CN112806061A

CN112806061A - Switching processing method, user equipment and network equipment

Info

Publication number: CN112806061A
Application number: CN201980064887.1A
Authority: CN
Inventors: 石聪; 杨宁; 尤心
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2021-05-14
Anticipated expiration: 2039-03-29
Also published as: WO2020199026A9; WO2020199026A1; CN112806061B

Abstract

The invention discloses a switching processing method, UE, network equipment, a chip, a computer readable storage medium, a computer program product and a computer program, wherein the method comprises the following steps: transmitting the first information to a User Equipment (UE); the first information is at least used for assisting the UE to determine that the effective duration of the UE related information of the UE side is consistent with that of the network side, or used for determining the effective duration of the UE related information.

Description

Switching processing method, user equipment and network equipment

Technical Field

The present invention relates to the field of information processing technologies, and in particular, to a handover processing method, a User Equipment (UE), a network device, a computer storage medium, a chip, a computer-readable storage medium, a computer program product, and a computer program.

Background

In a New Radio Unlicensed (NR-U), for downlink transmission, a network device needs to perform Listen Before Transmit (LBT). If the listening result indicates that the channel is in an occupied state, the network device needs to back off for a period of time according to the specification and then continue listening to the channel, and the channel listening result is known to be in an idle state, so that data, such as a handover command, can be transmitted to the UE. Since the source network device may be an NR-U network device during the handover process, the network device can only send the handover command in the channel idle state, which results in a long time interval between when the handover command is actually issued to the UE and when the handover command is sent to the source network device by the target network device (handover request Acknowledgement (ACK)), resulting in resource failure.

Disclosure of Invention

To solve the foregoing technical problem, embodiments of the present invention provide a handover processing method, a UE, a network device, a computer storage medium, a chip, a computer-readable storage medium, a computer program product, and a computer program.

In a first aspect, a handover processing method is provided, which is applied to a source network device, and includes:

sending the first information to User Equipment (UE);

wherein, the first information is at least used for assisting the UE to determine that the effective duration of the UE related information of the UE side is consistent with that of the network side, or used for determining the effective duration of the UE related information

In a second aspect, a handover processing method is provided, which is applied to a user equipment UE, and the method includes:

receiving first information sent by source network equipment;

In a third aspect, a handover processing method is provided, which is applied to a source network device, and includes:

selecting a switching target network device and sending a switching request to the target network device;

receiving switching request confirmation information fed back by target network equipment;

sending second information to the target network equipment; the second information is used for assisting the target network equipment to determine the effective duration of the UE related information stored by the target network equipment, and the effective duration of the UE related information stored by the target network equipment determined by the UE is consistent with the effective duration of the UE related information stored by the target network equipment.

In a fourth aspect, a handover processing method is provided, which is applied to a target network device, and includes:

receiving a switching request sent by source network equipment;

sending a switching request confirmation message to the source network equipment;

receiving second information sent by the source network equipment; the second information is used for assisting the target network equipment to determine the effective duration of the UE related information stored by the target network equipment, and the effective duration of the UE related information stored by the target network equipment determined by the UE is consistent with the effective duration of the UE related information stored by the target network equipment.

In a fifth aspect, a source network device is provided, comprising:

the first communication unit is used for sending the first information to User Equipment (UE);

the first information is at least used for assisting the UE to determine that the effective duration of the UE related information of the UE side is consistent with that of the network side, or used for determining the effective duration of the UE related information.

In a sixth aspect, a UE is provided, including:

the second communication unit is used for receiving the first information sent by the source network equipment;

In a seventh aspect, a source network device is provided, including:

a third processing unit that selects a handover target network device;

a third communication unit that transmits a handover request to the target network device; receiving switching request confirmation information fed back by target network equipment; sending second information to the target network equipment; the second information is used for assisting the target network equipment to determine the effective duration of the UE related information stored by the target network equipment, and the effective duration of the UE related information stored by the target network equipment determined by the UE is consistent with the effective duration of the UE related information stored by the target network equipment.

In an eighth aspect, a target network device is provided, which includes:

the fourth communication unit receives a switching request sent by the source network equipment;

In a ninth aspect, a handover processing method is provided, which is applied to a target network device, and includes:

sending the first information to the source network device;

In a tenth aspect, there is provided a target network device comprising:

the fifth communication unit is used for sending the first information to the source network equipment;

In an eleventh aspect, a terminal device is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory, and executing the method of the second aspect or each implementation mode thereof.

In a twelfth aspect, a network device is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory, and executing the method in the first aspect, the third aspect, the fourth aspect, the fifth aspect, or each implementation manner thereof.

In a thirteenth aspect, a chip is provided for implementing the method in any one of the first to fifth aspects or implementations thereof.

Specifically, the chip includes: a processor configured to call and run the computer program from the memory, so that the device on which the chip is installed performs the method according to any one of the first aspect to the fifth aspect or the implementation manners thereof.

In a fourteenth aspect, a computer-readable storage medium is provided for storing a computer program, which causes a computer to execute the method of any one of the first to fifth aspects or implementations thereof.

In a fifteenth aspect, a computer program product is provided, comprising computer program instructions to cause a computer to perform the method of any one of the first to fifth aspects or implementations thereof.

In a sixteenth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of any one of the first to fifth aspects or implementations thereof.

By adopting the scheme, the effective duration of the UE related information of the UE is determined to be consistent with the effective duration of the UE related information of the network side through the first information assistance UE, or the effective duration of the UE related information is determined in an assistance mode. Therefore, the UE side and the network side can understand the effective time length for storing the UE related information correspondingly, so that the unnecessary repeated access and the like caused by the release of the UE related information by the network side when the UE performs the switching execution or the random access are avoided, and the speed of restoring the connection between the UE and the network side is improved.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application;

fig. 2 is a first flowchart illustrating a handover processing method according to an embodiment of the present application;

fig. 3 is a schematic flow chart of a handover processing method according to an embodiment of the present application;

fig. 4 is a first scenario diagram provided in the embodiment of the present application;

fig. 5 is a schematic view of a scenario provided in the embodiment of the present application;

fig. 6 is a third schematic flowchart of a handover processing method according to an embodiment of the present application;

fig. 7 is a schematic flowchart of a handover processing method according to a fourth embodiment of the present application;

fig. 8 is a schematic flowchart of a handover processing method according to an embodiment of the present application;

fig. 9 is a sixth schematic flowchart of a handover processing method according to an embodiment of the present application;

fig. 10 is a seventh flowchart illustrating a handover processing method according to an embodiment of the present application;

fig. 11 is a schematic flowchart of an eighth handover processing method according to an embodiment of the present application;

fig. 12 is a flowchart illustrating a handover processing method according to a ninth embodiment of the present application;

fig. 13 is a schematic flowchart illustrating a handover processing method according to an embodiment of the present application;

fig. 14 is an eleventh flowchart illustrating a handover processing method according to an embodiment of the present application;

fig. 15 is a first schematic diagram of a network device according to an embodiment of the present application;

fig. 16 is a schematic diagram of a UE composition structure provided in an embodiment of the present application;

fig. 17 is a schematic diagram of a network device composition structure according to an embodiment of the present application;

fig. 18 is a schematic diagram of a network device component structure provided in the embodiment of the present application;

fig. 19 is a schematic diagram of a network device composition structure according to an embodiment of the present application;

fig. 20 is a schematic structural diagram of a communication device according to an embodiment of the present invention;

FIG. 21 is a schematic block diagram of a chip provided by an embodiment of the present application;

fig. 22 is a schematic diagram of a communication system architecture provided in an embodiment of the present application.

Detailed Description

So that the manner in which the features and aspects of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings.

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical scheme of the embodiment of the application can 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.

For example, a communication system 100 applied in the embodiment of the present application may be as shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a UE120 (or referred to as a communication terminal, terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with UEs 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 Network device (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 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 also includes at least one UE120 located within the coverage area of the network device 110. "UE" as used herein 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 another UE's device configured to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A UE that is arranged to communicate over a radio interface may be referred to as a "radio communication terminal", "radio terminal" or "mobile terminal".

Optionally, a Device to Device (D2D) communication may be performed between UEs 120.

The 3GPP RAN working group agreed to the establishment (WID RP-182878) of the NR unlicensed working mode in 2018, month 12, which aims to make NR work in an unlicensed frequency band, including the following working scenarios: a carrier aggregation scenario; a dual connectivity work scenario; independent working scene.

Generally, the operating Band (Band) of NR-U is 5GHz unlicensed spectrum and 6GHz unlicensed spectrum, (e.g., US 5925-; on unlicensed spectrum, the design of NR-U should guarantee fairness with other systems already operating on these unlicensed spectrum, such as WiFi and the like. The principle of fairness is that the impact of NR-U on systems already deployed on unlicensed spectrum (e.g., WiFi) cannot exceed the impact between these systems.

In order to ensure fair coexistence between systems over unlicensed spectrum, energy detection has been agreed as a basic coexistence mechanism. A general energy detection mechanism is an LBT mechanism, and the basic principle of the mechanism is that a network device or a terminal (transmission end) needs to listen for a period of time according to a rule before transmitting data on an unlicensed spectrum. If the sensed result indicates that the channel is in an idle state, the transmitting end may transmit data to the receiving end. If the interception result indicates that the channel is in an occupied state, the transmission end needs to back off for a period of time according to the specification and then continue to intercept the channel, and the data can be transmitted to the receiving end only if the channel interception result is in an idle state.

An LTE LAA unlicensed frequency band channel access process comprises the following steps:

for downlink data transmission, in an unlicensed frequency band, network equipment needs to perform LBT; in LAA, the priority of channel access is determined by:

where Mp is related to the listening channel time for performing channel access. Specifically, the network device needs to perform channel sensing for a time Td, where Td is 16us + Mp × 9 us.

CWmin, p and CWmax, p are related to the random listening channel time during the channel access process. Specifically, when the network device listens that the Td time channel is idle, it is necessary to listen to the channel N times again, and the time duration of each time is 9 us. Where N is a random number from 0 to CWp.

Tmcot, p is the longest time for occupying the channel after the network device occupies the channel, and it has a relationship with the channel priority adopted by the network device, for example, if the priority is 1, the channel occupies the channel for 2ms at most after the channel interception is successful.

In summary, for the UE side, it is necessary for the network device to transmit data to the UE within the MCOT time, and if the network device does not seize the channel, that is, outside the MCOT time, the UE does not receive the scheduling data from the network device to the UE.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

An embodiment of the present application provides a handover processing method, which is applied to a source network device, and as shown in fig. 2, the method includes:

step 21: sending the first information to User Equipment (UE);

The following describes the scheme provided by the present embodiment in various scenarios:

scenario 1, the target network device determines the first information, and indicates the first information to the UE through the source network device. Specifically, the method comprises the following steps:

the method further comprises the following steps: receiving handover request confirmation information sent by the candidate target network device, wherein the handover request confirmation information carries the first information.

In this scenario, the first information is carried in a handover command sent to the UE;

the first information is used for indicating the retention time of the UE related information in the target network equipment. The first information includes, but is not limited to, at least one of: the time period of the effective retention of the UE related information, the time difference information between the target network equipment and the source network equipment, the starting time of the first timer and the duration of the first timer.

Wherein the UE-related information includes, but is not limited to, at least one of: context content of the UE, reserved resources/configuration, RA resources, bearer corresponding configuration, QoS (Quality of Service) parameters, Service type information.

The time of turning on the first timer may be understood as an absolute time or a radio frame. Wherein the absolute time may be determined based on the universal time.

In this scenario, the specific processing flow, in combination with fig. 3, may be as follows:

the source network equipment selects candidate switching target network equipment and sends a switching request to the candidate target network equipment;

the candidate target network device makes a handover decision to determine whether the UE can be accessed. If yes, the candidate target network device (i.e. one of the target network devices that the UE can access) sends a handover request acknowledgement to the source network device, and meanwhile, the message carries the first information; the first timer is configured to maintain an effective duration of the UE-related information stored on the candidate target network device side. It is noted that the first timer may be T304 on the network device side. The effect on T304 can be shown in the following table:

as can be seen from the above table, in handover, a T304timer is introduced for indicating the time of valid handover. T304 is turned on when the handover command is received and is stopped when RA is successful. If T304 times out, the RA handover is not successful, and RRC reestablishment or SCG failure information procedure needs to be performed. It is generally understood that the target network device carries T304 for the UE in the handover request ACK, and starts a timer corresponding to T304 after the information is transmitted, and when the timer times out, the target network device deletes the resource configuration and UE context reserved for the UE. When the first timer is overtime, the network equipment releases the UE related information; and when receiving a switching completion message sent by the UE, if the first timer is still running, stopping the timer.

It should be noted that the first timer may also be a new timer, i.e. a timer other than T304. And the target base station and/or the UE determines the effective duration of the UE related information according to the new timer, or the auxiliary base station and/or the UE determines that the effective durations of the UE related information of the UE side and the network side are consistent.

It should be noted that the source network device may instruct the target network device to start a first timer when the first preset condition is met;

wherein, the first preset condition comprises at least one of the following conditions:

receiving switching request confirmation information; sending a switching command; the handover command is successfully sent. The receiving of the switching request confirmation information may be when the switching request confirmation information is received or when a first preset time length is reached after the switching confirmation information is received; the first preset time period may be set according to practical situations, for example, may be 0.5ms, and the like, and is not limited herein.

Sending a handover command, which can be understood as that the source network device only needs to send a handover command to the UE, and the handover command satisfies a first preset condition; or, the first preset condition may be satisfied when the source network device sends a second preset duration after sending a handover command to the UE; the second preset time period may be set according to practical situations, and is not limited herein.

When the switching command is successfully sent, the switching command can be understood as the time when the switching command is successfully sent, or the switching command can be understood as the time when the switching command is successfully sent for a third preset time length; the third preset time period can also be set according to the actual situation and is not limited. (ii) a

The switching command is successfully sent, or the switching command can be understood as the time when the switching command successfully received indication sent by the UE is received, or the switching command can be understood as the time when the seventh preset time length after the switching command successfully received indication sent by the UE is received; the seventh preset time period can also be set according to actual conditions and is not limited. The lengths of the first preset time period, the second preset time period, the third preset time period and the seventh preset time period may be the same or different, or may be partially the same.

In addition, the determination that the handover command is successfully sent may be when HARQ-ACK feedback is received or when Radio Link Control (RLC) ARQ-ACK is received.

The UE may determine, by using the first information, a time and a duration for starting a first timer (timer), and further determine an effective duration of the UE-related information on the network side, that is, determine an effective duration of a resource for storing the UE-related information on the network side.

The time difference between the target network device and the source network device may be, for example, a time difference when GPS time is not synchronized between the two network devices.

Based on the foregoing processing flow, referring back to fig. 3, the method may include:

the source network equipment sends a switching command to the UE;

and the UE receives a switching command sent by the source network equipment and executes a switching process according to the message of the switching command. And the UE determines whether the UE related information reserved on the network equipment side is valid according to the first information carried in the switching command. When the UE-related information valid is not expired, for example, the timer, or the expiration time point when the UE-related information is valid, the UE performs a handover procedure, or an RA procedure in handover. Otherwise, the handover is considered to be failed, and/or the UE performs an RRC connection re-establishment procedure (MCG handover) or indicates an SCG failure information procedure to the network.

Further, the description is made with reference to fig. 4 and 5, wherein the horizontal axis represents time, and the left to right represents time from small to large. Fig. 4 illustrates that, after the target network device side starts the first timer until the first timer expires, the effective duration of the UE related information is saved for the first timer; when the UE side receives the handover command sent by the source network device, the first timer of the UE side is started, and as can be seen from the figure, when the first timer of the target network device expires, the first timer of the UE side has not been stopped, so that the UE may possibly cause a possibility that the UE considers that the target network device still stores the related information and actually the target network device has released the information in the handover process.

Fig. 5 illustrates that the UE can receive the handover command sent by the source network device and also receive the first information carried therein, and determine the valid duration of the relevant information stored at the target network device side according to the first information, so that the UE can not perform the processing such as handover or random access when determining that the relevant information has been released at the target network device side.

It can be seen that the disadvantage of the prior art is that the network may release UE resources, while the UE also considers the current handover feasible, resulting in unnecessary delay and signaling overhead. In this scenario, the UE can determine the effective time for the target network device to actually maintain the context of the UE and the configured resource, so as to avoid inconsistency between the UE and the network in understanding resource reservation, and avoid unnecessary UE behavior, for example, trying RA all the time, but actually the network has released the context of the UE, and the like, so that the UE can recover connection with the network as soon as possible.

Scenario 2 differs from scenario 1 in that the first information of this scenario is generated by the source network device.

The method further comprises the following steps:

first information is generated.

The specific content of the first information of this scenario may be different from scenario 1, for example, the specific content may include: the time of the delay of the issuing of the switching command, or the number of times of the failure of the issuing of the switching command.

The method further comprises one of:

carrying first information in a handover command;

the first information is carried in an RRC message.

That is, the source network device carries the first information in the handover command or in the RRC message after the handover command. The RRC message may be a dedicated RRC message for notifying the UE of the first information. The sending time of the RRC message may be sent to the UE at the time of issuing the handover command or at the first time after issuing the handover command. The time difference between the first time and the handover command may be a fourth preset time duration.

The processing of this scenario will be described with reference to fig. 6 and 7:

the source network equipment selects candidate switching target network equipment and sends a switching request to the target network equipment;

the candidate target network device makes a handover decision HO decision to determine whether the UE can be accessed. If yes, the candidate target network device sends a switching request ACK to the source network device.

The source network device generates first information, the first information comprising at least one of: the time of the HO command issuing delay or the number of times of HO command issuing failure. Accordingly, the first information may be used to assist the UE in determining at least one of: the time/time duration/expiration of the actual value of the resource and/or UE context reserved by the target network device, the time/time duration/expiration of the actual value of the configuration information included in the handover command, the time for which the first timer (e.g., T304 timer) of the target network device is started, the starting time for which the target network device holds the UE-related information, the expiration time for which the target network device holds the UE-related information, the time for which the timer of the target network device has been running when the handover command is received, the time for which the target network device has held the UE-related information when the handover command is received, and the remaining effective time of the UE-related information in the target network device when the handover command is received.

Wherein the UE related information includes but is not limited to at least one of the following: UE context, reserved resource/configuration, RA resource, bearer corresponding configuration, QoS parameter, service pattern information.

The description of the first timer is similar to that of scenario 1, and is not repeated.

The source network device sends a handover command. In the schematic manner shown in fig. 6, the source network device sends the first information after sending the handover command, and the first information may be carried by RRC signaling; in the manner illustrated in fig. 7, the source network device may carry the first information in the handover command.

And the UE receives a switching command sent by the source network equipment and executes a switching process according to the message of the switching command. And the UE receives the RRC message containing the first information, or the UE acquires the first information according to the switching command. And the UE determines whether the UE related information reserved on the network equipment side is valid according to the first information. When the UE-related information valid is not expired, for example, the timer, or the expiration time point when the UE-related information is valid, the UE performs a handover procedure, or an RA procedure in handover. Otherwise, the handover is considered to be failed, and/or the UE performs an RRC connection re-establishment procedure (MCG handover) or indicates an SCG failure information procedure to the network.

It should also be noted that there may be a different process than the foregoing process flow that is,

the first information further comprises at least one of the following:

resources reserved by the target network device;

at least one of the actual effective time, the effective duration and the deadline of the UE context;

at least one of the actual effective time, the effective duration and the deadline of the configuration information contained in the switching command;

the time when the first timer of the target network equipment is started;

the target network equipment maintains the starting time of the UE related information;

the target network equipment maintains the deadline of the UE related information;

the running time of the first timer of the target network equipment when the switching command is sent;

the time length that the target network device already holds the UE related information when sending the switching command;

and the remaining effective duration of the UE related information in the target network equipment when the switching command is sent.

That is, in this scenario, the source device may confirm the assistance information and transmit the assistance information to the UE. The specific determination mode, the resources reserved by the target network device, can be determined by the information sent by the target network device. The validity time of the UE context may determine at least one of the validity time of the UE context for storing the information, the validity duration, and the expiration time according to the information sent by the target network device. The effective time of the time, the time of the arrival and the like of the configuration information contained in the switching command can be determined by the source network device according to the time of sending the switching command. In addition, the starting time of the first timer in the target network equipment can be determined based on the received switching request confirmation message sent by the target network equipment, and accordingly, the starting time of the target network equipment for reserving the UE related information can be obtained; in addition, since the source network device can obtain the duration of the first timer of the target network device, the deadline for the target network device to store the UE-related information can be determined; in addition, since the source network device can determine the time when the source network device sends the handover command, the time length during which the first timer of the target network device has been running when the handover command is sent can be determined, and accordingly, the time length during which the target network device has saved the UE-related information when the handover command is sent can be determined, and the remaining effective time length during which the target network device can save the UE-related information can be determined. That is, the source device may acknowledge the auxiliary information according to (the content of) the handover request ACK message from the target base station, or the source device may acknowledge the auxiliary information according to (the content of) the handover request ACK message from the target base station and at least one of: the time of the delay of the issuing of the switching command and the number of times of the failure of the issuing of the switching command. In this scenario, the source base station may send the updated information to the UE, or may send all the information to the UE and then determine the updated information by the UE.

In this way, the side information based processing can be done by the source base station side. Alternatively, the subsequent processing based on the auxiliary information can also be done by the UE side, and the source network device side can reduce the content of the processing.

A disadvantage of the prior art is that it is possible that the network releases UE resources, while the UE also considers the current handover feasible, resulting in unnecessary delay and signaling overhead. In this scenario, the UE can determine the effective time for the target network device to actually maintain the UE context and the configured resource, so as to avoid inconsistency between the UE and the network for understanding resource reservation, and avoid unnecessary UE behavior (RA is always attempted, but actually the network has released the UE context, etc.), so that the UE can recover connection with the network as soon as possible.

On the basis of the above scenario 2, the following two seed processing scenarios may also be included:

sub-processing scenarios 1,

The method further comprises the following steps:

determining the updated parameter of the first timer according to at least one of the following information, and sending the updated parameter of the first timer to the UE:

the parameters of the original first timer, the time of issuing delay of the switching command, the times of issuing failure of the switching command, the time of starting the first timer by the network, the deadline time of effective retention of UE related information, the time period of effective retention of the UE related information, the time difference information of the target network equipment and the source network equipment, and the duration of the first timer.

For example, the source network device determines the modified T304 parameter based on one of the following information. For example, the original T304 parameter, the time for the HO command issuing delay, or the number of times for the HO command issuing failure, the time for the network to start the T304/first timer, the time for the network device side T304timer to start, the expiration time for the UE related information to effectively persist, the time period for the UE related information to effectively persist, the time difference information between the target network device and the source network device, and the duration of the first timer.

Or, the method may further include sending the parameter of the original first timer, the time for delaying the sending of the handover command, the number of times for failing to send the handover command, the time for starting the first timer by the network, the expiration time for effectively reserving the UE related information, the time period for effectively reserving the UE related information, the time difference information between the target network device and the source network device, and the duration of the first timer, which are sent to the UE, so that the UE can determine the duration of the updated first timer. That is to say, the UE can ensure that the remaining time of the effective duration of the UE related information saved by the network side understood by the UE is the same as the remaining effective duration of the UE related information saved by the network side by updating the duration of the first timer understood by the UE.

Thus, the UE performs handover according to the updated T304. The updated T304 may ensure that the UE and the target network device have consistent understanding of the retention time of the UE-related information.

Sub-scenario 2,

The first information further includes:

a second duration; wherein the second duration is different from the duration in the parameter of the first timer.

The second duration is used for indicating the effective duration of the target network equipment for reserving the UE related information for the UE, or the second duration is used for enabling the effective duration of the UE and the effective duration of the network reserved UE related information to be consistent. It is noted that the second duration is implemented based on the second timer, that is, the second duration of the second timer is different from the duration in the parameter of the first timer (or the updated first timer).

Wherein the method further comprises: determining a parameter of the second duration based on at least one of:

parameters of a first timer, time of issuing delay of a switching command, times of issuing failure of the switching command, time of starting the first timer by a network, deadline time of effective retention of UE (user equipment) related information, time period of effective retention of the UE related information, time difference information of target network equipment and source network equipment, and duration of the first timer.

The second duration may be implemented by a new timer, for example, a second timer different from the first timer. Correspondingly, the UE starts the second timer after receiving the handover command, and during the running period of the second timer, the UE considers the UE information valid retained by the target network device.

The source network device determines the second duration, which may be determined for the effective duration of remaining UE related information stored in the target network device; for example, the parameter of the first timer is successfully sent after the handover command is unsuccessfully sent for multiple times, and at this time, a certain duration is consumed, and at this time, the duration needs to be subtracted from the first timer to obtain a second duration. Or, the remaining duration of the first timer may be determined as the second duration according to the start time of the first timer and the time for sending the handover command. Or, the adjusted second duration may be obtained by subtracting the time difference from the previously obtained second duration in combination with the time difference between the target network device and the source network device; because a time difference exists between the target network device and the source network device, a certain time delay exists when the source network device sends information to or receives information from the target network device, and the time delay can be added to the process of correcting the second time length to obtain the adjusted second time length. Of course, the above is merely an example, and in fact, other combinations and manners of determining the second duration may exist, which are mainly determined based on the foregoing parameters, and this embodiment is not exhaustive.

For example, the source network device determines the timer parameter, such as duration, based on one of the following information: t304 parameter/first timer parameter, time of HO command issuance delay, or number of times of HO command issuance failure, time of network starting T304/first timer, time of network device side T304timer starting, expiration time of UE related information valid persistence, time period of UE related information valid persistence, time difference information of target network device and source network device, duration of first timer.

Therefore, by adopting the scheme, the UE can be assisted by the first information to determine that the effective duration of the UE related information of the UE is consistent with the effective duration of the UE related information of the network side, or the effective duration of the UE related information can be assisted to determine. Therefore, the UE side and the network side can understand the effective time length for storing the UE related information correspondingly, so that the unnecessary repeated access and the like caused by the release of the UE related information by the network side when the UE performs the switching execution or the random access are avoided, and the speed of restoring the connection between the UE and the network side is improved.

An embodiment of the present application provides a handover processing method, which is applied to a user equipment UE, and as shown in fig. 8, the handover processing method includes:

step 31: receiving first information sent by source network equipment;

scenario 1, when the first information is sent by the source network device, the first information may be determined by the target network device. The present scenario addresses this situation.

The first information includes, but is not limited to, at least one of: the time period of the effective retention of the UE related information, the time difference information between the target network equipment and the source network equipment, the starting time of the first timer and the duration of the first timer.

Wherein the UE-related information includes, but is not limited to, at least one of: context content of the UE, reserved resources/configuration, RA resources, bearer corresponding configuration, Quality of Service (QoS) parameters, Service type information.

In this scenario, the specific processing flow, also see fig. 3, may be as follows:

the candidate target network device makes a handover decision to determine whether the UE can be accessed. If yes, the candidate target network device (i.e. one of the target network devices that the UE can access) sends a handover request acknowledgement to the source network device, and meanwhile, the message carries the first information; the first timer is configured to maintain an effective duration of the UE-related information stored on the candidate target network device side. It is noted that the first timer may be T304 on the network device side. For the relevant description of T304, refer to the above embodiments, which are not repeated herein.

When the first timer is overtime, the network equipment releases the UE related information; and when receiving a switching completion message sent by the UE or when the RA succeeds, if the first timer is still running, stopping the timer.

The source network equipment sends a switching command to the UE;

and the UE receives a switching command sent by the source network equipment and executes a switching process according to the message of the switching command. And the UE may determine, based on the first information, an effective storage duration for the target network device side to store the UE-related information. For example, the UE may determine, according to the first information carried in the handover command, whether UE related information that is reserved on the network device side is valid, or determine an effective storage duration for the target network device side to store the UE related information.

Specifically, the method for determining the effective storage duration may include:

according to the effective retention termination time of the UE related information, the expiration time for storing the UE related information at the target network equipment side is determined, and further the UE can determine the residual effective duration in the process of executing handover or performing random access operation.

The time period for the UE-related information to effectively persist may be understood as an absolute time period for storing the UE-related information at the network side, for example, the absolute time period may be represented by a radio frame, or may be represented by universal time, so that the UE can determine the effective time period for storing the UE-related information at the network side.

The time difference information between the target network device and the source network device can determine, based on the information, a relative time at which the source network device acquires the first information of the target network device, for example, the target network device transmits the first information at the first time, so that the source network device side can acquire the first information at the time of the first time + the time difference, and thus, when the first information is received, the effective duration of remaining UE-related information stored by the target network device side can be determined, and further, the effective duration of UE-related information stored by the target network device side that the UE side understands itself can be adjusted, so that the two information are kept consistent. Or, the effective duration of the UE related information saved by the target network device side may be determined, specifically, the start time and the end time of the UE related information saved, so that it can be further ensured that the effective durations of the UE related information saved, confirmed by the UE side and the network side, are consistent.

Based on the starting time of the first timer and/or the duration of the first timer, the UE side can determine the effective duration for storing the UE related information by the network side based on the absolute time.

The method further comprises the following steps: and executing switching processing or executing random access processing in the switching process when determining that the UE related information stored by the target network equipment side is valid based on the valid duration of the UE related information stored by the target network equipment side.

Further, the method may further include: and based on the effective duration of the UE related information saved by the target network equipment side, when the UE related information saved by the target network equipment side is determined to be invalid, executing at least one of the following steps:

confirming a handover failure; performing an RRC connection reestablishment procedure; the SCG failure information procedure is indicated to the network.

That is, when the UE determines the UE-related information valid, for example, the timer has not timed out or an expiration time point at which the UE-related information effectively remains, the UE performs a handover procedure, or an RA procedure in handover. Otherwise, the handover is considered to be failed, and/or the UE performs an RRC connection re-establishment procedure (MCG handover) or indicates an SCG failure information procedure to the network.

The method further comprises one of:

acquiring first information carried by the switching command through the switching command; and acquiring the first information carried by the RRC message.

the candidate target network device performs HO decision to determine whether the UE can be accessed. If yes, the candidate target network device sends a switching request ACK to the source network device.

And the UE receives a switching command sent by the source network equipment and executes a switching process according to the message of the switching command. The UE receives an RRC message including the first information.

And the UE determines whether the UE related information reserved on the network equipment side is valid according to the first information. When the UE-related information valid is detected, for example, the timer has not timed out or the expiration time point when the UE-related information is valid, the UE performs a handover procedure or an RA procedure in handover. Otherwise, the handover is considered to be failed, and/or the UE performs an RRC connection re-establishment procedure (MCG handover) or indicates an SCG failure information procedure to the network.

At this point, the UE may determine the following information: resources reserved by the target network device;

the time when the first timer of the target network equipment is started;

The specific determination mode, the resources reserved by the target network device, may be determined by information sent by the source network device. The validity time of the UE context may be determined based on at least one of a termination time for which the UE-related information is validly retained, and a time period for which the UE-related information is validly retained. The starting time of the first timer in the target network equipment can be determined based on the received first information, and accordingly, the starting time of the target network equipment for reserving the UE related information can be obtained; in addition, since the source network device can obtain the duration of the first timer of the target network device, the deadline for the target network device to store the UE-related information can be determined; in addition, since the UE can determine the time when the UE receives the handover command, the time length during which the first timer of the target network device has been running when the handover command is received can be determined, and accordingly, the time length during which the target network device has saved the UE-related information when the handover command is received can be determined, and the remaining effective time length during which the target network device can save the UE-related information can be determined.

the aforementioned information may be carried in the first information, that is, the first information transmitted by the source network device may further include at least one of:

resources reserved by the target network device;

the time when the first timer of the target network equipment is started;

How to determine the above information on the source network device side has been described in the foregoing embodiments, and is not described here again.

sub-processing scenarios 1,

The first information further includes: an updated first timer.

The source network equipment side modifies the parameters of the first timer and then sends the updated first timer to the UE.

Alternatively, it is also possible: receiving a parameter sent by the source network device for modifying the first timer, and updating the first timer based on the parameter for modifying the first timer.

Wherein the parameter may comprise at least one of: the parameters of the original first timer, the time of issuing delay of the switching command, the times of issuing failure of the switching command, the time of starting the first timer by the network, the deadline time of effective retention of UE related information, the time period of effective retention of the UE related information, the time difference information of the target network equipment and the source network equipment, and the time length of the original first timer.

The UE determines an updated first timer according to one of the following information. For example, the original T304 parameter is determined to be sent to switch the instruction after a period of time after the first timer is started in combination with the time of the HO command issue delay, and then the time length of the updated first timer may be obtained by subtracting the period of delay from the original first time length of the first timer. Or, determining the time delay caused by several times of handover command issuing failures by the number of times of HO command issuing failures included in the first information, and determining that the first timer needs to be adjusted if the UE side is consistent with the network side by combining the duration of the original first timer or the start time of the first timer, for example, subtracting the time delay of the issuing failure from the first duration of the first timer to obtain an updated first timer. Of course, the foregoing processing may also determine, in combination with the deadline for effective retention of the UE-related information and the current time, that the UE needs to adjust the first duration of the first timer. It should be understood that other adjustment methods may exist, but are not exhaustive in this embodiment.

In this way, the UE performs handover according to the updated first timer, such as T304. Because the duration of the first timer is modified according to the relevant modification parameters, the UE side starts the updated first timer to determine the effective duration for the network side to store the UE-related information, which can be kept consistent with the remaining effective duration for the target network device side to retain the UE-related information, so that the updated T304 can ensure that the UE and the target network device understand the retention time of the UE-related information consistently.

Sub-scenario 2,

The first information further includes:

a second duration; wherein the second duration is different from the duration in the parameter of the first timer

The second duration is used for indicating the effective duration of the target network equipment for reserving the UE related information for the UE, or the second duration is used for enabling the effective duration of the UE and the effective duration of the network reserved UE related information to be consistent.

The second duration is different from a duration of the first timer.

In this scenario, similarly, the second duration may be determined by the source network device according to information issued by the source network device, for example, the second duration may include at least one of the following:

For example, a parameter of the second timer or the second duration, such as the duration, is determined based on one of the following information: the parameter of T304, the time of the HO command issuing delay, or the number of times of HO command issuing failure, the time of starting T304/first timer by the network, the time of starting T304timer on the network equipment side, the deadline of effective storage of UE related information, the time period of effective storage of UE related information, the time difference information of the target network equipment and the source network equipment, and the duration of the first timer.

The second duration may be determined in a manner that determines the second duration for the effective duration of remaining UE related information stored in the target network device; for example, the parameter of the first timer is successfully sent after the handover command is unsuccessfully sent for multiple times, and at this time, a certain duration is consumed, and at this time, the duration needs to be subtracted from the first timer to obtain a second duration. Or, the remaining duration of the first timer may be determined as the second duration according to the start time of the first timer and the time for sending the handover command. Or, the adjusted second duration may be obtained by subtracting the time difference from the previously obtained second duration in combination with the time difference between the target network device and the source network device; because a time difference exists between the target network device and the source network device, a certain time delay exists when the source network device sends information to or receives information from the target network device, and the time delay can be added to the process of correcting the second time length to obtain the adjusted second time length. Of course, the above is merely an example, and in fact, other combinations and manners of determining the second duration may exist, which are mainly determined based on the foregoing parameters, and this embodiment is not exhaustive.

Based on the foregoing various scenarios, when the processing method is used in combination with one or more of the foregoing scenarios, the present embodiment may further provide the following more processing scenarios, and it should be noted that the following scenarios may also be used alone, that is, the following two processing scenarios may be performed without performing the processing provided by the foregoing embodiments, specifically as follows:

processing scenario 1,

Executing switching based on the switching command, and backing back to random access based on non-competition to random access based on competition when a third preset condition is met in the switching process;

wherein the third preset condition comprises at least one of:

non-contention based random access resource invalidation;

the non-contention based random access fails.

That is, in the handover procedure, when the UE fails in the non-Contention Based Random Access (CFRA) or when the CFRA resource is invalid, the UE falls back from the CFRA to the Contention Based Random Access (CBRA).

Referring to fig. 9, may include:

the candidate target network device makes a handover decision (HO decision) to determine whether the UE can be accessed. If yes, the candidate target network device sends switching request confirmation information to the source network device.

The source network device sends a handover command.

And the UE executes a switching process according to the switching command, wherein the switching process comprises a CFRA process. The UE falls back from the CFRA procedure to the CBRA procedure when at least one of the following third preset conditions is satisfied: CRFA resource invalidation and CFRA failure.

When the UE fails the non-contention based random access, it may indicate the random access failure to a higher layer.

Or, the random access failure may not be indicated to the higher layer, and specifically, the method further includes: when the non-contention based random access fails, the random access failure is not indicated to a higher layer. That is, when the UE side determines that the CFRA fails (or the CFRA is invalid), the Media Access Control (MAC) layer does not indicate a Random Access failure (Random Access protocol) to the higher layer.

Since whether the network side releases the UE context and the resource configuration reserved for the UE at the same time is uncertain, there may be a problem that the CFRA resource not valid or the CFRA fails in the case that UE context and other UE related information are reserved. If the RA is directly considered to fail, or the re-establishment is triggered, or the SCG change failure execution is triggered according to the existing protocol, without returning to the CBRA process of the UE, the UE may access to the network delay, even the UE and the network communication may be delayed for a long time due to the MCOT missing time caused by the UE delayed access, which may cause the problems of the service QoS being reduced, the UE experience being deteriorated, and the like. The processing scenario may solve the problem by backing up CBRA and/or not reporting RA promble.

Processing scenario 2,

In this scenario, multiple sets of non-contention random access resources may be configured for the UE.

The method further comprises one of:

processing based on at least one set of non-competing random access resources in the plurality of sets of non-competing random access resources; when the processing based on at least one set of non-contention based random access resources fails, not indicating the random access failure to the higher layer;

processing based on at least one set of non-competing random access resources in the plurality of sets of non-competing random access resources; when the processing based on at least one set of non-contention based random access resources fails, indicating the random access failure to a higher layer;

processing based on a first non-contention based random access resource of the plurality of sets of non-contention based random access resources; when the processing of a first non-contention based random access resource is judged to fail, if other non-contention based random access resources except the first non-contention based random access resource exist, the random access failure is not indicated to a high layer;

processing based on a first non-contention based random access resource of the plurality of sets of non-contention based random access resources; when the processing of the first non-contention based random access resource is judged to fail, if other non-contention based random access resources except the first non-contention based random access resource exist, the random access failure is indicated to a high layer.

Specifically, the UE may perform processing via one of the sets of non-contention random access resources. At this time, if a failure occurs, a random access failure may be indicated to a higher layer. The UE may then select another set of non-contention random access resources again for access.

The processing scenario may include: multiple sets of non-contention random access resources may be configured for the UE. At this time, the UE may perform processing through at least one set of non-contention random access resources. At this time, when any one set of access fails, the random access failure may be indicated to the higher layer, or the random access failure may not be indicated to the higher layer. Alternatively, when all the accesses fail, the random access failure may be indicated to the higher layer, or the random access failure may not be indicated to the higher layer.

In addition, the processing scenario may include: multiple sets of non-contention random access resources may be configured for the UE. At this time, when it is determined that the processing of the first non-contention based random access resource fails, if there is another non-contention based random access resource other than the first non-contention based random access resource, the random access failure is not indicated to the higher layer.

That is, the UE may perform processing via one of the non-contention random access resources. At this time, if a failure occurs, the random access failure may not be indicated to the higher layer. The UE may then select another set of non-contention random access resources again for access.

Different from the foregoing processing scenario 1, multiple sets of CFRA resources can be set in this scenario, where at least one of the following configurations is different in different CFRA resources: the resource valid starts are different, PRACH scene occast identifiers index are different, PRACH resource time domain/frequency domain position intervals are different, and preamble sequence preamble identifiers index are different.

Referring to fig. 10, the present processing scenario may include the following processing steps:

the candidate target network device makes a handover decision HO decision to determine whether the UE can be accessed. If yes, the candidate target network device sends a switching request ACK to the source network device. The target network device configures at least one set of CFRA resources, where different CFRA resources have at least one different configuration, and the specific configuration content is as shown above and will not be described herein again. Therefore, a plurality of sets of CFRA resources can be utilized, the positions of RA resources which can be tried to use are increased, the total valid time of the CFRA resources is increased, and the success chance of RA is improved.

Wherein, different CFRA resources may correspond to different usage priorities, and the usage priorities of the different CFRA resources may be configured to the UE.

The source network device sends a handover command. The handover command carries at least one set of CFRA resources as described above, i.e. may be understood as a first CFRA resource.

And the UE executes a switching process according to the message content in the switching command, wherein the switching process comprises a CFRA process.

In the processing process, when the UE can judge that the CFRA fails but RA corresponding to other CFRA resources is not tried, the MAC does not indicate the random access failure to a high layer; alternatively, the MAC also does not indicate random access failure to higher layers when multiple sets of CFRA attempts have failed.

For example, three sets of CFRA resources are configured for the UE to be handed over, the starting time of each set of resource valid is different, for example, T1, T2, and T3 are valid respectively, if the handover command is received by the UE between T1 and T2, the UE performs the CFRA procedure using the CFRA resources corresponding to T2 and/or T3.

For another example, 2 sets of CFRA resources are configured for the UE to be handed over, each set of resources is different in PRACH occasion index, for example, one is index1 and one is index2, because LBT causes the UE to receive HO command long after the target network device sends a handover request ACK, in order to improve the resource location/opportunity of CFRA that the UE can try, the UE uses the resources of two sets of CFRA to perform a CFRA procedure, so as to increase the opportunity that the UE accesses the target network within the limited MCOT time.

For another example, 2 sets of CFRA resources are configured for the UE to be handed over, where the starting time of each set of resource valid is different, for example, T1 and T2 are valid respectively, because LBT causes the UE to receive HO command after the target network device sends the handover request ACK for a long time, at this time, a set of CFRA may have not been valid, and in order to improve the resource location/opportunity of the CFRA that the UE can try, the UE performs the CFRA procedure using the resources of the two sets of CFRA, so as to increase the opportunity that the UE accesses the target network within the limited MCOT time.

For another example, 2 sets of CFRA resources are configured for the UE to be handed over, and optionally, the priority of use of each set of resources is notified at the same time. The UE executes the RA process by using the CFRA resources with high priority or any one set of CFRA resources, if the RA fails, the UE does not report the RA report, and then tries to adopt the other set of CFRA resources to execute the RA process until the RA fails or the RA succeeds. This has the benefit of increasing the chance that the UE will access the target network for a limited MCOT time.

Since whether the network side releases the UE context and the resource configuration reserved for the UE at the same time is uncertain, there may be a problem that the CFRA resource not valid or the CFRA fails when UE related information such as the UE context is reserved. If the RA is directly considered to fail, or the re-establishment is triggered, or the SCG change failure execution is triggered according to the existing protocol, without returning to the CBRA process of the UE, the UE may access to the network delay, even the UE and the network communication may be delayed for a long time due to the MCOT missing time caused by the UE delayed access, which may cause the problems of the service QoS being reduced, the UE experience being deteriorated, and the like. The scheme solves the problem by configuring/carrying at least one CFRA resource.

An embodiment of the present application provides a handover processing method, which is applied to a source network device, and as shown in fig. 11, the method includes:

step 41: selecting a switching target network device and sending a switching request to the target network device;

step 42: receiving switching request confirmation information fed back by target network equipment;

step 43: sending second information to the target network equipment; the second information is used for assisting the target network equipment to determine the effective duration of the UE related information stored by the target network equipment, and the effective duration of the UE related information stored by the target network equipment determined by the UE is consistent with the effective duration of the UE related information stored by the target network equipment.

That is to say, the present embodiment does not involve the influence on the air interface and the UE, and the effect similar to the foregoing embodiment is achieved in a network side interaction manner.

After the source network device sends the handover command or after the handover command is successfully sent, specific indication information, such as a handover command sending confirmation message, may be sent to the target network device/the candidate target network device, so as to ensure that the UE and the target network device understand whether the UE-related information is valid or not consistently, or indicate the target network device that the handover command sent to the UE is successfully sent, or indicate the target network device that the resource maintenance/timer maintenance status is restarted.

Before sending the second information to the target network device, the method further includes:

sending a switching command to the UE; or, successfully sending a handover command to the UE; alternatively, an indication is received that the handover command was successfully received by the UE. Wherein, sending the handover command to the UE may be understood as sending the handover command to the UE for the first time by the source network device; in addition, the sending of the second information may be when a fifth preset time length after the first sending of the handover command is reached; of course, if the source network device can send the handover command multiple times, it can also be understood that the handover command is sent for the second time, or for the third time, which is not exhaustive here. The successful sending of the switching command to the UE may be considered as successful sending of the switching command when receiving the confirmation information fed back by the UE, and in addition, the timing of sending the second information may be a time when the successful sending of the switching command is confirmed, or may be a time when a sixth preset time length after the successful sending of the switching command is confirmed. The fifth preset time period may be the same as or different from the sixth preset time period. In yet another case, the second information can be transmitted upon receiving an indication of successful reception of the handover command by the UE; here, it may be specifically configured that the second information is determined to be sent at the time when the instruction of successful reception of the handover command is received, or the second information is sent after a period of time after the instruction of successful reception of the handover command is received; the duration here can be set according to actual conditions, and is not exhaustive.

In this embodiment, see fig. 12, the process may include:

the source network equipment selects candidate switching target network equipment and sends a switching request to the candidate target network equipment; optionally, the source network device notifies the target network device of the cell type of the local cell, for example, whether the local cell is an NR-U cell, and/or requests the target network device of the cell type of the candidate target cell, for example, whether the candidate target cell is an NR-U cell. Optionally, the handover request message carries the information.

The candidate target network device performs HO decision to determine whether the UE can be accessed. If yes, the candidate target network device sends a switching request ACK to the source network device. Optionally, the candidate target network device notifies the source network device of the cell type information of the candidate target cell. For example, the handover request ACK message carries cell type information of the candidate target cell, such as whether the candidate target cell is an NR-U cell.

After the source network device sends an air interface switching command to the UE, or after the source network device sends the air interface switching command successfully, or after receiving an indication that the UE receives the switching command successfully, the source network device sends a specific indication message/information, such as a switching command sending confirmation message, to the target network device/candidate target network device, that is, the second information may be sent. The second information comprises at least one of the following: indicating the switching command sent by the source network equipment to the UE to be successfully sent to the target network equipment; indicating to the target network device that the source network device has sent the handover command; indicating a resource maintenance action/state reset to the target network device; indicating the restart of the first timer to the target network equipment; indicating the second duration to the target network device; indicating the UE to start a timer to the target network equipment; and indicating the UE to the target network equipment that the UE considers the relevant information of the target base station UE to be valid at the moment.

The second information, that is, the specific indication message/information, is used to ensure that the UE and the target network device understand whether valid of the UE-related information is consistent, or indicate to the target network device that the handover command sent by the source network device to the UE is successfully sent, or the source network device has sent the handover command, or indicate to the target network device that the resource maintenance behavior/status is reset, or indicate to the target network device that the timer maintains status restart.

The target network equipment can determine to start the first timer according to the indication that the switching command in the second information is successfully sent by sending the second information, because the UE side starts to execute the switching processing when receiving the switching command, the UE can start to determine the effective duration of the UE related information stored by the target network equipment side at this moment, and when the target network equipment is indicated by the second information, the moment when the target network equipment starts the first timer can be basically consistent with the moment when the target network equipment side starts the first timer understood by the UE, so that the effective duration of the UE related information stored by the target network equipment side can be consistent with the moment understood by the UE side. Or, the source network device indicates to the target network device that the handover command has been sent currently, at this time, the target network device side may start the first timer to determine the effective duration of the UE-related information, and the time when the target network device starts the first timer may also be made to be consistent with the time when the target network device side starts the first timer, which is determined by the UE side. Or, the start time of the first timer is indicated by indicating the restart of the first timer to the target network device, and the information may also be determined by referring to the time of successfully sending the handover command, for example, when the handover command is successfully sent, it may be understood that the UE considers that the first timer of the target network device side starts to be started, and at this time, the restart of the first timer is indicated to the target network device by the source network device, so that the time of restarting the first timer of the target network device side is consistent with the time of the UE side, thereby achieving the consistency of the effective duration of saving the UE related information understood by the UE side and the network side. Or, the resource maintenance behavior and/or the state reset may be further indicated to the target network device, that is, the resource maintenance behavior of the target network device is controlled to be processed based on the condition of sending the handover command or successfully sending the handover command, or the valid duration of saving the state of the UE-related information at the target network device side is reset according to the time of sending the handover command or successfully sending the handover command. In another case, the second duration is indicated to the target network device, where the second duration may be an effective duration understood by the source network device that the UE side considers that the target network device stores the UE-related information, and the second duration is indicated to the target network device, so that the target network device and the UE maintain the same effective duration.

Wherein the UE related information includes but is not limited to at least one of the following: UE context, reserved resource/configuration, RA resource, bearer corresponding configuration, QoS parameter, service pattern information

A disadvantage of the prior art is that it is possible that the network releases UE resources, while the UE also considers the current handover feasible, resulting in unnecessary delay and signaling overhead. The embodiment avoids the influence on the air interface and the UE, and realizes similar effects in a network side interaction mode.

Based on the foregoing various scenarios, the present embodiment may also provide the following further processing scenarios in combination with one or more of the foregoing scenarios. It should be noted that the following scenarios may also be used alone, that is, the following two processing scenarios may be performed without performing the processing provided by the foregoing embodiments, specifically as follows:

processing scenario 1,

Configuring non-contention based random access resources for the UE;

correspondingly, the UE executes the switching based on the switching command, and in the switching process, when a third preset condition is met, the UE backs from the random access based on the non-competition to the random access based on the competition;

wherein the third preset condition comprises at least one of:

non-contention based random access resource invalidation;

the non-contention based random access fails.

That is, in the handover procedure, when the UE fails in the non-Contention Based Random Access (CFRA) or when the CFRA resource is invalid, the UE falls back from the CFRA to the Contention Based Random Access (CBRA). At this time, the UE may or may not report the random access failure.

The specific processing flow is consistent with the detailed description of the processing scenario 1 provided in the foregoing embodiment, and is not described here again.

Processing scenario 2, may indicate multiple sets of non-contention random access resources for the UE.

The embodiment may further include: the method further comprises the following steps:

sending a switching command to the UE;

the handover command carries at least one set of random access resources based on non-contention, or the handover command carries at least one set of random access resources based on non-contention and the priority of each set of random access resources based on non-contention.

Wherein at least one of the following information of different non-contention based random access resources is different:

the effective resource initiation is different, the PRACH opportunity identification is different, the PRACH resource time domain/frequency domain position interval is different, the leader sequence parameter is different, and the leader sequence identification is different.

In this scenario, multiple sets of non-contention random access resources may be configured for the UE. At this time, the UE may perform processing through one of the sets of non-contention random access resources. At this time, if a failure occurs, a random access failure may be indicated to a higher layer. The UE may then select another set of non-contention random access resources again for access.

The processing scenario may include: multiple sets of non-contention random access resources may be configured for the UE. At this time, the UE may perform processing through at least one set of non-contention random access resources. At this time, when any one set of access fails, the random access failure may be indicated to the higher layer, or the random access failure may not be indicated to the higher layer. Alternatively, when all access fails, the random access failure may be indicated to the higher layer, or the random access failure may not be indicated to the higher layer

The specific processing flow is consistent with the detailed description of the processing scenario 2 provided in the foregoing embodiment, and is not described here again.

Since whether the network side releases the UE context and the resource configuration reserved for the UE at the same time is uncertain, there may be a problem that the CFRA resource not valid or the CFRA fails when UE related information such as the UE context is reserved. If the RA is directly considered to fail, or the re-establishment is triggered, or the SCG change failure execution is triggered according to the existing protocol, without returning to the CBRA process of the UE, the UE may access to the network delay, even the UE and the network communication may be delayed for a long time due to the MCOT missing time caused by the UE delayed access, which may cause the problems of the service QoS being reduced, the UE experience being deteriorated, and the like. This problem is solved by means of configuring/carrying at least one CFRA resource.

An embodiment of the present application provides a handover processing method, which is applied to a target network device, and as shown in fig. 13, the handover processing method includes:

step 51: receiving a switching request sent by source network equipment;

step 52: sending a switching request confirmation message to the source network equipment;

step 53: receiving second information sent by the source network equipment; the second information is used for assisting the target network equipment to determine the effective duration of the UE related information stored by the target network equipment, and the effective duration of the UE related information stored by the target network equipment determined by the UE is consistent with the effective duration of the UE related information stored by the target network equipment.

In this embodiment, the process may include:

After the source network device sends the air interface switching command to the UE, or after the air interface switching command is successfully sent, the source network device sends a specific indication message/information, such as a switching command sending confirmation message, to the target network device/candidate target network device, that is, may send the second information. The second information comprises at least one of the following:

the source network equipment sends a successful instruction to the switching command sent by the UE;

an indication that the source network device has sent a handover command;

an indication of resource maintenance behavior/state reset;

an indication of a first timer restart;

an indication of a second duration.

That is to say, the second information, that is, the specific indication message/information, is used to ensure that the UE and the target network device understand whether the UE-related information is valid or not, or indicate to the target network device that the handover command sent by the source network device to the UE is successfully sent, or the source network device has sent the handover command, or indicate to the target network device that the resource maintenance behavior/status is reset, or indicate to the target network device that the timer maintains status to be restarted.

That is to say, the first timer may be determined to be started by sending the second information, so that the target network device may determine to start the first timer according to an indication that the handover command in the second information is successfully sent, because the UE side may start to perform the handover processing only when receiving the handover command, at this time, the UE may start to determine an effective duration for the target network device side to store the UE-related information, and when the target network device is indicated by the second information, a time when the target network device starts the first timer may be substantially consistent with a time when the target network device side starts the first timer, which is understood by the UE, so that the effective duration for storing the UE-related information may be consistent with what the UE side understands at the target network device side. Or, the source network device indicates to the target network device that the handover command has been sent currently, at this time, the target network device side may start the first timer to determine the effective duration of the UE-related information, and the time when the target network device starts the first timer may also be made to be consistent with the time when the target network device side starts the first timer, which is determined by the UE side. Or, the start time of the first timer is indicated by indicating the restart of the first timer to the target network device, and the information may also be determined by referring to the time of successfully sending the handover command, for example, when the handover command is successfully sent, it may be understood that the UE considers that the first timer of the target network device side starts to be started, and at this time, the restart of the first timer is indicated to the target network device by the source network device, so that the time of restarting the first timer of the target network device side is consistent with the time of the UE side, thereby achieving the consistency of the effective duration of saving the UE related information understood by the UE side and the network side. Or, the resource maintenance behavior and/or the state reset may be further indicated to the target network device, that is, the resource maintenance behavior of the target network device is controlled to be processed based on the condition of sending the handover command or successfully sending the handover command, or the valid duration of saving the state of the UE-related information at the target network device side is reset according to the time of sending the handover command or successfully sending the handover command. In another case, the second duration is indicated to the target network device, where the second duration may be an effective duration understood by the source network device that the UE side considers that the target network device stores the UE-related information, and the second duration is indicated to the target network device, so that the target network device and the UE maintain the same effective duration.

processing scenario 1,

Configuring non-contention based random access resources for the UE; the random access resource may be configured for the UE by the target base station and then sent to the UE through the source network device.

The method further comprises the following steps:

transmitting at least one set of non-contention based random access resources, or,

and sending at least one set of non-contention based random access resources and the priority of each set of non-contention based random access resources to the source network device.

It should be understood that, in this embodiment, at least one set of non-contention based random access resources, or at least one set of non-contention based random access resources and their corresponding priorities, sent to the source network device are finally sent to the UE by the source network device.

Other specific processing flows are consistent with the detailed description of processing scenario 2 provided in the previous embodiment and are not described here in detail.

An embodiment of the present application provides a handover processing method, which is applied to a target network device, and as shown in fig. 14, the handover processing method includes:

step 61: sending the first information to the source network device;

In this embodiment, the target network device determines the first information and indicates the first information to the UE through the source network device. Specifically, the method comprises the following steps:

the method further comprises the following steps: and sending switching request confirmation information to the source network equipment, wherein the switching request confirmation information carries the first information.

It should be noted that the manner of determining the first information by the target network device may be to obtain an effective duration for itself to store the UE related information, and then determine a termination time for the effective storage of the UE related information based on the current time and the time of starting the first timer; or, the time when the source network device receives the handover request acknowledgement information is determined by combining the time difference information between the target network device and the source network device, the starting time of the first timer is determined, and the two parameters are both carried in the first information, so that the effective duration of the target network device for storing the UE-related information can be determined when the UE side receives the first information. In addition, the duration of the first timer is determined by the target network device itself, and therefore, the duration can be directly added to the first information.

the candidate target network device makes a handover decision to determine whether the UE can be accessed. If yes, the candidate target network device (i.e. one of the target network devices that the UE can access) sends a handover request acknowledgement to the source network device, and meanwhile, the message carries the first information; the first timer is configured to maintain an effective duration of the UE-related information stored on the candidate target network device side. It is noted that the first timer may be T304 on the network device side. The description of T304 is as described above and is not repeated here.

It is to be noted that, when the second preset condition is met, the first timer is started;

wherein the second preset condition comprises at least one of the following conditions:

the target network equipment sends switching request confirmation information; receiving a message which is sent by source network equipment and indicates to start a first timer; the second information is received.

The target network device may send the handover request acknowledgement information, when sending the handover request acknowledgement information, or at a first time after sending the handover acknowledgement information; the first time may be set according to practical situations, for example, may be 0.6ms, and the like, and is not limited herein.

The receiving of the message indicating to start the first timer sent by the source network device may be to start the first timer at a time when receiving the indication information for starting the first timer sent by the source network device, or may be to start the first timer at a second time after receiving the indication message for starting the first timer sent by the source network device. The second time may be set according to actual conditions, and may be set to 1ms, for example.

The receiving of the second information may be receiving second information sent by the source network device, where the second information is used to assist the target network device in determining that the effective duration of the UE-related information stored in the target network device is consistent with the effective duration of the UE-related information stored in the target network device determined by the UE. By receiving the second information, the source network device may be considered to have successfully sent the handover instruction, and the target network device may determine that the first timer needs to be started based on the indication of the second information.

Based on the foregoing processing flow, referring back to fig. 3, the method may further include:

the source network equipment sends a switching command to the UE;

and the UE receives a switching command sent by the source network equipment and executes a switching process according to the message of the switching command.

An embodiment of the present application provides a source network device, as shown in fig. 15, including:

a first communication unit 71 that transmits the first information to the user equipment UE;

the first communication unit 71 receives handover request acknowledgement information sent by the candidate target network device, where the handover request acknowledgement information carries the first information.

It should be noted that the source network device may further include: the first processing unit 72 may instruct the target network device to start a first timer when a first preset condition is met;

receiving switching request confirmation information; sending a switching command; the handover command is successfully sent.

The receiving of the switching request confirmation information may be when the switching request confirmation information is received or when a first preset time length is reached after the switching confirmation information is received; the first preset time period may be set according to practical situations, for example, may be 0.5ms, and the like, and is not limited herein.

When the switching command is successfully sent, the switching command can be understood as the time when the switching command is successfully sent, or the switching command can be understood as the time when the switching command is successfully sent for a third preset time length; the third preset time length can also be set according to the actual situation and is not limited any more; the switching command is successfully sent, or the switching command can be understood as the time when the switching command successfully received indication sent by the UE is received, or the switching command can be understood as the time when the seventh preset time length after the switching command successfully received indication sent by the UE is received; the seventh preset time period can also be set according to actual conditions and is not limited. The lengths of the first preset time period, the second preset time period, the third preset time period and the seventh preset time period may be the same or different, or may be partially the same.

The first processing unit 72 generates first information.

The first communication unit 71, further performs one of:

carrying first information in a handover command;

the first information is carried in an RRC message.

sub-processing scenarios 1,

The first processing unit 71 determines an updated parameter of the first timer according to at least one of the following information, and the first communication unit sends the updated parameter of the first timer to the UE:

Sub-scenario 2,

The first information further includes:

a second duration; wherein the second duration is different from the duration in the parameter of the first timer;

Wherein the first processing unit 72 determines the parameter of the second duration based on at least one of the following information:

An embodiment of the present application provides a UE, as shown in fig. 16, including:

a second communication unit 81 for receiving the first information sent from the source network device;

Further, the UE may further include: the second processing unit 82, based on the valid duration of the UE related information saved by the target network device, executes at least one of the following operations when determining that the UE related information saved by the target network device is invalid:

That is, when the UE-related information valid is determined, for example, the timer has not timed out or an expiration time point at which the UE-related information effectively remains, the UE performs a handover procedure, or an RA procedure in handover. Otherwise, the handover is considered to be failed, and/or the UE performs an RRC connection re-establishment procedure (MCG handover) or indicates an SCG failure information procedure to the network.

The method further comprises one of:

At this time, the second processing unit 82, may determine the following information: resources reserved by the target network device;

the time when the first timer of the target network equipment is started;

resources reserved by the target network device;

the time when the first timer of the target network equipment is started;

sub-processing scenarios 1,

The first information further includes: an updated first timer.

Alternatively, the second communication unit 81 may: receiving the parameter sent by the source network device for modifying the first timer, the second processing unit 82 updates the first timer based on the parameter for modifying the first timer.

Sub-scenario 2,

The first information further includes: a second duration; wherein the second duration is different from the duration in the parameter of the first timer.

The second duration is different from a duration of the first timer.

In this scenario, similarly, the second processing unit 82 may determine the second duration by itself according to the information sent by the source network device.

processing scenario 1,

A second processing unit 82, configured to execute handover based on the handover command, and when a third preset condition is met during handover, back-off from non-contention based random access to contention based random access;

wherein the third preset condition comprises at least one of:

non-contention based random access resource invalidation;

the non-contention based random access fails.

The second processing unit 82 may indicate the random access failure to the higher layer through the second communication unit 81 when the non-contention based random access fails.

Processing scenario 2, the second processing unit, performing one of:

Specifically, in this scenario, multiple sets of non-contention random access resources configured for the UE may be acquired through the second communication unit. At this time, the second processing unit controls to perform processing through one set of non-contention random access resources. At this time, if a failure occurs, the second communication unit may indicate a random access failure to a higher layer. Another set of non-contention random access resources may then be selected again for access.

The processing scenario may include: multiple sets of non-contention random access resources may be configured for the UE. At this time, the second processing unit 82 controls to perform processing through at least one set of non-contention random access resources. At this time, when any one set of access fails, the random access failure may be indicated to the higher layer, or the random access failure may not be indicated to the higher layer. Or, when all access fails, random access failure may be indicated to the higher layer, or random access failure may not be indicated to the higher layer

In addition, the processing scenario may include: the second processing unit 82, when determining that the processing of the first non-contention based random access resource fails, does not indicate a random access failure to the upper layer if there is any non-contention based random access resource other than the first non-contention based random access resource.

An embodiment of the present application provides a source network device, as shown in fig. 17, including:

a third processing unit 91 that selects a handover target network device;

a third communication unit 92 that transmits a handover request to the target network device; receiving switching request confirmation information fed back by target network equipment; sending second information to the target network equipment; the second information is used for assisting the target network equipment to determine the effective duration of the UE related information stored by the target network equipment, and the effective duration of the UE related information stored by the target network equipment determined by the UE is consistent with the effective duration of the UE related information stored by the target network equipment.

Before sending the second information to the target network device, the third processing unit 91 sends a handover command to the UE; alternatively, a handover command is successfully sent to the UE, or an indication that the handover command was successfully received by the UE is received.

Wherein, sending the handover command to the UE may be understood as sending the handover command to the UE for the first time by the source network device; in addition, the sending of the second information may be when a fifth preset time length after the first sending of the handover command is reached; of course, if the source network device can send the handover command multiple times, it can also be understood that the handover command is sent for the second time, or for the third time, which is not exhaustive here. The successful sending of the switching command to the UE may be considered as successful sending of the switching command when receiving the confirmation information fed back by the UE, and in addition, the timing of sending the second information may be a time when the successful sending of the switching command is confirmed, or may be a time when a sixth preset time length after the successful sending of the switching command is confirmed. The fifth preset time period may be the same as or different from the sixth preset time period. In yet another case, the second information can be transmitted upon receiving an indication of successful reception of the handover command by the UE; here, it may be specifically configured that the second information is determined to be sent at the time when the instruction of successful reception of the handover command is received, or the second information is sent after a period of time after the instruction of successful reception of the handover command is received; the duration here can be set according to actual conditions, and is not exhaustive.

processing scenario 1,

A third communication unit 92, configured to configure a non-contention based random access resource for the UE.

The detailed description of the processing scenario is provided above and will not be repeated here.

Processing scenario 2,

A third communication unit 92 that transmits a handover command to the UE;

An embodiment of the present application provides a target network device, as shown in fig. 18, including:

a fourth communication unit 1001 configured to receive a handover request sent by a source network device; sending a switching request confirmation message to the source network equipment; receiving second information sent by the source network equipment; the second information is used for assisting the target network equipment to determine the effective duration of the UE related information stored by the target network equipment, and the effective duration of the UE related information stored by the target network equipment determined by the UE is consistent with the effective duration of the UE related information stored by the target network equipment.

Before sending the second information to the target network device, the fourth communication unit 1001 sends a handover command to the UE; or, a handover command is successfully sent to the UE. Wherein, sending the handover command to the UE may be understood as sending the handover command to the UE for the first time by the source network device; in addition, the sending of the second information may be when a fifth preset time length after the first sending of the handover command is reached; of course, if the source network device can send the handover command multiple times, it can also be understood that the handover command is sent for the second time, or for the third time, which is not exhaustive here. The successful sending of the switching command to the UE may be considered as successful sending of the switching command when receiving the confirmation information fed back by the UE, and in addition, the timing of sending the second information may be a time when the successful sending of the switching command is confirmed, or may be a time when a sixth preset time length after the successful sending of the switching command is confirmed. The fifth preset time period may be the same as or different from the sixth preset time period.

The second information comprises at least one of the following:

an indication that the source network device has sent a handover command;

an indication of resource maintenance behavior/state reset;

an indication of a first timer restart;

an indication of a second duration.

processing scenario 1,

A fourth communication unit 1001 configured to configure a non-contention based random access resource for the UE;

wherein the third preset condition comprises at least one of:

non-contention based random access resource invalidation;

the non-contention based random access fails.

The embodiment may further include: the fourth communication unit 1001 sends a handover command to the UE;

In this scenario, multiple sets of non-contention random access resources may be configured for the UE. At this time, the UE may perform processing through one of the sets of non-contention random access resources. At this time, if a failure occurs, a random access failure may be indicated to a higher layer. The UE may then select another set of non-contention random access resources again for access. That is, at this time, the third communication unit may further receive information of access failure based on a certain set of non-contention random access resources sent by the UE.

Since whether the network side releases the UE context and the resource configuration reserved for the UE at the same time is uncertain, there may be a problem that the CFRA resource not valid or the CFRA fails when UE related information such as the UE context is reserved. If the RA is directly considered to fail, or the re-establishment is triggered, or the SCG change failure execution is triggered according to the existing protocol, without going back to the CBRA process of the UE, the UE may access to the network delay, even the UE and the network communication may be delayed for a long time due to the MCOT missing time caused by the UE delayed access, which may cause the problems of the service QoS being reduced, the UE experience being deteriorated, and the like. This problem is solved by means of configuring/carrying at least one CFRA resource.

An embodiment of the present application provides a target network device, as shown in fig. 19, including:

a fifth communication unit 1101 that transmits the first information to the source network device;

the fifth communication unit 1101 is configured to send a switching request acknowledgement message to the source network device, where the switching request acknowledgement message carries the first information.

It is noted that the target network device further includes:

a fifth processing unit 1102, configured to start a first timer when a second preset condition is met;

processing scenario 1,

The fifth communication unit 1101 configures a non-contention based random access resource for the UE; the random access resource may be configured for the UE by the target base station and then sent to the UE through the source network device.

The method further comprises the following steps:

and sending at least one set of non-contention based random access resources and the priority of each set of non-contention based random access resources to the source network equipment.

Other specific processing flows are consistent with the detailed description of the processing scenario 2 provided in the foregoing embodiment, and are not described again here.

Fig. 20 is a schematic structural diagram of a communication device 1200 according to an embodiment of the present application, where the communication device may be the foregoing UE or network device according to this embodiment. The communication device 1200 shown in fig. 20 includes a processor 1210, and the processor 610 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 20, the communication device 1200 may further include a memory 1220. From the memory 1220, the processor 1210 may call and execute a computer program to implement the method in the embodiment of the present application.

The memory 1220 may be a separate device from the processor 1210, or may be integrated into the processor 610.

Optionally, as shown in fig. 20, the communication device 1200 may further include a transceiver 1230, and the processor 1210 may control the transceiver 1230 to communicate with other devices, and in particular, may transmit information or data to other devices or receive information or data transmitted by other devices.

Optionally, the communication device 1200 may specifically be a UE or a network device in the embodiment of the present application, and the communication device 1200 may implement a corresponding procedure implemented by a mobile terminal/UE in each method in the embodiment of the present application, which is not described herein again for brevity.

Fig. 21 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 1300 shown in fig. 21 includes a processor 1310, and the processor 1310 may call and execute a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 21, the chip 1300 may further include a memory 1320. From the memory 1320, the processor 1310 may call and execute a computer program to implement the method of the present embodiment.

The memory 1320 may be a separate device from the processor 1310, or may be integrated into the processor 1310.

Optionally, the chip 1300 may further include an input interface 1330 and an output interface 1340.

Optionally, the chip may be applied to the network device or the UE in the embodiment of the present application, and the chip may implement a corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, no further description is given here.

Fig. 22 is a schematic block diagram of a communication system 1400 provided in an embodiment of the present application. As shown in fig. 22, the communication system 1400 includes a UE1410 and a network device 1420.

The UE1410 may be configured to implement corresponding functions implemented by the UE in the foregoing method, and the network device 1420 may be configured to implement corresponding functions implemented by the network device in the foregoing method, which is not described herein for brevity.

It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memories are exemplary but not limiting illustrations, for example, the memories in the embodiments of the present application may also be Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM, ESDRAM), Synchronous Link DRAM (SLDRAM), Direct Rambus RAM (DR RAM), and the like. That is, the memory in the embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

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

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

Optionally, the computer-readable storage medium may be applied to the UE in the embodiment of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/UE in the methods in the embodiment of the present application, which are not described herein again for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions enable the computer to execute corresponding processes implemented by the network device in the methods in the embodiment of the present application, which are not described herein again for brevity.

Optionally, the computer program product may be applied to the mobile terminal/UE in the embodiment of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal/UE in the methods of the embodiments of the present application, which are not described herein again for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to the network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the computer program may be applied to the mobile terminal/UE in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute a corresponding process implemented by the mobile terminal/UE in each method in the embodiment of the present application, which is not described herein again for brevity.

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

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

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

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

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A switching processing method is applied to source network equipment and comprises the following steps:

sending the first information to User Equipment (UE);

the first information is at least used for assisting the UE to determine that the effective duration of the UE related information of the UE side is consistent with that of the network side, or used for determining the effective duration of the UE related information.
The method of claim 1, wherein the method further comprises:

and receiving switching request confirmation information sent by target network equipment, wherein the switching request confirmation information carries the first information.
The method of claim 1 or 2, wherein the first information comprises at least one of:

the time period of the effective retention of the UE related information, the time difference information between the target network equipment and the source network equipment, the starting time of the first timer and the duration of the first timer.
The method of claim 3, wherein the UE-related information includes, but is not limited to, at least one of: context content of the UE, reserved resources/configurations, random access RA resources, bearer corresponding configurations, quality of service, QoS, parameters, service type information.
The method of claim 3, wherein the first timer is configured to maintain a validity duration of the UE-related information stored in the candidate target network device.
The method of claim 5, wherein the method further comprises:

when a first preset condition is met, indicating the target network equipment to start a first timer;

wherein, the first preset condition comprises at least one of the following conditions:

receiving switching request confirmation information; sending a switching command; the handover command is successfully sent.
The method of claim 1, wherein the method further comprises:

first information is generated.
The method of claim 7, wherein the first information comprises:

the time of the delay of the issuing of the switching command, or the number of times of the failure of the issuing of the switching command.
The method of claim 8, wherein the first information further comprises at least one of:

resources reserved by the target network device;

at least one of the actual effective time, the effective duration and the deadline of the UE context;

at least one of the actual effective time, the effective duration and the deadline of the configuration information contained in the switching command;

the time when the first timer of the target network equipment is started;

the target network equipment maintains the starting time of the UE related information;

the target network equipment maintains the deadline of the UE related information;

the running time of the first timer of the target network equipment when the switching command is sent;

the time length that the target network device already holds the UE related information when sending the switching command;

and the remaining effective duration of the UE related information in the target network equipment when the switching command is sent.
The method according to any one of claims 7-9, wherein the method further comprises one of:

carrying first information in a handover command;

the first information is carried in an RRC message.
The method of claim 7, wherein the method further comprises:

determining the updated parameter of the first timer according to at least one of the following information, and sending the updated parameter of the first timer to the UE:

the parameters of the original first timer, the time of issuing delay of the switching command, the times of issuing failure of the switching command, the time of starting the first timer by the network, the deadline time of effective retention of UE related information, the time period of effective retention of the UE related information, the time difference information of the target network equipment and the source network equipment, and the time length of the original first timer.
The method of claim 7, wherein the first information further comprises:

a second duration;

the second duration is used for indicating the effective duration of the target network equipment for reserving the UE related information for the UE, or the second duration is used for enabling the effective duration of the UE and the effective duration of the network reserved UE related information to be consistent.
The method of claim 12, wherein the method further comprises:

determining a parameter of the second duration based on at least one of:

parameters of a first timer, time of issuing delay of a switching command, times of issuing failure of the switching command, time of starting the first timer by a network, deadline time of effective retention of UE (user equipment) related information, time period of effective retention of the UE related information, time difference information of target network equipment and source network equipment, and duration of the first timer.
A switching processing method is applied to User Equipment (UE), and comprises the following steps:

receiving first information sent by source network equipment;

the first information is at least used for assisting the UE to determine that the effective duration of the UE related information of the UE side is consistent with that of the network side, or used for determining the effective duration of the UE related information.
The method of claim 14, wherein the first information comprises at least one of:

the method comprises the steps of effectively reserving termination time of UE related information, effectively reserving time periods of the UE related information, time difference information of target network equipment and source network equipment, starting time of a first timer on a network equipment side and duration of the first timer.
The method of claim 15, wherein the UE-related information includes, but is not limited to, at least one of: context content of the UE, reserved resources/configurations, RA resources, bearer corresponding configurations, QoS parameters, service type information.
The method of claim 14, wherein the method further comprises:

and determining the effective storage duration for storing the UE related information by the target network equipment side based on the first information.
The method of claim 17, wherein the method further comprises:

and executing switching processing or random access processing in the switching process when the UE related information stored by the target network equipment side is determined to be valid based on the valid duration of the UE related information stored by the target network equipment side.
The method of claim 18, wherein the method further comprises:

and based on the effective duration of the UE related information saved by the target network equipment side, when the UE related information saved by the target network equipment side is determined to be invalid, executing at least one of the following steps:

confirming a handover failure;

performing an RRC connection reestablishment procedure;

the SCG failure information procedure is indicated to the network.
The method according to any one of claims 14, 18 and 19, wherein the first information comprises:

the time of the delay of the issuing of the switching command, or the number of times of the failure of the issuing of the switching command.
The method of claim 20, wherein the method further comprises:

based on the first information, determining at least one of:

resources reserved by the target network device;

at least one of the actual effective time, the effective duration and the deadline of the UE context;

at least one of the actual effective time, the effective duration and the deadline of the configuration information contained in the switching command;

the time when the first timer of the target network equipment is started;

the target network equipment maintains the starting time of the UE related information;

the target network equipment maintains the deadline of the UE related information;

receiving the running time length of a target network equipment timer when a switching command is received;

receiving the time length that the target network equipment has the UE related information when the switching command is received;

and receiving the residual effective duration of the UE related information in the target network equipment when the switching command is received.
The method of claim 20, wherein the first information further comprises at least one of:

resources reserved by the target network device;

at least one of the actual effective time, the effective duration and the deadline of the UE context;

at least one of the actual effective time, the effective duration and the deadline of the configuration information contained in the switching command;

the time when the first timer of the target network equipment is started;

the target network equipment maintains the starting time of the UE related information;

the target network equipment maintains the deadline of the UE related information;

the running time of the target network equipment timer when the source network equipment sends the switching command;

the time length that the target network equipment has kept the UE related information when the source network equipment sends the switching command;

and when the source network equipment sends the switching command, the residual effective duration of the UE related information in the target network equipment.
The method according to any one of claims 20-22, wherein the method further comprises one of:

acquiring first information carried by the switching command through the switching command;

and acquiring the first information carried by the RRC message.
The method of any of claims 15, 20-22, wherein the method further comprises:

a second duration is determined.
The method of claim 24, wherein the method further comprises:

determining a parameter of the second duration based on at least one of:

parameters of a first timer, time of issuing delay of a switching command, times of issuing failure of the switching command, time of starting the first timer by a network, deadline time of effective retention of UE (user equipment) related information, time period of effective retention of the UE related information, time difference information of target network equipment and source network equipment, and duration of the first timer.
The method of any one of claims 20-22, wherein the first information further comprises:

the updated parameter of the first timer, or the second duration;

wherein the second duration is different from the duration in the parameter of the first timer.
The method of claim 14, wherein the method further comprises:

receiving a switching command sent by source network equipment;

executing switching based on the switching command, and backing back to random access based on non-competition to random access based on competition when a third preset condition is met in the switching process;

wherein the third preset condition comprises at least one of:

non-contention based random access resource invalidation;

the non-contention based random access fails.
The method of claim 27, wherein the method further comprises: when the non-contention based random access fails, the random access failure is not indicated to a higher layer.
The method of claim 14, wherein the method further comprises one of:

processing based on at least one set of non-competing random access resources in the plurality of sets of non-competing random access resources; when the processing based on at least one set of non-contention based random access resources fails, not indicating the random access failure to the higher layer;

processing based on at least one set of non-competing random access resources in the plurality of sets of non-competing random access resources; when the processing based on at least one set of non-contention based random access resources fails, indicating the random access failure to a higher layer;

processing based on a first non-contention based random access resource of the plurality of sets of non-contention based random access resources; when the processing of a first non-contention based random access resource is judged to fail, if other non-contention based random access resources except the first non-contention based random access resource exist, the random access failure is not indicated to a high layer;

processing based on a first non-contention based random access resource of the plurality of sets of non-contention based random access resources; when the processing of the first non-contention based random access resource is judged to fail, if other non-contention based random access resources except the first non-contention based random access resource exist, the random access failure is indicated to a high layer.
A switching processing method is applied to source network equipment and comprises the following steps:

selecting a switching target network device and sending a switching request to the target network device;

receiving switching request confirmation information fed back by target network equipment;

sending second information to the target network equipment; the second information is used for assisting the target network equipment to determine the effective duration of the UE related information stored by the target network equipment, and the effective duration of the UE related information stored by the target network equipment determined by the UE is consistent with the effective duration of the UE related information stored by the target network equipment.
The method of claim 30, wherein prior to sending the second information to the target network device, the method further comprises:

sending a switching command to the UE;

or, successfully sending a handover command to the UE;

alternatively, an indication is received that the handover command was successfully received by the UE.
The method of claim 30, wherein the second information comprises at least one of:

indicating the switching command sent by the source network equipment to the UE to be successfully sent to the target network equipment;

indicating to the target network device that the source network device has sent the handover command;

indicating a resource maintenance action/state reset to the target network device;

indicating the restart of the first timer to the target network equipment;

indicating the second duration to the target network device.
The method of claim 30, wherein the UE-related information includes, but is not limited to, at least one of: context content of the UE, reserved resources/configurations, RA resources, bearer corresponding configurations, QoS parameters, service type information.
The method of claim 30, wherein the method further comprises:

sending a switching command to the UE;

the handover command carries at least one set of random access resources based on non-contention, or the handover command carries at least one set of random access resources based on non-contention and the priority of each set of random access resources based on non-contention.
The method of claim 34, wherein different non-contention based random access resources differ in at least one of:

the effective resource initiation is different, the PRACH opportunity identification is different, the PRACH resource time domain/frequency domain position interval is different, the leader sequence parameter is different, and the leader sequence identification is different.
A switching processing method is applied to target network equipment and comprises the following steps:

receiving a switching request sent by source network equipment;

sending a switching request confirmation message to the source network equipment;

receiving second information sent by the source network equipment; the second information is used for assisting the target network equipment to determine the effective duration of the UE related information stored by the target network equipment, and the effective duration of the UE related information stored by the target network equipment determined by the UE is consistent with the effective duration of the UE related information stored by the target network equipment.
The method of claim 36, wherein the second information comprises at least one of:

the source network equipment sends a successful instruction to the switching command sent by the UE;

an indication that the source network device has sent a handover command;

an indication of resource maintenance behavior/state reset;

an indication of a first timer restart;

an indication of a second duration.
The method of claim 36, wherein the UE-related information includes, but is not limited to, at least one of: context content of the UE, reserved resources/configurations, RA resources, bearer corresponding configurations, QoS parameters, service type information.
The method of claim 36, wherein the method further comprises:

transmitting at least one set of non-contention based random access resources, or,

and sending at least one set of non-contention based random access resources and the priority of each set of non-contention based random access resources to the source network device.
A source network device, comprising:

the first communication unit is used for sending the first information to User Equipment (UE);

the first information is at least used for assisting the UE to determine that the effective duration of the UE related information of the UE side is consistent with that of the network side, or used for determining the effective duration of the UE related information.
The source network device of claim 40, wherein the first communication unit receives a handover request acknowledgement message sent by a target network device, and the handover request acknowledgement message carries the first information.
The source network device of claim 40 or 41, wherein the first information comprises at least one of:

the time period of the effective retention of the UE related information, the time difference information between the target network equipment and the source network equipment, the starting time of the first timer and the duration of the first timer.
The source network device of claim 42, wherein the UE-related information includes, but is not limited to, at least one of: context content of the UE, reserved resources/configurations, random access RA resources, bearer corresponding configurations, quality of service, QoS, parameters, service type information.
The source network device of claim 42, wherein the first timer is configured to maintain a validity duration for saving the UE-related information on the candidate target network device side.
The source network device of claim 44, wherein the first communication unit,

when a first preset condition is met, indicating the target network equipment to start a first timer;

wherein, the first preset condition comprises at least one of the following conditions:

receiving switching request confirmation information; sending a switching command; the handover command is successfully sent.
The source network device of claim 40, wherein the source network device further comprises:

the first processing unit generates first information.
The source network device of claim 46, wherein the first information comprises:

the time of the delay of the issuing of the switching command, or the number of times of the failure of the issuing of the switching command.
The source network device of claim 47, wherein the first information further comprises at least one of:

resources reserved by the target network device;

at least one of the actual effective time, the effective duration and the deadline of the UE context;

at least one of the actual effective time, the effective duration and the deadline of the configuration information contained in the switching command;

the time when the first timer of the target network equipment is started;

the target network equipment maintains the starting time of the UE related information;

the target network equipment maintains the deadline of the UE related information;

the running time of the first timer of the target network equipment when the switching command is sent;

the time length that the target network device already holds the UE related information when sending the switching command;

and the remaining effective duration of the UE related information in the target network equipment when the switching command is sent.
The source network device of any of claims 46-48, wherein the first processing unit is to perform one of:

carrying first information in a handover command;

the first information is carried in an RRC message.
The source network device of claim 49, wherein the first processing unit is to determine the updated parameter of the first timer based on at least one of: the parameters of the original first timer, the time of issuing delay of the switching command, the times of issuing failure of the switching command, the time of starting the first timer by the network, the effective retention deadline of the UE related information, the effective retention time period of the UE related information, the time difference information of the target network equipment and the source network equipment, and the time length of the original first timer;

and the first communication unit is used for sending the updated parameter of the first timer to the UE.
The source network device of claim 46, wherein the first information further comprises:

a second duration;

the second duration is used for indicating the effective duration of the target network equipment for reserving the UE related information for the UE, or the second duration is used for enabling the effective duration of the UE and the effective duration of the network reserved UE related information to be consistent.
The source network device of claim 51, wherein the first processing unit is configured to determine the parameter for the second duration based on at least one of:

parameters of a first timer, time of issuing delay of a switching command, times of issuing failure of the switching command, time of starting the first timer by a network, deadline time of effective retention of UE (user equipment) related information, time period of effective retention of the UE related information, time difference information of target network equipment and source network equipment, and duration of the first timer.
A UE, comprising:

the second communication unit is used for receiving the first information sent by the source network equipment;

the first information is at least used for assisting the UE to determine that the effective duration of the UE related information of the UE side is consistent with that of the network side, or used for determining the effective duration of the UE related information.
The UE of claim 53, wherein the first information comprises at least one of:

the method comprises the steps of effectively reserving termination time of UE related information, effectively reserving time periods of the UE related information, time difference information of target network equipment and source network equipment, starting time of a first timer on a network equipment side and duration of the first timer.
The UE of claim 54, wherein the UE-related information includes, but is not limited to, at least one of: context content of the UE, reserved resources/configurations, RA resources, bearer corresponding configurations, QoS parameters, service type information.
The UE of claim 53, wherein the UE further comprises:

and the second processing unit is used for determining the effective storage time length for storing the UE related information by the target network equipment side based on the first information.
The UE of claim 56, wherein the second processing unit, based on an effective duration of the UE related information saved by the target network device, determines that the UE related information saved by the target network device is valid, and executes a handover process or a random access process in a handover process.
The UE of claim 57, wherein the second processing unit, when determining that the UE related information stored on the target network device side is invalid based on a valid duration of the UE related information stored on the target network device side, performs at least one of:

confirming a handover failure;

performing an RRC connection reestablishment procedure;

the SCG failure information procedure is indicated to the network.
The UE of any of claims 54, 57, and 58, wherein the first information comprises:

the time of the delay of the issuing of the switching command, or the number of times of the failure of the issuing of the switching command.
The UE of claim 59, wherein the second processing unit, based on the first information, determines at least one of:

resources reserved by the target network device;

at least one of the actual effective time, the effective duration and the deadline of the UE context;

at least one of the actual effective time, the effective duration and the deadline of the configuration information contained in the switching command;

the time when the first timer of the target network equipment is started;

the target network equipment maintains the starting time of the UE related information;

the target network equipment maintains the deadline of the UE related information;

receiving the running time length of a target network equipment timer when a switching command is received;

receiving the time length that the target network equipment has the UE related information when the switching command is received;

and receiving the residual effective duration of the UE related information in the target network equipment when the switching command is received.
The UE of claim 59, wherein the first information further comprises at least one of:

resources reserved by the target network device;

at least one of the actual effective time, the effective duration and the deadline of the UE context;

at least one of the actual effective time, the effective duration and the deadline of the configuration information contained in the switching command;

the time when the first timer of the target network equipment is started;

the target network equipment maintains the starting time of the UE related information;

the target network equipment maintains the deadline of the UE related information;

the running time of the target network equipment timer when the source network equipment sends the switching command;

the time length that the target network equipment has kept the UE related information when the source network equipment sends the switching command;

and when the source network equipment sends the switching command, the residual effective duration of the UE related information in the target network equipment.
The UE of any one of claims 59-61, wherein the second processing unit is to perform one of:

acquiring first information carried by the switching command through the switching command;

and acquiring the first information carried by the RRC message.
The UE of any one of claims 54, 59-61, wherein the second processing unit is to determine the second duration.
The UE of claim 63, wherein the second processing unit is configured to determine the parameter for the second duration based on at least one of:

parameters of a first timer, time of issuing delay of a switching command, times of issuing failure of the switching command, time of starting the first timer by a network, deadline time of effective retention of UE (user equipment) related information, time period of effective retention of the UE related information, time difference information of target network equipment and source network equipment, and duration of the first timer.
The UE of any one of claims 59-61, wherein the first information further comprises:

the updated parameter of the first timer, or the second duration;

wherein the second duration is different from the duration in the parameter of the first timer.
The UE of claim 54, wherein the second communication unit receives a handover command from a source network device;

the second processing unit executes the switching based on the switching command, and backs to the random access based on the non-competition to the random access based on the competition when a third preset condition is met in the switching process;

wherein the third preset condition comprises at least one of:

non-contention based random access resource invalidation;

the non-contention based random access fails.
The UE of claim 66, wherein the second processing unit, when the non-contention based random access fails, does not indicate the random access failure to a higher layer.
The UE of claim 54, wherein the second processing unit,

performing one of:

processing based on at least one set of non-competing random access resources in the plurality of sets of non-competing random access resources; when the processing based on at least one set of non-contention based random access resources fails, not indicating the random access failure to the higher layer;

processing based on at least one set of non-competing random access resources in the plurality of sets of non-competing random access resources; when the processing based on at least one set of non-contention based random access resources fails, indicating the random access failure to a higher layer;

processing based on a first non-contention based random access resource of the plurality of sets of non-contention based random access resources; when the processing of a first non-contention based random access resource is judged to fail, if other non-contention based random access resources except the first non-contention based random access resource exist, the random access failure is not indicated to a high layer;

processing based on a first non-contention based random access resource of the plurality of sets of non-contention based random access resources; when the processing of the first non-contention based random access resource is judged to fail, if other non-contention based random access resources except the first non-contention based random access resource exist, the random access failure is indicated to a high layer.
A source network device, comprising:

a third processing unit that selects a handover target network device;

a third communication unit that transmits a handover request to the target network device; receiving switching request confirmation information fed back by target network equipment; sending second information to the target network equipment; the second information is used for assisting the target network equipment to determine the effective duration of the UE related information stored by the target network equipment, and the effective duration of the UE related information stored by the target network equipment determined by the UE is consistent with the effective duration of the UE related information stored by the target network equipment.
The source network device of claim 69, wherein the third communication unit is configured to send a handover command to the UE;

or, successfully sending a handover command to the UE;

alternatively, an indication is received that the handover command was successfully received by the UE.
The source network device of claim 69, wherein the second information includes at least one of:

indicating the switching command sent by the source network equipment to the UE to be successfully sent to the target network equipment;

indicating to the target network device that the source network device has sent the handover command;

indicating a resource maintenance action/state reset to the target network device;

indicating the restart of the first timer to the target network equipment;

indicating the second duration to the target network device.
The source network device of claim 69, wherein the UE-related information includes, but is not limited to, at least one of: context content of the UE, reserved resources/configurations, RA resources, bearer corresponding configurations, QoS parameters, service type information.
The source network device of claim 69, wherein the third communication unit is configured to send a handover command to the UE;

the handover command carries at least one set of random access resources based on non-contention, or the handover command carries at least one set of random access resources based on non-contention and the priority of each set of random access resources based on non-contention.
The source network device of claim 73, wherein different non-contention based random access resources differ in at least one of:

the effective resource initiation is different, the PRACH opportunity identification is different, the PRACH resource time domain/frequency domain position interval is different, the leader sequence parameter is different, and the leader sequence identification is different.
A target network device, comprising:

the fourth communication unit receives a switching request sent by the source network equipment;

sending a switching request confirmation message to the source network equipment;

receiving second information sent by the source network equipment; the second information is used for assisting the target network equipment to determine the effective duration of the UE related information stored by the target network equipment, and the effective duration of the UE related information stored by the target network equipment determined by the UE is consistent with the effective duration of the UE related information stored by the target network equipment.
The target network device of claim 75, wherein the second information comprises at least one of:

the source network equipment sends a successful instruction to the switching command sent by the UE;

an indication that the source network device has sent a handover command;

an indication of resource maintenance behavior/state reset;

an indication of a first timer restart;

an indication of a second duration.
The target network device of claim 75, wherein the UE-related information includes, but is not limited to, at least one of: context content of the UE, reserved resources/configurations, RA resources, bearer corresponding configurations, QoS parameters, service type information.
The target network device of claim 75, wherein the fourth communication unit,

transmitting at least one set of non-contention based random access resources, or,

and sending at least one set of non-contention based random access resources and the priority of each set of non-contention based random access resources to the source network device.
A switching processing method is applied to target network equipment and comprises the following steps:

sending the first information to the source network device;

the first information is at least used for assisting the UE to determine that the effective duration of the UE related information of the UE side is consistent with that of the network side, or used for determining the effective duration of the UE related information.
The method of claim 79, wherein the method further comprises:

and sending switching request confirmation information to the source network equipment, wherein the switching request confirmation information carries the first information.
The method of claim 79 or 80, wherein the first information comprises at least one of:

the time period of the effective retention of the UE related information, the time difference information between the target network equipment and the source network equipment, the starting time of the first timer and the duration of the first timer.
The method of claim 81, wherein the UE-related information includes, but is not limited to, at least one of: context content of the UE, reserved resources/configurations, random access RA resources, bearer corresponding configurations, quality of service, QoS, parameters, service type information.
The method of claim 81, wherein the first timer is configured to maintain a validity duration of the UE related information stored at the candidate target network device.
The method of claim 83, wherein the method further comprises:

when a second preset condition is met, starting a first timer;

wherein the second preset condition comprises at least one of the following conditions:

the target network equipment sends switching request confirmation information; receiving a message which is sent by source network equipment and indicates to start a first timer; the second information is received.
The method of claim 79, wherein the method further comprises:

transmitting at least one set of non-contention based random access resources, or,

and sending at least one set of non-contention based random access resources and the priority of each set of non-contention based random access resources to the source network device.
A target network device, comprising:

the fifth communication unit is used for sending the first information to the source network equipment;

the first information is at least used for assisting the UE to determine that the effective duration of the UE related information of the UE side is consistent with that of the network side, or used for determining the effective duration of the UE related information.
The target network device of claim 86, wherein the fifth communication unit sends handover request acknowledgement information to a source network device, and the handover request acknowledgement information carries the first information.
The target network device of claim 86 or 87, wherein the first information comprises at least one of:

the time period of the effective retention of the UE related information, the time difference information between the target network equipment and the source network equipment, the starting time of the first timer and the duration of the first timer.
The target network device of claim 88, wherein the UE-related information includes, but is not limited to, at least one of: context content of the UE, reserved resources/configurations, random access RA resources, bearer corresponding configurations, quality of service, QoS, parameters, service type information.
The target network device of claim 88, wherein the first timer is configured to maintain a validity duration for saving the UE-related information on the candidate target network device side.
The target network device of claim 90, wherein the target network device further comprises:

the fifth processing unit starts the first timer when meeting a second preset condition;

wherein the second preset condition comprises at least one of the following conditions:

the target network equipment sends switching request confirmation information; receiving a message which is sent by source network equipment and indicates to start a first timer; the second information is received.
The target network device of claim 86, wherein the fifth communication unit,

transmitting at least one set of non-contention based random access resources, or,

and sending at least one set of non-contention based random access resources and the priority of each set of non-contention based random access resources to the source network device.
A terminal device, comprising: a processor and a memory for storing a computer program capable of running on the processor,

wherein the memory is adapted to store a computer program and the processor is adapted to call and run the computer program stored in the memory to perform the steps of the method according to any of claims 14-29.
A network device, comprising: a processor and a memory for storing a computer program capable of running on the processor,

wherein the memory is adapted to store a computer program and the processor is adapted to call and run the computer program stored in the memory to perform the steps of the method according to any of claims 1-13, 30-39, 79-85.
A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 14-29.
A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any of claims 1-13, 30-39, 79-85.
A computer readable storage medium for storing a computer program for causing a computer to perform the steps of the method of any one of claims 1-39, 79-85.
A computer program product comprising computer program instructions to cause a computer to perform the method of any one of claims 1-39, 79-85.
A computer program for causing a computer to perform the method of any one of claims 1-39, 79-85.