SYSTEM AND METHOD FOR ROUTING AND DOMAIN NAME SYSTEM SUPPORT OF A MOBILE NODE

• US 20080037479A1
• Filed: 08/14/2006
• Published: 02/14/2008
• Est. Priority Date: 08/14/2006
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Janneteau, Christophe, Narayanan, Vidya, Popovich, George
• Granted Patent: US 7,707,313 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04L 61/5014 using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
• CPC Class Codes: H04L 61/5076 Update or notification mechanisms, e.g. DynDNS
• CPC Class Codes: H04W 8/082 for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]

Abstract

System and method are provided for establishing internet protocol (IP) communication between a mobile node (MN) and one or more mobile networks. The method includes receiving (100) a request from a MN when the MN joins a first mobile network, creating (105) routing information indicating a home address of the MN, and announcing (110) the home address to the nodes of the mobile network(s). The request indicates the home address of the MN.

Claims

1. A method for establishing internet protocol communication between a visiting mobile node and a node in one or more mobile networks having a plurality of nodes, the visiting mobile node having a home address, the method comprising:

receiving a request from the visiting mobile node when the visiting mobile node joins a first mobile network of the one or more mobile networks, the request indicating the home address of the visiting mobile node;

creating routing information indicating the home address of the visiting mobile node; and

announcing the home address to the plurality of nodes of the one or more mobile networks.

2. A method according to claim 1, wherein the one or more mobile networks comprises a dynamic host configuration protocol server;

and wherein the request is a dynamic host configuration protocol request; and

wherein said creating step comprises creating a notification, the notification indicating the home address of the visiting mobile node.

3. A method according to claim 2, wherein the one or more mobile networks further comprises a mobile router;

and wherein the method further comprises sending the notification from the dynamic host configuration protocol server to the mobile router prior to said announcing step.

4. A method according to claim 1, wherein the one or more mobile networks comprises a dynamic host configuration protocol server, the dynamic host configuration protocol server selecting a temporary address for the visiting mobile node in response to the request from the visiting mobile node;

and wherein said creating step comprises creating a notification, the notification indicating the home address of the visiting mobile node and the temporary address of the visiting mobile node.

5. A method according to claim 4, wherein the one or more mobile networks further comprises a mobile router;

and wherein the method further comprises sending the notification from the dynamic host configuration protocol server to the mobile router prior to said announcing step.

6. A method according to claim 1, wherein the one or more mobile networks comprises a dynamic host configuration protocol server and a domain name system server;

wherein the visiting mobile node has a fully qualified domain name; and

wherein said creating step comprises;

creating a notification, the notification indicating the home address of the visiting mobile node and the of the visiting mobile node; and

sending the notification from the dynamic host configuration protocol server to the domain name system server, the domain name system server associating the home address of the visiting mobile node with the fully qualified domain name of the visiting mobile node in response to the notification.

7. A method according to claim 1, wherein the one or more mobile networks comprises a mobile router having a routing table comprising the routing information;

and wherein the method further comprises;

receiving a release from the visiting mobile node when the visiting mobile node leaves the first mobile network of the one or more mobile networks, the release indicating the home address of the visiting mobile node;

removing the routing information for the home address of the visiting mobile node from the routing table of the mobile router; and

discontinuing said announcing step.

8. A method according to claim 7, wherein the one or more mobile networks further comprises a dynamic host configuration protocol server;

and wherein said removing step comprises sending a first notification from the dynamic host configuration protocol server to the mobile router, the first notification indicating the home address of the visiting mobile node.

9. A method according to claim 8, wherein the visiting mobile node has a fully qualified domain name;

wherein the one or more mobile networks further comprises a domain name system server having an association between the home address of the visiting mobile node and the fully qualified domain name of the visiting mobile node; and

wherein said sending step comprises sending a second notification from the dynamic host configuration protocol server to the domain name system server, the second notification indicating the home address of the visiting mobile node and the fully qualified domain name of the visiting mobile node, the domain name system server removing the association between the home address of the visiting mobile node and the fully qualified domain name of the visiting mobile node in response to the second notification.

10. A method according to claim 1, wherein the first mobile network is autonomous;

wherein the one or more mobile networks comprises a domain name system server and a mobile router;

wherein the visiting mobile node has a fully qualified domain name;

wherein the request indicates the home address of the visiting mobile node and the fully qualified domain name of the visiting mobile node;

wherein said creating step comprises associating the home address of the visiting mobile node with the fully qualified domain name of the visiting mobile node.

11. A method according to claim 1, wherein the first mobile network is autonomous;

wherein the one or more mobile networks comprises a domain name system server and a mobile router, the domain name system server having a cache;

wherein the visiting mobile node has a fully qualified domain name;

wherein the request indicates the home address of the visiting mobile node and the fully qualified domain name of the visiting mobile node; and

wherein said creating step comprises associating the fully qualified domain name of the visiting mobile node with the home address of the visiting mobile node in the cache of the domain name system server.

12. A method according to claim 11, wherein the one or more mobile networks comprises a domain name system server and a mobile router, the mobile router having a directly reachable network list;

and wherein the method further comprises;

adding the home address of the visiting mobile node to the directly reachable network list; and

sending the directly reachable network list to the plurality of nodes of the one or more mobile networks.

13. A method for establishing an internet protocol communication for a mobile node in a foreign domain, the mobile node having a home address, the method comprising:

receiving a request from the mobile node when the mobile node enters the foreign domain, the request indicating the home address of the mobile node;

selecting a temporary address for the mobile node in response to the request; and

creating a first notification indicating the home address of the mobile node and the temporary address of the mobile node.

14. A method according to claim 13, wherein the foreign domain comprises a first router having connectivity to the Internet;

and wherein the method further comprises;

sending the first notification to the first router;

creating a route for the home address of the mobile node based on the temporary address of the mobile node; and

announcing the home address inside the foreign domain.

15. A method according to claim 14, wherein the mobile node has a fully qualified domain name;

wherein the foreign domain comprises a domain name system server; and

wherein the method further comprises;

creating a second notification indicating the home address of the mobile node and the fully qualified domain name of the mobile node;

sending the second notification to the domain name system server; and

associating the fully qualified domain name of the mobile node with the home address of the mobile node in response to the second notification.

16. A method according to claim 14 further comprising sending an acknowledgement to the mobile node in response to the request, the acknowledgement indicating the temporary address of the mobile node.

17. A method according to claim 13, wherein the foreign domain comprises a dynamic host configuration protocol server;

wherein the request is a dynamic host configuration protocol request; and

wherein said receiving step comprises receiving the dynamic host configuration protocol request from the mobile node by the dynamic host configuration protocol server.

18. A method according to claim 13, wherein the foreign domain comprises second and third routers;

wherein said receiving step comprises receiving a first request when the mobile node moves to the second router;

wherein said selecting comprises selecting a first temporary address in response to the first request;

wherein said creating step comprises creating the first notification indicating the home address of the mobile node and the first temporary address; and

wherein the method further comprises;

receiving a second request when the mobile node moves to the third router;

selecting a second temporary address in response to the second request; and

creating a second notification indicating the home address of the mobile node and the second temporary address of the mobile node.

19. A method for establishing an internet protocol communication for a mobile node in one or more mobile networks, the one or more mobile networks comprising a mobile router, the mobile node having a home address, the mobile router having a home agent, the method comprising:

receiving a request when the mobile node leaves a first mobile network of the one or more mobile networks, the request indicating a departure of the mobile node;

intercepting a communication packet for the mobile node in response to the request; and

directing the communication packet for the mobile node to the home agent of the mobile router.

20. A method according to claim 19, wherein said intercepting step comprises address resolution protocol proxying for the home address of the mobile node.

21. A method according to claim 19, wherein the request is a dynamic host configuration protocol request;

and wherein said receiving step comprises receiving the request from the mobile node by the mobile router when the mobile node leaves the first mobile network of the one or more mobile networks.

22. A system for routing communication between a mobile node and one or more nodes of a network, the mobile node having a home address, the system comprising:

a router configured to;

receive a request for a temporary address from the mobile node, said request comprising the home address of the mobile node;

create routing information indicating the home address of the mobile node; and

announce the home address of the mobile node to the one or more nodes of the network.

23. A system according to claim 22 further comprising a processing device configured to:

create a notification upon receiving said request, said notification indicating the home address of the mobile node; and

send said notification to said router; and

wherein said router has a routing table and is further configured to;

create an entry in said routing table indicating the home address of the mobile node as directly reachable via said router; and

route packets to the home address of mobile node.

24. A system according to claim 22, wherein the mobile node has a fully qualified domain name;

wherein said request further comprises the fully qualified domain name of the mobile node;

wherein said router is further configured to create a notification indicating an association between the fully qualified domain name of the mobile node and the home address of the mobile node; and

wherein the system further comprises a domain name system server configured to;

receive said notification from said router; and

store said association between the fully qualified domain name of the mobile node and the home address of the mobile node.