed: 02/08/2016
• Issued: 08/22/2017
• Est. Priority Date: 06/22/2011
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Inventors: Das, Archan, Kannan, Gopikrishna, Balachandran, Ravi K., Bucha, Vikash
• Primary Examiner(s): Kim, Jung
• Assistant Examiner(s): Wilcox, James J
• Application Number:
  US15/018,798
• Publication Number:
  US 20160156745A1
• Time in Patent Office: 561 Days
• CPC Class Codes: G06F 3/1454 involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
• CPC Class Codes: G06F 9/452 Remote windowing, e.g. X-Window System, desktop virtualisation protocols for virtual reality H04L67/131
• CPC Class Codes: H04L 2101/663 Transport layer addresses, e.g. aspects of transmission control protocol [TCP] or user datagram protocol [UDP] ports
• CPC Class Codes: H04L 67/01 Protocols
• CPC Class Codes: H04L 67/08 specially adapted for terminal emulation, e.g. Telnet
• CPC Class Codes: H04L 67/141 Setup of application sessions admission control or resource allocation in data switching networks H04L47/70
• CPC Class Codes: H04L 69/164 Adaptation or special uses of UDP protocol
• CPC Class Codes: H04L 9/3247 involving digital signatures

Abstract

This document describes techniques for transporting at least a portion of the data for a remote presentation session via datagrams. In particular, a span-out model is described whereby a remote presentation session can be associated with multiple channels and each channel can be routed through a different gateway computer system. As such, a connectionless oriented channel for a client may be routed through a first gateway computer system and a connection oriented channel for the client may be routed through a second gateway computer system. In addition to the foregoing, other techniques are described in the claims, the attached drawings, and the description.

Claims

1. A system, comprising:

a processor; and

a memory coupled to the processor, the memory including instructions that upon execution cause the system at least to;

receive, by a first gateway, a connection request from a client device, wherein the connection request includes a resource network address for a remote presentation session and a connection identifier identifying a connection oriented channel established on a second gateway between the remote presentation session and the client device;

associate a network address for the first gateway with the connection identifier so as to establish a first connectionless channel; and

route a first datagram for the remote presentation session to the client device over the first connectionless channel.

2. The system of claim 1, the memory further comprising instructions that upon execution cause the system at least to:

associate a network address for a third gateway with the connection identifier; and

establish a second connectionless channel.

3. The system of claim 2, the memory further comprising instructions that upon execution cause the system at least to:

route a second datagram for the remote presentation session to the client device over the second connectionless channel, the second datagram including second data indicative of a graphical user interface.

4. The system of claim 1, wherein the first datagram comprises first data indicative of audio.

5. The system of claim 1, the memory further comprising instructions that upon execution cause the system at least to:

extract the connection request from an encrypted package addressed from the client device, the encrypted package including the connection identifier and the resource network address for a remote presentation session in a payload.

6. The system of claim 1, the memory further comprising instructions that upon execution cause the system at least to:

instantiate a connection object, the connection object associated with the resource network address for the remote presentation session and the connection identifier.

7. The system of claim 6, the memory further comprising instructions that upon execution cause the system at least to:

associate a socket handle for the connection object with a network address for the client device.

8. The system of claim 1, the memory further comprising instructions that upon execution cause the system at least to:

deallocate resources on the first gateway used to route the first datagram for the remote presentation session to the client device in response to receipt of a disconnect message indicating that the connection oriented channel associated with the connection identifier was disconnected.

9. The system of claim 1, the memory further comprising instructions that upon execution cause the system at least to:

deallocate resources on the first gateway used to route the first datagram for the remote presentation session to the client device in response to a determination that a timer expired.

10. A method, comprising:

receiving, by a first gateway, a connection request from a client device, the connection request including a resource network address for a remote presentation session and a connection identifier associated with a connection oriented channel established on a second gateway between the remote presentation session and the client device;

associating a network address for the first gateway with the connection identifier;

establishing a first connectionless channel; and

routing a first datagram for the remote presentation session to the client device over the first connectionless channel.

11. The method of claim 10, wherein the first datagram comprises first data indicative of a graphical user interface.

12. The method of claim 10, further comprising:

associating a network address for a third gateway with the connection identifier; and

establishing a second connectionless channel.

13. The method of claim 12, further comprising:

routing a second datagram for the remote presentation session to the client device over the second connectionless channel, the second datagram including second data indicative of audio.

14. The method of claim 10, further comprising:

instantiating a connection object, the connection object associated with the resource network address for the remote presentation session and the connection identifier.

15. The method of claim 14, further comprising:

associating a socket handle for the connection object with a network address for the client device.

16. The method of claim 10, further comprising:

deallocating resources on the first gateway used to route the first datagram for the remote presentation session to the client device in response to receipt of a disconnect message indicating that the connection oriented channel associated with the connection identifier was disconnected.

17. The method of claim 10, further comprising:

deallocating resources on the first gateway used to route the first datagram for the remote presentation session to the client device in response to a determination that a timer expired.

18. A computer readable storage device, comprising computer readable instructions that upon execution on a computing device cause the computing device at least to:

receive, by a first gateway, a connection request from a client device, wherein the connection request includes a resource network address for a remote presentation session and a connection identifier associated with a connection oriented channel established on a second gateway between the remote presentation session and the client device;

associate a network address for the first gateway with the connection identifier;

establish a first connectionless channel; and

route a first datagram for the remote presentation session to the client device over the first connectionless channel.

19. The computer readable storage device of claim 18, further comprising computer readable instructions that upon execution on the computing device cause the computing device at least to:

associate a network address for a third gateway with the connection identifier; and

establish a second connectionless channel.

20. The computer readable storage device of claim 19, further comprising computer readable instructions that upon execution on the computing device cause the computing device at least to:

route a second datagram for the remote presentation session to the client device over the second connectionless channel.