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Method and network element for controlling handover

A network unit, connection conversion technology, applied in the direction of electrical components, radio/induction link selection arrangement, selection device, etc., can solve the problems of service quality deterioration, waste of available radio resources, etc., to improve network performance and service quality, increase The effect of business probability

Inactive Publication Date: 2004-06-16
NOKIA TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the absence of information about the target cell load, unnecessary IS-HO may be initiated, including compressed mode measurements of mobile terminals for IS-HO from WCDMA systems to GSM systems, causing additional network Capacity consumption, signaling in preparation for IS-HO and additional processing capacity required in different network elements
This leads to a waste of available radio resources if the load within the target cell does not allow IS-HO
Furthermore, IS-HO between highly loaded cells leads to a possible deterioration of the QoS (Quality of Service) of the connected mobile terminals due to the ping-pong effect and the additional and unnecessary risk of releasing said connections

Method used

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  • Method and network element for controlling handover
  • Method and network element for controlling handover
  • Method and network element for controlling handover

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Embodiment Construction

[0039] Preferred embodiments will be described below based on connection switching functionality within a cellular network environment including a GSM system and a WCDMA system.

[0040] figure 1 A schematic block diagram is shown of the connection switching or handover functionality provided within a network element, eg a Base Station Controller (BSC) for a GSM system or a Radio Network Controller (RNC) for a WCDMA system.

[0041] according to figure 1 , a handover control function or unit 20 is provided, which generates the IF-HO and IS-HO based on the information obtained from the load determination function or unit 10 and other specific parameters needed to determine whether to initiate IF-HO or IS-HO signaling. The parameters may include a predetermined threshold value 40 for load-based switching, which may be stored in a corresponding memory or register. The threshold 40 may be set by the operator or set by the switching control unit 20 itself.

[0042] The load det...

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Abstract

The present invention relates to a method and apparatus for controlling a connection transfer in a cellular network having at least two systems, such as a GSM system and a WCDMA system. Based on a load determination, a service-based inter-system or inter-frequency handover of the connection to another system or to another carrier of the same system is initiated if the determined is below a threshold and service priorities are indicating it. If it exceeds the threshold, an additional load-based inter-system or inter-frequency handover can be initiated. If the load of the target cell is not known, a load estimation based on a learning process can be used to derive a probability of success of an interfrequency or inter-system hand-over, which may be used for deciding on the initiation of the inter-system hand-over. The learning process may be performed by evaluating preceding interfrequency or inter-system handovers to the target cell or preceding interfrequency or inter-system handovers from the target cell. Thereby, users can be shared between different radio access technologies or systems or between different carriers of one system to thereby improve network capacity and quality of service for both systems and carriers. Furthermore, unnecessary inter-system handovers can be prevented in case the load of the target cell of the other system is not known.

Description

technical field [0001] The present invention relates to a method and a network element for controlling connection switching within a cellular network having at least two carriers or at least two systems, such as a third generation mobile telecommunication network, comprising WCDMA (Wideband Code Division Multiple Access) system and GSM (Global System for Mobile Communications) within or between them. Background technique [0002] When using the third generation mobile communication technology, different radio access technology systems such as GSM and WCDMA will be available simultaneously. From the viewpoint of a mobile station or terminal capable of multi-system, both systems can be accessed. However, network resources are managed by a different system network. [0003] In general, transferring a user's connection from one radio channel to another within the same or a different radio cell of the same or a different cellular network is called handover. Each network system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/14H04W36/22
CPCH04W36/22
Inventor 厄维·施沃兹哈利·霍尔玛卡尔·泰格斯蒂特艾奇姆·沃克艾特·阿塔莫凯·海金宁
Owner NOKIA TECH OY
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