CN117279048A - Cell switching method and device and computer readable storage medium - Google Patents

Abstract

A cell switching method and device, and a computer readable storage medium, the cell switching method comprising: obtaining prediction information; and in the condition switching process, selecting a condition switching enhancement parameter corresponding to the prediction information to perform condition switching. By adopting the scheme, unreasonable switching possibly occurring in the condition switching process can be effectively avoided, and the condition switching efficiency is improved.

Description

Cell switching method and device and computer readable storage medium

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a cell handover method and apparatus, and a computer readable storage medium.

Background

In existing 4G/5G communication systems, conditional switching (Conditional Handover) is introduced. And when one or more execution conditions are met, the terminal equipment automatically executes switching. After receiving the condition switching configuration, the terminal device starts to evaluate the execution condition and determines whether to execute the condition switching.

In the prior art, in the process of performing conditional switching, unreasonable switching may occur.

Disclosure of Invention

The embodiment of the invention solves the technical problem that unreasonable switching possibly occurs in the condition switching process.

In order to solve the above technical problems, an embodiment of the present invention provides a cell switching method, applied to a terminal device, where the cell switching method includes: obtaining prediction information; and in the condition switching process, selecting a condition switching enhancement parameter corresponding to the prediction information to perform condition switching.

Optionally, the prediction information includes: the future motion trail is used for representing the motion trail of the terminal equipment in a future period of time; and/or future traffic patterns for characterizing traffic patterns of the terminal device in a future period of time.

Optionally, the conditional handover enhancement parameter includes at least one of: enhanced bias of events; applying the application condition corresponding to the enhancement bias; the event is one or more events in the execution condition of the conditional switch.

Optionally, if the prediction information includes the future motion trail and a future service mode, and both the future motion trail and the future service mode meet the application condition, selecting a condition switching enhancement parameter corresponding to the future motion trail; or selecting the condition switching enhancement parameters corresponding to the future service modes.

Optionally, the conditional switching enhancement parameter further includes: priority indication information; the priority indication information is used for indicating: when the future motion trail and the future service mode both meet the application conditions, preferentially using the condition switching enhancement parameters corresponding to the future motion trail; or, preferentially using the conditional switching enhancement parameters corresponding to the future service modes.

Optionally, the application condition includes at least one of: probability of the future motion trail passing through the candidate cell; probability of executing the future traffic pattern.

Optionally, the application condition further includes: duration of stay in the candidate cell.

Optionally, the cell switching method further includes: and acquiring the condition switching enhancement parameters.

Optionally, the acquiring the conditional switching enhancement parameter includes: and receiving a high-layer signaling, wherein the high-layer signaling carries the conditional switching enhancement parameters.

Optionally, the higher layer signaling includes RRC signaling; the RRC signaling includes: RRC dedicated signaling or RRC common signaling.

Optionally, the RRC dedicated signaling includes: an RRC release message; or, an RRC reconfiguration message.

Optionally, before the acquiring the conditional handover enhancement parameter, the method further includes: and sending a request message, wherein the request message is used for indicating a request to issue the conditional switching enhancement parameters.

Optionally, the sending the request message includes: the request message is carried in either msg1 or msg3 of the random access procedure.

Optionally, before the acquiring the conditional handover enhancement parameter, the method further includes: reporting capability information supporting conditional switching enhancement.

Optionally, after completing the conditional switch, the method further includes: reporting the enhancement bias use information; the enhancement bias use information is used to indicate whether enhancement bias is applied.

Optionally, the enhancement bias usage information is further used to indicate a reason for using the enhancement bias; the reason for using the enhancement bias is that the enhancement bias is adopted based on the motion trail of the terminal equipment; or, an enhancement bias is adopted based on the service mode of the terminal equipment.

Optionally, the reporting the enhanced bias usage information includes: and reporting the enhancement bias use information by adopting an RRC message.

The embodiment of the invention also provides a cell switching device, which comprises: an acquisition unit configured to acquire prediction information; and the switching unit is used for selecting the condition switching enhancement parameters corresponding to the prediction information to perform condition switching in the condition switching process.

The embodiment of the invention also provides a computer readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, and a computer program is stored on the computer readable storage medium, and the computer program is executed by a processor to execute the steps of any cell switching method.

The embodiment of the invention also provides another cell switching device, which comprises a memory and a processor, wherein the memory stores a computer program which can be run on the processor, and the processor executes the steps of any cell switching method when running the computer program.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

and the terminal equipment selects corresponding condition switching enhancement parameters according to the prediction information and executes the condition switching operation. The prediction information includes future motion trajectories and/or future traffic patterns. Therefore, the terminal equipment can pertinently enhance the condition switching, thereby effectively avoiding unreasonable condition switching.

Further, the terminal equipment adopts cell-level enhancement bias in the condition switching process according to the future motion trail, so that personalized condition switching is realized, the condition switching efficiency is improved, and the mobility performance of the terminal equipment is improved.

Furthermore, the terminal equipment adopts enhanced bias in the condition switching process according to the future service mode, so that personalized condition switching is realized, the mobility performance of the terminal equipment is ensured, and the performance of the future initiated service can be improved.

In addition, by reporting the enhanced bias use information, the access network device can adjust the condition switching enhancement parameters, and network performance and terminal device condition switching performance are improved.

Drawings

Fig. 1 is a flow chart of a cell handover method in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a network architecture in an embodiment of the invention;

fig. 3 is a schematic structural diagram of a cell switching apparatus according to an embodiment of the present invention.

Detailed Description

In the prior art, when executing the condition switching, the terminal device can execute the condition switching as long as the condition is detected to be satisfied. However, existing conditional handoffs may have unreasonable handoffs. For example, it is detected that a candidate cell1 satisfies the conditional handover, and according to the existing scheme, the terminal device is handed over to cell1. However, the terminal device is in motion, and the motion trend of the terminal device is far away from the cell1. Therefore, after the terminal device switches to the cell1, the signal quality of the cell1 is degraded after a short time, and the terminal device needs to re-perform the conditional switching, which results in the occurrence of unreasonable switching.

In the embodiment of the invention, the terminal equipment selects the corresponding condition switching enhancement parameters according to the prediction information and executes the condition switching operation. The prediction information includes future motion trajectories and/or future traffic patterns. Therefore, the terminal equipment can pertinently enhance the condition switching, thereby effectively avoiding unreasonable condition switching.

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

The embodiment of the invention provides a cell switching method, and the detailed description is given below through specific steps with reference to fig. 1.

First, partial terms related to the embodiments of the present application are explained for easy understanding by those skilled in the art.

1. And a terminal device. The terminal device according to the embodiment of the present invention is a device having a wireless communication function, and may be referred to as a terminal (terminal), a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), an access terminal device, a vehicle-mounted terminal device, an industrial control terminal device, a UE unit, a UE station, a mobile station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent, or a UE apparatus. The terminal device may be fixed or mobile. It should be noted that the terminal device may support at least one wireless communication technology, such as LTE, new radio, NR, etc. For example, the terminal device may be a mobile phone, a tablet, a desktop, a notebook, a kiosk, a car-mounted terminal, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in an industrial control (industrial control), a wireless terminal in a self-driving (self-driving), a wireless terminal in a teleoperation (remote medical surgery), a wireless terminal in a smart grid, a wireless terminal in a transportation security (transportation safety), a wireless terminal in a smart city, a wireless terminal in a 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 capabilities, a computing device or other processing device connected to a wireless modem, a wearable device, a terminal in a future mobile communication network, or a public land mobile network (public land mobile network) in a future mobile communication network, etc. In some embodiments of the present application, the terminal device may also be a device with a transceiver function, such as a chip system. The chip system may include a chip and may also include other discrete devices.

2. An access network device. The access network device in the embodiment of the present invention is a device that provides a wireless communication function for a terminal device, and may also be referred to as a radio access network (radio access network, RAN) device, or an access network element, etc. Wherein the access network device may support at least one wireless communication technology, e.g., LTE, NR, etc. By way of example, access network devices include, but are not limited to: next generation base stations (gnbs), evolved node bs (enbs), radio network controllers (radio network controller, RNCs), node bs (node bs, NB), base station controllers (base station controller, BSC), base transceiver stations (base transceiver station, BTS), home base stations (e.g., home evolved node B, or home node B, HNB), baseband units (BBUs), transceiving points (transmitting and receiving point, TRPs), transmitting points (transmitting point, TP), mobile switching centers, and the like in a fifth generation mobile communication system (5 th-generation, 5G). The network device may also be a wireless controller, a Centralized Unit (CU), and/or a Distributed Unit (DU) in the cloud wireless access network (cloud radio access network, CRAN) scenario, or the access network device may be a relay station, an access point, a vehicle-mounted device, a terminal device, a wearable device, and an access network device in future mobile communications or an access network device in a future evolved PLMN, etc. In some embodiments, the access network device may also be a device, such as a system-on-a-chip, having the functionality to provide wireless communication for the terminal device. By way of example, the chip system may include a chip, and may also include other discrete devices.

In some embodiments, the access network device may also communicate with an internet protocol (Internet Protocol, IP) network, such as the internet, a private IP network, or other data network, among others.

3. A core network. The core network of the embodiment of the invention is composed of core network elements. The core network element may be referred to as a core network device, and is a network element deployed in a core network, for example, a core network control plane network element or a core network user plane network element. The Core Network of the embodiment of the invention can be an evolution type packet Core Network (Evolved Packet Core, EPC) or a 5G Core Network (5G Core Network), and can also be a novel Core Network in a future communication system. For example, the 5G core network is composed of a set of network elements, and implements access and mobility management functions (Access and Mobility Management Function, AMF) for functions such as mobility management, user plane functions (User Plane Function, UPF) for functions such as packet routing forwarding and QoS (Quality of Service) management, session management functions (Session Management Function, SMF) for functions such as session management, IP address allocation and management, and the like. The EPC may be composed of a mobility management entity (Mobility Management Entity, MME) providing functions of mobility management, gateway selection, etc., a Serving Gateway (S-GW) providing functions of packet forwarding, etc., and a PDN Gateway (P-GW) providing functions of terminal address allocation, rate control, etc. For multicast broadcast service (Multicast Broadcast Service, MBS), the core network may include several new network elements to implement functions such as forwarding of data packets, MBS session management, qoS management, transmission mode switching (switching between unicast and multicast/broadcast transmission modes), and so on. Alternatively, the functions may be implemented by an existing core network element.

4. And (5) uplink communication. In the embodiment of the present invention, uplink communication may be referred to as uplink transmission, which refers to unidirectional communication from a terminal device to an access network device, where a communication link used for uplink communication is an uplink. The data transmitted on the uplink is uplink data. The transmission direction of the uplink data is the uplink direction.

5. And (5) downlink communication. In the embodiment of the invention, the downlink communication may be referred to as downlink transmission, which refers to unidirectional communication from the access network device to the terminal device, where the communication link used for the downlink communication is an uplink. The data transmitted on the downlink is downlink data. The transmission direction of the downlink data is the downlink direction.

The cell switching method provided by the embodiment of the invention can be applied to the network structure shown in fig. 2. As shown in fig. 2, a schematic diagram of a network structure in an embodiment of the present invention is given.

The interface between the terminal device and the access network device is an air interface, and one terminal device may be connected to one or more access network devices. An access network device may connect to and manage a plurality of terminal devices.

Different access network devices have interfaces to communicate, and interfaces between different access network devices may be an X2 interface (applied to a 4G communication system), an Xn interface (applied to a 5G communication system), and the like.

The communication between the access network device and the core network device may be performed through an S1 interface (applied to a 4G communication system) or through an NG interface (applied to a 5G communication system).

It will be appreciated that as communication technology advances, the interfaces between different access network devices, and between the access network device and the core network device may also be other types of interfaces.

In a specific implementation, the terminal device may also access the access network device through the relay device. The terminal equipment and the relay equipment can be accessed to the access network equipment through a PC5 link or through a WIFI interface and the like.

The following describes the cell handover method provided in the embodiment of the present invention in detail.

In a specific implementation, the cell handover methods corresponding to the following steps S101 to S102 may be executed by a chip (such as a baseband chip) having a data processing function in the terminal device, or may be executed by a chip module of the chip including the data processing function in the terminal device.

And step 101, obtaining prediction information.

In the embodiment of the invention, the prediction information can comprise a future motion track, a future service mode and both the future motion track and the future service mode.

In implementations, the future motion profile may be used to characterize an area/route that the terminal device will traverse over a future period of time. The area passed in a future period of time may refer to an area in the sense of mobile communication, such as a cell (cell) or tracking area (tracking area), etc. The route passed in a future period of time may refer to a route in a geographical sense, such as a route characterized by longitude and latitude information.

In particular implementations, the future traffic pattern may characterize a traffic pattern that the terminal device may perform over a future period of time. Future modes of service may be, short message service, telephone service, normal video, real-time gaming, XR, industrial control commands, V2X, etc.

Step 102, in the condition switching process, selecting a condition switching enhancement parameter corresponding to the prediction information to perform condition switching.

In the embodiment of the present invention, before executing step S102, the terminal device may learn the conditional switching enhancement parameter in advance. The access network device can switch the enhancement parameters through the high-layer signaling bearing condition and send the high-layer signaling. The terminal device may receive the higher layer signaling and obtain the conditional handoff enhancement parameters therefrom.

In an implementation, the higher layer signaling may be RRC signaling. The RRC signaling may include RRC dedicated signaling or RRC common signaling. The RRC dedicated signaling may be an RRC release (RRC release) message or an RRC reconfiguration (RRC Reconfiguration) message. The RRC common signaling may be a system message (system information).

In the embodiment of the present invention, the RRC reconfiguration message may be RRC reconfiguration message 1. The RRC reconfiguration message may include candidate cells for the conditional handover and execution conditions for the conditional handover. The number of the candidate cells for the conditional handover in the RRC reconfiguration message may be plural, and the execution conditions of the conditional handover corresponding to different candidate cells may be different. The conditional handover enhancement parameters may be included in an RRC reconfiguration message.

In a specific implementation, the terminal device may send a request message to the access network device, where the request message is used to indicate that the access network device is requested to unwind the component switching enhancement parameters. The access network device may unwind the spring switch enhancement parameters after receiving the request message.

The terminal device may request the access network device to unwind the spring switch enhancement parameters when initiating the random access procedure. The terminal device may carry the request message in msg1 or msg3 in the random access procedure. The access network device may carry the conditional access enhancement parameters in a system message and send them after receiving the request message.

In the embodiment of the invention, before sending the request message to the access network equipment, the terminal equipment can also report the capability information supporting conditional switching enhancement to the access network equipment. The capability information of the conditional switching enhancement may refer to the capability of the terminal device for motion trail prediction and/or the capability for predicting the service mode, and the capability of enhancing the conditional switching according to the predicted motion trail/service model. After receiving the capability information reported by the terminal equipment, the access network equipment can send the conditional switching enhancement parameters through RRC dedicated signaling.

In a specific implementation, when detecting that the conditional switching is performed, the terminal device may select, according to the prediction information, a conditional switching enhancement parameter corresponding to the prediction information, and perform the conditional switching.

In the embodiment of the invention, the conditional switching enhancement parameters can comprise an enhancement bias of an event, and the enhancement bias of the event can be one or more. The enhancement bias of an event may refer to an enhancement bias value employed in determining whether the event is satisfied.

In a specific implementation, the event is one or more events in the execution condition of the conditional switch. The execution conditions for the conditional switch may include any one or more of the following:

event 1: the signal quality of the candidate cell is higher than the signal quality of the serving cell by an offset value;

event 2: the signal quality of the serving cell is lower than a threshold value 1 and the signal quality of the candidate cell is higher than a threshold value 2;

event 3: the signal quality of the candidate cell is higher than a threshold value 3;

event 4: the distance between the terminal equipment and the reference position point of the serving cell is greater than a distance threshold Thresh1 and less than a distance threshold Thresh2;

event 5: the time measured by the terminal equipment is greater than a time threshold Thresh1 and less than a time threshold Thresh2.

That is, the above-mentioned event is any one or more of event 1, event 2, event 3, event 4, and event 5.

In the embodiment of the invention, the enhanced bias of the event can refer to an enhanced bias value adopted when judging whether the event is satisfied.

For example, corresponding to event 1, the signal quality of the candidate cell is higher than the signal quality of the serving cell by an offset value, i.e., the signal quality of the candidate cell is greater than the sum of the signal quality of the serving cell and the offset value. The conditional handoff enhancement parameters include the enhancement bias corresponding to event 1, then the decision criteria for event 1 are: the signal quality of the candidate cell is larger than the sum of the signal quality of the serving cell, the bias value and the enhancement bias value.

In a specific implementation, the enhancement bias values corresponding to different events may be the same or different. Or the enhancement bias values corresponding to part of the events are the same, and the enhancement bias values corresponding to part of the events are different.

In the embodiment of the invention, the condition switching enhancement parameters may further include application conditions corresponding to the enhancement bias of the event, and the number of the application conditions may be one or more. The condition switching enhancement parameter may also include both an event enhancement bias and an application condition corresponding to the event enhancement bias.

In particular implementations, the application conditions described above may refer to conditions that use enhanced bias values.

In particular, the application condition may be related to the future motion profile only, and the corresponding enhancement bias value is used only when the future motion profile meets the application condition. At this time, the application conditions may include: the future motion trajectory passes through a first probability of a candidate cell that supports conditional handover. Future motion trajectories meeting the application conditions may refer to: the probability of future motion trajectories passing through the candidate cell is greater than the first probability described above. Or the application conditions include: the terminal device predicts that the duration of stay in the candidate cell meets a certain threshold.

The application conditions may also be related to future traffic patterns only, with corresponding enhancement bias values being used only when the future traffic patterns meet the application conditions. At this time, the application conditions may include: the future traffic pattern is a second probability of a certain target traffic pattern. Future traffic patterns meeting the application conditions may refer to: the probability that the future traffic pattern is a certain target traffic pattern is greater than the second probability.

In a specific implementation, the terminal device may predict the future motion trajectory and the future traffic pattern simultaneously. If only the future motion trail meets the application condition, an enhanced bias value corresponding to the future motion trail can be adopted. If only the future service mode meets the application condition, the enhancement bias value corresponding to the future service mode can be adopted.

If the future motion trail and the future service mode both meet the application conditions, the terminal device can select a corresponding enhancement bias value according to a preset rule.

Specifically, if the preset rule is to preferentially use the enhancement bias value corresponding to the future motion track, when the future motion track and the future service mode both meet the application conditions, the enhancement bias value corresponding to the future motion track is used. If the preset rule is to preferentially use the enhancement bias value corresponding to the future service mode, when the future motion track and the future service mode meet the application conditions, the enhancement bias value corresponding to the future service mode is used.

In a specific implementation, the access network device may also issue priority indication information to the terminal device, where the priority indication information may be used to indicate: when the future motion trail and the future service mode both meet the application conditions, preferentially using the enhancement bias value corresponding to the future motion trail; or, the enhancement bias value corresponding to the future service mode is preferentially used. The priority indication information may be included in the conditional handoff enhancement parameter.

The corresponding conditional switching enhancement parameters may be the same or different for different application conditions. For example, the motion trajectory corresponds to an application condition, which corresponds to the condition switching enhancement parameter 1; and executing the application condition corresponding to the service mode 1, and switching the enhancement parameter 2 corresponding to the condition.

The following describes a procedure of conditional switching of the terminal device according to a future motion trajectory.

In implementations, there may be one or more candidate cells for conditional handover on future motion trajectories. The terminal device may employ corresponding enhanced bias values according to the candidate cells for handover under one or more conditions described above. If the number of candidate cells for conditional handover is plural, the corresponding enhanced configuration values may be applied to the candidate cells for conditional handover.

For example, there is a candidate cell2 on the future motion trajectory, and the candidate cell2 is a candidate cell for conditional handover. Event 1 of Cell2 corresponds to enhancement bias value 1, event 2 corresponds to enhancement bias value 2, and event 3 corresponds to enhancement bias value 1. The access network equipment is configured with event 3, and the judgment criterion of event 3 is as follows: the signal quality of the candidate cell is higher than the sum of a threshold value 3 and an enhancement bias value 1, and the threshold value 3 is a threshold value corresponding to the event 3. And if the terminal equipment judges that the event 3 is satisfied, determining the candidate cell2 as a target cell, and executing cell switching by the terminal equipment to switch to the candidate cell2.

If the access network equipment is also configured with application conditions in the condition switching enhancement parameters, the application conditions comprise the duration of stay in the candidate cell predicted by the terminal equipment. The terminal device determines that the application condition is met before using the enhancement bias value 1.

In one embodiment of the present invention, the application conditions include: the terminal device predicts the duration of stay in the candidate cell. The terminal device predicts that the duration of stay in the candidate cell exceeds the preset duration, and uses the enhanced bias value.

For example, the access network device is configured with an application condition 1, where the application condition 1 is: the terminal equipment predicts that the stay time in the cell2 is longer than the preset time T1. The terminal equipment predicts that the stay time in the cell2 is longer than T1, and the access network equipment is configured with an event 3, and the judgment criterion of the event 3 is as follows: the signal quality of the candidate cell is higher than the sum of the threshold value 3 and the enhancement bias value 1.

As another example, the access network device is configured with an application condition 1, where the application condition 1 is: the terminal equipment predicts that the stay time in the cell2 is smaller than the preset time T2. The terminal equipment predicts that the stay time in the cell2 is not more than T2, and the access network equipment is configured with the event 3, and the judgment criterion of the event 3 is as follows: the signal quality of the candidate cell is higher than the sum of the threshold value 3 and the enhancement bias value 1.

In yet another embodiment of the present invention, the application conditions include: the terminal equipment predicts the size relation between the stay time in the candidate cell and the first time length and the second time length, wherein the second time length is longer than the first time length. When the terminal equipment predicts that the stay time in the candidate cell is less than the first time, the terminal equipment uses a first enhancement bias value; when the terminal equipment predicts that the stay time length in the candidate cell is between the first time length and the second time length, the terminal equipment uses a second enhancement bias value; the terminal device uses a third enhanced bias value when the terminal device predicts that the time period of stay in the candidate cell is longer than the second time period.

For example, if the terminal device predicts that the duration of stay in cell2 is less than the first duration T3, the terminal device uses the enhancement bias value 1; the terminal equipment predicts that the stay time in the cell2 is between a first time T3 and a second time T4, and then uses an enhancement bias value 2; and if the terminal equipment predicts that the stay time in the cell2 is longer than the second time T4, the terminal equipment uses the enhancement bias value 3.

In a specific implementation, if the application condition includes a first probability that the future motion trajectory passes through the candidate cell, the terminal device predicts that the probability of staying in the candidate cell is greater than the first probability, and uses the corresponding enhancement bias value.

For example, the application condition 1 is the probability P1 of staying in the cell2. The terminal device predicts that the probability of staying in the cell2 is larger than P1, and uses the enhancement bias value 1.

The following describes a procedure for conditional handover of a terminal device according to a future traffic pattern.

In a specific implementation, the terminal device may predict its own traffic pattern. And selecting a cell supporting the service mode from candidate cells for conditional switching by the terminal equipment, and adopting a corresponding enhanced bias value. If there are multiple candidate cells supporting the service mode, the enhancement bias values applied to different candidate cells may be the same or different.

For example, if the candidate cell2 for conditional handover supports the service mode 1, the enhanced bias value 11 is adopted, and the enhanced bias value 11 is applied to the event 3 of the cell2. The access network equipment is configured with event 3, and the judgment criterion of event 3 is as follows: the signal quality of cell2 is higher than the sum of the threshold value 3 and the enhancement bias value 11. And the terminal equipment judges that the event 3 is met, namely the terminal equipment judges that the signal quality of the cell2 is higher than the sum of the threshold value 3 and the enhancement bias value 11, and the terminal equipment determines the cell2 as a target cell and performs switching to the cell2.

For another example, if the candidate cell3 for conditional handover supports the service mode 1, the enhancement bias value 12 is adopted, and the enhancement bias value 12 is applied to the event 1 of the cell3. The access network equipment is configured with event 1, and the judgment criterion of event 1 is as follows: the signal quality difference of cell3 and the signal quality of the serving cell is higher than the sum of the threshold value 1 and the enhancement bias value 12. And if the terminal equipment judges that the event 1 is met, namely the terminal equipment judges that the signal quality difference between the signal quality of the cell3 and the signal quality of the service cell is higher than the sum of the threshold value 1 and the enhancement bias value 12, the terminal equipment determines the cell3 as a target cell and performs switching to the cell3.

In the above example, the enhancement bias value 11 may be equal to or different from the enhancement bias value 12.

In a specific implementation, if the access network device is further configured with an application condition in the conditional handover enhancement parameter, the application condition includes a probability threshold for staying in the candidate cell of the conditional handover. If the probability of the terminal equipment predicting to stay in the candidate cell of the conditional handover is greater than or equal to the probability threshold, a corresponding enhancement bias value can be used.

For example, the application condition includes a probability threshold P1 of stay in the candidate cell of the conditional handover. The probability of the terminal equipment predicting to stay in the cell2 is not less than P1, and the corresponding enhancement bias value 11 is used.

In a specific implementation, after selecting the enhanced bias value, the terminal device may further report application information of the enhanced bias to the access network device.

Further, the above embodiments may be used for conditional addition or conditional modification of cells in SCG (Secondary Cell Group) in a dual link farm; the condition adding means that the access network equipment notifies a terminal of a condition adding event, the event is satisfied, and the terminal performs the condition adding operation of the cell; the condition adding means that the access network equipment notifies the terminal of a condition modification event, the event is satisfied, and the terminal performs the condition modification operation of the cell. The enhanced bias technical scheme is adopted in the condition adding or condition modifying event.

In an embodiment of the present invention, the application information of the enhancement bias may be used to indicate whether the enhancement bias value is applied. The application information of the enhancement bias may also be used to indicate a reason why the enhancement bias value is applied, which may be that the enhancement bias is adopted based on a future motion trajectory of the terminal device or that the enhancement bias is adopted based on a future traffic pattern of the terminal device.

When the terminal equipment reports the application information of the enhancement bias, the terminal equipment can report the application information of the enhancement bias through RRC information. The RRC message may include any of the following: UEInformationResponse, RRCSetupComplete, RRCResumeComplete, RRCReconfigurationComplete.

The access network device can correspondingly modify, configure, delete and the like the enhancement bias value by reporting the application information of the enhancement bias through the terminal device, thereby improving the network performance and the condition switching performance of the terminal device.

Referring to fig. 3, an embodiment of the present invention further provides a cell switching apparatus 30, including: an acquisition unit 301 and a switching unit 302, wherein:

an acquisition unit 301 for acquiring prediction information;

and a switching unit 302, configured to select a condition switching enhancement parameter corresponding to the prediction information to perform condition switching in a condition switching process.

In specific implementation, the specific execution process of the acquiring unit 301 and the switching unit 302 may refer to the steps S101 to S102 correspondingly, which is not described herein.

In a specific implementation, the cell switching device 30 may correspond to a chip (such as a baseband chip) having a data processing function in the terminal device, or may correspond to a chip module of the chip including the data processing function in the terminal device, or may correspond to the terminal device.

The embodiment of the invention also provides a computer readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, and a computer program is stored on the computer readable storage medium, and the computer program is executed by a processor to execute the steps of the cell handover method provided in any embodiment.

The embodiment of the invention also provides another cell switching device, which comprises a memory and a processor, wherein the memory stores a computer program which can be run on the processor, and the processor executes the steps of the cell switching method provided by any embodiment when running the computer program.

It should be noted that, for simplicity of description, the foregoing method embodiments are all expressed as a series of action combinations, but it should be understood by those skilled in the art that the present application is not limited by the order of actions described, as some steps may be performed in other order or simultaneously in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required in the present application.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

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 elements in the processor for execution. The software elements 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 executes instructions in the memory to perform the steps of the method described above in conjunction with its hardware. To avoid repetition, a detailed description is not provided herein.

In an embodiment of the present application, the processor of the above apparatus may be a central processing unit (Central Processing Unit, CPU), which may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The present application also provides a computer storage medium storing a computer program for electronic data exchange, the computer program causing a computer to execute some or all of the steps of any one of the methods described in the method embodiments above.

Embodiments of the present application also provide a computer program product comprising a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any one of the methods described in the method embodiments above. The computer program product may be a software installation package.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and the division of elements, such as those described above, is merely a logical function division, and may be implemented in other manners, such as multiple elements 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, or may be in electrical or other forms.

The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purposes of the embodiments of the present application.

In addition, each functional unit in each embodiment 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 integrated units may be implemented in hardware or in software functional units.

The integrated units described above, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution contributing to the prior art or in the form of a software product stored in a memory, comprising several instructions for causing a computer device (which may be a personal computer, a server or TRP, etc.) to perform all or part of the steps of the methods of the various embodiments of the present application. And the aforementioned memory includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing has outlined rather broadly the more detailed description of embodiments of the present application, wherein specific examples are provided herein to illustrate the principles and embodiments of the present application, the above examples being provided solely to assist in the understanding of the methods of the present application and the core ideas thereof; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.

Claims (20)

1. A cell switching method applied to a terminal device, comprising:

obtaining prediction information;

and in the condition switching process, selecting a condition switching enhancement parameter corresponding to the prediction information to perform condition switching.

2. The cell handover method of claim 1, wherein the prediction information comprises: the future motion trail is used for representing the motion trail of the terminal equipment in a future period of time; and/or future traffic patterns for characterizing traffic patterns of the terminal device in a future period of time.

3. The cell handover method of claim 2, wherein the conditional handover enhancement parameter comprises at least one of: enhanced bias of events; applying the application condition corresponding to the enhancement bias; the event is one or more events in the execution condition of the conditional switch.

4. The cell handover method according to claim 3, wherein if the prediction information includes the future motion trajectory and a future traffic pattern, and both the future motion trajectory and the future traffic pattern satisfy the application condition, selecting a conditional handover enhancement parameter corresponding to the future motion trajectory; or selecting the condition switching enhancement parameters corresponding to the future service modes.

5. The cell handover method of claim 4, wherein the conditional handover enhancement parameter further comprises: priority indication information; the priority indication information is used for indicating: when the future motion trail and the future service mode both meet the application conditions, preferentially using the condition switching enhancement parameters corresponding to the future motion trail; or, preferentially using the conditional switching enhancement parameters corresponding to the future service modes.

6. A cell handover method according to claim 3, wherein the application conditions include at least one of: probability of the future motion trail passing through the candidate cell; probability of executing the future traffic pattern.

7. The cell handover method according to claim 3 or 6, wherein the application conditions further include: duration of stay in the candidate cell.

8. The cell switching method of claim 1, further comprising: and acquiring the condition switching enhancement parameters.

9. The method of cell handover according to claim 8, wherein the obtaining the conditional handover enhancement parameter comprises:

and receiving a high-layer signaling, wherein the high-layer signaling carries the conditional switching enhancement parameters.

10. The cell handover method of claim 9, wherein the higher layer signaling comprises RRC signaling; the RRC signaling includes: RRC dedicated signaling or RRC common signaling.

11. The cell handover method of claim 10, wherein the RRC dedicated signaling comprises: an RRC release message; or, an RRC reconfiguration message.

12. The cell handover method of claim 8, further comprising, prior to acquiring the conditional handover enhancement parameter:

and sending a request message, wherein the request message is used for indicating a request to issue the conditional switching enhancement parameters.

13. The cell switching method of claim 12, wherein the transmitting the request message comprises:

the request message is carried in either msg1 or msg3 of the random access procedure.

14. The cell handover method of claim 1, further comprising, prior to acquiring the conditional handover enhancement parameter:

reporting capability information supporting conditional switching enhancement.

15. The cell switching method of claim 14, further comprising, after completing the conditional switch:

reporting the enhancement bias use information; the enhancement bias use information is used to indicate whether enhancement bias is applied.

16. The cell handover method of claim 15, wherein the enhanced bias usage information is further used to indicate a reason for using the enhanced bias; the reason for using the enhancement bias is that the enhancement bias is adopted based on the motion trail of the terminal equipment; or, an enhancement bias is adopted based on the service mode of the terminal equipment.

17. The cell handover method according to claim 15 or 16, wherein the reporting the enhanced bias usage information includes:

and reporting the enhancement bias use information by adopting an RRC message.

18. A cell switching apparatus, comprising:

an acquisition unit configured to acquire prediction information;

and the switching unit is used for selecting the condition switching enhancement parameters corresponding to the prediction information to perform condition switching in the condition switching process.

19. A computer readable storage medium, being a non-volatile storage medium or a non-transitory storage medium, having stored thereon a computer program, characterized in that the computer program when executed by a processor performs the steps of the cell handover method according to any of claims 1 to 17.

20. A cell handover apparatus comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, wherein the processor, when executing the computer program, performs the steps of the cell handover method according to any of claims 1 to 17.