METHOD OF DYNAMIC UPDATING OF INFORMATION OBTAINED FROM A DNS SERVER

• US 20160337311A1
• Filed: 12/17/2014
• Published: 11/17/2016
• Est. Priority Date: 12/20/2013
• Status: Active Grant

• Current Assignee: Orange S.A.
• Original Assignee: Orange S.A.
• Inventors: Le Rouzic, Jean-Claude, Doree, Jose
• Granted Patent: US 10,447,650 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 41/12 Discovery or management of network topologies
• CPC Class Codes: H04L 51/224 providing notification on incoming messages, e.g. pushed notifications of received messages
• CPC Class Codes: H04L 61/4511 using domain name system [DNS]
• CPC Class Codes: H04L 61/5007 Internet protocol [IP] addresses
• CPC Class Codes: H04L 61/5076 Update or notification mechanisms, e.g. DynDNS
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/1073 Registration or de-registration
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 67/1095 Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes

Abstract

A method of dynamically updating DNS information in an IP network. A first entity of the IP network, distinct from DNS servers of the IP network, receives a request from a second entity of the network, likewise distinct from the DNS servers but possessing a copy of DNS information, constituting a record in at least one DNS server of the IP network. The first entity responds to the request by sending a message to the second entity, including an indication about the need to modify the copy. On receiving the message, the second entity determines whether the indication includes at least one additional instruction. If so, the second entity: performs a DNS interrogation, and on receiving a response, modifies its copy of the DNS information based the response and the additional instruction; or modifies its copy of the DNS information based on the additional instruction without performing a DNS interrogation.

Claims

1. A method of dynamically updating DNS information in an IP network, the method comprising the following acts:

a first entity of said IP network, distinct from DNS servers of the IP network, receives a request from a second entity of the IP network, likewise distinct from the DNS servers of the IP network but possessing a copy of information, referred to as “

DNS information”

, constituting a record in at least one DNS server of the IP network;

said first entity responds to said request by sending a message to said second entity, the message including an indication about a need to modify said copy;

on receiving said message sent by the first entity, the second entity reads the message to determine whether said indication contains at least one additional instruction; and

if so, the second entity;

performs a DNS interrogation, and on receiving a response from an interrogated DNS server, modifies its copy of said DNS information on the basis of content of said response and of said additional instruction;

or

modifies its copy of said DNS information on the basis of said additional instruction without performing a DNS interrogation.

2. A method according to claim 1 for dynamically updating DNS information, wherein said indication contained in the message sent by the first entity includes a waiting duration to be observed by the second entity before performing a DNS interrogation.

3. A method according to claim 1 for dynamically updating DNS information, wherein, if said indication does not contain an additional instruction, the second entity:

performs a DNS interrogation; and

on receiving the response from the interrogated DNS server, updates its copy of said DNS information on the basis of the content of said response.

4. A method according to claim 1 for dynamically updating DNS information, wherein said first entity observes the need to modify said copy of DNS information on said first entity receiving a notification message sent by a supervision agent for notifying certain changes of configuration of a DNS server to the entities of the IP network that have subscribed to this type of notification.

5. A method according to claim 1 for dynamically updating DNS information, wherein said first entity is a core network server.

6. A method according to claim 1 for dynamically updating DNS information, wherein said second entity is a user equipment or a core network server.

7. A device of an IP network, referred to as a “

first”

entity and distinct from DNS servers of said IP network, and possessing means for;

observing, concerning an entity of the IP network referred to as a “

second”

entity and which sent a request to the first entity, a need for said second entity of the network to modify its copy of information, referred to as “

DNS information”

, constituting a record in at least one DNS server of the IP network;

sending, in response to said request, a message to said second entity of the network, the message including an indication about said need; and

subscribing with a dedicated supervision agent to notification of certain configuration changes of a DNS server, and wherein said means for observing a need to modify said copy of DNS information comprise means for receiving a notification message sent by said supervision agent.

11. The device of claim 7, wherein the device is implemented in IP core network server.

8. A device of an IP network distinct from DNS servers of said IP network and referred to as a “

second”

entity, wherein the second entity possesses means for;

receiving from an entity of the IP network referred to as a “

first”

entity and that is distinct from the DNS servers of the IP network, in response to a request sent by said second entity to said first entity, a message including an indication about a need to modify its copy of information, referred to as “

DNS information”

, constituting a record in at least one DNS server of the IP network;

reading said message to determine whether said indication contains at least one additional instruction; and

if so;

performing a DNS interrogation, and on receiving a response from an interrogated DNS server, modifying its copy of said DNS information on the basis of content of said response and of said additional instruction;

or

modifying its copy of said DNS information on the basis of said additional instruction without performing a DNS interrogation.

9. A The device according to claim 8, further possessing means for performing a DNS interrogation after waiting for a duration mentioned in said indication.

10. A The device according to claim 8, further possessing means for, if said indication does not contain an additional instruction:

performing a DNS interrogation; and

on receiving the response from the interrogated DNS server, updating its copy of said DNS information on the basis of the content of said response.

12. The device of claim 8, wherein the device is implemented in a terminal.

15. The device of claim 8, wherein the device is implemented in an IP core network server.

13. (canceled)

14. A non-transitory computer-readable medium comprising a computer program stored thereon, which is executable by a processor of a “

second”

entity of an IP network distinct from DNS servers of said IP network, wherein the computer program includes instructions for executing a method for dynamically updating DNS information, and wherein the instructions configure the second entity to perform acts of;

receiving from an entity of the IP network referred to as a “

first”

entity and that is distinct from the DNS servers of the IP network, in response to a request sent by said second entity to said first entity, a message including an indication about a need to modify its copy of information, referred to as “

DNS information”

, constituting a record in at least one DNS server of the IP network;

reading said message to determine whether said indication contains at least one additional instruction; and

if so;

performing a DNS interrogation, and on receiving a response from an interrogated DNS server, modifying its copy of said DNS information on the basis of content of said response and of said additional instruction;

or

modifying its copy of said DNS information on the basis of said additional instruction without performing a DNS interrogation.

16. A non-transitory computer-readable medium comprising a computer program stored thereon, which is executable by a processor of a “

first”

entity of an IP network and distinct from DNS servers of said IP network, wherein the computer program includes instructions that configure the first entity to perform acts of;

observing, concerning an entity of the IP network referred to as a “

second”

entity and which sent a request to the first entity, a need for said second entity of the network to modify its copy of information, referred to as “

DNS information”

, constituting a record in at least one DNS server of the IP network;

sending, in response to said request, a message to said second entity of the network, the message including an indication about said need; and

subscribing with a dedicated supervision agent to notification of certain configuration changes of a DNS server, and wherein said observing a need to modify said copy of DNS information comprise receiving a notification message sent by said supervision agent.