CN116669119B

CN116669119B - Method and apparatus for cell handover

Info

Publication number: CN116669119B
Application number: CN202211699579.6A
Authority: CN
Inventors: 杨飞
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2024-04-19
Anticipated expiration: 2042-12-28
Also published as: CN116669119A

Abstract

A method and a device for cell switching are applied to the field of communication. The method comprises the following steps: the terminal equipment receives a B1 measurement event from the access network equipment; acquiring a first measurement result, wherein the first measurement result refers to a measurement result of the signal quality of a current resident service cell; measuring the neighbor cell to obtain a second measurement result, wherein the second measurement result refers to the measurement result of the signal quality of the neighbor cell; reporting a B1 measurement report when the first measurement result meets a first preset condition and the second measurement result meets a second preset condition; and when the first measurement result does not meet the first preset condition and/or the second measurement result does not meet the second preset condition, not reporting the B1 measurement report. Thus, when the terminal equipment is in a cell with good coverage signal, if the first measurement event is missent due to the abnormality of the access network equipment, the terminal equipment can be prevented from being switched from a service cell with good signal quality to a cell with poor signal quality, and the abnormality of the terminal service is prevented.

Description

Method and apparatus for cell handover

Technical Field

The present application relates to the field of communications, and in particular, to a method and apparatus for cell handover.

Background

Cell handover refers to a procedure when a terminal device is handed over from a current serving cell to other target cells, such as neighbor cells. Before cell switching, the base station issues a B1 measurement event to the terminal device to measure the signal quality of the neighbor cell.

However, when the base station is abnormal, the base station may missend a B1 measurement event to the terminal device even if the signal coverage of the current serving cell of the terminal device is good, for example, the terminal device resides in a New Radio (NR) network with better signal. If the B1 reporting threshold is met, the terminal equipment reports a B1 measurement report to the base station. After the terminal equipment reports the B1 measurement report to the base station, the base station then issues a switching command, so that the terminal equipment is switched from an NR network with good current coverage signals to a network with poor signals (long term evolution (long term evolution, LTE)), and the service abnormality of the terminal equipment, such as call drop, slow data network speed and the like, is caused, so that the user experience is seriously affected.

Disclosure of Invention

In view of the foregoing, the present application provides a communication method, a communication apparatus, a computer readable storage medium, and a computer program product, which can ensure that a terminal device resides in a cell with better signal quality, thereby improving service experience of the terminal device.

In a first aspect, a communication method is provided, which may be performed, for example, by a terminal device, or may also be performed by a component (such as a circuit, chip or chip system, etc.) arranged in the terminal device. The application is not limited in this regard.

Specifically, the communication method includes: firstly, a terminal device receives a first measurement event from an access network device, wherein the first measurement event is used for measuring the signal quality of a neighbor cell; then, a first measurement result is obtained, wherein the first measurement result refers to a measurement result of the signal quality of a serving cell where the terminal equipment currently resides; the terminal equipment measures the neighbor cells of the terminal equipment according to the first measurement event to obtain a second measurement result, wherein the second measurement result is a measurement result of the signal quality of the neighbor cells; and reporting a measurement report of the first measurement event to the access network equipment when the first measurement result meets a first preset condition and the second measurement result meets a second preset condition.

Based on the technical scheme, after receiving a first measurement event (B1 measurement event) issued by the access network equipment, the terminal equipment acquires a first measurement result of the signal quality of the current service cell, measures the neighbor cell according to the first measurement event to acquire a second measurement result, and reports a measurement report of the first measurement event when the first measurement result and the second measurement result meet a threshold condition. That is, after measuring the signal quality of the neighbor cell, the signal quality of the current serving cell needs to be considered, so as to determine whether to report the measurement report of the first measurement event, so that the following situations can be avoided: after the access network equipment missends the B1 measurement event due to abnormality, the terminal equipment is switched from a cell with better signal coverage to a cell with worse signal coverage. For the situation that the signal quality of the service cell where the terminal equipment currently resides is good, if the first measurement event is wrongly issued due to the abnormality of the access network equipment, the effect of the embodiment of the application is more remarkable, and the service experience of the terminal equipment is ensured.

Optionally, the serving cell of the terminal device is an NR cell, and the neighbor cell is an LTE cell. Therefore, when the terminal equipment resides in a cell under the NR network with better coverage signal, the terminal equipment can be prevented from being switched from the NR cell with better coverage signal to the LTE cell with poor signal.

In some possible implementations, the method further includes:

And when the first measurement result does not meet a first preset condition and/or the second measurement result does not meet the second preset condition, not reporting a measurement report of the first measurement event or continuing to reside in the service cell.

That is, in the case where the reporting condition of the embodiment of the present application is not satisfied, the terminal device does not report the measurement report of the first measurement event. If the terminal equipment does not report the measurement report of the first measurement, the access network equipment does not issue a switching command, and the terminal equipment continues to reside in the current service cell for communication, so that communication service can be continuously executed under the network with better signal coverage, abnormal conditions of service, such as call drop, interruption, silence, data service interruption and the like, are avoided, and user communication experience is improved.

In some possible implementations, the first measurement result satisfies a first preset condition, including: the reference signal received power, RSRP, value of the serving cell is less than or equal to the first RSRP threshold and/or the reference signal received quality, RSRQ, value of the serving cell is less than or equal to the first RSRQ threshold.

In some possible implementations, the first RSRP threshold and the first RSRQ threshold are preset threshold values. Therefore, the first RSRP threshold and the first RSRQ value are reasonable threshold values calculated by big data in the embodiment of the present application, which are helpful for adapting to the service requirements of the terminal device.

In some possible implementations, the second measurement result satisfies a second preset condition, including: the RSRP value of the neighboring cell is greater than the second RSRP threshold and/or the RSRQ value of the neighboring cell is greater than the second RSRQ value.

Optionally, the second measurement result satisfying the second preset condition may also be understood as a reporting condition of the B1 measurement event in the current standard protocol. The values of the second RSRP threshold and the second RSRQ threshold may refer to the reporting threshold of the B1 measurement event in the current standard protocol.

In some possible implementations, after reporting the measurement report of the first measurement event to the access network device, the method further includes:

Receiving a switching command from the access network equipment;

And switching from the service cell to the neighbor cell according to the switching command.

Therefore, after the reporting condition of the embodiment of the application is met, if the measurement report of the first measurement event is reported, a switching command of the access network equipment is received, so that the access network equipment is switched to a neighboring cell with better signal, and the terminal service communication is ensured. In other words, when the signal quality of the serving cell is indeed poor and the signal quality of the neighbor cell is good, a handover to the neighbor cell may be performed.

In the embodiment of the present application, the first measurement event may be issued by the access network device when an abnormality occurs, or may be issued normally, which is not limited in the embodiment of the present application.

In some possible implementations, before receiving the first measurement event from the access network device, the method further includes:

receiving a second measurement event (i.e., an A2 measurement event) from the access network device, the second measurement event being for measuring signal quality of a serving cell;

Measuring a service cell of the terminal equipment according to the second measurement event to obtain a third measurement result;

and when the third measurement result does not meet the reporting condition of the second measurement event, not reporting the measurement report of the second measurement event to the access network equipment.

In some possible implementations, for the case where the measurement report of the second measurement event is not reported, the first measurement result refers to: the terminal device measures a measurement result of the signal quality of the serving cell after receiving the second measurement event and before performing the first measurement event.

Illustratively, the access network device issues an A2 measurement event to the terminal device, and if the terminal device measures that the signal quality of the serving cell does not meet the A2 reporting threshold, the terminal device does not report an A2 measurement report. But due to the access network equipment abnormality, even if the A2 measurement report is not received, the B1 measurement event is still issued. When judging whether to report the B1 measurement report, the prior art only considers whether to meet the B1 report condition and does not consider the signal quality of the current service cell, namely the prior art can report the B1 measurement report when meeting the B1 report condition. In the embodiment of the present application, if the B1 reporting condition is satisfied, but the signal quality of the serving cell is enhanced (for example, the RSRP value of the serving cell is greater than the first RSRP threshold value and/or the RSRQ value of the serving cell is greater than the first RSRQ threshold value), the B1 measurement report is not reported at this time, so that the terminal device is prevented from being switched from the NR cell with better signal coverage to the LTE cell with poor signal coverage.

In some possible implementations, before the receiving the first measurement event from the access network device, the method further includes:

And reporting a measurement report (A2 measurement report) of the second measurement event to the access network equipment when the third measurement result meets the reporting condition of the second measurement event.

In some possible implementations, for the case that the terminal device reports the measurement report of the second measurement event, the first measurement result refers to a measurement result of the signal quality of the serving cell measured by the terminal device after the terminal device reports the measurement report of the second measurement event and before the first measurement event is performed.

Illustratively, the access network device issues an A2 measurement event to the terminal device, and if the terminal device measurement meets the A2 reporting threshold, the terminal device reports an A2 measurement report. And the access network equipment transmits a B1 measurement event to the terminal equipment after receiving the A2 measurement report. The terminal device resides in the coverage area of the NR network. The terminal device measures that the signal quality of the current NR serving cell is enhanced (e.g., the RSRP value of the serving cell is greater than the first RSRP threshold and/or the RSRQ value of the serving cell is greater than the first RSRQ threshold), and the B1 measurement event also satisfies the reporting condition, then no B1 measurement report will be reported at this time. In the prior art, when judging whether to report the B1 measurement report, only whether the B1 reporting condition is met is considered, and the signal quality of the current serving cell is not considered, namely, the prior art reports the B1 measurement report when the B1 reporting condition is met. In the embodiment of the present application, if the B1 reporting condition is satisfied, but the signal quality of the serving cell is enhanced (for example, the RSRP value of the serving cell is greater than the first RSRP threshold value and/or the RSRQ value of the serving cell is greater than the first RSRQ threshold value), the B1 measurement report is not reported at this time, so that the terminal device is prevented from being switched from the NR cell with better signal coverage to the LTE cell with poor signal coverage.

In some possible implementations, the third measurement result satisfies a reporting condition of the second measurement event, including: the RSRP value of the serving cell is less than or equal to the third RSRP threshold and/or the RSRQ value of the serving cell is less than or equal to the third RSRQ threshold.

Optionally, the third measurement result satisfying the reporting condition of the second measurement event may also be understood as a reporting condition of an A2 measurement event in the current standard protocol. The values of the third RSRP threshold and the third RSRQ threshold may refer to the reporting threshold of the A2 measurement event in the current standard protocol.

In a second aspect, a communication method is provided, which may be performed, for example, by an access network device, or may also be performed by a component (such as a circuit, chip or chip system, etc.) arranged in the access network device. The application is not limited in this regard.

Specifically, the communication method includes: the access network equipment sends a first measurement event to the terminal equipment, wherein the first measurement event is used for the terminal equipment to measure the signal quality of the neighbor cell; the method comprises the steps that an access network device receives a measurement report of a first measurement event, wherein the measurement report of the first measurement event is reported by a terminal device when a first measurement result meets a first preset condition and a second measurement result meets a second preset condition, the first measurement result is a measurement result of signal quality of a service cell where the terminal device currently resides, and the second measurement result is a measurement result of signal quality of a neighbor cell.

Based on the technical scheme, after the access network equipment issues the first measurement event (B1 measurement event) to the terminal equipment, the access network equipment receives the measurement report of the first measurement event reported by the terminal equipment, and the measurement report of the first measurement event is reported by the terminal equipment when the reporting condition of the embodiment of the application is met. In the embodiment of the application, if the access network equipment missends the B1 measurement event due to abnormality, the terminal equipment can be prevented from being switched from the cell with better signal coverage to the cell with worse signal coverage.

For a related implementation manner that the first measurement result meets the preset condition, reference may be made to the description of the first aspect, which is not repeated herein for brevity.

For a related implementation manner that the second measurement result meets the preset condition, reference may be made to the description of the first aspect, which is not repeated herein for brevity.

In some possible implementations, after the access network device receives the measurement report of the first measurement event from the terminal device, the method further includes:

and issuing a switching command to the terminal equipment, wherein the switching command is used for indicating the terminal equipment to switch from the service cell to the neighbor cell.

Therefore, after the reporting condition of the embodiment of the application is determined to be met, if the measurement report of the first measurement event is reported, a switching command is issued to the terminal equipment so as to instruct the terminal equipment to switch from a cell with poor signal coverage to a neighboring cell with good signal, and the terminal service communication is ensured. In other words, when the signal quality of the serving cell is indeed poor and the signal quality of the neighbor cell is good, the terminal device may be instructed to switch to the neighbor cell with better signal.

In some possible implementations, before the access network device issues the first measurement event, the method further includes:

A second measurement event (i.e. an A2 measurement event) is sent to the terminal device, which is used by the terminal device to measure the signal quality of the serving cell.

And when the access network equipment does not receive the measurement report of the second measurement event reported by the terminal equipment, the first measurement event is issued to the access network equipment.

In some possible implementations, the method further includes: and receiving a measurement report (A2 measurement report) of a second measurement event reported by the terminal equipment, wherein the measurement report of the second measurement event is reported by the terminal equipment when a third measurement result meets the reporting condition of the second measurement event. The third measurement result is a result of the terminal device measuring the serving cell of the terminal device according to the second measurement event.

Under normal conditions, the access network device does not issue the first measurement event to the access network device if the access network device receives the measurement report of the second measurement event reported by the terminal device.

Optionally, in a possible implementation manner, the access network device is abnormal, and when the measurement report of the second measurement event reported by the terminal device is not received, the first measurement event is still issued to the access network device. If the measurement report of the second measurement event is not received, the signal of the service cell where the terminal equipment is located is better, and the terminal equipment is not required to be instructed to perform different system measurement at the moment, and the terminal equipment is switched to the adjacent cell. If the reporting condition of the measurement report of the first measurement event is not satisfied (i.e., the first measurement result does not satisfy the first preset condition and/or the second measurement result does not satisfy the second preset condition), the measurement report of the first measurement event may not be reported, so as to avoid the terminal device from switching from the cell with better signal to the cell with worse signal. Therefore, for the scene that the access network equipment abnormally issues the first measurement event, the technical effect of the embodiment of the application is particularly remarkable.

In a third aspect, a communication device is provided comprising individual modules or units for performing the method in any of the possible implementations of the first and second aspects.

In one design, the communication device may include modules corresponding to the methods/operations/steps/actions described in the above aspects, where the modules may be hardware circuits, software, or a combination of hardware circuits and software.

In one design, the communication device is a communication chip that may include an input circuit or interface for transmitting information or data, and an output circuit or interface for receiving information or data.

In another design, the communication device is a communication apparatus that may include a transmitter for transmitting information or data and a receiver for receiving information or data.

In another design, the communication device is configured to perform the method in any possible implementation manner of the first aspect, where the communication device may be configured in the terminal device, or the communication device itself is the terminal device.

Or in yet another design, the communication apparatus is configured to perform the method in any possible implementation manner of the second aspect, where the communication apparatus may be configured in the access network device, or the communication apparatus itself is the access network device.

In a fourth aspect, a communication device is provided that includes a processor. The processor is coupled to the memory and operable to execute instructions or data in the memory to implement the method of any one of the possible implementations of the first and second aspects described above. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, and the processor is coupled to the communication interface.

In one implementation, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in the terminal device. When the communication means is a chip arranged in the terminal device, the communication interface may be an input/output interface.

Or in another implementation the communication means is a chip arranged in the access network device. When the communication means is a chip arranged in an access network device, the communication interface may be an input/output interface.

Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.

In a fifth aspect, there is provided a processor comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive signals via the input circuit and to transmit signals via the output circuit, such that the processor performs the method in any one of the possible implementations of the first and second aspects.

In a specific implementation process, the processor may be one or more chips, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the output signal may be output by, for example and without limitation, a transmitter and transmitted by a transmitter, and the input circuit and the output circuit may be the same circuit, which functions as the input circuit and the output circuit, respectively, at different times. The embodiment of the application does not limit the specific implementation modes of the processor and various circuits.

In a sixth aspect, a communication device is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory and is configured to receive signals via the receiver and to transmit signals via the transmitter to perform the method of any one of the possible implementations of the first and second aspects.

Optionally, the processor is one or more, and the memory is one or more.

Alternatively, the memory may be integrated with the processor or the memory may be separate from the processor.

In a specific implementation process, the memory may be a non-transient (non-transitory) memory, for example, a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips.

It should be appreciated that the related data interaction process, for example, transmitting the indication information, may be a process of outputting the indication information from the processor, and the receiving the capability information may be a process of receiving the input capability information by the processor. Specifically, the data output by the processor may be output to the transmitter, and the input data received by the processor may be from the receiver. Wherein the transmitter and receiver may be collectively referred to as a transceiver.

The processing means in the sixth aspect described above may be one or more chips. The processor in the processing device may be implemented by hardware or may be implemented by software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor, implemented by reading software code stored in a memory, which may be integrated in the processor, or may reside outside the processor, and exist separately.

In a seventh aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions) which, when executed, causes a computer to perform the method of any one of the possible implementations of the first and second aspects described above.

In an eighth aspect, a computer readable storage medium is provided, which stores a computer program (which may also be referred to as code, or instructions) which, when run on a computer, causes the computer to perform the method of any one of the possible implementations of the first and second aspects.

In a ninth aspect, embodiments of the present application provide a chip system comprising one or more processors configured to invoke from a memory and execute instructions stored in the memory, such that the method of each of the above aspects or any of the possible implementations of each of the aspects is performed. The chip system may be formed of a chip or may include a chip and other discrete devices.

The chip system may include an input circuit or interface for transmitting information or data, and an output circuit or interface for receiving information or data, among other things.

In a tenth aspect, a communication system is provided, comprising one or more of the aforementioned terminal device, access network device. Optionally, the communication system may also comprise other devices for communicating with the terminal device and/or the access network device.

Drawings

FIG. 1 is an exemplary diagram of an application scenario of an embodiment of the present application;

fig. 2 is a schematic flow chart of a method for cell handover according to an embodiment of the application;

fig. 3 is an exemplary interaction diagram of a method for cell handover according to an embodiment of the present application;

fig. 4 is another exemplary interaction diagram of a method for cell handover according to an embodiment of the present application;

FIG. 5 is a schematic block diagram of a communication device provided by an embodiment of the present application;

FIG. 6 is another schematic block diagram of a communication device provided by an embodiment of the present application;

Fig. 7 is a schematic structural diagram of an access network device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

In embodiments of the present application, "plurality" may be understood as "at least two"; "multiple items" may be understood as "at least two items".

The technical scheme of the embodiment of the application can be applied to various communication systems, such as: long term evolution (long term evolution, LTE) system, universal mobile telecommunications system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication system, fifth generation (5th generation,5G) system or New Radio (NR) and future mobile communication systems, vehicle-to-other devices (V2X), where V2X may include vehicle-to-internet (vehicle to network, V2N), vehicle-to-vehicle (V2V), vehicle-to-infrastructure (vehicle to infrastructure, V2I), vehicle-to-pedestrian (vehicle to pedestrian, V2P) and the like, long term evolution of vehicle-to-vehicle technology (Long Term Evolution-vehicle, LTE-V), internet of vehicles, machine-like communication (MACHINE TYPE communication, MTC), internet of things (Internet of Things, ioT), inter-machine long term evolution of vehicle technology (Long Term Evolution-machine, LTE-M), machine-to-machine (Machine to Machine, M2M) and the like.

Fig. 1 is a schematic diagram of an architecture of a mobile communication system to which an embodiment of the present application is applied. As shown in fig. 1, the mobile communication system includes a core network device 110, a radio access network device 120, and at least one terminal device (e.g., terminal device 130 and terminal device 140 in fig. 1). The terminal equipment is connected with the wireless access network equipment in a wireless mode, and the wireless access network equipment is connected with the core network equipment in a wireless or wired mode. The core network device and the radio access network device may be separate physical devices, or may integrate the functions of the core network device and the logic functions of the radio access network device on the same physical device, or may integrate the functions of part of the core network device and part of the radio access network device on one physical device. The terminal device may be fixed in position or may be movable.

It should be understood that fig. 1 is merely a schematic architecture diagram of a communication system, and other network devices may be included in the communication system, for example, a wireless relay device and a wireless backhaul device may also be included in the communication system, which are not shown in fig. 1. The embodiment of the application does not limit the number of the core network equipment, the radio access network equipment and the terminal equipment included in the mobile communication system.

The terminal device may also be referred to as: a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment, etc.

The terminal device may be a device providing voice/data connectivity to a user, e.g., a handheld device with wireless connectivity, an in-vehicle device, etc. Currently, some examples of terminals are: a mobile phone, a tablet, a laptop, a palmtop, a mobile internet device (mobile INTERNET DEVICE, MID), a wearable device, a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal hosting a cloud game, a wireless terminal in unmanned (SELF DRIVING), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (SMART GRID), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (SMART CITY), a wireless terminal in smart home (smart home), a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication functionality, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network, or an evolving terminal in a future public land communication network, etc. the application is not limited to this application.

By way of example, and not limitation, in embodiments of the present application, the terminal device may also be a wearable device. The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wear by applying wearable technology and developing wearable devices, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.

In addition, in the embodiment of the application, the terminal equipment can also be terminal equipment in an internet of things (internet of things, ioT) system, and the IoT is an important component of the development of future information technology, and the main technical characteristics are that the object is connected with the network through a communication technology, so that the man-machine interconnection and the intelligent network of the internet of things are realized. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the terminal equipment.

The radio access network (radio access network, RAN) device is an access device that a terminal device accesses to the mobile communication system in a wireless manner, and may be a base station NodeB, an evolved base station (evloved NodeB, eNB), a next generation base station (gNB) in the 5G mobile communication system, a transmission point, a base station in a future mobile communication system or an access node in a Wi-Fi system, one or more antenna panels of a base station in the 5G system, or may also be a network node that forms the gNB or the transmission point, such as a baseband unit (BBU), or a Distributed Unit (DU), etc. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the wireless access network equipment. In some deployments, the gNB may include a Central Unit (CU) and a DU, each implementing part of the functionality of the gNB. For example, the CU is responsible for handling non-real time protocols and services, implementing the functions of the radio resource control (radio resource control, RRC), packet data convergence layer protocol (PACKET DATA convergence protocol, PDCP) layer. The DU is responsible for handling physical layer protocols and real-time services, and implements functions of a radio link control (radio link control, RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. The gNB may also include an active antenna unit (ACTIVE ANTENNA units, AAU). The AAU realizes part of physical layer processing function, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer may be eventually changed into or converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the du+aau. It is understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be used as a network device in an access network, or may be used as a network device in a Core Network (CN), which is not limited by the present application.

The radio access network device and the terminal device may be deployed on land, including indoor or outdoor, hand-held or vehicle-mounted; the device can be deployed on the water surface; but also on aerial planes, balloons and satellites. The embodiment of the application does not limit the application scenes of the wireless access network equipment and the terminal equipment.

Communication between the radio access network device and the terminal device and between the terminal device and the terminal device can be performed through a licensed spectrum (licensed spectrum), communication can be performed through an unlicensed spectrum (unlicensed spectrum), and communication can be performed through both the licensed spectrum and the unlicensed spectrum. Communication between the radio access network device and the terminal device and between the terminal device and the terminal device can be performed through a frequency spectrum of 6 gigahertz (GHz) or less, communication can be performed through a frequency spectrum of 6G or more, and communication can be performed by using a frequency spectrum of 6G or less and a frequency spectrum of 6G or more simultaneously. The embodiment of the application does not limit the spectrum resources used between the wireless access network equipment and the terminal equipment.

In the embodiment of the application, the terminal equipment or the network equipment comprises a hardware layer, an operating system layer running on the hardware layer and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address book, word processing software, instant messaging software and the like. Further, the embodiment of the present application is not particularly limited to the specific structure of the execution body of the method provided by the embodiment of the present application, as long as the communication can be performed by the method provided according to the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, and for example, the execution body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call the program and execute the program.

Furthermore, various aspects or features of the application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein encompasses a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, or magnetic strips, etc.), optical disks (e.g., compact disk, CD, digital versatile disk, DIGITAL VERSATILE DISC, DVD, etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory, EPROM), cards, sticks, key drives, etc. Additionally, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

To facilitate an understanding of the embodiments of the present application, the terms involved in the present application will first be briefly described. It should be understood that for part of the term interpretation reference may also be made to interpretation in the third generation partnership project (3rd generation partnership project,3GPP) standard protocol.

1. Cell (cell): the cells are described by a higher layer from the point of view of resource management or mobility management or service units. The coverage area of each network device may be divided into one or more cells. A cell may be an area within the coverage area of a wireless network of network devices. For example, a cell under NR network coverage is called an NR cell, and a cell under LTE network coverage is called an LTE cell.

The signal quality strength of a cell may be characterized by reference signal received power (REFERENCE SIGNAL RECEIVED power, RSRP), reference signal received quality (REFERENCE SIGNAL RECEIVED quality, RSRQ).

The cell in which the terminal device is currently camping may be referred to as a serving cell. The terminal device may perform service communication in the camped serving cell.

It may be understood that the radio access technology of the neighboring cell may be the same as or different from the radio access technology of the serving cell of the terminal device, which is not limited in the embodiment of the present application. For example, when the radio access technology of the serving cell of the terminal device is 5G (or NR), the neighbor cell of the paging area discovered by the terminal device may be LTE. For another example, when the radio access technology of the serving cell of the terminal device is LTE, the neighbor cell of the paging area discovered by the terminal device may be 5G (or NR).

In the embodiment of the application, the cell may be replaced by access network equipment (such as a base station) corresponding to the cell.

For example, in the embodiments of the present application, the "serving cell" may be replaced by a network device corresponding to the "serving cell", e.g., the "serving cell" is replaced by the "serving access network device or the" serving base station ".

As another example, the "neighboring cell" mentioned in the embodiments of the present application may also be referred to as a non-serving cell (non-SERVING CELL), "neighboring cell" may be replaced by a network device corresponding to the neighboring cell, for example, "neighboring cell" is replaced by "neighboring access device or neighboring base station".

2. A2 measurement event: the signal quality of the serving cell in which the terminal device resides is indicated to be poor, for example, the RSRP value of the serving cell is smaller than the RSRP threshold value. The A2 measurement event may be used to turn on measurements between certain cells. When an A2 measurement event occurs, cell handover or the like may occur later.

3. B1 measurement event: indicating that the signal quality of the neighboring cells of the different system is measured to be higher than a certain threshold value. The access network equipment transmits a B1 measurement event to the terminal equipment. And the terminal equipment reports the B1 measurement report after the terminal equipment detects that the reporting threshold of the B1 event is met. And after the B1 measurement report is reported, the access network equipment starts the inter-system switching. For example, the source access network device (i.e., the serving access network device) may send a handover command to the terminal device to instruct the terminal device to handover to a neighboring cell of the different system.

In general, after the access network device issues an A2 measurement event to the terminal device, if a measurement report of the A2 measurement event reported by the terminal device is received, the access network device issues a B1 measurement event to the terminal device to measure a neighboring cell. However, if the access network device is abnormal, the access network device may also issue a B1 measurement event to the terminal device in the case that the measurement report of the A2 measurement event is not received, thereby causing the terminal device to switch to a neighboring cell with poor signal. The coverage signal of the serving cell network (such as NR) where the terminal equipment is located is good, and the cell switching is not needed. Switching from a cell with good coverage signals to a cell with poor coverage signals (such as LTE) may cause service anomalies of the terminal device, such as, for example, interruption of a call, dropped call, interruption of a call, slowing of a data network, interruption of data, and so on, which seriously affects user experience.

In view of this, an embodiment of the present application provides a method and an apparatus for cell handover, where after a first measurement event (B1 measurement event) issued by an access network device is received, a first measurement result of signal quality of a current serving cell is obtained, and a second measurement result is obtained by measuring a neighboring cell according to the first measurement event, and when both the first measurement result and the second measurement result meet a threshold condition, a measurement report of the first measurement event is reported. That is, after measuring the signal quality of the neighbor cell, the signal quality of the current serving cell needs to be considered, so as to determine whether to report the measurement report of the first measurement event, so that the following situations can be avoided: after the access network equipment missends the B1 measurement event due to abnormality, the terminal equipment is switched from a cell with better signal coverage to a cell with worse signal coverage.

The communication method of the embodiment of the present application will be described below with reference to fig. 2 to 4.

Referring to fig. 2, fig. 2 is a schematic interaction diagram of a communication method according to an embodiment of the present application. It will be appreciated that the terminal device in fig. 2 may be the terminal device in fig. 1 (e.g., the terminal device 130 or the terminal device 140), or may refer to a device in the terminal device (e.g., a processor, a chip, or a chip system, etc.). The access network device may be access network device 120 of fig. 1, or may refer to a device (e.g., a processor, chip, or system-on-a-chip, etc.) in the access network device. It is further understood that part or all of the information interacted between the terminal device and the access network device in fig. 2 may be carried in an existing message, channel, signal or signaling, or may be a newly defined message, channel, signal or signaling, which is not limited in particular. As shown in fig. 2, the method includes:

In step 210, the terminal device receives a first measurement event from the access network device.

Illustratively, the first measurement event is a B1 measurement event. The first measurement event is used to measure signal quality of a neighboring cell of the different system. The relevant description of the B1 measurement event may be referred to above, and will not be repeated here for brevity.

The embodiment of the application does not limit the time for issuing the first measurement event to the access network equipment.

For example, the access network device is the first measurement event issued when an anomaly occurs.

For another example, the access network device is issued when receiving an A2 measurement report reported by the terminal device.

Step 220, the terminal device obtains a first measurement result, where the first measurement result is a measurement result of signal quality of a serving cell where the terminal device currently camps.

In the embodiment of the present application, after receiving the B1 measurement event (corresponding to the first measurement event in step 210), the terminal device needs to acquire the signal quality strength of the current serving cell in addition to measuring the neighboring cells of the different systems, so as to combine the signal quality condition of the serving cell and the signal quality condition of the neighboring cells to jointly determine whether to report the measurement report of the B1 measurement event (abbreviated as the B1 measurement report).

The first measurement is used to characterize the signal quality strength of the serving cell in which the terminal device is currently camping. The embodiment of the application does not limit the specific characterization factor of the first measurement result. For example, the first measurement result may be characterized by RSRP and/or RSRQ, or the first measurement result may include an RSRP value and/or an RSRQ value of the current serving cell.

The measurement timing of the first measurement result is not particularly limited in the embodiment of the present application. Optionally, as an implementation, the first measurement is a periodic measurement. The access network device may configure the measurement period of the terminal device so that the terminal device periodically measures the signal quality of the current serving cell.

Step 230, the terminal device measures the neighboring cell of the terminal device according to the first measurement event, and obtains a second measurement result, where the second measurement result is a measurement result of signal quality of the neighboring cell.

Illustratively, the terminal device performs measurement of the B1 event, i.e. performs measurement of signal quality of the neighboring cells of the different system, after receiving the B1 measurement event.

The second measurement is used to characterize the signal quality strength of the neighbor cell of the terminal device. The embodiment of the application does not limit the specific characterization factor of the second measurement result. Similarly, the second measurement may be characterized by RSRP and/or RSRQ, or the second measurement may comprise an RSRP value and/or an RSRQ value of the neighbor cell, for example.

In the embodiment of the present application, after obtaining the first measurement result and the second measurement result, the terminal device needs to determine whether the first measurement result and the second measurement result meet the reporting condition (the reporting condition is a condition for reporting the measurement report of the first measurement event) in the embodiment of the present application.

In step 240, the terminal device determines whether the first measurement result meets a first preset condition, and whether the second measurement result meets a second preset condition.

In other words, the embodiment of the application redefines the reporting condition of the B1 measurement report, namely: the first measurement result meets a first preset condition, and the second measurement result meets a second preset condition.

For example, a NRRRC module may be provided in the terminal device, and the NRRRC module may decide whether to report a measurement report of the B1 measurement event. For example, NRRRC modules perform step 240, step 250, step 280, etc.

If the first measurement result meets the first preset condition and the second measurement result meets the second preset condition, reporting a measurement report of the first measurement event, which specifically includes: step 250, step 260 and step 270 are performed.

If the first measurement result does not meet the first preset condition and/or the second measurement result does not meet the second preset condition, not reporting a measurement report of the first measurement event, which specifically includes: steps 280 and 290 are performed.

Step 250, when the first measurement result meets a first preset condition and the second measurement result meets a second preset condition, reporting a measurement report of the first measurement event to the access network device by the terminal device.

It should be noted that, in the embodiment of the present application, two conditions are required to be satisfied for reporting the measurement report of the first measurement event, one is a preset condition about the signal quality intensity of the neighboring cell (i.e., the second measurement result satisfies the second preset condition), and the other is a preset condition about the signal quality intensity of the serving cell (i.e., the first measurement result satisfies the first preset condition). Only if both conditions are met will a measurement report of the first measurement event be reported. In other words, the embodiment of the present application sets the reporting condition of the measurement report of the first measurement event to "the first measurement result satisfies the first preset condition, and the second measurement result satisfies the second preset condition".

The "the first measurement result satisfies the first preset condition" may be understood as "the signal quality strength of the current serving cell satisfies the first preset condition". "

The embodiment of the present application is not particularly limited to the index for characterizing the signal quality strength of the cell. For example, RSRP and/or RSRQ may be employed to characterize the signal quality strength of the serving cell or neighbor cell.

Optionally, as a possible implementation manner, the first measurement result meets a first preset condition, including: the RSRP value of the serving cell is less than or equal to the first RSRP threshold and/or the RSRQ value of the serving cell is less than or equal to the first RSRQ threshold.

It should be noted that, the first RSRP threshold (may be denoted as threshold-RSRP) and the first RSRQ threshold (may be denoted as threshold-RSRQ) are preset threshold values introduced or set in the embodiment of the present application. The application is beneficial to adapting the service requirement of the terminal equipment by setting the reasonable preset threshold value. For example, the first RSRP threshold or the first RSRQ threshold is a reasonable threshold calculated for big data, which is helpful for the terminal device to reside in a cell with better signal coverage.

The "the second measurement result satisfies the second preset condition" may be understood as "the signal quality strength of the neighboring cell satisfies the second preset condition".

Optionally, as a possible implementation manner, the second measurement result meets a second preset condition, including: the RSRP value of the neighboring cell is greater than the second RSRP threshold and/or the RSRQ value of the neighboring cell is greater than the second RSRQ value.

It should be understood that the second RSRP threshold may be the same as or different from the RSRP threshold in the B1 measurement event reporting condition involved in the related standard protocol, which is not specifically limited in the embodiment of the present application.

It should also be understood that the second RSRQ threshold may be the same as or different from the RSRQ threshold in the reporting condition of the B1 measurement event involved in the related standard protocol, which is not specifically limited in the embodiment of the present application.

For the case that the terminal device reports the measurement report of the first measurement event, after the terminal device reports the measurement report of the first measurement event, the access network device issues a handover command (or a handover instruction) to the terminal device.

Optionally, the method further comprises:

in step 260, the terminal device receives a handover command from the access network device. The switching command is used for indicating the terminal equipment to switch from the current service cell to the adjacent cell.

Step 270, the terminal device switches from the service cell to the neighbor cell according to the switching command.

That is, after determining that the reporting condition (i.e., the judging condition of step 250) of the embodiment of the present application is satisfied, the terminal device reports the measurement report of the first measurement event. After reporting the measurement report of the first measurement event, the terminal equipment receives the switching command of the access network equipment, so that the terminal equipment is switched to the adjacent cell with better signal, and the terminal service communication is ensured. In other words, when the signal quality of the serving cell is indeed poor and the signal quality of the neighbor cell is good, a handover to the neighbor cell may be performed.

The specific process of the cell handover in the embodiment of the present application is not described in detail, and reference may be made specifically to the related cell handover technology.

In the embodiment of the present application, when the terminal device receives the first measurement event, the terminal device needs to determine whether the signal quality strength of the neighboring cell meets the second preset condition, and whether the signal quality strength of the currently-camping serving cell meets the first preset condition. When the signal quality intensity of the adjacent cell meets a second preset condition and the signal quality intensity of the service cell meets a first preset condition, the terminal equipment reports the measurement report of the first measurement event. In this way, the terminal equipment can be prevented from being switched from a serving cell with good signal quality (such as an NR cell) to a cell with poor signal quality (such as an LTE cell), so that the terminal equipment can stay on the cell with good signal coverage. And further, for the situation that the signal quality of the service cell where the terminal equipment currently resides is better, if the first measurement event is sent down by mistake due to the abnormality of the access network equipment, the effect of the embodiment of the application is more remarkable, and the service experience of the terminal equipment is ensured.

Optionally, as an implementation manner, the method further includes:

Step 280, when the first measurement result does not meet the first preset condition and/or the second measurement result does not meet the second preset condition, not reporting the measurement report of the first measurement event.

In an exemplary embodiment, when the RSRP value of the serving cell is greater than the first RSRP threshold, the RSRQ value of the serving cell is greater than the first RSRQ threshold, and the RSRP value of the neighboring cell is greater than the second RSRP threshold, the measurement report of the first measurement event is not reported when the RSRQ value of the neighboring cell is greater than the second RSRQ value. That is, when the signal quality of the serving cell is good, the B1 measurement report is not reported even if the reporting threshold of the B1 measurement event is satisfied.

It should be understood that the foregoing is described by taking as an example the signal quality strength of a cell, which is characterized by two factors, RSRP and RSRQ, and the embodiments of the present application are not limited thereto. In fact, it is also possible to describe the signal quality strength of a cell in terms of one of the factors (RSRP or RSRQ).

The measurement report of the first measurement event is not reported, for example, when the RSRP value of the serving cell is greater than a first RSRP threshold and the RSRP value of the neighbor cell is greater than a second RSRP threshold. That is, when the signal quality of the serving cell is good, the B1 measurement report is not reported even if the reporting threshold of the B1 measurement event is satisfied.

It should be understood that, in the embodiment of the present application, whether the signal quality intensity of the serving cell and the signal quality intensity of the neighboring cell adopt the same characterization factor is not specifically limited, and the signal quality intensity of the neighboring cell may be the same or different.

In step 290, for the case that the measurement report of the first measurement event is not reported, the terminal device continues to camp on the current serving cell.

For the access network device, the access network device may issue the second measurement event before issuing the first measurement event to the terminal device, or may not issue the second measurement event. Different scenarios will be described below in connection with fig. 3 and 4.

Fig. 3 shows a schematic interaction diagram of one scenario of an embodiment of the application. It will be appreciated that the terminal device in fig. 3 may be the terminal device in fig. 1 (e.g., the terminal device 130 or the terminal device 140), or may refer to a device in the terminal device (e.g., a processor, a chip, or a chip system, etc.). The access network device may be access network device 120 of fig. 1, or may refer to a device (e.g., a processor, chip, or system-on-a-chip, etc.) in the access network device. It is further understood that part or all of the information interacted between the terminal device and the access network device in fig. 3 may be carried in an existing message, channel, signal or signaling, or may be a newly defined message, channel, signal or signaling, which is not limited in particular.

In the scenario shown in fig. 3, the access network device issues a second measurement event before issuing the first measurement event to the terminal device. As shown in fig. 3, the method specifically comprises the following steps:

step 301, the access network device issues a second measurement event to the terminal device. Correspondingly, the terminal equipment receives the second measurement event.

That is, the access network device may first issue a second measurement event to the terminal device before the access network device issues the first measurement event to the terminal device.

Optionally, the access network device issues the A2 measurement event through an RRC measurement configuration message. The related description of the A2 measurement event may be referred to the foregoing description, and will not be repeated herein for brevity.

For example, the access network device sends RRCReconfiguration (event A2) to the terminal device. After receiving RRCReconfiguration (event A2), the terminal may feed back RRCConnectionReconfigurationComplete a message to the access network device.

The second measurement event is used to measure the signal quality of the current serving cell.

And step 302, the terminal equipment performs measurement according to the second measurement event to obtain a third measurement result.

Illustratively, the third measurement comprises: RSRP of the serving cell and/or RSRQ value of the serving cell.

In step 303, the terminal device determines whether the third measurement result meets a reporting condition of the second measurement event (such as a measurement threshold of the A2 event).

Illustratively, the reporting condition that the third measurement result satisfies the second measurement event includes: the RSRP value of the serving cell is less than or equal to the third RSRP threshold and/or the RSRQ value of the serving cell is less than or equal to the third RSRQ threshold.

It may be appreciated that the third RSRP threshold or the third RSRQ threshold may be the same as or different from the reporting threshold of the A2 measurement event in the communication standard protocol, which is not limited in particular.

If the third measurement satisfies the reporting condition of the second measurement event, then step 304 is performed; if the third measurement result does not meet the reporting condition of the second measurement event, the terminal device does not report the measurement report of the second measurement event.

Step 304, the terminal device reports a measurement report (A2 measurement report) of the second measurement event to the access network device.

Illustratively, the terminal device reports MeasurementReport (event A2) to the access network device.

In step 305, the access network device issues a first measurement event (i.e. a B1 measurement event) to the terminal device after receiving the measurement report of the second measurement event.

Optionally, the access network device issues the B1 measurement event through an RRC measurement configuration message.

For example, the access network device sends RRCReconfiguration (event B1) to the terminal device. After receiving RRCReconfiguration (event B1), the terminal may feed back RRCConnectionReconfigurationComplete a message to the access network device.

In step 306-1, the terminal device performs a first measurement event (i.e. performs measurement on the neighboring cell of the terminal device), and obtains a second measurement result.

The second measurement result comprises, for example, an RSRP value of the neighboring cell and/or an RSRQ value of the neighboring cell.

In step 306-2, the terminal device obtains a first measurement result, where the first measurement result is a measurement result of signal quality of a serving cell where the terminal device currently resides.

The first measurement result may be obtained by referring to the description of step 220, which is omitted for brevity.

It should be noted that, the measurement timings of the first measurement result and the third measurement result of step 302 are different, and the corresponding actions are also different. The third measurement result is obtained by the terminal device performing measurement of the serving cell based on the A2 measurement event after receiving the A2 measurement event (corresponding to the second measurement event), and the third measurement result is used as a judgment basis for whether to report the A2 measurement report. The first measurement result is acquired after reporting the A2 measurement report and before executing the B1 measurement event, and is used as one of the judgment bases for reporting the B1 measurement report.

The first measurement result comprises, for example, an RSRP value of the serving cell and/or an RSRQ value of the serving cell.

One possible implementation way is that after the A2 measurement report is reported, the signal quality of the current serving cell of the terminal device is enhanced, e.g. the RSRP value of the serving cell is greater than the first RSRP threshold and/or the RSRQ value of the serving cell is less than or equal to the first RSRQ threshold.

It should be further noted that, optionally, the first measurement result and the third measurement result of step 302 may also be related to different correlation thresholds. The correlation threshold for the first measurement includes a first RSRP threshold and a first RSRQ threshold. The correlation threshold for the third measurement includes a third RSRP threshold and a third RSRQ threshold.

The first RSRP threshold is illustratively different from the third RSRP threshold. The first RSRQ threshold is different from the third RSRQ threshold.

Step 307, the terminal device determines whether the following conditions are satisfied at the same time: the second measurement results satisfy the B1 threshold, and the RSRP value of the serving cell is less than or equal to the first RSRP threshold and/or the RSRQ value of the serving cell is less than or equal to the first RSRQ threshold. Wherein the second measurement meeting the B1 threshold comprises: the RSRP value of the neighboring cell is greater than the second RSRP threshold and/or the RSRQ value of the neighboring cell is greater than the second RSRQ value.

Alternatively, as an implementation, if the following conditions are simultaneously satisfied: the second measurement result meets the B1 threshold, the RSRP value of the serving cell is smaller than or equal to the first RSRP threshold, and the RSRQ value of the serving cell is smaller than or equal to the first RSRQ threshold, and then reporting a measurement report of the first measurement event specifically includes: steps 308 to 310 are performed.

For example, when the RSRP value of the neighboring cell is greater than the second RSRP threshold, and the RSRP value of the serving cell is less than or equal to the first RSRP threshold, and the RSRQ value of the serving cell is less than or equal to the first RSRQ threshold, then reporting the measurement report of the first measurement event.

For another example, when the RSRQ value of the neighboring cell is greater than the second RSRQ value, and the RSRP value of the serving cell is less than or equal to the first RSRP threshold, and the RSRQ value of the serving cell is less than or equal to the first RSRQ threshold, then reporting the measurement report of the first measurement event.

For another example, when the RSRQ value of the neighboring cell is greater than the second RSRQ value and the RSRQ value of the serving cell is less than or equal to the first RSRQ threshold, the measurement report of the first measurement event is reported.

For another example, when the RSRP value of the neighboring cell is greater than the second RSRP threshold and the RSRP value of the serving cell is less than or equal to the first RSRP threshold, the measurement report of the first measurement event is reported.

It should be understood that the various examples described above are illustrative only and that embodiments of the application are not limited thereto.

Alternatively, as another implementation, if the following conditions are not met at the same time: the second measurement result satisfies the B1 threshold, and the RSRP value of the serving cell is less than or equal to the first RSRP threshold, and the RSRQ value of the serving cell is less than or equal to the first RSRQ threshold, so that the measurement report of the first measurement event is not reported, which specifically includes: step 311 is performed.

For example, when the RSRP value of the neighboring cell is greater than the second RSRP threshold, and the RSRP value of the serving cell is greater than the first RSRP threshold, and the RSRQ value of the serving cell is greater than the first RSRQ threshold, then the measurement report of the first measurement event is not reported.

For another example, when the RSRQ value of the neighboring cell is greater than the second RSRQ value, and the RSRP value of the serving cell is greater than the first RSRP threshold, and the RSRQ value of the serving cell is greater than the first RSRQ threshold, then the measurement report of the first measurement event is not reported.

For another example, when the RSRQ value of the neighboring cell is greater than the second RSRQ value and the RSRQ value of the serving cell is greater than the first RSRQ threshold, then the measurement report of the first measurement event is not reported.

For another example, when the RSRP value of the neighboring cell is greater than the second RSRP threshold and the RSRP value of the serving cell is greater than the first RSRP threshold, then the measurement report of the first measurement event is not reported.

It should also be understood that the determination condition shown in step 307 is merely an exemplary description of reporting the measurement report of the B1 measurement event in the embodiment of the present application, and the embodiment of the present application is not limited thereto. For example, the judgment condition shown in step 307 may be replaced with: the second measurement results satisfy the B1 threshold, and the RSRP value of the serving cell is less than or equal to the first RSRP threshold. For another example, the judgment condition shown in step 307 may be replaced with: the second measurement meets the B1 threshold and the RSRQ value of the serving cell is less than or equal to the first RSRQ threshold.

In step 308, the terminal device reports the measurement report of the first measurement event (i.e. the measurement report of the B1 measurement event) to the access network device.

Step 309, the access network device sends a handover command to the terminal device after receiving the measurement report of the first measurement event. Correspondingly, the terminal equipment receives a switching command.

The handover command is used to instruct the terminal device to handover from the current serving cell to the neighbor cell.

Illustratively, the handover command is mobilityFromNRCommand.

In step 310, the terminal device switches from the current serving cell to the neighboring cell according to the switch command.

The current serving cell is an NR cell, the neighboring cells are LTE cells, and the terminal device is handed over from the NR cell to the LTE cell based on the handover command.

In step 311, the terminal device does not report the measurement report of the first measurement event, and continues to camp on the current serving cell.

Illustratively, in this scenario, the access network device issues an A2 measurement event to the terminal device, which reports an A2 measurement report if the terminal device measurement meets an A2 reporting threshold. And the access network equipment transmits a B1 measurement event to the terminal equipment after receiving the A2 measurement report. The terminal device resides in the coverage area of the NR network. The terminal device measures that the signal quality of the current NR serving cell is enhanced (e.g., the RSRP value of the serving cell is greater than the first RSRP threshold and/or the RSRQ value of the serving cell is greater than the first RSRQ threshold), and the B1 measurement event also satisfies the reporting condition, then no B1 measurement report will be reported at this time. In the prior art, when judging whether to report the B1 measurement report, only whether the B1 reporting condition is met is considered, and the signal quality of the current serving cell is not considered, namely, the prior art reports the B1 measurement report when the B1 reporting condition is met. In the embodiment of the present application, if the B1 reporting condition is satisfied, but the signal quality of the serving cell is enhanced (for example, the RSRP value of the serving cell is greater than the first RSRP threshold value and/or the RSRQ value of the serving cell is greater than the first RSRQ threshold value), the B1 measurement report is not reported at this time, so that the terminal device is prevented from being switched from the NR cell with better signal coverage to the LTE cell with poor signal coverage.

Another scenario of an embodiment of the present application is described below in conjunction with fig. 4. The terminal device does not report the measurement report (A2 measurement report) of the second measurement event to the access network device, but still receives the first measurement event (B1 measurement event) issued by the access network device.

Fig. 4 shows a schematic interaction diagram of another scenario of an embodiment of the present application. It will be appreciated that the terminal device in fig. 4 may be the terminal device in fig. 1 (e.g., the terminal device 130 or the terminal device 140), or may refer to a device in the terminal device (e.g., a processor, a chip, or a chip system, etc.). The access network device may be access network device 120 of fig. 1, or may refer to a device (e.g., a processor, chip, or system-on-a-chip, etc.) in the access network device. It is further understood that part or all of the information interacted between the terminal device and the access network device in fig. 4 may be carried in an existing message, channel, signal or signaling, or may be a newly defined message, channel, signal or signaling, which is not limited in particular.

In the scenario shown in fig. 4, the terminal device does not report the measurement report of the second measurement event to the access network device. As shown in fig. 4, the method specifically comprises the following steps:

In step 401, in case that a measurement report (A2 measurement report) of the second measurement event of the terminal device is not received, the access network device issues a first measurement event (i.e. a B1 measurement event) to the terminal device.

It should be noted that, under normal conditions, if the access network device does not receive the A2 measurement report, the B1 measurement event is not issued. In the scenario in fig. 4, the access network device is abnormal, and in the case that the A2 measurement report is not received, the B1 measurement event is still issued to the terminal device.

The measurement report that the terminal device does not report the second measurement event has two cases: in case 1, the access network device does not issue a second measurement event before issuing a first measurement event to the terminal device; and 2, the access network equipment issues a second measurement event, but the terminal equipment judges that the reporting condition of the second measurement event is not met and does not report the measurement report of the second measurement event.

For the case 2, if the A2 measurement report is not received, it indicates that the signal of the serving cell where the terminal device is located is better, and at this time, the terminal device is not required to be instructed to perform different system measurement, and the terminal device is switched to the neighboring cell. The description of the second measurement event issued by the access network device may refer to the description of step 301, which is not repeated here. In addition, the reporting condition of the second measurement event may also refer to the description at step 303, and for brevity, will not be described herein.

Optionally, step 401 includes: the access network device issues a B1 measurement event through an RRC measurement configuration message.

In step 402, the terminal device performs a first measurement event (i.e. performs measurement on a neighboring cell of the terminal device), and obtains a second measurement result.

The second measurement result includes, for example, an RSRP value of the neighboring cell and an RSRQ value of the neighboring cell.

Step 403, the terminal device obtains a first measurement result, where the first measurement result is a measurement result of signal quality of a serving cell where the terminal device currently resides.

The first measurement result includes an RSRP value of the serving cell and an RSRQ value of the serving cell, for example.

Optionally, if the access network device issues a second measurement event before step 401, the first measurement result refers to a measurement result of the signal quality of the current serving cell measured by the terminal device after receiving the second measurement event and before performing the first measurement event.

Step 404, the terminal device determines whether the following conditions are satisfied at the same time: the second measurement results satisfy the B1 threshold, and the RSRP value of the serving cell is less than or equal to the first RSRP threshold, and the RSRQ value of the serving cell is less than or equal to the first RSRQ threshold.

For example, reference may be made to the example of step 307, which is not repeated here for brevity.

Alternatively to step 404, as another implementation, if the following conditions are not met at the same time: the second measurement result satisfies the B1 threshold, the RSRP value of the serving cell is less than or equal to the first RSRP threshold, and the RSRQ value of the serving cell is less than or equal to the first RSRQ threshold, then step 405 is performed.

For example, assuming that the terminal device moves to the coverage area of the NR network, the terminal device measures the signal quality enhancement of the current serving cell, for example, the RSRP value of the serving cell is greater than the first RSRP threshold and/or the RSRQ value of the serving cell is greater than the first RSRQ threshold, the B1 measurement report is not reported, i.e. if the signal quality enhancement of the current serving cell is met, the B1 measurement report is not reported even if the B1 measurement threshold is met.

It should be understood that the determination condition shown in step 404 is only one example description of reporting the measurement report of the B1 measurement event in the embodiment of the present application, and the embodiment of the present application is not limited thereto. For example, the judgment conditions shown in step 404 may be replaced with: the second measurement results satisfy the B1 threshold, and the RSRP value of the serving cell is less than or equal to the first RSRP threshold. For another example, the judgment condition shown in step 307 may be replaced with: the second measurement meets the B1 threshold and the RSRQ value of the serving cell is less than or equal to the first RSRQ threshold.

In step 405, the terminal device does not report the measurement report of the first measurement event and continues to camp on the current serving cell.

Illustratively, in this scenario, the access network device issues a B1 measurement event to the terminal device without the terminal device reporting an A2 measurement report. Before performing the B1 measurement, the terminal device measures that the signal quality of the current serving cell is enhanced (e.g., the RSRP value of the serving cell is greater than the first RSRP threshold and/or the RSRQ value of the serving cell is greater than the first RSRQ threshold), then no B1 measurement report is reported at this time. In the prior art, when judging whether to report the B1 measurement report, the signal quality of the current serving cell is not considered, that is, the prior art reports the B1 measurement report when meeting the B1 reporting condition. In the embodiment of the present application, after receiving the B1 measurement event, if the signal quality of the serving cell is enhanced (for example, the RSRP value of the serving cell is greater than the first RSRP threshold value and/or the RSRQ value of the serving cell is greater than the first RSRQ threshold value), the B1 measurement report is not reported even if the B1 reporting condition is satisfied, thereby avoiding the terminal device from switching from the cell with better signal coverage to the cell with poor signal.

Alternatively to step 404, as another implementation, if the following conditions are simultaneously met: the second measurement result satisfies the B1 measurement threshold, and the RSRP value of the serving cell is less than or equal to the first RSRP threshold, and the RSRQ value of the serving cell is less than or equal to the first RSRQ threshold, then steps 406 to 408 are performed.

In step 406, the terminal device reports the measurement report of the first measurement event (i.e. the measurement report of the B1 measurement event) to the access network device.

Step 407, the access network device sends a handover command to the terminal device after receiving the measurement report of the first measurement event. Correspondingly, the terminal equipment receives a switching command. The switching command is used for indicating the terminal equipment to switch from the current service cell to the adjacent cell.

In step 408, the terminal device switches from the current serving cell to the neighboring cell according to the switch command.

The above description of steps 406 to 408 may refer to the descriptions of steps 308 to 310, and are not repeated here for brevity.

The technical effect of the embodiment of the application is particularly remarkable for the scene of issuing the first measurement event when the access network equipment is abnormal. Specifically, if the access network device does not receive the measurement report of the second measurement event, it indicates that the signal of the serving cell where the terminal device is located is better, and at this time, the terminal device is not required to be instructed to perform different system measurement, and the terminal device is switched to the neighboring cell. However, due to the exception of the access network device, when the measurement report of the second measurement event reported by the terminal device is not received, the first measurement event is still issued to the access network device. In this case, if the terminal device determines that the reporting condition of the measurement report of the first measurement event is not satisfied (i.e., when the first measurement result does not satisfy the first preset condition and/or the second measurement result does not satisfy the second preset condition), the measurement report of the first measurement event may not be reported, thereby avoiding the terminal device from switching from the cell with better signal to the cell with worse signal.

It should be understood that the flowcharts or interaction diagrams shown in fig. 2-4 are merely for ease of understanding and are not intended to limit embodiments of the present application to the examples shown in the figures. Indeed, those skilled in the art will appreciate that many more implementations are possible, based on the examples of FIGS. 2-4.

The method for cell handover provided by the embodiment of the present application is described in detail above with reference to fig. 1 to 4. An embodiment of the device of the present application will be described in detail below with reference to fig. 5 to 7. It should be understood that the communication device according to the embodiment of the present application may perform the various communication methods according to the foregoing embodiments of the present application, that is, specific working procedures of various products below may refer to corresponding procedures in the foregoing method embodiments.

In the above embodiments, the terminal device may perform some or all of the steps in the embodiments. These steps or operations are merely examples, and embodiments of the present application may perform other operations or variations of the various operations. Furthermore, the various steps may be performed in a different order than presented in the various embodiments, and it is possible that not all of the operations in the embodiments of the application may be performed. The sequence number of each step does not mean the sequence of execution sequence, and the execution sequence of each process should be determined by its function and internal logic, and should not be limited in any way to the implementation process of the embodiment of the present application.

Fig. 5 is a schematic block diagram of a communication device provided by an embodiment of the present application. As shown in fig. 5, the communication device 1400 may include a transceiver unit 1410 and a processing unit 1420.

In one possible design, the communication device 1400 may correspond to a terminal device in the above method embodiments, or a component (e.g., a circuit, a chip, or a system-on-chip) configured in the terminal device.

In some embodiments, the transceiver unit 1410 is configured to receive a first measurement event from an access network device, where the first measurement event is used to measure a signal quality of a neighboring cell;

the processing unit 1420 is configured to obtain a first measurement result, where the first measurement result is a measurement result of signal quality of a serving cell where the terminal device currently resides;

the processing unit 1420 is further configured to measure, according to the first measurement event, a neighboring cell of the terminal device, and obtain a second measurement result, where the second measurement result is a measurement result of signal quality of the neighboring cell;

The transceiver unit 1410 is further configured to report a measurement report of the first measurement event to the access network device when the first measurement result meets a first preset condition and the second measurement result meets a second preset condition.

Optionally, as an embodiment, the processing unit 1420 is further configured to not report a measurement report of the first measurement event or continue to camp on the serving cell when the first measurement result does not meet a first preset condition, and/or the second measurement result does not meet the second preset condition.

Optionally, as an embodiment, the first measurement result meets a first preset condition, including: the reference signal received power, RSRP, value of the serving cell is less than or equal to the first RSRP threshold and/or the reference signal received quality, RSRQ, value of the serving cell is less than or equal to the first RSRQ threshold.

Optionally, as an embodiment, the first RSRP threshold and the first RSRQ threshold are preset threshold values.

Optionally, as an embodiment, the second measurement result meets a second preset condition, including: the RSRP value of the neighboring cell is greater than the second RSRP threshold and/or the RSRQ value of the neighboring cell is greater than the second RSRQ value.

Optionally, as an embodiment, the transceiver unit 1410 is further configured to receive a handover command from the access network device after reporting a measurement report of the first measurement event to the access network device;

The processing unit 1420 is further configured to switch from the serving cell to the neighbor cell according to the handover command.

Optionally, as an embodiment, the transceiver unit 1410 is further configured to receive a second measurement event from the access network device before receiving the first measurement event from the access network device, where the second measurement event is used to measure a signal quality of a serving cell;

The processing unit 1420 is further configured to measure a serving cell of the terminal device according to the second measurement event, to obtain a third measurement result;

The processing unit 1420 is further configured to not report, when the third measurement result does not meet the reporting condition of the second measurement event, a measurement report of the second measurement event to the access network device.

Alternatively, as an embodiment, the first measurement result refers to: the terminal device measures a measurement result of the signal quality of the serving cell after receiving the second measurement event and before performing the first measurement event.

Optionally, as an embodiment, the transceiver unit 1410 is further configured to, before the receiving a first measurement event from an access network device, report, when the third measurement result meets a reporting condition of the second measurement event, a measurement report of the second measurement event to the access network device.

Optionally, as an embodiment, the first measurement result refers to a measurement result of signal quality of the serving cell measured by the terminal device after the terminal device reports a measurement report of the second measurement event and before the first measurement event is performed.

Optionally, as an embodiment, the third measurement result meets a reporting condition of the second measurement event, including: the RSRP value of the serving cell is less than or equal to the third RSRP threshold and/or the RSRQ value of the serving cell is less than or equal to the third RSRQ threshold.

Optionally, as an embodiment, the serving cell of the terminal device is an NR cell, and the neighbor cell is an LTE cell.

It is to be understood that the communication apparatus 1400 may correspond to the terminal device in the method of fig. 2 to 4 according to an embodiment of the present application, and the communication apparatus 1400 may include means for performing the method performed by the terminal device of fig. 2 to 4. And, each unit in the communication device 1400 and the other operations and/or functions described above are respectively for implementing the corresponding flows of fig. 2 to 4.

It should also be appreciated that when the communication device 1400 is a terminal device, the transceiver unit 1410 in the communication device 1400 may be implemented by a transceiver, for example, may correspond to the transceiver 1520 in the communication device 1500 shown in fig. 6. The processing unit 1420 in the communication device 1400 may be implemented by at least one processor, for example, may correspond to the processor 1510 in the communication device 1500 shown in fig. 6.

It should be further understood that, when the communication device 1400 is a chip or a chip system configured in the above-mentioned terminal equipment, the transceiver 1410 in the communication device 1400 may be implemented through an input/output interface, and the processing unit 1420 in the communication device 1400 may be implemented through a processor, a microprocessor, an integrated circuit, or the like integrated on the chip or the chip system.

In one possible design, the communication apparatus 1400 may correspond to the access network device in the above method embodiments, or be configured as a component (e.g., a circuit, chip, or system-on-chip, etc.) in the access network device.

In some embodiments, the transceiver unit 1410 is configured to send a first measurement event to a terminal device, where the first measurement event is used by the terminal device to measure signal quality of a neighboring cell; the transceiver unit 1410 is further configured to receive a measurement report of a first measurement event, where the measurement report of the first measurement event is reported by a terminal device when a first measurement result meets a first preset condition and the second measurement result meets a second preset condition, and the first measurement result is a measurement result of signal quality of a serving cell where the terminal device currently resides, and the second measurement result is a measurement result of signal quality of the neighboring cell.

Optionally, the serving cell of the terminal device is an NR cell, and the neighbor cell is an LTE cell.

Optionally, as an embodiment, the transceiver unit 1410 is further configured to, after receiving a measurement report of the first measurement event from the terminal device, issue a handover command to the terminal device, where the handover command is used to instruct the terminal device to handover from the serving cell to the neighboring cell.

Optionally, as an embodiment, the transceiver unit 1410 is further configured to send a second measurement event (i.e. an A2 measurement event) to the terminal device before the access network device issues the first measurement event, where the second measurement event is used by the terminal device to measure the signal quality of the serving cell.

Optionally, as an embodiment, the transceiver unit 1410 is further configured to receive a measurement report (A2 measurement report) of a second measurement event reported by the terminal device, where the measurement report of the second measurement event is reported by the terminal device when a third measurement result meets a reporting condition of the second measurement event. The third measurement result is a result of the terminal device measuring the serving cell of the terminal device according to the second measurement event.

It is to be understood that the communication apparatus 1400 may correspond to the access network device in the method 200 according to an embodiment of the application, and that the communication apparatus 1400 may comprise means for performing the method performed by the access network device in the method of fig. 2-4. And, each element in the communication apparatus 1400 and the other operations and/or functions described above are respectively for implementing the corresponding flow executed by the access network device in the methods of fig. 2-4.

It should also be appreciated that when the communication apparatus 1400 is an access network device, the transceiver unit 1410 in the communication apparatus 1400 may be implemented by a transceiver, for example, may correspond to the transceiver 1520 in the communication apparatus 1500 shown in fig. 6 or the RRU 1610 in the base station 1600 shown in fig. 7. The processing unit 1420 in the communication device 1400 may be implemented by at least one processor, e.g. may correspond to the processor 1510 in the communication device 1500 shown in fig. 6 or the BBU 1620 in the base station 1600 shown in fig. 7.

It should be further understood that, when the communication apparatus 1400 is a chip or a chip system configured in the above access network device, the transceiver 1410 in the communication apparatus 1400 may be implemented by an input/output interface, and the processing unit 1420 in the communication apparatus 1400 may be implemented by a processor, a microprocessor, an integrated circuit, or the like integrated on the chip or the chip system.

Fig. 6 is another schematic block diagram of a communication device 1500 provided by an embodiment of the present application. As shown in fig. 6, the communication device 1500 includes a processor 1510, a transceiver 1520, and a memory 1530. Wherein the processor 1510, the transceiver 1520 and the memory 1530 communicate with each other through an internal connection path, the memory 1530 is for storing instructions, and the processor 1510 is for executing the instructions stored in the memory 1530 to control the transceiver 1520 to transmit signals and/or receive signals.

The memory 1530 may optionally include read only memory and random access memory, and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. The memory 1530 may be a separate device or may be integrated within the processor 1510.

In one implementation, the communications apparatus 1500 can correspond to a terminal device in a method embodiment described above and can be configured to perform various steps and/or processes performed by the terminal device in a method embodiment described above. The processor 1510 may be configured to execute instructions stored in the memory 1530 and, when the processor 1510 executes the instructions stored in the memory, the processor 1510 is configured to perform the steps and/or flows of the method embodiments described above with respect to the terminal device.

Alternatively, the communication apparatus 1500 may be an access network device in the foregoing embodiment, and may be configured to perform the steps and/or flows performed by the access network device in the foregoing method embodiment. The processor 1510 may be configured to execute instructions stored in the memory 1530 and, when the processor 1510 executes the instructions stored in the memory, the processor 1510 is configured to perform the steps and/or flows of the method embodiments described above with respect to the access network device.

The transceiver 1520 may include a transmitter and a receiver. The transceiver 1520 may further include antennas, the number of which may be one or more. The processor 1510 and memory 1530 and the transceiver 1520 may be devices integrated on different chips. For example, the processor 1510 and the memory 1530 may be integrated in a baseband chip, and the transceiver 1520 may be integrated in a radio frequency chip. The processor 1510 and memory 1530 may also be devices integrated on the same chip as the transceiver 1520. The application is not limited in this regard.

Alternatively, the communication apparatus 1500 may be a component configured in an access network device, such as a chip, a chip system, or the like.

The transceiver 1520 may also be a communication interface such as an input/output interface. The transceiver 1520 may be integrated in the same chip as the processor 1510 and the memory 1520, such as in a baseband chip.

Fig. 7 is a schematic structural diagram of an access network device, which may be, for example, a schematic structural diagram of a base station, according to an embodiment of the present application. The base station 1600 may be applied in the system shown in fig. 1, and perform the functions of the target access network device or the source access network device in the above method embodiment. As shown, the base station 1600 may include one or more radio frequency units, such as a remote radio frequency unit (remote radio unit, RRU) 1610 and one or more baseband units (bbus) (also referred to as distributed units (dus)) 1620.

The RRU 1610 may be referred to as a transceiver unit, and corresponds to the transceiver unit 1420 in fig. 5. Alternatively, the transceiver unit 1610 may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 1611 and a radio frequency unit 1612. Alternatively, the transceiver 1610 may include a receiving unit, which may correspond to a receiver (or receiver, receiving circuit), and a transmitting unit, which may correspond to a transmitter (or transmitter, transmitting circuit). The RRU 1610 part is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals into baseband signals, for example, for transmitting data packets to a terminal device. The BBU 1620 is mainly used for baseband processing, control of a base station, and the like. The RRU 1610 and BBU 1620 may be physically located together or may be physically separate, i.e., a distributed base station.

The BBU 1620 is a control center of a base station, and may also be referred to as a processing unit, and may correspond to the processing unit 1410 in fig. 5, and is mainly configured to perform baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and so on. For example, the BBU (processing unit) may be configured to control the base station to perform the operation procedure in the method embodiment described above with respect to the access network device, e.g. generate the first configuration parameter information described above, etc.

In one example, the BBU 1620 may be configured by one or more boards, where the multiple boards may support a single access radio access network (such as an LTE network) together, or may support different access radio access networks (such as an LTE network, a 5G network, a 6G network, or other networks) respectively. The BBU 1620 also includes a memory 1621 and a processor 1622. The memory 1621 is used to store the necessary instructions and data. The processor 1622 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation procedures related to the network device in the above-described method embodiment. The memory 1621 and processor 1622 may be implemented to service one or more boards. That is, the memory and the processor may be separately provided on each board. It is also possible that multiple boards share the same memory and processor. In addition, each single board can be provided with necessary circuits.

It should be appreciated that the base station 1600 shown in fig. 7 is capable of implementing the various procedures of the access network device involved in the method embodiment of fig. 2. The operations and/or functions of the respective modules in the base station 1600 are respectively for implementing the corresponding flows in the above-described method embodiments. Reference is specifically made to the description in the above method embodiments, and detailed descriptions are omitted here as appropriate to avoid repetition.

The BBU 1620 described above may be used to perform actions described in the method embodiments above as being implemented internally by the access network device, while the RRU 1610 may be used to perform actions described in the method embodiments above as being sent to or received from the access network device, for example actions sent to or received from the terminal device. Please refer to the description of the foregoing method embodiments, and details are not repeated herein.

The embodiment of the application also provides a processing device, which comprises a processor and an interface; the processor is configured to perform the method of communicating in any of the method embodiments described above.

It should be understood that the processing means described above may be one or more chips. For example, the processing device may be a field programmable gate array (field programmable GATE ARRAY, FPGA), an Application Specific Integrated Chip (ASIC), a system on chip (SoC), a central processing unit (central processor unit, CPU), a network processor (network processor, NP), a digital signal processing circuit (DIGITAL SIGNAL processor, DSP), a microcontroller (micro controller unit, MCU), a programmable controller (programmable logic device, PLD) or other integrated chip.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method. To avoid repetition, a detailed description is not provided herein.

It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip with signal processing capability. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, or discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the application may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an erasable programmable ROM (erasable PROM), an electrically erasable programmable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (STATIC RAM, SRAM), dynamic random access memory (DYNAMIC RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (double DATA RATE SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCHLINK DRAM, SLDRAM), and direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

According to a method provided by an embodiment of the present application, the present application also provides a computer program product, including: computer program code which, when run on a computer, causes the computer to perform the method of the embodiment shown in fig. 2 or any of the embodiments above.

According to the method provided by the embodiment of the application, the application further provides a computer readable storage medium, wherein the computer readable storage medium stores a program code, and when the program code runs on a computer, the program code causes the computer to execute the method of the embodiment shown in fig. 2 or any one of the embodiments.

The computer readable storage medium may be volatile memory or nonvolatile memory, or may include both volatile memory and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an erasable programmable ROM (erasable PROM), an electrically erasable programmable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (STATIC RAM, SRAM), dynamic random access memory (DYNAMIC RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (double DATA RATE SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCHLINK DRAM, SLDRAM), and direct memory bus random access memory (direct rambus RAM, DR RAM).

According to the method provided by the embodiment of the application, the application also provides a communication system which comprises one or more of the terminal equipment and the access network equipment.

Optionally, the communication system may also comprise other devices communicating with the terminal device and/or the access network device.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a solid-state disk (solid-state drive STATE DISC, SSD)), or the like.

The terminal device in the above-mentioned respective apparatus embodiments corresponds to the access network device completely, and the terminal device in the method embodiments corresponds to the access network device, and the corresponding steps are performed by corresponding modules or units, for example, the steps of receiving or transmitting in the method embodiments are performed by a communication unit (transceiver), and other steps except for transmitting and receiving may be performed by a processing unit (processor). Reference may be made to corresponding method embodiments for the function of a specific unit. Wherein the processor may be one or more.

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components may reside within a process and/or thread of execution and a component may be localized on one computer and/or distributed between 2 or more computers. Furthermore, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with one another in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, or other various media capable of storing program codes.

It should be understood that, in various embodiments of the present application, the size of the sequence number of each process does not mean that the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

In addition, the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely one association relationship describing the associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship. For example, A/B may represent A or B.

The terms (or numbers) of "first," "second," …, etc. in the embodiments of the present application are used for descriptive purposes only and are only for distinguishing between different objects, such as different "measurements" or the like, and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of technical features indicated. Thus, features defining "first," "second," …, etc., may explicitly or implicitly include one or more features. In the description of embodiments of the application, "at least one (an item)" means one or more. The meaning of "plurality" is two or more. "at least one of (an) or the like" below means any combination of these items, including any combination of a single (an) or a plurality (an) of items.

For example, items appearing similar to "in embodiments of the application include at least one of: the meaning of the expressions a, B, and C "generally means that the item may be any one of the following unless otherwise specified: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; a, B and C; a and A; a, A and A; a, A and B; a, a and C, a, B and B; a, C and C; b and B, B and C, C and C; c, C and C, and other combinations of a, B and C. The above is an optional entry for the item exemplified by 3 elements a, B and C, when expressed as "the item includes at least one of the following: a, B, … …, and X ", i.e., when there are more elements in the expression, then the entry to which the item is applicable may also be obtained according to the rules described above.

In summary, the foregoing description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for cell handover, the method being applied to a terminal device, the method comprising:

receiving a second measurement event, wherein the second measurement event is used for measuring the signal quality of a serving cell;

Measuring the current service cell according to the second measurement event to obtain a first measurement result;

reporting a measurement report of the second measurement event when the reporting condition of the second measurement event is met;

After reporting the measurement report of the second measurement event, receiving a first measurement event from access network equipment;

measuring the neighbor cell based on the first measurement event to obtain a second measurement result, and measuring the current serving cell again based on the second measurement event to obtain a third measurement result;

when the third measurement result does not meet the first preset condition and/or the second measurement result does not meet the second preset condition, not reporting a measurement report of the first measurement event or continuing to reside in the service cell;

when the reporting condition of the second measurement event is not met, not reporting the measurement report of the second measurement event;

Receiving a first measurement event from access network equipment under the condition that a measurement report of the second measurement event is not reported, wherein the first measurement event is used for measuring the signal quality of a neighbor cell; acquiring the first measurement result, wherein the first measurement result refers to a measurement result of signal quality of a serving cell where the terminal equipment currently resides;

according to the first measurement event, measuring a neighbor cell of the terminal equipment to obtain a second measurement result, wherein the second measurement result is a measurement result of signal quality of the neighbor cell;

Reporting a measurement report of the first measurement event to the access network equipment when the first measurement result meets a first preset condition and the second measurement result meets a second preset condition;

2. The method of claim 1, wherein the first measurement result satisfies a first preset condition, comprising: the reference signal received power, RSRP, value of the serving cell is less than or equal to the first RSRP threshold and/or the reference signal received quality, RSRQ, value of the serving cell is less than or equal to the first RSRQ threshold.

3. The method of claim 2, wherein the first RSRP threshold and the first RSRQ threshold are preset thresholds.

4. A method according to any one of claims 1 to 3, wherein the second measurement result satisfies a second preset condition, comprising: the RSRP value of the neighboring cell is greater than the second RSRP threshold and/or the RSRQ value of the neighboring cell is greater than the second RSRQ value.

5. The method according to any of claims 1 to 4, wherein after reporting the measurement report of the first measurement event to the access network device, the method further comprises:

Receiving a switching command from the access network equipment;

6. The method of claim 1, wherein the first measurement is: the terminal device measures a measurement result of the signal quality of the serving cell after receiving the second measurement event and before performing the first measurement event.

7. The method according to claim 1, wherein the first measurement result is a measurement result of the signal quality of the serving cell measured by the terminal device after the terminal device reports the measurement report of the second measurement event and before the first measurement event is performed.

8. The method of claim 1, wherein the first measurement result satisfies a reporting condition of the second measurement event, comprising: the RSRP value of the serving cell is less than or equal to the third RSRP threshold and/or the RSRQ value of the serving cell is less than or equal to the third RSRQ threshold.

9. The method of claim 1, wherein the serving cell of the terminal device is a new wireless NR cell and the neighbor cell is a long term evolution, LTE, cell.

10. A communication device, characterized by comprising means for implementing the method according to any of claims 1 to 9.

11. A communication device, comprising:

a processor for executing computer instructions stored in a memory to cause the apparatus to perform: the method of any one of claims 1 to 9.

12. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program, which when executed by a processor causes the processor to perform the method of any one of claims 1 to 9.

13. A chip comprising a processor which, when executing instructions, performs the method of any of claims 1 to 9.