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Switch adjudgement method in TD-SCDMA system

A TD-SCDMA and decision-making technology, applied in electrical components, selection devices, wireless communication, etc., can solve the problems of increasing RNC processing capacity and unfavorable system capacity, so as to reduce the probability of dropped calls, logically reasonable, and high in efficiency Effect

Inactive Publication Date: 2008-01-02
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent uses the UE to periodically report the measurement results, which will lead to excessive message interaction between the UE and the RNC (Raido Network Controller, radio network controller), increasing the processing capacity of the RNC, which is not conducive to improving the capacity of the entire system

Method used

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  • Switch adjudgement method in TD-SCDMA system
  • Switch adjudgement method in TD-SCDMA system

Examples

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Embodiment Construction

[0018] The invention makes full use of the measurement results reported by UE event triggers in the TD-SCDMA system. In the RNC, the events and measurement results reported by the UE are fully controlled and judged, thereby deciding whether handover is necessary.

[0019] In the 3GPP TS 25.331 specification, it is stipulated that in the TD-SCDMA system, UE can choose two ways to report the measurement report: periodic reporting and event-triggered reporting. The prerequisite for using the method of the present invention is that the event-triggered reporting scheme is used in the measurement control command. In addition, the present invention supports multi-carrier frequency coverage in the geographic cell where the UE is located.

[0020] In 3GPP TS 25.331, the events mentioned in the present invention are described as follows:

[0021] (1) Event 2A: The optimal carrier frequency changes, that is, the signal quality of the currently unused carrier frequency is higher than the...

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PUM

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Abstract

This invention discloses a judging-switch method in TD-SCDMA system, using the reported result of UE event trigger to decide whether does switch, which comprises the following steps: 1, initializing the inward switch measure state into between frequency switch measure state, RNC sending measurement control order to UE; 2, if RNC judging the reported event as all between-frequency adjacent areas meeting 2E, switch to in-frequency switch state, turning to step 4, or to step 3; 3, if RNC judging the reported event as 2A / 2B, turning to 5, or to 4; 4, if RNC judging as 1G, switch in frequency, turning to step 5, if judging as 2C or 2D, to 1; 5,receiving, controlling and distributing related source in corresponding aim area, if UE receives successfully, RNC sends switch order to UE, executing the new area turning to step 1, if not, executing the present area turning to step 1.

Description

technical field [0001] The present invention relates to a handover judgment method in a TD-SCDMA (Time Divsion-Synchronous Code Division Multiple Access) system, in particular to the use of UE (User Equipment, User Equipment) in the TD-SCDMA system ) event-triggered reporting results to determine whether switching is necessary. Background technique [0002] In a cellular wireless communication system, a wireless communication coverage area consists of many overlapping cells. When a mobile user moves in this area, it often happens that the mobile user connected to the cell is handed over from one cell to another. [0003] In the third-generation mobile communication system, there is no soft handover in the TD-SCDMA standard, and hard handover is divided into intra-frequency hard handover and inter-frequency hard handover. According to the characteristics of TD-SCDMA, due to its narrow spectrum occupation bandwidth, it is easier for adjacent cells to be equipped with differe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/38H04W36/30
Inventor 向云帆吴本寿张军
Owner ZTE CORP
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