WO2013104176A1

WO2013104176A1 - Method and system capable of adjusting parameter according to moving speed of terminal

Info

Publication number: WO2013104176A1
Application number: PCT/CN2012/077763
Authority: WO
Inventors: 田炜; 王新台; 武娟
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-01-13
Filing date: 2012-06-28
Publication date: 2013-07-18
Also published as: CN102572989A

Abstract

A method, terminal and system capable of adjusting a parameter according to a moving speed of a terminal. The method comprises: a mobile terminal detecting signal strength of a serving cell and judging a current moving speed according to speed judgment criteria issued by a base station, and adjusting a system parameter according to the moving speed, the system parameter being a cell reselection threshold parameter or a switching trigger duration parameter. By means of the technical solution, accuracy and timeliness of the UE speed judgment are improved, the network switching success rate is improved, and user experience is improved as well.

Description

Method and system for adjusting parameters according to moving speed of terminal

Technical field

The present invention relates to the field of mobile communication technologies, and in particular, to an evolved universal terrestrial radio access network.

(E-UTRAN, Evolved Universal Terrestrial Radio Access Network) A method and system for adjusting parameters according to the moving speed of a terminal.

Background technique

In order to ensure the continuity of the service when the user moves in the wireless network, it is inevitable that the terminal switches between cells. The user equipment (UE, User Equipment) performs timely handover according to reasonable handover configuration parameters, which not only improves the network handover success rate, but also improves the user's usage sensitivity; unreasonable handover configuration parameters, not only due to the UE If the switching timing is unreasonable, the call drop has already been generated without triggering the handover, and it will cause a series of problems such as switching too early, switching too late, switching to the wrong cell, and ping-pong switching. How to configure reasonable and effective switching parameters has always been the focus of network optimization and the difficulty of network performance improvement. However, due to the complexity of the network environment, there are various complex coverage scenarios in the network coverage area, such as the difference between urban and suburban coverage, and the switching parameters of high-speed scenes and low-speed scenes are different, even in high-speed scenes, such as high-speed rail. Coverage, there are also reasons such as the train entering and leaving the station, causing the train to travel in different cells at different speeds along the railway, so it is difficult to determine a set of universal switching configuration parameters suitable for various wireless scenarios. However, if the network optimizer optimizes the switching parameters for each specific situation of the cell, it is a matter that requires a lot of manpower and material resources.

Currently, the 3GPP R9 36.331 protocol proposes to transmit a UE based speed measurement factor by a base station to indicate a UE with different moving speeds, and dynamically adjust a Time to Trigger parameter in a handover configuration parameter of the base station to ensure different movements. The speed UE can switch according to its own mobile characteristics and with reasonable trigger duration parameters. The triggering duration of the handover parameter is required to trigger the terminal to report the measurement report of the neighboring area to the base station after the pilot station searches for the signal of the neighboring area, and the pilot signal strength of the neighboring area is always greater than the specified threshold. The UE speed determination criterion proposed by the 3GPP R9 protocol determines whether the UE is at different moving speeds according to whether the number of UE handover cells reaches a specified threshold within a specified time, and then the UE dynamically changes according to different moving speeds. Adjust the switching parameter threshold. The mechanism proposed by the protocol can improve the handover success rate of the UE at the corresponding moving speed when the UE satisfies the determination criterion of the corresponding speed. For example, when the speed determination criterion sent by the base station is that the number of handover cells is greater than N in S seconds, the UE is determined to be high speed. When the UE passes N or more cells in S seconds, the current handover parameter can be adjusted to be a high-speed scenario. The following switching parameter configuration improves the success rate of subsequent handovers. However, when the UE moves in the first 1 N-1 cells, the handover parameters cannot be dynamically adjusted because the judgment conditions for entering the high-speed scene are not satisfied, and there is still a high risk of handover failure. Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method and system for adjusting parameters according to the moving speed of the terminal, and solving the problem that the UE cannot adjust the handover parameter configuration in time when the number of handovers of the specified cell has not been reached, thereby causing a high risk of handover failure. .

In order to solve the above technical problem, the following technical solutions are used in the embodiment of the present invention:

A method for adjusting parameters according to a moving speed of a terminal, comprising:

The mobile terminal detects the signal strength of the serving cell according to the speed determination criterion sent by the base station, and determines the current moving speed, and adjusts the system parameter according to the moving speed;

The system parameter is a cell reselection threshold parameter or a handover trigger duration parameter.

Optionally, when the system parameter is the cell reselection threshold, the mobile terminal detects the signal strength of the serving cell according to the speed determination criterion sent by the base station, and determines the current moving speed, and adjusts the system parameter according to the moving speed. Includes:

The mobile terminal in the idle state measures the signal strength of the serving cell in N measurement periods in N measurement periods, and calculates the signal strength difference of the serving cell in the N-1 adjacent measurement periods;

When the signal strength difference of the N-1 serving cells satisfies the high-speed threshold, the mobile terminal determines that the moving speed is high speed, and when performing cell reselection, adds a high speed to the cell reselection threshold determined by the base station. The coefficient value is used as the updated cell reselection threshold;

When the signal strength difference of the N-1 serving cells satisfies the medium speed threshold and does not satisfy the high speed threshold, the mobile terminal determines that the moving speed is a medium speed, and when performing cell reselection, at the base The medium re-selection threshold determined by the station is increased as the updated cell re-selection threshold.

Optionally, when the system parameter is the cell handover trigger duration, the mobile terminal detects the signal strength of the serving cell according to the speed determination criterion sent by the base station, and determines the current moving speed, and adjusts the system parameter according to the moving speed. Includes:

The mobile terminal in the connected state measures the signal strength of the serving cell in N measurement periods in N measurement periods, and calculates the signal strength difference of the serving cell in the N-1 adjacent measurement periods;

When the signal strength difference of the N-1 serving cells satisfies the high-speed threshold, the mobile terminal determines that the moving speed is a high speed, and when performing the neighboring area measurement, multiplies the high-speed by the base switching trigger duration determined by the base station. The coefficient value is used as the trigger time of the updated cell handover;

When the signal strength difference of the N-1 serving cells satisfies a medium speed threshold and does not satisfy the high speed threshold, the mobile terminal determines that the moving speed is a medium speed, and when performing neighboring area measurement, determining at the base station The cell handover trigger duration is multiplied by the medium-speed coefficient value as the updated cell handover trigger duration.

Optionally, one of the serving cell signal strength differences of the N-1 neighboring measurement periods is different from the signal strength of the serving cell and the signal strength of the serving cell in the previous detection period. Absolute value, squared value or mean squared difference.

Optionally, the signal strength difference of the N-1 serving cells meets the high-speed threshold, that is, the signal strength difference of the N-1 serving cells is greater than the high-speed threshold, or the average value of the signal strength difference of the N-1 serving cells is greater than The high speed threshold;

If the signal strength difference of the N-1 serving cells satisfies the medium-speed threshold and the high-speed threshold is not satisfied, the signal strength difference of the N-1 serving cells is smaller than the high-speed threshold and greater than the medium-speed threshold, or N The average of the signal strength differences of the -1 serving cells is less than the high speed threshold and greater than the medium speed threshold.

A system for adjusting parameters according to a moving speed of a terminal, comprising: a base station and a terminal, wherein the base station includes a terminal speed determining criterion configuration module and a terminal speed determining criterion sending module; The speed determination criterion receiving module, the speed determining module, and the parameter adjusting module, wherein: the terminal speed determining criterion configuration module is configured to: configure a terminal speed determining criterion; the terminal speed determining criterion sending module is configured to: The speed determination criterion is sent to the mobile terminal;

The speed determination criterion receiving module is configured to: after receiving the terminal speed determination criterion,

The speed determination module is configured to: detect a signal strength of the serving cell according to the terminal speed determination criterion, and determine a current moving speed and send the moving speed to the parameter adjustment module; the parameter adjustment module is configured to: The moving speed adjusts system parameters, where the system parameters are cell reselection threshold parameters or handover trigger timing parameters.

Optionally, the speed determining module is configured to detect a signal strength of the serving cell according to the terminal speed determination criterion and determine a current moving speed according to the following manner: measuring, in N measurement periods, that the serving cell is in N measurement periods Signal strength, and calculate the signal strength difference of the serving cell of N-1 adjacent measurement periods. When the signal strength difference of N-1 serving cells satisfies the high-speed threshold, it is determined that the moving speed is high speed, and N-1 serving cells When the signal strength difference satisfies the medium speed threshold and does not satisfy the high speed threshold, determining that the moving speed is a medium speed;

The parameter adjustment module is configured to adjust the system parameter according to the moving speed according to the following manner: when performing cell reselection in a high speed situation, after adding a high speed coefficient value on the basis of the cell reselection threshold determined by the base station As the updated cell reselection threshold; when the cell reselection is performed in the medium speed case, the medium speed coefficient value is added to the base cell reselection threshold determined by the base station as the updated cell reselection threshold.

The parameter adjustment module is configured to adjust the system according to the moving speed in the following manner The parameter is: when the neighboring area measurement is performed at a high speed, the time of the cell handover trigger determined by the base station is multiplied by the high speed coefficient value as the updated cell handover trigger duration; when the neighboring area measurement is performed in the medium speed case, Multiplying the medium-speed coefficient value by the cell handover trigger duration determined by the base station is used as the updated cell handover trigger duration.

A terminal includes a speed determination criterion receiving module, a speed determining module and a parameter adjusting module, wherein:

The speed determination criterion receiving module is configured to: receive a terminal speed determination criterion, and then send the terminal speed determination criterion to the speed determination module;

Optionally, the speed determining module is configured to detect a signal strength of the serving cell according to the terminal speed determination criterion and determine a current moving speed according to the following manner: measuring, in N measurement periods, that the serving cell is in N measurement periods Signal strength, and calculate the signal strength difference of the serving cell of N-1 adjacent measurement periods. When the signal strength difference of N-1 serving cells satisfies the high-speed threshold, it is determined that the moving speed is high speed, and N-1 serving cells Signal strength difference meets medium speed threshold And when the high speed threshold is not satisfied, determining that the moving speed is a medium speed;

The parameter adjustment module is configured to adjust the system parameter according to the moving speed according to the following manner: when performing neighbor cell measurement in a high speed condition, multiplying the cell switching trigger duration determined by the base station by a high speed coefficient value As the updated cell handover trigger duration; when the neighbor cell measurement is performed in the medium speed case, the intermediate cell coefficient value is multiplied by the cell handover trigger duration determined by the base station as the updated cell handover trigger duration.

If the signal strength difference of the N-1 serving cells satisfies the medium-speed threshold and the high-speed threshold is not satisfied, the signal strength difference of the N-1 serving cells is smaller than the high-speed threshold and greater than the medium-speed threshold, or N The average of the signal strength differences of the -1 serving cells is less than the high speed threshold and greater than the medium speed threshold. The problem to be solved by the embodiment of the present invention is that in the 3GPP protocol, in the UE speed adjustment handover parameter mechanism, the UE speed determination is determined by the number of cells that the UE switches in a specified time, and the UE is not yet reached the specified number of cell handovers. The switch parameter configuration cannot be adjusted in time, resulting in a problem of higher risk of handover failure. The embodiments of the present invention are directed to the above-mentioned deficiencies of dynamically adjusting handover parameters based on UE speed in the 3GPP protocol, and propose a method for determining the UE moving speed according to the trend of the cell signal quality change in the current serving cell. The above technical solution can improve the accuracy and timeliness of the UE speed determination, improve the network switching success rate, and improve user experience. BRIEF abstract

1 is a schematic structural diagram of a system for adjusting parameters according to a moving speed of a terminal in an embodiment; FIG. 2 is a flowchart of adjusting a cell reselection threshold according to a moving speed of a terminal in the first application example; FIG. 3 is a moving speed determining method in the first application example Flow chart

FIG. 4 is a flow chart of adjusting the triggering time of the cell handover according to the moving speed of the terminal in the second application example.

Preferred embodiment of the invention

The focus of the embodiment of the present invention is that the UE determines the current moving speed by receiving the change of the signal strength of the serving cell, and further combines with the speed-based switching parameter adjustment mechanism in the protocol to perform speed-based switching parameter adjustment.

The manner of the embodiments of the present invention can be applied not only to the EUTRA system but also to other standard networks.

As shown in FIG. 1, the system for adjusting parameters according to the moving speed of the terminal includes a base station and a terminal. The base station includes a terminal speed determination criterion configuration module 101 and a terminal speed determination criterion delivery module 102. The terminal includes a speed determination criterion receiving module 103, a speed determination module 104, and a parameter adjustment module 105, where:

The terminal speed determination criterion configuration module 101 is configured to: configure a terminal speed determination criterion; the terminal speed determination criterion delivery module 102 is configured to: deliver the terminal speed determination criterion To the mobile terminal;

The speed determination criterion receiving module 103 is configured to: after receiving the terminal speed determination criterion, send to the speed determination module 104;

The speed determination module 104 is configured to: detect the signal strength of the serving cell according to the terminal speed determination criterion and determine the current moving speed and send to the parameter adjustment module 105;

The parameter adjustment module 105 is configured to: adjust system parameters according to the moving speed, where the system parameter is a cell reselection threshold parameter or a handover trigger duration parameter.

In the technical solution, three parameters are mainly involved, the detection period P, the number of detection periods N, and the signal strength difference standard S. _Ffsrt , the criterion is: The difference between 8^ and -' satisfies S. _Ffsrt .

S _P ^N refers to the signal strength of the serving cell received by the UE during the detection period of the Nth period length P. The signal strength may be an average value of the UE receiving the serving cell signal in the period P during the period P or a value calculated by the UE to receive the serving cell signal in the present detection period calculated in other manners.

The difference between 8^ and S may be the difference between the received signal strength of the adjacent period UE, the mean square error, or the difference between the received signal strengths of the UEs in the reactive neighboring period calculated by other methods.

In the first embodiment, the terminal in the idle state adjusts the cell reselection parameter according to the current moving speed. The speed determining module 104 is configured to: measure the signal strength of the serving cell in the N measurement periods in the N measurement periods, and calculate the signal strength difference of the serving cell of the N-1 adjacent measurement periods, where the N-1 When the signal strength difference of the serving cell satisfies the high speed threshold, it is determined that the moving speed is high speed, and when the signal strength difference of the N-1 serving cells satisfies the medium speed threshold and does not satisfy the high speed threshold, the moving speed is determined to be the medium speed;

The parameter adjustment module 105 is further configured to: when performing cell reselection in a high speed situation, increase the high speed coefficient value on the basis of the cell reselection threshold determined by the base station as the updated cell reselection threshold; During the selection, the medium speed coefficient value is added to the updated cell reselection threshold based on the cell reselection threshold determined by the base station.

In the first embodiment, the terminal in the connected state adjusts the cell handover trigger duration according to the current moving speed.

The speed determining module 104 is configured to: measure the signal strength of the serving cell in the N measurement periods in the N measurement periods, and calculate the signal strength of the serving cell in the N-1 adjacent measurement periods. Degree difference, when the signal strength difference of the N1 serving cells meets the high-speed threshold, determining that the moving speed is high speed, and when the signal strength difference of the N-1 serving cells satisfies the medium-speed threshold and does not satisfy the high-speed threshold, determining that the moving speed is medium speed;

The parameter adjustment module 105 is configured to: when the neighboring area measurement is performed at a high speed, multiply the high-speed coefficient value by the base station triggering duration determined by the base station as the updated cell handover trigger duration; when the neighboring area measurement is performed at the medium speed And multiplying the medium-speed coefficient value by the cell handover trigger duration determined by the base station as the updated cell handover trigger duration.

The difference between the signal strength of the serving cell and the signal strength of the serving cell in the previous detection period refers to an absolute value of the difference between the two signal strengths, a squared difference value, and a mean square error.

The signal strength difference of the N-1 serving cells meets the high-speed threshold, that is, the signal strength difference of the N-1 serving cells is greater than the high-speed threshold, or the average of the signal strength differences of the N-1 serving cells The value is greater than the high-speed threshold; the signal strength difference of the N-1 serving cells meets the medium-speed threshold and the high-speed threshold is not satisfied, where the signal strength difference of the N-1 serving cells is smaller than the high-speed threshold and greater than the The medium speed threshold, or the average of the signal strength differences of the N-1 serving cells is less than the high speed threshold and greater than the medium speed threshold.

The method for adjusting parameters according to the moving speed of the terminal corresponding to the foregoing system includes: the mobile terminal detects the signal strength of the serving cell according to the speed determination criterion sent by the base station, and determines the current moving speed, and adjusts the system parameter according to the moving speed, The system parameter is a cell reselection threshold parameter or a handover trigger duration parameter.

Embodiment 1:

The system parameter is a cell reselection threshold, and the mobile terminal in an idle state measures the signal strength of the serving cell in N measurement periods in N measurement periods, and calculates a serving cell of N-1 adjacent measurement periods. When the signal strength difference of the N-1 serving cells satisfies the high-speed threshold, the mobile terminal determines that the moving speed is high speed, and when performing cell reselection, increases the high-speed coefficient based on the cell reselection threshold determined by the base station. The value is used as the updated cell reselection threshold. When the signal strength difference of the N-1 serving cells satisfies the medium speed threshold and does not satisfy the high speed threshold, the mobile terminal determines that the moving speed is a medium speed, and performs cell reselection. And adding the medium speed coefficient value to the updated cell reselection threshold based on the cell reselection threshold determined by the base station. Embodiment 2:

The system parameter is a cell handover trigger duration, and the mobile terminal in the connected state measures the signal strength of the serving cell in N measurement periods in N measurement periods, and calculates a serving cell of N-1 adjacent measurement periods. When the signal strength difference of the N-1 serving cells satisfies the high-speed threshold, the mobile terminal determines that the moving speed is a high speed, and when performing the neighboring area measurement, multiplies the high-speed coefficient by the base switching trigger duration determined by the base station. After the value is used as the updated cell handover trigger duration; when the signal strength difference of the N-1 serving cells satisfies the medium-speed threshold and does not satisfy the high-speed threshold, the mobile terminal determines that the moving speed is a medium speed, and when performing the neighboring area measurement, The intermediate cell coefficient value is multiplied by the cell handover trigger duration determined by the base station as the updated cell handover trigger duration.

The embodiment of the present invention further provides a method for adjusting a parameter according to a moving speed of a terminal, including: the mobile terminal detects a signal strength of the serving cell according to a speed determination criterion sent by the base station, and determines a current moving speed, and adjusts according to the moving speed. System parameters;

When the signal strength difference of the N-1 serving cells satisfies the medium speed threshold and does not satisfy the high speed threshold, the mobile terminal determines that the moving speed is a medium speed, and when performing cell reselection, the determined by the base station After the cell reselection threshold is increased, the medium speed coefficient value is added as the updated cell reselection threshold.

Optionally, when the system parameter is the cell handover trigger duration, the mobile terminal is configured according to the base station. The issued speed determination criterion detects the signal strength of the serving cell and determines the current moving speed, and the steps of adjusting the system parameters according to the moving speed include:

When the signal strength difference of the N-1 serving cells satisfies the high-speed threshold, the mobile terminal determines that the moving speed is a high speed, and when performing the neighboring area measurement, multiplies the high-speed by the base switching trigger duration determined by the base station. The coefficient value is used as the updated cell handover trigger duration; when the N-1 serving cell signal strength differences satisfy the medium speed threshold and the high speed threshold is not met, the mobile terminal determines that the moving speed is a medium speed, When the neighboring cell measurement is performed, the cell handover trigger duration determined by the base station is multiplied by the medium-speed coefficient value as the updated cell handover trigger duration.

The embodiment of the invention further provides a terminal, comprising a speed determination criterion receiving module, a speed determining module and a parameter adjusting module, wherein:

The speed determination module is configured to: detect a serving cell according to the terminal speed determination criterion Signal strength and determining a current moving speed and transmitting the moving speed to the parameter adjusting module; the parameter adjusting module is configured to: adjust a system parameter according to the moving speed, where the system parameter is a cell reselecting threshold parameter or Switch the trigger timing parameters.

Optionally, the N-1 serving cell signal strength differences satisfying the high speed threshold refers to N-1 services. The signal strength difference of the service cell is greater than the high speed threshold, or the average value of the signal strength difference of the N-1 serving cells is greater than the high speed threshold;

The solution is described in detail below through an application example.

Application example one

As shown in FIG. 2, in the system parameter message of the cell, the UE speed determination criterion is sent to the UE, and the UE in the idle state determines the current moving speed after receiving the speed determination criterion sent by the base station. Used to adjust cell reselection parameters.

Step 1: The base station sends a UE speed determination criterion in the system parameter message of the cell according to the system configuration, and the criterion is described in a Mobility State Parameters cell.

Where the base station is in the mobile state parameter of SIB3 (SystemInformationBlockType3)

In the (Mobility State Parameters) cell, the following UE speed determination parameters are added, and the parameter names include but are not limited to:

n-RxEvaluatePeriod, indicating the number of measurement cycles;

t-RxEvaluatePeriod , indicating the length of the measurement period;

d-RxOffsetMedium, indicating the medium speed threshold;

d-RxoffsetHigh , indicating a high speed threshold;

sf-Medium , indicating the medium speed coefficient value;

sf-High, which represents the high speed coefficient value.

Step 2: After receiving the speed determination criterion sent by the base station, the UE determines the current moving speed according to the determination criterion.

A typical judgment process is shown in FIG. 3. The UE determines the signal strength of the serving cell in the current period and the service in the previous week during a detection period (ie, within the timing of detecting the period timer). Whether the difference of the cell signal reaches a specified threshold (this threshold refers to a high-speed threshold or a medium-speed threshold). If the difference of the serving cell signals of the adjacent detection period is continuously N-1 times in the N detection periods is greater than the high-speed threshold, then It is determined that the current speed is high speed; if the difference of the serving cell signals of the adjacent detection period is continuously N-1 times in the N detection periods is less than the high speed threshold and greater than the medium speed threshold, it is determined that the current speed is the medium speed.

Step 3: The UE adjusts a cell reselection parameter threshold according to the current speed determination result.

If the UE is in the high-speed mode, the UE adds the sf-High to the base station to perform the cell reselection threshold. If the UE is the medium-speed, the UE needs to send the base station to perform the cell reselection. Add sf-Medium based on the cell reselection threshold.

Step 4: The UE performs the cell reselection process according to the adjusted cell reselection parameter threshold. As shown in FIG. 4, the application example 2 sends the UE speed determination criterion to the UE in the system parameter message of the cell. After receiving the speed determination criterion sent by the base station, the UE in the connected state determines the current moving speed and adjusts the cell handover parameter.

Step 1: The base station sends a UE speed determination criterion in the UE measurement configuration message according to the system configuration, and the criterion is described in a Mobility State Parameters cell. The specific method is the same as that in the first application example.

Step 2: After receiving the speed determination criterion sent by the base station, the UE determines the current moving speed according to the determination criterion, and the specific determination manner is the same as that in the application example 1, and details are not described herein again.

Step 3: The UE adjusts a cell handover trigger duration according to the current speed determination result.

If the UE is in the high-speed, the UE needs to multiply the cell handover trigger duration determined by the base station by sf-High when performing the neighbor cell measurement; if the UE is the medium-speed, the UE needs to determine the cell determined by the base station when performing the neighbor cell measurement. Multiply the trigger trigger time by sf-Medium.

It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other. Of course, the invention may have other various embodiments without departing from the spirit and spirit of the invention. However, such corresponding changes and modifications are intended to be included within the scope of the appended claims. One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct the associated hardware, such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

Industrial applicability

The above technical solution can improve the accuracy and timeliness of UE speed judgment, improve the network switching success rate, and improve user experience. Therefore, the present invention has strong industrial applicability.

Claims

Claim

1. A method for adjusting parameters according to a moving speed of a terminal, comprising:

The method according to claim 1, wherein, when the system parameter is the cell reselection threshold, the mobile terminal detects the signal strength of the serving cell according to the speed determination criterion sent by the base station, and determines the current moving speed, according to The steps of moving the speed adjustment system parameters include:

The method according to claim 1, wherein, when the system parameter is the cell handover trigger duration, the mobile terminal detects the signal strength of the serving cell according to the speed determination criterion sent by the base station, and determines the current moving speed, according to The steps of moving the speed adjustment system parameters include:

When the signal strength difference of the N-1 serving cells satisfies the high-speed threshold, the mobile terminal determines that the moving speed is a high speed, and when performing the neighboring area measurement, multiplies the high-speed by the base switching trigger duration determined by the base station. The coefficient value is used as the updated cell handover trigger duration; when the N-1 serving cell signal strength differences meet the medium speed threshold and the high speed is not satisfied When the threshold is determined, the mobile terminal determines that the moving speed is a medium speed, and when the neighboring area measurement is performed, multiplying the medium speed coefficient value by the cell switching trigger duration determined by the base station, as an updated cell handover trigger duration.

4. The method of claim 2 or 3, wherein

The signal strength difference of one of the serving cell signal strengths of the N-1 adjacent measurement periods refers to the absolute value of the difference between the signal strength of the serving cell and the signal strength of the serving cell in the previous detection period. , the difference squared value or the mean squared difference.

5. The method of claim 2 or 3, wherein

The signal strength difference of the N-1 serving cells satisfies the high-speed threshold, that is, the signal strength difference of the N-1 serving cells is greater than the high-speed threshold, or the average value of the signal strength differences of the N-1 serving cells is greater than the high-speed threshold. ;

A system for adjusting parameters according to a moving speed of a terminal, comprising: a base station and a terminal, wherein the base station includes a terminal speed determining criterion configuration module and a terminal speed determining criterion sending module; the terminal includes a speed determining criterion receiving module, and a speed determining Module and parameter adjustment module, where:

The terminal speed determination criterion configuration module is configured to: configure a terminal speed determination criterion; the terminal speed determination criterion delivery module is configured to: send the terminal speed determination criterion to the mobile terminal;

The speed determination criterion receiving module is configured to: after receiving the terminal speed determination criterion, the speed determination module is configured to: detect a signal strength of the serving cell according to the terminal speed determination criterion, and determine a current moving speed and The moving speed is sent to the parameter adjustment module; the parameter adjustment module is configured to: adjust system parameters according to the moving speed, where the system parameter is a cell reselection threshold parameter or a switching trigger timing parameter.

7. The system of claim 6 wherein: The speed determination module is configured to detect a signal strength of the serving cell according to the terminal speed determination criterion and determine a current moving speed according to the following manner: measuring, in N measurement periods, a signal strength of the serving cell in N measurement periods, And the signal strength difference of the serving cell of the N-1 adjacent measurement periods is calculated, and when the signal strength difference of the N-1 serving cells satisfies the high-speed threshold, the moving speed is determined to be high speed, and the signal strength difference of the N-1 serving cells is satisfied. When the medium speed threshold is not satisfied and the high speed threshold is not met, it is determined that the moving speed is a medium speed;

8. The system of claim 6 wherein

The speed determination module is configured to detect a signal strength of the serving cell according to the terminal speed determination criterion and determine a current moving speed according to the following manner: measuring, in N measurement periods, a signal strength of the serving cell in N measurement periods, And the signal strength difference of the serving cell of the N-1 adjacent measurement periods is calculated, and when the signal strength difference of the N-1 serving cells satisfies the high-speed threshold, the moving speed is determined to be high speed, and the signal strength difference of the N-1 serving cells is satisfied. When the medium speed threshold is not satisfied and the high speed threshold is not met, it is determined that the moving speed is a medium speed;

9. The system of claim 7 or 8, wherein

10. The system of claim 7 or 8, wherein The signal strength difference of the N1 serving cells satisfies the high-speed threshold, that is, the signal strength difference of the N-1 serving cells is greater than the high-speed threshold, or the average value of the signal strength difference of the N-1 serving cells is greater than the high-speed threshold;

11. A terminal, comprising a speed determination criterion receiving module, a speed determining module, and a parameter adjusting module, wherein:

12. The terminal of claim 11 wherein:

13. The terminal of claim 11, wherein The speed determination module is configured to detect a signal strength of the serving cell according to the terminal speed determination criterion and determine a current moving speed according to the following manner: measuring, in N measurement periods, a signal strength of the serving cell in N measurement periods, And the signal strength difference of the serving cell of the N-1 adjacent measurement periods is calculated, and when the signal strength difference of the N-1 serving cells satisfies the high-speed threshold, the moving speed is determined to be high speed, and the signal strength difference of the N-1 serving cells is satisfied. When the medium speed threshold is not satisfied and the high speed threshold is not met, it is determined that the moving speed is a medium speed;

The terminal according to claim 12 or 13, wherein