CN108377582A - Delete method, network element and the system in user plane tunnel - Google Patents

Delete method, network element and the system in user plane tunnel Download PDF

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Publication number
CN108377582A
CN108377582A CN201610963406.9A CN201610963406A CN108377582A CN 108377582 A CN108377582 A CN 108377582A CN 201610963406 A CN201610963406 A CN 201610963406A CN 108377582 A CN108377582 A CN 108377582A
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China
Prior art keywords
network element
user plane
plane network
target
tunnel
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CN201610963406.9A
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CN108377582B (en
Inventor
聂胜贤
周润泽
陈中平
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN202110221115.3A priority Critical patent/CN113056038B/en
Priority to CN201610963406.9A priority patent/CN108377582B/en
Priority to PCT/CN2017/108260 priority patent/WO2018082517A1/en
Publication of CN108377582A publication Critical patent/CN108377582A/en
Application granted granted Critical
Publication of CN108377582B publication Critical patent/CN108377582B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/32—Release of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/34—Selective release of ongoing connections

Abstract

An embodiment of the present invention provides a kind of method, network element and the systems in deletion user plane tunnel, are related to field of communication technology.The method is applied in communication system, and communication system includes control plane network element and user plane network element, has at least one user plane tunnel between control plane network element and user plane network element, the method includes：Control plane network element determines the target user face tunnel for existing at least one user plane tunnel and meeting preset condition；Control plane network element sends solicited message to user plane network element, which is used to indicate user plane network element delete target user plane tunnel；User plane network element is according to request message, delete target user plane tunnel.In the scheme of the embodiment of the present invention, for the scene that control plane and user plane detach, the technical solution for deleting the user plane tunnel between control plane network element and user plane network element is provided so that user plane tunnel can be deleted when that need not use, to save resource.

Description

Delete method, network element and the system in user plane tunnel
Technical field
The present invention relates to fields of communication technology, more particularly to delete method, network element and the system in user plane tunnel.
Background technology
Control plane and user plane separation (Control and User Plane Separation, CUPS) are core net nets One development trend of network framework.Control plane (Control Plane, CP) and user plane are executed by different functional entitys respectively The function of (User Plane, UP) can make control plane and user plane use different software or hardware resource respectively, according to Demand is deployed to different positions, realizes higher flexibility.
By taking the core net of forth generation (4th Generation, 4G) system as an example, third generation partner program (the 3rd Generation Partnership Project, 3GPP) propose gateway (Serving Gateway, SGW) and Packet data gateway (Packet Data Network Gateway, PDN-GW or PGW) is divided into control plane functional entity With user plane functions entity, and the interface between control plane functional entity and user plane functions entity is increased.Wherein, will SGW is divided into the user plane (serving of control plane (serving gateway control plane) network element and SGW of SGW Gateway user plane) network element, PGW is divided into control plane (PDN gateway control plane) network element of PGW With user plane (PDN gateway user plane) network element of PGW.Wherein, the control plane network element of SGW and user plane network element can To be respectively depicted as SGW-C and SGW-U, the control plane network element and user plane network element of PGW can be respectively depicted as PGW-C and PGW- U.SGW-C and PGW-C can be deployed on same physical equipment, close the gateway that the SGW-C set and PGW-C is properly termed as unification Control plane network element, such as SGW/PGW-C can be described as；SGW-U and PGW-U can also be deployed on same physical equipment, It closes the SGW-U set and PGW-U and is properly termed as the gateway customer veil member of unification, such as SGW/PGW-C can be described as.It is above-mentioned SGW-C, PGW-C, SGW/PGW-C belong to control plane network element, and SGW-U, PGW-U, SGW/PGW-U belong to user plane network element.Control Being established between veil member and user plane network element has control plane tunnel (control plane tunnel) and user plane tunnel (user Plane tunnel), control plane tunnel is mainly used for transmission control plane signaling, and user plane tunnel is mainly used for transmitting user plane number According to.
Currently, in control plane and the scene of user plane separation, the user plane tunnel between control plane network element and user plane network element Road also retains always in the case where no data transmits, and results in waste of resources.
Invention content
An embodiment of the present invention provides a kind of method, network element and the systems in deletion user plane tunnel, with to avoid existing side In case the problem of the wasting of resources.
On the one hand, an embodiment of the present invention provides a kind of method in deletion user plane tunnel, it is applied in communication system, it should Communication system includes control plane network element and user plane network element, has at least one user between control plane network element and user plane network element Face tunnel.This method includes：Control plane network element determines that there is the target for meeting preset condition at least one user plane tunnel uses Family face tunnel；Control plane network element sends solicited message to user plane network element, and solicited message is used to indicate user plane network element and deletes mesh Mark user plane tunnel；User plane network element is according to solicited message, delete target user plane tunnel.
In scheme provided in an embodiment of the present invention, determine there is symbol at least one user plane tunnel by control plane network element The target user face tunnel of preset condition is closed, and user plane network element is asked to delete the target user face tunnel, hence for control The scene in face and user plane separation, provides the technical side for deleting the user plane tunnel between control plane network element and user plane network element Case so that user plane tunnel is deleted when that need not use, to avoid user plane tunnel long-term existence, to save resource.
Optionally, for varigrained user plane tunnel, preset condition can be different.Wherein, user plane tunnel institute is right The granularity answered can be terminal granularity, session granularity, carrying granularity or equipment granularity.
In a possible design, user plane tunnel counterpart terminal granularity.In above-mentioned at least one user plane tunnel Each user plane tunnel is used for transmission and the relevant data of terminal.Target user face tunnel is used for transmission and target terminal Relevant data.Preset condition includes one of following situation：(1) it needs to delete with the relevant whole sessions of target terminal；(2) it controls What is cached in veil member processed has reached the largest buffered amount distributed for target terminal with the relevant data of target terminal；(3) it controls What is cached in veil member processed is all sent to user plane network element with the relevant data of target terminal；(4) control plane network element receives The instruction of legal interception system, which, which is used to indicate, no longer needs to monitor and the relevant data of target terminal.
In another possible design, user plane tunnel respective session granularity.In above-mentioned at least one user plane tunnel Each user plane tunnel be used for transmission and the relevant data of session.Target user face tunnel is used for transmission and target meeting Talk about relevant data.Preset condition includes one of following situation：(1) target session needs to delete；(2) target session includes being used for At least one session of transmission and the relevant data of target terminal, and cached in control plane network element relevant with target terminal Data have reached the largest buffered amount distributed for target terminal；(3) target session is relevant with target terminal including being used for transmission At least one session of data, and what is cached in control plane network element is all sent to user plane with the relevant data of target terminal Network element；(4) target session includes at least one session being used for transmission with the relevant data of target terminal, and control plane network element is received To the instruction of legal interception system, which, which is used to indicate, no longer needs to monitor and the relevant data of target terminal.
In another possible design, user plane tunnel corresponds to carrying granularity.In above-mentioned at least one user plane tunnel Each user plane tunnel be used for transmission and the relevant data of carrying.Target user face tunnel is used for transmission to be held with target Carry relevant data.Preset condition includes one of following situation：(1) target carrying is to be used for transmission and the relevant number of target session According at least one carrying, and target session needs to delete；(2) target carrying is to be used for transmission and the relevant data of target terminal At least one carrying, and cached in control plane network element with the relevant data of target terminal have reached for target terminal distribute Largest buffered amount；(3) target carrying is to be used for transmission and at least one of the relevant data of target terminal carrying, and control plane What is cached in network element is all sent to user plane network element with the relevant data of target terminal；(4) target carrying is to be used for transmission It is carried at least one of the relevant data of target terminal, and control plane network element receives the instruction of legal interception system, the instruction It is used to indicate and no longer needs to monitor and the relevant data of target terminal.
In another possible design, user plane tunnel corresponds to equipment granularity.Above-mentioned at least one user plane tunnel packet A user plane tunnel is included, target user face tunnel is this user plane tunnel.Target user face tunnel is used for transmission and controls The relevant data of all terminals of veil member and user plane network element common service processed.Preset condition includes one of following situation：(1) It needs to delete by whole sessions of this user plane tunnel transmission；(2) having been cached in control plane network element with all terminals In each relevant data of terminal have reached the largest buffered amount for each terminal distribution；(3) it is cached in control plane network element It is all sent to user plane network element with the relevant data of each terminal in all terminals；(4) control plane network element receives legal prison The instruction of system is listened, which, which is used to indicate, no longer needs to monitor and the relevant data of any terminal in all terminals.
The embodiment of the present invention is for the different grain size and session deletion, data buffer storage, data corresponding to user plane tunnel 4 different application scenarios of forwarding and Lawful Interception etc. each provide corresponding preset condition, and realization is in different application scene It is lower to delete user plane tunnel on demand.The deletion in user plane tunnel can be not exclusively by the business between terminal and the network element of data network State determines, can also be decided whether to delete user plane tunnel according to actual data transfer demands, when determining a certain user plane tunnel The user plane tunnel can be deleted when not having data to need transmission on road, to discharge the occupied resource in user plane tunnel, is reached To the purpose for saving resource.
In another possible design, for data buffer storage scene, largest buffered amount can also correspond to user plane tunnel point Match.Correspondingly, preset condition can be：By target user face tunnel the data of control plane network element have been transmitted to from user plane network element It is reached for the largest buffered amount of target user face tunnel distributing.In this case, the granularity corresponding to user plane tunnel can be Equipment granularity, terminal granularity, session granularity or carrying granularity.
It, can also be to control veil after user plane network element delete target user plane tunnel in a possible design Member sends response message, which is used to indicate the delete target user plane tunnel that succeeded.Correspondingly, control plane network element from User plane network element receives response message.By the above-mentioned means, control plane network element is able to confirm that whether target user face tunnel has become Work(is deleted.
In a possible design, before or after control plane network element sends solicited message to user plane network element, also It can determine and need to create new user plane tunnel, and request to create is sent to user plane network element, which is used to indicate User plane network element creates new user plane tunnel.Correspondingly, user plane network element can create new user plane tunnel according to request to create Road.The embodiment of the present invention additionally provides the technical solution for creating the user plane tunnel between control plane network element and user plane network element, So that creating user plane tunnel when there is demand.
On the other hand, the embodiment of the present invention provides a kind of control plane network element, which, which has, realizes the above method The function of control plane network element behavior in example.The function can also be executed corresponding by hardware realization by hardware Software realization.The hardware or software include one or more modules corresponding with above-mentioned function.
In a possible design, the structure of control plane network element includes processor and communication interface, the processor It is configured as that control plane network element is supported to execute corresponding function in the above method.The communication interface is for supporting control plane network element With the communication between user plane network element or other equipment.Further, control plane network element can also include memory, the storage Device preserves the necessary program instruction of control plane network element and data for being coupled with processor.
Another aspect, the embodiment of the present invention provide a kind of user plane network element, which, which has, realizes the above method The function of user plane network element behavior in example.The function can also be executed corresponding by hardware realization by hardware Software realization.The hardware or software include one or more modules corresponding with above-mentioned function.
In a possible design, the structure of user plane network element includes processor and communication interface, the processor It is configured as that user plane network element is supported to execute corresponding function in the above method.The communication interface is for supporting user plane network element With the communication between control plane network element or other equipment.Further, user plane network element can also include memory, the storage Device preserves the necessary program instruction of user plane network element and data for being coupled with processor.
In another aspect, the embodiment of the present invention provides a kind of communication system, which includes the control plane described in above-mentioned aspect Network element and user plane network element.
In another aspect, the embodiment of the present invention provides a kind of computer storage media, it is above-mentioned for control plane for being stored as Computer software instructions used in network element, it includes for executing the program designed by above-mentioned aspect.
In another aspect, the embodiment of the present invention provides a kind of computer storage media, it is above-mentioned for user plane for being stored as Computer software instructions used in network element, it includes for executing the program designed by above-mentioned aspect.
Compared to the prior art, in the scheme of the embodiment of the present invention, at least one user plane is determined by control plane network element There is the target user face tunnel for meeting preset condition in tunnel, and user plane network element asked to delete the target user face tunnel, Hence for the scene that control plane and user plane detach, the user plane deleted between control plane network element and user plane network element is provided The technical solution in tunnel so that user plane tunnel is deleted when that need not use, to avoid user plane tunnel long-term existence, thus Save resource.
Description of the drawings
Figure 1A is a kind of schematic diagram of possible application scenarios provided in an embodiment of the present invention；
Figure 1B is a kind of schematic diagram of possible network architecture provided in an embodiment of the present invention；
Fig. 2 is a kind of communication scheme of method for deleting user plane tunnel provided in an embodiment of the present invention；
Fig. 3 is the communication scheme of another method for deleting user plane tunnel provided in an embodiment of the present invention；
Fig. 4 is the communication scheme of the method in another deletion user plane tunnel provided in an embodiment of the present invention；
Fig. 5 is the communication scheme of the method in another deletion user plane tunnel provided in an embodiment of the present invention；
Fig. 6 is the communication scheme of the method in another deletion user plane tunnel provided in an embodiment of the present invention；
Fig. 7 A are a kind of schematic block diagrams of control plane network element provided in an embodiment of the present invention；
Fig. 7 B are a kind of structural schematic diagrams of control plane network element provided in an embodiment of the present invention；
Fig. 8 A are a kind of schematic block diagrams of user plane network element provided in an embodiment of the present invention；
Fig. 8 B are a kind of structural schematic diagrams of user plane network element provided in an embodiment of the present invention.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical solution in the embodiment of the present invention is described.
The network architecture and business scenario of description of the embodiment of the present invention are to clearly illustrate implementation of the present invention The technical solution of example, does not constitute the restriction to technical solution provided in an embodiment of the present invention, those of ordinary skill in the art can Know, with the appearance of the differentiation and new business scene of the network architecture, technical solution provided in an embodiment of the present invention is for similar Technical problem, it is equally applicable.
Combine Figure 1A and Figure 1B to some applicable possible application scenarios of the embodiment of the present invention and network rack first below Structure is introduced.
Figure 1A shows a kind of application scenarios that the embodiment of the present invention may be applicable in.As shown in Figure 1A, terminal passes through wireless Access net and core net access carrier Internet protocol (Internet Protocol, IP) business network, such as multimedia System (IP Multimedia System, IMS) network, packet switch stream business (Packet Switched Streaming Service, simple PSS) network etc..The technical solution that the present invention describes can be adapted for long term evolution (Long Term Evolution, LTE) system or other use various wireless access technologys wireless communication system, for example, by using CDMA (Code Division Multiple Access, CDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), time division multiple acess (Time Division Multiple Access, TDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single-carrier frequency division multiple access (Single Carrier Frequency Division Multiple Access, SC-FDMA) etc. access technologies system.In addition, may be used also To be suitable for the subsequent evolution system of LTE system, such as NGN system, i.e. the 5th generation (5th Generation, 5G) system System etc..For clarity, it is only illustrated by taking LTE system as an example here.In LTE system, the general land of evolution wirelessly connects (Evolved Universal Terrestrial Radio Access Network, E-UTRAN) is networked as wireless access Net, evolution block core net (Evolved Packet Core, EPC) are used as core net.Terminal is accessed by E-UTRAN and EPC IMS network.
Based on above application scene, Figure 1B shows a kind of possible network architecture provided in an embodiment of the present invention.Such as figure Shown in 1B, which includes：Control plane network element 110 and user plane network element 120.
Control plane network element 110 is for realizing the network equipment of control plane function.For example, control plane function includes wireless money The management in source, the foundation of wireless connection, service quality (Quality of Service, QoS) guarantee of business etc..User's veil Member 120 is the network equipment for realizing user plane functions.User plane functions include mainly sending and receiving business datum.
One control plane network element 110 can control one or more user plane network element 120, a user plane veil member 120 can also be controlled by one or more control plane network element 110.Have between control plane network element 110 and user plane network element 120 At least one user plane tunnel (user plane tunnel).User plane tunnel is used for transmission user face data namely business number According to.In addition, also having at least one control plane tunnel (control between control plane network element 110 and user plane network element 120 plane tunnel).Control plane tunnel is used for transmission control plane signaling.
Optionally, control plane network element 110 and user plane network element 120 are the equipment in the core net of communication system.Such as Figure 1B Shown, which further includes：Access network equipment 130 and terminal 140.
Access network equipment 130 can be base station (Base Station, BS), and the base station is that one kind being deployed in wireless access Providing the device of wireless communication function for terminal in net.The base station may include various forms of macro base stations, micro-base station, Relay station, access point etc..In the system using different wireless access technologys, the title for having the equipment of base station functions can It can will be different, such as in LTE system, the node B (evolved NodeB, eNB or eNodeB) of referred to as evolution, in 3G In communication system, referred to as node B (Node B) etc..It is above-mentioned to be provided wirelessly for terminal in the embodiment of the present invention for convenience of description The device of communication function is referred to as access network equipment.
Terminal 140 may include various handheld devices with wireless communication function, mobile unit, wearable device, meter It calculates equipment or is connected to other processing equipments of radio modem and various forms of user equipment (User Equipment, UE), mobile station (Mobile Station, MS), terminal device (terminal device) etc..For convenience Description, apparatus mentioned above are referred to as terminal.
It is communicated by certain technology of eating dishes without rice or wine between access network equipment 130 and terminal 140, such as honeycomb skill can be passed through Art communicates.In addition, can also pass through skill of eating dishes without rice or wine between access network equipment 130 and control plane network element 110 and user plane network element 120 Art realization communicates, and can also be communicated by technology realization of eating dishes without rice or wine between terminal 140 and control plane network element 110.User plane The also accessible data network (Data Network) of network element 120, such as public data network (Public Data Network, PDN)。
In the embodiment of the present invention, noun " network " and " system " are often used alternatingly, but those skilled in the art can manage Solve its meaning.In the embodiment of the present invention, control plane network element 110 and user plane network element 120 can be there are many possible ways of realization. For example, in LTE system, control plane network element 110 can be：SGW-C, PGW-C, flow detection function (Traffic Detection Function, TDF) entity control plane network element, SGW/PGW-C；User plane network element 120 can be：SGW-U、 User plane network element, the SGW/PGW-U of PGW-U, TDF entity, wherein the control plane network element and user plane network element of TDF entities can be with It is respectively depicted as TDF-C and TDF-U.In another example in next generation network, control plane network element 110 can be next generation network The control plane network element of (Next Generation, NG), user plane network element 120 can be the user plane network elements of next generation network, In, the control plane network element and user plane network element of next generation network can be respectively depicted as NG-CP and NG-UP.It should be noted that When the scheme of the embodiment of the present invention be applied to 5G systems or the future may appear other systems when, control plane network element, user plane The title of network element, access network equipment, terminal etc. may change, but this has no effect on the implementation of the embodiment of the present invention.
Currently, in control plane and the scene of user plane separation, the user plane tunnel between control plane network element and user plane network element Road also retains always in the case where no data transmits, and results in waste of resources.In view of this, an embodiment of the present invention provides one kind The method for deleting user plane tunnel, and the control plane network element based on this method, user plane network element and system, this method are applied to In communication system, communication system includes control plane network element and user plane network element, is had between control plane network element and user plane network element At least one user plane tunnel.Technical solution provided in an embodiment of the present invention, core concept are that setting deletes user for triggering The preset condition in face tunnel deletes the user plane tunnel when a certain user plane tunnel meets the preset condition.
It is further detailed to the embodiment of the present invention below by the general character being related to based on invention described above embodiment aspect It describes in detail bright.
Fig. 2 is a kind of communication scheme of method for deleting user plane tunnel provided in an embodiment of the present invention.This method can To include such as lower part.
In 201 parts, control plane network element determines that there is the target for meeting preset condition at least one user plane tunnel uses Family face tunnel.
Specifically, having at least one user plane tunnel between control plane network element and user plane network element.For user plane tunnel The quantity of different grain size corresponding to road, the user plane tunnel between control plane network element and user plane network element can be different.For example, When user plane tunnel corresponds to equipment granularity, there is a user plane tunnel between control plane network element and user plane network element.Example again Such as, when user plane tunnel counterpart terminal granularity, there is at least one user plane tunnel between control plane network element and user plane network element Road, each user plane tunnel in at least one user plane tunnel are used for transmission and the relevant data of terminal.Example again Such as, when user plane tunnel respective session granularity, there is at least one user plane tunnel between control plane network element and user plane network element Road, each user plane tunnel in at least one user plane tunnel are used for transmission and the relevant data of session.Example again Such as, when user plane tunnel corresponds to carrying granularity, there is at least one user plane tunnel between control plane network element and user plane network element Road, each user plane tunnel in at least one user plane tunnel is used for transmission and the relevant data of carrying.
Below to above involved session (session), carrying (bearer), preset condition, target user face tunnel Make exemplary introduction in road etc..
Session can refer within a unbroken specific operation time, the communication interaction between two equipment.At one Ession for telecommunication, all messages transmitted between two equipment belong to the session.In embodiments of the present invention, session refers to end The communication interaction of business datum is used for transmission between network element in end and data network.It can pass through with the relevant data of terminal At least one session transmissions.
Carrying can refer to a data access of transmitting wireless service data.Involved by embodiments of the present invention Carrying is referred to as radio bearer, refers to the data that business datum is used for transmission between the network element in terminal and data network Access.Can be by least one session transmissions with the relevant data of terminal, it can be by extremely with the relevant data of session Few carrying transmission.
Preset condition can refer to preset for determining whether user plane tunnel needs the decision condition deleted.Not In same application scenarios, preset condition is different.In addition, being directed to varigrained user plane tunnel, preset condition is also It is different.Detailed description in relation to preset condition see below.
Target user face tunnel can be the arbitrary one or more user plane tunnel in above-mentioned at least one user plane tunnel Road.
In 202 parts, control plane network element sends solicited message to user plane network element, and solicited message is used to indicate user's veil First delete target user plane tunnel.
Correspondingly, user plane network element receives solicited message from control plane network element.
In one example, it can be carried in solicited message at least one of following：It is used to indicate and deletes user plane tunnel Indicate information, the mark in target user face tunnel, the corresponding message forward rule in target user face tunnel or target user face tunnel The corresponding message matching rule in road.
In a kind of possible embodiment, the mark in target user face tunnel is carried in solicited message, to notify to use Family veil member needs the target user face tunnel deleted.For example, the granularity corresponding to user plane tunnel is terminal granularity, session When granularity or carrying granularity, since a plurality of user plane tunnel can be established between control plane network element and user plane network element, ask It asks in information in addition to carrying above-mentioned instruction information, it is also necessary to the target user face tunnel for needing to delete is identified in solicited message Road.In another example when the granularity corresponding to the user plane tunnel is equipment granularity, due between control plane network element and user plane network element An only user plane tunnel, therefore above-mentioned instruction information is only carried in solicited message, it may not be necessary in solicited message Carry the mark in this user plane tunnel.
In a kind of possible embodiment, tunnel corresponding message forwarding rule in target user face are carried in solicited message Then and/or message matching rule, to which user plane network element can corresponding message forwarding rule in delete target user plane tunnel accordingly Then and/or message matching rule and other contextual informations.
In 203 parts, user plane network element is according to solicited message, delete target user plane tunnel.
Specifically, user plane network element can determine the target user face tunnel for needing to delete after receiving solicited message Then the target user face tunnel is deleted in road.For example, user plane network element delete target user plane tunnel can be in the following manner It realizes：Discharge the occupied resource in target user face tunnel, corresponding contextual information in delete target user plane tunnel, etc..
In one example, user plane network element can be sent after delete target user plane tunnel to control plane network element Response message, the response message are used to indicate the delete target user plane tunnel that succeeded.Correspondingly, control plane network element is from user plane Network element receives after response message, you can confirms that target user face tunnel has been deleted.
It should be noted that by the agency of above, in addition to having at least one between control plane network element and user plane network element Except user plane tunnel, there can also be at least one control plane tunnel.It can lead between control plane network element and user plane network element Cross control plane tunnel transmitting-receiving solicited message and response message.
In scheme provided in an embodiment of the present invention, determine there is symbol at least one user plane tunnel by control plane network element The target user face tunnel of preset condition is closed, and user plane network element is asked to delete the target user face tunnel, hence for control The scene in face and user plane separation, provides the technical side for deleting the user plane tunnel between control plane network element and user plane network element Case so that user plane tunnel can be deleted when that need not use, to avoid user plane tunnel long-term existence, to save money Source.
In the following, for the different grain size corresponding to user plane tunnel, to the preset condition involved by the embodiment of the present invention into Row further illustrates.
1, user plane tunnel counterpart terminal granularity
When user plane tunnel counterpart terminal granularity, have between control plane network element and user plane network element at least one use Each user plane tunnel in the tunnel of family face is used for transmission and the relevant data of terminal.Target user face tunnel is for passing The defeated and relevant data of target terminal, target terminal is in all terminals of control plane network element and user plane network element common service Any one terminal.Preset condition may include one of following situation：
(a) it needs to delete with the relevant whole sessions of target terminal.
In which case, user plane tunnel can be deleted in scene is deleted in session.
Quantity with the relevant session of target terminal can be one, can also be multiple.These are related to target terminal Session be used for transmission and the relevant data of target terminal.For example, including with the relevant data of target terminal：Target terminal is to number The downlink business number sent to target terminal according to the uplink business data that the network element in network is sent, the network element in data network According to.When user plane tunnel counterpart terminal granularity, it is assumed that target terminal correspond to target user face tunnel, then with target terminal phase The data of whole sessions of pass are transmitted on the tunnel of target user face.It needs to delete when with the relevant whole sessions of target terminal When, illustrate not need, by target user face tunnel transmission, to trigger delete target at this time with the relevant data of target terminal User plane tunnel.
In an example it is assumed that having 3 user plane tunnels between control plane network element and user plane network element, respectively use Family face tunnel 1, user plane tunnel 2 and user plane tunnel 3.Wherein, user plane tunnel 1 be used for transmission with 1 relevant data of terminal, User plane tunnel 2 is used for transmission to be used for transmission and 3 relevant data of terminal with 2 relevant data of terminal, user plane tunnel 3.With For terminal 1, it is assumed that being established between the network element in terminal 1 and data network has 2 sessions, when this 2 sessions all need to delete Except when, control plane network element, which determines, deletes terminal 1 corresponding user plane tunnel 1, and control plane network element sends to user plane network element and carries User plane tunnel 1 is deleted after having the solicited message of the mark in user plane tunnel 1, user plane network element to receive the solicited message.
In addition, the reason of needing to delete with the relevant whole sessions of target terminal may include one of following situation：Target The service disconnection between network element in terminal and data network；Target terminal attachment removal flow；It is sent out in target terminal attachment flow Existing target terminal leads to the context for still having activation in control plane network element due to attachment removal unreasonable before；Tracing section updating Or target terminal update position is rejected in Routing Area Update flow, etc..
(b) what is cached in control plane network element has reached the maximum distributed for target terminal with the relevant data of target terminal Buffer memory.
In which case, user plane tunnel can be deleted in data buffer storage scene.
Specifically, when target terminal is in Idle state, user plane network element is receiving and the relevant data of target terminal It, will be with by target user face tunnel after (such as the network element in data network sent to target terminal downlink service data) The relevant data forwarding of target terminal gives control plane network element, these data are cached by control plane network element.Subsequently, when target terminal from When Idle state is restored to connected state, caching and the relevant data of target terminal are sent to user plane network element by control plane network element, These data are sent from user plane network element to target terminal.
The largest buffered amount of promising each terminal distribution is configured in control plane network element.The corresponding largest buffered amount of each terminal It can be distributed by control plane network element, can also be distributed by other equipment and notify to give control plane network element.For example, working as control plane network element For SGW-C when, the corresponding largest buffered amount of each terminal can be by mobility management entity (Mobility Management Entity, MME) it distributes and notifies to SGW-C.Largest buffered amount for target terminal distribution, which refers to control plane network element, to be cached The maximum quantity with the relevant data of target terminal.Largest buffered amount for the distribution of each different terminals can be identical, also may be used With difference, the embodiment of the present invention is not construed as limiting this.Optionally, largest buffered amount is down buffer storage suggested quantity (downlink buffering suggested count).By taking target terminal as an example, when having been cached in control plane network element and target terminal phase When the data of pass have reached the largest buffered amount distributed for target terminal, control plane network element can not continue storage and target terminal Relevant data, at this time user plane network element can will be given with the relevant data forwarding of target terminal without going through target user face tunnel Control plane network element is cached, and target user face tunnel can be deleted.
In an example it is assumed that having 3 user plane tunnels between control plane network element and user plane network element, respectively use Family face tunnel 1, user plane tunnel 2 and user plane tunnel 3.Wherein, user plane tunnel 1 be used for transmission with 1 relevant data of terminal, User plane tunnel 2 is used for transmission to be used for transmission and 3 relevant data of terminal with 2 relevant data of terminal, user plane tunnel 3.With For terminal 1, it is assumed that the largest buffered amount for being the distribution of terminal 1 is a.When terminal 1 is in Idle state, user plane network element is receiving To with after 1 relevant data of terminal, control plane network element will be given with 1 relevant data forwarding of terminal by user plane tunnel 1, by Control plane network element caches these data.Reach largest buffered amount a with 1 relevant data of terminal when having been cached in control plane network element When, control plane network element, which determines, deletes 1 corresponding user plane tunnel 1 of terminal, and control plane network element is carried to the transmission of user plane network element The solicited message of the mark in user plane tunnel 1, user plane network element delete user plane tunnel 1 after receiving the solicited message.
Illustratively, for the situation in the deletion user plane tunnel in data buffer storage scene, the control plane network element being related to is SGW-C and user plane network element are SGW-U, or the control plane network element being related to is SGW/PGW-C and user plane network element is SGW/ PGW-U, or the control plane network element that is related to is NG-CP and user plane network element is NG-UP.
(c) what is cached in control plane network element is all sent to user plane network element with the relevant data of target terminal.
In which case, user plane tunnel can be deleted in data forwarding scene.
By the agency of above, when target terminal is in Idle state, user plane network element is receiving and target terminal phase After the data of pass, control plane network element will be given with the relevant data forwarding of target terminal by target user face tunnel, by controlling Veil member caches these data.Subsequently, when target terminal restores from Idle state to connected state, control plane network element by caching with The relevant data of target terminal are sent to user plane network element, these data are sent from user plane network element to target terminal.
By taking target terminal as an example, it is all sent to use with the relevant data of target terminal when being cached in control plane network element When the veil member of family, do not needed through target user face tunnel transmission with the relevant data of target terminal in control plane network element, Target user face tunnel can be deleted at this time.
In an example it is assumed that having 3 user plane tunnels between control plane network element and user plane network element, respectively use Family face tunnel 1, user plane tunnel 2 and user plane tunnel 3.Wherein, user plane tunnel 1 be used for transmission with 1 relevant data of terminal, User plane tunnel 2 is used for transmission to be used for transmission and 3 relevant data of terminal with 2 relevant data of terminal, user plane tunnel 3.With For terminal 1, when terminal 1 is restored from Idle state to connected state, control plane network element is by user plane tunnel 1 by caching and end It holds 1 relevant data to be sent to user plane network element, these data is sent from user plane network element to terminal 1.When in control plane network element When being all sent to user plane network element with 1 relevant data of terminal of caching, control plane network element determine that deletion terminal 1 is corresponding User plane tunnel 1, control plane network element send the solicited message for the mark for carrying user plane tunnel 1, user to user plane network element Veil member deletes user plane tunnel 1 after receiving the solicited message.
Illustratively, for the situation in the deletion user plane tunnel in data forwarding scene, the control plane network element being related to is SGW-C and user plane network element are SGW-U, or the control plane network element being related to is SGW/PGW-C and user plane network element is SGW/ PGW-U, or the control plane network element that is related to is NG-CP and user plane network element is NG-UP.
(d) control plane network element receives the instruction of legal interception system, which, which is used to indicate, no longer needs monitoring and target The relevant data of terminal.
In which case, user plane tunnel can be deleted in Lawful Interception scene.
In Lawful Interception scene, if legal interception system needs to monitor and the relevant data of target terminal, user plane Network element receive with after the relevant data of target terminal, will be with the relevant data of target terminal by target user face tunnel It is sent to control plane network element, by control plane network element by these data forwardings to legal interception system.User plane network element is sent to control The data of veil member processed can be the data copy that user plane network element generates, and can also include other data type informations.Control The data that veil member is transmitted to legal interception system can be that control plane network element carries out treated data or other information.
If legal interception system no longer need to monitor with the relevant data of target terminal, legal interception system can be to Control plane network element sends Lawful Interception and deactivates message, which deactivates message and be used to indicate deactivation and target terminal Relevant Lawful Interception function, subsequent user veil member need not will be sent to control plane network element again with the relevant data of target terminal It is transmitted to legal interception system, target user face tunnel can be deleted at this time.
In an example it is assumed that having 3 user plane tunnels between control plane network element and user plane network element, respectively use Family face tunnel 1, user plane tunnel 2 and user plane tunnel 3.Wherein, user plane tunnel 1 be used for transmission with 1 relevant data of terminal, User plane tunnel 2 is used for transmission to be used for transmission and 3 relevant data of terminal with 2 relevant data of terminal, user plane tunnel 3.With For terminal 1, after legal interception system activation is with 1 relevant Lawful Interception function of terminal, user plane network element passes through user Face tunnel 1 will be sent to control plane network element with 1 relevant data of terminal, these data forwardings are given to legal prison by control plane network element Listen system.Control plane network element receive legal interception system transmission be used to indicate deactivation and the relevant legal prison of terminal 1 After the Lawful Interception of auditory function deactivates message, determine and delete 1 corresponding user plane tunnel 1 of terminal, control plane network element to Family veil member sends the solicited message for the mark for carrying user plane tunnel 1, and user plane network element receives after the solicited message Delete user plane tunnel 1.
Illustratively, for the situation in the deletion user plane tunnel in Lawful Interception scene, the control plane network element being related to is SGW-C and user plane network element are SGW-U, the control plane network element being either related to be PGW-C and user plane network element be PGW-U or The control plane network element being related to is SGW/PGW-C and user plane network element is SGW/PGW-U, or the control plane network element being related to is NG- CP and user plane network element are NG-UP.
It should be added that when user plane tunnel counterpart terminal granularity, a terminal can correspond to a user Face tunnel, in this case, target terminal corresponding target user face tunnel are a user plane tunnel；Alternatively, one Terminal can also correspond at least two user plane tunnels, and in this case, target terminal corresponding target user face tunnel can To include at least two user plane tunnels.
2, user plane tunnel respective session granularity
When user plane tunnel respective session granularity, have between control plane network element and user plane network element at least one use Each user plane tunnel in the tunnel of family face is used for transmission and the relevant data of session.Target user face tunnel is for passing The defeated and relevant data of target session.Preset condition may include one of following situation：
(a) target session needs to delete.
In which case, user plane tunnel can be deleted in scene is deleted in session.
When user plane tunnel respective session granularity, it is assumed that target session correspond to target user face tunnel, then with target The relevant data of session are transmitted on the tunnel of target user face.When target session need delete when, illustrate not with target meeting Relevant data are talked about to need, by target user face tunnel transmission, to trigger delete target user plane tunnel at this time.
In an example it is assumed that having 3 user plane tunnels between control plane network element and user plane network element, respectively use Family face tunnel 1, user plane tunnel 2 and user plane tunnel 3.Wherein, user plane tunnel 1 be used for transmission with 1 relevant data of session, User plane tunnel 2 is used for transmission to be used for transmission and 3 relevant data of session with 2 relevant data of session, user plane tunnel 3.With For session 1, when session 1 needs to delete, control plane network element, which determines, deletes 1 corresponding user plane tunnel 1 of session, controls veil Member sends the solicited message for the mark for carrying user plane tunnel 1 to user plane network element, and user plane network element receives request letter User plane tunnel 1 is deleted after breath.
In addition, target session may include one of following situation the reason of needing to delete：In target terminal and data network Network element between service disconnection；Target terminal attachment removal flow；Find target terminal due to it in target terminal attachment flow Preceding unreasonable attachment removal leads to the context for still having activation in control plane network element；Tracing section updating or Routing Area Update flow Middle target terminal update position is rejected, and flow is deleted in the session that target terminal or network are initiated, etc..Wherein, target session is Session between target terminal and the network element of data network.
(b) target session includes at least one session being used for transmission with the relevant data of target terminal, and controls veil What is cached in member has reached the largest buffered amount distributed for target terminal with the relevant data of target terminal.
In which case, user plane tunnel can be deleted in data buffer storage scene.
Specifically, when target terminal is in Idle state, user plane network element is receiving and the relevant data of target terminal It, will be with by target user face tunnel after (such as the network element in data network sent to target terminal downlink service data) The relevant data forwarding of target terminal gives control plane network element, these data are cached by control plane network element.Subsequently, when target terminal from When Idle state is restored to connected state, caching and the relevant data of target terminal are sent to user plane network element by control plane network element, These data are sent from user plane network element to target terminal.
The largest buffered amount of promising each terminal distribution is configured in control plane network element.The corresponding largest buffered amount of each terminal It can be distributed by control plane network element, can also be distributed by other equipment and notify to give control plane network element.For example, working as control plane network element For SGW-C when, the corresponding largest buffered amount of each terminal can be distributed by MME and be notified to SGW-C.For target terminal distribution Largest buffered amount refers to the maximum quantity with the relevant data of target terminal that control plane network element can cache.It is each different whole The largest buffered amount of end distribution may be the same or different, and the embodiment of the present invention is not construed as limiting this.Optionally, maximum slow Storage is down buffer storage suggested quantity (downlink buffering suggested count).By taking target terminal as an example, when Cached in control plane network element when having reached the largest buffered amount distributed for target terminal with the relevant data of target terminal, control Veil member processed can not continue storage and the relevant data of target terminal, and user plane network element can be without going through target user face at this time Tunnel will be cached with the relevant data forwarding of target terminal to control plane network element, and target user face tunnel can be deleted.
In an example it is assumed that having 5 user plane tunnels between control plane network element and user plane network element, respectively use Family face tunnel 1, user plane tunnel 2, user plane tunnel 3, user plane tunnel 4 and user plane tunnel 5.Wherein, user plane tunnel 1 is used In transmission with 1 relevant data of session, user plane tunnel 2 be used for transmission with 2 relevant data of session, user plane tunnel 3 is used for Transmission and 3 relevant data of session, user plane tunnel 4 is used for transmission to be used to pass with 4 relevant data of session, user plane tunnel 5 Defeated and 5 relevant data of session.Assuming that session 1, session 2 and session 3 are used for transmission and 1 relevant data of terminal, session 4 and meeting Words 5 are used for transmission and 2 relevant data of terminal.By taking terminal 1 as an example, it is assumed that the largest buffered amount for being the distribution of terminal 1 is a.Work as end When end 1 is in Idle state, user plane network element is being received with after 1 relevant data of terminal, passes through user plane tunnel 1,2 and 3 In one or more user plane tunnel will give control plane network element with 1 relevant data forwarding of terminal, cached by control plane network element These data.When cached in control plane network element reach largest buffered amount a with 1 relevant data of terminal when, control plane network element It determines and deletes 1 corresponding user plane tunnel 1,2 and 3 of terminal, control plane network element carries user plane tunnel to the transmission of user plane network element The solicited message of the mark in road 1,2 and 3, user plane network element delete user plane tunnel 1,2 and 3 after receiving the solicited message.
Illustratively, for the situation in the deletion user plane tunnel in data buffer storage scene, the control plane network element being related to is SGW-C and user plane network element are SGW-U, or the control plane network element being related to is SGW/PGW-C and user plane network element is SGW/ PGW-U, or the control plane network element that is related to is NG-CP and user plane network element is NG-UP.
(c) target session includes at least one session being used for transmission with the relevant data of target terminal, and controls veil What is cached in member is all sent to user plane network element with the relevant data of target terminal.
In which case, user plane tunnel can be deleted in data forwarding scene.
By the agency of above, when target terminal is in Idle state, user plane network element is receiving and target terminal phase After the data of pass, control plane network element will be given with the relevant data forwarding of target terminal by target user face tunnel, by controlling Veil member caches these data.Subsequently, when target terminal restores from Idle state to connected state, control plane network element by caching with The relevant data of target terminal are sent to user plane network element, these data are sent from user plane network element to target terminal.
By taking target terminal as an example, it is all sent to use with the relevant data of target terminal when being cached in control plane network element When the veil member of family, do not needed through target user face tunnel transmission with the relevant data of target terminal in control plane network element, Target user face tunnel can be deleted at this time.
In an example it is assumed that having 5 user plane tunnels between control plane network element and user plane network element, respectively use Family face tunnel 1, user plane tunnel 2, user plane tunnel 3, user plane tunnel 4 and user plane tunnel 5.Wherein, user plane tunnel 1 is used In transmission with 1 relevant data of session, user plane tunnel 2 be used for transmission with 2 relevant data of session, user plane tunnel 3 is used for Transmission and 3 relevant data of session, user plane tunnel 4 is used for transmission to be used to pass with 4 relevant data of session, user plane tunnel 5 Defeated and 5 relevant data of session.Assuming that session 1, session 2 and session 3 are used for transmission and 1 relevant data of terminal, session 4 and meeting Words 5 are used for transmission and 2 relevant data of terminal.By taking terminal 1 as an example, when terminal 1 is restored from Idle state to connected state, control plane Network element is sent caching and 1 relevant data of terminal by one or more user plane tunnel in user plane tunnel 1,2 and 3 User plane network element is given, these data are sent from user plane network element to terminal 1.It is related to terminal 1 when being cached in control plane network element Data when being all sent to user plane network element, control plane network element, which determines, deletes 1 corresponding user plane tunnel 1,2 and 3 of terminal, Control plane network element sends the solicited message for the mark for carrying user plane tunnel 1,2 and 3 to user plane network element, and user plane network element connects It receives the solicited message and deletes user plane tunnel 1,2 and 3 later.
Illustratively, for the situation in the deletion user plane tunnel in data forwarding scene, the control plane network element being related to is SGW-C and user plane network element are SGW-U, or the control plane network element being related to is SGW/PGW-C and user plane network element is SGW/ PGW-U, or the control plane network element that is related to is NG-CP and user plane network element is NG-UP.
(d) target session includes at least one session being used for transmission with the relevant data of target terminal, and controls veil Member receives the instruction of legal interception system, which, which is used to indicate, no longer needs to monitor and the relevant data of target terminal.
In which case, user plane tunnel can be deleted in Lawful Interception scene.
In Lawful Interception scene, if legal interception system needs to monitor and the relevant data of target terminal, user plane Network element receive with after the relevant data of target terminal, will be with the relevant data of target terminal by target user face tunnel It is sent to control plane network element, by control plane network element by these data forwardings to legal interception system.User plane network element is sent to control The data of veil member processed can be the data copy that user plane network element generates, and can also include other data type informations.Control The data that veil member is transmitted to legal interception system can be that control plane network element carries out treated data or other information.
If legal interception system no longer need to monitor with the relevant data of target terminal, legal interception system can be to Control plane network element sends Lawful Interception and deactivates message, which deactivates message and be used to indicate deactivation and target terminal Relevant Lawful Interception function, subsequent user veil member need not will be sent to control plane network element again with the relevant data of target terminal It is transmitted to legal interception system, target user face tunnel can be deleted at this time.
In an example it is assumed that having 5 user plane tunnels between control plane network element and user plane network element, respectively use Family face tunnel 1, user plane tunnel 2, user plane tunnel 3, user plane tunnel 4 and user plane tunnel 5.Wherein, user plane tunnel 1 is used In transmission with 1 relevant data of session, user plane tunnel 2 be used for transmission with 2 relevant data of session, user plane tunnel 3 is used for Transmission and 3 relevant data of session, user plane tunnel 4 is used for transmission to be used to pass with 4 relevant data of session, user plane tunnel 5 Defeated and 5 relevant data of session.Assuming that session 1, session 2 and session 3 are used for transmission and 1 relevant data of terminal, session 4 and meeting Words 5 are used for transmission and 2 relevant data of terminal.By taking terminal 1 as an example, when legal interception system activation is relevant legal with terminal 1 After monitor function, user plane network element will be with terminal 1 by one or more user plane tunnel in user plane tunnel 1,2 and 3 Relevant data are sent to control plane network element, by control plane network element by these data forwardings to legal interception system.Control veil Member is in the Lawful Interception for being used to indicate deactivation and 1 relevant Lawful Interception function of terminal for receiving legal interception system transmission It after deactivating message, determines and deletes 1 corresponding user plane tunnel 1,2 and 3 of terminal, control plane network element is sent to user plane network element The solicited message of the mark in user plane tunnel 1,2 and 3 is carried, user plane network element deletes user after receiving the solicited message Face tunnel 1,2 and 3.
Illustratively, for the situation in the deletion user plane tunnel in Lawful Interception scene, the control plane network element being related to is SGW-C and user plane network element are SGW-U, the control plane network element being either related to be PGW-C and user plane network element be PGW-U or The control plane network element being related to is SGW/PGW-C and user plane network element is SGW/PGW-U, or the control plane network element being related to is NG- CP and user plane network element are NG-UP.
3, user plane tunnel corresponds to carrying granularity
When user plane tunnel correspond to carrying granularity when, have between control plane network element and user plane network element at least one use Each user plane tunnel in the tunnel of family face is used for transmission and the relevant data of carrying.Target user face tunnel is for passing It is defeated to carry relevant data with target.Preset condition includes one of following situation：
(a) target carrying is at least one carrying being used for transmission with the relevant data of target session, and target session needs It deletes.
In which case, user plane tunnel can be deleted in scene is deleted in session.
When target session needs to delete, illustrate not need through target user face with the relevant data of target session Tunnel transmission triggers delete target user plane tunnel at this time.
In an example it is assumed that having 3 user plane tunnels between control plane network element and user plane network element, respectively use Family face tunnel 1, user plane tunnel 2 and user plane tunnel 3.Wherein, user plane tunnel 1 is used for transmission and carries 1 relevant data, User plane tunnel 2 is used for transmission to be used for transmission and 3 relevant data of carrying with 2 relevant data of carrying, user plane tunnel 3.It is false It is used for transmission and 2 relevant data of session with 1 relevant data of session, carrying 3 if carrying 1 and carrying 2 are used for transmission.With session For 1, when session 1 needs to delete, control plane network element, which determines, deletes 1 corresponding user plane tunnel 1 and 2 of session, controls veil Member sends the solicited message for the mark for carrying user plane tunnel 1 and 2 to user plane network element, and user plane network element receives the request User plane tunnel 1 and 2 is deleted after information.
In addition, target session may include one of following situation the reason of needing to delete：In target terminal and data network Network element between service disconnection；Target terminal attachment removal flow；Find target terminal due to unreasonable before in attachment flow Attachment removal lead to the context for still having activation in control plane network element；Target is whole in tracing section updating or Routing Area Update flow End update position is rejected, and flow is deleted in the session that target terminal or network are initiated, etc..Wherein, target session is target terminal Session between the network element of data network.
(b) target carrying is to be used for transmission and at least one of the relevant data of target terminal carrying, and control plane network element In cached have reached the largest buffered amount distributed for target terminal with the relevant data of target terminal.
In which case, user plane tunnel can be deleted in data buffer storage scene.
When target terminal is in Idle state, user plane network element receive with the relevant data of target terminal (such as count The downlink service data sent to target terminal according to the network element in network) after, it will be with target end by target user face tunnel It holds relevant data forwarding to give control plane network element, these data is cached by control plane network element.Subsequently, when target terminal is from Idle state When restoring to connected state, caching and the relevant data of target terminal are sent to user plane network element by control plane network element, by user Veil member sends these data to target terminal.
The largest buffered amount of promising each terminal distribution is configured in control plane network element.The corresponding largest buffered amount of each terminal It can be distributed by control plane network element, can also be distributed by other equipment and notify to give control plane network element.For example, working as control plane network element For SGW-C when, the corresponding largest buffered amount of each terminal can be distributed by MME and be notified to SGW-C.For target terminal distribution Largest buffered amount refers to the maximum quantity with the relevant data of target terminal that control plane network element can cache.It is each different whole The largest buffered amount of end distribution may be the same or different, and the embodiment of the present invention is not construed as limiting this.Optionally, maximum slow Storage is down buffer storage suggested quantity (downlink buffering suggested count).By taking target terminal as an example, when Cached in control plane network element when having reached the largest buffered amount distributed for target terminal with the relevant data of target terminal, control Veil member processed can not continue storage and the relevant data of target terminal, and user plane network element can be without going through target user face at this time Tunnel will be cached with the relevant data forwarding of target terminal to control plane network element, and target user face tunnel can be deleted.
In an example it is assumed that having 5 user plane tunnels between control plane network element and user plane network element, respectively use Family face tunnel 1, user plane tunnel 2, user plane tunnel 3, user plane tunnel 4 and user plane tunnel 5.Wherein, user plane tunnel 1 is used In transmission and 1 relevant data of carrying, user plane tunnel 2 is used for transmission and carries 2 relevant data, and user plane tunnel 3 is used for Transmission and 3 relevant data of carrying, user plane tunnel 4 are used for transmission and carry 4 relevant data, and user plane tunnel 5 is for passing Defeated and 5 relevant data of carrying.It 4 and is held with 1 relevant data of terminal, carrying assuming that carrying 1, carrying 2 and carrying 3 are used for transmission 5 are carried to be used for transmission and 2 relevant data of terminal.By taking terminal 1 as an example, it is assumed that the largest buffered amount for being the distribution of terminal 1 is a.Work as end When end 1 is in Idle state, user plane network element is being received with after 1 relevant data of terminal, passes through user plane tunnel 1,2 and 3 In one or more user plane tunnel will give control plane network element with 1 relevant data forwarding of terminal, cached by control plane network element These data.When cached in control plane network element reach largest buffered amount a with 1 relevant data of terminal when, control plane network element It determines and deletes 1 corresponding user plane tunnel 1,2 and 3 of terminal, control plane network element carries user plane tunnel to the transmission of user plane network element The solicited message of the mark in road 1,2 and 3, user plane network element delete user plane tunnel 1,2 and 3 after receiving the solicited message.
Illustratively, for the situation in the deletion user plane tunnel in data buffer storage scene, the control plane network element being related to is SGW-C and user plane network element are SGW-U, or the control plane network element being related to is SGW/PGW-C and user plane network element is SGW/ PGW-U, or the control plane network element that is related to is NG-CP and user plane network element is NG-UP.
(c) target carrying is to be used for transmission and at least one of the relevant data of target terminal carrying, and control plane network element Middle caching is all sent to user plane network element with the relevant data of target terminal.
In which case, user plane tunnel can be deleted in data forwarding scene.
By the agency of above, when target terminal is in Idle state, user plane network element is receiving and target terminal phase After the data of pass, control plane network element will be given with the relevant data forwarding of target terminal by target user face tunnel, by controlling Veil member caches these data.Subsequently, when target terminal restores from Idle state to connected state, control plane network element by caching with The relevant data of target terminal are sent to user plane network element, these data are sent from user plane network element to target terminal.
By taking target terminal as an example, it is all sent to use with the relevant data of target terminal when being cached in control plane network element When the veil member of family, do not needed through target user face tunnel transmission with the relevant data of target terminal in control plane network element, Target user face tunnel can be deleted at this time.
In an example it is assumed that having 5 user plane tunnels between control plane network element and user plane network element, respectively use Family face tunnel 1, user plane tunnel 2, user plane tunnel 3, user plane tunnel 4 and user plane tunnel 5.Wherein, user plane tunnel 1 is used In transmission and 1 relevant data of carrying, user plane tunnel 2 is used for transmission and carries 2 relevant data, and user plane tunnel 3 is used for Transmission and 3 relevant data of carrying, user plane tunnel 4 are used for transmission and carry 4 relevant data, and user plane tunnel 5 is for passing Defeated and 5 relevant data of carrying.It 4 and is held with 1 relevant data of terminal, carrying assuming that carrying 1, carrying 2 and carrying 3 are used for transmission 5 are carried to be used for transmission and 2 relevant data of terminal.By taking terminal 1 as an example, when terminal 1 is restored from Idle state to connected state, control plane Network element is sent caching and 1 relevant data of terminal by one or more user plane tunnel in user plane tunnel 1,2 and 3 User plane network element is given, these data are sent from user plane network element to terminal 1.It is related to terminal 1 when being cached in control plane network element Data when being all sent to user plane network element, control plane network element, which determines, deletes 1 corresponding user plane tunnel 1,2 and 3 of terminal, Control plane network element sends the solicited message for the mark for carrying user plane tunnel 1,2 and 3 to user plane network element, and user plane network element connects It receives the solicited message and deletes user plane tunnel 1,2 and 3 later.
Illustratively, for the situation in the deletion user plane tunnel in data forwarding scene, the control plane network element being related to is SGW-C and user plane network element are SGW-U, or the control plane network element being related to is SGW/PGW-C and user plane network element is SGW/ PGW-U, or the control plane network element that is related to is NG-CP and user plane network element is NG-UP.
(d) target carrying is to be used for transmission and at least one of the relevant data of target terminal carrying, and control plane network element The instruction of legal interception system is received, which, which is used to indicate, no longer needs to monitor and the relevant data of target terminal.
In which case, user plane tunnel can be deleted in Lawful Interception scene.
In Lawful Interception scene, if legal interception system needs to monitor and the relevant data of target terminal, user plane Network element receive with after the relevant data of target terminal, will be with the relevant data of target terminal by target user face tunnel It is sent to control plane network element, by control plane network element by these data forwardings to legal interception system.User plane network element is sent to control The data of veil member processed can be the data copy that user plane network element generates, and can also include other data type informations.Control The data that veil member is transmitted to legal interception system can be that control plane network element carries out treated data or other information.
If legal interception system no longer need to monitor with the relevant data of target terminal, legal interception system can be to Control plane network element sends Lawful Interception and deactivates message, which deactivates message and be used to indicate deactivation and target terminal Relevant Lawful Interception function, subsequent user veil member need not will be sent to control plane network element again with the relevant data of target terminal It is transmitted to legal interception system, target user face tunnel can be deleted at this time.
In an example it is assumed that having 5 user plane tunnels between control plane network element and user plane network element, respectively use Family face tunnel 1, user plane tunnel 2, user plane tunnel 3, user plane tunnel 4 and user plane tunnel 5.Wherein, user plane tunnel 1 is used In transmission and 1 relevant data of carrying, user plane tunnel 2 is used for transmission and carries 2 relevant data, and user plane tunnel 3 is used for Transmission and 3 relevant data of carrying, user plane tunnel 4 are used for transmission and carry 4 relevant data, and user plane tunnel 5 is for passing Defeated and 5 relevant data of carrying.It 4 and is held with 1 relevant data of terminal, carrying assuming that carrying 1, carrying 2 and carrying 3 are used for transmission 5 are carried to be used for transmission and 2 relevant data of terminal.By taking terminal 1 as an example, when legal interception system activation is relevant legal with terminal 1 After monitor function, user plane network element will be with terminal 1 by one or more user plane tunnel in user plane tunnel 1,2 and 3 Relevant data are sent to control plane network element, by control plane network element by these data forwardings to legal interception system.Control veil Member is in the Lawful Interception for being used to indicate deactivation and 1 relevant Lawful Interception function of terminal for receiving legal interception system transmission It after deactivating message, determines and deletes 1 corresponding user plane tunnel 1,2 and 3 of terminal, control plane network element is sent to user plane network element The solicited message of the mark in user plane tunnel 1,2 and 3 is carried, user plane network element deletes user after receiving the solicited message Face tunnel 1,2 and 3.
Illustratively, for the situation in the deletion user plane tunnel in Lawful Interception scene, the control plane network element being related to is SGW-C and user plane network element are SGW-U, the control plane network element being either related to be PGW-C and user plane network element be PGW-U or The control plane network element being related to is SGW/PGW-C and user plane network element is SGW/PGW-U, or the control plane network element being related to is NG- CP and user plane network element are NG-UP.
4, user plane tunnel corresponds to equipment granularity
When user plane tunnel corresponds to equipment granularity, have between control plane network element and user plane network element at least one use Family face tunnel includes a user plane tunnel, and target user face tunnel is this user plane tunnel.Target user face tunnel It is used for transmission the relevant data of all terminals with control plane network element and user plane network element common service.Preset condition may include One of following situation：
(a) it needs to delete by whole sessions of user plane tunnel transmission.
In which case, user plane tunnel can be deleted in scene is deleted in session.
Due to only having a user plane tunnel, each terminal and data network between control plane network element and user plane network element All sessions between the network element of network are transmitted on this user plane tunnel.If only partial session needs to delete, This user plane tunnel cannot be deleted, for transmitting other not deleted relevant data of session.When whole sessions When needing to delete, illustrate to need to transmit on this user plane tunnel without session, this user is deleted in triggering at this time Face tunnel.
In an example it is assumed that only having a user plane tunnel, control plane between control plane network element and user plane network element There are 3 sessions in total, respectively between network element and all terminals and the network element of data network of user plane network element common service Session 1, session 2 and session 3.All pass through this user plane tunnel transmission with this 3 relevant data of session.When this 3 When session all needs to delete, control plane network element, which determines, deletes this user plane tunnel, and control plane network element is to user plane network element Solicited message is sent, user plane network element deletes this user plane tunnel after receiving the solicited message.
(b) what is cached in control plane network element has reached with the relevant data of each terminal in all terminals as each end Hold the largest buffered amount of distribution.
In which case, user plane tunnel can be deleted in data buffer storage scene.
For any terminal (by taking target terminal as an example) of control plane network element and user plane network element common service, when target end End in Idle state when, user plane network element receive with the relevant data of target terminal (such as the network element in data network to The downlink service data that target terminal is sent) after, it will be related to target terminal by above-mentioned have user plane tunnel Data forwarding give control plane network element, these data are cached by control plane network element.Subsequently, when target terminal from Idle state restore to When connected state, caching and the relevant data of target terminal are sent to user by control plane network element by this user plane tunnel Veil member, these data are sent from user plane network element to target terminal.
The largest buffered amount of promising each terminal distribution is configured in control plane network element.The corresponding largest buffered amount of each terminal It can be distributed by control plane network element, can also be distributed by other equipment and notify to give control plane network element.For example, working as control plane network element For SGW-C when, the corresponding largest buffered amount of each terminal can be distributed by MME and be notified to SGW-C.For target terminal distribution Largest buffered amount refers to the maximum quantity with the relevant data of target terminal that control plane network element can cache.It is each different whole The largest buffered amount of end distribution may be the same or different, and the embodiment of the present invention is not construed as limiting this.Optionally, maximum slow Storage is down buffer storage suggested quantity (downlink buffering suggested count).By taking target terminal as an example, when Cached in control plane network element when having reached the largest buffered amount distributed for target terminal with the relevant data of target terminal, control Veil member processed can not continue storage and the relevant data of target terminal.Due to only having between control plane network element and user plane network element One user plane tunnel, therefore pass through this user plane tunnel transmission with the relevant data of each terminal.If only portion The data that point terminal has cached in control plane network element have reached corresponding largest buffered amount, then this user plane tunnel It cannot be deleted, for transmitting and other relevant data of terminal for being also not up to largest buffered amount.When all terminals are being controlled When the data cached in veil member processed have reached corresponding largest buffered amount, this user plane tunnel is deleted in triggering Road.
In an example it is assumed that only having a user plane tunnel, control plane between control plane network element and user plane network element All terminals of network element and user plane network element common service include terminal 1, terminal 2 and terminal 3.It is assumed to be each terminal distribution Largest buffered amount is a, and largest buffered amount a is had reached with the relevant data of each terminal when having been cached in control plane network element When, control plane network element, which determines, deletes this user plane tunnel, and control plane network element sends solicited message, user to user plane network element Veil member deletes this user plane tunnel after receiving the solicited message.
Illustratively, for the situation in the deletion user plane tunnel in data buffer storage scene, the control plane network element being related to is SGW-C and user plane network element are SGW-U, or the control plane network element being related to is SGW/PGW-C and user plane network element is SGW/ PGW-U, or the control plane network element that is related to is NG-CP and user plane network element is NG-UP.
(c) what is cached in control plane network element is all sent to user plane with the relevant data of each terminal in all terminals Network element.
In which case, user plane tunnel can be deleted in data forwarding scene.
By the agency of above, when target terminal is in Idle state, user plane network element is receiving and target terminal phase After the data of pass, control veil will be given with the relevant data forwarding of target terminal by above-mentioned have user plane tunnel Member caches these data by control plane network element.Subsequently, when target terminal restores from Idle state to connected state, control plane network element Caching and the relevant data of target terminal are sent to user plane network element by this user plane tunnel, by user plane network element These data are sent to target terminal.
It is relevant with each terminal due to only having a user plane tunnel between control plane network element and user plane network element Data pass through this user plane tunnel transmission.If the data that only part terminal caches in control plane network element are whole It is sent to user plane network element, then this user plane tunnel cannot be deleted, and be cached in control plane network element for transmission Data be not sent to the relevant data of other terminals of user plane network element all also.When all terminals are delayed in control plane network element When the data deposited all have been sent to user plane network element, this user plane tunnel is deleted in triggering.
In an example it is assumed that only having a user plane tunnel, control plane between control plane network element and user plane network element All terminals of network element and user plane network element common service include terminal 1, terminal 2 and terminal 3.When what is cached in control plane network element When being all sent to user plane network element with the relevant data of each terminal, control plane network element, which determines, deletes this user plane tunnel Road, control plane network element send solicited message to user plane network element, and user plane network element deletes this after receiving the solicited message User plane tunnel.
Illustratively, for the situation in the deletion user plane tunnel in data forwarding scene, the control plane network element being related to is SGW-C and user plane network element are SGW-U, or the control plane network element being related to is SGW/PGW-C and user plane network element is SGW/ PGW-U, or the control plane network element that is related to is NG-CP and user plane network element is NG-UP.
(d) control plane network element receives the instruction of legal interception system, the instruction be used to indicate no longer need monitor with it is above-mentioned The relevant data of any terminal in all terminals.
In which case, user plane tunnel can be deleted in Lawful Interception scene.
In Lawful Interception scene, if legal interception system needs monitoring related (by taking target terminal as an example) to any terminal Data, then user plane network element receiving with after the relevant data of target terminal, pass through above-mentioned have a target use Family face tunnel will be sent to control plane network element with the relevant data of target terminal, by control plane network element by these data forwardings to conjunction Method monitoring system.The data that user plane network element is sent to control plane network element can be the data copy that user plane network element generates, also May include other data type informations.The data that control plane network element is transmitted to legal interception system can be control plane network element into Row treated data or other information.
If legal interception system no longer need to monitor with the relevant data of target terminal, legal interception system can be to Control plane network element sends Lawful Interception and deactivates message, which deactivates message and be used to indicate deactivation and target terminal Relevant Lawful Interception function, subsequent user veil member need not will be sent to control plane network element again with the relevant data of target terminal It is transmitted to legal interception system.Due to only having a user plane tunnel between control plane network element and user plane network element, if legal There is still a need for monitorings and the relevant data of at least one terminal, then this user plane tunnel to be deleted for monitoring system, with It is used for transmission and the relevant data of these terminals.When legal interception system no longer needs to monitor and the relevant data of any terminal When, this user plane tunnel is deleted in triggering.
In an example it is assumed that only having a user plane tunnel, control plane between control plane network element and user plane network element All terminals of network element and user plane network element common service include terminal 1, terminal 2 and terminal 3.When legal interception system no longer needs When monitoring data relevant with any terminal, control plane network element determine delete this user plane tunnel, control plane network element to User plane network element sends solicited message, and user plane network element deletes this user plane tunnel after receiving the solicited message.
Illustratively, for the situation in the deletion user plane tunnel in Lawful Interception scene, the control plane network element being related to is SGW-C and user plane network element are SGW-U, the control plane network element being either related to be PGW-C and user plane network element be PGW-U or The control plane network element being related to is SGW/PGW-C and user plane network element is SGW/PGW-U, or the control plane network element being related to is NG- CP and user plane network element are NG-UP.
Above in relation to the different grain size corresponding to user plane tunnel, explanation is described to preset condition.Also, respectively From 4 different application scenarios such as session deletion, data buffer storage, data forwarding and Lawful Interception, it is situated between to preset condition Continue explanation.For data buffer storage scene, above only by taking the distribution of largest buffered amount counterpart terminal as an example.In other possible embodiment party In formula, largest buffered amount can also correspond to user plane tunnel distributing.That is, configuring promising each user plane tunnel in control plane network element The largest buffered amount of distribution.The corresponding largest buffered amount in each user plane tunnel can be distributed by control plane network element, can also be by Other equipment distributes and notifies to give control plane network element.For example, when control plane network element is SGW-C, each user plane tunnel corresponds to Largest buffered amount can be distributed and be notified to SGW-C by MME.Largest buffered amount for target user face tunnel distributing is to accuse The maximum quantity for the data received from user plane network element by target user face tunnel that veil member processed can cache.Work as user plane It when tunnel is a plurality of, may be the same or different for the largest buffered amount of each different user face tunnel distributing, the present invention is real Example is applied to be not construed as limiting this.In this case, preset condition is：It is transmitted to from user plane network element by target user face tunnel The data of control plane network element have reached as the largest buffered amount of target user face tunnel distributing.When what is cached in control plane network element By the data of target user face tunnel transmission have reached for the largest buffered amount of target user face tunnel distributing when, control veil Member can not continue the data that storage is received by target user face tunnel, and user plane network element can be used without going through target at this time Family face tunnel forwards the data to control plane network element and is cached, and target user face tunnel can be deleted.
In an example it is assumed that having 3 user plane tunnels between control plane network element and user plane network element, respectively use Family face tunnel 1, user plane tunnel 2 and user plane tunnel 3.The largest buffered amount for being assumed to be each user plane tunnel distributing is a, By taking user plane tunnel 1 as an example, when the data for being transmitted to control plane network element from user plane network element by user plane tunnel 1 have reached most When big buffer memory a, control plane network element, which determines, deletes user plane tunnel 1, and control plane network element carries useful to the transmission of user plane network element The solicited message of the mark in family face tunnel 1, user plane network element delete user plane tunnel 1 after receiving the solicited message.
In addition, in the case where largest buffered amount corresponds to user plane tunnel distributing, the granularity corresponding to user plane tunnel can To be that equipment granularity, terminal granularity, session granularity or carrying granularity, the embodiment of the present invention are not construed as limiting this.
In the alternative embodiment provided based on embodiment illustrated in fig. 2, as shown in figure 3, control plane network element is to user Before or after veil member sends solicited message, namely before or after 202 part, the method can also include as follows Part：
In 204 parts, the determination of control plane network element needs to create new user plane tunnel.
Specifically, control plane network element can detect that determination needs to create new user plane tunnel when meeting establishment condition Road.For corresponding to user plane tunnel different grain size and different application scenarios, above-mentioned establishment condition can be different.It is right below Explanation is introduced in establishment condition.
1, user plane tunnel counterpart terminal granularity
When user plane tunnel counterpart terminal granularity, each user plane tunnel is used for transmission and a relevant number of terminal According to.The new user plane tunnel that request creates is used for transmission and the relevant data of service terminal.Service terminal is control plane network element With a terminal of user plane network element common service, and user plane corresponding with this terminal tunnel is not temporarily created.Establishment condition It may include one of following situation：(a) it needs to create with the relevant session of service terminal；(b) service terminal restores from Idle state To connected state, control plane network element needs will have been cached is sent to user plane network element with the relevant data of service terminal, by user Veil member sends these data to service terminal；(c) service terminal is converted to Idle state from connected state, and control plane network element needs It receives and caches and the relevant data of service terminal from user plane network element；(d) control plane network element receives legal interception system Instruction needs to monitor and the relevant data of service terminal.
2, user plane tunnel respective session granularity
When user plane tunnel respective session granularity, each user plane tunnel is used for transmission and a relevant number of session According to.Request create new user plane tunnel be used for transmission with the relevant data of new session, new session refers to not creating temporarily Session.Establishment condition may include one of following situation：(a) new session needs to create；(b) new session includes for passing Defeated at least one session with the relevant data of service terminal, and service terminal restores from Idle state to connected state, controls veil Member needs to have cached to be sent to user plane network element with the relevant data of service terminal, is sent out these data by user plane network element Give service terminal；(c) new session includes at least one session being used for transmission with the relevant data of service terminal, and is serviced Terminal is converted to Idle state from connected state, and control plane network element needs are received from user plane network element and cached relevant with service terminal Data；(d) new session includes at least one session being used for transmission with the relevant data of service terminal, and control plane network element connects The instruction for receiving legal interception system needs to monitor and the relevant data of service terminal.
For above-mentioned (b), (c), (d) situation, service terminal is the one of control plane network element and user plane network element common service A terminal.
3, user plane tunnel corresponds to carrying granularity
When user plane tunnel corresponds to carrying granularity, each user plane tunnel is used for transmission and a relevant number of carrying According to.Request create new user plane tunnel be used for transmission with the relevant data of new carrying, new carrying refers to not creating temporarily Carrying.Establishment condition may include one of following situation：(a) new carrying includes being used for transmission and the relevant number of new session According at least one carrying, and new session needs to create, and new session refers to the session not created temporarily；(b) new carrying packet At least one carrying being used for transmission with the relevant data of service terminal is included, and service terminal restores from Idle state to connected state, Control plane network element needs will cache and be sent to user plane network element with the relevant data of service terminal, by user plane network element by this A little data are sent to service terminal；(c) new carrying includes being used for transmission to hold at least one of the relevant data of service terminal It carries, and service terminal is converted to Idle state from connected state, control plane network element needs receive from user plane network element and cache and service The relevant data of terminal；(d) new carrying includes at least one carrying being used for transmission with the relevant data of service terminal, and is controlled The instruction that veil member processed receives legal interception system needs to monitor and the relevant data of service terminal.
For above-mentioned (b), (c), (d) situation, service terminal is the one of control plane network element and user plane network element common service A terminal.
4, user plane tunnel corresponds to equipment granularity
When user plane tunnel corresponds to equipment granularity, due between control plane network element and user plane network element only have one with Family face tunnel, so the new user plane tunnel that request creates is this user plane tunnel.It uses in this user plane tunnel In the relevant data of all terminals of transmission and control plane network element and user plane network element common service.Establishment condition may include as One of lower situation：(a) it needs to create by the session of this user plane tunnel transmission, which can be above-mentioned all terminals In any terminal need the session that creates；(b) any terminal in above-mentioned all terminals is restored from Idle state to connected state, control Veil member needs processed will have been cached is sent to user plane network element with the relevant data of the terminal, is counted these by user plane network element According to being sent to the terminal；(c) any terminal in above-mentioned all terminals is converted to Idle state from connected state, and control plane network element needs It receives and caches and the relevant data of the terminal from user plane network element；(d) control plane network element receives the finger of legal interception system Show and needs to monitor and the relevant data of any terminal in above-mentioned all terminals.
In 205 parts, control plane network element sends request to create to user plane network element, and request to create is used to indicate user's veil Member creates new user plane tunnel.
Correspondingly, user plane network element receives request to create from control plane network element.
In one example, it can be carried in request to create at least one of following：It is used to indicate and creates user plane tunnel Indicate information, the identifying of new user plane tunnel, the corresponding message forward rule in new user plane tunnel or new user plane tunnel The corresponding message matching rule in road.
In a kind of possible embodiment, the mark in the new user plane tunnel that request creates is carried in request to create Know, with the new user plane tunnel for notifying user plane network element to need to create.For example, the granularity corresponding to user plane tunnel is eventually When telomere degree, session granularity or carrying granularity, since a plurality of user plane can be established between control plane network element and user plane network element Tunnel, therefore in request to create in addition to carrying above-mentioned instruction information, it is also necessary to identify what request created in request to create New user plane tunnel.In another example when the granularity corresponding to the user plane tunnel is equipment granularity, due to control plane network element and use Only have a user plane tunnel between the veil member of family, therefore only carry above-mentioned instruction information in request to create, it may not be necessary to The mark in this user plane tunnel is carried in request to create.
In a kind of possible embodiment, it is corresponding that the new user plane tunnel that request creates is carried in solicited message Message forward rule and/or message matching rule, to which user plane network element can configure the new user plane tunnel of establishment accordingly Corresponding message forward rule and/or message matching rule and other contextual informations.
In 206 parts, user plane network element creates new user plane tunnel according to request to create.
Specifically, user plane network element can determine the new user plane tunnel for needing to create after receiving request to create Then road creates the new user plane tunnel.For example, user plane network element create new user plane tunnel can be in the following manner It realizes：It is the new corresponding contextual information of user plane tunnel configuration, etc. for new user plane tunnel distributing resource.
In one example, user plane network element can be sent after creating new user plane tunnel to control plane network element Response is created, establishment response, which is used to indicate, has successfully created new user plane tunnel.Correspondingly, control plane network element is from user plane Network element receives after establishment response, you can confirms that new user plane tunnel has created.
It is rung in addition, request to create can be received and dispatched between control plane network element and user plane network element by control plane tunnel and created It answers.
From the foregoing, it can be understood that the embodiment of the present invention additionally provides the user plane created between control plane network element and user plane network element The technical solution in tunnel so that user plane tunnel can be created when there is demand.
Below shown in Fig. 2 and Fig. 3 on the basis of method, in conjunction with Fig. 4~Fig. 6, to the scheme of the embodiment of the present invention do into One step explanation.Wherein, it in method shown in Fig. 4~Fig. 6, with the same or analogous content of method shown in Fig. 2 or Fig. 3, can refer to Detailed description in Fig. 2 or Fig. 3, does not repeat subsequently.
Fig. 4 is the communication scheme of another method for deleting user plane tunnel provided in an embodiment of the present invention.In Fig. 4, With user plane tunnel counterpart terminal granularity, illustrated so that application scenarios are data buffer storage scene as an example.This method may include Such as lower part.
In 401 parts, when target terminal is in Idle state, user plane network element is used by target corresponding with target terminal Family face tunnel is sent and the relevant data of target terminal to control plane network element.
In 402 parts, control plane network element caching and the relevant data of target terminal.
In 403 parts, control plane network element determines whether what is cached has reached with the relevant data of target terminal as target The largest buffered amount of terminal distribution.
In 404 parts, if cached that the maximum distributed for target terminal is had reached with the relevant data of target terminal is slow Storage, then control plane network element send solicited message to user plane network element, solicited message is used to indicate user plane network element delete target User plane tunnel carries the mark in target user face tunnel in the solicited message.
In 405 parts, user plane network element is according to solicited message, delete target user plane tunnel.
In 406 parts, user plane network element sends response message to control plane network element.
In 407 parts, when target terminal restores from Idle state to connected state, control plane network element, which determines, to be needed to create newly User plane tunnel, the new user plane tunnel to the transmission of user plane network element for having cached and the relevant data of target terminal.
In 408 parts, control plane network element sends request to create to user plane network element, and request to create is used to indicate user's veil Member creates new user plane tunnel.
In 409 parts, user plane network element creates new user plane tunnel according to request to create.
In 410 parts, user plane network element sends to control plane network element and creates response.
Later, control plane network element can send cached and target by the new user plane tunnel to user plane network element The relevant data of terminal.
In 411 parts, control plane network element sends session termination request to user plane network element, and session termination request is used to indicate User plane network element is deleted and the relevant session of target terminal.
In 412 parts, user plane network element is deleted and the relevant session of target terminal, and deletes and the relevant use of target terminal Family face tunnel.
In 413 parts, user plane network element sends session termination response to control plane network element.
Fig. 5 is the communication scheme of the method in another deletion user plane tunnel provided in an embodiment of the present invention.In Fig. 5, With user plane tunnel counterpart terminal granularity, illustrated so that application scenarios are data forwarding scene as an example.This method may include Such as lower part.
In 501 parts, when target terminal restores from Idle state to connected state, control plane network element by with target terminal pair The target user face tunnel answered to user plane network element send cached with the relevant data of target terminal.
In 502 parts, control plane network element determines whether what is cached is all sent to use with the relevant data of target terminal Family veil member.
In 503 parts, if control plane network element caching is all sent to user's veil with the relevant data of target terminal Member, then control plane network element to user plane network element send solicited message, solicited message be used to indicate user plane network element delete target use Family face tunnel carries the mark in target user face tunnel in the solicited message.
In 504 parts, user plane network element is according to solicited message, delete target user plane tunnel.
In 505 parts, user plane network element sends response message to control plane network element.
In 506 parts, when target terminal is converted to Idle state from connected state, control plane network element, which determines, to be needed to create newly User plane tunnel, which is used to receive from user plane network element and the relevant data of target terminal, in order to incite somebody to action With the relevant data buffer storage of target terminal in control plane network element.
In 507 parts, control plane network element sends request to create to user plane network element, and request to create is used to indicate user's veil Member creates new user plane tunnel.
In 508 parts, user plane network element creates new user plane tunnel according to request to create.
In 509 parts, user plane network element sends to control plane network element and creates response.
Later, user plane network element can be related to target terminal to the transmission of control plane network element by the new user plane tunnel Data, control plane network element receives and caches and the relevant data of target terminal.
In 510 parts, control plane network element sends session termination request to user plane network element, and session termination request is used to indicate User plane network element is deleted and the relevant session of target terminal.
In 511 parts, user plane network element is deleted and the relevant session of target terminal, and deletes and the relevant use of target terminal Family face tunnel.
In 512 parts, user plane network element sends session termination response to control plane network element.
Fig. 6 is the communication scheme of another method for deleting user plane tunnel provided in an embodiment of the present invention.In Fig. 6, With user plane tunnel counterpart terminal granularity, illustrated so that application scenarios are Lawful Interception scene as an example.This method may include Such as lower part.
In 601 parts, in the case where the corresponding Lawful Interception function of target terminal is active, user plane network element It is sent and the relevant data of target terminal to control plane network element by target user corresponding with target terminal face tunnel.
In 602 parts, control plane network element forwards and the relevant data of target terminal to legal interception system.
In 603 parts, control plane network element receives Lawful Interception from legal interception system and deactivates message, which goes Activate message is used to indicate deactivation and the relevant Lawful Interception function of target terminal.
In 604 parts, control plane network element sends solicited message to user plane network element, and solicited message is used to indicate user's veil First delete target user plane tunnel carries the mark in target user face tunnel in the solicited message.
In 605 parts, user plane network element is according to solicited message, delete target user plane tunnel.
In 606 parts, user plane network element sends response message to control plane network element.
In 607 parts, control plane network element receives Lawful Interception activate message, Lawful Interception activation from legal interception system Message is used to indicate activation and the relevant Lawful Interception function of target terminal.
In 608 parts, control plane network element sends request to create to user plane network element, and request to create is used to indicate user's veil Member creates new user plane tunnel, which is used to receive and the relevant number of target terminal from user plane network element According to.
In 609 parts, user plane network element creates new user plane tunnel according to request to create.
In 610 parts, user plane network element sends to control plane network element and creates response.
Later, user plane network element can be related to target terminal to the transmission of control plane network element by the new user plane tunnel Data, control plane network element receive simultaneously to legal interception system forwarding with the relevant data of target terminal.
In 611 parts, control plane network element sends session termination request to user plane network element, and session termination request is used to indicate User plane network element is deleted and the relevant session of target terminal.
In 612 parts, user plane network element is deleted and the relevant session of target terminal, and deletes and the relevant use of target terminal Family face tunnel.
In 613 parts, user plane network element sends session termination response to control plane network element.
The above-mentioned angle mainly interacted from control plane network element and user plane network element to scheme provided in an embodiment of the present invention into Introduction is gone.It is understood that control plane network element, user plane network element are in order to realize above-mentioned function, it is each it comprises executing The corresponding hardware configuration of function and/or software module.In conjunction with disclosed in this invention embodiment describe each exemplary unit And algorithm steps, the embodiment of the present invention can be realized with the combining form of hardware or hardware and computer software.Some function It executes in a manner of hardware or computer software driving hardware actually, depend on the specific application of technical solution and designs about Beam condition.Those skilled in the art can realize described function to each specific application using different methods, But this realization is it is not considered that exceed the range of the technical solution of the embodiment of the present invention.
The embodiment of the present invention can carry out functional unit according to above method example to control plane network element or user plane network element Division two or more functions can also be integrated for example, can correspond to each function divides each functional unit In a processing unit.The form that hardware had both may be used in above-mentioned integrated unit is realized, software function list can also be used The form of member is realized.It should be noted that being schematical, only a kind of logic to the division of unit in the embodiment of the present invention Function divides, formula that in actual implementation, there may be another division manner.
Using integrated unit, Fig. 7 A show the one of control plane network element involved in above-described embodiment The possible structural schematic diagram of kind.Control plane network element 700 includes：Processing unit 702 and communication unit 703.Processing unit 702 is used for Control management is carried out to the action of control plane network element, for example, processing unit 702 is for supporting control plane network element to execute in Fig. 2 Process 201 and 202, the process 204 and 205 in Fig. 3, the process 402~404,407,408 and 411 in Fig. 4, the process in Fig. 5 Process 602~604,607,608 and 611 in 501~503,506,507 and 510, Fig. 6, and/or for described herein Other processes of technology.Communication unit 703 is used to support the communication of control plane network element and user plane network element or other network entities. Control plane network element 700 can also include storage unit 701, the program code for storing control plane network element 700 and data.
Wherein, processing unit 702 can be processor or controller, such as can be 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 It is (Field Programmable Gate Array, FPGA) or other programmable logic device, transistor logic, hard Part component or its arbitrary combination.It may be implemented or executes illustratively patrols in conjunction with various described in the disclosure of invention Collect box, module and circuit.The processor can also be to realize the combination of computing function, such as include one or more micro- places Manage device combination, the combination etc. of DSP and microprocessor.Communication unit 703 can be communication interface, transceiver, transmission circuit etc., Wherein, communication interface is to be referred to as, and may include connecing between one or more interfaces, such as control plane network element and user plane network element Mouthful.Storage unit 701 can be memory.
When processing unit 702 is processor, communication unit 703 is communication interface, when storage unit 701 is memory, this Control plane network element involved by inventive embodiments can be control plane network element shown in Fig. 7 B.
Shown in Fig. 7 B, which includes：Processor 712, communication interface 713, memory 711.It is optional , control plane network element 710 can also include bus 714.Wherein, communication interface 713, processor 712 and memory 711 can be with It is connected with each other by bus 714；Bus 714 can be Peripheral Component Interconnect standard (Peripheral Component Interconnect, abbreviation PCI) bus or expanding the industrial standard structure (Extended Industry Standard Architecture, abbreviation EISA) bus etc..The bus 714 can be divided into address bus, data/address bus, controlling bus etc.. For ease of indicating, only indicated with a thick line in Fig. 7 B, it is not intended that an only bus or a type of bus.
Control plane network element shown in above-mentioned Fig. 7 A or Fig. 7 B can be SGW-C, PGW-C, TDF-C, SGW/PGW-C or NG- CP。
Using integrated unit, Fig. 8 A show the one of user plane network element involved in above-described embodiment The possible structural schematic diagram of kind.User plane network element 800 includes：Processing unit 802 and communication unit 803.Processing unit 802 is used for Control management is carried out to the action of user plane network element, for example, processing unit 802 is for supporting user plane network element to execute in Fig. 2 Process 203, the process 206 in Fig. 3, the process 401,405,406,409,410,412 and 413 in Fig. 4, the process in Fig. 5 504, the process 601,605,606,609,610,612 and 613 in 505,508,509,511 and 512, Fig. 6, and/or for this Other processes of technology described in text.Communication unit 803 is for supporting user plane network element and control plane network element or other networks The communication of entity.User plane network element 800 can also include storage unit 801, the program code for storing user plane network element 800 And data.
Wherein, processing unit 802 can be processor or controller, such as can be CPU, general processor, DSP, ASIC, FPGA either other programmable logic device, transistor logic, hardware component or its arbitrary combination.It can be with It realizes or executes and combine various illustrative logic blocks, module and circuit described in the disclosure of invention.The processing Device can also be to realize the combination of computing function, such as combined comprising one or more microprocessors, the group of DSP and microprocessor Close etc..Communication unit 803 can be communication interface, transceiver, transmission circuit etc., wherein communication interface is to be referred to as, and can be wrapped Include the interface between one or more interfaces, such as user plane network element and control plane network element.Storage unit 801 can be storage Device.
When processing unit 802 is processor, communication unit 803 is communication interface, when storage unit 801 is memory, this User plane network element involved by inventive embodiments can be user plane network element shown in Fig. 8 B.
Shown in Fig. 8 B, which includes：Processor 812, communication interface 813, memory 811.It is optional , user plane network element 810 can also include bus 814.Wherein, communication interface 813, processor 812 and memory 811 can be with It is connected with each other by bus 814；Bus 814 can be pci bus or eisa bus etc..The bus 814 can be divided into address Bus, data/address bus, controlling bus etc..For ease of indicating, only indicated with a thick line in Fig. 8 B, it is not intended that only one Bus or a type of bus.
User plane network element shown in above-mentioned Fig. 8 A or Fig. 8 B can be SGW-U, PGW-U, TDF-U, SGW/PGW-U or NG- UP。
The step of method in conjunction with described in disclosure of the embodiment of the present invention or algorithm, can be come real in a manner of hardware It is existing, can also be that the mode of software instruction is executed by processor to realize.Software instruction can be made of corresponding software module, Software module can be stored on random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read Only Memory, ROM), Erasable Programmable Read Only Memory EPROM (Erasable Programmable ROM, EPROM), Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM), register, hard disk, movement are hard In the storage medium of disk, CD-ROM (CD-ROM) or any other form well known in the art.A kind of illustrative storage Medium couples are to processor, to enable a processor to from the read information, and can be written and believe to the storage medium Breath.Certainly, storage medium can also be the component part of processor.Pocessor and storage media can be located in ASIC.In addition, The ASIC can be located in control plane network element or user plane network element.Certainly, pocessor and storage media can also be used as discrete sets Part is present in control plane network element or user plane network element.
Those skilled in the art it will be appreciated that in said one or multiple examples, retouched by the embodiment of the present invention The function of stating can be realized with hardware, software, firmware or their arbitrary combination.It when implemented in software, can be by this A little functions storages in computer-readable medium or as on computer-readable medium one or more instructions or code into Row transmission.Computer-readable medium includes computer storage media and communication media, and wherein communication media includes convenient for from one Any medium of computer program is transmitted to another place in place.Storage medium, which can be general or specialized computer, to be deposited Any usable medium taken.
Above-described specific implementation mode carries out the purpose, technical solution and advantageous effect of the embodiment of the present invention It is further described, it should be understood that the foregoing is merely the specific implementation modes of the embodiment of the present invention, and does not have to In limit the embodiment of the present invention protection domain, it is all on the basis of the technical solution of the embodiment of the present invention, done it is any Modification, equivalent replacement, improvement etc. should all be included within the protection domain of the embodiment of the present invention.

Claims (29)

1. a kind of method for deleting user plane tunnel, is applied in communication system, the communication system include control plane network element and User plane network element has at least one user plane tunnel, the method between the control plane network element and the user plane network element Including：
The control plane network element determines the target user face tunnel for existing at least one user plane tunnel and meeting preset condition Road；
The control plane network element sends solicited message to the user plane network element, and the solicited message is used to indicate the user plane Network element deletes target user face tunnel.
2. according to the method described in claim 1, it is characterized in that, each user at least one user plane tunnel Face tunnel be used for transmission with the relevant data of terminal, target user face tunnel is used for transmission relevant with target terminal Data, the preset condition include one of following situation：
It needs to delete with the relevant whole sessions of the target terminal；
Being had reached with the relevant data of the target terminal for having been cached in the control plane network element distributes for the target terminal Largest buffered amount；
What is cached in the control plane network element has all been sent to the user plane network element with the relevant data of the target terminal；
The control plane network element receives the instruction of legal interception system, and the instruction, which is used to indicate, no longer to need to monitor and the mesh Mark the relevant data of terminal.
3. according to the method described in claim 1, it is characterized in that, each user at least one user plane tunnel Face tunnel be used for transmission with the relevant data of session, target user face tunnel is used for transmission relevant with target session Data, the preset condition include one of following situation：
The target session needs to delete；
The target session includes at least one session being used for transmission with the relevant data of target terminal, and the control veil What is cached in member has reached the largest buffered amount distributed for the target terminal with the relevant data of the target terminal；
The target session includes at least one session being used for transmission with the relevant data of target terminal, and the control veil What is cached in member has all been sent to the user plane network element with the relevant data of the target terminal；
The target session includes at least one session being used for transmission with the relevant data of target terminal, and the control veil Member receives the instruction of legal interception system, and the instruction, which is used to indicate, no longer to need to monitor and the relevant number of the target terminal According to.
4. according to the method described in claim 1, it is characterized in that, each user at least one user plane tunnel Face tunnel is used for transmission carries relevant data with one, and target user face tunnel is used for transmission relevant with target carrying Data, the preset condition include one of following situation：
The target carrying is at least one carrying being used for transmission with the relevant data of target session, and the target session needs It deletes；
Target carrying is at least one carrying being used for transmission with the relevant data of target terminal, and the control plane network element In cached have reached the largest buffered amount distributed for the target terminal with the relevant data of the target terminal；
Target carrying is at least one carrying being used for transmission with the relevant data of target terminal, and the control plane network element Middle caching has all been sent to the user plane network element with the relevant data of the target terminal；
Target carrying is at least one carrying being used for transmission with the relevant data of target terminal, and the control plane network element The instruction of legal interception system is received, the instruction, which is used to indicate, no longer to need to monitor and the relevant data of the target terminal.
5. according to the method described in claim 1, it is characterized in that, at least one user plane tunnel includes a user plane Tunnel, target user face tunnel be a user plane tunnel, target user face tunnel be used for transmission with it is described The relevant data of all terminals of control plane network element and the user plane network element common service, the preset condition include following feelings One of shape：
It needs to delete by whole sessions of a user plane tunnel transmission；
Cached in the control plane network element with each relevant data of terminal have reached in all terminals is described The largest buffered amount of each terminal distribution；
All being sent to each relevant data of terminal in all terminals for being cached in the control plane network element is described User plane network element；
The control plane network element receives the instruction of legal interception system, and the instruction, which is used to indicate, no longer to need to monitor and the institute There are the relevant data of any terminal in terminal.
6. according to the method described in claim 1, it is characterized in that, the preset condition is：Pass through target user face tunnel The data that road is transmitted to the control plane network element from the user plane network element have reached as target user face tunnel distributing Largest buffered amount.
7. method according to any one of claims 1 to 6, which is characterized in that the control plane network element is to the user plane Before or after network element sends solicited message, the method further includes：
The control plane network element determination needs to create new user plane tunnel；
The control plane network element sends request to create to the user plane network element, and the request to create is used to indicate the user plane Network element creates the new user plane tunnel.
8. a kind of method for deleting user plane tunnel, is applied in communication system, the communication system include control plane network element and User plane network element has at least one user plane tunnel, the method between the control plane network element and the user plane network element Including：
The user plane network element receives solicited message from the control plane network element, and the solicited message is used to indicate the user plane Network element deletes the target user face tunnel for meeting preset condition at least one user plane tunnel；
The user plane network element deletes target user face tunnel according to the solicited message.
9. according to the method described in claim 8, it is characterized in that, each user at least one user plane tunnel Face tunnel be used for transmission with the relevant data of terminal, target user face tunnel is used for transmission relevant with target terminal Data, the preset condition include one of following situation：
It needs to delete with the relevant whole sessions of the target terminal；
Being had reached with the relevant data of the target terminal for having been cached in the control plane network element distributes for the target terminal Largest buffered amount；
What is cached in the control plane network element has all been sent to the user plane network element with the relevant data of the target terminal；
The control plane network element receives the instruction of legal interception system, and the instruction, which is used to indicate, no longer to need to monitor and the mesh Mark the relevant data of terminal.
10. according to the method described in claim 8, it is characterized in that, each at least one user plane tunnel is used Family face tunnel be used for transmission with the relevant data of session, target user face tunnel is used for transmission related to target session Data, the preset condition includes one of following situation：
The target session needs to delete；
The target session includes at least one session being used for transmission with the relevant data of target terminal, and the control veil What is cached in member has reached the largest buffered amount distributed for the target terminal with the relevant data of the target terminal；
The target session includes at least one session being used for transmission with the relevant data of target terminal, and the control veil What is cached in member has all been sent to the user plane network element with the relevant data of the target terminal；
The target session includes at least one session being used for transmission with the relevant data of target terminal, and the control veil Member receives the instruction of legal interception system, and the instruction, which is used to indicate, no longer to need to monitor and the relevant number of the target terminal According to.
11. according to the method described in claim 8, it is characterized in that, each at least one user plane tunnel is used Family face tunnel is used for transmission carries relevant data with one, and target user face tunnel is used for transmission related to target carrying Data, the preset condition includes one of following situation：
The target carrying is at least one carrying being used for transmission with the relevant data of target session, and the target session needs It deletes；
Target carrying is at least one carrying being used for transmission with the relevant data of target terminal, and the control plane network element In cached have reached the largest buffered amount distributed for the target terminal with the relevant data of the target terminal；
Target carrying is at least one carrying being used for transmission with the relevant data of target terminal, and the control plane network element Middle caching has all been sent to the user plane network element with the relevant data of the target terminal；
Target carrying is at least one carrying being used for transmission with the relevant data of target terminal, and the control plane network element The instruction of legal interception system is received, the instruction, which is used to indicate, no longer to need to monitor and the relevant data of the target terminal.
12. according to the method described in claim 8, it is characterized in that, at least one user plane tunnel includes a user Face tunnel, target user face tunnel are a user plane tunnel, and target user face tunnel is used for transmission and institute The relevant data of all terminals of control plane network element and the user plane network element common service are stated, the preset condition includes as follows One of situation：
It needs to delete by whole sessions of a user plane tunnel transmission；
Cached in the control plane network element with each relevant data of terminal have reached in all terminals is described The largest buffered amount of each terminal distribution；
All being sent to each relevant data of terminal in all terminals for being cached in the control plane network element is described User plane network element；
The control plane network element receives the instruction of legal interception system, and the instruction, which is used to indicate, no longer to need to monitor and the institute There are the relevant data of any terminal in terminal.
13. according to the method described in claim 8, it is characterized in that, the preset condition is：Pass through target user face tunnel The data that road is transmitted to the control plane network element from the user plane network element have reached as target user face tunnel distributing Largest buffered amount.
14. according to claim 8 to 13 any one of them method, which is characterized in that the user plane network element is from the control Before or after veil member receives solicited message, the method further includes：
The user plane network element receives request to create from the control plane network element, and the request to create is used to indicate the user plane Network element creates new user plane tunnel；
The user plane network element creates the new user plane tunnel according to the request to create.
15. a kind of control plane network element is applied in communication system, the communication system includes the control plane network element and user plane Network element has at least one user plane tunnel, the control plane network element between the control plane network element and the user plane network element Including：Processing unit and communication unit；
The processing unit is used to determine the target user face for existing at least one user plane tunnel and meeting preset condition Tunnel；And for sending solicited message to the user plane network element by the communication unit, the solicited message is for referring to Show that the user plane network element deletes target user face tunnel.
16. control plane network element according to claim 15, which is characterized in that every at least one user plane tunnel One user plane tunnel is used for transmission to be used for transmission and target end with the relevant data of terminal, target user face tunnel It includes one of following situation to hold relevant data, the preset condition：
It needs to delete with the relevant whole sessions of the target terminal；
Being had reached with the relevant data of the target terminal for having been cached in the control plane network element distributes for the target terminal Largest buffered amount；
What is cached in the control plane network element has all been sent to the user plane network element with the relevant data of the target terminal；
The control plane network element receives the instruction of legal interception system, and the instruction, which is used to indicate, no longer to need to monitor and the mesh Mark the relevant data of terminal.
17. control plane network element according to claim 15, which is characterized in that every at least one user plane tunnel One user plane tunnel be used for transmission with the relevant data of session, target user face tunnel is used for transmission and target meeting Relevant data are talked about, the preset condition includes one of following situation：
The target session needs to delete；
The target session includes at least one session being used for transmission with the relevant data of target terminal, and the control veil What is cached in member has reached the largest buffered amount distributed for the target terminal with the relevant data of the target terminal；
The target session includes at least one session being used for transmission with the relevant data of target terminal, and the control veil What is cached in member has all been sent to the user plane network element with the relevant data of the target terminal；
The target session includes at least one session being used for transmission with the relevant data of target terminal, and the control veil Member receives the instruction of legal interception system, and the instruction, which is used to indicate, no longer to need to monitor and the relevant number of the target terminal According to.
18. control plane network element according to claim 15, which is characterized in that every at least one user plane tunnel One user plane tunnel is used for transmission carries relevant data with one, and target user face tunnel is used for transmission to be held with target Relevant data are carried, the preset condition includes one of following situation：
The target carrying is at least one carrying being used for transmission with the relevant data of target session, and the target session needs It deletes；
Target carrying is at least one carrying being used for transmission with the relevant data of target terminal, and the control plane network element In cached have reached the largest buffered amount distributed for the target terminal with the relevant data of the target terminal；
Target carrying is at least one carrying being used for transmission with the relevant data of target terminal, and the control plane network element Middle caching has all been sent to the user plane network element with the relevant data of the target terminal；
Target carrying is at least one carrying being used for transmission with the relevant data of target terminal, and the control plane network element The instruction of legal interception system is received, the instruction, which is used to indicate, no longer to need to monitor and the relevant data of the target terminal.
19. control plane network element according to claim 15, which is characterized in that at least one user plane tunnel includes one User plane tunnel, target user face tunnel are a user plane tunnel, and target user face tunnel is for passing The defeated relevant data of all terminals with the control plane network element and the user plane network element common service, the preset condition packet Include one of following situation：
It needs to delete by whole sessions of the user plane tunnel transmission；
Cached in the control plane network element with each relevant data of terminal have reached in all terminals is described The largest buffered amount of each terminal distribution；
All being sent to each relevant data of terminal in all terminals for being cached in the control plane network element is described User plane network element；
The control plane network element receives the instruction of legal interception system, and the instruction, which is used to indicate, no longer to need to monitor and the institute There are the relevant data of any terminal in terminal.
20. control plane network element according to claim 15, which is characterized in that the preset condition is：Pass through the target The data that user plane tunnel is transmitted to the control plane network element from the user plane network element have reached as target user face tunnel The largest buffered amount of road distribution.
21. according to claim 15 to 20 any one of them control plane network element, which is characterized in that the processing unit is additionally operable to Before or after sending solicited message to the user plane network element by the communication unit, determination needs to create new use Family face tunnel；And for sending request to create to the user plane network element by the communication unit, the request to create is used The new user plane tunnel is created in the instruction user plane network element.
22. a kind of user plane network element is applied in communication system, the communication system includes control plane network element and the user plane Network element has at least one user plane tunnel, the user plane network element between the control plane network element and the user plane network element Including：Processing unit and communication unit；
The processing unit is used to receive solicited message, the solicited message from the control plane network element by the communication unit It is used to indicate the user plane network element and deletes the target user face tunnel for meeting preset condition at least one user plane tunnel Road；And for according to the solicited message, deleting target user face tunnel.
23. user plane network element according to claim 22, which is characterized in that every at least one user plane tunnel One user plane tunnel is used for transmission to be used for transmission and target end with the relevant data of terminal, target user face tunnel It includes one of following situation to hold relevant data, the preset condition：
It needs to delete with the relevant whole sessions of the target terminal；
Being had reached with the relevant data of the target terminal for having been cached in the control plane network element distributes for the target terminal Largest buffered amount；
What is cached in the control plane network element has all been sent to the user plane network element with the relevant data of the target terminal；
The control plane network element receives the instruction of legal interception system, and the instruction, which is used to indicate, no longer to need to monitor and the mesh Mark the relevant data of terminal.
24. user plane network element according to claim 22, which is characterized in that every at least one user plane tunnel One user plane tunnel be used for transmission with the relevant data of session, target user face tunnel is used for transmission and target meeting Relevant data are talked about, the preset condition includes one of following situation：
The target session needs to delete；
The target session includes at least one session being used for transmission with the relevant data of target terminal, and the control veil What is cached in member has reached the largest buffered amount distributed for the target terminal with the relevant data of the target terminal；
The target session includes at least one session being used for transmission with the relevant data of target terminal, and the control veil What is cached in member has all been sent to the user plane network element with the relevant data of the target terminal；
The target session includes at least one session being used for transmission with the relevant data of target terminal, and the control veil Member receives the instruction of legal interception system, and the instruction, which is used to indicate, no longer to need to monitor and the relevant number of the target terminal According to.
25. user plane network element according to claim 22, which is characterized in that every at least one user plane tunnel One user plane tunnel is used for transmission carries relevant data with one, and target user face tunnel is used for transmission to be held with target Relevant data are carried, the preset condition includes one of following situation：
The target carrying is at least one carrying being used for transmission with the relevant data of target session, and the target session needs It deletes；
Target carrying is at least one carrying being used for transmission with the relevant data of target terminal, and the control plane network element In cached have reached the largest buffered amount distributed for the target terminal with the relevant data of the target terminal；
Target carrying is at least one carrying being used for transmission with the relevant data of target terminal, and the control plane network element Middle caching has all been sent to the user plane network element with the relevant data of the target terminal；
Target carrying is at least one carrying being used for transmission with the relevant data of target terminal, and the control plane network element The instruction of legal interception system is received, the instruction, which is used to indicate, no longer to need to monitor and the relevant data of the target terminal.
26. user plane network element according to claim 22, which is characterized in that at least one user plane tunnel includes one User plane tunnel, target user face tunnel are a user plane tunnel, and target user face tunnel is for passing The defeated relevant data of all terminals with the control plane network element and the user plane network element common service, the preset condition packet Include one of following situation：
It needs to delete by whole sessions of the user plane tunnel transmission；
Cached in the control plane network element with each relevant data of terminal have reached in all terminals is described The largest buffered amount of each terminal distribution；
All being sent to each relevant data of terminal in all terminals for being cached in the control plane network element is described User plane network element；
The control plane network element receives the instruction of legal interception system, and the instruction, which is used to indicate, no longer to need to monitor and the institute There are the relevant data of any terminal in terminal.
27. user plane network element according to claim 22, which is characterized in that the preset condition is：Pass through the target The data that user plane tunnel is transmitted to the control plane network element from the user plane network element have reached as target user face tunnel The largest buffered amount of road distribution.
28. according to claim 22 to 27 any one of them user plane network element, which is characterized in that the processing unit is additionally operable to By the communication unit from the control plane network element receive solicited message before or after, by the communication unit from The control plane network element receives request to create, and the request to create is used to indicate the user plane network element and creates new user plane tunnel Road；And for according to the request to create, creating the new user plane tunnel.
29. a kind of communication system, which is characterized in that the communication system includes：Such as claim 15 to 21 any one of them Control plane network element and such as claim 22 to 28 any one of them user plane network element.
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