CN108668316B

CN108668316B - Cell switching control method and device

Info

Publication number: CN108668316B
Application number: CN201710211503.7A
Authority: CN
Inventors: 张璇
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Group Hubei Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Group Hubei Co Ltd
Priority date: 2017-03-31
Filing date: 2017-03-31
Publication date: 2021-07-06
Anticipated expiration: 2037-03-31
Also published as: CN108668316A

Abstract

The invention relates to a cell switching control method and a device, wherein the method comprises the following steps: acquiring a measurement report record MRR of user equipment UE; screening out a target cell according to the MRR and the screening condition; configuring a switching control parameter for realizing switching control based on reference receiving quality RSRQ for a target cell; acquiring a drive test index of a target cell; when the drive test index gain rises, the target cell reserves the switching control acquisition parameter; and the RSRQ of the serving cell measured by the UE and the RSRQ of the target cell measured by the UE meet the switching control condition, and the UE is switched from the serving cell to the target cell. The cell switching control method and the cell switching control device can ensure the signal intensity and the communication quality after the UE is switched to the target cell, thereby ensuring the conversation quality of the UE.

Description

Cell switching control method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a cell switching control method and apparatus.

Background

According to the current cell handover control technology, handover is mainly based on radio access technology coverage: such handover is generated in case of a User Equipment (UE) entering into other serving cells from the coverage of the current serving cell, and existing handover algorithms can be expressed as follows: the user equipment carries out measurement configuration according to measurement control issued by a source base station (eNodeB), and reports a measurement report to the source base station according to the measurement configuration, wherein the measurement report comprises information of a serving cell and an adjacent cell, such as measurement information of reference received power (RSRP); the source base station judges the switching based on the measurement report and the wireless resource management information, and determines a proper target cell to request to access the control target cell if the source base station considers that the switching is necessary; after receiving the radio resource control protocol (RRC) connection reconfiguration information of the source base station, the user equipment completes uplink synchronization with the target cell and executes a switching command.

The existing handover techniques are mainly based on a coverage handover, where when the received signal strength from a base station is lower than a set threshold, a handover procedure is initiated and the base station with the strongest received signal strength is always selected. Although the algorithm ensures the signal strength, when the user equipment is switched to the cell, the communication quality is not high because other serving cells have the condition that the signal strength is high but the actual signal quality is poor.

Disclosure of Invention

The embodiment of the invention provides a cell switching control method and a cell switching control device, which can ensure the signal intensity and the communication quality after UE is switched to a target cell, thereby ensuring the conversation quality of the UE.

In one aspect, an embodiment of the present invention provides a cell handover control method, including: acquiring MRR of UE; screening out a target cell according to the MRR and the screening condition; configuring switching control parameters for realizing switching control based on RSRQ for a target cell; acquiring a drive test index of a target cell; when the drive test index gain rises, the target cell reserves the switching control parameter; and the RSRQ of the serving cell measured by the UE and the RSRQ of the target cell measured by the UE meet the switching control condition, and the UE is switched from the serving cell to the target cell.

According to an aspect of an embodiment of the present invention, the screening conditions include: the switching success rate of the target cell is lower than 90%, the reference received power RSRP of the target cell is larger than-90 dBm, the ratio of the number of the first type sampling points to the number of all the sampling points is larger than 20%, and the RSRQ of the target cell of the first type sampling points is smaller than-14.5 dB.

According to an aspect of an embodiment of the present invention, the screening conditions include: the success rate of the target cell handover is lower than 90%, the target cell RSRP is larger than-90 dBm, and the average channel quality index CQI is smaller than 7.

According to an aspect of an embodiment of the present invention, the screening conditions include: the switching success rate of the target cell is lower than 90%, the RSRP of the target cell is larger than-90 dBm, and the average interference is larger than-100 dB.

According to an aspect of the embodiments of the present invention, the step of satisfying the handover control condition by the RSRQ of the serving cell measured by the UE and the RSRQ of the target cell measured by the UE includes:

the RSRQ of the target cell measured by the UE is larger than the RSRQ of the serving cell measured by the UE, and the duration time that the RSRQ of the target cell measured by the UE is larger than the RSRQ of the serving cell measured by the UE is larger than or equal to the trigger time.

According to an aspect of the embodiment of the present invention, the RSRQ of the target cell measured by the UE is at least 2dB greater than the RSRQ of the serving cell measured by the UE, and the trigger time is 640 ms.

In another aspect, an embodiment of the present invention provides a cell handover control apparatus, including: a first obtaining module, configured to obtain an MRR of the UE; the screening module screens out the target cell according to the MRR and the screening condition; the configuration module is used for configuring switching control parameters for realizing switching control based on reference receiving quality RSRQ for the target cell; the second acquisition module is used for acquiring the drive test index of the target cell; the judging module is used for judging the road test index gain, and when the road test index gain rises, the target cell reserves a switching control parameter; and the switching control module is used for switching and controlling the UE, the RSRQ of the serving cell measured by the UE and the RSRQ of the target cell measured by the UE meet the switching control conditions, and the UE is switched from the serving cell to the target cell.

According to another aspect of an embodiment of the present invention, the screening conditions include: the switching success rate of the target cell is lower than 90%, the RSRP is larger than-90 dBm, the ratio of the number of the first type sampling points to the number of all the sampling points is larger than 20%, and the RSRQ of the target cell of the first type sampling points is smaller than-14.5 dB.

According to another aspect of an embodiment of the present invention, the screening conditions include: the switching success rate of the target cell is lower than 90%, the RSRP is larger than-90 dBm, and the average channel quality index CQI is smaller than 7.

According to another aspect of an embodiment of the present invention, the screening conditions include: the success rate of the target cell handover is lower than 90%, the RSRP is larger than-90 dBm, and the average interference is larger than-100 dB.

According to another aspect of the embodiment of the present invention, the handover control module is further configured to:

According to another aspect of the embodiment of the present invention, the RSRQ of the target cell measured by the UE is at least 2dB greater than the RSRQ of the serving cell measured by the UE, and the trigger time is 640 ms.

According to the cell switching control method and device provided by the embodiment of the invention, the MRR of the UE is obtained, and then the data of the MRR is analyzed by using the set screening condition so as to accurately screen out the target cell which is suitable for being configured to be subjected to switching control based on RSRQ. And configuring adaptive switching control parameters based on RSRQ switching control for the target cell. The target cell after the configuration can ensure that the signal intensity of the UE switched to the target cell is high and the communication quality is good.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic flow chart of a cell switching control method according to an embodiment of the present invention.

Fig. 2 is a schematic block diagram of a cell switching control apparatus according to an embodiment of the present invention.

Fig. 3 is an exemplary diagram of changes of RSRQ before and after modification of handover control parameters of a target cell according to an embodiment of the present invention.

Fig. 4 is a diagram illustrating a variation of CQI before and after modification of handover control parameters of a target cell according to an embodiment of the present invention.

Fig. 5 is a diagram illustrating a change of a downlink rate before and after a handover control parameter of a target cell is modified according to an embodiment of the present invention.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is in no way limited to any specific configuration and algorithm set forth below, but rather covers any modification, replacement or improvement of elements, components or algorithms without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The embodiment of the invention provides a cell switching control method and a cell switching control device, aiming at the situation that the switching technology in the prior art is mainly based on the switching of signal strength and the communication quality is not high.

The main idea of the embodiment of the invention is as follows: by analyzing the data of the Measurement Report Record (MRR) of the User Equipment (UE), the target cells with poor radio quality are screened out. And then, switching control is carried out on the screened target cell by adopting a switching control mode based on Reference Signal Received Quality (RSRQ), so that the UE can be successfully and successfully switched to the target cell, the switching success rate is improved, and meanwhile, the signal intensity and the communication quality of the UE switched to the target cell are also ensured.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE), a Frequency Division Duplex (FDD) System, a Time Division Duplex (TDD), a WiMAX (Universal Mobile telecommunications System, UMTS), a world wide Microwave Access (UMTS), and the like.

It should also be understood that, in the embodiment of the present invention, a User Equipment (UE) may be referred to as a Terminal (Terminal), a Mobile Station (Mobile Station, MS), a Mobile Terminal (Mobile Terminal), and the like, and the UE may communicate with one or more core networks via a Radio Access Network (RAN), for example, the UE may be a Mobile phone (or a "cellular" phone), a computer with a Mobile Terminal, and the like, and for example, the UE may also be a portable, pocket, hand-held, computer-included, or vehicle-mounted Mobile device, which exchanges voice and/or data with the RAN.

In this embodiment of the present invention, the Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB, NB) in WCDMA, or an evolved Node B (ENB, e-NodeB) in LTE, which is not limited in this embodiment of the present invention. In general, a coverage area of a base station signal can be defined as a cell or a radio cell.

The reference received quality (RSRQ) is a measure for judging the signal quality. The RSRQ value varies with network compliance and interference. The larger the network compliance, the larger the interference, and the smaller the RSRQ value. The RSRQ is calculated as follows:

RSRQ＝RSRP*NPRB/RSSI (1)

wherein, RSRQ is reference signal received quality; RSRP is the reference signal received power; NPRB is the total number of Physical Resource Blocks (PRBs) required in the downlink transmission; RSSI is a carrier received signal strength indication.

Wherein, the RSSI is calculated as follows:

RSSI＝PPRB*NPRB*PathLoss/NSymbol (2)

wherein RSSI is a carrier received signal strength indication; the PPRB is the average transmission power of PRBs on two time slots in the system receiving bandwidth; NPRB is the total number of PRBs required in downlink transmission; PathLoss is the path loss between eNodeB and UE; NSymbol is the number of OFDM symbols on each PRB, determined by the configuration of the CP.

As can be seen by the definition of RSRQ and RSSI and the interpretation of the two formulas, the RSRQ can reflect the LTE signal quality more accurately, and a switching control mode based on the RSRQ is more suitable for being used in a poor wireless environment scene.

As shown in fig. 1, fig. 1 is a flowchart illustrating a cell handover control method 100 according to an embodiment of the present invention. The embodiment of the invention provides a cell switching control method, which comprises the following steps:

step 110: acquiring MRR of UE;

step 120: screening out a target cell according to the MRR and the screening condition;

step 130: configuring switching control parameters for realizing switching control based on RSRQ for a target cell;

step 140: acquiring a drive test index of a target cell;

step 150: when the drive test index gain rises, the target cell reserves the switching control parameter;

step 160: and the RSRQ of the serving cell measured by the UE and the RSRQ of the target cell measured by the UE meet the switching control condition, and the UE is switched from the serving cell to the target cell.

The MRR of the UE comprises cell switching success rate, switching trial times, switching success times, cell RSRQ, cell RSRP, average Channel Quality Index (CQI), interference and other data information. The MRR data of the embodiment of the present invention may be reported by one UE, or may be reported by a plurality of UEs. The cell of the embodiment of the invention refers to: the area covered by a base station or a base station subsystem, the cell within the location area is identified by the Cell Global Identity (CGI), which is a basic area of radio coverage in the network. The data of the MRR of the UE in the embodiment of the invention has very detailed network information. The configuration information of the base station in the embodiment of the invention comprises the longitude and latitude of the base station, the direction angle of the cell antenna and the frequency point number (EARFCN) of the cell. The configuration information of the cell includes a cell location area code (TAC), a 4G cell identity (ECI), and a Physical Cell Identity (PCI).

The implementation process of acquiring the MRR of the UE in the embodiment of the invention specifically comprises the following steps:

collecting a sampling time period and a sampling range of MRR of UE;

in the process of conversation, the UE can automatically report the MRR and reach an internet management system (OMC) through a base transceiver station (ENOBEB).

After the MRR is obtained, the cell handover control method 100 according to the embodiment of the present invention screens a target cell from existing cells according to the obtained MRR and a screening condition, and configures a handover control parameter for implementing handover control based on RSRQ for the screened target cell. And the target cell which completes the configuration of the switching control parameters carries out switching control on the UE based on the switching control condition of the RSRQ. Aiming at a target cell adopting switching control based on RSRQ, the value of CQI can be increased, the channel quality is improved, the downlink speed is also improved, and after the UE is switched to the target cell from the serving cell, the target cell can ensure that the signal quality of the UE is good and the communication quality is high.

Optionally, the screening condition in the embodiment of the present invention may be that the handover success rate of the target cell is lower than 90%, the RSRP of the target cell is greater than-90 dBm, and the ratio of the number of the first type sampling points to the number of all the sampling points is greater than 20%. The RSRQ of the target cell for the first type of sample point is less than-14.5 dB. The target cell screened by the screening condition is an RSRP high RSRQ difference cell. The MRR includes the number of samples for all RSRQs of the target cell and the number of samples for which RSRQ is less than-14.5 dB. The handover success rate is a percentage of the number of handover success times and the number of handover attempts.

Specifically, for a target cell with a handover success rate lower than 90%, the ratio of RSRP greater than-90 dBm, RSRQ less than-14.5 dB, and RSRQ less than-14.5 dB to all RSRQ sampling points is greater than 20%, when a handover attempt occurs to a UE, the probability of UE handover failure is high, which affects the call quality and the use experience of the UE, and when the UE is successfully handed over to the target cell, the call quality and the use experience of the UE are also affected due to poor RSRQ. After the target cell screened by the screening conditions is configured with appropriate switching control parameters for realizing switching control based on RSRQ, the switching success rate of UE can be improved, the conversation quality of the UE after successful switching is ensured, and the using experience satisfaction is improved.

Optionally, the screening condition in the embodiment of the present invention may also be that the handover success rate of the target cell is lower than 90%, the RSRP of the target cell is greater than-90 dBm, and the CQI is smaller than 7. The target cell screened out by the screening condition is an RSRP high CQI difference cell.

Specifically, for a target cell with a handover success rate lower than 90%, the RSRP is greater than-90 dBm and the CQI is less than 7, when the UE attempts handover, the probability of UE handover failure is high, which affects the call quality and the use experience of the UE, and meanwhile, when the UE successfully switches to the target cell, the CQI is small, and the channel quality is poor, which affects the stability of the UE during use. After the target cell screened by the screening conditions is configured with appropriate switching control parameters for realizing switching control based on RSRQ, the switching success rate of UE can be improved, the channel quality is kept in a good state, the stability of the UE after the switching is successful in use is ensured, and the use satisfaction is improved.

Optionally, the screening condition in the embodiment of the present invention may also be that the handover success rate of the target cell is lower than 90%, the RSRP of the target cell is greater than-90 dBm, and the average interference is greater than-100 dB. The target cell screened by the screening condition is an RSRP high-interference high cell.

Specifically, for a target cell with a handover success rate lower than 90%, the RSRP is greater than-90 dBm and the average interference is greater than-100 dB, when the UE attempts handover, the probability of UE handover failure is high, which affects the call quality and the use experience of the UE, and meanwhile, when the UE successfully switches to the target cell, the smoothness of the use process of the UE is affected due to the high interference. After the target cell screened by the screening conditions is configured with appropriate switching control parameters for realizing switching control based on RSRQ, the switching success rate of UE can be improved, meanwhile, the influence of interference is reduced, the smoothness of the use process of the UE after the switching is successful is guaranteed, and the use satisfaction is improved.

In the embodiment of the invention, after the target cell is screened out by using the screening condition, the switching control parameter is configured for the target cell. And the switching control condition after the target cell is reconfigured is that switching control is realized based on the RSRQ. For the target cell which completes the switching control parameter configuration work, the switching control condition comprises that the RSRQ of the target cell measured by the UE is larger than the RSRQ of the serving cell measured by the UE, and the duration time that the RSRQ of the target cell measured by the UE is larger than the RSRQ of the serving cell measured by the UE is larger than or equal to the trigger time.

The switching control parameter of the embodiment of the invention comprises a same-frequency switching offset value (A3offset value) and trigger time, wherein the value that the RSRQ of a target cell measured by UE is greater than the RSRQ of a serving cell measured by the UE is the A3offset value.

In a preferred embodiment, the RSRQ of the target cell measured by the UE is at least 2dB greater than the RSRQ of the serving cell measured by the UE, that is, the A3offset value is greater than or equal to 2dB, and the trigger time is 640 ms. And when the RSRQ of the target cell measured by the UE is at least 2dB greater than the RSRQ of the located serving cell and the duration time is greater than or equal to 640ms, the UE is switched to the target cell from the current located serving cell.

The switching control parameters of the embodiment of the present invention include, in addition to the above A3offset value and trigger time, an inter-frequency measurement mode, an inter-frequency measurement threshold, an intra-frequency switching mode, an A3 trigger measurement mode (RSRQ), a switching hysteresis (hystersis A3), an RSRQ filter coefficient (filtercofficienteutrarsq), and an inter-frequency switching mode.

In a preferred embodiment, the inter-frequency measurement mode of the switching control parameter is a2, the inter-frequency measurement threshold is-80 dB, the intra-frequency switching mode is A3, the trigger time is 640ms, the intra-frequency switching offset value is 2dB, the A3 switching hysteresis (hystersis A3) is 1dB, the RSRQ filter coefficient (filtercofeficientetrarresrq) is 4, and the inter-frequency switching mode is A3.

After the configuration of the handover control parameters of the target cell is completed, the handover control parameters of the target cell need to be evaluated. Namely: and acquiring a drive test index of the target cell, and measuring the gain of the drive test index. And when the gain of the drive test index is increased, the target cell evaluates and retains the configured switching control parameters. The drive test indexes of the embodiment of the invention comprise cell RSRQ, signal to noise ratio (SINR), phase quadrature amplitude modulation (64QAM) and CQI.

The cell switching control method 100 according to the embodiment of the present invention obtains the MRR, and then analyzes the MRR data using the set screening condition to accurately screen out the target cell suitable for being configured to perform switching control based on RSRQ. And configuring adaptive switching control parameters based on RSRQ switching control for the target cell. The CQI value of the target cell after the configuration of the switching control parameters is completed is increased, the channel quality is improved, the downlink rate is also improved, and the high signal intensity and the good communication quality of the UE switched to the target cell can be ensured.

As shown in fig. 2, an embodiment of the present invention further provides a cell switching control apparatus 200, including:

a first obtaining module 210, configured to obtain an MRR of the UE;

a screening module 220 for screening out the target cell according to the MRR and the screening condition;

a configuration module 230, configured to configure a handover control parameter for implementing handover control based on RSRQ for a target cell;

a second obtaining module 240, configured to obtain a drive test indicator of the target cell;

a determining module 250, configured to determine a drive test indicator gain, and when the drive test indicator gain increases, the target cell retains a handover control parameter;

and the switching control module 260 is configured to perform switching control on the UE, where the RSRQ of the serving cell measured by the UE and the RSRQ of the target cell measured by the UE satisfy a switching control condition, and the UE is switched from the serving cell to the target cell.

The cell switching control device 200 according to the embodiment of the present invention can screen a target cell from the acquired MRR data, and configure a switching control condition based on RSRQ for the target cell. And evaluating the target cell after the configuration is completed. The current handover control parameters are retained by the evaluated target cell. And when the RSRQ of the serving cell measured by the UE and the RSRQ of the target cell measured by the UE meet the switching control condition, the UE is switched from the serving cell to the target cell. The target cell controlled by switching based on RSRQ is adopted, the value of CQI can be increased, the channel quality is improved, the downlink speed is also improved, the signal quality after the UE is switched to the target cell is good, and the communication quality is high.

Optionally, the screening condition in the embodiment of the present invention may be that the handover success rate of the target cell is lower than 90%, the reference received power RSRP of the target cell is greater than-90 dBm, and the ratio of the number of the first type of sampling points to the number of all sampling points is greater than 20%. The RSRQ of the target cell for the first type of sample point is less than-14.5 dB. The target cell screened by the screening condition is a cell with high RSRP difference. The MRR includes the number of samples for all RSRQs of the target cell and the number of samples for which RSRQ is less than-14.5 dB.

Optionally, the screening condition in the embodiment of the present invention may also be that the handover success rate of the target cell is lower than 90%, the reference received power RSRP of the target cell is greater than-90 dBm, and the average channel quality indicator CQI is smaller than 7.

Specifically, for a target cell with a handover success rate lower than 90%, the RSRP is greater than-90 dBm and the CQI is less than 7, when the UE attempts handover, the probability of UE handover failure is high, which affects the call quality and the use experience of the UE, and meanwhile, when the UE successfully switches to the target cell, the CQI is small, and the channel quality is poor, which affects the stability of the UE during use. After the target cell screened by the screening conditions is configured with appropriate switching control parameters for realizing switching control based on RSRQ, the switching success rate of UE can be improved, the channel quality is enabled to be in a better condition, the stability of the UE after the switching is successful in the use process is ensured, and the use satisfaction is improved.

Optionally, the screening condition in the embodiment of the present invention may also be that the handover success rate of the target cell is lower than 90%, the reference received power RSRP of the target cell is greater than-90 dBm, and the average interference is greater than-100 dB.

The handover control parameter of the embodiment of the present invention includes an A3offset value and a trigger time, wherein the value that the RSRQ of the target cell measured by the UE is greater than the RSRQ of the serving cell measured by the UE is the A3offset value. In a preferred embodiment, the RSRQ of the target cell measured by the UE is at least 2dB greater than the RSRQ of the serving cell measured by the UE, that is, the A3offset value is greater than or equal to 2dB, and the trigger time is 640 ms. And when the RSRQ of the target cell measured by the UE is at least 2dB greater than the RSRQ of the located serving cell and the duration time is greater than or equal to 640ms, the UE is switched to the target cell from the current located serving cell.

The switching control parameters of the embodiment of the present invention include, in addition to the above A3offset value and trigger time, an inter-frequency measurement mode, an inter-frequency measurement threshold, an intra-frequency switching mode, an A3 trigger measurement mode (RSRQ), a switching hysteresis (hystersis A3), an RSRQ filter coefficient (filtercofficienteutrarsq), and an inter-frequency switching mode. In a preferred embodiment, the inter-frequency measurement mode of the switching control parameter is a2, the inter-frequency measurement threshold is-80 dB, the intra-frequency switching mode is A3, the trigger time is 640ms, the intra-frequency switching offset value is 2dB, the A3 switching hysteresis (hystersis A3) is 1dB, the RSRQ filter coefficient (filtercofeficientetrarresrq) is 4, and the inter-frequency switching mode is A3.

After the handover control parameters of the target cell are configured, the handover control parameters of the target cell need to be evaluated. And acquiring a drive test index of the target cell, and measuring and judging the gain of the drive test index. And when the gain of the drive test index is judged to be increased, the target cell evaluates and reserves the configured switching control parameters. The drive test indexes of the embodiment of the invention comprise cell RSRQ, signal to noise ratio (SINR), phase quadrature amplitude modulation (64QAM) and CQI.

As shown in fig. 3, the situation before the handover control parameter is configured in the target cell and the situation after the handover control parameter is configured in the target cell are schematically shown in the figure. The horizontal axis in the figure represents the sampled values of RSRQ and the vertical axis on the left side in figure 3 represents the segment contrast of SINR before modification. The ordinate on the right represents the segment contrast for the modified SINR. The RSRQ of the target cell is detected before the switching control parameters are configured in the target cell and after the switching control parameters are configured in the target cell, the RSRQ of the target cell after the switching control parameters are configured is obviously improved, and most of the RSRQ value is between-9.5 dB and-3.5 dB.

As shown in fig. 4, the figure schematically shows the comparison between CQI segments before the handover control parameter is configured in the target cell and CQI segments after the handover control parameter is configured in the target cell. The RSRQ before the switching control parameter is configured for the target cell and after the switching control parameter is configured for the target cell are detected, the CQI of the target cell after the switching control parameter configuration is completed is obviously changed, and the channel quality is obviously improved.

As shown in fig. 5, the comparison between the downlink rates before and after the handover control parameter is configured in the target cell is schematically shown. And detecting the downlink rates before and after the switching control parameters are configured in the target cell, and obviously improving the downlink rate of the target cell after the switching control parameters are configured in the target cell. In the figure, the downlink rate is 13Mbps before modification, and the downlink rate is 26Mbps after modification.

The cell switching control method 100 and the cell switching control device 200 according to the embodiments of the present invention obtain the MRR of the UE, and then analyze the MRR data using the set screening conditions to accurately screen out a target cell suitable for being configured to perform switching control based on RSRQ. And configuring adaptive switching control parameters based on RSRQ switching control for the target cell. The configured RSRQ of the target cell is obviously improved, the value of CQI is increased, the channel quality is correspondingly improved, the downlink rate is correspondingly improved, and the high signal strength and the good communication quality of the UE switched to the target cell can be ensured.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A cell handover control method, comprising:

acquiring a measurement report record MRR of user equipment UE;

screening out a target cell according to the MRR and the screening condition;

configuring a switching control parameter for realizing switching control based on reference receiving quality RSRQ for the target cell;

acquiring a drive test index of the target cell;

when the drive test index gain rises, the target cell reserves the switching control parameter;

the RSRQ of the serving cell measured by the UE and the RSRQ of the target cell measured by the UE meet switching control conditions, and the UE is switched from the serving cell to the target cell;

the screening conditions include: the switching success rate of the target cell is lower than 90%, the reference received power RSRP of the target cell is greater than-90 dBm, the ratio of the number of first-type sampling points to the number of all the sampling points is greater than 20%, and the RSRQ of the target cell of the first-type sampling points is less than-14.5 dB;

and/or the screening conditions comprise: the handover success rate of the target cell is lower than 90%, the RSRP of the target cell is greater than-90 dBm, and the average channel quality index CQI is less than 7;

and/or the screening conditions comprise: the success rate of the target cell handover is lower than 90%, the RSRP of the target cell is greater than-90 dBm, and the average interference is greater than-100 dB;

the RSRQ of the serving cell measured by the UE and the RSRQ of the target cell measured by the UE meet switching control conditions, and the switching control conditions comprise:

the time duration that the RSRQ of the target cell measured by the UE is larger than the RSRQ of the serving cell measured by the UE, and the RSRQ of the target cell measured by the UE is larger than the RSRQ of the serving cell measured by the UE is larger than or equal to the trigger time.

2. The cell handover control method of claim 1, wherein the RSRQ of the target cell measured by the UE is at least 2dB greater than the RSRQ of the serving cell measured by the UE, and wherein the trigger time is 640 ms.

3. A cell switching control apparatus, comprising:

a first obtaining module, configured to obtain a measurement report record MRR of a user equipment UE;

the screening module screens out a target cell according to the MRR and the screening condition;

a configuration module, configured to configure a handover control parameter for the target cell, where the handover control parameter is based on reference received quality RSRQ;

a second obtaining module, configured to obtain a drive test indicator of the target cell;

the judging module is used for judging the drive test index gain, and when the drive test index gain is increased, the target cell reserves the switching control parameter;

a handover control module, configured to perform handover control on the UE, where RSRQ of a serving cell measured by the UE and RSRQ of the target cell measured by the UE satisfy a handover control condition, and the UE is handed over from the serving cell to the target cell;

the switching control module is further configured to:

4. The cell handover control device of claim 3, wherein the RSRQ of the target cell measured by the UE is at least 2dB greater than the RSRQ of the serving cell measured by the UE, and wherein the trigger time is 640 ms.