CN108337705A - A kind of user plane reselecting method and device - Google Patents
A kind of user plane reselecting method and device Download PDFInfo
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- CN108337705A CN108337705A CN201810098369.9A CN201810098369A CN108337705A CN 108337705 A CN108337705 A CN 108337705A CN 201810098369 A CN201810098369 A CN 201810098369A CN 108337705 A CN108337705 A CN 108337705A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
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Abstract
The embodiment of the present invention provides a kind of user plane reselecting method and device, is related to field of communication technology, can optimizing user plane path, reduce UE service delays, ensure UE service bandwidths, to improve user experience.This method includes：SMF sends Business Stream information inquiring request to current UPF；And SMF receives the current business stream information of UE that current UPF is sent；In the case of the business stream information difference of the UE once received on business stream information current UE and SMF, SMF is redefined as the UPF that UE provides service according to business stream information current UE.
Description
Technical field
The present embodiments relate to field of communication technology more particularly to a kind of user plane reselecting methods and device.
Background technology
In a communications system, the mutual cooperation of each network element can complete user equipment (user equipment, UE) and connect
Enter network, and session is established with network.
In long term evolution (long term evolution, LTE), user plane network element (such as gateway (Gate way, GW)
Both it is responsible for session management, policy control, the signaling traffic flow (belonging to control plane) of charging etc. will also be responsible for data message forwarding
Flow (belongs to user plane), i.e., control plane is combined together with user plane, is the clothes that UE is provided when UE and network establish session
The user plane of business is once it is determined that later, in subsequent conversation procedure, which no longer changes, in above-mentioned LTE system, UE
After establishing session with network, if the business that UE is accessed changes, for example, from the service switching of visited site 1 to access
When the business in area 2, since the user plane serviced for UE can not change, the process that UE passes through the business of the user plane visited site 2
In, network delay may be bigger, and since path detour UE may occupy more Internet resources.
In 5G communication systems, control plane network element and user plane network element have been kept completely separate, in the session that UE and network are established
Later, the user plane network element (such as user plane functions (user plane function, UPF)) of service is provided for UE to be changed
Become, you can with gravity treatment UPF, UPF reselecting methods are also in research at present.
Invention content
The application provides a kind of user plane reselecting method and device, can optimizing user plane path, reduce UE service delays,
Ensure UE service bandwidths, to improve user experience.
In order to achieve the above objectives, the application adopts the following technical scheme that：
In a first aspect, providing a kind of user plane reselecting method, this method includes：SMF sends business stream information to current UPF
Inquiry request；SMF receives the current business stream information of UE that current UPF is sent, one on business stream information current UE and SMF
In the case of the business stream information difference of the UE of secondary reception, SMF is redefined as UE offers according to business stream information current UE
The UPF of service.
Second aspect provided a kind of SMF, which includes sending module, receiving module and determining module.Wherein, it sends
Module, for sending Business Stream information inquiring request to current UPF；Receiving module, it is current for receiving the UE that current UPF is sent
Business stream information；Determining module, the business of the UE for once being received on UE current service traffics letter and receiving module
In the case that flow letter is different, according to the current business stream informations of UE, it is redefined as the UPF that UE provides service.
The third aspect provides a kind of SMF, which may include processor and the memory that is of coupled connections with the processor.
The memory can be used for storing computer instruction.When the SMF is run, which executes the calculating of memory storage
Machine instructs, so that the SMF executes the user plane reselecting method of above-mentioned first aspect.
Fourth aspect provides a kind of computer readable storage medium, including computer instruction, when the computer instruction exists
When being run on SMF so that the SMF executes the user plane reselecting method described in above-mentioned first aspect.
5th aspect, provides a kind of computer program product including computer instruction, when the computer program product exists
When the upper operation of SMF so that the user plane reselecting method described in the above-mentioned first aspect of execution of the SMF.
User plane reselecting method provided by the present application, SMF can send Business Stream information inquiring request, SMF to current UPF
After receiving the current business stream information of UE that current UPF is sent, business stream information current UE with once received on SMF
UE business stream information difference in the case of, SMF is redefined as UE and provides service according to business stream information current UE
UPF.Compared with prior art, since SMF can determine whether that being redefined as UE provides according to the current business stream informations of UE
The UPF of service, and in the case where needing to redefine UPF, according to UE, current business stream information redefines one
UPF, in this way, can reducing UE service delays with optimizing user plane path, ensureing UE service bandwidths, to improve user experience.
Description of the drawings
Fig. 1 is a kind of configuration diagram of communication system provided in an embodiment of the present invention；
Fig. 2 is a kind of hardware schematic of server provided in an embodiment of the present invention；
Fig. 3 is a kind of user plane reselecting method schematic diagram one provided in an embodiment of the present invention；
Fig. 4 is a kind of user plane reselecting method schematic diagram two provided in an embodiment of the present invention；
Fig. 5 is a kind of user plane reselecting method schematic diagram three provided in an embodiment of the present invention；
Fig. 6 is a kind of structural schematic diagram one of UPF provided in an embodiment of the present invention；
Fig. 7 is a kind of structural schematic diagram two of UPF provided in an embodiment of the present invention.
Specific implementation mode
User plane reselecting method provided in an embodiment of the present invention and device are described in detail below in conjunction with the accompanying drawings.
Term " first " and " second " in the specification and claims of the embodiment of the present invention etc. are for distinguishing not
Same object, rather than for the particular order of description object.For example, the first session and the second session etc. are for distinguishing difference
Session, rather than for describing the particular order of session.
In embodiments of the present invention, " illustrative " or " such as " etc. words for indicate make example, illustration or explanation.This
Be described as in inventive embodiments " illustrative " or " such as " any embodiment or design scheme be not necessarily to be construed as comparing
Other embodiments or design scheme more preferably or more advantage.Specifically, use " illustrative " or " such as " etc. words purport
Related notion is being presented in specific ways.
In the description of the embodiment of the present invention, unless otherwise indicated, the meaning of " plurality " is refer to two or more.Example
Such as, multiple processing units refer to two or more processing units；Multiple systems refer to two or more systems.
In addition, the term " comprising " and " having " being previously mentioned in description of the invention and their any deformation, it is intended that
It is to cover and non-exclusive includes.Such as process, method, system, product or the equipment for containing series of steps or unit do not have
It is defined in the step of having listed or unit, but further includes the steps that optionally that other are not listed or unit, or optionally
Further include for the intrinsic other steps of these processes, method, product or equipment or unit.
First to the present embodiments relate to some concepts illustrate.
The conversational services continuity pattern of UE：In 5G systems for the different application of UE or the different companies of service
Continuous property demand, in the related protocol in 5G systems, it will words service continuity is divided into pattern one, pattern two and pattern three, has
Body is as follows：
Pattern one：As Packet Data Unit (packet data unit, PDU) session when PDU session establishments
Anchor point (the PDU session anchor points in the embodiment of the present invention are UPF) is no matter which kind of access technology of UE successful access Web vector graphics (compares
Such as access style and cell), during the PDU session persistences, PDU session anchor points, i.e. UPF is remained unchanged.
Pattern two：UE does not require to ensure that the continuity (such as downloading service) of session, PDU session anchor points change (i.e. session
Anchor point relocates) when, network can trigger PDU sessions release, and instruction UE initiates a new PDU session to same data network and builds
Vertical process, when establishing new session, can select a new UPF as PDU session anchor points.
Pattern three：UE requires to ensure the continuity (such as talk business) of session, in this case, UE and current
It is new by one before connection (session established based on current PDU session anchor points) between PDU session anchor points is released
PDU session anchor points establish connections of the UE to identical data network, then under certain conditions, the session before discharging.
Based on background technology there are the problem of, the embodiment of the present invention provides a kind of user plane reselecting method and device, application
In 5G systems, conversation management functional (session management function, SMF) can according to the business stream information of UE,
Gravity treatment UPF is determined the need for, in the case where needing gravity treatment UPF, SMF is that UE redefines UPF, can be with optimizing user plane road
Diameter reduces UE service delays, ensures UE service bandwidths, to improve user experience.
User plane reselecting method provided in an embodiment of the present invention can be applied in wireless communication system, the wireless communication system
System can be the system (hereinafter referred to as 5G systems) etc. using the 5th third-generation mobile communication technology, as shown in Figure 1, real for the present invention
The configuration diagram of the 5G systems of example offer is provided.In Fig. 1, which may include：UE 10, Radio Access Network
(radio access network, RAN) or access network (access network, AN) 11 (can be denoted as (R) AN
11), UPF 12, access and mobile management function (access and mobility management function, AMF) 13,
SMF 14, policy control functions (policy control function, PCF) 15, authentication service function
(authentication server function, AUSF) 16, network storage function (NF respository function,
) 17 NRF (wherein, NF is network function (network function, NF)), application function (application function,
AF) 18, ability opens function (network exposure function, NEF) 19, uniform data management (unified data
Management, UDM) 20 and network slice selection function (network slice selection function, NSSF)
21 etc..In general, either the connection between service function can be to be wirelessly connected or have to above-mentioned each equipment in practical applications
Line connects, and intuitively indicates the connection relation between each equipment for convenience, is illustrated using solid line in Fig. 1.
(R)AN 11：Network is accessed for UE 10, (R) AN 11 may include base station, evolved base station (evolved
Node base station, eNB), it is next-generation base station (next generation node base station, gNB), novel
Radio base station (new radio eNB), macro base station, micro-base station, high frequency base station send and receive point (transmission
And reception point, TRP)), non-3GPP access network (such as WiFi) and/or non-3 gpp interworking function (non-3GPP
Interworking function, N3IWF) etc. equipment.
UPF 12：For handle with the relevant event of user plane, such as forwarding or routing data packet, detection data packet, on
Report portfolio, processing service quality (quality of service, QoS), Lawful Interception, storage downlink data packet etc..
AMF 13：For connection management, mobile management, registration management, access authentication and mandate, accessibility management and
Safe context management etc..
SMF 14：For session management (such as foundation, modification and release of session), the selection of UPF 12 and control, industry
Business and the selection of conversation continuity (service and session continuity) pattern and roaming service etc..
PCF 15：For generating strategy, providing policy control service and the relevant signing information of acquisition strategy decision etc..
AUSF 16：User information is obtained for being interacted with UDM 20, and execution and the relevant function of certification, such as generated
Intermediate key etc..
NRF 17：For service discovery, safeguard the available exemplary network function text of network function and these networks
The service that function is supported.
AF 18：It is interacted with 3GPP core nets, business or server is provided, for example, can be interacted with NEF 19.
NEF 19：Various businesses and ability that the open 3GPP network functions of safety provide (including contents open or to the
Tripartite opens etc.), the information that is interacted with information interact of AF 18 and internal network function of conversion or translation, such as AF services and marks
Knowledge and content, 5G core network informations (such as network slice selection assistance information etc.) etc..
UDM 20：Authentication information, the processing subscriber identity information in 3GPP Authentication and Key Agreement mechanism are handled, access is awarded
Power, registration and mobile management, signing management, short message supervision etc..
NSSF 21：For selecting one group of network slice for UE 10, determining network slice selection assistance information and determination
The AMF collection serviced for UE 10 (AMF, which integrates, refers to being the set of the multiple AMF serviced of UE 10).
Optionally, in the embodiment of the present invention, above-mentioned each function module (i.e. UPF 12, AMF 13, SMF 14, PCF 15,
AUSF 16, NRF 17, AF 18, NEF 19, UDM 20 and NSSF 21) it can integrate on the server, to realize its work(
Energy.
In the embodiment of the present invention, SMF can be integrated on one server to realize the function of SMF.Have with reference to Fig. 2
Body introduces each component parts of the server provided in an embodiment of the present invention for being integrated with SMF.As shown in Fig. 2, the server can
To include：Processor 101, memory 102 and communication interface 103 etc..
Processor 101：It is the core component of server, for the application in the operating system and server of runtime server
Program (including system application and third party application).
In the embodiment of the present invention, processor 101 be specifically as follows central processing unit (central processing unit,
CPU), general processor, digital signal processor (digital signal processor, DSP), application-specific integrated circuit
(application-specific integrated circuit, ASIC), field programmable gate array (field
Programmable gate array, FPGA) or other programmable logic device, transistor logic, hardware component or
Person its it is arbitrary combine, may be implemented or executes and various described in combination content disclosed by the embodiments of the present invention illustratively patrol
Collect box, module and circuit；Processor can also be to realize the combination of computing function, such as include one or more microprocessors
Combination, the combination etc. of DSP and microprocessor.
Memory 102：It can be used for storing software program and module, processor 101 is stored in memory 102 by operation
In software program and module, to execute server various function application and data processing.Memory 102 may include
One or more computer readable storage mediums.Memory 102 includes storing program area and storage data field, wherein storage journey
Sequence area can storage program area, the application program etc. needed at least one function, storage data field can storage server create
Data etc. may include the program of SMF in the embodiment of the present invention, in memory 102, by running the program of SMF to complete UE
Access network or UE establish session with network.
In the embodiment of the present invention, memory 102 can specifically include volatile memory (volatile memory), example
Such as random access memory (random-access memory, RAM)；The memory can also include nonvolatile memory
(non-volatile memory), such as read-only memory (read-only memory, ROM), flash memory (flash
Memory), hard disk (hard Disk drive, HDD) or solid state disk (solid-state drive, SSD)；The memory is also
It may include the combination of the memory of mentioned kind.
Communication interface 103：For the interface circuit that server is communicated with other equipment, communication interface can be transmitting-receiving
Device, transmission circuit etc. have the structure of transmission-receiving function, and communication interface includes serial communication interface and parallel communication interface.
After UE and network establish session, in conjunction with Fig. 1, as shown in figure 3, user plane gravity treatment provided in an embodiment of the present invention
Method may include S101-S103：
S101, SMF send Business Stream information inquiring request to current UPF.
In the embodiment of the present invention, above-mentioned current UPF is to provide service in the current sessions that UE is established with network for UE
UPF.The business stream information of UE may include at least one of following：UE purpose Internet protocol (internet protocol,
IP) address, the port of purpose IP address, UE IP stream application layer protocol, the medium type of UE and the upstream and downstream bandwidth of UE.
Wherein, the application layer protocol of the IP streams of UE may include the http protocol that web-browsing uses；Streaming media service uses
Real-time transport protocol (real-time transport protocol, RTP), RTCP Real-time Transport Control Protocol (real-time
Transport control protocol, RTCP), real time streaming transport protocol ((real time streaming
Protocol, RTSP) etc.；Session initiation protocol (session initiation protocol, SIP) that speech business uses,
Session Description Protocol (session description protocol, SDP) etc.；File transmits the File Transfer Protocol used
(file transfer protocol, FTP) etc.；The flashp2p agreements etc. that flash is used.The medium type of UE is that UE is current
The coded format of the business of operation, if such as UE business be video traffic, the coded format of the video can be moving image
Coded format as defined in expert group (moving picture exports group, MPEG), for example, MPEG-1, MPEG-2 or
MPEG-4 etc.；The coded format of video data may be the coded format etc. of H.26X series.
Optionally, in the embodiment of the present invention, SMF periodically can send Business Stream information inquiring request to current UPF,
To know UE business stream information situation of change, the UPF for being suitble to UE current practices is selected for UE in time.
S102, SMF receive the current business stream information of UE that current UPF is sent.
S103, in the case of the business stream information difference of the UE once received on business stream information current UE and SMF,
SMF is redefined as the UPF that UE provides service according to business stream information current UE.
In the embodiment of the present invention, after SMF gets the current business stream informations of UE, SMF determines the current industry of UE first
Whether business stream information is identical as the business stream information for the UE that the SMF last times receive, and is then determined whether again according to judging result
It is determined as the UPF that UE provides service.
In the embodiment of the present invention, UE is established with network after session, if business stream information current UE connects with the SMF last times
The business stream information of the UE of receipts is different, i.e. the business stream information of UE changes, then explanation is currently the UPF of the UE services provided
It is no longer appropriate for providing service for UE, in this case, SMF is that UE reselects UPF, and new session is established according to UPF again,
Current sessions are switched to new session, i.e., are established the service switching of UE in UE current sessions to based on the UPF redefined
New session in, can so optimize the user plane path of UE, ensure the business trouble-free operation of UE, user's body can be improved
It tests, such as after the service switching to the session established based on the UPF redefined of UE, the network delay of the business of UE can be reduced
Or save the Internet resources that the business of UE occupies.
In the embodiment of the present invention, when the conversational services continuity pattern (referring to pattern two and pattern three) of UE is different, SMF
The opportunity that UPF is redefined for UE is different, be specifically divided into following two kinds of situations (be denoted as respectively situation-A and
situation-B)：
Situation-A：
The conversational services continuity pattern of UE is pattern two, and SMF is redefined as UE according to business stream information current UE
The method of the UPF of the service of offer may include：After network discharges current sessions, SMF believes according to Business Stream current UE
Breath is redefined as the UPF that UE provides service.
Wherein, the UPF that SMF is redefined establishes next session of current sessions for UE with network.
In the embodiment of the present invention, due to UE conversational services continuity pattern be pattern two when, UE does not require session continuous
Property, thus network can discharge current sessions (i.e. releasing network be UE distribution IP address or prefix), then resettle
New session (being that UE distributes new IP address or prefix), and during establishing new session, SMF can again really
A fixed UPF that service is provided for UE.
Situation-B：
The conversational services continuity pattern of UE is pattern three, and SMF is redefined as UE according to business stream information current UE
The method of the UPF of the service of offer may include：Before network discharges current sessions, SMF believes according to Business Stream current UE
Breath is redefined as the UPF that UE provides service.
In the embodiment of the present invention, due to UE conversational services continuity pattern be pattern three when, UE require session need to have
Continuity, therefore network initially sets up new session (being that UE distributes new IP address or prefix), and establishing new meeting
During words, SMF can redefine a UPF that service is provided for UE, then discharge current sessions (i.e. releasing network again
It has been the IP address or prefix of UE distribution).
Optionally, in the embodiment of the present invention, above-mentioned IP address may include the addresses IPv4 (the i.e. fourth edition of IP address
Originally) or the addresses IPv6 (i.e. the sixth version sheet of IP address), IP prefixes can be the prefix of the addresses IPv6.
Optionally, in the embodiment of the present invention, in conjunction with Fig. 3, as shown in figure 4, can specifically pass through S103a realities in above-mentioned S103
It is existing：
S103a, in the business stream information current UE situation different from the business stream information of UE once received on SMF
Under, SMF is redefined as the UPF that UE provides service in UPF corresponding with the business stream information that UE is current.
Disposed in 5G systems be UE provide server UPF may include it is multiple, specifically can be according to the one of UE
The different characteristic deployment such as the business of the location of a little attribute information (such as type of UE, mobile phone, notebook etc.), UE, UE
Multiple and different UPF, for example, the Business Stream information according to UE is disposed in the scene of multiple UPF, the Business Stream information change of UE
When, can be that UE selects UPF corresponding with the business stream information of UE.I.e. business stream information current UE with once connect on SMF
In the case of the business stream information difference of the UE of receipts, SMF is redefined as UE and provides service according to business stream information current UE
UPF.
Illustratively, it is assumed that assisted respectively with the application layer that the IP of the purpose IP address of UE, the port of purpose IP address, UE flow
View, the upstream and downstream bandwidth of the medium type of UE, UE dispose different UPF, and as shown in table 1 below is the business stream information and UPF of UE
Correspondence example.
Table 1
| Business stream information | UPF |
| Purpose IP address 1 | UPF 1、UPF 2 |
| The port 1 of purpose IP address | UPF 3 |
| The application layer protocol of the IP streams of UE | UPF 4 |
| Medium type 1 | UPF 5、UPF 6 |
| Upstream and downstream bandwidth 1 | UPF 7、UPF 8 |
In conjunction with table 1, if the business stream information of UE is the purpose IP address of UE, purpose IP address 1 is that UE works as in above-mentioned table 1
Preceding purpose IP address, if purpose IP address current UE is different from the purpose IP address for the UE that the SMF last times receive, UE from
It is redefined as UE in UPF 1 corresponding with purpose IP address 1 and UPF 2, the UPF of service is provided, such as UPF 1 is determined as
New UPF.
Optionally, in the embodiment of the present invention, if UPF corresponding with the business stream information that UE is current includes multiple, SMF can
With from multiple UPF, arbitrary select one UPF as being newly UPF that UE provides service, SMF can also be tactful according to other
Select a UPF as new UPF from multiple UPF.
It should be noted that in following embodiments, UE and network are established based on current UPF (hereinafter referred to as the first UPF)
PDU sessions be known as current PDU sessions (below be referred to as the first session), by UE and network based on redefine UPF (with
Down be referred to as the 2nd UPF) establish PDU sessions be known as the current PDU sessions next session (below be referred to as the second meeting
Words), it and will be in the service switching of UE in the first session to the second session, you can be interpreted as, the is switched to from the first session
Two sessions, UE need to discharge the first session, establish the second session.
The first session is established from UE and network below, during switching the first session to the second session (i.e. to user plane
UPF) reselecting method is described in detail.
As shown in figure 5, user plane reselecting method provided in an embodiment of the present invention may include S201-S213：
S201, UE initiate the foundation request of the first session.
In the embodiment of the present invention, initiation session from UE to a certain data network when, UE is by the data network title of the DN
(data network name, DNN) carries the AMF being sent in the foundation request of the first session in network, AMF completions pair
After the authentication of UE, AMF selects a SMF that service can be provided for UE, and then the foundation of the first session is asked forwarding by AMF
Give the SMF.
S202, SMF are determined as the first UPF that UE provides service.
In the embodiment of the present invention, SMF can according to be locally configured or external policy be UE select a UPF.Wherein, originally
Ground configuration can be that agreement provides that SMF can select UPF specified in agreement as being provided for UE in this conversation procedure for UE
The UPF of service；External policy can be user demand, such as user packet characteristic, as user industrial nature (such as electricity
Lixing industry, water conservancy industry etc.).
It is interacted between S203, SMF and the first UPF, establishes the first session.
S204, SMF send the first session establishment to AMF and complete message, which is completed message again and turned by AMF
Issue UE.
S205, UE send uplink or downlink data by the first UPF and data network.
S206, SMF inquire the current business stream informations of UE to the first UPF.
In the embodiment of the present invention, the method that SMF inquires the current business stream informations of UE to the first UPF may include S206a-
S206d：
S206a, SMF send Business Stream information inquiring request to the first UPF.
S206b, the first UPF receive the Business Stream information inquiring request that SMF is sent.
S206c, the first UPF send the current business stream informations of UE to SMF.
S206d, SMF receive the current business stream informations of UE that the first UPF is sent.
The business stream information for the UE that S207, SMF are received according to business stream information current UE with the SMF last times starts UPF
Relocate flow.
In the embodiment of the present invention, the business for the UE that SMF is received by comparing business stream information current UE with the SMF last times
Stream information, in the case of the business stream information difference of the UE once received on business stream information current UE and SMF, SMF is opened
Dynamic UPF relocates flow, i.e. SMF starts to be redefined as the UPF (determining the 2nd UPF) that UE provides service.
In the embodiment of the present invention, when the conversational services continuity pattern of UE is pattern two, the first meeting of release is initiated first
Then the request of words is establishing the second session, following S208a-S208b is executed after S207：
S208a, SMF initiate the first session release request.
In the embodiment of the present invention, SMF sends session release request to AMF first, and then AMF sends session release to UE and asks
It asks, discharges the first session to trigger network.
It is interacted between S208b, SMF and the first UPF, discharges the first session.
When the conversational services continuity pattern of UE is pattern three, the request for establishing the second session is initiated first, then again
The first session is discharged, following S208c-S208d are executed after above-mentioned S207：
S208c, SMF initiate the request of the second session establishment.
The timer of setting the first session of release is interacted between S208d, SMF and the first UPF.
In the embodiment of the present invention, when the conversational services continuity pattern of UE is pattern three, SMF, which initiates the second session establishment, to be asked
It asks, to indicate that UE initiates the second session flow to same data network, and continues to safeguard the first session, and set timer,
At the end of timer timing, then discharge the first session.
S209, UE initiate the foundation request of the second session.
In the embodiment of the present invention, UE initiates the request of the second session establishment to data network identical with the first session, and AMF connects
After receiving session establishment request, for UE selections and identical SMF in above-mentioned S201, then the session establishment is asked to forward
Give the SMF.
Other descriptions for S209, may refer to the specific descriptions for S201 in above-described embodiment, no longer superfluous herein
It states.
S210, SMF are determined as the 2nd UPF that UE provides service according to the business stream information of UE.
For the specific descriptions of S210, may refer in above-described embodiment for the associated description of S103 (including S103a),
Details are not described herein again.
It is interacted between S211, SMF and the 2nd UPF, establishes the second session.
S212, SMF send the second session establishment to AMF and complete message, which is completed message again and turned by AMF
Issue UE.
S213, UE send uplink or downlink data by the 2nd UPF and data network.
So far, the gravity treatment of UPF is completed, and the second session is switched to by the first session.
User plane reselecting method provided in an embodiment of the present invention, SMF can send Business Stream information inquiry to current UPF and ask
It asks, after SMF receives the current business stream information of UE that current UPF is sent, one on business stream information current UE and SMF
In the case of the business stream information difference of the UE of secondary reception, SMF is redefined as UE offers according to business stream information current UE
The UPF of service.Compared with prior art, since SMF can determine whether to be redefined as according to the current business stream informations of UE
UE provides the UPF of service, and in the case where needing to redefine UPF, according to UE, current business stream information redefines
One UPF, in this way, can reducing UE service delays with optimizing user plane path, ensureing UE service bandwidths, to improve user's body
It tests.
In the case where dividing each function module using corresponding each function, Fig. 6 shows involved in above-described embodiment
And SMF a kind of possible structural schematic diagram, as shown in fig. 6, the SMF may include sending module 200, receiving module 201
With determining module 202.
Sending module 200, for that can be used to current UPF transmission Business Stream information inquiring requests, such as sending module 200
S101, S204, S206a, S208a, S208c and S212 in above method embodiment are executed in supporting SMF；Receiving module 201,
The business stream information current for receiving UE that current UPF is sent, such as receiving module 201 can be used for supporting in SMF execution
State the S102 and S206d in embodiment of the method；Determining module 202, in business stream information current UE and receiving module 201
In the case of the business stream information difference for the UE that last time receives, according to the current business stream informations of UE, it is redefined as UE and carries
For the UPF of service, for example, determining module 202 can be used for supporting SMF execute the S103 in above method embodiment (including
S103a), S202, S207 and S210.
Optionally, above-mentioned determining module 202 is specifically used in UPF corresponding with the business stream information that UE is current, again
It is determined as the UPF that UE provides service.
Optionally, when the conversational services continuity pattern of UE is pattern two, above-mentioned determining module 202 is specifically used in net
After network discharges current sessions, according to the current business stream informations of UE, it is redefined as the UPF that UE provides service, the determination mould
The UPF that block 202 redefines establishes next session of current sessions for UE with network.
Optionally, when the conversational services continuity pattern of UE is pattern three, determining module 202, specifically for being released in network
Before putting current sessions, according to the current business stream informations of UE, it is redefined as the UPF that UE provides service, the determining module 202
The UPF redefined establishes next session of current sessions for UE with network.
Using integrated unit, Fig. 7 shows that one kind of SMF involved in above-described embodiment is possible
Structural schematic diagram.As shown in fig. 7, SMF may include：Processing module 300 and communication module 301.Processing module 300 can be used for
Control management is carried out to the action of SMF, such as processing module 300 can be used for that SMF is supported to execute in above method embodiment
S103 (including S103a), S202, S207 and S210, and/or other processes for techniques described herein.Communication module
301 can be used for supporting the communication of SMF and other network entities, such as communication module 301 to can be used for supporting SMF execution above-mentioned
S101, S102, S204, S206a, S206d, S208a, S208c and S212 in embodiment of the method.Optionally, as shown in fig. 7,
The SMF can also include memory module 302, the program code for storing SMF and data.
In the above-described embodiments, can come wholly or partly by software, hardware, firmware or its arbitrary combination real
It is existing.When being realized using software program, can entirely or partly realize in the form of a computer program product.The computer journey
Sequence product includes one or more computer instructions.It is all or part of when loading and execute on computers the computer instruction
Ground is generated according to the flow or function in the embodiment of the present invention.The computer can be all-purpose computer, special purpose computer, calculating
Machine network or other programmable devices.The computer instruction can store in a computer-readable storage medium, or from one
A computer readable storage medium is transmitted to another computer readable storage medium, for example, the computer instruction can be from one
A web-site, computer, server or data center pass through wired (such as coaxial cable, optical fiber, Digital Subscriber Line
(digital subscriber line, DSL)) mode or wireless (such as infrared, wireless, microwave etc.) mode be to another net
Website, computer, server or data center's transmission.The computer readable storage medium, which can be computer, to be accessed
Any usable medium is either including data storage devices such as one or more usable mediums integrated server, data centers.
The usable medium can be magnetic medium (for example, floppy disk, disk, tape), optical medium (for example, digital video disk
(digital video disc, DVD)) or semiconductor medium (such as solid state disk (solid state drives,
SSD)) etc..
Through the above description of the embodiments, it is apparent to those skilled in the art that, for description
It is convenienct and succinct, only the example of the division of the above functional modules, in practical application, can as needed and will be upper
It states function distribution to be completed by different function modules, i.e., the internal structure of device is divided into different function modules, to complete
All or part of function described above.The specific work process of the system, apparatus, and unit of foregoing description, before can referring to
The corresponding process in embodiment of the method is stated, details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the module or
The division of unit, only a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units
Or component can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, institute
Display or the mutual coupling, direct-coupling or communication connection discussed can be by some interfaces, device or unit
INDIRECT COUPLING or communication connection can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the application can be integrated in a processing unit, it can also
It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.Above-mentioned integrated list
The form that hardware had both may be used in member is realized, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can be stored in a computer read/write memory medium.Based on this understanding, the technical solution of the application is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) or processor execute described in each embodiment of the application
The all or part of step of method.And storage medium above-mentioned includes：It is flash memory, mobile hard disk, read-only memory, random
Access the various media that can store program code such as memory, magnetic disc or CD.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of user plane reselecting method, which is characterized in that including：
Conversation management functional SMF sends Business Stream information inquiring request to active user face function UPF；
The SMF receives the current business stream information of user equipment (UE) that the current UPF is sent；
In business the stream information current UE situation different from the business stream information of the UE once received on the SMF
Under, the SMF is redefined as the UPF that the UE provides service according to business the stream information current UE.
2. according to the method described in claim 1, it is characterized in that,
The Business Stream information of the UE includes at least one of following：The purpose internet protocol address of the UE, the purpose
The port of IP address, the UE IP stream application layer protocol, the medium type of the UE and the upstream and downstream bandwidth of the UE.
3. method according to claim 1 or 2, which is characterized in that the SMF believes according to the Business Stream current UE
Breath is redefined as the UPF that the UE provides service, including：
The SMF is redefined as the UE and provides service in UPF corresponding with the business stream information that the UE is current
UPF。
4. according to the method described in claim 1, it is characterized in that, the conversational services continuity pattern of the UE be pattern two,
The SMF is redefined as the UPF that the UE provides service according to business the stream information current UE, including：
After network discharges current sessions, the SMF is redefined as the UE according to business the stream information current UE
The UPF of service is provided, the UPF that the SMF is redefined establishes next meeting of the current sessions for the UE with network
Words.
5. according to the method described in claim 1, it is characterized in that, the conversational services continuity pattern of the UE be pattern three,
The SMF is redefined as the UPF that the UE provides service according to business the stream information current UE, including：
Before network discharges current sessions, the SMF is redefined as the UE according to business the stream information current UE
The UPF of service is provided, the UPF that the SMF is redefined establishes next meeting of the current sessions for the UE with network
Words.
6. a kind of conversation management functional SMF, which is characterized in that including sending module, receiving module and determining module；
The sending module, for sending Business Stream information inquiring request to active user face function UPF；
The receiving module, the business stream information current for receiving user equipment (UE) that the current UPF is sent；
The determining module, the UE for once being received on business the stream information current UE and the receiving module
Business stream information difference in the case of, according to the current business stream informations of the UE, be redefined as the UE and service be provided
UPF.
7. SMF according to claim 6, which is characterized in that
The Business Stream information of the UE includes at least one of following：The purpose internet protocol address of the UE, the purpose
The port of IP address, the UE IP stream application layer protocol, the medium type of the UE and the upstream and downstream bandwidth of the UE.
8. the SMF described according to claim 6 or 7, which is characterized in that
The determining module is specifically used in UPF corresponding with the business stream information that the UE is current, is redefined as described
UE provides the UPF of service.
9. SMF according to claim 6, which is characterized in that the conversational services continuity pattern of the UE is pattern two；
The determining module is specifically used for after network discharges current sessions, according to the current business stream informations of the UE, weight
Newly it is determined as the UPF that the UE provides service, the UPF that the determining module redefines is for described in the UE and network foundation
Next session of current sessions.
10. SMF according to claim 6, which is characterized in that the conversational services continuity pattern of the UE is pattern three；
The determining module is specifically used for before network discharges current sessions, according to the current business stream informations of the UE, weight
Newly it is determined as the UPF that the UE provides service, the UPF that the determining module redefines is for described in the UE and network foundation
Next session of current sessions.
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