Method, system and device for switching between APs

A handover request and handover condition technology, applied in transmission systems, digital transmission systems, data exchange networks, etc., can solve the problems of handover failure and inability to use handover procedures, and achieve the effect of reducing the burden

Active Publication Date: 2009-07-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the process of implementing the present invention, the inventors have found that various handover schemes are defined in the current WCDMA network, such as soft handover, hard handover, and hard handover with migration. Mainly hard handover accompanied by migration process, such as image 3 As shown, it is a flow chart of hard handover with migration. The solution of hard handover with migration is currently one of the main methods applicable to AP network handover, but this process is only applicable to different AGs and APs using different RNC-IDs. When handover between APs of the same RNC-ID, the handover process defined in the standard cannot be used, resulting in handover failure

Method used

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  • Method, system and device for switching between APs
  • Method, system and device for switching between APs

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0037] Such as Figure 4 As shown, it is a signaling flow chart of UE switching between AP1 and AP2 using the same RNC-ID in Embodiment 1 of the present invention. When the UE needs to switch from AP1 to AP2, through the switching process in Embodiment 1 of the present invention, After sending the UE parameters (including PS and CS context) on AP1 to AP2, AG adjusts the relevant tunnel path. Since the core network of the entire handover process in Embodiment 1 of the present invention is invisible, when AP1 and AP2 use the same RNC -ID and switchover avoids the problem that the existing core network MSC does not support switching between APs using the same RNC-ID. The specific steps are as follows:

[0038] Step S401: AP1 sends a handover request HandOver Required to AG;

[0039] The handover request carries the UE's PS and CS contexts, and through the handover request, AP1 sends the UE's PS and CS contexts to the AG.

[0040] In addition, after AP1 sends the handover reques...

Embodiment 2

[0068] Such as Figure 5 As shown, it is a flow chart of packaging PS and CS contexts into one signaling message to realize switching between AP1 and AP2 in Embodiment 2 of the present invention. Embodiment 2 of the present invention combines the user's PS and CS context messages into one UE parameter to switch between AP1 and AP2, which reduces the load on the AG to a certain extent and makes the switching process more efficient and stable. The steps are generally the same as those in Embodiment 1, and will not be repeated here.

[0069] In the second embodiment, the user's PS and CS contexts are mainly combined into one signaling for transmission, and the principle of transmission is basically the same as that of the first embodiment. Send it to AP2, and adjust the relevant parameters and tunnel direction on the AG at the same time. The core network of the process in the second embodiment is still invisible, and it can also be switched when the RNC-IDs of AP1 and AP2 are th...

Embodiment 3

[0071] Such as Figure 6 As shown, it is a flow chart of UE switching between AP1 and AP2 disclosed in Embodiment 3 of the present invention under the condition that AP1 and AP2 can communicate with each other. In this embodiment, since the signaling between AP1 and AP2 Can intercommunicate, AP1 can directly send UE parameters (including PS, CS context) to AP2, compared with the previous embodiment, this embodiment enables AG to receive fewer signaling messages, thereby further reducing the load of AG , which also makes the switching process easier and further improves the efficiency.

[0072] The intercommunication between AP1 and AP2 can be performed through the IP network between the APs, or through the Iur interface between the APs.

[0073] Specific steps are as follows:

[0074] Step S601, AP1 directly sends a Handover Request to AP2;

[0075] In step S602, AP2 makes a handover decision, and the specific decision method is generally the same as that of the foregoing e...

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Abstract

The invention discloses a method, a device and a system for handoff in an AP network. The method particularly comprises the followings steps: a source AP sends out a handoff request; a target AP judges that handoff conditions are satisfied according the relevant resource and the context of user equipment (UE) included in the handoff request, the resource is reserved and a transmission link and a wireless link are established, and synchronize with the process of the UE when the reconfiguration of the UE is performed; an up-down link tunnel between AGs is adjusted to be an up-down link tunnel the target APs by AG. By adopting the method, the device and the system, the invention solves the problem that handoff can not be performed between the two APs adopting identical RNC-ID in the prior art, so that the purpose of handoff between the two APs adopting identical RNC-ID is achieved, and meanwhile the burden of a core network is relieved.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method, device and system for switching between APs. Background technique [0002] UMTS (Universal Mobile Telecommunications System, Universal Mobile Communications System) is a 3G (Third generation, third generation) mobile phone technology. UMTS uses W-CDMA (Wireless-Code Division Multiple Access, Code Division Multiple Access) as the underlying standard, and is finalized by 3GPP (Third generation partner plan, Third Generation Partnership Project), representing Europe's ITU IMT-2000 on 3G cellular Response to wireless system needs. [0003] UMTS AP is a newly developed UMTS base station type, which is suitable for small-scale areas such as homes and offices, and mainly solves coverage and capacity issues. UMTS AP can be connected to the operator's network through broadband access to provide various 3G services. [0004] Such as figure 1 Shown is the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/10
CPCH04L12/66H04L12/4633H04W28/26H04W76/022H04W36/0011H04W76/12
Inventor 吴健
Owner HUAWEI TECH CO LTD
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