WO2021077866A1

WO2021077866A1 - Handover control method and related device

Info

Publication number: WO2021077866A1
Application number: PCT/CN2020/108572
Authority: WO
Inventors: 葛晨晖; 李文; 古江春
Original assignee: 华为技术有限公司
Priority date: 2019-10-23
Filing date: 2020-08-12
Publication date: 2021-04-29
Also published as: CN112702770A; CN112702770B

Abstract

Disclosed in the embodiments of the present application is a handover control method, which can be applied to long term evolution (LTE), enhanced machine-type communication (eMTC) or 5G NR, etc. A base station obtains first network signal quality parameters corresponding to a first terminal, obtains an A2 measurement threshold according to the first network signal quality parameters and configures the A2 measurement threshold for a second terminal; if the base station receives an A2 measurement report reported by the second terminal, the base station configures measurement GAP and handover measurement for the second terminal. The A2 measurement threshold can be automatically determined to trigger the measurement GAP and the handover measurement, so as to adapt to specific situations under different environments.

Description

Switching control method and related equipment

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on October 23, 2019, the application number is 201911013923.X, and the invention title is "a switching control method and related equipment", the entire content of which is incorporated by reference In this application.

Technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a handover control method and related equipment.

Background technique

In order to meet the needs of the Internet of Everything, the 3rd Generation Partnership Project (3GPP) has proposed a new type of enhanced machine type communication in the long term evolution (LTE) standard protocol evolution. enhanced machine-type communication (eMTC) Internet of Things technology. In order to ensure that no service interruption or even call drop occurs when the terminal moves from a serving cell to another serving cell, the eMTC terminal needs to support the handover function between different cells. According to 3GPP TS 36.300 V13.4.0, eMTC terminals usually need to start GAP when measuring the same frequency A3. This is mainly because: in order to reduce costs, the release 13 version of eMTC terminals only support a single narrow band (narrow band, NB), that is, the receiver It only supports a maximum of 6 consecutive RBs, which makes the receiver unable to tune to the center 6RB to measure the neighboring cells. If you need to perform the same frequency A3 measurement, you need to rely on the measurement GAP mechanism to allow the receiver to measure the signal quality of the neighboring cells during GAP. Usually eMTC terminal generally has only one receiver. If eMTC terminal needs to switch cells, it needs to perform A3 measurement and GAP measurement. Since measuring GAP will affect the throughput of eMTC terminal, it is necessary to reduce unnecessary GAP measurement as much as possible. .

The prior art provides a mechanism. When an eMTC terminal enters the network, first, the network maintainer sets a fixed threshold according to experience values and configures A2 measurement. The eMTC terminal performs A2 measurement. If the eMTC terminal reports to the base station Reporting A2 measurement means that the eMTC terminal has measured that the signal quality of the current serving cell is lower than the fixed threshold, and the base station can determine that the eMTC terminal has moved to the edge of the serving cell. Only then is the eMTC terminal required to measure GAP And A3 measurement, if the A2 measurement is not reported, the eMTC terminal does not need to measure GAP and A3 measurement.

However, in the prior art, the A2 measurement threshold of each terminal is a fixed value set by the network maintenance personnel according to the environment in which each cell is located. The fixed value is generally the experience value of the network maintenance personnel. If the fixed value is If the setting is too high, the eMTC terminal will frequently measure GAP and A3 measurements, which will affect the throughput. If the fixed value is set too low, it will affect the timeliness of cell handover. Therefore, the A2 measurement gate is set in the prior art. The limit method cannot flexibly adapt to various network environments.

Summary of the invention

The embodiment of the present application provides a handover control method and related equipment, which are used by a base station to automatically determine a threshold, and trigger GAP measurement and handover measurement through the threshold.

The first aspect of the embodiments of the present application provides a handover control method, including:

After the first terminal enters the network, if it moves to the edge of the serving cell and needs to switch the cell, the base station can receive the handover measurement report sent by the first terminal and obtain the first network signal quality parameter in the handover measurement report. The signal quality parameter is related to the signal quality of the serving cell where the first terminal is located. The base station can perform handover of the first terminal, and the base station can obtain the A2 measurement threshold. The A2 measurement threshold is obtained by processing the first network signal quality parameter. After the second terminal enters the network, the base station configures the A2 measurement threshold for the second terminal. The second terminal is a terminal that needs to measure GAP for handover and the second terminal and the first terminal belong to the serving cell. If the base station receives the A2 reported by the second terminal A measurement report. The base station configures a measurement GAP and handover measurement for the second terminal. The A2 measurement report is used to indicate that the second network signal quality parameter corresponding to the second terminal reaches the A2 measurement threshold.

In the embodiment of the present application, the first network signal quality parameter corresponding to the first terminal is obtained through the base station, and the A2 measurement threshold is obtained by processing the first network signal quality parameter. The base station configures the A2 measurement threshold for the second terminal, because the A2 measurement threshold is Based on the processing of the first network signal quality parameters sent by the first terminal, the A2 measurement threshold can be automatically determined according to the characteristics of different cells to trigger the measurement of GAP and switch the measurement, so as to adapt to specific conditions in different environments.

Based on the first aspect of the embodiments of the present application, in the first implementation manner of the first aspect of the embodiments of the present application, there are multiple ways for the base station to obtain the A2 measurement threshold. After a network signal quality parameter, the first network signal quality parameter is recorded to obtain a sample set. The base station processes the sample set to obtain the target parameter. The base station adds the first redundancy amount to the target parameter to obtain the A2 measurement threshold. The margin may be related to the moving speed of the second terminal or channel fading.

In the embodiment of the application, the base station can obtain the A2 measurement threshold by processing the first network signal quality parameter by itself, reducing the third device to receive the first network signal quality parameter, processing the first network signal quality parameter to obtain the A2 measurement threshold, and sending it to the base station The step of A2 measurement threshold improves the integrated processing capability of the base station.

Based on the first implementation manner of the first aspect of the embodiments of the present application, in the second implementation manner of the first aspect of the embodiments of the present application, the base station can also obtain the A1 measurement threshold, which is used to determine whether the second terminal is serving The signal quality of the cell is good or bad. For example, after processing the sample set, the base station can add a second redundancy based on the target parameters to obtain the A1 measurement threshold. The second redundancy can be related to the moving speed of the second terminal or Channel fading is related, and the second redundancy is greater than the first redundancy. After the base station obtains the A1 measurement threshold, the base station can configure the A1 measurement threshold for the second terminal. If the second terminal reports the A1 measurement report, it means the first The signal quality of the second terminal in the serving cell is higher than the A1 measurement threshold. If the second terminal does not report the A1 measurement report, it means that the signal quality of the second terminal in the serving cell is not higher than the A1 measurement threshold.

In the embodiment of the present application, the base station can obtain the A1 measurement threshold through the target parameter, and use the A1 measurement threshold to determine whether the signal quality of the second terminal in the serving cell is good or bad.

Based on the second implementation manner of the first aspect of the embodiments of the present application, in the third implementation manner of the first aspect of the embodiments of the present application, if the base station configures the measurement GAP for the second terminal and the handover measurement, the base station does not receive the second The handover measurement report reported by the terminal and the reception of the A1 measurement report reported by the second terminal indicates that the signal quality of the second terminal in the serving cell is higher than the A1 measurement threshold. In other words, the second terminal has moved to the center of the serving cell and the base station The measurement GAP and handover measurement can be configured for the second terminal.

In the embodiment of the present application, the base station can configure the measurement GAP and handover measurement for the second terminal by receiving the A1 measurement threshold sent by the second terminal, subtracting unnecessary configuration and measurement, and improving the throughput of the second terminal.

Based on the first implementation manner of the first aspect of the embodiments of the present application, in the fourth implementation manner of the first aspect of the embodiments of the present application, the base station can process the sample set to obtain target parameters in multiple ways. For example, the base station can transfer the sample The first network signal quality parameter in the set is input into the cumulative distribution function to obtain the cumulative distribution function of the first network signal quality parameter, and then the value corresponding to the first network signal quality parameter is selected as the target parameter in the cumulative distribution function according to the target probability The target probability is set as required. Assuming that the target probability is 0.8, it means that 80% of the first terminals in the sample set have values of the first network signal quality parameter corresponding to the serving cell when switching services are less than or equal to the target parameter.

In the embodiment of the present application, the base station can control the handover condition of the terminal through the cumulative distribution function, which is beneficial to the network maintenance personnel to obtain the target parameter according to the required probability.

Based on the first implementation manner of the first aspect of the embodiments of the present application, in the fifth implementation manner of the first aspect of the embodiments of the present application, the base station can process the sample set to obtain target parameters in multiple ways, for example, the base station can calculate the sample The average value of all the first network signal quality parameters in the set is used to obtain the target parameter.

In the embodiment of the present application, the base station uses the average value of all the first network signal quality parameters in the sample set as the target parameter, which improves the feasibility of the solution.

Based on the first aspect of the embodiments of the present application, in the sixth implementation manner of the first aspect of the embodiments of the present application, there are multiple ways for the base station to obtain the A2 measurement threshold. For example, through the network management server, the base station sends the first measurement threshold to the network management server. For the network signal quality parameter, the base station receives the A2 measurement threshold sent by the network management server, and the A2 measurement threshold is obtained by the network management server processing the first network signal quality parameter.

In the embodiment of the present application, the base station may send the first network signal quality parameter to the network management server, and the network management server processes the first network signal quality parameter to obtain the A2 measurement threshold, and then sends the A2 measurement threshold to the base station, thereby reducing the number of base stations. The computational load.

Based on the first aspect of the embodiments of the present application, in the seventh implementation manner of the first aspect of the embodiments of the present application, the first terminal may specifically be a long-term evolution LTE terminal or a new air interface NR terminal, and the second terminal is an enhanced machine type Communication eMTC terminal.

In the embodiments of the present application, the specific implementation forms of the first terminal and the second terminal are limited, which improves the feasibility of the solution.

Based on the first implementation manner of the first aspect of the embodiments of the present application, in the eighth implementation manner of the first aspect of the embodiments of the present application, the first network signal quality parameter may specifically be the handover of the first terminal from the serving cell to the target cell Reference signal received power RSRP at time, the second network signal quality parameter may specifically be RSRP, and the target parameter may specifically be target RSRP.

In the embodiments of the present application, specific implementation forms of the first network signal quality parameter, the second network signal quality parameter, and the target parameter are defined, which improves the feasibility of the solution.

Based on the first implementation manner of the first aspect of the embodiments of the present application, in the ninth implementation manner of the first aspect of the embodiments of the present application, the first network signal quality parameter may specifically be the handover of the first terminal from the serving cell to the target cell The reference signal received power RSRQ at time, the second network signal quality parameter may specifically be RSRQ, and the target parameter may specifically be target RSRQ.

Based on the first implementation manner of the first aspect of the embodiments of the present application, in the tenth implementation manner of the first aspect of the embodiments of the present application, the first network signal quality parameter may specifically be the handover of the first terminal from the serving cell to the target cell The reference signal received power SINR at the time, the second network signal quality parameter may specifically be the SINR, and the target parameter may specifically be the target SINR.

Based on the first aspect of the embodiments of the present application, in the eleventh implementation manner of the first aspect of the embodiments of the present application, the handover measurement may specifically be A3 measurement, A4 measurement, or A5 measurement.

In the embodiments of the present application, the specific implementation form of handover measurement is limited, and the feasibility of the solution is improved.

A second aspect of the embodiments of the present application provides a handover control method, including:

The network management server receives the first network signal quality parameter sent by the base station, the first network signal quality parameter is related to the signal quality of the serving cell where the first terminal is located, the network management server analyzes the first network signal quality parameter to obtain the target parameter, and the network management server processes The target parameter obtains the A2 measurement threshold, and sends the A2 measurement threshold to the base station, so that the base station configures the A2 measurement threshold for the second terminal, the second terminal needs to measure GAP for handover cells, and the second terminal and the first terminal Belongs to the serving cell.

In the embodiment of the present application, the first network signal quality parameter corresponding to the first terminal is received through the network management server, the first network signal quality parameter is analyzed and processed to obtain the A2 measurement threshold, and the A2 measurement threshold is sent to the base station, so that the base station is The second terminal configures the A2 measurement threshold, and can automatically determine the A2 measurement threshold according to the characteristics of different cells to trigger the measurement of GAP and switch the measurement, so as to adapt to specific conditions in different environments.

Based on the second aspect of the embodiments of the present application, in the first implementation manner of the second aspect of the embodiments of the present application, the network management server may analyze the first network signal quality parameter in multiple ways. For example, the network management server may collect samples The first network signal quality parameter of the first network is input into the cumulative distribution function to obtain the cumulative distribution function of the first network signal quality parameter, and then the value corresponding to the first network signal quality parameter is selected as the target parameter in the cumulative distribution function according to the target probability. The target probability is set as required. Assuming that the target probability is 0.8, it means that 80% of the first terminals in the sample set have values of the first network signal quality parameter corresponding to the serving cell when switching services are less than or equal to the target parameter.

In the embodiment of the present application, the network management server can control the switching condition of the terminal through the cumulative distribution function, which is beneficial for the network maintenance personnel to obtain the target parameter according to the required probability.

Based on the second aspect of the embodiments of the present application, in the second implementation manner of the second aspect of the embodiments of the present application, the network management server can process the sample set to obtain target parameters in multiple ways. For example, the network management server can calculate all the first parameters in the sample set. An average value of the network signal quality parameters to obtain the target parameters.

In the embodiment of the present application, the network management server uses the average value of all the first network signal quality parameters in the sample set as the target parameter, which improves the feasibility of the solution.

Based on the second aspect of the embodiments of the present application, in the third implementation manner of the second aspect of the embodiments of the present application, the network management server may specifically add the first redundancy to the target parameter to obtain the A2 measurement threshold when processing the target parameter. The first amount of redundancy may be related to the moving speed or channel fading of the second terminal.

In the embodiment of the present application, the specific implementation form of the processing target parameter is limited, which improves the feasibility of the solution.

Based on the third implementation manner of the second aspect of the embodiments of the present application, in the fourth implementation manner of the second aspect of the embodiments of the present application, the network management server may also obtain the A1 measurement threshold, and the A1 measurement threshold is used to determine whether the second terminal is The signal quality of the serving cell is good or bad. For example, the network management server can add a second redundancy based on the target parameter to obtain the A1 measurement threshold. The second redundancy may be related to the moving speed of the second terminal or channel fading, And the second redundancy is greater than the first redundancy. After the network management server obtains the A1 measurement threshold, the network management server may send the A1 measurement threshold to the base station.

In the embodiment of the present application, the network management server may obtain the A1 measurement threshold through the target parameter, and send the A1 measurement threshold to the base station, so that the base station can judge the signal quality of the second terminal in the serving cell through the A1 measurement threshold.

Based on the second aspect of the embodiments of the present application, in the fifth implementation manner of the second aspect of the embodiments of the present application, the first network signal quality parameter may specifically be the reference signal received power when the first terminal is handed over from the serving cell to the target cell RSRP, the target parameter may specifically be a target RSRP.

In the embodiment of the present application, the specific implementation form of the first network signal quality parameter and the target parameter is limited, which improves the feasibility of the solution.

Based on the second aspect of the embodiments of the present application, in the sixth implementation manner of the second aspect of the embodiments of the present application, the first network signal quality parameter may specifically be the reference signal received power when the first terminal is handed over from the serving cell to the target cell RSRQ, the target parameter may specifically be a target RSRQ.

Based on the second aspect of the embodiments of the present application, in the seventh implementation manner of the second aspect of the embodiments of the present application, the first network signal quality parameter may specifically be the reference signal received power when the first terminal is handed over from the serving cell to the target cell SINR, the target parameter may specifically be the target SINR.

Based on the second aspect of the embodiments of the present application, in the eighth implementation manner of the second aspect of the embodiments of the present application, the first terminal may specifically be a long-term evolution LTE terminal or a new air interface NR terminal, and the second terminal is an enhanced machine type Communication eMTC terminal.

The third aspect of the embodiments of the present application provides a handover control method, including:

When the target terminal is connected to the network, the base station can configure the measurement threshold for the target terminal. The target terminal is a terminal that needs to measure GAP for handover cells. If the base station receives a preset event, the base station configures the target terminal for measurement GAP and handover measurement. The preset event It is used to indicate that the quality of the downlink channel corresponding to the target terminal reaches the measurement threshold.

In the embodiment of this application, the base station configures the measurement threshold for the target terminal. If the base station receives a preset event, the base station configures the measurement GAP and handover measurement for the target terminal, because the preset event is used to indicate the downlink channel quality corresponding to the target terminal When the measurement threshold is reached, the measurement threshold can be automatically determined by monitoring the downlink channel quality of the target terminal to trigger the measurement GAP and switch the measurement, so as to adapt to specific conditions in different environments.

Based on the third aspect of the embodiments of the present application, in the first implementation manner of the third aspect of the embodiments of the present application, there are many ways to trigger the base station to configure the measurement GAP and handover measurement for the target terminal. For example, the base station can obtain the information reported by the target terminal. Channel quality indicator CQI, the measurement threshold can be a low threshold of the CQI value, lower than the low threshold indicates that the downlink channel quality of the target terminal is low, when the CQI value is lower than the low threshold, the base station can be triggered to be the target terminal Configure measurement GAP and switch measurement.

In the embodiment of the present application, the base station can determine whether to trigger the base station to configure the measurement GAP and handover measurement for the target terminal according to the CQI value reported by the target terminal, which saves the number of transmissions and receptions between the base station and the target terminal.

Based on the first implementation manner of the third aspect of the embodiments of the present application, in the second implementation manner of the third aspect of the embodiments of the present application, the CQI value may specifically be the instantaneous value of the CQI reported by the target terminal.

In the embodiments of the present application, the specific implementation form of the CQI value is limited, which improves the feasibility of the solution.

Based on the first implementation manner of the third aspect of the embodiments of the present application, in the third implementation manner of the third aspect of the embodiments of the present application, the CQI value may specifically be a filtered CQI value.

Based on the first implementation manner of the third aspect of the embodiments of the present application, in the fourth implementation manner of the third aspect of the embodiments of the present application, the CQI value may specifically be an average value of the CQI over a period of time.

Based on the third aspect of the embodiments of the present application, in the fifth implementation manner of the third aspect of the embodiments of the present application, there are multiple ways to trigger the base station to configure the measurement GAP and handover measurement for the target terminal. For example, the base station can determine that the target terminal schedules downlink The modulation and coding strategy MCS selected when transmitting the block. The measurement threshold is the low threshold of MCS. Below the low threshold, the downlink channel quality of the target terminal is low. When the MCS value is lower than the low threshold, the base station can be triggered to The target terminal configures the measurement GAP and handover measurement.

In the embodiment of the application, the base station can determine whether to trigger the base station to configure the measurement GAP and handover measurement for the target terminal by determining the modulation and coding strategy MCS selected when the target terminal schedules the downlink transmission block, which saves the number of transmissions and receptions between the base station and the target terminal.

Based on the third aspect of the embodiments of the present application, in the sixth implementation manner of the third aspect of the embodiments of the present application, there are multiple ways to trigger the base station to configure the measurement GAP and handover measurement for the target terminal. For example, the base station can monitor the downlink of the target terminal. Residual block error rate RBLER, the measurement threshold is the high threshold of the RBLER, higher than the high threshold indicates that the downlink channel quality of the target terminal is low, when the RBLER is higher than the high threshold, the base station can be triggered to configure the measurement GAP for the target terminal and Switch measurement.

In this embodiment of the application, the base station can determine whether to trigger the base station to configure the measurement GAP and handover measurement for the target terminal by monitoring the target terminal's downlink residual block error rate RBLER, which saves the number of transmissions and receptions between the base station and the target terminal.

Based on the third aspect of the embodiments of the present application, in the seventh implementation manner of the third aspect of the embodiments of the present application, there are multiple ways to trigger the base station to configure the measurement GAP and handover measurement for the target terminal. For example, the base station can monitor the target terminal machine type The communication physical downlink control channel MPDCCH missed detection, and the proportion of discontinuous transmission DTX is obtained. The measurement threshold is the high threshold of the DTX proportion. If the high threshold is higher, the downlink channel quality of the target terminal is low. When the DTX proportion is higher than the high threshold Within a limited time, the base station can be triggered to configure the measurement GAP and handover measurement for the target terminal.

In the embodiment of the present application, the base station can determine whether to trigger the base station to configure measurement GAP and handover measurement for the target terminal by monitoring the missed detection of the target terminal machine type communication physical downlink control channel MPDCCH, which saves the number of transmission and reception between the base station and the target terminal.

Based on the third aspect of the embodiments of the present application, in the eighth implementation manner of the third aspect of the embodiments of the present application, the target terminal may specifically be an enhanced machine type communication eMTC terminal.

In the embodiments of the present application, the specific implementation form of the target terminal is limited, which improves the feasibility of the solution.

Based on the third aspect of the embodiments of the present application, in the ninth implementation manner of the third aspect of the embodiments of the present application, the handover measurement may specifically be A3 measurement, A4 measurement, or A5 measurement.

A fourth aspect of the embodiments of the present application provides a base station, which executes the method of the foregoing first aspect or third aspect.

A fifth aspect of the embodiments of the present application provides a base station, which executes the method of the foregoing first aspect or third aspect.

The sixth aspect of the embodiments of the present application provides a network management server, and the network management server executes the method of the foregoing second aspect.

A seventh aspect of the embodiments of the present application provides a network management server, and the network management server executes the method of the foregoing second aspect.

The eighth aspect of the embodiments of the present application provides a computer storage medium that stores instructions in the computer storage medium. When the instructions are executed on a computer, the computer executes the method of the first, second, or third aspect described above.

The ninth aspect of the embodiments of the present application provides a computer software product. When the computer program product is executed on a computer, the computer executes the method of the aforementioned first aspect, second aspect, or third aspect.

Description of the drawings

Figure 1 is a network architecture diagram in an embodiment of the application;

FIG. 2 is a schematic flowchart of a handover control method in an embodiment of the application;

FIG. 3 is a schematic diagram of another flow of a handover control method in an embodiment of this application;

Fig. 4 is a schematic diagram of a cumulative distribution function in an embodiment of the application;

FIG. 5 is a schematic diagram of another flow of a handover control method in an embodiment of this application;

FIG. 6 is a schematic diagram of another flow of a handover control method in an embodiment of this application;

FIG. 7 is a schematic diagram of another flow of a handover control method in an embodiment of this application;

FIG. 8 is a schematic diagram of another flow of a handover control method in an embodiment of this application;

FIG. 9 is a schematic structural diagram of a base station in an embodiment of the application;

FIG. 10 is a schematic diagram of another structure of a base station in an embodiment of the application;

FIG. 11 is a schematic diagram of another structure of a base station in an embodiment of the application;

FIG. 12 is a schematic diagram of another structure of a base station in an embodiment of the application;

FIG. 13 is a schematic diagram of another structure of a base station in an embodiment of the application;

FIG. 14 is a schematic diagram of another structure of a base station in an embodiment of the application;

FIG. 15 is a schematic diagram of another structure of a base station in an embodiment of the application;

FIG. 16 is a schematic diagram of another structure of a base station in an embodiment of the application;

FIG. 17 is a schematic diagram of another structure of a base station in an embodiment of the application;

FIG. 18 is a schematic diagram of a structure of a network management server in an embodiment of the application;

FIG. 19 is a schematic diagram of another structure of a network management server in an embodiment of this application.

Detailed ways

Please refer to Figure 1. The network architecture in the embodiment of the present application includes:

Network management server 101, serving cell base station 102, neighboring cell base station 103, long term evolution (LTE) terminal 104, enhanced machine-type communication (eMTC) terminal 105, serving cell CELL1, neighboring cell CELL2 .

In the embodiment of this application, 102 and 103 can be serving cell base stations or neighboring cell base stations. Similarly, CELL1 and CELL2 can be serving cells or neighboring cells. Here, 102 is the serving cell base station, and 103 is the base station of the neighboring cell. As a neighboring cell base station, CELL1 is a serving cell, and CELL2 is a neighboring cell as an example for schematic illustration, and the details are not limited here.

The network management server 101 is used to manage the serving cell base station 102 and the neighboring cell base station 103.

In the embodiment of the present application, the serving cell base station 102 and the neighboring cell base station 103 may be managed by the same network management server 101, or may be managed by different network management servers, and the details are not limited here.

The serving cell CELL1 managed by the serving cell base station 102, the serving cell CELL2 managed by the neighboring cell base station 103, the serving cell CELL1 and the neighboring cell CELL2 may be cells of the same frequency or different frequency, and the details are not limited here.

The LTE terminal 104 and the eMTC terminal 105 can be handed over from the serving cell CELL1 to the neighboring cell CELL2 under the control of the serving cell base station 102.

In this embodiment of the application, 104 may be an LTE terminal. It may also be an eMTC terminal, 105 may be an eMTC terminal, or a massive machine type of communication (mMTC) terminal, which is not specifically limited here.

The embodiments of the present application can be applied to the handover of cells of the same frequency and can also be applied to the handover of cells of different frequencies. In the following process, only the cells of the same frequency are used for schematic illustration, and the details are not limited here.

The general process of cell handover is as follows:

When an eMTC terminal is connected to the network, the base station configures A2 measurement for the terminal. After the terminal reports the A2 measurement report, the base station determines that the terminal has moved to the edge of the cell, and configures measurement GAP, handover measurement, and A1 measurement for the terminal so that it can measure appropriate In the neighboring cell, if the terminal reports the handover measurement, it will issue a handover command to switch the terminal to the neighboring cell; if the terminal does not report the handover measurement, but reports the A1 measurement, the base station determines that the terminal has moved to the cell center, and the base station is the The terminal configures the measurement GAP and handover measurement to eliminate the negative impact introduced by the measurement GAP.

In the embodiment of the present application, the handover measurement may be A3 measurement or A4 measurement. It is understandable that in practical applications, the handover measurement may also be A5 measurement, which is not specifically limited here.

In conjunction with the content of FIG. 1, the embodiments of the present application provide a variety of handover control methods, which will be described separately as follows:

1. Set the measurement threshold of the second terminal based on the network signal quality parameter when the first terminal performs handover:

The first terminal in the embodiment of this application can be a terminal under the LTE network architecture, or a terminal under the eMTC network architecture or a new air interface NR terminal, and the second terminal can be a terminal under the eMTC network architecture or a mMTC network. For the terminal under the architecture, in the following process, only the first terminal is an LTE terminal and the second terminal is an eMTC terminal for schematic illustration. The eMTC terminal in the embodiment of the present application includes both bandwidth reduced low complexity, BL) terminals also include non-BL terminals that work in coverage enhancement (coverage enhancement, CE) mode, which is not specifically limited here.

In the embodiment of the present application, the base station may obtain the target parameter according to the network signal quality parameter when the first terminal performs handover, and set the measurement threshold of the second terminal according to the target parameter. In practical applications, the measurement threshold of the second terminal may be Calculated by the base station, or calculated by the network management server by the base station, as described below:

1. The base station calculates the measurement threshold of the second terminal:

Referring to FIG. 2, the handover control method in the embodiment of the present application includes:

201. The base station configures handover measurement for the first terminal;

The base station configures the measurement type of the LTE terminal through the measurement configuration information element (means config) carried in the RRC reconfiguration (connection reconfigration) message. The means config can include the following content: measurement object, report configuration report config, report standard (the standard Trigger the LTE terminal to send a measurement report, which can be periodic or a single description), report format (for example: report the number of cells), measurement identifier, quantity configuration, and measurement interval at least one of them, specifically not done here limited.

The handover measurement in the embodiment of this application can be the A3 measurement in the same-frequency handover, or the A4 or A5 measurement in the inter-frequency handover. In the following process, only the handover measurement is the A3 measurement in the same-frequency handover. Note, the details are not limited here.

The base station in the embodiment of the present application may be an LTE eNodeB or a 5G NR gNodeB, which is not specifically limited here.

202. The first terminal reports the first network signal quality parameter to the base station.

The LTE terminal performs measurement configuration on the RRC protocol side of the LTE terminal according to the measurement control issued by the base station, and sends an RRC connection reconfigration complete message to the base station to indicate that the measurement configuration is complete.

The LTE terminal performs measurement according to the content of the handover measurement control. When the handover measurement report condition is met, it will report the handover measurement report to the base station. The handover measurement report may include: the measurement identifier, the measurement result of the serving cell or the measurement result of the neighboring cell, and the second measurement result of the serving cell. A network signal quality parameter. It is understandable that the LTE terminal can also report a handover measurement report to the base station, and the handover measurement report contains the first network signal quality parameter.

In the embodiments of this application, only the first network signal quality parameter and the second network signal quality parameter are used as reference signal receiving power (RSRP) for schematic description in the embodiments of this application. It is understandable that the first network signal quality parameter and the second network signal quality parameter are used as reference signal receiving power (RSRP). The first network signal quality parameter or the second network signal quality parameter can be RSRP or reference signal receiving quality (RSRQ). In practical applications, the first network signal quality parameter or the second network signal quality parameter It may also be other parameters, for example, the first network signal quality parameter or the second network signal quality parameter may be a signal to interference plus noise ratio (SINR), which is not specifically limited here.

203. The base station records the first network signal quality parameter to obtain a sample set;

After the base station receives the RSRP reported by the LTE terminal, it records the RSRP value. Every time the LTE terminal reports, the base station can record these RSRPs locally to obtain a sample set.

204. The base station processes the first network signal quality parameter in the sample set to obtain the target parameter.

After the base station records the RSRP, the base station can process the sample set at regular intervals, or process the sample set when the RSRP has accumulated to a certain number.

Among them, the period of time can be one day or one week, and the specific period is not limited here. A certain number can be 100,000 or 1 million, which is not limited here.

The base station processes the sample set mainly in the following two ways, which are described below:

1.1. The base station uses the cumulative distribution function CDF method to process the sample set;

After the base station obtains the sample set, the base station inputs the RSRP of all LTE terminal handover moments in the sample set into the cumulative distribution function CDF, and then selects the value corresponding to the RSRP in the CDF according to the target probability as the target parameter.

In the embodiments of this application, only the target parameter is used as the target RSRP for schematic description. It can be understood that the target parameter can be the target RSRP or the target RSRQ. In practical applications, the target parameter can also be the target SINR. There is no limitation here.

For the convenience of description, the following description is combined with Figure 4, where the abscissa is the RSRP value at the time of handover of the LTE terminal in dBm, and the ordinate is the probability of RSRP in the sample set. The curve in Figure 4 is the RSRP value at the time of handover in the sample set. The probability of appearing in the sample set, assuming that the target probability is 0.8, the corresponding target RSRP value is -95dBm, as shown by the points pointed by the two arrows in Figure 4, which means that 80% of the LTE terminals in the sample set are switching The RSRP values corresponding to the serving cell are all less than or equal to -95dBm.

1.2. The base station uses the statistical average method to process the sample set;

After the base station obtains the sample set, the base station can count all RSRP values in the sample set, then calculate the average value, and use the average value as the target parameter.

In the embodiment of this application, the base station can use the CDF method to obtain the target parameters, or the statistical average method to obtain the target parameters. It is understandable that in practical applications, the base station can also use other methods to obtain the target parameters, such as: base station The maximum value in the sample set can be selected as the target parameter, which is not specifically limited here.

205. The base station processes the target parameter to obtain the A2 measurement threshold and the A1 measurement threshold;

After the base station obtains the target parameter, on the basis of the target parameter, the base station increases the first redundancy to obtain the A2 measurement threshold of the eMTC terminal, and increases the second redundancy to obtain the A1 measurement threshold of the eMTC terminal.

The first redundancy and the second redundancy can be related to the moving rate of the eMTC terminal. The faster the movement, the greater the first redundancy and the second redundancy, and it can also be related to the channel fading. The faster the channel fading, The greater the first redundancy and the second redundancy. The first redundancy and the second redundancy may be a cell-level fixed parameter, where the A1 measurement threshold is greater than the A2 measurement threshold, so the second redundancy is greater than the first redundancy.

The first redundancy and the second redundancy in this embodiment are set by the network maintenance personnel based on experience or needs. The specific values are not limited here, for example: A2 measurement threshold = target RSRP + 2dB, A1 measurement threshold = target RSRP+6dB.

206. The base station configures the A2 measurement event for the second terminal.

Because eMTC terminals usually adopt inband inband deployment, that is, co-cell deployment with LTE, eMTC and LTE are the same networking modes, so eMTC and LTE have the same switching point.

According to 3GPP TS 36.300 V13.4.0, eMTC terminals usually need to start GAP when measuring the same frequency A3. This is mainly because: in order to reduce costs, the release 13 version of eMTC terminals only support a single narrow band (narrow band, NB), that is, the receiver It only supports a maximum of 6 consecutive RBs, which makes the receiver unable to tune to the center 6RB to measure the neighboring cells. If you need to perform the same frequency A3 measurement, you need to rely on the measurement GAP mechanism so that the receiver can measure the signal quality of the neighboring cells during GAP.

In the embodiment of the present application, the GAP mode may be GAP0, and the GAP period is 40ms, or it may be GAP1, and the GAP period is 80ms, which is not specifically limited here.

In addition, A3 measurement of LTE terminal does not need to measure GAP, so LTE terminal can always configure A3 measurement, and it can measure to neighboring cells in time and perform handover. Therefore, it can count the A3 measurement reports reported by LTE terminals in the same cell for same-frequency handover. The first network signal quality parameter in, to obtain the handover point of the LTE user in the cell, and to set the A2 measurement threshold of the eMTC terminal of the cell specifically, the eMTC terminal can also use the handover record of other eMTC terminals in the same cell as a reference, Set the A2 measurement threshold.

After the eMTC terminal enters the network, the base station sends an A2 measurement event to the eMTC terminal by carrying an A2 measurement notification in a measurement control message. The A2 measurement event indicates that the signal quality of the serving cell becomes lower than the corresponding threshold, and the threshold of the A2 measurement event is the A2 measurement threshold obtained in step 205.

207. The second terminal reports an A2 measurement report to the base station.

After the base station configures the A2 measurement event for the eMTC terminal, the eMTC terminal performs measurement according to the content of the measurement control message. When the report condition of the A2 measurement event is met, the eMTC terminal reports the A2 measurement report to the base station. The A2 measurement report may include measurement ID and service The measurement quantity (RSRP, RSRQ or SINR) of the cell, the measurement quantity may be the second network signal quality parameter.

208. The base station configures measurement GAP, handover measurement, and A1 measurement event for the second terminal.

When the base station receives the A2 measurement report reported by the eMTC terminal, that is, the signal strength of the serving cell is lower than the corresponding threshold, the base station determines that the eMTC terminal has moved to the edge of the serving cell. It is necessary for the eMTC terminal to switch cells to increase the signal strength. Using A3 measurement, A3 measurement indicates that the signal quality of the neighboring cell of the serving cell is higher than the serving cell by a certain threshold. The base station uses the measurement configuration information element (means config) carried in the RRC reconfiguration message to notify the eMTC terminal of the A3 measurement configuration message, that is, Send A3 measurement control, because the A3 measurement of eMTC terminal needs to measure GAP, as described in the network framework, it is also necessary to determine whether the eMTC terminal moves to the serving cell center through A1 measurement, so that the eMTC terminal reports the A1 measurement report before configuring the measurement GAP and A3 measurement.

The base station configures the A1 measurement event for the second terminal, and the threshold of the A1 measurement event is the A1 measurement threshold obtained in step 205.

2. The network management server calculates the measurement threshold of the second terminal:

Referring to FIG. 3, the handover control method in the embodiment of the present application includes:

301. The base station configures handover measurement for the first terminal;

302. The first terminal reports the first network signal quality parameter to the base station.

Step 301 and step 302 in this embodiment are similar to step 201 and step 202 in the foregoing embodiment shown in FIG. 2 and will not be repeated here.

303. The base station sends the first network signal quality parameter to the network management server.

After receiving the first network signal quality parameter reported by the first terminal, the base station sends the first network signal quality parameter to the network management server.

304. The network management server records the first network signal quality parameter to obtain a sample set;

After the network management server receives the first network signal quality parameter of the LTE terminal sent by the base station, it records the value of the first network signal quality parameter. Each time the base station sends it, the network management server can record these first network signal quality parameters to obtain a sample set.

305. The network management server processes the first network signal quality parameter in the sample set to obtain the target parameter.

After the network management server records the first network signal quality parameter, the network management server may process the sample set at regular intervals, or may process the sample set when the first network signal quality parameter has accumulated to a certain number.

The network management server processes the sample collection mainly in the following two ways, which are described below:

2.1. The network management server uses the cumulative distribution function CDF method to process the sample collection;

After the network management server obtains the sample set, the network management server inputs the first network signal quality parameters of all LTE terminals in the sample set into the cumulative distribution function CDF, and then selects the value corresponding to the first network signal quality parameter in the CDF according to the target probability As the target parameter.

For the convenience of description, the following description is combined with Figure 4, where the abscissa is the RSRP value at the switching time, in dBm, and the ordinate is the CDF of the RSRP. The curve in Figure 4 is the probability of the RSRP value appearing in the sample set at the switching time in the sample set. , Assuming that the target probability is 0.8, the corresponding target RSRP value is -95dBm, as shown by the points pointed to by the two arrows in Figure 4, which means that 80% of the LTE terminals in the sample set have all the RSRP values corresponding to the handover of the serving cell. Less than or equal to -95dBm.

2.2. The network management server uses the statistical average method to process the sample collection;

After the network management server obtains the sample set, the network management server may count the values of all the first network signal quality parameters in the sample set, and then calculate the average value, and use the average value as the target parameter.

In the embodiments of this application, the network management server can use the CDF method to obtain the target parameters, or the statistical average method to obtain the target parameters. It is understandable that in practical applications, the network management server can also use other methods to obtain the target parameters, such as : The network management server can select the maximum value in the sample set as the target parameter, which is not limited here.

306. The network management server processes the target parameter to obtain the A2 measurement threshold and the A1 measurement threshold;

After the network management server obtains the target parameter, the network management server increases the first redundancy amount to obtain the A2 measurement threshold of the eMTC terminal on the basis of the target parameter, and increases the second redundancy amount to obtain the A1 measurement threshold of the eMTC terminal.

The first redundancy and the second redundancy can be related to the moving rate of the eMTC terminal. The faster the movement, the greater the first redundancy and the second redundancy, and it can also be related to the channel fading. The faster the channel fading, The greater the first redundancy and the second redundancy. The network management server saves the first redundancy and the second redundancy, where the A1 measurement threshold is greater than the A2 measurement threshold, so the second redundancy is greater than the first redundancy.

307. The network management server sends the A2 measurement threshold and A1 measurement threshold to the base station.

The network management server processes the target parameters to obtain the A2 measurement threshold and A1 measurement threshold, and sends the A2 measurement threshold and A1 measurement threshold to the base station;

308. The base station configures the A2 measurement event for the second terminal.

The threshold of the A2 measurement event is the A2 measurement threshold obtained in step 306.

309. The second terminal reports an A2 measurement report to the base station.

310. The base station configures measurement GAP, handover measurement, and A1 measurement event for the second terminal.

The threshold of the A1 measurement event is the A1 measurement threshold obtained in step 306.

Steps 308 to 310 in this embodiment are similar to steps 206 to 208 in the embodiment shown in FIG. 2, and are not repeated here.

2. Set the measurement threshold of the second terminal based on the following channel quality:

In the embodiment of this application, the base station can evaluate the quality of the downlink channel according to the channel quality indication (CQI) reported by the eMTC terminal, and set the measurement threshold of the eMTC terminal according to the CQI. The base station can also schedule the downlink transmission block according to the eMTC terminal. The selected modulation and coding strategy MCS evaluates the quality of the downlink channel, and sets the measurement threshold of the eMTC terminal according to the MCS. In practical applications, the base station can evaluate the quality of the downlink channel according to the residual block error rate (RBLER). And set the eMTC terminal measurement threshold according to the RBLER, the base station can also evaluate the quality of the downlink channel according to the discontinuous transmission (DTX) ratio, and set the measurement threshold of the eMTC terminal according to the DTX ratio. The following are the four cases respectively. Description:

In the embodiments of this application, the target terminal is only the eMTC terminal for schematic description. It can be understood that the target terminal may be an eMTC terminal or an LTE terminal. In practical applications, the target terminal may also be other terminals. The terminal is a terminal that needs to measure GAP when switching cells, and it is not specifically limited here.

1. Set the measurement threshold of the second terminal based on the value of the channel quality indication (CQI):

Referring to FIG. 5, the handover control method in the embodiment of the present application includes:

501. The base station configures the measurement threshold;

CQI is an important indicator for the eMTC terminal to feed back the quality of the downlink channel to the base station. So CQI can be used to trigger handover measurement.

The measurement threshold can be the low threshold of the CQI value. The low threshold is set by the network operation and maintenance personnel based on experience or needs, and the range is between 0 and 15. For example, the low threshold can be set to 2, and the specific value is not set here. limited.

It is understandable that due to fluctuations in the quality of the downlink channel, the base station generally sets a high threshold in addition to a low threshold. When the CQI value is lower than the low threshold, the downlink channel quality of the eMTC terminal is considered to be low. When the CQI value is high At a low threshold, it is considered that the downlink channel quality of the eMTC terminal is high. In the embodiment of the present application, the base station may set one threshold (low threshold), or may set two thresholds (low threshold and high threshold), which is not specifically limited here.

The base station can be configured with periodic CQI or aperiodic CQI, which is not specifically limited here.

502. The target terminal reports a channel quality indicator CQI to the base station.

Since the base station needs to determine the coding method (for example, the LTE terminal, there are three main coding methods: OPSK, 16QAM, and 64QAM), the eMTC terminal needs to feed back the CQI, and the protocol quantifies the channel quality into a sequence of 0-15.

Periodic CQI is usually reported through a physical uplink control channel (PUCCH), and aperiodic CQI is usually reported through a physical uplink shared channel (PUSCH).

The CQI value of the embodiment of this application can be obtained in multiple ways, and only three ways are schematically described below:

1.1. The value of CQI is the instantaneous value of CQI reported by the eMTC terminal;

1.2. The value of CQI is the filtered CQI value;

1.3. The CQI value is the average value of the CQI value in a period of time.

Among them, the period of time may be one second or two seconds, and the specific period is not limited here.

503. The base station configures the measurement GAP and handover measurement for the target terminal.

When the CQI value reported by the target terminal is lower than the low threshold, it indicates that the downlink channel quality of the eMTC terminal is low. The downlink channel quality of the eMTC terminal can be improved by switching cells, and the base station configures the eMTC terminal to measure GAP and handover measurement.

2. Set the measurement threshold of the second terminal based on the finally selected modulation and coding scheme (MCS):

Referring to FIG. 6, the handover control method in the embodiment of the present application includes:

601. The base station configures a measurement threshold;

The MCS table is a representation of the communication rate, and each MCS index corresponds to the physical transmission rate under a set of parameters. So MCS can be used to trigger switch measurement.

The measurement threshold can be the low threshold of the MCS value. The low threshold is set by the network operation and maintenance personnel based on experience or needs. The range is between 0 and 28. For example, the low threshold can be set to 1, and the specific value is not limited here. .

It is understandable that due to fluctuations in the quality of the downlink channel, the base station generally sets a high threshold in addition to a low threshold. When the MCS value is lower than the low threshold, the downlink channel quality of the eMTC terminal is considered to be low. When the MCS value is high At a low threshold, it is considered that the downlink channel quality of the eMTC terminal is high. In the embodiment of the present application, the base station may set one threshold (low threshold), or may set two thresholds (low threshold and high threshold), which is not specifically limited here.

602. The base station determines the modulation and coding strategy MCS selected when the target terminal schedules downlink transmission blocks;

The base station will select the MCS for link adaptation based on the CQI reported by the eMTC terminal and the acknowledgement/non-acknowledge (ACK/NACK) information of the transport block fed back by the eMTC terminal. The base station can monitor the MCS that is finally selected for scheduling the downlink transport block for the eMTC terminal. (The value ranges from 0 to 28).

603. The base station configures the measurement GAP and handover measurement for the target terminal.

When the MCS value is lower than the MCS low threshold, it indicates that the downlink channel quality of the eMTC terminal is low. The downlink channel quality of the eMTC terminal can be improved by switching cells, and the base station configures the eMTC terminal to measure GAP and handover measurement.

3. Set the measurement threshold of the second terminal based on the residual block error rate (RBLER):

Referring to FIG. 7, the handover control method in the embodiment of the present application includes:

701. The base station configures a measurement threshold;

In wireless networks, base stations send data to eMTC terminals in blocks.

The residual block error rate RBLER is the ratio of the number of blocks with errors to the number of blocks effectively transmitted after the maximum number of transmissions is reached, multiplied by 100%. Since RBLER is an important indicator of network performance and service quality, the quality of RBLER directly affects the quality of voice services and the throughput rate of data transmission services, so RBLER can be used to trigger handover measurement.

The measurement threshold may be a high threshold of RBLER. The high threshold is set by network operation and maintenance personnel based on experience or needs, and the range is between 0% and 100%. For example, the high threshold may be set to 5%.

It is understandable that due to fluctuations in the quality of the downlink channel, the base station generally sets a low threshold in addition to the high threshold. When the RBLER value is higher than the high threshold, the downlink channel quality of the eMTC terminal is considered to be low. When the RBLER value is low At a low threshold, it is considered that the downlink channel quality of the eMTC terminal is high. In the embodiment of the present application, the base station may set one threshold (high threshold), or may set two thresholds (low threshold and high threshold), which is not specifically limited here.

702. The base station monitors the downlink residual block error rate RBLER of the target terminal;

Each time the base station schedules a downlink transport block, the eMTC terminal will feedback ACK/NACK information through PUCCH/PUSCH, that is, whether the downlink transport block is received correctly.

703. The base station configures the measurement GAP and handover measurement for the target terminal.

When the RBLER value is higher than the high threshold, it is considered that the downlink channel quality of the eMTC terminal is low, and the downlink channel quality of the eMTC terminal can be improved by switching cells, and the base station configures the eMTC terminal to measure GAP and handover measurement.

4. Set the measurement threshold of the second terminal based on the discontinuous transmission (DTX) ratio:

Referring to FIG. 8, the handover control method in the embodiment of the present application includes:

801. The base station configures a measurement threshold;

The missed detection of the machine type communication physical downlink control channel (MPDCCH) of the eMTC terminal is recorded as DTX. The DTX ratio is defined as the ratio of the number of missed MPDCCH detections to the total number of MPDCCH transmissions multiplied by 100%.

The measurement threshold may be a DTX high threshold, which is set by network operation and maintenance personnel based on experience or needs, and ranges from 0% to 100%. For example, the high threshold may be set to 10%.

It is understandable that due to fluctuations in the quality of the downlink channel, the base station generally sets a low threshold in addition to a high threshold. When the DTX ratio is higher than the high threshold, the downlink channel quality of the eMTC terminal is considered to be low. When the DTX ratio is lower than the low threshold Threshold, it is considered that the downlink channel quality of the eMTC terminal is high. In the embodiment of the present application, the base station may set one threshold (high threshold), or may set two thresholds (low threshold and high threshold), which is not specifically limited here.

802. The base station monitors the missed detection of the MPDCCH of the target terminal;

After the base station sends the scheduling authorization for the downlink transport block through MPDCC, the eMTC terminal will feed back ACK/NACK information through PUCCH/PUSCH. If the eMTC terminal does not feed back the corresponding ACK/NACK information, it is considered that the eMTC terminal has missed MPDCCH detection, which is recorded as DTX .

803. The base station configures the measurement GAP and handover measurement for the target terminal.

When the DTX ratio is higher than the high threshold, it is considered that the downlink channel quality of the eMTC terminal is low, and the downlink channel quality of the eMTC terminal can be improved by switching cells, and the base station configures the eMTC terminal to measure GAP and handover measurement.

The handover control method in the embodiment of the present application is described above, and the relevant equipment corresponding to the handover control method in the embodiment of the present application is described below. In the embodiment of the present application, a base station and a network management server are provided, and the following are respectively described:

1. Base station:

1. The base station that sets the measurement threshold of the second terminal based on the network signal quality parameter when the first terminal performs handover:

Referring to FIG. 9, an embodiment of the base station in the embodiment of the present application includes:

The obtaining unit 901 is configured to obtain a first network signal quality parameter corresponding to the first terminal, where the first network signal quality parameter is related to the signal quality of the serving cell where the first terminal is located;

The obtaining unit 901 is further configured to obtain an A2 measurement threshold, where the A2 measurement threshold is obtained by processing the first network signal quality parameter;

The configuration unit 902 is configured to configure an A2 measurement threshold for the second terminal, the second terminal is a terminal that needs to measure GAP for handover cells, and the second terminal and the first terminal belong to a serving cell;

The receiving unit 903 is configured to receive the A2 measurement report reported by the second terminal;

The configuration unit 902 is further configured to configure the measurement GAP and handover measurement for the second terminal if the receiving unit 903 receives the A2 measurement report reported by the second terminal. The A2 measurement report is used to indicate the second network signal quality parameter corresponding to the second terminal The A2 measurement threshold is reached.

In this embodiment, the operations performed by each unit of the base station are similar to those described in the foregoing embodiments shown in FIG. 2 and FIG. 3, and will not be repeated here.

In this embodiment, the first network signal quality parameter corresponding to the first terminal is acquired by the acquisition unit 901, and the first network signal quality parameter is processed to obtain the A2 measurement threshold. The configuration unit 902 configures the A2 measurement threshold for the second terminal. The A2 measurement threshold is processed based on the first network signal quality parameter sent by the first terminal. The A2 measurement threshold can be automatically determined according to the characteristics of different cells to trigger the measurement of GAP and switch measurement, so as to adapt to specific conditions in different environments.

The base station can obtain the target parameter according to the network signal quality parameter when the first terminal performs handover, and set the measurement threshold of the second terminal according to the target parameter, as shown in FIG. 10, in practical applications, the measurement threshold of the second terminal It can be calculated by the base station, or it can be calculated by the network management server by the base station, as shown in Figure 11 or Figure 12, which will be explained separately below:

Referring to FIG. 10, another embodiment of the base station in the embodiment of the present application includes:

The obtaining unit 1001 is configured to obtain a first network signal quality parameter corresponding to the first terminal, where the first network signal quality parameter is related to the signal quality of the serving cell where the first terminal is located;

The obtaining unit 1001 is further configured to obtain an A2 measurement threshold, where the A2 measurement threshold is obtained by processing the first network signal quality parameter;

The configuration unit 1002 is configured to configure an A2 measurement threshold for the second terminal, the second terminal is a terminal that needs to measure GAP for handover cells, and the second terminal and the first terminal belong to the serving cell;

The receiving unit 1003 is configured to receive the A2 measurement report reported by the second terminal;

The configuration unit 1002 is further configured to configure the measurement GAP and handover measurement for the second terminal if the receiving unit 1003 receives the A2 measurement report reported by the second terminal. The A2 measurement report is used to indicate the second network signal quality parameter corresponding to the second terminal Reach the A2 measurement threshold;

The configuration unit 1004 is used to configure the measurement GAP and handover for the second terminal when the receiving unit does not receive the handover measurement report sent by the second terminal and the receiving unit receives the A1 measurement report sent by the second terminal measuring;

The recording unit 1005 is used to record the first network signal quality parameter to obtain a sample set;

The processing unit 1006 is used to process the sample set to obtain target parameters;

The adding unit 1007 is used to increase the first redundancy amount based on the target parameter to obtain the A2 measurement threshold. The first redundancy amount is related to the moving speed or channel fading of the second terminal.

Referring to FIG. 11, another embodiment of the base station in the embodiment of the present application includes:

The obtaining unit 1101 is configured to obtain a first network signal quality parameter corresponding to the first terminal, where the first network signal quality parameter is related to the signal quality of the serving cell where the first terminal is located;

The obtaining unit 1101 is further configured to obtain an A2 measurement threshold, where the A2 measurement threshold is obtained by processing the first network signal quality parameter;

The configuration unit 1102 is configured to configure an A2 measurement threshold for the second terminal, the second terminal is a terminal that needs to measure GAP for handover cells, and the second terminal and the first terminal belong to the serving cell;

The receiving unit 1103 is configured to receive the A2 measurement report reported by the second terminal;

The configuration unit 1102 is further configured to, if the receiving unit 1103 receives the A2 measurement report reported by the second terminal, configure the measurement GAP and handover measurement for the second terminal. The A2 measurement report is used to indicate the second network signal quality parameter corresponding to the second terminal Reach the A2 measurement threshold;

The de-configuration unit 1104 is used for when the receiving unit does not receive the handover measurement report sent by the second terminal, and the receiving unit receives the A1 measurement report sent by the second terminal, the de-configuring unit 1104 configures the measurement GAP and GAP for the second terminal. Switch measurement;

The sending unit 1105 is configured to send the first network signal quality parameter to the network management server;

The receiving unit 1103 is also configured to receive the A2 measurement threshold sent by the network management server, where the A2 measurement threshold is obtained by the network management server processing the first network signal quality parameter.

2. The base station that sets the measurement threshold of the second terminal based on the following channel quality:

Referring to FIG. 12, another embodiment of the base station in the embodiment of the present application includes:

The configuration unit 1201 is configured to configure a measurement threshold for a target terminal, and the target terminal is a terminal that needs to measure GAP in a handover cell;

The receiving unit 1202 is configured to receive preset events;

The configuration unit 1201 is further configured to configure the measurement GAP and handover measurement for the target terminal if the receiving unit 1202 receives a preset event. The preset event is used to indicate that the quality of the downlink channel corresponding to the target terminal reaches the measurement threshold.

Referring to FIG. 13, another embodiment of the base station in the embodiment of the present application includes:

The configuration unit 1301 is configured to configure a measurement threshold for a target terminal, and the target terminal is a terminal that needs to measure GAP in a handover cell;

The receiving unit 1302 is used to receive preset events;

The configuration unit 1301 is further configured to, if the receiving unit 1302 receives a preset event, configure measurement GAP and switch measurement for the target terminal, the preset event is used to indicate that the quality of the downlink channel corresponding to the target terminal reaches the measurement threshold;

The obtaining unit 1303 is configured to obtain the channel quality indicator CQI reported by the target terminal;

The measurement threshold is the low threshold of the CQI value, and lower than the low threshold indicates that the downlink channel quality of the target terminal is low;

The first trigger unit 1304 is used to trigger the configuration unit 1301 to configure the measurement GAP for the target terminal and switch the measurement when the CQI value is lower than the low threshold of the CQI.

Referring to FIG. 14, another embodiment of a base station in the embodiment of the present application includes:

The configuration unit 1401 is configured to configure a measurement threshold for a target terminal, and the target terminal is a terminal that needs to measure GAP in a handover cell;

The receiving unit 1402 is used to receive preset events;

The configuration unit 1401 is further configured to configure the measurement GAP and handover measurement for the target terminal if the receiving unit 1402 receives a preset event, the preset event is used to indicate that the quality of the downlink channel corresponding to the target terminal reaches the measurement threshold;

The determining unit 1403 is configured to determine the modulation and coding strategy MCS selected when the target terminal schedules downlink transmission blocks;

The measurement threshold is the low threshold of MCS, lower than the low threshold indicates that the downlink channel quality of the target terminal is low;

The second trigger unit 1404 is configured to trigger the configuration unit 1401 to configure the measurement GAP and switch the measurement for the target terminal when the value of the MCS is lower than the low threshold of the MCS.

Referring to FIG. 15, another embodiment of the base station in the embodiment of the present application includes:

The configuration unit 1501 is configured to configure a measurement threshold for a target terminal, and the target terminal is a terminal that needs to measure GAP in a handover cell;

The receiving unit 1502 is used to receive preset events;

The configuration unit 1501 is further configured to, if the receiving unit 1502 receives a preset event, configure the measurement GAP and switch measurement for the target terminal, the preset event is used to indicate that the quality of the downlink channel corresponding to the target terminal reaches the measurement threshold;

The first monitoring unit 1503 is configured to monitor the downlink residual block error rate RBLER of the target terminal;

The measurement threshold is the high threshold of RBLER, higher than the high threshold indicates that the downlink channel quality of the target terminal is low;

The third trigger unit 1504 is used to trigger the configuration unit 1501 to configure the measurement GAP and handover measurement for the target terminal when the RBLER is higher than the high threshold of the RBLER.

Referring to FIG. 16, another embodiment of the base station in the embodiment of the present application includes:

The configuration unit 1601 is configured to configure a measurement threshold for a target terminal, and the target terminal is a terminal that needs to measure GAP in a handover cell;

The receiving unit 1602 is used to receive preset events;

The configuration unit 1601 is further configured to configure the measurement GAP and switch measurement for the target terminal if the receiving unit 1602 receives a preset event, the preset event is used to indicate that the quality of the downlink channel corresponding to the target terminal reaches the measurement threshold;

The second monitoring unit 1603 is configured to monitor the missed detection of the MPDCCH physical downlink control channel of the machine type communication of the target terminal, and obtain the proportion of discontinuous transmission of DTX;

The measurement threshold is the high threshold of the DTX ratio, higher than the high threshold indicates that the downlink channel quality of the target terminal is low;

The fourth trigger unit 1604 is configured to trigger the configuration unit 1601 to configure the measurement GAP and switch the measurement for the target terminal when the DTX ratio is higher than the high threshold of the DTX ratio.

FIG. 17 is another schematic structural diagram of a base station in an embodiment of the present application. The base station 1700 may include one or more central processing units (CPU) 1701 and a memory 1705. The memory 1705 stores one or more Application or data.

Among them, the memory 1705 may be volatile storage or persistent storage. The program stored in the memory 1705 may include one or more modules, and each module may include a series of instruction operations on the server. Furthermore, the central processing unit 1701 may be configured to communicate with the memory 1705, and execute a series of instruction operations in the memory 1705 on the base station 1700.

The base station 1700 may also include one or more power supplies 1702, one or more wired or wireless network interfaces 1703, one or more input and output interfaces 1704, and/or one or more operating systems, such as Windows ServerTM, Mac OS XTM , UnixTM, LinuxTM, FreeBSDTM, etc.

The central processing unit 1701 can perform operations performed by the base station in the foregoing embodiments shown in FIG. 2 and FIG. 3, and details are not described herein again.

2. Network management server:

Referring to FIG. 18, an embodiment of the network management server in the embodiment of the present application includes:

The receiving unit 1801 is configured to receive a first network signal quality parameter sent by a base station, where the first network signal quality parameter is related to the signal quality of the serving cell where the first terminal is located;

The analysis unit 1802 is configured to analyze the first network signal quality parameter to obtain the target parameter;

The processing unit 1803 is used to process the target parameter to obtain the A2 measurement threshold;

The sending unit 1804 is configured to send the A2 measurement threshold to the base station, so that the base station configures the A2 measurement threshold for the second terminal. The second terminal is a terminal that needs to measure GAP for handover cells, and the second terminal and the first terminal belong to the serving cell.

In this embodiment, the operations performed by each unit of the network management server are similar to those described in the foregoing embodiment shown in FIG. 3, and will not be repeated here.

FIG. 19 is another schematic structural diagram of a network management server in an embodiment of the present application. The network management server 1900 may include one or more central processing units (CPU) 1901 and a memory 1905. The memory 1905 stores one or one The above application or data.

Among them, the memory 1905 may be volatile storage or persistent storage. The program stored in the memory 1905 may include one or more modules, and each module may include a series of instruction operations on the server. Furthermore, the central processing unit 1901 may be configured to communicate with the storage 1905, and execute a series of instruction operations in the storage 1905 on the network management server 1900.

The network management server 1900 may also include one or more power supplies 1902, one or more wired or wireless network interfaces 1903, one or more input and output interfaces 1904, and/or one or more operating systems, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, etc.

The central processing unit 1901 can perform operations performed by the network management server in the embodiment shown in FIG. 3, and details are not described here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or integrated. To another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), magnetic disks or optical disks and other media that can store program codes. .

Claims

A handover control method, characterized in that it comprises:

The base station obtains a first network signal quality parameter corresponding to the first terminal, where the first network signal quality parameter is related to the signal quality of the serving cell where the first terminal is located;

Acquiring, by the base station, an A2 measurement threshold, where the A2 measurement threshold is obtained by processing the first network signal quality parameter;

Configuring, by the base station, the A2 measurement threshold for a second terminal, the second terminal is a terminal that needs to measure GAP for handover cells, and the second terminal and the first terminal belong to the serving cell;

If the base station receives the A2 measurement report reported by the second terminal, the base station configures measurement GAP and handover measurement for the second terminal, and the A2 measurement report is used to indicate the second terminal corresponding to the second terminal. 2. The network signal quality parameter reaches the A2 measurement threshold.
The handover control method according to claim 1, wherein after the base station obtains the first network signal quality parameter corresponding to the first terminal, before the base station obtains the A2 measurement threshold, the method further comprises:

The base station records the first network signal quality parameter to obtain a sample set;

The base station processes the sample set to obtain the target parameter;

The base station adds a first redundancy amount on the basis of the target parameter to obtain the A2 measurement threshold, and the first redundancy amount is related to the moving speed or channel fading of the second terminal.
The handover control method according to claim 2, wherein after the base station processes the sample set, the method further comprises:

The base station adds a second redundancy amount based on the target parameter to obtain the A1 measurement threshold, the second redundancy amount is related to the moving speed or channel fading of the second terminal, and the second redundancy The margin is greater than the first redundancy;

After the base station configures the A2 measurement threshold for the second terminal, the method further includes:

The base station configures the A1 measurement threshold for the second terminal.
The handover control method according to claim 3, wherein after the base station configures the measurement GAP for the second terminal and the handover measurement, the method further comprises:

When the base station does not receive the handover measurement report sent by the second terminal, and the base station receives the A1 measurement report sent by the second terminal, the base station configures the measurement GAP and GAP for the second terminal. Switch measurement.
The handover control method according to claim 2, wherein the processing of the sample set by the base station comprises:

The base station inputs the first network signal quality parameter in the sample set into a cumulative distribution function CDF to obtain the CDF of the first network signal quality parameter;

The base station selects the value corresponding to the first network signal quality parameter in the CDF according to the target probability as the target parameter, and the target probability is set as required.
The handover control method according to claim 2, wherein the processing of the sample set by the base station comprises:

The base station calculates the average value of all the first network signal quality parameters in the sample set to obtain the target parameter.
The handover control method according to claim 1, wherein before the base station obtains the A2 measurement threshold, the method further comprises:

Sending, by the base station, the first network signal quality parameter to a network management server;

The base station receives the A2 measurement threshold sent by the network management server, where the A2 measurement threshold is obtained by the network management server processing the first network signal quality parameter.
The handover control method according to claim 1, wherein the first terminal is a long-term evolution LTE terminal or a new air interface NR terminal, and the second terminal is an enhanced machine type communication eMTC terminal.
The handover control method according to claim 2, wherein the first network signal quality parameter is the reference signal received power (RSRP) when the first terminal is handed over from the serving cell to the target cell, and the second The network signal quality parameter is RSRP, and the target parameter is target RSRP.
The handover control method according to claim 2, wherein the first network signal quality parameter is the reference signal reception quality RSRQ when the first terminal is handed over from the serving cell to the target cell, and the second The network signal quality parameter is RSRQ, and the target parameter is target RSRQ.
The handover control method according to claim 2, wherein the first network signal quality parameter is the signal to interference plus noise ratio (SINR) when the first terminal is handed over from the serving cell to the target cell, and the The second network signal quality parameter is SINR, and the target parameter is target SINR.
The handover control method according to claim 1, wherein the handover measurement is A3 measurement, A4 measurement or A5 measurement.
A handover control method, characterized in that it comprises:

The network management server receives the first network signal quality parameter sent by the base station, where the first network signal quality parameter is related to the signal quality of the serving cell where the first terminal is located;

The network management server analyzes the first network signal quality parameter to obtain a target parameter;

The network management server processes the target parameter to obtain the A2 measurement threshold;

The network management server sends the A2 measurement threshold to the base station, so that the base station configures the A2 measurement threshold for the second terminal. The second terminal and the first terminal belong to the serving cell.
The handover control method according to claim 13, wherein the network management server analyzing the first network signal quality parameter comprises:

The network management server inputs the first network signal quality parameter in the sample set into a cumulative distribution function CDF to obtain the CDF of the first network signal quality parameter;

The network management server selects the value corresponding to the first network signal quality parameter in the CDF according to the target probability as the target parameter, and the target probability is set as required.
The handover control method according to claim 13, wherein the network management server analyzing the first network signal quality parameter comprises:

The network management server calculates the average value of all the first network signal quality parameters in the sample set to obtain the target parameter.
The handover control method according to claim 13, wherein the processing of the target parameter by the network management server comprises:

The network management server adds a first redundancy amount based on the target parameter to obtain the A2 measurement threshold, and the first redundancy amount is related to the moving speed or channel fading of the second terminal.
The handover control method according to claim 16, wherein after the network management server analyzes the first network signal quality parameter, the method further comprises:

The network management server adds a second redundancy amount based on the target parameter to obtain the A1 measurement threshold, the second redundancy amount is related to the moving speed or channel fading of the second terminal, and the second The amount of redundancy is greater than the first amount of redundancy;

The network management server sends the A1 measurement threshold to the base station.
The handover control method according to claim 13, wherein the first network signal quality parameter is the reference signal received power (RSRP) when the first terminal is handed over from the serving cell to the target cell, and the target parameter Is the target RSRP.
The handover control method according to claim 13, wherein the first network signal quality parameter is the reference signal reception quality RSRQ when the first terminal is handed over from the serving cell to the target cell, and the target parameter For the target RSRQ.
The handover control method according to claim 13, wherein the first network signal quality parameter is the signal to interference plus noise ratio (SINR) when the first terminal is handed over from the serving cell to the target cell, and the The target parameter is the target SINR.
The handover control method according to claim 13, wherein the first terminal is a long-term evolution LTE terminal or a new air interface NR terminal, and the second terminal is an enhanced machine type communication eMTC terminal.
A handover control method, characterized in that it comprises:

The base station configures a measurement threshold for a target terminal, and the target terminal is a terminal that needs to measure GAP when switching cells;

If the base station receives a preset event, the base station configures measurement GAP and handover measurement for the target terminal, and the preset event is used to indicate that the quality of the downlink channel corresponding to the target terminal reaches the measurement threshold.
The handover control method according to claim 22, wherein before the base station configures the measurement GAP for the target terminal and before the handover measurement, the method further comprises:

Acquiring, by the base station, the channel quality indicator CQI reported by the target terminal;

The measurement threshold is a low threshold of the CQI value, and lower than the low threshold indicates that the downlink channel quality of the target terminal is low;

When the value of the CQI is lower than the low threshold of the CQI, trigger the steps of the base station to configure the measurement GAP for the target terminal and switch the measurement.
The handover control method according to claim 23, wherein the value of the CQI is an instantaneous value of the CQI reported by the target terminal.
The handover control method according to claim 23, wherein the value of the CQI is a filtered CQI value.
The handover control method according to claim 23, wherein the value of the CQI is an average value of the CQI in a period of time.
The handover control method according to claim 22, wherein before the base station configures the measurement GAP for the target terminal and before the handover measurement, the method further comprises:

The base station determines the modulation and coding strategy MCS selected when the target terminal schedules downlink transmission blocks;

The measurement threshold is a low threshold of the MCS, and a lower threshold indicates that the downlink channel quality of the target terminal is low;

When the value of the MCS is lower than the low threshold of the MCS, trigger the base station to configure the measurement GAP and handover measurement for the target terminal.
The handover control method according to claim 22, wherein before the base station configures the measurement GAP for the target terminal and before the handover measurement, the method further comprises:

The base station monitors the downlink residual block error rate RBLER of the target terminal;

The measurement threshold is a high threshold of the RBLER, and higher than the high threshold indicates that the downlink channel quality of the target terminal is low;

When the RBLER is higher than the high threshold of the RBLER, trigger the base station to configure the measurement GAP and handover measurement for the target terminal.
The handover control method according to claim 22, wherein before the base station configures the measurement GAP for the target terminal and before the handover measurement, the method further comprises:

The base station monitors the missed detection of the machine type communication physical downlink control channel MPDCCH of the target terminal, and obtains the proportion of discontinuous transmission of DTX;

The measurement threshold is a high threshold of the DTX ratio, and higher than the high threshold indicates that the downlink channel quality of the target terminal is low;

When the DTX ratio is higher than the high threshold of the DTX ratio, trigger the base station to configure the measurement GAP and handover measurement for the target terminal.
The handover control method according to claim 22, wherein the target terminal is an enhanced machine type communication eMTC terminal.
The handover control method according to claim 22, wherein the handover measurement is A3 measurement, A4 measurement or A5 measurement.
A base station, characterized in that it comprises:

An acquiring unit, configured to acquire a first network signal quality parameter corresponding to the first terminal, where the first network signal quality parameter is related to the signal quality of the serving cell where the first terminal is located;

The obtaining unit is further configured to obtain an A2 measurement threshold, where the A2 measurement threshold is obtained by processing the first network signal quality parameter;

A configuration unit, configured to configure the A2 measurement threshold for a second terminal, the second terminal is a terminal that needs to measure GAP for handover cells, and the second terminal and the first terminal belong to the serving cell;

A receiving unit, configured to receive the A2 measurement report reported by the second terminal;

The configuration unit is further configured to, if the receiving unit receives the A2 measurement report reported by the second terminal, configure measurement GAP and handover measurement for the second terminal, and the A2 measurement report is used to indicate the first terminal. The second network signal quality parameter corresponding to the two terminals reaches the A2 measurement threshold.
The base station according to claim 32, wherein the base station further comprises:

A recording unit, configured to record the first network signal quality parameter to obtain a sample set;

A processing unit, configured to process the sample set to obtain the target parameter;

The adding unit is configured to add a first redundancy amount based on the target parameter to obtain the A2 measurement threshold, and the first redundancy amount is related to the moving speed or channel fading of the second terminal.
The base station according to claim 33, wherein the adding unit is further configured to add a second redundancy amount based on the target parameter to obtain the A1 measurement threshold, and the second redundancy amount is The moving speed or channel fading of the second terminal is related, and the second redundancy is greater than the first redundancy;

The configuration unit is further configured to configure the A1 measurement threshold for the second terminal.
The base station according to claim 34, wherein the base station further comprises:

The configuration removal unit is configured to: when the receiving unit does not receive the handover measurement report sent by the second terminal, and the receiving unit receives the A1 measurement report sent by the second terminal, the configuration removal unit is The second terminal configures measurement GAP and handover measurement.
The base station according to claim 33, wherein the processing unit is specifically configured to input the first network signal quality parameter in the sample set into a cumulative distribution function (CDF) to obtain the first network signal quality parameter CDF;

The processing unit is specifically configured to select a value corresponding to the first network signal quality parameter in the CDF according to a target probability as the target parameter, and the target probability is set as required.
The base station according to claim 33, wherein the processing unit is specifically configured to calculate an average value of all first network signal quality parameters in the sample set to obtain the target parameter.
The base station according to claim 32, wherein the base station further comprises:

A sending unit, configured to send the first network signal quality parameter to a network management server;

The receiving unit is further configured to receive the A2 measurement threshold sent by the network management server, where the A2 measurement threshold is obtained by the network management server processing the first network signal quality parameter.
The base station according to claim 32, wherein the first terminal is a Long Term Evolution LTE terminal or a new air interface NR terminal, and the second terminal is an enhanced machine type communication eMTC terminal.
The base station according to claim 33, wherein the first network signal quality parameter is the reference signal received power (RSRP) when the first terminal is handed over from the serving cell to the target cell, and the second network signal The quality parameter is RSRP, and the target parameter is target RSRP.
The base station according to claim 33, wherein the first network signal quality parameter is the reference signal reception quality RSRQ when the first terminal is handed over from the serving cell to the target cell, and the second network signal The quality parameter is RSRQ, and the target parameter is target RSRQ.
The base station according to claim 33, wherein the first network signal quality parameter is the signal to interference plus noise ratio (SINR) when the first terminal is handed over from the serving cell to the target cell, and the second The network signal quality parameter is the SINR, and the target parameter is the target SINR.
The base station according to claim 32, wherein the handover measurement is A3 measurement, A4 measurement, or A5 measurement.
A network management server, characterized in that it comprises:

A receiving unit, configured to receive a first network signal quality parameter sent by a base station, where the first network signal quality parameter is related to the signal quality of the serving cell where the first terminal is located;

An analysis unit, configured to analyze the first network signal quality parameter to obtain a target parameter;

A processing unit for processing the target parameter to obtain the A2 measurement threshold;

The sending unit is configured to send the A2 measurement threshold to the base station, so that the base station configures the A2 measurement threshold for the second terminal. The second terminal is a terminal that needs to measure GAP for handover cells and the The second terminal and the first terminal belong to the serving cell.
The network management server according to claim 44, wherein the analysis unit is specifically configured to input the first network signal quality parameter in the sample set into a cumulative distribution function (CDF) to obtain the first network signal quality CDF of the parameter;

The analysis unit is specifically configured to select a value corresponding to the first network signal quality parameter in the CDF according to a target probability as the target parameter, and the target probability is set as required.
The network management server according to claim 44, wherein the analysis unit is specifically configured to calculate the average value of all the first network signal quality parameters in the sample set to obtain the target parameter.
The network management server according to claim 44, wherein the processing unit is specifically configured to add a first redundancy amount based on the target parameter to obtain the A2 measurement threshold, and the first redundancy amount is equal to The moving speed of the second terminal or channel fading is related.
The network management server according to claim 47, wherein the processing unit is further configured to add a second redundancy amount based on the target parameter to obtain the A1 measurement threshold, and the second redundancy amount is equal to The moving speed or channel fading of the second terminal is related, and the second redundancy is greater than the first redundancy;

The sending unit is further configured to send the A1 measurement threshold to the base station.
The network management server according to claim 44, wherein the first network signal quality parameter is the reference signal received power (RSRP) when the first terminal is handed over from the serving cell to the target cell, and the target parameter is Target RSRP.
The network management server according to claim 44, wherein the first network signal quality parameter is the reference signal reception quality RSRQ when the first terminal is handed over from the serving cell to the target cell, and the target parameter is Target RSRQ.
The network management server according to claim 44, wherein the first network signal quality parameter is the signal to interference plus noise ratio (SINR) when the first terminal is handed over from the serving cell to the target cell, and the target The parameter is the target SINR.
The network management server according to claim 44, wherein the first terminal is a long-term evolution LTE terminal or a new air interface NR terminal, and the second terminal is an enhanced machine type communication eMTC terminal.
A base station, characterized in that it comprises:

A configuration unit, configured to configure a measurement threshold for a target terminal, where the target terminal is a terminal that needs to measure GAP for handover cells;

The receiving unit is used to receive preset events;

The configuration unit is further configured to configure measurement GAP and handover measurement for the target terminal if the receiving unit receives a preset event, and the preset event is used to indicate that the quality of the downlink channel corresponding to the target terminal has reached the desired level. The measurement threshold.
The base station according to claim 53, wherein the base station further comprises:

An acquiring unit, configured to acquire the channel quality indicator CQI reported by the target terminal;

The measurement threshold is a low threshold of the CQI value, and lower than the low threshold indicates that the downlink channel quality of the target terminal is low;

The first triggering unit is used to trigger the configuration unit to configure the measurement GAP for the target terminal and switch measurement when the CQI value is lower than the low threshold of the CQI.
The base station according to claim 54, wherein the value of the CQI is an instantaneous value of the CQI reported by the target terminal.
The base station according to claim 54, wherein the value of the CQI is a filtered CQI value.
The base station according to claim 54, wherein the value of the CQI is an average value of the CQI in a period of time.
The base station according to claim 53, wherein the base station further comprises:

A determining unit, configured to determine the modulation and coding strategy MCS selected when the target terminal schedules a downlink transmission block;

The measurement threshold is a low threshold of the MCS, and a lower threshold indicates that the downlink channel quality of the target terminal is low;

The second trigger unit is configured to trigger the configuration unit to configure the measurement GAP for the target terminal and switch measurement when the value of the MCS is lower than the low threshold of the MCS.
The base station according to claim 53, wherein the base station further comprises:

The first monitoring unit is configured to monitor the downlink residual block error rate RBLER of the target terminal;

The measurement threshold is a high threshold of the RBLER, and higher than the high threshold indicates that the downlink channel quality of the target terminal is low;

The third triggering unit is configured to trigger the configuration unit to configure the measurement GAP and handover measurement for the target terminal when the RBLER is higher than the high threshold of the RBLER.
The base station according to claim 53, wherein the base station further comprises:

The second monitoring unit is used to monitor the missed detection of the machine type communication physical downlink control channel MPDCCH of the target terminal, and obtain the proportion of discontinuous transmission of DTX;

The measurement threshold is a high threshold of the DTX ratio, and higher than the high threshold indicates that the downlink channel quality of the target terminal is low;

The fourth trigger unit is configured to trigger the configuration unit to configure the measurement GAP and switch measurement for the target terminal when the DTX ratio is higher than the high threshold of the DTX ratio.
The base station according to claim 53, wherein the target terminal is an enhanced machine type communication eMTC terminal.
The base station according to claim 53, wherein the handover measurement is A3 measurement, A4 measurement, or A5 measurement.
A base station, characterized in that it comprises:

Processor, memory, bus, input and output equipment;

The processor is connected to the memory and the input output device;

The bus is connected to the processor, the memory and the input/output device respectively;

The processor executes the method according to any one of claims 1 to 12 or 22-31.
A network management server, characterized in that it comprises:

Processor, memory, bus, input and output equipment;

The processor is connected to the memory and the input output device;

The bus is connected to the processor, the memory and the input/output device respectively;

The processor executes the method according to any one of claims 13 to 21.
A computer storage medium, characterized in that instructions are stored in the computer storage medium, and when the instructions are executed on a computer, the computer executes the method according to any one of claims 1 to 31.
A computer program product, characterized in that, when the computer program product is executed on a computer, the computer executes the method according to any one of claims 1 to 31.