Systems and methods of QoS for single stream ICA

Patent metadata

Field	Value
Publication number	US-9237106-B2
Application number	US-201213413508-A
Country	US
Kind code	B2
Filing date	Mar 6, 2012
Priority date	Mar 11, 2011
Publication date	Jan 12, 2016
Grant date	Jan 12, 2016

Abstract

The present solution provides quality of service (QoS) for a stream of protocol data units via a single transport layer connection. A device receives via a single transport layer connection a plurality of packets carrying a plurality of protocol data units. Each protocol data unit identifies a priority. The device may include a filter for determining an average priority for a predetermined window of protocol data units and an engine for assigning the average priority as a connection priority of the single transport layer connection. The device transmits via the single transport layer connection the packets carrying those protocol data units within the predetermined window of protocol data units while the connection priority of the single transport layer connection is assigned the average priority for the predetermined window of protocol data units.

First claim

What is claimed:

1. A method for providing quality of service (QoS) for a stream of protocol data units, the method comprising:
(a) receiving, by a device via a single transport layer connection, a plurality of packets carrying a plurality of protocol data units, each protocol data unit of the plurality of protocol data units identifying a priority, at least one or more of the plurality of protocol data units comprising a first priority different than a second priority of other protocol data units of the plurality of protocol data units;
(b) determining, by the device, an average priority for a plurality of protocol data units within a predetermined window of protocol data units of the plurality of protocol data units;
(c) assigning, by the device, the average priority as a connection priority of the single transport layer connection; and
(d) transmitting, by the device via the single transport layer connection, the plurality of packets carrying those protocol data units within the predetermined window of protocol data units while the connection priority of the single transport layer connection is assigned the average priority for the predetermined window of protocol data units.

2. The method of claim 1 , wherein step (a) further comprises receiving, by the device via the single transport layer connection, the plurality of packets carrying the plurality of protocol data units of a remote display protocol, each protocol data unit corresponding to a virtual channel, the virtual channel assigned the priority of the protocol data unit.

3. The method of claim 1 , wherein step (a) further comprises buffering, by the device, the plurality of packets until the connection priority for the plurality of packets is assigned to the transport layer connection.

4. The method of claim 1 , wherein step (b) further comprises determining, by a filter of the device, the average priority based on finite impulse response (FIR) filtering.

5. The method of claim 1 , wherein step (b) further comprises determining, by a filter of the device, the average priority based on infinite impulse response (IIR) filtering.

6. The method of claim 1 , wherein step (b) further comprise identifying, by the device, the predetermined window as comprising a predetermined number of protocol data units.

7. The method of claim 1 , wherein step (c) further comprises setting, by the device, a Differentiated Services Code Point (DSCP) field in the plurality of packets to correspond to the connection priority assigned to the single transport layer connection.

8. The method of claim 1 , wherein step (d) further comprising transmitting, by the device, a first packet of the plurality of data packets with the connection priority identified via one of an internet protocol (IP layer) or transport layer and the first packet carrying a first protocol data unit having the priority identified via a protocol above the transport layer.

9. The method of claim 1 , further comprising:
determining, by the device, a second average priority for a second predetermined window of protocol data units of a second plurality of protocol data units and assigning, by the device, the second average priority as the connection priority of the single transport layer connection; and
transmitting, by the device via the single transport layer connection, a second plurality of packets carrying those protocol data units within the second predetermined window of protocol data units while the connection priority of the single transport layer connection is assigned the second average priority for the second predetermined window of protocol data unit.

10. A system for providing quality of service (QoS) for a stream of protocol data units, the system comprising:
a device intermediary to a sender and receiver that receives via a single transport layer connection a plurality of packets carrying a plurality of protocol data units, each protocol data unit of the plurality of protocol data units identifying a priority, at least one or more of the plurality of protocol data units comprising a first priority different than a second priority of other protocol data units of the plurality of protocol data units;
a filter of the device determining an average priority for a plurality of protocol data units within a predetermined window of protocol data units of the plurality of protocol data units;
an engine of the device assigning the average priority as a connection priority of the single transport layer connection; and
wherein the device transmits via the single transport layer connection the plurality of packets carrying those protocol data units within the predetermined window of protocol data units while the connection priority of the single transport layer connection is assigned the average priority for the predetermined window of protocol data units.

11. The system of claim 10 , wherein the device receives via the single transport layer connection the plurality of packets carrying the plurality of protocol data units of a remote display protocol, each protocol data unit corresponding to a virtual channel, the virtual channel assigned the priority of the protocol data unit.

12. The system of claim 10 , wherein the engine buffers the plurality of packets until the connection priority for the plurality of packets is assigned to the transport layer connection.

13. The system of claim 10 , wherein the filter determines the average priority based on finite impulse response (FIR) filtering.

14. The system of claim 10 , wherein the filter determines the average priority based on infinite impulse response (IIR) filtering.

15. The system of claim 10 , wherein the engine sets the Differentiated Services Code Point (DSCP) field in the plurality of packets to correspond to the connection priority assigned to the single transport layer connection.

16. The system of claim 10 , wherein the device transmits a first packet of the plurality of data packets with the connection priority identified via one of an internet protocol (IP layer) or transport layer and the first packet carrying a first protocol data unit having the priority identified via a protocol above the transport layer.

17. The system of claim 10 , wherein:
the filter determines a second average priority for a second predetermined window of protocol data units of a second plurality of protocol data units and the engine assigns the second average priority as the connection priority of the single transport layer connection; and
the device transmits via the single transport layer connection, a second plurality of packets carrying those protocol data units within the second predetermined window of protocol data units while the connection priority of the single transport layer connection is assigned the second average priority for the second predetermined window of protocol data units.

18. A method for providing quality of service (QoS) for a stream of protocol data units, the method comprising:
(a) receiving, by a device via a single transport layer connection, a plurality of protocol data units including a first protocol data unit identifying a first priority and a second protocol data unit identifying a second priority different from the first priority;
(b) determining, by the device, an average priority of the identified first priority and second priority;
(c) assigning, by the device, the average priority as a connection priority of the single transport layer connection; and
(d) transmitting, by the device via the single transport layer connection, the first protocol data unit identifying the first p

Assignees

• Ovsiannikov Michael
• Citrix Systems Inc

Inventors

• Ovsiannikov Michael

Classifications

• H04L47/6215 Primary

  Individual queue per QOS, rate or priority · CPC title

• H04L47/193

  at the transport layer, e.g. TCP related · CPC title

• H04L47/41 Primary

  by acting on aggregated flows or links · CPC title

• H04L47/2441 Primary

  relying on flow classification, e.g. using integrated services [IntServ] · CPC title

• H04L47/24

  Traffic characterised by specific attributes, e.g. priority or QoS · CPC title