Method and system for keeping conversation of terminal switched from family base station into macro cellular system

A femtocell and macro cell technology, applied in connection management, wireless communication, electrical components, etc., can solve the problems of increased handover failure and call drop, long time, long time to handover to the target MSC, etc., to reduce handover The effect of short time and interruption time

Inactive Publication Date: 2010-09-15
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] From the above method, it can be seen that the process of handing over the HNB to the macro cell in the existing HNB architecture will involve the media update of the remote IMS, because the SCC AS belongs to the home network element of UE-A rather than the visited network element, and UE-B is far away, so it takes a long time to update UE-B's IMS media, and the time-consuming time for UE-B's IMS media update will cause UE-A to hand over to the target MSC. , thus increasing the possibility of handover failure and call drop

Method used

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  • Method and system for keeping conversation of terminal switched from family base station into macro cellular system
  • Method and system for keeping conversation of terminal switched from family base station into macro cellular system
  • Method and system for keeping conversation of terminal switched from family base station into macro cellular system

Examples

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no. 1 example

[0061] Figure 4 It is the HNB system handover flow chart of the first embodiment of the present invention, which describes that UE-A accesses the IMS through the HNB system and has a session, then switches to the CS core network in the macro cellular system, and completes the communication with the remote device The update process of session continuity, for the convenience of description, HNB and HNB-GW are represented as a functional entity in the figure, and CSCF and SCC AS are represented as a functional entity, which does not affect the description of the solution, and the steps are described as follows :

[0062]Step 401, UE-A and UE-B (or other remote devices) are having a session through the IMS connection established by the HNB system. The signaling path of the session uses the SCC AS as the anchor point. During the session establishment process, the SCC AS Inform UE-A of a number and identity, and the SCC AS uses this number and / or identity to identify the occurrenc...

no. 2 example

[0103] Figure 7 It is the HNB system handover flow chart of the second embodiment of the present invention, which describes that UE-A accesses the IMS through the HNB system, and a session occurs, then switches to the macro cell, and then switches to the CS core network in the macro cell system, and The process of updating the session continuity with the remote device is completed. Compared with the first embodiment, the way of establishing the connection between the HNB and the IWF in this embodiment is different. For the convenience of description, the figure shows HNB and HNB-GW as a functional entity, and CSCF and SCC AS as a functional entity, which does not affect the description of the solution. The steps are described as follows:

[0104] Step 701, UE-A and UE-B are conducting a session through the IMS connection established by the HNB system, if the Figure 5 architecture, the signaling path of the session takes the SCC AS as the anchor point. During the session est...

no. 3 example

[0123] Figure 8 It is the HNB system switching flow chart of the third embodiment of the present invention, which describes that UE-A accesses the IMS through the HNB system, and a session occurs, then switches to the macro cell, and then switches to the CS core network in the macro cell system, and Complete the process of updating the session continuity with the remote device. The difference between this embodiment and the second process embodiment is that the way of establishing the connection between the HNB and the IWF is different, and this process embodiment is only based on the second architecture Example. For the convenience of description, HNB and HNB-GW are represented as a functional entity in the figure, which does not affect the description of the solution, and its steps are described as follows:

[0124] Steps 801-802, and Figure 7 Steps 701 to 702 are the same;

[0125] Step 803, the HNB sends a 2G / 3G handover request according to the standard procedure thr...

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Abstract

The invention discloses a method and a system for keeping conversation of a terminal switched from a family base station into a macro cellular system. The terminal carries out IMS (IP Multimedia Subsystem) conversation with a remote device through an HNB (Home Node B) system, the connection of the conversation comprises an IMS media connection M1 between the HNB and the remote device; when the terminal needs to be switched into the micro cellular system, the HNB establishes a connection M2 with an IWF (Internet Watch Foundation) in the HNB system and initiates the switching from a target MSC (Mobile Switching Center) in a CS core network to the micro cellular system through the IWF, the terminal is switched from the family base station into the macro cellular system and establishes a circuit switching connection M3 with the target MSC; and after the switching is finished, an HNB or HNB gateway connects the IMS media connection M1 with the connection M2 to form an access for conversation of the terminal and the remote device through the circuit switching connection M3, the connection M2 and the IMS media connection M1, which can reduce the time of switching the terminal from the family base station into the macro cellular system and ensure that the media stream interruption time is short.

Description

technical field [0001] The present invention relates to the field of communication, in particular to a method and system for maintaining a session when a user terminal under a home base station is handed over to a macro cellular system. Background technique [0002] Home NodeB (HNB: Home NodeB) is a micro-cell access method proposed by the 3rd Generation Partnership Project (3GPP), which is deployed in buildings and other places where macro-cell signals are difficult to reach. cover. [0003] In the HNB architecture, HNB accesses 2G / 3G circuit switching (CS: Circuit Switch) network, 2G / 3G packet switching (PS: Packet Switch) network and IP (Internet Protocol, IP for short) multimedia subsystem (IP Multimedia Core Network Subsystem, IMS for short), so as to provide various business services for users, and the HNB and HNB-GW can be called the HNB subsystem. The main functional entity of the 2G / 3G network is a Mobile Switch Center Server (Mobile Switch Center Server, wherein ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/12H04W36/18H04W76/02
CPCH04W36/04
Inventor 谢振华郝振武
Owner ZTE CORP
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