Multi-protocol network registration and address resolution

• US 7,783,764 B2
• Filed: 05/27/2008
• Issued: 08/24/2010
• Est. Priority Date: 05/27/2008
• Status: Active Grant

• Current Assignee: Itron Networked Solutions, Inc. (Itron, Inc.)
• Original Assignee: Silver Spring Networks, Inc. (Itron, Inc.)
• Inventors: McKernan, Daniel S., Pace, James, Lew, Winston D.
• Primary Examiner(s): Lim; Krisna
• Application Number:
  US12/127,601
• Publication Number:
  US 20090300191A1
• Time in Patent Office: 819 Days
• Field of Search: 709/228, 709/242, 709/246, 707/3
• US Class Current: 709/228
• CPC Class Codes: G01D 4/002 Remote reading of utility meters
• CPC Class Codes: H04L 2101/365 Application layer names, e.g. buddy names, unstructured names chosen by a user or home appliance name
• CPC Class Codes: H04L 61/30 Managing network names, e.g. use of aliases or nicknames name-to-address mapping H04L61/45
• CPC Class Codes: H04L 61/4511 using domain name system [DNS]
• CPC Class Codes: H04L 67/125 involving control of end-device applications over a network
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/085 specially adapted for interworking of IP-based networks with other networks
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y04S 20/30 Smart metering, e.g. specially adapted for remote reading

Abstract

The functionality of a C12.22 application layer is overlaid on an IP-based infrastructure, by employing an IP DNS server as the registration host for both IP- and C12.22-based communications. Communication can occur at either the IP layer or the C12.22 application layer. At the IP layer, a host application can interrogate network nodes. To extend this service to C12.22 communications, C12.22 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 C12.22 host can utilize a C12.22 resolution request against the C12.22-enabled DNS server for C12.22 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 C12.22-compliant device in the utility network at one of a domain name service or a directory service;

determining a network address for the C12.22-compliant device from a plurality of network addresses associated with the C12.22-compliant device stored at said one of the domain name service or directory 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 C12.22-compliant 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 C12.22-compliant device.

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

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

4. The method of claim 1, wherein the network address and at least one C12.22 ApTitle is included in a single message that is returned in response to the request.

5. The method of claim 1, wherein said domain name service is implemented in a DNS server, and wherein the DNS server determines a C12.22 ApTitle associated with the device and returns said determined ApTitle together with the network-layer address.

6. The method of claim 1, wherein said directory service is implemented in a directory server, and wherein the directory server determines a C12.22 ApTitle associated with the device and returns said determined ApTitle together with the network-layer address.

7. The method of claim 1 where the network address is an 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 C12.22 ApTitles for the node in the utility network; and

returning the determined network-layer address and the determined one or more C12.22 ApTitles 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 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 DNS response, and wherein the determination of the C12.22 ApTitles is performed even if the request does not specify returning C12.22 ApTitles.

14. The method of claim 9, wherein the resource record request is an LDAP search, and wherein the determination of the C12.22 ApTitles is performed even if the LDAP search does not specify returning one or more C12.22 ApTitles.

15. The method of claim 9 wherein the network-layer address is an 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 C12.22 ApTitles for the specified node; and

sending the determined network address and determined C12.22 ApTitles 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.

18. A network name/address resolution server having stored therein resource records that respectively relate to nodes on a network and contain one or more addresses for communicating with each of the nodes,

wherein at least some of said resource records contain an identification of a node, one or more network-layer addresses for the identified node, and at least one application-layer address for the node,

and wherein, in response to a request to provide an address for a specified node, said server returns either a network-layer address or the application-layer address, in accordance with the request.

19. The server of claim 18, wherein said server implements a domain name service.

20. The server of claim 18, wherein said server implements a directory service.

21. The server of claim 20, wherein said directory service is LDAP.

22. The server of claim 18, wherein, in response to a request to provide an application-layer address, said server returns a network-layer service.

23. A node in a utility network, comprising:

a first interface that communicates with an associated device by means of a C12.22 protocol;

a second interface that communicates with a network by means of an IP protocol; and

a processor that, in response to receipt of an IP-based data packet via said second interface, reformats data in said packet to conform to the C12.22 protocol and forwards the reformatted data via said first interface, and that, in response to receipt of C12.22 formatted data at said first interface, reformats said data into an IP-based packet and transmits said packet over the network via said second interface.

24. The node of claim 23, wherein said second interface transmits packets wirelessly over said network.