CN108738086A

CN108738086A - A kind of method and device of user plane gravity treatment

Info

Publication number: CN108738086A
Application number: CN201710267662.9A
Authority: CN
Inventors: 孙德奎; 周汉; 吴问付
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-04-21
Filing date: 2017-04-21
Publication date: 2018-11-02
Anticipated expiration: 2037-04-21
Also published as: CN108738086B

Abstract

This application discloses a kind of method and devices of user plane gravity treatment, belong to the communications field.The method includes：Conversation management functional SMF receives the session identification of the position of user equipment (UE) and the Packet Data Unit PDU sessions of the UE；The SMF is preset mode in the conversation modes of the corresponding PDU sessions of the session identification and the user plane path of the PDU sessions is revised as the UE to the path between the 2nd UPF when the position of the UE or the required professional abilities of the UE exceed the service range of corresponding first UPF of the PDU sessions.The application can reduce the consumption of time delay and signal resource.

Description

A kind of method and device of user plane gravity treatment

Technical field

This application involves the communications field, more particularly to a kind of method and device of user plane gravity treatment.

Background technology

With the development of the communication technology, user can be surfed the Internet or be received and dispatched the business such as short message using mobile terminal.Wherein, The conversation management functional (Session Management Function, SMF) for being located at core net in signaling plane can be movement The resources such as terminal distribution user plane functions (User Plane Function, UPF).Mobile terminal can be with this in user plane Being established between UPF has path (and can be described as connecting), mobile terminal that can send or receive business datum by the path.But it moves Dynamic terminal is significantly moved sometimes, has left the service range of UPF, in order to provide preferably service to mobile terminal, this When need gravity treatment user plane, so-called gravity treatment user plane be exactly be the new UPF of mobile terminal gravity treatment be that UE is serviced.

The process of gravity treatment user plane at present, Ke Yiwei：The streams such as service request, location updating or switching are carried out in mobile terminal During journey, SMF obtains the current location of mobile terminal and determines currently between mobile terminal there are the UPF in path, Determining UPF is referred to as original UPF for convenience of description, and SMF is to mobile terminal when position exceeds the service range of original UPF in this prior Send reconstruction request message.Mobile terminal is executed under the triggering of the reconstruction request message between release mobile terminal and original UPF Path release flow, then execute and establish the Establishing process in the path between mobile terminal and a new UPF, new UPF's Service range includes the current location of mobile terminal, to complete the replacement of user plane.

During realizing the application, the inventor finds that the existing technology has at least the following problems：

Current scheme includes release flow and Establishing process, the two requirements of process mobile terminals and SMF, original UPF and The network elements such as new UPF carry out a large amount of Signalling exchanges, to increase the consumption of time delay and signal resource.

Invention content

In order to reduce the consumption of time delay and signal resource, this application provides a kind of method and devices of user plane gravity treatment. The technical solution is as follows：

The application puies forward embodiment and a kind of method of user plane gravity treatment, the method has been supplied to be connect by conversation management functional SMF Receive the session identification of the position of user equipment (UE) and the Packet Data Unit PDU sessions of the UE；It is corresponded in the session identification The conversation modes of the PDU sessions be preset mode and super in the position of the UE or the required professional abilities of the UE When going out the service range of corresponding first UPF of the PDU sessions, the user plane path of the PDU sessions is revised as the UE Path between to the 2nd UPF.The user plane path of the PDU sessions is revised as the UE to institute since SMF is used State the path between the 2nd UPF, so that it may realize user plane gravity treatment, and select required for the 2nd UPF and modification user plane path Interactive signaling is less, so as to reduce the consumption of time delay and signal resource.

In a kind of possible realization method of first aspect, the operation of the SMF modifications user plane path can be：Choosing It selects the 2nd UPF to service for the UE, the user plane path of the PDU sessions is revised as the UE to selected second Path between UPF.

In a kind of possible realization method of first aspect, the SMF is set by establishing the 2nd UPF with access net Tunnel between standby obtains the tunnel in the tunnel information of the 2nd sides UPF, and the access network equipment is the UE access Access network equipment；The first contextual information is obtained, first contextual information includes the ground that the SMF is UE distribution Location information or the address information that the 2nd UPF is UE distribution；It sends a notification message to access network equipment, the notice disappears Breath includes the tunnel information of the session identification, first contextual information and the 2nd sides UPF, and the notification message is used Tunnel information in corresponding first sides UPF of the session identification that the access network equipment is preserved is updated to described The tunnel information of 2nd sides UPF, and corresponding second contextual information of the session identification for preserving the UE is more It is newly first contextual information.In this way by by the session identification preserved in access network equipment corresponding described first The tunnel information of the sides UPF is updated to the tunnel information of the 2nd sides UPF, and the session identification pair that the UE is preserved The second contextual information answered is updated to first contextual information, so that it may realize modification user plane path, and update tunnel The signaling of interaction required for information and contextual information is less, so as to reduce the consumption of time delay and signal resource.

In a kind of possible realization method of first aspect, the SMF after sending the notification message, also receive described in The response message that access network equipment is sent, the response message includes the tunnel between the access network equipment and the 2nd UPF Tunnel information of the road in the access network equipment side；The tunnel information of the access network equipment side is sent to the 2nd UPF.This Sample makes the tunnel information that the 2nd sides UPF are preserved in access network equipment, and the tunnel letter of access network equipment side is preserved in the 2nd UPF Breath, so as to so that the tunnel between access network equipment and the 2nd UPF is connected to.

In a kind of possible realization method of first aspect, the SMF can also be received before selecting the 2nd UPF Tunnel information of the corresponding tunnel of the PDU sessions that access network equipment is sent in the access network equipment side；And it is described SMF can also send the tunnel information of the access network equipment side after selecting the 2nd UPF to the 2nd UPF.Make in this way The tunnel information of the 2nd sides UPF is preserved in access network equipment, and the tunnel information of access network equipment side is preserved in the 2nd UPF, So as to so that the tunnel between access network equipment and the 2nd UPF is connected to.

In a kind of possible realization method of first aspect, the SMF receives the UE's that access network equipment is sent The session identification of the PDU sessions of position and the UE, the position of the UE and the session identification are that the access network equipment exists It receives sending after the service request non access stratum NAS message or location update message that the UE is sent or by the UE From source, access network equipment, which is switched to, sends when the access network equipment.In this way can the service request flow of UE or position more User plane gravity treatment is realized in new technological process, and the signalling interactive process in flow or position update flow can be asked with common business, from And the consumption of time delay and signal resource may further be reduced.

In a kind of possible realization method of first aspect, the conversation modes are session and business continuance SSC moulds Formula, the preset mode are SSC patterns 2, can trigger the release of PDU sessions and UPF, notice in 2 lower network side of the SSC patterns Data network where UE and UE creates PDU sessions, and selects new UPF during newly-built PDU sessions.

Second aspect, the embodiment of the present application provide a kind of method of user plane gravity treatment, and the method passes through access network equipment Obtain the session identification of the position of user equipment (UE) and the Packet Data Unit PDU sessions of the UE；To conversation management functional SMF Send the position and the session identification；The access network equipment receives the SMF required for the position or the UE Service range of the professional ability beyond corresponding first UPF of the PDU sessions and corresponding described in the session identification The notification message that the conversation modes of PDU sessions are sent when being preset mode, the notification message include the first contextual information, institute The tunnel between session identification and the 2nd UPF and the access network equipment is stated in the tunnel information of the 2nd sides UPF, institute It includes the address information that the SMF is the UE distribution or the address that the 2nd UPF is the UE distribution to state the first contextual information Information；The tunnel information of the first sides UPF of preservation is updated to described in tunnel information and the notice of the 2nd sides UPF Corresponding second contextual information of the session identification that the UE is preserved is updated to first contextual information by UE.Due to Access network equipment receives the tunnel information of the first contextual information and the 2nd sides UPF, in this way can be by described the of preservation The session mark that the tunnel information of one sides UPF is updated to the tunnel information of the 2nd sides UPF and will be preserved in the UE Know corresponding second contextual information and be updated to first contextual information, realizes user plane gravity treatment, and this two update behaviour The signaling of interaction required for making is less, so as to reduce the consumption of time delay and signal resource.

In a kind of possible realization method of second aspect, the access network equipment receives the business that the UE is sent and asks Message, the business request information is asked to carry the session identification of the PDU sessions of the UE, the business request information is asked for business Ask non access stratum NAS message or location update message；The position of the UE is obtained under the triggering of the business request information；To Core net accesses and mobile management function to ps domain AMF sends the business request information for carrying the session identification and the position, with The AMF is set to send the session identification and the position to the SMF.Due to sending business when UE carries out service request flow Request NAS message carries out sending location update message when position update flow, in this way can UE service request flow or User plane gravity treatment is realized in position update flow, and the Signalling exchange mistake in flow or position update flow can be asked with common business Journey, to which the consumption of time delay and signal resource may further be reduced.

In a kind of possible realization method of second aspect, the access network equipment is setting the UE from source access net For when being switched to the access network equipment, obtains the position of the UE and obtain the UE's from the source access network equipment The session identification of PDU sessions；To core net access and mobile management function to ps domain AMF transmitting path handover requests, the path is cut It changes message and carries the session identification and the position, so that the AMF sends the session identification and institute's rheme to the SMF It sets.Since when switching over flow, the UE is switched to the access net to UE by the access network equipment from source access network equipment Equipment can realize user plane gravity treatment in switching flow, can share the signalling interactive process in switching flow in this way, to The consumption of time delay and signal resource may further be reduced.

In a kind of possible realization method of second aspect, the path switching message also carries the PDU sessions pair Tunnel information of the tunnel answered in the access network equipment side；The access network equipment also obtains before transmitting path handover request Take the corresponding tunnel of the PDU sessions in the tunnel information of the access network equipment side.Access net can be sent to SMF in this way to set The tunnel information of standby side, so that the tunnel information of access network equipment side is sent the 2nd UPF by SMF, so as to so that access net is set The standby tunnel connection between the 2nd UPF.

In a kind of possible realization method of second aspect, the access network equipment sends a notification message to the UE, The notification message carries the session identification and first contextual information, so that the UE is by the session mark of preservation Know corresponding second contextual information and is updated to first contextual information；The response message that the UE is sent also is received, to Core net accesses and mobile management function to ps domain AMF sends the response message, and the response message carries the access network equipment Tunnel between the 2nd UPF the access network equipment side tunnel information so that the AMF is sent to the SMF The tunnel information of the access network equipment side.Make the tunnel information that the 2nd sides UPF are preserved in access network equipment in this way, second The tunnel information that access network equipment side is preserved in UPF, so as to so that the tunnel between access network equipment and the 2nd UPF connects It is logical.

The third aspect, the embodiment of the present application provide a kind of method of user plane gravity treatment, and the method passes through user equipment (UE) Receive the notification message that access network equipment forwarding conversation management functional SMF is sent, the notification message includes session identification and the One contextual information, first contextual information include the address information or second user face that the SMF is UE distribution Function UPF is the address information of UE distribution, and the 2nd UPF is the UPF of the SMF selections；What the UE was preserved Corresponding second contextual information of the session identification is updated to first contextual information.Since UE receives the first context Information, corresponding second contextual information of the session identification preserved are updated to first contextual information, so that it may It realizes user plane gravity treatment, simplifies required for user plane gravity treatment the signaling of interaction, so as to reduce time delay and signal resource Consumption.

In a kind of possible realization method of the third aspect, first contextual information further includes quality of service Qos Rule；The UE described in this way can reconfigure wirelessly holding between the UE and the access network equipment according to the Qos rules It carries, radio bearer is made to meet current UE needs.

In a kind of possible realization method of the third aspect, the UE is before receiving the notification message also to access Net equipment sends service request non access stratum NAS message, and the service request NAS message includes the session identification, the industry Business request NAS message sends the position of the session identification and the UE for the access network equipment to the SMF；Alternatively, Location update message is sent to access network equipment, the location update message includes the session identification, and the location updating disappears Breath sends the position of the session identification and the UE for the access network equipment to the SMF.It is asked since UE carries out business It asks and sends service request NAS message when flow or carry out sending location update message when position update flow, it in this way can be in UE Service request flow or position update flow in realize user plane gravity treatment, flow or location updating stream can be asked with common business Signalling interactive process in journey, to which the consumption of time delay and signal resource may further be reduced.

Fourth aspect, the embodiment of the present application provide a kind of method of user plane gravity treatment, and the method is obtained by access network equipment Take the session identification of the position of user equipment (UE) and the Packet Data Unit PDU sessions of the UE, the access network equipment is to meeting It talks about management function SMF and sends the position and the session identification；The SMF is in the position or the required business of the UE Service range and the session identification corresponding PDU session of the ability beyond corresponding first UPF of the PDU sessions Conversation modes send a notification message when being preset mode to the access network equipment, and the notification message is believed including the first context Tunnel between breath, the session identification and the 2nd UPF and the access network equipment the 2nd sides UPF tunnel information, First contextual information includes the address information that the SMF is the UE distribution or the 2nd UPF is the UE distribution Address information；The tunnel information of the first sides UPF of preservation is updated to the 2nd sides UPF by the access network equipment Tunnel information and corresponding second contextual information of the session identification preserved in the UE is updated on described first Context information.

Since SMF is to the tunnel information of access network equipment transmission the first contextual information and the 2nd sides UPF, can make in this way The tunnel information of the first sides UPF of preservation is updated to the tunnel information of the 2nd sides UPF and led to by access network equipment Know that corresponding second contextual information of the session identification that the UE is preserved is updated to first context and believed by the UE Breath realizes user plane gravity treatment, and the signaling of interaction required for this two update operations is less, so as to reduce time delay and signaling The consumption of resource.

5th aspect, the embodiment of the present application provide a kind of device of user plane gravity treatment, execute first aspect or first aspect Any one possible realization method in method.Specifically, described device includes for executing first aspect or first party The unit of method in the possible realization method of any one of face.

6th aspect, the embodiment of the present application provide a kind of device of user plane gravity treatment, execute second aspect or second aspect Any one possible realization method in method.Specifically, described device includes for executing second aspect or second party The unit of method in the possible realization method of any one of face.

7th aspect, the embodiment of the present application provide a kind of device of user plane gravity treatment, execute the third aspect or the third aspect Any one possible realization method in method.Specifically, described device includes for executing the third aspect or third party The unit of method in the possible realization method of any one of face.

Eighth aspect, the embodiment of the present application provide a kind of device of user plane gravity treatment, and described device includes input interface, defeated Outgoing interface, processor and memory.Wherein, can pass through between input interface, output interface, processor and the memory Bus system is connected.The memory is for storing program, instruction or code, and the processor is for executing in the memory Program, instruction or code complete the method in the arbitrary possible realization method of first aspect or first aspect, complete second party Method in the arbitrary possible realization method of face or second aspect, alternatively, the completion third aspect or the arbitrary of the third aspect can Method in the realization method of energy.

9th aspect, the embodiment of the present application provide a kind of system of user plane gravity treatment, and the system comprises the 5th aspect institutes The device described in device and the 7th aspect described in the device stated, the 6th aspect.

Tenth aspect, the embodiment of the present application provides a kind of computer readable storage medium, for storing computer program, The computer program is for executing the arbitrarily possible realization method of first aspect, second aspect, the third aspect, first aspect, the The instruction of the arbitrary possible realization method of two aspects or the method in the arbitrarily possible realization method of the third aspect.

In a first aspect, the embodiment of the present application provides a kind of computer program product, the computer program product includes The computer program stored in the computer readable storage medium, and the calculation procedure is carried out by processor Load the method in any one possible realization method to realize above-mentioned first aspect or first aspect, second aspect or the Method in any one possible realization method of two aspects, alternatively, any one of the third aspect or the third aspect may Realization method in method.

Description of the drawings

Fig. 1-1 is a kind of network architecture diagram provided by the embodiments of the present application；

Fig. 1-2 is another network architecture diagram provided by the embodiments of the present application；

Fig. 2 is a kind of method flow diagram of user plane gravity treatment provided by the embodiments of the present application；

Fig. 3 is the method flow diagram of another user plane gravity treatment provided by the embodiments of the present application；

Fig. 4 is a kind of apparatus structure schematic diagram of user plane gravity treatment provided by the embodiments of the present application；

Fig. 5 is the apparatus structure schematic diagram of another user plane gravity treatment provided by the embodiments of the present application；

Fig. 6 is the apparatus structure schematic diagram of another user plane gravity treatment provided by the embodiments of the present application；

Fig. 7 is the apparatus structure schematic diagram of another user plane gravity treatment provided by the embodiments of the present application；

Fig. 8 is the apparatus structure schematic diagram of another user plane gravity treatment provided by the embodiments of the present application；

Fig. 9 is the apparatus structure schematic diagram of another user plane gravity treatment provided by the embodiments of the present application.

Specific implementation mode

Being established in user equipment (Use Equipment, UE) has PDU sessions, and it is corresponding to remove the PDU sessions in UE at present When the service range of UPF, in order to provide preferably service to UE, the SMF for being located at network side sends reconstruction request message to UE, touches It sends out UE and carries out user plane gravity treatment.UE executes releasing for the path between the release UE and UPF under the triggering of the reconstruction request message Journey is released, the Establishing process for establishing the path between UE and another UPF is then executed, to realize user plane gravity treatment.

Wherein UE needs UE to carry out a large amount of Signalling exchanges with network side when carrying out release flow and Establishing process, rough to unite It is more than 20 steps to count out the interactive step number that UE carries out Signalling exchange with network side in two flows, increases time delay and signaling The consumption of resource.In order to reduce the required time delay of user plane gravity treatment and signal resource, following any embodiment can be passed through To realize.

Referring to Fig. 1-1, the embodiment of the application provides a kind of network architecture, which is suitable for 5G communication networks Network etc., including：

UE, access network equipment, UPF and SMF；Being established between UE and access network equipment has a radio bearer, access network equipment with Being established between UPF has tunnel, UPF to be connected with outer net；Established between SMF and access network equipment have signaling plane connection and SMF with Being established between UPF has signaling plane connection.

UE can be the mobile terminals such as mobile phone, tablet computer.Access network equipment can be wireless access network (Radio Access Network, RAN), access net (Access Network, AN), base station or evolved base station (evolved Node B, eNB) etc..

UE foundation has PDU sessions, and the user plane paths of the PDU sessions includes UE to the radio bearer between access network equipment Tunnel between access network equipment and UPF.The UPF can be that anchor point UPF, so-called anchor point UPF are the context for including the UE The UPF of information.

When UE needs transmission data, UE can be connected to UPF by the user plane of the PDU sessions and be sent the data.UPF The data are received, and the data are forwarded to outer net.When UPF receives the data for needing to be sent to UE, UPF can be by this The user plane of PDU sessions connects to UE and sends the data, and UE receives the data by the user plane connection of the PDU sessions.

UPF corresponds to a service range, and UE has mobility.When UE removes the service range or the required business of UE of UPF When ability exceeds the service range of UPF, for convenience of description, which is referred to as the first UPF, i.e. UE removes the service model of the first UPF It encloses or the required professional abilities of UE exceeds the service range of the first UPF, in order to give UE to provide preferably service, SMF can be UE selects the 2nd UPF, and the corresponding service ranges of the 2nd UPF include the position of UE or meet the required professional abilities of UE, by this The user plane path of PDU sessions is revised as UE to the path between the 2nd UPF.

The process that SMF changes the user plane path of the PDU sessions can be：

SMF by establishing the tunnel between the 2nd UPF and access network equipment, obtain the tunnel the 2nd sides UPF tunnel Information；The first contextual information is obtained, the first contextual information includes the address information that SMF is UE distribution or the 2nd UPF is UE The address information of distribution；It sends a notification message to access network equipment, which includes the session identification of the PDU sessions, The tunnel information of one contextual information and the 2nd sides UPF.

Access network equipment receives the notification message, the tunnel letter of corresponding first sides UPF of the session identification preserved Breath is updated to the tunnel information of the 2nd sides UPF, and session identification corresponding about second for notifying UE to preserve UE Literary information update is the first contextual information, realizes the user plane path for changing the PDU sessions.

Referring to Fig. 1-2, which further includes core net access and mobile management function to ps domain (Core Access and Mobility Management Function, AMF), the signaling plane connection between SMF and access network equipment includes that access net is set The standby signaling plane connection established between AMF and the signaling plane connection established between AMF and SMF.

SMF sends the notification message to AMF first when sending the notification message to access network equipment.It is logical that AMF receives this Know message, then the notification message is forwarded to access network equipment.

Referring to Fig. 1-2, the network architecture can also include policy control functions (Policy Control function, PCF), authentication server functions (Authentication Server Function, AUSF) and uniform data management Network elements such as (Unified Data Management, UDM) do not introduce the function of these network elements one by one herein.

Referring to Fig. 1-2, which can also include network interfaces, network element and the nets such as NG1, NG2, NG3 ... NG15 It can be established and be connected by these network interfaces between member, between UE and network element.

Referring to Fig. 2, the embodiment of the application provides a kind of method of user plane gravity treatment, this method can be applied to as The network architecture shown in Fig. 1-1 or Fig. 1-2.This method can be applied to UE and carry out in service request or the flow of location updating, User plane gravity treatment is executed when the position of UE or required professional ability exceed the service range of the first UPF, was realized in detail Journey includes：

Step 201：UE sends business request information to access network equipment, which includes the PDU sessions of UE Session identification.

UE sends the business request information when carrying out service request flow or position update flow to access network equipment.UE State before carrying out service request flow or position update flow is Idle state.

For service request flow, when UE needs to send business datum, UE executes service request flow；Alternatively, working as net When network side needs to send business datum to UE, network side dispatches UE, and UE executes service request flow under the scheduling of network side.UE The business request information sent to access network equipment when executing service request flow is service request Non-Access Stratum (Non Access Stratum, NAS) message.

For position update flow, when UE has left the region that the corresponding access network equipments of UE are UE configurations, UE starts Execution position more new technological process.Wherein, when UE is in Idle state, the corresponding access network equipments of UE are UE configuring areas, and UE matches at this Any position is moved in the region set need not notify the access network equipment；When UE removes the region of the configuration, UE needs logical Know the access network equipment and execution position more new technological process.The business that UE is sent in execution position more new technological process to access network equipment Request message is location update message.

UE can first restore the radio bearer between access network equipment in service request flow or position update flow, lead to It crosses the radio bearer and sends business request information to access network equipment.

Step 202：The business request information that access network equipment reception UE is sent sends the position for carrying UE to AMF and is somebody's turn to do The business request information of the session identification of PDU sessions.

Specifically, access network equipment receives the business request information that UE is sent, root by its radio bearer between UE The identity information that UE is determined according to the radio bearer obtains the position of UE according to the identity information of the UE, is sent to AMF and carries UE's The business request information of the session identification of position and the PDU sessions.

The identity information of UE can be the device identification of UE, which can identify UE in access network equipment.UE Position can be UE where cell cell information or tracking area (Tracking Area, TA) TA information etc..The cell Information can be the cell ID of the cell, the coverage area etc. of cell.The TA information can accord with for the tracking area identification of the TA (Tracking Area Identifier, TAI), the coverage area etc. of TA.

When realizing, the operation that access network equipment obtains the position of UE can be：

Access network equipment determines the cell where UE or the TA where UE according to the identity information of UE, obtains determining cell Cell information or determination TA position of the TAI information as UE.

Step 203：AMF receives the business request information, and conversation request message, the conversation request message packet are sent to SMF Include the session identification of the position and the PDU sessions of UE.

The business request information also can indicate that the required professional abilities of UE.The conversation request message that AMF is sent to SMF In can also include the required professional abilities of UE.

Wherein, AMF sends the session identification of the position and the PDU sessions of UE by way of conversation request message to SMF, A kind of only example provided in this embodiment, in actual implementation can also by other means to SMF send UE position and The session identification of the PDU sessions.For example, AMF can directly send the session identification of the position and the PDU sessions of UE to SMF, it can To send the data packet of the position and the session identification of the PDU sessions that include UE to SMF, which can be transmission control association Discuss (Transmission Control Protocol, TCP) packet or User Datagram Protocol (User Datagram Protocol, UDP) packet etc., or the signaling etc. of the session identification of the position and the PDU sessions that carry UE can be sent to SMF, Just differ an illustration herein.

Step 204：SMF receives the conversation request message, is determined whether to select UPF for UE according to the conversation request message, If so, executing step 205.

SMF includes the correspondence of the session identification of PDU sessions and the contextual information of PDU sessions.SMF is executing sheet Before step, UE is assisted to establish the PDU sessions of UE, and obtain the session identification and contextual information of the PDU sessions, by the PDU The session identification and contextual information of session correspond to the session identification and the contextual information of PDU sessions for being stored in PDU sessions Correspondence.

The contextual information includes the equipment that the conversation modes of the PDU sessions and the user plane path of the PDU sessions pass through The information such as device identification.The equipment that the user plane paths of the PDU sessions passes through include UE, UE access access network equipment and UE The equipment such as corresponding first UPF, so the contextual information of the PDU sessions includes the device identification of UE, the access network equipment The device identification of device identification and the first UPF.

The conversation modes of the PDU sessions can be session and business continuance (Session and service Continuity, SSC) pattern, SSC patterns may include SSC patterns 1, SSC patterns 2 and SSC patterns 3 at present.In SSC patterns 1 Under when the access technology of UE changes, for example when the access way of UE and position change, the PDU sessions of UE are corresponding UPF is remained unchanged, and the address of the PDU sessions remains unchanged；PDU sessions and UPF may be triggered in 2 lower network side of SSC patterns Release, create PDU sessions between data network where notifying UE and UE, selection is new during newly-built PDU sessions UPF；Allow UE before discharging old PDU sessions in 3 lower network side of SCC patterns, UE can be created between same data network PDU sessions, when trigger condition is effective, whether network side decision carries out the gravity treatment of UPF.

This step can be：SMF receives the conversation request message, which carries position and PDU of UE The session identification of session, according to the session identification of the PDU sessions, the context of session identification and PDU sessions from PDU sessions is believed The contextual information of the PDU sessions is obtained in the correspondence of breath；The PDU meetings are extracted from the contextual information of the PDU sessions Device identification and the conversation modes for talking about corresponding first UPF obtain the service model of the first UPF according to the device identification of the first UPF It encloses, if the conversation modes are determined as UE when exceeding the service range of the first UPF for the position of preset mode and UE selects UPF.

The preset mode can be SSC patterns 2.It can also include the service range of the device identification and UPF of UPF in SMF Correspondence.So obtaining the operation of the service range of the first UPF can be：

SMF is according to the device identification of the first UPF, from the correspondence of the service range of the device identification and UPF of the UPF Obtain the service range of the first UPF.

SMF can also obtain the required professional abilities of UE.Specifically, if the conversation request message includes needed for UE The professional ability wanted, then SMF the required professional abilities of UE are extracted from the conversation request message；For example, SMF is determined needed for UE The resource wanted, using the resource as the required professional abilities of UE.The resource can be the resources such as the network port and/or bandwidth.

Therefore, no matter the position of UE whether exceed the first UPF service range, the conversation modes be preset mode and UE When required professional ability exceeds the service range of the first UPF, SMF also can determine whether to reselect UPF for UE.

In conclusion SMF is preset mode in the conversation modes and surpasses in the positions UE or the required professional abilities of UE It is determined as UE selections UPF when the service range for going out the first UPF.

The service range of first UPF may include the first UPF service position range, the first UPF provide professional ability Range etc., professional ability range may include the professional ability that the first UPF is capable of providing and/or the money that the first UPF is capable of providing Source etc..

Therefore, in this step, when the position of UE is not in the position range of the first UPF services, determine that the position of UE is super Cross the service range of the first UPF；When the professional ability that the first UPF is capable of providing does not include the required professional abilities of UE or the When the resource that one UPF is provided is less than UE required resources, determine that the required professional abilities of UE exceed the service model of the first UPF It encloses.

Step 205：SMF is selected as the 2nd UPF of UE services, establishes the tunnel between the 2nd UPF and access network equipment, obtains Take the tunnel in the tunnel information of the 2nd sides UPF.

Specifically, SMF can be selected from the UPF that the correspondence of the service range of the device identification and UPF of UPF includes It selects the UPF for the position that service range includes UE and/or service range is selected to meet the UPF of the required professional abilities of UE, will select The UPF selected is as the 2nd UPF；By being interacted with the 2nd UPF, the signaling plane established between the 2nd UPF connects, and generates the Tunnel between two UPF and access network equipment is connected in the tunnel information of the 2nd sides UPF by the signaling plane between the 2nd UPF The tunnel information for sending the 2nd sides UPF to the 2nd UPF is connect, the tunnel between the 2nd UPF and access network equipment is established to realize.

The tunnel information of 2nd sides UPF includes endpoint mark of the device identification of the 2nd UPF with the tunnel in the 2nd sides UPF Know, which can be SMF distribution.

Step 206：SMF obtains the first contextual information, and the first contextual information includes the address information that SMF is UE distribution Or the 2nd UPF be UE distribution address information.

If the address information of UE is distributed by SMF, after SMF is selected as the 2nd UPF of UE services, so that it may to be distributed for UE Address information.The address information can directly be distributed by SMF or be distributed by SMF requests for distributing the server of address information Deng.

If distributing the address information of UE by the 2nd UPF, SMF with the 2nd UPF during interacting, the 2nd UPF points Address information with UE, and the address information of UE is sent to SMF, SMF receives the address information of UE.

SMF can also be retrieved as quality of service (the Quality of of UE services after selecting the 2nd UPF from PCF Service, Qos) rule.

Step 207：SMF sends a notification message to AMF, which includes the session identification of the PDU sessions, on first The tunnel information of context information and the 2nd sides UPF.

The notification message is for notifying UE to change the PDU sessions.If SMF obtains Qos rules, which may be used also To include Qos rules.In actual implementation, there are many ways of realization of the notification message, such as the notification message can be The session response message of response session request message, or can be session identification, the first context letter for including the PDU sessions The forms such as the data packet of tunnel information of breath and the 2nd sides UPF, will not enumerate explanation herein.

When realizing, which may include the tunnel letter of PDU session modification requests NAS message and the 2nd sides UPF Breath, the PDU session modification request NAS messages are for notifying UE to change the PDU sessions, and the PDU session modification request NAS messages Carry the session identification and the first contextual information.If SMF obtains the Qos rules serviced for UE, the PDU session modifications Request NAS message also carries Qos rules.

Step 208：AMF receives the notification message, and the notification message and business response message are sent to access network equipment.

The business response message is responses of the AMF to the UE business request informations sent.When the business request information is industry Business request NAS message, which can be service request replies NAS message；When the business request information is position New information, the business response message can be location updating response message.

In the present embodiment, AMF sends the notification message to access network equipment and business response message sequencing is not done Limitation.In actual implementation, AMF can send the notification message and business response message, i.e. AMF etc. to access network equipment simultaneously Waiting receive sends the notification message and business response message after the notification message to access network equipment simultaneously；AMF can first to Access network equipment sends the business response message and then sends the notification message to access network equipment again, for example, AMF is being received After business request information, can to access network equipment send business response message, receive SMF transmission notification message after to Access network equipment sends the notification message；Alternatively, AMF first can send the notification message then again to access to access network equipment Net equipment sends business response message.

Step 209：Access network equipment receives the notification message and business response message, by the tunnel of the first sides UPF of preservation Road information update is the tunnel information for the 2nd sides UPF that the notification message includes, and the notification message and business response are sent to UE Message.

Access network equipment includes the correspondence of the session identification of PDU sessions and the contextual information of PDU sessions.Due to The user plane path of the PDU sessions of UE passes through access network equipment, so when the user plane path of the PDU sessions is established, access Net equipment can get the session identification and contextual information of the PDU sessions, by the session identification and context of the PDU sessions Information corresponds in the correspondence of the session identification of the PDU sessions preserved and the contextual information of PDU sessions.Access network equipment obtains The contextual information of the PDU sessions taken includes that the tunnel between the first UPF and access network equipment is believed in the tunnel of the first sides UPF Breath and the tunnel access network equipment side tunnel information etc..Tunnel information of the tunnel in access network equipment side includes access The Endpoint ID of the device identification of net equipment and the tunnel in access network equipment side.

This step can be：Access network equipment receives the notification message and business response message, is carried from the notification message The tunnel information for taking the session identification and the 2nd sides UPF of the PDU sessions, according to the session identification of the PDU sessions, from PDU sessions Session identification contextual information corresponding with the PDU sessions are obtained in the contextual information of PDU sessions, by the PDU sessions The tunnel information for the first sides UPF that contextual information includes is updated to the tunnel information of the 2nd sides UPF, and sending the notice to UE disappears Breath and business response message.

Step 210：UE receives the notification message and the business response message, by the second of the PDU sessions that itself is preserved Contextual information is updated to the first contextual information, sends response message to access network equipment, which includes the PDU meetings The session identification of words.

UE includes the correspondence of the session identification of PDU sessions and the contextual information of PDU sessions, and UE is establishing PDU The second contextual information of the PDU sessions is obtained when session, the second contextual information includes the address information of UE, can also include The session identification of the PDU sessions and the second contextual information are corresponded to the session mark for being stored in PDU sessions by the contents such as Qos rules In the correspondence of the contextual information of knowledge and PDU sessions.

This step can be：UE receives the notification message and the business response message, and the PDU is extracted from the notification message The session identification of session and the first contextual information, according to the session identification of the PDU sessions, from the session identifications of PDU sessions with The second contextual information that the PDU sessions are obtained in the contextual information of PDU sessions believes the second context of the PDU sessions Breath is updated to the first contextual information.

Wherein, which may include PDU session modification request NAS messages, and UE can be asked in the PDU session modifications Ask the operation that this step is executed under the triggering of NAS message.

If the first contextual information further includes Qos rules, UE can also reconfigure UE and access according to the Qos rules Then radio bearer between net equipment sends response to access network equipment by the radio bearer between access network equipment and disappears Breath.

Step 211：Access network equipment receives the response message, and the tunnel generated between access network equipment and the 2nd UPF exists The tunnel information of access network equipment side, it includes that the session identification of the PDU sessions and the tunnel of access network equipment side are believed to be sent to AMF The response message of breath.

The tunnel information of the access network equipment side of generation includes that the device identification of access network equipment and the tunnel are accessing net The Endpoint ID of equipment side.The session identification for the PDU sessions that access network equipment can also include according to the response message obtains The contextual information of the PDU sessions, the access that the tunnel for the access network equipment side which includes is updated to generate The tunnel information of net equipment side.

Step 212：AMF receives the response message, and the response message is forwarded to SMF.

Step 213：SMF receives the response message, the tunnel information of access network equipment side is sent to the 2nd UPF, to itself The contextual information of the PDU sessions preserved is updated.

Specifically, SMF receives the response message, and session identification and the access of the PDU sessions are extracted from the response message The tunnel information of net equipment side sends the tunnel information of access network equipment side to the 2nd UPF, according to the session mark of the PDU sessions Know, the context of the PDU sessions is obtained from the correspondence of the contextual information of the session identification and PDU sessions of PDU sessions The device identification of information, the first UPF that the contextual information by the PDU sessions includes replaces with the device identification of the 2nd UPF.

After 2nd UPF receives the tunnel information of the access network equipment side, the tunnel letter of the access network equipment side can be preserved The user plane path of breath, such PDU sessions becomes the path between UE and the 2nd UPF.

SMF can also notify the first UPF, make the tunnel between the first UPF the first UPF preserved and access network equipment Tunnel information delete.

In the present embodiment, after SMF selects two UPF, common business is asked in flow or position update flow Signalling interactive process carries out user plane gravity treatment, and required Signalling exchange number of steps is generally less than 10 steps, is less than existing institute The Signalling exchange number of steps needed, so as to reduce the consumption of time delay and signal resource.

In one embodiment of the application, since when UE executes service request flow or position update flow, SMF is obtained The conversation modes of PDU sessions, the position of UE or the required professional abilities of UE for taking UE, the conversation modes be preset mode with And it when the position of UE or the required professional abilities of UE exceed the service range of corresponding first UPF of the PDU sessions, is selected as 2nd UPF of UE services, sends a notification message to access network equipment and UE, and access network equipment and UE is asked to receive the notification message The contextual information of the PDU sessions preserved respectively to itself afterwards is updated, to realize the user plane path of the PDU sessions UE is updated to the path of the 2nd UPF.Since directly mode updates by the way of selecting the 2nd UPF and update contextual information The user plane path of the PDU sessions, and the required signal resource of this method is less, so as to reduce time delay and signal resource Consumption.

Referring to Fig. 3, the embodiment of the application provides a kind of method of user plane gravity treatment, this method can be applied to as The network architecture shown in Fig. 1-1 or Fig. 1-2.This method can be applied in switching over flow for UE, in the position of UE or Required professional ability executes user plane gravity treatment when exceeding the service range of the first UPF, and detailed implementation includes：

Step 301：Access network equipment obtains position and the UE of UE when UE is switched to itself from source access network equipment PDU sessions session identification.

It is switching flow that UE is switched to the flow of access network equipment from source access network equipment.Switch over flow it Before, there is connection between connected state, with source access network equipment in the state that UE is in.Due to the movement of UE so that the source at UE The signal quality of access network equipment is poor, and source access network equipment is that UE selects access network equipment, and is cut to access network equipment transmission Change request.

Access network equipment receives the switching request, and the PDU meetings of UE are obtained by the Xn interfaces between the access network equipment of source The session identification and contextual information of words, the contextual information include source access network equipment first UPF corresponding with the PDU sessions Between tunnel in the tunnel information of the first sides UPF and tunnel information in source access network equipment side, by the PDU sessions of acquisition Session identification and contextual information correspond to be stored in PDU sessions session identification it is corresponding with the contextual information of PDU sessions In relationship.

Access network equipment is also established with UE and is connected, and makes its cell for including of UE access and TA, and obtain the position of UE, UE Position can be UE access cell cell information or access TA TAI information.The cell information can be the cell Cell ID, the coverage area etc. of cell, the TA information can for the TA TAI, TA coverage area etc..

Step 302：Access network equipment generates tunnel information of the tunnel in access network equipment side of the PDU sessions, is sent out to AMF Send the path switching message of the tunnel information of position including UE, the session identification of the PDU sessions and the access network equipment side.

Tunnel information of the tunnel of the PDU sessions in access network equipment side includes device identification and tunnel of access network equipment Endpoint ID of the road in access network equipment side.

Access network equipment can also be according to the session identification of the PDU sessions, from session identification and the PDU sessions of PDU sessions Contextual information correspondence in obtain the contextual informations of the PDU sessions, the contextual information by the PDU sessions includes Source access network equipment side tunnel information be updated to generate access network equipment side tunnel information.

Step 303：AMF receives the path switching message, and conversation request message, the conversation request message packet are sent to SMF Include the position of UE, the session identification and access network equipment side of the PDU sessions tunnel information.

Wherein, AMF by way of conversation request message to SMF send the position of UE, the PDU sessions session identification and The tunnel information of access network equipment side, only a kind of example provided in this embodiment, can also pass through other in actual implementation Mode to SMF send the position of UE, the PDU sessions session identification and access network equipment side tunnel information.For example, AMF can With directly to SMF send the position of UE, the PDU sessions session identification and access network equipment side tunnel information, can be to SMF Send the data packet for the tunnel information for including the position of UE, the session identification of the PDU sessions and access network equipment side, the data packet It can be TCP packets or UDP packets etc., or session identification and the access of the position, the PDU sessions that carry UE can be sent to SMF The signaling etc. of the tunnel information of net equipment side, just differ an illustration herein.

Step 304：SMF receives the conversation request message, is determined whether to select UPF for UE according to the conversation request message, If so, executing step 305.

The contextual information includes the equipment that the conversation modes of the PDU sessions and the user plane path of the PDU sessions pass through The information such as device identification.The equipment that the user plane path of the PDU sessions passes through includes UE, source access network equipment and UE corresponding The equipment such as the first UPF, thus the contextual information of the PDU sessions include the device identification of UE, source access network equipment equipment mark Know the device identification with the first UPF.

This step can be：SMF receives the conversation request message, which carries the position of UE, the PDU meetings The tunnel information of the session identification and access network equipment side of words, according to the session identification of the PDU sessions, from the session of PDU sessions Mark and the contextual information that the PDU sessions are obtained in the correspondence of the contextual information of PDU sessions；From the PDU sessions Device identification and the conversation modes that corresponding first UPF of the PDU sessions is extracted in contextual information, according to the equipment of the first UPF Mark obtains the service range of the first UPF, if the conversation modes are preset mode and service of the position beyond the first UPF of UE It is determined as UE selections UPF when range.

The correspondence of the service range of device identification and UPF that can also be including UPF in SMF.So obtaining the first UPF The operation of service range can be：

The device identification for the source access network equipment that the contextual information of the PDU sessions includes can also be revised as by SMF The device identification of the access network equipment.

Step 305：SMF is selected as the 2nd UPF of UE services, establishes the tunnel between the 2nd UPF and access network equipment, obtains It takes the tunnel in the tunnel information of the 2nd sides UPF and sends to the 2nd UPF the tunnel information of access network equipment side.

Specifically, SMF can be selected from the UPF that the correspondence of the service range of the device identification and UPF of UPF includes It selects the UPF for the position that service range includes UE and/or service range is selected to meet the UPF of the required professional abilities of UE, will select The UPF selected is as the 2nd UPF；By being interacted with the 2nd UPF, the signaling plane established between the 2nd UPF connects, and generates the Tunnel between two UPF and access network equipment is connected in the tunnel information of the 2nd sides UPF by the signaling plane between the 2nd UPF The tunnel information for sending the 2nd sides UPF to the 2nd UPF is connect, the tunnel between the 2nd UPF and access network equipment is established to realize, with And the tunnel information of access network equipment side is sent to the 2nd UPF.

The tunnel information of 2nd sides UPF includes endpoint mark of the device identification of the 2nd UPF with the tunnel in the 2nd sides UPF Know, which can be SMF distribution.2nd UPF preserves access net after receiving the tunnel information of access network equipment side The tunnel information of equipment side.

The device identification for the first UPF that the contextual information of the PDU sessions includes can also be revised as second by SMF The device identification of UPF.

Step 306：SMF obtains the first contextual information, and the first contextual information includes the address information that SMF is UE distribution Or the 2nd UPF be UE distribution address information.

SMF can also be retrieved as the Qos rules of UE services after selecting the 2nd UPF from PCF.

Step 307：SMF sends a notification message to AMF, which includes the session identification of the PDU sessions, on first The tunnel information of context information and the 2nd sides UPF.

Step 308：AMF receives the notification message, sends the notification message to access network equipment and path switching response disappears Breath.

It is responses of the AMF to the UE path switching messages sent that the path, which switches response message,.

In the present embodiment, AMF sends the notification message to access network equipment and path switches response message sequencing It is not limited.In actual implementation, AMF can send the notification message to access network equipment simultaneously and path switching response disappears Breath, i.e. AMF waitings send the notification message to access network equipment simultaneously after receiving the notification message and path switching response disappears Breath；AMF first can send path switching response message and then send the notice to access network equipment again to access network equipment to disappear Breath, for example, AMF after receiving path switching message, can switch response message to access network equipment transmitting path, receive After the notification message sent to SMF the notification message is sent to access network equipment；Alternatively, AMF can first be sent out to access network equipment The notification message is given then to switch response message to access network equipment transmitting path again.

Step 309：Access network equipment receives the notification message and path switching response message, by the first sides UPF of preservation Tunnel information be updated to the tunnel informations of the 2nd sides UPF that the notification message includes, send the notification message to UE.

This step can be：Access network equipment receives the notification message and path switching response message, from the notification message The tunnel information of the middle session identification and the 2nd sides UPF for extracting the PDU sessions, according to the session identification of the PDU sessions, from PDU The session identification of session contextual information corresponding with the PDU sessions are obtained in the contextual information of PDU sessions, by the PDU meetings The tunnel information for the first sides UPF that the contextual information of words includes is updated to the tunnel information of the 2nd sides UPF, and it is logical to send this to UE Know message.

Step 310：UE receives the notification message, and the second contextual information of the PDU sessions that itself is preserved is updated to First contextual information sends response message to access network equipment, which includes the session identification of the PDU sessions.

This step can be：UE receives the notification message, extracted from the notification message PDU sessions session identification and First contextual information, according to the session identification of the PDU sessions, the context of session identification and PDU sessions from PDU sessions is believed Second contextual information of the PDU sessions is updated to the first context by the second contextual information that the PDU sessions are obtained in breath Information.

If the first contextual information further includes Qos rules, UE can also reconfigure UE and access according to the Qos rules Then radio bearer between net equipment is answered by the radio bearer between access network equipment to the transmission of access network equipment equipment Answer message.

Step 311：Access network equipment receives the response message, includes answering for the session identification of the PDU sessions to AMF transmissions Answer message.

The response message can also include tunnel of the tunnel between access network equipment and the 2nd UPF in access network equipment side Information.Wherein, at this moment, the tunnel information of access network equipment side may change, it is also possible to not change, and not occur The possibility of variation is larger.

Step 312：AMF receives the response message, and the response message is forwarded to SMF.

Step 313：SMF receives the response message.

In the present embodiment, it after SMF selects two UPF, is carried out with regard to sharing the signalling interactive process in switching flow User plane gravity treatment, and required Signalling exchange number of steps is generally less than 10 steps, is less than existing required Signalling exchange step Number, so as to reduce the consumption of time delay and signal resource.

In one embodiment of the application, by when executing switching flow, SMF obtains the session mould of the PDU sessions of UE The position of formula, UE is preset mode in the conversation modes and exceeds corresponding first UPF's of the PDU sessions in the position of UE When service range, it is selected as the 2nd UPF of UE services, is sent a notification message to access network equipment and UE, asks access network equipment The contextual information that the PDU sessions preserved respectively to itself after the notification message are received with UE is updated, should with realization The user plane path of PDU sessions is updated to UE to the path of the 2nd UPF.Due to directly using above and below selecting the 2nd UPF and updating The mode mode of literary information updates the user plane path of the PDU sessions, and the required signal resource of this method is less, so as to To reduce the consumption of time delay and signal resource.

Referring to Fig. 4, one embodiment of the application provides a kind of device 400 of user plane gravity treatment, and described device 400 can Think the SMF in Fig. 1-1, Fig. 1-2, Fig. 2 or embodiment illustrated in fig. 3, including：

Receiving unit 401, the session identification of the PDU sessions of position and UE for receiving UE；

Processing unit 402, for the conversation modes in the corresponding PDU sessions of the session identification for preset mode and in UE Position or the required professional abilities of UE exceed corresponding first UPF of the PDU sessions service range when, by the PDU sessions User plane path be revised as UE to the path between the 2nd UPF, the 2nd UPF is other UPF in addition to the first UPF.

In a possible realization method, receiving unit 401, for receive access network equipment transmission UE position and UE PDU sessions session identification.

Wherein, the position of UE and session identification can be that access network equipment disappears in the service request NAS for receiving UE transmissions It is sent after breath or location update message.UE sends service request NAS message and indicates that UE executes service request flow, and UE sends position It sets new information and indicates UE execution positions more new technological process, so the device 400 can be in service request flow or location updating stream The operation of user plane gravity treatment is executed in journey.Detailed implementation about the content can be with the step in implementation column shown in Fig. 2 Related content in 201 to 203.Alternatively,

The position of UE and session identification can also be that UE is being switched to access net by access network equipment from source access network equipment It is sent when equipment.The flow that UE is switched to access network equipment from source access network equipment is that UE executes switching flow, so should Device 400 can execute the operation of user plane gravity treatment in switching flow.Detailed implementation about the content may refer to The related content in step 301 to 303 in implementation column shown in Fig. 2, is no longer described in detail herein.

In one possible implementation, the session mark of the position and the PDU sessions of UE is received in receiving unit 401 After knowledge, processing unit 402 can be used for the session identification according to the PDU sessions, from session identification and the PDU sessions of PDU sessions Contextual information correspondence in obtain the contextual informations of the PDU sessions；It is carried from the contextual information of the PDU sessions Device identification and the conversation modes for taking corresponding first UPF of the PDU sessions obtain the first UPF according to the device identification of the first UPF Service range be selected as UE if the position that the conversation modes are preset mode and UE exceeds the service range of the first UPF 2nd UPF of service；Alternatively, the required professional abilities of UE are also obtained, if the conversation modes are for preset mode and in UE When required professional ability exceeds the service range of the first UPF, it is selected as the 2nd UPF of UE services.About the contents of the section Detailed implementation, may refer to embodiment illustrated in fig. 2 step 204 and 205 or embodiment illustrated in fig. 3 step 304 and Related content in 305, is no longer described in detail herein.

In one possible implementation, referring to Fig. 4, which further includes transmission unit 403；

Processing unit 402, for by establishing the tunnel between the 2nd UPF and access network equipment, obtaining the tunnel The tunnel information of two sides UPF, the access network equipment are the access network equipment of UE access；The first contextual information is obtained, on first Context information includes at least the address information that the device 400 is UE distribution or the address information that the 2nd UPF is UE distribution；About this Content may refer to the step 205 of embodiment illustrated in fig. 2 to 206 or embodiment illustrated in fig. 3 step 305 and 306 in it is related Content is no longer described in detail herein.

Transmission unit 403, for sending a notification message to access network equipment, which includes the session identification, The tunnel information of one contextual information and the 2nd sides UPF, the notification message are used for the session that the access network equipment is preserved The tunnel information for identifying corresponding first sides UPF is updated to the tunnel information of the 2nd sides UPF, and the meeting for preserving UE Words identify corresponding second contextual information and are updated to the first contextual information.It may refer to implement shown in Fig. 2 about this content Example step 207 and 210 or embodiment illustrated in fig. 3 step 307 and 310 in related content, be no longer described in detail herein.

It in one possible implementation, can be in service request flow or position update flow for the device 400 When the case where middle execution user plane reselection operation, receiving unit 401 is additionally operable to receive the response message that access network equipment is sent, The response message includes tunnel information of the tunnel between access network equipment and the 2nd UPF in access network equipment side；Transmission unit 403, it is additionally operable to send the tunnel information of access network equipment side to the 2nd UPF.Embodiment illustrated in fig. 2 is may refer to about this content Step 210 and 213.

In one possible implementation, user plane gravity treatment behaviour can be executed in switching flow for the device 400 When the case where making, receiving unit 401 is additionally operable to receive the corresponding tunnel of PDU sessions of access network equipment transmission in access net The tunnel information of equipment side；Transmission unit 403 is additionally operable to send the tunnel information of access network equipment side to the 2nd UPF.About this Content may refer to the related content in the step 303 and 305 of embodiment illustrated in fig. 3, no longer be described in detail herein.

In one embodiment of the application, by the conversation modes for preset mode and in the position of UE or UE institutes When the professional ability needed exceeds the service range of corresponding first UPF of the PDU sessions, it is selected as the 2nd UPF of UE services, and The user plane path of the PDU sessions is directly updated to UE to the path of the 2nd UPF.Due to directly using selection the 2nd UPF and Update the user plane path of the PDU sessions so that the required signal resource of this method is less, so as to reduce time delay and letter Enable the consumption of resource.

Referring to Fig. 5, one embodiment of the application provides a kind of device 500 of user plane gravity treatment, and described device can be with For the access network equipment in Fig. 1-1, Fig. 1-2, Fig. 2 or embodiment illustrated in fig. 3, including：

Processing unit 501, the session identification of the PDU sessions of position and UE for obtaining UE；

Transmission unit 502, for sending the position and the session identification to SMF；

Receiving unit 503, for receive SMF in the position or the required professional abilities of UE beyond PDU sessions it is corresponding The notice that the service range of first UPF and the conversation modes of the corresponding PDU sessions of the session identification are sent when being preset mode Message, the notification message include that the tunnel between the first contextual information, the session identification and the 2nd UPF and the device 500 exists The tunnel information of 2nd sides UPF, the first contextual information includes the address information that SMF is UE distribution or the 2nd UPF is UE distribution Address information, the 2nd UPF is other UPF in addition to the first UPF；

Processing unit 501 is additionally operable to for the tunnel information of the first sides UPF preserved to be updated to the tunnel letter of the 2nd sides UPF Corresponding second contextual information of the session identification that UE is preserved is updated to the first contextual information by breath and notice UE.

Wherein, processing unit 501 obtains the position and the detailed process of the session identification may refer to embodiment illustrated in fig. 2 In step 201 and 202 and the step 301 in embodiment illustrated in fig. 3 and the related content in 302, herein no longer specifically It is bright.

And processing unit 501 updates tunnel information and the detailed process of the first contextual information may refer to shown in Fig. 2 Step 209 in embodiment and 210 and the step 309 in embodiment illustrated in fig. 3 and the related content in 310, herein no longer It is described in detail.

In one possible implementation, receiving unit 503 are additionally operable to receive the business request information that UE is sent, should Business request information carries the session identification of the PDU sessions of UE；

Processing unit 501, the position for obtaining UE under the triggering of the service request NAS message；

Transmission unit 502, for sending the business request information for carrying the session identification and the position to AMF, so that AMF The session identification and the position are sent to SMF.

Wherein, the business request information that receiving unit 503 receives can be that UE is sent when UE executes service request flow Service request NAS message or in UE execution position more new technological process UE send location update message.About the detailed of this content Thin realization process may refer to the related content in the step 201 in implementation column shown in Fig. 2 to 203, no longer be described in detail herein.

In one possible implementation, processing unit 502, for UE to be switched to the dress from source access network equipment When setting 500, obtains the position of UE and obtain the session identification of the PDU sessions of UE from the access network equipment of source；

Transmission unit 502, for AMF transmitting path handover requests, the path switching message carry the session identification and The position, so that AMF sends the session identification and the position to SMF.

Wherein, when UE executes switching flow, UE is switched to the device 500 by processing unit 502 from source access network equipment, Transmission unit 502 is to AMF transmitting path handover requests.About the detailed implementation of this content, may refer to implement shown in Fig. 3 The related content in step 301 and 302 in example, is no longer described in detail herein.

In one possible implementation, which also carries the corresponding tunnel of PDU sessions in the dress Set the tunnel information of 500 sides；

Processing unit 501, be additionally operable to obtain the corresponding tunnel of PDU sessions 500 side of device tunnel information.

In one possible implementation, transmission unit 502 are additionally operable to send a notification message to UE, the notification message Carry the session identification and the first contextual information so that UE by corresponding second contextual information of the session identification of preservation more It is newly the first contextual information；

Receiving unit 503 is additionally operable to receive the response message of UE transmissions；

Transmission unit 502 is additionally operable to send the response message to AMF, which carries the device 500 and second Tunnel between UPF 500 side of device tunnel information so that AMF sends the tunnel information of 500 side of device to SMF.

In one embodiment of the application, due to SMF in the position or the required professional abilities of UE exceed PDU sessions The service range and the session identification corresponding conversation modes of corresponding first UPF selected when being preset mode the 2nd UPF for UE is serviced；The notification message that SMF is sent is received by receiving unit 3 in this way, which includes the first contextual information, is somebody's turn to do Tunnel between session identification and the 2nd UPF and the device 500 is in the tunnel information of the 2nd sides UPF, the first contextual information packet Include the address information that SMF is UE distribution or the address information that the 2nd UPF is UE distribution；Through the processing unit by the first of preservation Session identification corresponding second that the tunnel information of the sides UPF is updated to the tunnel information of the 2nd sides UPF and will be preserved in UE Contextual information is updated to the first contextual information.Due to directly changing the user plane road of the PDU sessions using newer mode Diameter so that the required signal resource of this method is less, so as to reduce the consumption of time delay and signal resource.

Referring to Fig. 6, one embodiment of the application provides a kind of device 600 of user plane gravity treatment, and described device can be with For the UE in Fig. 1-1, Fig. 1-2, Fig. 2 or embodiment illustrated in fig. 3, including：

Receiving unit 601, the notification message sent for receiving access network equipment forwarding SMF, which includes meeting Words mark and the first contextual information, the first contextual information includes the address information that SMF is the device 600 distribution or UPF is The address information of the device 600 distribution, which is the UPF of SMF gravity treatments；

Processing unit 602, corresponding second contextual information of the session identification for being preserved are updated to first Context information.

Wherein, the detailed process of the reception of receiving unit 601 notification message may refer to the step in embodiment illustrated in fig. 2 Related content in related content in 209 and 210 or the step 309 in embodiment shown in Figure 3 and 310, herein no longer It is described in detail.

And processing unit 602 is updated to the detailed process of the first contextual information and may refer in embodiment illustrated in fig. 2 Step 210 in related content or the related content in step 310 in embodiment shown in Figure 3, herein no longer in detail Explanation.

In one possible implementation, the first contextual information further includes Qos rules；

Processing unit 602 is additionally operable to be reconfigured according to the Qos rules wireless between the device 600 and access network equipment Carrying.

In one possible implementation, which further includes：

Transmission unit 603, for sending service request non access stratum NAS message, service request NAS to access network equipment Message includes the session identification, which sends the session identification and the device for access network equipment to SMF 600 position；Alternatively, sending location update message to access network equipment, which includes the session identification, the position Set the position that new information sends the session identification and the device 600 for access network equipment to SMF.

Wherein, transmission unit 603 sends service request non access stratum NAS message and the detailed process of location update message can With the related content in the step 201 in embodiment shown in Figure 2, no longer it is described in detail herein.

In one embodiment of the application, the notification message sent after selecting the 2nd UPF due to receiving SMF should Notification message includes session identification and the first contextual information, and the first contextual information includes the ground that SMF is the device 600 distribution Location information or the address information that the 2nd UPF is the device 600 distribution, so through the processing unit by the session identification pair of preservation The second contextual information answered is updated to the first contextual information.Due to directly changing the PDU sessions using newer mode User plane path so that the required signal resource of this method is less, so as to reduce the consumption of time delay and signal resource.

Fig. 7 is another schematic diagram of the device 700 for the user plane gravity treatment that one embodiment of the application provides.The device 700 can To be the SMF in Fig. 1-1, Fig. 1-2, Fig. 2 and any embodiment shown in Fig. 3, can be used for executing Fig. 2, side shown in Fig. 3 Method.As shown in fig. 7, the device 700 includes：Input interface 701, output interface 702, processor 703 and memory 704.This is defeated Incoming interface 701, output interface 702, processor 703 and memory 704 can be connected by bus system 705.

The memory 704 includes program, instruction or code for storing.The processor 703, for executing described deposit Program, instruction in reservoir 704 or code, to control, input interface 701 receives signal, control output interface 702 sends signal And each step and function that the SMF in the embodiment corresponding to the above-mentioned Fig. 2 and Fig. 3 of implementation is implemented, it is no longer superfluous herein It states.The specific implementation mode of above-mentioned input interface 701, processor 703 and output interface 702 can be referred to accordingly in above-mentioned Fig. 4 Receiving unit 401, processing unit 402 and transmission unit 403 illustrate, and which is not described herein again.

Fig. 8 is another schematic diagram of the device 800 for the user plane gravity treatment that one embodiment of the application provides.The device 800 can To be the access network equipment in Fig. 1-1, Fig. 1-2, Fig. 2 and any embodiment shown in Fig. 3, can be used for executing Fig. 2, Fig. 3 institutes The method shown.As shown in figure 8, the device 800 includes：Input interface 801, output interface 802, processor 803 and memory 804.The input interface 801, output interface 802, processor 803 and memory 804 can be connected by bus system 805.

The memory 804 includes program, instruction or code for storing.The processor 803, for executing described deposit Program, instruction in reservoir 804 or code, to control, input interface 801 receives signal, control output interface 802 sends signal And each step and function that the access network equipment in the embodiment corresponding to the above-mentioned Fig. 2 and Fig. 3 of implementation is implemented, herein It repeats no more.The specific implementation mode of above-mentioned processor 803, input interface 801 and output interface 802 can accordingly refer to above-mentioned Processing unit 401 in Fig. 5, receiving unit 503 and transmission unit 502 illustrate, and which is not described herein again.

Fig. 9 is another schematic diagram of the device 900 for the user plane gravity treatment that one embodiment of the application provides.The device 900 can To be the UE in Fig. 1-1, Fig. 1-2, Fig. 2 and any embodiment shown in Fig. 3, can be used for executing Fig. 2, method shown in Fig. 3. As shown in figure 9, the device 900 includes：Input interface 901, output interface 902, processor 903 and memory 904.The input connects Mouth 901, output interface 902, processor 903 can be connected with memory 904 by bus system 905.

The memory 904 includes program, instruction or code for storing.The processor 903, for executing described deposit Program, instruction in reservoir 904 or code, to control, input interface 901 receives signal, control output interface 902 sends signal And each step and function that the UE in the embodiment corresponding to the above-mentioned Fig. 2 and Fig. 3 of implementation is implemented, it is no longer superfluous herein It states.The specific implementation mode of above-mentioned input interface 901, output interface 902 and processor 903 can be referred to accordingly in above-mentioned Fig. 7 Receiving unit 601, processing unit 602 and transmission unit 503 illustrate, and which is not described herein again.

One of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment can pass through hardware It completes, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..

The foregoing is merely the examples of the application, not to limit the application, it is all spirit herein and principle it Interior, any modification, equivalent replacement, improvement and so on should be included within the protection domain of the application.

Claims

1. a kind of method of user plane gravity treatment, which is characterized in that the method includes：

Conversation management functional SMF receives the session mark of the position of user equipment (UE) and the Packet Data Unit PDU sessions of the UE Know；

The SMF is preset mode and the UE's in the conversation modes of the corresponding PDU sessions of the session identification It, will be described when position or the required professional abilities of the UE exceed the service range of corresponding first UPF of the PDU sessions The user plane path of PDU sessions is revised as the UE to the path between the 2nd UPF.

2. the method as described in claim 1, which is characterized in that the user plane path by the PDU sessions is revised as institute UE is stated to the path between the 2nd UPF, including：

By establishing the tunnel between the 2nd UPF and access network equipment, obtain the tunnel the 2nd sides UPF tunnel Road information, the access network equipment are the access network equipment of the UE access；

Obtain the first contextual information, first contextual information include the address information that the SMF is UE distribution or 2nd UPF is the address information of UE distribution；

It sends a notification message to the access network equipment, the notification message includes the session identification, first context The tunnel information of information and the 2nd sides UPF, the notification message are used for the meeting that the access network equipment is preserved The tunnel information that words identify corresponding first sides UPF is updated to the tunnel information of the 2nd sides UPF, and is used for institute Corresponding second contextual information of the session identification for stating UE preservations is updated to first contextual information.

3. method as claimed in claim 2, which is characterized in that it is described send a notification message to the access network equipment after, Further include：

The response message that the access network equipment is sent is received, the response message includes the access network equipment and described second The tunnel information of tunnel between UPF in the access network equipment side；

The tunnel information of the access network equipment side is sent to the 2nd UPF.

4. the method as described in claim 1, which is characterized in that the user plane path by the PDU sessions is revised as institute Before stating UE to the path between the 2nd UPF, further include：

Receive tunnel information of the corresponding tunnel of the PDU sessions in the access network equipment side of access network equipment transmission；

The method further includes：The tunnel information of the access network equipment side is sent to the 2nd UPF.

5. the method as described in claim 1, which is characterized in that the grouping of the position and the UE for receiving user equipment (UE) The session identification of data cell PDU sessions, including：

Receive the session identification of the position for the UE that access network equipment is sent and the PDU sessions of the UE, the position of the UE It is that the access network equipment is receiving the service request non access stratum NAS message or position that the UE is sent with the session identification It sets sending after new information or being sent when the UE is switched to the access network equipment from source access network equipment.

6. the method as described in claim 1, which is characterized in that the conversation modes be session and business continuance SSC patterns, The preset mode is SSC patterns 2.

7. a kind of method of user plane gravity treatment, which is characterized in that the method includes：

Access network equipment obtains the session identification of the position of user equipment (UE) and the Packet Data Unit PDU sessions of the UE；

The access network equipment sends the position and the session identification to conversation management functional SMF；

The access network equipment receives the SMF and exceeds the PDU meetings in the position or the required professional abilities of the UE The conversation modes of the service range and the corresponding PDU sessions of the session identification of talking about corresponding first UPF are default mould The notification message sent when formula, the notification message include the first contextual information, the session identification and the 2nd UPF with it is described In the tunnel information of the 2nd sides UPF, first contextual information includes that the SMF is in tunnel between access network equipment The address information of the UE distribution or the address information that the 2nd UPF is UE distribution；

Believe in the tunnel that the tunnel information of the first sides UPF of preservation is updated to the 2nd sides UPF by the access network equipment It ceases and notifies the UE that corresponding second contextual information of the session identification that the UE is preserved is updated to described first Contextual information.

8. the method for claim 7, which is characterized in that the PDU of the position and the UE for obtaining user equipment (UE) The session identification of session, including：

The business request information that the UE is sent is received, the business request information carries the session mark of the PDU sessions of the UE Know, the business request information is service request non access stratum NAS message or location update message；

The position of the UE is obtained under the triggering of the business request information；

It is described to send the position and the session identification to conversation management functional SMF, including：

The service request that the carrying session identification and the position are sent to core net access and mobile management function to ps domain AMF disappears Breath, so that the AMF sends the session identification and the position to the SMF.

9. the method for claim 7, which is characterized in that the PDU of the position and the UE for obtaining user equipment (UE) The session identification of session, including：

When the UE is switched to the access network equipment from source access network equipment, the position of the UE is obtained and from described The session identification of the PDU sessions of the UE is obtained in the access network equipment of source；

To core net access and mobile management function to ps domain AMF transmitting path handover requests, described in the path switching message carrying Session identification and the position, so that the AMF sends the session identification and the position to the SMF.

10. method as claimed in claim 9, which is characterized in that the path switching message also carries the PDU sessions and corresponds to Tunnel the access network equipment side tunnel information；

It is described to be accessed to core net with before mobile management function to ps domain AMF transmitting path handover requests, further include：

Obtain the corresponding tunnel of the PDU sessions the access network equipment side tunnel information.

11. the method for claim 7, which is characterized in that the PDU meetings for notifying the UE to preserve the UE It talks about corresponding second contextual information and is updated to first contextual information, including：

It sending a notification message to the UE, the notification message carries the session identification and first contextual information, with Make the UE that corresponding second contextual information of the session identification of preservation is updated to first contextual information；

It is described to notify the UE that corresponding second contextual information of the PDU sessions that the UE is preserved is updated to described first After contextual information, further include：

Receive the response message that the UE is sent；

The response message is sent to core net access and mobile management function to ps domain AMF, the response message carries the access Tunnel between net equipment and the 2nd UPF the access network equipment side tunnel information so that the AMF is to described SMF sends the tunnel information of the access network equipment side.

12. a kind of method of user plane gravity treatment, which is characterized in that the method includes：

User equipment (UE) receives the notification message that access network equipment forwarding conversation management functional SMF is sent, the notification message packet Session identification and the first contextual information are included, first contextual information includes the address letter that the SMF is UE distribution Breath or the address information that user plane functions UPF is UE distribution, the UPF is the UPF of the SMF gravity treatments；

Corresponding second contextual information of the session identification that the UE is preserved is updated to first contextual information.

13. method as claimed in claim 12, which is characterized in that first contextual information further includes quality of service Qos Rule；The method further includes：

The radio bearer between the UE and the access network equipment is reconfigured according to the Qos rules.

14. method as claimed in claim 12, which is characterized in that the UE receives access network equipment and forwards conversation management functional Before the notification message that SMF is sent, further include：

The UE sends service request non access stratum NAS message to access network equipment, and the service request NAS message includes described Session identification, the service request NAS message send the session identification and described for the access network equipment to the SMF The position of UE；Alternatively,

The UE sends location update message to access network equipment, and the location update message includes the session identification, described Location update message sends the position of the session identification and the UE for the access network equipment to the SMF.

15. a kind of device of user plane gravity treatment, which is characterized in that described device includes：

Receiving unit, the session identification of the Packet Data Unit PDU sessions of position and the UE for receiving user equipment (UE)；

Processing unit is used for the conversation modes in the corresponding PDU sessions of the session identification for preset mode and in institute It, will when stating the service range of the position or the required professional abilities of the UE of UE beyond corresponding first UPF of the PDU sessions The user plane path of the PDU sessions is revised as the UE to the path between the 2nd UPF.

16. device as claimed in claim 15, which is characterized in that described device further includes transmission unit；

The processing unit, for by establishing the tunnel between the 2nd UPF and access network equipment, obtaining the tunnel and existing The tunnel information of 2nd sides UPF, the access network equipment are the access network equipment of the UE access；Obtain the first context Information, first contextual information includes the address information that described device is the UE distribution or the 2nd UPF is described The address information of UE distribution；

The transmission unit, for sending a notification message to the access network equipment, the notification message includes the session mark Know, the tunnel information of first contextual information and the 2nd sides UPF, the notification message is used for the access network equipment The tunnel information of corresponding first sides UPF of the session identification preserved is updated to the tunnel of the 2nd sides UPF Information, and corresponding second contextual information of the session identification for preserving the UE are updated to described about first Literary information.

17. device as claimed in claim 16, which is characterized in that

The receiving unit is additionally operable to receive the response message that the access network equipment is sent, and the response message includes described The tunnel information of tunnel between access network equipment and the 2nd UPF in the access network equipment side；

The transmission unit is additionally operable to send the tunnel information of the access network equipment side to the 2nd UPF.

18. device as claimed in claim 17, which is characterized in that the receiving unit is additionally operable to receive access network equipment hair Tunnel information of the corresponding tunnel of the PDU sessions sent in the access network equipment side；

19. device as claimed in claim 15, which is characterized in that

The receiving unit, the session of the position of the UE for receiving access network equipment transmission and the PDU sessions of the UE Mark, the position of the UE and the session identification are that the access network equipment is non-in the service request for receiving the UE transmissions It is being sent after access layer NAS message or location update message or the UE is being switched to the access from source access network equipment It is sent when net equipment.

20. a kind of device of user plane gravity treatment, which is characterized in that described device includes：

Processing unit, the session identification of the Packet Data Unit PDU sessions of position and the UE for obtaining user equipment (UE)；

Transmission unit, for sending the position and the session identification to conversation management functional SMF；

Receiving unit exceeds the PDU sessions for receiving the SMF in the position or the required professional abilities of the UE The service range of corresponding first UPF and the conversation modes of the corresponding PDU sessions of the session identification are preset mode When the notification message that sends, the notification message includes the first contextual information, the session identification and the 2nd UPF and the dress In the tunnel information of the 2nd sides UPF, first contextual information includes that the SMF is the UE points in tunnel between setting The address information matched or the address information that the 2nd UPF is UE distribution；

The processing unit is additionally operable to for the tunnel information of the first sides UPF preserved to be updated to the tunnel of the 2nd sides UPF Road information and to notify that corresponding second contextual information of the session identification that the UE is preserved is updated to by the UE described First contextual information.

21. device as claimed in claim 20, which is characterized in that the receiving unit is additionally operable to receive what the UE was sent Business request information, the business request information carry the session identification of the PDU sessions of the UE, and the business request information is Service request non access stratum NAS message or location update message；

The processing unit, the position for obtaining the UE under the triggering of the service request NAS message；

The transmission unit carries the session identification and institute for being sent to core net access and mobile management function to ps domain AMF The business request information that rheme is set, so that the AMF sends the session identification and the position to the SMF.

22. device as claimed in claim 20, which is characterized in that the processing unit, for the UE to be accessed from source When net equipment is switched to described device, obtains the position of the UE and obtain the UE's from the source access network equipment The session identification of PDU sessions；

The transmission unit, for being accessed and mobile management function to ps domain AMF transmitting path handover requests, the path to core net Handover request carries the session identification and the position, so that the AMF sends the session identification and described to the SMF Position.

23. device as claimed in claim 22, which is characterized in that the path switching message also carries the PDU sessions pair Tunnel information of the tunnel answered in described device side；

The processing unit, be additionally operable to obtain the corresponding tunnel of the PDU sessions described device side tunnel information.

24. device as claimed in claim 20, which is characterized in that the transmission unit is additionally operable to send notice to the UE Message, the notification message carries the session identification and first contextual information, so that the UE will be described in preservation Corresponding second contextual information of session identification is updated to first contextual information；

The receiving unit is additionally operable to receive the response message that the UE is sent；

The transmission unit is additionally operable to send the response message to core net access and mobile management function to ps domain AMF, described to answer Answer message carry the tunnel between described device and the 2nd UPF described device side tunnel information so that the AMF to The SMF sends the tunnel information of described device side.

25. a kind of device of user plane gravity treatment, which is characterized in that described device includes：

Receiving unit, the notification message sent for receiving access network equipment forwarding conversation management functional SMF, the notification message Including session identification and the first contextual information, first contextual information includes the ground that the SMF is described device distribution Location information or the address information that user plane functions UPF is described device distribution, the UPF is the UPF of the SMF gravity treatments；

Processing unit, corresponding second contextual information of the session identification for being preserved are updated to described about first Literary information.

26. device as claimed in claim 25, which is characterized in that first contextual information further includes quality of service Qos Rule；

The processing unit is additionally operable to reconfigure the nothing between described device and the access network equipment according to the Qos rules Line carries.

27. device as claimed in claim 25, which is characterized in that described device further includes：

Transmission unit, for sending service request non access stratum NAS message, the service request NAS message to access network equipment Including the session identification, the service request NAS message sends the session mark for the access network equipment to the SMF Know the position with described device；Alternatively, sending location update message to access network equipment, the location update message includes described Session identification, the location update message send the session identification and the dress for the access network equipment to the SMF The position set.