CN110049072A

CN110049072A - Session establishing method and equipment

Info

Publication number: CN110049072A
Application number: CN201810037102.9A
Authority: CN
Inventors: 景昊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-01-15
Filing date: 2018-01-15
Publication date: 2019-07-23
Anticipated expiration: 2038-01-15
Also published as: WO2019137547A1; CN110049072B

Abstract

The embodiment of the present application provides session establishing method and equipment, so that when terminal in 5G network by the PDN connection for having multiple PDU sessions with identical DNN to switch to 4G network is established, both ensure that can be anchored in identical control plane functional network element when each PDU session is switched to 4G, each PDN connection after in turn ensuring switching has different APN, so as to realize the control of APN AMBR.Method includes: that terminal sends the first request message for establishing PDU session, wherein first request message includes data network title DNN；The terminal receives the first response message, includes access point name APN in first response message；Terminal sends the second request message for establishing PDN connection to mobile management net element, and second request message includes the APN.

Description

Session establishing method and equipment

Technical field

This application involves field of communication technology more particularly to session establishing method and equipment.

Background technique

With the fast development of wireless communication technique, the 5th generation (Fifth Generation, 5G) mobile communication technology is answered It transports and gives birth to.Initial stage is disposed in network, since the 5G network coverage is insufficient, when user equipment (User Equipment, UE) When position changes, it may occur that UE is in 5G network and forth generation (Forth Generation, 4G) internetwork switching.

Packet data network (packet data network, PDN) connection is established in 4G network needs access point name (access point name, APN) parameter, and protocol Data Unit (protocol data unit, PDU) is created in 5G Data network title (data network name, DNN) and single network slice selection auxiliary information (single are needed when session Network slice selection assistance information, S-NSSAI).In existing standard agreement, APN and DNN is of equal value.

Applicant has found that in the prior art, the PDU session that UE is established in 5G is switched in 4G in the course of the research It, may there are the following problems when PDN connection:

UE may be established in 5G multiple PDU sessions, and these PDU sessions may use identical DNN.And 5G does not have There is the session of the identical DNN of regulation that must select identical session management equipment, therefore, these multiple PDU meetings with identical DNN Words may be anchored in different session management equipment.

But in 4G, in order to carry out APN aggregate maximum bit rate (Aggregated Maximum Bit Rate, AMBR) Control, it is desirable that multiple PDN connections of an identical APN can only be anchored in a session management equipment.If by having in 5G When there are multiple PDU sessions of identical DNN to be switched to multiple PDN connections with identical APN in 4G, meeting conversation continuity In the case where, it will lead to not control APN AMBR in 4G.

Summary of the invention

The embodiment of the present application provides session establishing method, equipment and system, so that having when terminal will be established in 5G network When multiple PDU sessions with identical DNN switch to the PDN connection of 4G network, energy when each PDU session is switched to 4G both ensure that It is enough anchored in control plane functional network element identical with the PDU session, each PDN connection after in turn ensuring switching has difference APN, so as to realize the control of APN AMBR.

In order to achieve the above objectives, the embodiment of the present application provides the following technical solutions:

In a first aspect, a kind of session establishing method is provided, this method comprises: Packet Data Unit PDU is established in terminal transmission First request message of session, wherein first request message includes data network title DNN；The terminal receives first Response message includes the corresponding access point name APN of the PDU session in first response message；The APN is at the end It holds in range uniquely, can be used for the PDU session of terminal described in unique identification；The terminal is built to mobile management net element transmission Second request message of vertical packet data network PDN connection, second request message includes the APN.Based on the application reality The session establishing method for applying example offer, is established in PDU conversation procedure, terminal can obtain one in itself model from network side in terminal Enclose interior unique APN.That is, it is based on the program, and when terminal foundation has multiple PDU sessions of identical DNN, these PDU Session can be switched to the different PDN connection of APN, since the corresponding APN of PDN connection after switching is different, existing There is the problem of APN AMBR is unable to control in technology that can also be resolved.

In a kind of possible design, the APN is carried in protocol configuration option PCO.That is the control of network side APN can be sent to terminal by PCO message by face functional network element, other intermediate equipments in such network can be to avoid solution The information (such as MME in 4G network) is analysed, to reduce to the greatest extent since the scheme in the application leads to equipment in network more Newly.

It further include the PDU session identification of the PDU session in a kind of possible design, in first request message, First response message further includes the PDU session identification；The of PDN connection is established in described send to mobile management net element Before two request messages, the method also includes: the APN is saved in the session context of the PDU session identification instruction In.

In a kind of possible design, the method also includes: instruction information is sent, the instruction information is used to indicate end It holds all PDU sessions established or specific PDU session is subsequent needs to be switched in 4G network.The instruction information can be in session In establishment process, SMF+PGW-C is sent to by terminal or third-party application server, when terminal request establish PDU session, When meeting the instruction information, the process of application scheme is executed；Otherwise, the foundation stream of PDU session is executed according to the prior art Journey.For example, the instruction information may include the mark of terminal, the corresponding session of PDU session and service continuity (session And service continuity, SSC) mode, PDU session corresponding S-NSSAI, DNN at least one.Or the instruction Information can also by terminal carry PDU session establishment request in be sent to SMF+PGW-C.At this point, the instruction information, such as It can be an indicating bit, when position " 1 " is arranged in the indicating bit, indicates that the PDU session of request foundation is subsequent and need to be switched to 4G In network；When indicating bit setting position " 0 " or there is no when the indicating bit, indicate to request the PDU session established is subsequent to be not required to It is switched in 4G network.

In a kind of possible design, second request message establishes PDN connection for requesting, and specifically can be attachment Request is established in request or PDN connection.

Second aspect provides a kind of session establishing method, this method comprises: control plane functional network element, which receives, carrys out self terminal For requesting to establish the first request message of Packet Data Unit PDU session；Wherein, first request message includes data network Network title DNN；Obtain the corresponding access point name APN of the PDU session, wherein the APN within the scope of the terminal only One, the PDU session for terminal described in unique identification.Based on session establishing method provided by the embodiments of the present application, at end End is established in PDU conversation procedure, and terminal can obtain a unique APN in own range from network side.That is, being based on The program, when terminal foundation has multiple PDU sessions of identical DNN, these PDU sessions can be switched to the different PDN of APN Connection, since the corresponding APN of PDN connection after switching is different, APN AMBR is uncontrollable in the prior art asks Topic can be also resolved.

In a kind of possible design, the method also includes: the first response message, first response are sent to terminal It include the APN in message.After control plane functional network element obtains APN, APN can will be obtained in the response of PDU session establishment It is sent to terminal by PCO message, in order to which APN is saved in session context by terminal.

In a kind of possible design, the APN can be as described in the unique parameter modification of numerical value within the scope of the terminal DNN is determined.For example, control plane functional network element can according to PDU session establishment request in S-NSSAI, PDU session ID, One or more modification DNN in the mark of control plane functional network element itself, random number these parameters, thus dynamic generation APN. It particularly, the use of the benefit that random number is modified is that can hide network sensitive information, in order to guarantee the uniqueness of random number, When generating random number can S-NSSAI, PDU session ID, SMF+PGW-C ID and other uniqueness parameters for example when Between the input as nonce generation function such as parameter.After generating random number, control plane functional network element can be used with Modification of the machine number as DNN.The method for having APN to modify in TS23.003 can carry out DNN referring to existing APN method of modifying Modification.Using method described herein, the DNN in the PDU session of terminal request foundation can be mapped as in terminal range Interior unique APN, therefore, when terminal foundation specifically has the different PDU sessions of identical DNN, since the parameter of modification DNN is different Sample, therefore the APN generated is also different.Ensure that the PDN that the different PDU sessions of identical DNN are switched in 4G network connects With different APN when connecing.

In a kind of possible design, control plane functional network element also obtains the subscription data of APN.For example, control plane function Network element can generate the subscription data of APN according to the subscription data of DNN, and the subscription data of the APN of generation is sent to user Data management network element can also be generated the subscription data of APN, concurrently by user data management network element according to the subscription data of DNN Give control plane functional network element.

The third aspect provides a kind of session establishing method, this method comprises: user data management network element receives control plane function The first message that energy network element is sent, which includes DNN；The corresponding access point name APN of the PDU session is obtained, In, the APN is unique within the scope of the terminal, for PDU session described in unique identification.

In a kind of possible design, the APN is true by the unique parameter modification of numerical value within the scope of the terminal DNN It is fixed.For example, further including the PDU session identification and/or single network slice selection auxiliary letter of the PDU session in the first message S-NSSAI is ceased, it is described to obtain the corresponding access point name APN of the PDU session, it specifically includes: user data management network element root According to PDU session establishment request in S-NSSAI, PDU session ID, the mark of control plane functional network element itself, random number this One or more modification DNN in a little parameters, generate APN.It particularly, the use of the benefit that random number is modified is that can hide Network sensitive information, in order to guarantee the uniqueness of random number, when generating random number can S-NSSAI, PDU session ID, The input as nonce generation function such as SMF+PGW-C ID and other uniqueness parameter such as time parameters.It is generating After random number, modification of the random number as DNN is can be used in user data management network element.There is APN modification in TS23.003 Method, DNN can be modified referring to existing APN method of modifying.It, can be by terminal request using method described herein DNN in the PDU session of foundation is mapped as unique APN within the scope of terminal, therefore, when terminal foundation specifically has identical DNN Different PDU sessions when, due to modification DNN parameter it is different, generate APN it is also different.It ensures that identical With different APN when the different PDU sessions of DNN are switched to the PDN connection in 4G network.

In a kind of possible design, user data management network element obtains the subscription data of APN.For example, user data pipe The subscription data of APN can be generated according to the subscription data of DNN by managing network element, or receive the label of APN from control plane functional network element About data, and the APN subscription data is sent to mobile management net element (MME), so that mobile management net element can be according to APN Subscription data authorization corresponding PDN establishment of connection request.When the user data management network element is according to the subscription data of DNN It further include S-NSSAI in the first message, user data management network element is according to S-NSSAI when generating the subscription data of APN The subscription data of the corresponding DNN of the PDU session is obtained with DNN.

Fourth aspect provides a kind of terminal, which has the function of realizing method described in above-mentioned first aspect.It should Function can also execute corresponding software realization by hardware realization by hardware.The hardware or software include one or Multiple modules corresponding with above-mentioned function.

5th aspect, provides a kind of terminal, comprising: processor and memory；The memory is held for storing computer Row instruction, when the terminal operating, which executes the computer executed instructions of memory storage, so that the terminal is held Session establishing method of the row as described in any in above-mentioned first aspect.

6th aspect, provides a kind of computer readable storage medium, finger is stored in the computer readable storage medium It enables, when run on a computer, allows computer to execute session described in any one of above-mentioned first aspect and build Cube method.

7th aspect, provides a kind of computer program product comprising instruction, when run on a computer, so that Computer can execute session establishing method described in any one of above-mentioned first aspect.

Eighth aspect provides a kind of chip system, which includes processor, for supporting that it is above-mentioned that terminal is realized Function involved in aspect.In a kind of possible design, the chip system further includes memory, the memory, is used In the necessary program instruction of preservation terminal and data.The chip system can be made of chip, also may include chip and other Discrete device.

Wherein, fourth aspect technical effect brought by any design method into eighth aspect can be found in first aspect Technical effect brought by middle different designs mode, details are not described herein again.

9th aspect, provides a kind of control plane functional network element, which, which has, realizes above-mentioned second party The function of method described in face.The function can also execute corresponding software realization by hardware realization by hardware.It should Hardware or software include one or more modules corresponding with above-mentioned function.

Tenth aspect, provides a kind of control plane functional network element, comprising: processor and memory；The memory is for depositing Computer executed instructions are stored up, when control plane functional network element operation, which executes the computer of memory storage It executes instruction, so that the control plane functional network element executes the session establishing method as described in any in above-mentioned second aspect.

On the one hand tenth, provides a kind of computer readable storage medium, is stored in the computer readable storage medium Instruction, when run on a computer, allows computer to execute session described in any one of above-mentioned second aspect Method for building up.

12nd aspect, provide a kind of computer program product comprising instruction makes when run on a computer Session establishing method described in any one of above-mentioned second aspect can be executed by obtaining computer.

13rd aspect, provides a kind of chip system, which includes processor, for supporting control plane function Realize function involved in above-mentioned aspect in network element end.In a kind of possible design, the chip system further includes memory, The memory, for saving the necessary program instruction of control plane functional network element and data.The chip system, can be by chip structure At also may include chip and other discrete devices.

Wherein, the 9th aspect technical effect brought by any design method into the 13rd aspect can be found in second party Technical effect brought by different designs mode in face, details are not described herein again.

Fourteenth aspect provides a kind of user data management network element, which has realization above-mentioned The function of method described in the third aspect.The function can also execute corresponding software by hardware realization by hardware It realizes.The hardware or software include one or more modules corresponding with above-mentioned function.

15th aspect, provides a kind of user data management network element, comprising: processor and memory；The memory is used In storage computer executed instructions, when user data management network element operation, which executes being somebody's turn to do for memory storage Computer executed instructions, so that the user data management network element executes the session establishment side as described in any in the above-mentioned third aspect Method.

16th aspect, provides a kind of computer readable storage medium, is stored in the computer readable storage medium Instruction, when run on a computer, allows computer to execute session described in any one of above-mentioned third aspect Method for building up.

17th aspect, provide a kind of computer program product comprising instruction makes when run on a computer Session establishing method described in any one of above-mentioned third aspect can be executed by obtaining computer.

18th aspect, provides a kind of chip system, which includes processor, for supporting user data pipe It manages network element and realizes function involved in above-mentioned aspect.In a kind of possible design, the chip system further includes memory, The memory, for saving the necessary program instruction of the second mobile management entity and data.The chip system, can be by chip It constitutes, also may include chip and other discrete devices.

Wherein, fourteenth aspect technical effect brought by any design method into the 18th aspect can be found in third Technical effect brought by different designs mode in aspect, details are not described herein again.

These aspects or other aspects of the application can more straightforward in the following description.

Detailed description of the invention

Fig. 1 is the schematic diagram of existing 4G network and 5G network interworking framework；

Fig. 2 is the hardware structural diagram of communication equipment provided by the embodiments of the present application；

Fig. 3 is the flow diagram one of session establishing method provided by the embodiments of the present application；

Fig. 4 is the flow diagram two of session establishing method provided by the embodiments of the present application；

Fig. 5 is the structural schematic diagram of device provided by the embodiments of the present application；

Fig. 6 is the structural schematic diagram of control plane functional network element provided by the embodiments of the present application；

Fig. 7 is the structural schematic diagram of user data management network element provided by the embodiments of the present application.

Specific embodiment

In order to facilitate the technical solution for understanding the embodiment of the present application, the brief introduction of the application the relevant technologies is provided first such as Under.

The embodiment of the present invention provides a kind of method of mobile management, can be applied to 4G network and 5G as shown in Figure 1 In network interworking architecture system 100, as shown in Figure 1, including that 4G network and 5G network share user plane functions (user plane Function, UPF) entity+PDN Gateway user plane functions (PDN gateway user plane function, PGW-U) is in fact Body, conversation management functional (session management function, SMF) entity+PDN Gateway control plane function (PDN Gateway control plane function, PGW-C) entity, policy control functions (policy control Function, PCF) entity+"Policy and Charging Rules Function (policy and charging rules function, PCRF) Entity, home signature user server (home subscriber server, HSS)+uniform data management (unified data Management, UDM) entity.Here "+" is indicated to close and be set, and UPF is the user plane functions of 5G network, and PGW-U is corresponding with UPF 4G network gateway customer face function, SMF is the conversation management functional of 5G network, and PGW-C is in 4G network corresponding with SMF Gateway control face function, it is the policy, billing of 4G network corresponding with PCF that PCF, which is the policy control functions of 5G network, PCRF, Rule functional.Here " conjunction is set " refers to that the same equipment is provided simultaneously with the function of two entities.In the embodiment of the present application, for side Just it states, HSS+UDM entity is referred to as user data management network element, PGW-C entity+SMF entity is referred to as control plane function Energy network element, is described collectively herein, is repeated no more below.Certainly, the network equipment after above-mentioned conjunction is set can also use other names Claim, the embodiment of the present application is not especially limited this.

In addition, as shown in Figure 1, can also include mobility management entity in above-mentioned 4G network and 5G network interworking framework In (Mobility Management Entity, MME) and gateway (Serving Gateway, SGW) and 5G network Access and mobile management function to ps domain (Access and Mobility Management Function, AMF) entity.

Wherein, terminal passes through Evolved UTRAN (evolved universal terrestrial Radio access network, E-UTRAN) equipment access 4G network, terminal by Next-Generation networking (next Generation radio access network, NG-RAN) equipment access 5G network.E-UTRAN equipment is connect by S1-MME Mouth is communicated with MME, and E-UTRAN equipment is communicated by S1-U interface with SGW, and MME is communicated by S11 interface with SGW, and MME passes through S6a interface and user data management entity communication, MME by N26 interface and AMF entity communication, SGW by S5-U interface with PGW-U entity+UPF entity communication, for SGW by S5-C interface and PGW-C entity+SMF entity communication, PGW-U entity+UPF is real Body is communicated by N3 interface with NG-RAN equipment, and PGW-U entity+UPF entity is logical by N4 interface and PGW-C entity+SMF entity Letter, PGW-C entity+SMF entity by N7 interface and PCRF entity+PCF entity communication, HSS+UDM entity by N10 interface with PGW-C entity+SMF entity communication, HSS+UDM entity are passed through by N8 interface and AMF entity communication, PCRF entity+PCF entity N15 interface and AMF entity communication, PGW-C entity+SMF entity pass through N2 by N11 interface and AMF entity communication, AMF entity Interface is communicated with NG-RAN equipment, and AMF entity is communicated by N1 interface with terminal.In above-mentioned interworking architecture between MME and AMF N26 interface may and be not present in some scenarios, which can be used for terminal contexts transmitting and handoff procedure.This Whether application will be for there is N26 interface between MME and AMF, the related possible realization of description respectively.

It should be noted that the interface name between each network element in Fig. 1 is an example, interface in specific implementation Name may be other names, and the embodiment of the present application is not especially limited this.

It should be noted that the NG-RAN equipment in 5G network can also be referred to as access device, what which referred to It is the equipment of core network access, such as can be base station, broadband network Service Gateway (broadband network gateway, BNG), convergence switch, non-3 GPP access equipment etc..Base station may include various forms of base stations, such as: macro base station, micro- base It stands in (also referred to as small station), relay station, access point etc., the embodiment of the present application is not especially limited this.

Certainly, there can also be other network elements in 4G network and 5G network, for example, can also include general point in 4G network Group wireless system (general packet radio system, GPRS) business support node (serving GPRS support Node, SGSN) etc., in 5G network can also include authentication service function (authentication server function, AUSF) entity and network slice selection function (network slice selection function, NSSF) entity etc., this Shen Please embodiment this is not especially limited.

Involved terminal (terminal) may include various with wireless communication function in the embodiment of the present application Handheld device, wearable device, calculates equipment or is connected to other processing equipments of radio modem mobile unit；Also It may include subscriber unit (subscriber unit), cellular phone (cellular phone), smart phone (smart Phone), wireless data card, personal digital assistant (personal digital assistant, PDA) computer, plate electricity It is brain, radio modem (modem), handheld device (handheld), laptop computer (laptop computer), wireless Phone (cordless phone) or wireless local loop (wireless local loop, WLL) platform, machine type communication (machine type communication, MTC) terminal, user equipment (user equipment, UE), mobile station (mobile station, MS), terminal device (terminal device) etc..It is mentioned above in the application for convenience of description Equipment be referred to as terminal.

APN:

In 4G network, terminal can provide APN to MME when initiating Packet Service.MME APN according to provided by terminal, Domain name mapping can be carried out by name server (domain name server, DNS), to get session management network element Address (for example, internet protocol address), so that terminal is linked into the corresponding PDN of APN.

DNN:

In 5G network, terminal can provide S-NSSAI and DNN to AMF when initiating PDU session establishment.AMF is based on S-NSSAI, DNN and other information (such as signing information and local carrier policy etc. of terminal) determine session management net The address of member.It is that terminal establishes a PDU session that determined session management network element, which is based on S-NSSAI and DNN,.

Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application is described.Its In, in the description of the present application, unless otherwise indicated, " multiple " refer to two or more.In addition, for the ease of clearly retouching The technical solution for stating the embodiment of the present application, in embodiments herein, use the printed words such as " first ", " second " to function and It acts on essentially identical identical entry or similar item distinguishes.It will be appreciated by those skilled in the art that the words such as " first ", " second " Sample is not defined quantity and execution order, and the printed words such as " first ", " second " also do not limit certain difference.

The network architecture and business scenario of the embodiment of the present application description are to more clearly illustrate that the application is implemented The technical solution of example, does not constitute the restriction for technical solution provided by the embodiments of the present application, those of ordinary skill in the art It is found that technical solution provided by the embodiments of the present application is for similar with the differentiation of the network architecture and the appearance of new business scene The technical issues of, it is equally applicable.

As shown in Fig. 2, node shown in FIG. 1, such as terminal, MME, AMF, SMF entity+PGW-C entity, E-UTRAN or NG- RAN etc. can be realized in a manner of the communication equipment (or system) in Fig. 2.

Fig. 2 show the hardware structural diagram of communication equipment provided by the embodiments of the present application.The communication equipment 200 includes At least one processor 201, communication line 202, memory 203 and at least one communication interface 204.

Processor 201 can be a general central processor (central processing unit, CPU), micro process Device, application-specific integrated circuit (application-specific integrated circuit, ASIC) or one or more A integrated circuit executed for controlling application scheme program.

Communication line 202 may include an access, and information is transmitted between said modules.

Communication interface 204, using the device of any transceiver one kind, for other equipment or communication, such as Ethernet, wireless access network (radio access network, RAN), WLAN (wireless local area Networks, WLAN) etc..

Memory 203 can be read-only memory (read-only memory, ROM) or can store static information and instruction Other kinds of static storage device, random access memory (random access memory, RAM) or letter can be stored The other kinds of dynamic memory of breath and instruction, is also possible to Electrically Erasable Programmable Read-Only Memory (electrically Erasable programmable read-only memory, EEPROM), CD-ROM (compact disc read- Only memory, CD-ROM) or other optical disc storages, optical disc storage (including compression optical disc, laser disc, optical disc, digital universal Optical disc, Blu-ray Disc etc.), magnetic disk storage medium or other magnetic storage apparatus or can be used in carrying or store to have referring to Enable or data structure form desired program code and can by any other medium of computer access, but not limited to this. Memory, which can be, to be individually present, and is connected by communication line 202 with processor.Memory can also be integrated in processor Together.

Wherein, memory 203 be used for store execution application scheme computer executed instructions, and by processor 201 Control executes.Processor 201 is for executing the computer executed instructions stored in memory 203, to realize that the application is following The session establishing method that embodiment provides.

Optionally, the computer executed instructions in the embodiment of the present application can also be referred to as application code, the application Embodiment is not especially limited this.

In the concrete realization, as one embodiment, processor 201 may include one or more CPU, such as in Fig. 2 CPU0 and CPU1.

In the concrete realization, as one embodiment, communication equipment 200 may include multiple processors, such as in Fig. 2 Processor 201 and processor 208.Each of these processors can be monokaryon (single-CPU) processor, It can be multicore (multi-CPU) processor.Here processor can refer to one or more equipment, circuit, and/or use In the processing core of processing data (such as computer program instructions).

In the concrete realization, as one embodiment, communication equipment 200 can also include that output equipment 205 and input are set Standby 206.Output equipment 205 and processor 201 communicate, and can show information in many ways.For example, output equipment 205 can To be liquid crystal display (liquid crystal display, LCD), Light-Emitting Diode (light emitting diode, LED equipment) is shown, cathode-ray tube (cathode ray tube, CRT) shows equipment or projector (projector) etc.. Input equipment 306 and processor 301 communicate, and can receive the input of user in many ways.For example, input equipment 206 can be with It is mouse, keyboard, touch panel device or sensing equipment etc..

Above-mentioned communication equipment 200 can be a common apparatus either special equipment.In the concrete realization, lead to Letter equipment 200 can be desktop computer, portable computer, network server, palm PC (personal digital Assistant, PDA), cell phone, tablet computer, wireless terminal device, embedded device or have setting for similar structures in Fig. 2 It is standby.The embodiment of the present application does not limit the type of communication equipment 200.

Below in conjunction with Fig. 1 and Fig. 2, session establishing method provided by the embodiments of the present application is specifically addressed.

As shown in figure 3, being a kind of session establishing method provided by the embodiments of the present application.In the present embodiment, terminal is first in 5G PDU session is established in network, subsequent since terminal location moves out 5G service range or other reasons, terminal needs to access To 4G network.Specifically, when terminal request establishes a PDU session, control plane functional network element or user data management net The DNN carried in the request of PDU session establishment is mapped as a unique APN for terminal by member, and the APN after mapping is protected It holds in the context of the terminal.In addition, also need the APN after mapping being sent to terminal (such as can for control plane functional network element It is sent in protocol configuration option (protocol configuration option, PCO) message with the APN carrying after mapping To terminal).When terminal needs are switched to 4G from 5G, the APN after mapping is carried, then MME is from user data management network element The context for obtaining terminal, to be determined as the control plane of the terminal service according to the APN of carrying and the context got Functional network element is anchored in control plane functional network element identical with original PDU session when realizing 5G PDU session and being switched to 4G. When terminal is established in 5G network there are multiple PDU sessions with identical DNN, can make to be switched to 4G using the above method When network, both ensure that can be anchored to control plane functional network element identical with original PDU session when each PDU session is switched to 4G On, each PDN connection after in turn ensuring switching has different APN, so as to realize the control of APN AMBR.Specifically may be used To include including: as follows

The mobile management net element of step 301, terminal into first network sends the request of PDU session establishment.

Mobile management net element in the first network for example can be AMF shown in Fig. 3, hereinafter be substituted with AMF Mobile management net element in first network.The PDU session establishment request packet includes S-NSSAI, DNN and PDU session identification (PDU Session ID), the request of PDU session establishment is for requesting network side to be sliced example by a network by S-NSSAI instruction A PDU session is established between the data network that terminal and DNN indicate.

It should be noted that terminal may establish multiple PDU sessions in 5G network, and multiple PDU session may Corresponding identical DNN, and taken by same or different control plane functional network element (SMF+PGW-C i.e. in the present embodiment) Business, the embodiment of the present application are not construed as limiting this.For ease of description, the embodiment of the present application only passes through a control plane function with terminal Network element is established for a PDU session.

The PDU session establishment request that step 302, the receiving terminal AMF are sent, and send session establishment to SMF+PGW-C and ask It asks.

Wherein, session establishment request packet includes S-NSSAI, DNN and the PDU carried in the request of PDU session establishment Session ID。

It should be noted that how AMF determines that the address of SMF+PGW-C is the prior art, the embodiment of the present invention is not limited Fixed, correlation technique can refer to existing standard.

Step 303, SMF+PGW-C execute map operation.

The map operation that SMF+PGW-C is executed includes that the DNN in requesting session establishment is mapped as relative to the terminal For unique APN further include optionally generating the corresponding subscription data of the APN.A kind of corresponding subscription data of generation APN Method be that the corresponding qos parameter of PDU session is mapped as to the PDU session to be switched to the corresponding QoS of the corresponding PDN connection of 4G The corresponding session AMBR of PDU session is such as mapped as the corresponding APN AMBR of PDN connection by parameter, and PDU session is corresponding ARP is mapped as corresponding ARP of PDN connection etc., and is stored in mapped qos parameter as the subscription data of the APN of mapping In HSS+UDM, in order to which when terminal is switched to 4G from 5G, the APN subscription data of mapping is sent to corresponding by HSS+UDM MME.Alternatively, DNN subscription data is directly mapped as corresponding APN subscription data, and the APN subscription data of mapping is stored in In HSS+UDM, in order to which when terminal is switched to 4G from 5G, the APN subscription data of mapping is sent to corresponding by HSS+UDM MME。

Wherein, SMF+PGW-C by session establishment request in DNN be mapped as unique APN for the terminal Method may include a variety of methods, such as:

(1) SMF+PGW-C can be according to the mapping relations of local preconfigured DNN and APN, can according to the mapping relations DNN is mapped as unique APN for the terminal.For example, SMF+PGW-C can locally be pre-configured with DNN, S- The mapping relations (as shown in table 1) of NSSAI and APN or the mapping relations of DNN, S-NSSAI, SMF+PGW-C ID and APN are (such as Shown in table 2).

Table 1

DNN	S-NSSAI	APN
			DNN1	S-NSSAI1	APN1
DNN1	S-NSSAI2	APN2
			DNN2	S-NSSAI1	APN3
DNN2	S-NSSAI2	APN4

Table 2

In a kind of possible implementation, when being directed to a DNN, UE is real in the corresponding network slice of a S-NSSAI When only establishing a PDU session in example, DNN can be mapped as using mapping relations shown in table 1 relative to the end Unique APN for end.When UE establishes the more of identical DNN in the corresponding one or more network slices of a S-NSSAI When a PDU session, DNN can be mapped as to unique APN for the terminal using the mapping relations of table 2.

It should be noted that the mapping relations of Tables 1 and 2 are an example, can specifically there are other mapping relations It realizes, the embodiment of the present invention is not construed as limiting this.

(2) DNN can be mapped as unique APN for the terminal according to default rule by SMF+PGW-C. It is, for example, possible to use unique for terminal parameters to generate APN to modify DNN.One kind is possible to be achieved in that: SMF+PGW-C according to PDU session establishment request in S-NSSAI, PDU session ID, SMF+PGW-C itself mark, with One or more modification DNN in these parameters of machine number, thus dynamic generation APN, such as: DNN PDU session ID1= APN1, DNN@PDU session ID2=APN2, DNN@PDU session ID3=APN3.It is modified using random number Benefit is can to hide network sensitive information, such as SMF+PGW-C ID.SMF+PGW-C firstly generates a random number, in order to protect The uniqueness for demonstrate,proving random number, can be S-NSSAI, PDU session ID, SMF+PGW-C ID, Yi Jiqi when generating random number The input as nonce generation function such as his uniqueness parameter such as time parameter.There are many methods that can protect in the prior art The uniqueness of random number is demonstrate,proved, the embodiment of the present invention does not provide.After generating random number, SMF+PGW-C can be used with Modification of the machine number as DNN, for example, DNN=internet, when random number=1234, DNN can be modified to Internet.1234, or internet@1234.The method for having APN to modify in TS23.003, can modify referring to existing APN Method modifies DNN.In addition, it should be noted that, mapping generate APN be also possible to it is unrelated with DNN, for example, SMF+ PGW-C can be according to PDU session ID and other uniqueness parameter such as time parameters etc. as nonce generation function Input generates APN of the random number as mapping.

In some scenes, the method for above-mentioned (1) (2) can guarantee the institute that the APN that mapping generates is established in the terminal Have in PDU session and does not repeat.It is incited somebody to action it should be noted that (1) (2) two methods can be combined with realization in the concrete realization DNN is mapped as unique APN for the terminal.For example, SMF+PGW-C can be interim according to determining one, table 1 Then APN modifies the interim APN with the SMF+PGW-C ID of itself again, thus the APN after being mapped.

On the other hand, which can also be mapped as the session and be switched to 4G by SMF+PGW-C Session AMBR is such as mapped as corresponding APN AMBR of PDN connection, by PDU meeting by the corresponding qos parameter of PDN connection afterwards The distribution of words keeps priority (allocation retention priority, ARP) to be mapped as the ARP etc. of PDN connection.One The Session AMBR method for being mapped as APN AMBR is that APN AMBR is equal to Session AMBR by kind.Specific It there may also be other mapping methods when realization, for example APN AMBR be set smaller than Session AMBR, the embodiment of the present invention It does not provide.It is equally, a kind of that the corresponding ARP of PDU session is mapped as the method that PDN connects corresponding ARP is by PDN connection pair The ARP answered is set as the corresponding ARP of PDU session, there may also be other mapping methods in specific implementation, for example, PDN is connected Corresponding ARP is set greater than or is less than the corresponding ARP of PDU session, and the embodiment of the present invention does not provide.

Specifically, SMF+PGW-C is also by the APN after mapping and the corresponding qos parameter (optional) of the PDN connection after mapping Association is saved in the context of the terminal.

The method also includes SMF+PGW-C returns to session establishment response to AMF, and the session establishment response includes should The information (such as mark or address) of control plane functional network element.

Step 304, SMF+PGW-C send registration request to HSS+UDM.

Wherein, include the information (such as SMF+PGW-C ID or address information etc.) of SMF+PGW-C in registration request, reflect APN after penetrating believes in order to which the APN association after the information of SMF+PGW-C, mapping is saved in the related of the terminal by HSS+UDM It ceases in (such as session context).If SMF+PGW-C generates the subscription data of APN, in the login request message also Subscription data including the APN, so as to HSS+UDM by the subscription data of APN be saved in the terminal relevant information (such as eventually Hold corresponding subscription data or session context etc.) in.It should be noted that the embodiment of the present application for HSS+UDM how Save relevant information without limitation.

It should be noted that the corresponding QoS ginseng of the mapping and PDU session of DNN to the APN that above-mentioned SMF+PGW-C is executed Counting to PDN and connecting the map operation of corresponding qos parameter can also be executed by HSS+UDM.Specifically, when SMF+PGW-C is executed When above-mentioned map operation is executed by HSS+UDM, step 303 and step 304 can be replaced by following steps A to step C:

Step A, SMF+PGW-C sends registration request to HSS+UDM；

Wherein, registration request includes the mark of terminal, the information of SMF+PGW-C, the session establishment received in step 302 The information such as DNN and optional S-NSSAI in request.

Step B, HSS+UDM receives the registration request that SMF+PGW-C is sent, and executes map operation.

HSS+UDM executes the method that the specific method of map operation executes mapping with SMF+PGW-C in step 303, specifically Process is refering to the associated description in step 303, unlike step 303, HSS+UDM obtain APN subscription data when, HSS+UDM obtains the subscription data of the corresponding DNN of the session according to the PDU session corresponding S-NSSAI and DNN first, then will Relevant parameter in the subscription data of corresponding DNN is mapped as the relevant parameter in APN subscription data, the subscription data packet of DNN Include APN AMBR, ARP etc..

After HSS+UDM has executed map operation, by the APN after the information of SMF+PGW-C, the mapping and APN after mapping Corresponding subscription data association is saved in the relevant information of the terminal, such as can be by the information and mapping of SMF+PGW-C APN afterwards is saved in the session context of the terminal, and the corresponding subscription data of APN after mapping is saved in the label of the UE About in data.

Step C, HSS+UDM sends registration response to SMF+PGW-C.

It wherein, include the subscription data of the APN after mapping and the APN after mapping in registration response, SMF+PGW-C is received After the registration response sent to HSS+UDM, the signing association of the APN after the mapping and APN after mapping is saved in the terminal Relevant information in.

It should be noted that above-mentioned mapping can also be separated in SMF+PGW-C and HSS+UDM execution, for example, SMF+PGW- C is responsible for for DNN being mapped as APN, and HSS+UDM is responsible for generating the subscription data of APN.The embodiment of the present invention does not provide.

Optionally, SMF+PGW-C or HSS+UDM is also received before executing map operation and is come self terminal or third party The instruction information of application server, the instruction information are used to indicate all PDU sessions or specific PDU session of terminal foundation It is subsequent to need to be switched in 4G network.

One kind is possible to be achieved in that, which can be during session establishment, by terminal or third party Application server is sent to SMF+PGW-C, when the PDU session that terminal request is established in step 301, meets the instruction information When, execute the process of the embodiment of the present application；Otherwise, the Establishing process of PDU session is executed according to the prior art.For example, the instruction Information may include the mark of terminal, the corresponding session of PDU session and service continuity (session and service Continuity, SSC) mode, PDU session corresponding S-NSSAI, DNN at least one.For example, when SMF+PGW-C is received When the terminal request of the mark instruction of terminal establishes the PDU session of a data network to DNN instruction, SMF+PGW-C is determined The PDU session is subsequent to be needed to be switched in 4G network, or when SMF+PGW-C determines that the session of established PDU is SSC mode When 1, SMF+PGW-C can determine that the PDU session is subsequent according to the information and need to be switched in 4G network or SMF+PGW-C root It determines that the PDU session is subsequent according to the corresponding S-NSSAI of the session to need to be switched in 4G network.Or the instruction information can also be with It is carried in PDU session establishment request in step 301 by terminal and is sent to SMF+PGW-C.At this point, the instruction information, such as It can be an indicating bit, when position " 1 " is arranged in the indicating bit, indicates that the PDU session of request foundation is subsequent and need to be switched to 4G In network；When indicating bit setting position " 0 " or there is no when the indicating bit, indicate to request the PDU session established is subsequent to be not required to It is switched in 4G network.

Step 305, subsequent PDU session establishment process.

SMF+PGW-C receives the session establishment request that terminal is sent from AMF in step 302, and dialogue-based foundation is asked S-NSSAI and DNN in asking are that terminal establishes a PDU session.The process for establishing PDU session can refer to existing process, It will not be described here.

Step 301 to step 305 for realizing in 5G network terminal establish the process of PDU session, in this process, The embodiment of the present application increase, which is realized, is mapped as the nonoverlapping APN of the terminal scope name for the DNN in PDU session.

APN after mapping is sent to terminal by step 306, SMF+PGW-C.

Specifically, SMF+PGW-C, which can carry the APN after mapping, is sent to terminal in PCO message.It is a kind of possible It is achieved in that, which can carry in the response of PDU session establishment.The APN after mapping is sent using PCO message , can be to avoid in message process to terminal, the network element among SMF+PGW-C and terminal parses additional negative caused by the cell Load.

After terminal receives the APN after mapping, the APN after mapping is stored into session context.Specifically, step In 306, PDU Session ID is also sent jointly to terminal by SMF+PGW-C, and terminal receives the APN and PDU after mapping After Session ID, the APN after mapping is stored into corresponding session context.

Step 307, terminal sends attach request to MME or request is established in PDN connection, in order to which MME reception is described attached Request or PDN connection establish request.

Wherein, the APN after the mapping for carrying in request and receiving in step 306 is established in attach request or PDN connection, should APN after mapping is also that terminal maps generation during PDU session establishment.It should be noted that terminal is sent out in this step It send PDN connection to establish the scene that is likely to occur of request and is that UE is completed attachment flow, but there is still a need for being switched over to PDU session, The PDN connection building process corresponding to PDU session setup immediately after completing attachment flow.

Specifically, step 307 can occur when the position of terminal occurs mobile, for example, being moved to from 5G coverage area The place of only 4G covering, or cause terminal to become from 5G network insertion data network by 4G network due to other are certain When accessing data network.

It further, further include the mark of terminal in step 307 when being attach request, in attach request.It needs to illustrate When, the mark of terminal here can be the information for characterizing user equipment, such as International Mobile Equipment Identity code (International Mobile Subscriber Identity, IMSI), is also possible to the temporary identifier of the UE, such as from 5G The 4G GUTI of globally unique temporary identifier (globally unique temporary identity, GUTI) mapping.This Shen Please embodiment for the mark of terminal concrete form without limitation.

When in step 307 being attach request, step 308 is executed, from the relevant information for obtaining terminal from HSS+UDM；Such as Establish request in fruit step 307 for PDN connection, then it is understood that in the attachment flow before request is established in PDN connection, MME The relevant information of terminal was obtained from HSS+UDM, therefore directly executed step 309.

Step 308, the relevant information that terminal is obtained from HSS+UDM.

Specifically, terminal sends position updating request, the mark of the position updating request carried terminal to HSS+UDM.HSS + UDM obtains the context of terminal according to the mark of terminal, it may for example comprise APN after the information of SMF+PGW-C, mapping and reflects The subscription data etc. of APN after penetrating.It should be noted that the context of above-mentioned terminal may be associated storage, for example, terminal Context in may save multiple session informations and corresponding subscription data, a kind of possible implementation such as 3 institute of table Show:

The subscription data of terminal may be as shown in table 4:

The mark of terminal	The APN of signing
		UE 1	APN1
UE 1	APN 2
		UE 2	APN 4

Wherein, UE is used to refer to the mark of terminal, it should be noted that the APN subscription data in above-mentioned table 3 may also be protected In subscription data in the presence of in, the embodiment of the present invention, for mapping after APN, SMF+PGW-C ID, APN subscription data and The storage form of the information such as the APN of signing is without limitation.When the location updating that HSS+UDM receives MME generation in step 308 is asked After asking, according to terminal iidentification therein, the corresponding context of terminal is obtained.Such as HSS+UDM receives the position of MME generation Update the terminal that request carries is identified as UE1, then HSS+UDM obtains the relevant session context of UE1 and signing information, such as (APN1, SMF+PGW-C 1, APN1 have contracted, the subscription data of APN1), (APN2, SMF+PGW-C 1, APN2 contracted, The subscription data of APN2).The relevant session context of the UE1 that HSS+UDM will acquire and signing information are sent to MME.

Step 309, MME send session updates request to SMF+PGW-C.

Specifically, MME is according to the APN after the mapping received from terminal, and the meeting of the terminal got from HSS+UDM Context and subscription data are talked about, determines the mark of the SMF+PGW-C of anchoring, and send session more to determining SMF+PGW-C New request.Wherein, session updates request includes the APN after the mapping received from terminal.

If step 307 is attach request, MME selects gateway (serving gateway, S- according to the position UE GW).MME sends session updates request to the SMF+PGW-C of the anchoring via S-GW.Also, it is taken in session updates request The corresponding downlink tunnel information of session with S-GW distribution.Optionally, the APN subscription data that MME will be obtained in step 308 In qos parameter such as APN AMBR be also sent to the SMF+PGW-C of anchoring.The SMF+PGW-C of anchoring is looked into according to the APN received The session context for looking for terminal obtains the corresponding user face tunnel information of the session, IP address and uplink including PGW-U+UPF Tunnel information.The SMF+PGW-C of anchoring notifies the downlink tunnel information of S-GW to give the session corresponding PGW-C+UPF (step It suddenly is the prior art, not drawn in the figure).

In a kind of possible implementation, MME further includes MME true before sending session updates request to SMF+PGW-C Determine the permission whether terminal has session updates.When the signing information that MME is returned according to HSS+UDM, reflecting for terminal transmission is determined APN after penetrating is when having contracted, then MME determines that terminal has the permission of session updates, executes step 309, is sent out to SMF+PGW-C Session updates are sent to request；When the signing information that MME is returned according to HSS+UDM, the APN after determining the mapping that terminal is sent is not sign When about or the signing information of HSS+UDM return does not include the APN after mapping, then MME determines that terminal does not have session updates Permission, process terminate.

Step 310, SMF+PGW-C return to session establishment response to MME.

The uplink tunnel information of the corresponding PGW-U+UPF of the session is sent to S-GW by SMF+PGW-C.And S-GW gives MME replys session establishment response, and the uplink tunnel information of the S-GW of S-GW distribution is sent to MME.

Step 311, follow-up process.

After MME receives the session establishment response of SMF+PGW-C transmission, into follow-up process to complete PDN connection It establishes.

In a kind of possible implementation, if step 307 is attach request, MME handles subsequent attachment flow process, including logical Know that base station is the conversation establishing interface-free resources, and establish the tunnel between base station and S-GW, and result notice will be adhered to terminal. If step 307 is that request is established in PDN connection, follow-up process is PDN establishment of connection process, also includes notifying that base station is the meeting Words creation interface-free resources, and the tunnel between base station and S-GW is established, and the result notice that PDN connection is established is to terminal.It should Subsequent process specifically refers to existing process, and it will not be described here.

Based on session establishing method provided by the embodiments of the present application, is established in PDU conversation procedure in terminal, need SMF+ PGW-C or HSS+UDM generates a unique interim APN for terminal according to DNN, and corresponding according to DNN Subscription data generates the corresponding subscription data of APN after mapping, and relevant information is saved in SMF+PGW-C or HSS+ In UDM.So that when terminal will establish the PDN connection for having multiple PDU sessions with identical DNN to switch to 4G network in 5G network When, both ensure that can be anchored in identical control plane functional network element when each PDU session is switched to 4G, in turn ensure switching Each PDN connection afterwards has different APN, so as to realize the control of APN AMBR.In addition, the solution does not need Existing MME is modified.

Wherein, control plane functional network element (SMF+PGW-C) and user data management network element in above-mentioned steps 301 to 311 (HSS+UDM) movement can the processor 201 in communication equipment 200 as shown in Figure 2 call what is stored in memory 203 to answer It is executed with program code, the embodiment of the present application is not intended to be limited in any this.

It should be noted that mobile management net element AMF and second net of Fig. 3 the embodiment described suitable for first network The scene of N26 interface is not present between mobile management net element MME in network, when between AMF and MME there are when N26 interface, can be with Using method as described in Figure 4.As shown in figure 4, being a kind of session establishing method provided by the embodiments of the present application, including walk as follows It is rapid:

Step 401-406, with step 301-306, embodiment shown in Fig. 3 is specifically referred to, details are not described herein.

When terminal is in idle (IDLE) state, step 407-411 is executed:

Step 407, terminal send tracing section updating request to the mobile management net element (such as MME) of the second network.

It wherein, include the 4G GUTI mapped by 5G-GUTI in tracing section updating request, specific mapping method is with reference to existing There is technology.MME can determine the AMF for terminal service before according to 4G GUTI.

Step 408, context from MME to the requesting terminal AMF.

After step 409, AMF receive the request of MME transmission, PDU session context is obtained to control plane functional network element.

Wherein, the PDU session context includes the information of the APN and corresponding control plane functional entity after mapping.

PDU session context is sent to MME by step 410, AMF.

Step 411, in follow-up process, MME conversates switching according to from the received context of AMF.

Follow-up process is that can refer to existing process, and it will not be described here.

When terminal is in connection (Connected) state, step 412-415 is executed:

Step 412, base station send switching request to AMF.

When base station determines that terminal needs to be switched to 4G, HO request is sent to AMF.

Step 413, with step 409

Step 414, AMF send redirection request (Relocation Request) to MME, and within the message, AMF will Words context is sent to MME.

Step 415, follow-up process.

Subsequent switching flow can be found in the associated description in TS23.502.In switching flow, MME can select SGW, and And it conversates update by SGW notice PGW-C+SMF.

Based on session establishing method provided by the embodiments of the present application, can make when terminal will be established in 5G network have it is more When a PDU session with identical DNN switches to the PDN connection of 4G network, both ensure that can when each PDU session is switched to 4G It is anchored in control plane functional network element identical with the PDU session, each PDN connection after in turn ensuring switching has different APN, so as to realize the control of APN AMBR.

Wherein, the movement of above-mentioned steps S401 control plane functional network element and user data management network element into S415 can be by Processor 201 in communication equipment 200 shown in Fig. 2 calls the application code stored in memory 203 to execute, this Shen Please embodiment this is not intended to be limited in any.

It is above-mentioned that mainly scheme provided by the embodiments of the present application is described from the angle of interaction between each network element.It can With understanding, the entities such as above-mentioned terminal, user data management network element, control plane functional network element, AMF and MME are in order to realize Above-mentioned function, it comprises execute the corresponding hardware configuration of each function and/or software module.Those skilled in the art should be very It is readily appreciated that unit described in conjunction with the examples disclosed in the embodiments of the present disclosure and algorithm steps, the application can be with The combining form of hardware or hardware and computer software is realized.Some function is actually hard with hardware or computer software driving The mode of part executes, specific application and design constraint depending on technical solution.Professional technician can be to each Specific application is to use different methods to achieve the described function, but this realization is it is not considered that exceed the model of the application It encloses.

The embodiment of the present application can be according to above method example to terminal, user data management network element and control plane function network Member carries out the division of functional module, for example, each functional module of each function division can be corresponded to, it can also be by two or two Above function is integrated in a processing module.Above-mentioned integrated module both can take the form of hardware realization, can also be with It is realized in the form of software function module.It should be noted that be to the division of module in the embodiment of the present application it is schematical, Only a kind of logical function partition, there may be another division manner in actual implementation.

For example, Fig. 5 is shown involved by above-described embodiment in the case where to use the integrated each functional module of model split And the structural schematic diagram of device.The device 50 can be terminal, the chip being also possible in terminal, the embodiment of the present application to this not Make specific limit.As shown in figure 5, the device includes: receiving module 501 and sending module 502.

The sending module, for sending the first request message for establishing Packet Data Unit PDU session, wherein described First request message includes data network title DNN；The receiving module 501, for receive the first response message, described first It include access point name APN in response message；Wherein, the APN is determined by the DNN, and unique within the scope of the terminal； Wherein, the APN can be carried in protocol configuration option PCO；The sending module 502 is also used to send out to mobile management net element The second request message for establishing packet data network PDN connection is sent, second request message includes the APN.

It optionally, further include the PDU session identification of the PDU session in first request message, first response Message further includes the PDU session identification；The terminal further include:

Preserving module 503, for the APN to be saved in the session context of the PDU session identification instruction.

Optionally, the sending module, is also used to send instruction information, and the instruction information is used to indicate terminal foundation All PDU sessions or specific PDU session is subsequent needs to be switched in 4G network.

Optionally, second request message is that request is established in attach request or PDN connection.

Wherein, all related contents for each step that above method embodiment is related to can quote corresponding function module Function description, details are not described herein.

In the present embodiment, which can be presented in the form of the integrated each functional module of model split. Here " module " can refer to application-specific integrated circuit (application-specific integrated circuit, ASIC), circuit, executes the processor and memory of one or more softwares or firmware program, integrated logic circuit and/or its He can provide the device of above-mentioned function.In a simple embodiment, those skilled in the art is contemplated that terminal 50 Form shown in Fig. 2 can be used.

For example, processor 201 in Fig. 2 can by calling the computer executed instructions stored in memory 203 so that Terminal 50 executes the session establishing method in above method embodiment.Specifically, receiving module 501, sending module in Fig. 5 502 and preserving module 503 function/realization process can by the processor 201 in Fig. 2 call memory 203 in store Computer executed instructions realize.

Optionally, when the device 50 is chip, then the function of receiving module 501 and sending module 502/realization process is also It can be realized by pin or circuit etc..Optionally, when the device 50 is chip, memory 203 can be in chip Storage unit, such as register, caching.Certainly, when the device 50 is terminal, memory 203 can be being located in terminal The storage unit of chip exterior, the embodiment of the present application are not especially limited this.

Since terminal provided by the embodiments of the present application can be used for executing above-mentioned session establishing method, can be obtained Technical effect can refer to above method embodiment, and details are not described herein.

For example, Fig. 6 shows a kind of control plane function in the case where to use the integrated each functional module of model split The structural schematic diagram of network element 60.The control plane functional network element 60 includes: receiving module 601 and acquisition module 602.The reception mould Block 601, for receiving the first request message for being used to request to establish Packet Data Unit PDU session for carrying out self terminal；Wherein, institute Stating the first request message includes data network title DNN；The acquisition module 602, for obtaining, the PDU session is corresponding to be connect Access point title APN, wherein the APN determines by the DNN, and unique within the scope of the terminal.

The network element further include: sending module 603；The sending module disappears for sending the first response to the terminal It ceases, includes the APN in first response message.Optionally, the APN is carried in protocol configuration option PCO.

Optionally, the APN modifies the DNN by the unique parameter of numerical value within the scope of the terminal and determines.

It optionally, further include that the PDU session identification of the PDU session and/or single network are cut in first request message Piece selects auxiliary information S-NSSAI, and the acquisition module 602 is specifically used for: according to the PDU session identification and/or the S- The NSSAI and DNN, generates the APN；The sending module is also used to described in the transmission of user data management network element The information of APN, the DNN and the control plane functional network element.

It optionally, further include that the PDU session identification of the PDU session and/or single network are cut in first request message Piece selects auxiliary information S-NSSAI, and the acquisition module is specifically used for: by the PDU session identification and/or the S- NSSAI and the DNN are sent to user data management network element；The APN is received from the user data management network element.

Optionally, the receiving module 601 is also used to receive the session updates request from mobile management net element, described It include the APN in session updates request.

Optionally, the receiving module is also used to receive the acquisition terminal session that mobile management net element is sent or more The request of text；The sending module is also used to respond to mobile management net element transmission session context, above and below the session Information and the APN of the text response including the control plane functional network element.

Optionally, the acquiring unit 602, is also used to obtain the subscription data of the APN.For example, according to the DNN's Subscription data generates the subscription data of the APN；The sending module 603 is also used to send the subscription data of the APN Give user data management network element.

In the present embodiment, the control plane functional network element 60 is in the form of using the integrated each functional module of model split To present.Here " module " can refer to specific ASIC, circuit, execute one or more softwares or firmware program processor and Memory, integrated logic circuit and/or other device of above-mentioned function can be provided.In a simple embodiment, ability The technical staff in domain is contemplated that control plane functional network element 60 can use form shown in Fig. 2.

For example, processor 201 in Fig. 2 can by calling the computer executed instructions stored in memory 203 so that Control plane functional network element 60 executes the session establishing method in above method embodiment.Specifically, receiving module 601 in Fig. 6, Function/realization the process for obtaining module 602 and sending module 603 can call memory 203 by the processor 201 in Fig. 2 The computer executed instructions of middle storage are realized.

Since control plane functional network element provided by the embodiments of the present application can be used for executing above-mentioned session establishing method, Can be obtained technical effect can refer to above method embodiment, and details are not described herein.

For example, Fig. 7 shows a kind of user data pipe in the case where to use the integrated each functional module of model split Manage the structural schematic diagram of network element.The user data management network element 70 includes: receiving module 701 and acquisition module 702.The reception Module 701, for receiving the first message for carrying out control plane functional network element；Wherein, the first message includes data network title DNN；The acquisition module 702, for obtaining the corresponding access point name APN of the PDU session, wherein the APN is by described DNN is determining, and unique within the scope of the terminal.

The APN modifies the DNN by the unique parameter of numerical value within the scope of the terminal and determines.For example, described first disappears It further include the PDU session identification and/or single network slice selection auxiliary information S-NSSAI of the PDU session, the acquisition in breath Module 702, specifically for according to S-NSSAI, PDU session ID, control plane functional network element in the request of PDU session establishment One or more modification DNN in itself mark, random number these parameters, generate APN.Particularly, it is carried out using random number The benefit of modification is can to hide network sensitive information, can be S- when generating random number in order to guarantee the uniqueness of random number NSSAI, PDU session ID, SMF+PGW-C ID and other uniqueness parameter such as time parameters etc. are produced as random number The input of raw function.After generating random number, modification of the random number as DNN is can be used in user data management network element. The method for having APN to modify in TS23.003, can modify DNN referring to existing APN method of modifying.Using herein described Method, can by terminal request establish PDU session in DNN be mapped as unique APN within the scope of terminal, therefore, when When terminal foundation specifically has the different PDU sessions of identical DNN, since the parameter of modification DNN is different, the APN generated It is different.It ensures that when the different PDU sessions of identical DNN are switched to the PDN connection in 4G network with different APN.

Optionally, the embodiment of the present application provides a kind of chip system, which includes processor, for supporting end Realize above-mentioned session establishing method in end.In a kind of possible design, which further includes memory.The memory, For saving the necessary program instruction of terminal and data.The chip system can be made of chip, also may include chip and its His discrete device, the embodiment of the present application are not especially limited this.

Optionally, the embodiment of the present application provides a kind of chip system, which includes processor, for supporting control Face functional network element processed realizes above-mentioned session establishing method.In a kind of possible design, which further includes memory. The memory, for saving the necessary program instruction of control plane functional network element and data.The chip system, can be by chip structure At also may include chip and other discrete devices, the embodiment of the present application is not especially limited this.

In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real It is existing.When being realized using software program, can entirely or partly realize in the form of a computer program product.The computer Program product includes one or more computer instructions.On computers load and execute computer program instructions when, all or It partly generates according to process or function described in the embodiment of the present application.The computer can be general purpose computer, dedicated meter Calculation machine, computer network or other programmable devices.The computer instruction can store in computer readable storage medium In, or from a computer readable storage medium to the transmission of another computer readable storage medium, for example, the computer Instruction can pass through wired (such as coaxial cable, optical fiber, number from a web-site, computer, server or data center Word user line (digital subscriber line, DSL)) or wireless (such as infrared, wireless, microwave etc.) mode to another A web-site, computer, server or data center are transmitted.The computer readable storage medium can be computer Any usable medium that can be accessed either includes the numbers such as one or more server, data centers that medium can be used to integrate According to storage equipment.The usable medium can be magnetic medium (for example, floppy disk, hard disk, tape), optical medium (for example, DVD), Or semiconductor medium (such as solid state hard disk (solid state disk, SSD)) etc..

Although the application is described in conjunction with each embodiment herein, however, implementing the application claimed In the process, those skilled in the art are by checking the attached drawing, disclosure and the appended claims, it will be appreciated that and it is real Other variations of the existing open embodiment.In the claims, " comprising " (comprising) word is not excluded for other compositions Part or step, "a" or "an" are not excluded for multiple situations.Claim may be implemented in single processor or other units In several functions enumerating.Mutually different has been recited in mutually different dependent certain measures, it is not intended that these are arranged It applies to combine and generates good effect.

Although the application is described in conjunction with specific features and embodiment, it is clear that, do not departing from this Shen In the case where spirit and scope please, it can be carry out various modifications and is combined.Correspondingly, the specification and drawings are only institute The exemplary illustration for the application that attached claim is defined, and be considered as covered within the scope of the application any and all and repair Change, change, combining or equivalent.Obviously, those skilled in the art the application can be carried out various modification and variations without It is detached from spirit and scope.If in this way, these modifications and variations of the application belong to the claim of this application and its Within the scope of equivalent technologies, then the application is also intended to include these modifications and variations.

Claims

1. a kind of session establishing method, which is characterized in that the described method includes:

Terminal sends the first request message for establishing Packet Data Unit PDU session, wherein first request message includes number According to network name DNN；

The terminal receives the first response message, includes the corresponding Access Point Name of the PDU session in first response message Claim APN；Wherein, the APN is unique within the scope of the terminal；

The terminal sends to mobile management net element and establishes the second request message of packet data network PDN connection, and described second Request message includes the APN.

2. according to method described in claim 1, which is characterized in that the APN is carried in protocol configuration option PCO.

3. method according to claim 1 or 2, which is characterized in that further include the PDU meeting in first request message The PDU session identification of words, first response message further include the PDU session identification；It is sent out described to mobile management net element It send before establishing the second request message of PDN connection, the method also includes:

The APN is saved in the session context of the PDU session identification instruction.

4. method according to claim 1 to 3, which is characterized in that the method also includes:

Instruction information is sent, the instruction information is used to indicate all PDU sessions that terminal is established or specific PDU session is subsequent It needs to be switched in 4G network.

5. method according to claim 1 to 4, which is characterized in that second request message be attach request or Request is established in PDN connection.

6. a kind of session establishing method, which is characterized in that the described method includes:

The first request for being used to request to establish Packet Data Unit PDU session that the reception of control plane functional network element carrys out self terminal disappears Breath；Wherein, first request message includes data network title DNN；

Obtain the corresponding access point name APN of the PDU session, wherein the APN is unique within the scope of the terminal.

7. according to the method described in claim 6, it is characterized in that, the method also includes:

The first response message is sent to the terminal, includes the APN in first response message.

8. according to method of claim 7, which is characterized in that the APN is carried in protocol configuration option PCO.

9. according to method as claimed in claim 6 to 8, which is characterized in that the method also includes:

The control plane functional network element sends the APN, the DNN and the control plane function to user data management network element The information of network element.

10. according to any method of claim 6-9, which is characterized in that the APN by numerical value within the scope of the terminal only One parameter is modified the DNN and is determined.

11. according to any method of claim 6-9, which is characterized in that further include described in first request message The PDU session identification of PDU session and/or single network slice selection auxiliary information S-NSSAI, it is described to obtain the PDU session pair The access point name APN answered, specifically includes:

According to the PDU session identification and/or the S-NSSAI and the DNN, the APN is generated.

12. according to any method of claim 6-9, which is characterized in that further include described in first request message The PDU session identification of PDU session and/or single network slice selection auxiliary information S-NSSAI, it is described to obtain the PDU session pair The access point name APN answered, specifically includes:

The PDU session identification and/or the S-NSSAI and the DNN are sent to user by the control plane functional network element Data management network element；

The control plane functional network element receives the APN from the user data management network element.

13. according to any method of claim 7-12, which is characterized in that the method also includes receiving to come from moving tube The session updates request of network element is managed, includes the APN in the session updates request.

14. according to method of claim 6, which is characterized in that the method also includes:

Receive the request for the acquisition terminal session context that mobile management net element is sent；

Session context response is sent to the mobile management net element, the session context response includes the APN.

15. according to any method of claim 6-14, which is characterized in that the method also includes:

Obtain the subscription data of the APN.

16. according to the method for claim 15, which is characterized in that the subscription data for obtaining the APN, comprising:

According to the subscription data of the DNN, the subscription data of the APN is generated；The method also includes:

The subscription data of the APN is sent to user data management network element.

17. a kind of terminal, which is characterized in that the terminal includes: sending module and receiving module；

The sending module, for sending the first request message for establishing Packet Data Unit PDU session, wherein described first Request message includes data network title DNN；

The receiving module includes that the PDU session is corresponding for receiving the first response message, in first response message Access point name APN；Wherein, the APN is unique within the scope of the terminal；

The sending module is also used to send the second request for establishing packet data network PDN connection to mobile management net element and disappears Breath, second request message includes the APN.

18. terminal according to claim 17, which is characterized in that the APN is carried in protocol configuration option PCO.

19. terminal described in 7 or 18 according to claim 1, which is characterized in that further include described in first request message The PDU session identification of PDU session, first response message further include the PDU session identification；The terminal further include:

Preserving module, for the APN to be saved in the session context of the PDU session identification instruction.

20. any terminal of 7-19 according to claim 1, which is characterized in that the sending module is also used to send instruction Information, the instruction information is used to indicate all PDU sessions of terminal foundation or specific PDU session is subsequent needs to be switched to 4G In network.

21. any terminal of 7-20 according to claim 1, which is characterized in that second request message is attach request Or request is established in PDN connection.

22. a kind of control plane functional network element, which is characterized in that including receiving module and obtain module；

The receiving module, for receiving the first request for being used to request to establish Packet Data Unit PDU session for carrying out self terminal Message；Wherein, first request message includes data network title DNN；

The acquisition module, for obtaining the corresponding access point name APN of the PDU session, wherein the APN is at the end It holds unique in range.

23. control plane functional network element according to claim 22, which is characterized in that the network element further include: sending module；

The sending module includes described in first response message for sending the first response message to the terminal APN。

24. control plane functional network element according to claim 23, which is characterized in that the APN is carried in protocol configuration option In PCO.

25. according to any control plane functional network element of claim 23-24, which is characterized in that the sending module is also used In the information for sending the APN, the DNN and the control plane functional network element to user data management network element.

26. according to any control plane functional network element of claim 22-25, which is characterized in that the APN is by the terminal The unique parameter of numerical value is modified the DNN and is determined in range.

27. according to any control plane functional network element of claim 22-25, which is characterized in that first request message In further include the PDU session PDU session identification and/or single network slice selection auxiliary information S-NSSAI, the acquisition mould Block is specifically used for:

28. according to any control plane functional network element of claim 22-25, which is characterized in that first request message In further include the PDU session PDU session identification and/or single network slice selection auxiliary information S-NSSAI, the acquisition mould Block is specifically used for:

The PDU session identification and/or the S-NSSAI and the DNN are sent to user data management network element；

The APN is received from the user data management network element.

29. according to any control plane functional network element of claim 23-28, which is characterized in that the receiving module is also used It include the APN in the session updates request in receiving the session updates request from mobile management net element.

30. according to the control plane functional network element described in claim 22, which is characterized in that the receiving module is also used to receive shifting The request for the acquisition terminal session context that dynamic managed network element is sent；

The sending module is also used to send session context response to the mobile management net element, and the session context is rung Should include the control plane functional network element information and the APN.

31. according to any control plane functional network element of claim 22-30, which is characterized in that the acquiring unit is also used In the subscription data for obtaining the APN.

32. control plane functional network element according to claim 31, which is characterized in that the acquisition module is specifically used for root According to the subscription data of the DNN, the subscription data of the APN is generated；

The sending module is also used to the subscription data of the APN being sent to user data management network element.

33. a kind of device, which is characterized in that described device includes processor and memory；

The memory is for storing computer executed instructions, and when described device operation, the processor executes the storage The computer executed instructions of device storage, so that described device executes the session as described in any one of claim 1-5 Method for building up.

34. device according to claim 31, which is characterized in that described device includes the core in terminal or the terminal Piece.

35. a kind of control plane functional network element, which is characterized in that the control plane functional network element includes processor and memory；

The memory is for storing computer executed instructions, and when control plane functional network element operation, the processor is held The computer executed instructions of the row memory storage, so that the control plane functional network element executes such as claim 6-16 Any one of described in session establishment method.