HANDOVER PROCEDURE

• US 20090168722A1
• Filed: 10/06/2008
• Published: 07/02/2009
• Est. Priority Date: 10/08/2007
• Status: Abandoned Application

• Current Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Original Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Inventors: Zheng, Haihong, Maheshwari, Shashikant, Saifullah, Yousuf
• Application Number:
  US12/246,473
• Publication Number:
  US 20090168722A1
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04W 36/0033 with transfer of context information
• CPC Class Codes: H04W 36/0055 Transmission or use of information for re-establishing the radio link
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection
• CPC Class Codes: H04W 76/00 Connection management

Abstract

Various example embodiments are disclosed. One example embodiment may include determining, by a serving base station in a wireless network, to hand a mobile station over to a target base station. This example may further include receiving a base station-to-base station handover message from the target base station, the base station-to-base station handover message including at least one connection identifier (CID) associated with the target base station. This example may further include sending a base station-to-mobile station handover message to the mobile station based on the determining, the handover message including the at least one CID.

Claims

1. A method comprising:

determining, by a serving base station in a wireless network, to hand a mobile station over to a target base station;

receiving a base station-to-base station handover message from the target base station, the base station-to-base station handover message including at least one connection identifier (CID) associated with the target base station; and

sending a base station-to-mobile station handover message to the mobile station based on the determining, the handover message including the at least one CID.

2. The method of claim 1, wherein the determining includes determining to hand the mobile station over to the target base station based on receiving a handover request from the mobile station.

3. The method of claim 1, further comprising:

receiving a handover request from the mobile station,

wherein the determining includes determining to hand the mobile station over to the target base station based on the receiving the handover request from the mobile station.

4. The method of claim 1, wherein the determining includes determining to hand the mobile station over to the target base station based on a determined distance of the mobile station from the serving base station and the target base station.

5. The method of claim 1, wherein the determining includes determining to hand the mobile station over to the target base station based on a handshake procedure with the target base station.

6. The method of claim 1, wherein the determining includes determining to hand the mobile station over to the target base station based on a handshake procedure with the target base station and a gateway which manages the serving base station and the target base station.

7. The method of claim 1, further comprising:

sending, by the serving base station, a handover request to the target base station;

sending, by the target base station, a scheduling message to the mobile station in response to receiving the handover request from the serving base station; and

receiving, by the target base station, a data packet from the mobile station without receiving a range request from the mobile station, the data packet being received in accordance with the scheduling message and including an authentication code.

8. A method comprising:

receiving, by a target base station in a wireless network, a handover request from a serving base station providing service to a mobile station;

sending a scheduling message to the mobile station in response to receiving the handover request; and

receiving a data packet from the mobile station without receiving a range request from the mobile station, the data packet being received in accordance with the scheduling message and including an authentication code or an encryption code.

9. The method of claim 8, wherein the receiving the handover message includes receiving a handover pre-notification.

10. The method of claim 8, wherein the receiving the handover message includes receiving a handover confirmation.

11. The method of claim 8, wherein the receiving the handover message from the serving base station serving the mobile station includes receiving the handover message from a gateway managing the target base station and the mobile station.

12. The method of claim 8, wherein:

the receiving the data packet includes receiving a first MAC protocol data unit (MPDU) packet.

13. The method of claim 8, wherein the receiving the data packet from the mobile station includes receiving the data packet from the mobile station, the data packet including the authentication code, the authentication code being calculated by encrypting a portion of the data packet.

14. The method of claim 8, wherein the receiving the first data packet from the mobile station includes receiving the data packet from the mobile station, the first data packet including the authentication code, the authentication code being calculated by encrypting a MAC address included in the data packet.

15. The method of claim 8, wherein the receiving the first data packet from the mobile station includes receiving the data packet from the mobile station, the first data packet including the authentication code, the authentication code being calculated by executing a Hash Message Authentication Code on a portion of the data packet.

16. The method of claim 8, wherein the receiving the first data packet from the mobile station includes receiving the data packet from the mobile station, the first data packet including the authentication code, the authentication code being calculated by executing a Ciphered Message Authentication Code on a portion of the data packet.

17. The method of claim 8, further comprising receiving a second data packet from the mobile station, the second data packet including the authentication code.

18. A method comprising:

receiving, at a target base station from a serving base station in a wireless network, a request to use an old connection identifier (CID) for communication with a mobile station, the old CID being owned by a different base station;

determining that communication may be performed between the target base station and the mobile station using the old CID; and

communicating, by the target base station, with the mobile station using the old CID for the mobile station.

19. The method of claim 18, wherein the receiving the request includes receiving, at the target base station from the mobile station, the request to use the old CID for communication with the target base station, the old CID being owned by the different base station, the different base station including the serving base station.

20. The method of claim 18, wherein the determining includes determining that communication may be performed between the target base station and the mobile station using the old CID based on determining that the old CID is not already being used by the target base station.