WO2020029981A1 - 一种小区切换的方法、装置及系统 - Google Patents

一种小区切换的方法、装置及系统 Download PDF

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Publication number
WO2020029981A1
WO2020029981A1 PCT/CN2019/099523 CN2019099523W WO2020029981A1 WO 2020029981 A1 WO2020029981 A1 WO 2020029981A1 CN 2019099523 W CN2019099523 W CN 2019099523W WO 2020029981 A1 WO2020029981 A1 WO 2020029981A1
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WIPO (PCT)
Prior art keywords
base station
terminal device
handover
pilot signal
response message
Prior art date
Application number
PCT/CN2019/099523
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English (en)
French (fr)
Inventor
金文君
熊晓春
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP19848585.6A priority Critical patent/EP3826352A4/en
Publication of WO2020029981A1 publication Critical patent/WO2020029981A1/zh
Priority to US17/169,408 priority patent/US20210160748A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0094—Definition of hand-off measurement parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0088—Scheduling hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a method, device, and system for cell switching.
  • the terminal device performs cell measurement on the serving cell and neighboring cells according to the measurement control information obtained from the source base station. After that, the terminal device reports the measurement result of the cell measurement to the source base station, and the source The base station selects a target base station that needs to be handed over for the terminal device according to the measurement result, and then performs a handover process.
  • the terminal device when the terminal device performs cell measurement on the serving cell and the neighboring cell, it cannot identify whether the base station in the neighboring cell is a pseudo base station.
  • the pseudo base station In order for the pseudo base station to be able to attract the terminal device, Will impersonate the base station in the neighboring cell, so that the measurement result is a measurement result for a pseudo base station, and the source base station will not identify the measurement result reported by the terminal device, only based on the measurement result Determining a target base station for the terminal device, and if the measurement result reported by the terminal device is for a pseudo base station, it will cause the source base station to determine the base station in the neighboring cell as the target base station according to the measurement result.
  • the poor signal between the base station in the neighboring cell and the terminal device will cause the terminal device to be unable to access the base station in the neighboring cell, and the handover will fail.
  • the present application provides a method, device, and system for cell handover, which are used to solve the problem that terminal devices in the prior art are liable to fail over when performing cell handover.
  • an embodiment of the present application provides a method for cell switching.
  • the method includes: when a first base station determines that a handover to a second base station is required according to a measurement report from a terminal device, the first base station may report to the second base station.
  • the base station sends a handover request to inform the second base station that the terminal device needs to access the second base station; after that, the first base station receives a handover response message from the second base station, and the handover response
  • the message includes information of a pilot signal allocated by the second base station to the terminal device; then, the first base station may send a measurement control message to the terminal device, where the measurement control message is used to instruct the terminal
  • the device measures the signal quality of the pilot signal, and the measurement control message includes information of the pilot signal; when the first base station receives a measurement response message from the terminal device, the measurement response message includes Including the signal quality of the pilot signal, and after determining that the signal quality of the pilot signal meets a switching condition, performing Cell handover procedure.
  • the first base station when the terminal device needs to switch to the second base station, the first base station does not directly perform a cell handover on the terminal device, but first needs to determine the pilot reported by the terminal device. Whether the signal quality of the signal satisfies a handover condition can ensure that the terminal device can successfully access the second base station without dropping a call, and can guarantee a successful handover.
  • the first base station after determining that the signal quality of the pilot signal does not meet a handover condition, the first base station sends a handover suspension message to the second base station.
  • the first base station sends the handover suspension message, which can inform the second base station that the terminal device cannot be accessed, thereby further enabling the second base station to no longer reserve resources for the terminal device.
  • the first base station before the first base station sends a measurement control message to the terminal device, it is necessary to determine that a handover fails, and to provide services to the terminal device.
  • the first base station triggers the terminal device to measure the pilot signal only when the first base station determines that the first base station can still provide services to the terminal device, so that the terminal device can ensure that On the premise of service continuity, switch to the second base station to prevent the terminal device from being dropped due to the inability of the first base station to provide services during the measurement of the pilot signal. Words phenomenon.
  • the first base station may determine the second base station that the terminal device needs to handover in the following three ways:
  • the first base station determines a second base station that the terminal device needs to handover according to a load balancing policy.
  • the first base station determines the second base station based on a service request of the terminal device.
  • the first base station determines the second base station based on a frequency priority of a cell.
  • the first base station determines that the terminal device needs to be handed over to the second base station, which is more flexible and can be applied in different scenarios with a wider application range.
  • the first base station may further receive a handover request from a third base station, and then send a handover response message to the third base station, where the handover response message includes the first base station as Information of the pilot signal allocated by the terminal device, that is, the first base station can also be used as a base station that needs to be handed over after the terminal device or other terminal device, and a pilot signal can be allocated to the terminal device,
  • the three base stations are base stations different from the first base station.
  • the first base station when the first base station is a base station that needs to be handed over by the terminal device in the future, it may also allocate pilot information to the terminal device, and then trigger the terminal device to assign the first base station to the terminal device.
  • the measurement process of the pilot information can further ensure that the terminal device can successfully access the first base station and ensure a success rate of handover.
  • an embodiment of the present application provides a method for cell handover.
  • the method includes: a second base station first receiving a handover request from a first base station; and then, the second base station sends a handover to the first base station.
  • the handover response message sent by the second base station to the first base station must include information of a pilot signal allocated by the second base station to the terminal device, which can trigger the first base station to instruct the
  • the terminal device measures the pilot signal allocated by the second base station to the terminal device, thereby avoiding call failure due to the handover failure of the terminal device, and also ensuring the success rate of cell switching by the terminal device.
  • the second base station receives a handover abort message from the first base station, and stops reserving resources for the terminal device.
  • the second base station can be notified in time through the handover suspension message, which can effectively save resources and improve the efficiency of cell handover.
  • an embodiment of the present application provides a method for cell switching.
  • the method includes: a terminal device may receive a measurement control message from the first base station, and the measurement control message is used to instruct the terminal device to Measuring the signal quality of the pilot signal allocated by the second base station for the terminal device, wherein the measurement control message includes information of the pilot signal allocated by the second base station for the terminal device; and upon receiving the measurement, After the control message, the terminal device measures the signal quality of the pilot signal according to the measurement control message; after the measurement ends, the terminal device sends the measurement response message to the first base station, the The measurement response message includes the signal quality of the pilot signal.
  • the terminal device does not directly access the second base station, but needs to measure the signal quality of the pilot signal first, which can ensure that the terminal device can successfully access the first base station. Two base stations will not drop calls.
  • an embodiment of the present application further provides a communication device, where the communication device is applied to a first base station.
  • the device has the function of implementing the behavior in the method example of the first aspect described above.
  • the functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the structure of the device includes a receiving unit, a processing unit, and a sending unit. These units can perform the corresponding functions in the method example of the first aspect described above. For details, refer to the detailed description in the method example. To repeat.
  • an embodiment of the present application further provides a communication device, where the communication device is applied to a second base station.
  • the device has the function of implementing the behavior in the method example of the second aspect described above.
  • the functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the structure of the device includes a receiving unit and a sending unit, and these units may perform corresponding functions in the method example of the second aspect described above. For details, refer to the detailed description in the method example, and details are not described herein.
  • an embodiment of the present application further provides a communication apparatus, which is applied to a terminal device.
  • the device has the function of implementing the behavior in the method example of the third aspect described above.
  • the functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the structure of the device includes a receiving unit, a processing unit, and a sending unit. These units can perform the corresponding functions in the method example of the third aspect. For details, refer to the detailed description in the method example. To repeat.
  • an embodiment of the present application further provides a communication device, where the communication device is applied to a first base station.
  • the structure of the communication device includes a processor and a memory, and the processor is configured to support the terminal to perform a corresponding function in the method of the first aspect.
  • the memory is coupled to the processor and stores program instructions and data necessary for the communication device.
  • the structure of the communication device further includes a communication interface for communicating with other devices.
  • an embodiment of the present application further provides a communication device, where the communication device is applied to a second base station.
  • the structure of the communication device includes a processor and a memory, and the processor is configured to support the terminal to execute a corresponding function in the method of the second aspect.
  • the memory is coupled to the processor and stores program instructions and data necessary for the communication device.
  • the structure of the communication device further includes a communication interface for communicating with other devices.
  • an embodiment of the present application further provides a communication device, where the communication device is applied to a terminal device.
  • the structure of the communication device includes a processor and a memory, and the processor is configured to support the terminal to perform a corresponding function in the method of the third aspect.
  • the memory is coupled to the processor and stores program instructions and data necessary for the communication device.
  • the structure of the communication device further includes a communication interface for communicating with other devices.
  • an embodiment of the present application further provides a communication system.
  • the communication system includes a first base station and a second base station.
  • the first base station is configured to send a handover request to the second base station if it is determined that a handover to the second base station is required according to a measurement report from a terminal device;
  • the second base station is configured to receive a handover request sent by the first base station; and send a handover response message to the first base station, where the handover response message includes a resource allocated by the second base station to the terminal device; Information of pilot signals;
  • the first base station is further configured to receive a handover response message sent by the second base station; and send a measurement control message to the terminal device, where the measurement control message includes information of the pilot signal; A measurement response message of the terminal device, where the measurement response message includes the signal quality of the pilot signal; and when the signal quality of the pilot signal meets a handover condition, a cell handover process for the terminal device is performed.
  • the first base station may further send a handover suspension message to the second base station.
  • the first base station before the first base station sends a measurement control message to the terminal device, it is necessary to determine that a handover fails, and to provide services to the terminal device.
  • the following manner may be specifically adopted:
  • the system further includes a third base station; the first base station is further configured to receive a handover request from the third base station; and send a handover response message to the third base station, the The handover response message includes information of a pilot signal allocated by the first base station to the terminal device.
  • the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores instructions, and when the computer-readable storage medium runs on the computer, the computer causes the computer to execute the methods described in the above aspects.
  • the present application also provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the methods described in the above aspects.
  • the present application also provides a computer chip, the chip is connected to a memory, and the chip is configured to read and execute a software program stored in the memory and execute the methods described in the foregoing aspects.
  • FIG. 1 is a schematic diagram of a cell handover method
  • FIG. 2 is a schematic structural diagram of a network architecture provided by this application.
  • FIG. 3 is a schematic diagram of a cell switching method provided by the present application.
  • FIG. 4 is a schematic diagram of a cell switching method provided by the present application.
  • 5 to 9 are schematic structural diagrams of a communication device provided by the present application.
  • FIG. 10 is a schematic structural diagram of a communication system of the present application.
  • This application provides a method, device, and system for cell switching, which are used to solve the problem that terminal devices are more likely to fail during cell switching in the prior art.
  • Figure 1 shows a common cell handover method, which can be divided into three processes: UE measurement process, handover decision and handover preparation process, and handover execution process.
  • the method includes the following steps:
  • the source base station sends a measurement control (measurement control) message to the UE.
  • the UE After receiving the measurement control message from the source base station, the UE measures the serving cell and neighboring cells according to the measurement control message.
  • the UE may measure a signal quality of a signal transmitted on a resource block of a serving cell and a neighboring cell.
  • the UE reports a measurement report (MR) message to the source base station.
  • MR measurement report
  • the source base station When the source base station notifies the UE to perform measurement on a serving cell and a neighboring cell, the source base station will inform the UE of measurement reporting conditions. For example, the base station will inform the UE to periodically report measurement results, and the base station may also Notify the UE to report a measurement result when the signal quality of a transmitted signal on a measured resource block of a neighboring cell is higher than a certain threshold.
  • the above-mentioned measurement and reporting conditions are all examples. In fact, the measurement and reporting conditions may be based on specific conditions. Set the application scenarios.
  • S101 to S103 are UE measurement processes.
  • the UE measures the serving cell and neighboring cells according to the measurement control information issued by the source base station, and reports the measurement results to the source base station.
  • the source base station makes a handover decision based on the measurement result of the UE, and selects a target base station for the UE.
  • the source base station may include a radio resource management (radio resource management, RRM) module.
  • the RRM module in the source base station is responsible for functions of base station power control, base station load control, mobility management, and channel allocation.
  • the RRM module in the source base station may determine whether it is required according to the load condition of the source base station itself, quality of service (QOS) requirements, and the measurement results reported by the UE.
  • QOS quality of service
  • the source base station may select a target cell for the UE based on the measurement result reported by the UE. For example, the source base station may select a cell frequency point priority and cell signal quality. In order to select the target cell, the cell with the highest signal quality is selected from the cells that meet the handover conditions and have the highest frequency priority.
  • the source base station sends a handover request (HOover Request) message to the target base station.
  • HOover Request handover request
  • the target base station After receiving the HO Request message, the target base station performs handover admission determination. If the UE is allowed to handover to the target cell, the UE allocates dedicated admission resources.
  • the target base station may also include an RRM module.
  • RRM module For a related description of the RRM module, refer to the foregoing, which is not repeated here.
  • the RRM module in the target base station is based on The load situation of the target base station itself and the QOS of the service require determining whether the UE is allowed to access. If the UE is allowed to access the target cell, the target base station allocates dedicated admission resources to the UE. So that the UE can access the target cell according to the admission resource.
  • the target base station sends a handover acknowledgement (HO Request) ACK message to the source base station, where the HO Request ACK message carries information required by the UE to access the target cell.
  • HO Request handover acknowledgement
  • the information required for the UE to access the target cell includes radio resource configuration information required for bearer establishment of the air interface signaling plane and the user plane.
  • S104 to S107 are a handover decision and handover preparation process.
  • the source base station selects the target base station for the terminal device and obtains information required for the terminal device to access the target cell.
  • the source base station sends a HO command message to the UE, where the HO Command message carries information required by the UE to switch to the target cell.
  • the UE After receiving the HO Command message from the source base station, the UE starts performing handover. For example, the UE first disconnects the connection with the source base station, and then establishes synchronization with the target base station.
  • the UE sends a first random access message (MSG1) to the target base station for requesting access to the target cell, where the MSG1 carries a preamble selected by the UE for accessing the target cell ( preamble).
  • MSG1 first random access message
  • the target base station After receiving the MSG1, the target base station sends a second random access message (MSG2) to the UE, where the MSG2 carries uplink scheduling resource information.
  • MSG2 second random access message
  • the UE sends a HO Confirm message to the target base station.
  • the target base station may determine that the UE is connected to the target cell, and complete the cell handover.
  • the target base station After receiving the HO Confirm message from the UE, the target base station sends a UE Resource Release message to the source base station to notify the source base station to release the resources occupied by the terminal device.
  • S108 to S113 are handover execution processes.
  • the UE and the target base station perform a random access process, and the target base station notifies the source base station to release the resources occupied by the UE.
  • the UE measures the serving cell and the neighboring cell.
  • the pseudo base station will impersonate the real base station in the neighboring cell and send a measurement signal to the terminal device. It is not possible to identify whether the test result is for a real base station or a pseudo base station in the neighboring cell. If the measurement result is for the pseudo base station, and the real base station in the neighboring cell and the UE A weak signal will cause the source base station to determine that the base station that the UE needs to handover is the real base station in the neighboring cell, and the UE to which all the UEs are handed over, when performing a cell handover. After the real base station in the neighboring cell is described, because the signal between the real base station in the neighboring cell and the UE is poor, the handover fails, which further results in service interruption and call drop of the UE.
  • embodiments of the present application provide a method, device, and system for cell switching.
  • the following further describes the present application in detail with reference to the accompanying drawings.
  • the specific operation method in the method embodiment can also be applied to the device embodiment or the system embodiment.
  • the first base station is used as the base station to which the current terminal device is connected and is the source base station;
  • the second base station is the base station that the terminal device needs to switch over. Is the target base station.
  • the first base station after the first base station is handed over, that is, when the terminal device is not connected to the first base station, the first base station also becomes a base station that the terminal device needs to hand over. That is, the first base station may also become the target base station.
  • the method performed by the first base station may refer to the method performed by the second base station (the target base station in the embodiment of the present application).
  • the first base station may also be the target base station when other terminal equipment is performing cell switching.
  • the method performed by the first base station may also refer to the second base station (in this application The method performed by the target base station in the embodiment is not repeated here.
  • FIG. 2 it is a schematic diagram of a possible network architecture of the present application.
  • the terminal device communicates with the source base station and the target base station through a wireless interface.
  • the source base station and the target base station can communicate through a wired connection, for example, through an X2 interface and an Xn interface, or can also communicate through an air interface.
  • the source base station after determining the target base station, sends a handover request to the target base station, and obtains, from the target base station, a pilot signal allocated by the target base station to the terminal device.
  • Information carrying the information of the pilot signal in a measurement control message, instructing the terminal device to measure the signal quality of the pilot signal, and acquiring the signal quality of the pilot signal from the terminal device, After determining that the signal quality of the pilot signal satisfies a handover condition, a cell handover procedure for the terminal device is performed.
  • the terminal device may measure the signal quality of the pilot signal and report the signal quality of the pilot signal to the source base station.
  • the target base station After receiving the handover request from the source base station, the target base station carries information of a pilot signal allocated by the target base station to the terminal device in a handover response message, and sends the handover response message to the source base station. .
  • the terminal equipment in this application also known as user equipment (UE), can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on water (such as a ship, etc.); it can also be Deployed in the air (such as aircraft, balloons, satellites, etc.).
  • the terminal device may be a mobile phone, a tablet, a computer with a wireless transceiver function, a virtual reality (VR) device, an augmented reality (AR) device, or an industrial control device. ), Wireless devices in self-driving, wireless devices in remote medical, wireless devices in smart grid, wireless devices in transportation safety , Wireless devices in smart cities, wireless devices in smart homes, and so on.
  • the base stations involved in this application are the source base station and the target base station. They are devices that provide wireless communication functions for terminal equipment, including but not limited to: next-generation base stations (gnodeB, gNB) and evolved node B (evolved in 5G).
  • gnodeB next-generation base stations
  • gNB next-generation base stations
  • eNB radio network controller
  • node B NB
  • BSC base station controller
  • BTS base transceiver station
  • home A base station e.g., home node B, or home node B, HNB
  • BBU base band unit
  • TRP transmission point
  • TP transmission point
  • mobile switching center a mobile switching center
  • the cell handover scenarios can be divided into necessary handover scenarios and non-essential handover scenarios.
  • the two types of handover scenarios are described below:
  • the first type is necessary switching scene.
  • the terminal device can no longer continue to perform services in the source cell and must perform cell handover, otherwise the call will be dropped.
  • the range of movement of the terminal device exceeds the coverage of the source cell.
  • cell switching is required.
  • the uplink service quality has fallen below a threshold and cannot provide services to the terminal device.
  • cell switching is required.
  • the second type is non-essential switching scenarios.
  • the terminal device needs to perform cell handover according to some network deployment policies or network instructions. If the handover is not successful, the terminal device can still perform services in the source cell.
  • the terminal device may be switched based on a load balancing policy.
  • the terminal device may be switched to a cell with a better cell network performance during cell switching, including service-based switching and frequency priority-based switching. Switch.
  • the embodiments of the present application are not limited to a cell handover scenario, and the cell handover method provided in the embodiments of the present application may be applied to a necessary handover scenario or a non-essential handover scenario.
  • the terminal device after the source base station determines the target base station, the terminal device does not directly switch the terminal device to the target cell, but needs the terminal device to allocate the terminal device to the target base station for the terminal device.
  • the signal quality of the pilot signal is measured. After the signal quality of the pilot signal meets the handover condition, the handover process will be performed on the terminal device.
  • the signal quality of the pilot signal allocated by the target base station to the terminal device needs to be determined to ensure that the terminal device can be connected to a real base station during subsequent handovers, which can further ensure the success of the cell handover and avoid The call drop caused by the terminal device due to the switching failure is described.
  • the method includes:
  • the source base station determines a target base station to which a handover is required according to a measurement report from a terminal device.
  • the source base station determines the target base station, it needs to first receive a measurement report reported by the terminal device.
  • the measurement report is a measurement result of the terminal on a serving cell and a neighboring cell, and the source base station is based on the measurement. It is reported that a base station is selected as a target base station for the terminal device from a neighboring cell, and the selection may be based on a preset selection rule, for example, selecting a base station in a cell with a high priority or a good service quality as the target base station.
  • the source base station may determine a target base station that the terminal device needs to switch according to a load balancing policy.
  • a base station in a cell with a lighter load may be selected as the target base station according to the load of each cell.
  • the source base station may determine the target base station based on a service quality class identifier (QCI) of a service of a terminal device, or may The service request determines the target base station, and the target base station may also be determined based on a frequency priority of a cell.
  • QCI service quality class identifier
  • the source base station determines the target base station based on the QCI of the terminal device.
  • the source base station may establish the QCI service preferentially to a certain frequency point expected by the QCI service, and then determine the frequency point.
  • the base station in the corresponding cell is the target base station.
  • the source base station determines the target base station based on a service request of the terminal device.
  • the source base station may switch the terminal device to a cell that is allowed to perform services of the terminal device, and then determine the target base station to ensure service continuity.
  • the source base station determines the target base station based on a frequency priority of a cell.
  • the source base station may determine that the frequency band is higher based on the frequency priority. , And then determining the target base station.
  • the manner in which the target base station is determined based on the load balancing policy, the QCI of the service of the terminal device, the QCI of the service of the terminal device, or the service request of the terminal device belongs to Cell handover in non-essential handover scenarios; that is, the source base station can use the cell handover method provided in the embodiments of the present application in non-essential handover scenarios, and the two possible implementations described above are just examples.
  • the cell switching method provided in the embodiment of the present application is also applicable in other non-essential switching scenarios.
  • the cell switching method provided in the embodiments of the present application can also be adopted in the necessary switching scenario. Not limited.
  • the source base station determines the target base station in a more flexible manner, and the terminal device can better perform services after the handover.
  • the source base station sends a handover request to the target base station after determining the target base station that the terminal device needs to hand over.
  • the target base station receives a handover request from the source base station, and sends a handover response message to the source base station after receiving the handover request from the source base station, where the handover response message includes the target base station Information of a pilot signal allocated for the terminal device.
  • the source base station After the source base station determines the target base station, it needs to send a handover request to the target base station to notify the target base station that the terminal device needs to perform a cell handover. And after receiving the handover request, if the target base station agrees to the terminal device access, it sends a handover response message to the source base station, and the handover response message carries the target base station as the Information on pilot signals allocated by terminal equipment.
  • the pilot signal allocated by the target base station to the terminal device is a user-level pilot signal allocated by the target base station to the terminal device, and is unique to the terminal device.
  • the information is sent to the terminal device through a secure channel, and only the terminal device can obtain it.
  • the information of the pilot signal may be identification information of the pilot signal or other identification information.
  • This application does not limit the type of the information of the pilot signal, and everything can make the source base station It may be determined that the information of the pilot signals is applicable to the embodiments of the present application.
  • the handover response message includes information of the pilot signal, so that the source base station can trigger the terminal device to measure the signal quality of the pilot signal instead of directly connecting the terminal device to the terminal device.
  • the target cell can ensure that the target base station is not a pseudo base station, and further ensure that the terminal device can successfully switch to the target cell, and can ensure that the terminal device does not drop the call after the cell handover, and continues the service.
  • the source base station receives a handover response message from the target base station, and sends a measurement control message to the terminal device, where the measurement control message includes information of the pilot signal, and the measurement control information may be used to indicate The terminal device measures a signal quality of the pilot signal.
  • the source base station After receiving the handover response message from the target base station, the source base station determines that the target base station allows the terminal device to access, and then sends the measurement control message to the terminal, instructing the terminal device to the The signal quality of the pilot signal is measured, and the measurement control message carries information of the pilot signal.
  • the application does not limit the manner in which the measurement control message instructs the terminal device to measure the signal quality of the pilot signal.
  • a cell may be added to the measurement control message, and the cell indication
  • the terminal device measures the signal quality of the pilot signal, and may also set a message type of the measurement control message, where the message type is a message type indicating the measured signal quality, as long as the terminal device is receiving the kind of
  • the source base station may send the measurement control message to the terminal device.
  • the source base station can no longer provide services to the terminal device, and the terminal device may have a possibility of dropped calls.
  • the terminal device may be directly targeted for the terminal device. Perform a handover process without sending a measurement control message to the terminal device, which triggers the terminal device to measure the pilot signal.
  • the terminal device receives a measurement control message from the source base station, and the terminal device measures a signal quality of the pilot signal according to the measurement control message.
  • the terminal device After receiving the measurement control message from the source base station, the terminal device determines that the signal quality of the pilot signal needs to be measured, and then receives the measurement signal according to the information of the pilot signal carried in the measurement control message.
  • the pilot signal measures a signal quality of the pilot signal.
  • the measurement control message may further include time-frequency resource information corresponding to the pilot signal. After receiving the measurement control information, the terminal device may receive all information on the time-frequency resource corresponding to the pilot signal. Said pilot signal.
  • the terminal device measures the signal quality of the pilot signal, and may reflect the reference signal received power (RSRP) or the reference signal received quality (RSRQ) of the pilot signal.
  • RSRP reference signal received power
  • RSSQ reference signal received quality
  • a signal quality of the pilot signal A signal quality of the pilot signal.
  • the above methods for measuring the signal quality of the pilot signal are all examples.
  • the terminal device may also reflect the signal quality of the pilot signal by measuring other attributes of the information of the pilot signal. Examples are not limited.
  • the terminal device may directly perform step 306, or may further determine the signal quality of the pilot signal determined by the measurement, and after determining that the reporting conditions are met Then, go to step 306.
  • the reporting condition may be that the signal quality of the pilot signal is greater than a set threshold, that is, when the signal quality of the pilot signal is greater than the set threshold, step 306 is performed, otherwise Step 306 is executed.
  • a notification message may also be sent to the source base station to inform the source base station that the signal quality of the pilot signal does not meet the conditions, and trigger the source base station to restart the terminal device for the terminal device Select the target base station.
  • the terminal device sends the measurement response message to the source base station, where the measurement response message includes a signal quality of the pilot signal.
  • the terminal device may send the measurement response message to the source base station, and the measurement response message carries the terminal device's response to the pilot signal. The measurement result obtained after the signal quality is measured.
  • the source base station receives a measurement response message from the terminal device, and determines whether a signal quality of the pilot signal meets a handover condition.
  • the switching condition is that the signal quality of the pilot signal is greater than a first threshold.
  • the signal quality of the pilot signal is greater than the first threshold, step 308 is performed, otherwise No cell handover is performed;
  • the handover condition is that the difference between the signal quality of the pilot signal and the signal quality of the cell reference signal of the source base station is greater than a second threshold, when the signal quality of the pilot signal is If the difference between the signal quality of the cell reference signal from the source base station is greater than the second threshold, step 308 is performed; otherwise, no cell handover is performed.
  • the above two handover conditions are merely examples. In fact, this embodiment of the present application does not The switching conditions are limited. In specific implementation, the switching conditions can be set.
  • the source base station After determining that the signal quality of the pilot signal satisfies a handover condition, the source base station performs a cell handover process for the terminal device.
  • the source base station determines that the signal quality of the pilot signal satisfies a handover condition, it indicates that the terminal device can switch to the target cell, and then starts a cell handover process for the terminal device, and the execution For the cell handover process of the terminal device, refer to the handover execution process of S108 to S113 in the embodiment shown in FIG. 1, and details are not described herein again.
  • the source base station determines that the signal quality of the pilot signal does not satisfy the handover condition, it sends a handover suspension message to the target base station.
  • the source base station determines that the signal quality of the pilot signal does not meet the handover condition, it indicates that the terminal device cannot hand over to the cell where the target base station is located, and the source base station needs to notify the target base station that the handover is canceled and report to the target base station.
  • the target base station sends a handover abort message. After receiving the handover suspension message from the source base station, the target base station may determine that the terminal device cannot be handed over and does not need to allocate resources for the terminal device.
  • the source base station may also notify the terminal device of a handover failure message, informing the terminal device that it cannot switch to the target base station.
  • the cell switching method shown in FIG. 3 can be combined with the cell switching method in the prior art.
  • the following uses a specific embodiment to combine the cell switching method in this application with the cell switching method in the prior art.
  • the embodiment shown in FIG. 3 is further described.
  • another cell switching method uses a pilot signal allocated by the target base station to the terminal device as a channel state information reference signal (channel state information reference signal, CSI).
  • CSI channel state information reference signal
  • -RS channel state information reference signal
  • the source base station sends first measurement control information to the UE.
  • the UE receives first measurement control information from the source base station, and measures a serving cell and a neighboring cell according to the first measurement control information. When the measurement result meets a measurement reporting condition, the UE sends a first MR message to the source base station.
  • S401 to S402 are UE measurement processes. For specific implementation processes, refer to S101 to S103, and details are not described herein again.
  • S403 which is the same as S104, may refer to the foregoing content, which is not repeated here.
  • S404 which is the same as S105, may refer to the foregoing content, and will not be repeated here.
  • the target base station sends a HO Request ACK message to the source base station.
  • the HO Request ACK message includes information required by the UE to access the target cell, and further includes a CSI allocated by the target base station to the UE. -RS information.
  • the source base station sends a second measurement control message to the UE, where the second measurement control message includes information about a CSI-RS allocated by the target base station to the UE.
  • the source base station After the source base station receives the HO Request ACK message, if the HO Request ACK message includes CSI-RS information, it can trigger the terminal device to perform a secondary measurement and the source base station to perform a re-decision process. .
  • the secondary measurement refers to the measurement of the signal quality of the CSI-RS
  • the terminal device has already performed the measurement on the serving cell and the neighboring cell once in S402. Measurement, the measurement of the signal quality of the CSI-RS is called a secondary measurement; correspondingly, the re-decision process refers to the determination process of the source base station based on the measurement result of the signal quality of the CSI-RS.
  • the source base station has already made a handover decision based on the measurement result reported by the terminal device. Therefore, the determination of the measurement result of the signal quality of the CSI-RS by the source base station is referred to as re-determination.
  • the source base station may also include the CSI-RS information in the HO Request ACK message, and the current cell switching scenario is an unnecessary cell switching scenario, triggering the terminal device to perform a secondary measurement, and the The source base station performs the re-decision process.
  • the UE receives a second measurement control message from the source base station, and then measures the signal quality of the CSI-RS according to the second measurement control message.
  • the UE sends a second MR message to the source base station, where the second MR message includes a measurement result of the UE measuring the signal quality of the CSI-RS, that is, the second MR message
  • the MR message includes the signal quality of the CSI-RS.
  • the source base station After the source base station receives a second MR message from the UE, the source base station performs a handover decision according to the second MR message to determine whether the signal quality of the CSI-RS meets a handover condition.
  • the source base station performs a cell handover process for the terminal device.
  • the UE and the target base station perform a random access process, and the target base station notifies the source base station to release the UE.
  • the target base station For details of the occupied resources, refer to S108 to S113, and details are not described herein again.
  • S410B The source base station sends a handover cancel (HOover Cancel) message to the target base station to notify the target base station to cancel the handover.
  • HOover Cancel handover cancel
  • the source base station may locally record the abnormal information of the handover for network maintenance, and the recording of the abnormal information may help the source base station to identify the fake base station.
  • the embodiment of the present application further provides a communication device for performing the method performed by the source base station described in the foregoing method embodiment.
  • the device includes a sending unit 501, a processing unit 502, and a receiving unit 503;
  • the processing unit 502 is configured to determine a second base station that needs to be handed over according to a measurement report from a terminal device.
  • the sending unit 501 is configured to send a handover request to the second base station if the processing unit 502 determines that a handover to the second base station is required according to a measurement report from a terminal device.
  • the receiving unit 503 is configured to receive a handover response message from the second base station, where the handover response message includes information about a pilot signal allocated by the second base station to the terminal device.
  • the sending unit 501 is further configured to send a measurement control message to the terminal device, where the measurement control message includes information of the pilot signal.
  • the receiving unit 503 is further configured to receive a measurement response message from the terminal device, where the measurement response message includes a signal quality of the pilot signal.
  • the processing unit is further configured to execute a cell handover process for the terminal device after determining that a signal quality of the pilot signal meets a handover condition.
  • the sending unit 501 may send a handover suspension message to the second base station after the processing unit 502 determines that the signal quality of the pilot signal does not satisfy the handover condition.
  • the processing unit 502 determines the second base station that the terminal device needs to switch, the following three methods may be adopted:
  • the second method is to determine the second base station based on a service request of the terminal device.
  • the third method is to determine the second base station based on a cell's frequency priority.
  • the processing unit 502 can provide the terminal device with a condition that the processing unit 502 can determine that the handover fails. service.
  • the receiving unit 503 may receive a handover request from a third base station; thereafter, the sending unit 501 sends a handover response message to the third base station, and the handover response message includes the first Information of a pilot signal allocated by a base station to a terminal device.
  • the third base station is another base station different from the first base station, and may be a base station to which the terminal device is connected after switching from the first base station, that is, the third base station may be the second base station.
  • the base station may be another base station.
  • the embodiment of the present application further provides a communication device for performing the method performed by the target base station in the foregoing method embodiment.
  • the device includes a receiving unit 601 and a sending unit 602:
  • the receiving unit 601 is configured to receive a handover request from a first base station
  • the sending unit 602 is configured to send a handover response message to the first base station, where the handover response message includes information of a pilot signal allocated by the second base station to the terminal device.
  • the receiving unit 601 may further receive a handover suspension message from the first base station.
  • the embodiment of the present application further provides a communication device for performing the method performed by the global group management network element in the foregoing method embodiment.
  • the device includes a receiving unit 701, a processing unit 702, and a sending unit 703:
  • the receiving unit 701 is configured to receive a measurement control message from the first base station, where the measurement control message is used to instruct the terminal device to perform signal quality of a pilot signal allocated by the second base station to the terminal device. measuring;
  • the processing unit 702 is configured to measure a signal quality of the pilot signal according to the measurement control message
  • the sending unit 703 is configured to send the measurement response message to the first base station, where the measurement response message includes a signal quality of the pilot signal.
  • the sending unit 703 needs to send a measurement report to the first base station.
  • the division of units in the embodiments of the present application is schematic, and is only a logical function division. In actual implementation, there may be another division manner.
  • the functional units in the embodiments of the present application may be integrated into one process. In the device, it may also exist alone physically, or two or more units may be integrated into one module.
  • the above integrated unit may be implemented in the form of hardware or in the form of software functional modules.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially a part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium. It includes several instructions to make a terminal device (which may be a personal computer, a mobile phone, or a network device) or a processor execute all or part of the steps of the method in each embodiment of the present application.
  • the aforementioned storage media include: U disks, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks or compact discs and other media that can store program codes .
  • the group management network element in the first network, the unified data management network element in the first network, and the reception of the global group management network element may divide each functional module in an integrated manner.
  • the "module” herein may refer to a specific ASIC, a circuit, a processor and a memory executing one or more software or firmware programs, an integrated logic circuit, and / or other devices that can provide the above functions.
  • the access processing network element, the registration processing network element in the first network, and the first server may all adopt the form shown in FIG. 8.
  • the communication device 800 shown in FIG. 8 includes at least one processor 801 and a memory 802, and optionally, may further include a communication interface 803.
  • the memory 802 may be a volatile memory, such as a random access memory; the memory may also be a non-volatile memory, such as a read-only memory, a flash memory, a hard disk drive (HDD), or a solid-state drive (solid-state drive, SSD), or memory 802 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to this.
  • the memory 802 may be a combination of the above-mentioned memories.
  • a specific connection medium between the processor 801 and the memory 802 is not limited in the embodiment of the present application.
  • the memory 802 and the processor 801 are connected by a bus 804 in the figure.
  • the bus 804 is indicated by a thick line in the figure.
  • the connection modes between other components are only for illustrative purposes and are not cited. Limited.
  • the bus 804 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used in FIG. 8, but it does not mean that there is only one bus or one type of bus.
  • the processor 801 may have a data transmitting and receiving function, and can communicate with other devices.
  • an independent data transmitting and receiving module such as a communication interface 803, may be provided for transmitting and receiving data. During communication, data can be transmitted through the communication interface 803.
  • the processor 801 in FIG. 8 may call a computer stored in the memory 802 to execute instructions, so that the first base station may execute any one of the foregoing method embodiments. The method performed by the source base station.
  • the function / implementation process of the sending unit, the receiving unit, and the processing unit in FIG. 5 may be implemented by the processor 801 in FIG. 8 calling a computer execution instruction stored in the memory 802.
  • the function / implementation process of the processing unit in FIG. 5 may be implemented by the processor 801 in FIG. 8 calling a computer execution instruction stored in the memory 802
  • the function / implementation process of the sending unit and the receiving unit in FIG. 5 may be implemented by The communication interface 803 in FIG. 8 is implemented.
  • the processor 801 in FIG. 8 may call a computer stored in the memory 802 to execute instructions, so that the second base station may execute any one of the foregoing method embodiments. The method performed by the target base station.
  • the function / implementation process of the receiving unit and the sending unit in FIG. 6 may be implemented by the processor 801 in FIG. 8 calling a computer execution instruction stored in the memory 802.
  • the function / implementation process of the receiving unit and the sending unit in FIG. 6 may be implemented through the communication interface 803 in FIG. 8.
  • the communication device 900 shown in FIG. 9 includes at least one processor 901 and a memory 902, and optionally, may further include a transceiver 903.
  • the memory 902 may be a volatile memory, such as a random access memory; the memory may also be a non-volatile memory, such as a read-only memory, a flash memory, a hard disk drive (HDD), or a solid-state drive (solid-state drive, SSD), or memory 902 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
  • the memory 902 may be a combination of the above-mentioned memories.
  • a specific connection medium between the processor 901 and the memory 902 is not limited in the embodiment of the present application.
  • the memory 902 and the processor 901 are connected by a bus 904 in the figure, and the bus 904 is indicated by a thick line in the figure. Limited.
  • the bus 904 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only a thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.
  • the processor 901 may have a data transmitting and receiving function, and can communicate with other devices.
  • an independent data transmitting and receiving module such as the transceiver 903, may be provided for transmitting and receiving data.
  • the processor 901 is performing communication with other devices. During communication, data can be transmitted through the transceiver 903.
  • the processor 901 in FIG. 9 can call a computer stored in the memory 902 to execute instructions, so that the terminal device can execute the execution performed by the terminal device in any one of the foregoing method embodiments. method.
  • the function / implementation process of the sending unit, the receiving unit, and the processing unit in FIG. 7 may be implemented by the processor 901 in FIG. 9 calling a computer execution instruction stored in the memory 902.
  • the function / implementation process of the processing unit in FIG. 7 may be implemented by the processor 901 in FIG. 9 calling a computer execution instruction stored in the memory 902
  • the function / implementation process of the sending unit and the receiving unit in FIG. 7 may be implemented by The transceiver 903 in FIG. 9 is implemented.
  • the embodiment of the present application further provides a communication system for performing the method of any of the foregoing embodiments.
  • a communication system for performing the method of any of the foregoing embodiments.
  • the communication system includes a first base station and a second base station.
  • the first base station is configured to send a handover request to the second base station when it is determined that a handover to the second base station is required according to a measurement report from a terminal device.
  • the second base station is configured to receive a handover request sent by the first base station; and send a handover response message to the first base station, where the handover response message includes a resource allocated by the second base station to the terminal device; Pilot signal information.
  • the first base station is further configured to receive a handover response message sent by the second base station, and send a measurement control message to the terminal device, where the measurement control message includes information of the pilot signal; and The measurement response message of the terminal device, wherein the measurement response message includes a signal quality of the pilot signal; and if the signal quality of the pilot signal meets a handover condition, performing a cell handover for the terminal device process.
  • the first base station may send a handover suspension message to the second base station.
  • the first base station determines the second base station that the terminal device needs to switch, the following three methods may be adopted:
  • the first base station before the first base station sends a measurement control message to the terminal device, it may be able to provide services to the terminal device in a case where it is determined that a handover fails.
  • the system further includes a third base station; the first base station may receive a handover request from the third base station; and send a handover response message to the third base station, where the handover response message includes the first base station as Information on pilot signals allocated by terminal equipment.
  • this application may be provided as a method, a system, or a computer program product. Therefore, this application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, this application may take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a particular manner such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device, the instructions
  • the device implements the functions specified in one or more flowcharts and / or one or more blocks of the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing device, so that a series of steps can be performed on the computer or other programmable device to produce a computer-implemented process, which can be executed on the computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

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Abstract

一种小区切换的方法、装置及系统，用以解决现有技术中终端设备在执行小区切换时容易接入伪基站的问题。本申请中，第一基站可以向终端设备发送测量控制消息，测量控制消息包括第二基站为所述终端设备分配的导频信号的信息；当第一基站接收来自终端设备的测量响应消息，测量响应消息中包括所述导频信号的信号质量，并在确定所述导频信号的信号质量满足切换条件后，执行针对终端设备的小区切换过程。第一基站先确定终端设备上报的所述导频信号的信号质量满足切换条件，能够有效防止终端设备直接接入伪基站，同时也能够保证终端设备可以成功接入到第二基站，不会掉话。

Description

一种小区切换的方法、装置及系统
本申请要求在2018年08月06日提交中国专利局、申请号为201810885810.8、发明名称为“一种小区切换的方法、装置及系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种小区切换的方法、装置及系统。
背景技术
在小区切换的过程中，终端设备根据从源基站获取的测量控制信息对服务小区及邻小区进行小区测量，之后，所述终端设备将小区测量的测量结果上报给所述源基站，所述源基站根据所述测量结果为所述终端设备选择需要切换的目标基站，之后执行切换过程。
而现有的小区切换过程中，所述终端设备在对服务小区以及邻小区进行小区测量时，并不能识别邻小区中的基站是否为伪基站，所述伪基站为了能够吸附所述终端设备，会仿冒所述邻小区中的基站，使得所述测量结果为针对伪基站的测量结果，而所述源基站也不会对所述终端设备上报的测量结果进行识别，仅是根据所述测量结果为所述终端设备确定目标基站，若所述终端设备上报的测量结果针对伪基站的，则会导致所述源基站根据所述测量结果确定所述邻小区中的基站为目标基站，若所述邻小区中的基站与所述终端设备之间的信号较差，则会导致所述终端设备会无法接入所述邻小区中的基站，切换失败。
发明内容
本申请提供一种小区切换的方法、装置及系统，用以解决现有技术中终端设备在执行小区切换时容易切换失败的问题。
第一方面，本申请实施例提供了一种小区切换的方法，所述方法包括：第一基站在根据来自终端设备的测量报告确定需要切换到第二基站的情况下，可以向所述第二基站发送切换请求，告知所述第二基站所述终端设备需要接入到所述第二基站；之后，所述第一基站会接收到来自所述第二基站的切换响应消息，所述切换响应消息中包括所述第二基站为所述终端设备分配的导频信号的信息；然后，所述第一基站可以向所述终端设备发送测量控制消息，所述测量控制消息用于指示所述终端设备对所述导频信号的信号质量进行测量，所述测量控制消息包括所述导频信号的信息；当所述第一基站接收来自所述终端设备的测量响应消息，所述测量响应消息中包括所述导频信号的信号质量，并在确定所述导频信号的信号质量满足切换条件后，执行针对所述终端设备的小区切换过程。
通过上述方法，所述终端设备在需要切换到第二基站时，所述第一基站并不会直接对所述终端设备执行小区切换，而是先需要确定所述终端设备上报的所述导频信号的信号质量是否满足切换条件，能够保证所述终端设备可以成功接入到所述第二基站，不会掉话，可以保证切换成功。
在一种可能的设计中，所述第一基站在确定所述导频信号的信号质量不满足切换条件后，向所述第二基站发送切换中止消息。
通过上述方法，所述第一基站发送所述切换中止消息，可以告知所述第二基站所述终端设备无法接入，进而可以使得所述第二基站可以不再为所述终端设备预留资源。
在一种可能的设计中，所述第一基站向所述终端设备发送测量控制消息之前，还需要确定切换失败的情况下，能够为所述终端设备提供服务。
通过上述方法，所述第一基站确定所述第一基站仍然可以对所述终端设备提供服务时，才触发所述终端设备对所述导频信号进行测量，能够使得所述终端设备可以在保证业务连续性的前提下，切换到所述第二基站，以防止所述终端设备在对所述导频信号进行测量的过程中，由于所述第一基站无法提供服务导致所述终端设备的掉话现象。
在一种可能的设计中，所述第一基站可以通过如下三种方式确定所述终端设备需要切换的第二基站：
第一种、所述第一基站根据负载均衡策略确定所述终端设备需要切换的第二基站。
第二种、所述第一基站基于所述终端设备的业务请求确定所述第二基站。
第三种、所述第一基站基于小区的频率优先级确定所述第二基站。
通过上述方法，所述第一基站确定所述终端设备需要切换的第二基站更加灵活，能够应用不同的场景中，应用范围更加广泛。
在一种可能的设计中，所述第一基站还可以接收来自第三基站的切换请求，之后再向所述第三基站发送切换响应消息，所述切换响应消息中包括所述第一基站为终端设备分配的导频信号的信息，也就是说，所述第一基站也可以作为所述终端设备或其他终端设备之后需要切换的基站，且可以为终端设备分配导频信号，其中所述第三基站为不同于所述第一基站的基站。
通过上述方法，所述第一基站在作为终端设备后续需要切换的基站时，也可以为终端设备分配导频信息，之后进而触发所述终端设备对所述第一基站为所述终端设备分配的导频信息的测量过程，进一步，可以确保所述终端设备能够成功接入所述第一基站，保证切换的成功率。
第二方面，本申请实施例提供了一种小区切换的方法，所述方法包括：第二基站先接收来自第一基站的切换请求；之后，所述第二基站向所述第一基站发送切换响应消息，所述切换响应消息中包括所述第二基站为所述终端设备分配的导频信号的信息。
通过上述方法，所述第二基站向所述第一基站发送的切换响应消息中一定包括所述第二基站为所述终端设备分配的导频信号的信息，可以触发所述第一基站指示所述终端设备对所述第二基站为所述终端设备分配的导频信号进行测量，进而可以避免所述终端设备切换失败而掉话，同时也可以保证所述终端设备进行小区切换的成功率。
在一种可能的设计中，所述第二基站接收来自所述第一基站的切换中止消息，停止为所述终端设备预留资源。
通过上述方法，通过所述切换中止消息可以及时通知所述第二基站，可以有效节约资源，提高小区切换的效率。
第三方面，本申请实施例提供了一种小区切换的方法，所述方法包括：终端设备可以接收来自所述第一基站的测量控制消息，所述测量控制消息用于指示所述终端设备对第二基站为所述终端设备分配的导频信号的信号质量进行测量，其中，所述测量控制消息包括第二基站为所述终端设备分配的导频信号的信息；并在接收到所述测量控制消息后，所述终端设备根据所述测量控制消息对所述导频信号的信号质量进行测量；在测量结束后，所 述终端设备向所述第一基站发送所述测量响应消息，所述测量响应消息中包括所述导频信号的信号质量。
通过上述方法，所述终端设备并不会直接接入所述第二基站，而是需要先对所述导频信号的信号质量进行测量，能够保证所述终端设备可以成功接入到所述第二基站，不会掉话。
第四方面，本申请实施例还提供了一种通信装置，所述通信装置应用于第一基站，有益效果可以参见第一方面的描述此处不再赘述。该装置具有实现上述第一方面的方法实例中行为的功能。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。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，所述装置的结构中包括接收单元、处理单元和发送单元，这些单元可以执行上述第一方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第五方面，本申请实施例还提供了一种通信装置，所述通信装置应用于第二基站，有益效果可以参见第二方面的描述此处不再赘述。该装置具有实现上述第二方面的方法实例中行为的功能。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。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，所述装置的结构中包括接收单元和发送单元，这些单元可以执行上述第二方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第六方面，本申请实施例还提供了一种通信装置，所述通信装置应用于终端设备，有益效果可以参见第三方面的描述此处不再赘述。该装置具有实现上述第三方面的方法实例中行为的功能。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。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，所述装置的结构中包括接收单元、处理单元和发送单元，这些单元可以执行上述第三方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第七方面，本申请实施例还提供了一种通信装置，所述通信装置应用于第一基站，有益效果可以参见第一方面的描述此处不再赘述。所述通信装置的结构中包括处理器和存储器，所述处理器被配置为支持所述终端执行上述第一方面方法中相应的功能。所述存储器与所述处理器耦合，其保存所述通信装置必要的程序指令和数据。所述通信装置的结构中还包括通信接口，用于与其他设备进行通信。
第八方面，本申请实施例还提供了一种通信装置，所述通信装置应用于第二基站，有益效果可以参见第二方面的描述此处不再赘述。所述通信装置的结构中包括处理器和存储器，所述处理器被配置为支持所述终端执行上述第二方面方法中相应的功能。所述存储器与所述处理器耦合，其保存所述通信装置必要的程序指令和数据。所述通信装置的结构中还包括通信接口，用于与其他设备进行通信。
第九方面，本申请实施例还提供了一种通信装置，所述通信装置应用于终端设备，有益效果可以参见第三方面的描述此处不再赘述。所述通信装置的结构中包括处理器和存储器，所述处理器被配置为支持所述终端执行上述第三方面方法中相应的功能。所述存储器与所述处理器耦合，其保存所述通信装置必要的程序指令和数据。所述通信装置的结构中还包括通信接口，用于与其他设备进行通信。
第十方面，本申请实施例还提供了一种通信系统，有益效果可以参见上个各个方面的描述此处不再赘述，所述通信系统包括第一基站和第二基站。
所述第一基站，用于在根据来自终端设备的测量报告确定需要切换到所述第二基站的情况下，向所述第二基站发送切换请求；
所述第二基站，用于接收所述第一基站发送的切换请求；以及向所述第一基站发送切换响应消息，所述切换响应消息中包括所述第二基站为所述终端设备分配的导频信号的信息；
所述第一基站，还用于接收所述第二基站发送的切换响应消息；以及向所述终端设备发送测量控制消息，所述测量控制消息包括所述导频信号的信息；接收来自所述终端设备的测量响应消息，所述测量响应消息中包括所述导频信号的信号质量；在所述导频信号的信号质量满足切换条件的情况下，执行针对所述终端设备的小区切换过程。
在一种可能的设计中，在所述第一基站确定所述导频信号的信号质量不满足切换条件的情况下，所述第一基站还可以向所述第二基站发送切换中止消息。
在一种可能的设计中，所述第一基站向所述终端设备发送测量控制消息之前，还需要确定切换失败的情况下，能够为所述终端设备提供服务。
在一种可能的设计中，所述第一基站在确定所述终端设备需要切换的第二基站时，具体可采用如下方式：
1、根据负载均衡策略确定所述终端设备需要切换的第二基站。
2、基于所述终端设备的业务请求确定所述第二基站。
3、基于小区的频率优先级确定所述第二基站。
在一种可能的设计中，所述系统还包括第三基站；所述第一基站，还用于接收来自所述第三基站的切换请求；向所述第三基站发送切换响应消息，所述切换响应消息中包括所述第一基站为终端设备分配的导频信号的信息。
第十一方面，本申请还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述各方面所述的方法。
第十二方面，本申请还提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述各方面所述的方法。
第十三方面，本申请还提供一种计算机芯片，所述芯片与存储器相连，所述芯片用于读取并执行所述存储器中存储的软件程序，执行上述各方面所述的方法。
附图说明
图1为一种小区切换的方法示意图；
图2为本申请提供的一种网络架构的结构示意图；
图3为本申请提供的一种小区切换的方法示意图；
图4为本申请提供的一种小区切换的方法示意图；
图5～图9为本申请提供的一种通信装置的结构示意图；
图10为本申请一种通信系统的结构示意图。
具体实施方式
本申请提供了一种小区切换的方法、装置及系统，用以解决现有技术中终端设备在小区切换时较易切换失败的问题。
需要理解的是，在本申请的描述中，“第一”、“第二”、“第三”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序；在本申请实施例中多个指两个或两个以上；在本申请中所述终端设备当前连接的基站为源基站，需要切换到的基站为目标基站，所述源基站所在小区为源小区，所述目标基站所在小区为目标小区。
如图1所示为一种常见的小区切换的方法，主要可以分为三个过程：UE测量过程，切换判决和切换准备过程以及切换执行过程，该方法包括如下步骤：
S101、所述源基站向UE发送测量控制(measurement control)消息；
S102、所述UE接收来自所述源基站的测量控制消息后，根据所述测量控制消息，对服务小区和邻小区的进行测量。
具体的，所述UE可以对服务小区以及邻小区的资源块上发送的信号的信号质量进行测量。
S103、当所述UE对服务小区和邻小区测量的测量结果满足测量上报条件时，所述UE向所述源基站上报测量报告(measurement report，MR)消息。
所述源基站通知所述UE对服务小区和邻小区的进行测量时，会告知所述UE测量上报条件，例如，所述基站会告知所述UE周期性的上报测量结果，所述基站也可以告知所述UE在测量的邻小区的资源块上的发送的信号的信号质量高于某一阈值时上报测量结果，上述测量上报的条件均是举例说明，事实上，测量上报条件均可以根据具体的应用场景进行设定。
S101～S103为UE测量过程，在该过程中，所述UE根据所述源基站下发的测量控制信息对服务小区以及邻小区进行测量，并向所述源基站上报测量结果。
S104、所述源基站基于所述UE的测量结果做出切换判决，为所述UE选择目标基站。
所述源基站可以包括无线资源管理(radio resource management，RRM)模块，所述源基站中的RRM模块用于负责基站的功率控制、基站负载控制、移动性管理以及信道分配等功能。在小区切换过程中，所述源基站中的RRM模块可以根据源基站自身的负载情况、业务的服务质量(quality of service，QOS)要求等结合所述UE上报的测量结果进行判断，确定是否需要将所述UE切换到其他小区。在确定所述UE需要切换到其他小区后，所述源基站可以基于所述UE上报的测量结果为所述UE选择目标小区，例如，所述源基站可以按照小区频点优先级和小区信号质量，从高到底进行筛选，进而选出满足切换条件、频点优先级最高的小区中信号质量最强的小区做为目标小区。
S105、所述源基站向所述目标基站发送切换请求(handover request，HO Request)消息。
S106、所述目标基站接收到所述HO Request消息后，进行切换准入判断，如果允许UE切换到目标小区，则为所述UE分配专用的准入资源。
所述目标基站也可以包括RRM模块，所述RRM模块的相关描述参见前述内容，此处不再赘述，在所述目标基站接收到所述HO Request消息后，所述目标基站中的RRM模块根据所述目标基站自身的负载情况、业务的QOS要求确定是否允许所述UE接入，若允许所述UE接入所述目标小区，则所述目标基站为所述UE分配专用的准入资源，以便所述UE可以根据所述准入资源接入所述目标小区。
S107、所述目标基站向所述源基站发送切换肯定应答(HO Request ACK)消息，所述 HO Request ACK消息中携带所述UE接入目标小区所需的信息。
具体的，所述UE接入目标小区所需的信息包括空口信令面和用户面的承载建立所需的无线资源配置信息。
S104～S107为切换判决和切换准备过程，在该过程中，所述源基站为所述终端设备选择所述目标基站并获取所述终端设备接入所述目标小区所需的信息。
S108、所述源基站向所述UE发送切换指示(HO Command)消息，所述HO Command消息中携带所述UE切换到目标小区所需的信息。
S109、所述UE接收到来自所述源基站的HO Command消息后，开始执行切换。例如，所述UE先中断与所述源基站的连接，之后与所述目标基站建立同步。
S110、所述UE向所述目标基站发送第一随机接入消息(MSG1)，用于请求接入目标小区，其中，所述MSG1携带所述UE为接入所述目标小区选择的前导码(preamble)。
S111、所述目标基站在接收到MSG1后，向所述UE发送第二随机接入消息(MSG2)，所述MSG2中携带上行调度资源信息。
S112、所述UE向所述目标基站发送切换确认(HO Confirm)消息。
所述目标基站在接收到HO Confirm消息后，可以确定所述UE已连接到所述目标小区，完成了小区切换。
S113、所述目标基站接收来自所述UE的HO Confirm消息后，向所述源基站发送终端设备资源释放(UE Resource Release)消息，通知所述源基站释放所述终端设备占用的资源。
S108～S113为切换执行过程，在该过程中，所述UE与所述目标基站执行了随机接入过程，所述目标基站通知所述源基站释放所述UE占用的资源。
从如上的小区切换过程，可以发现在UE测量过程中，所述UE对服务小区以及邻小区进行测量，伪基站会仿冒所述邻小区中真正的基站向所述终端设备发送测量信号，在测量时并不能识别出测试结果是针对自所述邻小区中真正的基站还是针对伪基站，若所述测量结果针对所述伪基站，且所述邻小区中真正的基站与所述UE之间的信号较弱，则会导致在执行小区切换时，所述源基站会根据针对伪基站的测量结果确定所述UE需要切换的基站是所述邻小区中真正的基站，所述UE切换到的所述邻小区中真正的基站后，由于所述邻小区中真正的基站与所述UE之间的信号较差，使得切换失败，进而导致所述UE业务中断、掉话。
为此，本申请实施例提供了一种小区切换的方法、装置及系统，下面将结合附图对本申请作进一步地详细描述。方法实施例中的具体操作方法也可以应用于装置实施例或系统实施例中。
为了方便区别第一基站和第二基站，在本申请方法实施例中将所述第一基站作为当前终端设备连接的基站，为源基站；所述第二基站为所述终端设备需要切换的基站，为目标基站。
实际上，所述第一基站在所述终端设备切换之后，也就是说，所述终端设备与所述第一基站未连接时，所述第一基站也会成为所述终端设备需要切换的基站，也就是说，所述第一基站也可以成为目标基站，在此种情况下，所述第一基站执行的方法可以参见所述第二基站(在本申请实施例中为目标基站)所执行的方法，当然所述第一基站也可能是其他终端设备在进行小区切换时的目标基站，在这种情况下，所述第一基站执行的方法也可以 参见所述第二基站(在本申请实施例中为目标基站)所执行的方法，此处不再赘述。
如图2所示，为本申请的一种可能的网络架构示意图。包括终端设备、源基站和目标基站。所述终端设备通过无线接口与所述源基站、所述目标基站进行通信。所述源基站与所述目标基站之间可以通过有线连接进行通信，如通过X2接口，Xn接口进行通信，或者还可以通过空口的方式进行通信。
在本申请实施例中，所述源基站在确定了所述目标基站之后，向所述目标基站发送切换请求，从所述目标基站获取所述目标基站为所述终端设备分配的导频信号的信息；将所述导频信号的信息携带在测量控制消息中，指示所述终端设备对所述导频信号的信号质量进行测量，并从所述终端设备获取所述导频信号的信号质量，在确定所述导频信号的信号质量满足切换条件后，执行针对所述终端设备的小区切换过程。
所述终端设备可以在接收到所述源基站的测量控制消息后，对所述导频信号的信号质量进行测量，并向所述源基站上报所述导频信号的信号质量。
所述目标基站在接收来自所述源基站的切换请求后，将所述目标基站为所述终端设备分配的导频信号的信息携带在切换响应消息，向所述源基站发送所述切换响应消息。
本申请中的终端设备，又可称之为用户设备(user equipment，UE)，可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。所述终端设备可以是手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线设备、无人驾驶(self driving)中的无线设备、远程医疗(remote medical)中的无线设备、智能电网(smart grid)中的无线设备、运输安全(transportation safety)中的无线设备、智慧城市(smart city)中的无线设备、智慧家庭(smart home)中的无线设备等等。
基站，本申请涉及的基站为源基站和目标基站，是一种为终端设备提供无线通信功能的设备，包括但不限于：5G中的下一代基站(gnodeB，gNB)、演进型节点B(evolved node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved nodeB，或home node B，HNB)、基带单元(BaseBand Unit，BBU)、传输点(transmitting and receiving point，TRP)、发射点(transmitting point，TP)、移动交换中心等。
基于现有的小区切换场景，可以将小区切换的场景分为必要型切换场景以及非必要型切换场景，下面对这两类切换场景进行介绍：
第一类、必要型切换场景。
在这类切换场景中，所述终端设备已经无法继续在所述源小区进行业务，必须进行小区切换，否则会掉话。
例如，由于所述终端设备的移动性，所述终端设备移动范围超出了所述源小区的覆盖范围，为了保证所述终端设备的业务连续性，需要进行小区切换。
又例如，由于当前所述源小区的网络性能变差，上行链路服务质量已低于阈值，无法为所述终端设备提供服务，为了所述终端设备能够继续进行业务，需要进行小区切换。
上述场景仅是举例说明，事实上，必要型切换场景有许多种，此处不再一一列举。
第二类、非必要型切换场景。
在这类切换场景中，所述终端设备需要根据一些网络部署策略或者网络指令进行小区切换，若未切换成功，所述终端设备仍可以在所述源小区进行业务。
例如，当所述源基站的所在的源小区负载过高，为了平衡所述源小区的负载，可以基于负载均衡策略对所述终端设备进行切换。
又例如，为了所述终端设备进行业务的小区网络性能更好，可以在小区切换时，使所述终端设备切换到小区网络性能更好的小区，其中，包括基于业务的切换以及基于频率优先级的切换。
上述场景仅是举例说明，事实上，非必要型切换场景有许多种，此处不再一一列举。
本申请实施例并不限定小区切换的场景，本申请实施例提供的小区切换的方法可以应用在必要型切换场景中，也可以应用于非必要型切换场景中。
在本申请实施例中，所述源基站在确定了目标基站之后，并不会直接将所述终端设备切换到目标小区，而是需要所述终端设备对所述目标基站为所述终端设备分配的导频信号的信号质量进行测量，在所述导频信号的信号质量满足切换条件后，才将对所述终端设备执行切换过程，采用本申请实施例的方式，在确定了目标基站后还需要确定所述目标基站为所述终端设备分配的导频信号的信号质量，以保证所述终端设备在后续切换时可以连接到真正的基站上，进一步能够确保了小区切换的成功，可以避免所述终端设备因为切换失败而造成的掉话。
下面对本申请提供的一种小区切换的方法进行详细介绍，如图3所示，该方法包括：
S301、所述源基站根据来自终端设备的测量报告确定需要切换到的目标基站。
所述源基站在确定所述目标基站时，需要先接收所述终端设备上报的测量报告，所述测量报告是所述终端对服务小区和邻小区的测量结果，所述源基站基于所述测量报告，从邻小区中为所述终端设备选择一个基站作为目标基站，选择的依据可以是根据预设的选择规则，例如选择优先级高或者服务质量好的小区中的基站作为目标基站。
一种可能的实施方式，所述源基站在确定所述目标基站时，可以根据负载均衡策略确定所述终端设备需要切换的目标基站。
若当前所述源基站所在小区的负载过高，为了降低源基站的所在小区的负载，实现负载均衡，可以根据各个小区的负载选择一个负载较小的小区中的基站作为所述目标基站。
另一种可能的实施方式，所述源基站在确定所述目标基站时，可以基于终端设备的业务的服务质量等级标识(QoS Class Identifier，QCI)确定所述目标基站，也可以基于终端设备的业务请求确定所述目标基站，也可以基于小区的频率优先级确定所述目标基站。下面对上述三种确定目标基站的方式进行说明：
第一种、所述源基站基于所述终端设备的QCI确定所述目标基站。
不同QCI的业务，对承载业务的频点的需求不同，所述源基站在确定了QCI业务后，可以将该QCI业务优先建立到该QCI业务期望的某个频点上，进而确定该频点对应的小区中的基站为目标基站。
第二种、所述源基站基于所述终端设备的业务请求确定所述目标基站。
例如当前处于业务分层场景，不同的业务需要在不同的小区执行；又例如，有些小区对一些特定的业务存在限制，如有些小区无LTE网络语音业务(voice over Long Term Evolution，VoLTE)语音业务运营牌照，则不能进行语音业务。
此时，所述源基站可以将所述终端设备切换到允许进行终端设备的业务的小区中，进 而确定所述目标基站，以保证业务的连续性。
第三种、所述源基站基于小区的频率优先级确定所述目标基站。
例如，为了保证所述终端设备的业务能够较大可能的承载在高频段，且保证低频段的空闲，进而保证连续覆盖；基于这一特性，所述源基站可以基于频率优先级确定频段较高的小区，进而确定所述目标基站。
需要说明的是，上述三种确定所述目标基站的方式仅是举例说明，本申请实施例并不限定。
从上述三种可能的实施方式中，可以看出，基于负载均衡策略、终端设备的业务的QCI所述终端设备的业务的QCI或所述终端设备的业务请求确定所述目标基站的方式均属于非必要型切换场景下的小区切换；也就是说，所述源基站在非必要型切换场景下，可以采用本申请实施例提供的小区切换方法，而上述两种可能的实施方式也仅是举例说明，事实上，在其他非必要型切换场景本申请实施例提供的小区切换的方法也适用，当然，在必要型切换场景，也可以采用本申请实施例提供的小区切换的方法，本申请并不限定。
通过上述两种可能实施方式，使得所述源基站采用较为灵活的方式确定所述目标基站，也可以使得所述终端设备可以在切换后更好的进行业务。
S302、所述源基站在确定所述终端设备需要切换的目标基站后，向所述目标基站发送切换请求。
S303、所述目标基站接收来自所述源基站的切换请求，并在接收来自所述源基站的切换请求后，向所述源基站发送切换响应消息，所述切换响应消息中包括所述目标基站为所述终端设备分配的导频信号的信息。
所述源基站在确定了所述目标基站后，需要向所述目标基站发送切换请求，以通知所述目标基站所述终端设备需要进行小区切换。而所述目标基站在接收到所述切换请求后，若同意所述终端设备接入，则会向所述源基站发送切换响应消息，并且所述切换响应消息中携带所述目标基站为所述终端设备分配的导频信号的信息。
其中，所述目标基站为所述终端设备分配的导频信号是所述目标基站为所述终端设备分配的用户级的导频信号，为所述终端设备独有，且所述导频信号的信息是通过安全的通道发送给所述终端设备的，只有所述终端设备可以获取。
具体的，所述导频信号的信息可以是所述导频信号的标识信息，也可以是其他标识信息，本申请并不限定所述导频信号的信息的类型，凡事能够使得所述源基站可以确定所述导频信号的信息均适用于本申请实施例。
所述切换响应消息中包括所述导频信号的信息，可以使所述源基站触发所述终端设备对所述导频信号的信号质量进行测量，而不是直接使所述终端设备接入所述目标小区，可以确保所述目标基站不是伪基站，进一步保证所述终端设备能够成功切换至所述目标小区，可以保证所述终端设备在进行小区切换后不会掉话，继续业务。
S304、所述源基站接收到来自所述目标基站的切换响应消息，向所述终端设备发送测量控制消息，所述测量控制消息包括所述导频信号的信息，所述测量控制信息可用于指示所述终端设备对所述导频信号的信号质量进行测量。
所述源基站在接收到所述目标基站的切换响应消息后，确定所述目标基站允许所述终端设备接入，则向所述终端发送所述测量控制消息，指示所述终端设备对所述导频信号的信号质量进行测量，所述测量控制消息中携带所述导频信号的信息。
其中，本申请并不限定所述测量控制消息指示所述终端设备对所述导频信号的信号质量进行测量的方式，例如，可以在所述测量控制消息中增加信元，所述信元指示述终端设备对所述导频信号的信号质量进行测量，也可以设置所述测量控制消息的消息类型，所述消息类型为指示测量信号质量的消息类型，只要所述终端设备在接收到该种消息类型的所述测量控制消息可以确定需要对所述导频信号的信号质量进行测量，也可以采用其他方式，本申请实施例并不限定，凡是可以指示所述终端设备对所述导频信号的信号质量进行测量的方式均适用于本申请实施例。
可选的，所述源基站向所述终端设备发送测量控制消息之前，可以先确定若所述终端设备切换失败，所述源基站仍可以为所述终端设备提供服务，也就是说，在非必要型切换场景下，所述源基站可以向所述终端设备发送所述测量控制消息。
若当前处于必要型切换场景，所述源基站已无法为所述终端设备继续提供服务，所述终端设备存在掉话的可能性，为了避免所述终端设备业务中断，可以直接针对所述终端设备执行切换过程，而不需要向所述终端设备发送测量控制消息，触发所述终端设备对所述导频信号的测量过程。
S305、所述终端设备接收来自所述源基站的测量控制消息，所述终端设备根据所述测量控制消息对所述导频信号的信号质量进行测量。
所述终端设备接收来自所述源基站的测量控制消息后，确定需要对所述导频信号的信号质量进行测量，之后，根据所述测量控制消息中携带的所述导频信号的信息接收所述导频信号，对所述导频信号的信号质量进行测量。
所述测量控制消息中还可以包括所述导频信号对应的时频资源信息，所述终端设备在接到所述测量控制信息后，可以在所述导频信号对应的时频资源上接收所述导频信号。
所述终端设备对所述导频信号的信号质量进行测量，可以通过所述导频信号的参考信号接收功率(reference signal received power，RSRP)或者参考信号接收质量(reference signal received quality，RSRQ)反映所述导频信号的信号质量。上述测量所述导频信号的信号质量的方法均是举例说明，事实上，所述终端设备还可以通过测量所述导频信号的信息其他属性反映所述导频信号的信号质量，本申请实施例并不限定。
所述终端设备在对所述导频信号的信号质量进行测量后，可以直接执行步骤306，也可以先对测量确定的所述导频信号的信号质量进行进一步的确定，在确定满足上报条件后，再执行步骤306。
一种可能的实施方式中，上报条件可以是所述导频信号的信号质量大于设定阈值，也就是说，当所述导频信号的信号质量大于设定阈值，则执行步骤306，否则不执行步骤306，在不满足上报条件时，也可以向所述源基站发送通知消息，告知所述源基站所述导频信号的信号质量不满足条件，触发所述源基站为所述终端设备重新选择目标基站。
S306、所述终端设备向所述源基站发送所述测量响应消息，所述测量响应消息中包括所述导频信号的信号质量。
所述终端设备在对所述导频信号的信号质量进行测量之后，可以向所述源基站发送所述测量响应消息，在所述测量响应消息中携带所述终端设备对所述导频信号的信号质量进行测量后得到的测量结果。
S307、所述源基站接收来自所述终端设备的测量响应消息，确定所述导频信号的信号质量是否满足切换条件。
具体的，所述切换条件有许多种，例如所述切换条件为所述导频信号的信号质量大于第一阈值，当所述导频信号的信号质量大于第一阈值，则执行步骤308，否则不执行小区切换；又例如，所述切换条件为所述导频信号的信号质量与所述源基站的小区参考信号的信号质量的差值大于第二阈值，当所述导频信号的信号质量与所述源基站的小区参考信号的信号质量的差值大于第二阈值，则执行步骤308，否则不执行小区切换，上述两种切换条件仅是举例说明，事实上，本申请实施例并不限定所述切换条件，在具体实施中，可以根据场景，进行设置。
S308、所述源基站在确定所述导频信号的信号质量满足切换条件后，执行针对所述终端设备的小区切换过程。
所述源基站若确定所述导频信号的信号质量满足切换条件，则说明所述终端设备可以切换到所述目标小区，则开始执行针对所述终端设备的小区切换过程，所述执行针对所述终端设备的小区切换过程可以参见图1所示的实施例中S108～S113的切换执行过程，此处不再赘述。
所述源基站若确定所述导频信号的信号质量不满足切换条件后，向所述目标基站发送切换中止消息。
所述源基站若确定所述导频信号的信号质量不满足切换条件，则说明所述终端设备无法切换到所述目标基站所在小区，所述源基站需要告知所述目标基站切换取消，向所述目标基站发送切换中止消息。所述目标基站在接收到来自所述源基站的切换中止消息后，可以确定所述终端设备无法切换，不需要为所述终端设备分配资源。
所述源基站还可以向所述终端设备发生切换失败消息，通知所述终端设备无法切换至所述目标基站。
如图3所示的小区切换的方法可以与现有技术中小区切换的方法结合，下面通过一个具体的实施例将本申请中小区切换的方法可以与现有技术中小区切换的方法结合对如图3所示的实施例进行进一步说明。
如图4所示，为本申请实施例提供的另一种小区切换的方法，以所述目标基站为所述终端设备分配的导频信号为信道状态信息参考信号(channel state information reference signal，CSI-RS)，测量响应消息为第二MR消息为例进行说明，该方法包括：
S401、所述源基站向UE下发第一测量控制(measurement control)信息；
S402、所述UE接收来自所述源基站的第一测量控制信息，根据所述第一测量控制信息对服务小区和邻小区的测量。当测量结果满足测量上报条件时，所述UE向所述源基站发送第一MR消息。
S401～S402为UE测量过程，具体执行过程可参见S101～S103，此处不再赘述。
S403、与S104相同，可参见前述内容，此处不再赘述。
S404、与S105相同，可参见前述内容，此处不再赘述。
S405、所述目标基站向所述源基站发送HO Request ACK消息，所述HO Request ACK消息中包括所述UE接入目标小区所需的信息，还包括所述目标基站为所述UE分配的CSI-RS的信息。
S406、所述源基站向所述UE发送第二测量控制消息，所述第二测量控制消息中包括所述目标基站为所述UE分配的CSI-RS的信息。
所述源基站在接收到所述HO Request ACK消息后，若所述HO Request ACK消息中包 括CSI-RS信息，则可以触发所述终端设备进行二次测量、以及所述源基站进行再次判决过程。
需要说明的是，二次测量指进行对所述CSI-RS的信号质量的测量，由于在如图4所示的实施例中所述终端设备在S402已经进行了一次对服务小区和邻小区的测量，故将对所述CSI-RS的信号质量的测量称为二次测量；相应的，再次判决过程指所述源基站基于对所述CSI-RS的信号质量的测量结果的判决过程，由于在S403所述源基站基于所述终端设备上报的测量结果已经进行了一次切换判决，故此处将所述源基站对所述CSI-RS的信号质量的测量结果的判决称为再次判决。
所述源基站也可以在所述HO Request ACK消息中包括CSI-RS信息的情况下，且当前小区切换的场景为非必要型小区切换场景，触发所述终端设备进行二次测量、以及所述源基站进行再次判决过程。
S407、所述UE接收来自所述源基站的第二测量控制消息，之后，根据所述第二测量控制消息对所述CSI-RS的信号质量进行测量。
S408、所述UE向所述源基站发送第二MR消息，所述第二MR消息中包括所述UE对所述CSI-RS的信号质量进行测量的测量结果，也就是说，所述第二MR消息中包括所述CSI-RS的信号质量。
S409、所述源基站接收到来自所述UE的第二MR消息后，所述源基站根据所述第二MR消息进行切换判决，确定所述CSI-RS的信号质量是否满足切换条件。
若所述CSI-RS信号质量,满足切换条件则执行S410A。
S410A、所述源基站针对所述终端设备执行小区切换过程，在该过程中，所述UE与所述目标基站执行了随机接入过程，并且所述目标基站通知所述源基站释放所述UE占用的资源，具体可参见S108～S113，此处不再赘述。
若所述CSI-RS信号质量不满足切换条件，则执行S410B。
S410B、所述源基站向所述目标基站发送切换中止(handover cancel，HO cancel)消息，告知所述目标基站取消切换。
可选的，所述源基站可以在本地记录此次切换的异常信息，用于网络维护，异常信息的记录有助于所述源基站对伪基站的进行识别。
基于与方法实施例同一发明构思，本申请实施例还提供了一种通信装置，用于执行上述方法实施例中所述源基站执行的方法，相关特征可参见上述方法实施例，此处不再赘述，如图5所示，该装置包括和发送单元501、处理单元502以及接收单元503；
所述处理单元502，用于根据来自终端设备的测量报告确定需要切换的第二基站。
所述发送单元501，用于在所述处理单元502根据来自终端设备的测量报告确定需要切换到所述第二基站的情况下，向所述第二基站发送切换请求。
所述接收单元503，用于接收到来自所述第二基站的切换响应消息，所述切换响应消息中包括所述第二基站为所述终端设备分配的导频信号的信息。
所述发送单元501，还用于向所述终端设备发送测量控制消息，所述测量控制消息包括所述导频信号的信息。
所述接收单元503，还用于接收来自所述终端设备的测量响应消息，所述测量响应消息中包括所述导频信号的信号质量。
所述处理单元，还用于在确定所述导频信号的信号质量满足切换条件后，执行针对所 述终端设备的小区切换过程。
可选的，所述发送单元501可以在所述处理单元502确定所述导频信号的信号质量不满足切换条件后，向所述第二基站发送切换中止消息。
具体的，当所述处理单元502确定所述终端设备需要切换的第二基站，可采用如下三种方式：
第一种、根据负载均衡策略确定所述终端设备需要切换的第二基站。
第二种、基于所述终端设备的业务请求确定所述第二基站。
第三种、基于小区的频率优先级确定所述第二基站。
一种可能的实施方式中，所述处理单元502在所述发送单元501向所述终端设备发送测量控制消息之前，所述处理单元502可以确定切换失败的情况下，能够为所述终端设备提供服务。
在所述终端设备切换后，所述接收单元503可以接收来自第三基站的切换请求；之后所述发送单元501向所述第三基站发送切换响应消息，所述切换响应消息中包括所述第一基站为终端设备分配的导频信号的信息。
其中，所述第三基站为不同第一基站的其他基站，可以是所述终端设备从所述第一基站切换后连接的基站，也就说是，所述第三基站可以是所述第二基站，也可以是其他基站。
基于与方法实施例同一发明构思，本申请实施例还提供了一种通信装置，用于执行上述方法实施例中目标基站执行的方法，相关特征可参见上述方法实施例，此处不再赘述，如图6所示，该装置包括接收单元601和发送单元602：
所述接收单元601，用于接收来自第一基站的切换请求；
所述发送单元602，用于向所述第一基站发送切换响应消息，所述切换响应消息中包括所述第二基站为所述终端设备分配的导频信号的信息。
可选的，所述接收单元601还可以接收来自所述第一基站的切换中止消息。
基于与方法实施例同一发明构思，本申请实施例还提供了一种通信装置，用于执行上述方法实施例中全局群组管理网元执行的方法，相关特征可参见上述方法实施例，此处不再赘述，如图7所示，该装置包括接收单元701、处理单元702和发送单元703：
所述接收单元701，用于接收来自所述第一基站的测量控制消息，所述测量控制消息用于指示所述终端设备对第二基站为所述终端设备分配的导频信号的信号质量进行测量；
所述处理单元702，用于根据所述测量控制消息对所述导频信号的信号质量进行测量；
所述发送单元703，用于向所述第一基站发送所述测量响应消息，所述测量响应消息中包括所述导频信号的信号质量。
可选的，所述发送单元703在所述接收单元701接收来自所述第一基站的测量控制消息之前，还需要向所述第一基站发送测量报告。
本申请实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，另外，在本申请各个实施例中的各功能单元可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上单元集成在一个模块中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
该集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出 来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台终端设备(可以是个人计算机，手机，或者网络设备等)或处理器(processor)执行本申请各个实施例该方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
在本申请实施例中，所述第一网络中的群组管理网元、第一网络中的统一数据管理网元、所述全局群组管理网元接收均可以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。
在一个简单的实施例中，本领域的技术人员可以想到所述接入处理网元、所述第一网络中的注册处理网元和所述第一服务器均可采用图8所示的形式。
如图8所示的通信装置800，包括至少一个处理器801、存储器802，可选的，还可以包括通信接口803。
存储器802可以是易失性存储器，例如随机存取存储器；存储器也可以是非易失性存储器，例如只读存储器，快闪存储器，硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)、或者存储器802是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器802可以是上述存储器的组合。
本申请实施例中不限定上述处理器801以及存储器802之间的具体连接介质。本申请实施例在图中以存储器802和处理器801之间通过总线804连接，总线804在图中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。该总线804可以分为地址总线、数据总线、控制总线等。为便于表示，图8中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
处理器801可以具有数据收发功能，能够与其他设备进行通信，在如图8装置中，也可以设置独立的数据收发模块，例如通信接口803，用于收发数据；处理器801在与其他设备进行通信时，可以通过通信接口803进行数据传输。
当所述第一基站采用图8所示的形式时，图8中的处理器801可以通过调用存储器802中存储的计算机执行指令，使得所述第一基站可以执行上述任一方法实施例中的所述源基站执行的方法。
具体的，图5中的发送单元、接收单元和处理单元的功能/实现过程均可以通过图8中的处理器801调用存储器802中存储的计算机执行指令来实现。或者，图5中的处理单元的功能/实现过程可以通过图8中的处理器801调用存储器802中存储的计算机执行指令来实现，图5中的发送单元和接收单元的功能/实现过程可以通过图8中的通信接口803来实现。
当所述第二基站采用图8所示的形式时，图8中的处理器801可以通过调用存储器802中存储的计算机执行指令，使得所述第二基站可以执行上述任一方法实施例中的目标基站执行的方法。
具体的，图6中的接收单元和发送单元的功能/实现过程均可以通过图8中的处理器801调用存储器802中存储的计算机执行指令来实现。或者，图6中的接收单元、发送单元的功能/实现过程可以通过图8中的通信接口803来实现。
如图9所示的通信装置900，包括至少一个处理器901、存储器902，可选的，还可以包括收发器903。
存储器902可以是易失性存储器，例如随机存取存储器；存储器也可以是非易失性存储器，例如只读存储器，快闪存储器，硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)、或者存储器902是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器902可以是上述存储器的组合。
本申请实施例中不限定上述处理器901以及存储器902之间的具体连接介质。本申请实施例在图中以存储器902和处理器901之间通过总线904连接，总线904在图中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。该总线904可以分为地址总线、数据总线、控制总线等。为便于表示，图9中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
处理器901可以具有数据收发功能，能够与其他设备进行通信，在如图9装置中，也可以设置独立的数据收发模块，例如收发器903，用于收发数据；处理器901在与其他设备进行通信时，可以通过收发器903进行数据传输。
当终端设备采用图9所示的形式时，图9中的处理器901可以通过调用存储器902中存储的计算机执行指令，使得所述终端设备可以执行上述任一方法实施例中的终端设备执行的方法。
具体的，图7中的发送单元、接收单元和处理单元的功能/实现过程均可以通过图9中的处理器901调用存储器902中存储的计算机执行指令来实现。或者，图7中的处理单元的功能/实现过程可以通过图9中的处理器901调用存储器902中存储的计算机执行指令来实现，图7中的发送单元和接收单元的功能/实现过程可以通过图9中的收发器903来实现。
基于与方法实施例同一发明构思，本申请实施例还提供了一种通信系统，用于执行上述任一实施例的方法，相关特征可参见上述方法实施例，此处不再赘述。
本申请实施例提供的一种通信系统的结构示意图可参见图10，具体的，所述通信系统包括第一基站和第二基站。
具体的，所述第一基站，用于在根据来自终端设备的测量报告确定需要切换到所述第二基站的情况下，向所述第二基站发送切换请求。
所述第二基站，用于接收所述第一基站发送的切换请求；以及向所述第一基站发送切换响应消息，所述切换响应消息中包括所述第二基站为所述终端设备分配的导频信号的信息。
所述第一基站，还用于接收所述第二基站发送的切换响应消息，以及向所述终端设备发送测量控制消息，所述测量控制消息包括所述导频信号的信息；以及接收来自所述终端设备的测量响应消息，所述测量响应消息中包括所述导频信号的信号质量；以及在所述导频信号的信号质量满足切换条件的情况下，执行针对所述终端设备的小区切换过程。
可选的，所述第一基站还可以在确定所述导频信号的信号质量不满足切换条件后，向所述第二基站发送切换中止消息。
具体的，所述第一基站在确定所述终端设备需要切换的第二基站时，可采用如下三种方式：
1、根据负载均衡策略确定所述终端设备需要切换的第二基站。
2、基于所述终端设备的业务请求确定所述第二基站。
3、基于小区的频率优先级确定所述第二基站。
可选的，所述第一基站向所述终端设备发送测量控制消息之前，还可以确定切换失败的情况下，能够为所述终端设备提供服务。
所述系统还包括第三基站；所述第一基站可以接收来自所述第三基站的切换请求；向所述第三基站发送切换响应消息，所述切换响应消息中包括所述第一基站为终端设备分配的导频信号的信息。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (34)

  1. 一种小区切换的方法，其特征在于，所述方法包括：
    第一基站在根据来自终端设备的测量报告确定需要切换到第二基站的情况下，向所述第二基站发送切换请求；
    所述第一基站接收到来自所述第二基站的切换响应消息，所述切换响应消息中包括所述第二基站为所述终端设备分配的导频信号的信息；
    所述第一基站向所述终端设备发送测量控制消息，所述测量控制消息包括所述导频信号的信息；
    所述第一基站接收来自所述终端设备的测量响应消息，所述测量响应消息中包括所述导频信号的信号质量；
    在所述导频信号的信号质量满足切换条件的情况下，所述第一基站执行针对所述终端设备的小区切换过程。
  2. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    在所述导频信号的信号质量不满足切换条件的情况下，所述第一基站向所述第二基站发送切换中止消息。
  3. 如权利要求1或2所述的方法，其特征在于，所述第一基站向所述终端设备发送测量控制消息之前，还包括：
    所述第一基站确定切换失败的情况下，能够为所述终端设备提供服务。
  4. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    所述第一基站确定需要切换到的所述第二基站。
  5. 如权利要求4所述的方法，其特征在于，所述第一基站确定需要切换的所述第二基站，包括：
    所述第一基站根据负载均衡策略确定所述终端设备需要切换的所述第二基站；或
    所述第一基站基于所述终端设备的业务请求确定所述第二基站；或
    所述第一基站基于小区的频率优先级确定所述第二基站。
  6. 如权利要求1所述的方法，其特征在于，所述第一基站执行针对所述终端设备的小区切换过程之后，还包括：
    所述第一基站接收来自第三基站的切换请求；
    所述第一基站向所述第三基站发送切换响应消息，所述切换响应消息中包括所述第一基站为终端设备分配的导频信号的信息。
  7. 一种小区切换的方法，其特征在于，所述方法包括：
    第二基站接收来自第一基站的切换请求；
    所述第二基站向所述第一基站发送切换响应消息，所述切换响应消息中包括所述第二基站为所述终端设备分配的导频信号的信息。
  8. 如权利要求7所述的方法，其特征在于，所述方法还包括：
    所述第二基站接收来自所述第一基站的切换中止消息，停止为所述终端设备预留资源。
  9. 一种小区切换的方法，其特征在于，所述方法包括：
    终端设备接收来自所述第一基站的测量控制消息，所述测量控制消息包括第二基站为所述终端设备分配的导频信号的信息；
    所述终端设备根据所述测量控制消息对所述导频信号的信号质量进行测量；
    所述终端设备向所述第一基站发送所述测量响应消息，所述测量响应消息中包括所述导频信号的信号质量。
  10. 如权利要求9所述的方法，其特征在于，所述终端设备接收来自所述第一基站的测量控制消息之前，还包括：
    所述终端设备向所述第一基站发送测量报告。
  11. 一种通信装置，其特征在于，所述通信装置包括发送单元、处理单元以及接收单元：
    所述发送单元，用于在根据来自终端设备的测量报告确定需要切换到第二基站的情况下，向所述第二基站发送切换请求；
    所述接收单元，用于接收到来自所述第二基站的切换响应消息，所述切换响应消息中包括所述第二基站为所述终端设备分配的导频信号的信息；
    所述发送单元，还用于向所述终端设备发送测量控制消息，所述测量控制消息包括所述导频信号的信息；
    所述接收单元，还用于接收来自所述终端设备的测量响应消息，所述测量响应消息中包括所述导频信号的信号质量；
    所述处理单元，还用于在确定所述导频信号的信号质量满足切换条件的情况下，执行针对所述终端设备的小区切换过程。
  12. 如权利要求11所述的通信装置，其特征在于，所述发送单元，还用于在确定所述导频信号的信号质量不满足切换条件的情况下，向所述第二基站发送切换中止消息。
  13. 如权利要求11所述的通信装置，其特征在于，所述处理单元在所述发送单元向所述终端设备发送测量控制消息之前，还用于：
    确定切换失败的情况下，能够为所述终端设备提供服务。
  14. 如权利要求11所述的通信装置，其特征在于，所述处理单元，还用于确定需要切换到的所述第二基站。
  15. 如权利要求11所述的通信装置，其特征在于，所述处理单元，用于确定需要切换到的所述第二基站，具体为：
    根据负载均衡策略确定所述终端设备需要切换的所述第二基站；或
    基于所述终端设备的业务请求确定所述第二基站；或
    基于小区的频率优先级确定所述第二基站。
  16. 如权利要求11所述的通信装置，其特征在于，
    所述接收单元，还用于接收来自第三基站的切换请求；
    所述发送单元，还用于向所述第三基站发送切换响应消息，所述切换响应消息中包括所述第一基站为终端设备分配的导频信号的信息。
  17. 一种通信装置，其特征在于，所述通信装置包括接收单元以及发送单元：
    所述接收单元，用于接收来自第一基站的切换请求；
    所述发送单元，用于向所述第一基站发送切换响应消息，所述切换响应消息中包括所述第二基站为所述终端设备分配的导频信号的信息。
  18. 如权利要求17所述的通信装置，其特征在于，所述通信装置还包括处理单元；
    所述接收单元，还用于接收来自所述第一基站的切换中止消息；
    所述处理单元，用于在所述接收单元接收到所述切换中止消息后，停止为所述终端设备预留资源。
  19. 一种通信装置，其特征在于，所述通信装置包括接收单元、处理单元以及发送单元：
    所述接收单元，用于接收来自所述第一基站的测量控制消息，所述测量控制消息包括第二基站为所述终端设备分配的导频信号的信息；
    所述处理单元，用于根据所述测量控制消息对所述导频信号的信号质量进行测量；
    所述发送单元，用于向所述第一基站发送所述测量响应消息，所述测量响应消息中包括所述导频信号的信号质量。
  20. 如权利要求19所述的通信装置，其特征在于，所述发送单元在所述接收单元接收来自所述第一基站的测量控制消息之前，还用于：
    向所述第一基站发送测量报告。
  21. 一种通信装置，其特征在于，所述通信装置包括处理器和存储器；
    所述存储器用于存储计算机执行指令，当所述通信装置运行时，所述处理器执行所述存储器存储的所述计算机执行指令，以使所述通信装置执行如权利要求1-6任一所述的方法。
  22. 一种通信装置，其特征在于，所述通信装置包括处理器和存储器；
    所述存储器用于存储计算机执行指令，当所述通信装置运行时，所述处理器执行所述存储器存储的所述计算机执行指令，以使所述通信装置执行如权利要求7-8任一所述的方法。
  23. 一种通信装置，其特征在于，所述通信装置包括处理器和存储器；
    所述存储器用于存储计算机执行指令，当所述通信装置运行时，所述处理器执行所述存储器存储的所述计算机执行指令，以使所述通信装置执行如权利要求9-10任一所述的方法。
  24. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行如权利要求1至6中任一项所述的方法。
  25. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行如权利要求7至8中任一项所述的方法。
  26. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行如权利要求9至10中任一项所述的方法。
  27. 一种计算机芯片，其特征在于，所述芯片与存储器相连，所述芯片用于读取并执行所述存储器中存储的软件程序，执行如权利要求1到10任一项所述的方法。
  28. 一种包含指令的计算机程序产品，其特征在于，当其在计算机上运行时，使得计算机执行如权利要求1到10任一项所述的方法。
  29. 一种通信系统，其特征在于，所述通信系统包括第一基站和第二基站；
    所述第一基站，用于在根据来自终端设备的测量报告确定需要切换到所述第二基站的情况下，向所述第二基站发送切换请求；
    所述第二基站，用于接收所述第一基站发送的切换请求；以及向所述第一基站发送切换响应消息，所述切换响应消息中包括所述第二基站为所述终端设备分配的导频信号的信息；
    所述第一基站，还用于接收所述第二基站发送的切换响应消息，以及向所述终端设备发送测量控制消息，所述测量控制消息包括所述导频信号的信息；以及接收来自所述终端设备的测量响应消息，所述测量响应消息中包括所述导频信号的信号质量；以及在所述导频信号的信号质量满足切换条件的情况下，执行针对所述终端设备的小区切换过程。
  30. 如权利要求29所述的通信系统，其特征在于，所述第一基站还用于：
    在确定所述导频信号的信号质量不满足切换条件的情况下，向所述第二基站发送切换中止消息。
  31. 如权利要求29所述的通信系统，其特征在于，所述第一基站向所述终端设备发送测量控制消息之前，还用于：
    确定切换失败的情况下，能够为所述终端设备提供服务。
  32. 如权利要求29所述的通信系统，其特征在于，所述第一基站，还用于根据来自所述终端设备的测量报告确定需要切换到的所述第二基站。
  33. 如权利要求30所述的通信系统，其特征在于，所述第一基站在确定需要切换的所述第二基站，具体用于：
    根据负载均衡策略确定所述终端设备需要切换的所述第二基站；或
    基于所述终端设备的业务请求确定所述第二基站；或
    基于小区的频率优先级确定所述第二基站。
  34. 如权利要求29～33任一所述的通信系统，其特征在于，所述系统还包括第三基站；
    所述第一基站，还用于接收来自所述第三基站的切换请求；向所述第三基站发送切换响应消息，所述切换响应消息中包括所述第一基站为终端设备分配的导频信号的信息。
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EP3826352A4 (en) 2021-09-15

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