CN112789890A

CN112789890A - Data forwarding method, equipment and storage medium

Info

Publication number: CN112789890A
Application number: CN201980064559.1A
Authority: CN
Inventors: 尤心; 卢前溪
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-02-25
Filing date: 2019-02-25
Publication date: 2021-05-11
Also published as: WO2020172776A1

Abstract

The invention discloses a data forwarding method, which comprises the following steps: the method comprises the steps that terminal equipment receives first information, the first information is used for indicating the terminal equipment to send first indication information to source network equipment when a first condition is met, and the first indication information is used for indicating the source network equipment to forward data to target network equipment; the first condition relates to a parameter of a source cell and/or a target cell of a handover triggered based on the condition, the target cell corresponding to the target network device, the source cell corresponding to the source network device. The invention also discloses another data forwarding method, equipment and a storage medium.

Description

Data forwarding method, equipment and storage medium

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a data forwarding method, device, and storage medium.

Background

In the related art, for conditional cell handover (conditional handover), a source network device may configure a handover command for the terminal device for the conditional handover for at least two target network devices, and the source network device may initiate a handover request to one or at least two target network devices. However, the source network device cannot predict to which target network device the terminal device initiates the cell handover when the handover trigger condition is satisfied, so that the source network device cannot forward data with the target network device after the terminal device performs the cell handover.

Disclosure of Invention

To solve the foregoing technical problem, embodiments of the present invention provide a data forwarding method, device and storage medium, which can implement data forwarding between a source network device and a target network device when a terminal device performs cell switching based on conditions.

In a first aspect, an embodiment of the present invention provides a data forwarding method, including: the method comprises the steps that terminal equipment receives first information, the first information is used for indicating the terminal equipment to send first indication information to source network equipment when a first condition is met, and the first indication information is used for indicating the source network equipment to forward data to target network equipment; the first condition is related to a parameter of a source cell and/or a target cell of a conditional handover, the target cell corresponds to the target network device, and the source cell corresponds to the source network device.

In a second aspect, an embodiment of the present invention provides a data forwarding method, including: a source network device sends first information to a terminal device, wherein the first information is used for indicating the terminal device to send first indication information to the source network device when a first condition is met, and the first indication information is used for indicating the source network device to forward data to a target network device; the first condition is related to a parameter of a source cell and/or a target cell of a conditional handover, the target cell corresponds to the target network device, and the source cell corresponds to the source network device.

In a third aspect, an embodiment of the present invention provides a terminal device, including: a first receiving unit, configured to receive first information, where the first information is used to instruct the terminal device to send first instruction information to a source network device when a first condition is met, and the first instruction information is used to instruct the source network device to forward data to a target network device; the first condition is related to a parameter of a source cell and/or a target cell of a conditional handover, the target cell corresponds to the target network device, and the source cell corresponds to the source network device.

In a fourth aspect, an embodiment of the present invention provides a source network device, including: a third sending unit, configured to send first information to a terminal device, where the first information is used to indicate that the terminal device sends first indication information to the source network device when a first condition is met, and the first indication information is used to indicate that the source network device forwards data to a target network device; the first condition is related to a parameter of a source cell and/or a target cell of a conditional handover, the target cell corresponds to the target network device, and the source cell corresponds to the source network device.

In a fifth aspect, an embodiment of the present invention provides a terminal device, including a processor and a memory, where the memory is used for storing a computer program that can be executed on the processor, and the processor is configured to execute, when executing the computer program, the steps of the data forwarding method executed by the terminal device.

In a sixth aspect, an embodiment of the present invention provides a storage medium, where an executable program is stored, and when the executable program is executed by a processor, the data forwarding method executed by the source network device is implemented.

The data forwarding method provided by the embodiment of the invention comprises the following steps: the method comprises the steps that terminal equipment receives first information, the first information is used for indicating the terminal equipment to send first indication information to source network equipment when a first condition is met, and the first indication information is used for indicating the source network equipment to forward data to target network equipment; the first condition is related to a parameter of a source cell and/or a target cell of a conditional handover, the target cell corresponds to the target network device, and the source cell corresponds to the source network device. The first indication information sent by the terminal equipment to the source network equipment indicates the source network equipment to forward data to the target network equipment, so that the source network equipment can determine the target network equipment for forwarding the data; when the terminal equipment performs the conditional handover, the source network equipment can reduce the range of the target network equipment for data forwarding by the source network equipment, so that signaling overhead is saved, larger data terminal time delay in the conditional handover is avoided, and user experience is improved.

Drawings

FIG. 1 is a schematic diagram of a cell handover process according to the present invention;

FIG. 2 is a schematic view of a conditional hand flow according to the present invention;

FIG. 3 is a block diagram of a communication system according to an embodiment of the present invention;

fig. 4 is a schematic view of an alternative processing flow of a data forwarding method applied to a terminal device according to an embodiment of the present invention;

fig. 5 is a schematic diagram of an alternative processing flow of a data forwarding method applied to a source network device according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a source network device according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a hardware component structure of an electronic device according to an embodiment of the present invention.

Detailed Description

So that the manner in which the features and technical contents of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the present invention will be rendered by reference to the appended drawings, which are included for purposes of illustration and not limitation.

Before describing the data forwarding method provided by the embodiment of the present invention in detail, a cell switching process and a data forwarding method after cell switching in the related art are briefly described.

Currently, with the pursuit of speed, delay, high-speed mobility, energy efficiency, and diversity and complexity of services in future life, the 3GPP international standards organization has begun to develop 5G. The main application scenarios of 5G are: enhanced Mobile Ultra wide band (eMBB), Low Latency high reliability Communications (URLLC), and Massive Machine Type Communications (mMTC).

The eMBB still targets users to obtain multimedia content, services and data, and its demand is growing very rapidly. On the other hand, because the eMBB may be deployed in different scenarios, such as indoor, urban, rural, etc., and the difference between the capabilities and the requirements is relatively large, it cannot be said in a general way, and it is necessary to analyze in detail in combination with a specific deployment scenario. Typical applications of URLLC include: industrial automation, electric power automation, remote medical operation (surgery), traffic safety, and the like. Typical characteristics of mtc include: high connection density, small data volume, insensitive time delay service, low cost and long service life of the module, etc.

Similar to the LTE system, a New radio (New ratio, NR) system supports a handover procedure of a connected terminal device. When a terminal device using network service moves from one cell to another cell, or due to reasons such as adjustment of wireless transmission service load, activation of operation maintenance, device failure, etc., in order to ensure communication continuity and service quality, the system needs to transfer a communication link between the terminal device and an original cell to a new cell, i.e., to perform a handover procedure.

Taking an Xn interface handover process as an example, as shown in fig. 1, a cell handover process is divided into the following three stages:

phase 1 (including steps 1 to 5), handover preparation: including measurement control and reporting, handover requests and acknowledgements

Stage 2 (comprising steps 6 to 8), the handover is performed: the terminal equipment immediately executes the switching process after receiving the switching command, namely the terminal equipment disconnects the source cell and is connected with the target cell (for example, random access is executed, and an RRC switching completion message is sent to the target network equipment and the like); and (4) state transfer and data forwarding of a Secondary Node (SN).

Stage 3 (including steps 9 to 12), handover complete: the target cell and (AMF) and the User Plane Function (UPF) perform Path switching (Path Switch), releasing the terminal device context of the source network device.

In terms of network implementation, the source network device may initiate handover preparation or request messages for multiple target cells simultaneously or sequentially according to the measurement report (including the measurement results of multiple cells) of the terminal device; specifically, the source network device may initiate a handover preparation or request message based on a direct connection X2/Xn interface, or through an S1/N2 interface between Mobility Management Entities (MMEs)/AMFs. After receiving the handover preparation/request message, each target cell performs access control according to its own RRM algorithm, and sends a handover request response message (which is a response to a handover request failure message if access control fails) to the network device where the source cell is located under the premise of access control, where the handover request response message carries a handover command generated by the target cell. And the source network equipment selects one of the target cells returning the switching response as a final switching target cell according to the RRM algorithm of the source network equipment, and sends a switching command corresponding to the target cell to the terminal equipment through the RRC reconfiguration message, so that the network equipment can completely control the switching process.

The handover process triggered by the measurement report of the terminal device is mainly the management of the network device for the mobility connection of the terminal device, so that the terminal device keeps the continuity of the current transmission service when moving to the cell boundary and entering a new cell. Unlike such handover triggering conditions, LTE and NR systems also support blind handover procedures. One of the triggering conditions for blind handover is based on load balancing considerations at the network side, e.g. when the current serving cell is congested, the serving cell may handover one or more connected state terminal devices to other less loaded cells, even if the terminal devices do not actually move to the cell border. The existing X2 and Xn interfaces already support interaction of load information of respective cells between different base stations, so that a serving cell can obtain load conditions of other neighboring cells and decide whether to perform blind handover on a part of terminal devices according to respective load comparisons.

For the problems of frequent handover and easy failure of handover in high-speed mobile scenarios and high-frequency deployment scenarios, 3GPP is currently discussing the introduction of conditional handover (conditional handover) for LTE and NR systems. As shown in fig. 2, when evaluating the condition trigger related to the target cell, the terminal device performs handover to the target cell according to a pre-configured handover command (i.e., triggering a random access procedure and sending a handover completion message) according to the condition configured by the network device, so as to avoid the problem that the measurement report cannot be sent or the handover command cannot be sent due to high-speed movement entering a coverage area. In the conditional handover, the source network device cannot predict to which target network device the terminal device initiates cell handover when the handover triggering condition is met; at this time, if the source network device forwards data to all of the plurality of target network devices, additional network overhead may be caused; if the source network device receives an instruction sent by the target network device and then forwards data to the target network device after the terminal device accesses the target cell, a larger data interruption time delay may be caused by a Random Access Channel (RACH) process in a conditional handover, which affects user experience.

Based on the above problem, the present invention provides a data forwarding method, and the data forwarding method in the embodiments of the present application may be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, or a 5G System.

Illustratively, a communication system 100 applied in the embodiment of the present application is shown in fig. 3. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, a terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area. Optionally, the Network device 110 may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN), or may be a Network device in a Mobile switching center, a relay Station, an Access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a Network-side device in a 5G Network, or a Network device in a Public Land Mobile Network (PLMN) for future evolution, or the like.

The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. As used herein, "terminal equipment" includes, but is not limited to, connections via wireline, such as Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, direct cable connection; and/or another data connection/network; and/or via a Wireless interface, e.g., to a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter; and/or means of another terminal device arranged to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A terminal device arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. Terminal Equipment may refer to an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, User terminal, wireless communication device, User agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having Wireless communication capabilities, 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 a terminal device in a future evolved PLMN, etc.

Optionally, a Device to Device (D2D) communication may be performed between the terminal devices 120.

Alternatively, the 5G system or the 5G network may also be referred to as a New Radio (NR) system or an NR network.

Fig. 3 exemplarily shows one network device and two terminal devices, and optionally, the communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage of each network device, which is not limited in this embodiment of the present application.

Optionally, the communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that a device having a communication function in a network/system in the embodiments of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 3 as an example, the communication device may include a network device 110 and a terminal device 120 having a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above, which are not described herein again; the communication device may also include other devices in the communication system 100, such as other network entities, for example, a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

As shown in fig. 4, an optional processing flow of the data forwarding method applied to the terminal device provided in the embodiment of the present invention includes the following steps:

step S201, a terminal device receives first information, where the first information is used to indicate that the terminal device sends first indication information to a source network device when a first condition is met.

In some embodiments, the first condition is a condition that the source network device forwards data to the target network device when the network device configures a switching command of a conditional handover for the terminal device and when the conditional handover is configured for the terminal device; the first condition is related to a parameter of a source cell and/or a target cell of a conditional handover triggered based on the condition, the target cell corresponds to the target network device, and the source cell corresponds to the source network device. The network device is a source network device currently serving the terminal device, or the network device is a network device previously serving the terminal device.

Optionally, the parameters of the source cell and/or the target cell of the conditional handover triggered based on the first condition are: signal quality of the source cell and/or the target cell.

Taking the first condition related to the parameter of the target cell as an example, the first condition is: the signal quality of the target cell is greater than a first threshold value. Wherein the first threshold is a threshold of an A4 event; or the first threshold is a sum of a threshold of an a4 event configured by the source network device and a first relative value, and the a4 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover. Optionally, the first relative value is a negative value. For example, if the threshold value of the a4 event configured by the source network device is 3 and the first relative value is-2, the first threshold value is 1. When the signal quality of the target cell is greater than 1, the terminal device sends first indication information to the source network device.

Taking as an example that the first condition is related to parameters of the target cell and the source cell, the first condition is: the difference between the signal quality of the target cell and the signal quality of the source cell is greater than a second threshold value. Wherein the second threshold is a threshold of an A3 event; or the second threshold is a sum of a threshold value of an A3 event configured by the source network device and a second relative value, and the A3 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover. Optionally, the second relative value is a negative value.

Taking the first condition as an example related to the parameter of the source cell, the first condition is: the signal quality of the source cell is smaller than a third threshold value, and the signal quality of the target cell is larger than a fourth threshold value. Wherein the third threshold value and the fourth threshold value are threshold values of an A5 event; or the third threshold value and the fourth threshold value are the sum of a threshold value and a third relative value of an a5 event configured by the source network device, and an a5 event configured by the source network device is an event triggering the terminal device to execute a conditional handover. Optionally, the third relative value is a negative value. For example, the third relative values of the two threshold values of the a5 event corresponding to the source network device configuration are the same, the threshold values of the a5 event corresponding to the source network device configuration are 3 and 5, respectively, the third relative value is-2, the third threshold value is 1, and the fourth threshold value is 3. In a specific implementation, the third relative values of the two threshold values of the a5 event configured for the source network device may also be different, for example, if the threshold values of the a5 event configured for the source network device are 3 and 5, respectively, and the third relative values of the two threshold values of the a5 event configured for the source network device are-2 and-3, respectively, then the third threshold value is 1, and the fourth threshold value is 2.

Taking the first condition as an example related to the parameter of the source cell, the first condition is: the signal quality of the source cell is less than a fifth threshold value. Wherein the fifth threshold is a threshold of an a2 event; or the fifth threshold is a sum of a threshold of an a2 event configured by the source network device and a fourth relative value, and the a2 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover. Optionally, the fourth relative value is a negative value. In this way, when the link signal between the terminal device and the source network device is not good (or when the link between the terminal device and the source network device is about to be disconnected and still can communicate), the terminal device sends the first indication information to the source network device; the terminal device can report the measurement result of the terminal device to at least one target network device, such as channel quality; and the source network equipment selects one or more target network equipment with the best signal quality to forward data according to the measurement result reported by the terminal equipment. At this time, the source network device considers that the terminal device is about to switch to the target network device with good signal quality.

In this embodiment of the present invention, the first relative value, the second relative value, the third relative value, and the fourth relative value may all be configured to the terminal device by the source network device through a Radio Resource Control (RRC) signaling.

When the first condition is related to different parameters, the first condition further includes: the signal quality of the source cell is greater than a sixth threshold. The terminal equipment can report the first indication information to the source network equipment when the signal quality of the source cell is good, namely the source network equipment can receive the first indication information sent by the terminal equipment.

In an embodiment of the present invention, the signal quality includes at least one of: reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), and Signal to Noise Ratio (SNR).

The first condition is described above accordingly. When a first condition is met, the terminal device sends first indication information to a source network device, wherein the first indication information is used for indicating the source network device to forward data to a target network device. After receiving the first indication information, the source network equipment judges that the terminal equipment is about to initiate switching to a target cell; the source network equipment forwards data to the target network equipment according to the content in the first indication information; and when the switching triggering condition is met, the terminal equipment initiates the switching to the target cell. Before the switching triggering condition is met, the terminal equipment sends the first indication information to the source network equipment, so that the source network equipment can forward data to the target network equipment in time, the larger data terminal time delay in the conditional handover is avoided, and the user experience is improved.

In some embodiments, the first indication information is sent to the source network device by the terminal device through RRC signaling, or Media Access Control (MAC) signaling, or physical layer signaling. The first indication information includes: the number information of the target Cell, and/or the frequency point and the Physical Cell Identifier (PCI) of the target Cell. The source network equipment can determine which target cell the terminal equipment is switched to and the corresponding target network equipment according to the number information of the target cell and/or the frequency point and the PCI of the target cell; the source network device forwards the data to the determined target network device. Therefore, the first indication information is sent to the source network equipment by the terminal equipment, the range of data forwarding from the source network equipment to the target network equipment can be narrowed, and signaling overhead is saved.

In other embodiments, the first indication information further includes, in addition to number information of the target cell, and/or a frequency point and a PCI of the target cell: a signal quality of the target cell, and/or a signal quality of the source cell.

Optionally, the first indication information is a bye message.

In some optional embodiments, the method further comprises:

step S202, the terminal device sends first indication information to the source network device.

As shown in fig. 5, an optional processing flow of the data forwarding method applied to the source network device provided in the embodiment of the present invention includes:

step S301, a source network device sends first information to a terminal device, where the first information is used to indicate that the terminal device sends first indication information to the source network device when a first condition is met.

In some embodiments, the first indication information is used to instruct the source network device to forward data to a target network device; the first condition is related to a parameter of a source cell and/or a target cell of a conditional handover, the target cell corresponds to the target network device, and the source cell corresponds to the source network device.

Here, the description of the correlation based on the first condition and the first indication information is the same as the description of the correlation based on the first condition and the first indication information in step S201, and is not repeated here.

In particular implementations, the method further includes:

step S302, the source network device receives the first indication information sent by the terminal device.

In some embodiments, when the first indication information further carries a signal quality of at least one target network device, the source network device forwards data to one or more target network devices with the best signal quality among the at least one target network device. Or, the source network device forwards data to one of the at least one target network device with the best signal quality and the target network device indicated in the first indication information.

Step S303, the source network device forwards data to the target network device based on the first indication information.

An embodiment of the present invention provides a terminal device, where a structure of the terminal device 400, as shown in fig. 6, includes:

a first receiving unit 401, configured to receive first information, where the first information is used to instruct the terminal device to send first instruction information to a source network device when a first condition is met, and the first instruction information is used to instruct the source network device to forward data to a target network device;

the first condition is related to a parameter of a source cell and/or a target cell of a conditional handover, the target cell corresponds to the target network device, and the source cell corresponds to the source network device.

In some embodiments, the first condition comprises: the signal quality of the target cell is greater than a first threshold value. Wherein the first threshold is a threshold of an A4 event; or the first threshold is a sum of a threshold of an a4 event configured by the source network device and a first relative value, and the a4 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover.

In other embodiments, the first condition comprises: the difference between the signal quality of the target cell and the signal quality of the source cell is greater than a second threshold value. Wherein the second threshold is a threshold of an A3 event; or the second threshold is a sum of a threshold value of an A3 event configured by the source network device and a second relative value, and the A3 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover.

In still other embodiments, the first condition comprises: the signal quality of the source cell is smaller than a third threshold value, and the signal quality of the target cell is larger than a fourth threshold value. Wherein the third threshold value and the fourth threshold value are threshold values of an A5 event; or the third threshold value and the fourth threshold value are the sum of a threshold value and a third relative value of an a5 event configured by the source network device, and an a5 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover.

In still other embodiments, the first condition comprises: the signal quality of the source cell is less than a fifth threshold value. Wherein the fifth threshold is a threshold of an a2 event; or the fifth threshold is a sum of a threshold of an a2 event configured by the source network device and a fourth relative value, and the a2 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover.

Optionally, the first relative value, the second relative value, the third relative value, and the fourth relative value may be configured to the terminal device by the source network device through RRC signaling.

On the basis of the content included in the first condition, the first condition further includes: the signal quality of the source cell is greater than a sixth threshold.

In some embodiments, the signal quality comprises at least one of: RSRP, RSRQ, and SNR.

In some embodiments, the terminal device 400 further includes: a first sending unit 402, further configured to send the first indication information to the source network device.

In some embodiments, the terminal device 400 further includes: a second sending unit 403, configured to send, to the source network device, the signal quality of at least one target network device when the signal quality of the source cell is less than a sixth threshold value; the signal quality of the at least one target network device is used for the source network device to determine a target network device for forwarding data from the at least one target network device.

In some embodiments, the first indication information includes number information of the target cell, and/or a frequency point and a PCI of the target cell.

The first indication information includes, in addition to the number information of the target cell, and/or the frequency point and the PCI of the target cell, also: a signal quality of the target cell, and/or a signal quality of the source cell. The first indication information is carried in any one of the following signaling: RRC signaling, MAC signaling, and physical layer signaling.

An embodiment of the present invention further provides a source network device, where a structure of the source network device 500 is shown in fig. 7, and includes:

a third sending unit 501, configured to send first information to a terminal device, where the first information is used to instruct the terminal device to send first indication information to the source network device when a first condition is met, and the first indication information is used to instruct the source network device to forward data to a target network device; the first condition is related to a parameter of a source cell and/or a target cell of a conditional handover, the target cell corresponds to the target network device, and the source cell corresponds to the source network device.

In some embodiments, the source network device further includes a second receiving unit 502, further configured to receive the first indication information sent by the terminal device.

In some embodiments, the source network device further includes a third receiving unit 503, configured to receive the signal quality of the at least one target network device sent by the terminal device when the signal quality of the source cell is smaller than a sixth threshold value.

In some embodiments, the third sending unit 501 is further configured to forward data to a target network device with the best signal quality in the at least one target network device.

The embodiment of the present invention further provides a terminal device, which includes a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is configured to execute the steps of the data forwarding method executed by the terminal device when running the computer program.

The embodiment of the present invention further provides a source network device, which includes a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is configured to execute the steps of the data forwarding method executed by the source network device when running the computer program.

Fig. 8 is a schematic diagram of a hardware composition structure of electronic devices (a terminal device and a source network device) according to an embodiment of the present invention, where the terminal device 700 includes: at least one processor 701, a memory 702, and at least one network interface 704. The various components in the terminal device 700 are coupled together by a bus system 705. It is understood that the bus system 705 is used to enable communications among the components. The bus system 705 includes a power bus, a control bus, and a status signal bus in addition to a data bus. But for clarity of illustration the various busses are labeled in figure 8 as the bus system 705.

It will be appreciated that the memory 702 can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory. The non-volatile Memory may be ROM, Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), magnetic random access Memory (FRAM), Flash Memory (Flash Memory), magnetic surface Memory, optical Disc, or Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced DRAM), Synchronous Dynamic Random Access Memory (SLDRAM), Direct Memory (DRmb Access), and Random Access Memory (DRAM). The memory 702 described in connection with the embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.

The memory 702 in the embodiments of the present invention is used for storing various types of data to support the operation of the terminal device 700. Examples of such data include: any computer program for operating on the terminal device 700, such as the application program 7022. Programs that implement methods in accordance with embodiments of the present invention can be included within application program 7022.

The method disclosed in the above embodiments of the present invention may be applied to the processor 701, or implemented by the processor 701. The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 701. The Processor 701 may be a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The processor 701 may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed by the embodiment of the invention can be directly implemented by a hardware decoding processor, or can be implemented by combining hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the memory 702, and the processor 701 may read the information in the memory 702 and perform the steps of the aforementioned methods in conjunction with its hardware.

In an exemplary embodiment, the terminal Device 700 may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), FPGAs, general purpose processors, controllers, MCUs, MPUs, or other electronic components for performing the aforementioned methods.

The embodiment of the application also provides a storage medium for storing the computer program.

Optionally, the storage medium may be applied to the terminal device in the embodiment of the present application, and the computer program enables the computer to execute corresponding processes in each method in the embodiment of the present application, which is not described herein again for brevity.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

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

Claims

A method of data forwarding, the method comprising:

the method comprises the steps that terminal equipment receives first information, the first information is used for indicating the terminal equipment to send first indication information to source network equipment when a first condition is met, and the first indication information is used for indicating the source network equipment to forward data to target network equipment;

the first condition is related to a parameter of a source cell and/or a target cell of a conditional handover triggered based on the condition, the target cell corresponds to the target network device, and the source cell corresponds to the source network device.
The method of claim 1, wherein the first condition comprises: the signal quality of the target cell is greater than a first threshold value.
The method of claim 2, wherein the first threshold is a threshold for an a4 event.
The method of claim 2, wherein the first threshold value is a sum of a threshold value of an a4 event configured by the source network device and a first relative value, and the a4 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover.
The method of claim 4, wherein the first relative value is configured to the terminal device by Radio Resource Control (RRC) signaling.
The method of claim 1, wherein the first condition comprises: the difference between the signal quality of the target cell and the signal quality of the source cell is greater than a second threshold value.
The method of claim 6, wherein the second threshold is a threshold for an A3 event.
The method of claim 6, wherein the second threshold value is a sum of a threshold value and a second relative value of an A3 event configured by the source network device, and the A3 event configured by the source network device is an event triggering the terminal device to execute a conditional handover.
The method of claim 8, wherein the second relative value is configured to the terminal device through RRC signaling.
The method of claim 1, wherein the first condition comprises: the signal quality of the source cell is smaller than a third threshold value, and the signal quality of the target cell is larger than a fourth threshold value.
The method of claim 10, wherein the third threshold and the fourth threshold are thresholds for an a5 event.
The method of claim 10, wherein the third threshold value and the fourth threshold value are a sum of a threshold value and a third relative value of an a5 event configured by the source network device, and the a5 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover.
The method of claim 12, wherein the third relative value is configured to the terminal device through RRC signaling.
The method of claim 1, wherein the first condition comprises: the signal quality of the source cell is less than a fifth threshold value.
The method of claim 14, wherein the fifth threshold is a threshold for an a2 event.
The method of claim 14, wherein the fifth threshold is a sum of a threshold and a fourth relative value of an a2 event configured by the source network device, and the a2 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover.
The method of claim 16, wherein the fourth relative value is configured to the terminal device through RRC signaling.
The method of any of claims 2 to 16, wherein the first condition further comprises: the signal quality of the source cell is greater than a sixth threshold.
The method of any of claims 2 to 18, wherein the signal quality comprises at least one of:

reference channel received power, RSRP, reference signal received quality, RSRQ, and signal-to-noise ratio, SNR.
The method of any one of claims 1 to 19, wherein the method further comprises:

and the terminal equipment sends the first indication information to the source network equipment.
The method according to any of claims 1 to 20, wherein when the signal quality of the source cell is less than a sixth threshold value, the method further comprises:

the terminal equipment sends the signal quality of at least one target network equipment to the source network equipment; the signal quality of the at least one target network device is used for the source network device to determine a target network device for forwarding data from the at least one target network device.
The method according to any one of claims 1 to 21, wherein the first indication information comprises number information of the target cell.
The method according to any one of claims 1 to 22, wherein the first indication information includes a frequency point and a Physical Cell Identity (PCI) of the target cell.
The method of claim 22 or 23, wherein the first indication information further comprises: a signal quality of the target cell, and/or a signal quality of the source cell.
The method according to any one of claims 1 to 24, wherein the first indication information is carried in any one of the following signaling:

RRC signaling, medium access control, MAC, signaling, and physical layer signaling.
A method of data forwarding, the method comprising:

a source network device sends first information to a terminal device, wherein the first information is used for indicating the terminal device to send first indication information to the source network device when a first condition is met, and the first indication information is used for indicating the source network device to forward data to a target network device;

the first condition is related to a parameter of a source cell and/or a target cell of a conditional handover triggered based on the condition, the target cell corresponds to the target network device, and the source cell corresponds to the source network device.
The method of claim 26, wherein the first condition comprises: the signal quality of the target cell is greater than a first threshold value.
The method of claim 27, wherein the first threshold is a threshold for an a4 event.
The method of claim 27, wherein the first threshold is a sum of a threshold and a first relative value of an a4 event configured by the source network device, and the a4 event configured by the source network device is an event that triggers the terminal device to perform a conditional handover.
The method of claim 29, wherein the first relative value is configured to the terminal device by radio resource control, RRC, signaling.
The method of claim 26, wherein the first condition comprises: the difference between the signal quality of the target cell and the signal quality of the source cell is greater than a second threshold value.
The method of claim 31, wherein the second threshold is a threshold for an a3 event.
The method of claim 31, wherein the second threshold value is a sum of a threshold value and a second relative value of an A3 event configured by the source network device, and the A3 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover.
The method of claim 33, wherein the second relative value is configured to the terminal device through RRC signaling.
The method of claim 26, wherein the first condition comprises: the signal quality of the source cell is smaller than a third threshold value, and the signal quality of the target cell is larger than a fourth threshold value.
The method of claim 35, wherein the third threshold and the fourth threshold are thresholds for an a5 event.
The method of claim 35, wherein the third threshold value and the fourth threshold value are a sum of a threshold value and a third relative value of an a5 event configured by the source network device, and the a5 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover.
The method of claim 37, wherein the third relative value is configured to the terminal device through RRC signaling.
The method of claim 26, wherein the first condition comprises: the signal quality of the source cell is less than a fifth threshold value.
The method of claim 39, wherein the fifth threshold is a threshold for an A2 event.
The method of claim 39, wherein the fifth threshold is a sum of a threshold and a fourth relative value of the A2 event configured by the source network device, and the A2 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover.
The method of claim 41, wherein the fourth relative value is configured to the terminal device through RRC signaling.
The method of any of claims 27 to 42, wherein the first condition further comprises: the signal quality of the source cell is greater than a sixth threshold.
The method of any of claims 27 to 43, wherein the signal quality comprises at least one of:

reference channel received power, RSRP, reference signal received quality, RSRQ, and signal-to-noise ratio, SNR.
The method of any one of claims 26 to 44, wherein the method further comprises:

and the source network equipment receives the first indication information sent by the terminal equipment.
The method according to any of claims 26 to 45, wherein when the signal quality of the source cell is less than a sixth threshold value, the method further comprises:

and the source network equipment receives the signal quality of at least one target network equipment sent by the terminal equipment.
The method of claim 46, wherein the method further comprises:

and the source network equipment forwards data to the target network equipment with the best signal quality in the at least one target network equipment.
The method of any one of claims 26 to 47, wherein the first indication information comprises number information of the target cell.
The method according to any one of claims 26 to 48, wherein the first indication information comprises a frequency point and a Physical Cell Identity (PCI) of the target cell.
The method of claim 47 or 48, wherein the first indication information further comprises: a signal quality of the target cell, and/or a signal quality of the source cell.
The method according to any one of claims 26 to 50, wherein the first indication information is carried in any one of the following signaling:

RRC signaling, medium access control, MAC, signaling, and physical layer signaling.
A terminal device, the terminal device comprising:

a first receiving unit, configured to receive first information, where the first information is used to instruct the terminal device to send first instruction information to a source network device when a first condition is met, and the first instruction information is used to instruct the source network device to forward data to a target network device;

the first condition is related to a parameter of a source cell and/or a target cell of a conditional handover triggered based on the condition, the target cell corresponds to the target network device, and the source cell corresponds to the source network device.
The terminal device of claim 52, wherein the first condition comprises: the signal quality of the target cell is greater than a first threshold value.
The terminal device of claim 53, wherein the first threshold is a threshold for an A4 event.
The terminal device of claim 53, wherein the first threshold is a sum of a first relative value and a threshold of an A4 event configured by the source network device, and the A4 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover.
The terminal device of claim 55, wherein the first relative value is configured to the terminal device by Radio Resource Control (RRC) signaling.
The terminal device of claim 52, wherein the first condition comprises: the difference between the signal quality of the target cell and the signal quality of the source cell is greater than a second threshold value.
The terminal device of claim 57, wherein the second threshold is a threshold for an A3 event.
The terminal device of claim 57, wherein the second threshold value is a sum of a threshold value and a second relative value of the A3 event configured by the source network device, and the A3 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover.
The terminal device of claim 59, wherein the second relative value is configured to the terminal device by RRC signaling.
The terminal device of claim 52, wherein the first condition comprises: the signal quality of the source cell is smaller than a third threshold value, and the signal quality of the target cell is larger than a fourth threshold value.
The terminal device of claim 61, wherein the third and fourth threshold values are threshold values for an A5 event.
The terminal device of claim 61, wherein the third threshold value and the fourth threshold value are a sum of a threshold value and a third relative value of an A5 event configured by the source network device, and the A5 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover.
The terminal device of claim 63, wherein the third relative value is configured to the terminal device through RRC signaling.
The terminal device of claim 52, wherein the first condition comprises: the signal quality of the source cell is less than a fifth threshold value.
The terminal device of claim 65, wherein the fifth threshold is a threshold for an A2 event.
The terminal device of claim 65, wherein the fifth threshold is a sum of a threshold and a fourth relative value of an A2 event configured by the source network device, and the A2 event configured by the source network device is an event that triggers the terminal device to execute a conditional handover.
The terminal device of claim 67, wherein the fourth relative value is configured to the terminal device via RRC signaling.
The terminal device of any one of claims 53 to 68, wherein the first condition further comprises: the signal quality of the source cell is greater than a sixth threshold.
The terminal device of any one of claims 53 to 69, wherein the signal quality comprises at least one of:

reference channel received power, RSRP, reference signal received quality, RSRQ, and signal-to-noise ratio, SNR.
The terminal device of any one of claims 52 to 70, wherein the terminal device further comprises:

a first sending unit, further configured to send the first indication information to the source network device.
The terminal device of any one of claims 52 to 71, wherein the terminal device further comprises:

a second sending unit, configured to send, to the source network device, the signal quality of at least one target network device when the signal quality of the source cell is smaller than a sixth threshold value; the signal quality of the at least one target network device is used for the source network device to determine a target network device for forwarding data from the at least one target network device.
The terminal device of any one of claims 52 to 72, wherein the first indication information comprises number information of the target cell.
The terminal device according to any one of claims 52 to 73, wherein the first indication information includes a frequency point and a Physical Cell Identity (PCI) of the target cell.
The terminal device of claim 73 or 74, wherein the first indication information further comprises: a signal quality of the target cell, and/or a signal quality of the source cell.
The terminal device according to any of claims 52 to 75, wherein the first indication information is carried in any one of the following signaling:

RRC signaling, medium access control, MAC, signaling, and physical layer signaling.
A source network device, the source network device comprising:

a third sending unit, configured to send first information to a terminal device, where the first information is used to indicate that the terminal device sends first indication information to the source network device when a first condition is met, and the first indication information is used to indicate that the source network device forwards data to a target network device;

the first condition is related to a parameter of a source cell and/or a target cell of a conditional handover triggered based on the condition, the target cell corresponds to the target network device, and the source cell corresponds to the source network device.
The source network device of claim 77, wherein the first condition comprises: the signal quality of the target cell is greater than a first threshold value.
The source network device of claim 78, wherein the first threshold is a threshold for an A4 event.
The source network device of claim 78, wherein the first threshold is a sum of a first relative value and a threshold of an A4 event configured by the source network device, and the A4 event configured by the source network device is an event that triggers the terminal device to perform a conditional handover.
The source network device of claim 80, wherein the first relative value is configured to the terminal device by radio resource control, RRC, signaling.
The source network device of claim 77, wherein the first condition comprises: the difference between the signal quality of the target cell and the signal quality of the source cell is greater than a second threshold value.
The source network device of claim 82, wherein the second threshold is a threshold for an A3 event.
The source network device of claim 82, wherein the second threshold is a sum of a threshold and a second relative value of an A3 event configured by the source network device, and the A3 event configured by the source network device is an event that triggers the terminal device to perform a conditional handover.
The source network device of claim 84, wherein the second relative value is configured to the terminal device via RRC signaling.
The source network device of claim 77, wherein the first condition comprises: the signal quality of the source cell is smaller than a third threshold value, and the signal quality of the target cell is larger than a fourth threshold value.
The source network device of claim 86, wherein the third threshold value and the fourth threshold value are threshold values for an A5 event.
The source network device of claim 86, wherein the third threshold value and the fourth threshold value are sums of a threshold value and a third relative value of an A5 event configured by the source network device, and the A5 event configured by the source network device is an event that triggers the terminal device to perform a conditional handover.
The source network device of claim 88, wherein the third relative value is configured to the terminal device via RRC signaling.
The source network device of claim 77, wherein the first condition comprises: the signal quality of the source cell is less than a fifth threshold value.
The source network device of claim 90, wherein the fifth threshold is a threshold for an A2 event.
The source network device of claim 90, wherein the fifth threshold is a sum of a threshold and a fourth relative value of an a2 event configured by the source network device, and the a2 event configured by the source network device is an event that triggers the terminal device to perform a conditional handover.
The source network device of claim 92, wherein the fourth relative value is configured to the terminal device via RRC signaling.
The source network device of any of claims 78-93, wherein the first condition further includes: the signal quality of the source cell is greater than a sixth threshold.
The source network device of any of claims 78-94, wherein the signal quality includes at least one of:

reference channel received power, RSRP, reference signal received quality, RSRQ, and signal-to-noise ratio, SNR.
The source network device of any one of claims 77 to 95, wherein the source network device further comprises a second receiving unit, further configured to receive the first indication information sent by the terminal device.
The source network device of any of claims 77-96, wherein the source network device further comprises:

a third receiving unit, configured to receive, when the signal quality of the source cell is smaller than a sixth threshold, the signal quality of at least one target network device sent by the terminal device.
The source network device of claim 97, wherein the third sending unit is further configured to forward data to a target network device with the best signal quality among the at least one target network device.
The source network device of any of claims 77-98, wherein the first indication information includes numbering information of the target cell.
The source network device of any one of claims 77 to 99, wherein the first indication information includes a frequency point and a physical cell identity, PCI, of the target cell.
The source network device of claim 99 or 100, wherein the first indication information further comprises: a signal quality of the target cell, and/or a signal quality of the source cell.
The source network device of any one of claims 77 to 101, wherein the first indication information is carried in any one of the following signaling:

RRC signaling, medium access control, MAC, signaling, and physical layer signaling.
A terminal device comprising a processor and a memory for storing a computer program capable of running on the processor, wherein,

the processor is configured to perform the steps of the data forwarding method according to any one of claims 1 to 25 when running the computer program.
A network device comprising a processor and a memory for storing a computer program capable of running on the processor, wherein,

the processor is configured to perform the steps of the data forwarding method according to any one of claims 26 to 51 when running the computer program.
A storage medium storing an executable program which, when executed by a processor, implements the data forwarding method of any one of claims 1 to 25.
A storage medium storing an executable program which, when executed by a processor, implements the data forwarding method of any one of claims 26 to 51.