WO2021022489A1 - 切换控制方法、装置、设备及存储介质 - Google Patents

切换控制方法、装置、设备及存储介质 Download PDF

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Publication number
WO2021022489A1
WO2021022489A1 PCT/CN2019/099500 CN2019099500W WO2021022489A1 WO 2021022489 A1 WO2021022489 A1 WO 2021022489A1 CN 2019099500 W CN2019099500 W CN 2019099500W WO 2021022489 A1 WO2021022489 A1 WO 2021022489A1
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Prior art keywords
network device
measurement result
terminal
target
measurement
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PCT/CN2019/099500
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English (en)
French (fr)
Inventor
杨宁
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Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2019/099500 priority Critical patent/WO2021022489A1/zh
Priority to CN201980092590.6A priority patent/CN113615245B/zh
Publication of WO2021022489A1 publication Critical patent/WO2021022489A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a switching control method, device, device, and storage medium.
  • the terminal In a mobile communication system, due to the mobility of the terminal, the terminal will switch between different serving cells, that is, establish connections with different base stations.
  • the handover scheme adopted by the cellular communication network is as follows: the source base station configures the terminal to measure the downlink reference signal, and the terminal will measure and report the downlink reference signal according to the configuration of the source base station; the source base station reports the measurement result to the target base station based on the measurement result reported by the terminal Send a handover request message, which is used to request the terminal to be handed over from the source base station to the target base station; after the target base station agrees to the handover request message, the source base station sends a handover command to the terminal, which is used to instruct the terminal to switch from the source base station Handover to the target base station; after receiving the handover command, the terminal disconnects from the source base station and initiates a random access procedure to the target base station to establish a connection with the target base station, thereby completing the handover from the source base station to the target base station.
  • NTN Non Terrestrial Network, non-terrestrial communication network
  • satellite communication is generally used to provide communication services to ground users.
  • the wireless signal transmission delay between the terminal and the satellite is relatively long, and the satellite has the characteristics of rapid movement relative to the ground. If it is still based on the downlink reference signal measurement and report to decide whether to perform handover, it will cause the base station to reduce the effectiveness of handover judgment and affect the handover performance.
  • the embodiments of the present application provide a switching control method, device, equipment, and storage medium, which can be used to solve the above technical problems.
  • the technical solution is as follows:
  • an embodiment of the present application provides a handover control method, and the method includes:
  • the first network device sends first configuration information to the terminal, where the first configuration information is used to indicate the sending configuration of the first signal;
  • the first network device sends measurement instruction information to a second network device, where the measurement instruction information is used to instruct the a second network device to measure the first signal sent by the terminal to obtain the first signal A measurement result, the first measurement result is used to decide whether to switch the network device connected to the terminal, and the a is a positive integer.
  • an embodiment of the present application provides a handover control method, and the method includes:
  • the second network device receives the measurement instruction information sent by the first network device
  • the second network device measures the first signal sent by the terminal according to the measurement instruction information 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.
  • an embodiment of the present application provides a handover control method, and the method includes:
  • the terminal receives first configuration information, where the first configuration information is used to indicate the sending configuration of the first signal;
  • the measurement result of the first signal is used for the network side to decide whether to switch the network device connected to the terminal.
  • an embodiment of the present application provides a handover control method, and the method includes:
  • the first network device receives the measurement result of the downlink reference signal sent by the terminal;
  • the first network device When the first network device confirms that the target second network device satisfies a specified condition, the first network device does not send a switching command to the terminal.
  • an embodiment of the present application provides a handover control device, which is applied to a first network device, and the device includes:
  • a configuration information sending module configured to send first configuration information to the terminal, where the first configuration information is used to indicate the sending configuration of the first signal;
  • the measurement instruction sending module is configured to send measurement instruction information to a second network device, where the measurement instruction information is used to instruct the a second network device to measure the first signal sent by the terminal to obtain The first measurement result, where the first measurement result is used to decide whether to switch the network device connected to the terminal, and the a is a positive integer.
  • an embodiment of the present application provides a handover control device, which is applied to a second network device, and the device includes:
  • the measurement instruction receiving module is configured to receive measurement instruction information sent by the first network device
  • the uplink signal measurement module is configured to measure the first signal sent by the terminal to obtain a first measurement result according to the measurement indication information, and the first measurement result is used to decide whether to switch the network device connected to the terminal.
  • an embodiment of the present application provides a handover control device, which is applied to a terminal, and the device includes:
  • a configuration information receiving module configured to receive first configuration information, where the first configuration information is used to indicate a transmission configuration of the first signal
  • An uplink signal sending module configured to send the first signal according to the first configuration information
  • the measurement result of the first signal is used for the network side to decide whether to switch the network device connected to the terminal.
  • an embodiment of the present application provides a handover control device, which is applied to a first network device, and the device includes:
  • the measurement result receiving module is used to receive the measurement result of the downlink reference signal sent by the 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 switch 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 among the at least one second network device, where the handover confirmation message is used to confirm handover of the terminal to the target second network device ;
  • the designated condition confirmation module is configured to not send a switching command to the terminal when it is confirmed that the target second network device meets the designated condition.
  • an embodiment of the present application provides a network device, the network device includes a processor and a memory, the memory stores a computer program, and the computer program is used to be executed by the processor to implement the foregoing A handover control method on the network device side, and/or a handover control method on the second network device side described above.
  • an embodiment of the present application provides a terminal, the terminal includes a processor and a memory, the memory stores a computer program, and the computer program is used to be executed by the processor to implement the foregoing terminal side Switch control method.
  • an embodiment of the present application provides a computer-readable storage medium in which a computer program is stored, and the computer program is used to be executed by a processor to implement the switching control on the first network device side. Method, and/or implement the handover control method on the second network device side.
  • an embodiment of the present application provides a computer-readable storage medium in which a computer program is stored, and the computer program is used to be executed by a processor to implement the above-mentioned terminal-side switching control method.
  • the network side measures the first signal sent by the terminal, and makes a switching decision based on the measurement result of the first signal. For scenarios with high transmission delay or high mobility between the terminal and the network device, on the one hand, there will be no The problem that the network side cannot obtain the measurement result or obtains the measurement result that has failed, thus ensuring the reliability of the handover.
  • the terminal can smoothly switch from one network device to another network device, ensuring that the network side always serves the terminal
  • the network equipment in turn ensures the reliability of the terminal’s data transmission; on the other hand, the first signal sent by the terminal is measured through the network side, which eliminates the need for the terminal to report the measurement result, thereby reducing the handover
  • the delay also reduces the signaling overhead of the air interface.
  • FIG. 1 is a schematic diagram of a network architecture provided by an embodiment of the present application.
  • Figure 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 provided by an embodiment of the present application.
  • FIG. 5 is a flowchart of a handover control method provided by another embodiment of the present application.
  • FIG. 6 is a flowchart of a handover control method provided by another embodiment of the present application.
  • FIG. 7 is a flowchart of a handover control method provided by another embodiment of the present application.
  • FIG. 8 is a flowchart of a handover control method provided by another embodiment of the present application.
  • FIG. 9 is a block diagram of a handover control device provided by an embodiment of the present application.
  • FIG. 10 is a block diagram of a handover control device provided by another embodiment of the present application.
  • FIG. 11 is a block diagram of a handover control device provided by another embodiment of the present application.
  • FIG. 12 is a block diagram of a handover control device provided by another embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a terminal provided by an embodiment of the present application.
  • FIG. 1 shows a schematic diagram of a network architecture provided by an embodiment of the present application.
  • the network architecture may include: a network device 10 and a terminal 20.
  • the network device 10 is a device for providing wireless communication services for the terminal 20.
  • the network device 10 and the terminal 20 may establish a connection through an air interface, so as to communicate through the connection, including the interaction of signaling and data.
  • the terminal 20 can switch between different network devices 10, that is, establish connections with different network devices 10.
  • the network device 10 in the NTN network may be a satellite 11.
  • a satellite 11 can cover a certain range of the ground area and provide wireless communication services for the terminals 20 on the ground area.
  • the satellite 11 can orbit the earth, and by arranging multiple satellites 11, communication coverage of different areas on the surface of the earth can be achieved.
  • Satellite communication is not restricted by the user's area.
  • general terrestrial communication cannot cover areas where communication equipment cannot be installed, such as oceans, mountains, and deserts, or areas where communication is not covered due to sparse population.
  • Satellites can cover a larger ground, and satellites can orbit the earth, so in theory every corner of the earth can be covered by satellite communications.
  • satellite communications have greater social value. Satellite communication can be covered at a lower cost in remote mountainous areas, poor and backward countries or regions, so that people in these areas can enjoy advanced voice communication and mobile Internet technology, which is conducive to narrowing the digital gap with developed areas and promoting The development of these areas.
  • the satellite communication distance is long, and the communication cost does not increase significantly with the increase of the communication distance; finally, the satellite communication has high stability and is not restricted by natural disasters.
  • LEO Low-Earth Orbit
  • MEO Medium-Earth Orbit
  • GEO Global-Earth Orbit, geosynchronous orbit
  • HEO High Elliptical Orbit (highly elliptical orbit) satellites and so on.
  • LEO Low-Earth Orbit
  • MEO Medium-Earth Orbit
  • GEO Global-Earth Orbit
  • HEO High Elliptical Orbit (highly elliptical orbit) satellites and so on.
  • the main research at this stage is LEO and GEO.
  • the altitude of low-orbit satellites ranges from 500km to 1500km, and the corresponding orbit period is about 1.5 hours to 2 hours.
  • the signal propagation delay of single-hop communication between users is generally less than 20ms.
  • the maximum satellite viewing time is 20 minutes.
  • the signal propagation distance is short, the link loss is small, and the requirement for the transmission power of the user terminal is not high.
  • the signal propagation delay of single-hop communication between users is generally 250ms.
  • satellites In order to ensure satellite coverage and increase the system capacity of the entire satellite communication system, satellites use multiple beams to cover the ground.
  • a satellite can form dozens or even hundreds of beams to cover the ground; a satellite beam can cover tens to hundreds of kilometers in diameter. Ground area.
  • 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 the terminal 20 with wireless communication functions.
  • the base station 12 may include various forms of macro base stations, micro base stations, relay stations, access points, and so on.
  • the names of devices with base station functions may be different.
  • gNodeB or gNB As communication technology evolves, the name "base station" may change.
  • base stations for ease of description, in the embodiments of the present application, the above-mentioned devices that provide wireless communication functions for the terminal 20 are collectively referred to as base stations.
  • the terminal 20 involved in the embodiments of the present application may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment.
  • UE User Equipment
  • MS mobile Station
  • terminal device terminal device
  • the devices mentioned above are collectively referred to as terminals.
  • the technical solutions described in the embodiments of the present application may be applicable to the NTN system or the cellular network system.
  • uplink mobility is used instead of downlink mobility, that is, the terminal sends uplink reference signals to network equipment (such as satellites or base stations), and the network side makes comprehensive judgments and decisions based on the received uplink reference signals How to service the terminal, such as whether the network equipment that serves the terminal needs to be replaced.
  • network equipment such as satellites or base stations
  • the network side measures the uplink reference signal sent by the terminal and makes a handover decision based on the measurement result.
  • the terminal can smoothly switch from one network device to another network device, ensuring that there is always a network device serving the terminal on the network side. In turn, the reliability of terminal data transmission is ensured.
  • the network side needs to send a downlink reference signal, the terminal measures the downlink reference signal, and then reports the measurement result to the network side.
  • the uplink reference signal sent by the terminal is measured through the network side, which eliminates the need for the terminal to report the measurement result, thereby reducing the handover delay and air interface signaling Overhead.
  • the uplink reference signal sent by the terminal is measured through the network side, which eliminates the need for the terminal to perform frequent measurement and reporting, which is beneficial to save power consumption and power of the terminal.
  • FIG. 4 shows a flowchart of a handover control method provided by an embodiment of the present application.
  • the method can be applied to the network architecture shown in FIG. 1 to FIG. 3.
  • the method may include the following steps:
  • Step 401 The first network device sends first configuration information to the terminal.
  • the first network device refers to a network device that is currently connected to the terminal, and the first network device may also be referred to as a source network device.
  • the first configuration information is used to indicate the sending configuration of the first signal, that is, used to inform the terminal how to send the first signal.
  • the first configuration information may be used to indicate to the terminal the time-frequency position of sending the first signal, and may also be used to indicate to the terminal to send the first signal periodically or non-periodically, etc., which is not limited in this embodiment of the application .
  • the first signal belongs to an uplink reference signal.
  • the first signal may be SRS (Sounding Reference Signal, sounding reference signal).
  • the first signal is a terminal-specific signal.
  • the first network device may send the first configuration information to the terminal through dedicated signaling.
  • the dedicated signaling may be a dedicated RRC (Radio Resource Control, radio resource control). Control) message.
  • the first network device sends measurement configuration information to the terminal, and the measurement configuration information carries the first configuration information.
  • the measurement configuration information is information used to provide measurement configuration to the terminal, such as uplink measurement configuration and/or downlink measurement configuration, which is not limited in the embodiment of the present application.
  • the first network device may send the first configuration information to the terminal when the terminal is initially connected; or, the first network device may also meet certain conditions (such as the signal quality between the first network device and the terminal). Poor), send the first configuration information to the terminal.
  • Step 402 The terminal sends a first signal according to the first configuration information.
  • the terminal After receiving the first configuration information, the terminal sends the first signal according to the first configuration information. For example, the terminal occupies the time-frequency resource to transmit the first signal according to the time-frequency resource configured by the first configuration information.
  • the terminal may also determine whether to send the first signal periodically or non-periodically according to the first configuration information, for example, send the first signal when a certain condition is met.
  • the first network device may also send a first send activation instruction to the terminal, where the first send activation instruction is used to trigger the terminal to send the first signal.
  • the terminal After receiving the first sending activation instruction sent by the first network device, the terminal starts sending the first signal.
  • the terminal may send the first signal according to the first configuration information.
  • Step 403 The first network device sends measurement instruction information to a second network devices, where a is a positive integer.
  • the number of the second network device may be one or more.
  • the second network device is a network device other than the first network device, that is, the second network device and the first network device are not the same network device.
  • the second network device is a network device adjacent to the first network device, and the adjacent network device may refer to a network device whose distance is less than a certain threshold, or a network device whose signal quality is greater than a certain threshold, or It may refer to a network device adjacent to the coverage area, which is not limited in the embodiment of the present application.
  • the first network device may determine the above-mentioned a second network device according to related information from a list of surrounding network devices, and the related information may include but is not limited to at least one of the following: the first network device itself The ephemeris of each network device, the movement track 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 switch, the target network device it switches to can be selected from the a second network device.
  • the measurement indication information is used to instruct the a second network device to measure the first signal sent by the terminal.
  • the measurement indication information includes: first configuration information; and/or a first measurement activation instruction, where the first measurement activation instruction is used to trigger the a second network device to activate the measurement of the first signal.
  • the second network device can learn the time-frequency resource occupied by the sending of the first signal, and then detect the first signal on the corresponding time-frequency resource, thereby improving the detection efficiency.
  • the measurement indication information includes at least one of the following: 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 second network device starts to detect the first signal, and when the first signal is detected, measures the reception quality of the first signal.
  • the second network device may also start to detect the first signal after receiving the measurement instruction information.
  • Step 404 The second network device measures the first signal sent by the terminal according to the measurement instruction information 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.
  • the first measurement result refers to a result obtained by measuring the first signal by the second network device.
  • the first measurement results obtained may be the same or different.
  • the first measurement result may be the measurement value obtained by the second network device measuring the first signal, such as RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality, Reference Signal Received Quality), SINR ( Signal to Interference plus Noise Ratio, SNR (Signal to Noise Ratio), RSSI (Received Signal Strength Indication, received signal strength indication), etc.
  • the first measurement result can also be a result value used to characterize the quality of the wireless signal based on the above measurement value.
  • the quality of the wireless signal can be divided into two types: poor and excellent, the result value can be represented by 1 bit, such as 0 Poor, 1 means excellent.
  • the types of wireless signal quality can also be divided into more than two types, which are not limited in the embodiment of the present application.
  • the second network device After the second network device measures the first signal sent by the terminal and obtains the first measurement result, it can send the first measurement result to the first network device, so that the first network device can synthesize the first measurement sent by each second network device As a result, a decision is made as to whether the terminal is switched. Alternatively, the second network device may not send the first measurement result to the first network device, and the second network device may decide whether to switch the terminal. For the above two cases, different embodiments will be introduced below.
  • 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 or better than the terminal
  • the terminal can be switched from the first network device to the second network device, and the second network device provides services for the terminal to ensure the reliability of data transmission of the terminal.
  • the first signal sent by the terminal is measured through the network side, and the handover decision is made based on the measurement result of the first signal, which is very important for high transmission between the terminal and the network device.
  • the network side cannot obtain measurement results or obtain failed measurement results, thereby ensuring the reliability of handover, and the terminal can smoothly switch from a network device To another network device to ensure that there is always a network device serving the terminal on the network side, thereby ensuring the reliability of the terminal’s data transmission; on the other hand, the first signal sent by the terminal is measured through the network side.
  • the step of reporting the measurement result by the terminal is omitted, thereby reducing the handover delay and the signaling overhead of the air interface.
  • the first network device may decide whether to switch the terminal, or the second network device (that is, the candidate target network device) may decide whether to switch the terminal.
  • the first network device that is, the source network device
  • the second network device that is, the candidate target network device
  • FIG. 5 shows a flowchart of a handover control method provided by another embodiment of the present application.
  • the method can be applied to the network architecture shown in FIG. 1 to FIG. 3.
  • the method may include the following steps:
  • Step 501 The first network device sends first configuration information to the terminal.
  • Step 502 The terminal sends a first signal according to the first configuration information.
  • Step 503 The first network device sends measurement instruction information to a second network devices, where a is a positive integer.
  • This step 503 can be performed simultaneously with step 501, or can be performed after step 501, which is not limited in the embodiment of the present application.
  • steps 501 to 503 are the same as or similar to steps 401 to 403 in the embodiment of FIG. 4.
  • steps 501 to 503 are the same as or similar to steps 401 to 403 in the embodiment of FIG. 4.
  • Step 504 The first network device measures the first signal to obtain a second measurement result.
  • the second measurement result refers to a result obtained by measuring the first signal by the first network device.
  • the second measurement result may be a measurement value obtained by measuring the first signal by the first network device, such as RSRP, RSRQ, SINR, SNR, RSSI, etc.
  • the second measurement result can also be a result value used to characterize wireless signal quality obtained based on the above measurement value.
  • the wireless signal quality can be divided into three types: poor, normal, and excellent, and the result value can be represented by 2 bits. For example, 00 means bad, 01 means fair, and 10 means excellent.
  • Step 505 The second network device measures the first signal according to the measurement instruction information to obtain the first measurement result.
  • step 505 is the same as or similar to step 404 in the embodiment of FIG. 4.
  • step 404 in the embodiment of FIG. 4.
  • steps 404 please refer to the introduction and description in the embodiment of FIG. 4, which will not be repeated in this embodiment.
  • 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 integrates the first measurement results sent by each second network device to make a decision on whether to switch the terminal.
  • the first network device receives the first measurement result sent by b second network devices among the a second network devices, where b is a positive integer less than or equal to a. That is, after the first network device sends the measurement instruction information to a second network device, it may receive the first measurement result fed back by all the second network devices in the a second network device, or may receive the a first measurement result fed back by part of the second network device in the second network device.
  • 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 switching request message is used to request the terminal to be switched to the target second network device.
  • the target second network device may be the second network device among the above b second network devices.
  • the target second network device here is selected by the first network device from the above b second network devices.
  • the first network device chooses to send to the second network device whose first measurement result meets the second condition.
  • Handover request message the number of target second network devices may be one or more, that is, the first network device may only send a handover request message to one target second network device, or it may send handover request messages to multiple target second network devices. .
  • the above-mentioned first condition and second condition refer to pre-set conditions for deciding to switch, or conditions for switch to be determined through negotiation between network devices, or determined by at least part of the network devices (such as the source network device) in the related network devices The conditions for switching.
  • the second measurement result satisfies the first condition, it indicates that the quality of the wireless signal between the terminal and the first network device is poor, and it can be switched to another better network device.
  • the first measurement result sent by a certain second network device satisfies the second condition, it indicates that the quality of the wireless signal between the terminal and the second network device is better, and you can switch to the second network device to provide better Service.
  • the first condition includes but is not limited to any of the following:
  • the second measurement result is less than or equal to the first threshold
  • N is a positive integer.
  • the foregoing first threshold value refers to a threshold value related to a measurement result
  • the first duration refers to a threshold value related to a duration.
  • the first network device may perform at least one measurement on the first signal sent by the terminal to obtain at least one measurement result.
  • the foregoing first condition may be preset according to requirements, which is not limited in the embodiment of the present application.
  • the second condition includes but is not limited to any of the following:
  • the first measurement result is greater than or equal to the second threshold
  • M is a positive integer.
  • the aforementioned second threshold value refers to a threshold value related to the measurement result
  • 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 to obtain at least one measurement result.
  • the foregoing second condition may be preset according to requirements, which is not limited in the embodiment of the present application.
  • the first network device may also decide whether to switch the terminal only based on the first measurement result, that is, the second network device of the first network device may not be considered when making the switch decision. Measurement results. For example, when 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. In this case, the first network device can pay more attention to the continuity of handover, to ensure that the terminal can be handed over to a suitable cell to the greatest extent, and it is not necessary to perform measurement on the first signal, or to reduce the number of The measurement duration of a signal reduces the processing overhead of the first network device.
  • Step 508 The first network device receives the handover confirmation message sent by the target second network device.
  • the target second network device After the target second network device receives the handover request message sent by the first network device, it decides whether to allow the terminal to switch to the target second network device. If the terminal is allowed to switch to the target second network device, the target second network device A handover confirmation message may be sent to the first network device, where the handover confirmation message is used to indicate confirmation to switch the terminal to the target second network device.
  • the handover confirmation message may also be called a handover request response message.
  • the first network device After the first network device receives the handover confirmation message sent by a certain target second network device, it can learn that the target second network device allows the terminal to switch. At this time, the first network device can decide to change the terminal from the first network device. The network device switches to the target second network device.
  • the first network device may receive handover confirmation messages sent by multiple target second network devices, that is, there are multiple target second network devices that allow the terminal to switch, then the first network device can switch from the sending Among the multiple target second network devices of the confirmation message, select one determined as the target second network device to which the terminal is switched. For example, the first network device may select the target second network device corresponding to the handover confirmation message first received as the target second network device to which the terminal is switched; for another example, the first network device may select the wireless connection with the terminal The target second network device with the best signal quality is used as the target second network device to which the terminal switches to, or there may be other ways to select the target second network device to which the terminal switches to, which is not limited in this embodiment of the application.
  • the first network device may send The other unselected target second network devices send a switching cancel instruction, and the switching cancel instruction is used to instruct to cancel the switching of the terminal to the other unselected target second network devices.
  • Step 509 After determining to switch the terminal to the target second network device, the first network device sends a switching command to the terminal.
  • the switching command is used to instruct the terminal to switch from the first network device to the target second network device.
  • the terminal can execute the switching process of switching from the first network device to the target second network device.
  • the terminal may 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. After the terminal successfully establishes a connection with the target second network device, it can perform data transmission with the target second network device through the connection.
  • the handover command is a HO command message.
  • the handover command includes but is not limited to at least one of the following information: resources used for RACH (Random Access Channel), C-RNTI (Cell-Radio Network Temporary Identifier, cell radio network temporary identifier), The security algorithm of the target second network device, the system message of the target second network device, etc.
  • target second network device in this step refers to a target second network device selected by the first network device through the method described in step 508 above.
  • timing for the first network device to send the measurement indication information may include the following two situations:
  • the first network device only sends measurement instruction information to at least one second network device when a certain condition is met. For example, the first network device measures the first signal to obtain the second measurement result, and when the second measurement result satisfies the fourth condition, the first network device sends measurement instruction information to a second network device.
  • the fourth condition includes but is not limited to any one of the following:
  • the second measurement result is less than or equal to the fourth threshold
  • P is a positive integer.
  • the foregoing fourth threshold value refers to a threshold value related to a measurement result
  • the fourth duration refers to a threshold value related to a duration.
  • the first network device when the first network device detects that the wireless signal quality between it and the terminal is poor, the first network device sends measurement instruction information to the second network device, seeking to switch the terminal to a network device with better wireless signal quality .
  • the second network device may also send the first measurement result to the first network device after receiving the measurement feedback instruction sent by the first network device.
  • the first network device measures the first signal to obtain the second measurement result.
  • the second measurement result meets the third condition, the first network device sends a measurement feedback instruction to the second network device, and the measurement feedback instruction is used for Instruct the a second network device to send the first measurement result to the first network device.
  • the third condition includes but is not limited to any of the following:
  • the second measurement result is less than or equal to the third threshold
  • Q is a positive integer.
  • the foregoing third threshold value refers to a threshold value related to the measurement result
  • the third duration refers to a threshold value related to duration.
  • the first network device when the first network device detects that the wireless signal quality between it and the terminal is poor, the first network device requests the second network device to obtain the first measurement result, seeking to switch the terminal to a wireless signal with better quality.
  • Internet equipment when the first network device detects that the wireless signal quality between it and the terminal is poor, the first network device requests the second network device to obtain the first measurement result, seeking to switch the terminal to a wireless signal with better quality.
  • the second network device sending the first measurement result to the first network device may include the following situations:
  • the second network device Each time the second network device obtains the first measurement result, it sends the first measurement result to the first network device.
  • the second network device sends the first measurement result obtained last time to the first network device in real time.
  • the second network device processes the first measurement result obtained within a period of time (such as averaging) to obtain the processed first measurement result, and then sends the processed first measurement result to the first network device.
  • the second network device sends the first measurement result to the first network device when the first measurement result meets the fifth condition.
  • the fifth condition includes but is not limited to any of the following:
  • the first measurement result is greater than or equal to the fifth threshold
  • R is a positive integer.
  • the above-mentioned fifth threshold value refers to a threshold value related to the measurement result
  • the fifth duration refers to a threshold value related to duration.
  • the second network device when the second network device detects that the wireless signal quality between it and the terminal is relatively good, the second network device actively sends the first measurement result to the first network device, and when the second network device detects that it and the terminal When the quality of the wireless signal is not excellent, the second network device may not send the first measurement result to the first network device, thereby saving signaling overhead.
  • the second network device After receiving the measurement feedback instruction sent by the first network device, the second network device sends the first measurement result to the first network device.
  • the second network device After receiving the measurement feedback instruction sent by the first network device, the second network device sends the first measurement result to the first network device when the first measurement result meets the sixth condition.
  • the sixth condition includes but is not limited to any one of the following:
  • the first measurement result is greater than or equal to the sixth threshold
  • the duration of the first measurement result U consecutive times greater than or equal to the sixth threshold value is greater than or equal to six hours;
  • U is a positive integer.
  • the above-mentioned sixth threshold refers to a threshold related to the measurement result, and the sixth duration refers to a threshold related to duration.
  • the second network device may send the most recently obtained first measurement result to the first network device, or 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.
  • the period of time may be all or part of the period from when the second network device starts measuring the first signal to when the measurement feedback instruction is received.
  • the first network device (that is, the source network device) is implemented to make a decision on whether to switch the terminal.
  • FIG. 6 shows a flowchart of a handover control method provided by another embodiment of the present application.
  • the method can be applied to the network architecture shown in FIG. 1 to FIG. 3.
  • the method may 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 instruction information to a second network devices, where a is a positive integer.
  • This step 603 can be performed simultaneously with step 601, or can be performed after step 601, which is not limited in the embodiment of the present application.
  • steps 601-603 are the same as or similar to steps 401-403 in the embodiment of FIG. 4.
  • steps 401-403 in the embodiment of FIG. 4.
  • Step 604 The first network device measures the first signal to obtain a second measurement result.
  • the second measurement result refers to a result obtained by measuring the first signal by the first network device.
  • the second measurement result may be a measurement value obtained by measuring the first signal by the first network device, such as RSRP, RSRQ, SINR, SNR, RSSI, etc.
  • the second measurement result can also be a result value used to characterize the quality of the wireless signal based on the above measurement value.
  • the quality of the wireless signal can be divided into four types: poor, fair, good, and excellent, and the result value can be 2 bits Represents, such as 00 means bad, 01 means fair, 10 means good, and 11 means excellent.
  • Step 605 The second network device measures the first signal according to the measurement instruction information to obtain the first measurement result.
  • step 605 is the same as or similar to step 404 in the embodiment of FIG. 4.
  • step 404 in the embodiment of FIG. 4.
  • steps 404 please refer to the introduction and description in the embodiment of FIG. 4, which will not be repeated in this embodiment.
  • Step 606 The first network device sends the second measurement result to the above a second network device.
  • the first network device sends the second measurement result to the second network device, so that the second network device synthesizes the received second measurement result and the first measurement result obtained by itself to make a decision on whether to switch the terminal.
  • the first network device when the first network device receives the measurement result acquisition request sent by the second network device, the first network device sends the second measurement result to the second network device.
  • the second network device sends a measurement result acquisition request to the first network device, and the measurement result acquisition request is used to request the acquisition of the second measurement result.
  • the seventh condition includes but is not limited to any of the following:
  • the first measurement result is greater than or equal to the seventh threshold
  • S is a positive integer.
  • the above-mentioned seventh threshold refers to a threshold related to the measurement result
  • the seventh duration refers to a threshold related to duration.
  • the second network device when the second network device detects that the wireless signal quality between it and the terminal is relatively good, the second network device requests the first network device to obtain the second measurement result, so as to determine whether the terminal needs to be handed over. provide better service.
  • 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 Send the second measurement result to the second network device, thereby saving signaling overhead.
  • the first network device sends the second measurement result to the second network device.
  • the eighth condition includes but is not limited to any one of the following:
  • the second measurement result is less than or equal to the eighth threshold
  • T is a positive integer.
  • the above-mentioned eighth threshold refers to a threshold related to the measurement result
  • the eighth duration refers to a threshold related to duration.
  • the first network device when the first network device detects that the wireless signal quality between it and the terminal is poor, the first network device actively sends the second measurement result to the second network device to trigger the second network device to make a handover decision. Seeking to switch the terminal to a network device with better wireless signal quality.
  • the first network device when or after the second network device starts measuring the first signal, the first network device sends the second measurement result to the second network device.
  • the first network device may also send the second measurement result to the second network device every time the second measurement result is acquired, or at intervals of time.
  • the second measurement result sent by the first network device to the second network device may be the second measurement result obtained last time, or may be the second measurement result obtained within a period of time. Not limited.
  • 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 handover instruction information to the first network device.
  • the switching instruction information is used to instruct the terminal to switch to the second network device.
  • first condition and the second condition please refer to the embodiment of FIG. 5 above, which will not be repeated in this embodiment.
  • the second network device may also decide whether to switch the terminal only based on the first measurement result, that is, the second network device of the first network device may not be considered when making the switch decision. Measurement results. For example, when the first measurement result meets the second condition, the second network device sends handover instruction information to the first network device. In this case, the first network device may perform measurement on the first signal, or may not perform measurement on the first signal, and does not need to send the second measurement result to the second network device, which reduces the processing of the first network device. Overhead.
  • Step 608 After determining to switch the terminal to the target second network device, the first network device sends a switching command to the terminal.
  • the switching command is used to instruct the terminal to switch from the first network device to the target second network device.
  • the terminal can execute the switching process of switching from the first network device to the target second network device.
  • the terminal may 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. After the terminal successfully establishes a connection with the target second network device, it can perform data transmission with the target second network device through the connection.
  • the handover command is a HO command message.
  • the handover command includes but is not limited to at least one of the following information: resources used for RACH, C-RNTI, security algorithm of the target second network device, and system messages of the target second network device.
  • the first network device After the first network device receives the switching instruction information sent by a certain second network device, it can learn that the second network device allows the terminal to switch. At this time, the first network device can decide to remove the terminal from the first network device. Switch to the second network device.
  • the first network device may receive the switching instruction information sent by multiple second network devices, that is, there are multiple second network devices that allow the terminal to switch, then the first network device can send the switching instruction information from there.
  • one second network device is selected as the target second network device.
  • the first network device may select the second network device corresponding to the handover instruction information received first as the target second network device; for another example, the first network device may select the one with the best wireless signal quality between the terminal and the terminal.
  • the second network device is used as the target second network device, or there may be other ways to select the target second network device, which is not limited in the embodiment of the present application.
  • the first network device may send to other second network devices A switching cancellation instruction, where the switching cancellation instruction is used to instruct to cancel the switching of the terminal to the other second network device.
  • the aforementioned other second network device refers to a second network device other than the selected target second network device among the multiple second network devices that send the switching instruction information.
  • the second network device (that is, the candidate target network device) makes a decision on whether the terminal is switched, compared to whether the first network device (that is, the source network device) determines whether the terminal is switched or not.
  • the solution for switching decision-making, the solution provided in this embodiment helps to save the interactive waiting time of the first measurement result, and further reduces the delay of switching.
  • the first network device after the first network device determines to switch the terminal to the target second network device, the first network device sends a switching command (such as a HO command message) to the terminal to clearly indicate to the terminal Switch from the first network device to the target second network device.
  • a switching command such as a HO command message
  • the first network device may not send a switching command (such as a HO command message) to the terminal, and the network side uses the first network device and the target second network device.
  • a switching command such as a HO command message
  • the interaction between the network devices will switch the first network device that will serve the terminal to the target second network device, realizing the terminal's unaware switching.
  • the handover confirmation message is used to indicate confirmation to switch the terminal to the target second network device, after confirming that the target second network device satisfies the specified
  • the first network device does not send a switching command to the terminal, and the terminal is switched from the first network device to the target second network device. That is, when the terminal switches from the cell of the first network device to the cell of the target second network device, the terminal does not need to adjust the configuration or initiate a connection establishment request to the target second network device, that is, it can directly communicate with the target second network device. Data transmission between network devices.
  • the above specified conditions include but are not limited to at least one of the following:
  • the cell of the target second network device and the cell of the first network device belong to the same cell group and meet the first feature
  • a cell group can include one or more cells.
  • the terminal can be directly handed over from the cell of the first network device to the cell of the target second network device without notifying the terminal (that is, without sending a handover command to the terminal).
  • the first feature includes but is not limited to at least one of the following:
  • 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 beams of the cell of the target second network device and the cell of the first network device ) Different configurations;
  • 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 And so on
  • the cell of the target second network device and the cell of the first network device share wireless 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 wireless resources;
  • Timing advance TA
  • the timing advance (Timing advance, TA) corresponding to the cell of the target second network device and/or the timing advance corresponding to the cell of the first network device meet the condition.
  • 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 terminal and the first network device and/or the target second network device The TA difference between them is less than the threshold value, or the target second network device may obtain 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.
  • the configurations of the two cells can be the same or similar, so that there is no need to send an air interface handover command to the terminal to provide the terminal with Related information of the cell of the target second network device (such as information such as the security algorithm of the target second network device, the system message of the target second network device, etc.), the terminal does not need to change the relevant configuration to communicate with the target second network device,
  • the terminal can directly use the configuration when it accesses the first network device, so as to realize the terminal's unaware handover. In this case, although the terminal actually switches from the first network device to the target second network device, from the perspective of the terminal, it is considered to be communicating with the same network device.
  • the handover confirmation message sent by the target second network device does not carry resource allocation information, and the resource allocation information is used to indicate the resources allocated by the target second network device to the terminal;
  • the target second network device can implicitly inform the first network device in this way, without sending an air interface handover command to the terminal.
  • the terminal is switched from the first network device to the target second network device.
  • 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 the same as the resource configuration provided by the first network device 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 to the resource configuration provided by the first network device for the terminal.
  • the target second network device can also inform the first network device in this way that the terminal can be switched from the first network device to the target second network device without sending an air interface switching command to the terminal.
  • the target second network device may also notify the first network device in other ways without sending a switching command to the terminal, which is not limited in the embodiment of the present application.
  • the target second network device can 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 meet the first characteristics. If the target second network device detects the cell of the target second network device If the cell of the first network device belongs to the same cell group and satisfies the first feature, when the target second network device sends a handover confirmation message to the first network device, it can notify the first network device in the manner described above, Need to send a switch command to the terminal.
  • 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) process.
  • beam failure recovery beam failure recovery
  • the cells belonging to the same cell group can use the same security key when communicating with the terminal.
  • the security key used when the target second network device communicates with the terminal and the first network device communicates with the terminal
  • the security key used at the time can be the same.
  • the process can include the following steps:
  • Step 701 The first network device sends first configuration information to the terminal.
  • Step 702 The terminal sends a first signal according to the first configuration information.
  • Step 703 The first network device sends measurement instruction 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 instruction information to obtain the 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 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 second network device that meets the above specified conditions is preferentially selected, and the handover request message is sent.
  • Step 708 The first network device receives the handover confirmation message sent by the target second network device.
  • the first network device releases the context information of the terminal when it determines to switch the terminal to the target second network device and confirms 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, so that the terminal does not perceive handover.
  • Step 710 Perform data transmission between the terminal and the target second network device.
  • the second network device that is, the candidate target network device
  • the first network device may preferentially select the second network device belonging to the same cell group as itself as the target second network device. Or, you can select the second network device with the best channel quality as the target second network device, or you can select specific services that can support the terminal (such as high-priority services, GBR (Guaranteed Bit Rate, guaranteed bit rate) services) Etc.) as the target second network device. In the case that the selected target second network device satisfies the above specified conditions, the first network device does not need to send a handover command to the terminal, so that the terminal does not need to switch.
  • GBR Guard Bit Rate
  • the first network device may also send a switching notification to the target second network device, where the switching notification is used to inform the target second network device to provide services for the terminal, for example Send and receive data related to the terminal.
  • the first network device may not send a handover notification to the target second network device, which is not limited in the embodiment of the present application.
  • the network side does not need to send a handover command to the terminal to realize the handover of the terminal's serving cell, realize the terminal unaware handover, and help save signaling overhead.
  • the network side can also realize the handover of the serving cell of the terminal without sending a handover command to the terminal.
  • the method may include the following steps:
  • Step 801 The terminal sends the measurement result of the downlink reference signal to the first network device.
  • the first network device also refers to the network device that is currently connected to the terminal, and the first network device may also be referred to as the source network device.
  • the terminal can measure the downlink reference signal delivered by the network side according to the configuration of the network side (such as the first network device) to obtain the corresponding measurement result. In addition, the terminal sends the measurement result to the first network device when the measurement report condition is satisfied.
  • the measurement result of the downlink reference signal may be a measurement value obtained by the terminal measuring the downlink reference signal, such as RSRP, RSRQ, SINR, SNR, RSSI, etc.
  • the measurement result of the downlink reference signal can also be a result value used to characterize the quality of the wireless signal obtained based on the above measurement value.
  • the quality of the wireless signal can be divided into two types: poor and excellent, the result value can be represented by 1 bit, such as 0 means poor and 1 means excellent.
  • the types of wireless signal quality can also be divided into more than two types, which are not limited in the embodiment of the present application.
  • Step 802 The first network device sends a handover request message to at least one second network device according to the measurement result.
  • the second network device also refers to the candidate target network device, and the number of the second network device may be one or more.
  • the first network device may select a network device with better wireless signal quality with the terminal as the second network device according to the measurement result reported by the terminal.
  • the switching request message is used to request the terminal to be switched to the at least one second network device.
  • 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 the handover request message to the second network device, the first network device first determines whether the cell of the second network device and the cell of the first network device belong to the same cell group; if they belong to the same cell group, the first network The device sends or preferentially sends a handover request message to the second network device; otherwise, the first network device does not send a handover request message to the second network device, or lowers the priority of sending a handover request message to the second network device.
  • Step 803 The first network device receives the handover confirmation message sent by the target second network device among the at least one second network device.
  • the target second network device is one of the above-mentioned at least one second network device.
  • the second network device After the second network device receives the handover request message sent by the first network device, it decides whether to allow the terminal to switch to the second network device. If the terminal is allowed to switch to the second network device, the second network device can send to the first network device.
  • the network device sends a handover confirmation message, where the handover confirmation message is used to indicate confirmation to switch the terminal to the second network device.
  • the handover confirmation message may also be called a handover request response message.
  • the first network device After the first network device receives the handover confirmation message sent by a certain second network device, it can learn that the second network device allows the terminal to switch. At this time, the first network device can decide to remove the terminal from the first network device. Switch to the second network device.
  • the first network device when the target second network device meets the specified condition, the first network device does not need to send a switching command to the terminal to complete the switching of the terminal from the first network device to the target second network device. That is, when the terminal switches from the cell of the first network device to the cell of the target second network device, the terminal does not need to adjust the configuration or initiate a connection establishment request to the target second network device, that is, it can directly communicate with the target second network device. Data transmission between network devices.
  • the above specified conditions include at least one of the following:
  • the cell of the target second network device and the cell of the first network device belong to the same cell group and meet the first feature
  • the first feature includes but is not limited to at least one of the following:
  • the cell of the target second network device and the cell of the first network device share the same PCI, and the cell of the target second network device and the cell of the first network device have different beam configurations;
  • 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 And so on
  • the cell of the target second network device and the cell of the first network device share wireless 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 wireless resources;
  • 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.
  • 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 between the terminal and the first network device and/or the target second network device The difference is less than the threshold value, or the target second network device may obtain 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.
  • the configurations of the two cells can be the same or similar, so that there is no need to send an air interface handover command to the terminal to provide the terminal with Related information of the cell of the target second network device (such as information such as the security algorithm of the target second network device, the system message of the target second network device, etc.), the terminal does not need to change the relevant configuration to communicate with the target second network device,
  • the terminal can directly use the configuration when it accesses the first network device, so as to realize the terminal's unaware handover. In this case, although the terminal actually switches from the first network device to the target second network device, from the perspective of the terminal, it is considered to be communicating with the same network device.
  • the handover confirmation message sent by the target second network device does not carry resource allocation information, and the resource allocation information is used to indicate the resources allocated by the target second network device to the terminal;
  • the target second network device can implicitly inform the first network device in this way, without sending an air interface handover command to the terminal.
  • the terminal is switched from the first network device to the target second network device.
  • 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 the same as the resource configuration provided by the first network device 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 to the resource configuration provided by the first network device for the terminal.
  • the target second network device can also inform the first network device in this way that the terminal can be switched from the first network device to the target second network device without sending an air interface switching command to the terminal.
  • the target second network device may also notify the first network device in other ways without sending a handover command to the terminal, which is not limited in this embodiment of the application.
  • the target second network device can 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 meet the first characteristics. If the target second network device detects the cell of the target second network device If the cell of the first network device belongs to the same cell group and satisfies the first feature, when the target second network device sends a handover confirmation message to the first network device, it can notify the first network device in the manner described above, Need to send a switch command to the terminal.
  • the first network device releases the context information of the terminal when it determines to switch the terminal to the target second network device and confirms that the target second network device satisfies the specified condition. In this case, the first network device does not send a handover command to the terminal, so that the terminal does not perceive handover.
  • Step 805 Perform data transmission between the terminal and the target second network device.
  • 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) process.
  • beam failure recovery beam failure recovery
  • the cells belonging to the same cell group can use the same security key when communicating with the terminal.
  • the security key used when the target second network device communicates with the terminal and the first network device communicates with the terminal
  • the security key used at the time can be the same.
  • the first network device receives the handover confirmation message sent by at least two second network devices, the first network device selects a second network device from the at least two second network devices as the target second network device. 2. Network equipment.
  • the target second network device may be a second network device that belongs to the same cell group as the cell of the first network device, or the target second network device may be the second network device with the best channel quality in the cell, or the target The second network device may be a second network device capable of supporting a specific service of the terminal (such as a high priority service, a GBR service, etc.).
  • a specific service of the terminal such as a high priority service, a GBR service, etc.
  • the first network device sends a switching command (such as a HO command message) to the terminal, triggering the terminal to initiate a connection establishment request to the target second network device (such as random access request), request to establish a connection with the target second network device.
  • a switching command such as a HO command message
  • the first network device may also send a switching notification to the target second network device, where the switching notification is used to inform the target second network device to provide services for the terminal, for example Send and receive data related to the terminal.
  • the first network device may not send a handover notification to the target second network device, which is not limited in the embodiment of the present application.
  • the network side can also realize the handover of the terminal’s serving cell without sending a handover command to the terminal, thereby realizing the terminal No perception handover, and helps to save signaling overhead.
  • the technical solutions of the present application are introduced and explained mainly from the perspective of interaction between the first network device, the second network device, and the terminal.
  • the above-mentioned steps related to the first network device can be individually implemented as a handover control method on the first network device side;
  • the above-mentioned steps related to the second network device can be individually implemented as a handover control method on the second network device side;
  • the steps executed by the terminal can be individually implemented as a handover control method on the terminal side.
  • FIG. 9 shows a block diagram of a handover control device provided by an embodiment of the present application.
  • the device has the function of realizing the example of the method on the first network device side, and the function can be realized by hardware, or by hardware executing corresponding software.
  • the device may be the first network device introduced above, or may be set in the first network device.
  • the apparatus 900 may include: a configuration information sending module 910 and a measurement instruction sending module 920
  • the configuration information sending module 910 is configured to send first configuration information to the terminal, where the first configuration information is used to indicate the sending configuration of the first signal.
  • the measurement instruction sending module 920 is configured to send measurement instruction information to a second network device, where the measurement instruction information is used to instruct the a second network device to measure the first signal sent by the terminal, Obtain a first measurement result, where the first measurement result is used to decide whether to switch the network device connected to the terminal, and the a is a positive integer.
  • the first signal belongs to an uplink reference signal.
  • the measurement indication information includes: the first configuration information; and/or, a first measurement activation instruction, the first measurement activation instruction being used to trigger the activation of the a second network device Measurement of the first signal.
  • the measurement indication information includes at least one of the following: measurement start time of the first signal, measurement end time of the first signal, measurement duration of the first signal, and all The measurement period of the first signal.
  • the device 900 further includes:
  • An uplink signal measurement module configured to measure the first signal to obtain a second measurement result
  • a measurement result receiving module configured to receive the first measurement result sent by b second network devices among the a second network devices, where b is a positive integer less than or equal to a;
  • a handover request sending module configured to: when the second measurement result meets the first condition, and the first measurement result sent by the target second network device among the b second network devices meets the second condition, or When the first measurement result sent by the target second network device meets the second condition, send a handover request message to the target second network device, where the handover request message is used to request that the terminal Switch to the target second network device.
  • the first condition includes any one of the following: the second measurement result is less than or equal to a first threshold; the second measurement result is less than or equal to the first threshold for N consecutive times. Limit; the duration of the second measurement result being less than or equal to the first threshold value is greater than or equal to the first duration; and, the second measurement result is less than or equal to the first threshold value for N consecutive times The duration of is greater than or equal to the first duration; wherein, the N is a positive integer.
  • the second condition includes any one of the following: the first measurement result is greater than or equal to a second threshold; the first measurement result is greater than or equal to the second threshold for M consecutive times Limit; the duration of the first measurement result being greater than or equal to the second threshold value is greater than or equal to the second duration; and, the first measurement result is greater than or equal to the second threshold value for M consecutive times
  • the duration of is greater than or equal to the second duration; wherein, the M is a positive integer.
  • the apparatus 900 further includes: a feedback instruction sending module, configured to send a measurement feedback instruction to the a second network device when the second measurement result meets a third condition, the The measurement feedback instruction is used to instruct the a second network device to send the first measurement result to the first network device.
  • a feedback instruction sending module configured to send a measurement feedback instruction to the a second network device when the second measurement result meets a third condition, the The measurement feedback instruction is used to instruct the a second network device to send the first measurement result to the first network device.
  • the apparatus 900 further includes: an instruction information receiving module, configured to receive handover instruction information sent by b second network devices among the a second network devices, and the b second network devices The switching instruction information sent by the target second network device in the network device is used to instruct to switch the terminal to the target second network device, and the b is a positive integer less than or equal to the a.
  • the device 900 further includes:
  • An uplink signal measurement module configured to measure the first signal to obtain a second measurement result
  • the measurement result sending module is configured to send the second measurement result to the a second network device.
  • the device 900 further includes: a measurement instruction sending module, configured to send a measurement instruction to the device when the second measurement result obtained by the first network device on the first signal satisfies a fourth condition The a second network device sends the measurement instruction information.
  • a measurement instruction sending module configured to send a measurement instruction to the device when the second measurement result obtained by the first network device on the first signal satisfies a fourth condition The a second network device sends the measurement instruction information.
  • the apparatus 900 further includes: a switching command sending module, configured to send a switching command to the terminal, the switching command being used to instruct the terminal to switch from the first network device to the a The target second network device in the second network device.
  • a switching command sending module configured to send a switching command to the terminal, the switching command being used to instruct the terminal to switch from the first network device to the a The target second network device in the second network device.
  • the device 900 further includes:
  • a confirmation message receiving module configured to receive a handover confirmation message sent by a target second network device of the a second network equipment, where the handover confirmation message is used to confirm handover of the terminal to the target second network device ;
  • the designated condition confirmation module is configured to not send a switching command to the terminal when it is confirmed that the target second network device meets the designated condition.
  • the specified condition includes at least one of the following:
  • the cell of the target second network device and the cell of the first network device belong to the same cell group and meet the first feature
  • the handover confirmation message does not carry resource allocation information, and the resource allocation information is used to indicate the resources allocated by the target second network device to the terminal;
  • 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 first feature includes at least one of the following:
  • the cell of the target second network device and the cell of the first network device share the same physical cell identifier PCI, and the cell of the target second network device and the cell of the first network device have different beam configurations;
  • the cell of the target second network device and the cell of the first network device share the same virtual PCI, and when the terminal communicates with the target second network device and the first network device, use all The virtual PCI performs scrambling and decoding;
  • the cell of the target second network device and the cell of the first network device share radio resources; and,
  • the timing advance corresponding to the cell of the target second network device and/or the timing advance corresponding to the cell of the first network device satisfy a condition.
  • the first signal sent by the terminal is measured through the network side, and the handover decision is made based on the measurement result of the first signal, which is very important for high transmission between the terminal and the network device.
  • the network side cannot obtain measurement results or obtain failed measurement results, thereby ensuring the reliability of handover, and the terminal can smoothly switch from a network device To another network device to ensure that there is always a network device serving the terminal on the network side, which in turn ensures the reliability of the terminal’s data transmission; on the other hand, the first signal sent by the terminal is measured through the network side.
  • the step of reporting the measurement result by the terminal is omitted, thereby reducing the handover delay and the signaling overhead of the air interface.
  • FIG. 10 shows a block diagram of a handover control device provided by another embodiment of the present application.
  • the device has the function of realizing the above-mentioned method example on the second network device side, and the function can be realized by hardware, or by hardware executing corresponding software.
  • the device may be the second network device described above, or it may be set in the second network device.
  • the apparatus 1000 may include: a measurement instruction receiving module 1010 and an uplink signal measurement module 1020.
  • the measurement instruction receiving module 1010 is configured to receive measurement instruction information sent by the first network device.
  • the uplink signal measurement module 1020 is configured to measure the first signal sent by the terminal according to the measurement instruction information 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 .
  • the apparatus 1000 further includes: a measurement receiving and sending module, configured to send the first measurement result to the first network device.
  • the measurement receiving and sending module is configured to: each time the first measurement result is acquired, send the first measurement result to the first network device; or, for a period of time Process the first measurement result obtained in the computer to obtain the processed first measurement result, and send the processed first measurement result to the first network device; or, when the first measurement result satisfies the fifth When conditions are met, send the first measurement result to the first network device; or, after receiving a measurement feedback instruction sent by the first network device, send the first measurement result to the first network device Or, after receiving the measurement feedback instruction sent by the first network device, and when the first measurement result meets the sixth condition, send the first measurement result to the first network device.
  • the device 1000 further includes:
  • 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 the first network device measuring the first signal;
  • the handover instruction sending module is configured to send a notification to the office when the second measurement result meets the first condition and the first measurement result meets the second condition, or when the first measurement result meets the second condition
  • the first network device sends switching instruction information, where the switching instruction information is used to instruct to switch the terminal to the second network device.
  • the apparatus 1000 further includes: an acquisition request sending module, configured to send a measurement result acquisition request to the first network device when the first measurement result satisfies the seventh condition, and the measurement The result obtaining request is used to request obtaining the second measurement result.
  • an acquisition request sending module configured to send a measurement result acquisition request to the first network device when the first measurement result satisfies the seventh condition, and the measurement The result obtaining request is used to request obtaining the second measurement result.
  • the first signal sent by the terminal is measured through the network side, and the handover decision is made based on the measurement result of the first signal, which is very important for high transmission between the terminal and the network device.
  • the network side cannot obtain measurement results or obtain failed measurement results, thereby ensuring the reliability of handover, and the terminal can smoothly switch from a network device To another network device to ensure that there is always a network device serving the terminal on the network side, thereby ensuring the reliability of the terminal’s data transmission; on the other hand, the first signal sent by the terminal is measured through the network side.
  • the step of reporting the measurement result by the terminal is omitted, thereby reducing the handover delay and the signaling overhead of the air interface.
  • FIG. 11 shows a block diagram of a handover control device provided by another embodiment of the present application.
  • the device has the function of realizing the above-mentioned method example on the terminal side, and the function can be realized by hardware, or by hardware executing corresponding software.
  • the device can be the terminal described above, or it can be set in the terminal.
  • the apparatus 1100 may include: a configuration information receiving module 1110 and an uplink signal sending module 1120.
  • the configuration information receiving module 1110 is configured to receive first configuration information, where the first configuration information is used to indicate the sending configuration of the first signal.
  • the uplink signal sending module 1120 is configured to send the first signal according to the first configuration information; wherein the measurement result of the first signal is used for the network side to decide whether to switch the network device connected to the terminal.
  • the first signal sent by the terminal is measured through the network side, and the handover decision is made based on the measurement result of the first signal, which is very important for high transmission between the terminal and the network device.
  • the network side cannot obtain measurement results or obtain failed measurement results, thereby ensuring the reliability of handover, and the terminal can smoothly switch from a network device To another network device to ensure that there is always a network device serving the terminal on the network side, thereby ensuring the reliability of the terminal’s data transmission; on the other hand, the first signal sent by the terminal is measured through the network side.
  • the step of reporting the measurement result by the terminal is omitted, thereby reducing the handover delay and the signaling overhead of the air interface.
  • FIG. 12 shows a block diagram of a handover control device provided by another embodiment of the present application.
  • the device has the function of realizing the example of the method on the first network device side, and the function can be realized by hardware, or by hardware executing corresponding software.
  • the device may be the first network device introduced above, or may be set in the first network device.
  • the apparatus 1200 may include: a measurement result receiving module 1210, a handover request sending module 1220, a confirmation message receiving module 1230, and a designated condition confirming module 1240.
  • the measurement result receiving module 1210 is configured to receive the measurement result of the downlink reference signal sent by the terminal.
  • the handover request sending module 1220 is 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 switch 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 among the at least one second network device, where the handover confirmation message is used to confirm handover of the terminal to the target second network equipment.
  • the designated condition confirmation module 1240 is configured to not send a handover command to the terminal when it is confirmed that the target second network device satisfies the designated condition.
  • the specified condition includes at least one of the following:
  • the cell of the target second network device and the cell of the first network device belong to the same cell group and meet the first feature
  • the handover confirmation message does not carry resource allocation information, and the resource allocation information is used to indicate the resources allocated by the target second network device to the terminal;
  • 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 first feature includes at least one of the following:
  • the cell of the target second network device and the cell of the first network device share the same physical cell identifier PCI, and the cell of the target second network device and the cell of the first network device have different beam configurations;
  • the cell of the target second network device and the cell of the first network device share the same virtual PCI, and when the terminal communicates with the target second network device and the first network device, use all The virtual PCI performs scrambling and decoding;
  • the cell of the target second network device and the cell of the first network device share radio resources; and,
  • the timing advance corresponding to the cell of the target second network device and/or the timing advance corresponding to the cell of the first network device satisfy a condition.
  • the cell of the second network device and the cell of the first network device belong to the same cell group.
  • the apparatus 1200 further includes: a target device selection module, configured to: when the first network device receives a handover confirmation message sent by at least two second network devices, Selecting the target second network device among the 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.
  • the network side can also realize the handover of the terminal’s serving cell without sending a handover command to the terminal, thereby realizing the terminal No perception handover, and helps to save signaling overhead.
  • the device provided in the above embodiment realizes its functions, only the division of the above functional modules is used for illustration. In actual applications, the above functions can be allocated by different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.
  • FIG. 13 shows a schematic structural diagram of a network device 130 provided by an embodiment of the present application.
  • the network device 130 may be a satellite or a base station.
  • the network device 130 may include: a processor 131, a receiver 132, a transmitter 133, a memory 134, and a bus 135.
  • the processor 131 includes one or more processing cores, and the processor 131 executes various functional applications and information processing by running software programs and modules.
  • the receiver 132 and the transmitter 133 may be implemented as a communication component, and the communication component may be a communication chip.
  • the memory 134 is connected to the processor 131 through the bus 135.
  • the memory 134 may be used to store a computer program, and the processor 131 is used to execute the computer program to implement each step performed by the first network device in the foregoing method embodiment, or implement each step performed by the second network device in the foregoing method embodiment. step.
  • the memory 134 can be implemented by any type of volatile or non-volatile storage device or a combination thereof.
  • the volatile or non-volatile storage device includes, but is not limited to: magnetic or optical disk, electrically erasable and programmable Read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static anytime access memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM) .
  • FIG. 14 shows a schematic structural diagram of a terminal 140 provided by an embodiment of the present application.
  • the terminal 140 may include a processor 141, a receiver 142, a transmitter 143, a memory 144, and a 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 a communication component, and the communication component may be a communication chip.
  • the memory 144 is connected to the processor 141 through the bus 145.
  • the memory 144 may be used to store a computer program, and the processor 141 is used to execute the computer program to implement each step executed by the terminal in the foregoing method embodiment.
  • the memory 144 can be implemented by any type of volatile or non-volatile storage device or a combination thereof.
  • the volatile or non-volatile storage device includes, but is not limited to: magnetic or optical disk, electrically erasable and programmable Read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static anytime access memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM) .
  • An embodiment of the present 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 switching control method on the network device side.
  • An embodiment of the present 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 aforementioned switching control method on the terminal side.
  • This application also provides a computer program product, which when the computer program product runs on a computer, causes the computer to execute the above-mentioned switching control method on the network device side.
  • This application also provides a computer program product, which when the computer program product runs on a computer, causes the computer to execute the above-mentioned terminal-side switching control method.
  • Computer-readable media include computer storage media and communication media, where communication media includes any media that facilitates the transfer of computer programs from one place to another.
  • the storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

Abstract

一种切换控制方法、装置、设备及存储介质，属于通信技术领域。所述方法包括：第一网络设备向终端发送第一配置信息（401）；终端根据第一配置信息发送第一信号（402）；第一网络设备向a个第二网络设备发送测量指示信息，a为正整数（403）；第二网络设备根据测量指示信息，对终端发送的第一信号进行测量得到第一测量结果，该第一测量结果用于决策是否对终端连接的网络设备进行切换（404）。该方法一方面保证了切换和数据传输的可靠性，另一方面也降低了切换的时延和空口的信令开销。

Description

切换控制方法、装置、设备及存储介质 技术领域
本申请实施例涉及通信技术领域，特别涉及一种切换控制方法、装置、设备及存储介质。
背景技术
在移动通信系统中，由于终端的移动性，终端会在不同的服务小区之间进行切换，也即与不同的基站建立连接。
目前，蜂窝通信网络采用的切换方案如下：源基站为终端配置测量下行参考信号，终端会根据源基站的配置，对下行参考信号进行测量并上报；源基站基于终端上报的测量结果，向目标基站发送切换请求消息，该切换请求消息用于请求将终端从源基站切换至目标基站；在目标基站同意该切换请求消息之后，源基站向终端发送切换命令，该切换命令用于指示终端从源基站切换至目标基站；终端在接收到上述切换命令之后，与源基站断开连接，并向目标基站发起随机接入流程，实现与目标基站建立连接，从而完成从源基站到目标基站的切换。
对于NTN(Non Terrestrial Network，非地面通信网络)系统，一般采用卫星通信的方式向地面用户提供通信服务，终端与卫星之间的无线信号传输时延较大，且卫星相对地面具有快速移动的特性，若仍基于下行参考信号测量上报再决定是否执行切换，将导致基站对切换判断的有效性降低，影响切换性能。
发明内容
本申请实施例提供了一种切换控制方法、装置、设备及存储介质，可以用于解决上述技术问题。所述技术方案如下：
一方面，本申请实施例提供了一种切换控制方法，所述方法包括：
第一网络设备向终端发送第一配置信息，所述第一配置信息用于指示第一信号的发送配置；
所述第一网络设备向a个第二网络设备发送测量指示信息，所述测量指示信息用于指示所述a个第二网络设备对所述终端发送的所述第一信号进行测量，得到第一测量结果，所述第一测量结果用于决策是否对所述终端连接的网络设备进行切换，所述a为正整数。
另一方面，本申请实施例提供了一种切换控制方法，所述方法包括：
第二网络设备接收第一网络设备发送的测量指示信息；
所述第二网络设备根据所述测量指示信息，对终端发送的第一信号进行测量得到第一测量结果，所述第一测量结果用于决策是否对所述终端连接的网络设备进行切换。
另一方面，本申请实施例提供了一种切换控制方法，所述方法包括：
终端接收第一配置信息，所述第一配置信息用于指示第一信号的发送配置；
所述终端根据所述第一配置信息发送所述第一信号；
其中，所述第一信号的测量结果用于网络侧决策是否对所述终端连接的网络设备进行切换。
另一方面，本申请实施例提供了一种切换控制方法，所述方法包括：
第一网络设备接收终端发送的下行参考信号的测量结果；
所述第一网络设备根据所述测量结果，向至少一个第二网络设备发送切换请求消息，所述切换请求消息用于请求将所述终端切换至所述至少一个第二网络设备；
所述第一网络设备接收所述至少一个第二网络设备中的目标第二网络设备发送的切换确认消息，所述切换确认消息用于确认将所述终端切换至所述目标第二网络设备；
所述第一网络设备在确认所述目标第二网络设备满足指定条件的情况下，所述第一网络设备不向所述终端发送切换命令。
再一方面，本申请实施例提供了一种切换控制装置，应用于第一网络设备，所述装置包括：
配置信息发送模块，用于向终端发送第一配置信息，所述第一配置信息用于指示第一信号的发送配置；
测量指示发送模块，用于向a个第二网络设备发送测量指示信息，所述测量指示信息用于指示所述a个第二网络设备对所述终端发送的所述第一信号进行测量，得到第一测量结果，所述第一测量结果用于决策是否对所述终端连接的网络设备进行切换，所述a为正整数。
再一方面，本申请实施例提供了一种切换控制装置，应用于第二网络设备，所述装置包括：
测量指示接收模块，用于接收第一网络设备发送的测量指示信息；
上行信号测量模块，用于根据所述测量指示信息，对终端发送的第一信号进行测量得到第一测量结果，所述第一测量结果用于决策是否对所述终端连接的网络设备进行切换。
再一方面，本申请实施例提供了一种切换控制装置，应用于终端，所述装置包括：
配置信息接收模块，用于接收第一配置信息，所述第一配置信息用于指示第一信号的发送配置；
上行信号发送模块，用于根据所述第一配置信息发送所述第一信号；
其中，所述第一信号的测量结果用于网络侧决策是否对所述终端连接的网络设备进行切换。
再一方面，本申请实施例提供了一种切换控制装置，应用于第一网络设备，所述装置包括：
测量结果接收模块，用于接收终端发送的下行参考信号的测量结果；
切换请求发送模块，用于根据所述测量结果，向至少一个第二网络设备发送切换请求消息，所述切换请求消息用于请求将所述终端切换至所述至少一个第二网络设备；
确认消息接收模块，用于接收所述至少一个第二网络设备中的目标第二网络设备发送的切换确认消息，所述切换确认消息用于确认将所述终端切换至所述目标第二网络设备；
指定条件确认模块，用于在确认所述目标第二网络设备满足指定条件的情况下，不向所述终端发送切换命令。
还一方面，本申请实施例提供了一种网络设备，所述网络设备包括处理器和存储器，所述存储器存储有计算机程序，所述计算机程序用于被所述处理器执行，以实现上述第一网络设备侧的切换控制方法，和/或实现上述第二网络设备侧的切换控制方法。
还一方面，本申请实施例提供了一种终端，所述终端包括处理器和存储器，所述存储器存储有计算机程序，所述计算机程序用于被所述处理器执行，以实现上述终端侧的切换控制方法。
又一方面，本申请实施例提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于被处理器执行，以实现上述第一网络设备侧的切换控制方法，和/或实现上述第二网络设备侧的切换控制方法。
又一方面，本申请实施例提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于被处理器执行，以实现上述终端侧的切换控制方法。
本申请实施例提供的技术方案可以包括如下有益效果：
通过网络侧对终端发送的第一信号进行测量，并基于该第一信号的测量结果进行切换决策，对于终端和网络设备之间高传输时延或高移动性的场景，一方面，不会出现网络侧无法获取到测量结果或者获取到已经失效的测量结果的问题，从而保证了切换的可靠性，终端能 够顺利地从一个网络设备切换至另一个网络设备，确保网络侧始终有为终端服务的网络设备，进而也就保证了终端的数据传输的可靠性；另一方面，通过网络侧对终端发送的第一信号进行测量，这就省去了终端上报测量结果的步骤，从而降低了切换的时延，也降低了空口的信令开销。
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图1是本申请一个实施例提供的网络架构的示意图；
图2是本申请另一个实施例提供的网络架构的示意图；
图3是本申请另一个实施例提供的网络架构的示意图；
图4是本申请一个实施例提供的切换控制方法的流程图；
图5是本申请另一个实施例提供的切换控制方法的流程图；
图6是本申请另一个实施例提供的切换控制方法的流程图；
图7是本申请另一个实施例提供的切换控制方法的流程图；
图8是本申请另一个实施例提供的切换控制方法的流程图；
图9是本申请一个实施例提供的切换控制装置的框图；
图10是本申请另一个实施例提供的切换控制装置的框图；
图11是本申请另一个实施例提供的切换控制装置的框图；
图12是本申请另一个实施例提供的切换控制装置的框图；
图13是本申请一个实施例提供的网络设备的结构示意图；
图14是本申请一个实施例提供的终端的结构示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
本申请实施例描述的网络架构以及业务场景是为了更加清楚地说明本申请实施例的技术方案，并不构成对本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
请参考图1，其示出了本申请一个实施例提供的网络架构的示意图。该网络架构可以包括：网络设备10和终端20。
网络设备10是用于为终端20提供无线通信服务的设备。网络设备10与终端20之间可以通过空口建立连接，从而通过该连接进行通信，包括信令和数据的交互。网络设备10的数量可以有多个，两个邻近的网络设备10之间也可以通过有线或者无线的方式进行通信。终端20可以在不同的网络设备10之间进行切换，也即与不同的网络设备10建立连接。
在一个示例中，如图2所示，以NTN网络为例，NTN网络中的网络设备10可以是卫星11。一颗卫星11可以覆盖一定范围的地面区域，为该地面区域上的终端20提供无线通信服务。另外，卫星11可以围绕地球做轨道运动，通过布设多个卫星11，可以实现对地球表面的不同区域的通信覆盖。
相比于地面的蜂窝通信网络，卫星通信具有很多独特的优点。首先，卫星通信不受用户地域的限制，例如一般的陆地通信不能覆盖海洋、高山、沙漠等无法搭设通信设备或由于人口稀少而不做通信覆盖的区域，而对于卫星通信来说，由于一颗卫星即可以覆盖较大的地面，加之卫星可以围绕地球做轨道运动，因此理论上地球上每一个角落都可以被卫星通信覆盖。其次，卫星通信有较大的社会价值。卫星通信在边远山区、贫穷落后的国家或地区都可以以较低的成本覆盖到，从而使这些地区的人们享受到先进的语音通信和移动互联网技术，有利于缩小与发达地区的数字鸿沟，促进这些地区的发展。再次，卫星通信距离远，且通信距离 增大通讯的成本没有明显增加；最后，卫星通信的稳定性高，不受自然灾害的限制。
通信卫星按照轨道高度的不同分为LEO(Low-Earth Orbit，低地球轨道)卫星、MEO(Medium-Earth Orbit，中地球轨道)卫星、GEO(Geostationary Earth Orbit，地球同步轨道)卫星、HEO(High Elliptical Orbit，高椭圆轨道)卫星等等。目前阶段主要研究的是LEO和GEO。
1、LEO
低轨道卫星高度范围为500km～1500km，相应轨道周期约为1.5小时～2小时。用户间单跳通信的信号传播延迟一般小于20ms。最大卫星可视时间20分钟。信号传播距离短，链路损耗少，对用户终端的发射功率要求不高。
2、GEO
地球同步轨道卫星，轨道高度为35786km，围绕地球旋转周期为24小时。用户间单跳通信的信号传播延迟一般为250ms。
为了保证卫星的覆盖以及提升整个卫星通信系统的系统容量，卫星采用多波束覆盖地面，一颗卫星可以形成几十甚至数百个波束来覆盖地面；一个卫星波束可以覆盖直径几十至上百公里的地面区域。
在另一个示例中，如图3所示，以蜂窝通信网络为例，蜂窝通信网络中的网络设备10可以是基站12。基站12是一种部署在接入网中用以为终端20提供无线通信功能的装置。基站12可以包括各种形式的宏基站，微基站，中继站，接入点等等。在采用不同的无线接入技术的系统中，具备基站功能的设备的名称可能会有所不同，例如在5G NR(New Radio，新空口)系统中，称为gNodeB或者gNB。随着通信技术的演进，“基站”这一名称可能会变化。为方便描述，本申请实施例中，上述为终端20提供无线通信功能的装置统称为基站。
另外，本申请实施例中涉及的终端20，可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备，以及各种形式的用户设备(User Equipment，UE)，移动台(Mobile Station，MS)，终端设备(terminal device)等等。为方便描述，本申请实施例中，上面提到的设备统称为终端。
另外，在本申请实施例中，名词“网络”和“系统”通常混用，但本领域技术人员可以理解其含义。
本申请实施例描述的技术方案，可以适用于NTN系统，也可以适用于蜂窝网络系统。
以NTN系统为例，与蜂窝通信系统相比，NTN系统中终端与卫星之间的信号传播时延大幅增加，且存在卫星快速移动的问题，如果在NTN系统中直接沿用现有基于下行参考信号测量上报的切换机制，会存在以下几个方面的问题：
1、由于传输时延过大和卫星的快速移动，导致终端和网络之间需要执行频繁的切换过程，造成大量的切换信令开销，增加终端的功耗和工作量。比如当一个终端在地球上静止不动时，由于卫星相对地球来说的移动速度是极快的，这时即使终端相对地面不动，其相对卫星来说也在以极高的速度运动，而这种运动也就意味着终端相对于卫星来说具有极高的移动性(以卫星为参考物)。
2、如果沿用现有基于下行参考信号测量上报的切换机制，由于传输时延过大和卫星的快速移动(也即终端相对于卫星的快速移动)，再考虑到终端和卫星之间的通信距离较远，这样一来，在频繁切换的基础上还会叠加上过大的传输延迟问题，这种频繁切换且切换流程中同时存在的较大时延现象，很容易导致给终端的切换命令失效或者终端已经移出小区范围，导致切换失败或终端断网，而这将是非常严重的问题。
综合上述两方面问题，由于终端与卫星之间的无线信号传输时延较大，且卫星相对地面具有快速移动的特性，若仍基于下行参考信号测量上报再决定是否执行切换，将导致卫星对切换判断的有效性降低，影响切换性能。
另外，即便是蜂窝网络系统，当终端与基站之间的传输时延较大，或者终端与基站之间的相对运动速度较大时，如终端在快速移动的交通工具或飞行器上时，若仍基于下行参考信 号测量上报再决定是否执行切换，同样也会导致基站对切换判断的有效性降低，影响切换性能。
基于此，本申请实施例提供了一种切换控制方法、装置、设备及存储介质。在本申请实施例提供的技术方案中，采用上行移动性替代下行移动性，即通过终端发出上行参考信号给网络设备(如卫星或基站)，网络侧根据接收到的上行参考信号综合判断和决策如何服务该终端，例如是否需要更换服务该终端的网络设备。这样，一方面保证了切换和数据传输的可靠性，另一方面也降低了切换的时延和空口的信令开销。
具体来讲，对于上文介绍的高传输时延或高移动性场景，当终端与网络设备之间的传输时延较大，或者终端与网络设备之间的相对运动速度较大时，如果采用基于下行参考信号测量上报的切换机制，由于终端与源网络设备之间的传输时延较大或者相对运动速度较大，会出现终端无法向源网络设备成功上报其对下行参考信号的测量结果，或者终端上报的下行参考信号的测量结果被源网络设备接收时已经失效，从而导致终端无法成功进行切换，影响终端的正常通信。采用本申请实施例提供的技术方案，通过网络侧对终端发出的上行参考信号进行测量，并基于该测量结果进行切换决策，不会出现网络侧无法获取到上行参考信号的测量结果的问题，也不会出现网络侧获取到已经失效的测量结果的问题，从而保证了切换的可靠性，终端能够顺利地从一个网络设备切换至另一个网络设备，确保网络侧始终有为终端服务的网络设备，进而也就保证了终端的数据传输的可靠性。
另一方面，基于下行参考信号测量上报的切换机制，需要网络侧发送下行参考信号，终端对该下行参考信号进行测量，然后向网络侧上报该测量结果，在高传输时延的场景下，会导致切换时延较大。采用本申请实施例提供的技术方案，通过网络侧对终端发出的上行参考信号进行测量，这就省去了终端上报测量结果的步骤，从而降低了切换的时延，也降低了空口的信令开销。
另外，对于终端来说，在高移动性场景下(如在NTN网络中)，如果采用基于下行参考信号测量上报的切换机制，由于终端与网络设备之间是一个频繁切换的场景，这种频繁切换的场景需要终端频繁地进行测量和上报，这不仅对空口信令的需求较高，且还会造成终端功耗的增加，产生费电的问题。采用本申请实施例提供的技术方案，通过网络侧对终端发出的上行参考信号进行测量，这就不需要终端进行频繁的测量和上报，有利于节省终端的功耗和电量。
下面，将结合几个示例性实施例，对本申请技术方案进行介绍说明。
请参考图4，其示出了本申请一个实施例提供的切换控制方法的流程图，该方法可应用于图1至图3所示的网络架构中，该方法可以包括如下几个步骤：
步骤401，第一网络设备向终端发送第一配置信息。
第一网络设备是指当前与终端建立连接的网络设备，第一网络设备也可以称为源网络设备。
第一配置信息用于指示第一信号的发送配置，也即用于告知终端如何发送第一信号。例如，第一配置信息可以用于向终端指示发送第一信号的时频位置，还可以用于向终端指示周期性或非周期性地发送第一信号等等，本申请实施例对此不作限定。
可选地，第一信号属于上行参考信号。例如，第一信号可以是SRS(Sounding Reference Signal，探测参考信号)。
可选地，第一信号是终端专用(specific)的信号，例如第一网络设备可以通过专用信令向终端发送第一配置信息，如该专用信令可以是专用RRC(Radio Resource Control，无线资源控制)消息。
可选地，第一网络设备向终端发送测量配置信息，该测量配置信息中携带第一配置信息。测量配置信息是用于向终端提供测量配置的信息，如上行测量配置和/或下行测量配置，本申请实施例对此不作限定。
可选地，第一网络设备可以在终端初始接入时，向终端发送第一配置信息；或者，第一网络设备也可以在满足某种条件(如第一网络设备与终端之间的信号质量较差)时，向终端发送第一配置信息。
步骤402，终端根据第一配置信息发送第一信号。
终端在接收到第一配置信息之后，根据该第一配置信息发送第一信号。例如，终端根据该第一配置信息所配置的时频资源，占用该时频资源发送第一信号。可选地，终端还可以根据该第一配置信息，确定是周期性地发送第一信号，还是非周期性地发送第一信号，例如在满足某种条件的情况下发送第一信号。
可选地，第一网络设备还可以向终端发送第一发送激活指令，该第一发送激活指令用于触发终端发送第一信号。例如，终端在接收到第一网络设备发送的第一发送激活指令之后，开始发送第一信号。可选地，终端可以按照第一配置信息发送第一信号。
步骤403，第一网络设备向a个第二网络设备发送测量指示信息，a为正整数。
第二网络设备的数量可以是一个，也可以是多个。第二网络设备是除第一网络设备之外的其它网络设备，也即第二网络设备和第一网络设备并非同一网络设备。可选地，第二网络设备是第一网络设备邻近的网络设备，该邻近的网络设备可以是指距离小于某一阈值的网络设备，也可以是指信号质量大于某一阈值的网络设备，也可以是指覆盖区域相邻的网络设备，本申请实施例对此不作限定。在一个示例中，第一网络设备可以从其周围的网络设备列表中，根据相关信息确定出上述a个第二网络设备，该相关信息可以包括但不限于以下至少一项：第一网络设备自身的星历、各个网络设备的星历、终端的移动轨迹、各个网络设备的位置信息，等等。第二网络设备也可以称为候选目标网络设备，也即如果终端需要进行切换，其切换至的目标网络设备可以从该a个第二网络设备中选出。
测量指示信息用于指示上述a个第二网络设备对终端发送的第一信号进行测量。
可选地，测量指示信息包括：第一配置信息；和/或，第一测量激活指令，该第一测量激活指令用于触发上述a个第二网络设备激活对第一信号的测量。第二网络设备在获取到第一配置信息之后，便可以获知该发送第一信号所占用的时频资源，然后在相应的时频资源上对第一信号进行检测，从而提高检测效率。
可选地，测量指示信息包括以下至少一项：第一信号的测量开始时刻、第一信号的测量结束时刻、第一信号的测量持续时长、以及第一信号的测量周期。例如，当第一信号的测量开始时刻到达时，第二网络设备开始对第一信号进行检测，并在检测到该第一信号时，对该第一信号的接收质量进行测量。或者，第二网络设备也可以在接收到测量指示信息之后，即开始对第一信号进行检测。
步骤404，第二网络设备根据测量指示信息，对终端发送的第一信号进行测量得到第一测量结果，该第一测量结果用于决策是否对终端连接的网络设备进行切换。
第一测量结果是指第二网络设备对第一信号进行测量得到的结果。对于不同的第二网络设备，其得到的第一测量结果可能相同，也可能不同。第一测量结果可以是第二网络设备对第一信号进行测量得到的测量值，如RSRP(Reference Signal Received Power，参考信号接收功率)、RSRQ(Reference Signal Received Quality，参考信号接收质量)、SINR(Signal to Interference plus Noise Ratio，信号干扰噪声比)、SNR(Signal to Noise Ratio，信噪比)、RSSI(Received Signal Strength Indication，接收信号强度指示)等。第一测量结果也可以是基于上述测量值得到的一个用于表征无线信号质量的结果值，如无线信号质量可以分为差和优两种，则该结果值可以用1比特表示，如0表示差，1表示优。当然无线信号质量的种类也可以划分成不止两种，本申请实施例对此不作限定。
第二网络设备对终端发送的第一信号进行测量得到第一测量结果之后，可以将该第一测量结果发送给第一网络设备，以便第一网络设备综合各个第二网络设备发送的第一测量结果，对终端是否切换进行决策。或者，第二网络设备也可以不发送第一测量结果给第一网络设备，由第二网络设备对终端是否切换进行决策。对于上述这两种情况，将在下文通过不同的实施 例进行介绍说明。
由于第一测量结果反映了终端与第二网络设备之间的无线信号质量，当终端与某个第二网络设备之间的无线信号质量较佳时，例如大于某一门限值或优于终端与第一网络设备之间的无线信号质量时，可以将终端从第一网络设备切换至该第二网络设备，由该第二网络设备为终端提供服务，确保终端的数据传输的可靠性。
综上所述，本申请实施例提供的技术方案中，通过网络侧对终端发送的第一信号进行测量，并基于该第一信号的测量结果进行切换决策，对于终端和网络设备之间高传输时延或高移动性的场景，一方面，不会出现网络侧无法获取到测量结果或者获取到已经失效的测量结果的问题，从而保证了切换的可靠性，终端能够顺利地从一个网络设备切换至另一个网络设备，确保网络侧始终有为终端服务的网络设备，进而也就保证了终端的数据传输的可靠性；另一方面，通过网络侧对终端发送的第一信号进行测量，这就省去了终端上报测量结果的步骤，从而降低了切换的时延，也降低了空口的信令开销。
在上文实施例中已经介绍，可以由第一网络设备(也即源网络设备)对终端是否切换进行决策，也可以由第二网络设备(也即候选目标网络设备)对终端是否切换进行决策。下面，将通过图5和图6这两个实施例，分别对上述这两种情况进行介绍说明。在图5所示的实施例中，主要介绍上述第一种情况，第一网络设备(也即源网络设备)对终端是否切换进行决策；在图6所示的实施例中，主要介绍上述第二种情况，第二网络设备(也即候选目标网络设备)对终端是否切换进行决策。
请参考图5，其示出了本申请另一个实施例提供的切换控制方法的流程图，该方法可应用于图1至图3所示的网络架构中，该方法可以包括如下几个步骤：
步骤501，第一网络设备向终端发送第一配置信息。
步骤502，终端根据第一配置信息发送第一信号。
步骤503，第一网络设备向a个第二网络设备发送测量指示信息，a为正整数。
该步骤503可以和步骤501同时执行，也可以在步骤501之后执行，本申请实施例对此不作限定。
另外，上述步骤501-503与图4实施例中的步骤401-403相同或类似，具体可参见图4实施例中的介绍说明，本实施例对此不再赘述。
步骤504，第一网络设备对第一信号进行测量，得到第二测量结果。
第二测量结果是指第一网络设备对第一信号进行测量得到的结果。第二测量结果可以是第一网络设备对第一信号进行测量得到的测量值，如RSRP、RSRQ、SINR、SNR、RSSI等。第二测量结果也可以是基于上述测量值得到的一个用于表征无线信号质量的结果值，如无线信号质量可以分为差、一般、优共3种，则该结果值可以用2比特表示，如00表示差，01表示一般，10表示优。
步骤505，第二网络设备根据测量指示信息，对第一信号进行测量得到第一测量结果。
上述步骤505与图4实施例中的步骤404相同或类似，具体可参见图4实施例中的介绍说明，本实施例对此不再赘述。
步骤506，第二网络设备向第一网络设备发送第一测量结果。
第二网络设备可以将第一测量结果发送给第一网络设备，以便第一网络设备综合各个第二网络设备发送的第一测量结果，对终端是否切换进行决策。
相应地，第一网络设备接收a个第二网络设备中的b个第二网络设备发送的第一测量结果，b为小于或等于a的正整数。也即，第一网络设备在向a个第二网络设备发送测量指示信息之后，可能接收到该a个第二网络设备中的全部第二网络设备反馈的第一测量结果，也可能接收到该a个第二网络设备中的部分第二网络设备反馈的第一测量结果。
步骤507，当第二测量结果满足第一条件，且目标第二网络设备发送的第一测量结果满 足第二条件时，第一网络设备向目标第二网络设备发送切换请求消息。
切换请求消息用于请求将终端切换至目标第二网络设备。目标第二网络设备可以是上述b个第二网络设备中的第二网络设备。
需要说明的是，这里的目标第二网络设备，由第一网络设备从上述b个第二网络设备中选取，例如第一网络设备选择向第一测量结果满足第二条件的第二网络设备发送切换请求消息。另外，目标第二网络设备的数量可以是一个或多个，也即第一网络设备可以仅向一个目标第二网络设备发送切换请求消息，也可以向多个目标第二网络设备发送切换请求消息。
上述第一条件和第二条件是指预先设定的决定进行切换的条件，或者网络设备间协商确定的进行切换的条件，或者相关网络设备中的至少部分的网络设备(如源网络设备)确定的进行切换的条件。当第二测量结果满足第一条件时，说明终端与第一网络设备之间的无线信号质量较差，可以切换至更优的另一网络设备。当某个第二网络设备发送的第一测量结果满足第二条件时，说明终端与该第二网络设备之间的无线信号质量较优，可以切换至该第二网络设备，以为终端提供更好的服务。
可选地，第一条件包括但不限于以下任意一项：
(1)第二测量结果小于或等于第一门限值；
(2)第二测量结果连续N次小于或等于第一门限值；
(3)第二测量结果小于或等于第一门限值的持续时长大于或等于第一时长；以及，
(4)第二测量结果连续N次小于或等于第一门限值的持续时长大于或等于第一时长；
其中，N为正整数。另外，上述第一门限值是指与测量结果相关的门限值，第一时长是指与时长相关的门限值。
第一网络设备可以对终端发送的第一信号进行至少一次测量，得到至少一次测量结果。上述第一条件可以根据需求预先设定，本申请实施例对此不作限定。
可选地，第二条件包括但不限于以下任意一项：
(1)第一测量结果大于或等于第二门限值；
(2)第一测量结果连续M次大于或等于第二门限值；
(3)第一测量结果大于或等于第二门限值的持续时长大于或等于第二时长；以及，
(4)第一测量结果连续M次大于或等于第二门限值的持续时长大于或等于第二时长；
其中，M为正整数。另外，上述第二门限值是指与测量结果相关的门限值，第二时长是指与时长相关的门限值。
每个第二网络设备也可以对终端发送的第一信号进行至少一次测量，得到至少一次测量结果。上述第二条件可以根据需求预先设定，本申请实施例对此不作限定。
需要说明的是，在一些可能的实施例中，第一网络设备也可以仅根据第一测量结果，对终端是否切换进行决策，也即在进行切换决策时可以不考虑第一网络设备的第二测量结果。例如，当目标第二网络设备发送的第一测量结果满足第二条件时，第一网络设备向目标第二网络设备发送切换请求消息。这种情况下，第一网络设备可以更看重切换的连续性，最大程度保证终端可以切换到合适的小区，也可以不执行针对第一信号的测量，或者尽可能地减少第一网络设备对第一信号的测量时长，降低第一网络设备的处理开销。
步骤508，第一网络设备接收目标第二网络设备发送的切换确认消息。
目标第二网络设备在接收到第一网络设备发送的切换请求消息之后，决定是否允许终端切换至该目标第二网络设备，如果允许终端切换至该目标第二网络设备，则目标第二网络设备可以向第一网络设备发送切换确认消息，该切换确认消息用于指示确认将终端切换至目标第二网络设备。切换确认消息也可以称为切换请求应答消息。
第一网络设备在接收到某个目标第二网络设备发送的切换确认消息之后，即可以获知该目标第二网络设备允许终端进行切换，此时第一网络设备就可以决定将该终端从第一网络设备切换至该目标第二网络设备。
另外，考虑到第一网络设备有可能接收到多个目标第二网络设备发送的切换确认消息， 也即存在多个目标第二网络设备允许终端进行切换，那么第一网络设备可以从该发送切换确认消息的多个目标第二网络设备中，选择一个确定为终端切换至的目标第二网络设备。例如，第一网络设备可以选择最先接收到的切换确认消息对应的目标第二网络设备，作为终端切换至的目标第二网络设备；又例如，第一网络设备可以选择与终端之间的无线信号质量最优的目标第二网络设备，作为终端切换至的目标第二网络设备，或者还可以有其它方式选择终端切换至的目标第二网络设备，本申请实施例对此不作限定。
可选地，当第一网络设备从该发送切换确认消息的多个目标第二网络设备中，选择一个目标第二网络设备作为终端切换至的目标第二网络设备之后，第一网络设备可以向其他未被选择的目标第二网络设备发送切换取消指令，该切换取消指令用于指示取消将终端切换至该其他未被选择的目标第二网络设备。
步骤509，在确定将终端切换至目标第二网络设备之后，第一网络设备向终端发送切换命令。
切换命令用于指示终端从第一网络设备切换至目标第二网络设备。终端在接收到该切换命令之后，即可以执行从第一网络设备切换至目标第二网络设备的切换流程。可选地，终端在接收到切换命令之后，可以向目标第二网络设备发起连接建立请求(如随机接入请求)，请求与目标第二网络设备建立连接。终端在和目标第二网络设备成功建立连接之后，就可以通过该连接，与目标第二网络设备之间进行数据传输。
可选地，切换命令为HO command消息。
可选地，切换命令包括但不限于以下至少一项信息：用于RACH(Random Access Channel，随机接入信道)的资源、C-RNTI(Cell-Radio Network Temporary Identifier，小区无线网络临时标识)、目标第二网络设备的安全算法、目标第二网络设备的系统消息等。
需要说明的是，本步骤中的目标第二网络设备是指第一网络设备通过上文步骤508中介绍的方式，选择出的一个目标第二网络设备。
另外，第一网络设备发送测量指示信息的时机，可以包括如下两种情况：
1、配置即发送。也即，只要第一网络设备给终端配置了发送第一信号，如向终端发送了第一配置信息，则第一网络设备就向至少一个第二网络设备发送测量指示信息。
2、满足条件再发送。也即，第一网络设备在满足某种条件的情况下，才向至少一个第二网络设备发送测量指示信息。例如，第一网络设备对第一信号进行测量得到第二测量结果，当该第二测量结果满足第四条件时，第一网络设备向a个第二网络设备发送测量指示信息。
可选地，第四条件包括但不限于以下任意一项：
(1)第二测量结果小于或等于第四门限值；
(2)第二测量结果连续P次小于或等于第四门限值；
(3)第二测量结果小于或等于第四门限值的持续时长大于或等于第四时长；以及，
(4)第二测量结果连续P次小于或等于第四门限值的持续时长大于或等于第四时长；
其中，P为正整数。另外，上述第四门限值是指与测量结果相关的门限值，第四时长是指与时长相关的门限值。
也即，当第一网络设备检测发现其与终端之间的无线信号质量较差时，第一网络设备向第二网络设备发送测量指示信息，寻求将终端切换至无线信号质量更优的网络设备。
在示例性实施例中，第二网络设备还可以在接收到第一网络设备发送的测量反馈指令之后，才向第一网络设备发送第一测量结果。例如，第一网络设备对第一信号进行测量得到第二测量结果，当该第二测量结果满足第三条件时，第一网络设备向第二网络设备发送测量反馈指令，该测量反馈指令用于指示上述a个第二网络设备将第一测量结果发送给第一网络设备。可选地，第三条件包括但不限于以下任意一项：
(1)第二测量结果小于或等于第三门限值；
(2)第二测量结果连续Q次小于或等于第三门限值；
(3)第二测量结果小于或等于第三门限值的持续时长大于或等于第三时长；以及，
(4)第二测量结果连续Q次小于或等于第三门限值的持续时长大于或等于第三时长；
其中，Q为正整数。另外，上述第三门限值是指与测量结果相关的门限值，第三时长是指与时长相关的门限值。
也即，当第一网络设备检测发现其与终端之间的无线信号质量较差时，第一网络设备向第二网络设备请求获取第一测量结果，寻求将终端切换至无线信号质量更优的网络设备。
在示例性实施例中，第二网络设备向第一网络设备发送第一测量结果，可以包括如下几种情形：
1、第二网络设备每获取到一次第一测量结果，则将该第一测量结果发送给第一网络设备。
也即，第二网络设备实时地向第一网络设备发送最近一次获取的第一测量结果。
2、第二网络设备将一段时间内获取的第一测量结果进行处理(如求平均)，得到处理后的第一测量结果，然后将处理后的第一测量结果发送给第一网络设备。
3、第二网络设备在第一测量结果满足第五条件时，向第一网络设备发送第一测量结果。
可选地，第五条件包括但不限于以下任意一项：
(1)第一测量结果大于或等于第五门限值；
(2)第一测量结果连续R次大于或等于第五门限值；
(3)第一测量结果大于或等于第五门限值的持续时长大于或等于第五时长；以及，
(4)第一测量结果连续R次大于或等于第五门限值的持续时长大于或等于第五时长；
其中，R为正整数。另外，上述第五门限值是指与测量结果相关的门限值，第五时长是指与时长相关的门限值。
也即，当第二网络设备检测发现其与终端之间的无线信号质量较优时，第二网络设备主动向第一网络设备发送第一测量结果，而当第二网络设备检测发现其与终端之间的无线信号质量并不优秀时，第二网络设备可以不向第一网络设备发送第一测量结果，从而节省信令开销。
4、第二网络设备在接收到第一网络设备发送的测量反馈指令之后，向第一网络设备发送第一测量结果。
5、第二网络设备在接收到第一网络设备发送的测量反馈指令之后，且在第一测量结果满足第六条件时，向第一网络设备发送第一测量结果。
可选地，第六条件包括但不限于以下任意一项：
(1)第一测量结果大于或等于第六门限值；
(2)第一测量结果连续U次大于或等于第六门限值；
(3)第一测量结果大于或等于第六门限值的持续时长大于或等于第六时长；以及，
(4)第一测量结果连续U次大于或等于第六门限值的持续时长大于或等于六时长；
其中，U为正整数。另外，上述第六门限值是指与测量结果相关的门限值，第六时长是指与时长相关的门限值。
可选地，第二网络设备在接收到测量反馈指令之后，可以将最近一次获得的第一测量结果发送给第一网络设备，也可以将一段时间内获得的第一测量结果发送给第一网络设备，或者将处理后的第一测量结果(对一段时间内获得的第一测量结果进行处理后得到)发送给第一网络设备。例如，该一段时间可以是从第二网络设备开始对第一信号进行测量，到接收到测量反馈指令之时的这一时间段的全部或部分时段。
综上所述，在本实施例中，实现了第一网络设备(也即源网络设备)对终端是否切换进行决策。
请参考图6，其示出了本申请另一个实施例提供的切换控制方法的流程图，该方法可应用于图1至图3所示的网络架构中，该方法可以包括如下几个步骤：
步骤601，第一网络设备向终端发送第一配置信息。
步骤602，终端根据第一配置信息发送第一信号。
步骤603，第一网络设备向a个第二网络设备发送测量指示信息，a为正整数。
该步骤603可以和步骤601同时执行，也可以在步骤601之后执行，本申请实施例对此不作限定。
另外，上述步骤601-603与图4实施例中的步骤401-403相同或类似，具体可参见图4实施例中的介绍说明，本实施例对此不再赘述。
步骤604，第一网络设备对第一信号进行测量，得到第二测量结果。
第二测量结果是指第一网络设备对第一信号进行测量得到的结果。第二测量结果可以是第一网络设备对第一信号进行测量得到的测量值，如RSRP、RSRQ、SINR、SNR、RSSI等。第二测量结果也可以是基于上述测量值得到的一个用于表征无线信号质量的结果值，如无线信号质量可以分为差、一般、良好、优共4种，则该结果值可以用2比特表示，如00表示差，01表示一般，10表示良好，11表示优秀。
步骤605，第二网络设备根据测量指示信息，对第一信号进行测量得到第一测量结果。
上述步骤605与图4实施例中的步骤404相同或类似，具体可参见图4实施例中的介绍说明，本实施例对此不再赘述。
步骤606，第一网络设备向上述a个第二网络设备发送第二测量结果。
第一网络设备将第二测量结果发送给第二网络设备，以便第二网络设备综合接收到的第二测量结果以及自身获取的第一测量结果，对终端是否切换进行决策。
可选地，当第一网络设备接收到第二网络设备发送的测量结果获取请求时，第一网络设备向第二网络设备发送第二测量结果。当第一测量结果满足第七条件时，第二网络设备向第一网络设备发送测量结果获取请求，该测量结果获取请求用于请求获取第二测量结果。
可选地，第七条件包括但不限于以下任意一项：
(1)第一测量结果大于或等于第七门限值；
(2)第一测量结果连续S次大于或等于第七门限值；
(3)第一测量结果大于或等于第七门限值的持续时长大于或等于第七时长；以及，
(4)第一测量结果连续S次大于或等于第七门限值的持续时长大于或等于第七时长；
其中，S为正整数。另外，上述第七门限值是指与测量结果相关的门限值，第七时长是指与时长相关的门限值。
也即，当第二网络设备检测发现其与终端之间的无线信号质量较优时，第二网络设备向第一网络设备请求获取第二测量结果，以此决策终端是否需要进行切换，以为终端提供更好的服务。而当第二网络设备检测发现其与终端之间的无线信号质量并不优秀时，第二网络设备可以不向第一网络设备请求获取第二测量结果，相应地第一网络设备也就不需要向第二网络设备发送第二测量结果，从而节省信令开销。
可选地，当第二测量结果满足第八条件时，第一网络设备向第二网络设备发送第二测量结果。
可选地，第八条件包括但不限于以下任意一项：
(1)第二测量结果小于或等于第八门限值；
(2)第二测量结果连续T次小于或等于第八门限值；
(3)第二测量结果小于或等于第八门限值的持续时长大于或等于第八时长；以及，
(4)第二测量结果连续T次小于或等于第八门限值的持续时长大于或等于第八时长；
其中，T为正整数。另外，上述第八门限值是指与测量结果相关的门限值，第八时长是指与时长相关的门限值。
也即，当第一网络设备检测发现其与终端之间的无线信号质量较差时，第一网络设备主动向第二网络设备发送第二测量结果，以此触发第二网络设备进行切换决策，寻求将终端切换至无线信号质量更优的网络设备。
可选地，在第二网络设备开始对第一信号执行测量之时或之后，第一网络设备向第二网络设备发送第二测量结果。当然，在一些其它实施例中，第一网络设备也可以在每获取到一 次第二测量结果时，或每间隔一段时间，就将该第二测量结果发送给第二网络设备。可选地，第一网络设备向第二网络设备发送的第二测量结果，可以是最近一次获得的第二测量结果，也可以是一段时间内获得的第二测量结果，本申请实施例对此不作限定。
步骤607，当第二测量结果满足第一条件，且第一测量结果满足第二条件时，第二网络设备向第一网络设备发送切换指示信息。
切换指示信息用于指示将终端切换至第二网络设备。有关第一条件和第二条件的介绍说明，可参见上文图5实施例，本实施例对此不再赘述。
需要说明的是，在一些可能的实施例中，第二网络设备也可以仅根据第一测量结果，对终端是否切换进行决策，也即在进行切换决策时可以不考虑第一网络设备的第二测量结果。例如，当第一测量结果满足第二条件时，第二网络设备向第一网络设备发送切换指示信息。这种情况下，第一网络设备可以执行对第一信号的测量，也可以不执行针对第一信号的测量，也不需要向第二网络设备发送第二测量结果，降低第一网络设备的处理开销。
步骤608，在确定将终端切换至目标第二网络设备之后，第一网络设备向终端发送切换命令。
切换命令用于指示终端从第一网络设备切换至目标第二网络设备。终端在接收到该切换命令之后，即可以执行从第一网络设备切换至目标第二网络设备的切换流程。可选地，终端在接收到切换命令之后，可以向目标第二网络设备发起连接建立请求(如随机接入请求)，请求与目标第二网络设备建立连接。终端在和目标第二网络设备成功建立连接之后，就可以通过该连接，与目标第二网络设备之间进行数据传输。
可选地，切换命令为HO command消息。
可选地，切换命令包括但不限于以下至少一项信息：用于RACH的资源、C-RNTI、目标第二网络设备的安全算法、目标第二网络设备的系统消息等。
第一网络设备在接收到某个第二网络设备发送的切换指示信息之后，即可以获知该第二网络设备允许终端进行切换，此时第一网络设备就可以决定将该终端从第一网络设备切换至该第二网络设备。
另外，考虑到第一网络设备有可能接收到多个第二网络设备发送的切换指示信息，也即存在多个第二网络设备允许终端进行切换，那么第一网络设备可以从该发送切换指示信息的多个第二网络设备中，选择一个第二网络设备作为目标第二网络设备。例如，第一网络设备可以选择最先接收到的切换指示信息对应的第二网络设备，作为目标第二网络设备；又例如，第一网络设备可以选择与终端之间的无线信号质量最优的第二网络设备，作为目标第二网络设备，或者还可以有其它方式选择目标第二网络设备，本申请实施例对此不作限定。
可选地，当第一网络设备从该发送切换指示信息的多个第二网络设备中，选择一个第二网络设备作为目标第二网络设备之后，第一网络设备可以向其他第二网络设备发送切换取消指令，该切换取消指令用于指示取消将终端切换至该其他第二网络设备。其中，上述其他第二网络设备是指该发送切换指示信息的多个第二网络设备中，除选择的目标第二网络设备之外的第二网络设备。
综上所述，在本实施例中，实现了第二网络设备(也即候选目标网络设备)对终端是否切换进行决策，相较于由第一网络设备(也即源网络设备)对终端是否切换进行决策的方案，本实施例提供的方案有助于节省第一测量结果的交互等待时间，进一步降低切换的时延。
在上文介绍的几个实施例中，第一网络设备在确定将终端切换至目标第二网络设备之后，第一网络设备会向终端发送切换命令(如HO command消息)，向终端明确地指示从第一网络设备切换至目标第二网络设备。
在示例性实施例中，第一网络设备在确定将终端切换至目标第二网络设备之后，也可以不向终端发送切换命令(如HO command消息)，网络侧通过第一网络设备和目标第二网络设备之间的交互，将为终端服务的第一网络设备切换为目标第二网络设备，实现终端无感知的 切换。
可选地，第一网络设备在接收到目标第二网络设备发送的切换确认消息之后，该切换确认消息用于指示确认将终端切换至目标第二网络设备，在确认目标第二网络设备满足指定条件的情况下，第一网络设备不向终端发送切换命令，完成将终端从第一网络设备切换至目标第二网络设备。也即，当终端从第一网络设备的小区切换至目标第二网络设备的小区时，终端不需要调整配置，也不需要向目标第二网络设备发起连接建立请求，即可以直接与目标第二网络设备之间进行数据传输。
可选地，上述指定条件包括但不限于以下至少一项：
1、目标第二网络设备的小区和第一网络设备的小区属于同一小区组且满足第一特征；
一个小区组中可以包括一个或多个小区，当目标第二网络设备的小区和第一网络设备的小区属于同一小区组且满足第一特征时，说明这两个小区的配置可以相同或类似，在这种情况下，可以在不告知终端的情况下(也即不向终端发送切换命令的情况下)，直接将终端从第一网络设备的小区，切换至目标第二网络设备的小区。
示例性地，第一特征包括但不限于以下至少一项：
(1)目标第二网络设备的小区和第一网络设备的小区共用同一个PCI(Physical Cell Identifier，物理小区标识)，且目标第二网络设备的小区和第一网络设备的小区的波束(beam)配置不同；
(2)目标第二网络设备的小区和第一网络设备的小区共用同一个虚拟PCI，且终端在与目标第二网络设备和第一网络设备进行通信时，使用该虚拟PCI进行加扰和解码等操作；
(3)目标第二网络设备的小区和第一网络设备的小区共享无线资源；例如，目标第二网络设备的小区和第一网络设备的小区被分配使用相同的无线资源；
(4)目标第二网络设备的小区对应的时间提前量(Timing advance，TA)和/或第一网络设备的小区对应的时间提前量满足条件。例如，目标第二网络设备和第一网络设备属于同一个TAG(Timing advance group)，或者目标第二网络设备的小区的TA为0，或者终端与第一网络设备和/或目标第二网络设备之间的TA差小于门限值，或者目标第二网络设备可以获取第一网络设备的TA，或者目标第二网络设备可以基于第一网络设备的TA进行TA调整，等等。
当目标第二网络设备的小区和第一网络设备的小区满足上述第一特征时，说明这两个小区的配置可以相同或类似，这样就不需要向终端发送空口的切换命令，来向终端提供目标第二网络设备的小区的相关信息(如目标第二网络设备的安全算法、目标第二网络设备的系统消息等信息)，终端也不需要更改相关配置才能和目标第二网络设备进行通信，终端直接沿用接入第一网络设备时的配置即可，从而实现终端无感知的切换。在这种情况下，终端虽然实际上是从第一网络设备切换至了目标第二网络设备，但从终端的角度，其认为是在和同一个网络设备进行通信。
2、目标第二网络设备发送的切换确认消息中不携带资源分配信息，该资源分配信息用于指示目标第二网络设备为终端分配的资源；
如果目标第二网络设备发送的切换确认消息中不携带资源分配信息，目标第二网络设备可以通过这种方式，隐式地告知第一网络设备，不需要向终端发送空口的切换命令，即可完成将终端从第一网络设备切换至目标第二网络设备。
3、目标第二网络设备发送的切换确认消息指示目标第二网络设备为终端提供的资源配置与第一网络设备为终端提供的资源配置相同。也即，目标第二网络设备发送的切换确认消息指示目标第二网络设备为终端提供的资源配置相比于第一网络设备为终端提供的资源配置无更改。
目标第二网络设备也可以通过这种方式，告知第一网络设备，不需要向终端发送空口的切换命令，即可完成将终端从第一网络设备切换至目标第二网络设备。
当然，目标第二网络设备还可以采用其它方式告知第一网络设备，不需要向终端发送切 换命令，本申请实施例对此不作限定。另外，目标第二网络设备可以检测目标第二网络设备的小区和第一网络设备的小区是否属于同一小区组且是否满足第一特征，如果目标第二网络设备检测发现目标第二网络设备的小区和第一网络设备的小区属于同一小区组且满足第一特征，则目标第二网络设备在向第一网络设备发送切换确认消息时，可以通过上文介绍的方式，告知第一网络设备，不需要向终端发送切换命令。
另外，终端可以基于波束失败恢复(beam failure recovery)过程，选择与目标第二网络设备的小区之间进行传输的波束。
另外，属于同一个小区组的小区，在与终端进行通信时，可以使用同一个安全密钥。例如，当目标第二网络设备的小区和第一网络设备的小区属于同一个小区组时，目标第二网络设备与终端进行通信时所使用的安全密钥，和第一网络设备与终端进行通信时所使用的安全密钥，可以相同。
结合参考图7，以第一网络设备(也即源网络设备)对终端是否切换进行决策为例，在不发送切换命令的情况下，完成终端从第一网络设备至目标第二网络设备的切换，该过程可以包括如下几个步骤：
步骤701，第一网络设备向终端发送第一配置信息。
步骤702，终端根据第一配置信息发送第一信号。
步骤703，第一网络设备向a个第二网络设备发送测量指示信息，a为正整数。
步骤704，第一网络设备对第一信号进行测量，得到第二测量结果。
步骤705，第二网络设备根据测量指示信息，对第一信号进行测量得到第一测量结果。
步骤706，第二网络设备向第一网络设备发送第一测量结果。
步骤707，当第二测量结果满足第一条件，且目标第二网络设备发送的第一测量结果满足第二条件时，第一网络设备向目标第二网络设备发送切换请求消息。可选地，优先选择满足上述指定条件的第二网络设备，发送切换请求消息。
步骤708，第一网络设备接收目标第二网络设备发送的切换确认消息。
步骤709，第一网络设备在确定将终端切换至目标第二网络设备，且在确认该目标第二网络设备满足指定条件的情况下，释放终端的上下文信息。在这种情况下，第一网络设备不向终端发送切换命令，实现终端无感知的切换。
步骤710，终端与目标第二网络设备之间进行数据传输。
当然，在其它示例中，对于第二网络设备(也即候选目标网络设备)对终端是否切换进行决策的情形，也可以在不发送切换命令的情况下，完成终端从第一网络设备至目标第二网络设备的切换。
需要说明的是，如果第一网络设备接收到多个第二网络设备发送的切换确认消息，第一网络设备可以优先选择与自身属于同一个小区组的第二网络设备作为目标第二网络设备，或者，也可以选择信道质量最优的第二网络设备作为目标第二网络设备，或者，也可以选择能够支持终端的特定业务(如高优先级业务、GBR(Guaranteed Bit Rate，保证比特速率)业务等)的第二网络设备作为目标第二网络设备。在该选择的目标第二网络设备满足上述指定条件的情况下，第一网络设备无需向终端发送切换命令，实现终端无感知的切换。
可选地，第一网络设备在确定将终端切换至目标第二网络设备之后，还可以向目标第二网络设备发送切换通知，该切换通知用于告知目标第二网络设备为终端提供服务，例如收发与终端相关的数据。当然，在其它示例中，第一网络设备也可以不向目标第二网络设备发送切换通知，本申请实施例对此不作限定。
综上所述，在本实施例中，网络侧无需向终端发送切换命令，实现对终端的服务小区的切换，实现了终端无感知的切换，且有助于节省信令开销。
对于基于下行参考信号测量上报的切换方案，网络侧也可以实现在不向终端发送切换命令的情况下，实现对终端的服务小区的切换。如图8所示，该方法可以包括如下几个步骤：
步骤801，终端向第一网络设备发送下行参考信号的测量结果。
在本实施例中，第一网络设备同样是指当前与终端建立连接的网络设备，第一网络设备也可以称为源网络设备。
终端可以根据网络侧(如第一网络设备)的配置，对网络侧下发的下行参考信号进行测量，得到相应的测量结果。并且，终端在满足测量上报条件时，向第一网络设备发送测量结果。
下行参考信号的测量结果可以是终端对下行参考信号进行测量得到的测量值，如RSRP、RSRQ、SINR、SNR、RSSI等。下行参考信号的测量结果也可以是基于上述测量值得到的一个用于表征无线信号质量的结果值，如无线信号质量可以分为差和优两种，则该结果值可以用1比特表示，如0表示差，1表示优。当然无线信号质量的种类也可以划分成不止两种，本申请实施例对此不作限定。
步骤802，第一网络设备根据测量结果，向至少一个第二网络设备发送切换请求消息。
在本实施例中，第二网络设备同样是指候选目标网络设备，第二网络设备的数量可以是一个，也可以是多个。例如，第一网络设备可以根据终端上报的测量结果，选择与终端之间的无线信号质量较优的网络设备，作为第二网络设备。
切换请求消息用于请求将终端切换至上述至少一个第二网络设备。
可选地，第二网络设备的小区与第一网络设备的小区，属于同一小区组。也即，第一网络设备在向第二网络设备发送切换请求消息之前，先确定该第二网络设备的小区和第一网络设备的小区是否属于同一小区组；如果属于同一小区组，第一网络设备向该第二网络设备发送或优先发送切换请求消息；否则，第一网络设备不向该第二网络设备发送切换请求消息，或者将向该第二网络设备发送切换请求消息的优先级降低。
步骤803，第一网络设备接收上述至少一个第二网络设备中的目标第二网络设备发送的切换确认消息。
目标第二网络设备是上述至少一个第二网络设备中的一个第二网络设备。
第二网络设备在接收到第一网络设备发送的切换请求消息之后，决定是否允许终端切换至该第二网络设备，如果允许终端切换至该第二网络设备，则第二网络设备可以向第一网络设备发送切换确认消息，该切换确认消息用于指示确认将终端切换至第二网络设备。切换确认消息也可以称为切换请求应答消息。
第一网络设备在接收到某个第二网络设备发送的切换确认消息之后，即可以获知该第二网络设备允许终端进行切换，此时第一网络设备就可以决定将该终端从第一网络设备切换至该第二网络设备。
在本实施例中，在目标第二网络设备满足指定条件的情况下，第一网络设备无需向终端发送切换命令，完成将终端从第一网络设备切换至目标第二网络设备。也即，当终端从第一网络设备的小区切换至目标第二网络设备的小区时，终端不需要调整配置，也不需要向目标第二网络设备发起连接建立请求，即可以直接与目标第二网络设备之间进行数据传输。
可选地，上述指定条件包括以下至少一项：
1、目标第二网络设备的小区和第一网络设备的小区属于同一小区组且满足第一特征；
示例性地，第一特征包括但不限于以下至少一项：
(1)目标第二网络设备的小区和第一网络设备的小区共用同一个PCI，且目标第二网络设备的小区和第一网络设备的小区的波束配置不同；
(2)目标第二网络设备的小区和第一网络设备的小区共用同一个虚拟PCI，且终端在与目标第二网络设备和第一网络设备进行通信时，使用该虚拟PCI进行加扰和解码等操作；
(3)目标第二网络设备的小区和第一网络设备的小区共享无线资源；例如，目标第二网络设备的小区和第一网络设备的小区被分配使用相同的无线资源；
(4)目标第二网络设备的小区对应的时间提前量和/或第一网络设备的小区对应的时间提前量满足条件。例如，目标第二网络设备和第一网络设备属于同一个TAG，或者目标第二 网络设备的服务小区的TA为0，或者终端与第一网络设备和/或目标第二网络设备之间的TA差小于门限值，或者目标第二网络设备可以获取第一网络设备的TA，或者目标第二网络设备可以基于第一网络设备的TA进行TA调整，等等。
当目标第二网络设备的小区和第一网络设备的小区满足上述第一特征时，说明这两个小区的配置可以相同或类似，这样就不需要向终端发送空口的切换命令，来向终端提供目标第二网络设备的小区的相关信息(如目标第二网络设备的安全算法、目标第二网络设备的系统消息等信息)，终端也不需要更改相关配置才能和目标第二网络设备进行通信，终端直接沿用接入第一网络设备时的配置即可，从而实现终端无感知的切换。在这种情况下，终端虽然实际上是从第一网络设备切换至了目标第二网络设备，但从终端的角度，其认为是在和同一个网络设备进行通信。
2、目标第二网络设备发送的切换确认消息中不携带资源分配信息，该资源分配信息用于指示目标第二网络设备为终端分配的资源；
如果目标第二网络设备发送的切换确认消息中不携带资源分配信息，目标第二网络设备可以通过这种方式，隐式地告知第一网络设备，不需要向终端发送空口的切换命令，即可完成将终端从第一网络设备切换至目标第二网络设备。
3、目标第二网络设备发送的切换确认消息指示目标第二网络设备为终端提供的资源配置与第一网络设备为终端提供的资源配置相同。也即，目标第二网络设备发送的切换确认消息指示目标第二网络设备为终端提供的资源配置相比于第一网络设备为终端提供的资源配置无更改。
目标第二网络设备也可以通过这种方式，告知第一网络设备，不需要向终端发送空口的切换命令，即可完成将终端从第一网络设备切换至目标第二网络设备。
当然，目标第二网络设备还可以采用其它方式告知第一网络设备，不需要向终端发送切换命令，本申请实施例对此不作限定。另外，目标第二网络设备可以检测目标第二网络设备的小区和第一网络设备的小区是否属于同一小区组且是否满足第一特征，如果目标第二网络设备检测发现目标第二网络设备的小区和第一网络设备的小区属于同一小区组且满足第一特征，则目标第二网络设备在向第一网络设备发送切换确认消息时，可以通过上文介绍的方式，告知第一网络设备，不需要向终端发送切换命令。
步骤804，第一网络设备在确定将终端切换至目标第二网络设备，且在确认该目标第二网络设备满足指定条件的情况下，释放终端的上下文信息。在这种情况下，第一网络设备不向终端发送切换命令，实现终端无感知的切换。
步骤805，终端与目标第二网络设备之间进行数据传输。
另外，终端可以基于波束失败恢复(beam failure recovery)过程，选择与目标第二网络设备的小区之间进行传输的波束。
另外，属于同一个小区组的小区，在与终端进行通信时，可以使用同一个安全密钥。例如，当目标第二网络设备的小区和第一网络设备的小区属于同一个小区组时，目标第二网络设备与终端进行通信时所使用的安全密钥，和第一网络设备与终端进行通信时所使用的安全密钥，可以相同。
需要说明的是，如果第一网络设备接收到至少两个第二网络设备发送的切换确认消息，则第一网络设备从该至少两个第二网络设备中选择一个第二网络设备，作为目标第二网络设备。
例如，目标第二网络设备可以是与第一网络设备的小区属于同一小区组的第二网络设备，或者，目标第二网络设备可以是小区内信道质量最优的第二网络设备，或者，目标第二网络设备可以是能够支持终端的特定业务(如高优先级业务、GBR业务等)的第二网络设备。在该选择的目标第二网络设备满足上述指定条件的情况下，第一网络设备无需向终端发送切换命令，实现终端无感知的切换。
另外，如果第一网络设备选择的目标第二网络设备不满足上述指定条件，则第一网络设 备向终端发送切换命令(如HO command消息)，触发终端向目标第二网络设备发起连接建立请求(如随机接入请求)，请求与目标第二网络设备建立连接。
可选地，第一网络设备在确定将终端切换至目标第二网络设备之后，还可以向目标第二网络设备发送切换通知，该切换通知用于告知目标第二网络设备为终端提供服务，例如收发与终端相关的数据。当然，在其它示例中，第一网络设备也可以不向目标第二网络设备发送切换通知，本申请实施例对此不作限定。
综上所述，在本实施例中，对于基于下行参考信号测量上报的切换方案，网络侧也可以实现在不向终端发送切换命令的情况下，实现对终端的服务小区的切换，实现了终端无感知的切换，且有助于节省信令开销。
需要说明的是，在上述方法实施例中，主要从第一网络设备、第二网络设备和终端之间交互的角度，对本申请技术方案进行了介绍说明。上述有关第一网络设备执行的步骤，可以单独实现成为第一网络设备侧的切换控制方法；上述有关第二网络设备执行的步骤，可以单独实现成为第二网络设备侧的切换控制方法；上述有关终端执行的步骤，可以单独实现成为终端侧的切换控制方法。
下述为本申请装置实施例，可以用于执行本申请方法实施例。对于本申请装置实施例中未披露的细节，请参照本申请方法实施例。
请参考图9，其示出了本申请一个实施例提供的切换控制装置的框图。该装置具有实现上述第一网络设备侧的方法示例的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该装置可以是上文介绍的第一网络设备，也可以设置在第一网络设备中。如图9所示，该装置900可以包括：配置信息发送模块910和测量指示发送模块920
配置信息发送模块910，用于向终端发送第一配置信息，所述第一配置信息用于指示第一信号的发送配置。
测量指示发送模块920，用于向a个第二网络设备发送测量指示信息，所述测量指示信息用于指示所述a个第二网络设备对所述终端发送的所述第一信号进行测量，得到第一测量结果，所述第一测量结果用于决策是否对所述终端连接的网络设备进行切换，所述a为正整数。
在示例性实施例中，所述第一信号属于上行参考信号。
在示例性实施例中，所述测量指示信息包括：所述第一配置信息；和/或，第一测量激活指令，所述第一测量激活指令用于触发所述a个第二网络设备激活对所述第一信号的测量。
在示例性实施例中，所述测量指示信息包括以下至少一项：所述第一信号的测量开始时刻、所述第一信号的测量结束时刻、所述第一信号的测量持续时长、以及所述第一信号的测量周期。
在示例性实施例中，所述装置900还包括：
上行信号测量模块，用于对所述第一信号进行测量，得到第二测量结果；
测量结果接收模块，用于接收所述a个第二网络设备中的b个第二网络设备发送的所述第一测量结果，所述b为小于或等于所述a的正整数；
切换请求发送模块，用于当所述第二测量结果满足第一条件，且所述b个第二网络设备中的目标第二网络设备发送的所述第一测量结果满足第二条件时，或者，当所述目标第二网络设备发送的所述第一测量结果满足所述第二条件时，向所述目标第二网络设备发送切换请求消息，所述切换请求消息用于请求将所述终端切换至所述目标第二网络设备。
在示例性实施例中，所述第一条件包括以下任意一项：所述第二测量结果小于或等于第一门限值；所述第二测量结果连续N次小于或等于所述第一门限值；所述第二测量结果小于或等于所述第一门限值的持续时长大于或等于第一时长；以及，所述第二测量结果连续N次小于或等于所述第一门限值的持续时长大于或等于所述第一时长；其中，所述N为正整数。
在示例性实施例中，所述第二条件包括以下任意一项：所述第一测量结果大于或等于第二门限值；所述第一测量结果连续M次大于或等于所述第二门限值；所述第一测量结果大于或等于所述第二门限值的持续时长大于或等于第二时长；以及，所述第一测量结果连续M次大于或等于所述第二门限值的持续时长大于或等于所述第二时长；其中，所述M为正整数。
在示例性实施例中，所述装置900还包括：反馈指令发送模块，用于当所述第二测量结果满足第三条件时，向所述a个第二网络设备发送测量反馈指令，所述测量反馈指令用于指示所述a个第二网络设备将所述第一测量结果发送给所述第一网络设备。
在示例性实施例中，所述装置900还包括：指示信息接收模块，用于接收所述a个第二网络设备中的b个第二网络设备发送的切换指示信息，所述b个第二网络设备中的目标第二网络设备发送的切换指示信息用于指示将所述终端切换至所述目标第二网络设备，所述b为小于或等于所述a的正整数。
在示例性实施例中，所述装置900还包括：
上行信号测量模块，用于对所述第一信号进行测量，得到第二测量结果；
测量结果发送模块，用于向所述a个第二网络设备发送所述第二测量结果。
在示例性实施例中，所述装置900还包括：测量指示发送模块，用于当所述第一网络设备对所述第一信号进行测量得到的第二测量结果满足第四条件时，向所述a个第二网络设备发送所述测量指示信息。
在示例性实施例中，所述装置900还包括：切换命令发送模块，用于向所述终端发送切换命令，所述切换命令用于指示所述终端从所述第一网络设备切换至所述a个第二网络设备中的目标第二网络设备。
在示例性实施例中，所述装置900还包括：
确认消息接收模块，用于接收所述a个第二网络设备中的目标第二网络设备发送的切换确认消息，所述切换确认消息用于确认将所述终端切换至所述目标第二网络设备；
指定条件确认模块，用于在确认所述目标第二网络设备满足指定条件的情况下，不向所述终端发送切换命令。
在示例性实施例中，所述指定条件包括以下至少一项：
所述目标第二网络设备的小区和所述第一网络设备的小区属于同一小区组且满足第一特征；
所述切换确认消息中不携带资源分配信息，所述资源分配信息用于指示所述目标第二网络设备为所述终端分配的资源；以及，
所述切换确认消息指示所述目标第二网络设备为所述终端提供的资源配置与所述第一网络设备为所述终端提供的资源配置相同。
在示例性实施例中，所述第一特征包括以下至少一项：
所述目标第二网络设备的小区和所述第一网络设备的小区共用同一个物理小区标识PCI，且所述目标第二网络设备的小区和所述第一网络设备的小区的波束配置不同；
所述目标第二网络设备的小区和所述第一网络设备的小区共用同一个虚拟PCI，且所述终端在与所述目标第二网络设备和所述第一网络设备进行通信时，使用所述虚拟PCI进行加扰和解码；
所述目标第二网络设备的小区和所述第一网络设备的小区共享无线资源；以及，
所述目标第二网络设备的小区对应的时间提前量和/或所述第一网络设备的小区对应的时间提前量满足条件。
综上所述，本申请实施例提供的技术方案中，通过网络侧对终端发送的第一信号进行测量，并基于该第一信号的测量结果进行切换决策，对于终端和网络设备之间高传输时延或高移动性的场景，一方面，不会出现网络侧无法获取到测量结果或者获取到已经失效的测量结果的问题，从而保证了切换的可靠性，终端能够顺利地从一个网络设备切换至另一个网络设备，确保网络侧始终有为终端服务的网络设备，进而也就保证了终端的数据传输的可靠性； 另一方面，通过网络侧对终端发送的第一信号进行测量，这就省去了终端上报测量结果的步骤，从而降低了切换的时延，也降低了空口的信令开销。
请参考图10，其示出了本申请另一个实施例提供的切换控制装置的框图。该装置具有实现上述第二网络设备侧的方法示例的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该装置可以是上文介绍的第二网络设备，也可以设置在第二网络设备中。如图10所示，该装置1000可以包括：测量指示接收模块1010和上行信号测量模块1020。
测量指示接收模块1010，用于接收第一网络设备发送的测量指示信息。
上行信号测量模块1020，用于根据所述测量指示信息，对终端发送的第一信号进行测量得到第一测量结果，所述第一测量结果用于决策是否对所述终端连接的网络设备进行切换。
在示例性实施例中，所述装置1000还包括：测量接收发送模块，用于向所述第一网络设备发送所述第一测量结果。
在示例性实施例中，所述测量接收发送模块，用于：每获取到一次所述第一测量结果，则将所述第一测量结果发送给所述第一网络设备；或者，将一段时间内获取的第一测量结果进行处理，得到处理后的第一测量结果，将所述处理后的第一测量结果发送给所述第一网络设备；或者，在所述第一测量结果满足第五条件时，向所述第一网络设备发送所述第一测量结果；或者，在接收到所述第一网络设备发送的测量反馈指令之后，向所述第一网络设备发送所述第一测量结果；或者，在接收到所述第一网络设备发送的测量反馈指令之后，且在所述第一测量结果满足第六条件时，向所述第一网络设备发送所述第一测量结果。
在示例性实施例中，所述装置1000还包括：
测量结果接收模块，用于接收所述第一网络设备发送的第二测量结果，所述第二测量结果是所述第一网络设备对所述第一信号进行测量得到的结果；
切换指示发送模块，用于当所述第二测量结果满足第一条件且所述第一测量结果满足第二条件时，或者，当所述第一测量结果满足所述第二条件时，向所述第一网络设备发送切换指示信息，所述切换指示信息用于指示将所述终端切换至所述第二网络设备。
在示例性实施例中，所述装置1000还包括：获取请求发送模块，用于当所述第一测量结果满足第七条件时，向所述第一网络设备发送测量结果获取请求，所述测量结果获取请求用于请求获取所述第二测量结果。
综上所述，本申请实施例提供的技术方案中，通过网络侧对终端发送的第一信号进行测量，并基于该第一信号的测量结果进行切换决策，对于终端和网络设备之间高传输时延或高移动性的场景，一方面，不会出现网络侧无法获取到测量结果或者获取到已经失效的测量结果的问题，从而保证了切换的可靠性，终端能够顺利地从一个网络设备切换至另一个网络设备，确保网络侧始终有为终端服务的网络设备，进而也就保证了终端的数据传输的可靠性；另一方面，通过网络侧对终端发送的第一信号进行测量，这就省去了终端上报测量结果的步骤，从而降低了切换的时延，也降低了空口的信令开销。
请参考图11，其示出了本申请另一个实施例提供的切换控制装置的框图。该装置具有实现上述终端侧的方法示例的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该装置可以是上文介绍的终端，也可以设置在终端中。如图11所示，该装置1100可以包括：配置信息接收模块1110和上行信号发送模块1120。
配置信息接收模块1110，用于接收第一配置信息，所述第一配置信息用于指示第一信号的发送配置。
上行信号发送模块1120，用于根据所述第一配置信息发送所述第一信号；其中，所述第一信号的测量结果用于网络侧决策是否对所述终端连接的网络设备进行切换。
综上所述，本申请实施例提供的技术方案中，通过网络侧对终端发送的第一信号进行测量，并基于该第一信号的测量结果进行切换决策，对于终端和网络设备之间高传输时延或高 移动性的场景，一方面，不会出现网络侧无法获取到测量结果或者获取到已经失效的测量结果的问题，从而保证了切换的可靠性，终端能够顺利地从一个网络设备切换至另一个网络设备，确保网络侧始终有为终端服务的网络设备，进而也就保证了终端的数据传输的可靠性；另一方面，通过网络侧对终端发送的第一信号进行测量，这就省去了终端上报测量结果的步骤，从而降低了切换的时延，也降低了空口的信令开销。
请参考图12，其示出了本申请另一个实施例提供的切换控制装置的框图。该装置具有实现上述第一网络设备侧的方法示例的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该装置可以是上文介绍的第一网络设备，也可以设置在第一网络设备中。如图12所示，该装置1200可以包括：测量结果接收模块1210、切换请求发送模块1220、确认消息接收模块1230和指定条件确认模块1240。
测量结果接收模块1210，用于接收终端发送的下行参考信号的测量结果。
切换请求发送模块1220，用于根据所述测量结果，向至少一个第二网络设备发送切换请求消息，所述切换请求消息用于请求将所述终端切换至所述至少一个第二网络设备。
确认消息接收模块1230，用于接收所述至少一个第二网络设备中的目标第二网络设备发送的切换确认消息，所述切换确认消息用于确认将所述终端切换至所述目标第二网络设备。
指定条件确认模块1240，用于在确认所述目标第二网络设备满足指定条件的情况下，不向所述终端发送切换命令。
在示例性实施例中，所述指定条件包括以下至少一项：
所述目标第二网络设备的小区和所述第一网络设备的小区属于同一小区组且满足第一特征；
所述切换确认消息中不携带资源分配信息，所述资源分配信息用于指示所述目标第二网络设备为所述终端分配的资源；以及，
所述切换确认消息指示所述目标第二网络设备为所述终端提供的资源配置与所述第一网络设备为所述终端提供的资源配置相同。
在示例性实施例中，所述第一特征包括以下至少一项：
所述目标第二网络设备的小区和所述第一网络设备的小区共用同一个物理小区标识PCI，且所述目标第二网络设备的小区和所述第一网络设备的小区的波束配置不同；
所述目标第二网络设备的小区和所述第一网络设备的小区共用同一个虚拟PCI，且所述终端在与所述目标第二网络设备和所述第一网络设备进行通信时，使用所述虚拟PCI进行加扰和解码；
所述目标第二网络设备的小区和所述第一网络设备的小区共享无线资源；以及，
所述目标第二网络设备的小区对应的时间提前量和/或所述第一网络设备的小区对应的时间提前量满足条件。
在示例性实施例中，所述第二网络设备的小区与所述第一网络设备的小区，属于同一小区组。
在示例性实施例中，所述装置1200还包括：目标设备选择模块，用于当所述第一网络设备接收到至少两个第二网络设备发送的切换确认消息时，从所述至少两个第二网络设备中选择所述目标第二网络设备；
其中，所述目标第二网络设备是与所述第一网络设备的小区属于同一小区组的第二网络设备，或者，所述目标第二网络设备是小区内信道质量最优的第二网络设备，或者，所述目标第二网络设备是能够支持所述终端的特定业务的第二网络设备。
综上所述，在本实施例中，对于基于下行参考信号测量上报的切换方案，网络侧也可以实现在不向终端发送切换命令的情况下，实现对终端的服务小区的切换，实现了终端无感知的切换，且有助于节省信令开销。
需要说明的一点是，上述实施例提供的装置在实现其功能时，仅以上述各个功能模块的划分进行举例说明，实际应用中，可以根据实际需要而将上述功能分配由不同的功能模块完成，即将设备的内容结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
关于上述实施例中的装置，其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述，此处将不做详细阐述说明。
请参考图13，其示出了本申请一个实施例提供的网络设备130的结构示意图。该网络设备130可以是卫星或基站。该网络设备130可以包括：处理器131、接收器132、发射器133、存储器134和总线135。
处理器131包括一个或者一个以上处理核心，处理器131通过运行软件程序以及模块，从而执行各种功能应用以及信息处理。
接收器132和发射器133可以实现为一个通信组件，该通信组件可以是一块通信芯片。
存储器134通过总线135与处理器131相连。
存储器134可用于存储计算机程序，处理器131用于执行该计算机程序，以实现上述方法实施例中的第一网络设备执行的各个步骤，或者实现上述方法实施例中的第二网络设备执行的各个步骤。
此外，存储器134可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，易失性或非易失性存储设备包括但不限于：磁盘或光盘，电可擦除可编程只读存储器(EEPROM)，可擦除可编程只读存储器(EPROM)，静态随时存取存储器(SRAM)，只读存储器(ROM)，磁存储器，快闪存储器，可编程只读存储器(PROM)。
请参考图14，其示出了本申请一个实施例提供的终端140的结构示意图，该终端140可以包括：处理器141、接收器142、发射器143、存储器144和总线145。
处理器141包括一个或者一个以上处理核心，处理器141通过运行软件程序以及模块，从而执行各种功能应用以及信息处理。
接收器142和发射器143可以实现为一个通信组件，该通信组件可以是一块通信芯片。
存储器144通过总线145与处理器141相连。
存储器144可用于存储计算机程序，处理器141用于执行该计算机程序，以实现上述方法实施例中的终端执行的各个步骤。
此外，存储器144可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，易失性或非易失性存储设备包括但不限于：磁盘或光盘，电可擦除可编程只读存储器(EEPROM)，可擦除可编程只读存储器(EPROM)，静态随时存取存储器(SRAM)，只读存储器(ROM)，磁存储器，快闪存储器，可编程只读存储器(PROM)。
本申请实施例还提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序由处理器加载并执行以实现上述网络设备侧的切换控制方法。
本申请实施例还提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序由处理器加载并执行以实现上述终端侧的切换控制方法。
本申请还提供了一种计算机程序产品，当计算机程序产品在计算机上运行时，使得计算机执行上述网络设备侧的切换控制方法。
本申请还提供了一种计算机程序产品，当计算机程序产品在计算机上运行时，使得计算机执行上述终端侧的切换控制方法。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请实施例所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个 地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述仅为本申请的示例性实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (56)

  1. 一种切换控制方法，其特征在于，所述方法包括：
    第一网络设备向终端发送第一配置信息，所述第一配置信息用于指示第一信号的发送配置；
    所述第一网络设备向a个第二网络设备发送测量指示信息，所述测量指示信息用于指示所述a个第二网络设备对所述终端发送的所述第一信号进行测量，得到第一测量结果，所述第一测量结果用于决策是否对所述终端连接的网络设备进行切换，所述a为正整数。
  2. 根据权利要求1所述的方法，其特征在于，所述第一信号属于上行参考信号。
  3. 根据权利要求1或2所述的方法，其特征在于，所述测量指示信息包括：
    所述第一配置信息；
    和/或，
    第一测量激活指令，所述第一测量激活指令用于触发所述a个第二网络设备激活对所述第一信号的测量。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述测量指示信息包括以下至少一项：所述第一信号的测量开始时刻、所述第一信号的测量结束时刻、所述第一信号的测量持续时长、以及所述第一信号的测量周期。
  5. 根据权利要求1至4任一项所述的方法，其特征在于，所述第一网络设备向终端发送第一信号的配置信息之后，还包括：
    所述第一网络设备对所述第一信号进行测量，得到第二测量结果；
    所述第一网络设备接收所述a个第二网络设备中的b个第二网络设备发送的所述第一测量结果，所述b为小于或等于所述a的正整数；
    当所述第二测量结果满足第一条件，且所述b个第二网络设备中的目标第二网络设备发送的所述第一测量结果满足第二条件时，或者，当所述目标第二网络设备发送的所述第一测量结果满足所述第二条件时，所述第一网络设备向所述目标第二网络设备发送切换请求消息，所述切换请求消息用于请求将所述终端切换至所述目标第二网络设备。
  6. 根据权利要求5所述的方法，其特征在于，所述第一条件包括以下任意一项：
    所述第二测量结果小于或等于第一门限值；
    所述第二测量结果连续N次小于或等于所述第一门限值；
    所述第二测量结果小于或等于所述第一门限值的持续时长大于或等于第一时长；以及，
    所述第二测量结果连续N次小于或等于所述第一门限值的持续时长大于或等于所述第一时长；
    其中，所述N为正整数。
  7. 根据权利要求5或6所述的方法，其特征在于，所述第二条件包括以下任意一项：
    所述第一测量结果大于或等于第二门限值；
    所述第一测量结果连续M次大于或等于所述第二门限值；
    所述第一测量结果大于或等于所述第二门限值的持续时长大于或等于第二时长；以及，
    所述第一测量结果连续M次大于或等于所述第二门限值的持续时长大于或等于所述第二时长；
    其中，所述M为正整数。
  8. 根据权利要求5至7任一项所述的方法，其特征在于，所述第一网络设备对所述第一信号进行测量，得到第二测量结果之后，还包括：
    当所述第二测量结果满足第三条件时，所述第一网络设备向所述a个第二网络设备发送测量反馈指令，所述测量反馈指令用于指示所述a个第二网络设备将所述第一测量结果发送给所述第一网络设备。
  9. 根据权利要求1至4任一项所述的方法，其特征在于，所述第一网络设备向a个第二网络设备发送测量指示信息之后，还包括：
    所述第一网络设备接收所述a个第二网络设备中的b个第二网络设备发送的切换指示信息，所述b个第二网络设备中的目标第二网络设备发送的切换指示信息用于指示将所述终端切换至所述目标第二网络设备，所述b为小于或等于所述a的正整数。
  10. 根据权利要求9所述的方法，其特征在于，所述第一网络设备接收所述a个第二网络设备中的b个第二网络设备发送的切换指示信息之前，还包括：
    所述第一网络设备对所述第一信号进行测量，得到第二测量结果；
    所述第一网络设备向所述a个第二网络设备发送所述第二测量结果。
  11. 根据权利要求1至10任一项所述的方法，其特征在于，所述第一网络设备向终端发送第一配置信息之后，还包括：
    当所述第一网络设备对所述第一信号进行测量得到的第二测量结果满足第四条件时，所述第一网络设备向所述a个第二网络设备发送所述测量指示信息。
  12. 根据权利要求1至11任一项所述的方法，其特征在于，所述第一网络设备向a个第二网络设备发送测量指示信息之后，还包括：
    所述第一网络设备向所述终端发送切换命令，所述切换命令用于指示所述终端从所述第一网络设备切换至所述a个第二网络设备中的目标第二网络设备。
  13. 根据权利要求1至11任一项所述的方法，其特征在于，所述第一网络设备向a个第二网络设备发送测量指示信息之后，还包括：
    所述第一网络设备接收所述a个第二网络设备中的目标第二网络设备发送的切换确认消息，所述切换确认消息用于确认将所述终端切换至所述目标第二网络设备；
    所述第一网络设备在确认所述目标第二网络设备满足指定条件的情况下，所述第一网络设备不向所述终端发送切换命令。
  14. 根据权利要求13所述的方法，其特征在于，所述指定条件包括以下至少一项：
    所述目标第二网络设备的小区和所述第一网络设备的小区属于同一小区组且满足第一特征；
    所述切换确认消息中不携带资源分配信息，所述资源分配信息用于指示所述目标第二网络设备为所述终端分配的资源；以及，
    所述切换确认消息指示所述目标第二网络设备为所述终端提供的资源配置与所述第一网络设备为所述终端提供的资源配置相同。
  15. 根据权利要求14所述的方法，其特征在于，所述第一特征包括以下至少一项：
    所述目标第二网络设备的小区和所述第一网络设备的小区共用同一个物理小区标识PCI，且所述目标第二网络设备的小区和所述第一网络设备的小区的波束配置不同；
    所述目标第二网络设备的小区和所述第一网络设备的小区共用同一个虚拟PCI，且所述终端在与所述目标第二网络设备和所述第一网络设备进行通信时，使用所述虚拟PCI进行加扰和解码；
    所述目标第二网络设备的小区和所述第一网络设备的小区共享无线资源；以及，
    所述目标第二网络设备的小区对应的时间提前量和/或所述第一网络设备的小区对应的时间提前量满足条件。
  16. 一种切换控制方法，其特征在于，所述方法包括：
    第二网络设备接收第一网络设备发送的测量指示信息；
    所述第二网络设备根据所述测量指示信息，对终端发送的第一信号进行测量得到第一测量结果，所述第一测量结果用于决策是否对所述终端连接的网络设备进行切换。
  17. 根据权利要求16所述的方法，其特征在于，所述第二网络设备根据所述测量指示信息，对终端发送的第一信号进行测量得到第一测量结果之后，还包括：
    所述第二网络设备向所述第一网络设备发送所述第一测量结果。
  18. 根据权利要求17所述的方法，其特征在于，所述第二网络设备向所述第一网络设备发送所述第一测量结果，包括：
    所述第二网络设备每获取到一次所述第一测量结果，则将所述第一测量结果发送给所述第一网络设备；或者，
    所述第二网络设备将一段时间内获取的第一测量结果进行处理，得到处理后的第一测量结果，将所述处理后的第一测量结果发送给所述第一网络设备；或者，
    所述第二网络设备在所述第一测量结果满足第五条件时，向所述第一网络设备发送所述第一测量结果；或者，
    所述第二网络设备在接收到所述第一网络设备发送的测量反馈指令之后，向所述第一网络设备发送所述第一测量结果；或者，
    所述第二网络设备在接收到所述第一网络设备发送的测量反馈指令之后，且在所述第一测量结果满足第六条件时，向所述第一网络设备发送所述第一测量结果。
  19. 根据权利要求16所述的方法，其特征在于，所述方法还包括：
    所述第二网络设备接收所述第一网络设备发送的第二测量结果，所述第二测量结果是所述第一网络设备对所述第一信号进行测量得到的结果；
    当所述第二测量结果满足第一条件，且所述第一测量结果满足第二条件时，或者，当所述第一测量结果满足所述第二条件时，所述第二网络设备向所述第一网络设备发送切换指示信息，所述切换指示信息用于指示将所述终端切换至所述第二网络设备。
  20. 根据权利要求19所述的方法，其特征在于，所述第二网络设备根据所述测量指示信息，对终端发送的第一信号进行测量得到第一测量结果之后，还包括：
    当所述第一测量结果满足第七条件时，所述第二网络设备向所述第一网络设备发送测量结果获取请求，所述测量结果获取请求用于请求获取所述第二测量结果。
  21. 一种切换控制方法，其特征在于，所述方法包括：
    终端接收第一配置信息，所述第一配置信息用于指示第一信号的发送配置；
    所述终端根据所述第一配置信息发送所述第一信号；
    其中，所述第一信号的测量结果用于网络侧决策是否对所述终端连接的网络设备进行切换。
  22. 一种切换控制方法，其特征在于，所述方法包括：
    第一网络设备接收终端发送的下行参考信号的测量结果；
    所述第一网络设备根据所述测量结果，向至少一个第二网络设备发送切换请求消息，所述切换请求消息用于请求将所述终端切换至所述至少一个第二网络设备；
    所述第一网络设备接收所述至少一个第二网络设备中的目标第二网络设备发送的切换确认消息，所述切换确认消息用于确认将所述终端切换至所述目标第二网络设备；
    所述第一网络设备在确认所述目标第二网络设备满足指定条件的情况下，所述第一网络设备不向所述终端发送切换命令。
  23. 根据权利要求22所述的方法，其特征在于，所述指定条件包括以下至少一项：
    所述目标第二网络设备的小区和所述第一网络设备的小区属于同一小区组且满足第一特征；
    所述切换确认消息中不携带资源分配信息，所述资源分配信息用于指示所述目标第二网络设备为所述终端分配的资源；以及，
    所述切换确认消息指示所述目标第二网络设备为所述终端提供的资源配置与所述第一网络设备为所述终端提供的资源配置相同。
  24. 根据权利要求23所述的方法，其特征在于，所述第一特征包括以下至少一项：
    所述目标第二网络设备的小区和所述第一网络设备的小区共用同一个物理小区标识 PCI，且所述目标第二网络设备的小区和所述第一网络设备的小区的波束配置不同；
    所述目标第二网络设备的小区和所述第一网络设备的小区共用同一个虚拟PCI，且所述终端在与所述目标第二网络设备和所述第一网络设备进行通信时，使用所述虚拟PCI进行加扰和解码；
    所述目标第二网络设备的小区和所述第一网络设备的小区共享无线资源；以及，
    所述目标第二网络设备的小区对应的时间提前量和/或所述第一网络设备的小区对应的时间提前量满足条件。
  25. 根据权利要求22至24任一项所述的方法，其特征在于，所述第二网络设备的小区与所述第一网络设备的小区，属于同一小区组。
  26. 根据权利要求22至25任一项所述的方法，其特征在于，所述第一网络设备根据所述测量结果，向至少一个第二网络设备发送切换请求消息之后，还包括：
    若所述第一网络设备接收到至少两个第二网络设备发送的切换确认消息，则所述第一网络设备从所述至少两个第二网络设备中选择所述目标第二网络设备；
    其中，所述目标第二网络设备是与所述第一网络设备的小区属于同一小区组的第二网络设备，或者，所述目标第二网络设备是小区内信道质量最优的第二网络设备，或者，所述目标第二网络设备是能够支持所述终端的特定业务的第二网络设备。
  27. 一种切换控制装置，其特征在于，应用于第一网络设备，所述装置包括：
    配置信息发送模块，用于向终端发送第一配置信息，所述第一配置信息用于指示第一信号的发送配置；
    测量指示发送模块，用于向a个第二网络设备发送测量指示信息，所述测量指示信息用于指示所述a个第二网络设备对所述终端发送的所述第一信号进行测量，得到第一测量结果，所述第一测量结果用于决策是否对所述终端连接的网络设备进行切换，所述a为正整数。
  28. 根据权利要求27所述的装置，其特征在于，所述第一信号属于上行参考信号。
  29. 根据权利要求27或28所述的装置，其特征在于，所述测量指示信息包括：
    所述第一配置信息；
    和/或，
    第一测量激活指令，所述第一测量激活指令用于触发所述a个第二网络设备激活对所述第一信号的测量。
  30. 根据权利要求27至29任一项所述的装置，其特征在于，所述测量指示信息包括以下至少一项：所述第一信号的测量开始时刻、所述第一信号的测量结束时刻、所述第一信号的测量持续时长、以及所述第一信号的测量周期。
  31. 根据权利要求27至30任一项所述的装置，其特征在于，所述装置还包括：
    上行信号测量模块，用于对所述第一信号进行测量，得到第二测量结果；
    测量结果接收模块，用于接收所述a个第二网络设备中的b个第二网络设备发送的所述第一测量结果，所述b为小于或等于所述a的正整数；
    切换请求发送模块，用于当所述第二测量结果满足第一条件，且所述b个第二网络设备中的目标第二网络设备发送的所述第一测量结果满足第二条件时，或者，当所述目标第二网络设备发送的所述第一测量结果满足所述第二条件时，向所述目标第二网络设备发送切换请求消息，所述切换请求消息用于请求将所述终端切换至所述目标第二网络设备。
  32. 根据权利要求31所述的装置，其特征在于，所述第一条件包括以下任意一项：
    所述第二测量结果小于或等于第一门限值；
    所述第二测量结果连续N次小于或等于所述第一门限值；
    所述第二测量结果小于或等于所述第一门限值的持续时长大于或等于第一时长；以及，
    所述第二测量结果连续N次小于或等于所述第一门限值的持续时长大于或等于所述第一时长；
    其中，所述N为正整数。
  33. 根据权利要求31或32所述的装置，其特征在于，所述第二条件包括以下任意一项：
    所述第一测量结果大于或等于第二门限值；
    所述第一测量结果连续M次大于或等于所述第二门限值；
    所述第一测量结果大于或等于所述第二门限值的持续时长大于或等于第二时长；以及，
    所述第一测量结果连续M次大于或等于所述第二门限值的持续时长大于或等于所述第二时长；
    其中，所述M为正整数。
  34. 根据权利要求31至33任一项所述的装置，其特征在于，所述装置还包括：
    反馈指令发送模块，用于当所述第二测量结果满足第三条件时，向所述a个第二网络设备发送测量反馈指令，所述测量反馈指令用于指示所述a个第二网络设备将所述第一测量结果发送给所述第一网络设备。
  35. 根据权利要求27至30任一项所述的装置，其特征在于，所述装置还包括：
    指示信息接收模块，用于接收所述a个第二网络设备中的b个第二网络设备发送的切换指示信息，所述b个第二网络设备中的目标第二网络设备发送的切换指示信息用于指示将所述终端切换至所述目标第二网络设备，所述b为小于或等于所述a的正整数。
  36. 根据权利要求35所述的装置，其特征在于，所述装置还包括：
    上行信号测量模块，用于对所述第一信号进行测量，得到第二测量结果；
    测量结果发送模块，用于向所述a个第二网络设备发送所述第二测量结果。
  37. 根据权利要求27至36任一项所述的方法，其特征在于，所述装置还包括：
    测量指示发送模块，用于当所述第一网络设备对所述第一信号进行测量得到的第二测量结果满足第四条件时，向所述a个第二网络设备发送所述测量指示信息。
  38. 根据权利要求27至37任一项所述的装置，其特征在于，所述装置还包括：
    切换命令发送模块，用于向所述终端发送切换命令，所述切换命令用于指示所述终端从所述第一网络设备切换至所述a个第二网络设备中的目标第二网络设备。
  39. 根据权利要求27至37任一项所述的装置，其特征在于，所述装置还包括：
    确认消息接收模块，用于接收所述a个第二网络设备中的目标第二网络设备发送的切换确认消息，所述切换确认消息用于确认将所述终端切换至所述目标第二网络设备；
    指定条件确认模块，用于在确认所述目标第二网络设备满足指定条件的情况下，不向所述终端发送切换命令。
  40. 根据权利要求39所述的装置，其特征在于，所述指定条件包括以下至少一项：
    所述目标第二网络设备的小区和所述第一网络设备的小区属于同一小区组且满足第一特征；
    所述切换确认消息中不携带资源分配信息，所述资源分配信息用于指示所述目标第二网络设备为所述终端分配的资源；以及，
    所述切换确认消息指示所述目标第二网络设备为所述终端提供的资源配置与所述第一网络设备为所述终端提供的资源配置相同。
  41. 根据权利要求40所述的装置，其特征在于，所述第一特征包括以下至少一项：
    所述目标第二网络设备的小区和所述第一网络设备的小区共用同一个物理小区标识PCI，且所述目标第二网络设备的小区和所述第一网络设备的小区的波束配置不同；
    所述目标第二网络设备的小区和所述第一网络设备的小区共用同一个虚拟PCI，且所述终端在与所述目标第二网络设备和所述第一网络设备进行通信时，使用所述虚拟PCI进行加扰和解码；
    所述目标第二网络设备的小区和所述第一网络设备的小区共享无线资源；以及，
    所述目标第二网络设备的小区对应的时间提前量和/或所述第一网络设备的小区对应的 时间提前量满足条件。
  42. 一种切换控制装置，其特征在于，应用于第二网络设备，所述装置包括：
    测量指示接收模块，用于接收第一网络设备发送的测量指示信息；
    上行信号测量模块，用于根据所述测量指示信息，对终端发送的第一信号进行测量得到第一测量结果，所述第一测量结果用于决策是否对所述终端连接的网络设备进行切换。
  43. 根据权利要求42所述的装置，其特征在于，所述装置还包括：
    测量接收发送模块，用于向所述第一网络设备发送所述第一测量结果。
  44. 根据权利要求43所述的装置，其特征在于，所述测量接收发送模块，用于：
    每获取到一次所述第一测量结果，则将所述第一测量结果发送给所述第一网络设备；或者，
    将一段时间内获取的第一测量结果进行处理，得到处理后的第一测量结果，将所述处理后的第一测量结果发送给所述第一网络设备；或者，
    在所述第一测量结果满足第五条件时，向所述第一网络设备发送所述第一测量结果；或者，
    在接收到所述第一网络设备发送的测量反馈指令之后，向所述第一网络设备发送所述第一测量结果；或者，
    在接收到所述第一网络设备发送的测量反馈指令之后，且在所述第一测量结果满足第六条件时，向所述第一网络设备发送所述第一测量结果。
  45. 根据权利要求42所述的装置，其特征在于，所述装置还包括：
    测量结果接收模块，用于接收所述第一网络设备发送的第二测量结果，所述第二测量结果是所述第一网络设备对所述第一信号进行测量得到的结果；
    切换指示发送模块，用于当所述第二测量结果满足第一条件且所述第一测量结果满足第二条件时，或者，当所述第一测量结果满足所述第二条件时，向所述第一网络设备发送切换指示信息，所述切换指示信息用于指示将所述终端切换至所述第二网络设备。
  46. 根据权利要求45所述的装置，其特征在于，所述装置还包括：
    获取请求发送模块，用于当所述第一测量结果满足第七条件时，向所述第一网络设备发送测量结果获取请求，所述测量结果获取请求用于请求获取所述第二测量结果。
  47. 一种切换控制装置，其特征在于，应用于终端，所述装置包括：
    配置信息接收模块，用于接收第一配置信息，所述第一配置信息用于指示第一信号的发送配置；
    上行信号发送模块，用于根据所述第一配置信息发送所述第一信号；
    其中，所述第一信号的测量结果用于网络侧决策是否对所述终端连接的网络设备进行切换。
  48. 一种切换控制装置，其特征在于，应用于第一网络设备，所述装置包括：
    测量结果接收模块，用于接收终端发送的下行参考信号的测量结果；
    切换请求发送模块，用于根据所述测量结果，向至少一个第二网络设备发送切换请求消息，所述切换请求消息用于请求将所述终端切换至所述至少一个第二网络设备；
    确认消息接收模块，用于接收所述至少一个第二网络设备中的目标第二网络设备发送的切换确认消息，所述切换确认消息用于确认将所述终端切换至所述目标第二网络设备；
    指定条件确认模块，用于在确认所述目标第二网络设备满足指定条件的情况下，不向所述终端发送切换命令。
  49. 根据权利要求48所述的装置，其特征在于，所述指定条件包括以下至少一项：
    所述目标第二网络设备的小区和所述第一网络设备的小区属于同一小区组且满足第一特征；
    所述切换确认消息中不携带资源分配信息，所述资源分配信息用于指示所述目标第二网 络设备为所述终端分配的资源；以及，
    所述切换确认消息指示所述目标第二网络设备为所述终端提供的资源配置与所述第一网络设备为所述终端提供的资源配置相同。
  50. 根据权利要求49所述的装置，其特征在于，所述第一特征包括以下至少一项：
    所述目标第二网络设备的小区和所述第一网络设备的小区共用同一个物理小区标识PCI，且所述目标第二网络设备的小区和所述第一网络设备的小区的波束配置不同；
    所述目标第二网络设备的小区和所述第一网络设备的小区共用同一个虚拟PCI，且所述终端在与所述目标第二网络设备和所述第一网络设备进行通信时，使用所述虚拟PCI进行加扰和解码；
    所述目标第二网络设备的小区和所述第一网络设备的小区共享无线资源；以及，
    所述目标第二网络设备的小区对应的时间提前量和/或所述第一网络设备的小区对应的时间提前量满足条件。
  51. 根据权利要求48至50任一项所述的装置，其特征在于，所述第二网络设备的小区与所述第一网络设备的小区，属于同一小区组。
  52. 根据权利要求48至51任一项所述的装置，其特征在于，所述装置还包括：
    目标设备选择模块，用于当所述第一网络设备接收到至少两个第二网络设备发送的切换确认消息时，从所述至少两个第二网络设备中选择所述目标第二网络设备；
    其中，所述目标第二网络设备是与所述第一网络设备的小区属于同一小区组的第二网络设备，或者，所述目标第二网络设备是小区内信道质量最优的第二网络设备，或者，所述目标第二网络设备是能够支持所述终端的特定业务的第二网络设备。
  53. 一种网络设备，其特征在于，所述网络设备包括处理器和存储器，所述存储器存储有计算机程序，所述计算机程序用于被所述处理器执行，以实现如权利要求1至15任一项所述的切换控制方法，或者实现如权利要求16至20任一项所述的切换控制方法，或者实现如权利要求22至26任一项所述的切换控制方法。
  54. 一种终端，其特征在于，所述终端包括处理器和存储器，所述存储器存储有计算机程序，所述计算机程序用于被所述处理器执行，以实现如权利要求21所述的切换控制方法。
  55. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序，所述计算机程序用于被处理器执行，以实现如权利要求1至15任一项所述的切换控制方法，或者实现如权利要求16至20任一项所述的切换控制方法，或者实现如权利要求22至26任一项所述的切换控制方法。
  56. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序，所述计算机程序用于被处理器执行，以实现如权利要求21所述的切换控制方法。
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