CONTROLLING THE TRANSFER OF TERMINAL SERVER DATA

• US 20090248885A1
• Filed: 06/15/2009
• Published: 10/01/2009
• Est. Priority Date: 03/31/2006
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Hagiu, Costin, Patwardhan, Makarand V., Lotlikar, Mahesh S., Abdo, Nadim, Butt, Hammad
• Granted Patent: US 8,233,499 B2
• Time in Patent Office: Days
• US Class Current: 709/230
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/19 at layers above the network layer network arrangements for networked applications for scheduling or organising the servicing of application requests H04L67/60
• CPC Class Codes: H04L 47/2433 Allocation of priorities to traffic types
• CPC Class Codes: H04L 47/30 in combination with information about buffer occupancy at either end or at transit nodes

Abstract

The present invention extends to methods, systems, and computer program products for controlling the transfer of terminal server data. In some embodiments, contending request to send terminal server data are resolved by a flow control module situated between a terminal server protocol and a transport/network protocol. The flow control module utilizes channel priorities along with amounts of previously sent data per channel to determine how to distribute bandwidth in a relatively controlled manner between contending channels. The flow control module can be configured to intercept communication between terminal server protocol and a transport/network protocol to facilitate bandwidth distribution. In other embodiments, data is simultaneously sent over multiple channels of terminal server connection. A first write operation obtains a lock on a corresponding channel but the channel lock does not prevent write operations on other channels.

Claims

1. At a computer system, a method for simultaneously performing a plurality of channel writes on a terminal server connection, the method comprising:

an act of receiving first terminal server data corresponding to a write operation on a first channel of a terminal server connection that includes a plurality of channels;

an act of locking a write resource associated with the first channel to prevent other write operations on the first channel without locking write operations on other channels of the terminal server connection;

an act of receiving second terminal server data corresponding to a write operation on a second channel of the terminal server connection;

an act of determining that a write resource associated with the second channel is not locked; and

an act of simultaneously writing at least a portion of the first terminal server data on the first channel of the terminal server connection and at least a portion of the second terminal server data on the second channel of the terminal server connection while the write resource associated with the first channel is locked.

2. The method as recited in claim 1, wherein the act of receiving first terminal server data corresponding to a write operation on a first channel of a terminal server connection that includes a plurality of channels comprises an act of receiving a write operation on a channel of a remote desktop protocol connection.

3. The method as recited in claim 1, wherein the act of locking a write resource associated with the first channel comprises an act of modifying a value in a channel data structure used to represent the first channel.

4. The method as recited in claim 1, wherein the act of determining that a write resource associated with the second channel is not locked comprises an act checking a value in a second different channel data structure used to represent the second channel.

5. The method as recited in claim 1, wherein an act of simultaneously writing at least a portion of the first terminal server data on the first channel and at least a portion of the second terminal server data on the second channel comprises an act of simultaneously writing data over two virtual channels of a remote desktop protocol connection.