CN106900081A

CN106900081A - The method and device of the user face data tunnel transmission of access network node granularity

Info

Publication number: CN106900081A
Application number: CN201610710608.2A
Authority: CN
Inventors: 王丹; 孙滔; 蔡慧; 陆璐
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Co Ltd
Priority date: 2016-08-23
Filing date: 2016-08-23
Publication date: 2017-06-27
Anticipated expiration: 2036-08-23
Also published as: CN106900081B

Abstract

A kind of method and device of the cellular network User face tunnel packets of access network node granularity is the embodiment of the invention provides, the method includes：Access network node judges whether the aggregating tunnel for needing to use access network node granularity for terminal；If desired for the terminal uses the aggregating tunnel of the access network node granularity, after then the session connection between core network control surface function and core network user face function is set up, the access network node receives the terminal iidentification for distinguishing the terminal connection from core network control surface function；The access network node sets up the mapping relations of downstream transmission according to the information of the downlink transfer passage of the terminal iidentification, the tunnel information of aggregating tunnel and the access network node terminaloriented；The terminal iidentification is sent to the terminal by the access network node, and the tunnel that realizing different UE can all be based between same AN Node nodes and core network user face function carries out data transmission.

Description

The method and device of the user face data tunnel transmission of access network node granularity

Technical field

The present invention relates to communication technical field, more particularly to a kind of access network node granularity cellular network User face data tunnel The method and device of road transmission.

Background technology

In existing EPC (Evolved Packet Core) framework, the granularity in tunnel is to carry.Adhere to network in UE (terminal), When setting up PDU (Packet Data Unit, Packet Data Unit) session connection, eNodeB (base station), SGW (Serving GateWay, gateway) and PGW (PDN GateWay, PDN Gateway) can for each carrying distribution one TEID (Tunnel Endpoint Identifier, Tunnel End Point Identifier), TEID can uniquely identify a tunnel.For example from eNB to SGW Upstream data bag can add the TEID that SGW is distributed in GTP encapsulation headers, be identified as the uplink tunnel from eNB to SGW.

Purpose using GTP (GPRS Tunnelling Protocol, GPRS Tunnel Protocol) tunnel mainly has three： (1) realize based on QoS (Quality of Service, the service quality) controls for carrying granularity；(2) mobility of UE is supported； (3) the correct IP transmission channels in mobile network inside are supported, that is, is set up from eNodeB to SGW again to the correct upper and lower line number of PGW According to transmission channel.Magnanimity IoT (Internet of Things, Internet of Things) is if equipment uses the carrying granularity in EPC system Tunneling mechanism, then network needs to safeguard substantial amounts of upstream and downstream user face tunnel identification information.

The content of the invention

In view of above-mentioned technical problem, a kind of user face data tunnel of access network node granularity of embodiment of the present invention offer is passed Defeated method and device, realizes the tunnel that different UE can be based between same AN Node nodes and core network user face function Carry out data transmission.

According to the one side of the embodiment of the present invention, there is provided a kind of cellular network User face data of access network node granularity The method of tunnel transmission, including：

Access network node judges whether the aggregating tunnel for needing to use access network node granularity for terminal；

If desired the aggregating tunnel of the access network node granularity is used for the terminal, then in core network control surface function And after the session connection between the function of core network user face is set up, the access network node receives use from core network control surface function In the terminal iidentification for distinguishing the terminal connection；

The access network node according to the terminal iidentification, the tunnel information of aggregating tunnel and the access network node towards The information of the downlink transfer passage of terminal, sets up the mapping relations of downstream transmission；

The terminal iidentification is sent to the terminal by the access network node.

Alternatively, access network node judges whether the aggregating tunnel for needing to use access network node granularity for terminal, including：

The tunnel selection auxiliary information that the access network node receiving terminal sends；

The access network node selects auxiliary information to judge whether to need to use access network section for terminal according to the tunnel The aggregating tunnel of point granularity.

Alternatively, the access network node receives the terminal iidentification of the terminal from the core network control surface function, Including：

The access network node is used to the access network node aggregating tunnel opposite end core net that core network control surface function sends The mark of family face function；

The access network node receives the IP address of the terminal that the core network control surface function sends；

Wherein, the IP address of the terminal is according to the access network node aggregating tunnel pair by core network control surface function What end core network users face function determined；

Or

The access network node sends the mark of terminal type and access network node, Huo Zhesuo to core network control surface function State access network node and send terminal type to core network control surface function；

Wherein, the IP address of the terminal is according to the access network node aggregating tunnel pair by core network control surface function What end core network users face function determined.

Alternatively, the terminal iidentification be one be used for represent terminal connection label information, the label information be by Core network control surface function is terminal distribution, sets up request message by user plane by core network control surface function and believes the label Breath passes to core network user face function.

Alternatively, if upstream data bag is transmitted during to the access network node, methods described also includes：

If the access network node only supports aggregating tunnel mechanism, the access network node is by upstream data bag and accesses The aggregating tunnel of net node granularity is mapped, and upstream data is forwarded a packet into corresponding core network user face function；Or

If the access network node supports aggregating tunnel mechanism and other tunneling mechanisms, the access network node will be wireless Transmission channel mark is mapped with Tunnel Identifier, and the upstream data is forwarded a packet into corresponding core network user face function.

Alternatively, if downlink data packet is transmitted to the access network node by the aggregating tunnel of access network node granularity When, methods described also includes：

The access network node recognizes the terminal iidentification in the downlink data packet；

The access network node according to the mapping relations of the terminal iidentification and downlink transfer passage, by the downlink data Bag is transmitted to the terminal.

Alternatively, if the terminal iidentification is empty IP address, methods described also includes：

Mapping of the access network node by recognizing IP address and downlink transfer passage that dhcp message sets up terminal is closed System.

Alternatively, the access network node sets up the IP address and downlink transfer passage of terminal by recognizing dhcp message Mapping relations, including：

The MAC Address of terminal is closed with the mapping of downlink transfer passage in the access network node identification DHCP request message System, wherein, the DHCP request message be after a connection setup, terminal to Dynamic Host Configuration Protocol server send for asking allocative efficiency IP address message；

The access network node recognizes dhcp response message, obtains the mapping of the IP address of terminal and the MAC Address of terminal Relation；

The access network node according to the MAC Address of terminal and the mapping relations of downlink transfer passage, and terminal IP Address and the mapping relations of the MAC Address of terminal, set up the IP address of terminal and the mapping relations of downlink transfer passage.

According to second aspect of the embodiment of the present invention, a kind of cellular network User face of access network node granularity is additionally provided The method of tunnel packets, including：

It is determined that need for terminal use access network node granularity aggregating tunnel when, core network control surface function determine to The terminal iidentification of terminal distribution；

The core network control surface function sends the terminal iidentification of the terminal to access network node, so that access network node The information of the downlink transfer passage according to terminal iidentification, tunnel information and access network node terminaloriented, sets up downstream transmission Mapping relations.

Alternatively, core network control surface function determined to the terminal iidentification of terminal distribution, including：

The core network control surface function according to the mark of access network node aggregating tunnel opposite end core network user face function, It is determined that corresponding core network user function；

The core network control surface function is the end from the IP address pond corresponding to the function of the core network user face End distribution IP address；

Or

The core network control surface function is according to terminal type and the mark of access network node, it is determined that corresponding core net is used Family face function；

The core network control surface function judges whether to need to be used to represent the connection of terminal for the terminal distribution one Label information；

If so, then the core network control surface function is terminal distribution label information, and will in user plane sets up message The label information is sent to core network user face function, and the label information is sent into described connecing by core network control surface function Network access node.

According to the 3rd aspect of the embodiment of the present invention, a kind of cellular network User face of access network node granularity is additionally provided The method of tunnel packets, including：

Tunnel selection auxiliary information is provided to core network control surface function or selection auxiliary information in tunnel is not provided in terminal When, core network control surface function judges whether the aggregating tunnel for needing to use access network node granularity for terminal；

If desired the aggregating tunnel of the access network node granularity is used for the terminal, then the core network control surface work( Can determine that the terminal iidentification for distinguishing the terminal connection；

Alternatively, the core network control surface function judges whether the polymerization for needing to use access network node granularity for terminal Tunnel, including：

Tunnel selection auxiliary information is provided to core network control surface function or selection auxiliary information in tunnel is not provided in terminal When, the CAMEL-Subscription-Information of terminal described in the core network control surface functional inquiry；

The core network control surface function judges whether to need to use access network node for terminal according to the CAMEL-Subscription-Information The aggregating tunnel of granularity.

According to the 4th aspect of the embodiment of the present invention, a kind of access network node is additionally provided, including：

First judge module, for the aggregating tunnel for judging whether to need to use access network node granularity for terminal；

Receiver module, for being if desired aggregating tunnel of the terminal using the access network node granularity, in core After session connection between network control surface function and core network user face function is set up, being received from core network control surface function is used for Distinguish the terminal iidentification of the terminal connection；

First mapping block, for according to the terminal iidentification, the tunnel information of aggregating tunnel and the access network node The information of the downlink transfer passage of terminaloriented, sets up the mapping relations of downstream transmission；

First sending module, the terminal is sent to for the access network node by the terminal iidentification.

Alternatively, first judge module includes：

First receiving unit, auxiliary information is selected for the tunnel that receiving terminal sends；

First judging unit, for selecting auxiliary information to judge whether to need to use access network for terminal according to the tunnel The aggregating tunnel of node granularity.

Alternatively, the receiver module includes：

First transmitting element, for the access network node aggregating tunnel opposite end core net sent to core network control surface function The mark of user plane functions；

Second receiving unit, the IP address for receiving the terminal that the core network control surface function sends；

Or

Second transmitting element, the mark for sending terminal type and access network node to core network control surface function, or Person sends terminal type to core network control surface function；

3rd receiving unit, the IP address for receiving the terminal that the core network control surface function sends；

Alternatively, the terminal iidentification be one be used for represent terminal connection label information, the label information be by Core network control surface function is terminal distribution, and core network control surface sets up request message and transmits the label information by user plane Give core network user face function.

Alternatively, if upstream data bag is transmitted during to the access network node, the access network node also includes：

Upstream data bag transport module, if only supporting aggregating tunnel mechanism for the access network node, by upstream data Bag is mapped with the aggregating tunnel of access network node granularity, and upstream data is forwarded a packet into corresponding core network user face work( Energy；Or

If the access network node supports aggregating tunnel mechanism and other tunneling mechanisms, by wireless transfer channel mark and tunnel Road mark is mapped, and the upstream data is forwarded a packet into corresponding core network user face function.

Alternatively, if downlink data packet is transmitted to the access network node by the aggregating tunnel of access network node granularity When, the access network node also includes：

Downlink data packet identification module, for recognizing the terminal iidentification in the downlink data packet；

Downstream packet transmission module, for the mapping relations according to the terminal iidentification and downlink transfer passage, by institute State downlink data packet and be transmitted to the terminal.

Alternatively, if the terminal iidentification is empty IP address, the access network node also includes：

Second mapping block, for by recognizing that dhcp message sets up the IP address of terminal and the mapping of downlink transfer passage Relation.

According to the 5th aspect of the embodiment of the present invention, a kind of core network control surface function is additionally provided, including：

First determining module, for it is determined that need for terminal use access network node granularity aggregating tunnel when, it is determined that To the terminal iidentification of terminal distribution；

Second sending module, the terminal iidentification for sending the terminal to access network node, so that access network node root According to the information of the downlink transfer passage of terminal iidentification, tunnel information and access network node terminaloriented, downstream transmission is set up Mapping relations.

Alternatively, the first determining module includes：

First determining unit, for the mark according to access network node aggregating tunnel opposite end core network user face function, really Fixed corresponding core network user function；

First allocation unit, for being the terminal point from the IP address pond corresponding to the function of the core network user face With IP address；

Or

Second determining unit, for the mark according to terminal type and access network node, it is determined that corresponding core network user Face function；

3rd judging unit, the label of the connection for judging whether to need to be used to represent terminal for the terminal distribution one Information；

Second allocation unit, the label information of the connection for if desired being used to represent terminal for the terminal distribution one, And the label information is sent to core network user face in user plane sets up message, by core network control surface function by the mark Label information is sent to the access network node.

According to the 6th aspect of the embodiment of the present invention, a kind of core network control surface function is additionally provided, including：

Second judge module, for providing tunnel selection auxiliary information to core network control surface function in terminal or not providing During tunnel selection auxiliary information, judge whether the aggregating tunnel for needing to use access network node granularity for terminal；

Second determining module, for being if desired aggregating tunnel of the terminal using the access network node granularity, really The fixed terminal iidentification for being used to distinguish the terminal connection；

3rd sending module, the terminal iidentification for sending the terminal to access network node, so that access network node root According to the information of the downlink transfer passage of terminal iidentification, tunnel information and access network node terminaloriented, downstream transmission is set up Mapping relations.

Alternatively, second judge module includes：

Query unit, for providing tunnel selection auxiliary information to core network control surface function in terminal or not providing tunnel During selection auxiliary information, the CAMEL-Subscription-Information of the terminal is inquired about；

4th judging unit, for judging whether to need according to the CAMEL-Subscription-Information to use access network node granularity for terminal Aggregating tunnel.

A technical scheme in above-mentioned technical proposal has the following advantages that or beneficial effect：In the scene of fixed wireless UE Under, using simplified tunneling mechanism, setting up the Tunnel Identifier based on AN Node granularities, that is, the UE for accessing identical AN Node is shared Identical upstream and downstream user face Tunnel Identifier.The tunneling mechanism based on AN Node granularities in embodiment, simplifies gateway and base Stand the tunnel management ability of side, simplify the user plane Tunnel Identifier message in flow, save tunnel resource.

Brief description of the drawings

Fig. 1 is the schematic diagram of fixed wireless UE access network frameworks；

Fig. 2 is the flow of the method for the user face data tunnel transmission of access network node granularity in the embodiment of the present invention one Figure；

Fig. 3 is the flow of the method for the user face data tunnel transmission of access network node granularity in the embodiment of the present invention two Figure；

Fig. 4 is the schematic diagram of the aggregating tunnel PDU session establishment flows of AN Node granularities in the embodiment of the present invention three；

Fig. 5 is the schematic diagram of the aggregating tunnel PDU session establishment flows of AN Node granularities in the embodiment of the present invention four；

Fig. 6 is the schematic diagram of aggregating tunnel attachment (Attach) flow of AN Node granularities in the embodiment of the present invention five；

Fig. 7 is the schematic diagram of aggregating tunnel attachment (Attach) flow of AN Node granularities in the embodiment of the present invention six；

Fig. 8 is the structural representation of access network node in the embodiment of the present invention seven；

Fig. 9 is the structural representation of core network control surface function in the embodiment of the present invention eight；

Figure 10 is the flow of the method for the user face data tunnel transmission of access network node granularity in the embodiment of the present invention nine Figure；

Figure 11 is the structural representation of core network control surface function in the embodiment of the present invention ten.

Specific embodiment

The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in accompanying drawing Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here Limited.Conversely, there is provided these embodiments are able to be best understood from the disclosure, and can be by the scope of the present disclosure Complete conveys to those skilled in the art.

One skilled in the art will appreciate that embodiments of the present invention can be implemented as a kind of system, device, equipment, method Or computer program product.Therefore, embodiments of the invention can be implemented as following form：It is complete hardware, complete Software (including firmware, resident software, microcode etc.), or the form that hardware and software is combined.

Embodiments of the invention are applied to new network framework, such as the 5G network architectures.Referring to Fig. 1, the end shown in figure End, the tunneling mechanism that such as fixed wireless UE (such as fixed IoT equipment or with family gateway equipment that 5G is passback) is accessed is excellent Change.This Terminal Type often has such as：Do not need mobility, to the less demanding of QoS difference, thus tunneling mechanism used can be with letter Change, tunnel granularity can be reduced to AN Node granularities, that is, the UE for accessing identical AN Node shares a Tunnel Identifier.

The 5G network architectures are main by core network control surface function (CP Functions) and core network user face function (UP Function) constitute.Core network control surface function includes Session Management (session management) function, realizes user plane The foundation of passage.Core network user face function mainly realizes the forwarding of packet.

Embodiment one

Referring to Fig. 2, the method that a kind of cellular network User face tunnel packets of access network node granularity are shown in figure Flow, comprise the following steps that：

Step 201, access network node judge whether the aggregating tunnel for needing to use access network node granularity for terminal, if It is, then into step 202；Otherwise, it is terminal distribution Radio Resource according to existing mode, for example：According in existing EPC system Carrying granularity tunneling mechanism be terminal distribution Radio Resource, herein no longer apply state.

Above-mentioned access network node is alternatively referred to as AN Node, referring to Fig. 1.

Above-mentioned terminal can be fixed wireless UE, such as fixed IoT equipment or with family gateway equipment that 5G is passback Deng.

The aggregating tunnel of above-mentioned access network node granularity refers to (such as to be carried as the multiple that granularity is set up by multiple links Link) tunnel being polymerized to access network node as granularity, the aggregating tunnel has a Tunnel Identifier, accesses identical AN The UE of Node can share the Tunnel Identifier.

In the present embodiment, access network node can judge whether to need to use access network section for terminal in the following manner The aggregating tunnel of point granularity：

The tunnel selection auxiliary information that access network node receiving terminal sends, then access network node is auxiliary according to tunnel selection Supplementary information judges whether the aggregating tunnel for needing to use access network node granularity for terminal, wherein, tunnel selection auxiliary information can Being terminal type；

After step 202, the session connection between core network control surface function and core network user face function are set up, access network Node receives the terminal iidentification for distinguishing terminal connection from core network control surface function；

In the present embodiment, the terminal iidentification for distinguishing terminal connection can be the end of core network control surface function distribution The IP address at end, such as label information of the terminal of IPv4 addresses, or core network control surface function distribution.

Alternatively, above-mentioned label information be by core network control surface function be terminal distribution, core network control surface by use Family face sets up request message and the label information is passed into core network user face function.

In the present embodiment, access network node can be received eventually by following two modes from core network control surface function The terminal iidentification at end：

The access network node aggregating tunnel opposite end core net that mode one, access network node sends to core network control surface function The mark of user plane functions；Access network node receives the IP address of the terminal that core network control surface function sends；Wherein, terminal IP address is determined according to access network node aggregating tunnel opposite end core network user face function by core network control surface function；

Mode two, access network node sends the mark of terminal type and access network node to core network control surface function, or Person's access network node sends terminal type to core network control surface function；Access network node receives core network control surface function and sends Terminal IP address；Wherein, the IP address of terminal is according to access network node polymerization tunnel by core network control surface function What road opposite end core network user face function determined.

Step 203, access network node are according to terminal iidentification, the tunnel information of aggregating tunnel and access network node terminaloriented Downlink transfer passage information, set up the mapping relations of downstream transmission；

The tunnel information of above-mentioned aggregating tunnel can be the mark in tunnel, for example tunnel ID, be also not limited to certainly.

Specifically, access network node is according to terminal iidentification and the letter of the downlink transfer passage of access network node terminaloriented Breath, sets up the mapping relations of downlink transfer；Access network node sets up up according to terminal iidentification and the tunnel information of aggregating tunnel The mapping relations of transmission, that is, accessing the UE of identical AN Node can share identical upstream and downstream user face Tunnel Identifier.

Terminal iidentification is sent to terminal by step 204, access network node.

Prior art is the tunneling mechanism for carrying granularity.But in the case of the big connection of Internet of Things, based on the tunnel for carrying granularity Road mechanism needs network side to safeguard substantial amounts of tunnel identification information, brings the waste of Internet resources.Cellular Networks are being used as solid Also because mobility requirement is low under the scene of fixed width band passback, wave is equally caused to Internet resources based on the tunnel for carrying granularity Take.In the present embodiment, under the scene of fixed wireless UE, using simplified tunneling mechanism, set up based on AN Node granularities Tunnel Identifier, that is, the UE for accessing identical AN Node shares identical upstream and downstream user face Tunnel Identifier.In embodiment based on AN The tunneling mechanism of Node granularities, simplifies the tunnel management ability of gateway and base station side, simplifies the user plane tunnel in flow Mark message, saves tunnel resource.

Embodiment two

Referring to Fig. 3, the method that a kind of cellular network User face tunnel packets of access network node granularity are shown in figure Flow, comprise the following steps that：

Step 301, it is determined that need for terminal use access network node granularity aggregating tunnel when, core network control surface work( Can determine that to the terminal iidentification of terminal distribution；

In the present embodiment, core network control surface function in the following manner is determined to the terminal iidentification of terminal distribution：

Mode one, core network control surface function according to access network node aggregating tunnel opposite end core network user face function, really Fixed corresponding core network user function；Core network control surface function is from the IP address pond corresponding to the function of core network user face Terminal distribution IP address；

Mode two, core network control surface function are according to terminal type and the mark of access network node, it is determined that corresponding core Network users face function；Core network control surface function judges whether to need the label of the connection for being used to represent terminal for terminal distribution one Information；If so, then core network control surface function is terminal distribution label information, and the label is believed in user plane sets up message Breath is sent to core network user face, and label information is sent to access network node by core network control surface function.

Step 302, core network control surface function send the terminal iidentification of the terminal to access network node, so that access network Node sets up up-downgoing according to the information of the downlink transfer passage of terminal iidentification, tunnel information and access network node terminaloriented The mapping relations of transmission.

In the present embodiment, under the scene of fixed wireless UE, using simplified tunneling mechanism, set up and be based on AN Node The Tunnel Identifier of granularity, that is, the UE for accessing identical AN Node shares identical upstream and downstream user face Tunnel Identifier.In embodiment Based on the tunneling mechanism of AN Node granularities, the tunnel management ability of gateway and base station side is simplified, simplify the user in flow Face Tunnel Identifier message, saves tunnel resource.

Embodiment three

Referring to Fig. 4, the aggregating tunnel PDU session establishment flows of AN Node granularities are shown in figure, led in the present embodiment The IP address for crossing UE (terminal) distinguishes UE connections, comprises the following steps that：

Step 401, UE send session establishment request message to AN Node；

Above-mentioned session establishment request message is included but is not limited to：Tunnel selects auxiliary information, tunnel selection auxiliary information It can be terminal type.

For certain Terminal Type, (such as fixed IoT equipment is set such as fixed wireless UE with the home gateway that 5G is passback It is standby) access tunneling mechanism optimization.This Terminal Type often has such as：Do not need mobility, to the less demanding of QoS difference, because And tunneling mechanism used can simplify, tunnel granularity can be reduced to AN Node granularities, that is, the UE for accessing identical AN Node is shared One Tunnel Identifier.

Step 402, AN Node send session establishment request message to core network control surface function；

In the present embodiment, AN Node select auxiliary information to judge whether UE accesses AN Node by the tunnel that UE is carried Granularity tunnel.When AN Node judge that the UE need to use AN Node granularity tunnels：

A kind of mode, AN Node add tunnel opposite end core network user face function (core in the session establishment request message Heart network users face function) IP address and be transmitted to core network control surface function.

Another way, it will words set up request message (including terminal type, access network node mark (AN Node ID) Deng) it is transmitted to core network control surface function.

If it should be noted that core network control surface function can judge the AN according to session establishment request message source Node, then can not carry AN Node ID in session establishment request message.

Step 403, core network control surface function send user plane and set up request to core network user face function；

In the present embodiment, information (such as core net of the core network control surface function in session establishment request message The IP address of user plane functions, or terminal type and AN Node ID) select corresponding core network user face function, and from this For UE distributes IP address in IP address pond corresponding to the function of core network user face, and core network control surface function will be to UE points The IP address matched somebody with somebody informs core network user face function.

Step 404, core network user face function send user plane foundation and reply message to core network control surface function.

Step 405, core network control surface function send session establishment and reply message to AN Node；

Session establishment is replied message including but not limited to：The IP address of UE.It should be noted that the IP address of UE can be by Access network is recognized, therefore, can simultaneously carry the IP address of distributed to UE that AN Node are issued in inside and outside layer signaling message (such as in addition to being carried in NAS message, while carrying UE IP address in AS message).

The information of IP address, tunnel information and its downlink transfer passage towards UE that AN Node are allocated according to UE is built The mapping relations of vertical downstream transmission.

Above-mentioned downlink transfer passage can be the empty port load-supporting between access network and UE, or in access network between BBU and RRU etc..

The information of above-mentioned downlink transfer passage can be allocated to the radio bearer ID of UE, or UE MAC Address etc..

The IP address of UE is passed to UE by step 406, AN Node, and is UE distributing radio resources.

If it should be noted that the IP address that terminal is distributed in above-mentioned steps 405 is a sky IP address, such as IPv4 Location 0.0.0.0, then after session connection foundation, UE sends message to Dynamic Host Configuration Protocol server, asks the IPv4 addresses of allocative efficiency, this When AN Node set up the IPv4 addresses of UE and the relation of down going channel by recognizing dhcp message.I.e.：

AN Node can first recognize UE MAC Address and access side number in DHCP request message (DHCP request message) According to the corresponding relation of passage (such as empty port load-supporting).Then, AN Node recognize DHCP response message (dhcp response disappear again Breath) so that the IPv4 addresses of UE and the corresponding relation of MAC Address are obtained, so as to set up the IP address and UE down going channels of UE Corresponding relation.

Step 407, AN Node send session establishment completion message to core network control surface function.

PDU session establishment flows are described in above-mentioned steps 401~407, is situated between with reference to step 408a and step 408b Continue up-downgoing data transmission scheme.

Step 408a, when transmitting uplink data is to AN Node, the upstream data that AN Node send UE enters with tunnel Row mapping, tunnel encapsulation is carried out to packet, is forwarded to corresponding core network user face function.

If AN Node only support aggregating tunnel, up to be mapped in aggregating tunnel, by multiple wireless transfer channel marks Know and do many-one mapping with an aggregating tunnel mark.

If AN Node support other tunneling mechanisms (such as tunnel of PDU sessions granularity) simultaneously, AN Node are by a nothing Line transmission channel mark (MAC Address of such as Radio Bearer ID (radio bearer identification), or UE) is done with a Tunnel Identifier One-to-one mapping.

Step 408b, in downlink data transmission to core network user face function, core network user face function by polymerization By downlink data transmission to AN Node, AN Node are by corresponding downlink transfer passage by lower line number for tunnel or other tunnels According to transmitting to UE.

If AN Node support that other tunneling mechanisms (such as tunnel of PDU sessions granularity), downlink data packet are reached simultaneously During AN, AN judges it is the downlink data from which class tunnel transmission,

If mode one, sent from PDU session granularities tunnel, PDU session granularity tunnels and access network downlink transfer are logical There is one-to-one relationship in road.Can be carried out with such as empty port load-supporting ID corresponding, UE is transferred to downwards.

If mode two, sent from Node granularity aggregating tunnels, the UE IP in AN Node identification downlink data packets Address (destination address of packet in tunnel), the mapping relations of IP address and access network downlink transfer passage according to the UE will Downlink data packet is transmitted to UE, and above-mentioned access network downlink transfer passage can be the empty port load-supporting between access network and UE, or accesses In net between BBU and RRU etc..

Example IV

In the present embodiment, the connection of UE is distinguished by the label information of UE, in aggregating tunnel, in addition to IP address, can Downlink data packet is recognized by introducing the label information of single UE.

Referring to Fig. 5, the aggregating tunnel PDU session establishment flows of AN Node (access network node) granularity are shown in figure, had Body step is as follows：

Step 501, UE send session establishment request message to AN Node；

Step 502, AN Node send session establishment request message to core network control surface function；

Step 503, core network control surface function are the label information of the connection distribution UE of the UE, and are set up by user plane Message transmission gives core network user face function；

It is specific as follows：

Core network control surface function judges whether to need to be label information (the alternatively referred to as ID marks of UE connection distribution UE Know), if so, then core network control surface function is the label information of the connection distribution UE of the UE, and message is set up by user plane Pass to core network user face function.Core network user face function label letter comprising the UE in the downlink data packet for issue UE Breath, when such as using GTP tunnel, the label information of the UE can be labeled in " encapsulation header " word between IP packet header and user Payload Section.

Alternatively, core network control surface function can (such as non-IP connections of Internet of Things be whole according to network strategy, terminal type End) judge whether to need to be identified for UE connection distribution ID.

Step 504, core network user face function send user plane foundation and reply message to core network control surface function；

Step 505, core network control surface send session establishment and reply message to AN Node, and content is included but is not limited to：Should The label information of UE connections.The label information of UE (can be carried) with accessed network identification such as in AS message.

AN Node are according to the label information for distinguishing the UE that UE is connected, tunnel information and its downlink transfer towards UE The information of passage sets up the mapping relations of downstream transmission.

The label information of UE is passed to UE by step 506, AN Node, and is UE distributing radio resources.

Step 507, AN Node send session establishment completion message to core network control surface function.

PDU session establishment flows are described in above-mentioned steps 501~507, is situated between with reference to step 508a and step 508b Continue up-downgoing data transmission scheme.

Step 508a, when transmitting uplink data is to AN Node, the upstream data that AN Node send UE enters with tunnel Row mapping, tunnel encapsulation is carried out to packet, is forwarded to corresponding core network user face function.

Step 508b, core network user face function add downlink tunnel mark and use in the packet encapsulation head for issuing UE In the label information of the UE for distinguishing UE connections, and it is forwarded to correct AN Node.AN Node according to the label information of the UE and Downlink data packet is transmitted to UE by the mapping relations of access network downlink transfer passage, and above-mentioned access network downlink transfer passage can be Empty port load-supporting between access network and UE, or in access network between BBU (Remote Radio Unit) and RRU (baseband processing unit) etc..

Embodiment five

Referring to Fig. 6, aggregating tunnel attachment (Attach) flow of AN Node granularities is shown in figure, in the present embodiment UE is distinguished by the IP address of UE (terminal) to connect, comprise the following steps that：

Step 601, UE send Attach Request message to AN Node；

Above-mentioned Attach Request message is included but is not limited to：Tunnel selects auxiliary information, and tunnel selection auxiliary information can be with It is terminal type.

Step 602, AN Node send Attach Request message to core network control surface function；

A kind of mode, AN Node add tunnel opposite end core network user face function (core net in the Attach Request message User plane functions) IP address and be transmitted to core network control surface function.

Another way, by Attach Request message (including terminal type, access network node mark (AN Node ID) etc.) It is transmitted to core network control surface function.

Step 603, core network control surface function send user plane and set up request to core network user face function；

In the present embodiment, information (such as core network user of the core network control surface function in Attach Request message The IP address of face function, or terminal type and AN Node ID) select corresponding core network user face function, and from the core For UE distributes IP address in IP address pond corresponding to the function of network users face, and core network control surface function will be distributed to UE IP address informs core network user face function.

Step 604, core network user face function send user plane foundation and reply message to core network control surface function.

Step 605, core network control surface function send attachment and reply message to AN Node；

Attachment is replied message including but not limited to：The IP address of UE.It should be noted that the IP address of UE can be accessed Net identification, therefore, can simultaneously carry the IP address of distributed to UE that AN Node are issued in inside and outside layer signaling message (such as In addition to being carried in NAS message, while carrying UE IP address in AS message).

The IP address of UE is passed to UE by step 606, AN Node, and is UE distributing radio resources.

If it should be noted that the IP address that terminal is distributed in above-mentioned steps 805 is a sky IP address, such as IPv4 Location 0.0.0.0, then after session connection foundation, UE sends message to Dynamic Host Configuration Protocol server, asks the IPv4 addresses of allocative efficiency, this When AN Node set up the IPv4 addresses of UE and the relation of down going channel by recognizing dhcp message.I.e.：

Step 607, AN Node send session establishment completion message to core network control surface function.

PDU session establishment flows are described in above-mentioned steps 601~607, is situated between with reference to step 608a and step 608b Continue up-downgoing data transmission scheme.

Step 608a, when transmitting uplink data is to AN Node, the upstream data that AN Node send UE enters with tunnel Row mapping, tunnel encapsulation is carried out to packet, is forwarded to corresponding core network user face function.

Step 608b, in downlink data transmission to core network user face function, core network user face function by polymerization By downlink data transmission to AN Node, AN Node are by corresponding downlink transfer passage by lower line number for tunnel or other tunnels According to transmitting to UE.

Embodiment six

Referring to Fig. 7, aggregating tunnel attachment (Attach) flow of AN Node granularities is shown in figure, comprised the following steps that：

Step 701, UE send Attach Request message to AN Node；

Step 702, AN Node send Attach Request message to core network control surface function；

Step 703, core network control surface function are the label information of the connection distribution UE of the UE, and are set up by user plane Message transmission gives core network user face function；

It is specific as follows：

Step 704, core network user face function send user plane foundation and reply message to core network control surface function；

Step 705, core network control surface send attachment and reply message to AN Node, and content is included but is not limited to：The UE connects The label information for connecing.The label information of UE (can be carried) with accessed network identification such as in AS message.

The label information of UE is passed to UE by step 706, AN Node, and is UE distributing radio resources.

Step 707, AN Node send session establishment completion message to core network control surface function.

PDU session establishment flows are described in above-mentioned steps 701~707, is situated between with reference to step 708a and step 708b Continue up-downgoing data transmission scheme.

Step 708a, when transmitting uplink data is to AN Node, the upstream data that AN Node send UE enters with tunnel Row mapping, tunnel encapsulation is carried out to packet, is forwarded to corresponding core network user face function.

Step 708b, core network user face function add downlink tunnel mark and use in the packet encapsulation head for issuing UE In the label information of the UE for distinguishing UE connections, and it is forwarded to correct AN Node.AN Node according to the label information of the UE and Downlink data packet is transmitted to UE by the mapping relations of access network downlink transfer passage, and above-mentioned access network downlink transfer passage can be Empty port load-supporting between access network and UE, or in access network between BBU and RRU etc..

Embodiment seven

A kind of access network node is shown referring to Fig. 8, in figure, access network node 800 includes：

First judge module 801, for the aggregating tunnel for judging whether to need to use access network node granularity for terminal；

Receiver module 802, for being if desired aggregating tunnel of the terminal using the access network node granularity, from core The terminal iidentification for distinguishing the terminal connection is received at heart network control surface function；

First mapping block 803, for according to the terminal iidentification, the tunnel information of aggregating tunnel and the access network section The information of the downlink transfer passage of point terminaloriented, sets up the mapping relations of downstream transmission；

First sending module 804, the terminal is sent to for the access network node by the terminal iidentification.

In the present embodiment, alternatively, first judge module includes：

In the present embodiment, alternatively, the receiver module includes：

Or

In the present embodiment, alternatively, the terminal iidentification be one be used for represent terminal connection label information, it is described Label information be by core network control surface function be terminal distribution, core network control surface sets up request message by user plane should Label information passes to core network user face function.

In the present embodiment, alternatively, if upstream data bag is transmitted during to the access network node, the access network node Also include：

In the present embodiment, alternatively, if downlink data packet is transmitted to institute by the aggregating tunnel of access network node granularity When stating access network node, the access network node also includes：

In the present embodiment, alternatively, if the terminal iidentification is empty IP address, the access network node also includes：

Embodiment eight

A kind of core network control surface function is shown referring to Fig. 9, in figure, core network control surface function 900 includes：

First determining module 901, for it is determined that need for terminal use access network node granularity aggregating tunnel when, really The fixed terminal iidentification to terminal distribution；

Second sending module 902, the terminal iidentification for sending the terminal to access network node, so that access network node The information of the downlink transfer passage according to terminal iidentification, tunnel information and access network node terminaloriented, sets up downstream transmission Mapping relations.

In the present embodiment, alternatively, the first determining module includes：

Or

Embodiment nine

Referring to Figure 10, the method that a kind of cellular network User face tunnel packets of access network node granularity are shown in figure Flow, comprise the following steps that：

Step 1001, terminal to core network control surface function provide tunnel selection auxiliary information or do not provide tunnel select During auxiliary information, core network control surface function judges whether the aggregating tunnel for needing to use access network node granularity for terminal, if It is, into step 1002；Otherwise, this flow is terminated；

Step 1002, core network control surface function determine the terminal iidentification for distinguishing the terminal connection；

Step 1003, core network control surface function send the terminal iidentification of the terminal to access network node, so as to access Net node sets up upper and lower according to the information of the downlink transfer passage of terminal iidentification, tunnel information and access network node terminaloriented The mapping relations of row transmission.

In the present embodiment, alternatively, the core network control surface function judges whether to need to use access network for terminal The aggregating tunnel of node granularity, including：

In the present embodiment, alternatively, core network control surface function determines the terminal mark for distinguishing the terminal connection Know, including：

Or

Embodiment ten

A kind of core network control surface function is shown referring to Figure 11, in figure, core network control surface function 1100 includes：

Second judge module 1101, for providing tunnel selection auxiliary information or not to core network control surface function in terminal When tunnel selection auxiliary information is provided, judge whether the aggregating tunnel for needing to use access network node granularity for terminal；

Second determining module 1102, for being if desired polymerization tunnel of the terminal using the access network node granularity Road, it is determined that the terminal iidentification for distinguishing the terminal connection；

3rd sending module 1103, the terminal iidentification for sending the terminal to access network node, so that access network section Point sets up up-downgoing biography according to the information of the downlink transfer passage of terminal iidentification, tunnel information and access network node terminaloriented Defeated mapping relations.

Alternatively, second judge module includes：

It should be understood that " one embodiment " or " embodiment " that specification is mentioned in the whole text means relevant with embodiment Special characteristic, structure or characteristic are included at least one embodiment of the present invention.Therefore, occur everywhere in entire disclosure " in one embodiment " or " in one embodiment " not necessarily refers to identical embodiment.Additionally, these specific feature, knots Structure or characteristic can be combined in one or more embodiments in any suitable manner.

In various embodiments of the present invention, it should be appreciated that the size of the sequence number of above-mentioned each process is not meant to that execution is suitable The priority of sequence, the execution sequence of each process should be determined with its function and internal logic, without the implementation of the reply embodiment of the present invention Process constitutes any restriction

In addition, the terms " system " and " network " are often used interchangeably herein.

It should be understood that the terms "and/or", a kind of only incidence relation for describing affiliated partner, expression can be deposited In three kinds of relations, for example, A and/or B, can represent：Individualism A, while there is A and B, individualism B these three situations. In addition, character "/" herein, typicallys represent forward-backward correlation pair as if a kind of relation of "or".

In embodiment provided herein, it should be appreciated that " B corresponding with A " represents that B is associated with A, can be with according to A Determine B.It is also to be understood that determine that B is not meant to determine B only according to A according to A, can also be according to A and/or other information Determine B.

In several embodiments provided herein, it should be understood that disclosed method and apparatus, can be by other Mode realize.For example, device embodiment described above is only schematical, for example, the division of the unit, only It is a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple units or component can be combined Or another system is desirably integrated into, or some features can be ignored, or do not perform.Another, shown or discussed phase Coupling or direct-coupling or communication connection between mutually can be by some interfaces, the INDIRECT COUPLING or communication of device or unit Connection, can be electrical, mechanical or other forms.

In addition, during each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to It is that the independent physics of unit includes, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list Unit can both be realized in the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit to realize.

The above-mentioned integrated unit realized in the form of SFU software functional unit, can store and be deposited in an embodied on computer readable In storage media.Above-mentioned SFU software functional unit storage is in a storage medium, including some instructions are used to so that a computer Equipment (can be personal computer, server, or network equipment etc.) performs receiving/transmission method described in each embodiment of the invention Part steps.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (Read-Only Memory, abbreviation ROM), random access memory (Random Access Memory, abbreviation RAM), magnetic disc or CD etc. are various can store The medium of program code.

Above-described is the preferred embodiment of the present invention, it should be pointed out that the ordinary person for the art comes Say, some improvements and modifications can also be made under the premise of principle of the present invention is not departed from, and these improvements and modifications also exist In protection scope of the present invention.

Claims

1. the method for the cellular network User face tunnel packets of a kind of access network node granularity, it is characterised in that including：

If desired the aggregating tunnel of the access network node granularity is used for the terminal, then in core network control surface function and core After session connection between the function of heart network users face is set up, the access network node is received for area from core network control surface function Divide the terminal iidentification of the terminal connection；

The access network node is according to the terminal iidentification, the tunnel information of aggregating tunnel and the access network node terminaloriented Downlink transfer passage information, set up the mapping relations of downstream transmission；

2. method according to claim 1, it is characterised in that it is terminal using accessing that access network node judges whether to need The aggregating tunnel of net node granularity, including：

The access network node selects auxiliary information to judge whether to need to use access network node grain for terminal according to the tunnel The aggregating tunnel of degree.

3. method according to claim 1, it is characterised in that the access network node is from the core network control surface function Place receives the terminal iidentification of the terminal, including：

The access network node aggregating tunnel opposite end core network user face that the access network node sends to core network control surface function The mark of function；

Wherein, the IP address of the terminal is according to the access network node aggregating tunnel opposite end core by core network control surface function What heart network users face function determined；

Or

The access network node sends the mark of terminal type and access network node to core network control surface function, or described connects Network access node sends terminal type to core network control surface function；

Wherein, the IP address of the terminal is according to the access network node aggregating tunnel opposite end core by core network control surface function What heart network users face function determined.

4. method according to claim 1, it is characterised in that the terminal iidentification is a connection for being used to represent terminal Label information, the label information be by core network control surface function be terminal distribution, by core network control surface function by use Family face sets up request message and the label information is passed into core network user face function.

5. method according to claim 1, it is characterised in that if upstream data bag is transmitted during to the access network node, Methods described also includes：

If the access network node only supports aggregating tunnel mechanism, the access network node is by upstream data bag and access network section The aggregating tunnel of point granularity is mapped, and upstream data is forwarded a packet into corresponding core network user face function；Or

If the access network node supports aggregating tunnel mechanism and other tunneling mechanisms, the access network node will be wirelessly transferred Gap marker is mapped with Tunnel Identifier, and the upstream data is forwarded a packet into corresponding core network user face function.

6. method according to claim 1, it is characterised in that if the polymerization tunnel that downlink data packet passes through access network node granularity Road is transmitted during to the access network node, and methods described also includes：

The access network node turns the downlink data packet according to the terminal iidentification and the mapping relations of downlink transfer passage Issue the terminal.

7. method according to claim 1, it is characterised in that if the terminal iidentification is empty IP address, methods described is also Including：

The access network node sets up the IP address of terminal and the mapping relations of downlink transfer passage by recognizing dhcp message.

8. method according to claim 7, it is characterised in that the access network node is set up eventually by recognizing dhcp message The IP address at end and the mapping relations of downlink transfer passage, including：

The MAC Address and the mapping relations of downlink transfer passage of terminal in the access network node identification DHCP request message, its In, the DHCP request message is the IP for asking allocative efficiency that terminal sends to Dynamic Host Configuration Protocol server after a connection setup The message of address；

The access network node recognizes dhcp response message, obtains the mapping relations of the IP address of terminal and the MAC Address of terminal；

The access network node according to the MAC Address of terminal and the mapping relations of downlink transfer passage, and terminal IP address With the mapping relations of the MAC Address of terminal, the IP address of terminal and the mapping relations of downlink transfer passage are set up.

9. the method for the cellular network User face tunnel packets of a kind of access network node granularity, it is characterised in that including：

When it is determined that needing to use the aggregating tunnel of access network node granularity for terminal, core network control surface function is determined to terminal The terminal iidentification of distribution；

The core network control surface function sends the terminal iidentification of the terminal to access network node so that access network node according to The information of the downlink transfer passage of terminal iidentification, tunnel information and access network node terminaloriented, sets up reflecting for downstream transmission Penetrate relation.

10. method according to claim 9, it is characterised in that core network control surface function was determined to the end of terminal distribution End mark, including：

The core network control surface function is the terminal point from the IP address pond corresponding to the function of the core network user face With IP address；

Or

The core network control surface function is according to terminal type and the mark of access network node, it is determined that corresponding core network user face Function；

The core network control surface function judges whether to need the label of the connection for being used to represent terminal for the terminal distribution one Information；

If so, then the core network control surface function is terminal distribution label information, and this is marked in user plane sets up message Label information is sent to core network user face function, and the label information is sent into the access network by core network control surface function Node.

A kind of method of the cellular network User face tunnel packets of 11. access network node granularities, it is characterised in that including：

When terminal provides tunnel selection auxiliary information to core network control surface function or does not provide tunnel selection auxiliary information, core Heart network control surface function judges whether the aggregating tunnel for needing to use access network node granularity for terminal；

If desired the aggregating tunnel of the access network node granularity is used for the terminal, then the core network control surface function is true The fixed terminal iidentification for being used to distinguish the terminal connection；

12. methods according to claim 11, it is characterised in that the core network control surface function judges whether that needs are Terminal uses the aggregating tunnel of access network node granularity, including：

When terminal provides tunnel selection auxiliary information to core network control surface function or does not provide tunnel selection auxiliary information, institute State the CAMEL-Subscription-Information of terminal described in core network control surface functional inquiry；

The core network control surface function judges whether to need to use access network node granularity for terminal according to the CAMEL-Subscription-Information Aggregating tunnel.

A kind of 13. access network nodes, it is characterised in that including：

Receiver module, for being if desired aggregating tunnel of the terminal using the access network node granularity, in core network control After session connection between face function processed and core network user face function is set up, received for distinguishing from core network control surface function The terminal iidentification of the terminal connection；

First mapping block, for according to the terminal iidentification, the tunnel information of aggregating tunnel and the access network node towards The information of the downlink transfer passage of terminal, sets up the mapping relations of downstream transmission；

14. access network nodes according to claim 13, it is characterised in that first judge module includes：

First judging unit, for selecting auxiliary information to judge whether to need to use access network node for terminal according to the tunnel The aggregating tunnel of granularity.

15. access network nodes according to claim 13, it is characterised in that the receiver module includes：

First transmitting element, for the access network node aggregating tunnel opposite end core network user sent to core network control surface function The mark of face function；

Or

Second transmitting element, the mark for sending terminal type and access network node to core network control surface function, Huo Zhexiang Core network control surface function sends terminal type；

16. access network nodes according to claim 13, it is characterised in that the terminal iidentification is one for representing terminal Connection label information, it by core network control surface function is terminal distribution that the label information is, core network control surface passes through User plane sets up request message and the label information is passed into core network user face function.

17. access network nodes according to claim 13, it is characterised in that if upstream data bag is transmitted to the access network During node, the access network node also includes：

Upstream data bag transport module, if only supporting aggregating tunnel mechanism for the access network node, by upstream data bag with The aggregating tunnel of access network node granularity is mapped, and upstream data is forwarded a packet into corresponding core network user face function；Or Person

If the access network node supports aggregating tunnel mechanism and other tunneling mechanisms, by wireless transfer channel mark and tunnel mark Knowledge is mapped, and the upstream data is forwarded a packet into corresponding core network user face function.

18. according to claim 13 access network node, it is characterised in that if downlink data packet pass through access network node granularity Aggregating tunnel transmit during to the access network node, the access network node also includes：

Downstream packet transmission module, for the mapping relations according to the terminal iidentification and downlink transfer passage, under described Row packet is transmitted to the terminal.

19. access network nodes according to claim 13, it is characterised in that if the terminal iidentification is empty IP address, institute Stating access network node also includes：

Second mapping block, closes for the mapping by recognizing IP address and downlink transfer passage that dhcp message sets up terminal System.

A kind of 20. core network control surface functions, it is characterised in that including：

First determining module, for when it is determined that needing to use the aggregating tunnel of access network node granularity for terminal, it is determined that to eventually Hold the terminal iidentification of distribution；

Second sending module, the terminal iidentification for sending the terminal to access network node, so that access network node is according to end The information of the downlink transfer passage of end mark, tunnel information and access network node terminaloriented, sets up the mapping of downstream transmission Relation.

21. core network control surface functions according to claim 20, it is characterised in that the first determining module includes：

First determining unit, for the mark according to access network node aggregating tunnel opposite end core network user face function, determines phase The core network user function of answering；

First allocation unit, for being the terminal distribution IP from the IP address pond corresponding to the function of the core network user face Address；

Or

Second determining unit, for the mark according to terminal type and access network node, it is determined that corresponding core network user face work( Energy；

3rd judging unit, the label of the connection for judging whether to need to be used to represent terminal for the terminal distribution one is believed Breath；

Second allocation unit, the label information of the connection for if desired being used to represent terminal for the terminal distribution one, and User plane is set up in message and for the label information to be sent to core network user face, is believed the label by core network control surface function Breath is sent to the access network node.

A kind of 22. core network control surface functions, it is characterised in that including：

Second judge module, for providing tunnel selection auxiliary information to core network control surface function in terminal or not providing tunnel During selection auxiliary information, judge whether the aggregating tunnel for needing to use access network node granularity for terminal；

Second determining module, for being if desired aggregating tunnel of the terminal using the access network node granularity, it is determined that with In the terminal iidentification for distinguishing the terminal connection；

3rd sending module, the terminal iidentification for sending the terminal to access network node, so that access network node is according to end The information of the downlink transfer passage of end mark, tunnel information and access network node terminaloriented, sets up the mapping of downstream transmission Relation.

23. core network control surface functions according to claim 22, it is characterised in that second judge module includes：

Query unit, selects for providing tunnel selection auxiliary information to core network control surface function or not providing tunnel in terminal During auxiliary information, the CAMEL-Subscription-Information of the terminal is inquired about；

4th judging unit, for judging whether to need according to the CAMEL-Subscription-Information to use the poly- of access network node granularity for terminal Close tunnel.