Method for reselecting mobile terminal cell

A cell reselection, mobile terminal technology, applied in electrical components, wireless communication and other directions, can solve the problems of frequent system, affecting UE service performance, affecting the normal operation of services, etc.

Active Publication Date: 2011-06-29
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] (2) This processing method will cause the system to frequently perform cell reselection, because when the UE reselects the first cell that meets the reselection conditions, it will detect the existence of subsequent better cells, thereby triggering reselection Reelection occurs
[0013] (3) Since the cell reselected by the UE is not the best cell, subsequent cells that appear better than the reselected cell will cause interference to the UE's initiated service or initiated service on this cell, affecting UE service performance
This method leads to an increase in the reselection delay, and also affects the normal operation of the business in the process

Method used

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Examples

Experimental program
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specific Embodiment 1

[0059] The application scenario of this embodiment is that the UE resides in the serving cell A, and a neighbor cell B that is better than the serving cell is detected in the periodic measurement, and then a cell C with the best stable measurement results appears:

[0060] 1. When the UE detects that the quality of cell B is better than that of A, the UE sets the reselection flag of cell B to 1. At this time, the quality of cell C is worse than A, and the reselection flag of cell C is set to 0;

[0061] 2. The UE starts the reselection timer to monitor cell B, and sets the timing length as Treselection;

[0062] 3. The UE continues to perform periodic measurements. Since the quality of cell B has always been better than that of A, after each measurement, the reselection flag of B is increased by 1;

[0063] At the kth measurement, the UE detects a cell C with better quality than cells A and B, and the UE adds 1 to the reselection flag of C;

[0064] 4. The UE continues to per...

specific Embodiment 2

[0070] The application scenario of this embodiment is that the UE resides in the serving cell A, detects a neighbor cell B that is better than the serving cell in the periodic measurement, and then there is an interfering cell C (cell) whose measurement results fluctuate greatly in a short period of time. C fades before monitoring B's reselection timer expires):

[0071] Steps 1 to 3 of this embodiment are the same as in Example 1;

[0072] 4. The UE continues to perform periodic measurements, and modifies the reselection flags of each cell according to the measurement results;

[0073] Since the signal quality of B and C has always been better than that of A, the reselection flags of B and C are increased by 1 after each measurement;

[0074] At the nth measurement, the UE detects that the signal quality of C is worse than that of A, and the UE sets the reselection flag of C to 0. Since then, since the quality of C has always been worse than that of A, in the subsequent moni...

specific Embodiment 3

[0077] The application scenario of this embodiment is that the UE resides in the serving cell A, detects a neighbor cell B that is better than the serving cell in the periodic measurement, and then there is an interfering cell C (cell) whose measurement results fluctuate greatly in a short period of time. C fades after monitoring B's reselection timer expires):

[0078] Steps 1 to 6 of this embodiment are the same as in Example 1;

[0079] 7. In the nth periodic measurement, the UE detects that the quality of C is worse than that of A, the UE sets the reselection flag of C to 0, and turns off the reselection timer;

[0080] 8. The UE judges that B is the current best cell, and (B's reselection flag-1)×measurement period>Treselection meets the reselection condition. The UE selects cell B, initiates cell reselection, and reselects to reside on B. .

[0081] In this embodiment, the UE also reselects to the best cell B through one reselection, which avoids the occurrence of mult...

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Abstract

The invention discloses a method for reselecting a mobile terminal cell. In the method, user equipment (UE) monitors all cells; when a better cell is detected for the first time, a reselecting timing device is started, and the timing length of the reselecting timing device is set to reselect monitoring time Treselection; a better cell is reselected as a target cell of the reselecting timing device, when the reselecting timing device is closed and the better cell exists, or the reselecting timing device is in an overtime state, the UE judges that if the current best cell meets reselecting conditions, namely, the S of the cell is larger than zero and the R / H value of the cell is the R / H value of a service cell, and the lasting time is larger than or equal to Treselection; and if the best cell meets the reselecting conditions, the UE initiates the reselection of the cell until the best cell is reselected and lingered, otherwise, the UE reselects one better cell as the target cell of the reselecting timing device, the reselecting timing device is restarted so as to continue to monitor all the cells. By the technical scheme in the invention, the best cell can be reselected once when the UE performs cell reselection, thereby reducing reselection time and reducing reselection delay.

Description

technical field [0001] The invention relates to mobile communication terminal technology, in particular to a cell reselection method for a mobile terminal. Background technique [0002] In the third generation mobile communication system, cell reselection is a process closely related to the mobility of a mobile terminal (UE for short). On the one hand, good cell reselection in idle mode can ensure that the UE resides in a cell with stable and better quality to the greatest extent, thereby improving the success rate of UE uplink access; The selection can keenly perceive the changes of the external environment, and ensure that the UE reselects from the current serving cell to a better cell within a certain reselection delay. [0003] Specifically, the UE always calculates the S (used to represent the quality of the cell) of the serving cell and the neighboring cell based on the received signal code power (RSCP for short) measured value of the main common control physical chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/00H04W36/08H04W36/30
Inventor 杨黎明朴虎哲李贵勇
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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