CN112020109A

CN112020109A - User terminal context processing method and device

Info

Publication number: CN112020109A
Application number: CN201910469471.XA
Authority: CN
Inventors: 李淑玲
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-12-01
Anticipated expiration: 2039-05-31
Also published as: CN112020109B

Abstract

The embodiment of the invention discloses a method and a device for processing the context of a user terminal, wherein the method comprises the following steps: if the user terminal UE carries auxiliary new air interface base station SgNB information to carry out switching, adding the identification ID information of the UE in a switching message; acquiring the UE according to the ID information in the switching message, and acquiring a target UE context of the UE; and taking the target UE context as the UE context after the UE is switched, so that the switched SgNB does not need to establish a new UE context for the UE and directly multiplexes the target UE context. By adding the ID information of the UE into the switching message, in an MeNB switching scene with unchanged SgNB at the S1 port, the switched SgNB does not need to establish a UE context for the UE, the existing UE context is directly multiplexed, the quantity of the UE context established by the SgNB is reduced, when the number of users is more, the processing capacity of the SgNB and the processing time inside the base station are greatly reduced, the control plane switching time delay is facilitated, and meanwhile, the storage space of the SgNB is saved.

Description

User terminal context processing method and device

Technical Field

The invention relates to the technical field of communication, in particular to a method and a device for processing context of a user terminal.

Background

In the 5G (5th-Generation, fifth Generation mobile communication technology) standard, an NSA (Non-Stand Alone networking) is introduced, and for a terminal having an EN-DC (E-UTRA-NR Dual Connectivity) capability under an Option3 architecture, when Dual Connectivity is established, there are many scenarios in the mobility of the terminal. The Secondary interface at least includes X2 handover and S1 handover, and the coverage indicates that there is MeNB (Master eNB) handover with SgNB (Secondary gbb, Secondary new air interface base station) unchanged, MeNB handover with SgNB changed, SgNB modification or change with MeNB unchanged, and the like. In actual network deployment, X2 port switching is mainly used, but S1 port switching is triggered when a terminal moves without X2 connection, X2 abnormality, or across core networks.

In an R15 protocol in the prior art, for an MeNB handover scenario in which an SgNB of S1 is not changed (S-MeNB (Source-Master eNB, Source-Master eNB) and a T-MeNB (Target-Master eNB ) are both connected to SgNB with X2), a handover preparation message sent by the S-MeNB to the MME (Mobility Management Entity) carries a PCI (Physical Cell Identifier) and frequency point information of an NR (New air interface), the T-MeNB obtains an NRCGI (New Radio Cell Global Identifier, New air interface unit Global Identifier) according to the PCI and frequency point information of an NR Cell in a handover request message, obtains SgNB ID information to be added through the NRCGI, and then triggers an SgNB (Source SgNB) addition process. As shown in fig. 1, after receiving the Addition Request message, the SgNB reestablishes a new UE context (actually, the content is consistent with the content before handover) for the UE (User Equipment), and completes handover of the MeNB across S1 without changing the SgNB.

Due to the incompleteness of the R15 protocol S1 port, in the prior art, for a terminal in a dual connection state, in an MeNB handover scenario in which an SgNB of an S1 port is not changed, the SgNB needs to build a UE context for the UE again, so that 2 UE contexts with the same content exist in the SgNB for the same UE, when the number of users is large, the processing amount of the SgNB and the processing time inside the base station are increased, the handover delay of a control plane is affected, and the storage space of the SgNB is wasted.

Disclosure of Invention

Because the existing method has the above problems, embodiments of the present invention provide a method and an apparatus for processing a context of a user equipment.

In a first aspect, an embodiment of the present invention provides a method for processing a context of a user equipment, including:

if the user terminal UE carries auxiliary new air interface base station SgNB information to carry out switching, adding the identification ID information of the UE in a switching message;

acquiring the UE according to the ID information in the switching message, and acquiring a target UE context of the UE;

and taking the target UE context as the UE context after the UE is switched, so that the switched SgNB does not need to establish a new UE context for the UE and directly multiplexes the target UE context.

Optionally, the handover message comprises a first handover message, a second handover message and an add message;

the first switching message is a switching message of switching a source main base station S-MeNB to a mobility management entity MME;

the second switching message is a switching message for switching the MME to the target main base station T-MeNB;

the adding message is a message of adding SgNB for T-MeNB.

Optionally, the using the target UE context as the UE context after the UE is switched so that the SgNB after the switching directly multiplexes the target UE context without newly creating the UE context for the UE, specifically including:

and if the ID information in the switching message is consistent with the ID information of the UE, taking the target UE context as the UE context after the UE is switched, so that the switched SgNB does not need to establish a UE context for the UE.

Optionally, the UE has established an evolved node b and a new air interface node b dual-connection EN-DC, and has an X2 connection with an SgNB in both the S-MeNB and the T-MeNB.

In a second aspect, an embodiment of the present invention further provides a device for processing a context of a user equipment, including:

the information adding module is used for adding the identification ID information of the UE into a switching message if the fact that the user terminal UE carries the auxiliary new air interface base station SgNB information for switching is judged;

a context obtaining module, configured to obtain the UE according to the ID information in the handover message, and obtain a target UE context of the UE;

and the context multiplexing module is used for taking the target UE context as the UE context after the UE is switched, so that the switched SgNB does not need to establish a new UE context for the UE and directly multiplexes the target UE context.

the adding message is a message of adding SgNB for T-MeNB.

Optionally, the context multiplexing module is specifically configured to, if it is determined that the ID information in the handover message is consistent with the ID information of the UE, use the target UE context as the UE context after the UE handover, so that the SgNB after the handover does not need to newly establish the UE context for the UE.

In a third aspect, an embodiment of the present invention further provides an electronic device, including:

at least one processor; and

at least one memory communicatively coupled to the processor, wherein:

the memory stores program instructions executable by the processor, which when called by the processor are capable of performing the above-described methods.

In a fourth aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium storing a computer program, which causes the computer to execute the above method.

As can be seen from the above technical solution, in the embodiment of the present invention, by adding the ID information of the UE to the handover message, in an MeNB handover scenario in which SgNB of S1 is not changed, the switched SgNB does not need to create a new UE context for the UE, and directly multiplexes the existing UE context, thereby reducing the number of UE contexts established by the SgNB, and when the number of users is large, greatly reducing the throughput of the SgNB and the processing time inside the base station, facilitating the control plane handover delay, and saving the storage space of the SgNB.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic flow chart of a method for processing a context of a ue according to the prior art;

fig. 2 is a flowchart illustrating a method for processing a context of a ue according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating a method for processing a context of a ue according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of a ue context processing apparatus according to an embodiment of the present invention;

fig. 5 is a logic block diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Fig. 2 is a flowchart illustrating a method for processing a context of a user equipment according to this embodiment, where the method includes:

s201, if it is determined that the UE carries SgNB information for handover, adding ID (Identification) information of the UE to a handover message.

Wherein the handover message comprises a first handover message, a second handover message, and an add message.

The first switching message is a switching message of switching from the S-MeNB to the MME.

The second switching message is a switching message for switching the MME to the T-MeNB.

The adding message is a message of adding SgNB for T-MeNB.

The ID information is unique identification information of the UE.

The UE has established EN-DC and has X2 connection with SgNB in both S-MeNB and T-MeNB.

Specifically, when the UE moves from the S-MeNB to the S1 handover in which the T-MeNB carries the SgNB and when the SgNB is not changed, the steps S101-S103 provided in the present embodiment are performed.

S202, the UE is obtained according to the ID information in the switching message, and the target UE context of the UE is obtained.

The target UE context is a UE context corresponding to the current UE, where the UE context is a set of parameters, in particular interface parameters, associated with each other between the UE and the MME.

S203, the target UE context is used as the UE context after the UE is switched, so that the switched SgNB does not need to establish a new UE context for the UE, and the target UE context is directly multiplexed.

Specifically, for a 3GPP R15 protocol version in the prior art, for a UE that has already established EN-DC under an NSA architecture, when an S1 that moves from an S-MeNB to a T-MeNB and carries an SgNB is switched and only when the SgNB is not changed, a new UE context needs to be created; in this embodiment, because the ID information of the UE is added to the handover message, the UE can subsequently acquire the source UE according to the ID information, and the SgNB can continue to reuse the UE context of the source UE without newly establishing the UE context.

In this embodiment, the identifier ID information of the UE is added to the handover message, so that in an MeNB handover scenario where the SgNB of S1 is not changed, the switched SgNB does not need to create a new UE context for the UE, and directly multiplexes the existing UE context, thereby reducing the number of contexts established by the SgNB.

Further, on the basis of the above method embodiment, S203 specifically includes:

For example, as shown in fig. 3, based on the handover message of the existing S1 interface, the unique identifier ID of the UE in the SgNB is added, and the ID is represented as SgNB UE AP ID IE in the specific protocol, where UE (user equipment) represents the user terminal, AP (application) represents the application program, ID (identification) represents the identifier, and IE (information element) represents the information element, and in the specific protocol, the SgNB UE AP ID IE represents the unique identifier of the UE in the SgNB as a whole. Specifically, SgNB UE AP ID IE is added in a switching message of switching from S-MeNB to MME and switching from MME to T-MeNB, and the T-MeNB carries the UE AP ID IE of the user in an adding request message of the SgNB; then after receiving the SgNB Addition Request message (SgNB Addition Request), the SgNB judges whether the SgNB Addition Request message carries the UE AP ID or not, and if not, the UE context is directly newly built; if the UE AP ID is carried, comparing the UE AP ID provided in the SgNB addition request message with the existing UE AP ID, and if the UE AP ID is not consistent with the existing UE AP ID, directly creating a new UE context; and if the UE belongs to the same UE, continuing to reuse the original UE context, so that the SgNB does not need to establish a UE context for the UE again.

It should be noted that, in the entire handover process, the signaling interaction process between the network element interfaces (S1, EN-DC X2, and Uu) is not changed, and only the content of the signaling message of the S1 interface and the implementation of SgNB are affected, which is an improvement of the MeNB handover process across the S1 interface without changing the existing SgNB.

In this embodiment, the existing R15 protocol S1 handover is optimized, for a UE that has already established EN-DC, both the S-MeNB and the T-MeNB are connected to SgNB with X2, and in a handover scenario that spans S1 and carries SgNB, SgNB UE AP ID IE information needs to be added to a handover message of S1, so that for a handover process that spans S1 between menbs without changing SgNB, a target SgNB (i.e., a source SgNB) after handover can reuse an original UE context of the UE.

Fig. 4 shows a schematic structural diagram of a user terminal context processing apparatus provided in this embodiment, where the apparatus includes: an information adding module 401, a context obtaining module 402, and a context multiplexing module 403, wherein:

the information adding module 401 is configured to add identifier ID information of the UE in a handover message if it is determined that the UE carries supplementary new air interface base station SgNB information for handover;

the context acquiring module 402 is configured to acquire the UE according to the ID information in the handover message, and acquire a target UE context of the UE;

the context multiplexing module 403 is configured to use the target UE context as the UE context after the UE is switched, so that the target UE context is directly multiplexed by the switched SgNB without creating a new UE context for the UE.

Specifically, the information adding module 401 adds the identifier ID information of the UE to the handover message if it is determined that the UE carries the secondary new air interface base station SgNB information for handover; the context acquiring module 402 acquires the UE according to the ID information in the handover message, and acquires a target UE context of the UE; the context multiplexing module 403 uses the target UE context as the UE context after the UE is switched, so that the switched SgNB directly multiplexes the target UE context without creating a new UE context for the UE.

Further, on the basis of the above apparatus embodiment, the handover message includes a first handover message, a second handover message, and an add message;

the adding message is a message of adding SgNB for T-MeNB.

Further, on the basis of the above apparatus embodiment, the context multiplexing module 403 is specifically configured to, if it is determined that the ID information in the handover message is consistent with the ID information of the UE, use the target UE context as the UE context after the UE handover, so that the SgNB after the handover does not need to newly establish the UE context for the UE.

Further, on the basis of the above apparatus embodiment, the UE has already established an enb and a new air interface base station dual-connection EN-DC, and has an X2 connection with an SgNB in both an S-MeNB and a T-MeNB.

The user terminal context processing apparatus described in this embodiment may be configured to execute the foregoing method embodiments, and the principle and technical effect are similar, which are not described herein again.

Referring to fig. 5, the electronic device includes: a processor (processor)501, a memory (memory)502, and a bus 503;

wherein,

the processor 501 and the memory 502 are communicated with each other through the bus 503;

the processor 501 is used to call program instructions in the memory 502 to perform the methods provided by the above-described method embodiments.

The present embodiments disclose a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the methods provided by the above-described method embodiments.

The present embodiments provide a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform the methods provided by the method embodiments described above.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

It should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A method for processing context of a user terminal is characterized by comprising the following steps:

2. The ue context processing method of claim 1, wherein the handover message comprises a first handover message, a second handover message, and an add message;

the adding message is a message of adding SgNB for T-MeNB.

3. The UE context processing method according to claim 1, wherein the taking the target UE context as the UE context after the UE is handed over makes the handed-over SgNB directly reuse the target UE context without newly creating a UE context for the UE, specifically comprising:

4. The UE context processing method of claim 2, wherein the UE has established an EN-DC dual connection between an eNB and a new air interface eNB, and has an X2 connection with an SgNB in both an S-MeNB and a T-MeNB.

5. An apparatus for processing context of a user terminal, comprising:

6. The apparatus of claim 5, wherein the handover message comprises a first handover message, a second handover message, and an add message;

the adding message is a message of adding SgNB for T-MeNB.

7. The UE context processing apparatus according to claim 5, wherein the context multiplexing module is specifically configured to, if it is determined that the ID information in the handover message is consistent with the ID information of the UE, use the target UE context as the UE context after the UE handover, so that the SgNB after the handover does not need to newly establish the UE context for the UE.

8. The UE context processing apparatus of claim 6, wherein the UE has established an EN-DC dual connection between an eNB and a new air interface eNB, and has an X2 connection with an SgNB in both an S-MeNB and a T-MeNB.

9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the user terminal context processing method according to any one of claims 1 to 4 when executing the program.

10. A non-transitory computer readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method of context processing for a user terminal according to any of claims 1 to 4.