CN102625305B - Access the method and system of evolved packet system - Google Patents
Access the method and system of evolved packet system Download PDFInfo
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- CN102625305B CN102625305B CN201110033382.4A CN201110033382A CN102625305B CN 102625305 B CN102625305 B CN 102625305B CN 201110033382 A CN201110033382 A CN 201110033382A CN 102625305 B CN102625305 B CN 102625305B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
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- H04W12/069—Authentication using certificates or pre-shared keys
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Abstract
The invention discloses a kind of method for accessing evolved packet system, including：UE sends the certification message that the user based on 3GPP accesses by local gateway using non-3 GPP access gateway and non-3 GPP access network aaa server as the agent network element of certification to non-3 GPP access gateway；Non-3 GPP access gateway sets up binding relationship after being subject to certification message trigger to the P GW of evolved packet system EPS；The IP address that P GW will be distributed for UE notifies that the IP address that P GW are distributed is sent to local gateway by trusted non-3 gpp gateway, trusted non-3 gpp gateway by certification message；The IP address that local gateway distributes P GW notifies UE, or, local gateway is that UE distributes local ip address, and local ip address is notified into UE.The invention also discloses a kind of system of the access evolved packet system for realizing the above method.The present invention has expanded the access capability of UE, for UE user provides plurality of access modes.
Description
Technical field
Pass through the non-third generation partner program of trusted (3GPP, 3rd Generation the present invention relates to one kind
Partnership Project) network insertion to evolved packet system (EPS, Evolved Packet Core) technology, especially
It is related to a kind of user equipment (UE, User Equipment) pass through trusted non-3 GPP network such as WLAN (WLAN,
Wireless Local Area Network) etc. access evolved packet system method and system.
Background technology
The EPS of 3GPP by evolution Universal Terrestrial Radio Access Network (E-UTRAN, Evolved Universal
Terrestrial Radio Access Network), mobile management unit (MME, Mobility Management
Entity), gateway (S-GW, Serving Gateway), grouped data network gateway (P-GW, Packet Data
Network Gateway) and home subscriber server (HSS, Home Subscriber Server) composition.
EPS supports the intercommunication with non-3 GPP system, and Fig. 1 is UE by non-3 GPP network access mobile core net trusty
The Organization Chart of network, as shown in Figure 1.Wherein, the intercommunication with non-3 GPP system realized by S2a/S2b/S2c interfaces, P-GW conducts
Anchor point between 3GPP and non-3 GPP system.In the system architecture diagram of EPS, non-3 GPP system is accessed and is divided into trustless non-
3GPP is accessed and trusted non-3 GPP access；Wherein, trustless non-3 GPP access need to be by the packet data gateway of evolution
(ePDG, Evolved Packet Data Gateway) is connected with P-GW, and the interface between ePDG and P-GW is S2b；Trusted is non-
3GPP is accessed and directly can be connected with P-GW by S2a interfaces, and S2a interfaces carry out information exchange using PMIP/GTP；In addition, S2c
Interface provides the related control of user plane between UE and P-GW and mobility support, and mobility management protocol of its support is
Support mobile IP v 6 (DSMIPv6, Mobile IPv6Support for Dual Stack the Hosts and of double stacks
Routers), it can be used for trustless non-3 gpp and trusted non-3 GPP access.
WLAN (WLAN, Wireless Local Area Network) can connect as trusted non-3 gpp
Enter EPS.Because wlan network has two kinds of networking models in itself, respectively home gateway (RG, Residential Gateway) is
Bridge mode and RG are route pattern, so, when WLAN is from EPS intercommunications, it is necessary to consider that different networking models are mutual with EPS respectively
Logical technical requirements.
Wherein, when RG is bridge mode, wideband network gateway (BNG, Broadband Network Gateway)/broadband
Net RAS (BRAS, Broadband Remote Access Server) need support proxy-mobile IP (PMIP,
Proxy Mobile IP)/GPRS Tunnel Protocol (GTP, GPRS Tunneling Protocol), and can be by mobile network
The address of UE distribution returns to UE, and under this scene, how UE is used as non-3 GPP access network trusty by fixed network is linked into
Evolved packet system (EPS, Evolved Packet System) EPC, has been carried out at present.
Fig. 2 is the Organization Chart that UE is linked into mobile core network by fixed network, as shown in Fig. 2 when RG is route pattern, UE
When accessing fixed network services, flow is comprised the concrete steps that：First, BNG/BRAS is the IP address that RG distributes fixed network, i.e. user terminal sets
Standby (CPE, Customer Premise Equipment) address, then RG as DHCP (DHCP,
Dynamic Host Configuration Protocol) Server, by dhcp message, is that UE distributes an IP address (
As be private address), UE is obtained after the IP address, you can with by BNG/BRAS access fixed network services, wherein, RG is served
Network address translation (NAT, Network Address Translation) function.But, if UE is accessed by WLAN moved
If core network, the existing message mechanism of route pattern cannot trigger BNG/BRAS by S2a interfaces to mobile core network
PMIP/GTP message is sent, is with follow-up operation：From mobile core network obtain its be UE distribution IP address, using the IP
The business that address accesses mobile operator offers cannot all be completed.
The content of the invention
In view of this, it is a primary object of the present invention to provide a kind of method and system for accessing evolved packet system, energy
In making UE by the network insertions such as fixed network to EPS, UE to the flexibly and fast access of external network and EPS is realized.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of method for accessing evolved packet system, including：
UE using non-3 GPP access gateway and non-3 GPP access network aaa server as the agent network element of certification, with LAN
Close and initiate the certification that the user based on 3GPP accesses as certification direction EPS systems；
The non-3 GPP access gateway is subject to the P-GW that certification triggers backward EPS to set up binding relationship；
The P-GW will notify the trusted non-3 gpp gateway for the IP address for UE distribution, and the trusted is non-
The IP address that the P-GW is distributed is sent to the local gateway by 3GPP gateways by certification message；
The IP address that the P-GW is distributed is notified the UE by the local gateway, or, the local gateway is described
UE distributes local ip address, and the local ip address is notified into the UE.
Preferably, methods described also includes：
The IP address and/or the local ip address that the UE is distributed by the P-GW carry out Operational Visit.
Preferably, connection is set up based on peer-peer protocol PPP between the UE and the local gateway.
Preferably, when the local gateway is that the UE distributes local ip address, methods described also includes：
The local gateway sets the mapping relations of the IP address that the local ip address is distributed with the P-GW and stores.
Preferably, the IP address and/or the local ip address that the UE is distributed by the P-GW carry out Operational Visit
Specially：
When the IP address that the UE distributes the P-GW is as the address of access service, packet is sent to by EPS
External network；
Or, the local gateway receives the packet of IP address that the UE distributed with the P-GW as source address
Afterwards, outside is sent to by non-3 GPP access network after the IP address that the P-GW is distributed being replaced by into CPE addresses according to local policy
Network；
Or, after the local gateway receives packets of the UE with the local ip address as source address, according to
Local policy is sent to external network by non-3 GPP access network, or the source address in the packet is replaced by into the P-GW
The IP address of distribution is simultaneously sent to external network by the EPS.
Preferably, the local gateway is home gateway RG, and described non-3 GPP access gateway is：Wideband network gateway
BNG/ broadband networks RASs BRAS.
Preferably, after the BNG/BRAS is subject to the triggering of certification success message, initiates strategy session and set up；The strategy
Session includes the fixed network strategy session between the BNG/BRAS and BPCF, and, the S9* between the BPCF and the PCRF
Session.
Preferably, the binding relationship is：
When being connected based on PMIP between the BNG/BRAS and the P-GW, the BNG/BRAS sends out by the P-GW
PBU message is sent to initiate to set up PMIP tunnel binding；
When being connected based on GTP between the BNG/BRAS and the P-GW, the BNG/BRAS sends to the P-GW and creates
Conversation request message is built to initiate to set up GTP tunnel binding.
A kind of system for accessing evolved packet system, the system includes：UE, non-3 GPP access network, EPS, non-3 gpp connect
Networking includes local gateway, aaa server and non-3 GPP access gateway；EPS includes P-GW；Non-3 GPP access network passes through non-3 gpp
Access gateway is connected with EPS；Wherein,
UE, for using non-third generation partner program 3GPP access gatewaies and non-3 GPP access network aaa server as
The agent network element of certification, initiates the user based on 3GPP and accesses using local gateway as certification direction evolved packet system EPS systems
Certification；
The non-3 GPP access gateway, for setting up binding relationship to the P-GW of EPS after being triggered by certification；And,
After P-GW is received for the IP address of UE distribution, the IP address that the P-GW is distributed is sent to described by certification message
Ground gateway；
The P-GW, for the trusted non-3 gpp gateway will to be notified for the IP address for UE distribution；
The local gateway, for the IP address that the P-GW is distributed to be notified into the UE, or, for being the UE
Distribution local ip address, and the local ip address is notified into the UE.
Preferably, the UE is additionally operable to the IP address distributed by the P-GW and/or the local ip address enters industry
Business is accessed；
Connection is set up based on PPP between the UE and the local gateway.
Preferably, when the local gateway is that the UE distributes local ip address, the local gateway is additionally operable to set institute
State the mapping relations of the IP address that local ip address is distributed with the P-GW and store.
Preferably, when the IP address that the UE distributes the P-GW is as the address of access service, packet is by EPS
It is sent to external network；
Or, the local gateway receives the packet of IP address that the UE distributed with the P-GW as source address
Afterwards, outside is sent to by non-3 GPP access network after the IP address that the P-GW is distributed being replaced by into CPE addresses according to local policy
Network；
Or, after the local gateway receives packets of the UE with the local ip address as source address, according to
Local policy is sent to external network by non-3 GPP access network, or the source address in the packet is replaced by into the P-GW
The IP address of distribution is simultaneously sent to external network by the EPS..
Preferably, the local gateway is home gateway RG, and described non-3 GPP access gateway is：BNG/BRAS.
In the present invention, when realizing being linked into EPS by fixed networks such as WLAN by UE, first by the gateway of fixed network to EPS's
HSS/AAA is authenticated, and after certification passes through, EPS can be that UE distributes an IP address that can be linked into EPS.UE is initiating to connect
Fashionable, fixed network gateway can make access judgement according to the source address information in the business of UE, and current business is directly connected to
External network is linked into external network by EPS, wherein, it is UE distribution when EPS is carried in the service access request of UE
During IP address, UE can be typically linked into EPS by fixed network gateway, and when carrying the local ip address that fixed network is distributed for UE, can be by UE
It is linked into outer net.The present invention is realized and is linked into EPS by fixed network, and optional access network is provided for UE, facilitates UE
User can also realize being linked into EPS and realizing carrying out the business such as converse with mobile network user by LANs such as fixed networks.This
The technical scheme of invention realizes merging for fixed network and EPS well, has expanded the access capability of UE, for UE user provide it is many
Plant access way.
Brief description of the drawings
Fig. 1 is Organization Charts of the UE by non-3 GPP network access mobile core network trusty；
Fig. 2 is the Organization Chart that UE is linked into mobile core network by fixed network；
Fig. 3 is the flow chart of the method that the present invention accesses evolved packet system.
Specific embodiment
It is by the following examples and referring to the drawings, right to make the object, technical solutions and advantages of the present invention become more apparent
The present invention is described in further detail.
In the present invention, RG is referred to as local gateway, and BNG/BRAS is referred to as non-3 GPP access gateway.
Fig. 3 is the flow chart of the method that the present invention accesses evolved packet system, as shown in figure 3, this present invention accesses evolution
The method of grouping system is RG under route pattern, used as non 3GPP networks trusty, mobile UE passes through S2a interfaces to WLAN
The scene of access mobile core net (EPC), wherein S2a interfaces use PMIP interfaces or GTP interfaces.Wherein, fixed network and
Mobile network (EPS) is respectively UE and distributes an IP address, or only by mobile network, (EPS is that UE distributes IP address.In UE
It is middle to preserve two or an IP address.Optionally DHCP protocol is used between RG and BNG/BRAS.The present invention accesses evolution point
The method of system system specifically includes following steps：
Step S301, carries out peer-peer protocol (PPP, Point-to-Point Protocol) between RG and BNG/BRAS
Consult and verification process, during ppp negotiation, BNG/BRAS be RG distribute local ip address, i.e., ustomer premises access equipment (CPE,
Customer Premises Equipment)IP。
Step S302, carries out DHCP negotiations processes between UE and RG, in DHCP negotiations processes, RG is that UE distributes an IP
Address, generally private network IP, are referred to as IP2 in the present invention.
The step of the above two is all the operation just supported in existing network, therefore without be strengthened network (upgrading
Deng).In the present invention, if UE is not from the demand of WLAN by-pass shunts, step S302 can be omitted, and not performed.If
UE only realizes the access to EPS by fixed network such as WLAN etc., then need not perform step S302, i.e., need not access outer by fixed network
During portion's network, it is not necessary to perform step S302.
Step S303, carries out PPP LCP negotiations, and selected authentication mode between UE and RG.Because 3GPP regulations access EPC
Non-3 GPP access network need to use EAP authentication, this LCP negotiation in select authentication mode be EAP authentication.
Step S304, RG, BNG/BRAS as EAP authentication agency (proxy), BBF AAA also serve as the generation of EAP authentication
Reason, UE is accessed with mobile network (user in EPS) identity by fixed network, and is accomplished to the Certificate Authority of 3GPP HSS/AAA, is recognized
Card mode is EAP.
Step S305, HSS/AAA send the successful response message of EAP authentication to BPCF, and BPCF should to BNG/BRAS forwardings
Certification success message.
Step S306, BNG/BRAS are triggered by certification success message, are initiated strategy session and are set up.Wherein strategy session
Including the fixed network strategy session between BNG/BRAS and BPCF, the S9* sessions between BPCF and PCRF.The step is in different fields
Scape can be performed or omitted.It is specific to need according to being also based on GTP connections based on PMIP connections between BNG/BRAS and P-GW
Determine whether to omit the step, if connected based on PMIP between BNG/BRAS and P-GW, the step is essential step；If
Connected based on GTP between BNG/BRAS and P-GW, the step can be omitted.
Step S307, BNG/BRAS are triggered by certification success message, and tunnel binding is asked to P-GW.
If the S2a interfaces between BNG/BRAS and P-GW are the interfaces based on PMIP, BNG/BRAS sends to P-GW
PBU message；If the S2a interfaces between BNG/BRAS and P-GW are the interfaces based on GTP, BNG/BRAS sends to P-GW and creates
Build conversation request message.
Wherein above-mentioned tunnel binding request message includes：APN (APN, Access Point Name), state
The information such as border mobile identification number (IMSI, International Mobile Subscriber Identity), with to P-
GW IP address requestings are distributed.
After step S308, P-GW receive PBU message or create conversation request message, IP- is carried out between meeting and PCRF
The foundation of CAN sessions.
Step S309, P-GW carry out the renewal of P-GW marks to HSS.
Step S310, P-GW reply the establishment conversational response message of PBA or GTP to BNG/BRAS, and P- is carried in the message
GW is the IP address of UE distribution, referred to as IP1.
Step S311, BNG/BRAS is received after PBA/ establishment conversational response message, from message after acquisition IP1,
RG is sent to by EAP authentication success message.
RG sends certification success message to UE, wherein can carry address ip 1 in the certification success message, it is also possible to do not take
Band address ip 1.Here, if RG does not carry IP1 in sending certification success message to UE, the IP1 information can be stored in RG, and
The IP address of private network, referred to herein as IP3 can be distributed to UE, and the mapping relations between IP3 and IP1 are set.Certainly, aforesaid operations
Can also be carried out in BNG/BRAS, i.e. BNG/BRAS is that UE distributes the IP3 of private network, and sets the mapping between IP3 and IP1
(Mapping) relation, UE is sent to by the IP3 information by RG.Its implementation and RG store IP1 and set IP3 and IP1 it
Between mapping relations it is essentially identical.It will be appreciated by those skilled in the art that above-mentioned realize only as to technical solution of the present invention
The supplement for carrying out, is not intended to limit the present invention.
Step S312 to step S313, RG obtain IP1 addresses.And IP1 addresses are sent to by UE by PPP ipcp negotiations,
Or, IP3 addresses corresponding with IP1 are sent to UE.
Wherein, RG obtain address ip 1 after, can first store the address, wait UE ask ipcp negotiation after again by the address ip 1
It is sent to UE；Or RG stores the address, and it is that UE distributes an IP3 for private network after UE request ipcp negotiations, is tieed up on RG
The mapping relations of IP1 and IP3 are protected, and IP3 addresses are sent to by UE by IPCP message.Accordingly said in step S311
It is bright.
Step S314, the strategy for updating if necessary, then PCRF can trigger itself with BPCF, BNG/BRAS and BPCF it
Between can carry out policy update operation.
Step S315, UE can carry out data transmission, specifically according to the distributing strategy from network side/be locally configured acquisition
It is as follows：
A) streamed data (referring specifically to step S315)：If UE obtains IP2 addresses, UE can select to use IP2 addresses
With PERCOM peripheral communication, such data can by BNG/BRAS directly with outer net interconnecting.If that is, UE selection IP2 addresses are made
For source address carries out Operational Visit, then fixed network gateway will make UE pass through BNG/BRAS directly with outer net interconnecting, that is, realize fixed network
General service is accessed.
B) data accessed from mobile network (EPS) (referring specifically to step S316)：When UE judges the business datum needs
If being accessed by mobile network, then it is IP1 that UE can fill out the IP source address of the service message, and destination address is real for message
Destination address；The equipment of RG, BNG/BRAS and mobile network carries out routing forwarding to data.That is, UE is needed
When directly accessing external network by fixed network, source address of the IP2 addresses as business is typically chosen, so as existing solid
The realized function of net is directly connected to external network；And when UE needs to access EPS, IP1 is selected as the source address of business,
So, fixed network gateway is when it is determined that the source address of business is IP1, it will UE is linked into EPS.
If that UE is obtained is IP3, it is IP3 that UE can fill out the IP source address of the business, and destination address is true for message
Positive destination address；RG, according to the mapping table of the local IP1 for preserving and IP3, changes the IP sources of message after the message is received
Address is IP1, then carries out routing forwarding.That is, when UE only obtains IP3 addresses, now can only realize EPS
Access.
Step 316：The equipment of RG, BNG/BRAS and mobile network carries out routing forwarding to data.
In the present invention, if UE does not obtain IP2 addresses in step S302, and IP3 ground is only obtained in step S313
Location, it is also possible to realize data distribution.At this moment corresponding distributing strategy can be configured in RG, when UE is with IP3 and outbound communication, RG
Which IP stream outer net can be directly connected to from BNG/BRAS according to strategy decision, the address ip 3 that this part IP flows is replaced by
Be the CPE addresses (upstream does inverse operation for downstream) that RG is distributed by BNG/BRAS, i.e., typical NAT operations；For RG
Decision needs the IP that access mobile core net (EPS) route to flow, and is that IP1 addresses are (up by the IP3 address substitutions of corresponding data bag
Stream, inverse operation is done for downstream), you can realization is linked into EPS.Here, distributing strategy can be true according to the type of business
Making should be directly accessed outer net and still access EPS, such as setting the business of type, only have access EPS, and for the setting
Business outside type, accesses EPS or outer net.For example, it is also possible to the destination address according to business makes corresponding access
Measuring shunt, for example, the address information in destination address is when setting the address in list, business only has access EPS, no
Then, business can be linked into EPS or outer net.
Certainly, as a kind of feasible implementation, the action that above-mentioned RG is performed, it is also possible to by BNG/BRAS replacement RG
Realize.
Hereinafter, by specific application examples, the essence of technical scheme that the present invention is furture elucidated.
Application examples one
In the present embodiment, by the flow shown in Fig. 3, UE obtains an IP address IP1 (not performing step S302).
In step 312 and step 313, IP1 addresses are directly sent to UE by RG, do not have IP3 addresses.Remaining flow with above-mentioned diagram
Flow is identical, and its details is repeated no more here.
UE obtains IP1 addresses, is communicated with external network (being accessed by EPS).For upstream data, the encapsulation of packet
Form is as shown in table 1 below：
| Source IP：IP1 | Purpose IP | Data message |
Table 1
All it is this form when packet is by RG, BNG/BRAS, RG and BNG/BRAS only does general routing function.For
Downstream data flow, source address and destination address are exchanged.If that is, UE only obtains IP1 addresses, only carrying out connecing for EPS
Enter.
If having formulated corresponding distributing strategy on RG, although i.e. UE only obtains IP1 addresses, formulate corresponding on RG
Distributing strategy.So, as shown in Table 1 above, and packet has been arrived after RG UE encapsulated data packets, source IPs of the RG to packet
Address is modified or is not changed, specifically, during modification, it is as shown in table 2 below：
Table 2
Specifically, when RG is according to distributing strategy, when determining that current service data bag need to be sent to outer net, it will will be received
Packet as shown in table 1 be revised as structure as shown in table 2.RG determines that current service data bag is needed according to distributing strategy
When being sent to EPS, packet as shown in table 1 will not be modified, but be transmitted directly to BNG/BRAS.
After packet has arrived BNG/BRAS, if BNG/BRAS has found that the source address of packet is CPE addresses, BNG/
The packet is directly routed to outer net by BRAS, if BNG/BRAS has found that the source address of packet is IP1, by the packet
The tunnel of S2a interfaces is enclosed, P-GW is issued.For downstream data flow, address substitution does above-mentioned inverse operation, here no longer
Repeat it and realize details, it will be appreciated by those skilled in the art that realizing that above-mentioned inverse operation is easily to realize.
Application examples two
In the present embodiment, by the flow shown in Fig. 3, UE obtains two IP address：IP2 and IP3.In the present embodiment
In, above-mentioned flow includes step S302.In step S312 and step S313, RG by IP1 address of cache be IP3 after be sent to UE,
IP1 addresses terminate in RG.
UE obtains IP2 addresses, and when being communicated with external network, for upstream data, the encapsulation format of packet is such as
Shown in table 4：
| Source IP：IP2 | Purpose IP | Data message |
Table 3
When packet is by RG, RG performs nat feature, is CPE addresses by IP2 address substitutions, as shown in upper table 2.It is this
In the case of, BNG/BRAS is to perform general routing function, routes a data packet to outer net.For downstream data flow, address is more
Change and do above-mentioned inverse operation, it is repeated no more here and realizes details, it will be appreciated by those skilled in the art that realizing above-mentioned inverse
Operation is easily to realize.
UE obtains IP3 addresses, and UE is communicated by mobile core network with the IP address with outer net (EPS).UE encapsulation of data
The form of bag is as shown in table 4：
| Source IP：IP3 | Purpose IP | Data message |
Table 4
After packet reaches RG, the source address IP3 address substitutions in RG packets are IP1, as shown in Table 1.Packet
After having arrived BNG/BRAS, BNG/BRAS has found that the source address of packet is IP1, then the packet is enclosed the tunnel of S2a interfaces,
Issue P-GW.For downstream data flow, address substitution does above-mentioned inverse operation, it is repeated no more here and realizes details, this
Art personnel should be appreciated that and realize that above-mentioned inverse operation is easily to realize.
Application examples three
In the present embodiment, by the flow shown in Fig. 3, UE obtains two IP address：IP2 and IP1.Its operating process is joined
See flow chart 3.In the present embodiment, above-mentioned flow includes step S302.In step S312 and step S313, RG is straight by IP1
UE is given in sending and receiving.
UE obtains IP2 addresses, when being communicated with external network, (passes through because the partial data belongs to streamed data
Fixed network directly accesses external network).For upstream data, the encapsulation format of packet is as shown in table 3.When packet is by RG,
RG performs nat feature, is CPE addresses by IP2 address substitutions, as shown in table 2.BNG/BRAS only does general routing function, by number
Outer net is routed to according to bag.For downstream data flow, address substitution makees above-mentioned inverse operation.
UE obtains IP1 addresses, if necessary to business data packet is sent into EPS (accessing EPS), then for upper line number
According to, the form such as table of UE encapsulated data packets, packet is all this form by RG, BNG/BRAS, and BNG/BRAS receives data
The source address that packet is found after bag is IP1, then the packet is enclosed the tunnel of S2a interfaces, issues P-GW.For lower line number
According to stream, inverse operation is performed.
Application examples four
In above-mentioned application examples two, RG has done the mapping of IP1 addresses and IP3 addresses, is realized as one kind supplement, the function
Can be realized by BNG/BRAS.After i.e. IP1 addresses reach BNG/BRAS by P-GW, BNG/BRAS distributes an IP3 address, and will
Address hair supply UE.The corresponding relation of IP1 and IP3 is maintained on BNG/BRAS, when the packet of up-downgoing is by BNG/
During BRAS, BNG/BRAS does IP address and changes according to the encapsulation that the corresponding relation of IP1 and IP3 does packet, can equally realize
Above-mentioned functions.
The present invention also describes a kind of system for accessing evolved packet system, including：UE, non-3 GPP access network, EPS are non-
3GPP access networks include local gateway, aaa server and non-3 GPP access gateway；EPS includes P-GW；Non-3 GPP access network passes through
Non-3 GPP access gateway is connected with EPS；Wherein,
UE, for using non-third generation partner program 3GPP access gatewaies and non-3 GPP access network aaa server as
The agent network element of certification, initiates the user based on 3GPP and accesses using local gateway as certification direction evolved packet system EPS systems
Certification；
The non-3 GPP access gateway, for setting up binding relationship to the P-GW of EPS after being triggered by certification；And,
After P-GW is received for the IP address of UE distribution, the IP address that the P-GW is distributed is sent to described by certification message
Ground gateway；
The P-GW, for the trusted non-3 gpp gateway will to be notified for the IP address for UE distribution；
The local gateway, for the IP address that the P-GW is distributed to be notified into the UE, or, for being the UE
Distribution local ip address, and the local ip address is notified into the UE.
It should be noted that the system for accessing evolved packet system of the invention, mainly realizes melting for fixed network and EPS
Close, i.e., the access to EPS how is realized by fixed network.Therefore, the system for accessing evolved packet system of the invention, network structure
And the network element of the above-mentioned network structure of composition, all it is identical with existing network structure and existing network element, its main distinction exists
In the function that above-mentioned each network element is realized is different with existing network element, also, above-mentioned each network element is to the mode of Message Processing
Also it is different.Below, mainly the difference in functionality realized with existing network element will be described.
When the IP address that the UE distributes the P-GW is as the address of access service, packet is sent to by EPS
External network；
Or, the local gateway receives the packet of IP address that the UE distributed with the P-GW as source address
Afterwards, outside is sent to by non-3 GPP access network after the IP address that the P-GW is distributed being replaced by into CPE addresses according to local policy
Network；
Or, after the local gateway receives packets of the UE with the local ip address as source address, according to
Local policy is sent to external network by non-3 GPP access network, or the source address in the packet is replaced by into the P-GW
The IP address of distribution is simultaneously sent to external network by the EPS.
Above-mentioned trusted non-3 gpp gateway includes RG, and BNG/BRAS；The RG is by the BNG/BRAS and outside
Network or the EPS are connected.
Above-mentioned UE is additionally operable to,
The authentication mode for being based on 3GPP by the trusted non-3 gpp gateway is authenticated to the HSS/AAA of the EPS；
The BNG/BRAS is additionally operable to, after being successfully triggered by the certification of the EPS, to the grouped data of the EPS
Network gateway P-GW asks tunnel binding；And receive the IP address of the EPS distribution from the P-GW.
It will be appreciated by those skilled in the art that above-mentioned network structure can be found in the network structure and Fig. 3 of existing protocol
Interaction flow between shown each network element and understand.As long as above-mentioned technical proposal of the invention can be realized, do not limit specific
Realize structure.The function achieved by each network element in system of the invention, for details, reference can be made to each network element shown in earlier figures 3
Between interaction flow and understand.
The above, only presently preferred embodiments of the present invention is not intended to limit the scope of the present invention.
Claims (13)
1. it is a kind of access evolved packet system method, it is characterised in that methods described includes：
When local gateway is route pattern, when user equipment (UE) is by non-3 GPP network access mobile core network trusty,
The UE is made with non-third generation partner program 3GPP access gatewaies and non-3 GPP access network authentication charging aaa server
It is the agent network element of certification, the use based on 3GPP is initiated as certification direction evolved packet system EPS systems using the local gateway
The certification that family is accessed；
The non-3 GPP access gateway is subject to the P-GW that certification triggers backward EPS to set up binding relationship；
The IP address that the P-GW will be distributed for the UE notifies that trusted non-3 gpp gateway, the trusted non-3 gpp gateway lead to
Cross certification message and the IP address that the P-GW is distributed is sent to the local gateway；
The IP address that the P-GW is distributed is notified the UE by the local gateway, or, the local gateway is the UE points
With local ip address, and the local ip address is notified into the UE.
2. method according to claim 1, it is characterised in that methods described also includes：
The IP address and/or the local ip address that the UE is distributed by the P-GW carry out Operational Visit.
3. method according to claim 1, it is characterised in that assisted based on point-to-point between the UE and the local gateway
View PPP sets up connection.
4. method according to claim 1, it is characterised in that the local gateway is that the UE distributes local ip address
When, methods described also includes：
The local gateway sets the mapping relations of the IP address that the local ip address is distributed with the P-GW and stores.
5. method according to claim 2, it is characterised in that IP address that the UE is distributed by the P-GW and/or
The local ip address carries out Operational Visit and is specially：
When the IP address that the UE distributes the P-GW is as the address of access service, packet is sent to outside by EPS
Network；
Or, after the local gateway receives the packet of IP address that the UE distributed with the P-GW as source address, root
External network is sent to by non-3 GPP access network after the IP address that the P-GW is distributed is replaced by into CPE addresses according to local policy；
Or, after the local gateway receives packets of the UE with the local ip address as source address, according to local
Strategy is sent to external network by non-3 GPP access network, or the source address in the packet is replaced by into the P-GW distribution
IP address and sent to external network by the EPS.
6. the method according to any one of claim 1 to 5, it is characterised in that the local gateway is home gateway RG, institute
The non-3 GPP access gateway stated is：Wideband network gateway BNG/ broadband networks RASs BRAS.
7. method according to claim 6, it is characterised in that the BNG/BRAS is triggered by certification success message
Afterwards, strategy session is initiated to set up；The strategy session includes the fixed network strategy session between the BNG/BRAS and BPCF, with
And, the S9* sessions between the BPCF and PCRF.
8. method according to claim 1, it is characterised in that the binding relationship is：
It is described when being connected based on PMIP between wideband network gateway BNG/ broadband networks RAS BRAS and the P-GW
BNG/BRAS initiates to set up PMIP tunnel binding by sending PBU message to the P-GW；
When being connected based on GTP between the BNG/BRAS and the P-GW, the BNG/BRAS sends to the P-GW and creates meeting
Words request message is initiated to set up GTP tunnel binding.
9. it is a kind of access evolved packet system system, it is characterised in that the system includes：UE, non-3 GPP access network, EPS,
Non-3 GPP access network includes local gateway, aaa server and non-3 GPP access gateway；EPS includes P-GW；Non-3 GPP access Netcom
Non-3 GPP access gateway is crossed to be connected with EPS；Wherein,
UE, for being route pattern when local gateway, during by non-3 GPP network access mobile core network trusty, with non-
Third generation partner program 3GPP access gatewaies and non-3 GPP access network aaa server as certification agent network element, with institute
State local gateway and initiate the certification that the user based on 3GPP accesses as certification direction evolved packet system EPS systems；
The non-3 GPP access gateway, for setting up binding relationship to the P-GW of EPS after being triggered by certification；And, connecing
After P-GW is received for the IP address of UE distribution, the IP address that the P-GW is distributed is sent to by the LAN by certification message
Close；
The P-GW, the IP address for will be distributed for the UE notifies trusted non-3 gpp gateway；
The local gateway, for the IP address that the P-GW is distributed to be notified into the UE, or, for distributing this for the UE
Ground IP address, and the local ip address is notified into the UE.
10. system according to claim 9, it is characterised in that the UE is additionally operable to the IP ground distributed by the P-GW
Location and/or the local ip address carry out Operational Visit；
Connection is set up based on PPP between the UE and the local gateway.
11. systems according to claim 9, it is characterised in that the local gateway is that the UE distributes local ip address
When, the local gateway is additionally operable to set the mapping relations of the IP address that the local ip address is distributed with the P-GW and deposit
Storage.
12. systems according to claim 10, it is characterised in that the IP address that the UE distributes the P-GW is used as visit
When asking the address of business, packet is sent to external network by EPS；
Or, after the local gateway receives the packet of IP address that the UE distributed with the P-GW as source address, root
External network is sent to by non-3 GPP access network after the IP address that the P-GW is distributed is replaced by into CPE addresses according to local policy；
Or, after the local gateway receives packets of the UE with the local ip address as source address, according to local
Strategy is sent to external network by non-3 GPP access network, or the source address in the packet is replaced by into the P-GW distribution
IP address and sent to external network by the EPS.
13. system according to any one of claim 9 to 12, it is characterised in that the local gateway is home gateway RG,
Described non-3 GPP access gateway is：Wideband network gateway BNG/ broadband networks RASs BRAS.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110033382.4A CN102625305B (en) | 2011-01-30 | 2011-01-30 | Access the method and system of evolved packet system |
| PCT/CN2011/084314 WO2012100611A1 (en) | 2011-01-30 | 2011-12-21 | Method and system for accessing evolved packet system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110033382.4A CN102625305B (en) | 2011-01-30 | 2011-01-30 | Access the method and system of evolved packet system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102625305A CN102625305A (en) | 2012-08-01 |
| CN102625305B true CN102625305B (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110033382.4A Expired - Fee Related CN102625305B (en) | 2011-01-30 | 2011-01-30 | Access the method and system of evolved packet system |
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| Country | Link |
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| CN (1) | CN102625305B (en) |
| WO (1) | WO2012100611A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103686846B (en) * | 2012-09-07 | 2019-04-05 | 中兴通讯股份有限公司 | Data message transmission method, PDN connection identifier processing method and device |
| CN103906055B (en) * | 2012-12-24 | 2017-12-26 | 中兴通讯股份有限公司 | Business datum shunt method and system |
| WO2016183745A1 (en) * | 2015-05-15 | 2016-11-24 | 华为技术有限公司 | Method and apparatus for establishing connection |
| CN108737580B (en) * | 2017-04-13 | 2021-05-07 | 电信科学技术研究院 | IP address configuration method and device |
| CN109788578B (en) * | 2017-11-14 | 2020-11-24 | 北京佰才邦技术有限公司 | LTE and WIFI aggregation method, network equipment and terminal equipment |
| CN108616612B (en) * | 2018-04-09 | 2021-11-02 | 海能达通信股份有限公司 | Downlink data transmission method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101414998B (en) * | 2007-10-15 | 2012-08-08 | 华为技术有限公司 | Communication method, system and equipment based on authentication mechanism conversion |
| CN101420792B (en) * | 2007-10-23 | 2010-07-07 | 华为技术有限公司 | Gateway anchor point distributing method, network side device and user terminal |
| CN101778446A (en) * | 2009-01-09 | 2010-07-14 | 中兴通讯股份有限公司 | Multiple access control method and device and multiple access indicating method in development grouping system |
| JP5421392B2 (en) * | 2009-01-15 | 2014-02-19 | テレフオンアクチーボラゲット エル エム エリクソン（パブル） | Support for proxy mobile IPv6 in home network |
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2011
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| WO2012100611A1 (en) | 2012-08-02 |
| CN102625305A (en) | 2012-08-01 |
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