METHOD AND APPARATUS FOR MANAGING WIRELESS NETWORK

• US 20130148595A1
• Filed: 12/05/2012
• Published: 06/13/2013
• Est. Priority Date: 12/07/2011
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Lee, Anseok, Shin, Wooram, Kim, Hyun-jae, Lim, Kwang Jae, Kwon, DongSeung
• Granted Patent: US 8,989,144 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

If a target node that enters into a transmission range is sensed, a mesh node of a wireless communication system selects an agent node having itself and a target node as a neighboring node among a plurality of neighboring nodes to form a link with the target node through the agent node. Also, the mesh node deletes the formed link if a target node that is out of a transmission range among a plurality of neighboring nodes is sensed, and forms a substitution path for at least a portion among an entire path of a connection including the deleted link.

Claims

1. A wireless network managing method of a mesh node, comprising:

sensing a target node within a transmission range of the mesh node;

selecting an agent node having the target node and the mesh node as neighboring nodes; and

forming a link with the target node through the agent node.

2. The wireless network managing method of claim 1, wherein

the forming includes:

transmitting a link formation request message to the target node through the agent node; and

receiving a link formation response message for the link formation request message from the target node through the agent node,

wherein the link formation response message includes information on whether the link formation is permitted.

3. The wireless network managing method of claim 2, wherein

the link formation request message includes information on the mesh node, and the link formation response message includes information on the target node.

4. The wireless network managing method of claim 1, wherein

the selecting includes:

receiving neighboring node information on the neighboring node from the neighboring node; and

selecting a neighboring node having the target node among neighboring nodes of the mesh node as the agent node.

5. The wireless network managing method of claim 1, wherein

the sensing includes

recognizing the target node based on quality information of the signal transmitted from the target node or predicted quality information at the target node.

6. The wireless network managing method of claim 5, wherein

the quality information includes an RSSI (received signal strength indication) or a CINR (carrier-to-interference noise ratio).

7. The wireless network managing method of claim 1, further comprising:

sensing an egress node that is out of the transmission range among a plurality of neighboring nodes forming the link with the mesh node; and

deleting the link with the egress node.

8. The wireless network managing method of claim 7, wherein

the deleting includes

setting a substitution path for a connection when the connection including the deleted link exists.

9. The wireless network managing method of claim 8, wherein

the setting of the substitution path includes

changing an entire end-to-end path of the connection.

10. The wireless network managing method of claim 8, wherein

the setting of the substitution path includes

changing a portion of end-to-end path which including deleted link.

11. The wireless network managing method of claim 8, wherein

the setting of the substitution path includes

requesting connection restoration to a node initiating establishment of the substitution path through another node when changing the a portion of end-to-end path of the connection.

12. The wireless network managing method of claim 8, wherein

the setting of the substitution path includes

increasing a change count of the substitution path.

13. A wireless network managing apparatus of a mesh node, comprising:

a neighboring node managing unit managing a plurality of neighboring nodes positioned inside a transmission range of the mesh node based on a message transmitted from a plurality of neighboring nodes, if a target node newly enters into the transmission range, selecting an agent node having the target node and the mesh node as a neighboring node among a plurality of neighboring nodes, and forming a link with the target node through the agent node; and

a transmitting/receiving unit receiving a message from a plurality of neighboring nodes and transmitting the message to the neighboring node managing unit.

14. The wireless network managing apparatus of claim 13, wherein

the neighboring node managing unit requests link formation to the target node through the agent node and receives information on whether the link formation is permitted from the target node through the agent node.

15. The wireless network managing apparatus of claim 13, wherein

the neighboring node managing unit transmits/receives information on the mesh node and information on the target node through the agent node.

16. The wireless network managing apparatus of claim 15, wherein

the information on the mesh node includes authentication information on the mesh node, and the information on the target node includes authentication information on the target node.

17. The wireless network managing apparatus of claim 13, wherein

the neighboring node managing unit senses an egress node that is out of the transmission range among a plurality of neighboring node, and deletes the link formed with the egress node.

18. The wireless network managing apparatus of claim 17, further comprising

a path managing unit managing a connection including the link to each neighboring node and restoring the connection including the link in a case of deleting the link.

19. The wireless network managing apparatus of claim 18, wherein

the path managing unit sets a substitution path for the connection when the connection including the deleted link exist.

20. The wireless network managing apparatus of claim 19, wherein

the substitution path is set by changing an entire or a portion of end-to-end path of the connection.