CN102026145A - Local IP access method and system - Google Patents
Local IP access method and system Download PDFInfo
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- CN102026145A CN102026145A CN2009100925035A CN200910092503A CN102026145A CN 102026145 A CN102026145 A CN 102026145A CN 2009100925035 A CN2009100925035 A CN 2009100925035A CN 200910092503 A CN200910092503 A CN 200910092503A CN 102026145 A CN102026145 A CN 102026145A
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Abstract
The invention discloses a local internet protocol (IP) access method, which comprises that: a terminal sends an attach request message to a mobility management entity through a base station, and the mobility management entity sends an attach receiving message to the base station and indicates the base station to allocate care-of addresses for users; the base station allocates the care-of addresses for the users and sends the allocated care-of addresses and the attach receiving message to the terminal together; the terminal receives the message sent by the base station, acquires an IP address of a local home agent (L-HA) and initiates and establishes security association with the L-HA; and the terminal informs the L-HA of binding update. The invention also correspondingly discloses a local IP access system. The local IP access is realized by utilizing a mobile IP protocol, and a binding relationship between the care-of addresses of the terminal with a home address is established in the L-HA, namely the users communicate with external through the L-HA, so the service interruption caused by switching under different base stations for the users can be avoided and the user experience is improved.
Description
Technical field
The present invention relates to mobile communication technology, relate in particular to a kind of local IP access method and system.
Background technology
Third generation partner program (3rd Generation Partnership Project, 3GPP) the grouping system of evolution (Evolved Packet System, EPS) by universal mobile telecommunications system land radio access web (the Evolved Universal Terrestrial Radio Access Network of evolution, E-UTRAN), mobile management unit (Mobility Management Entity, MME), gateway (Serving Gateway, S-GW), grouped data network gateway (Packet Data Network Gateway, P-GW or PDNGW), home subscriber server (Home Subscriber Server, HSS), "Policy and Charging Rules Function (Policy and Charging Rules Function, PCRF) form by entity and other support nodes.Fig. 1 is a mobile communications network connection diagram in the prior art, as shown in Figure 1, mobile communications network comprises base station sub-system, Mobility Management Entity, core net gateway and home subscriber server in the prior art, wherein, Mobility Management Entity is responsible for the related work of chains of command such as the processing of mobile management, Non-Access Stratum signaling and the contextual management of user's mobile management; The core net gateway comprises S-GW and P-GW, and S-GW is the accessing gateway equipment that links to each other with E-UTRAN, transmits data between E-UTRAN and P-GW, and is responsible for pending datas such as paging are carried out buffer memory; P-GW then is that (Packet Data Network, the PDN) borde gateway of network are responsible for the access of PDN and transmit function such as data between EPS and PDN for EPS and packet data network.
Except the access of supporting mobile core network, mobile communication system also can be supported the local IP access function, possess in the base station under the condition of local IP access ability and the signatory permission of user local IP access, can realize that terminal inserts this locality of other IP devices of home network or the Internet.In the prior art in the mobile communications network setting up of local gateway providing powerful support for the local IP access technology can be provided, local gateway can be local SGW (Local SGW, L-SGW) and local PGW (Local PGW, L-PGW), also can be independent L-PGW, local gateway can close with the base station and establish.
For universal terrestrial access network (Universal Terrestrial Radio Access Network, UTRAN) system, the core net gateway can be Serving GPRS Support Node (Serving GPRS Support Node, SGSN), Gateway GPRS Support Node (Gateway GPRS Support Node, GGSN).Local gateway can be that (Local GGSN, L-GGSN) (Local SGSN L-SGSN), also can be independent L-GGSN to local GGSN with local SGSN.
Base station sub-system can be that the base station (eNodeB) and the global terrestrial radio of the evolution of E-UTRAN inserts (Universal Terrestrial Radio Access, UTRAN)/global system for mobile communications Radio Access Network (the GSM EDGE Radio Access Network that strengthens, GERAN) radio network controller (RNC)/base station controller (BSC), perhaps Home eNodeB (HNB/HeNB) and femto gateway (HNB GW/HeNB GW).
Home eNodeB is a kind of small-sized, lower powered base station, be deployed in indoor places such as family and office, main effect is in order higher service rate to be provided to the user and to reduce and use the needed expense of high rate services, remedying the deficiency that existing distributed cellular radio communication system covers simultaneously.The advantage of Home eNodeB is economical, convenient, low-power output, plug and play etc.Home eNodeB can be directly connected to core network, also can be linked into core network by this logical ne of femto gateway.Wherein, the major function of femto gateway is: the fail safe of checking Home eNodeB, handle the registration of Home eNodeB, and Home eNodeB is carried out operation maintenance management, according to Carrier Requirements configuration and control Home eNodeB, be responsible for the data of exchcange core net and Home eNodeB.Under the situation that has femto gateway, local gateway not only can close with Home eNodeB and establish, and also can close with femto gateway and establish, and in addition, femto gateway can also close with Home eNodeB and establish.
Under the existing network framework, when the user was connected to network, an IP address can be distributed to the user in the base station, and when the user inserted target BS, target BS can be user's distributing IP address again, thereby is easy to cause service disconnection, thereby influences user experience.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of local IP access method and system, can avoid the user to switch the service disconnection that causes under different base station, thereby improves user experience.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of local IP access method comprises:
After Mobility Management Entity sent Attach Request message, Mobility Management Entity sends to adhere to accepted message to the base station to terminal, and indicates this base station to distribute Care-of Address for the user by the base station;
Care-of Address is distributed according to the user that is designated as of Mobility Management Entity in the base station, and with the Care-of Address that distributes with adhere to and accept message and send to terminal together;
After terminal is received the message of sending the base station, obtain the IP address of local home agent L-HA, and the Security Association of initiation and foundation and L-HA;
Terminal notice L-HA carries out Binding Update, and after L-HA confirms to bind successfully, sends and adhere to success message to Mobility Management Entity.
Described terminal after Mobility Management Entity sends Attach Request message, also comprises step by the base station: Mobility Management Entity is initiated the authentication to the user, checking user legal identity.
Described terminal by the base station after Mobility Management Entity sends Attach Request message, also comprise step: described Mobility Management Entity was not registered for this user at home subscriber server HSS, described Mobility Management Entity is initiated the position to HSS and is upgraded, HSS registers this Mobility Management Entity and adheres to for this user is current, and sends the position and upgrade and confirm to Mobility Management Entity.
Describedly adhere to that to accept message be non access stratum NAS message, wherein comprise response user intention: use local IP to insert and use mobile IP, and the IP address of L-HA or global domain name FQDN;
The IP address that described terminal is obtained L-HA is: directly obtain from described NAS message; Perhaps, according to the FQDN of the L-HA in the NAS message, obtain the IP address of L-HA to domain name system server DNS inquiry; Perhaps,, or oneself construct the domain name of L-HA, obtain the IP address of L-HA to the DNS inquiry according to the IP address of own pre-configured L-HA.
This method comprises that also carrying out the user switches, and is specially:
After terminal foundation inserts the LIPA connection of external network by source base station, source base station receives the wireless signal measurement report that terminal provides, decision switches to target BS with this user, then send a handover request to the source Mobility Management Entity, carry the target BS sign in the described handoff request and distribute the Care-of Address indication;
The source Mobility Management Entity is transmitted to target BS with this handoff request by target mobility management entity;
Target BS for this terminal distribution Care-of Address, is reserved Radio Resource according to distributing the Care-of Address indication simultaneously, waits for user's switching, sends handoff response afterwards to source base station;
Source base station sends switching command to terminal, requires terminal to switch to target BS, and described switching command carries Care-of Address and the target BS sign that target BS is a terminal distribution;
The terminal wireless channel switches to target BS, sends agent binding update messages to L-HA, carries the Care-of Address that target BS is a terminal distribution in the described agent binding update messages;
L-HA upgrades the banding cache of this terminal of self preserving, and is the Care-of Address and the home address binding of terminal distribution with target BS;
L-HA sends binding acknowledgement message to terminal, and described terminal is finished and switched to target BS.
This method comprises that also the user deactivates local IP and connects, and is specially:
The local IP of terminal decision deactivation connects, and sends binding update messages to L-HA;
L-HA deletes the binding relationship of this user's Care-of Address and home address, sends binding acknowledgement message to terminal;
Terminal sends PDN and connects interrupt request message to Mobility Management Entity, notifies local IP to connect deletion;
The described subscriber's local access information that Mobility Management Entity deletion self is preserved is concurrently sent to the carrying request of living and is given the base station, and the deletion of request base station connects the radio bearer resources of setting up for local IP;
Base station deletion is connected radio bearer resources with local IP between the terminal, replys Mobility Management Entity afterwards and finishes Radio Resource and delete.
Described L-HA sends binding acknowledgement message to also comprising step after the terminal: terminal or L-HA initiate and the deletion Security Association.
This method also is included in and activates local IP connection in the service request process, is specially:
Have local IP access behind the terminal access to wireless communication system and connect, after this terminal enters Idle state;
Terminal sends service request information through new base station to new Mobility Management Entity;
Mobility Management Entity sends initial context to new base station and sets up request message, and described initial context is set up to carry in the request message and distributed the CoA indication;
New base station is carried out radio bearer and is set up process, is described terminal distribution CoA, and sets up at radio bearer and to send to UE in the process;
New base station is replied the foundation of Mobility Management Entity initial context and is finished.
Described terminal after Mobility Management Entity sends service request information, also comprises step through new base station: new Mobility Management Entity carries out authentication to terminal.
This method also is included in and activates local IP connection in the tracing section updating process, is specially:
Have local IP access behind the terminal access to wireless communication system and connect, after this terminal enters Idle state.
The terminal of Idle state regularly or moving initiating updating of tracking area flow process when causing the tracking area tabulation to change, promptly terminal sends the tracing section updating request to new base station, described tracing section updating request is a NAS message;
New Mobility Management Entity is issued for the tracing section updating request package is contained in the base station in initial user message/upstream message message transfer;
New Mobility Management Entity and former Mobility Management Entity are inequality, and new Mobility Management Entity is initiated context to former Mobility Management Entity and obtained flow process, promptly sends context request;
Former Mobility Management Entity is included in user's contextual information in the context response information, issue new Mobility Management Entity, the LIPA that carries the local IP access connection in the described context response information connects indication, uses IP address or the identity of mobile IP indication, HA;
New Mobility Management Entity is preserved the information of receiving, and responds context acknowledgement message to former Mobility Management Entity;
New Mobility Management Entity is initiated more new technological process of position to home location server;
Home location server is initiated the canceling position flow process to former Mobility Management Entity;
Mobility Management Entity sends initial context to new base station and sets up request message, sends tracing section updating simultaneously and accepts message, wherein carries the LIPA indication and the base station of will looking for novelty is indicated for this user distributes CoA;
CoA is distributed for this user in new base station, and sets up at radio bearer and to send to UE in the process;
New base station is notified new Mobility Management Entity initial context to set up and is finished, and new Mobility Management Entity transmission tracing section updating is accepted forwards to terminal.
Former Mobility Management Entity is included in user's contextual information in the context response information, issues after the new Mobility Management Entity, also comprises step: new Mobility Management Entity is initiated the authentication flow process to the user.
A kind of local IP access system comprises: terminal, base station, Mobility Management Entity, local home agent L-HA, wherein,
Described terminal is used for sending Attach Request message by the base station to Mobility Management Entity; After receiving the message that send the base station, obtain the IP address of L-HA, and the Security Association of initiation and foundation and L-HA; And notify L-HA to carry out Binding Update, after L-HA confirms to bind successfully, send and adhere to success message to Mobility Management Entity;
Described Mobility Management Entity is used for sending to adhere to accepting message to the base station, and indicates this base station to distribute Care-of Address for the user;
Described base station is used for distributing Care-of Address according to the user that is designated as of mobility management entity, and with the Care-of Address that distributes with adhere to and accept message and send to terminal together;
Described L-HA is used for initiating Security Association when setting up in terminal, set up with terminal Security Association; And after the Binding Update success, bind successfully to terminal check.
Described Mobility Management Entity also is used to initiate the authentication to the user, checking user legal identity.
This system also comprises home subscriber server HSS,
Described Mobility Management Entity, it is not out-of-date for this user registers at home subscriber server HSS also to be used at Mobility Management Entity, initiates the position to HSS and upgrades;
Described HSS is used to register that this Mobility Management Entity adheres to for this user is current, and sends the position and upgrade and confirm to Mobility Management Entity.
Local IP access method and system of the present invention, utilize mobile IP protocol to realize that local IP inserts, in L-HA, set up the Care-of Address of terminal and the binding relationship of home address, be that the user is by L-HA and PERCOM peripheral communication, so, the present invention can avoid the user to switch the service disconnection that causes under different base station, has improved user experience.
Description of drawings
Fig. 1 is a mobile communications network connection diagram in the prior art;
Fig. 2 is a local IP access method flow schematic diagram of the present invention;
Fig. 3 is a local IP access system configuration schematic diagram of the present invention;
Fig. 4 is user's attachment flow schematic diagram that the embodiment of the invention 1 local IP connects;
Fig. 5 is user's switching flow schematic diagram that the embodiment of the invention 2 local IP connect;
The user that Fig. 6 connects for the embodiment of the invention 3 local IP deactivates local IP and connects schematic flow sheet;
Fig. 7 is the schematic flow sheet that local IP connection activates in the service request process in the embodiment of the invention 4LTE system;
Fig. 8 is the schematic flow sheet that local IP connection activates in the tracing section updating process in the embodiment of the invention 5LTE system.
Embodiment
Basic thought of the present invention is: utilize mobile IP protocol to realize that local IP inserts, set up the Care-of Address of terminal and the binding relationship of home address in L-HA, promptly the user is by L-HA and PERCOM peripheral communication.
Mobile IP protocol is a kind of network layer scheme that locomotive function is provided on internet (Internet), makes node not interrupt ongoing communication when handoff links.Particularly mobile IP provides a kind of IP routing mechanism, and making still can be accessed by its home address when mobile node inserts foreign link.In the MIPv6 application scenarios, mainly by home agent (Home Agent, HA), (Mobile Node MN) forms for access network (Access network)/couple in router (Access Router) and mobile node.
Below will explain important proper noun about mobile IP:
Mobile node (Mobile Node): refer to move to another tie point from the tie point of a link among the mobile IP, simultaneously, still can pass through the accessed node of its home address.
Home agent (Home Agent, HA): refer to a router on the moving nodes local link.When mobile node left home link, the destination address that can intercept on its home link was the packet of moving nodes local address, was forwarded to the Care-of Address of mobile node registration by the tunnel.
Home address (Home Address, HoA): refer to distribute to the permanent IP address of mobile node, belong to the home link of mobile node.The IP routing mechanism of standard can send to its home link to the grouping of issuing the moving nodes local address.
Care-of Address (Care of Address, CoA): the IP address that obtains when referring to mobile node visit foreign link.The subnet prefix of this IP address is the foreign subnet prefix.
Binding (Binding): be the IPv6 home network prefix of MN and/or the incidence relation between IPv4 home address and the CoA.
Two stack mobile IP protocol sixth version (Dual Stack MIPv6, DS-MIPv6) can be used for keeping user terminal (User Equipment, UE) the IP address is constant, and to keep the customer service continuity, DSMIPv6 is a mobile IP protocol of supporting two stack IPv4 and IPv6.Access network or access route road are that UE distributes Care-of Address (CoA).When UE used mobility service, UE initiates the Internet Key Exchange the 2nd edition, and (Internet Key Exchange version 2 IKEv2) set up Security Association with HA, and HA can issue UE for UE distributing IP address (HoA) and this address.
HA is the home agent of MN, it is the topological anchor point of the home network prefix of MN, and the binding state of management MN, each binding state is corresponding to banding cache clauses and subclauses (the Binding Cache Entry of HA management, BCE), have in this BCE: mobile node sign (MN Identifier), the IPv6 home network prefix of the current use of MN and/or IPv4 home address also comprise the business information of current use among the BCE when MN inserts the EPS network.It is the IPv6 home network prefix of MN or the packet of IPv4 home address that HA can intercept destination address, is forwarded to the CoA of MN registration among the BCE.
Be described in further detail below in conjunction with the enforcement of accompanying drawing technical scheme.
Fig. 2 is a local IP access method flow schematic diagram of the present invention, and as shown in Figure 2, local IP access method of the present invention generally comprises following steps:
Step 201: terminal sends Attach Request message by the base station to Mobility Management Entity.
Generally carry user intention in the Attach Request message: local IP inserts and uses mobile IP.This base station can be a Home eNodeB, also can be macro base station.
Step 202: Mobility Management Entity sends to adhere to accepts message to the base station, and indicates this base station to distribute Care-of Address for the user.
Among the present invention, Mobility Management Entity can adopt local IP to insert to this user provides service according to the local policy decision of user intention, CAMEL-Subscription-Information and self configuration, and mobile IP is used in decision simultaneously.
This adheres to, and to accept message be Non-Access Stratum (NAS) message, wherein comprise response: use local IP to insert and use mobile IP to user intention, according to this locality configuration, can also comprise IP address or the global domain name (FQDN) of local home agent L-HA in this NAS message.
Need to prove that after Mobility Management Entity sent Attach Request message, Mobility Management Entity can be initiated the authentication to the user to terminal by the base station, checking user legal identity.
In addition, when described Mobility Management Entity not out-of-date for this user registers at HSS, described Mobility Management Entity need be initiated the position to HSS and be upgraded, HSS registers this Mobility Management Entity and adheres to for this user is current, and send position renewal affirmation to Mobility Management Entity, the position comprises user signing contract information in upgrading and confirming, generally comprises in this CAMEL-Subscription-Information to allow the subscriber's local access information.
Step 203: after the message that Mobility Management Entity sends is received in the base station, according to indication wherein, for this user distributes Care-of Address, and with the Care-of Address that distributes with adhere to and accept message and send to terminal together.
Step 204: after terminal is received the message of sending the base station, carry out the function that HA finds, the IP address that obtains L-HA.
Concrete, obtaining the method for the IP address of L-HA promptly finding has multiplely, for example, contains in the NAS message under the situation of IP address of L-HA, can directly obtain from NAS message; Perhaps, according to the FQDN of the L-HA in the NAS message, obtain the IP address of L-HA to domain name system server (DNS) inquiry; Perhaps,, or oneself construct the domain name of L-HA, obtain the IP address of L-HA to the DNS inquiry according to the IP address of own pre-configured L-HA.
Step 205: the Security Association of terminal initiation and foundation and L-HA.
Terminal is set up and the Security Association of L-HA is in order to guarantee the safety of the mutual signaling of both sides, and in this process, L-HA is this terminal distribution home address.
Step 206: terminal notice L-HA carries out Binding Update.
Concrete, terminal sends Binding Update to L-HA, generally comprises Care-of Address in the described Binding Update, makes to set up the Care-of Address of this terminal and the binding relationship of home address among the L-HA.After L-HA carries out Binding Update, send binding acknowledgement to terminal, after confirming to bind successfully, terminal just can send data by L-HA and PERCOM peripheral communication.
Need to prove being undertaken by the base station alternately between terminal and the L-HA.
Step 207: terminal sends adheres to success message to Mobility Management Entity.
Adhere to success message and send the IP address of wherein generally carrying the L-HA of the current connection of user by the base station.
Need to prove, local IP access described in the present invention refers to that not only the user adheres to, the user is switched, the user deactivates and connection activation etc. all belongs to the scope of local IP access, and the user adheres to, the user is switched, the user deactivates and connect activation process will be elaborated in following embodiment.
Fig. 3 is a local IP access system configuration schematic diagram of the present invention, and as shown in Figure 3, local IP access system configuration of the present invention comprises: terminal 31, base station 32, Mobility Management Entity 33, L-HA 34, wherein,
Base station 32 is used for distributing Care-of Address according to the user that is designated as of mobility management entity 33, and with the Care-of Address that distributes with adhere to and accept message and send to terminal 31 together;
L-HA 34, are used for initiating Security Associations when setting up in terminal 31, set up with terminal 31 Security Association; And after the Binding Update success, confirm to bind successfully to terminal 31.
This system also comprises HSS 35,
Embodiment 1
In the present embodiment, describe user's attachment flow, the base station is HeNB, and Mobility Management Entity is MME.
Fig. 4 is user's attachment flow schematic diagram that the embodiment of the invention 1 local IP connects, and as shown in Figure 4, embodiment 1 terminal is attached to network, sets up the LIPA connection and generally comprises following steps:
Step 401: terminal sends Attach Request message by HeNB to MME.
Generally carry user intention in the Attach Request message: local IP inserts and uses mobile IP.
Step 402:MME initiates the authentication to the user, checking user legal identity.
In this process, HSS need generate relevant Ciphering Key and send to MME, and the user need provide effective identity.This step is an optional step.
Step 403: when described MME not out-of-date for this user registers at HSS, described MME need initiate the position to HSS and upgrade, HSS registers this MME and adheres to for this user is current, and send position renewal affirmation to MME, the position comprises user signing contract information in upgrading and confirming, generally comprises in this CAMEL-Subscription-Information to allow the subscriber's local access information.
Step 404:MME adopts local IP to insert to this user provides service according to the local policy decision of user intention, CAMEL-Subscription-Information and self configuration, and mobile IP is used in decision simultaneously.
Step 405:MME sends to adhere to and accepts message to HeNB.
This adheres to, and to accept message be Non-Access Stratum (NAS) message, wherein comprise response: use local IP to insert and use mobile IP to user intention, according to this locality configuration, can also comprise IP address or the global domain name (FQDN) of local home agent L-HA in this NAS message.Need to prove, MME send to HeNB adhere to accept message in, also need to indicate this HeNB to distribute Care-of Address for the user.
In the present embodiment, Mobility Management Entity is MME, and the base station is HeNB, and then MME sends S1-AP message to HeNB, and S1-AP is the application protocol on the interface S1, and the S1 interface is the interface between HeNB and the MME here.
After step 406:HeNB receives the message that MME sends, according to indication wherein, for this user distributes Care-of Address, and with the Care-of Address that distributes with adhere to and accept message and send to terminal together.
Step 407: after terminal is received the message that HeNB sends, carry out the function that HA finds, the IP address that obtains L-HA.
Concrete, obtaining the method for the IP address of L-HA promptly finding has multiplely, for example, contains in the NAS message under the situation of IP address of L-HA, can directly obtain from NAS message; Perhaps, according to the FQDN of the L-HA in the NAS message, obtain the IP address of L-HA to domain name system server (DNS) inquiry; Perhaps,, or oneself construct the domain name of L-HA, obtain the IP address of L-HA to the DNS inquiry according to the IP address of own pre-configured L-HA.
Step 408: the Security Association of terminal initiation and foundation and L-HA.
Terminal is set up and the Security Association of L-HA is in order to guarantee the safety of the mutual signaling of both sides, and in this process, L-HA is this terminal distribution home address.
Step 409: terminal sends Binding Update to L-HA.
Generally comprise Care-of Address in the Binding Update, make and set up the Care-of Address of this terminal and the binding relationship of home address among the L-HA.
Step 410:L-HA sends binding acknowledgement to terminal, confirms to bind successfully.
After binding successfully, terminal just can send data by L-HA and PERCOM peripheral communication.
Step 411: terminal sends adheres to success message to MME.
Adhere to success message and send the IP address of wherein generally carrying the L-HA of the current connection of user by HeNB.
Embodiment 2
Fig. 5 is user's switching flow schematic diagram that the embodiment of the invention 2 local IP connect, and as shown in Figure 5, user's switching flow that embodiment 2 local IP connect generally comprises following steps:
Step 501: terminal is set up the LIPA connection that inserts external network by source base station.
Here, concrete access process is with described in the embodiment 1.
Step 502: source base station receives the wireless signal measurement report that terminal provides, and decision switches to target BS with this user, then sends a handover request to the source Mobility Management Entity.
Generally carry the target BS sign in the handoff request and distribute the Care-of Address indication.In the present embodiment, Mobility Management Entity is MME.
Step 503: the source Mobility Management Entity is transmitted to target BS with this handoff request by target mobility management entity.
When two base stations of this switching in same Mobility Management Entity following time, above-mentioned handoff request is issued target BS from source base station by described common Mobility Management Entity.
Step 504: target BS for this terminal distribution Care-of Address, is reserved Radio Resource according to distributing the Care-of Address indication simultaneously, waits for user's switching.
Step 505: target BS sends handoff response to source base station.
Generally speaking, target mobility management entity and source Mobility Management Entity are responsible for transmitting this message, when two base stations in same Mobility Management Entity following time, this message is transmitted by described common Mobility Management Entity.
Step 506: source base station sends switching command to terminal, requires terminal to switch to target BS.
This switching command generally carries Care-of Address and the target BS sign that target BS is a terminal distribution.
Step 507: the terminal wireless channel switches to target BS, sends agent binding update messages to L-HA.
Generally carry the Care-of Address that target BS is a terminal distribution in the agent binding update messages.
Step 508:L-HA upgrades the banding cache of this terminal of self preserving, and is the Care-of Address and the home address binding of terminal distribution with target BS, sends binding acknowledgement message afterwards to terminal.
Step 509: this terminal is finished and is switched to target BS.
Embodiment 3
The user that Fig. 6 connects for the embodiment of the invention 3 local IP deactivates local IP and connects schematic flow sheet, and as shown in Figure 6, the user that the embodiment of the invention 3 local IP connect deactivates local IP connection and generally comprises following steps:
Step 601: the local IP of terminal decision deactivation connects, and sends binding update messages to L-HA, and wherein carrying life cycle (lifetime) is zero.
Step 602:L-HA deletes the binding relationship of this user's Care-of Address and home address, sends binding acknowledgement message to terminal.
Step 603: terminal or L-HA initiate and the deletion Security Association.
This step is an optional step.If do not delete in this flow process, can wait for that Security Association expires life cycle after, the local separately deletion of terminal and L-HA.
Step 604: terminal sends PDN and connects interrupt request message to Mobility Management Entity, notifies local IP to connect deletion.
Step 605: this subscriber's local access information that the Mobility Management Entity deletion self is preserved can be the information of APN and HA.
In the present invention, PDN GW is the physical NE of 3GPP, and HA is one of logic function of PDN GW.
Step 606: Mobility Management Entity sends deactivation carrying request to the base station, and the deletion of request base station connects the radio bearer resources of setting up for local IP.
Step 607: base station deletion is connected radio bearer resources with local IP between the terminal.
Step 608: the base station sends the deactivation carrying to Mobility Management Entity and replys after finishing above-mentioned radio bearer resources deletion, replys Mobility Management Entity and finishes the Radio Resource deletion.
Embodiment 4
Fig. 7 is the schematic flow sheet that local IP connection activates in the service request process in the embodiment of the invention 4LTE system, as shown in Figure 7, when the embodiment of the invention 4 terminals transfer connected state to by Idle state, carries out service request in new base station and generally comprises following steps:
Step 701: have local IP access behind the terminal access to wireless communication system and connect, after this terminal enters Idle state.
Step 702: terminal sends service request information through new base station to new Mobility Management Entity.
Step 703: Mobility Management Entity carries out authentication to terminal.
Here, specifically by Mobility Management Entity, home subscriber server and terminal are carried out the NAS verification process jointly, and this step is optional.
Step 704: Mobility Management Entity sends initial context to new base station and sets up request message.
Initial context is set up to need in the request message to carry and is distributed the CoA indication, and the base station of looking for novelty is this terminal distribution CoA.
When the user carried out service request, the base station did not change, and promptly new base station is identical with former base station, and then Mobility Management Entity can not carry above-mentioned distribution CoA indication in the message that sends.
Step 705: new base station is carried out radio bearer and is set up process, according to above-mentioned distribution CoA indication, is described terminal distribution CoA, and sets up at radio bearer and to send to terminal in the process.
Step 706: new base station is replied the foundation of Mobility Management Entity initial context and is finished.
After terminal got access to new CoA, terminal sent Binding Update to local home agent, and with new CoA and home address binding, local home agent is replied binding acknowledgement in local home agent.The user will be by local home agent and new base station and PERCOM peripheral communication afterwards.
Embodiment 5
Fig. 8 be in the embodiment of the invention 5LTE system in the tracing section updating process local IP connect the schematic flow sheet that activates, as shown in Figure 8, in the embodiment of the invention 5LTE system in the tracing section updating process local IP connect to activate and generally comprise following steps:
Step 801: have local IP access behind the terminal access to wireless communication system and connect, after this terminal enters Idle state.
Step 802: the terminal of Idle state regularly or moving initiating updating of tracking area flow process when causing the tracking area tabulation to change.
Concrete, terminal sends the tracing section updating request and is the base station of Terminal Service (being referred to as new base station) to current.After terminal moved, this base station was different with the base station (being referred to as former base station) before terminal enters Idle state.Need to prove that the tracing section updating request is a NAS message.
The Mobility Management Entity (being referred to as new Mobility Management Entity) of current service is selected for the user in the base station, and the tracing section updating request package is contained in initial user message/upstream message message transfer issues new Mobility Management Entity.
Mobility Management Entity is MME, and new Mobility Management Entity enters Idle state Mobility Management Entity (being referred to as former Mobility Management Entity) before with terminal may be identical.This moment, step 803,804,805,806,807,808 was not carried out.
Step 803: when new Mobility Management Entity and former Mobility Management Entity were inequality, new Mobility Management Entity was initiated context to former Mobility Management Entity and is obtained flow process, promptly sends context request.
Step 804: former Mobility Management Entity is included in user's contextual information in the context response information, issues new Mobility Management Entity.
Because the user exists local IP access to connect, the LIPA that carries the local IP access connection in the message connects indication, uses IP address or the identity of mobile IP indication, HA.
Step 805: new Mobility Management Entity is initiated the authentication flow process to the user.
This step is an optional step.
Step 806: new Mobility Management Entity is preserved the information of carrying in the step 804, and responds context acknowledgement message to former Mobility Management Entity.
Step 807: new Mobility Management Entity is initiated more new technological process of position to home location server.
Step 808: home location server is initiated the canceling position flow process to former Mobility Management Entity.
Step 809: Mobility Management Entity sends initial context to new base station and sets up request message, sends tracing section updating simultaneously and accepts message, wherein carries the LIPA indication and the base station of will looking for novelty is indicated for this user distributes CoA.
When the user carried out tracing section updating, if the base station does not change, promptly new base station was identical with former base station, and Mobility Management Entity can not carry above-mentioned information in the message that sends.
Step 810: message is received in new base station, according to carrying the LIPA indication in the message and indicating for this user distributes CoA, for this user distributes CoA, sets up at radio bearer and to send to UE in the process.
Step 811: new base station is notified new Mobility Management Entity initial context to set up and is finished.
Step 812～step 813: new base station sends tracing section updating with new Mobility Management Entity and accepts forwards to terminal.Terminal is responded tracing section updating alternatively and is finished message.
After terminal got access to new CoA, terminal sent Binding Update to local home agent, and with new CoA and home address binding, local home agent is replied binding acknowledgement in local home agent.The user will be by local home agent and new base station and PERCOM peripheral communication afterwards.
In order to simplify description, above embodiment is applicable to that there is not the situation of femto gateway in the E-UTRAN system; Certainly, the present invention also is applicable under the situation that has femto gateway, and this moment can be Home eNodeB and femto gateway unification as base station or base station sub-system; The present invention is applicable to that also the Home eNodeB subsystem of UTRAN/GERAN and base station sub-system are the macro base station scene in addition, and this moment, Mobility Management Entity was SGSN, was not repeated at this.
Need to prove, among the above embodiment, the base station can be Home eNodeB, radio network controller (Radio Network Controller, RNC).Mobility Management Entity can be mobile management unit (Mobility Management Entity, MME), (the Mobile Switching Centre of mobile switching centre, MSC), Serving GPRS Support Node (Serving GPRS Support Node, SGSN).It can be L-PGW, L-GGSN that local access network closes, and the local service gateway can be L-SGW, L-SGSN.The core net IAD can be P-GW, GGSN, and the core net gateway can be S-GW, SGSN.In addition, the base station of local IP access can to close the address identical with local access network.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (14)
1. a local IP access method is characterized in that, this method comprises:
After Mobility Management Entity sent Attach Request message, Mobility Management Entity sends to adhere to accepted message to the base station to terminal, and indicates this base station to distribute Care-of Address for the user by the base station;
Care-of Address is distributed according to the user that is designated as of Mobility Management Entity in the base station, and with the Care-of Address that distributes with adhere to and accept message and send to terminal together;
After terminal is received the message of sending the base station, obtain the IP address of local home agent L-HA, and the Security Association of initiation and foundation and L-HA;
Terminal notice L-HA carries out Binding Update, and after L-HA confirms to bind successfully, sends and adhere to success message to Mobility Management Entity.
2. local IP access method according to claim 1 is characterized in that, described terminal after Mobility Management Entity sends Attach Request message, also comprises step by the base station: Mobility Management Entity is initiated the authentication to the user, checking user legal identity.
3. local IP access method according to claim 1, it is characterized in that, described terminal by the base station after Mobility Management Entity sends Attach Request message, also comprise step: described Mobility Management Entity was not registered for this user at home subscriber server HSS, described Mobility Management Entity is initiated the position to HSS and is upgraded, HSS registers this Mobility Management Entity and adheres to for this user is current, and sends the position and upgrade and confirm to Mobility Management Entity.
4. local IP access method according to claim 1 is characterized in that,
Describedly adhere to that to accept message be non access stratum NAS message, wherein comprise response user intention: use local IP to insert and use mobile IP, and the IP address of L-HA or global domain name FQDN;
The IP address that described terminal is obtained L-HA is: directly obtain from described NAS message; Perhaps, according to the FQDN of the L-HA in the NAS message, obtain the IP address of L-HA to domain name system server DNS inquiry; Perhaps,, or oneself construct the domain name of L-HA, obtain the IP address of L-HA to the DNS inquiry according to the IP address of own pre-configured L-HA.
5. local IP access method according to claim 1 is characterized in that, this method comprises that also carrying out the user switches, and is specially:
After terminal foundation inserts the LIPA connection of external network by source base station, source base station receives the wireless signal measurement report that terminal provides, decision switches to target BS with this user, then send a handover request to the source Mobility Management Entity, carry the target BS sign in the described handoff request and distribute the Care-of Address indication;
The source Mobility Management Entity is transmitted to target BS with this handoff request by target mobility management entity;
Target BS for this terminal distribution Care-of Address, is reserved Radio Resource according to distributing the Care-of Address indication simultaneously, waits for user's switching, sends handoff response afterwards to source base station;
Source base station sends switching command to terminal, requires terminal to switch to target BS, and described switching command carries Care-of Address and the target BS sign that target BS is a terminal distribution;
The terminal wireless channel switches to target BS, sends agent binding update messages to L-HA, carries the Care-of Address that target BS is a terminal distribution in the described agent binding update messages;
L-HA upgrades the banding cache of this terminal of self preserving, and is the Care-of Address and the home address binding of terminal distribution with target BS;
L-HA sends binding acknowledgement message to terminal, and described terminal is finished and switched to target BS.
6. local IP access method according to claim 1 is characterized in that, this method comprises that also the user deactivates local IP and connects, and is specially:
The local IP of terminal decision deactivation connects, and sends binding update messages to L-HA;
L-HA deletes the binding relationship of this user's Care-of Address and home address, sends binding acknowledgement message to terminal;
Terminal sends PDN and connects interrupt request message to Mobility Management Entity, notifies local IP to connect deletion;
The described subscriber's local access information that Mobility Management Entity deletion self is preserved is concurrently sent to the carrying request of living and is given the base station, and the deletion of request base station connects the radio bearer resources of setting up for local IP;
Base station deletion is connected radio bearer resources with local IP between the terminal, replys Mobility Management Entity afterwards and finishes Radio Resource and delete.
7. local IP access method according to claim 6 is characterized in that, described L-HA sends binding acknowledgement message to also comprising step after the terminal: terminal or L-HA initiate and the deletion Security Association.
8. local IP access method according to claim 1 is characterized in that, this method also is included in and activates local IP connection in the service request process, is specially:
Have local IP access behind the terminal access to wireless communication system and connect, after this terminal enters Idle state;
Terminal sends service request information through new base station to new Mobility Management Entity;
Mobility Management Entity sends initial context to new base station and sets up request message, and described initial context is set up to carry in the request message and distributed the CoA indication;
New base station is carried out radio bearer and is set up process, is described terminal distribution CoA, and sets up at radio bearer and to send to UE in the process;
New base station is replied the foundation of Mobility Management Entity initial context and is finished.
9. local IP access method according to claim 8 is characterized in that, described terminal after Mobility Management Entity sends service request information, also comprises step through new base station: new Mobility Management Entity carries out authentication to terminal.
10. local IP access method according to claim 1 is characterized in that, this method also is included in and activates local IP connection in the tracing section updating process, is specially:
Have local IP access behind the terminal access to wireless communication system and connect, after this terminal enters Idle state;
The terminal of Idle state regularly or moving initiating updating of tracking area flow process when causing the tracking area tabulation to change, promptly terminal sends the tracing section updating request to new base station, described tracing section updating request is a NAS message;
New Mobility Management Entity is issued for the tracing section updating request package is contained in the base station in initial user message/upstream message message transfer;
New Mobility Management Entity and former Mobility Management Entity are inequality, and new Mobility Management Entity is initiated context to former Mobility Management Entity and obtained flow process, promptly sends context request;
Former Mobility Management Entity is included in user's contextual information in the context response information, issue new Mobility Management Entity, the LIPA that carries the local IP access connection in the described context response information connects indication, uses IP address or the identity of mobile IP indication, HA;
New Mobility Management Entity is preserved the information of receiving, and responds context acknowledgement message to former Mobility Management Entity;
New Mobility Management Entity is initiated more new technological process of position to home location server;
Home location server is initiated the canceling position flow process to former Mobility Management Entity;
Mobility Management Entity sends initial context to new base station and sets up request message, sends tracing section updating simultaneously and accepts message, wherein carries the LIPA indication and the base station of will looking for novelty is indicated for this user distributes CoA;
CoA is distributed for this user in new base station, and sets up at radio bearer and to send to UE in the process;
New base station is notified new Mobility Management Entity initial context to set up and is finished, and new Mobility Management Entity transmission tracing section updating is accepted forwards to terminal.
11. local IP access method according to claim 10, it is characterized in that, former Mobility Management Entity is included in user's contextual information in the context response information, issue after the new Mobility Management Entity, also comprise step: new Mobility Management Entity is initiated the authentication flow process to the user.
12. a local IP access system is characterized in that, this system comprises: terminal, base station, Mobility Management Entity, local home agent L-HA, wherein,
Described terminal is used for sending Attach Request message by the base station to Mobility Management Entity; After receiving the message that send the base station, obtain the IP address of L-HA, and the Security Association of initiation and foundation and L-HA; And notify L-HA to carry out Binding Update, after L-HA confirms to bind successfully, send and adhere to success message to Mobility Management Entity;
Described Mobility Management Entity is used for sending to adhere to accepting message to the base station, and indicates this base station to distribute Care-of Address for the user;
Described base station is used for distributing Care-of Address according to the user that is designated as of mobility management entity, and with the Care-of Address that distributes with adhere to and accept message and send to terminal together;
Described L-HA is used for initiating Security Association when setting up in terminal, set up with terminal Security Association; And after the Binding Update success, bind successfully to terminal check.
13. local IP access according to claim 12 system is characterized in that, described Mobility Management Entity also is used to initiate the authentication to the user, checking user legal identity.
14. local IP access according to claim 12 system is characterized in that this system also comprises home subscriber server HSS,
Described Mobility Management Entity, it is not out-of-date for this user registers at home subscriber server HSS also to be used at Mobility Management Entity, initiates the position to HSS and upgrades;
Described HSS is used to register that this Mobility Management Entity adheres to for this user is current, and sends the position and upgrade and confirm to Mobility Management Entity.
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