WO2018157670A1

WO2018157670A1 - Method and system for controlling cell handover, and terminal

Info

Publication number: WO2018157670A1
Application number: PCT/CN2018/072192
Authority: WO
Inventors: 张娜
Original assignee: 中兴通讯股份有限公司
Priority date: 2017-02-28
Filing date: 2018-01-11
Publication date: 2018-09-07
Also published as: CN108513329A

Abstract

A method and system for controlling cell handover, and a terminal. The method comprises: a terminal side monitoring a signal of the current cell, and obtaining the signal quality of the current cell of the terminal side; when the signal quality of the current cell of the terminal side is less than a pre-set signal threshold value, measuring a signal of a cell around a terminal, and obtaining a measurement result; sending a measurement report to a network side according to the measurement result, and the network side determining whether to perform cell handover according to the measurement report; and after a cell handover instruction issued by the network side is received, executing cell handover.

Description

Method, terminal and system for controlling cell handover

Technical field

The present application relates to, but is not limited to, the field of communication technologies, and in particular, to a method, a terminal, and a system for controlling cell handover.

Background technique

At present, the cell handover process mainly includes the following phases: measurement control -> measurement report -> handover decision -> handover execution. During the measurement control phase, the network informs the UE (User Equipment) of the parameters for measurement by sending a control message.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

At present, network cell handover is often passive. Usually, handover is initiated because one party loses the signal. This method has a relatively large dependence on the results of network measurement. It may be that there is no timely update or short delay, so that it cannot be quickly switched to ensure communication. quality. On the other hand, after the network switching policy is determined, it is only satisfied with the needs of the network operator. With the continuous development of operators and the deepening of mutual cooperation, a single strategy cannot meet the needs of operators. For network optimization, there are problems of high cost and high risk.

Embodiments of the present invention provide a method, a terminal, and a system for controlling cell handover.

A method for controlling cell handover according to an embodiment of the present invention includes:

The terminal side monitors the current cell signal, and obtains the current cell signal quality of the terminal side;

When the current cell signal quality of the terminal side is less than the preset signal threshold, the cell signal around the terminal is measured, and the measurement result is obtained;

Sending a measurement report to the network side according to the measurement result, and determining, by the network side, whether to perform cell handover according to the measurement report;

After receiving the cell handover command sent by the network side, performing cell handover.

In an exemplary implementation manner, the step of the terminal side monitoring the current cell signal to obtain the current cell signal quality of the terminal side includes:

The terminal side monitors the current cell signal through the physical layer;

Determining whether the current cell signal is greater than or equal to a preset signal threshold compared to the last measured cell signal, and if the current cell signal is greater than or equal to the preset signal threshold, the physical cell signal is greater than or equal to the preset signal threshold. The layer reports the current cell signal quality to the upper layer.

In an exemplary implementation, the step of monitoring, by the terminal side, the current cell signal further includes:

The preset signal threshold is obtained by an adaptive learning system.

In an exemplary embodiment, the step of determining, by the network side, whether to perform cell handover according to the measurement report includes:

The network side performs cell handover according to the measurement report and combined with different services and load.

In an exemplary embodiment, the step of the network side according to the measurement report, combined with different services and load comprehensive decision whether to perform cell handover, includes:

Determining, by the network side, whether the current signal coverage condition reaches a condition of signal coverage switching according to the measurement report;

If the current signal coverage condition reaches the condition of the signal coverage switching, the cell handover instruction is sent to the terminal side, so that the terminal switches to a suitable cell;

If the current signal coverage condition does not meet the condition of the signal coverage switching, it is determined whether the terminal is in a CS (Circuit Switched) connection;

If the terminal is in the CS connection, the WCDMA (Wideband Code Division Multiple Access)/LTE (Long Term Evolution) to GSM (Global System for Mobile Communication) handover is supported. , does not support reverse switching;

If the terminal is not in the CS connection, determine whether the terminal is in a PS (Packet Switching) connection;

If the terminal is in the PS connection, it is determined whether the cell load is overloaded;

If the cell load is not overloaded, it supports GSM to WCDMA/LTE handover, and does not support reverse handover;

If the cell load is overloaded, the terminal is switched to a suitable cell by load balancing.

In an exemplary embodiment, the method further includes:

After the cell handover is completed, the current signal threshold is sent to the adaptive learning system for learning training.

In an exemplary embodiment, the terminal determines whether to measure the surrounding cells by using a cell signal measurement decision system; the cell signal measurement decision system is set in the cloud.

Embodiments of the present invention provide a computer readable storage medium storing computer executable instructions that implement the above-described method of controlling cell handover when executed by a processor. The embodiment of the invention further provides a terminal for controlling cell handover, including:

The monitoring module is configured to monitor the current cell signal of the terminal side to obtain the current cell signal quality of the terminal side;

The measurement control module is configured to: when the current cell signal quality of the terminal side is less than a preset signal threshold, measure a cell signal around the terminal to obtain a measurement result;

The report sending module is configured to send a measurement report to the network side according to the measurement result, and determine, by the network side, whether to perform cell handover according to the measurement report;

The switching module is configured to perform cell handover after receiving the cell handover command sent by the network side.

In an exemplary implementation, the monitoring module is further configured to: monitor, by the physical layer, a current cell signal; and determine whether the change of the current cell signal is greater than or equal to a preset signal threshold, The current cell signal reports the current cell signal quality to the upper layer by the physical layer compared to whether the change of the cell signal measured last time is greater than or equal to the preset signal threshold.

In an exemplary embodiment, the terminal further includes:

An adaptive learning module is configured to obtain the preset signal threshold value through an adaptive learning system.

In an exemplary embodiment, the process of determining, by the network side, whether to perform a cell handover according to the measurement report includes:

Determining, according to the measurement report, whether the current signal coverage condition reaches a condition of signal coverage switching;

If the current signal coverage condition does not reach the condition of the signal coverage switching, it is determined whether the terminal is in the CS connection;

If the terminal is in CS connection, it supports WCDMA/LTE to GSM handover, and does not support reverse handover;

If the terminal is not in the CS connection, determine whether the terminal is in the PS connection;

In an exemplary embodiment, the adaptive learning module is further configured to send the current signal threshold value to the adaptive learning system for learning training after completing the cell handover.

The embodiment of the present invention further provides a system for controlling cell handover, including: a terminal side and a network side, where:

The terminal side includes a terminal as described above;

The network side is configured to receive the measurement report reported by the terminal, determine whether to perform cell handover according to the measurement report, and send a cell handover command to the terminal side when determining to perform cell handover.

In an exemplary embodiment, the network side is further configured to perform cell handover according to the measurement report and combined with different services and loads.

In an exemplary embodiment, the network side is further configured to determine, according to the measurement report, whether a current signal coverage condition reaches a condition of signal coverage switching;

A method, a terminal, and a system for controlling cell handover according to an embodiment of the present invention, the terminal side monitors a current cell signal, and obtains a current cell signal quality of the terminal side; when the current cell signal quality of the terminal side is less than a preset signal threshold value The measurement of the cell signal around the terminal is performed, and the measurement result is obtained; the measurement report is sent to the network side according to the measurement result, and the network side determines whether to perform the cell handover according to the measurement report; after receiving the cell handover instruction sent by the network side, the cell is executed. Switch. The scheme sets the signal threshold value and monitors the cell signal quality in real time. When the signal quality reaches a certain threshold value, the surrounding cell is searched, so that the search can be performed in advance, and the party can be re-detected because there is no service. The process and time of the network signal, or can avoid the waste of resources caused by unnecessary search because of deferred search, and realize the terminal to quickly perform cell handover in the network, ensure communication quality, and improve the user experience of the terminal; In the embodiment of the present invention, the cell switching can be effectively controlled to ensure the communication quality, and the device can be measured, switched, and optimized according to the actual situation of the operator. Meet the growing needs of operators.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a schematic flowchart of a first embodiment of a method for controlling cell handover according to the present invention;

2 is a schematic diagram of a real-time signal monitoring process of a UE in an embodiment of the present invention;

3 is a schematic flowchart of a cell handover decision process in an embodiment of the present invention;

4 is a schematic flowchart of a second embodiment of a method for controlling cell handover according to the present invention;

FIG. 5 is a schematic diagram of a cell signal threshold adaptive learning process in an embodiment of the present invention; FIG.

6 is a schematic flowchart of a third embodiment of a method for controlling cell handover according to the present invention;

7 is a schematic diagram of a handover process in an embodiment of the present invention;

8 is a schematic diagram of functional modules of a fourth embodiment of a terminal for controlling cell handover according to the present invention;

FIG. 9 is a schematic diagram of functional modules of a fifth embodiment of a terminal for controlling cell handover according to the present invention.

Embodiments of the invention

The details will be described in further detail below with reference to the accompanying drawings in the embodiments of the present invention.

The main solution of the embodiment of the present invention is: by setting a signal threshold value and monitoring the cell signal quality in real time, when the signal quality reaches a certain threshold value, searching for surrounding cells, thereby reducing the cause by searching in advance One party has no service to re-detect the process and time of searching the network signal, or can avoid wasting resources because of delaying the search, causing unnecessary search; in addition, the network side can also switch according to different services and load comprehensive decision to avoid single handover. The deficiencies of the strategy are measured and switched according to the actual situation of the operator, and the switching mode is optimized to improve the user experience of the terminal.

Since the network cell handover is relatively passive, the handover is usually initiated because one party loses the signal. This method has a relatively large dependence on the network measurement result, and there is a possibility that there is no timely update or a short delay, so that the handover cannot be fast and the communication quality is guaranteed. On the other hand, after the handover strategy of a network is determined, it only satisfies the needs of the network operator. With the continuous development of operators and the deepening of mutual cooperation, a single strategy cannot meet the needs of operators. Optimizing the network is costly and risky, so it is significant to seek a fast switching strategy from the terminal side to meet the growing needs of operators.

The embodiment of the present invention provides a solution, which can reduce the process and time for re-detecting the search network signal because one party has no service, or can avoid wasting resources due to unnecessary search due to deferred search; The network side can also switch according to different services and load judgments, avoiding the shortage of a single handover strategy, measuring and switching according to the actual situation of the operator, optimizing the handover mode, and improving the user experience of the terminal.

This embodiment considers a scenario in which the B operator rents the network of the A carrier, and the network switching policy of the A operator is stipulated according to the network characteristics, but the B operator hopes that the network signal of the A operator is slightly worse. Try to switch to the B operator's network, so that using your own network, the cost is slightly lower. However, if the A operator meets the requirements of the B operator, it needs to optimize the network, which is costly and risky. For the B operator, the end user will experience poor performance. When the network signal of the A operator is relatively poor, it cannot be switched to the B operator's network, or the A network has no service, but the signal is delayed. When it is not timely, it affects the communication quality.

Therefore, if the terminal can control the cell handover in its own way without having to rely entirely on the network side, it can better serve the operator.

The solution of the embodiment of the present invention is described in detail as follows:

As shown in FIG. 1 , a first embodiment of the present invention provides a method for controlling cell handover, including steps S101 to S104.

Step S101, the terminal side monitors the current cell signal, and obtains the current cell signal quality of the terminal side.

The terminal in this embodiment mainly refers to a mobile terminal user equipment, that is, a UE.

In order to control the effective handover of the mobile terminal between cells, first, the cell signal is monitored in real time on the terminal side to obtain the current cell signal quality of the terminal side.

The terminal side monitors the current cell signal through the physical layer; determines whether the current cell signal is greater than or equal to the preset signal threshold compared to the last measured cell signal, and if the current cell signal is greater than or equal to the previous measured cell signal change The preset signal threshold is used by the physical layer to report the current cell signal quality to the upper layer.

In this embodiment, a signal threshold is preset, and the physical layer compares the detected signal with the signal threshold. When the signal changes to the signal threshold, the signal quality is reported to the upper layer, so that the signal quality can be reported in real time. Avoid inaccuracies such as delay in signal measurement or signal jitter when the network side sends measurement control messages.

As shown in FIG. 2, FIG. 2 is a schematic diagram of a real-time signal monitoring process of the UE.

First, the UE physical layer internally measures the network signal, and monitors the cell signal in real time, and the physical layer monitors the channel quality in real time, and sets the signal threshold delta.

After obtaining the measurement result, compare the step size of the signal change. If the current signal is greater than or equal to the delta of the previous measurement result, the measurement result is reported to the upper layer. If the previous comparison of the signal is less than delta, the UE does not. Do any processing.

The signal threshold delta is configurable at the terminal, so that the operator can control the sensitivity of the signal to meet the signal sensitivity requirements of different networks. If the signal is required to be accurately reported, the delta can be set smaller. If the signal reporting requirements are less precise, it can be set larger.

When the signal change reaches the signal threshold delta, the signal quality Q is actively reported to the upper layer. Therefore, the signal quality can be reported actively in real time, so as to avoid inaccuracies such as delay of signal measurement or signal jitter when the network sends measurement control messages.

Step S102: When the current cell signal quality of the terminal side is less than the preset signal threshold, the cell signal around the terminal is measured, and the measurement result is obtained.

After obtaining the current cell signal quality on the terminal side, comparing the current cell signal quality of the terminal side with the preset signal threshold value, when the current cell signal quality of the terminal side is less than the preset signal threshold value, the cell signal surrounding the terminal is initiated. The measurement may be performed in advance when the measurement control message is not sent by the network side, so that the handover may be initiated due to the loss of the service, resulting in slow handover or handover failure; or when the network side sends a measurement control message. When the signal quality Q is greater than the signal threshold, the terminal may not initiate measurement, thereby not wasting resources.

As mentioned above, the cell handover process mainly includes the following phases: measurement control -> measurement report -> handover decision -> handover execution. In the measurement control phase, the network side informs the UE of the parameters for measurement by sending a control message.

After the network sends a Measurement Control message to the UE, the UE performs the corresponding measurement action according to the measurement control information included in the Measurement Control message.

There are two ways for the UE to send UE measurement control information: one is to broadcast information through the system, and the other is to send measurement control messages through a dedicated logical channel. In this way, the dependence on the network measurement is relatively large. If the network side indicates that the measurement by the UE is not supported by the UE, or the measurement control configuration is incomplete, the UE receives the invalid measurement control message. In the embodiment of the present invention, by introducing a signal threshold, when the current cell signal quality on the terminal side is less than the preset signal threshold, the measurement of the cell signal around the terminal is initiated, and the above problem can be avoided.

For the measurement report, since the channel environment of the terminal changes from time to time, the control part of the radio resource management function is implemented in the RRC (Radio Resource Control) part of the network side, and the network side does not Knowing the current wireless environment of the mobile terminal, it is necessary to establish a measurement reporting mechanism, so that the terminal can report the current channel situation to the network side.

As an implementation manner, the signal threshold value in this embodiment may be set as needed, or may be configured in an adaptive manner.

It should be noted that, in this embodiment, when the current cell signal quality on the terminal side is less than the preset signal threshold, the cell signal around the terminal is measured; and the current cell signal quality on the terminal side is greater than or equal to the preset signal. When the threshold is used, the cell signal around the terminal is not measured. Even at this time, the network side has issued a measurement control message.

That is, when the measurement control message is sent by the network side or the measurement control message is not sent by the network side, if the current cell signal quality of the terminal side is greater than or equal to the preset signal threshold, the terminal does not measure the surrounding cell signal.

This embodiment can perform the above-described decision process by an independent cell signal measurement decision system. The cell signal measurement and decision system can be set locally or in the cloud.

The cell signal measurement decision system is configured to determine whether the terminal measures the surrounding cells. The determined threshold value Tthreshold can be obtained from an adaptive learning system. When the cell signal quality Q is lower than the threshold Tthreshold, and the network side has not sent the measurement control message, the measurement is started in advance, so as to avoid the handover due to the loss of the service, resulting in slow handover or handover failure; When the message is controlled, and the signal quality Q is greater than Tthreshold, the terminal may not initiate measurement, thereby not wasting resources.

Step S103: Send a measurement report to the network side according to the measurement result, and determine, by the network side, whether to perform cell handover according to the measurement report.

Step S104: After receiving the cell handover instruction sent by the network side, perform cell handover.

After measuring the measurement result of the cell signal around the terminal, the terminal side sends a measurement report to the network side according to the measurement result, and the network side determines whether to perform cell handover according to the measurement report.

In this embodiment, in the embodiment, when determining whether to perform cell handover, the network side determines whether to perform cell handover according to a network radio resource management policy and combined with different services and load.

Among them, combined with different services and load comprehensive decision whether to perform cell handover is mainly considered:

For different services, it is more desirable to facilitate the switching of services. For example, in voice services, older operators may prefer to make full use of the already well-established GSM network, while new operators may prefer to use the newly deployed LTE network; for data services, operators may prefer to use WCDMA networks. Or LTE network; based on load-based handover, the network resources of each network can be fully utilized.

First, the network side determines, according to the measurement report, whether the current signal coverage condition reaches a condition of signal coverage switching;

The cell handover decision procedure is as shown in FIG. 3, and can be implemented based on the cell handover decision system:

The cell handover decision system not only considers the signal coverage, but also makes decisions based on the traffic and load conditions. If the condition of the signal coverage handover is reached, the UE switches to the appropriate cell; if not, it determines whether the UE is in the CS connection, that is, the voice service. If the voice service is being carried out, WCDMA/LTE to GSM handover is supported, and reverse handover is not necessarily supported. Because the GSM signal coverage is already good for operators with GSM, there is no need to switch a call in the GSM system to the WCDMA system by means of inter-system handover. In this way, the GSM system does not need to be upgraded, avoiding frequent ping-pong switching, and reducing signaling interaction between WCDMA and GSM systems.

If the UE is in the PS connection, that is, the data service, if the cell load is not overloaded, the GSM to WCDMA/LTE handover is supported, and the reverse handover is not necessary, which ensures a high data connection. If the cell is overloaded, it will switch to the appropriate cell through load balancing to maximize the utilization of the network.

Through the above technical solutions, fast switching can be implemented in an increasingly complex network environment, and the user experience is improved.

In the solution of the embodiment, the signal threshold is set and the signal quality of the cell is monitored in real time. When the signal quality reaches a certain threshold, the surrounding cell is searched, thereby searching in advance, thereby reducing the fact that one party has no service. Re-detecting the process and time of searching the network signal, or avoiding wasting resources due to deferred search, causing unnecessary search, and realizing the terminal to quickly perform cell handover in the network, ensuring communication quality and improving the user experience of the terminal; The network side can also perform the decision switching according to different services and loads, and avoid the deficiencies of the single switching policy. In the embodiment of the present invention, the cell switching is effectively controlled to ensure the communication quality, and the measurement, switching, and optimization are performed according to the actual situation of the operator. The switching mode meets the needs of the growing operators, thereby improving the user experience of the terminal.

As shown in FIG. 4, the second embodiment of the present invention provides a method for controlling cell handover. The method further includes: before the step S101, the method further includes:

Step S100: Obtain the preset signal threshold value by using an adaptive learning system.

Compared with the foregoing embodiment, the solution of the embodiment further includes a solution for obtaining a preset signal threshold by using an adaptive learning algorithm.

When implemented, it can be implemented by a cell handover signal threshold adaptive learning system.

The algorithm formula can be as follows:

T _k+1 =T _k +σ; where:

σ is a correction function, and its value directly affects whether the algorithm converges or converges. For example, after each successful handover, the switching threshold is increased by σ until the system has no service before the handover, and the threshold is reached at this time.

T is the signal threshold, T _k+1 is the next signal threshold, T _k is the current signal threshold, and K is a positive integer. After each successful handover, T is recorded and mediated by the correction function. becoming steady. As shown in FIG. 5, the initial value T0 of the system is an empirical value. After each handover measurement is initiated, the current threshold value Tk is taken as a new sample and sent to the learning system for training, and the result is the next signal. The threshold value is adjusted by the correction function and finally stabilizes to reach the maximum value Tmax.

In this way, by the adaptive method, it is possible to determine whether to perform handover measurement according to the network condition, and no longer rely on the network, thereby reducing the network load. Moreover, on the basis of mutual cooperation between operators, it is not necessary to optimize the operator network in a wide range and reduce costs.

For example, the network A rents the network of the network B. On the network B, the switching strategy used by the operator is that it is difficult to switch to other networks, and as the A operator, in order to use more of its own network, the cost is reduced. It is easier to switch to the A network so that measurements can be taken in advance so that they can be switched as quickly as possible without being bound by Network B. The threshold is adaptively adjusted, and after stabilization, the ping-pong effect can be prevented to the utmost.

As an embodiment, the above correction function is σ=α*(-1) ⁱ 1/e ^k ; wherein:

Each time the network sends a switching instruction, the value of i is even, otherwise the value of i is an odd number. α is the calibration factor, the default is 1, used to adjust the convergence step, K is a positive integer, used to adjust the convergence speed, and e is the base of the natural logarithm.

When the measurement of the surrounding cell is performed, and the threshold of the preset signal obtained by the adaptive learning algorithm is used, when the cell signal quality Q is lower than the threshold threshold, and the network side has not issued the measurement control message, the system starts early. The measurement is performed to prevent the switch from being initiated due to the loss of the service, resulting in a slow handover or a handover failure. When the network side sends a measurement control message and the signal quality Q is greater than the threshold, the terminal may not initiate measurement, thereby not wasting resources. Threshold is a process of adaptive learning, which enables it to converge quickly under a certain network and avoid ping-pong effects.

For example, the network A rents the network of the network B. On the network B, the switching strategy used by the operator is that it is difficult to switch to other networks, and as the A operator, in order to use more of its own network, the cost is reduced. It is easier to switch to the A network so that measurements can be taken in advance so that they can be switched as quickly as possible without being bound by Network B.

In this embodiment, the signal threshold is obtained by using an adaptive algorithm. When the current cell signal quality of the terminal side is less than the preset signal threshold, the cell signal around the terminal is measured, and the measurement result is obtained; and the measurement result is sent to the network side. The measurement report determines whether the cell handover is performed according to the measurement report by the network side. After receiving the cell handover command sent by the network side, the cell handover is performed. The scheme sets the signal threshold value and monitors the cell signal quality in real time. When the signal quality reaches a certain threshold value, the surrounding cell is searched, so that the search can be performed in advance, and the party can be re-detected because there is no service. The process and time of the network signal, or delay the search, avoid unnecessary search and waste resources, and at the same time, according to different services and load comprehensive decision switching, to avoid the lack of a single switching strategy.

The switching signal threshold adaptive learning system can be placed in the cloud, and is not limited to a single terminal. Each terminal puts its switching threshold in the network to the cloud for learning training, so that the sample size is large and the training is fast. The convergence is faster.

As shown in FIG. 6, the third embodiment of the present invention provides a method for controlling cell handover. The method further includes:

Step S105, after completing the cell handover, send the current signal threshold value to the adaptive learning system for learning training.

The switching process of this embodiment can be referred to FIG. 7, and the steps are as follows:

1: The signal event monitoring system monitors the signal and reports the signal strength Q;

2: The cell signal measurement decision system compares the signal strength Q with a threshold value threshold. Threshold is obtained from an adaptive learning system. If the signal strength Q is greater than or equal to threshold, the neighboring cell is not measured, and the network waits for the measurement control message to be sent. If it is less than the threshold, the neighboring cell is started to perform measurement. Threshold reaches stability through adaptive learning;

3: The measurement system measures surrounding cell signals;

4: The UE sends a measurement report;

5: The cell decision system decides whether to switch;

6: The terminal performs the corresponding handover. Then, the signal threshold threshold is sent to the adaptive learning system for learning training.

The above process implements a terminal handover scheme.

Embodiments of the present invention provide a computer readable storage medium storing a computer executable instruction that implements the above method of controlling cell handover when executed by a processor. As shown in FIG. 8, the fourth embodiment of the present invention provides a terminal for controlling cell handover, including: a monitoring module 201, a measurement control module 202, a report sending module 203, and a switching module 204, where:

The monitoring module 201 is configured to monitor the current cell signal of the terminal side, and obtain the current cell signal quality of the terminal side;

The measurement control module 202 is configured to: when the current cell signal quality of the terminal side is less than a preset signal threshold, measure a cell signal around the terminal to obtain a measurement result;

The report sending module 203 is configured to send a measurement report to the network side according to the measurement result, and determine, by the network side, whether to perform cell handover according to the measurement report;

The switching module 204 is configured to perform cell handover after receiving the cell handover instruction sent by the network side.

In an exemplary implementation, the monitoring module 201 is further configured to: monitor, by the physical layer, a current cell signal; and determine, by the physical layer, whether the change of the last measured cell signal is greater than or equal to a preset signal threshold, If the change of the current cell signal is greater than or equal to the preset signal threshold, the physical layer reports the current cell signal quality to the upper layer.

The terminal in this embodiment is mainly a mobile terminal user equipment, that is, a UE.

For the measurement report, since the channel environment of the terminal changes from time to time, and the control part of the radio resource management function is implemented in the RRC part of the network side, from the network side, the network side does not know the current wireless environment of the mobile terminal. Therefore, it is necessary to establish a measurement reporting mechanism to enable the terminal to report the current channel condition to the network side.

The cell handover decision procedure is as shown in FIG. 3, and can be implemented based on a cell handover decision system:

As shown in FIG. 9, the fifth embodiment of the present invention provides a terminal for controlling cell handover, and the terminal further includes:

The adaptive learning module 200 is configured to obtain the preset signal threshold value through an adaptive learning system.

The algorithm formula can be as follows:

T _k+1 =T _k +σ; where:

T is the signal threshold, T _k+1 is the next signal threshold, T _k is the current signal threshold, and K is a positive integer. After each successful handover, T is recorded and mediated by the correction function. becoming steady. As shown, the initial value T0 of the system is an empirical value 5, each initiating handover measurements, the current threshold value T _k as a new sample into the learning system is trained, the results obtained for the next The signal threshold is adjusted by the correction function and finally stabilizes to reach the maximum value Tmax.

In this way, through the adaptive method, it is possible to determine whether to perform handover measurement according to the network condition, instead of relying on the network, and reducing the network load. Moreover, on the basis of mutual cooperation between operators, it is not necessary to optimize the operator network in a wide range and reduce costs.

In an exemplary embodiment, the adaptive learning module 200 is further configured to send the current signal threshold value to the adaptive learning system for learning training after completing the cell handover.

3: The measurement system measures surrounding cell signals;

4: The UE sends a measurement report;

5: The cell decision system decides whether to switch;

The above process implements a terminal handover scheme.

In addition, the embodiment of the present invention further provides a system for controlling cell handover, including: a terminal side and a network side, where:

The terminal side includes the terminal described in the foregoing embodiment;

In an exemplary embodiment, the network side is further configured to perform cell handover according to the measurement report and combined with different services and load, including:

For the process of the terminal-side and the network-side interaction control cell handover in this embodiment, reference may be made to the foregoing embodiments, and details are not described herein again.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and functional blocks/units of the methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical The components work together. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer readable medium, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules or other data. Sex, removable and non-removable media. Computer storage media include, but are not limited to, Random Access Memory (RAM), Read-Only Memory (ROM), and Electrically Erasable Programmable Read-only Memory (EEPROM). Flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical disc storage, magnetic cassette, magnetic tape, disk storage or other magnetic storage device, or Any other medium used to store the desired information and that can be accessed by the computer. Moreover, it is well known to those skilled in the art that communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media. .

A person skilled in the art can understand that the technical solutions of the present application can be modified or equivalent, without departing from the spirit and scope of the technical solutions of the present application, and should be included in the scope of the claims of the present application.

Industrial applicability

By effectively controlling the cell handover, ensuring the communication quality, measuring and switching according to the actual situation of the operator, optimizing the handover mode, meeting the needs of the growing operators, and improving the user experience of the terminal.

Claims

A method for controlling cell handover includes:

The terminal side monitors the current cell signal, and obtains the current cell signal quality of the terminal side;

When the current cell signal quality of the terminal side is less than the preset signal threshold, the cell signal around the terminal is measured, and the measurement result is obtained;

Sending a measurement report to the network side according to the measurement result, and determining, by the network side, whether to perform cell handover according to the measurement report;

After receiving the cell handover command sent by the network side, performing cell handover.
The method according to claim 1, wherein the step of monitoring the current cell signal by the terminal side to obtain the current cell signal quality of the terminal side comprises:

The terminal side monitors the current cell signal through the physical layer;

Determining whether the change of the current cell signal is greater than or equal to a preset signal threshold, and if the change of the current cell signal is greater than or equal to a preset signal threshold, The current cell signal quality is reported by the physical layer to the upper layer.
The method according to claim 1, wherein the step of monitoring the current cell signal by the terminal side further comprises:

The preset signal threshold is obtained by an adaptive learning system.
The method according to claim 1, 2 or 3, wherein the step of the network side determining whether to perform cell handover according to the measurement report comprises:

The network side performs cell handover according to the measurement report and combined with different services and load.
The method according to claim 4, wherein the step of the network side according to the measurement report combined with different services and load comprehensive decision whether to perform cell handover includes:

Determining, by the network side, whether the current signal coverage condition reaches a condition of signal coverage switching according to the measurement report;

If the current signal coverage condition reaches the condition of the signal coverage switching, the cell handover instruction is sent to the terminal side, so that the terminal switches to a suitable cell;

If the current signal coverage condition does not reach the condition of signal coverage switching, it is determined whether the terminal is in a circuit-switched CS connection;

If the terminal is in CS connection, it supports wideband code division multiple access WCDMA/long-term evolution LTE to global mobile communication system GSM handover, and does not support reverse handover;

If the terminal is not in the CS connection, determine whether the terminal is in a packet switched PS connection;

If the terminal is in the PS connection, it is determined whether the cell load is overloaded;

If the cell load is not overloaded, it supports GSM to WCDMA/LTE handover, and does not support reverse handover;

If the cell load is overloaded, the terminal is switched to a suitable cell by load balancing.
The method of claim 3, further comprising:

After the cell handover is completed, the current signal threshold is sent to the adaptive learning system for learning training.
The method according to claim 1, 2 or 3, wherein the terminal determines whether to measure the surrounding cells by the cell signal measurement decision system; the cell signal measurement decision system is set in the cloud.
A terminal for controlling cell handover includes:

The monitoring module is configured to monitor the current cell signal of the terminal side to obtain the current cell signal quality of the terminal side;

The measurement control module is configured to: when the current cell signal quality of the terminal side is less than a preset signal threshold, measure a cell signal around the terminal to obtain a measurement result;

The report sending module is configured to send a measurement report to the network side according to the measurement result, and determine, by the network side, whether to perform cell handover according to the measurement report;

The switching module is configured to perform cell handover after receiving the cell handover command sent by the network side.
The terminal according to claim 8, wherein

The monitoring module is further configured to: monitor the current cell signal by using a physical layer; and determine whether the current cell signal is greater than or equal to a preset signal threshold compared to the last measured cell signal, if the current cell signal is compared When the measured change of the cell signal is greater than or equal to the preset signal threshold, the physical layer reports the current cell signal quality to the upper layer.
The terminal according to claim 8, further comprising:

An adaptive learning module is configured to obtain the preset signal threshold value through an adaptive learning system.
A terminal according to claim 8, 9 or 10, wherein

The process of determining, by the network side, whether to perform cell handover according to the measurement report includes:

Determining, according to the measurement report, whether the current signal coverage condition reaches a condition of signal coverage switching;

If the current signal coverage condition reaches the condition of the signal coverage switching, the cell handover instruction is sent to the terminal side, so that the terminal switches to a suitable cell;

If the current signal coverage condition does not reach the condition of signal coverage switching, it is determined whether the terminal is in a circuit-switched CS connection;

If the terminal is in CS connection, it supports wideband code division multiple access WCDMA/long-term evolution LTE to global mobile communication system GSM handover, and does not support reverse handover;

If the terminal is not in the CS connection, determine whether the terminal is in a packet switched PS connection;

If the terminal is in the PS connection, it is determined whether the cell load is overloaded;

If the cell load is not overloaded, it supports GSM to WCDMA/LTE handover, and does not support reverse handover;

If the cell load is overloaded, the terminal is switched to a suitable cell by load balancing.
The terminal according to claim 10, wherein

The adaptive learning module is further configured to send the current signal threshold value to the adaptive learning system for learning training after completing the cell handover.
A system for controlling cell handover includes: a terminal side and a network side, where:

The terminal side includes the terminal according to any one of claims 8-12;

The network side is configured to receive the measurement report reported by the terminal, determine whether to perform cell handover according to the measurement report, and send a cell handover command to the terminal side when determining to perform cell handover.
The system of claim 13 wherein

The network side is further configured to perform cell handover according to the measurement report and combined with different services and loads.
The system of claim 14 wherein

The network side is further configured to determine, according to the measurement report, whether a current signal coverage condition reaches a condition of signal coverage switching;

If the current signal coverage condition reaches the condition of the signal coverage switching, the cell handover instruction is sent to the terminal side, so that the terminal switches to a suitable cell;

If the current signal coverage condition does not reach the condition of the signal coverage switching, it is determined whether the terminal is in the CS connection;

If the terminal is in CS connection, it supports WCDMA/LTE to GSM handover, and does not support reverse handover;

If the terminal is not in the CS connection, determine whether the terminal is in the PS connection;

If the terminal is in the PS connection, it is determined whether the cell load is overloaded;

If the cell load is not overloaded, it supports GSM to WCDMA/LTE handover, and does not support reverse handover;

If the cell load is overloaded, the terminal is switched to a suitable cell by load balancing.
A computer readable storage medium storing computer executable instructions that, when executed by a processor, implement the method of controlling cell handover as claimed in any one of claims 1-7.