Point-to-point protocol with a signaling channel

• US 6,118,785 A
• Filed: 04/07/1998
• Issued: 09/12/2000
• Est. Priority Date: 04/07/1998
• Status: Expired due to Term

• Current Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Original Assignee: 3Com Corporation (HP Inc.)
• Inventors: Araujo, Kenneth, Wang, Peter Si-Sheng
• Primary Examiner(s): Jung, Min
• Application Number:
  US09/056,280
• Time in Patent Office: 889 Days
• Field of Search: 370/400, 370/401, 370/402, 370/466, 370/468, 370/522, 370/524, 370/410
• US Class Current: 370/401
• CPC Class Codes: H04L 12/2856 Access arrangements, e.g. Internet access asynchronous transfer mode networks H04L12/5601; broadband local area networks H04L12/2801; optical access or distribution networks H04Q11/0067; access to open networks H04L12/5691; digital subscriber line end-user equipment and bit-level processing of data on a PSTN-based network H04M11/00; home network gateways H04L12/2834; wireless access networks H04W
• CPC Class Codes: H04L 12/2859 Point-to-point connection between the data network and the subscribers encapsulation H04L12/4633; virtual LANs H04L12/4641; routing of packets H04L45/00
• CPC Class Codes: H04L 12/2874 Processing of data for distribution to the subscribers

Abstract

A communication protocol designed for managing the communication between peers, such as the point-to-point protocol, includes a signaling channel in frames formatted according to the communication protocol. The signaling channel is utilized by intermediate devices in the access provider network, such as central office switches or other concentration points in the network to facilitate the management of the flow of data traffic in the access providers network. The signaling channel is identified in the intermediate devices and in the end stations, such as customer premises equipment or remote access servers, by a particular value in the Protocol field of the PPP encapsulation format for example. The intermediate device is configured to monitor the protocol field, and when the particular value is recognized, to process the frame at the intermediate device. Likewise, the end station is configured to recognize the particular value in the protocol field, and to process the packet received according to the signaling channel function specified by that particular value.

Claims

1. In a system including a network having one or more intermediate devices coupled to end stations by respective links, and through which a point-to-point data channel is established from a first end station through a first intermediate device through the network to a second end station, the point-to-point data channel operating according to a communication protocol between the first and second end stations, the first intermediate device including resources for managing use of bandwidth in the network, a method for improving network performance, comprising:

detecting in the first intermediate device data frames in the point-to-point data channel the data frames being formatted according to the first communication protocol;

processing said data frames in the intermediate device for transmission through the network using the resources for managing use of network bandwidth; and

transmitting from the first intermediate device to the first end station information related to the management of network bandwidth in a data frame formatted according to the first communication protocol.

2. The method of claim 1, wherein the processing said data frames includes encapsulating at least a portion of said data frames according to a second communication protocol for transmission through at least a portion of the network, and wherein the information related to management of network resources includes data enabling the first end station to reduce processing steps in said encapsulating by processing data frames formatted according to the first communication protocol for the point-to-point communication channel.

3. The method of claim 1, wherein the first communication protocol comprises a Point to Point Protocol PPP.

4. The method of claim 3, wherein the data frames include a reserved field, and said transmitting includes sending a frame including PPP packet from the intermediate device to the end station, including a code in the reserved field indicating that a signal related to the management of network resources is carried in the data frame.

5. The method of claim 4, wherein the reserved field comprises a protocol field specified for PPP protocol identification functions.

6. The method of claim 1, wherein the resources for management of network bandwidth comprise resources for executing a layer 2 tunneling protocol L2TP.

7. The method of claim 2, wherein said encapsulating includes generating encapsulation data and constructing network packets including the encapsulation data, and wherein the information relating to the management of network resources includes data enabling the first end station to provide at least a portion of the encapsulation data in data frames formatted according to the first communication protocol.

8. The method of claim 1, wherein the resources for management of network bandwidth include multicast distribution resources by which a single multicast packet from the first end station is forwarded to a plurality of recipients by the intermediate device, and wherein the information related to the management of network bandwidth includes data related to the multicast distribution resources.

9. The method of claim 1, including:

receiving a data frame formatted according to the first communication protocol at the first intermediate device including information originating in the end station related to management of network bandwidth.

10. The method of claim 8, including:

receiving a data frame formatted according to the first communication protocol at the first intermediate device including information originating in the end station related to management of network bandwidth;

wherein the information originating from the end station includes data related to the multicast distribution resources.

11. In a system including a network having one or more intermediate devices coupled to end stations by respective links, and through which a point-to-point data channel is established from a first end station through a first intermediate device through the network to a second end station, the point to point data channel operating according to a first communication protocol between the first and second end stations, the first intermediate device including resources for managing use of network resources, a method for improving network performance, comprising:

establishing the point-to-point data channel for carrying data frames formatted according to the first communication protocol; and

transmitting a data frame in the point-to-point data channel formatted according to the first communication protocol including information directed to the first intermediate device related to managing use of network resources.

12. The method of claim 11, wherein the first intermediate device comprises resources for encapsulating said data frames according to a second communication protocol for transmission through at least a portion of the network, and the information related to managing use of network resources includes data enabling the first intermediate device to reduce processing steps in said encapsulating.

13. The method of claim 11, wherein the first communication protocol comprises a Point to Point Protocol PPP.

14. The method of claim 13, wherein the data frames include a reserved field, and said transmitting includes sending a frame including a PPP packet from the intermediate device to the end station, including a code in the reserved field indicating that information related to managing use of network resources is carried in the data frame.

15. The method of claim 14, wherein the reserved field comprises a protocol field specified for PPP protocol identification functions.

16. The method of claim 11, wherein the resources for managing use of network resources comprise resources for executing a layer 2 tunneling protocol L2TP.

17. The method of claim 12, wherein said encapsulating includes generating encapsulation data and constructing network data packets including the encapsulation data, and wherein the information relating to the management of network resources includes data enabling the first end station to provide at least a portion of the encapsulation data in data frames formatted according to the first communication protocol.

18. The method of claim 11, wherein the resources for managing use of network resources includes multicast distribution resources by which a single multicast packet from the first end station is forwarded to a plurality of recipients by the intermediate device, and wherein the information related to the managing use of network resources includes data related to the multicast distribution resources.

19. The method of claim 11, including:

receiving a data frame formatted according to the first communication protocol at the first end station including information originating in the first intermediate device related to management of network bandwidth.

20. The method of claim 18, including:

receiving a data frame formatted according to the first communication protocol at the first end station including information originating in the first intermediate device related to managing use of network resources;

wherein the information originating from the first intermediate device includes data related to the multicast distribution resources.