CN113810957B

CN113810957B - Implementation method and device for simplifying switching process

Info

Publication number: CN113810957B
Application number: CN202010534464.6A
Authority: CN
Inventors: 田博
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2022-10-11
Anticipated expiration: 2040-06-12
Also published as: CN113810957A

Abstract

The application discloses a method and a device for simplifying a switching process, wherein when a terminal device is switched from a source base station to a target base station, the method comprises the following steps: the network equipment receives a forward transmission reallocation request message; wherein, the Indication flag fields of the forward retransmission request message carry first Indication information; and the network equipment determines the core network equipment corresponding to the source base station according to the first indication information. The method and the device are used for solving the technical problem that when the existing terminal equipment is switched across systems, no reasonable mode is provided for the MME to identify the switching type of the terminal equipment, so that the service processing process is complicated.

Description

Implementation method and device for simplifying switching process

Technical Field

The present application relates to the field of communications technologies, and in particular, to an implementation method and an implementation device for simplifying a handover procedure.

Background

When a terminal device is handed over from a fifth generation (5G) base station to a 4G base station or between 4G base stations, a Mobility Management node function (MME) needs to carry a mandatory handover type field when sending a handover request message to a target base station in handover, and thus the MME needs to be able to identify whether the handover type is handover from the 5G base station to the 4G base station or handover between the 4G base stations and inform the target base station of the handover type.

When the existing terminal equipment is switched across systems, because no reasonable mode is provided to allow the MME to identify the switching type of the terminal equipment, the problem of complicated service processing process is caused.

Disclosure of Invention

The application provides a method and a device for simplifying a switching process, which are used for solving the technical problem that when the existing terminal equipment is switched across systems, a reasonable mode is not provided for an MME (mobility management entity) to identify the switching type of the terminal equipment, so that the service processing process is complicated.

In a first aspect, the present application provides an implementation method for simplifying a handover procedure, where when a terminal device is handed over from a source base station to a target base station, the method includes:

the network equipment receives a front-transmission reallocation request message; wherein, the Indication flag fields of the forward retransmission request message carry first Indication information;

and the network equipment determines the core network equipment corresponding to the source base station according to the first indication information.

In an optional implementation manner, the first Indication information is carried in spare bits of the Indication Flags field.

In an optional embodiment, when the first indication information is a first value, the core network device is indicated to be an access and mobility management function AMF; and when the first indication information is a second value, indicating the core network equipment as a Mobility Management Entity (MME).

In an alternative embodiment, the method further comprises:

the network equipment determines the switching type of the terminal equipment according to the first indication information;

and filling the designated field when sending the switching request message to the target side base station according to the switching type.

In a second aspect, the present application further provides a network device, where when a terminal device is handed over from a source base station to a target base station, the network device includes:

a transceiver for receiving a forward-transmission reallocation request message; wherein, the Indication flag fields of the forward redistribution request message carry first Indication information;

and the processor is used for determining the core network equipment corresponding to the source base station according to the first indication information.

In an optional implementation manner, the first Indication information is carried in a spare bit of the Indication Flags field.

In an optional implementation, the network device further includes:

the processor is further configured to determine a handover type of the terminal device according to the first indication information; and filling the designated field when sending the switching request message to the target side base station according to the switching type.

In a third aspect, a network device is provided, which includes: the method includes a memory, a processor, and an implementation program stored in the memory and executable on the processor for simplifying a handover procedure, where the implementation program for simplifying a handover procedure implements the steps of the implementation method for simplifying a handover procedure described in the first aspect and any one of the possible implementation manners of the first aspect when executed by the processor.

In a fourth aspect, a computer-readable storage medium is provided, where an implementation program for simplifying a handover procedure is stored, and when executed by a processor, the implementation program for simplifying the handover procedure implements the steps of the implementation method for simplifying the handover procedure described in the first aspect and any one of the possible implementation manners of the first aspect.

The technical scheme provided by the embodiment disclosed by the application at least has the following beneficial effects:

when the method provided by the embodiment of the application carries an Indication message in an Indication flag field of a forward reallocation request message to indicate the switching of the terminal equipment, the core network equipment corresponding to the source base station can clearly and definitely determine whether the terminal equipment is in a 5G network or a 4G network before switching according to the type of the core network equipment, and further can determine whether the switching type of the terminal equipment is switched from 5G to 4G or between 4G according to the combination of the actually switched target base stations. The method can clearly and definitely determine the network system to which the source base station belongs before the terminal equipment is switched; in addition, because the conditions of the source base station and the target base station can be respectively known through the method, the switching type to be known by the target base station can be formed in a more flexible mode, and the formed switching type can also better accord with the actual switching condition.

In the embodiment of the application, because the spare bit is adopted to carry the indication information, no new message or field is required to be added, and the scheme can be realized by using the existing reserved field, the modification content is less on the basis of the original implementation mode, and the scheme has better compatibility with the existing implementation scheme.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

Fig. 1 is a schematic structural diagram of a network device suitable for use in the method provided in the embodiment of the present application;

fig. 2 is a flowchart of an implementation method for simplifying a handover procedure according to an embodiment of the present application;

fig. 3 is a flowchart illustrating a method for implementing handover decision of a terminal device from an NG-RAN to an E-UTRAN according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of another network device according to an embodiment of the present application.

Detailed Description

Because the technical solution provided in the embodiment of the present application is applied to a system switching scenario, the technical solution is applicable to a scenario in which communication systems of different communication systems coexist, and please refer to fig. 1, which is a schematic diagram of an application scenario applicable in the embodiment of the present application, or a schematic diagram of a network architecture applicable in the embodiment of the present application. The network architecture includes a source network device, a target network device and a terminal device, where the source network device refers to a network device accessed by the terminal device before handover, the target network device refers to a network device accessed by the terminal device after handover, and the source network device and the target network device use different Radio Access Technologies (RATs). Or it may be understood that the source network device and the target network device are network devices in communication systems of different communication systems. Therefore, the technical scheme provided by the embodiment of the application can support the terminal equipment to switch among the communication systems of different communication systems.

For example, the terminal device may switch between the 5G communication system and the 4G communication system, the source network device may be a network device in the 5G communication system, and the target network device may be a network device in the 4G communication system. Or the other way around, that is, the source network device may be a network device in the 4G communication system, and the target network device may be a network device in the 5G communication system. It should be understood that the 5G communication system may also be referred to as a 5G system for short, and the 4G communication system may also be referred to as a 4G system for short, in the 5G communication system, a core network connected to a network device is referred to as a fifth generation core (5 th generation core,5 gc), and in the 4G communication system, a core network connected to a network device is referred to as an Evolved Packet Core (EPC).

It should be understood that fig. 1 is described by taking an example of switching a terminal device between a 5G communication system and a 4G communication system, but this is only an example and does not constitute a limitation to the present application. Likewise, the switching scenario in the embodiment of the present application is not limited to the switching scenario described in fig. 1.

Some terms in the embodiments of the present application are explained below to facilitate understanding by those skilled in the art.

1) The terminal equipment has a wireless transceiving function, can be deployed on land and comprises an indoor or outdoor, handheld, wearable or vehicle-mounted terminal; can also be deployed on the water surface (such as a ship and the like); the terminal device may be a mobile phone (mobile phone), a tablet (Pad), a computer with wireless transceiving function, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving, a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid, a wireless terminal in transportation security, a wireless terminal in smart city (smart city), a wireless terminal in remote terminal, etc., and the like, and the application may be implemented in a remote field, which is also referred to as a UE (remote field application).

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable equipment can also be called wearable smart device or intelligent wearable equipment etc. is the general term of using wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device has full functions and large size, and can realize complete or partial functions without depending on a smart phone, for example: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets, smart helmets, smart jewelry and the like for monitoring physical signs.

The terminal device in the embodiment of the present application may also be an on-board module, an on-board component, an on-board chip, or an on-board unit that is built in the vehicle as one or more components or units, and the vehicle may implement the method of the present application through the built-in on-board module, the built-in on-board component, the built-in on-board chip, or the built-in on-board unit.

2) A network device, also called an access network device, is a device in a network for accessing a terminal device to a wireless network. The network device may be a node in a radio access network, which may also be referred to as a base station, and may also be referred to as a Radio Access Network (RAN) node (or device). The network device may be configured to interconvert received air frames and Internet Protocol (IP) packets as a router between the terminal device and the rest of the access network, which may include an IP network. The network device may also coordinate attribute management for the air interface. The network device may include an evolved Node B (NodeB or eNB or e-NodeB) in a Long Term Evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-a), such as a conventional macro base station eNB and a micro base station eNB in a heterogeneous network scenario, or may also include a next generation Node B (gNB) in a fifth generation mobile communication technology (5 g) New Radio (NR) system, or may also include a radio network controller (radio network controller, RNC), a Node B (NB), a Base Station Controller (BSC), a base transceiver station (base transceiver station, BTS), a transmission point (transceiver station, TRP), a home base station (e.g., a base station, or a base station), a base transceiver station (base transceiver station, BTS), a transmission point (transceiver station, BTS), a base transceiver station (access point, AP), a radio network Access Point (AP), a wireless access point (BBU), or a wireless access point (AP, AP), or a wireless access point (BBU). In a scenario of separate deployment of an access network device including a CU and a DU, the CU supports Radio Resource Control (RRC), packet Data Convergence Protocol (PDCP), service Data Adaptation Protocol (SDAP), and other protocols; the DU mainly supports a Radio Link Control (RLC), a Medium Access Control (MAC) and a physical layer protocol.

3) It should be noted that the terms "system" and "network" in the embodiments of the present application may be used interchangeably. The "plurality" means two or more, and in view of this, the "plurality" may also be understood as "at least two" in the embodiments of the present application. "at least one" is to be understood as meaning one or more, for example one, two or more. For example, the inclusion of at least one means that one, two or more are included, and does not limit which is included. For example, including at least one of A, B, and C, then inclusion may be A, B, C, A and B, A and C, B and C, or A and B and C. Similarly, the understanding of the description of "at least one" and the like is similar. "and/or" describes the association relationship of the associated object, indicating that there may be three relationships, for example, a and/or B, which may indicate: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" generally indicates that the preceding and following related objects are in an "or" relationship, unless otherwise specified.

Unless stated to the contrary, the embodiments of the present application refer to the ordinal numbers "first", "second", etc., for distinguishing between a plurality of objects, and do not define the order, sequence, priority, or importance of the plurality of objects, and the descriptions of "first", "second", etc., do not define that the objects are necessarily different.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

Based on the structure of the network device, the method and apparatus provided by the embodiments of the present application are further described in detail below with reference to the accompanying drawings and specific application scenarios:

example one

As shown in fig. 2, an implementation method for simplifying a handover procedure is provided in an embodiment of the present application, when a terminal device is handed over from a source base station to a target base station, a target base station handover type (5G and 4G handover, and handover between 4G) needs to be notified, because the content to be indicated by the handover type includes two parts, that is, the network system to which the source base station belongs and the network system to which the target base station belongs are indicated, in the embodiment of the present application, the handover type is divided into two parts to complete the indication, the network system (4G or 5G) to which the source base station belongs is indicated by one piece of indication information, and then based on actual implementation of the handover, the network device that completes the handover determines the network system (4G or 5G) to which the target base station belongs. The method can specifically comprise the following implementation steps:

step 201, a network device receives a forward-transmission reallocation request message; wherein, the Indication flag (Indication Flags) field of the forward retransmission request message carries first Indication information;

in order to adjust the structure of the existing Indication Flags field as little as possible and conveniently carry the first Indication information, the first Indication information may be carried in the spare bits of the Indication Flags field.

The specific implementation manner of carrying the first indication information (nwroll) in the field in the embodiment of the present application may be:

if the handover scenario is a handover from 5G to 4G, or a handover between 4G, the corresponding source-side core network device may be an access and mobility management function entity (AMF) or an MME, because the source side and the target side in the handover type are separately indicated in the embodiment of the present application, although the embodiment simply indicates two types of information (the source-side core network is the AMF or the MME), the handover types that can be flexibly formed in combination include a handover from 5G to 4G, a handover from 4G to 5G, and a handover between 4G and 4G; the first indication information may include two values (a first value and a second value) to indicate the two cases specifically corresponding to the two cases of the source-side core network device, respectively; the specific implementation mode can be as follows:

when the first indication information is a first value (may be 0), indicating that the core network device is an AMF; and when the first indication information is a second value (may be 1), indicating that the core network device is an MME. Of course, in the usage scenario, the content indicated by 0 and 1 may be adjusted, and it is not limited that 0 only indicates AMF, and is determined according to the specific indication definition.

Since the existing Indication Flags field includes a plurality of spare bits, the first Indication information (nworle) provided in this embodiment may be defined to be carried in any one of the spare bits. As shown in table 1, the 6 th to 8 th bits of the 12 th byte in the Indication Flags field are all spare bits, so that a value (the value may be set to 0 or 1) corresponding to the first Indication information may be carried in any one of the 6 th to 8 th bits of the 12 th byte. The example shown in table 1 is carried in the 6 th bit, but other Spare (Spare) bits may also be used as the position for carrying the first indication information.

TABLE 1

Of course, if more switching scenarios or source-side core network devices that need to be indicated, for example, the third and fourth scenarios, occur, more bits may be used to carry the first indication information; for example, the spare bit of the 6 th bit and the 7 th bit of the 12 th byte are both used for carrying the first indication information. The corresponding may indicate a 4-case switching scenario.

In a specific usage scenario of this embodiment, the manner of generating the first indication information may be:

if the source side core network device is switched to the 4G by the 5G network, the source side core network device is the AMF, and the corresponding manner of forming the first indication information may be: the AMF may set a bit corresponding to nwroll to 0 on the N26 interface;

if the source side core network device is switched to the 4G by the 5G network, the source side core network device is an MME, and the corresponding manner of forming the first indication information may be: the MME may set the bit corresponding to nwrale to 1 on the N26 interface.

The above is taking the handover of 5G and 4G as an example, and of course, if a specific handover scenario involves more handover networks, according to the method provided in the embodiment of the present application, the source side and the target side related to the handover can be divided into two parts to be respectively obtained, so that the handover type information (information indicating the source side and the target side of the handover) required by the target base station can be conveniently, quickly and flexibly obtained.

Step 202, the network device determines the core network device corresponding to the source base station according to the first indication information.

In the existing terminal device handover process, when sending a handover request message to a target base station in handover, a field of a mandatory handover type (indicating what a handover source and a destination network are respectively) needs to be carried, so a further implementation manner of this embodiment is to determine the handover type based on a source-side core network device and a destination-side core network device, and the specific implementation may be:

a1, the network equipment determines the switching type of the terminal equipment according to the first indication information;

and A2, filling specified fields when the switching request message is sent to the target side base station according to the switching type.

Since the source-side core network device has already been determined based on the

above steps

201 and 202 in this embodiment, the target-side core network device can be easily determined by the existing implementation manner, so the handover type of the terminal device can be conveniently and quickly determined by the above steps A1 and A2, and the specified field is filled to indicate the handover type; for example, the designated field may be a Handover type field in a particular Handover scenario.

And after receiving the front-transmission reallocation request message, the target side MME can quickly and simply clarify the switching type through the newly added field, and then fills a Handover type field when sending the switching request message to the target side base station, wherein the field value is 5GS, the Handover type field is 5GStoEPS, the field value is EPS, and the Handover type field is IntraLTE.

When the method provided by the embodiment of the application carries an Indication message in the Indication flag Indication Flags field of the forward reallocation request message to indicate the terminal device to switch, the core network device corresponding to the source base station can clearly and definitely determine whether the terminal device is in the 5G network or the 4G network before switching according to the type of the core network device, and further can determine whether the switching type of the terminal device is switched from the 5G to the 4G or between the 4G according to the combination of the actually switched target base stations. The method can clearly and definitely determine the network system to which the source base station belongs before the terminal equipment is switched; in addition, because the conditions of the source base station and the target base station can be respectively known through the method, the switching type can be formed in a more flexible mode, and the formed switching type can also better accord with the actual switching condition.

For example, if the terminal device is switched from a Radio Access Network (NG-RAN) to an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN), a specific implementation manner may include the following implementation steps (as shown in fig. 3):

in step 301, the ng-RAN sends a handover request to an access and mobility management function (AMF) network element to request to prepare resources of the target side.

Step 302, the amf sends a request message for obtaining the session context information to a control plane packet data gateway and a session management function (PGW-C + SMF) to request for providing the session context information.

Step 303, the amf sends a forward reallocation request message to the MME, which carries the user context information, and requests resource allocation.

And the Indication flag fields of the forward retransmission request message carry first Indication information indicating the core network equipment corresponding to the source base station.

When the AMF sends the forward reallocation request message, the bit corresponding to nwrite in the Indication Flags field is set to 0 on the N26 interface to indicate the flag field and add a new piece of Indication information (first Indication information).

Step 304, the mme sends a session creation request to a Serving Gateway (SGW) to establish session resources; and receives an SGW reply create session response.

In step 305, the mme sends a handover request to the target eNodeB requesting resource preparation.

As shown in table 1, in this embodiment, after receiving the forward retransmission request message sent by the AMF, the MME may read a value in the 6 th bit of the 12 th byte from the Indication Flags field, and if the value is 0, may determine that the source base station core network device is the AMF. Then, after determining the network system to which the target base station to be switched belongs according to the specific switching situation, the switching type can be determined. In this example, because it is a handover from NG-RAN to E-UTRAN, the corresponding handover type is 5GS to EPS, which the MME carries when sending a message to the target eNodeB.

As shown in fig. 4, based on the foregoing implementation method, an embodiment of the present application further provides a network device corresponding to the foregoing method, where when a terminal device is handed over from a source base station to a target base station, the network device includes:

a transceiver 401 for receiving a forward retransmission request message; wherein, the Indication flag fields of the forward redistribution request message carry first Indication information;

a processor 402, configured to determine, according to the first indication information, a core network device corresponding to the source base station.

In an optional embodiment, when the first indication information is a first value, the core network device is indicated to be an access and mobility management function AMF; and when the first indication information is the second value, indicating the core network equipment as a Mobility Management Entity (MME).

In an optional implementation, the network device further includes:

The division of the modules in the embodiments of the present invention is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present invention may be integrated in one controller, or may exist alone physically, or two or more modules are integrated in one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

Based on the same inventive concept, an embodiment of the present invention provides a network device, please refer to fig. 5, where the computer device includes at least one processor 501 and a memory 502 connected to the at least one processor, a specific connection medium between the processor 501 and the memory 502 is not limited in the embodiment of the present invention, in fig. 5, the processor 501 and the memory 502 are connected through a bus 500 as an example, the bus 500 is represented by a thick line in fig. 5, and a connection manner between other components is only schematically illustrated and not limited. The bus 500 may be divided into an address bus, a data bus, a control bus, etc., and is shown with only one thick line in fig. 5 for ease of illustration, but does not represent only one bus or one type of bus. In addition, the network device further includes a communication interface 503 for receiving a request message or the like sent by another device.

In the embodiment of the present invention, the memory 502 stores instructions executable by the at least one processor 501, and the at least one processor 501 may execute the steps included in the foregoing implementation method for simplifying the handover procedure by executing the instructions stored in the memory 502.

The processor 501 is a control center of the network device, and may connect various parts of the entire network device by using various interfaces and lines, and perform various functions and process data of the network device by operating or executing instructions stored in the memory 502 and calling data stored in the memory 502, thereby performing overall control on the network device.

Optionally, the processor 501 may include one or more processing units, and the processor 501 may integrate an application processor and a modem processor, wherein the application processor mainly handles an operating system, a user interface, an application program, and the like, and the modem processor mainly handles wireless communication. It will be appreciated that the modem processor described above may not be integrated into the processor 501. In some embodiments, processor 501 and memory 502 may be implemented on the same chip, or in some embodiments, they may be implemented separately on separate chips.

The processor 501 may be a general-purpose processor, such as a Central Processing Unit (CPU), digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor.

Memory 502, which is a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. The Memory 502 may include at least one type of storage medium, which may include, for example, a flash Memory, a hard disk, a multimedia card, a card-type Memory, a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a Programmable Read Only Memory (PROM), a Read Only Memory (ROM), a charged Erasable Programmable Read Only Memory (EEPROM), a magnetic Memory, a magnetic disk, an optical disk, and the like. The memory 502 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory 502 of embodiments of the present invention may also be circuitry or any other device capable of performing a storage function to store program instructions and/or data.

By programming the processor 501, the code corresponding to the implementation method for simplifying the switching flow described in the foregoing embodiment may be solidified in the chip, so that the chip can execute the steps of the implementation method for simplifying the switching flow when running.

Based on the same inventive concept, embodiments of the present invention further provide a storage medium storing computer instructions, which, when executed on a computer, cause the computer to perform the steps of the implementation method for simplifying the handover procedure as described above.

In some possible embodiments, various aspects of the implementation method for simplifying the handover procedure provided by the present invention can also be implemented in the form of a program product, which includes program code for causing a control computer device to execute the steps in the implementation method for simplifying the handover procedure according to various exemplary embodiments of the present invention described above in this specification when the program product is run on the control computer device.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

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

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

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

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. An implementation method for simplifying a handover procedure, when a terminal device is handed over from a source base station to a target base station, the method comprising:

the network equipment receives a front-transmission reallocation request message; wherein, an Indication flag Indication Flags field of the forward retransmission request message carries first Indication information, and the first Indication information is used for indicating the core network device corresponding to the source base station;

2. The method of claim 1, wherein the first Indication information is carried in spare bits of the Indication Flags field.

3. The method according to claim 1 or 2, wherein when the first indication information is a first value, indicating that the core network device is an access and mobility management function (AMF); and when the first indication information is the second value, indicating the core network equipment as a Mobility Management Entity (MME).

4. The method of claim 1 or 2, further comprising:

5. A network device, when a terminal device is handed over from a source base station to a target base station, the network device comprising:

a transceiver for receiving a forward-transmission reallocation request message; an Indication flag field of the forward redistribution request message carries first Indication information, where the first Indication information is used to indicate a core network device corresponding to the source base station;

6. The network device of claim 5, wherein the first Indication information is carried in spare bits of the Indication Flags field.

7. The network device according to claim 5 or 6, wherein when the first indication information is a first value, the core network device is indicated to be an access and mobility management function (AMF); and when the first indication information is the second value, indicating the core network equipment as a Mobility Management Entity (MME).

8. The network device of claim 5 or 6, comprising:

9. A network device, characterized in that the network device comprises: a memory, a processor and an implementation program stored on the memory and executable on the processor for simplifying the handover procedure, the implementation program for simplifying the handover procedure implementing the steps of the implementation method for simplifying the handover procedure as claimed in any one of claims 1 to 4 when executed by the processor.

10. A computer-readable storage medium, wherein the computer-readable storage medium stores an implementation program for simplifying a handover procedure, and when the implementation program for simplifying the handover procedure is executed by a processor, the implementation program implements the steps of the implementation method for simplifying the handover procedure according to any one of claims 1 to 4.