CN112806061B

CN112806061B - Switching processing method, user equipment and network equipment

Info

Publication number: CN112806061B
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: 2023-11-03
Anticipated expiration: 2039-03-29
Also published as: WO2020199026A9; WO2020199026A1; CN112806061A

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-side and the effective duration of the UE-side related information of the network side are consistent, or used for determining the effective duration of the UE-side 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 new wireless unlicensed (NR-U, new Radio Unlicensed), the network device needs to perform listen-before-transmit (LBT, listen Before Talk) for downstream transmissions. If the interception result indicates that the channel is in an occupied state, the network equipment needs to intercept the channel again according to a set back-off period, and knows that the channel interception result is in an idle state, and then can transmit data, such as a switching command, to the UE. Since the source network device may be an NR-U network device during the handover process, the network device may only send the handover command in the idle channel state, which results in a long time interval between sending the handover command (handover request Acknowledgement (ACK)) to the source network device by the target network device when the handover command is actually issued to the UE, and thus results in resource failure.

Disclosure of Invention

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

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

transmitting 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 and the network side is consistent, or used for determining the effective duration of the UE-related information

In a second aspect, a handover processing method is provided, 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, 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;

Transmitting second information to the target network device; 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 is consistent with the effective duration of the UE related information stored by the target network equipment, which is determined by the UE.

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;

transmitting a handover request acknowledgement to the source network device;

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 is consistent with the effective duration of the UE related information stored by the target network equipment, which is determined by the UE.

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

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

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

In a sixth aspect, there is provided a UE comprising:

The second communication unit receives the first information sent by the source network equipment;

In a seventh aspect, there is provided a source network device comprising:

a third processing unit for selecting a handover target network device;

a third communication unit which transmits a handover request to the target network device; receiving switching request confirmation information fed back by target network equipment; transmitting second information to the target network device; 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 is consistent with the effective duration of the UE related information stored by the target network equipment, which is determined by the UE.

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

a fourth communication unit for receiving a switching request sent by the source network device;

transmitting a handover request acknowledgement to the source network device;

A ninth aspect provides a handover processing method, applied to a target network device, including:

transmitting the first information to a source network device;

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

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

In an eleventh aspect, a terminal device is provided that includes a processor and a memory. The memory is for storing a computer program and the processor is for calling and running the computer program stored in the memory for performing the method of the second aspect or implementations thereof described above.

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.

A thirteenth aspect provides a chip for implementing the method of any one of the first to fifth aspects or each implementation thereof.

Specifically, the chip includes: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method as in any one of the first to fifth aspects or implementations thereof described above.

In a fourteenth aspect, there is provided a computer-readable storage medium storing a computer program for causing a computer to perform the method of any one of the above-described first to fifth aspects or implementations thereof.

In a fifteenth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to perform the method of any one of the above-described 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 first information assists the UE 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 assists in determining the effective duration of the UE related information. Therefore, the UE side and the network side are guaranteed to be corresponding to understand the effective duration for storing the UE related information, so that unnecessary repeated access and the like caused by releasing the UE related information by the network side when the UE performs handover execution or random access are avoided, and the connection recovery speed of the UE and the network side is improved.

Drawings

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

fig. 2 is a schematic flow chart of a switching processing method according to an embodiment of the present application;

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

FIG. 4 is a schematic diagram of a scenario I provided by an embodiment of the present application;

FIG. 5 is a second schematic view of a scenario provided by an embodiment of the present application;

fig. 6 is a schematic flow chart III of a switching processing method according to an embodiment of the present application;

fig. 7 is a schematic flow chart diagram of a switching processing method according to an embodiment of the present application;

fig. 8 is a schematic flow chart fifth of a switching processing method provided in an embodiment of the present application;

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

fig. 10 is a schematic flow chart seventh of a switching processing method provided in an embodiment of the present application;

fig. 11 is a schematic flow diagram eight of a switching processing method according to an embodiment of the present application;

fig. 12 is a flowchart of a switching processing method according to an embodiment of the present application;

fig. 13 is a schematic flow diagram of a switching processing method according to an embodiment of the present application;

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

Fig. 15 is a schematic diagram of a network device composition structure provided in an embodiment of the present application;

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

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

fig. 18 is a schematic diagram III of a network device composition structure according to an 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 diagram of a communication device according to an embodiment of the present application.

Detailed Description

For a more complete understanding of the nature and the technical content of the embodiments of the present application, reference should be made to the following detailed description of embodiments of the application, taken in conjunction with the accompanying drawings, which are meant to be illustrative only and not limiting of the embodiments of the application.

The following description of the technical solutions according to the embodiments of the present application will be given with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The technical scheme of the embodiment of the application can be applied to various communication systems, such as: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) systems, general packet radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) systems, LTE frequency division duplex (Frequency Division Duplex, FDD) systems, LTE time division duplex (Time Division Duplex, TDD), universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication systems, or 5G systems, and the like.

By way of example, a communication system 100 to which embodiments of the present application may be applied 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. Alternatively, the network device 110 may be a network device (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a network device (NodeB, NB) in a WCDMA system, an evolved network device (Evolutional Node B, eNB or eNodeB) in an LTE system, or a wireless controller in a cloud wireless access network (Cloud Radio Access Network, CRAN), or the network device may be 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 future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

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, connection via wireline, such as via public-switched telephone network (Public Switched Telephone Networks, PSTN), digital subscriber line (Digital Subscriber Line, DSL), digital cable, direct cable connection; and/or another data connection/network; and/or via a wireless interface, e.g., for a cellular network, a wireless local area network (Wireless Local Area Network, WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and/or means of another UE arranged to receive/transmit communication signals; and/or internet of things (Internet of Things, ioT) devices. UEs arranged to communicate via a radio interface may be referred to as "wireless communication terminals", "wireless terminals" or "mobile terminals".

Optionally, a direct terminal (D2D) communication may be performed between UEs 120.

The 3GPP RAN work group agreed on the stand of NR unlicensed operation (WID RP-182878) in 2018, 12, which aims to make NR operate in unlicensed bands, including the following several operating scenarios: a carrier aggregation scenario; double-connection working scene; independent working scenarios.

Generally, the operating Band (Band) of NR-U is 5GHz unlicensed spectrum and 6GHz unlicensed spectrum, (e.g., US 5925-7125 MHz, or European 5925-6425 MHz, or parts of the world); on unlicensed spectrum, the design of NR-U should ensure fairness with other systems already operating on these unlicensed spectrum, such as WiFi, etc. The principle of fairness is that the NR-U cannot have more impact on systems already deployed on unlicensed spectrum (e.g., wiFi) than between these systems.

In order to ensure fair coexistence between systems on unlicensed spectrum, energy detection has been agreed as a basic coexistence mechanism. A general energy detection mechanism is an LBT mechanism, whose basic principle is that a network device or terminal (transmitting end) needs to listen for a certain period of time as specified before transmitting data on an unlicensed spectrum. If the result of interception indicates that the channel is in an idle state, the transmitting end can transmit data to the receiving end. If the interception result indicates that the channel is in an occupied state, the transmission end needs to intercept the channel again according to a set back-off period, and knows that the channel interception result is in an idle state, and then the transmission end can transmit data to the receiving end.

LTE LAA unlicensed band channel access procedure:

for downlink data transmission, on an unlicensed frequency band, the network device needs to execute LBT; in LAA, the priority of channel access is determined by the following table:

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

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

Tmcot, p is the longest time that the network device occupies the channel after preempting the channel, and is related to the channel priority adopted by the network device, for example, the priority is 1, and after channel interception is successful, the channel is occupied for 2ms at most.

To sum up, for the UE side, the network device needs to transmit data to the UE within the MCOT time, if the network device does not preempt the channel, that is, outside the MCOT time, the UE will not receive the scheduling data from the network device to the UE.

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

The embodiment of the application provides a switching processing method, which is applied to source network equipment, as shown in fig. 2, and comprises the following steps:

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

The following describes the schemes provided in this embodiment in various scenarios:

scene 1, determining, by the target network device, first information, indicated to the UE by the source network device. Specifically:

the method further comprises the steps of: and receiving switching request confirmation information sent by the candidate target network equipment, wherein the switching 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 method comprises the steps of stopping time of effective persistence of UE related information, time period of effective persistence of the UE related information, time difference information between target network equipment and source network equipment, starting time of a first timer and duration of the first timer.

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

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

In this scenario, a specific process flow, in conjunction with fig. 3, may be as follows:

the source network device selects candidate switching target network devices and sends switching requests to the candidate target network devices;

the candidate target network device makes a handover decision to determine whether the UE can be accessed. If yes, the candidate target network device (namely one of the target network devices which can be accessed by the UE) sends a switching request confirmation to the source network device, and meanwhile, the message carries first information; the first timer is used for maintaining effective duration of the UE related information stored on the candidate target network equipment side. It should be noted that the first timer may be T304 at the network device side. The effect on T304 may be as shown in the following table:

As can be seen from the above table, in the handover, a T304 timer is introduced for indicating the time of the active handover. T304 turns on when the handover command is received and stops when RA is successful. If T304 is over time, the switching RA is unsuccessful, and RRC reestablishment or SCG failure information process is needed. It is generally understood that the target network device carries T304 to the UE in the handover request ACK, and starts a timer corresponding to T304 after the information is transmitted, and when the timer expires, the target network device deletes the resource configuration reserved for the UE and the UE context. 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, stopping the timer if the first timer is still running.

It should be noted that the first timer may also be a new timer, i.e. a non-T304 timer. 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 duration of the UE related information of the UE side and the network side is consistent.

It should be noted that, when the source network device meets the first preset condition, the target network device may be instructed to start the first timer;

Wherein the first preset condition includes at least one of the following:

receiving a switching request confirmation message; sending a switching command; the transmission of the handover command is successful. The receiving of the handover request acknowledgement information may be when the handover request acknowledgement information is received or when a first preset duration is after the handover request acknowledgement information is received; the first preset duration may be set according to practical situations, for example, may be 0.5ms, etc., which is not limited herein.

The source network device sends a switching command to the UE, and the switching command is sent by the source network device to the UE; or, the first preset condition may be determined to be met when the source network device sends a second preset duration after a handover command to the UE; the second preset time period may be set according to actual situations, and is not limited herein.

The successful sending of the switching command may be understood as the time when the sending of the switching command is successful, or may be understood as the time when the third preset time period is elapsed after the sending of the switching command is successful; the third preset duration may also be set according to the actual situation, and is not limited. The method comprises the steps of carrying out a first treatment on the surface of the

The handover command is successfully sent, or the handover command successful receiving instruction sent by the UE is received, and then the seventh preset time period 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 of success in transmitting the handover command may be when HARQ-acknowledgement ACK feedback is received or when radio link control (RLC, radio Link Control) 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, 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 process flow, referring again to fig. 3, it may include:

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

and the UE receives the switching command sent by the source network equipment and executes the switching process according to the message of the switching command. And the UE determines whether the UE related information reserved at the network equipment side is effective or not according to the first information carried in the switching command. When the UE-related information valid, for example, the timer does not expire or the 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 fail and/or the UE performs an RRC connection reestablishment 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 starts the first timer, until the first timer expires, the effective duration of the UE related information is saved for the target network device; when the UE receives the handover command sent by the source network device, the UE starts its own first timer, and it can be seen from the figure that when the first timer of the target network device expires, the first timer of the UE side has not stopped, so that the UE may possibly cause a possibility that during the handover process, the UE considers that the target network device still holds the relevant information and the target network device has actually released the information.

In fig. 5, it is shown that the UE can receive a handover command sent by the source network device, and further receive first information carried in the handover command, and determine, according to the first information, an effective duration of related information stored in the target network device side, so that when it is determined that the target network device side has released the related information, the UE does not perform processing such as handover or random access.

It can be seen that a disadvantage of the prior art is that the network may release UE resources, when the UE also considers that the current handover is feasible, resulting in unnecessary delay and signalling 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 resources, so as to avoid inconsistent understanding of the UE and the network on resource reservation, and avoid unnecessary UE behaviors, for example, RA is always tried, but actually the network has released the UE context, so that the UE can resume connection with the network as soon as possible.

Scene 2 differs from scene 1 in that the first information of the present scene is generated by the source network device.

The method further comprises the steps of:

first information is generated.

The specific content of the first information of the present scenario may be different from that of scenario 1, for example, the specific content may include: the time for which the handover command is issued is delayed, or the number of times the handover command is issued to fail.

The method further comprises one of:

carrying first information in a switching 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 informing the UE of the first information. The sending time of the RRC message may be the first time when the handover command is issued and after the handover command is issued, the sending time may be sent to the UE. The time difference between the first time and the switching command may be a fourth preset duration.

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

the source network device selects candidate switching target network devices and sends switching requests to the target network devices;

the candidate target network device makes a handover decision HO decision to determine whether the UE can be accessed. If so, the candidate target network device will send a handover request ACK to the source network device.

The source network device generates first information, the first information including at least one of: the time of the HO command issuing delay, or the number of HO command issuing failures. 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 valid of the resource reserved by the target network device and/or the UE context, the time/time duration/expiration of the actual valid of the configuration information included in the handover command, the time when the first timer (e.g., the T304 timer) of the target network device is started, the start time of the UE related information is maintained by the target network device, the expiration time of the UE related information is maintained by the target network device, the time when the timer of the target network device has run when the handover command is received, the time when the UE related information is maintained by the target network device when the handover command is received, and the remaining valid 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: UE context, reserved resource/configuration, RA resource, configuration corresponding to bearing, qoS parameter, service pattern information.

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

The source network device sends a handover command. In the manner illustrated in fig. 6, the source network device sends the first information after sending the handover command, and 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 the switching command sent by the source network equipment and executes the switching process according to the message of the switching command. 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 at the network equipment side is valid or not according to the first information. When the UE-related information valid, for example, the timer does not expire or the 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 fail and/or the UE performs an RRC connection reestablishment procedure (MCG handover) or indicates an SCG failure information procedure to the network.

It should also be noted that a different process than the process flow described above may be,

the first information further includes at least one of:

resources reserved by the target network equipment;

at least one of an actual validity time, a validity duration and a 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 device is started;

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

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

the method comprises the steps that when a switching command is sent, the first timer of the target network equipment runs for a long time;

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

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

That is, in the present scenario, the source device side may perform confirmation of the auxiliary information and transmit the same to the UE. The specific determination mode is that the resources reserved by the target network equipment can be determined through the information sent by the target network equipment. The validity time of the UE context may determine at least one of the validity time, validity duration, and expiration time for storing the information sent by the target network device. The effective time length, the expiration time, and the like of the opportunity due to the configuration information contained in the handover command can be determined by the source network device itself according to the time of itself transmitting the handover 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, because the source network device can acquire 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 itself transmits the handover command, the time when the first timer of the target network device has run when the handover command is transmitted can be determined, and accordingly, the time when the handover command is transmitted, the time when the target network device has stored the UE-related information, and the remaining effective time when the target network device can store the UE-related information, can be determined. That is, the source device side may confirm the auxiliary information in accordance with (the content of) the handover request ACK message from the target base station, or the source device side may confirm the auxiliary information in accordance with (the content of) the handover request ACK message from the target base station and at least one of: the time for which the handover command is issued is delayed, and the number of times the handover command is issued failure. 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, processing based on the assistance information can be performed by the source base station side. Alternatively, the subsequent processing based on the auxiliary information may also be performed by the UE side, and the source network device side may reduce the content of the processing.

A disadvantage of the prior art is that the network may release UE resources, when the UE also considers the current handover to be feasible, resulting in unnecessary delay and signaling overhead. In the scene, the UE can determine the effective time of the target network equipment for actually maintaining the UE context and the configured resources, so that inconsistent understanding of the UE and the network on the resource reservation is avoided, unnecessary UE behaviors (RA is always tried, but the network actually releases the UE context and the like) are avoided, and the UE can be connected with the network in a recovery manner as soon as possible.

On the basis of the scene 2, the following two sub-processing scenes can be further included:

sub-processing scene 1,

The method further comprises the steps of:

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

parameters of an original first timer, delay time of issuing a switching command, failure times of issuing the switching command, time of starting the first timer by a network, expiration time of effective persistence of UE related information, time period of effective persistence of the UE related information, time difference information of target network equipment and source network equipment and 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 of the delay of the HO command issue, or the number of times of the failure of the HO command issue, the time of the network start T304/first timer, the time of the network device side T304 timer start, the expiration time of the valid persistence of the UE related information, the time period of the valid persistence of the UE related information, the time difference information of the target network device and the source network device, and the duration of the first timer.

Or, the method may further include sending parameters of the original first timer, time for delay of issuing the switching command, number of times of failure of issuing the switching command, time for starting the first timer by the network, expiration time for effective persistence of the UE related information, time period for effective persistence of the UE related information, time difference information of the target network device and the source network device, duration of the first timer, and these information to the UE, so that the UE can determine the updated duration of the first timer. That is, the UE may ensure that the remaining time of the effective duration of saving the UE-related information by the network side understood by itself is the same as the remaining effective duration of saving the UE-related information by the network side by updating the duration of the first timer understood by itself.

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 UE-related information retention time.

Sub scene 2,

The first information further includes:

a second period of time; wherein the second time period is different from the time period in the parameters 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 time of the UE and the effective time of the network for reserving the UE related information to be consistent. It is noted that the second duration is based on the second timer implementation, that is to say the second duration of the second timer is different from the duration in the parameters of the first timer (or of the updated first timer).

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

parameters of the first timer, delay time of issuing a switching command, failure times of issuing the switching command, time of starting the first timer by the network, expiration time of effective persistence of UE related information, time period of effective persistence of the UE related information, time difference information of the target network device and the source network device, and duration of the first timer.

The second time period 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 switching command, and the UE considers the UE information valid reserved by the target network equipment during the running period of the second timer.

The source network device determines the second duration, which may be determined for the effective duration of the remaining UE related information that is considered by the source network device to be the target network device; for example, when the parameter of the first timer is successfully transmitted after the transmission of the switch command fails for a plurality of times, a certain time period is consumed, and at this time, the time period needs to be subtracted from the first timer to obtain the second time period. Or, the remaining duration of the first timer may be determined as the second duration according to the on time of the first timer and the time of sending the switching command. Or, the time difference between the target network device and the source network device may be combined again, and the adjusted second time length may be obtained by subtracting the time difference from the second time length obtained before; because there is a time difference between the target network device and the source network device, there is a certain time delay when the source network device sends or receives information to the target network device, and this segment Shi Yantian may be added to the process of correcting the second duration, to obtain the adjusted second duration. Of course, the above is merely an example, and other combinations and manners of determining the second duration are possible in practice, mainly based on the foregoing parameters, which are not exhaustive in the present embodiment.

For example, the source network device determines the timer parameter, such as the duration, based on one of the following information: t304 parameter/first timer parameter, HO command issuing delay time, or HO command issuing failure times, network starting T304/first timer time, network equipment side T304 timer starting time, UE related information effective retention deadline, UE related information effective retention time period, time difference information of target network equipment and source network equipment, and duration of a first timer.

By adopting the scheme, the first information can assist the UE 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 assist in determining the effective duration of the UE related information. Therefore, the UE side and the network side are guaranteed to be corresponding to understand the effective duration for storing the UE related information, so that unnecessary repeated access and the like caused by releasing the UE related information by the network side when the UE performs handover execution or random access are avoided, and the connection recovery speed of the UE and the network side is improved.

The embodiment of the application provides a switching processing method applied to User Equipment (UE), as shown in FIG. 8, comprising the following steps:

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

scene 1, when the first information is sent by the source network device, wherein the first information may be determined by the target network device. The present scenario is described with respect to this case.

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

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

In this scenario, the specific process flow may also be referred to in fig. 3, and 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 (namely one of the target network devices which can be accessed by the UE) sends a switching request confirmation to the source network device, and meanwhile, the message carries first information; the first timer is used for maintaining effective duration of the UE related information stored on the candidate target network equipment side. It should be noted that the first timer may be T304 at the network device side. For a description of T304, reference is made to the above embodiment, and will not be repeated here.

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 RA is successful, stopping the timer if the first timer is still running.

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

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

Specifically, the method for determining the effective preservation time length can include:

and determining the expiration time for storing the UE related information at the target network equipment side according to the expiration time for effectively storing the UE related information, so that the UE can determine the residual effective duration in the process of executing the switching or performing the random access operation.

The period of time during which the UE-related information effectively remains can be understood as an absolute period of time during which the UE-related information is stored on the network side, for example, the absolute period of time can be represented by a radio frame or can be represented by a universal time, so that the UE can determine the effective duration during which the UE-related information of the UE itself is stored on the network side.

The time difference information between the target network device and the source network device can determine the relative time when the source network device obtains the first information of the target network device based on the information, for example, the target network device sends the first information at the first time, then the source network device side can be the first information obtained at the first time plus the time difference, so that the effective duration of the remaining UE related information saved at the target network device side when the first information is received can be determined, and further the effective duration of the UE related information saved at the target network device side understood by the UE side can be adjusted, so that the two keep consistent. Or determining the effective duration of the target network equipment side for storing the UE related information, specifically to the starting time and the ending time of storing the UE related information, so that the effective duration of storing the UE related information confirmed by the UE side and the network side can be further ensured to be 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 of the network side for storing the UE related information based on the absolute time.

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

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

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

That is, when the UE determines that the UE-related information valid is not timed out, for example, the timer is not timed out, or the expiration time point at which the UE-related information is effectively reserved is not reached, the UE performs a handover procedure, or an RA procedure in handover. Otherwise, the handover is considered to fail and/or the UE performs an RRC connection reestablishment 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; and acquiring the first information carried by the RRC message through the RRC message.

the candidate target network device performs HO decision to determine whether the UE can be accessed. If so, the candidate target network device will send a handover request ACK to the source network device.

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

And the UE determines whether the UE related information reserved at the network equipment side is valid or not according to the first information. When the UE-related information valid, for example, the timer does not expire or the 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 fail and/or the UE performs an RRC connection reestablishment 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 equipment;

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

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

The specific determination mode is that the resources reserved by the target network equipment can be determined through the information sent by the source network equipment. The validity time of the UE context may be determined according to at least one of a termination time for the valid persistence of the UE-related information and a time period for the valid persistence of the UE-related information. The starting time of the first timer in the target network device can be determined based on the received first information, and accordingly, the starting time of the target network device for reserving the UE related information can be obtained; in addition, because the source network device can acquire 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 duration that the first timer of the target network device has run when the handover command is received can be determined, and accordingly, the duration that the target network device has stored the UE-related information when the handover command is received and the remaining effective duration that the target network device can store the UE-related information can be determined.

the aforementioned information may be carried in the first information, that is to say the first information sent by the source network device may further comprise at least one of the following:

resources reserved by the target network equipment;

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

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

How the source network device determines the above information is described in the foregoing embodiments, and will not be described here again.

sub-processing scene 1,

The first information further includes: updated first timer.

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

Alternatively, it is also possible to: and receiving parameters for modifying the first timer sent by the source network equipment, and updating the first timer based on the parameters for modifying the first timer.

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

The UE determines the updated first timer based on one of the following information. For example, the original T304 parameter is combined with the time of the delay of the HO command to determine that the handover command is sent after the first timer is started, and then the original first time length of the first timer may be subtracted by the time delay to obtain the updated time length of the first timer. Or determining the time delay caused by the failure of issuing the HO command in the first information, and determining that the UE side needs to adjust the first timer if keeping the same with the network side by combining the time length of the original first timer or the starting time of the first timer, for example, subtracting the time delay of the failure of issuing from the first time length of the first timer to obtain the updated first timer. Of course, the above processing may also be combined with the expiration time of the effective duration of the UE related information, and then combined with the current time to determine that the UE needs to adjust the first duration of the first timer. It should be understood that other adjustment manners are possible, and are not exhaustive in the present 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 related modification parameters, the UE side starts the updated first timer to determine the effective duration of the network side for storing the UE related information, and the effective duration can be kept consistent with the remaining effective duration of the target network side for storing the UE related information, so that the updated T304 can ensure that the understanding of the UE and the target network device on the UE related information retention time is consistent.

Sub scene 2,

The first information further includes:

a second period of time; wherein the second time length is different from the time length in the parameters 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 time of the UE and the effective time of the network for reserving the UE related information to be consistent.

The second time period is different from the first timer time period.

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

For example, the parameters of the second timer or the second time period, such as the time period, are determined according to one of the following information: t304 parameter, HO command issuing delay time, or HO command issuing failure times, network starting T304/first timer time, network equipment side T304 timer starting time, UE related information effective retention deadline, UE related information effective retention time period, time difference information of target network equipment and source network equipment, and first timer duration.

The second duration may be determined for the effective duration of the target network device remaining to store UE related information; for example, when the parameter of the first timer is successfully transmitted after the transmission of the switch command fails for a plurality of times, a certain time period is consumed, and at this time, the time period needs to be subtracted from the first timer to obtain the second time period. Or, the remaining duration of the first timer may be determined as the second duration according to the on time of the first timer and the time of sending the switching command. Or, the time difference between the target network device and the source network device may be combined again, and the adjusted second time length may be obtained by subtracting the time difference from the second time length obtained before; because there is a time difference between the target network device and the source network device, there is a certain time delay when the source network device sends or receives information to the target network device, and this segment Shi Yantian may be added to the process of correcting the second duration, to obtain the adjusted second duration. Of course, the above is merely an example, and other combinations and manners of determining the second duration are possible in practice, mainly based on the foregoing parameters, which are not exhaustive in the present embodiment.

The present embodiment may also provide the following further processing scenes on the basis of the above-described various scenes, and it is noted that the following scenes may also be used alone, that is, the following two processing scenes may be executed without executing the processing provided in the above-described embodiment, specifically as follows:

process scene 1,

Executing switching based on the switching command, and returning from non-contention-based random access to contention-based random access when a third preset condition is met in the switching process;

wherein the third preset condition includes at least one of:

invalidating non-contention based random access resources;

non-contention based random access failure.

That is, in the handover procedure, when the UE fails based on non-contention based random access (CFRA, contention Free Random Access) or CFRA resources are not valid, the UE rolls back from CFRA to contention based random access (CBRA, contention Based Random Access).

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 so, the candidate target network device will send a handover request acknowledge message to the source network device.

The source network device sends a handover command.

The UE performs a handover procedure including a CFRA procedure according to the handover command. The UE rolls back from the CFRA procedure to the CBRA procedure when at least one of the following third preset conditions is met: CRFA resources are invalid and CFRA fails.

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

Alternatively, 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 the higher layer. That is, when the UE side judges that CFRA fails (or CFRA is invalid), the medium access control (MAC, media Access Control) layer does not indicate random access failure to the higher layer (Random Access problem).

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 CFRA resources not valid or CFRA fails in the case that UE related information such as UE context is reserved. If the RA is directly considered to fail, or the re-establishment is triggered, or the process of not returning to the UE CBRA is triggered SCG change failure to be executed according to the existing protocol, the UE will access to the network to delay, even the UE will communicate with the network for a long time to delay because the UE delays access to cause the time of missing the MCOT, which results in the problems of reduced service QoS, degraded UE experience, etc. The present processing scenario may address this problem by rollback CBRA and/or not reporting RA problems.

Processing scene 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-contention random access resources of the plurality of sets of non-contention 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 a higher layer;

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

processing a first non-contention based random access resource of a plurality of sets of non-contention based random access resources; when judging that the processing of the first non-contention based random access resource fails, if other non-contention based random access resources except the first non-contention based random access resource exist, not indicating the random access failure to a higher layer;

processing a first non-contention based random access resource of a plurality of sets of non-contention based random access resources; when judging that the processing of the first non-contention based random access resource fails, if other non-contention based random access resources except the first non-contention based random access resource exist, indicating the random access failure to a higher layer.

In particular, the UE may perform the processing through one of a set of non-competing 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-competing random access resources again for access.

The processing scene may include: a UE may be configured with multiple sets of non-competing random access resources. 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 of the access points 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 present processing scenario may include: a UE may be configured with multiple sets of non-competing random access resources. At this time, when it is determined that the processing of the first non-contention based random access resource fails, if there are other non-contention based random access resources 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 through one of a set of non-contention random access resources. At this time, the random access failure may not be indicated to the higher layer if the failure occurs. The UE may then select another set of non-competing random access resources again for access.

Unlike the foregoing processing scenario 1, a plurality of sets of CFRA resources can be set in the present scenario, where at least one of the following configurations is different among different CFRA resources: different resource valid starts, different PRACH scene occalation identification index, different PRACH resource time domain/frequency domain position interval, and different preamble identification index.

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

the candidate target network device makes a handover decision HO decision to determine whether the UE can be accessed. If so, the candidate target network device will send a handover request ACK to the source network device. The target network device configures at least one set of CFRA resources, wherein at least one different configuration exists in different CFRA resources, and specific configuration content is shown in the foregoing and will not be described herein. In this way, multiple sets of CFRA resources can be utilized, the positions of the RA resources which can be tried to be used are increased, the total time of valid of the CFRA resources is increased, and the probability of success 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, which can be understood as the first CFRA resource.

The UE performs a handover procedure including a CFRA procedure according to the message content in the handover command.

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

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

For another example, 2 sets of CFRA resources are configured for the handed-off UE, each set of resources PRACH occasion index being different, e.g., one index1 and one index2, since LBT causes the UE to receive HO command long after the target network device sends the handover request ACK, in order to increase the resource locations/opportunities of CFRA that the UE can attempt, the UE performs CFRA procedure using the resources of two sets of CFRA to increase the opportunities for the UE to access the target network in a limited MCOT time.

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

For another example, 2 sets of CFRA resources are configured for the handed over UE, optionally with simultaneous notification of usage priority for each set of resources. The UE firstly uses CFRA resources with high priority or optionally one set of CFRA resources to execute RA process, if RA fails, the UE does not report RA problem, and then attempts to adopt the other set of CFRA resources to execute RA process until RA fails or RA succeeds. This has the advantage of increasing the chance of the UE accessing 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 CFRA resources not valid or 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 process of not returning to the UE CBRA is triggered SCG change failure to be executed according to the existing protocol, the UE will access to the network to delay, even the UE will communicate with the network for a long time to delay because the UE delays access to cause the time of missing the MCOT, which results in the problems of reduced service QoS, degraded UE experience, etc. The present solution solves this problem by configuring/carrying at least one CFRA resource.

The embodiment of the application provides a switching processing method, which is applied to source network equipment, as shown in fig. 11, and comprises the following steps:

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: transmitting second information to the target network device; 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 is consistent with the effective duration of the UE related information stored by the target network equipment, which is determined by the UE.

That is, the effect similar to the foregoing embodiment is achieved in a network-side interaction manner without involving the influence on the air interface and the UE in the present embodiment.

The source network device may send a handover command or send a specific indication message to the target network device/candidate target network device after the handover command is sent successfully, such as a handover command sending acknowledgement message, to ensure that the UE and the target network device understand whether valid related information of the UE is consistent, or indicate to the target network device that the handover command sent successfully to the UE, or indicate to the target network device that the resource maintenance/timer maintenance state is restarted.

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

transmitting a handover command to the UE; or, successfully sending a switching command to the UE; or, an indication that the handover command was successfully received by the UE is received. The sending of the handover command to the UE may be understood as the source network device sending the handover command to the UE for the first time; in addition, the sending of the second information may be when a fifth preset duration is long after the first sending of the switching command; of course, if the source network device may send the handover command multiple times, it may also be understood that the handover command is sent a second time, or a third time, which is not exhaustive herein. The successful sending of the handover command to the UE may be considered to be successful when acknowledgement information fed back by the UE is received, and in addition, the timing of sending the second information may be the timing of acknowledging the successful sending of the handover command or the sixth preset duration after acknowledging the successful sending of the handover command. The fifth preset time period may be the same as or different from the sixth preset time period. In another case, the second information can be sent when the UE receives an indication that the handover command is successfully received; here, the second information may be determined to be transmitted at a time when the indication of successful reception of the switching command is received, or the second information may be transmitted after a period of time after the indication of successful reception of the switching command is received; the duration of a period of time can be set according to practical situations, and is not exhaustive.

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

the source network device selects candidate switching target network devices and sends switching requests to the candidate target network devices; optionally, the source network device informs the target network device of the cell type of the own cell, such as whether it is an NR-U cell, and/or requests the target network device for the cell type of the candidate target cell, such as whether it is an NR-U cell. Optionally, the above information is carried in the handover request message.

The candidate target network device performs HO decision to determine whether the UE can be accessed. If so, the candidate target network device will send a handover request ACK to the source network device. Optionally, the candidate target network device notifies the source network device of 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 it is an NR-U cell.

After the source network device sends the air interface switching command to the UE, or after the source network device sends the air interface switching command successfully, or after receiving the indication that the UE successfully receives the switching command, the source network device sends specific indication information/information, such as a switching command sending acknowledgement message, to the target network device/candidate target network device, that is, the second information may be sent. The second information includes at least one of: indicating the successful transmission of a switching command sent by source network equipment to UE to target network equipment; indicating to the target network device that the source network device has sent a handover command; indicating a resource maintenance behaviour/state reset to the target network device; indicating a first timer restart to the target network device; indicating a second duration to the target network device; indicating the UE to start a timer to the target network equipment; indicating to the target network device that the UE considers the target base station UE related information to be valid at this time.

The second information, namely specific indication information/information, is used for ensuring that the understanding of the UE and the target network equipment on whether valid of the UE related information is consistent, or indicates to the target network equipment that the source network equipment sends the switching command sent by the UE successfully, or the source network equipment already sends the switching command, or indicates to the target network equipment that the resource maintenance behavior/state is reset, or indicates to the target network equipment that the timer maintenance state is restarted.

The second information can be sent to enable the target network device to determine to start the first timer according to the indication that the switching command in the second information is sent successfully, and the UE side starts to execute switching processing only when receiving the switching command, so that the UE can start to determine the effective duration of the target network device side for storing the UE related information, and when the target network device is indicated by the second information, the time of the target network device for starting the first timer is basically consistent with the time of the target network device side for starting the first timer understood by the UE, so that the effective duration of the UE related information storage is consistent with the time understood by the UE side on the target network device side. Or the source network device indicates to the target network device that the handover command has been sent currently, and at this time, the target network device side may start the first timer to determine the effective duration of the UE related information, and also may make the time when the target network device starts the first timer consistent with the time when the target network device side confirmed by the UE side starts the first timer. Or, the first timer is restarted to indicate the starting time of the first timer, and the information can also be determined by referring to the time of successfully sending the handover command, for example, when the handover command is successfully sent, the UE can be understood to consider that the first timer on the target network device side starts to start, and then the source network device indicates the first timer to the target network device to restart so that the restart time of the first timer on the target network device side is consistent with the UE side, thereby realizing that the effective duration of saving the UE related information, which is understood by the UE side and the network side, is consistent. Or, it may also indicate to the target network device a resource maintenance action and/or a state reset, that is, control the resource maintenance action of the target network device to process based on the case of sending the handover command or successfully sending the handover command, or reset the effective duration of the target network device side for storing the state of the UE related information according to the time of sending the handover command or successfully sending the handover command. And in another case, indicating a second time length to the target network device, where the second time length may be an effective time length for the UE side understood by the source network device to consider that the target network device stores UE related information, and indicating the second time length to the target network device may enable the target network device to keep the same effective time length as the UE.

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

A disadvantage of the prior art is that the network may release UE resources, when the UE also considers the current handover to be feasible, resulting in unnecessary delay and signaling overhead. The embodiment avoids the influence on the air interface and the UE, and achieves similar effects in a network side interaction mode.

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

process scene 1,

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

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

wherein the third preset condition includes at least one of:

Invalidating non-contention based random access resources;

non-contention based random access failure.

That is, in the handover procedure, when the UE fails based on non-contention based random access (CFRA, contention Free Random Access) or CFRA resources are not valid, the UE rolls back from CFRA to contention based random access (CBRA, contention Based Random Access). At this time, the UE may or may not report the random access failure.

The specific process flow is consistent with the detailed description of the processing scenario 1 provided in the foregoing embodiment, and will not be repeated here.

Processing scenario 2, multiple sets of non-competing random access resources may be indicated for the UE.

The present embodiment may further include: the method further comprises the steps of:

transmitting a handover command to the UE;

the switching command carries at least one set of random access resources based on non-contention, or the switching 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:

different effective initiation of resources, different PRACH time marks, different PRACH resource time domain/frequency domain position intervals, different preamble sequence parameters and different preamble sequence marks.

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 a set 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-competing random access resources again for access.

The processing scene may include: a UE may be configured with multiple sets of non-competing random access resources. 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 of the access points 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 is indicated to the higher layer or not indicated to the higher layer

The specific process flow is consistent with the detailed description of the processing scenario 2 provided in the foregoing embodiment, and will not be repeated here.

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 CFRA resources not valid or 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 process of not returning to the UE CBRA is triggered SCG change failure to be executed according to the existing protocol, the UE will access to the network to delay, even the UE will communicate with the network for a long time to delay because the UE delays access to cause the time of missing the MCOT, which results in the problems of reduced service QoS, degraded UE experience, etc. This problem is solved by means of configuring/carrying at least one CFRA resource.

The embodiment of the application provides a switching processing method, which is applied to target network equipment, as shown in fig. 13, and comprises the following steps:

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

step 52: transmitting a handover request acknowledgement to the source network device;

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 is consistent with the effective duration of the UE related information stored by the target network equipment, which is determined by the UE.

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 sent successfully, the source network device sends specific indication information to the target network device/candidate target network device, such as a switching command sending confirmation message, that is, may send the second information. The second information includes at least one of:

The source network equipment sends a successful indication 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, the second information, namely, the specific indication message/information, is used to ensure that the UE and the target network device are consistent with each other about whether the UE related information valid is understood, or indicate to the target network device that the source network device successfully sends the handover command sent by the UE, or that the source network device has sent the handover command, or indicate to the target network device that the resource maintenance behavior/state is reset, or indicate to the target network device that the timer maintenance state is restarted.

That is, the second information may be sent, so that the target network device determines to start the first timer according to the indication that the handover command in the second information is sent successfully, and since the UE side starts to perform the handover process when receiving the handover command, the UE will start to determine the effective duration of saving the UE related information by the target network device side, and when the target network device is indicated by the second information, the time when the target network device starts the first timer can be basically consistent with the time when the target network device understood by the UE starts the first timer by the target network device side, so that the effective duration of saving the UE related information on the target network device side can be consistent with the time understood by the UE side. Or the source network device indicates to the target network device that the handover command has been sent currently, and at this time, the target network device side may start the first timer to determine the effective duration of the UE related information, and also may make the time when the target network device starts the first timer consistent with the time when the target network device side confirmed by the UE side starts the first timer. Or, the first timer is restarted to indicate the starting time of the first timer, and the information can also be determined by referring to the time of successfully sending the handover command, for example, when the handover command is successfully sent, the UE can be understood to consider that the first timer on the target network device side starts to start, and then the source network device indicates the first timer to the target network device to restart so that the restart time of the first timer on the target network device side is consistent with the UE side, thereby realizing that the effective duration of saving the UE related information, which is understood by the UE side and the network side, is consistent. Or, it may also indicate to the target network device a resource maintenance action and/or a state reset, that is, control the resource maintenance action of the target network device to process based on the case of sending the handover command or successfully sending the handover command, or reset the effective duration of the target network device side for storing the state of the UE related information according to the time of sending the handover command or successfully sending the handover command. And in another case, indicating a second time length to the target network device, where the second time length may be an effective time length for the UE side understood by the source network device to consider that the target network device stores UE related information, and indicating the second time length to the target network device may enable the target network device to keep the same effective time length as the UE.

process scene 1,

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

The method further comprises the steps of:

at least one set of non-contention based random access resources is transmitted to the source network device, or,

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

It should be understood that 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 in this embodiment are ultimately sent to the UE by the source network device.

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

The embodiment of the application provides a switching processing method, which is applied to target network equipment, as shown in fig. 14, and comprises the following steps:

step 61: transmitting the first information to a 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 further comprises the steps of: 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 in which the target network device determines the first information may be to obtain the effective duration of saving the UE related information by itself, and then determine the termination time of the effective persistence of the UE related information based on the current time and the time when the first timer is started; or, in combination with the time difference information between the target network device and the source network device, determining the time when the source network device receives the handover request acknowledgement information, determining the starting time of the first timer, and carrying both parameters 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 receives the first information. In addition, the duration of the first timer is determinable by the target network device side, so that the first timer can be directly added into 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 (namely one of the target network devices which can be accessed by the UE) sends a switching request confirmation to the source network device, and meanwhile, the message carries first information; the first timer is used for maintaining effective duration of the UE related information stored on the candidate target network equipment side. It should be noted that the first timer may be T304 at the network device side. The description of T304 is as described above and will not be repeated here.

It is noted that when the second preset condition is satisfied, the first timer is started;

wherein the second preset condition includes at least one of the following:

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

The target network device may send the handover request acknowledgement information at the time of 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, etc., which is not limited herein.

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

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

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

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

and the UE receives the switching command sent by the source network equipment and executes the 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 the first timer when the first preset condition is satisfied;

wherein the first preset condition includes at least one of the following:

receiving a switching request confirmation message; sending a switching command; the transmission of the handover command is successful.

The receiving of the handover request acknowledgement information may be when the handover request acknowledgement information is received or when a first preset duration is after the handover request acknowledgement information is received; the first preset duration may be set according to practical situations, for example, may be 0.5ms, etc., which is not limited herein.

The successful sending of the switching command may be understood as the time when the sending of the switching command is successful, or may be understood as the time when the third preset time period is elapsed after the sending of the switching command is successful; the third preset time length can also be set according to actual conditions, and is not limited; the handover command is successfully sent, or the handover command successful receiving instruction sent by the UE is received, and then the seventh preset time period 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 the following:

carrying first information in a switching command;

the first information is carried in an RRC message.

sub-processing scene 1,

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

Sub scene 2,

The first information further includes:

a second period of time; wherein the second time length is different from the time length in the parameters 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 from the source network device;

Further, the UE may further include: the second processing unit 82 performs at least one of the following when determining, based on the valid duration of the UE-related information stored in the target network device side, that the UE-related information stored in the target network device side is invalid:

That is, when determining the UE-related information valid, for example, the timer does not expire or the 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 fail and/or the UE performs an RRC connection reestablishment 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 equipment;

The time when the first timer of the target network device is started;

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

resources reserved by the target network equipment;

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

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

sub-processing scene 1,

The first information further includes: updated first timer.

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

Sub scene 2,

The first information further includes: a second period of time; wherein the second time period is different from the time period in the parameters of the first timer.

The second time period is different from the first timer time period.

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

Process scene 1,

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

wherein the third preset condition includes at least one of:

invalidating non-contention based random access resources;

non-contention based random access failure.

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 scene 2, the second processing unit, performing one of:

Specifically, in the present 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 of the non-contention set of random access resources. At this time, if a failure occurs, the random access failure may be indicated to the higher layer through the second communication unit. An additional set of non-competing random access resources may then be selected again for access.

The processing scene may include: a UE may be configured with multiple sets of non-competing random access resources. At this time, the second processing unit 82 controls the processing to be performed through at least one set of non-contention random access resources. At this time, when any one of the access points 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 is indicated to the higher layer or not indicated to the higher layer

In addition, the present processing scenario may include: the second processing unit 82, when judging that the processing of the first non-contention based random access resource fails, does not instruct the higher layer of the random access failure if there are other non-contention based random access resources 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; transmitting second information to the target network device; 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 is consistent with the effective duration of the UE related information stored by the target network equipment, which is determined by the UE.

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

The sending of the handover command to the UE may be understood as the source network device sending the handover command to the UE for the first time; in addition, the sending of the second information may be when a fifth preset duration is long after the first sending of the switching command; of course, if the source network device may send the handover command multiple times, it may also be understood that the handover command is sent a second time, or a third time, which is not exhaustive herein. The successful sending of the handover command to the UE may be considered to be successful when acknowledgement information fed back by the UE is received, and in addition, the timing of sending the second information may be the timing of acknowledging the successful sending of the handover command or the sixth preset duration after acknowledging the successful sending of the handover command. The fifth preset time period may be the same as or different from the sixth preset time period. In another case, the second information can be sent when the UE receives an indication that the handover command is successfully received; here, the second information may be determined to be transmitted at a time when the indication of successful reception of the switching command is received, or the second information may be transmitted after a period of time after the indication of successful reception of the switching command is received; the duration of a period of time can be set according to practical situations, and is not exhaustive.

process scene 1,

The third communication unit 92 configures non-contention based random access resources for the UE.

The foregoing details of this processing scenario are not repeated here.

Processing scene 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 for receiving a handover request sent by a source network device; transmitting a handover request acknowledgement to the source network device; 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 is consistent with the effective duration of the UE related information stored by the target network equipment, which is determined by the UE.

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

The second information includes at least one of:

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.

Process scene 1,

A fourth communication unit 1001 configured non-contention based random access resources for the UE;

wherein the third preset condition includes at least one of:

invalidating non-contention based random access resources;

non-contention based random access failure.

The present 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 a set 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-competing random access resources again for access. That is, at this time, the third communication unit may also receive information of access failure based on a certain set of non-contention random access resources from the UE.

The embodiment of the 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 sends handover request acknowledgement information to the source network device, where the handover request acknowledgement information carries the first information.

It should be noted that the target network device further includes:

the fifth processing unit 1102 starts the first timer when the second preset condition is satisfied;

wherein the second preset condition includes at least one of the following:

process scene 1,

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

The method further comprises the steps of:

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

Optionally, as shown in fig. 20, the communication device 1200 may further include a memory 1220. Wherein the processor 1210 may call and run computer programs from the memory 1220 to implement the methods of embodiments of the present application.

The memory 1220 may be a separate device from the processor 1210 or may be integrated with 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 send information or data to other devices, or receive information or data sent by other devices.

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

The embodiment of the application also provides a chip. The chip includes a processor that can call and run a computer program from memory to implement the methods of embodiments of the present application.

Optionally, the chip may further comprise a memory. The processor may call and run the computer program from the memory to implement the method according to the embodiment of the present application.

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

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

Optionally, the chip may be applied to a network device or UE in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

The embodiment of the application also provides a communication system. The communication system includes a UE and a network device.

Wherein the UE may be configured to implement the corresponding function implemented by the UE in the above method, and the network device may be configured to implement the corresponding function implemented by the network device in the above method. For brevity, the description is omitted here.

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

It will be appreciated that the memory in embodiments of the application may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct 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 memory is illustrative but not restrictive, and for example, the memory in the embodiments of the present application may be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct RAM (DR RAM), and the like. That is, the memory in 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 a computer program.

Optionally, the computer readable storage medium may be applied to a network device in the embodiment of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein 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 causes a computer to execute corresponding processes implemented by the mobile terminal/UE in each method in the embodiment of the present application, which are not described herein for brevity.

The embodiment of the application also provides a computer program product comprising computer program instructions.

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

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

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to a network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

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 caused to execute corresponding processes implemented by the mobile terminal/UE in each method in the embodiment of the present application, which is not described herein 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 solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

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

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

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

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

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

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within 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

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

transmitting the first information to User Equipment (UE); wherein the first information includes at least one of: the method comprises the steps of stopping time for effectively storing UE related information, time period for effectively storing the UE related information, time difference information between target network equipment and source network equipment, starting time of a first timer, duration of the first timer and second duration;

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 the effective duration of the UE-related information of the network side, or used for indicating the effective duration of the UE-related information reserved for the target network equipment for the UE;

the first timer is used for maintaining effective duration of the UE related information stored at the candidate target network equipment side;

The second time length is realized based on a second timer, and the second time length is different from the time length in the parameters of the first timer.

2. 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.

3. The method of claim 1, wherein the UE-related information includes, but is not limited to, at least one of: the context content of the UE, reserved resources/configuration, random access RA resources, configuration corresponding to bearing, quality of service QoS parameters and service type information.

4. The method of claim 1, 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 includes at least one of the following:

5. The method of claim 1, wherein the method further comprises:

first information is generated.

6. The method of claim 5, wherein the first information includes:

The time for which the handover command is issued is delayed, or the number of times the handover command is issued to fail.

7. The method of claim 6, wherein the first information further comprises at least one of:

resources reserved by the target network equipment;

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

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

8. The method of any of claims 5-7, wherein the method further comprises one of:

carrying first information in a switching command;

the first information is carried in an RRC message.

9. The method of claim 5, wherein the method further comprises:

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

10. The method of claim 5, wherein the second duration is used to reconcile the UE and a network with a validity time for retaining the UE-related information.

11. The method of claim 10, wherein the method further comprises:

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

12. A handover processing method applied to a user equipment UE, the method comprising:

receiving first information sent by source network equipment; wherein the first information includes at least one of: the method comprises the steps of stopping time for effectively storing UE related information, time period for effectively storing the UE related information, time difference information of target network equipment and source network equipment, starting time of a first timer at the network equipment side, duration of the first timer and second duration;

13. The method of claim 12, wherein the UE-related information includes, but is not limited to, at least one of: the context content of the UE, reserved resources/configuration, RA resources, configuration corresponding to bearing, qoS parameters and service type information.

14. The method of claim 12, wherein the method further comprises:

and determining the effective storage duration of the UE related information stored by the target network equipment side based on the first information.

15. The method of claim 14, wherein the method further comprises:

and executing switching processing or executing random access processing in the switching process when the UE related information stored in the target network equipment side is determined to be effective based on the effective duration of the UE related information stored in the target network equipment side.

16. The method of claim 15, wherein the method further comprises:

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

confirming a switching failure;

performing an RRC connection reestablishment procedure;

the SCG failure information procedure is indicated to the network.

17. The method of any one of claims 12, 15, 16, wherein the first information includes:

18. The method of claim 17, wherein the method further comprises:

Based on the first information, at least one of the following information is determined:

resources reserved by the target network equipment;

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

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

the method comprises the steps of receiving a time length of a target network device timer running when a switching command is received;

the method comprises the steps that when a switching command is received, the target network equipment has a duration of keeping UE related information;

and when receiving the switching command, the effective duration of the UE related information remained in the target network equipment.

19. The method of claim 17, wherein the first information further comprises at least one of:

resources reserved by the target network equipment;

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

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

the method comprises the steps that when source network equipment sends a switching command, a target network equipment timer runs;

the method comprises the steps that when source network equipment sends a switching command, target network equipment has a duration of keeping UE related information;

and when the source network equipment sends a switching command, the effective duration of the UE related information remained in the target network equipment.

20. The method of claim 18 or 19, wherein the method further comprises one of:

acquiring first information carried by the switching command;

and acquiring the first information carried by the RRC message through the RRC message.

21. The method of any one of claims 12, 18, 19, wherein the method further comprises:

a second time period is determined.

22. The method of claim 21, wherein the method further comprises:

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

23. The method of claim 12, wherein the method further comprises:

receiving a switching command sent by source network equipment;

wherein the third preset condition includes at least one of:

invalidating non-contention based random access resources;

non-contention based random access failure.

24. The method of claim 23, wherein the method further comprises: when the non-contention based random access fails, the random access failure is not indicated to the higher layer.

25. The method of claim 12, wherein the method further comprises one of:

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

transmitting second information to the target network device; 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 is consistent with the effective duration of the UE related information stored by the target network equipment, which is determined by the UE;

Wherein the second information includes at least one of:

indicating the successful transmission of a switching command sent by source network equipment to UE to target network equipment;

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

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

indicating a first timer restart to the target network device;

indicating a second duration to the target network device;

27. The method of claim 26, wherein prior to sending the second information to the target network device, the method further comprises:

transmitting a handover command to the UE;

or, successfully sending a switching command to the UE;

or, an indication that the handover command was successfully received by the UE is received.

28. The method of claim 26, wherein the UE-related information includes, but is not limited to, at least one of: the context content of the UE, reserved resources/configuration, RA resources, configuration corresponding to bearing, qoS parameters and service type information.

29. The method of claim 26, wherein the method further comprises:

transmitting a handover command to the UE;

30. The method of claim 29, wherein at least one of the following information for different non-contention based random access resources is different:

31. A switching processing method is applied to target network equipment and comprises the following steps:

receiving a switching request sent by source network equipment;

transmitting a handover request acknowledgement to the source network device;

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 is consistent with the effective duration of the UE related information stored by the target network equipment, which is determined by the UE; wherein the second information includes at least one of:

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;

32. The method of claim 31, wherein the UE-related information includes, but is not limited to, at least one of: the context content of the UE, reserved resources/configuration, RA resources, configuration corresponding to bearing, qoS parameters and service type information.

33. The method of claim 31, wherein the method further comprises:

34. A source network device, comprising:

the first communication unit is used for sending the first information to the User Equipment (UE); wherein the first information includes at least one of: the method comprises the steps of stopping time for effectively storing UE related information, time period for effectively storing the UE related information, time difference information between target network equipment and source network equipment, starting time of a first timer, duration of the first timer and second duration;

35. The source network device of claim 34, wherein the first communication unit receives handover request acknowledgement information sent by the target network device, where the handover request acknowledgement information carries the first information.

36. The source network device of claim 34, wherein the UE-related information includes, but is not limited to, at least one of: the context content of the UE, reserved resources/configuration, random access RA resources, configuration corresponding to bearing, quality of service QoS parameters and service type information.

37. The source network device of claim 34, wherein the first communication unit,

Wherein the first preset condition includes at least one of the following:

38. The source network device of claim 34, wherein the source network device further comprises:

and the first processing unit generates first information.

39. The source network device of claim 38, wherein the first information includes:

40. The source network device of claim 39, wherein the first information further comprises at least one of:

resources reserved by the target network equipment;

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

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

41. The source network device of any of claims 38-40, wherein the first processing unit performs one of:

carrying first information in a switching command;

the first information is carried in an RRC message.

42. The source network device of claim 41, wherein the first processing unit determines the updated first timer parameter based on at least one of: parameters of an original first timer, delay time of issuing a switching command, failure times of issuing the switching command, time of starting the first timer by a network, expiration time of effective persistence of UE related information, time period of effective persistence of the UE related information, time difference information of target network equipment and source network equipment and duration of the original first timer;

and the first communication unit sends the updated parameters of the first timer to the UE.

43. The source network device of claim 38, the second duration is used to reconcile the UE and the network with valid times for retaining the UE-related information.

44. The source network device of claim 43, wherein the first processing unit determines the parameter of the second duration based on at least one of:

45. A UE, comprising:

the second communication unit receives the first information sent by the source network equipment; wherein the first information includes at least one of: the method comprises the steps of stopping time for effectively storing UE related information, time period for effectively storing the UE related information, time difference information of target network equipment and source network equipment, starting time of a first timer at the network equipment side, duration of the first timer and second duration; the second time length is realized based on a second timer, and the second time length is different from the time length in the parameters of the first timer;

The first timer is used for maintaining effective duration of the UE related information stored on the candidate target network equipment side.

46. The UE of claim 45, wherein the UE-related information includes, but is not limited to, at least one of: the context content of the UE, reserved resources/configuration, RA resources, configuration corresponding to bearing, qoS parameters and service type information.

47. The UE of claim 45, wherein the UE further comprises:

and the second processing unit determines the effective storage duration of the UE related information stored by the target network equipment side based on the first information.

48. The UE according to claim 47, wherein the second processing unit performs handover processing or performs random access processing in a handover procedure when it is determined that the UE-related information stored in the target network device side is valid based on a valid duration in which the UE-related information is stored in the target network device side.

49. The UE of claim 48, wherein the second processing unit performs at least one of the following when determining that the UE-related information stored on the target network device side is invalid based on a valid duration for storing the UE-related information on the target network device side:

Confirming a switching failure;

performing an RRC connection reestablishment procedure;

the SCG failure information procedure is indicated to the network.

50. The UE of any of claims 46, 48, 49, wherein the first information includes:

51. The UE of claim 50, wherein the second processing unit determines, based on the first information, at least one of:

resources reserved by the target network equipment;

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

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

52. The UE of claim 50, wherein the first information further comprises at least one of:

resources reserved by the target network equipment;

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

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

53. The UE of claim 51 or 52, wherein the second processing unit performs one of:

acquiring first information carried by the switching command;

54. The UE of claim 51 or 52, wherein the second processing unit determines a second duration.

55. The UE of claim 54, wherein the second processing unit determines the parameter of the second duration based on at least one of:

56. The UE of claim 45, wherein the second communication unit receives a handover command sent by a source network device;

the second processing unit is used for executing switching based on the switching command, and returning to the random access based on the non-contention from the random access based on the contention in the switching process when a third preset condition is met;

wherein the third preset condition includes at least one of:

invalidating non-contention based random access resources;

non-contention based random access failure.

57. The UE of claim 56, wherein the second processing unit does not indicate a random access failure to a higher layer when a non-contention based random access fails.

58. The UE of claim 56, wherein the second processing unit,

one of the following is performed:

59. A source network device, comprising:

a third processing unit for selecting a handover target network device;

a third communication unit which transmits a handover request to the target network device; receiving switching request confirmation information fed back by target network equipment; transmitting second information to the target network device; 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 is consistent with the effective duration of the UE related information stored by the target network equipment, which is determined by the UE;

wherein the second information includes at least one of:

indicating a first timer restart to the target network device;

indicating a second duration to the target network device;

60. The source network device of claim 59, wherein the third communication unit sends a handover command to the UE;

or, successfully sending a switching command to the UE;

61. The source network device of claim 59, wherein the UE-related information includes, but is not limited to, at least one of: the context content of the UE, reserved resources/configuration, RA resources, configuration corresponding to bearing, qoS parameters and service type information.

62. The source network device of claim 59, wherein the third communication unit sends a handover command to the UE;

63. The source network device of claim 62, wherein at least one of the following information for different non-contention based random access resources is different:

64. A target network device, comprising:

transmitting a handover request acknowledgement to the source network device;

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;

65. The target network device of claim 64, wherein the UE-related information includes, but is not limited to, at least one of: the context content of the UE, reserved resources/configuration, RA resources, configuration corresponding to bearing, qoS parameters and service type information.

66. The target network device of claim 64, wherein the fourth communication unit,

67. A switching processing method is applied to target network equipment and comprises the following steps:

transmitting the first information to a source network device; wherein the first information includes at least one of: the method comprises the steps of stopping time for effectively storing UE related information, time period for effectively storing the UE related information, time difference information between target network equipment and source network equipment, starting time of a first timer, duration of the first timer and second duration;

68. The method of claim 67, 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.

69. The method of claim 67, wherein the UE-related information includes, but is not limited to, at least one of: the context content of the UE, reserved resources/configuration, random access RA resources, configuration corresponding to bearing, quality of service QoS parameters and service type information.

70. The method of claim 67, wherein the method further comprises:

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

wherein the second preset condition includes at least one of the following:

71. The method of claim 67, wherein the method further comprises:

72. A target network device, comprising:

a fifth communication unit that transmits the first information to the source network device; wherein the first information includes at least one of: the method comprises the steps of stopping time for effectively storing UE related information, time period for effectively storing the UE related information, time difference information between target network equipment and source network equipment, starting time of a first timer, duration of the first timer and second duration;

73. The target network device of claim 72, wherein the fifth communication unit sends handover request acknowledgement information to a source network device, the handover request acknowledgement information carrying the first information.

74. The target network device of claim 72, wherein the UE-related information includes, but is not limited to, at least one of: the context content of the UE, reserved resources/configuration, random access RA resources, configuration corresponding to bearing, quality of service QoS parameters and service type information.

75. The target network device of claim 72, wherein the target network device further comprises:

a fifth processing unit for starting the first timer when the second preset condition is satisfied;

wherein the second preset condition includes at least one of the following:

76. The target network device of claim 72, wherein the fifth communication unit,

77. 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, said processor being adapted to invoke and run the computer program stored in said memory, performing the steps of the method according to any of claims 12-25.

78. 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, said processor being adapted to invoke and run the computer program stored in said memory, performing the steps of the method according to any of claims 1-11, 26-33, 67-71.

79. A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any of claims 12-25.

80. A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any of claims 1-11, 26-33, 67-71.

81. A computer readable storage medium for storing a computer program which causes a computer to perform the steps of the method of any one of claims 1-33, 67-71.