Mobile node assignement to a router in a WPAN stimulation

• US 8,837,283 B2
• Filed: 09/02/2010
• Issued: 09/16/2014
• Est. Priority Date: 09/11/2009
• Status: Expired due to Fees

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Rudland, Philip Andrew
• Primary Examiner(s): Phan, Tri H
• Application Number:
  US13/395,511
• Publication Number:
  US 20120176986A1
• Time in Patent Office: 1,475 Days
• Field of Search: 370229-231, 370235-238, 370310-350, 370389-392, 370400-402, 370242-246, 370/248, 370250-252, 370254-258, 455445-465
• US Class Current: 370/230
• CPC Class Codes: H04L 41/12 Discovery or management of network topologies
• CPC Class Codes: H04L 43/0811 by checking connectivity
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04W 40/248 Connectivity information update

Abstract

A method and system to assign a mobile node to a router in a wireless multihop mesh network. A request from a mobile node to join the network is received. A server is notified of the request to join the network, and transmits a positive response to the mobile node upon establishing a connecting between the mobile node and network, and then generates an association record between the mobile node and a router. The association record is then recorded and it is determined if a previous association record exists between the mobile node and at least one other router. If previous association record exists, then a message to suppress any association record between the mobile node and the at least one other router is sent.

Claims

1. A method to assign a mobile node to a router in a wireless multihop mesh network, the method comprising:

receiving a request from a mobile node to join the network;

notifying a server of the request to join the network;

transmitting a positive response to the mobile node upon establishing a connection between the mobile node and network and generating an association record between the mobile node and a router;

recording the association record; and

if a previous association record exists between the mobile node and at least one other router, sending a message to the at least one other router to suppress any association record between the mobile node and the at least one other router.

2. The method of claim 1, further comprising:

transmitting an update message at periodic time intervals from the mobile node for updating the association record.

3. The method of claim 2, further comprising:

deleting the association record if an update message is not received within a predetermined time interval; and

transmitting a message to the router for cancelling the connection with the mobile node and suppressing any association record of the connection.

4. The method of claim 2, further comprising:

transmitting a response to the mobile node upon receiving an update message from the mobile node;

determining if the mobile node received the response within a predetermined time interval; and

transmitting a new request to join the network from the mobile node if the response was not received within the predetermined time interval.

5. The method of claim 2, wherein the update message comprises a heartbeat message that is transmitted from the mobile node at periodic time intervals to update the association record.

6. The system of claim 5, wherein the update message is configured to update the association record with a time that the update message was received.

7. A server in a wireless multihop mesh network, the network comprising a plurality of routers, the server comprising:

an interface for communicating with the routers;

a mobile node manager comprising a mobile node memory, the mobile node manager configured to;

receive notification of a request by a mobile node to join the network via a router;

recording an association record between the mobile node and the router; and

if a previous association record exists between the mobile node and at least one other router, sending a message to the at least one other router to suppress any association record between the mobile node and the at least one other router.

8. The server of claim 7, further comprising:

receiving an update message at periodic time intervals from the mobile node via the router for updating the association record.

9. The server of claim 8, wherein if the update message is not received within a predetermined time interval, the mobile node manager is configured to delete the association record between the mobile node and the router and to send a message to the router for cancelling a connection with the mobile node and suppressing any association record of the connection.

10. The server of claim 8, further comprising:

the mobile node manager configured to;

transmit a response to the mobile node upon receiving the update message from the mobile node;

determine if the mobile node received the response within a predetermined time interval; and

receive a new request to join the network from the mobile node if the response was not received within the predetermined time interval.

11. A system, comprising:

a wireless multihop mesh network, the network comprising a plurality of routers and at least one server, at least one of the plurality of routers and at least one of the at least one server comprising;

a processor and a memory adapted to store computer executable instructions, the computer executable instructions that when executed cause the processor to;

receive a request from a mobile node to join the network;

notify the at least one server of the request to join the network;

transmit a positive response to the mobile node upon establishing a connection between the mobile node and network, and generate an association record between the mobile node and a router;

record the association record; and

if a previous association record exists between the mobile node and at least one other router, transmit a message to the at least one other router to suppress any association record between the mobile node and the at least one other router.

12. The system of claim 11, further comprising computer executable instructions that when executed cause the processor to:

transmit an update message at periodic time intervals from the mobile node to update the association record.

13. The system of claim 12, wherein the update message comprises a heartbeat message that is transmitted from the mobile node at the periodic time intervals to update the association record.

14. The system of claim 13, wherein the update message is configured to update the association record with a time that the update message was received.

15. The system of claim 12, further comprising computer executable instructions that when executed cause the processor to:

delete the association record if an update message is not received within a predetermined time interval; and

transmit a message to the router to cancel the connection with the mobile node and suppress any association record of the connection.

16. The system of claim 12, further comprising computer executable instructions that when executed cause the processor to:

transmit a response to the mobile node upon receiving the update message from the mobile node;

determine if the mobile node received the response within a predetermined time interval; and

transmit a new request to join the network from the mobile node if the response was not received within the predetermined time interval.