CN110381548A

CN110381548A - A kind of communication means and relevant device

Info

Publication number: CN110381548A
Application number: CN201810332673.5A
Authority: CN
Inventors: 朱方园; 李岩
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-04-13
Filing date: 2018-04-13
Publication date: 2019-10-25
Anticipated expiration: 2038-04-13
Also published as: CN110381548B

Abstract

The embodiment of the present invention discloses a kind of communication means and relevant device, comprising: the access of first network and mobile management function to ps domain network element receive the login request message from user equipment；The network that obtaining allows user equipment to access is sliced auxiliary information；When first condition meets, indicate that the user equipment initiates session establishment request message, session establishment request message is used to establish the session of the user equipment and first network slice；Wherein, first condition includes: that there are communication interfaces at least one mobility management entity of the access and mobile management function to ps domain network element and the second network；There is the mobility management entity for not supporting the first function, the first function at least one mobility management entity are as follows: execute for user equipment and do not establish public data network connection in attaching process；And the network slice auxiliary information for allowing the user equipment to access includes single network slice auxiliary information of first network slice.Implement the embodiment of the present invention, with saving signaling and network switching time delay can be reduced.

Description

A kind of communication means and relevant device

Technical field

The present embodiments relate to field of communication technology more particularly to a kind of communication means and relevant device.

Background technique

It can be that UE is established that 4G network, which is during user equipment (User Equipment, UE) executes attachment (Attach), Default bearing (establishes session), so that UE can carry out the business such as voice, data traffic in the post-attachment.In 5G network, by It is decoupled in the network element for being responsible for registration and responsible session service, therefore, 5G network is that UE executes registration (Registration) In the process session can't be established for UE.When UE is come in fact by tracing section updating (Tracking Area Update, TAU) process Now from 5G network to when the switching of 4G network, if there is no the session context information of UE in 5G network, the movement in 4G network Property management entity (Mobility Management Entity, MME) will be unable to access and mobile management from 5G network Function (Access and Mobility Management Function, AMF) network element gets the session context letter of UE Breath, so that MME will refuse the TAU of these UE.Therefore, in order to complete the network switching of these UE, these UE refuse TAU in MMB Initial attach request will be initiated to 4G network later, increase the network switching process of these UE, so that causing signaling wave Take, and increases network switching time delay.

Summary of the invention

The embodiment of the invention discloses a kind of communication means and relevant devices, when for saving signaling and reducing network switching Prolong.

First aspect discloses a kind of communication means, and the AMF network element of first network receives the login request message from UE, obtains The network for allowing the UE access is taken to be sliced auxiliary information (Network Slicing Selection Assistance Information, NSSAI), when first condition meets, indicate that the UE initiates session establishment request message, session establishment request Message can establish the session of UE and first network slice.Wherein, first condition may include: the AMF network element and the second network At least one MME there are communication interfaces；There is the MME for not supporting the first function, the first function in this at least one MME are as follows: It is executed for UE and does not establish public data network (Public Data Network, PDN) connection in attaching process；And the UE is allowed to connect The NSSAI entered includes single network slice auxiliary information (Single Network Slice Selection of first network slice Assistance Information, S-NSSAI).Since the session that AMF network element receives UE transmission after having registered for UE is built Vertical request message, the session establishment request message are used to trigger the conversation management functional (Session in core net Management Function, SMF) network element can establish session context for UE, and therefore, the MME in 4G network can pass through 5G AMF network element in network gets the session context information of the UE of SMF network element generation, so that UE can be real by TAU process The now switching from 5G network to 4G network, so as to avoid not establishing session context as 5G network and caused by TAU UE caused by process failure is re-attached to the process of 4G network, with saving signaling and can reduce network switching time delay.

In one embodiment, AMF network element indicates that the UE initiates session establishment request message, can be to send to the UE and use In the instruction information for indicating UE initiation session establishment request message.

In one embodiment, AMF network element sends the finger for being used to indicate the UE and initiating session establishment request message to the UE Show information, can be the instruction information and permission UE for sending to the UE and initiating session establishment request message including being used to indicate the UE The registration received message of the NSSAI of access.

In one embodiment, first network slice may include enhancing mobile broadband (enhanced Mobile Broadband, eMBB) slice.

Second aspect discloses a kind of AMF network element, which includes any for executing first aspect or first aspect The unit of communication means provided by the possible implementation of kind.

The third aspect discloses a kind of AMF network element, which includes processor, memory and transceiver, and memory is used for Program code is stored, processor is for executing program code, and transceiver with other communication equipments for being communicated.Work as processor When executing the program code of memory storage, so that processor executes any side of being able to achieve of first aspect or first aspect Communication means disclosed in formula.

Fourth aspect discloses a kind of readable storage medium storing program for executing, the readable storage medium storing program for executing store AMF network element for execute first The program code of communication means disclosed in any possible implementation of aspect or first aspect.

5th aspect discloses a kind of communication means, and UE receives building for initiating session for the AMF network element from first network The instruction of vertical request message sends session establishment request message, the session establishment request message to the AMF network element according to the instruction The session of the UE and first network is established for core net.Since UE after registration is complete can be according to the instruction immediately to AMF Network element initiates session establishment request message, so that AMF network element can select the corresponding SMF network element of session for UE, to trigger SMF Network element is that UE establishes session, and therefore, the MME in 4G network can get the generation of SMF network element by the AMF network element in 5G network UE session context information, so that UE can realize switching from from 5G network to 4G network by TAU process, so as to Avoid not establishing session context due to 5G network and caused by UE caused by the failure of TAU process be re-attached to 4G network Process, can with saving signaling and reduce network switching time delay.

In one embodiment, the UE that is used to indicate that UE can receive the AMF network element from first network initiates session The instruction information of request message is established, and session establishment request message is sent to the AMF network element according to the instruction information.

In one embodiment, the UE that is used to indicate that UE receives the AMF network element from first network initiates session establishment The instruction information of request message can be from the AMF network element of first network and receive registration received message, which can To include the instruction information and allow the NSSAI of the UE access, wherein allowing the NSSAI of UE access includes first network slice S-NSSAI.

In one embodiment, first network slice may include eMBB slice.

6th aspect discloses a kind of UE, which includes being able to achieve for executing the 5th aspect or the 5th any of aspect The unit of communication means provided by mode.

7th aspect discloses a kind of UE, which includes processor, memory and transceiver, and memory is for storing program generation Code, processor is for executing program code, and transceiver with other communication equipments for being communicated.When processor executes memory When the program code of storage, so that processor executes disclosed in any possible implementation of the 5th aspect or the 5th aspect Communication means.

Eighth aspect discloses a kind of readable storage medium storing program for executing, the readable storage medium storing program for executing store UE for execute the 5th in terms of or The program code of communication means disclosed in any possible implementation of 5th aspect.

9th aspect disclose a kind of communication means, what UE received the AMF network element from first network includes instruction information with The registration received message for allowing the NSSAI of the UE access, allow the UE access NSSAI include first network slice S- NSSAI, the instruction information are used to indicate the MME of the AMF network element and the second network with the presence or absence of communication interface, when the instruction information Indicate that the MME of the AMF network element and the second network there are when communication interface, sends session establishment request message, meeting to the AMF network element Words establish request message for establishing the session of the UE and first network slice.It can be sent out to AMF network element after having been registered due to UE Session establishment request message is played, so that AMF network element can select the corresponding SMF network element of session for UE, to trigger SMF network element and be UE establishes session, and therefore, the MME in 4G network can get the UE's of SMF network element generation by the AMF network element in 5G network Session context information, so that UE can realize switching from from 5G network to 4G network by TAU process, so as to avoid by In 5G network do not establish session context and caused by UE caused by the failure of TAU process be re-attached to the stream of 4G network Journey with saving signaling and can reduce network switching time delay.

In one embodiment, the available configuration information of UE, configuration information can be with are as follows: when the AMF network element that UE is registered With MME there are communication interface, and when the NSSAI of UE access being allowed to include the S-NSSAI that first network is sliced, UE is to being registered AMF network element sends session establishment request message；UE sends session establishment request message to the AMF network element, can be and is matched according to this Confidence, which is ceased to the AMF network element, sends session establishment request message.After UE has been registered, can according to the configuration information of storage to AMF network element initiates session establishment request message, so that AMF network element can select the corresponding SMF network element of session for UE, to trigger SMF network element is that UE establishes session, and therefore, the MME in 4G network can get SMF network element by the AMF network element in 5G network The session context information of the UE of generation, so that UE can realize the switching from 5G network to 4G network by TAU process, thus Can to avoid session context is not established due to 5G network and caused by UE caused by the failure of TAU process be re-attached to 4G The process of network realizes saving signaling and reduces network switching time delay.

In one embodiment, registration received message can also include policy information, and policy information can be with are as follows: when UE is infused The AMF network element and MME of volume are there are communication interface, and when the NSSAI of UE access being allowed to include the S-NSSAI that first network is sliced, UE sends session establishment request message to the AMF network element registered；UE sends session establishment request message to the AMF network element can be with It is that session establishment request message is sent to the AMF network element according to the policy information.It, can be according to AMF network element after UE has been registered The policy information of transmission initiates session establishment request message to AMF network element, so that AMF network element can select session corresponding for UE SMF network element, so that triggering SMF network element is that UE establishes session, therefore, the MME in 4G network can pass through the AMF net in 5G network Member gets the session context information of the UE of SMF network element generation, so that UE can be realized by TAU process from 5G network to 4G The switching of network, so as to avoid not establishing session context as 5G network and caused by the failure of TAU process and cause UE be re-attached to the process of 4G network, with saving signaling and network switching time delay can be reduced.

In one embodiment, first network slice may include eMBB slice.

Tenth aspect discloses a kind of UE, which includes being able to achieve for executing the 9th aspect or the 9th any of aspect The unit of communication means provided by mode.

On the one hand tenth discloses a kind of UE, which includes processor, memory and transceiver, and memory is for storing program Code, processor is for executing program code, and transceiver with other communication equipments for being communicated.When processor executes storage When the program code of device storage, so that processor executes disclosed in any possible implementation of the 9th aspect or the 9th aspect Communication means.

12nd aspect disclose a kind of readable storage medium storing program for executing, the readable storage medium storing program for executing store UE for execute the 9th in terms of Or the program code of communication means disclosed in any possible implementation in terms of the 9th.

13rd aspect discloses a kind of communication means, and the AMF network element of first network receives the login request message from UE, Sending to the UE includes the registration received message for indicating information with the NSSAI for allowing the UE access, receives the session from the UE Establish request message.Wherein, allow the UE access NSSAI include first network slice S-NSSAI, which is used for Indicating the MME of the AMF network element and the second network, there are communication interfaces, and session establishment request message is for establishing the UE and the first net The session of network slice.Since AMF network element will receive the session establishment request message of UE transmission, the session after having registered for UE It is that UE establishes session that request message, which is established, for triggering SMF network element, and therefore, the MME in 4G network can be by 5G network AMF network element gets the session context information of the UE of SMF network element generation, so that UE can be realized by TAU process from 5G net Switching of the network to 4G network, so as to avoid not establishing session context as 5G network and caused by TAU process fail Caused by UE be re-attached to the process of 4G network, with saving signaling and network switching time delay can be reduced.

In one embodiment, which can also include policy information, and policy information can be with are as follows: as the UE There are communication interfaces with MME for the AMF network element registered, and allow the UE access NSSAI include first network slice S- When NSSAI, which sends session establishment request message to the AMF network element registered.

In one embodiment, AMF network element is to policy control functions (Policy Control function, PCF) network element The policy request message for obtaining the policy information is sent, and receives the policy information from the PCF network element.

In one embodiment, first network slice may include eMBB slice.

Fourteenth aspect discloses a kind of AMF network element, which includes for executing the 13rd aspect or the 13rd aspect Any possible implementation provided by communication means unit.

15th aspect discloses a kind of AMF network element, which includes processor, memory and transceiver, and memory is used In storage program code, processor is for executing program code, and transceiver with other communication equipments for being communicated.Work as processing When device executes the program code of memory storage, so that processor executes any possibility of the 13rd aspect or the 13rd aspect Communication means disclosed in implementation.

16th aspect disclose a kind of readable storage medium storing program for executing, which stores AMF network element and be used to execute the The program code of communication means disclosed in any possible implementation of 13 aspects or the 13rd aspect.

Detailed description of the invention

Fig. 1 is that 4G network and the network architecture of 5G network interworking are shown under a kind of non-roaming scene disclosed by the embodiments of the present invention It is intended to；

Fig. 2 is a kind of network architecture schematic diagram disclosed by the embodiments of the present invention；

Fig. 3 is a kind of flow diagram of communication means disclosed by the embodiments of the present invention；

Fig. 4 is the flow diagram of another communication means disclosed by the embodiments of the present invention；

Fig. 5 is the flow diagram of another communication means disclosed by the embodiments of the present invention；

Fig. 6 is a kind of structural schematic diagram of AMF network element disclosed by the embodiments of the present invention；

Fig. 7 is the structural schematic diagram of UE disclosed by the embodiments of the present invention a kind of；

Fig. 8 is the structural schematic diagram of another kind UE disclosed by the embodiments of the present invention；

Fig. 9 is the structural schematic diagram of another kind AMF network element disclosed by the embodiments of the present invention；

Figure 10 is a kind of structural schematic diagram of communication device disclosed by the embodiments of the present invention.

Specific embodiment

The embodiment of the invention discloses a kind of communication means and relevant devices, when for saving signaling and reducing network switching Prolong.It is described in detail separately below.

A kind of communication means and relevant device disclosed in embodiment for a better understanding of the present invention, below first to the present invention The application scenarios that embodiment uses are described.Referring to Fig. 1, Fig. 1 is a kind of non-roaming scene disclosed by the embodiments of the present invention The network architecture schematic diagram of lower 4G network and 5G network interworking.As shown in Figure 1, in 4G network, the general land of UE and evolution Wireless access network (Evolved Universal Terrestrial Radio Access Network, E-UTRAN) directly into Row communication；There are communication interface, which can be S1 interface by E-UTRAN and MME；E-UTRAN and gateway (Serving Gateway, SGW) there are communication interface, which can be S1-U interface；MME exists to communicate with SGW to be connect Mouthful, which can be S11 interface.In 5G network, UE and Next-Generation networking (Next Generation Radio Access Network, NG-RAN) directly communicated；There are communication interfaces with AMF network element by UE, which can Think N1 interface；There are communication interface, which can be N2 interface for NG-RAN and AMF network element.MME in 4G network with For AMF network element in 5G network there are communication interface, which can be N26 interface.User face PDN Gateway in 4G network User plane functions (User Plane Function, UPF) network element in (PDN Gateway User, PGW-U) and 5G network Function is similar, therefore, UPF network element is integrated with PGW-U, i.e. UPF+PGW-U；UPF+PGW-U exists to communicate with SGW to be connect Mouthful, which can be S5-U interface；There are communication interface, which can be N3 by UPF+PGW-U and NG-RAN Interface.Control plane PDN Gateway (PDN Gateway Control, PGW-C) in 4G network and the SMF network element in 5G network Function is similar, therefore, SMF network element is integrated with PGW-C, i.e. SMF+PGW-C；SMF+PGW-C exists to communicate with SGW to be connect Mouthful, which can be S5-C interface；There are communication interface, which can be by SMF+PGW-C and UPF+PGW-U N4 interface；There are communication interface, which can be N11 interface for SMF+PGW-C and AMF network element.Strategy in 4G network With the PCF net in charging rule functions (Policy and Charging Rules Function, PCRF) network element and 5G network The function of member is similar, therefore, PCF network element is integrated with PCRF, i.e. PCF+PCRF；PCF+PCRF is deposited with SMF+PGW-C In communication interface, which can be N7 interface；There are communication interfaces with AMF network element by PCF+PCRF, which can Think N15 interface.Home signature user server (Home Subscriber Server, HSS) and 5G network in 4G network In uniform data management (Unified Data Management, UDM) network element function it is similar, therefore, by HSS and UDM net Member integrates, i.e. HSS+UDM；There are communication interface, which can be S6a interface by HSS+UDM and MME；HSS+ There are communication interface, which can be N10 interface by UDM and SMF+PGW-C；HSS+UDM exists to communicate with AMF network element to be connect Mouthful, which can be N8 interface.

A kind of communication means and relevant device disclosed in embodiment for a better understanding of the present invention, below first to the present invention The network architecture that embodiment uses is described.Referring to Fig. 2, Fig. 2 is that a kind of network architecture disclosed by the embodiments of the present invention is shown It is intended to.As shown in Fig. 2, the network architecture may include UE, (wireless) access net (Radio Access Network, (R) AN) Equipment, UPF network element, data network (Data Network, DN), AMF network element, SMF network element, PCF network element, network slice selection function It can (Network Slice Selection Function, NSSF) network element and UDM network element.UE can be direct with (R) AN equipment It is communicated；There are communication interface, which can be N1 interface for UE and AMF network element；(R) AN equipment is deposited with AMF network element In communication interface, which can be N2 interface；(R) there are communication interfaces with UPF network element for AN equipment, which can Think N3 interface；There are communication interface, which can be N6 interface by UPF network element and DN；Exist between different UPF network elements Communication interface, the communication interface can be N9 interface；There are communication interface, which can be for UPF network element and SMF network element N4 interface；There are communication interface between different AMF network elements, which can be N14 interface；AMF network element is deposited with SMF network element In communication interface, which can be N11 interface；There are communication interfaces with PCF network element for AMF network element, which can Think N15 interface；There are communication interface, which can be N7 interface for SMF network element and PCF network element；AMF network element and NSSF For network element there are communication interface, which can be N22 interface；There are communication interface, the communications with UDM network element for AMF network element Interface can be N8 interface；There are communication interface, which can be N10 interface for SMF network element and UDM network element.

UE can be handheld terminal, laptop, subscriber unit (subscriber unit), cellular phone (cellular phone), smart phone (smart phone), wireless data card, personal digital assistant (Personal Digital Assistant, PDA) computer, plate computer, radio modem (modem), handheld device (handheld), laptop computer (laptop computer), wireless phone (cordless phone) or Wireless Local Loop Road (Wireless Local Loop, WLL) platform, machine type communication (Machine Type Communication, MTC) are eventually End or other equipment that can access network.

It is in communication with each other between UE and (R) AN equipment using certain technology of eating dishes without rice or wine.(R) AN equipment includes that RAN equipment and AN are set Standby, RAN equipment is third generation partner program (3rd Generation Partnership Project, 3GPP) wireless network Network equipment, AN equipment are the access network equipment that non-(non) 3GPP is defined.RAN equipment is mainly responsible for the radio resource pipe for side of eating dishes without rice or wine The functions such as reason, service quality (Quality of Service, QoS) management, data compression and encryption.RAN equipment may include Various forms of base stations, such as: macro base station, micro-base station (also referred to as small station), relay station, access point etc..AN equipment allow UE and It is interconnected between 3GPP core net using non-3 gpp technology, non-3 gpp technology can be Wireless Fidelity (Wireless Fidelity, Wi-Fi), worldwide interoperability for microwave accesses (Worldwide Interoperability for Microwave Access, WiMAX), CDMA (Code Division Multiple Access, CDMA) network etc..

UPF network element is responsible for the forwarding and reception of user data in UE, user data can be received from DN, and pass through (R) AN Equipment is transferred to UE；User data can also be received from UE by (R) AN equipment, and be forwarded to DN.It is provided in UPF network element for UE The transfer resource and scheduling feature of service are controlled by SMF NE management.

AMF network element belongs to core network element, be mainly responsible for signaling processing, such as: access control, mobile management, registration, Go the functions such as registration and gateway selection.In the case that AMF network element provides service for the session in UE, control can be provided for the session The storage resource in face processed, to store session identification and the associated SMF network element ID of session identification etc..

SMF network element is responsible for the selection of user's veil member, and user's veil member redirects, Internet Protocol (Internet Protocol, IP) address distribution, foundation, modification, release and the QoS control of session.

PCF network element provides unified policy framework mainly to control network behavior, provides policing rule and gives control layer network Function, while being responsible for obtaining user signing contract information relevant to strategic decision-making.

NSSF network element is responsible for determining the NSSAI for allowing UE access according to the subscription data of the UE NSSAI requested and UE, It is responsible for determining that network is sliced example, selection target AMF network element.

Based on the network architecture shown in Fig. 2, referring to Fig. 3, Fig. 3 is a kind of communication means disclosed by the embodiments of the present invention Flow diagram.The communication means is suitable for the scene of first network and the second network interworking.For example, first network is 5G net Network, the second network are 4G network.As shown in figure 3, the communication means may comprise steps of.

301, UE sends login request message to AMF network element.

In the present embodiment, when UE needs to access 5G network, UE first sends login request message, the registration to AMF network element Request message can carry the mark of NSSAI (i.e. the Requested NSSAI) and UE of request.For example, UE is sent to AMF network element Login request message can be and login request message is directly sent to AMF network element by RAN equipment, is also possible to first pass through Login request message is sent to initial AMF network element by RAN equipment, then login request message is sent to this by initial AME network element AMF network element.

302, AMF network element obtains the NSSAI for allowing UE access.

In the present embodiment, after AMF network element receives the login request message from UE, core net can be infused for UE Volume process, meanwhile, the available NSSAI (i.e. Allowed NSSAI) for allowing UE access of AMF network element.Wherein, this allows the UE The NSSAI of access may include at least one S-NSSAI, and S-NSSAI is used to identify the type of network slice, for example, S-NSSAI It can be used for identifying eMBB slice.

Wherein, allow the NSSAI of UE access to can be what AMF network element determined, be also possible to what NSSF network element determined.

For example, when allowing the NSSAI of UE access is that AMF network element determines, AMF network element can according to the mark of UE from UDM network element obtains the subscription data of UE, and the subscription data of UE may include the slice type that signing allows UE access, later basis The NSSAI of request and signing allow the slice type of UE access to determine the NSSAI for allowing UE access, for example, by the NSSAI of request The intersection of the slice type of UE access is allowed to be determined as allowing the NSSAI of UE access with signing.

When allowing the NSSAI of UE access is that NSSF network element determines, AMF network element can be by the subscription data of UE and request NSSAI be sent to NSSF network element, NSSF network element allows the slice type of UE access to determine according to the NSSAI and signing of request After the NSSAI for allowing UE access, the NSSAI for allowing UE access is sent to AMF network element.

303, AMF network element judges whether first condition meets, and when judging result meets for first condition, will execute step 304, when judging result is unsatisfactory for for first condition, other steps of register flow path will be executed.

In the present embodiment, after AMF network element gets the NSSAI for allowing UE access, it will judge whether first condition meets, When judging result meets for first condition, will execute step 304 will terminate when judging result is unsatisfactory for for first condition.

Wherein, first condition may include:

There are communication interfaces by least one MME of the AMF network element and the second network；

There is the MME for not supporting the first function, the first function in this at least one MME are as follows: execute in attaching process for UE PDN connection (attach without PDN connectivity) is not established；And

Allow the UE access NSSAI include first network slice S-NSSAI.Wherein, first network slice can wrap EMBB slice is included, also may include magnanimity machine type communication (Massive Machine Type Communications, mMTC) Slice, can also be communicated including super reliable low time delay (Ultra Reliable and Low Latency Communication, URLLC it) is sliced, can also include at least two in eMBB slice, mMTC slice and uRLLC slice.EMBB slice can be used In to provide service including big flows mobile broadband services such as 3D, ultra high-definition videos.MMTC slice can be used for for extensive object Networking service provides service.URLLC slice can be used for be include that unmanned, industrial automation etc. need low time delay, Gao Ke Business by connection provides service, its main feature is that highly reliable, low time delay, high availability.

In the present embodiment, AMF network element judges whether first condition meets, and can be and first judges the AMF network element and the second net At least one MME of network whether there is communication interface.For example, as shown in Figure 1, AMF network element can first judge the AMF network element with At least one MME of second network whether there is N26 interface.As at least one MME for judging the AMF network element and the second network When communication interface is not present, show that first condition is unsatisfactory for.When at least one for judging the AMF network element and the second network There are when communication interface, will continue to judge to judge in this at least one MME with the presence or absence of the MME for not supporting the first function by MME With the presence or absence of the MME for not supporting attach without PDN connectivity function in this at least one MME.For example, The ability information of this at least one MME is configured on AMF network element, AMF network element can be according to the ability information of this at least one MME It carries out judging whether each MME supports attach without PDN connectivity function.Since UE has not when moving Predictability, for example, when the public land mobile network (Public Land Mobile Network, PLMN) for allowing UE to roam When having PLMN-1 and PLMN-2, which both can be from the 4G network insertion of PLMN-1 or PLMN-2, can also be from the AMF network element institute The 4G network insertion of the Home PLMN (Home PLMN, HPLMN) of category, therefore, the AMF network element of current service UE allows the UE The MME ability of the PLMN of access all carries out above-mentioned judgement, even if the AMF network element of current service UE in this way cannot accurately predict the UE From 5G network switching to the 4G network of which PLMN, accurate control also can be realized.When judging result be this at least one When supporting the MME of the first function in MME, show that first condition is unsatisfactory for.When judging result is to exist in this at least one MME When not supporting the MME of the first function, by continue judgement allow the UE access NSSAI whether include first network slice S- NSSAI shows first when judging result is that the NSSAI of the UE access is allowed not include the S-NSSAI of first network slice Part is unsatisfactory for.When judging result is that the NSSAI of the UE access is allowed to include the S-NSSAI of first network slice, show first Condition meets, and will execute step 304.

In the present embodiment, it is also possible to first to judge the AMF network element and at least one MME of the second network with the presence or absence of communicating Interface shows first condition when communication interface is not present at least one MME for judging the AMF network element and the second network It is unsatisfactory for.Allow when judging at least one MME of the AMF network element and the second network there are judgement when communication interface, will be continued The NSSAI of the UE access whether include first network slice S-NSSAI, when judging to allow the NSSAI of the UE access not wrap When including the S-NSSAI of first network slice, show that first condition is unsatisfactory for.When judging to allow the NSSAI of the UE access include When the S-NSSAI of first network slice, it will continue to judge to whether there is the MME for not supporting the first function in this at least one MME, When judging to support the MME of the first function in this at least one MME, show that first condition is unsatisfactory for.When judging this extremely When there is the MME for not supporting the first function in a few MME, show that first condition meets, step 304 will be executed.

In the present embodiment, be also possible to first to judge to allow the UE access NSSAI whether include first network slice S- NSSAI shows first condition not when judging that the NSSAI of the UE access is allowed not include the S-NSSAI of first network slice Meet.When judging that the NSSAI of the UE access is allowed to include the S-NSSAI of first network slice, will continue to judge the AMF net Member whether there is communication interface at least one MME of the second network, when judging at least the one of the AMF network element and the second network When communication interface is not present in a MME, show that first condition is unsatisfactory for.When judging the AMF network element and the second network at least One MME will continue to judge in this at least one MME with the presence or absence of the MME for not supporting the first function there are when communication interface, when When judging to support the MME of the first function in this at least one MME, show that first condition is unsatisfactory for.When judging this at least When there is the MME for not supporting the first function in one MME, show that first condition meets, step 304 will be executed.

In the present embodiment, be also possible to first to judge to allow the UE access NSSAI whether include first network slice S- NSSAI shows first condition not when judging that the NSSAI of the UE access is allowed not include the S-NSSAI of first network slice Meet.When judging that the NSSAI of the UE access is allowed to include the S-NSSAI of first network slice, will continue to judge this at least With the presence or absence of not supporting the MME of the first function in one MME, when judging to support the first function in this at least one MME When MME, show that first condition is unsatisfactory for.It, will when judging to have the MME for not supporting the first function in this at least one MME Continue to judge at least one MME of the AMF network element and the second network with the presence or absence of communication interface, when judge the AMF network element with When communication interface is not present at least one MME of second network, show that first condition is unsatisfactory for.When judging the AMF network element At least one MME with the second network will execute step 304 there are first condition satisfaction when communication interface, is shown.

In the present embodiment, it is also possible to first judge in this at least one MME with the presence or absence of the MME for not supporting the first function, When judging to support the MME of the first function in this at least one MME, show that first condition is unsatisfactory for.When judging this extremely When there is the MME for not supporting the first function in a few MME, will continue judgement allows whether the NSSAI of the UE access includes the The S-NSSAI of one network slice, when judging that the NSSAI of the UE access is allowed not include the S-NSSAI of first network slice, Show that first condition is unsatisfactory for.It, will when judging that the NSSAI of the UE access is allowed to include the S-NSSAI of first network slice Continue to judge at least one MME of the AMF network element and the second network with the presence or absence of communication interface, when judge the AMF network element with When communication interface is not present at least one MME of second network, show that first condition is unsatisfactory for.When judging the AMF network element At least one MME with the second network will execute step 304 there are first condition satisfaction when communication interface, is shown.

In the present embodiment, it is also possible to first judge in this at least one MME with the presence or absence of the MME for not supporting the first function, When judging to support the MME of the first function in this at least one MME, show that first condition is unsatisfactory for.When judging this extremely When there is the MME for not supporting the first function in a few MME, by continue to judge the AMF network element and the second network at least one MME whether there is communication interface, when judging that communication interface is not present at least one MME of the AMF network element and the second network When, show that first condition is unsatisfactory for.When judge at least one MME of the AMF network element and the second network there are when communication interface, By continue judgement allow the UE access NSSAI whether include first network slice S-NSSAI, when judging that the UE is allowed to connect When the NSSAI entered does not include the S-NSSAI of first network slice, show that first condition is unsatisfactory for.When judging that the UE is allowed to connect When the NSSAI entered includes the S-NSSAI of first network slice, show that first condition meets, step 304 will be executed.

304, AMF network element sends the instruction for initiating session establishment request message to UE.

In the present embodiment, when judging that first condition meets, AMF network element will be sent to UE to be used to initiate session establishment and asks The instruction for seeking message can be the instruction information for sending to UE and being used to indicate the UE and initiating session establishment request message.Wherein, should It indicates or instruction information can be what AMF network element during carrying out register flow path for UE was sent, be also possible in register flow path AMF network element is sent after complete.It, can when the instruction information is that AMF network element is sent during carrying out register flow path for UE To be to send to initiate the instruction information of session establishment request message and the NSSAI of permission UE access including being used to indicate UE to UE Register received message.

305, UE sends session establishment request message to AMF network element according to the instruction.

It, will after UE receives the instruction for initiating session establishment request message from AMF network element in the present embodiment Session establishment request message is sent to AMF network element according to the instruction, which can carry first network and cut The S-NSSAI of piece, for example, carrying the S-NSSAI of eMBB slice.When first network slice include eMBB slice, mMTC slice and URLLC slice at least two when, the session establishment request message only carry eMBB slice, mMTC slice or uRLLC slice S-NSSAI.

306, AMF network element is UE according to session establishment request message and first network slice establishes session.

In the present embodiment, after AMF network element receives the session establishment request message from UE, it will be asked according to session establishment It asks message to establish session for UE and first network slice, including sends the step such as session establishment context request message to SMF network element Suddenly.

In the communication means described in Fig. 3, since AMF network element for UE during being registered, determine whether Meet the condition that instruction is sent to UE, when the condition is satisfied, UE register later can according to the instruction of AMF network element immediately to AMF network element initiates session establishment request message, and AMF network element can trigger in core net after receiving the session establishment request message SMF network element can establish session context for UE, therefore, when UE is switched over by TAU process from 5G network to 4G network, 4G MME in network can get the session context information of the UE of SMF network element generation by the AMF network element in 5G network, with Just UE can realize the switching from 5G network to 4G network by TAU process, so as to avoid not establishing due to 5G network Session context and caused by TAU process fail, the process of 4G network is re-attached to so as to avoid UE caused by thus, can With saving signaling and reduce network switching time delay.

Based on the network architecture shown in Fig. 2, referring to Fig. 4, Fig. 4 is another communication means disclosed by the embodiments of the present invention Flow diagram.The communication means is suitable for the scene of first network and the second network interworking.For example, first network is 5G net Network, the second network are 4G network.As shown in figure 4, the communication means may comprise steps of.

401, UE storage configuration information.

In the present embodiment, configuration information can be stored in advance in UE, which can be configures when factory, It can be after dispatching from the factory from network acquisition.The configuration information can be with are as follows: communicates when the AMF network element that UE is registered exists with MME Interface, and when the NSSAI of UE access being allowed to include the S-NSSAI that first network is sliced, UE sends meeting to the AMF network element registered Words establish request message.Wherein, first network slice may include eMBB slice, also may include mMTC slice, can also wrap URLLC slice is included, can also include at least two in eMBB slice, mMTC slice and uRLLC slice.

402, UE sends login request message to AMF network element.

Wherein, step 402 is identical as step 301, and detailed description please refers to step 301, and details are not described herein.

403, it includes the registration received message for indicating information that AMF network element is sent to UE.

In the present embodiment, after AMF network element receives the login request message from UE, obtaining allows UE access NSSAI, and registration received message is sent to UE, which may include instruction information and allows the UE access NSSAI.Wherein, allow the UE access NSSAI include first network slice S-NSSAI, which can indicate AMF The MME of network element and the second network whether there is communication interface.Wherein, the step of obtaining the NSSAI for allowing UE access and step 302 Identical, detailed description please refers to step 302, and details are not described herein.

In one possible implementation, when there are communication interface, registrations between AMF network element and the MME of the second network Received message carries the first instruction information；When communication interface is not present between AMF network element and the MME of the second network, registration receives Message carries second indication information.

In alternatively possible implementation, when there are communication interface, notes between AMF network element and the MME of the second network Volume received message carries above-mentioned instruction information；When communication interface is not present between AMF network element and the MME of the second network, registration is connect Above-mentioned instruction information is not carried by message.

404, when the MME of instruction information instruction AMF network element and the second network is there are when communication interface, UE is according to confidence It ceases to AMF network element and sends session establishment request message.

In the present embodiment, after UE receives the registration received message from AMF network element, when the instruction information indicates AMF There are when communication interface, UE judges whether to meet the condition that configuration information is configured the MME of network element and the second network, and is based on sentencing Disconnected result decides whether to send session establishment request message to AMF network element.For example, UE can first judge whether the instruction information refers to Showing the MME of AMF network element and the second network, there are communication interfaces, when judging result is that the instruction information indicates AMF network element and second When communication interface is not present in the MME of network, show to be unsatisfactory for the condition that configuration information is configured.When judging result is instruction letter There are when communication interface, will continue to judge to allow whether the NSSAI of UE access wraps by the MME of breath instruction AMF network element and the second network Include first network slice S-NSSAI, when judge allow UE access NSSAI do not include first network be sliced S-NSSAI, Show to be unsatisfactory for the condition that configuration information is configured.When the NSSAI for judging permission UE access includes the S- that first network is sliced NSSAI, UE will send session establishment request message to AMF network element.

Similar, the application does not limit the judgement sequence of above-mentioned every content.For example, UE receives registration received message Afterwards, if the NSSAI of the permission UE access carried in registration received message does not include the S-NSSAI of first network slice, show not Meet the condition that configuration information is configured, can directly determine not initiate session establishment immediately.

The session establishment request message can carry the S-NSSAI of first network slice, for example, carrying the S- of eMBB slice NSSAI.When first network slice includes at least two in eMBB slice, mMTC slice and uRLLC slice, the session establishment Request message only carries the S-NSSAI of eMBB slice, mMTC slice or uRLLC slice.

405, AMF network element is UE according to session establishment request message and first network slice establishes session.

Wherein, step 405 is identical as step 306, and detailed description please refers to step 306, and details are not described herein.

In the communication means described in Fig. 4, since UE can be according to the instruction information of AMF network element transmission after having registered Session establishment request message is initiated to AMF network element immediately with the configuration information of UE storage, AMF network element receives session establishment request The SMF network element in core net can be triggered after message to establish session context for UE, therefore, when UE passes through TAU process from 5G When network is switched over to 4G network, it is raw that the MME in 4G network can get SMF network element by the AMF network element in 5G network At UE session context information, so that UE can realize switching from from 5G network to 4G network by TAU process, so as to To avoid session context is not established as 5G network and caused by TAU process fail, so as to avoid UE caused by thus It is re-attached to the process of 4G network, with saving signaling and network switching time delay can be reduced.

Based on the network architecture shown in Fig. 2, referring to Fig. 5, Fig. 5 is another communication means disclosed by the embodiments of the present invention Flow diagram.The communication means is suitable for the scene of first network and the second network interworking.For example, first network is 5G net Network, the second network are 4G network.As shown in figure 5, the communication means may comprise steps of.

501, UE sends login request message to AMF network element.

Wherein, step 501 is identical as step 301, and detailed description please refers to step 301, and details are not described herein.

502, AMF network element is to PCF network element sending strategy request message.

In the present embodiment, after AMF network element receives the login request message from UE, plan can be sent to PCF network element Slightly request message, the strategy acquisition request message can carry the mark of UE.

503, PCF network element sends subscription data request message to UDM network element.

In the present embodiment, after PCF network element receives the policy request message from AMF network element, PCF network element can first be sentenced Whether disconnected PCF network element to UE is transmitted across policy information, when PCF network element is transmitted across policy information to UE, if UE has been saved Policy information, PCF network element can not execute step 503 and step 504-506 below.When PCF network element is transmitted across strategy to UE Information, and when the non-conversation strategy information of UE, or when PCF network element is not transmitted across policy information to UE, can continue to judge PCF net It whether there is policy information in member, when judging that there are can directly execute below when policy information in PCF network element 506 (i.e., it is possible to skipping step 503 and 504).When judging that policy information is not present in PCF network element, can continue to judge The subscription data that whether there is UE in PCF network element, when judging can directly to hold in PCF network element there are when the subscription data of UE The step 505 (i.e., it is possible to skipping step 503 and 504) of row below.When the subscription data for judging that UE is not present in PCF network element When, the subscription data request message for carrying UE and identifying is sent to UDM network element.

In the present embodiment, it can also first continue to judge in PCF network element with the presence or absence of policy information, when judging PCF network element In there are when policy information, can directly execute step 506.When judging that policy information is not present in PCF network element, Ke Yiji Continuous subscription data judge in PCF network element with the presence or absence of UE can be with when judging in PCF network element there are when the subscription data of UE Directly execute step 505.When judging that the subscription data of UE is not present in PCF network element, is sent to UDM network element and carry UE mark Subscription data request message.

In the present embodiment, the subscription data that whether there is UE in PCF network element can also be first judged, when judging PCF network element It is middle there are when the subscription data of UE, can directly execute step 505.When the subscription data for judging that UE is not present in PCF network element When, the subscription data request message for carrying UE and identifying is sent to UDM network element.

, can also be after PCF network element receive the policy request message from AMF network element in the present embodiment, or work as PCF network element is transmitted across policy information to UE, and when the non-conversation strategy information of UE, or when PCF network element is not transmitted across tactful letter to UE When breath, or after judging that policy information is not present in PCF network element, the signing for carrying UE and identifying directly is sent to UDM network element Data request information.

504, UDM network element sends the subscription data of the UE to PCF network element.

It, will be according to the mark after UDM network element receives the subscription data request message from PCF network element in the present embodiment Know the subscription data that UE is sent to PCF network element, the subscription data of UE may include the slice type for the UE access that signing allows, i.e., Subscribed NSSAI。

505, PCF network element is according to subscription data generation strategy information.

In the present embodiment, after PCF network element receives the subscription data from UDM network element, plan is generated according to subscription data Slightly information.The policy information are as follows: when there are communication interfaces with MME for the AMF network element that the UE is registered, and allow the UE access When NSSAI includes the S-NSSAI of first network slice, which sends session establishment request message to the AMF network element registered.Its In, it can also include that uRLLC is sliced that it also may include mMTC slice that first network slice, which may include eMBB slice, can be with Including at least two in eMBB slice, mMTC slice and uRLLC slice.

Wherein, after PCF network element is according to subscription data generation strategy information, can be made with conversation strategy information so as to subsequent With；Can also direct deletion strategy information, to save memory space resource.

In the present embodiment, when PCF network element is according to subscription data generation strategy information, the subscription data packet of UE can be first judged Whether the slice type for the UE access that the signing included allows includes slice type that first network is sliced, when judging above-mentioned signing When the slice type of the UE access of permission includes the slice type of first network slice, according to subscription data generation strategy information. When judging the slice type of UE access of above-mentioned signing permission does not include the slice type that first network is sliced, show to allow The slice type of UE access must not include first network slice, can not establish session at this time for UE and first network slice, because This, can not generation strategy information.

506, PCF network element is to AMF network element sending strategy information.

In the present embodiment, when judging in PCF network element there are after policy information, or according to subscription data generation strategy After information, PCF network element is to AMF network element sending strategy information.

507, it includes the registration received message for indicating information that AMF network element is sent to UE.

In the present embodiment, after AMF network element receives the policy information from PCF network element, registration will be sent to UE and will be received Message.As described above, the registration received message may include instruction information, policy information and the NSSAI for allowing the UE access.If Above-mentioned policy information is had sent to UE before PCF network element, which may include instruction information and allow the UE The NSSAI of access.Wherein, allow the UE access NSSAI include first network slice S-NSSAI, which can be with Indicate that the MME of AMF network element and the second network whether there is communication interface.Wherein, AMF network element obtains the NSSAI for allowing UE access The step of it is identical as step 302, detailed description please refer to step 302, details are not described herein.

508, when the MME of instruction information instruction AMF network element and the second network is there are when communication interface, UE believes according to strategy It ceases to AMF network element and sends session establishment request message.

In the present embodiment, after UE receives the registration received message from AMF network element, when the instruction information indicates AMF There are when communication interface, UE judges whether to meet the condition that policy information is configured the MME of network element and the second network, and is based on sentencing Disconnected result decides whether to send session establishment request message to AMF network element.For example, UE can first judge whether the instruction information refers to Showing the MME of AMF network element and the second network, there are communication interfaces, when judging result is that the instruction information indicates AMF network element and second When communication interface is not present in the MME of network, show to be unsatisfactory for the condition that policy information is configured.When judging result is instruction letter There are when communication interface, will continue to judge to allow whether the NSSAI of UE access wraps by the MME of breath instruction AMF network element and the second network Include first network slice S-NSSAI, when judge allow UE access NSSAI do not include first network be sliced S-NSSAI, Show to be unsatisfactory for the condition that policy information is configured.When the NSSAI for judging permission UE access includes the S- that first network is sliced NSSAI, UE will send session establishment request message to AMF network element.

509, AMF network element is UE according to session establishment request message and first network slice establishes session.

Wherein, step 508 is identical as step 306, and detailed description please refers to step 306, and details are not described herein.

In the communication means described in Fig. 5, since UE can be according to the instruction information of AMF network element transmission after having registered Session establishment request message is initiated to AMF network element immediately with policy information, AMF network element receives after the session establishment request message The SMF network element in core net, which can be triggered, to establish session context for UE, therefore, when UE by TAU process from 5G network to 4G When network switches over, the MME in 4G network can get the UE's of SMF network element generation by the AMF network element in 5G network Session context information, so that UE can realize switching from from 5G network to 4G network by TAU process, so as to avoid by In 5G network do not establish session context and caused by TAU process fail, adhere to again so as to avoid UE caused by thus To the process of 4G network, with saving signaling and network switching time delay can be reduced.

Based on the network architecture shown in Fig. 2, referring to Fig. 6, Fig. 6 is a kind of AMF network element disclosed by the embodiments of the present invention Structural schematic diagram.Wherein, which belongs to first network.As shown in fig. 6, the AMF network element may include:

Communication unit 601, for receiving the login request message from UE；

Acquiring unit 602, for obtaining the NSSAI for allowing the UE access；

Indicating unit 603, for when first condition meets, indicating that the UE initiates session establishment request message, the session Request message is established for establishing the session of the UE and first network slice；

Wherein, first condition may include:

Exist at least one MME and do not support the MME of the first function, the first function can be with are as follows: executes attaching process for UE In do not establish PDN connection；And

The NSSAI for allowing the UE access that acquiring unit 602 obtains includes the S-NSSAI of first network slice.

Wherein, the triggering acquisition of acquiring unit 602 is allowed this after UE reception login request message by communication unit 601 The NSSAI of UE access.

As a kind of possible embodiment, indicating unit 603 indicates that the UE initiates session establishment request message and includes:

The instruction information for being used to indicate the UE and initiating session establishment request message is sent to the UE.

As a kind of possible embodiment, indicating unit 603 is used to indicate the UE to UE transmission and initiates session establishment The instruction information of request message includes:

Registration received message is sent to the UE, which may include the instruction information and allow the UE access NSSAI.

As a kind of possible embodiment, first network slice may include eMBB slice.

In addition, the method and step that the AMF network element of above-mentioned Fig. 3 executes can also be performed in the AMF network element, it can also include executing Other units for the method and step that the AMF network element of above-mentioned Fig. 3 executes, details are not described herein again.

Based on the network architecture shown in Fig. 2, referring to Fig. 7, the structure that Fig. 7 is a kind of UE disclosed by the embodiments of the present invention is shown It is intended to.As shown in fig. 7, the UE may include:

Receiving unit 701, for receive the AMF network element from first network for initiating session establishment request message Instruction；

Transmission unit 702, for indicating that sending session establishment request to AMF network element disappears according to receiving unit 701 is received Breath, session establishment request message are used to establish the session of the UE and first network.

As a kind of possible embodiment, receiving unit 701 receive the AMF network element from first network for initiating The instruction of session establishment request message includes:

Receive the instruction letter for being used to indicate the UE and initiating session establishment request message of the AMF network element from first network Breath；

Transmission unit 702 sends session establishment request message to AMF network element according to the instruction

Session establishment request message is sent to AMF network element according to the instruction information.

As a kind of possible embodiment, receiving unit 701 receives being used to indicate for the AMF network element from first network The UE initiate session establishment request message instruction information include:

Receive the AMF network element from first network registration received message, the registration received message include instruction information and Allow the NSSAI of the UE access, wherein allow the UE access NSSAI include first network slice S-NSSAI.

As a kind of possible embodiment, first network slice may include eMBB slice.

In addition, the method and step that the UE of above-mentioned Fig. 3 is executed can also be performed in the UE, it can also include executing above-mentioned Fig. 3's Other units for the method and step that UE is executed, details are not described herein again.

Based on the network architecture shown in Fig. 2, referring to Fig. 8, Fig. 8 is the structure of another kind UE disclosed by the embodiments of the present invention Schematic diagram.As shown in figure 8, the UE may include:

Receiving unit 801, for receiving the registration received message of the AMF network element from first network, registration receiving disappears Breath includes instruction information and the NSSAI for allowing the UE access, wherein allowing the NSSAI of the UE access includes first network slice S-NSSAI, which is used to indicate the MME of AMF network element and the second network with the presence or absence of communication interface；

Transmission unit 802, for being connect when the received instruction information of receiving unit 801 instruction AMF network element exists to communicate with MME When mouth, session establishment request message is sent to AMF network element, session establishment request message is sliced for establishing the UE and first network Session.

As a kind of possible embodiment, which can also include:

Acquiring unit 803, for obtaining configuration information, which can be with are as follows: when the AMF network element that the UE is registered with There are communication interfaces by MME, and when the NSSAI of the UE access being allowed to include the S-NSSAI of first network slice, the UE is to being registered AMF network element send session establishment request message；

Transmission unit 802 sends session establishment request message to AMF network element

Session establishment request message is sent to AMF network element according to the configuration information that acquiring unit 803 obtains.

Wherein, when the received instruction information of receiving unit 801 indicates that AMF network element and MME there are when communication interface, will be triggered Acquiring unit 803 obtains configuration information.

As a kind of possible embodiment, registration received message can also include policy information, which can be with Are as follows: when there are communication interfaces with MME for the AMF network element that the UE is registered, and the NSSAI of the UE access is allowed to include that first network is cut When the S-NSSAI of piece, which sends session establishment request message to the AMF network element registered；

Session establishment request message is sent to AMF network element according to the policy information.

As a kind of possible embodiment, first network slice may include eMBB slice.

In addition, the method and step that the UE of above-mentioned Fig. 4 and Fig. 5 is executed can also be performed in the UE, it can also include that execution is above-mentioned Other units for the method and step that the UE of Fig. 4 and Fig. 5 is executed, details are not described herein again.

Based on the network architecture shown in Fig. 2, referring to Fig. 9, Fig. 9 is another kind AMF network element disclosed by the embodiments of the present invention Structural schematic diagram.As shown in figure 9, the AMF network element may include:

Receiving unit 901, for receiving the login request message from UE；

Transmission unit 902, for sending registration received message to the UE, which may include instruction information With the NSSAI for allowing the UE access, wherein allow the UE access NSSAI include first network slice S-NSSAI, this refers to Show and information is used to indicate the MME of AMF network element and the second network there are communication interfaces；

Receiving unit 901, is also used to receive the session establishment request message from the UE, and session establishment request message is used for Establish the session of the UE and first network slice.

As a kind of possible embodiment, which can also include policy information, which can With are as follows: when there are communication interfaces with MME for the AMF network element that the UE is registered, and the NSSAI of the UE access is allowed to include first network When the S-NSSAI of slice, which sends session establishment request message to the AMF network element registered.

As a kind of possible embodiment, transmission unit 902 are also used to send to PCF network element and believe for acquisition strategy The policy request message of breath；

Receiving unit 901 is also used to receive the policy information from PCF network element.

Wherein, after receiving unit 901 receives the login request message from UE, transmission unit 902 will be triggered to PCF Network element sends the policy request message for being used for acquisition strategy information.

As a kind of possible embodiment, first network slice may include eMBB slice.

In addition, the method and step that the AMF network element of above-mentioned Fig. 4 and Fig. 5 executes can also be performed in the AMF network element, can also wrap Other units for executing the method and step of AMF network element execution of above-mentioned Fig. 4 and Fig. 5 are included, details are not described herein again.

Based on the network architecture shown in Fig. 2, referring to Fig. 10, Figure 10 is a kind of communication device disclosed by the embodiments of the present invention Structural schematic diagram.As shown in Figure 10, which may include processor 1001, memory 1002,1003 and of transceiver Bus 1004.Processor 1001 can be a general central processor (CPU), multiple CPU, microprocessor, specific application collection At circuit (application-specific integrated circuit, ASIC), or one or more is for controlling this hair The integrated circuit that bright scheme processes execute.Memory 1002 can be read-only memory (read-only memory, ROM) or can Store the other kinds of static storage device of static information and instruction, random access memory (random access Memory, RAM) or the other kinds of dynamic memory of information and instruction can be stored, it is also possible to electric erazable programmable Read-only memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), read-only light Disk (Compact Disc Read-Only Memory, CD-ROM) or other optical disc storages, optical disc storage (including compression optical disc, Laser disc, optical disc, Digital Versatile Disc, Blu-ray Disc etc.), magnetic disk storage medium or other magnetic storage apparatus or can For carry or store have instruction or data structure form desired program code and can be by any of computer access Other media, but not limited to this.Memory 1002, which can be, to be individually present, and bus 1004 is connected with processor 1001.Storage Device 1002 can also be integrated with processor 1001.Bus 1004 may include an access, and letter is transmitted between said modules Breath.Transceiver 1003 can be dual-mode antenna, or other transceiving devices.Wherein:

In one embodiment, which can be the AMF network element or chip of first network.Wherein:

Transceiver 1003, for receiving the login request message from UE；

Batch processing code is stored in memory 1002, processor 1001 is for calling the journey stored in memory 1002 Sequence code executes following operation:

Obtain the NSSAI for allowing the UE access；

When first condition meets, indicate that the UE initiates session establishment request message, which is used for Establish the session of the UE and first network slice；

Wherein, first condition may include:

There are communication interfaces by least one MME of AMF network element and the second network；

There is the MME for not supporting the first function, the first function at least one MME are as follows: execute in attaching process not for UE Establish PDN connection；And

Allow the UE access NSSAI include first network slice S-NSSAI.

As a kind of possible embodiment, processor 1001 indicates that the UE initiates session establishment request message and includes:

Transceiver 1003 sends the instruction information for being used to indicate the UE and initiating session establishment request message to the UE.

As a kind of possible embodiment, transceiver 1003 is used to indicate UE initiation session establishment to UE transmission and asks The instruction information for seeking message includes:

Registration received message is sent to the UE, which includes the instruction information and allow the UE access NSSAI。

As a kind of possible embodiment, first network slice may include eMBB slice.

In another embodiment, which can be UE or chip.Wherein:

Batch processing code is stored in memory 1002, processor 1001 is for calling the journey stored in memory 1002 Sequence code control transceiver 1003 executes following operation:

Receive the instruction for being used to initiate session establishment request message of the AMF network element from first network；

Session establishment request message is sent to AMF network element according to the instruction, session establishment request message is for establishing the UE With the session of first network.

As a kind of possible embodiment, transceiver 1003 receive the AMF network element from first network for initiating The instruction of session establishment request message includes:

Transceiver 1003 sends session establishment request message to AMF network element according to the instruction

As a kind of possible embodiment, transceiver 1003 receives being used to indicate for the AMF network element from first network The UE initiate session establishment request message instruction information include:

As a kind of possible embodiment, first network slice may include eMBB slice.

In another embodiment, which can be UE or chip.Wherein:

Receive the AMF network element from first network registration received message, the registration received message include instruction information and Allow the NSSAI of the UE access, wherein allow the UE access NSSAI include first network slice S-NSSAI, the finger Show that information is used to indicate the MME of AMF network element and the second network with the presence or absence of communication interface；

When the instruction information indicates that AMF network element and MME there are when communication interface, send session establishment request to AMF network element Message, session establishment request message are used to establish the session of the UE and first network slice.

As a kind of possible embodiment, processor 1001 is also used to call the program code stored in memory 1002 Execute following operation:

Configuration information is obtained, which can be with are as follows: when the AMF network element and MME that the UE is registered are there are communication interface, And when the NSSAI of the UE access being allowed to include the S-NSSAI of first network slice, which sends meeting to the AMF network element registered Words establish request message；

Transceiver 1003 sends session establishment request message to AMF network element

Session establishment request message is sent to AMF network element according to the configuration information.

As a kind of possible embodiment, registration received message further includes policy information, which can be with are as follows: when There are communication interfaces with MME for the AMF network element that the UE is registered, and the NSSAI of the UE access is allowed to include what first network was sliced When S-NSSAI, which sends session establishment request message to the AMF network element registered；

As a kind of possible embodiment, first network slice may include eMBB slice.

In another embodiment, which can be the AMF network element or chip of first network.Wherein:

Receive the login request message from UE；

Registration received message is sent to the UE, which may include instruction information and allow the UE access NSSAI, wherein allow the UE access NSSAI include first network slice S-NSSAI, which is used to indicate AMF There are communication interfaces by the MME of network element and the second network；

The session establishment request message from the UE is received, session establishment request message is for establishing the UE and first network The session of slice.

As a kind of possible embodiment, registration received message further includes policy information, which can be with are as follows: when There are communication interfaces with MME for the AMF network element that the UE is registered, and the NSSAI of the UE access is allowed to include what first network was sliced When S-NSSAI, which sends session establishment request message to the AMF network element registered.

As a kind of possible embodiment, processor 1001 is also used to call the program code stored in memory 1002 Control transceiver 1003 executes following operation:

The policy request message for obtaining the policy information is sent to PCF network element；

Receive the policy information from the PCF network element.

As a kind of possible embodiment, first network slice may include eMBB slice.

A kind of communication system is also disclosed in one embodiment, the communication system may include above-mentioned Fig. 6 AMF network element and The UE of above-mentioned Fig. 7.

A kind of communication system is also disclosed in one embodiment, which may include the UE of above-mentioned Fig. 8 and above-mentioned The AMF network element of Fig. 9.

The embodiment of the invention also discloses a kind of readable storage medium storing program for executing, which stores UE and/or AMF net Member is for executing the program code of Fig. 3-communication means shown in fig. 5.

Those skilled in the art are it will be appreciated that in said one or multiple examples, function described in the invention It can be realized with hardware, software, firmware or their any combination.It when implemented in software, can be by these functions Storage in computer-readable medium or as on computer-readable medium one or more instructions or code transmitted. Computer-readable medium includes computer storage media and communication media, wherein communication media include convenient for from a place to Any medium of another place transmission computer program.Storage medium can be times that general or specialized computer can access What usable medium.

Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention Protection scope, all any modification, equivalent substitution, improvement and etc. on the basis of technical solution of the present invention, done should all Including within protection scope of the present invention.

Claims

1. a kind of communication means characterized by comprising

The access of first network and mobile management function to ps domain network element receive the login request message from user equipment；

The access and mobile management function to ps domain network element obtain the network for allowing the user equipment to access and are sliced auxiliary information；

When first condition meets, the access and mobile management function to ps domain network element indicate that the user equipment initiates session establishment Request message, the session establishment request message are used to establish the session of the user equipment and first network slice；

Wherein, the first condition includes:

The access and mobile management function to ps domain network element exist to communicate at least one mobility management entity of the second network to be connect Mouthful；

There is the mobility management entity for not supporting the first function, first function at least one described mobility management entity It can are as follows: executed for user equipment and do not establish public data network connection in attaching process；And

The network for allowing the user equipment to access is sliced single network that auxiliary information includes the first network slice and cuts Piece auxiliary information.

2. the method according to claim 1, wherein described in the access and the instruction of mobile management function to ps domain network element User equipment initiates session establishment request message

The access and mobile management function to ps domain network element are used to indicate the user equipment to user equipment transmission and initiate meeting Words establish the instruction information of request message.

3. according to the method described in claim 2, it is characterized in that, the access and mobile management function to ps domain network element are to the use Family equipment sends to be used to indicate the user equipment and initiate the instruction information of session establishment request message

The access and mobile management function to ps domain network element are sent to the user equipment registers received message, and the registration receiving disappears Breath includes that the instruction information and the network for allowing the user equipment to access are sliced auxiliary information.

4. a kind of communication means characterized by comprising

The session establishment that is used to initiate that user equipment receives access and mobile management function to ps domain network element from first network is requested The instruction of message；

The user equipment indicates that sending session establishment request to the access and mobile management function to ps domain network element disappears according to described Breath, the session establishment request message are used to establish the session of the user equipment and first network slice.

5. according to the method described in claim 4, it is characterized in that, the user equipment receive access from first network and The instruction for initiating session establishment request message of mobile management function to ps domain network element includes:

Access and mobile management function to ps domain network element of the user equipment reception from first network are used to indicate the user The instruction information of equipment initiation session establishment request message；

The user equipment indicates that sending session establishment request to the access and mobile management function to ps domain network element disappears according to described Breath includes:

The user equipment sends the session to the access and mobile management function to ps domain network element according to the instruction information and builds Vertical request message.

6. according to the method described in claim 5, it is characterized in that, the user equipment receive access from first network and The user equipment of being used to indicate of mobile management function to ps domain network element initiates the instruction information of session establishment request message and includes:

The user equipment receives the registration received message of access and mobile management function to ps domain network element from first network, described Registration received message includes that the instruction information and the network for allowing the user equipment to access are sliced auxiliary information, wherein institute It includes single network slice auxiliary that the first network is sliced that the network that stating allows the user equipment to access, which is sliced auxiliary information, Information.

7. a kind of communication means characterized by comprising

User equipment receives the registration received message of access and mobile management function to ps domain network element from first network, the registration Received message includes indicating that information and the network for allowing the user equipment to access are sliced auxiliary information, wherein the permission institute The network slice auxiliary information for stating user equipment access includes single network slice auxiliary information of first network slice, the instruction Information is used to indicate the mobility management entity of the access and mobile management function to ps domain network element and the second network with the presence or absence of logical Believe interface；

Lead to when the instruction information instruction access and mobile management function to ps domain network element and the mobility management entity exist When believing interface, the user equipment sends session establishment request message to the access and mobile management function to ps domain network element, described Session establishment request message is used to establish the session of the user equipment and first network slice.

8. the method according to the description of claim 7 is characterized in that the method also includes:

The user equipment obtains configuration information, the configuration information are as follows: when the access and movement that the user equipment is registered Property management function network element and mobility management entity there are communication interface, and the network for allowing the user equipment to access be sliced it is auxiliary When supplementary information includes single network slice auxiliary information of the first network slice, the user equipment connects to described registered Enter and sends session establishment request message with mobile management function to ps domain network element；

The user equipment sends session establishment request message to the access and mobile management function to ps domain network element

The user equipment sends the session to the access and mobile management function to ps domain network element according to the configuration information and builds Vertical request message.

9. described the method according to the description of claim 7 is characterized in that the registration received message further includes policy information Policy information are as follows: the access and mobile management function to ps domain network element registered when the user equipment and mobility management entity exist Communication interface, and it includes single network that the first network is sliced that the network for allowing the user equipment to access, which is sliced auxiliary information, When being sliced auxiliary information, the user equipment sends session establishment to the registered access and mobile management function to ps domain network element Request message；

The user equipment sends the session to the access and mobile management function to ps domain network element according to the policy information and builds Vertical request message.

10. a kind of communication means characterized by comprising

The access and mobile management function to ps domain network element are sent to the user equipment registers received message, and the registration receiving disappears Breath includes that instruction information and the network for allowing the user equipment to access are sliced auxiliary information, wherein described to allow the user The network slice auxiliary information of equipment access includes single network slice auxiliary information of first network slice, and the instruction information is used In the mobility management entity for indicating the access and mobile management function to ps domain network element and the second network, there are communication interfaces；

The access and mobile management function to ps domain network element receive the session establishment request message from the user equipment, the meeting Words establish request message for establishing the session of the user equipment and first network slice.

11. according to the method described in claim 10, it is characterized in that, the registration received message further includes policy information, institute State policy information are as follows: the access registered when the user equipment and mobile management function to ps domain network element are deposited with mobility management entity In communication interface, and it includes single net that the first network is sliced that the network for allowing the user equipment to access, which is sliced auxiliary information, When network is sliced auxiliary information, the user equipment sends session to the registered access and mobile management function to ps domain network element and builds Vertical request message.

12. according to the method for claim 11, which is characterized in that the method also includes:

The access and mobile management function to ps domain network element are sent to policy control functions network element for obtaining the policy information Policy request message；

The access and mobile management function to ps domain network element receive the policy information from the policy control functions network element.

13. -12 described in any item methods according to claim 1, which is characterized in that the first network slice includes that enhancing moves Dynamic broadband slice.

14. a kind of access and mobile management function to ps domain network element, which is characterized in that the access and mobile management function to ps domain network element category In first network, comprising:

Communication unit, for receiving the login request message from user equipment；

Acquiring unit is sliced auxiliary information for obtaining the network for allowing the user equipment to access；

Indicating unit, for when first condition meets, indicating that the user equipment initiates session establishment request message, the meeting Words establish request message for establishing the session of the user equipment and first network slice；

Wherein, the first condition includes:

It includes the first network that the network that the permission user equipment that the acquiring unit obtains accesses, which is sliced auxiliary information, Single network of slice is sliced auxiliary information.

15. access according to claim 14 and mobile management function to ps domain network element, which is characterized in that the indicating unit refers to Show that the user equipment initiates session establishment request message and includes:

The instruction information for being used to indicate the user equipment and initiating session establishment request message is sent to the user equipment.

16. it is according to claim 15 access and mobile management function to ps domain network element, which is characterized in that the indicating unit to The user equipment sends to be used to indicate the user equipment and initiate the instruction information of session establishment request message

Registration received message is sent to the user equipment, the registration received message includes the instruction information and the permission The network of the user equipment access is sliced auxiliary information.

17. a kind of user equipment characterized by comprising

Receiving unit, for receive access from first network and mobile management function to ps domain network element for initiating session establishment The instruction of request message；

Transmission unit, for indicating to send to the access and mobile management function to ps domain network element according to the receiving unit is received Session establishment request message, the session establishment request message are used to establish the meeting of the user equipment and first network slice Words.

18. user equipment according to claim 17, which is characterized in that the receiving unit is received from first network Access and the instruction for initiating session establishment request message of mobile management function to ps domain network element include:

The user equipment that is used to indicate for receiving access and mobile management function to ps domain network element from first network initiates session Establish the instruction information of request message；

The transmission unit indicates that sending session establishment request to the access and mobile management function to ps domain network element disappears according to described Breath includes:

The session establishment request message is sent to the access and mobile management function to ps domain network element according to the instruction information.

19. user equipment according to claim 18, which is characterized in that the receiving unit is received from first network The instruction information for being used to indicate the user equipment and initiating session establishment request message of access and mobile management function to ps domain network element Include:

Receive the registration received message of access and mobile management function to ps domain network element from first network, the registration received message Auxiliary information is sliced including the instruction information and the network for allowing the user equipment to access, wherein described to allow the use The network slice auxiliary information of family equipment access includes single network slice auxiliary information of the first network slice.

20. a kind of user equipment characterized by comprising

Receiving unit, for receiving the access from first network and the registration received message of mobile management function to ps domain network element, institute Stating registration received message includes indicating that information and the network for allowing the user equipment to access are sliced auxiliary information, wherein described The network of the user equipment access is allowed to be sliced single network slice auxiliary information that auxiliary information includes first network slice, institute State instruction information be used to indicate the access and mobile management function to ps domain network element and the second network mobility management entity whether There are communication interfaces；

Transmission unit, for when the receiving unit received instruction information instruction access and mobile management function to ps domain network element With the mobility management entity there are when communication interface, session establishment is sent to the access and mobile management function to ps domain network element Request message, the session establishment request message are used to establish the session of the user equipment and first network slice.

21. user equipment according to claim 20, which is characterized in that the user equipment further include:

Acquiring unit, for obtaining configuration information, the configuration information are as follows: when the access and movement that the user equipment is registered Property management function network element and mobility management entity there are communication interface, and the network for allowing the user equipment to access be sliced it is auxiliary When supplementary information includes single network slice auxiliary information of the first network slice, the user equipment connects to described registered Enter and sends session establishment request message with mobile management function to ps domain network element；

The transmission unit sends session establishment request message to the access and mobile management function to ps domain network element

The configuration information obtained according to the acquiring unit sends the session to the access and mobile management function to ps domain network element Establish request message.

22. user equipment according to claim 20, which is characterized in that the registration received message further includes tactful letter Breath, the policy information are as follows: the access and mobile management function to ps domain network element and mobile management registered when the user equipment There are communication interfaces for entity, and it includes that the first network is sliced that the network for allowing the user equipment to access, which is sliced auxiliary information, Single network when being sliced auxiliary information, the user equipment is sent to the registered access and mobile management function to ps domain network element Session establishment request message；

The session establishment request message is sent to the access and mobile management function to ps domain network element according to the policy information.

23. a kind of access and mobile management function to ps domain network element, which is characterized in that the access and mobile management function to ps domain network element category In first network, comprising:

Receiving unit, for receiving the login request message from user equipment；

Transmission unit, for sending registration received message to the user equipment, the registration received message includes instruction information Auxiliary information is sliced with the network for allowing the user equipment to access, wherein the network for allowing the user equipment to access Slice auxiliary information includes single network slice auxiliary information of first network slice, and the instruction information is used to indicate the access There are communication interfaces with the mobility management entity of mobile management function to ps domain network element and the second network；

The receiving unit, is also used to receive the session establishment request message from the user equipment, and the session establishment is asked Ask message for establishing the session of the user equipment and first network slice.

24. access according to claim 23 and mobile management function to ps domain network element, which is characterized in that the registration receiving disappears Breath further includes policy information, the policy information are as follows: the access registered when the user equipment and mobile management function to ps domain net There are communication interfaces with mobility management entity for member, and it includes institute that the network for allowing the user equipment to access, which is sliced auxiliary information, When stating single network slice auxiliary information of first network slice, the user equipment is to the registered access and mobility pipe It manages functional network element and sends session establishment request message.

25. access according to claim 24 and mobile management function to ps domain network element, which is characterized in that the transmission unit, It is also used to send the policy request message for obtaining the policy information to policy control functions network element；

The receiving unit is also used to receive the policy information from the policy control functions network element.

26. the described in any item accesses of 4-16 and mobile management function to ps domain network element according to claim 1, described in any one of 17-22 User equipment or claim 23-25 it is described in any item access and mobile management function to ps domain network element, which is characterized in that institute Stating first network slice includes enhancing mobile broadband slice.

27. a kind of communication system characterized by comprising

Such as the described in any item accesses of claim 14-16 and mobile management function to ps domain network element；And

Such as the described in any item user equipmenies of claim 17-19.

28. a kind of communication system characterized by comprising

Such as the described in any item accesses of claim 23-25 and mobile management function to ps domain network element；And

Such as the described in any item user equipmenies of claim 20-22.

29. a kind of computer readable storage medium, which is characterized in that program is stored on the storage medium, when program is run When, realize such as the described in any item communication means of claim 1-13.

30. a kind of communication device characterized by comprising

Hardware relevant to program instruction, the hardware require method and step described in any one of 1-13 for perform claim.