Method and system for handling a mobile endpoint in a wireless network

• US 7,782,824 B2
• Filed: 07/20/2006
• Issued: 08/24/2010
• Est. Priority Date: 07/20/2006
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Iyer, Jayaraman R., Oswal, Anand K.
• Primary Examiner(s): Nguyen; David Q
• Application Number:
  US11/458,795
• Publication Number:
  US 20080019332A1
• Time in Patent Office: 1,496 Days
• Field of Search: 370/338, 455/442, 455/552.1, 455/437
• US Class Current: 370/338
• CPC Class Codes: H04L 45/16 Multipoint routing
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 40/36 due to handover
• CPC Class Codes: H04W 76/20 Manipulation of established connections

Abstract

A method of handling a mobile endpoint in a wireless network includes routing data for a mobile endpoint through a first base station. The mobile endpoint is wirelessly connected to the first base station and has a first signal strength at the first base station. The method also includes routing data for the mobile endpoint through the first base station and a second base station. The mobile endpoint is wirelessly connected to the first base station and has a second signal strength at the second base station. The second signal strength is above a first level. The method also includes routing data for the mobile endpoint through the second base station. The mobile endpoint is wirelessly connected to the second base station and has a third signal strength at the second base station. The third signal strength is above a second level.

Claims

1. A method for handling a mobile endpoint in a wireless network, comprising:

routing data for a mobile endpoint through a first base station, the mobile endpoint wirelessly connected to the first base station and having a first signal strength at the first base station;

prior to connection of the mobile endpoint to a second base station, routing data for the mobile endpoint through the first base station and the second base station, the mobile endpoint wirelessly connected to the first base station and having a second signal strength at the second base station, the second signal strength being above a first level; and

routing data for the mobile endpoint through the second base station, the mobile endpoint wirelessly connected to the second base station and having a third signal strength at the second base station, the third signal strength being above a second level.

2. The method of claim 1, wherein routing data for the mobile endpoint through the first base station and the second base station comprises multicasting data for the mobile endpoint to the first base station and the second base station.

3. The method of claim 1, wherein routing data for the mobile endpoint through the first base station and the second base station comprises routing data for the mobile endpoint through the first base station and the second base station upon satisfying a condition of a policy.

4. The method of claim 3, wherein the condition of the policy comprises a condition selected from the group consisting of a user profile associated with a user of the mobile endpoint, a data type of the data for the mobile endpoint, a hardware type for the first base station, the second base station or the mobile endpoint, and the load on the hardware type.

5. The method of claim 1, further comprising buffering the data for the mobile endpoint at the second base station while the mobile endpoint is connected to the first base station.

6. The method of claim 1:

further comprising enabling a sequence number in the data for the mobile endpoint, the data comprising data packets, each data packet numbered with a sequence number; and

wherein routing data for the mobile endpoint through the second base station comprises;

determining the sequence number of the last data packet successfully routed to the mobile endpoint through the first base station; and

sending data packets to the mobile endpoint through the second base station, the data packets having sequence numbers greater than the sequence number of the last data packet successfully routed to the mobile endpoint through the first base station.

7. A method for handling a mobile endpoint in a wireless network, comprising:

detecting a mobile endpoint having a signal strength;

upon the signal strength exceeding a first threshold, receiving data for the mobile endpoint, the data for the mobile endpoint also sent to a first base station, the first base station sending the data to the mobile endpoint via a first wireless connection; and

upon the signal strength exceeding a second threshold;

establishing a second wireless connection with the mobile endpoint, the second wireless connection with the mobile endpoint terminating the first wireless connection between the mobile endpoint and the first base station; and

sending the data to the mobile endpoint via the second wireless connection.

8. The method of claim 7, wherein receiving data for the mobile endpoint, the data for the mobile endpoint also sent to a first base station, comprises receiving multicasted data for the mobile endpoint, the multicasted data for the mobile endpoint also sent to the first base station.

9. The method of claim 7, further comprising, prior to receiving data for the mobile endpoint, satisfying a condition of a policy.

10. The method of claim 9, wherein the condition of the policy comprises a condition selected from the group consisting of a user profile associated with a user of the mobile endpoint, a data type of the data for the mobile endpoint, a hardware type for the first base station, the second base station or the mobile endpoint, and the load on the hardware type.

11. The method of claim 7, further comprising buffering the data for the mobile endpoint.

12. The method of claim 7, wherein:

the data for the mobile endpoint comprises data packets, each data packet numbered with a sequence number, for the mobile endpoint; and

sending the data to the mobile endpoint via the second wireless connection comprises;

determining the sequence number of the last data packet successfully sent to the mobile endpoint by the first base station via the first wireless connection; and

sending data packets to the mobile endpoint, the data packets having sequence numbers greater than the sequence number of the last data packet successfully sent to the mobile endpoint by the first base station via the first wireless connection.

13. A system for handling a mobile endpoint in a wireless network, comprising:

a gateway coupled to a plurality of base stations, the gateway operable to;

route data for a mobile endpoint through a first base station of the plurality of base stations, the mobile endpoint wirelessly connected to the first base station and having a first signal strength at the first base station;

prior to connection of the mobile endpoint to a second base station of the plurality of base stations, route data for the mobile endpoint through the first base station and the second base station of the plurality of base stations, the mobile endpoint wirelessly connected to the first base station and having a second signal strength at the second base station, the second signal strength being above a first level; and

route data for the mobile endpoint through the second base station, the mobile endpoint wirelessly connected to the second base station and having a third signal strength at the second base station, the third signal strength being above a second level.

14. The system of claim 13, wherein the gateway operable to route data for the mobile endpoint through the first base station and the second base station comprises a gateway operable to multicast data for the mobile endpoint to the first base station and the second base station.

15. The system of claim 13, wherein the gateway operable to route data for the mobile endpoint through the first base station and the second base station comprises a gateway operable to route data for the mobile endpoint through the first base station and the second base station upon satisfying a condition of a policy.

16. The system of claim 15, wherein the condition of the policy comprises a condition selected from the group consisting of a user profile associated with a user of the mobile endpoint, a data type of the data for the mobile endpoint, a hardware type for the first base station, the second base station or the mobile endpoint, and the load on the hardware type.

17. The system of claim 13, wherein the second base station is operable to buffer the data for the mobile endpoint while the mobile endpoint is connected to the first base station.

18. The system of claim 13:

wherein the gateway is further operable to enable a sequence number in the data for the mobile endpoint, the data comprising data packets, each data packet numbered with a sequence number; and

wherein the gateway operable to route data for the mobile endpoint through the second base station comprises a gateway operable to;

determine the sequence number of the last data packet successfully routed to the mobile endpoint through the first base station; and

send data packets to the mobile endpoint through the second base station, the data packets having sequence numbers greater than the sequence number of the last data packet successfully routed to the mobile endpoint through the first base station.

19. A system for handling a mobile endpoint in a wireless network, comprising:

an interface operable to;

detect a mobile endpoint having a signal strength; and

upon the signal strength exceeding a first threshold, receive data for the mobile endpoint, the data for the mobile endpoint also sent to a first base station, the first base station operable to send the data to the mobile endpoint via a first wireless connection; and

a processor coupled to the interface and operable to, upon the signal strength exceeding a second threshold establish a second wireless connection with the mobile endpoint, the second wireless connection with the mobile endpoint terminating the first wireless connection between the mobile endpoint and the first base station, and wherein the interface is further operable to send the data to the mobile endpoint via the second wireless connection.

20. The system of claim 19, wherein the interface operable to receive data for the mobile endpoint, the data for the mobile endpoint also sent to a first base station, comprises an interface operable to receive multicasted data for the mobile endpoint, the multicasted data for the mobile endpoint also sent to the first base station.

21. The system of claim 19, wherein the processor is further operable to, prior to receiving data for the mobile endpoint, determine that a condition of a policy is satisfied.

22. The system of claim 21, wherein the condition of the policy comprises a condition selected from the group consisting of a user profile associated with a user of the mobile endpoint, a data type of the data for the mobile endpoint, a hardware type for the first base station, the second base station or the mobile endpoint, and the load on the hardware type.

23. The system of claim 19, further comprising a memory module operable to buffer the data for the mobile endpoint.

24. The system of claim 19, wherein:

the data for the mobile endpoint comprises data packets, each data packet numbered with a sequence number, for the mobile endpoint;

the processor is further operable to determine the sequence number of the last data packet successfully sent to the mobile endpoint by the first base station via the first wireless connection; and

the interface operable to send the data to the mobile endpoint via the second wireless connection comprises an interface operable to send data packets to the mobile endpoint, the data packets having sequence numbers greater than the sequence number of the last data packet successfully sent to the mobile endpoint by the first base station via the first wireless connection.

25. A tangible computer readable storage medium comprising executable code that when executed by a processor is operable to:

route data for a mobile endpoint through a first base station, the mobile endpoint wirelessly connected to the first base station and having a first signal strength at the first base station;

prior to connection of the mobile endpoint to a second base station, route data for the mobile endpoint through the first base station and the second base station, the mobile endpoint wirelessly connected to the first base station and having a second signal strength at the second base station, the second signal strength being above a first level; and

route data for the mobile endpoint through the second base station, the mobile endpoint wirelessly connected to the second base station and having a third signal strength at the second base station, the third signal strength being above a second level.

26. The medium of claim 25, wherein the code operable to route data for the mobile endpoint through the first base station and the second base station comprises code operable to multicast data for the mobile endpoint to the first base station and the second base station.

27. The medium of claim 25, wherein the code operable to route data for the mobile endpoint through the first base station and the second base station comprises code operable to route data for the mobile endpoint through the first base station and the second base station upon satisfying a condition of a policy.

28. The medium of claim 27, wherein the condition of the policy comprises a condition selected from the group consisting of a user profile associated with a user of the mobile endpoint, a data type of the data for the mobile endpoint, a hardware type for the first base station, the second base station or the mobile endpoint, and the load on the hardware type.

29. The medium of claim 25, wherein the code is further operable to buffer the data for the mobile endpoint at the second base station while the mobile endpoint is connected to the first base station.

30. The medium of claim 25:

wherein the code is further operable to enable a sequence number in the data for the mobile endpoint, the data comprising data packets, each data packet numbered with a sequence number; and

wherein the code operable to route data for the mobile endpoint through the second base station comprises code operable to;

determine the sequence number of the last data packet successfully routed to the mobile endpoint through the first base station; and

send data packets to the mobile endpoint through the second base station, the data packets having sequence numbers greater than the sequence number of the last data packet successfully routed to the mobile endpoint through the first base station.

31. A tangible computer readable storage medium comprising executable code that when executed by a processor is operable to:

detect a mobile endpoint having a signal strength;

upon the signal strength exceeding a first threshold, receive data for the mobile endpoint, the data for the mobile endpoint also sent to a first base station, the first base station sending the data to the mobile endpoint via a first wireless connection; and

upon the signal strength exceeding a second threshold;

establish a second wireless connection with the mobile endpoint, the second wireless connection with the mobile endpoint terminating the first wireless connection between the mobile endpoint and the first base station; and

send the data to the mobile endpoint via the second wireless connection.

32. The medium of claim 31, wherein the code operable to receive data for the mobile endpoint, the data for the mobile endpoint also sent to a first base station comprises code operable to receive multicasted data for the mobile endpoint, the multicasted data for the mobile endpoint also sent to a first base station.

33. The medium of claim 31, wherein the code is further operable to, prior to receiving data for the mobile endpoint, determine that a condition of a policy is satisfied.

34. The medium of claim 33, wherein the condition of the policy comprises a condition selected from the group consisting of a user profile associated with a user of the mobile endpoint, a data type of the data for the mobile endpoint, a hardware type for the first base station, the second base station or the mobile endpoint, and the load on the hardware type.

35. The medium of claim 31, wherein the code is further operable to buffer the data for the mobile endpoint.

36. The medium of claim 31, wherein:

the data for the mobile endpoint comprises data packets, each data packet numbered with a sequence number, for the mobile endpoint; and

the code operable to send the data to the mobile endpoint via the second wireless connection comprises code operable to;

determine the sequence number of the last data packet successfully sent to the mobile endpoint by the first base station via the first wireless connection; and

send data packets to the mobile endpoint having sequence numbers greater than the sequence number of the last data packet successfully sent to the mobile endpoint by the first base station via the first wireless connection.

37. A system for handling a mobile endpoint in a wireless network, comprising:

means for routing data for a mobile endpoint through a first base station, the mobile endpoint wirelessly connected to the first base station and having a first signal strength at the first base station;

means for, prior to connection of the mobile endpoint to a second base station, routing data for the mobile endpoint through the first base station and the second base station, the mobile endpoint wirelessly connected to the first base station and having a second signal strength at the second base station, the second signal strength being above a first level; and

means for routing data for the mobile endpoint through the second base station, the mobile endpoint wirelessly connected to the second base station and having a third signal strength at the second base station, the third signal strength being above a second level.

38. A system for handling a mobile endpoint in a wireless network, comprising:

means for detecting a mobile endpoint having a signal strength;

means for, upon the signal strength exceeding a first threshold, receiving data for the mobile endpoint, the data for the mobile endpoint also sent to a first base station, the first base station sending the data to the mobile endpoint via a first wireless connection; and

means for, upon the signal strength exceeding a second threshold;

establishing a second wireless connection with the mobile endpoint, the second wireless connection with the mobile endpoint terminating the first wireless connection between the mobile endpoint and the first base station; and

sending the data to the mobile endpoint via the second wireless connection.