Multi-protocol network registration and address resolution

• US 8,316,136 B2
• Filed: 05/22/2009
• Issued: 11/20/2012
• Est. Priority Date: 05/22/2009
• Status: Active Grant

• Current Assignee: Itron Networked Solutions, Inc. (Itron, Inc.)
• Original Assignee: Silver Spring Networks, Inc. (Itron, Inc.)
• Inventors: Hughes, Sterling, van Greunen, Jana, Pugh, William L.
• Primary Examiner(s): Lim, Krisna
• Application Number:
  US12/471,107
• Publication Number:
  US 20100299441A1
• Time in Patent Office: 1,278 Days
• Field of Search: 709/228, 709/242, 709/246, 709/227
• US Class Current: 709/227
• CPC Class Codes: H04L 2101/677 Multiple interfaces, e.g. multihomed nodes
• CPC Class Codes: H04L 45/123 Evaluation of link metrics techniques for monitoring network metrics H04L43/08
• CPC Class Codes: H04L 61/4511 using domain name system [DNS]

Abstract

The functionality of communications standards and protocols that are application-layer specific are overlaid on an IP-based infrastructure, by employing an IP DNS server as the registration host for IP and other communications standards based and protocol based communications. Communication can occur at either the IP layer or the communications standards or protocol application layer. At the IP layer, a host application can interrogate network nodes. To extend this service to other communications standards or protocol communications, device registration and resolve services are implemented on the DNS server. Similar to the manner in which an IP-based service uses a native, IP-based DNS resolve request, a host can utilize a resolution request against the communications standards and protocol-enabled DNS server for standards and protocol application-layer interrogation of endpoints.

Claims

1. A method of providing communication between nodes in a utility network, comprising:

receiving a request to provide an application-layer address for a Distribution Automation (DA) device in the utility network at one of a domain name service (DNS) or a directory service, the DA device being configured to communicate according to a communication protocol including at least one of MODBUS and DNP 3.0;

determining a network address for the DA device from a plurality of network addresses associated with the device stored at said service, said plurality of addresses including an application-layer address and at least one network-layer address; and

returning at least one network-layer address associated with the DA device in response to said request.

2. The method of claim 1, wherein the network address is determined according to a network address preference metric that identifies one of a plurality of network addresses to be used in communicating with the DA device.

3. The method of claim 2, wherein the network address preference metric is at least partially based upon one of the network attributes selected from the group consisting of:

routing preference, sub-network configuration, and service group.

4. The method of claim 1, wherein the network address and the at least one DA device address are included in a single message that is returned in response to the request.

5. The method of claim 1, wherein said service is implemented in a DNS server, and wherein the DNS server determines a DA device address associated with the DA device and returns said determined DA device address together with the network-layer address.

6. The method of claim 1, wherein said service is implemented in a directory server, and wherein the directory server determines a DA device address associated with the DA device and returns said determined DA device address together with the network-layer address.

7. The method of claim 1, wherein the network address is an Internet Protocol (IP)-formatted address.

8. A method of providing communication in a utility network between at least two nodes in the utility network, comprising:

receiving, at a network address resolution service, a resource record request for a specified node in the utility network;

in response to receiving the resource record request, selecting a network-layer address for the node in the utility network from an ordered list of one or more network-layer addresses associated with the node in the utility network;

determining one or more Distribution Automation (DA) device addresses for the node in the utility network, the DA device address enabling the node to communicate according to a communication protocol including at least one of MODBUS and DNP 3.0; and

returning the determined network-layer address and the determined one or more DA device addresses in response to the request.

9. The method of claim 8, wherein the ordered list is maintained in accordance with a network attribute metric, said network attribute metric specifying at least one measurable aspect of a network to determine a preferred ordering of network addresses for use in communicating with the node.

10. The method of claim 8, wherein the received resource record request includes a request to return a network-layer address associated with the node specified in the resource record request.

11. The method of claim 10, wherein the resource record request is included in a request to a domain name service (DNS) server.

12. The method of claim 10, wherein the resource record request is a directory service search.

13. The method of claim 9, wherein the resource record request is returned in a domain name service (DNS) response, and wherein the determination of the DA device addresses is performed even if the request does not specify returning DA device addresses.

14. The method of claim 9, wherein the resource record request is an LDAP search, and wherein the determination of the DA device addresses is performed even if the LDAP search does not specify returning one or more DA device addresses.

15. The method of claim 9, wherein the network-layer address is an Internet Protocol (IP)-formatted address.

16. A method of providing communication in a utility network between at least two nodes in the utility network, comprising:

receiving, at a network address resolution service, a resource record request for a specified node in the utility network;

determining a network-layer address for the specified node from among multiple network-layer addresses associated with a specified node, according to a network address metric;

determining one or more Distribution Automation (DA) device addresses for the specified node, the DA device address enabling the node to communicate according to a communication protocol including at least one of MODBUS and DNP 3.0; and

sending the determined network address and determined DA device addresses in response to the request.

17. The method of claim 16, wherein the network address metric specifies a preferred path for communicating with the node associated with the determined network-layer address.