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Switchover object cell selection method in mobile communication system

A technology for a mobile communication system and a target cell, which is applied in the technical field of sorting and selection of target cells in the process of handover, can solve the problems of increasing system interference, unreasonableness, and inability to guarantee user communication quality, and reduce signaling load. , the effect of reducing the switching rate and the system call drop rate

Inactive Publication Date: 2006-09-13
CHINA ACAD OF TELECOMM TECH
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AI Technical Summary

Problems solved by technology

Undoubtedly, this method of target cell selection is unreasonable, will increase the interference in the system, and cannot guarantee the communication quality of users

Method used

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  • Switchover object cell selection method in mobile communication system
  • Switchover object cell selection method in mobile communication system
  • Switchover object cell selection method in mobile communication system

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Embodiment Construction

[0021] The present invention proposes a method of using SFN-SFN (system frame number-system frame number) to observe the time change rate to determine the handover target cell. In the case of multiple target cells, measure the UE (user terminal) observed The change rate of the difference between the system frame number of the user and the system frame number of the neighboring cell (SFN_SFN OTD) is used to judge the mobile user's movement track and movement trend, and to judge the cell that the user may enter to adapt to the user's mobility characteristics, so that the target cell can The selection is more reasonable and accurate, thereby reducing the switching rate and system call drop rate.

[0022] SFN represents the count value of the system frame number of the cell. This value is broadcast on the cell broadcast channel, and the value ranges from 0 to 4095. Each 10ms frame, that is, two subframes, has an SFN number. The SFN numbers used between cells may be synchronous or ...

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Abstract

This invention provides a selecting method for switching target areas based on system frame numbers observation time difference variety rate including: selecting candidate areas meeting switch conditions and listing, testing the system frame number abservation time differences for the candidate areas and reporting them periodically, computing the measured frame observation time difference change rate of the adjacent areas in a period of time at the network side, judging the moving trend of the user terminal and setting the switch priority of the candidate area, selecting the area with the highest priority as the switch target area to switch the terminal to the target area.

Description

technical field [0001] The present invention relates to the handover technology in the field of cellular mobile communication, more precisely, it relates to the sorting and selection technology of target cells in the handover process. Background technique [0002] In the existing mobile communication system handover control method, the mobile station measures parameters such as the reception level and signal quality of the serving cell signal, and the signal level of the adjacent cell. After the network receives the measurement result report of the mobile station, it invokes the handover algorithm. Certain judgment criteria determine that handover is required, and then select at least one neighboring cell as a candidate cell for handover according to the measurement results, and use certain criteria (usually signal strength) to select the final target cell for handover among the candidate cells. There are many existing handover target cell selection methods, mainly based on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04W36/08H04W48/16
Inventor 周德锁赵瑾波
Owner CHINA ACAD OF TELECOMM TECH
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