Apparatus and method of user equipment relocation
First Claim
1. A method for relocating User Equipment (UE) by a Home Node B Gateway (HNB GW) in a communication system, the method comprising:
- receiving a Radio Access Network Application Part (RANAP) Relocation Request message from a Source Home Node B (S-HNB);
transmitting the RANAP Relocation Request message to a target HNB (T-HNB);
receiving a RANAP Relocation Request Acknowledge message from the T-HNB;
constructing a RANAP Relocation Command message and transmitting the constructed RANAP Relocation Command message to the S-HNB;
receiving a RANAP Relocation Complete message from the T-HNB; and
constructing, by the HNB GW, a RANAP Iu Release Command message and transmitting the constructed RANAP Iu Release Command message to the S-HNB,wherein both the S-HNB and the T-HNB are directly connected to the HNB GW.
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Abstract
A method for relocating User Equipment (UE). The method includes a Source Home Node B (S-HNB) sending a Radio Access Network Application Part (RANAP) Relocation Required message and a RANAP Relocation Request message encapsulated in a RANAP User Adaptation (RUA) Direct Transfer message to an HNB gateway (HNB GW). The method also includes the HNB GW sending the RANAP Relocation Request message encapsulated in a RUA Direct Transfer message or in a RUA Connection message to a target HNB (T-HNB). The relocation method may have several advantages. For example, the HNB GW is not required to store a large amount of UE Context, thereby reducing the burden of the HNB GW. The interaction with the CN is decreased, thereby reducing the burden of the CN. The HNB GW is not required to construct RANAP relocation messages, thereby reducing the complexity of the HNB GW.
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Citations
20 Claims
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1. A method for relocating User Equipment (UE) by a Home Node B Gateway (HNB GW) in a communication system, the method comprising:
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receiving a Radio Access Network Application Part (RANAP) Relocation Request message from a Source Home Node B (S-HNB); transmitting the RANAP Relocation Request message to a target HNB (T-HNB); receiving a RANAP Relocation Request Acknowledge message from the T-HNB; constructing a RANAP Relocation Command message and transmitting the constructed RANAP Relocation Command message to the S-HNB; receiving a RANAP Relocation Complete message from the T-HNB; and constructing, by the HNB GW, a RANAP Iu Release Command message and transmitting the constructed RANAP Iu Release Command message to the S-HNB, wherein both the S-HNB and the T-HNB are directly connected to the HNB GW. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for relocating User Equipment (UE) by a Home Node B Gateway (HNB GW) in a communication system when the UE is in a Cell forward Access Channel (Cell_FACH) state, the method comprising:
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receiving a first UE Signaling Transfer message from a target Home Node B (T-HNB); transmitting a Cell Update message and a second UE Signaling Transfer message to a Source HNB (S-HNB), the second UE Signaling Transfer message comprising a Location Area Identity (LAI) of a target cell where the UE is, a Route Area Code (RAC), a cell identity of the target cell, and a Closed Subscriber Group (CSG) identity of the target cell; and receiving at least one of a Radio Access Network Application Part (RANAP) Relocation Required message and a RANAP Relocation Request message from the S-HNB. - View Dependent Claims (8, 9, 10)
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11. A Home Node B Gateway (HNB GW) configured to relocate User Equipment (UE) in a communication system, the HNB GW comprising:
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a receiver configured to; receive a Radio Access Network Application Part (RANAP) Relocation Request message from a Source Home Node B (S-HNB), receive a RANAP Relocation Request Acknowledge message from a target HNB (T-HNB), and receive a RANAP Relocation Complete message from the T-HNB; a transmitter configured to transmit the RANAP Relocation Request message to the T-HNB, transmit a RANAP Relocation Command message to the S-HNB, and transmit a RANAP Iu Release Command message to the S-HNB; and a controller configured to construct the RANAP Relocation Command message and construct the RANAP Iu Release Command message, wherein both the S-HNB and the T-HNB are directly connected to the HNB GW. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A Home Node B Gateway (HNB GW) configured to relocate User Equipment (UE) in a communication system when the UE is in a Cell forward Access Channel (Cell_FACH) state, the HNB GW comprising:
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a receiver configured to receive a first UE Signaling Transfer message from a target Home Node B (T-HNB), and receive at least one of;
a Radio Access Network Application Part (RANAP) Relocation Required message and a RANAP Relocation Request message from a Source HNB;a transmitter configured to transmit a Cell Update message and a second UE Signaling Transfer message to the S-HNB, the second UE Signaling Transfer message comprising a Location Area Identity (LAI) of a target cell where the UE is, a Route Area Code (RAC), a cell identity of the target cell, and a Closed Subscriber Group (CSG) identity of the target cell; and a controller configured to initiate the relocation procedure of the UE by receiving at least one of;
the RANAP Relocation Required message and the RANAP Relocation Request message. - View Dependent Claims (18, 19, 20)
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Specification