Method and device used for handoff

A technology of handover and current cell, applied in electrical components, wireless communication, etc.

Active Publication Date: 2010-05-26
BEIJING NUFRONT MOBILE MULTIMEDIA TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0018] In view of this, the technical problem to be solved by the present invention is to provide a method for handover, so that UE can still successfully perform handover in the case of rapid link deterioration

Method used

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  • Method and device used for handoff
  • Method and device used for handoff
  • Method and device used for handoff

Examples

Experimental program
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Embodiment Construction

[0028] figure 2 An optional flow for handover is shown, the method includes:

[0029] In step 201, the UE periodically measures the PCCPCH RSCP of the current cell.

[0030] Step 202: Predict the value of the PCCPCH RSCP of the current cell at a specific time in the future, and obtain the predicted value of the PCCPCH RSCP of the current cell.

[0031] Here, the periodically obtained PCCPCH RSCP measurement values ​​can be considered as discrete time-series signals, and a series of PCCPCH RSCP prediction values ​​can be obtained by using an existing prediction algorithm to perform prediction based on a series of PCCPCH RSCP measurement values. Alternative prediction algorithms are the Kalman filter algorithm or the prediction method based on the minimum mean square error (LMS) criterion. Using Kalman filtering or LMS criteria to predict time series signals is a relatively common technology, and will not be described in detail here.

[0032] Step 203, compare the PCCPCH RSC...

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Abstract

A method used for handoff comprises the following steps: obtaining the signal quality of the current community; starting timing when the signal quality of the current community is lower than the first threshold; setting the timing length according to the variation of the signal quality; and sending the measuring report if the signal quality of the current community is lower than the first threshold all the time in the timing length, wherein the faster the signal quality varies, the shorter the timing length is. Fast signal attenuation is coped with by adjusting the timing threshold of a timer, namely in the switching zone, the received attenuation velocity of the signal quality of the current community is different under the conditions of fast movement and slow movement of UE. UE can be ensured to timely switch to the new base station in any state by correspondingly setting the timing threshold of the timer according to the variation velocity of the signal quality linking UE and the original base station. The invention also discloses a device used for handoff.

Description

technical field [0001] The present invention relates to the technology of handover in the field of mobile communication, in particular to a method and device for handover. Background technique [0002] In a mobile communication system, when a mobile terminal moves from the coverage area of ​​one cell to the coverage area of ​​another cell, communication needs to switch channels to ensure the continuity of mobile user communication. This operation is called handover. Handover mainly includes three processes: handover measurement, handover judgment and handover execution. [0003] In the measurement phase, the mobile terminal (UE) measures the pilot signal strength of the current cell and neighboring cells. The measurement types include intra-frequency measurement and inter-frequency measurement. The measurement methods can be divided into periodic measurement and event-triggered measurement. Periodic measurement is usually used to monitor the quality of the current cell, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/28
Inventor 曾勇波沈超姚惠娟鲍东山
Owner BEIJING NUFRONT MOBILE MULTIMEDIA TECH
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