Method, System and Device for Controlling Handover of User Terminal Device

• US 20120307796A1
• Filed: 07/27/2012
• Published: 12/06/2012
• Est. Priority Date: 01/29/2010
• Status: Active Grant

• Current Assignee: Datang Mobile Communications Equipment Company Limited (China Information Communication Technology Group Co. Ltd.)
• Original Assignee: China Academy of Telecom Technology (China Information Communication Technology Group Co. Ltd.)
• Inventors: WANG, Ying, LIU, Aijuan
• Granted Patent: US 8,588,182 B2
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04W 36/0005 Control or signalling for completing the hand-off
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

Embodiments of the invention provide a method and system for controlling handover of a user terminal device.

Claims

1. A method for controlling handover of a user terminal device, comprising:

receiving, by a Home Evolved NodeB Gateway (HeNB GW), a handover request of a User Equipment (UE), on which handover needs to be performed, sent from a source eNB, converting the handover request into a handover request which satisfies an interface form between the HeNB GW and a target eNB, and sending the converted handover request to the target eNB;

receiving, by the HeNB GW, a handover request acknowledgement message sent from the target eNB if the target eNB permits the UE to access; and

receiving, by the HeNB GW, the handover request acknowledgement message sent from the target eNB, converting the handover request acknowledgement message into a handover request acknowledgement message which satisfies an interface form between the source eNB and the HeNB GW, and sending the converted handover request acknowledgement message to the source eNB.

2. The handover method of claim 1, wherein when the source eNB is a Macro-eNB and the target eNB is the HeNB,

receiving, by the HeNB GW, the handover request of the User Equipment (UE), on which the handover needs to be performed, sent from the source eNB, converting the handover request into the handover request which satisfies the interface form between the HeNB GW and the target eNB, sending the converted handover request to the target eNB comprises:

receiving, by the HeNB GW, an X2 AP handover request message of the UE sent from the Macro-eNB, constructing an S1 AP handover request message according to the X2 AP handover request message, and sending the S1 AP handover request message to the HeNB;

wherein

receiving, by the HeNB GW, the handover request acknowledgement message sent from the target eNB if the target eNB permits the UE to access comprises;

receiving, by the HeNB GW, an S1 AP handover request ack message sent from the HeNBif the HeNB permits the UE to access; and

wherein

receiving, by the HeNB GW, the handover request acknowledgement message sent from the target eNB, converting the handover request acknowledgement message into the handover request acknowledgement message which satisfies the interface form between the source eNB and the HeNB GW, and sending the converted handover request acknowledgement message to the source eNB comprises;

receiving, by the HeNB GW, the S1 AP handover request ack message sent from the HeNB, constructing an X2 AP handover request ack message according to the S1 AP handover request ack message, and sending the X2 AP handover request ack message to the Macro-eNB.

3. The handover method of claim 2, if the HeNB is a HeNB of a mixed-mode, wherein the X2 AP handover request message of the UE, on which the handover needs to be performed, sent from the Macro-eNB carries UE membership of the UE in the HeNB.

4. The method of claim 1, wherein when the source eNB is the HeNB and the target eNB is a Macro-eNB, receiving, by the HeNB GW, the handover request of the User Equipment (UE), on which the handover needs to be performed, sent from the source eNB, converting the handover request into the handover request which satisfies the interface form between the HeNB GW and the target eNB, and sending the converted handover request to the target eNB comprises:

receiving, by the HeNB GW, an S1 AP handover required message of the UE sent from the HeNB, constructing an X2 AP handover request message according to the S1 AP handover required message and a stored UE context of the HeNB, and sending the X2 AP handover request message to the Macro-eNB;

wherein

receiving, by the HeNB GW, a handover request acknowledgement message sent from the target eNB if the target eNB permits the UE to access comprises;

receiving, by the HeNB GW, an X2 AP handover request ack message sent from the Macro-eNB if the Macro-eNB permits the UE to access;

wherein

receiving, by the HeNB GW, the handover request acknowledgement message sent from the target eNB, converting the handover request acknowledgement message into the handover request acknowledgement message which satisfies the interface form between the source eNB and the HeNB GW, and sending the converted handover request acknowledgement message to the source eNB comprises;

receiving, by the HeNB GW, the X2 AP handover request ack message sent from the Macro-eNB, constructing an S1 AP handover command message according to the X2 AP handover request ack message, and sending the S1 AP handover command message to the HeNB.

5. The handover method of claim 4, further comprising:

obtaining, by the HeNB GW, the UE context of the HeNB from a Mobility Management Entity (MME) using a new S1 AP process if the HeNB GW does not comprises the UE context of the HeNB.

6. The handover method of claim 5, wherein the new S1 AP process comprises:

sending, by the HeNB GW, a requesting message for obtaining the UE context of the HeNB to the MME, the requesting message carrying MME UE S1 AP ID and eNB UE S1 AP ID of the UE; and

sending, by the MME, a response message to the HeNB according to the requesting message, wherein the response message carrying the MME UE S1 AP ID, eNB UE S1 AP ID and the UE context.

7. The handover method of claim 2, further comprising:

receiving, by the HeNB GW, an X2 setup request message sent from the Macro-eNB; and

sending, by the HeNB GW, an X2 setup response message to the Macro-eNB.

8. The handover method of claim 4, further comprising:

receiving, by the HeNB GW, an X2 setup request message sent from the Macro-eNB; and

sending, by the HeNB GW, an X2 setup response message to the Macro-eNB.

9. A system for controlling handover of a user terminal device, comprising:

a source eNB, a Home Evolved NodeB Gateway (HeNB GW) and a target eNB;

wherein

the source eNB is configured to send a handover request of a UE, on which handover needs to be performed, to the HeNB GW and receive a handover request acknowledgement message sent from the HeNB GW;

the HeNB GW is configured to receive the handover request of the UE sent from the source eNB, convert the handover request into a handover request which satisfies an interface form between the HeNB GW and the target eNB, send the converted the handover request to the target eNB, and receive the handover request acknowledgement message sent from the target eNB, convert the handover request acknowledgement message into a handover request acknowledgement message which satisfies an interface form between the source eNB and the HeNB GW, and send the converted the handover request acknowledgement message to the source eNB; and

the target eNB is configured to receive the handover request which satisfies the interface form between the HeNB GW and the target eNB sent from the HeNB GW, and send the handover request acknowledgement message to the HeNB GW if the target eNB permits the UE to access.

10. The handover system of claim 9, wherein when the target eNB is a HeNB in a mixed-mode, the handover request message of the UE sent from the source eNB carries UE membership of the UE in the HeNB.

11. The handover system of claim 9, wherein when the source eNB is a Macro-eNB, the HeNB GW is further configured to construct the handover request which satisfies the interface form between the HeNB GW and the target eNB according to the handover request of the UE sent from the Macro-eNB;

when the source eNB is the HeNB, the HeNB GW is further configured to construct the handover request which satisfies the interface form between the HeNB GW and the target eNB according to the handover request of the UE sent from the HeNB and a UE context of the HeNB.

12. The handover system of claim 11, further comprising a Mobility Management Entity (MME), wherein

the MME is configured to receive a requesting message for obtaining the UE context of the HeNB sent from the HeNB GW, and send the UE context of the HeNB to the HeNB GW.

13. A Home Evolved NodeB Gateway (HeNB GW), comprising a receiving module, a constructing module and a sending module;

wherein

the receiving module is configured to receive a handover request of a UE, on which handover needs to be performed sent from a source eNB, and a handover request acknowledgement message sent from a target eNB;

the constructing module is configured to construct a handover request which satisfies an interface form between the HeNB GW and the target eNB according to the handover request of the UE sent from the source eNB, and construct a handover request acknowledgement message which satisfies an interface form between the source eNB and the HeNB GW according to the handover request acknowledgement message sent from the target eNB; and

the sending module is configured to send the handover request which satisfies the interface form between the HeNB GW and the target eNB to the target eNB, and send the handover request acknowledgement message which satisfies the interface form between the source eNB and the HeNB GW to the source eNB.