CN113615245A

CN113615245A - Switching control method, device, equipment and storage medium

Info

Publication number: CN113615245A
Application number: CN201980092590.6A
Authority: CN
Inventors: 杨宁
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2021-11-05
Anticipated expiration: 2039-08-06
Also published as: CN113615245B; WO2021022489A1

Abstract

A switching control method, device, equipment and storage medium belong to the technical field of communication. The method comprises the following steps: the first network equipment sends first configuration information to the terminal (401); the terminal sends a first signal (402) according to the first configuration information; the first network equipment sends measurement indication information to a second network equipment, wherein a is a positive integer (403); and the second network equipment measures the first signal sent by the terminal according to the measurement indication information to obtain a first measurement result, and the first measurement result is used for deciding whether to switch the network equipment connected with the terminal or not (404). The method ensures the reliability of switching and data transmission on one hand, and reduces the switching time delay and the signaling overhead of an air interface on the other hand.

Description

Switching control method, device, equipment and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method, an apparatus, a device, and a storage medium for handover control.

Background

In a mobile communication system, due to the mobility of the terminal, the terminal may switch between different serving cells, i.e. establish connections with different base stations.

Currently, the handover schemes employed by cellular communication networks are as follows: a source base station configures a measurement downlink reference signal for a terminal, and the terminal can measure and report the downlink reference signal according to the configuration of the source base station; the source base station sends a switching request message to the target base station based on the measurement result reported by the terminal, wherein the switching request message is used for requesting the terminal to be switched from the source base station to the target base station; after the target base station agrees with the switching request message, the source base station sends a switching command to the terminal, wherein the switching command is used for indicating the terminal to be switched from the source base station to the target base station; after receiving the switching command, the terminal disconnects with the source base station and initiates a random access flow to the target base station to establish connection with the target base station, thereby completing the switching from the source base station to the target base station.

For an NTN (Non Terrestrial Network) system, a satellite communication mode is generally adopted to provide communication service for a ground user, the transmission delay of a wireless signal between a terminal and a satellite is large, and the satellite has a characteristic of fast movement relative to the ground.

Disclosure of Invention

The embodiment of the application provides a switching control method, a switching control device, a switching control apparatus and a storage medium, which can be used for solving the technical problem. The technical scheme is as follows:

in one aspect, an embodiment of the present application provides a handover control method, where the method includes:

the method comprises the steps that first network equipment sends first configuration information to a terminal, wherein the first configuration information is used for indicating sending configuration of a first signal;

the first network device sends measurement indication information to a second network devices, where the measurement indication information is used to indicate the second network devices to measure the first signal sent by the terminal, so as to obtain a first measurement result, and the first measurement result is used to decide whether to switch the network device connected to the terminal, where a is a positive integer.

In another aspect, an embodiment of the present application provides a handover control method, where the method includes:

the second network equipment receives measurement indication information sent by the first network equipment;

and the second network equipment measures a first signal sent by the terminal according to the measurement indication information to obtain a first measurement result, and the first measurement result is used for deciding whether to switch the network equipment connected with the terminal.

a terminal receives first configuration information, wherein the first configuration information is used for indicating the sending configuration of a first signal;

the terminal sends the first signal according to the first configuration information;

and the measurement result of the first signal is used for a network side to decide whether to switch the network equipment connected with the terminal.

a first network device receives a measurement result of a downlink reference signal sent by a terminal;

the first network equipment sends a switching request message to at least one second network equipment according to the measurement result, wherein the switching request message is used for requesting to switch the terminal to the at least one second network equipment;

the first network device receives a handover confirmation message sent by a target second network device of the at least one second network device, wherein the handover confirmation message is used for confirming that the terminal is handed over to the target second network device;

and the first network equipment does not send a switching command to the terminal under the condition that the first network equipment confirms that the target second network equipment meets the specified condition.

In another aspect, an embodiment of the present application provides a handover control apparatus, which is applied to a first network device, and the apparatus includes:

a configuration information sending module, configured to send first configuration information to a terminal, where the first configuration information is used to indicate a sending configuration of a first signal;

a measurement indication sending module, configured to send measurement indication information to a second network devices, where the measurement indication information is used to indicate the second network devices to measure the first signal sent by the terminal, so as to obtain a first measurement result, and the first measurement result is used to decide whether to switch the network device connected to the terminal, where a is a positive integer.

In another aspect, an embodiment of the present application provides a handover control apparatus, which is applied to a second network device, where the apparatus includes:

a measurement indication receiving module, configured to receive measurement indication information sent by a first network device;

and the uplink signal measurement module is used for measuring a first signal sent by the terminal according to the measurement indication information to obtain a first measurement result, and the first measurement result is used for deciding whether to switch the network equipment connected with the terminal.

In another aspect, an embodiment of the present application provides a handover control apparatus, which is applied to a terminal, and the apparatus includes:

a configuration information receiving module, configured to receive first configuration information, where the first configuration information is used to indicate a sending configuration of a first signal;

an uplink signal sending module, configured to send the first signal according to the first configuration information;

a measurement result receiving module, configured to receive a measurement result of a downlink reference signal sent by a terminal;

a handover request sending module, configured to send a handover request message to at least one second network device according to the measurement result, where the handover request message is used to request to handover the terminal to the at least one second network device;

a confirmation message receiving module, configured to receive a handover confirmation message sent by a target second network device in the at least one second network device, where the handover confirmation message is used to confirm that the terminal is handed over to the target second network device;

and the appointed condition confirmation module is used for not sending a switching command to the terminal under the condition that the target second network equipment meets the appointed condition.

In a further aspect, an embodiment of the present application provides a network device, where the network device includes a processor and a memory, where the memory stores a computer program, and the computer program is used for being executed by the processor to implement the handover control method on the first network device side and/or implement the handover control method on the second network device side.

In a further aspect, an embodiment of the present application provides a terminal, where the terminal includes a processor and a memory, where the memory stores a computer program, and the computer program is used to be executed by the processor, so as to implement the foregoing method for controlling handover at a terminal side.

In another aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is used for being executed by a processor to implement the handover control method on the first network device side and/or implement the handover control method on the second network device side.

In another aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is used for being executed by a processor to implement the above-mentioned handover control method on the terminal side.

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

the method comprises the steps that a first signal sent by a terminal is measured through a network side, and a switching decision is made based on a measurement result of the first signal, so that for a scene with high transmission delay or high mobility between the terminal and network equipment, on one hand, the problem that the network side cannot acquire the measurement result or acquires a measurement result which is invalid does not occur, the switching reliability is ensured, the terminal can be smoothly switched from one network equipment to another network equipment, the network side is ensured to always serve the network equipment of the terminal, and the data transmission reliability of the terminal is further ensured; on the other hand, the first signal sent by the terminal is measured through the network side, so that the step of reporting the measurement result by the terminal is omitted, the switching time delay is reduced, and the signaling overhead of an air interface is also reduced.

Drawings

FIG. 1 is a schematic diagram of a network architecture provided by one embodiment of the present application;

FIG. 2 is a schematic diagram of a network architecture provided by another embodiment of the present application;

FIG. 3 is a schematic diagram of a network architecture provided by another embodiment of the present application;

fig. 4 is a flowchart of a handover control method according to an embodiment of the present application;

fig. 5 is a flowchart of a handover control method according to another embodiment of the present application;

fig. 6 is a flowchart of a handover control method according to another embodiment of the present application;

fig. 7 is a flowchart of a handover control method according to another embodiment of the present application;

fig. 8 is a flowchart of a handover control method according to another embodiment of the present application;

fig. 9 is a block diagram of a handover control apparatus according to an embodiment of the present application;

fig. 10 is a block diagram of a handover control apparatus according to another embodiment of the present application;

fig. 11 is a block diagram of a handover control apparatus according to another embodiment of the present application;

fig. 12 is a block diagram of a switching control apparatus according to another embodiment of the present application;

fig. 13 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not constitute a limitation to the technical solution provided in the embodiment of the present application, and it can be known by a person skilled in the art that the technical solution provided in the embodiment of the present application is also applicable to similar technical problems along with the evolution of the network architecture and the appearance of a new service scenario.

Referring to fig. 1, a schematic diagram of a network architecture according to an embodiment of the present application is shown. The network architecture may include: network device 10 and terminal 20.

The network device 10 is a device for providing a wireless communication service to the terminal 20. The network device 10 and the terminal 20 may establish a connection over the air interface, so that communication, including signaling and data interaction, is performed through the connection. The number of the network devices 10 may be plural, and two adjacent network devices 10 may communicate with each other in a wired or wireless manner. The terminal 20 may switch between different network devices 10, i.e. establish a connection with different network devices 10.

In one example, as shown in fig. 2, taking an NTN network as an example, the network device 10 in the NTN network may be a satellite 11. A satellite 11 may cover a range of terrestrial regions to provide wireless communication services to terminals 20 in the terrestrial regions. In addition, the satellite 11 can orbit around the earth, and by arranging a plurality of satellites 11, communication coverage of different areas on the surface of the earth can be realized.

Satellite communications have many unique advantages over terrestrial cellular communication networks. First, satellite communication is not limited by user regions, for example, general terrestrial communication cannot cover regions where communication equipment cannot be set up, such as the sea, mountains, desert, and the like, or communication coverage is not performed due to sparse population, and for satellite communication, since one satellite can cover a large ground and the satellite can orbit around the earth, theoretically every corner on the earth can be covered by satellite communication. Second, satellite communication has great social value. Satellite communication can be covered in remote mountainous areas, poor and laggard countries or areas with lower cost, so that people in the areas can enjoy advanced voice communication and mobile internet technology, the digital gap between the areas is favorably reduced and developed, and the development of the areas is promoted. Thirdly, the satellite communication distance is long, and the cost of communication is not obviously increased when the communication distance is increased; and finally, the satellite communication has high stability and is not limited by natural disasters.

Communication satellites are classified into LEO (Low-Earth Orbit) satellites, MEO (Medium-Earth Orbit) satellites, GEO (Geostationary Orbit) satellites, HEO (High elliptic Orbit) satellites, and the like according to the difference in orbital altitude. The main studies at the present stage are LEO and GEO.

1、LEO

The height range of the low-orbit satellite is 500 km-1500 km, and the corresponding orbit period is about 1.5 hours-2 hours. The signal propagation delay for inter-user single-hop communications is typically less than 20 ms. Maximum satellite visibility time 20 minutes. The signal propagation distance is short, the link loss is less, and the requirement on the transmitting power of the user terminal is not high.

2、GEO

A geosynchronous orbit satellite, with an orbital altitude of 35786km, has a period of 24 hours of rotation around the earth. The signal propagation delay for inter-user single-hop communications is typically 250 ms.

In order to ensure the coverage of the satellite and improve the system capacity of the whole satellite communication system, the satellite adopts multiple beams to cover the ground, and one satellite can form dozens of or even hundreds of beams to cover the ground; one satellite beam may cover a ground area several tens to hundreds of kilometers in diameter.

In another example, as shown in fig. 3, taking a cellular communication network as an example, the network device 10 in the cellular communication network may be a base station 12. The base station 12 is a device deployed in an access network to provide wireless communication functions for the terminal 20. The base stations 12 may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different Radio access technologies, names of devices having a base station function may be different, for example, in a 5G NR (New Radio, New air interface) system, called a nodeb or a gNB. The name "base station" may change as communication technology evolves. For convenience of description, in the embodiment of the present application, the above-mentioned apparatuses providing the terminal 20 with the wireless communication function are collectively referred to as a base station.

In addition, the terminal 20 involved in the embodiment of the present application may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, and various forms of User Equipment (UE), Mobile Stations (MS), terminal devices (terminal device), and so on. For convenience of description, in the embodiments of the present application, the above-mentioned devices are collectively referred to as a terminal.

In addition, in the embodiments of the present application, the terms "network" and "system" are generally used in a mixed manner, but those skilled in the art will understand the meaning thereof.

The technical solution described in the embodiment of the present application may be applied to an NTN system, and may also be applied to a cellular network system.

Taking the NTN system as an example, compared with a cellular communication system, the signal propagation delay between a terminal and a satellite in the NTN system is greatly increased, and there is a problem that the satellite moves quickly, and if the existing handover mechanism based on downlink reference signal measurement reporting is directly used in the NTN system, there are problems in the following aspects:

1. due to the excessively long transmission delay and the rapid movement of the satellite, frequent switching processes need to be executed between the terminal and the network, which causes a large amount of switching signaling overhead and increases the power consumption and workload of the terminal. For example, when a terminal is stationary on earth, the terminal moves at an extremely high speed with respect to the satellite even though the terminal is stationary with respect to the ground, since the satellite moves at an extremely high speed with respect to the earth, which means that the terminal has an extremely high mobility with respect to the satellite (with the satellite as a reference).

2. If the existing handover mechanism based on the downlink reference signal measurement report is used, due to the fact that the transmission delay is too long and the satellite moves quickly (i.e., the terminal moves quickly relative to the satellite), it is considered that the communication distance between the terminal and the satellite is long, and thus, the problem of too long transmission delay is also superimposed on the basis of frequent handover, and the phenomenon of large delay existing in the frequent handover and the handover process can easily cause the handover command to the terminal to fail or the terminal has moved out of the cell range, resulting in handover failure or network outage of the terminal, which is a very serious problem.

In summary, because the transmission delay of the wireless signal between the terminal and the satellite is large, and the satellite has a characteristic of fast movement relative to the ground, if it is determined whether to perform handover again based on the downlink reference signal measurement report, the effectiveness of the satellite on handover determination will be reduced, and the handover performance will be affected.

In addition, even in a cellular network system, when the transmission delay between the terminal and the base station is long or the relative movement speed between the terminal and the base station is high, such as when the terminal is in a fast moving vehicle or aircraft, if the handover is determined again based on the downlink reference signal measurement report, the effectiveness of the base station on handover determination is also reduced, which affects the handover performance.

Based on this, the embodiment of the application provides a switching control method, a switching control device, switching control equipment and a storage medium. In the technical solution provided in the embodiment of the present application, uplink mobility is used to replace downlink mobility, that is, a terminal sends an uplink reference signal to a network device (such as a satellite or a base station), and a network side comprehensively determines and decides how to service the terminal according to the received uplink reference signal, for example, whether to replace the network device serving the terminal. Therefore, on one hand, the reliability of switching and data transmission is ensured, and on the other hand, the switching time delay and the signaling overhead of an air interface are also reduced.

Specifically, for the scenario with high transmission delay or high mobility introduced above, when the transmission delay between the terminal and the network device is large, or the relative movement speed between the terminal and the network device is large, if a switching mechanism based on the downlink reference signal measurement report is adopted, because the transmission delay between the terminal and the source network device is large or the relative movement speed is large, the terminal may fail to report its measurement result of the downlink reference signal to the source network device successfully, or the measurement result of the downlink reference signal reported by the terminal is failed when received by the source network device, so that the terminal may fail to perform switching successfully, which affects the normal communication of the terminal. By adopting the technical scheme provided by the embodiment of the application, the uplink reference signal sent by the terminal is measured through the network side, and the switching decision is carried out based on the measurement result, so that the problem that the network side cannot acquire the measurement result of the uplink reference signal and the problem that the network side acquires the measurement result which is invalid can not occur, the switching reliability is ensured, the terminal can be smoothly switched from one network device to another network device, the network device which serves the terminal at the network side is ensured, and the data transmission reliability of the terminal is further ensured.

On the other hand, based on a handover mechanism for downlink reference signal measurement reporting, a network side is required to send a downlink reference signal, a terminal measures the downlink reference signal, and then reports the measurement result to the network side, which may cause a handover delay to be large in a high transmission delay scenario. By adopting the technical scheme provided by the embodiment of the application, the uplink reference signal sent by the terminal is measured through the network side, so that the step of reporting the measurement result by the terminal is omitted, the switching time delay is reduced, and the signaling overhead of an air interface is also reduced.

In addition, for a terminal, in a high-mobility scenario (for example, in an NTN network), if a handover mechanism based on downlink reference signal measurement reporting is adopted, since a frequently-handed scenario exists between the terminal and a network device, the frequently-handed scenario requires the terminal to frequently perform measurement and reporting, which not only requires a high requirement for an air interface signaling, but also causes an increase in terminal power consumption and a problem of power consumption. By adopting the technical scheme provided by the embodiment of the application, the uplink reference signal sent by the terminal is measured through the network side, so that the terminal does not need to carry out frequent measurement and report, and the power consumption and the electric quantity of the terminal are saved.

The technical solution of the present application will be described below with reference to several exemplary embodiments.

Referring to fig. 4, a flowchart of a handover control method provided in an embodiment of the present application is shown, where the method can be applied to the network architectures shown in fig. 1 to fig. 3, and the method can include the following steps:

step 401, a first network device sends first configuration information to a terminal.

The first network device refers to a network device currently establishing a connection with the terminal, and may also be referred to as a source network device.

The first configuration information is used to indicate a transmission configuration of the first signal, i.e., to inform the terminal how to transmit the first signal. For example, the first configuration information may be used to indicate a time-frequency location for transmitting the first signal to the terminal, may also be used to indicate to the terminal to transmit the first signal periodically or aperiodically, and the like, which is not limited in this embodiment of the present application.

Optionally, the first signal belongs to an uplink reference signal. For example, the first Signal may be an SRS (Sounding Reference Signal).

Optionally, the first signal is a terminal-specific (specific) signal, for example, the first network device may send the first configuration information to the terminal through a dedicated signaling, for example, the dedicated signaling may be a dedicated RRC (Radio Resource Control) message.

Optionally, the first network device sends measurement configuration information to the terminal, where the measurement configuration information carries the first configuration information. The measurement configuration information is information for providing a measurement configuration to the terminal, such as an uplink measurement configuration and/or a downlink measurement configuration, which is not limited in this embodiment of the present application.

Optionally, the first network device may send the first configuration information to the terminal when the terminal initially accesses; alternatively, the first network device may send the first configuration information to the terminal when a certain condition (e.g., poor signal quality between the first network device and the terminal) is satisfied.

Step 402, the terminal sends a first signal according to the first configuration information.

And after receiving the first configuration information, the terminal sends a first signal according to the first configuration information. For example, the terminal occupies the time-frequency resource configured by the first configuration information to transmit the first signal. Optionally, the terminal may also determine whether to transmit the first signal periodically or aperiodically according to the first configuration information, for example, if a certain condition is satisfied.

Optionally, the first network device may further send a first sending activation instruction to the terminal, where the first sending activation instruction is used to trigger the terminal to send the first signal. For example, the terminal starts to transmit the first signal after receiving the first transmission activation instruction transmitted by the first network device. Alternatively, the terminal may transmit the first signal according to the first configuration information.

In step 403, the first network device sends measurement indication information to a second network devices, where a is a positive integer.

The number of the second network devices may be one or more. The second network device is a network device other than the first network device, i.e. the second network device and the first network device are not the same network device. Optionally, the second network device is a network device adjacent to the first network device, where the adjacent network device may refer to a network device whose distance is less than a certain threshold, may also refer to a network device whose signal quality is greater than a certain threshold, and may also refer to a network device adjacent to a coverage area, which is not limited in this embodiment of the present application. In an example, the first network device may determine the a second network devices from a list of network devices around the first network device according to related information, where the related information may include, but is not limited to, at least one of the following: the first network device's own ephemeris, the ephemeris of each network device, the movement trajectory of the terminal, the location information of each network device, etc. The second network device may also be referred to as a candidate target network device, that is, if the terminal needs to perform handover, the target network device to which the terminal is handed over may be selected from the a second network devices.

The measurement indication information is used for indicating the a second network devices to measure the first signal sent by the terminal.

Optionally, the measurement indication information includes: first configuration information; and/or a first measurement activation instruction, which is used for triggering the a second network devices to activate measurement of the first signal. After the second network device obtains the first configuration information, it can obtain the time-frequency resource occupied by the first signal, and then detect the first signal on the corresponding time-frequency resource, thereby improving the detection efficiency.

Optionally, the measurement indication information comprises at least one of: a measurement start time of the first signal, a measurement end time of the first signal, a measurement duration of the first signal, and a measurement period of the first signal. For example, when the measurement start time of the first signal arrives, the second network device starts detecting the first signal, and measures the reception quality of the first signal when detecting the first signal. Alternatively, the second network device may start detecting the first signal after receiving the measurement indication information.

In step 404, the second network device measures the first signal sent by the terminal according to the measurement indication information to obtain a first measurement result, where the first measurement result is used to decide whether to switch the network device connected to the terminal.

The first measurement result refers to a result obtained by the second network device measuring the first signal. The first measurement result obtained by different second network devices may be the same or different. The first measurement result may be a measurement value obtained by the second network device measuring the first Signal, such as RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio), SNR (Signal to Noise Ratio), RSSI (Received Signal Strength Indication), and the like. The first measurement result may also be a result value for characterizing the quality of the wireless signal obtained based on the above measurement values, and if the quality of the wireless signal can be divided into two types, i.e., poor and excellent, the result value may be represented by 1 bit, i.e., 0 represents poor and 1 represents excellent. Of course, the types of wireless signal quality can be divided into more than two types, and the embodiment of the present application does not limit this.

After the second network device measures the first signal sent by the terminal to obtain the first measurement result, the first measurement result may be sent to the first network device, so that the first network device synthesizes the first measurement results sent by each second network device to make a decision on whether the terminal is switched. Or, the second network device may not send the first measurement result to the first network device, and the second network device makes a decision as to whether the terminal is switched. For both cases, reference will be made below to different embodiments.

Since the first measurement result reflects the quality of the wireless signal between the terminal and the second network device, when the quality of the wireless signal between the terminal and a certain second network device is better, for example, greater than a certain threshold value or better than the quality of the wireless signal between the terminal and the first network device, the terminal can be switched from the first network device to the second network device, and the second network device provides service for the terminal, thereby ensuring the reliability of data transmission of the terminal.

To sum up, in the technical solution provided in this embodiment of the application, a first signal sent by a terminal is measured by a network side, and a handover decision is made based on a measurement result of the first signal, and for a scenario with high transmission delay or high mobility between the terminal and a network device, on one hand, a problem that the network side cannot obtain the measurement result or obtains a measurement result that has failed does not occur, so that reliability of handover is ensured, the terminal can be smoothly handed over from one network device to another network device, a network device serving the terminal at the network side is ensured all the time, and reliability of data transmission of the terminal is also ensured; on the other hand, the first signal sent by the terminal is measured through the network side, so that the step of reporting the measurement result by the terminal is omitted, the switching time delay is reduced, and the signaling overhead of an air interface is also reduced.

As described in the above embodiments, the decision as to whether the terminal is handed over may be made by the first network device (i.e., the source network device) or may be made by the second network device (i.e., the candidate target network device). The two cases will be described below with reference to the two embodiments of fig. 5 and 6. In the embodiment shown in fig. 5, mainly describing the first case, the first network device (i.e. the source network device) makes a decision whether the terminal is handed over; in the embodiment shown in fig. 6, mainly describing the second case, the second network device (i.e. the candidate target network device) makes a decision as to whether the terminal is handed over.

Referring to fig. 5, a flowchart of a handover control method according to another embodiment of the present application is shown, where the method can be applied to the network architectures shown in fig. 1 to fig. 3, and the method can include the following steps:

step 501, a first network device sends first configuration information to a terminal.

Step 502, the terminal sends a first signal according to the first configuration information.

Step 503, the first network device sends measurement indication information to a second network devices, where a is a positive integer.

Step 503 may be executed simultaneously with step 501, or may be executed after step 501, which is not limited in this embodiment of the application.

In addition, the steps 501-503 are the same as or similar to the steps 401-403 in the embodiment of fig. 4, and reference may be specifically made to the description in the embodiment of fig. 4, which is not repeated herein.

Step 504, the first network device measures the first signal to obtain a second measurement result.

The second measurement result is a result obtained by the first network device measuring the first signal. The second measurement result may be a measurement value, such as RSRP, RSRQ, SINR, SNR, RSSI, etc., obtained by the first network device measuring the first signal. The second measurement result may also be a result value for characterizing the quality of the wireless signal obtained based on the above measurement values, for example, if the quality of the wireless signal can be divided into 3 types, i.e., poor, normal and excellent, the result value may be represented by 2 bits, i.e., 00 represents poor, 01 represents normal and 10 represents excellent.

And step 505, the second network device measures the first signal according to the measurement indication information to obtain a first measurement result.

Step 505 is the same as or similar to step 404 in the embodiment of fig. 4, and reference may be specifically made to the description in the embodiment of fig. 4, which is not repeated herein.

Step 506, the second network device sends the first measurement result to the first network device.

The second network device may send the first measurement result to the first network device, so that the first network device synthesizes the first measurement results sent by the second network devices to make a decision on whether to switch the terminal.

Correspondingly, the first network device receives first measurement results sent by b second network devices in the a second network devices, where b is a positive integer less than or equal to a. That is, after sending the measurement indication information to the a second network devices, the first network device may receive the first measurement result fed back by all of the a second network devices, or may receive the first measurement result fed back by some of the a second network devices.

Step 507, when the second measurement result meets the first condition and the first measurement result sent by the target second network device meets the second condition, the first network device sends a handover request message to the target second network device.

The handover request message is used to request handover of the terminal to the target second network device. The target second network device may be a second network device of the b second network devices.

It should be noted that, the target second network device is selected from the b second network devices by the first network device, for example, the first network device selects to send the handover request message to the second network device whose first measurement result satisfies the second condition. In addition, the number of the target second network devices may be one or more, that is, the first network device may send the handover request message to only one target second network device, or may send the handover request message to a plurality of target second network devices.

The first condition and the second condition refer to a preset condition for deciding to perform handover, a handover performing condition determined by negotiation between network devices, or a handover performing condition determined by at least some of the related network devices (e.g., source network devices). When the second measurement result meets the first condition, the wireless signal quality between the terminal and the first network equipment is poor, and the terminal can be switched to another network equipment with better quality. When the first measurement result sent by a certain second network device meets the second condition, it indicates that the quality of the wireless signal between the terminal and the second network device is better, and the terminal can be switched to the second network device to provide better service for the terminal.

Optionally, the first condition includes, but is not limited to, any one of:

(1) the second measurement result is less than or equal to the first threshold value;

(2) the second measurement result is less than or equal to the first threshold value for N times continuously;

(3) the duration of the second measurement result which is less than or equal to the first threshold value is greater than or equal to the first duration; and the number of the first and second groups,

(4) the duration of the second measurement result which is less than or equal to the first threshold value for N consecutive times is greater than or equal to the first duration;

wherein N is a positive integer. In addition, the first threshold refers to a threshold related to the measurement result, and the first duration refers to a threshold related to the duration.

The first network device may perform at least one measurement on a first signal sent by the terminal, so as to obtain at least one measurement result. The first condition may be preset according to a requirement, and the embodiment of the present application does not limit this.

Optionally, the second condition includes, but is not limited to, any one of:

(1) the first measurement result is greater than or equal to a second threshold value;

(2) the first measurement result is greater than or equal to a second threshold value for M consecutive times;

(3) the duration of the first measurement result which is greater than or equal to the second threshold value is greater than or equal to the second duration; and the number of the first and second groups,

(4) the duration of the first measurement result which is greater than or equal to the second threshold value for M consecutive times is greater than or equal to the second duration;

wherein M is a positive integer. In addition, the second threshold value refers to a threshold value related to the measurement result, and the second duration refers to a threshold value related to the duration.

Each second network device may also perform at least one measurement on the first signal sent by the terminal, so as to obtain at least one measurement result. The second condition may be preset according to a requirement, and is not limited in the embodiment of the present application.

It should be noted that, in some possible embodiments, the first network device may also make a decision whether to handover the terminal according to only the first measurement result, that is, the second measurement result of the first network device may not be considered when making the handover decision. For example, when a first measurement result sent by the target second network device satisfies a second condition, the first network device sends a handover request message to the target second network device. In this case, the first network device may pay more attention to the continuity of the handover, and ensure that the terminal may handover to a suitable cell to the greatest extent, or may not perform measurement on the first signal, or reduce the measurement duration of the first signal by the first network device as much as possible, thereby reducing the processing overhead of the first network device.

In step 508, the first network device receives the handover confirm message sent by the target second network device.

The target second network device determines whether to allow the terminal to switch to the target second network device after receiving the handover request message sent by the first network device, and if the terminal is allowed to switch to the target second network device, the target second network device may send a handover confirmation message to the first network device, where the handover confirmation message is used to indicate that the terminal is confirmed to be switched to the target second network device. The handover confirm message may also be referred to as a handover request reply message.

After receiving a handover confirmation message sent by a certain target second network device, the first network device may know that the target second network device allows the terminal to perform handover, and at this time, the first network device may determine to handover the terminal from the first network device to the target second network device.

In addition, considering that the first network device may receive the handover confirmation messages sent by the target second network devices, that is, there are multiple target second network devices that allow the terminal to perform handover, the first network device may select one target second network device determined to be the target second network device to which the terminal is handed over from the multiple target second network devices that send the handover confirmation messages. For example, the first network device may select a target second network device corresponding to the first received handover confirmation message as a target second network device to which the terminal is handed over; for another example, the first network device may select a target second network device with the best wireless signal quality with the terminal, as the target second network device to which the terminal is handed over, or may also select the target second network device to which the terminal is handed over in other manners, which is not limited in this embodiment of the application.

Optionally, after the first network device selects one target second network device from the multiple target second network devices that send the handover confirmation message as the target second network device to which the terminal is handed over, the first network device may send a handover cancel instruction to the other unselected target second network devices, where the handover cancel instruction is used to instruct to cancel the handover of the terminal to the other unselected target second network devices.

In step 509, after determining to switch the terminal to the target second network device, the first network device sends a switch command to the terminal.

The handover command is used to instruct the terminal to handover from the first network device to the target second network device. After receiving the handover command, the terminal may execute a handover procedure for handover from the first network device to the target second network device. Optionally, after receiving the handover command, the terminal may initiate a connection establishment request (e.g., a random access request) to the target second network device, requesting to establish a connection with the target second network device. After the terminal successfully establishes the connection with the target second network device, the terminal can perform data transmission with the target second network device through the connection.

Optionally, the handover command is a HO command message.

Optionally, the handover command includes, but is not limited to, at least one of the following information: a resource used for a RACH (Random Access Channel), a C-RNTI (Cell-Radio Network Temporary Identifier), a security algorithm of the target second Network device, a system message of the target second Network device, and the like.

It should be noted that the target second network device in this step refers to a target second network device selected by the first network device in the manner described in step 508.

In addition, the timing when the first network device sends the measurement indication information may include the following two cases:

1. the configuration is sent. That is, as long as the first network device configures the terminal to transmit the first signal, for example, the first configuration information is transmitted to the terminal, the first network device transmits the measurement indication information to the at least one second network device.

2. And sending the data after the condition is met. That is, the first network device sends the measurement indication information to the at least one second network device only when a certain condition is satisfied. For example, the first network device measures the first signal to obtain a second measurement result, and when the second measurement result satisfies a fourth condition, the first network device sends measurement indication information to a second network devices.

Optionally, the fourth condition includes, but is not limited to, any of:

(1) the second measurement result is less than or equal to a fourth threshold value;

(2) the second measurement result is less than or equal to a fourth threshold value for P times continuously;

(3) the duration of the second measurement result which is less than or equal to the fourth threshold value is greater than or equal to the fourth duration; and the number of the first and second groups,

(4) the duration of the second measurement result which is less than or equal to the fourth threshold value for P consecutive times is greater than or equal to the fourth duration;

wherein P is a positive integer. In addition, the fourth threshold value refers to a threshold value related to the measurement result, and the fourth duration refers to a threshold value related to the duration.

That is, when the first network device detects that the wireless signal quality between the first network device and the terminal is poor, the first network device sends measurement indication information to the second network device, and seeks to switch the terminal to the network device with better wireless signal quality.

In an exemplary embodiment, the second network device may further send the first measurement result to the first network device after receiving the measurement feedback instruction sent by the first network device. For example, the first network device measures the first signal to obtain a second measurement result, and when the second measurement result satisfies a third condition, the first network device sends a measurement feedback instruction to the second network device, where the measurement feedback instruction is used to instruct the a second network devices to send the first measurement result to the first network device. Optionally, the third condition includes, but is not limited to, any one of:

(1) the second measurement result is less than or equal to a third threshold value;

(2) the second measurement result is less than or equal to a third threshold value for Q consecutive times;

(3) the duration of the second measurement result which is less than or equal to the third threshold value is greater than or equal to the third duration; and the number of the first and second groups,

(4) the duration of the second measurement result, which is less than or equal to the third threshold value for Q consecutive times, is greater than or equal to the third duration;

wherein Q is a positive integer. In addition, the third threshold refers to a threshold related to the measurement result, and the third duration refers to a threshold related to the duration.

That is, when the first network device detects that the quality of the wireless signal between the first network device and the terminal is poor, the first network device requests the second network device to obtain the first measurement result, and seeks to switch the terminal to the network device with better wireless signal quality.

In an exemplary embodiment, the sending, by the second network device, the first measurement result to the first network device may include the following situations:

1. and the second network equipment sends the first measurement result to the first network equipment every time the second network equipment acquires the first measurement result.

That is, the second network device sends the first measurement result obtained last time to the first network device in real time.

2. The second network device processes (e.g., averages) the first measurement result obtained within a period of time to obtain a processed first measurement result, and then sends the processed first measurement result to the first network device.

3. And the second network equipment sends the first measurement result to the first network equipment when the first measurement result meets a fifth condition.

Optionally, the fifth condition includes, but is not limited to, any one of:

(1) the first measurement result is greater than or equal to a fifth threshold value;

(2) the first measurement result is greater than or equal to a fifth threshold value for R times in succession;

(3) the duration of the first measurement result which is greater than or equal to the fifth threshold value is greater than or equal to the fifth duration; and the number of the first and second groups,

(4) the duration of the first measurement result, which is greater than or equal to the fifth threshold value for R consecutive times, is greater than or equal to the fifth duration;

wherein R is a positive integer. In addition, the fifth threshold refers to a threshold related to the measurement result, and the fifth time duration refers to a threshold related to the time duration.

That is, when the second network device detects that the quality of the wireless signal between the second network device and the terminal is better, the second network device actively transmits the first measurement result to the first network device, and when the second network device detects that the quality of the wireless signal between the second network device and the terminal is not excellent, the second network device may not transmit the first measurement result to the first network device, thereby saving signaling overhead.

4. And after receiving the measurement feedback instruction sent by the first network equipment, the second network equipment sends the first measurement result to the first network equipment.

5. And after receiving the measurement feedback instruction sent by the first network device, and when the first measurement result meets a sixth condition, the second network device sends the first measurement result to the first network device.

Optionally, the sixth condition includes, but is not limited to, any one of:

(1) the first measurement result is greater than or equal to a sixth threshold value;

(2) the first measurement result is greater than or equal to a sixth threshold value for U times continuously;

(3) the duration of the first measurement result which is greater than or equal to the sixth threshold value is greater than or equal to the sixth duration; and the number of the first and second groups,

(4) the duration of the first measurement result which is greater than or equal to the sixth threshold value for U times is greater than or equal to six times;

wherein U is a positive integer. In addition, the sixth threshold refers to a threshold related to the measurement result, and the sixth duration refers to a threshold related to the duration.

Optionally, after receiving the measurement feedback instruction, the second network device may send the first measurement result obtained last time to the first network device, may also send the first measurement result obtained within a period of time to the first network device, or send the processed first measurement result (obtained after processing the first measurement result obtained within a period of time) to the first network device. For example, the period of time may be all or part of the period of time from when the second network device starts measuring the first signal to when the measurement feedback instruction is received.

In summary, in this embodiment, it is implemented that the first network device (i.e., the source network device) makes a decision on whether the terminal is switched.

Referring to fig. 6, a flowchart of a handover control method according to another embodiment of the present application is shown, where the method can be applied to the network architectures shown in fig. 1 to fig. 3, and the method can include the following steps:

step 601, the first network device sends first configuration information to the terminal.

Step 602, the terminal sends a first signal according to the first configuration information.

Step 603, the first network device sends measurement indication information to a second network devices, where a is a positive integer.

Step 603 may be executed simultaneously with step 601, or may be executed after step 601, which is not limited in this embodiment of the application.

In addition, the steps 601-603 are the same as or similar to the steps 401-403 in the embodiment of fig. 4, and reference may be specifically made to the description in the embodiment of fig. 4, which is not repeated herein.

Step 604, the first network device measures the first signal to obtain a second measurement result.

The second measurement result is a result obtained by the first network device measuring the first signal. The second measurement result may be a measurement value, such as RSRP, RSRQ, SINR, SNR, RSSI, etc., obtained by the first network device measuring the first signal. The second measurement result may also be a result value for characterizing the quality of the wireless signal based on the above measurement values, for example, if the quality of the wireless signal can be divided into 4 types, i.e., poor, normal, good, and excellent, the result value can be represented by 2 bits, i.e., 00 indicates poor, 01 indicates normal, 10 indicates good, and 11 indicates excellent.

Step 605, the second network device measures the first signal according to the measurement indication information to obtain a first measurement result.

The step 605 is the same as or similar to the step 404 in the embodiment of fig. 4, and reference may be specifically made to the description in the embodiment of fig. 4, which is not repeated herein.

Step 606, the first network device sends the second measurement result to the a second network devices.

And the first network equipment sends the second measurement result to the second network equipment, so that the second network equipment integrates the received second measurement result and the first measurement result obtained by the second network equipment to make a decision on whether the terminal is switched.

Optionally, when the first network device receives a measurement result acquisition request sent by the second network device, the first network device sends the second measurement result to the second network device. And when the first measurement result meets the seventh condition, the second network equipment sends a measurement result acquisition request to the first network equipment, wherein the measurement result acquisition request is used for requesting to acquire a second measurement result.

Optionally, the seventh condition includes, but is not limited to, any one of:

(1) the first measurement result is greater than or equal to a seventh threshold value;

(2) the first measurement result is greater than or equal to a seventh threshold value for S times;

(3) the duration of the first measurement result which is greater than or equal to the seventh threshold value is greater than or equal to the seventh duration; and the number of the first and second groups,

(4) the duration of the first measurement result which is greater than or equal to the seventh threshold value for S consecutive times is greater than or equal to the seventh duration;

wherein S is a positive integer. In addition, the seventh threshold refers to a threshold related to the measurement result, and the seventh duration refers to a threshold related to the duration.

That is, when the second network device detects that the quality of the wireless signal between the second network device and the terminal is better, the second network device requests the first network device to obtain the second measurement result, so as to decide whether the terminal needs to be switched or not, and provide better service for the terminal. When the second network device detects that the quality of the wireless signal between the second network device and the terminal is not excellent, the second network device may not request the first network device to obtain the second measurement result, and accordingly the first network device does not need to send the second measurement result to the second network device, thereby saving signaling overhead.

Optionally, when the second measurement result satisfies an eighth condition, the first network device sends the second measurement result to the second network device.

Optionally, the eighth condition includes, but is not limited to, any one of:

(1) the second measurement result is less than or equal to an eighth threshold value;

(2) the second measurement result is less than or equal to an eighth threshold value for T times continuously;

(3) the duration of the second measurement result which is less than or equal to the eighth threshold value is greater than or equal to the eighth duration; and the number of the first and second groups,

(4) the duration of the second measurement result which is less than or equal to the eighth threshold value for T consecutive times is greater than or equal to the eighth time;

wherein T is a positive integer. In addition, the eighth threshold refers to a threshold related to the measurement result, and the eighth time duration refers to a threshold related to the time duration.

That is, when the first network device detects that the quality of the wireless signal between the first network device and the terminal is poor, the first network device actively sends the second measurement result to the second network device, so as to trigger the second network device to make a handover decision, and seek to handover the terminal to the network device with better wireless signal quality.

Optionally, the first network device sends the second measurement result to the second network device at or after the second network device starts performing the measurement on the first signal. Of course, in some other embodiments, the first network device may also send the second measurement result to the second network device each time the second measurement result is obtained, or each time interval is set. Optionally, the second measurement result sent by the first network device to the second network device may be a second measurement result obtained last time, or a second measurement result obtained within a period of time, which is not limited in this embodiment of the present application.

Step 607, when the second measurement result meets the first condition and the first measurement result meets the second condition, the second network device sends the handover indication information to the first network device.

The switching indication information is used for indicating the switching of the terminal to the second network equipment. For description of the first condition and the second condition, reference may be made to the embodiment in fig. 5, which is not described again in this embodiment.

It should be noted that, in some possible embodiments, the second network device may also make a decision whether to handover the terminal according to the first measurement result only, that is, the second measurement result of the first network device may not be considered when making a handover decision. For example, when the first measurement result satisfies the second condition, the second network device sends the handover indication information to the first network device. In this case, the first network device may or may not perform measurement on the first signal, and does not need to transmit the second measurement result to the second network device, thereby reducing the processing overhead of the first network device.

Step 608, after determining to handover the terminal to the target second network device, the first network device sends a handover command to the terminal.

Optionally, the handover command is a HO command message.

Optionally, the handover command includes, but is not limited to, at least one of the following information: resources for RACH, C-RNTI, security algorithm of the target second network device, system message of the target second network device, etc.

After receiving the handover indication information sent by a certain second network device, the first network device may learn that the second network device allows the terminal to perform handover, and at this time, the first network device may determine to handover the terminal from the first network device to the second network device.

In addition, considering that the first network device may receive the handover indication information sent by the plurality of second network devices, that is, there are a plurality of second network devices allowing the terminal to perform handover, the first network device may select one second network device as the target second network device from the plurality of second network devices that send the handover indication information. For example, the first network device may select a second network device corresponding to the first received handover indication information as a target second network device; for another example, the first network device may select a second network device with the best wireless signal quality with the terminal as the target second network device, or may also select the target second network device in other manners, which is not limited in this embodiment of the present application.

Optionally, after the first network device selects one second network device from the plurality of second network devices that send the handover indication information as the target second network device, the first network device may send a handover cancel instruction to the other second network devices, where the handover cancel instruction is used to instruct to cancel the handover of the terminal to the other second network devices. The other second network device is a second network device other than the selected target second network device among the plurality of second network devices that send the handover indication information.

In summary, in this embodiment, the decision of the second network device (i.e., the candidate target network device) on whether the terminal is switched is implemented, and compared with the scheme of the decision of the first network device (i.e., the source network device) on whether the terminal is switched, the scheme provided in this embodiment is beneficial to saving the interaction waiting time of the first measurement result, and further reducing the switching delay.

In the above-described embodiments, after the first network device determines to handover the terminal to the target second network device, the first network device may send a handover command (e.g., HO command message) to the terminal, explicitly indicating to the terminal to handover from the first network device to the target second network device.

In an exemplary embodiment, after determining to switch the terminal to the target second network device, the first network device may not send a handover command (e.g., HO command message) to the terminal, and the network side switches the first network device serving the terminal to the target second network device through interaction between the first network device and the target second network device, thereby implementing the handover that is not perceived by the terminal.

Optionally, after receiving a handover confirmation message sent by the target second network device, the first network device is configured to instruct to confirm that the terminal is to be handed over to the target second network device, and in a case that it is confirmed that the target second network device satisfies the specified condition, the first network device does not send a handover command to the terminal, and completes handing over the terminal from the first network device to the target second network device. That is, when the terminal is switched from the cell of the first network device to the cell of the target second network device, the terminal may directly perform data transmission with the target second network device without adjusting the configuration or initiating a connection establishment request to the target second network device.

Optionally, the specified conditions include, but are not limited to, at least one of:

1. the cell of the target second network equipment and the cell of the first network equipment belong to the same cell group and meet the first characteristic;

one cell group may include one or more cells, and when the cell of the target second network device and the cell of the first network device belong to the same cell group and satisfy the first characteristic, it indicates that the configurations of the two cells may be the same or similar, and in this case, the terminal may be directly handed over from the cell of the first network device to the cell of the target second network device without informing the terminal (i.e., without sending a handover command to the terminal).

Illustratively, the first feature includes, but is not limited to, at least one of:

(1) the Cell of the target second network device and the Cell of the first network device share the same PCI (Physical Cell Identifier), and the beam (beam) configurations of the Cell of the target second network device and the Cell of the first network device are different;

(2) the cell of the target second network device and the cell of the first network device share the same virtual PCI, and the terminal uses the virtual PCI to perform operations such as scrambling and decoding when communicating with the target second network device and the first network device;

(3) the cell of the target second network device and the cell of the first network device share radio resources; for example, the cell of the target second network device and the cell of the first network device are allocated to use the same radio resource;

(4) a Timing Advance (TA) corresponding to the cell of the target second network device and/or a Timing advance corresponding to the cell of the first network device satisfy a condition. For example, the target second network device and the first network device belong to the same tag (timing advance group), or the TA of the cell of the target second network device is 0, or the TA difference between the terminal and the first network device and/or the target second network device is smaller than a threshold, or the target second network device may acquire the TA of the first network device, or the target second network device may perform TA adjustment based on the TA of the first network device, and so on.

When the cell of the target second network device and the cell of the first network device satisfy the first characteristic, it is described that the configurations of the two cells may be the same or similar, so that it is not necessary to send a handover command of an air interface to the terminal to provide the terminal with the relevant information (such as the security algorithm of the target second network device, the system message of the target second network device, and the like) of the cell of the target second network device, and the terminal does not need to change the relevant configuration to communicate with the target second network device, and the terminal directly follows the configuration when accessing the first network device, thereby implementing the handover without sensing of the terminal. In this case, the terminal is actually handed over from the first network device to the target second network device, but from the terminal's perspective, it is considered to be communicating with the same network device.

2. The switching confirmation message sent by the target second network equipment does not carry resource allocation information, and the resource allocation information is used for indicating the target second network equipment to allocate resources for the terminal;

if the handover confirmation message sent by the target second network device does not carry the resource allocation information, the target second network device may implicitly notify the first network device in this way, and may complete the handover of the terminal from the first network device to the target second network device without sending an air interface handover command to the terminal.

3. And the switching confirmation message sent by the target second network equipment indicates that the resource configuration provided by the target second network equipment for the terminal is the same as the resource configuration provided by the first network equipment for the terminal. That is, the handover confirmation message sent by the target second network device indicates that the resource configuration provided by the target second network device for the terminal is unchanged compared with the resource configuration provided by the first network device for the terminal.

The target second network device may also inform the first network device in this way, and may complete the handover of the terminal from the first network device to the target second network device without sending a handover command of an air interface to the terminal.

Of course, the target second network device may also notify the first network device in other manners, and a handover command does not need to be sent to the terminal, which is not limited in this embodiment of the present application. In addition, the target second network device may detect whether the cell of the target second network device and the cell of the first network device belong to the same cell group and satisfy the first characteristic, and if the target second network device detects that the cell of the target second network device and the cell of the first network device belong to the same cell group and satisfy the first characteristic, the target second network device may notify the first network device in the manner described above when sending the handover confirmation message to the first network device, without sending the handover command to the terminal.

In addition, the terminal may select a beam for transmission with the cell of the target second network device based on a beam failure recovery (beam failure recovery) procedure.

In addition, cells belonging to the same cell group may use the same security key when communicating with the terminal. For example, when the cell of the target second network device and the cell of the first network device belong to the same cell group, the security key used when the target second network device communicates with the terminal may be the same as the security key used when the first network device communicates with the terminal.

With reference to fig. 7, taking the first network device (i.e. the source network device) as an example to decide whether the terminal is handed over, and completing the handover of the terminal from the first network device to the target second network device without sending a handover command, the process may include the following steps:

step 701, a first network device sends first configuration information to a terminal.

Step 702, the terminal sends a first signal according to the first configuration information.

Step 703, the first network device sends measurement indication information to a second network devices, where a is a positive integer.

Step 704, the first network device measures the first signal to obtain a second measurement result.

Step 705, the second network device measures the first signal according to the measurement indication information to obtain a first measurement result.

Step 706, the second network device sends the first measurement result to the first network device.

Step 707, when the second measurement result satisfies the first condition and the first measurement result sent by the target second network device satisfies the second condition, the first network device sends a handover request message to the target second network device. Optionally, the second network device meeting the specified condition is preferentially selected to send the handover request message.

In step 708, the first network device receives the handover confirm message sent by the target second network device.

Step 709, the first network device releases the context information of the terminal when determining to switch the terminal to the target second network device and confirming that the target second network device meets the specified condition. In this case, the first network device does not send a handover command to the terminal, and handover that is not perceived by the terminal is achieved.

And step 710, performing data transmission between the terminal and the target second network device.

Of course, in other examples, for the case that the second network device (i.e. the candidate target network device) makes a decision on whether to handover the terminal, the handover of the terminal from the first network device to the target second network device may also be completed without sending a handover command.

It should be noted that, if the first network device receives the handover acknowledgement messages sent by multiple second network devices, the first network device may preferentially select, as the target second network device, a second network device that belongs to the same cell group as the first network device, or may also select, as the target second network device, a second network device with the best channel quality, or may also select, as the target second network device, a second network device that can support a specific service of the terminal (e.g., a high priority service, a GBR (Guaranteed Bit Rate) service, etc.). And under the condition that the selected target second network equipment meets the specified conditions, the first network equipment does not need to send a switching command to the terminal, and the switching without perception of the terminal is realized.

Optionally, after determining to handover the terminal to the target second network device, the first network device may further send a handover notification to the target second network device, where the handover notification is used to inform the target second network device to provide a service for the terminal, for example, to receive and transmit data related to the terminal. Of course, in other examples, the first network device may not send the handover notification to the target second network device, which is not limited in this embodiment of the present application.

In summary, in this embodiment, the network side does not need to send a handover command to the terminal, so as to implement handover of the serving cell of the terminal, implement handover that is not perceived by the terminal, and contribute to saving signaling overhead.

For the switching scheme based on the downlink reference signal measurement report, the network side can also realize the switching of the service cell of the terminal under the condition of not sending a switching command to the terminal. As shown in fig. 8, the method may include the following steps:

step 801, a terminal sends a measurement result of a downlink reference signal to a first network device.

In this embodiment, the first network device also refers to a network device currently establishing a connection with the terminal, and the first network device may also be referred to as a source network device.

The terminal may measure the downlink reference signal sent by the network side according to the configuration of the network side (e.g., the first network device), so as to obtain a corresponding measurement result. And when the terminal meets the measurement reporting condition, the terminal sends the measurement result to the first network equipment.

The measurement result of the downlink reference signal may be a measurement value obtained by the terminal by measuring the downlink reference signal, such as RSRP, RSRQ, SINR, SNR, RSSI, and the like. The measurement result of the downlink reference signal may also be a result value obtained based on the above measurement values for characterizing the quality of the radio signal, for example, the quality of the radio signal may be divided into two types, i.e., a difference and an excellent, and the result value may be represented by 1 bit, for example, 0 represents a difference and 1 represents an excellent. Of course, the types of wireless signal quality can be divided into more than two types, and the embodiment of the present application does not limit this.

Step 802, the first network device sends a handover request message to at least one second network device according to the measurement result.

In this embodiment, the second network device also refers to a candidate target network device, and the number of the second network devices may be one or multiple. For example, the first network device may select, as the second network device, a network device with better wireless signal quality with the terminal according to the measurement result reported by the terminal.

The handover request message is used for requesting handover of the terminal to the at least one second network device.

Optionally, the cell of the second network device and the cell of the first network device belong to the same cell group. That is, before sending a handover request message to a second network device, a first network device determines whether a cell of the second network device and a cell of the first network device belong to the same cell group; if the first network equipment belongs to the same cell group, the first network equipment sends or preferentially sends a switching request message to the second network equipment; otherwise, the first network device does not send the handover request message to the second network device, or the priority of sending the handover request message to the second network device is reduced.

Step 803, the first network device receives a handover confirmation message sent by a target second network device of the at least one second network device.

The target second network device is one of the at least one second network device.

The second network device determines whether to allow the terminal to switch to the second network device after receiving the handover request message sent by the first network device, and if the terminal is allowed to switch to the second network device, the second network device may send a handover confirmation message to the first network device, where the handover confirmation message is used to indicate that the handover of the terminal to the second network device is confirmed. The handover confirm message may also be referred to as a handover request reply message.

After receiving a handover confirmation message sent by a certain second network device, the first network device may know that the second network device allows the terminal to perform handover, and at this time, the first network device may determine to handover the terminal from the first network device to the second network device.

In this embodiment, when the target second network device satisfies the specified condition, the first network device does not need to send a handover command to the terminal, and completes handover of the terminal from the first network device to the target second network device. That is, when the terminal is switched from the cell of the first network device to the cell of the target second network device, the terminal may directly perform data transmission with the target second network device without adjusting the configuration or initiating a connection establishment request to the target second network device.

Optionally, the specified condition includes at least one of:

(1) the cell of the target second network device and the cell of the first network device share the same PCI, and the beam configurations of the cell of the target second network device and the cell of the first network device are different;

(4) the time advance corresponding to the cell of the target second network device and/or the time advance corresponding to the cell of the first network device meet the condition. For example, the target second network device and the first network device belong to the same TAG, or the TA of the serving cell of the target second network device is 0, or the TA difference between the terminal and the first network device and/or the target second network device is smaller than a threshold value, or the target second network device may acquire the TA of the first network device, or the target second network device may perform TA adjustment based on the TA of the first network device, and so on.

Of course, the target second network device may also notify the first network device in other manners, and does not need to send a handover command to the terminal, which is not limited in this embodiment of the present application. In addition, the target second network device may detect whether the cell of the target second network device and the cell of the first network device belong to the same cell group and satisfy the first characteristic, and if the target second network device detects that the cell of the target second network device and the cell of the first network device belong to the same cell group and satisfy the first characteristic, the target second network device may notify the first network device in the manner described above when sending the handover confirmation message to the first network device, without sending the handover command to the terminal.

Step 804, the first network device releases the context information of the terminal when determining to switch the terminal to the target second network device and confirming that the target second network device meets the specified condition. In this case, the first network device does not send a handover command to the terminal, and handover that is not perceived by the terminal is achieved.

Step 805, data transmission is performed between the terminal and the target second network device.

It should be noted that, if the first network device receives the handover confirmation messages sent by the at least two second network devices, the first network device selects one second network device from the at least two second network devices as the target second network device.

For example, the target second network device may be a second network device belonging to the same cell group as the cell of the first network device, or the target second network device may be a second network device with the best channel quality in the cell, or the target second network device may be a second network device capable of supporting a specific service (e.g., a high priority service, a GBR service, etc.) of the terminal. And under the condition that the selected target second network equipment meets the specified conditions, the first network equipment does not need to send a switching command to the terminal, and the switching without perception of the terminal is realized.

In addition, if the target second network device selected by the first network device does not satisfy the specified condition, the first network device sends a handover command (such as an HO command message) to the terminal, and triggers the terminal to initiate a connection establishment request (such as a random access request) to the target second network device, requesting to establish a connection with the target second network device.

In summary, in this embodiment, for the handover scheme based on the downlink reference signal measurement report, the network side may also implement handover to the serving cell of the terminal without sending a handover command to the terminal, implement handover that is not perceived by the terminal, and contribute to saving signaling overhead.

It should be noted that, in the above method embodiment, the technical solution of the present application is described mainly from the perspective of interaction between the first network device, the second network device, and the terminal. The steps executed by the first network device can be realized independently as a switching control method of the first network device side; the steps executed by the second network device can be realized independently as a switching control method of the second network device side; the above steps executed by the terminal can be implemented as a handover control method on the terminal side.

The following are embodiments of the apparatus of the present application that may be used to perform embodiments of the method of the present application. For details which are not disclosed in the embodiments of the apparatus of the present application, reference is made to the embodiments of the method of the present application.

Referring to fig. 9, a block diagram of a handover control apparatus according to an embodiment of the present application is shown. The apparatus has a function of implementing the method example of the first network device side, and the function may be implemented by hardware or by hardware executing corresponding software. The apparatus may be the first network device described above, or may be provided in the first network device. As shown in fig. 9, the apparatus 900 may include: configuration information sending module 910 and measurement indication sending module 920

A configuration information sending module 910, configured to send first configuration information to the terminal, where the first configuration information is used to indicate a sending configuration of the first signal.

A measurement indication sending module 920, configured to send measurement indication information to a second network devices, where the measurement indication information is used to indicate the second network devices to measure the first signal sent by the terminal, so as to obtain a first measurement result, and the first measurement result is used to decide whether to switch the network device connected to the terminal, where a is a positive integer.

In an exemplary embodiment, the first signal belongs to an uplink reference signal.

In an exemplary embodiment, the measurement indication information includes: the first configuration information; and/or a first measurement activation instruction for triggering the a second network devices to activate measurement of the first signal.

In an exemplary embodiment, the measurement indication information includes at least one of: a measurement start time of the first signal, a measurement end time of the first signal, a measurement duration of the first signal, and a measurement period of the first signal.

In an exemplary embodiment, the apparatus 900 further comprises:

the uplink signal measuring module is used for measuring the first signal to obtain a second measuring result;

a measurement result receiving module, configured to receive the first measurement result sent by b second network devices in the a second network devices, where b is a positive integer smaller than or equal to a;

a handover request sending module, configured to send a handover request message to a target second network device when the second measurement result meets a first condition and the first measurement result sent by the target second network device in the b second network devices meets a second condition, or when the first measurement result sent by the target second network device meets the second condition, where the handover request message is used to request to handover the terminal to the target second network device.

In an exemplary embodiment, the first condition includes any one of: the second measurement result is less than or equal to a first threshold value; the second measurement result is less than or equal to the first threshold value for N consecutive times; the duration of the second measurement result which is less than or equal to the first threshold value is greater than or equal to a first duration; and the duration of the second measurement result which is less than or equal to the first threshold value for N consecutive times is greater than or equal to the first duration; wherein N is a positive integer.

In an exemplary embodiment, the second condition includes any one of: the first measurement result is greater than or equal to a second threshold value; the first measurement result is greater than or equal to the second threshold value M times in succession; the duration of the first measurement result which is greater than or equal to the second threshold value is greater than or equal to a second duration; and the duration of the first measurement result which is greater than or equal to the second threshold value for M consecutive times is greater than or equal to the second duration; wherein M is a positive integer.

In an exemplary embodiment, the apparatus 900 further comprises: a feedback instruction sending module, configured to send a measurement feedback instruction to the a second network devices when the second measurement result meets a third condition, where the measurement feedback instruction is used to instruct the a second network devices to send the first measurement result to the first network device.

In an exemplary embodiment, the apparatus 900 further comprises: an indication information receiving module, configured to receive handover indication information sent by b second network devices in the a second network devices, where the handover indication information sent by a target second network device in the b second network devices is used to indicate that the terminal is to be handed over to the target second network device, and b is a positive integer smaller than or equal to a.

In an exemplary embodiment, the apparatus 900 further comprises:

and the measurement result sending module is used for sending the second measurement result to the a second network devices.

In an exemplary embodiment, the apparatus 900 further comprises: a measurement indication sending module, configured to send the measurement indication information to the a second network devices when a second measurement result obtained by the first network device measuring the first signal satisfies a fourth condition.

In an exemplary embodiment, the apparatus 900 further comprises: a handover command sending module, configured to send a handover command to the terminal, where the handover command is used to instruct the terminal to handover from the first network device to a target second network device in the a second network devices.

In an exemplary embodiment, the apparatus 900 further comprises:

a confirmation message receiving module, configured to receive a handover confirmation message sent by a target second network device in the a second network devices, where the handover confirmation message is used to confirm that the terminal is handed over to the target second network device;

In an exemplary embodiment, the specified condition includes at least one of:

the cell of the target second network device and the cell of the first network device belong to the same cell group and meet a first characteristic;

the switching confirmation message does not carry resource allocation information, and the resource allocation information is used for indicating the target second network equipment to allocate resources to the terminal; and the number of the first and second groups,

the handover confirmation message indicates that the resource configuration provided by the target second network device for the terminal is the same as the resource configuration provided by the first network device for the terminal.

In an exemplary embodiment, the first feature includes at least one of:

the cell of the target second network device and the cell of the first network device share the same Physical Cell Identity (PCI), and the beam configurations of the cell of the target second network device and the cell of the first network device are different;

the cell of the target second network device and the cell of the first network device share the same virtual PCI, and the terminal uses the virtual PCI for scrambling and decoding when communicating with the target second network device and the first network device;

the cell of the target second network device and the cell of the first network device share radio resources; and the number of the first and second groups,

and the time advance corresponding to the cell of the target second network equipment and/or the time advance corresponding to the cell of the first network equipment meet the condition.

Referring to fig. 10, a block diagram of a handover control apparatus according to another embodiment of the present application is shown. The apparatus has a function of implementing the method example of the second network device side, and the function may be implemented by hardware or by hardware executing corresponding software. The apparatus may be the second network device described above, or may be provided in the second network device. As shown in fig. 10, the apparatus 1000 may include: a measurement indication receiving module 1010 and an uplink signal measuring module 1020.

A measurement indication receiving module 1010, configured to receive measurement indication information sent by a first network device.

An uplink signal measurement module 1020, configured to measure a first signal sent by a terminal according to the measurement indication information to obtain a first measurement result, where the first measurement result is used to decide whether to switch a network device connected to the terminal.

In an exemplary embodiment, the apparatus 1000 further comprises: and the measurement receiving and sending module is used for sending the first measurement result to the first network equipment.

In an exemplary embodiment, the measurement receiving and sending module is configured to: sending the first measurement result to the first network equipment every time the first measurement result is obtained; or, processing a first measurement result obtained within a period of time to obtain a processed first measurement result, and sending the processed first measurement result to the first network device; or, when the first measurement result meets a fifth condition, sending the first measurement result to the first network device; or after receiving a measurement feedback instruction sent by the first network device, sending the first measurement result to the first network device; or after receiving a measurement feedback instruction sent by the first network device, and when the first measurement result meets a sixth condition, sending the first measurement result to the first network device.

In an exemplary embodiment, the apparatus 1000 further comprises:

a measurement result receiving module, configured to receive a second measurement result sent by the first network device, where the second measurement result is a result obtained by measuring the first signal by the first network device;

a handover indication sending module, configured to send handover indication information to the first network device when the second measurement result meets a first condition and the first measurement result meets a second condition, or when the first measurement result meets the second condition, where the handover indication information is used to indicate that the terminal is handed over to the second network device.

In an exemplary embodiment, the apparatus 1000 further comprises: an obtaining request sending module, configured to send a measurement result obtaining request to the first network device when the first measurement result meets a seventh condition, where the measurement result obtaining request is used to request to obtain the second measurement result.

Referring to fig. 11, a block diagram of a handover control apparatus according to another embodiment of the present application is shown. The apparatus has a function of implementing the above method example at the terminal side, and the function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The apparatus may be the terminal described above, or may be provided in the terminal. As shown in fig. 11, the apparatus 1100 may include: a configuration information receiving module 1110 and an uplink signal transmitting module 1120.

A configuration information receiving module 1110, configured to receive first configuration information, where the first configuration information is used to indicate a sending configuration of a first signal.

An uplink signal sending module 1120, configured to send the first signal according to the first configuration information; and the measurement result of the first signal is used for a network side to decide whether to switch the network equipment connected with the terminal.

Referring to fig. 12, a block diagram of a handover control apparatus according to another embodiment of the present application is shown. The apparatus has a function of implementing the method example of the first network device side, and the function may be implemented by hardware or by hardware executing corresponding software. The apparatus may be the first network device described above, or may be provided in the first network device. As shown in fig. 12, the apparatus 1200 may include: a measurement result receiving module 1210, a handover request transmitting module 1220, an acknowledgement message receiving module 1230, and a specified condition confirming module 1240.

The measurement result receiving module 1210 is configured to receive a measurement result of a downlink reference signal sent by a terminal.

A handover request sending module 1220, configured to send, according to the measurement result, a handover request message to at least one second network device, where the handover request message is used to request to handover the terminal to the at least one second network device.

A confirmation message receiving module 1230, configured to receive a handover confirmation message sent by a target second network device in the at least one second network device, where the handover confirmation message is used to confirm that the terminal is handed over to the target second network device.

A specified condition confirmation module 1240, configured to not send a handover command to the terminal when confirming that the target second network device satisfies the specified condition.

In an exemplary embodiment, the specified condition includes at least one of:

In an exemplary embodiment, the first feature includes at least one of:

In an exemplary embodiment, the cell of the second network device and the cell of the first network device belong to the same cell group.

In an exemplary embodiment, the apparatus 1200 further comprises: a target device selection module, configured to select, when the first network device receives a handover confirmation message sent by at least two second network devices, the target second network device from the at least two second network devices;

the target second network device is a second network device belonging to the same cell group as the cell of the first network device, or the target second network device is a second network device with the best channel quality in the cell, or the target second network device is a second network device capable of supporting a specific service of the terminal.

It should be noted that, when the apparatus provided in the foregoing embodiment implements the functions thereof, only the division of the above functional modules is illustrated, and in practical applications, the above functions may be distributed by different functional modules according to actual needs, that is, the content structure of the device is divided into different functional modules, so as to complete all or part of the functions described above.

With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.

Referring to fig. 13, a schematic structural diagram of a network device 130 according to an embodiment of the present application is shown. The network device 130 may be a satellite or a base station. The network device 130 may include: processor 131, receiver 132, transmitter 133, memory 134, and bus 135.

The processor 131 includes one or more processing cores, and the processor 131 executes various functional applications and information processing by executing software programs and modules.

The receiver 132 and the transmitter 133 may be implemented as one communication component, which may be a communication chip.

The memory 134 is coupled to the processor 131 by a bus 135.

The memory 134 may be used for storing a computer program, which the processor 131 is used for executing to implement the respective steps performed by the first network device in the above-described method embodiments or to implement the respective steps performed by the second network device in the above-described method embodiments.

Further, the memory 134 may be implemented by any type or combination of volatile or non-volatile storage devices, including, but not limited to: magnetic or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), Static Random Access Memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM).

Referring to fig. 14, which shows a schematic structural diagram of a terminal 140 according to an embodiment of the present application, the terminal 140 may include: processor 141, receiver 142, transmitter 143, memory 144, and bus 145.

The processor 141 includes one or more processing cores, and the processor 141 executes various functional applications and information processing by running software programs and modules.

The receiver 142 and the transmitter 143 may be implemented as one communication component, which may be a communication chip.

The memory 144 is coupled to the processor 141 by a bus 145.

The memory 144 may be used for storing computer programs for execution by the processor 141 for carrying out the various steps performed by the terminal in the above-described method embodiments.

Further, the memory 144 may be implemented by any type or combination of volatile or non-volatile storage devices, including, but not limited to: magnetic or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), Static Random Access Memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM).

The embodiment of the application also provides a computer-readable storage medium, in which a computer program is stored, and the computer program is loaded and executed by a processor to implement the handover control method on the network device side.

The embodiment of the application also provides a computer-readable storage medium, in which a computer program is stored, and the computer program is loaded and executed by a processor to implement the above-mentioned switching control method on the terminal side.

The application also provides a computer program product, which enables a computer to execute the switching control method of the network equipment side when the computer program product runs on the computer.

The present application also provides a computer program product, which when running on a computer, causes the computer to execute the above-mentioned terminal-side handover control method.

Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in the embodiments of the present application may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above description is only exemplary of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

A method of handover control, the method comprising:

the method comprises the steps that first network equipment sends first configuration information to a terminal, wherein the first configuration information is used for indicating sending configuration of a first signal;

the first network device sends measurement indication information to a second network devices, where the measurement indication information is used to indicate the second network devices to measure the first signal sent by the terminal, so as to obtain a first measurement result, and the first measurement result is used to decide whether to switch the network device connected to the terminal, where a is a positive integer.
The method of claim 1, wherein the first signal belongs to an uplink reference signal.
The method according to claim 1 or 2, wherein the measurement indication information comprises:

the first configuration information;

and/or the presence of a gas in the gas,

a first measurement activation instruction for triggering the a second network devices to activate measurement of the first signal.
The method according to any of claims 1 to 3, wherein the measurement indication information comprises at least one of: a measurement start time of the first signal, a measurement end time of the first signal, a measurement duration of the first signal, and a measurement period of the first signal.
The method according to any one of claims 1 to 4, wherein after the first network device sends the configuration information of the first signal to the terminal, the method further comprises:

the first network equipment measures the first signal to obtain a second measurement result;

the first network device receives the first measurement results sent by b second network devices in the a second network devices, wherein b is a positive integer smaller than or equal to a;

when the second measurement result meets a first condition and the first measurement result sent by a target second network device of the b second network devices meets a second condition, or when the first measurement result sent by the target second network device meets the second condition, the first network device sends a handover request message to the target second network device, where the handover request message is used to request that the terminal is handed over to the target second network device.
The method of claim 5, wherein the first condition comprises any one of:

the second measurement result is less than or equal to a first threshold value;

the second measurement result is less than or equal to the first threshold value for N consecutive times;

the duration of the second measurement result which is less than or equal to the first threshold value is greater than or equal to a first duration; and the number of the first and second groups,

the duration of the second measurement result which is less than or equal to the first threshold value for N consecutive times is greater than or equal to the first duration;

wherein N is a positive integer.
The method according to claim 5 or 6, wherein the second condition comprises any one of:

the first measurement result is greater than or equal to a second threshold value;

the first measurement result is greater than or equal to the second threshold value M times in succession;

the duration of the first measurement result which is greater than or equal to the second threshold value is greater than or equal to a second duration; and the number of the first and second groups,

the duration of the first measurement result which is greater than or equal to the second threshold value for M consecutive times is greater than or equal to the second duration;

wherein M is a positive integer.
The method according to any of claims 5 to 7, wherein the first network device measures the first signal and obtains a second measurement result, further comprising:

when the second measurement result meets a third condition, the first network device sends a measurement feedback instruction to the a second network devices, where the measurement feedback instruction is used to instruct the a second network devices to send the first measurement result to the first network device.
The method according to any one of claims 1 to 4, wherein after the first network device sends the measurement indication information to the a second network devices, the method further comprises:

the first network device receives handover indication information sent by b second network devices in the a second network devices, where the handover indication information sent by a target second network device in the b second network devices is used to indicate that the terminal is to be handed over to the target second network device, and b is a positive integer less than or equal to a.
The method according to claim 9, wherein before the first network device receives the handover indication information sent by b second network devices of the a second network devices, the method further comprises:

the first network equipment measures the first signal to obtain a second measurement result;

the first network device sends the second measurement result to the a second network devices.
The method according to any one of claims 1 to 10, wherein after the first network device sends the first configuration information to the terminal, the method further comprises:

and when a second measurement result obtained by measuring the first signal by the first network equipment meets a fourth condition, the first network equipment sends the measurement indication information to the a second network equipment.
The method according to any one of claims 1 to 11, wherein after the first network device sends the measurement indication information to the a second network devices, the method further comprises:

the first network device sends a handover command to the terminal, wherein the handover command is used for instructing the terminal to handover from the first network device to a target second network device in the a second network devices.
The method according to any one of claims 1 to 11, wherein after the first network device sends the measurement indication information to the a second network devices, the method further comprises:

the first network device receives a handover confirmation message sent by a target second network device in the a second network devices, wherein the handover confirmation message is used for confirming that the terminal is handed over to the target second network device;

and the first network equipment does not send a switching command to the terminal under the condition that the first network equipment confirms that the target second network equipment meets the specified condition.
The method of claim 13, wherein the specified condition comprises at least one of:

the cell of the target second network device and the cell of the first network device belong to the same cell group and meet a first characteristic;

the switching confirmation message does not carry resource allocation information, and the resource allocation information is used for indicating the target second network equipment to allocate resources to the terminal; and the number of the first and second groups,

the handover confirmation message indicates that the resource configuration provided by the target second network device for the terminal is the same as the resource configuration provided by the first network device for the terminal.
The method of claim 14, wherein the first characteristic comprises at least one of:

the cell of the target second network device and the cell of the first network device share the same Physical Cell Identity (PCI), and the beam configurations of the cell of the target second network device and the cell of the first network device are different;

the cell of the target second network device and the cell of the first network device share the same virtual PCI, and the terminal uses the virtual PCI for scrambling and decoding when communicating with the target second network device and the first network device;

the cell of the target second network device and the cell of the first network device share radio resources; and the number of the first and second groups,

and the time advance corresponding to the cell of the target second network equipment and/or the time advance corresponding to the cell of the first network equipment meet the condition.
A method of handover control, the method comprising:

the second network equipment receives measurement indication information sent by the first network equipment;

and the second network equipment measures a first signal sent by the terminal according to the measurement indication information to obtain a first measurement result, and the first measurement result is used for deciding whether to switch the network equipment connected with the terminal.
The method of claim 16, wherein after the second network device measures the first signal sent by the terminal according to the measurement indication information to obtain the first measurement result, the method further comprises:

the second network device sends the first measurement result to the first network device.
The method of claim 17, wherein sending the first measurement result to the first network device by the second network device comprises:

the second network equipment sends the first measurement result to the first network equipment every time the second network equipment obtains the first measurement result; alternatively, the first and second electrodes may be,

the second network equipment processes the first measurement result obtained within a period of time to obtain a processed first measurement result, and sends the processed first measurement result to the first network equipment; alternatively, the first and second electrodes may be,

the second network device sends the first measurement result to the first network device when the first measurement result meets a fifth condition; alternatively, the first and second electrodes may be,

after receiving a measurement feedback instruction sent by the first network device, the second network device sends the first measurement result to the first network device; alternatively, the first and second electrodes may be,

after receiving the measurement feedback instruction sent by the first network device, and when the first measurement result meets a sixth condition, the second network device sends the first measurement result to the first network device.
The method of claim 16, further comprising:

the second network device receives a second measurement result sent by the first network device, where the second measurement result is a result obtained by the first network device measuring the first signal;

when the second measurement result meets a first condition and the first measurement result meets a second condition, or when the first measurement result meets the second condition, the second network device sends switching indication information to the first network device, wherein the switching indication information is used for indicating that the terminal is switched to the second network device.
The method of claim 19, wherein after the second network device measures the first signal sent by the terminal according to the measurement indication information to obtain the first measurement result, the method further comprises:

and when the first measurement result meets a seventh condition, the second network device sends a measurement result acquisition request to the first network device, wherein the measurement result acquisition request is used for requesting to acquire the second measurement result.
A method of handover control, the method comprising:

a terminal receives first configuration information, wherein the first configuration information is used for indicating the sending configuration of a first signal;

the terminal sends the first signal according to the first configuration information;

and the measurement result of the first signal is used for a network side to decide whether to switch the network equipment connected with the terminal.
A method of handover control, the method comprising:

a first network device receives a measurement result of a downlink reference signal sent by a terminal;

the first network equipment sends a switching request message to at least one second network equipment according to the measurement result, wherein the switching request message is used for requesting to switch the terminal to the at least one second network equipment;

the first network device receives a handover confirmation message sent by a target second network device of the at least one second network device, wherein the handover confirmation message is used for confirming that the terminal is handed over to the target second network device;

and the first network equipment does not send a switching command to the terminal under the condition that the first network equipment confirms that the target second network equipment meets the specified condition.
The method of claim 22, wherein the specified condition comprises at least one of:

the cell of the target second network device and the cell of the first network device belong to the same cell group and meet a first characteristic;

the switching confirmation message does not carry resource allocation information, and the resource allocation information is used for indicating the target second network equipment to allocate resources to the terminal; and the number of the first and second groups,

the handover confirmation message indicates that the resource configuration provided by the target second network device for the terminal is the same as the resource configuration provided by the first network device for the terminal.
The method of claim 23, wherein the first characteristic comprises at least one of:

the cell of the target second network device and the cell of the first network device share the same Physical Cell Identity (PCI), and the beam configurations of the cell of the target second network device and the cell of the first network device are different;

the cell of the target second network device and the cell of the first network device share the same virtual PCI, and the terminal uses the virtual PCI for scrambling and decoding when communicating with the target second network device and the first network device;

the cell of the target second network device and the cell of the first network device share radio resources; and the number of the first and second groups,

and the time advance corresponding to the cell of the target second network equipment and/or the time advance corresponding to the cell of the first network equipment meet the condition.
The method according to any of claims 22 to 24, wherein the cell of the second network device and the cell of the first network device belong to the same cell group.
The method according to any of claims 22 to 25, wherein after the first network device sends a handover request message to at least one second network device according to the measurement result, the method further comprises:

if the first network device receives a handover confirmation message sent by at least two second network devices, the first network device selects the target second network device from the at least two second network devices;

the target second network device is a second network device belonging to the same cell group as the cell of the first network device, or the target second network device is a second network device with the best channel quality in the cell, or the target second network device is a second network device capable of supporting a specific service of the terminal.
A handover control apparatus, applied to a first network device, the apparatus comprising:

a configuration information sending module, configured to send first configuration information to a terminal, where the first configuration information is used to indicate a sending configuration of a first signal;

a measurement indication sending module, configured to send measurement indication information to a second network devices, where the measurement indication information is used to indicate the second network devices to measure the first signal sent by the terminal, so as to obtain a first measurement result, and the first measurement result is used to decide whether to switch the network device connected to the terminal, where a is a positive integer.
The apparatus of claim 27, wherein the first signal belongs to an uplink reference signal.
The apparatus according to claim 27 or 28, wherein the measurement indication information comprises:

the first configuration information;

and/or the presence of a gas in the gas,

a first measurement activation instruction for triggering the a second network devices to activate measurement of the first signal.
The apparatus according to any of claims 27 to 29, wherein the measurement indication information comprises at least one of: a measurement start time of the first signal, a measurement end time of the first signal, a measurement duration of the first signal, and a measurement period of the first signal.
The apparatus of any one of claims 27 to 30, further comprising:

the uplink signal measuring module is used for measuring the first signal to obtain a second measuring result;

a measurement result receiving module, configured to receive the first measurement result sent by b second network devices in the a second network devices, where b is a positive integer smaller than or equal to a;

a handover request sending module, configured to send a handover request message to a target second network device when the second measurement result meets a first condition and the first measurement result sent by the target second network device in the b second network devices meets a second condition, or when the first measurement result sent by the target second network device meets the second condition, where the handover request message is used to request to handover the terminal to the target second network device.
The apparatus of claim 31, wherein the first condition comprises any one of:

the second measurement result is less than or equal to a first threshold value;

the second measurement result is less than or equal to the first threshold value for N consecutive times;

the duration of the second measurement result which is less than or equal to the first threshold value is greater than or equal to a first duration; and the number of the first and second groups,

the duration of the second measurement result which is less than or equal to the first threshold value for N consecutive times is greater than or equal to the first duration;

wherein N is a positive integer.
The apparatus of claim 31 or 32, wherein the second condition comprises any one of:

the first measurement result is greater than or equal to a second threshold value;

the first measurement result is greater than or equal to the second threshold value M times in succession;

the duration of the first measurement result which is greater than or equal to the second threshold value is greater than or equal to a second duration; and the number of the first and second groups,

the duration of the first measurement result which is greater than or equal to the second threshold value for M consecutive times is greater than or equal to the second duration;

wherein M is a positive integer.
The apparatus of any one of claims 31 to 33, further comprising:

a feedback instruction sending module, configured to send a measurement feedback instruction to the a second network devices when the second measurement result meets a third condition, where the measurement feedback instruction is used to instruct the a second network devices to send the first measurement result to the first network device.
The apparatus of any one of claims 27 to 30, further comprising:

an indication information receiving module, configured to receive handover indication information sent by b second network devices in the a second network devices, where the handover indication information sent by a target second network device in the b second network devices is used to indicate that the terminal is to be handed over to the target second network device, and b is a positive integer smaller than or equal to a.
The apparatus of claim 35, further comprising:

the uplink signal measuring module is used for measuring the first signal to obtain a second measuring result;

and the measurement result sending module is used for sending the second measurement result to the a second network devices.
The method of any one of claims 27 to 36, wherein the apparatus further comprises:

a measurement indication sending module, configured to send the measurement indication information to the a second network devices when a second measurement result obtained by the first network device measuring the first signal satisfies a fourth condition.
The apparatus of any one of claims 27 to 37, further comprising:

a handover command sending module, configured to send a handover command to the terminal, where the handover command is used to instruct the terminal to handover from the first network device to a target second network device in the a second network devices.
The apparatus of any one of claims 27 to 37, further comprising:

a confirmation message receiving module, configured to receive a handover confirmation message sent by a target second network device in the a second network devices, where the handover confirmation message is used to confirm that the terminal is handed over to the target second network device;

and the appointed condition confirmation module is used for not sending a switching command to the terminal under the condition that the target second network equipment meets the appointed condition.
The apparatus of claim 39, wherein the specified condition comprises at least one of:

the cell of the target second network device and the cell of the first network device belong to the same cell group and meet a first characteristic;

the switching confirmation message does not carry resource allocation information, and the resource allocation information is used for indicating the target second network equipment to allocate resources to the terminal; and the number of the first and second groups,

the handover confirmation message indicates that the resource configuration provided by the target second network device for the terminal is the same as the resource configuration provided by the first network device for the terminal.
The apparatus of claim 40, wherein the first characteristic comprises at least one of:

the cell of the target second network device and the cell of the first network device share the same Physical Cell Identity (PCI), and the beam configurations of the cell of the target second network device and the cell of the first network device are different;

the cell of the target second network device and the cell of the first network device share the same virtual PCI, and the terminal uses the virtual PCI for scrambling and decoding when communicating with the target second network device and the first network device;

the cell of the target second network device and the cell of the first network device share radio resources; and the number of the first and second groups,

and the time advance corresponding to the cell of the target second network equipment and/or the time advance corresponding to the cell of the first network equipment meet the condition.
A handover control apparatus, applied to a second network device, the apparatus comprising:

a measurement indication receiving module, configured to receive measurement indication information sent by a first network device;

and the uplink signal measurement module is used for measuring a first signal sent by the terminal according to the measurement indication information to obtain a first measurement result, and the first measurement result is used for deciding whether to switch the network equipment connected with the terminal.
The apparatus of claim 42, further comprising:

and the measurement receiving and sending module is used for sending the first measurement result to the first network equipment.
The apparatus of claim 43, wherein the measurement receiving and sending module is configured to:

sending the first measurement result to the first network equipment every time the first measurement result is obtained; alternatively, the first and second electrodes may be,

processing a first measurement result obtained within a period of time to obtain a processed first measurement result, and sending the processed first measurement result to the first network device; alternatively, the first and second electrodes may be,

when the first measurement result meets a fifth condition, sending the first measurement result to the first network equipment; alternatively, the first and second electrodes may be,

after receiving a measurement feedback instruction sent by the first network equipment, sending the first measurement result to the first network equipment; alternatively, the first and second electrodes may be,

after a measurement feedback instruction sent by the first network device is received and when the first measurement result meets a sixth condition, the first measurement result is sent to the first network device.
The apparatus of claim 42, further comprising:

a measurement result receiving module, configured to receive a second measurement result sent by the first network device, where the second measurement result is a result obtained by measuring the first signal by the first network device;

a handover indication sending module, configured to send handover indication information to the first network device when the second measurement result meets a first condition and the first measurement result meets a second condition, or when the first measurement result meets the second condition, where the handover indication information is used to indicate that the terminal is handed over to the second network device.
The apparatus of claim 45, further comprising:

an obtaining request sending module, configured to send a measurement result obtaining request to the first network device when the first measurement result meets a seventh condition, where the measurement result obtaining request is used to request to obtain the second measurement result.
A handover control apparatus, applied to a terminal, the apparatus comprising:

a configuration information receiving module, configured to receive first configuration information, where the first configuration information is used to indicate a sending configuration of a first signal;

an uplink signal sending module, configured to send the first signal according to the first configuration information;

and the measurement result of the first signal is used for a network side to decide whether to switch the network equipment connected with the terminal.
A handover control apparatus, applied to a first network device, the apparatus comprising:

a measurement result receiving module, configured to receive a measurement result of a downlink reference signal sent by a terminal;

a handover request sending module, configured to send a handover request message to at least one second network device according to the measurement result, where the handover request message is used to request to handover the terminal to the at least one second network device;

a confirmation message receiving module, configured to receive a handover confirmation message sent by a target second network device in the at least one second network device, where the handover confirmation message is used to confirm that the terminal is handed over to the target second network device;

and the appointed condition confirmation module is used for not sending a switching command to the terminal under the condition that the target second network equipment meets the appointed condition.
The apparatus of claim 48, wherein the specified conditions comprise at least one of:

the cell of the target second network device and the cell of the first network device belong to the same cell group and meet a first characteristic;

the handover confirmation message does not carry resource allocation information, and the resource allocation information is used for indicating the target second network device to allocate resources to the terminal; and the number of the first and second groups,

the handover confirmation message indicates that the resource configuration provided by the target second network device for the terminal is the same as the resource configuration provided by the first network device for the terminal.
The apparatus of claim 49, wherein the first characteristic comprises at least one of:

the cell of the target second network device and the cell of the first network device share the same Physical Cell Identity (PCI), and the beam configurations of the cell of the target second network device and the cell of the first network device are different;

the cell of the target second network device and the cell of the first network device share the same virtual PCI, and the terminal uses the virtual PCI for scrambling and decoding when communicating with the target second network device and the first network device;

the cell of the target second network device and the cell of the first network device share radio resources; and the number of the first and second groups,

and the time advance corresponding to the cell of the target second network equipment and/or the time advance corresponding to the cell of the first network equipment meet the condition.
The apparatus of any of claims 48 to 50, wherein the cell of the second network device and the cell of the first network device belong to the same cell group.
The apparatus of any one of claims 48 to 51, further comprising:

a target device selection module, configured to select, when the first network device receives a handover confirmation message sent by at least two second network devices, the target second network device from the at least two second network devices;

the target second network device is a second network device belonging to the same cell group as the cell of the first network device, or the target second network device is a second network device with the best channel quality in the cell, or the target second network device is a second network device capable of supporting a specific service of the terminal.
A network device comprising a processor and a memory, the memory storing a computer program for execution by the processor to implement a handover control method according to any one of claims 1 to 15, or to implement a handover control method according to any one of claims 16 to 20, or to implement a handover control method according to any one of claims 22 to 26.
A terminal, characterized in that the terminal comprises a processor and a memory, the memory storing a computer program for execution by the processor to implement the handover control method according to claim 21.
A computer-readable storage medium, in which a computer program is stored, the computer program being adapted to be executed by a processor to implement the handover control method according to any one of claims 1 to 15, or to implement the handover control method according to any one of claims 16 to 20, or to implement the handover control method according to any one of claims 22 to 26.
A computer-readable storage medium, in which a computer program is stored, the computer program being for execution by a processor to implement the handover control method of claim 21.