Cross-layer architecture for a network device

• US 7,733,908 B1
• Filed: 05/31/2006
• Issued: 06/08/2010
• Est. Priority Date: 05/31/2006
• Status: Active Grant

• Current Assignee: Qurio Holdings Incorporated
• Original Assignee: Qurio Holdings Incorporated
• Inventors: Evans, Gregory Morgan
• Primary Examiner(s): Ngo; Ricky
• Assistant Examiner(s): KAO, WEI PO ERIC
• Application Number:
  US11/443,882
• Time in Patent Office: 1,469 Days
• Field of Search: 370/338, 370/389, 370/352, 370/465, 370/469, 709/201, 709/202, 709/223, 709/224, 709/225, 709/230, 709/232, 709/238, 709/240
• US Class Current: 370/469
• CPC Class Codes: H04L 69/32 Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
• CPC Class Codes: H04L 69/321 Interlayer communication protocols or service data unit [SDU] definitions; Interfaces between layers

Abstract

A cross-layer architecture for a network device having a number of network interfaces is provided. Each of the network interfaces implements a number of low level layers of a protocol stack and includes an associated network based cross-layer agent. The network device also includes an application based cross-layer agent associated with one or more high level protocol stack layers including an application layer. When the application layer desires to form a network connection to another network device, an arbitration agent operates to identify one of the network interfaces for the network connection. The arbitration agent then effects interconnection of the application based cross-layer agent and the network based cross-layer agent of the network interface and interconnection of the high level protocol stack layers and the low level protocol stack layers of the network interface, thereby forming a complete protocol stack having a cross-layer architecture for the network connection.

Claims

1. A network device comprising:

a plurality of network interfaces each implementing at least one low level protocol stack layer and comprising a network based cross-layer agent associated with the at least one low level protocol stack layer; and

a control system associated with the plurality of network interfaces and comprising;

an application based cross-layer agent associated with at least one high level protocol stack layer including an application layer, the application based cross-layer agent adapted to obtain information identifying a second network device with which the application layer desires to establish a network connection and provide the information identifying the second network device to an arbitration agent; and

the arbitration agent adapted to;

identify the one of the plurality of network interfaces as a network interface for establishing a network connection with the second network device based on the information identifying the second network device;

effect interconnection of the at least one high level protocol stack layer and the one of the plurality of network interfaces identified as the network interface for establishing the network connection with the second network device; and

effect interconnection of the network based cross-layer agent of the one of the plurality of network interfaces identified as the network interface for establishing the network connection with the second network device and the application based cross-layer agent for a duration of the network connection, thereby providing a complete protocol stack having a cross-layer architecture for the network connection.

2. The network device of claim 1 wherein the plurality of network interfaces are a plurality of network interface cards.

3. The network device of claim 2 wherein for each one of the plurality of network interface cards, the network based cross-layer agent is implemented on the one of the plurality of network interface cards.

4. The network device of claim 1 wherein the at least one low level protocol stack layer comprises a physical layer, a link layer, a network layer, and a transport layer, and the at least one high level protocol stack layer comprises protocol stack layers above the transport layer including the application layer.

5. The network device of claim 1 wherein the control system further comprises a messaging matrix controlled by the arbitration agent, wherein the arbitration agent is further adapted to control the messaging matrix to effect interconnection of the at least one high level protocol stack layer and the one of the plurality of network interfaces identified as the network interface for establishing the network connection with the second network device and effect interconnection of the network based cross-layer agent of the one of the plurality of network interfaces identified as the network interface for establishing the network connection with the second network device and the application based cross-layer agent for a duration of the network connection.

6. The network device of claim 1 wherein the control system further comprises:

a plurality of application based cross-layer agents including the application based cross-layer agent each associated with at least one high level protocol stack layer including a corresponding one of a plurality of application layers including the application layer; and

a messaging matrix controlled by the arbitration agent and adapted to interconnect select ones of the plurality of application based cross-layer agents and the network based cross-layer agents of the plurality of network interfaces.

7. A method of operation of a network device to interconnect an application based cross-layer agent and one of a plurality of network based cross-layer agents in the network device, the application based cross-layer agent associated with at least one high level protocol stack layer including an application layer and the plurality of network based cross-layer agents each associated with at least one low level protocol stack layer of a corresponding one of a plurality of network interfaces, comprising:

obtaining information identifying a second network device with which the application layer desires to establish a network connection;

identifying a one of the plurality of network interfaces as a network interface for establishing the network connection;

interconnecting the at least one high level protocol stack layer and the at least one low level protocol stack layer of the one of the plurality of network interfaces identified as the network interface for establishing the network connection; and

interconnecting the application based cross-layer agent and the one of the plurality of network based cross-layer agents associated with the at least one low level protocol stack layer of the one of the plurality of network interfaces during the network connection such that a complete protocol stack having a cross-layer architecture is provided for the network connection.

8. The method of claim 7 wherein interconnecting the application based cross-layer agent and the one of the plurality of network based cross-layer agents comprises controlling a messaging matrix to interconnect the one of the plurality of network based cross-layer agents and the application based cross-layer agent.

9. The method of claim 7 wherein the at least one low level protocol stack layer comprises a physical layer, a link layer, a network layer, and a transport layer, and interconnecting the at least one high level protocol stack layer to the at least one low level protocol stack layer comprises interconnecting the at least one high level protocol stack layer to the transport layer of the one of the plurality of network interfaces.

10. The method of claim 7 wherein the network device further comprises a plurality of application based cross-layer agents including the application based cross-layer agent each associated with at least one high level protocol stack layer including a corresponding application layer, and interconnecting the application based cross-layer agent and the one of the plurality of network based cross-layer agents comprises controlling a messaging matrix adapted to interconnect select ones of the plurality of network based cross-layer agents and the plurality of application based cross-layer agents.

11. A system for interconnecting an application based cross-layer agent and one of a plurality of network based cross-layer agents in a network device, the application based cross-layer agent associated with at least one high level protocol stack layer including an application layer and the plurality of network based cross-layer agents each associated with at least one low level protocol stack layer of a corresponding one of a plurality of network interfaces, comprising:

means for obtaining information identifying a second network device with which the application layer desires to establish a network connection;

means for identifying a one of the plurality of network interfaces as a network interface for establishing the network connection;

means for interconnecting the at least one high level protocol stack layer and the at least one low level protocol stack layer of the one of the plurality of network interfaces identified as the network interface for establishing the network connection; and

means for interconnecting the application based cross-layer agent and the one of the plurality of network based cross-layer agents associated with the at least one low level protocol stack layer of the one of the plurality of network interfaces during the network connection such that a complete protocol stack having a cross-layer architecture is provided for the network connection.

12. The system of claim 11 wherein the means for interconnecting the application based cross-layer agent and the one of the plurality of network based cross-layer agents comprises a means for controlling a messaging matrix to interconnect the one of the plurality of network based cross-layer agents and the application based cross-layer agent.

13. The system of claim 11 wherein the at least one low level protocol stack layer comprises a physical layer, a link layer, a network layer, and a transport layer, and the means for interconnecting the at least one high level protocol stack layer to the at least one low level protocol stack layer interconnects the at least one high level protocol stack layer to the transport layer of the one of the plurality of network interfaces.

14. The system of claim 11 wherein the network device further comprises a plurality of application based cross-layer agents including the application based cross-layer agent each associated with at least one high level protocol stack layer including a corresponding application layer, and the means for interconnecting the application based cross-layer agent and the one of the plurality of network based cross-layer agents comprises a means for controlling a messaging matrix adapted to interconnect select ones of the plurality of network based cross-layer agents and the plurality of application based cross-layer agents.