Network service control method and agent dispatching method used therein

• US 20070130461A1
• Filed: 01/27/2006
• Published: 06/07/2007
• Est. Priority Date: 12/02/2005
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Lai, Wei-Cheng, Lin, Chen-Hau, Chou, Li-Der
• Granted Patent: US 7,664,500 B2
• Time in Patent Office: Days
• US Class Current: 713/168
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 12/63 Location-dependent; Proximity-dependent
• CPC Class Codes: H04W 36/0038 of security context information
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: H04W 88/182 Network node acting on behalf of an other network entity, e.g. proxy

Abstract

A network service control method detects whether a mobile node communicating with a corresponding node is trending to a second local area network from a first local area network and forks and transmits a user agent and a server agent to a proxy when the mobile node is trending to the second local area network. After that, the user agent registers onto the proxy according to a result obtained by the handshaking. Finally, when the mobile node moves into the second local area network, the mobile node communicates with the user agent for obtaining a connection tunnel reserved by the user agent to communicate with the corresponding node.

Claims

1. A network service control method, which is adapted to a network with at least one server to store authentication data for authorization process of a mobile node, comprising:

forking and transmitting an user agent to a proxy when the mobile node is trending from a first local area network to a second local area network and the proxy controlling network connection of the second local area network does not have agents for the mobile node;

forking and transmitting a server agent to the proxy when the mobile node is trending to the second local area network and the proxy does not have agents for the server;

the user agent handshakes with the server via the server agent;

the user agent registers onto the proxy according to a result obtained by the handshaking; and

when the mobile node moves into the second local area network, the mobile node communicates with the user agent for obtaining a connection tunnel reserved by the user agent to communicate with the corresponding node.

2. The network service control method according to claim 1 further comprising:

determining whether status of each agent is greater than or equals to a first threshold or less than a second threshold when the proxy has agents therein;

forking a sub agent for sharing operation of one of the agents when the status of the one of the agents is greater than or equals to the first threshold; and

merging one of the agents with another agent when the status of the one of the agents is less than the second threshold.

3. The network service control method according to claim 2, wherein status of the agents includes loading of one of the agents.

4. The network service control method according to claim 2, wherein status of the agents includes connection quantity of one of the agents.

5. The network service control method according to claim 1, further comprising:

detecting whether the mobile node is trending to the second local area network.

6. The network service control method according to claim 5, wherein detecting whether the mobile node is trending to the second local area network comprises:

detecting intensities of RSSI_p signals;

classifying the RSSI_p signals;

finding out a new RSSI_p signal whose intensity is greater than intensity of any other RSSIp signals being not used for the first local area network;

determining whether intensity of a current RSSI_p signal, which is one of the RSSI_p signals used for the first local area network, is less than a first intensity threshold;

determining whether intensity of the new RSSI_p signal is greater than a second intensity threshold; and

when both determinations are true, local area network uses the new RSSI_p signal set as the second local area network and the mobile node is determined as trending to the second local area network.

7. The network service control method according to claim 1 further comprising:

checking whether the mobile node is a member of a client group; and

when the mobile node is a member of the client group and a first user agent for a member of the client group exists in the proxy, the first user agent is used as a group user agent for simultaneously handling handshaking for the mobile node and other member of the client group.

8. The network service control method according to claim 7 further comprising:

when the proxy has agents, determining whether status of each agent is greater than or equals to a first threshold or less than a second threshold;

when the status of one of the agents is greater than or equals to the first threshold, forking a sub agent for sharing operation of the one of the agents; and

when the status of one of the agents is less than the second threshold, the one of the agents is merged with another agent.

9. The network service control method according to claim 1, wherein the user agent handshakes with the server via the server agent comprises:

the user agent sends an authentication request to the server agent;

the server agent queries a corresponding authentication data from the server; and

obtaining the result from determination of whether the authentication request is valid according to the authentication data.

10. An agent dispatching method for network service control, adapted to dispatch an agent for a mobile node, comprising:

finding out a new RSSI_p signal whose intensity is greater than any other intensities of RSSI_p signals being not used for a first local area network in which the mobile node exists;

determining whether intensity of a current RSSI_p signal, which is used for the first local area network, is less than a first intensity threshold;

determining whether intensity of the new RSSI_p signal is greater than a second intensity threshold; and

when both determinations are true, an agent forked in local area network uses the new RSSI_p signal.

11. The agent dispatching method for network service control according to claim 10 further comprising:

when a local area network has agents, determining whether status of each agent is greater than or equals to a first threshold or less than a second threshold;

when the status of one of the agents is greater than or equals to the first threshold, forking a sub agent for sharing operation of the one of the agents; and

when the status of one of the agents is less than the second threshold, the one of the agents is merged with another agent.

12. The agent dispatching method for network service control according to claim 11, wherein status of the agents includes loading of one of the agents.

13. The agent dispatching method for network service control according to claim 11, wherein status of the agents includes connection quantity of one of the agents.

14. The agent dispatching method for network service control according to claim 10, further comprising:

detecting intensities of RSSI_p signals; and

classifying the RSSI_p signals.