Gateway apparatus, communication control method, and non-transitory computer readable medium storing communication control program

• US 10,299,170 B2
• Filed: 11/27/2017
• Issued: 05/21/2019
• Est. Priority Date: 04/20/2009
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Kawaguchi, Kenji
• Primary Examiner(s): Chu, Wutchung
• Application Number:
  US15/822,409
• Publication Number:
  US 20180077611A1
• Time in Patent Office: 540 Days
• Field of Search: 455436, 455437, 455438, 455439, 455440, 455442, 455443, 455449, 455456, 370310, 370331, 370332, 370401
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 36/0011 for data sessions of end-to-end connection
• CPC Class Codes: H04W 36/10 Reselecting an access point controller
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

A source Home Node B (HNB) of a mobile communication system transmits, to a Home Node B-Gateway (HNB-GW) of the mobile communication system, a Direct Transfer message including a Target Radio Network Controller (RNC)-ID and a Target Cell ID. A mobile station receives a channel reconfiguration message from the source HNB, synchronizes with the target HNB, and transmits a channel reconfiguration complete message to the target HNB. The HNB-GW constructs a RANAP relocation request message using the Target RNC-ID. The HNB-GW transmits the RANAP relocation request message to the target HNB, and detects a relocation from the source HNB to the target HNB, after receiving the Direct Transfer message from the source HNB.

Claims

1. A method of Home Node B-Gateway (HNB-GW), comprising:

receiving, from a source Home Node B (HNB), a first Radio Access Network Application Part (RANAP) relocation message including parameters, the parameters comprising a Target Radio Network Controller (RNC) ID and a Target Cell ID,

constructing a second RANAP relocation message using the parameters,

determining a target HNB, and

transmitting the second RANAP relocation message to the target HNB,

the Target RNC ID received from the source HNB being same as a RNC ID allocated to the HNB-GW and,

the HNB-GW being identified towards a core network (CN) by the RNC ID and connected to the CN, the source HNB and the target HNB.

2. The method according to claim 1, further comprising:

receiving a third RANAP relocation message being an acknowledge (ACK) message of the second RANAP relocation message from the target HNB and

transmitting, to the source HNB, a fourth RANAP relocation message being a RANAP relocation command message, without transmitting the third RANAP relocation message to the CN.

3. The method according to claim 1, further comprising:

receiving from the source HNB a RANAP Iu Release Complete message.

4. The method according to claim 1, wherein

the first RANAP relocation message is a RANAP relocation required message and the HNB-GW transmits the RANAP relocation required message to the CN if the Target RNC ID received from the source HNB is different from the RNC ID allocated to the HNB-GW.

5. A Home Node B-Gateway (HNB-GW), comprising:

a receiver configured to receive, from a source Home Node B (HNB), a first Radio Access Network Application Part (RANAP) relocation message including parameters, the parameters comprising a Target Radio Network Controller (RNC) ID and a Target Cell ID,

a controller configured to construct a second RANAP relocation message using the parameters and determine a target HNB, and

a transmitter configured to transmit the second RANAP relocation message to the target HNB,

the Target RNC ID received from the source HNB being same as a RNC ID allocated to the HNB-GW and,

the HNB-GW being identified towards a core network (CN) by the RNC ID and connected to the CN, the source HNB and the target HNB.

6. The HNB-GW according to claim 5, wherein

the receiver receives a third RANAP relocation message being an acknowledge (ACK) message of the second RANAP relocation message from the target HNB and

the transmitter transmits, to the source HNB, a fourth RANAP relocation message being a RANAP relocation command message, without transmitting the third RANAP relocation message to the CN.

7. The HNB-GW according to claim 5, wherein

the receiver receives from the source HNB a RANAP Iu Release Complete message.

8. The HNB-GW according to claim 5, wherein

the first RANAP relocation message is a RANAP relocation required message and the HNB-GW transmits the RANAP relocation required message to the CN if the Target RNC ID received from the source HNB is different from the RNC ID allocated to the HNB-GW.

9. A mobile communication system comprising:

a source HNB configured to transmit, to the HNB-GW, a first Radio Access Network Application Part (RANAP) relocation message including parameters, the parameters comprising a Target Radio Network Controller (RNC) ID and a Target Cell ID,

a HNB-GW configured to construct a second RANAP relocation message using the parameters, determine a target HNB, and transmit the second RANAP relocation message to the target HNB,

a target HNB configured to receive the second RANAP relocation message,

the Target RNC ID received from the source HNB being same as a RNC ID allocated to the HNB-GW and,

the HNB-GW being identified towards a core network (CN) by the RNC ID and connected to the CN, the source HNB and the target HNB.

10. The mobile communication system according to claim 9, wherein

the HNB-GW receives a third RANAP relocation message being an acknowledge (ACK) message of the second RANAP relocation message from the target HNB, and transmits, to the source HNB, a fourth RANAP relocation message being a RANAP relocation command message, without transmitting the third RANAP relocation message to the CN.

11. The mobile communication system according to claim 9, wherein

the HNB-GW receives from the source HNB a RANAP Iu Release Complete message.

12. The mobile communication system according to claim 9, wherein

the first RANAP relocation message is a RANAP relocation required message and the HNB-GW transmits the RANAP relocation required message to the CN if the Target RNC ID received from the source HNB is different from the RNC ID allocated to the HNB-GW.