CN108882315A - A kind of path switching method and the network equipment - Google Patents
A kind of path switching method and the network equipment Download PDFInfo
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- CN108882315A CN108882315A CN201710317663.XA CN201710317663A CN108882315A CN 108882315 A CN108882315 A CN 108882315A CN 201710317663 A CN201710317663 A CN 201710317663A CN 108882315 A CN108882315 A CN 108882315A
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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
- H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
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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
- H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
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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
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- Computer Networks & Wireless Communication (AREA)
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- Mobile Radio Communication Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The technical issues of the invention discloses a kind of path switching method and the network equipments, and the UE to solve double registrations can not correctly carry out the switching of user plane data transfer path between 5G system and EPS system.Method is：Obtain instruction information and session label information, wherein the instruction information is used to indicate the switching for needing to carry out user plane data transfer path, and the session label information is used to indicate the session for needing to carry out the switching of user plane data transfer path；It based on the session label information, determines PDU session and is connect with the PDN of the PDU session association, wherein the PDN connection is based on identical APN or DNN by UE with the PDU session and establishes；Based on the instruction information, the path of user plane data transfer is switched between the PDU session and PDN connection.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of path switching methods and the network equipment.
Background technique
5G network needs support the interoperability with LTE network, supports the network architecture mould of 5G network and LTE network interoperability
Type is as shown in Figure 1, the Nx interface between MME and 5G system AMF is optional support, and when network support Nx interface, network can
To support the switching between 5G and LTE network, need to transmit the contextual information of UE, including mobility between MME and AMF at this time
The context of context and session connection.When the network of this support Nx interface of UE access, network may match its registration mode
It is set to single registration mode.It when network does not support Nx interface, does not support to switch between 5G network and LTE network, at this time in order to prop up
Interoperability is held, network needs that UE is required to carry out double registrations, i.e., keeps registration in LTE network and 5G network simultaneously.In view of double notes
The support of business continuance under volume mode, it is desirable that the SMF of the control plane in network supports the function of PGW-C simultaneously, passes through in this way
" HO registration ", it is ensured that when UE is moved between LTE and 5G, session connection is anchored on identical use always
On the anchor point of family face.
The UE of double registrations is further divided into single radio ability or dual radio ability.Single
The UE of radio can only keep the session connection of side in synchronization, i.e., or in the lte networks keep connection or in 5G
Connection is kept in network, in this way if when UE is moved between LTE network and 5G network, packet loss will inevitably occurs, it can not
Guarantee seamless business continuance.And the UE of dual radio can keep connecting simultaneously in LTE network and 5G network, therefore
When moving between network, the switching that can be attached by the way of make-before-break is received from target network
While data, still data can be received from source network, thereby may be ensured that the connection of business.
If the session connection for identical APN (DNN) that UE is established in 5G system and EPS system, and be assigned
Identical IP address, then when as UE, ping-pong is mobile between 5G system and EPS, PGW-U+UPF will after receiving downlink data packet
It can not select correct transmission channel.Therefore, the UE that double registrations exist in the prior art can not be correctly in 5G system and EPS system
The technical issues of switching of user plane data transfer path is carried out between system.
Summary of the invention
The embodiment of the present invention provides a kind of path switching method and the network equipment, and the UE to solve double registrations can not be correct
Ground carries out the technical issues of user plane data transfer path switching between 5G system and EPS system.
Specific technical solution provided in an embodiment of the present invention is as follows：
In a first aspect, the embodiment of the invention provides a kind of path switching methods, including：
Obtain instruction information and session label information, wherein the instruction information, which is used to indicate, needs to carry out user face number
According to the switching of transmission path, the session label information is used to indicate the meeting for needing to carry out the switching of user plane data transfer path
Words；
Based on the session label information, determines PDU session and is connect with the PDN of the PDU session association, wherein
The PDN connection is based on identical APN or DNN by UE with the PDU session and establishes；
Based on the instruction information, by the path of user plane data transfer between the PDU session and PDN connection
It switches over.
In possible embodiment, the instruction information and session label information be UE determine need PDU session with
The information sent when the switching in user plane data transfer path is carried out between PDN connection.
It is described to be based on the instruction information in possible embodiment, by the path of user plane data transfer in the PDU
It switches over, specifically includes between session and PDN connection：
Based on the instruction information, the user face tunnel configuration information that the PDU session is connected with the PDN is generated；
The user face tunnel configuration information is configured to user plane gateway anchor point, so that user plane gateway anchor point is by user face
The path of data transmission switches between the PDU session and PDN connection.
In possible embodiment, the path of user plane data transfer is used to indicate from PDU session in the instruction information
When switching to PDN connection, the user face tunnel configuration information includes：
Delete or deactivate the user face tunnel of the PDU session；With
Create or activate the user face tunnel of the PDN connection.
In possible embodiment, the instruction information is specially to delete or deactivate the user face tunnel of the PDU session
The instruction information in road deactivates the instruction information in the user face tunnel of the PDU session；Or the instruction information is specially to create
Build or activate the instruction information in the user face tunnel of the PDN connection.
In possible embodiment, the instruction information is specially the received instruction letter from the UE in 5G system
Breath；Or
The instruction information is specially the instruction information that the UE from EPS system is received；Or
The instruction information is specially that the UE carries out Idle state into the conversion process of connected state in EPS system, from
The instruction information that MME is received.
In possible embodiment, the path of user plane data transfer is used to indicate from PDN connection in the instruction information
When switching to PDU session, the user face tunnel configuration information includes：
Create or activate the user face tunnel of the PDU session；With
Delete or deactivate the user face tunnel of the PDN connection.
In possible embodiment, when the UE is in connected state in 5G system, the instruction information is specially from institute
It states the received creation of UE or activates the instruction information in PDU session subscriber face transmission tunnel；
When the UE carries out conversion of the Idle state to connected state in 5G system, the instruction information is specially to connect from AMF
The instruction information of the activation PDU session of receipts.
In possible embodiment, when the UE carries out conversion of the Idle state to connected state in 5G system, the instruction
Information is specially from the instruction information of the received activation PDU session of AMF, specially：
The instruction information is after the AMF receives the service request information for carrying the session identification that the UE is sent
The instruction information of the activation PDU session of generation.
In possible embodiment, before the acquisition indicates information and session label information, the method also includes：
The PDU session establishment request that the UE is sent is received, according to contracted user's permanent identification SUPI of the UE and institute
The DNN in the request of PDU session establishment is stated, determines that the UE has built up the PDN of APN identical with DNN meaning and connect；
The PDU session is established for the UE, and is distributed for the PDU session and connect identical IP address with the PDN；
Or
Before the acquisition indicates information and session label information, the method also includes：
It receives the PDN connection that the UE is sent and establishes request, connect foundation request with the PDN according to the IMSI of the UE
In APN, determine that the UE has built up the PDU session of DNN identical with APN；
The PDN connection is established for the UE, and distributes IP address identical with the PDU session for the PDN connection.
Second aspect, the embodiment of the invention provides a kind of network equipments, including：
Module is obtained, for obtaining instruction information and session label information, wherein the instruction information is used to indicate needs
The switching in user plane data transfer path is carried out, the session label information, which is used to indicate, to be needed to carry out user plane data transfer road
The session of diameter switching；
Determining module, for be based on the session label information, determine PDU session and with the PDU session association
PDN connection, wherein the PDN connection is based on identical APN or DNN by UE with the PDU session and establishes；
Path switching module, for being based on the instruction information, by the path of user plane data transfer in the PDU session
It is switched between the PDN connection.
In possible embodiment, the instruction information and session label information be UE determine need PDU session with
The information sent when the switching in user plane data transfer path is carried out between PDN connection.
In possible embodiment, the path switching module is specifically used for：
Based on the instruction information, the user face tunnel configuration information that the PDU session is connected with the PDN is generated；
The user face tunnel configuration information is configured to user plane gateway anchor point, so that user plane gateway anchor point is by user face
The path of data transmission switches between the PDU session and PDN connection.
In possible embodiment, the path of user plane data transfer is used to indicate from PDU session in the instruction information
When switching to PDN connection, the user face tunnel configuration information includes：
Delete or deactivate the user face tunnel of the PDU session；With
Create or activate the user face tunnel of the PDN connection.
In possible embodiment, the instruction information is specially to delete or deactivate the user face tunnel of the PDU session
The instruction information in road；Or the instruction information is specially the instruction letter for creating or activating the user face tunnel of the PDN connection
Breath.
In possible embodiment, the instruction information is specially the received instruction letter from the UE in 5G system
Breath；Or
The instruction information is specially the instruction information that the UE from EPS system is received；Or
The instruction information is specially that the UE carries out Idle state into the conversion process of connected state in EPS system, from
The instruction information that MME is received.
In possible embodiment, the path of user plane data transfer is used to indicate from PDN connection in the instruction information
When switching to PDU session, the user face tunnel configuration information includes：
Create or activate the user face tunnel of the PDU session；With
Delete or deactivate the user face tunnel of the PDN connection.
In possible embodiment, when the UE is in connected state in 5G system, the instruction information is specially from institute
It states the received creation of UE or activates the instruction information in PDU session subscriber face transmission tunnel；
When the UE carries out conversion of the Idle state to connected state in 5G system, the instruction information is specially to connect from AMF
The instruction information of the activation PDU session of receipts.
In possible embodiment, when the UE carries out conversion of the Idle state to connected state in 5G system, the instruction
Information is specially from the instruction information of the received activation PDU session of AMF, specially：
The instruction information is after the AMF receives the service request information for carrying the session identification that the UE is sent
The instruction information of the activation PDU session of generation.
In possible embodiment, the equipment further includes：
Session establishment unit is sent for before the acquisition indicates information and session label information, receiving the UE
PDU session establishment request, according to contracted user's permanent identification SUPI of the UE and the PDU session establishment request in
DNN determines that the UE has built up the PDN of APN identical with DNN meaning and connect；The PDU session is established for the UE,
And it is distributed for the PDU session and connect identical IP address with the PDN；
Connection establishment unit is sent for before the acquisition indicates information and session label information, receiving the UE
PDN connection establish request, connect according to the IMSI of the UE with the PDN and establishes the APN in requesting, determined the UE
Establish the PDU session of DNN identical with APN；The PDN connection is established for the UE, and is PDN connection distribution and institute
State the identical IP address of PDU session.
The third aspect, the embodiment of the invention provides a kind of network equipment, including processor, memory and transceiver,
In, transceiver sends and receivees data under the control of a processor, and preset program is preserved in memory, and processor reading is deposited
Program in reservoir executes following procedure according to the program：
Processor obtains instruction information and session label information, wherein the instruction information, which is used to indicate, to be used
The switching of family face data transmission path, the session label information, which is used to indicate, to be needed to carry out the switching of user plane data transfer path
Session；
Processor is based on the session label information, determines PDU session and connect with the PDN of the PDU session association,
Wherein, the PDN connection is based on identical APN or DNN foundation by UE with the PDU session；
Processor is based on the instruction information, and the path of user plane data transfer is connected in the PDU session and the PDN
It is switched between connecing.
In possible embodiment, the instruction information and session label information be UE determine need PDU session with
The information sent when the switching in user plane data transfer path is carried out between PDN connection.
In possible embodiment, processor is based on the instruction information, generates the PDU session and connects with the PDN
User face tunnel configuration information；
Processor configures the user face tunnel configuration information to user plane gateway anchor point, so that user plane gateway anchor point will
The path of user plane data transfer switches between the PDU session and PDN connection.
In possible embodiment, the path of user plane data transfer is used to indicate from PDU session in the instruction information
When switching to PDN connection, the user face tunnel configuration information includes：
Delete or deactivate the user face tunnel of the PDU session；With
Create or activate the user face tunnel of the PDN connection.
In possible embodiment, the instruction information is specially to delete or deactivate the user face tunnel of the PDU session
The instruction information in road；Or the instruction information is specially the instruction letter for creating or activating the user face tunnel of the PDN connection
Breath.
In possible embodiment, the instruction information is specially the received instruction letter from the UE in 5G system
Breath；Or
The instruction information is specially the instruction information that the UE from EPS system is received；Or
The instruction information is specially that the UE carries out Idle state into the conversion process of connected state in EPS system, from
The instruction information that MME is received.
In possible embodiment, the path of user plane data transfer is used to indicate from PDN connection in the instruction information
When switching to PDU session, the user face tunnel configuration information includes：
Create or activate the user face tunnel of the PDU session；With
Delete or deactivate the user face tunnel of the PDN connection.
In possible embodiment, when the UE is in connected state in 5G system, the instruction information is specially from institute
It states the received creation of UE or activates the instruction information in PDU session subscriber face transmission tunnel；
When the UE carries out conversion of the Idle state to connected state in 5G system, the instruction information is specially to connect from AMF
The instruction information of the activation PDU session of receipts.
In possible embodiment, when the UE carries out conversion of the Idle state to connected state in 5G system, the instruction
Information is specially from the instruction information of the received activation PDU session of AMF, specially：
The instruction information is after the AMF receives the service request information for carrying the session identification that the UE is sent
The instruction information of the activation PDU session of generation.
In possible embodiment, before the acquisition indicates information and session label information, described in processor reception
The PDU session establishment request that UE is sent, is requested according to contracted user's permanent identification SUPI of the UE and the PDU session establishment
In DNN, determine that the UE has built up the PDN of APN identical with DNN meaning and connect；The PDU meeting is established for the UE
Words, and distributed for the PDU session and connect identical IP address with the PDN；Or
Before the acquisition indicates information and session label information, processor receives the PDN connection that the UE is sent and builds
Vertical request, connects the APN established in request with the PDN according to the IMSI of the UE, determines that the UE has built up and APN
The PDU session of identical DNN；The PDN connection is established for the UE, and is PDN connection distribution and the PDU session phase
Same IP address.
Based on the above-mentioned technical proposal, a kind of UE of double registrations is provided in the embodiment of the present invention in 5G system and EPS system
Between carry out the mode of data surface transmission path switching, instruction information based on UE and need to carry out user plane data transfer path and cut
The session label information changed connects in the path of user plane data transfer in the PDU session in 5G system and the PDN in EPS system
It is switched between connecing.The UE that double registrations in the prior art can effectively be solved can not be correctly between 5G system and EPS system
The technical issues of carrying out the switching of user plane data transfer path.Be embodied as UE and distribute reasonable toggle path, enable UE just
The switching in user plane data transfer path really is carried out between 5G system and EPS system.
Detailed description of the invention
Fig. 1 is the network architecture model for supporting 5G network and LTE network interoperability；
Fig. 2 is the flow diagram of path switching method in the embodiment of the present invention；
Fig. 3 is the process schematic that UE carries out path switching between 5G system and EPS system in the embodiment of the present invention；
Fig. 4 is that the transmission path of UE in the embodiment of the present invention is switched to the process schematic of EPS system by 5G system；
Transmission path switches to 5G by EPS system when Fig. 5 is in connected state for UE in the embodiment of the present invention in 5G system
The process schematic of system；
Fig. 6 be in the embodiment of the present invention UE carried out in 5G system when conversion of the Idle state to connected state transmission path by
EPS system switches to the process schematic of 5G system；
Fig. 7 is the structural schematic diagram of the network equipment in the embodiment of the present invention；
Fig. 8 is the structural schematic diagram of another network equipment in the embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
In the embodiment of the present invention, as shown in Fig. 2, path handoff procedure is as follows：
Step 101：Obtain instruction information and session label information, wherein the instruction information, which is used to indicate, to be needed to carry out
The switching in user plane data transfer path, the session label information, which is used to indicate, to be needed to carry out user plane data transfer path and cuts
The session changed；
Wherein, the instruction information and session label information are that UE needs to carry out between PDU session and PDN connection determining
The information sent when the switching in user plane data transfer path；
Step 102：Based on the session label information, determines PDU session and connect with the PDN of the PDU session association
It connects, wherein the PDN connection is based on identical APN or DNN by UE with the PDU session and establishes；
Step 103：Based on the instruction information, by the path of user plane data transfer in the PDU session and the PDN
It is switched between connection；Specially：Based on the instruction information, the user face that the PDU session is connected with the PDN is generated
Tunnel configuration information；The user face tunnel configuration information is configured to user plane gateway anchor point, so that user plane gateway anchor point will
The path of user plane data transfer switches between the PDU session and PDN connection.
Also, before the acquisition indicates information and session label information, the method also includes：
The PDU session establishment request that the UE is sent is received, according to contracted user's permanent identification SUPI of the UE and institute
The DNN in the request of PDU session establishment is stated, determines that the UE has built up the PDN of APN identical with DNN meaning and connect；For institute
It states UE and establishes the PDU session, and distributed for the PDU session and connect identical IP address with the PDN；Or
Before the acquisition indicates information and session label information, the method also includes：
It receives the PDN connection that the UE is sent and establishes request, connect foundation request with the PDN according to the IMSI of the UE
In APN, determine that the UE has built up the PDU session of DNN identical with APN；The PDN connection is established for the UE,
And IP address identical with the PDU session is distributed for the PDN connection.
Specifically, in the present embodiment, when UE is in connected state, when the network that judgement currently connects can not continue to provide clothes
After business, UE determines the switching for needing that user plane data transfer path is carried out between PDU session and PDN connection.UE sends instruction letter
Breath and the corresponding session label information in 5G system, instruction information are used to indicate PGW-C+SMF and need to carry out user face number
According to the switching of transmission path, session label information is used to indicate the session for needing to carry out the switching of user plane data transfer path.
As shown in schematic diagram 3, UE creates certain session or connection in EPS system or 5G system, due to the movement of UE,
UE has found that the signal quality of current system is bad, needs to be implemented and moves between system, UE then initiated in new system registration or
Attaching process, and session or connection foundation request are initiated, corresponding instruction information and session label information are sent, indicates information
It is used to indicate the switching that the UE needs to carry out user plane data transfer path between PDU session and PDN connection.Session or connection are built
HO flag is carried in vertical request, according to HO flag, to judge to need after request is established in PGW-C+SMF reception session or connection
The connection or session of identical APN or DNN are created in new system for UE, therefore PGW-C+SMF is according to session label information
Determine corresponding PDU session, and the IMSI based on UE and APN (or DNN) checks PDU session context, system before acquisition
The IP address of UE is distributed in middle PDU session or PDN connection, then distributes identical IP address in new system for UE, and be newly
New PDU session or PDN connection context are created in system for UE.PGW-C+SMF carries out PDN with APN according to IMSI and connects up and down
The association of text and PDU session context, then PGW-C+SMF generates the user face that PDU session is connected with PDN according to user's instruction
Tunnel configuration information, PGW-C+SMF configure the user face tunnel configuration information to user plane gateway anchor point PGW-U+UPF, so that
User plane gateway anchor point switches in the path of user plane data transfer between PDU session and PDN connection.
Specifically, UE creates the PDU session of DNN if UE is when connecting 5G system, due to the movement of UE, determination is worked as
The signal quality of the 5G system of preceding connection is bad, determines that the 5G system currently connected can not continue offer service.So UE to
EPS system initiates registration or attaching process, initiates PDN connection and establishes request, and sends instruction information and session identification letter
Breath, instruction information are used to indicate the UE and need to switch to EPS system PDN connection by 5G system PDU session.The PDN connection is established
HO flag is carried in request, according to HO flag, to judge to need to exist for UE after PGW-C+SMF receives PDN connection foundation request
The PDN that APN identical with DNN is created in EPS system is connect.In turn, PGW-C+SMF establishes PDN connection for UE, and is PDN
Connection distributes IP address identical with PDU session.Then, PGW-C+SMF creates PDN connection context in EPS system for UE.
PGW-C+SMF determines corresponding PDU session according to session label information, and then carries out PDN with APN according to IMSI and connect up and down
The association of text and PDU session context, then generates user face configuration-direct, and PGW-C+SMF is to user plane gateway anchor point PGW-U
+ UPF configures the user face tunnel configuration information, so that user plane gateway anchor point is by the path of user plane data transfer by 5G system
PDU session switches to EPS system PDN connection.
Specifically, UE creates the PDN connection of APN if UE is when connecting EPS system, due to the movement of UE, determination is worked as
The signal quality of the EPS system of preceding connection is bad, determines that the EPS system currently connected can not continue offer service.So UE to
5G system initiates registration or attaching process, and initiates the request of PDU session establishment, and sends instruction information and session identification letter
Breath, instruction information are used to indicate the UE and need to switch to 5G system PDU session by EPS system PDN connection.The PDU session establishment
HO flag is carried in request, according to HO flag, to judge to need to exist for UE after PGW-C+SMF receives the request of PDU session establishment
The PDU session of DNN identical with APN is created in 5G system.In turn, PGW-C+SMF is UE foundation according to session label information
The PDU session of session label information instruction, and identical IP address is connect with PDN for PDU session distribution.Then, PGW-C+
SMF creates PDU session context in 5G system for UE.PGW-C+SMF according to IMSI and APN carry out PDN connect context with
The association of PDU session context, then generates user face configuration-direct, and PGW-C+SMF is to user plane gateway anchor point PGW-U+UPF
The user face tunnel configuration information is configured, so that user plane gateway anchor point is by the path of user plane data transfer by EPS system PDN
Connection switches to 5G system PDU session.
In the present embodiment, due to the mobility of UE, UE is caused to need to carry out user face number between 5G system and EPS system
According to the switching in the path of transmission.When carrying out path switching, it is broadly divided into following two situation：
The first：UE switches to EPS system from 5G system, at this point, the instruction information is used to indicate user face data biography
Defeated path switches to PDN connection from PDU session, and the user face tunnel configuration information includes：
Delete or deactivate the user face tunnel of the PDU session；With
Create or activate the user face tunnel of the PDN connection.
Wherein, the instruction information is specially to delete or deactivate the instruction information in the user face tunnel of the PDU session；
Or the instruction information is specially to create or activate the instruction information in the user face tunnel of the PDN connection.The instruction letter
Breath is specially the received instruction information from the UE in 5G system；Or the instruction information is specially from EPS system
The instruction information that receives of the UE；Or the instruction information is specially that the UE carries out Idle state in EPS system and arrives
In the conversion process of connected state, the instruction information that is received from MME.
Specifically, in the present embodiment, UE switches to the process of EPS system as shown in schematic diagram 4 from 5G system, and UE is used
Identical APN establishes PDN connection in EPS system, is establishing PDU session with 5G system, UE is in PDN connection and PDU session
In identical IP address is assigned.Due to the movement of UE, UE judges to need user according to the signal quality of current 5G network
The data transfer path in face is switched to EPS from 5G.If current UE is in Idle state in the side EPS, UE needs to enter in the side EPS
Connected state, UE can initiate TAU process in EPS system and enter connected state, or service request mistake is initiated in EPS system
Journey restores all PDN connections.UE issues session management request message, such as PDU session modification request in 5G system, request
Middle carrying is desired with the session label information and the corresponding instruction information of UE of the PDU session of data transfer path switching, refers to
Show that information is used to indicate the path of user plane data transfer and switches to PDN connection from PDU session, instruction information includes deactivating to use
The instruction information in family face, and delete or deactivate the instruction information in the user face tunnel of the PDU session.In addition, UE can also
Indicate that PGW-C+SMF carries out the switching of user face transmission path to send specific message.PGW-C+SMF receives instruction information
Afterwards, PGW-C+SMF according to the session label information of PDU session find corresponding PDU session context and with PDU session
The context of associated PDN connection, then generates user face configuration-direct, and instruction PGW-U+UPF deletes or deactivate PDU session
User face tunnel configuration, creation or activation PDN connection user face tunnel configuration.If UE do not support in EPS system and
5G system while sending and receiving data, then UE needs before accessing EPS system, i.e., TAU or service request are initiated in EPS system
Before process, the instruction that the path of user plane data transfer is switched to PDN connection from PDU session is first sent in 5G system.
Certainly, instruction information may be the instruction information for the modification PDN connection that the UE from EPS system is received；Or exist for UE
Idle state is carried out in EPS system into the conversion process of connected state, the finger of the modification carrying or transmission tunnel that receive from MME
Show information.
Second：UE switches to 5G system from EPS system, at this point, the instruction information is used to indicate user face data biography
Defeated path switches to PDU session from PDN connection, and the user face tunnel configuration information includes：
Create or activate the user face tunnel of the PDU session；With
Delete or deactivate the user face tunnel of the PDN connection.
When UE switches to 5G system from EPS system, it is divided into following two situation：
Situation one：When the UE is in connected state in 5G system, the instruction information is specially received from the UE
Create or activate the instruction information in PDU session subscriber face transmission tunnel；
Situation two：When the UE carries out conversion of the Idle state to connected state in 5G system, the instruction information is specially
From the instruction information of the received activation PDU session of AMF, specially：
The instruction information is after the AMF receives the service request information for carrying the session identification that the UE is sent
The instruction information of the activation PDU session of generation.
Specifically, in the present embodiment, in above situation one, as shown in schematic diagram 5, UE is using identical APN in EPS system
System establishes PDN connection, is establishing PDU session with 5G system, UE is assigned identical in PDN connection and PDU session
IP address.Due to the movement of UE, UE judges to need to transmit the data in user face according to the signal quality of current EPS network
Path is switched to 5G system from EPS.UE is in connected state in 5G system, and UE issues session management request in 5G system and disappears
Breath, such as PDU session revision are requested, and the session identification for being desired with the PDU session of data transfer path switching is carried in request
Information and the corresponding instruction information of UE, the path that instruction information is used to indicate user plane data transfer are switched to from PDN connection
PDU session, instruction information include deactivating the instruction information in user face, and create or activate PDU session subscriber face to pass
The instruction information in defeated tunnel.In addition, UE can also send specific message to indicate that PGW-C+SMF carries out user face transmission path
Switching.After PGW-C+SMF receives instruction information, PGW-C+SMF finds according to the session label information of PDU session and is corresponding to it
PDU session context and the context that is connect with the PDN of PDU session association, then generate user face configuration-direct, instruction
PGW-U+UPF deletes or deactivates the user face tunnel configuration of PDN connection, creates or the user face tunnel of activation PDU session is matched
It sets.
Specifically, in the present embodiment, in above situation two, as shown in schematic diagram 6, UE is using identical APN in EPS system
System establishes PDN connection, is establishing PDU session with 5G system, UE is assigned identical in PDN connection and PDU session
IP address.Due to the movement of UE, UE judges to need to transmit the data in user face according to the signal quality of current EPS network
Path is switched to 5G system from EPS.UE carries out the conversion of Idle state to connected state in 5G system, and UE is issued in EPS system
Service request information, carries the session label information of PDU session, and instruction restores PDU session indicated by session label information.
After AMF receives service request information, N11 message is sent to SMF, request activates the user face of the PDU session, PGW-C+SMF root
According to N11 message, the PDU session context and associated PDN connection context of instruction are found using session label information, then
User face configuration-direct is generated, instruction PGW-U+UPF deletes or deactivate the user face tunnel configuration of PDN connection, creates or swashs
The user face tunnel configuration of PDU session living.
Based on the same inventive concept, a kind of network equipment, the specific reality of the network equipment are provided in the embodiment of the present invention
The description that can be found in embodiment of the method part is applied, overlaps will not be repeated, as shown in fig. 7, the network equipment mainly includes：
Module 701 is obtained, for obtaining instruction information and session label information, wherein the instruction information is used to indicate
Need to carry out the switching in user plane data transfer path, the session label information, which is used to indicate, to be needed to carry out user face data biography
The session of defeated path switching；
Determining module 702, for be based on the session label information, determine PDU session and with the PDU session association
PDN connection, wherein the PDN connection and the PDU session are based on identical APN or DNN by UE and establish；
Path switching module 703, for being based on the instruction information, by the path of user plane data transfer in the PDU
It is switched between session and PDN connection.
In possible embodiment, the instruction information and session label information be UE determine need PDU session with
The information sent when the switching in user plane data transfer path is carried out between PDN connection.
In possible embodiment, the path switching module 703 is specifically used for：
Based on the instruction information, the user face tunnel configuration information that the PDU session is connected with the PDN is generated；
The user face tunnel configuration information is configured to user plane gateway anchor point, so that user plane gateway anchor point is by user face
The path of data transmission switches between the PDU session and PDN connection.
In possible embodiment, the path of user plane data transfer is used to indicate from PDU session in the instruction information
When switching to PDN connection, the user face tunnel configuration information includes：
Delete or deactivate the user face tunnel of the PDU session；With
Create or activate the user face tunnel of the PDN connection.
In possible embodiment, the instruction information is specially to delete or deactivate the user face tunnel of the PDU session
The instruction information in road；Or the instruction information is specially the instruction letter for creating or activating the user face tunnel of the PDN connection
Breath.
In possible embodiment, the instruction information is specially the received instruction letter from the UE in 5G system
Breath；Or
The instruction information is specially the instruction information that the UE from EPS system is received；Or
The instruction information is specially that the UE carries out Idle state into the conversion process of connected state in EPS system, from
The instruction information that MME is received.
In possible embodiment, the path of user plane data transfer is used to indicate from PDN connection in the instruction information
When switching to PDU session, the user face tunnel configuration information includes：
Create or activate the user face tunnel of the PDU session；With
Delete or deactivate the user face tunnel of the PDN connection.
In possible embodiment, when the UE is in connected state in 5G system, the instruction information is specially from institute
It states the received creation of UE or activates the instruction information in PDU session subscriber face transmission tunnel；
When the UE carries out conversion of the Idle state to connected state in 5G system, the instruction information is specially to connect from AMF
The instruction information of the activation PDU session of receipts.
In possible embodiment, when the UE carries out conversion of the Idle state to connected state in 5G system, the instruction
Information is specially from the instruction information of the received activation PDU session of AMF, specially：
The instruction information is after the AMF receives the service request information for carrying the session identification that the UE is sent
The instruction information of the activation PDU session of generation.
In possible embodiment, the equipment further includes：
Session establishment unit is sent for before the acquisition indicates information and session label information, receiving the UE
PDU session establishment request, according to contracted user's permanent identification SUPI of the UE and the PDU session establishment request in
DNN determines that the UE has built up the PDN of APN identical with DNN meaning and connect；The PDU session is established for the UE,
And it is distributed for the PDU session and connect identical IP address with the PDN；
Connection establishment unit is sent for before the acquisition indicates information and session label information, receiving the UE
PDN connection establish request, connect according to the IMSI of the UE with the PDN and establishes the APN in requesting, determined the UE
Establish the PDU session of DNN identical with APN；The PDN connection is established for the UE, and is PDN connection distribution and institute
State the identical IP address of PDU session.
Based on the same inventive concept, the embodiment of the invention provides a kind of network equipment, the specific implementations of the network equipment
It can be found in the description of embodiment of the method part, overlaps will not be repeated, as shown in figure 8, the network equipment mainly includes processing
Device 801, memory 802 and transceiver 803, wherein transceiver 803 sends and receivees data under the control of processor 801, deposits
Preset program is preserved in reservoir 802, processor 801 reads the program in memory 802, executes following mistake according to the program
Journey：
Processor 801 obtains instruction information and session label information, wherein the instruction information, which is used to indicate, to be needed to carry out
The switching in user plane data transfer path, the session label information, which is used to indicate, to be needed to carry out user plane data transfer path and cuts
The session changed；
Processor 801 is based on the session label information, determines PDU session and connects with the PDN of the PDU session association
It connects, wherein the PDN connection is based on identical APN or DNN by UE with the PDU session and establishes；
Processor 801 is based on the instruction information, by the path of user plane data transfer in the PDU session and described
It is switched between PDN connection.
Wherein, in fig. 8, bus architecture may include the bus and bridge of any number of interconnection, specifically by processor 801
The various circuits for the memory that the one or more processors and memory 802 of representative represent link together.Bus architecture is also
Various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like can be linked together, these are all
It is it is known in the art, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 803 can
To be multiple element, that is, includes transmitter and transceiver, the list for communicating over a transmission medium with various other equipment is provided
Member.Processor 801, which is responsible for management bus architecture and common processing, memory 802, can store processor 801 and is executing operation
When used data.
In possible embodiment, the instruction information and session label information be UE determine need PDU session with
The information sent when the switching in user plane data transfer path is carried out between PDN connection.
In possible embodiment, processor is based on the instruction information, generates the PDU session and connects with the PDN
User face tunnel configuration information；
Processor 801 configures the user face tunnel configuration information to user plane gateway anchor point, so that user plane gateway anchor
Point switches in the path of user plane data transfer between the PDU session and PDN connection.
In possible embodiment, the path of user plane data transfer is used to indicate from PDU session in the instruction information
When switching to PDN connection, the user face tunnel configuration information includes：
Delete or deactivate the user face tunnel of the PDU session；With
Create or activate the user face tunnel of the PDN connection.
In possible embodiment, the instruction information is specially to delete or deactivate the user face tunnel of the PDU session
The instruction information in road；Or the instruction information is specially the instruction letter for creating or activating the user face tunnel of the PDN connection
Breath.
In possible embodiment, the instruction information is specially the received instruction letter from the UE in 5G system
Breath；Or
The instruction information is specially the instruction information that the UE from EPS system is received；Or
The instruction information is specially that the UE carries out Idle state into the conversion process of connected state in EPS system, from
The instruction information that MME is received.
In possible embodiment, the path of user plane data transfer is used to indicate from PDN connection in the instruction information
When switching to PDU session, the user face tunnel configuration information includes：
Create or activate the user face tunnel of the PDU session；With
Delete or deactivate the user face tunnel of the PDN connection.
In possible embodiment, when the UE is in connected state in 5G system, the instruction information is specially from institute
It states the received creation of UE or activates the instruction information in PDU session subscriber face transmission tunnel；
When the UE carries out conversion of the Idle state to connected state in 5G system, the instruction information is specially to connect from AMF
The instruction information of the activation PDU session of receipts.
In possible embodiment, when the UE carries out conversion of the Idle state to connected state in 5G system, the instruction
Information is specially from the instruction information of the received activation PDU session of AMF, specially：
The instruction information is after the AMF receives the service request information for carrying the session identification that the UE is sent
The instruction information of the activation PDU session of generation.
In possible embodiment, before the acquisition indicates information and session label information, described in processor reception
The PDU session establishment request that UE is sent, is requested according to contracted user's permanent identification SUPI of the UE and the PDU session establishment
In DNN, determine that the UE has built up the PDN of APN identical with DNN meaning and connect；The PDU meeting is established for the UE
Words, and distributed for the PDU session and connect identical IP address with the PDN；Or
Before the acquisition indicates information and session label information, processor receives the PDN connection that the UE is sent and builds
Vertical request, connects the APN established in request with the PDN according to the IMSI of the UE, determines that the UE has built up and APN
The PDU session of identical DNN；The PDN connection is established for the UE, and is PDN connection distribution and the PDU session phase
Same IP address.
Based on the above-mentioned technical proposal, a kind of UE of double registrations is provided in the embodiment of the present invention in 5G system and EPS system
Between carry out data surface transmission path switching mode, instruction information based on UE and need to carry out user plane data transfer path
The session identification of switching switches in the path of user plane data transfer between the PDU session and PDN connection.
The UE that double registrations in the prior art can effectively be solved can not correctly carry out user face data biography between 5G system and EPS system
The technical issues of switching in defeated path.Be embodied as UE and distribute reasonable toggle path, enable UE correctly in 5G system and
The switching in user plane data transfer path is carried out between EPS system.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The shape for the computer program product implemented in usable storage medium (including but not limited to magnetic disk storage and optical memory etc.)
Formula.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The equipment for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of equipment, the commander equipment realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (21)
1. a kind of path switching method, which is characterized in that including：
Obtain instruction information and session label information, wherein the instruction information, which is used to indicate, to be needed to carry out user face data biography
The switching in defeated path, the session label information are used to indicate the session for needing to carry out the switching of user plane data transfer path；
Based on the session label information, determines PDU session and connect with the PDN of the PDU session association, wherein is described
PDN connection is based on identical APN or DNN by UE with the PDU session and establishes；
Based on the instruction information, the path of user plane data transfer is carried out between the PDU session and PDN connection
Switching.
2. the method as described in claim 1, which is characterized in that the instruction information and session label information need for UE determining
The information sent when the switching in user plane data transfer path is carried out between PDU session and PDN connection.
3. method according to claim 2, which is characterized in that it is described to be based on the instruction information, by user plane data transfer
Path switched between the PDU session and PDN connection, specifically include：
Based on the instruction information, the user face tunnel configuration information that the PDU session is connected with the PDN is generated；
The user face tunnel configuration information is configured to user plane gateway anchor point, so that user plane gateway anchor point is by user face data
The path of transmission switches between the PDU session and PDN connection.
4. method as claimed in claim 3, which is characterized in that be used to indicate user plane data transfer in the instruction information
When path switches to PDN connection from PDU session, the user face tunnel configuration information includes：
Delete or deactivate the user face tunnel of the PDU session；With
Create or activate the user face tunnel of the PDN connection.
5. method as claimed in claim 4, which is characterized in that the instruction information is specially to delete or deactivate the PDU
The instruction information in the user face tunnel of session；Or the instruction information is specially to create or activate the user of the PDN connection
The instruction information in face tunnel.
6. method as claimed in claim 5, which is characterized in that the instruction information is specially from the UE in 5G system
Received instruction information；Or
The instruction information is specially the instruction information that the UE from EPS system is received；Or
The instruction information is specially that the UE carries out Idle state into the conversion process of connected state in EPS system, is connect from MME
The instruction information received.
7. method as claimed in claim 3, which is characterized in that be used to indicate user plane data transfer in the instruction information
When path switches to PDU session from PDN connection, the user face tunnel configuration information includes：
Create or activate the user face tunnel of the PDU session；With
Delete or deactivate the user face tunnel of the PDN connection.
8. the method for claim 7, which is characterized in that
When the UE is in connected state in 5G system, the instruction information is specially from the received creation of the UE or activation institute
State the instruction information in PDU session subscriber face transmission tunnel；
When the UE carries out conversion of the Idle state to connected state in 5G system, the instruction information is specially received from AMF
Activate the instruction information of the PDU session.
9. method according to claim 8, which is characterized in that the UE carries out Idle state in 5G system and turns to connected state
When changing, the instruction information is specially the instruction information from the received activation PDU session of AMF：
The instruction information is to generate after the AMF receives the service request information for carrying the session identification that the UE is sent
The activation PDU session instruction information.
10. the method as described in any claim in claim 2-9, which is characterized in that the acquisition instruction information and
Before session label information, the method also includes：
The PDU session establishment request that the UE is sent is received, according to the contracted user's permanent identification SUPI and the PDU of the UE
DNN in session establishment request determines that the UE has built up the PDN of APN identical with DNN meaning and connect；
The PDU session is established for the UE, and is distributed for the PDU session and connect identical IP address with the PDN；Or
Before the acquisition indicates information and session label information, the method also includes：
It receives the PDN connection that the UE is sent and establishes request, connected in foundation request according to the IMSI of the UE with the PDN
APN determines that the UE has built up the PDU session of DNN identical with APN；
The PDN connection is established for the UE, and distributes IP address identical with the PDU session for the PDN connection.
11. a kind of network equipment, which is characterized in that including：
Module is obtained, for obtaining instruction information and session label information, wherein the instruction information, which is used to indicate, to be needed to carry out
The switching in user plane data transfer path, the session label information, which is used to indicate, to be needed to carry out user plane data transfer path and cuts
The session changed；
Determining module, for being based on the session label information, determining PDU session and connecting with the PDN of the PDU session association
It connects, wherein the PDN connection is based on identical APN or DNN by UE with the PDU session and establishes；
Path switching module, for being based on the instruction information, by the path of user plane data transfer in the PDU session and institute
It states and is switched between PDN connection.
12. equipment as claimed in claim 11, which is characterized in that the instruction information and session label information are UE in determination
Need the information sent when the switching for carrying out user plane data transfer path between PDU session and PDN connection.
13. equipment as claimed in claim 12, which is characterized in that the path switching module is specifically used for：
Based on the instruction information, the user face tunnel configuration information that the PDU session is connected with the PDN is generated；
The user face tunnel configuration information is configured to user plane gateway anchor point, so that user plane gateway anchor point is by user face data
The path of transmission switches between the PDU session and PDN connection.
14. equipment as claimed in claim 13, which is characterized in that be used to indicate user plane data transfer in the instruction information
Path when switching to PDN connection from PDU session, the user face tunnel configuration information includes：
Delete or deactivate the user face tunnel of the PDU session；With
Create or activate the user face tunnel of the PDN connection.
15. equipment as claimed in claim 14, which is characterized in that the instruction information is specially described in deletion or deactivation
The instruction information in the user face tunnel of PDU session；Or the instruction information is specially to create or activate the use of the PDN connection
The instruction information in family face tunnel.
16. equipment as claimed in claim 15, which is characterized in that the instruction information is specially the UE from 5G system
Locate received instruction information；Or
The instruction information is specially the instruction information that the UE from EPS system is received；Or
The instruction information is specially that the UE carries out Idle state into the conversion process of connected state in EPS system, is connect from MME
The instruction information received.
17. equipment as claimed in claim 13, which is characterized in that be used to indicate user plane data transfer in the instruction information
Path when switching to PDU session from PDN connection, the user face tunnel configuration information includes：
Create or activate the user face tunnel of the PDU session；With
Delete or deactivate the user face tunnel of the PDN connection.
18. equipment as claimed in claim 17, which is characterized in that
When the UE is in connected state in 5G system, the instruction information is specially from the received creation of the UE or activation institute
State the instruction information in PDU session subscriber face transmission tunnel；
When the UE carries out conversion of the Idle state to connected state in 5G system, the instruction information is specially received from AMF
Activate the instruction information of the PDU session.
19. equipment as claimed in claim 18, which is characterized in that the UE carries out Idle state to connected state in 5G system
When conversion, the instruction information is specially from the instruction information of the received activation PDU session of AMF, specially：
The instruction information is to generate after the AMF receives the service request information for carrying the session identification that the UE is sent
The activation PDU session instruction information.
20. the equipment as described in any claim in claim 12-19, which is characterized in that the equipment further includes：
Session establishment unit, for before the acquisition indicates information and session label information, receiving the PDU that the UE is sent
Session establishment request, according to the DNN in contracted user's permanent identification SUPI of the UE and PDU session establishment request, really
The PDN that the fixed UE has built up APN identical with DNN meaning is connect；The PDU session is established for the UE, and is institute
It states PDU session distribution and connect identical IP address with the PDN；
Connection establishment unit, for before the acquisition indicates information and session label information, receiving the PDN that the UE is sent
Request is established in connection, is connected the APN established in request with the PDN according to the IMSI of the UE, is determined that the UE has built up
To the PDU session of DNN identical with APN；Establish the PDN connection for the UE, and for the PDN connection distribute with it is described
The identical IP address of PDU session.
21. a kind of network equipment, including processor, memory and transceiver, wherein transceiver receives under the control of a processor
With send data, preserve preset program in memory, which is characterized in that when the processor reads the program in memory
It realizes such as the step of any one of claim 1-10 claim the method.
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| CN108882315B (en) | 2020-11-10 |
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