CN101730151B - Method, system and access service network gateway for realizing DHCP mode negotiation - Google Patents
Method, system and access service network gateway for realizing DHCP mode negotiation Download PDFInfo
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Abstract
The invention discloses a method for realizing DHCP mode negotiation, comprising the following steps: after an IPv4 and IPv6 initial service flow between an ASN-GW and a UE of a WiMAX network is established, the ASN-GW transmits a PBU message to a PDN-GW; if applying a DHCP Relay mode, carries a delay IPv4 address application preference indication is carried; otherwise, the delay IPv4 address application preference indication is not carried; the PDN-GW receives the PBU message and transmits a PBA message to the ASN-GW; if the ASN-GW is allowed to utilize the DHCP Relay mode, the PBA message carries the delay IPv4 address application preference indication; otherwise, the PBA message does not carry the IPv4 address application preference indication; after the ASN-GW receives the PBA message, the DHCP mode is set; if the IPv4 address is carried therein to apply for a preference indication, the DHCP mode is configured to be a DHCP Relay mode; otherwise, a DHCP Proxy mode is configured, and the DHCP mode negotiation is finished. In the invention, the method, the system and the access service network gateway can realize the DHCP mode negotiation.
Description
Technical field
The present invention relates to the WiMAX technology, relate in particular to a kind of method, system and access service network gateway of the DHCP of realization mode negotiation.
Background technology
WiMAX (World Interoperability for Microwave Access, WiMax; World Interoperability for MicrowaveAccess) network is based on the wireless access wide band technology of IEEE 802.16 standards, can effectively utilize the limited wireless frequency spectrum resource and bigger bandwidth of air-interface (data transmission capabilities of the highest 70Mbps) is provided.But the WiMAX network only provides the connection of IP layer to the user, do not define service control function, and controlled telecommunication service can't be provided, and therefore needs with the other system intercommunication so that amalgamation and coexistence, for operator provides more effective operation.The 3GPP network is the business network of current comparative maturity, also is the architecture of future network development.In order to keep the strong competitiveness of 3-G (Generation Three mobile communication system), must improve its network performance and reduce networking and operation cost at moving communicating field.Therefore; 3GPP (3rd Generation Partnership Project; Third generation partner program) standardization effort group is just endeavouring to study core network system evolution---EPC (Evolved PacketCore of future generation at present; The packet-based core networks of evolution), purpose is can be for the user provides higher transmission rate, shorter transmission delay.The intercommunication of WiMAX and two kinds of networks of 3GPP will help two network advantages complementations; And expand the coverage area; Let the mobile subscriber in different Radio Access Network environment, can utilize two networks different characteristic separately widely in the geographic range, can obtain consistent Operational Visit again.
Fig. 1 is subscriber equipment (User Equipment; Be called for short UE) be under the non-roaming situation through WiMAX wireless access network and universal land radio access web (the Evolved UniversalTerrestrial Radio Access Network through evolution; E-UTRAN) access belonging public land mobile network (Home PLMN; Abbreviate HPLMN as) structured flowchart, comprise following network element:
Packet data network gateway (Packet Data Network Gateway; Abbreviate PDN-GW as): be positioned at the 3GPP network; Be used for being responsible for terminal/user equipment (Terminal/User Equipment; Being called for short UE, all is same notion in the literary composition) accessing group data net (Packet DataNetwork abbreviates PDN as);
Home subscriber device server (Home Subscriber Server abbreviates HSS as): be positioned at the 3GPP network, be used for forever preserving the subscription data and the secure data of subscriber equipment.
Also comprise among the figure mobile management unit (Mobility Management Entity, MME), gateway (Serving Gateway, S-GW).In order to support the access of non-3GPP connecting system; The EPC system also comprises authentication and authorization charging server (3GPP Authentication, Authorisation andAccounting abbreviate 3GPP AAA Server as) and authentication and authorization charging agency (AAA Proxy).
There is trusting relationship in WiMAX Access Network for trusting between 3GPP network and this WiMAX connecting system, and the WiMAX connecting system can directly insert PDN-GW through the S2a interface.
When 3GPP inserted, UE sent Attach Request message and gives MME to initiate the initial network access attempts and to carry out default PDN establishment of connection.Because the IPv4 address is more rare, exist UE after PDN connects the foundation completion, to pass through the situation of its protocol stack of DHCP (DHCP, Dynamic HostConfiguration Protocol) process application IPv4 address configuration again.Protocol configuration option in the Attach Request message (Protocol Configuration Option; Be called for short PCO) be used between UE and PDN-GW, transmitting and the exchange agreement configuration data, " DHCPv4 carries out IPv4 application IP addresses (000BH) " sign wherein is to PDN-GW indication lag IPv4 application IP addresses preference.
The 3GPP network is to postponing specifically being treated to of IPv4 application IP addresses: if when the PDN type that PDN connects is IPv4, it is the IPv4 address distributed of UE and postpone the indication of IPv4 application IP addresses preference that PDN-GW carries in returning to the PBA message of S-GW.In this case, in returning to the response message of UE, will not offer UE, but after default bearer was set up completion, the follow-up initiation of UE DHCPv4 returned to UE with the address during process again for the IPv4 address that UE distributes.When if the PDN type that PDN connects is IPv4v6, PDN-GW only carries the IPv6 network prefix and the indication of delay IPv4 application IP addresses preference of distributing into UE in returning to the PBA message of S-GW.In this case, only will offer UE through advertising of route (Router Advertisement is called for short RA) message for the IPv6 network prefix that UE distributes.After default bearer was set up completion, the follow-up initiation of UE DHCPv4 process was obtained the IPv4 address of distribution again from PDN-GW.
Fig. 2 is default bearer in the 3GPP technology and sets up and accomplish the flow chart that back UE passes through DHCPv4 process request IPv4 address, may further comprise the steps:
Step 201, UE initiates initial attach request procedure and sets up default PDN to connect;
If the PDN type that PDN connects in initial attaching process is IPv4 or IPv4v6; Then UE may will postpone IPv4 application IP addresses indications through the PCO of initial Attach Request message and carry to PDN-GW, in PBA message, will postpone IPv4 application IP addresses preference by PDN-GW again and indicate and return to S-GW.
After step 202, default bearer were set up and accomplished, UE sent DHCPv4 and finds that message application IPv4 address is to carry out protocol configuration;
Step 203～204, if in initial attaching process, the PDN type is under the situation that not have to apply for of IPv4v6 and IPv4 address, then execution in step 203-204 is with the IPv4 address that please look for novelty and upgrade current register.The IPv4 address parameter of the UE address information field in the PBU message is set to 0.0.0.0, and HNP (Home Network Prefix is called for short home network prefix) is set to the HNP of IP CAN session in the attaching process;
Step 205, S-GW is as DHCP Relay, then will find that through DHCPv4 forwards is to the PDN-GW that takes on the DHCPv4 server for the IPv4 address of UE application;
Step 206, PDN-GW carries out address validation and carries out the Binding Update of UE, and the DHCPv4 that after prolongation IP address lease provides, will contain UE IPv4 address gives information and sends to S-GW;
Step 208, UE sends the DHCPv4 request message and gives S-GW, wherein carries the IPv4 address of having applied for;
Step 209, S-GW transmits the DHCPv4 request message to PDN-GW, wherein comprises the IPv4 address of asking;
Step 210, PDN-GW returns the DHCPv4 acknowledge message to S-GW, wherein comprises IP address lease time and other configuration informations;
Step 212, under the situation of having distributed new IPv4 address, PCEF initiates IP-CAN session modification process to the PCRF of home network, if change has taken place the PCC rule, then PCRF will provide the PCC of renewal regular to PDN-GW in this process;
Step 213, if change has taken place the PCC rule, PCRF will initiate the process that provides of gateway control and QoS rule;
Step 214, S-GW initiates the bearing modification process.
In the WiMAX network design; Access service network gateway (Access Service NetworkGateway; Be called for short ASN-GW) possibly be DHCP Relay or DHCP Proxy pattern; And in the WiMAX network, there is not this type of attach request Non-Access Stratum (Non AccessStratum like the 3GPP network; Being called for short NAS) signaling is to transmit PCO information to network, and prior art also reaches how to realize that the IPv4 address delayed filing of UE proposes solution effectively to the DHCP mode negotiation problem of ASN-GW.
Summary of the invention
The technical problem that the present invention will solve provides a kind of method, system and access service network gateway of realizing consulting the DHCP pattern, to realize the DHCP mode negotiation.
In order to solve the problems of the technologies described above, the present invention provides a kind of method that realizes consulting the DHCP pattern, and this method comprises:
After accomplishing IPv4 and the foundation of IPv6 initial service flow between the access service network gateway ASN-GW of World Interoperability for Microwave Access, WiMax WiMAX network and the user equipment (UE); Said ASN-GW sends agent binding update PBU message to core network packet data network gateway PDN-GW; If then carrying, application dynamic host configuration protocol relay DHCP Relay pattern postpones the indication of IPv4 application IP addresses preference; Otherwise, do not carry the indication of delay IPv4 application IP addresses preference;
Said PDN-GW receives said PBU message and sends agent binding to said ASN-GW and confirm PBA message; If allow said ASN-GW to adopt DHCP Relay pattern; Then said PBA message is carried and is postponed the indication of IPv4 application IP addresses preference, otherwise, do not carry the indication of delay IPv4 application IP addresses preference;
Said ASN-GW is provided with the DHCP pattern after receiving said PBA message, if wherein carry said delay IPv4 application IP addresses preference indication, it is DHCP Relay pattern that the DHCP pattern then is set, otherwise is set to DHCP Proxy pattern, accomplishes the DHCP mode negotiation.
Further, carry grouped data network PDN type in the said PBU message, to be said ASN-GW according to user's initial service flow set up said PDN type that situation confirms, is IPv4v6.
Further; After accomplishing IPv4 and the foundation of IPv6 initial service flow between ASN-GW and the said UE; Said ASN-GW triggers timer, and dhcp discover message and route RS message have received all or timer expiry that said ASN-GW sends said PBU message to said PDN-GW.
Further, during said timer expiry, said ASN-GW only receives route requests RS message, also carries IPv6 network prefix solicited message in the PBU message that said ASN-GW sends, and also carrying PDN-GW in the said PBA message is the IPv6 network prefix of UE application.
For solving the problems of the technologies described above; The present invention also provides a kind of system that realizes the DHCP mode negotiation; Said system comprises the access service network gateway ASN-GW of the World Interoperability for Microwave Access, WiMax WiMAX Access Network that connects through network and the packet data network gateway PDN-GW of 3GPP core net; Wherein
Said ASN-GW is used for after IPv4 and the foundation of IPv6 initial service flow; Send agent binding update PBU message to said PDN-GW; If then carrying, application DHCP Relay pattern postpones the indication of IPv4 application IP addresses preference, otherwise, do not carry the indication of delay IPv4 application IP addresses preference; Also be used to receive the agent binding affirmation PBA message that said PDN-GW sends, and the DHCP pattern is set, if wherein carry said delay IPv4 application IP addresses preference indication, it is DHCP Relay pattern that the DHCP pattern then is set, otherwise is set to DHCP Proxy pattern;
Said PDN-GW; Be used to receive said PBU message and send PBA message to said ASN-GW, if allow ASN-GW to adopt DHCP Relay pattern, then said PBA message is carried and is postponed the indication of IPv4 application IP addresses preference; Otherwise, do not carry the indication of delay IPv4 application IP addresses preference.
Further; PDN-GW is a particular content of confirming so said PBA message: postpone the indication of IPv4 application IP addresses preference if carry in the PBU message; Then in the PBA message of returning, carry IPv4 address and/or IPv6 network prefix, do not return the indication of delay IPv4 application IP addresses preference into the UE application; Postpone the indication of IPv4 application IP addresses preference if carry in the PBU message; Then whether decision allows ASN-GW to take DHCP Relay pattern according to collocation strategy; If allow; Then in the PBA message of returning, only apply for the IPv6 network prefix for UE and return postponing the indication of IPv4 application IP addresses preference, follow-up ASN-GW will be as DHCP relay; If do not allow, then carry IPv4 address and/or IPv6 network prefix into the UE application in the PBA message of returning, do not return the indication of delay IPv4 application IP addresses preference, follow-up ASN-GW will be as Dynamic Host Configuration Protocol server.
For solving the problems of the technologies described above; The present invention also provides a kind of access service network gateway of WiMAX Access Network; Said access service network gateway consults to confirm the DHCP pattern through the packet data network gateway PDN-GW with the 3GPP core net; Said access service network gateway comprises that DHCP pattern determination module, the message processing module, the DHCP pattern that are connected with said DHCP pattern determination module are provided with module and with said message processing module and DHCP pattern the transceiver module that module links to each other are set, wherein
Said DHCP pattern determination module is used for confirming the DHCP pattern of application and notifying said message processing module;
Said message processing module; Be used to generate the agent binding update PBU message of sending to said PDN-GW; In the PDN type is under the situation of IPv4v6; Carry the indication of delay IPv4 application IP addresses preference if confirm the then said PBU message of application DHCP Relay pattern, otherwise said PBU message is not carried and is postponed the indication of IPv4 application IP addresses preference;
Said DHCP pattern is provided with module; Be used for confirming the DHCP pattern and being provided with according to the PBA message that PDN-GW sends; Postpone the indication of IPv4 application IP addresses preference if carry in the said PBA message, then be set to DHCP Relay pattern, otherwise be set to DHCP Proxy pattern;
Said transceiver module is used for the PBU message that said message processing module generates is sent to said PDN-GW, also is used to receive the PBA message of said PDN-GW transmission and notify said DHCP pattern that module is set.
Further; Said access service network gateway also comprises the PDN type determination module that is connected with said message processing module; Be used to detect the situation of setting up of initial service flow, and confirm the PDN type and notify said message processing module, set up if judge IPv4 and IPv6 initial service flow according to the initial service flow of setting up; Confirm that then the PDN type is IPv4v6, carries said PDN type in the said PBU message.
Further; Said PDN type determination module detects notifies said transceiver module after initial service flow is set up; Timer is set and triggered to said transceiver module; When timer expiry or dhcp discover message and RS message had all been received, said transceiver module was notified said message processing module and is sent said PBU message to said PDN-GW.
Further; During said timer expiry; Said transceiver module is only received RS message, also carries IPv6 network prefix solicited message in the PBU message that said transceiver module sends, and also carrying PDN-GW in the PBA message that said transceiver module receives is the IPv6 network prefix of UE application.
When the user inserts the 3GPP core net through the WiMAX Access Network; The inventive method, system and access service network gateway postpone the indication of IPv4 application IP addresses preference is provided with judgement as the DHCP pattern foundation through carrying; Satisfying under the condition that postpones the IPv4 application IP addresses; ASN-GW acts on behalf of between UE and the PDN-GW and to consult the DHCP pattern, has solved the problem of IPv4 address delayed filing of mode negotiation and the UE of DHCP well.
Description of drawings
Fig. 1 is the intercommunication Organization Chart that WiMAX inserts the 3GPP network.
Fig. 2 is the flow chart that UE passed through DHCPv4 process request IPv4 address after default bearer foundation was accomplished in the existing 3GPP technology.
Fig. 3 is a flow chart of realizing the method for DHCP mode negotiation according to the present invention.
Fig. 4 is the flow chart of application example one of the present invention, and wherein ASN-GW and PDN-GW consult to confirm that the DHCP pattern is DHCP Relay in initial attaching process.
Fig. 5 is the flow chart of application example two of the present invention, and wherein ASN-GW and PDN-GW consult to confirm that the DHCP pattern is DHCP Proxy and accomplishes IPv4 and/or the application of IPv6 network prefix in initial attaching process.
Fig. 6 is the flow chart of application example three of the present invention, and wherein ASN-GW and PDN-GW consult to confirm that the DHCP pattern is DHCP Proxy and accomplishes the application of IPv6 network prefix in initial attaching process.
Fig. 7 is the sketch map that the present invention realizes the system of DHCP mode negotiation.
The practical implementation pattern
When the user inserted the 3GPP core net through the WiMAX Access Network, ASN-GW can set up situation according to user's initial service flow and confirm the PDN type in the PBU message.When UE supports the PDN type is IPv4v6 and when initiating dhcp process and coming the configuration protocol stack, ASN-GW in this process with PDN-GW through the PBU/PBA interacting message to consult to confirm the DHCP pattern of ASN-GW.
Satisfying under the condition that postpones the IPv4 application IP addresses, as shown in Figure 3, ASN-GW acts on behalf of the method that realizes the DHCP mode negotiation between UE and the PDN-GW, may further comprise the steps:
S301; After accomplishing IPv4 and the foundation of IPv6 initial service flow between ASN-GW and the UE; ASN-GW sends agent binding update PBU message to said PDN-GW; If then carrying, application DHCP Relay pattern postpones the indication of IPv4 application IP addresses preference, otherwise, do not carry the indication of delay IPv4 application IP addresses preference;
After having set up IPv4 and IPv6 initial service flow between ASN-GW and the UE; A short timer is set; Short timer expiry or dhcp discover message and RS message are all received; Then sending agent binding update (Proxy Binding Update is called for short PBU) message to PDN-GW immediately is UE request IP address.
Short timer expiry comprises three kinds of situation, and ASN-GW only receives route requests (Router Solicitation the abbreviates RS as) message (idiographic flow is seen Fig. 4 and Fig. 6) that UE sends; ASN only receives that dhcp discover message (idiographic flow is seen Fig. 5), ASN-GW that UE sends receive dhcp discover message and the RS message (idiographic flow is seen Fig. 5) that UE sends.
The DHCP pattern that ASN-GW confirms to hope employing according to system configuration, if the ASN-GW application adopts DHCP Relay pattern to postpone the IPv4 application IP addresses, then insertion postpones the indication of IPv4 application IP addresses preference in the PCO field of the PBU message that sends to PDN-GW; If DHCP Proxy pattern or other situation are adopted in the ASN-GW application, then do not insert this preference indication.
PDN type in the PBU message is that ASN-GW is provided with according to the initial service flow situation that UE sets up, and under the situation of IPv4 and the foundation of IPv6 initial service flow, confirms that the PDN type is IPv4v6.
If the PDN type that UE supports is IPv4, then set up the IPv4 initial service flow, if the PDN type that UE supports is IPv6, then set up the IPv6 initial service flow, if the PDN type that UE supports is IPv4v6, then set up two initial service flow of IPv4 and IPv6.The initial service flow situation that the ASN-GW basis is set up for UE is provided with the PDN type field of PBU message, like IPv4, and IPv6 or IPv4v6.
S302; After PDN-GW receives PBU message, send agent binding to said ASN-GW and confirm (Proxy Binding Acknowledge is called for short PBA) message; If allow ASN-GW to adopt the DHCPRelay pattern; Then said PBA message is carried and is postponed the indication of IPv4 application IP addresses preference, otherwise, do not carry the indication of delay IPv4 application IP addresses preference;
Whether carried the indication of delay IPv4 application IP addresses preference in the PDN-GW inspection PCO field.If do not carry, then in the PBA message of returning, carry IPv4 address and/or IPv6 network prefix into the UE application, do not return the indication of delay IPv4 application IP addresses preference.If carried the preference indication; Then whether decision allows ASN-GW to take DHCP Relay pattern according to information such as collocation strategies; If allow; Then in the PBA message of returning, only carry to UE applies for the IPv6 network prefix and return postponing the indication of IPv4 application IP addresses preference, follow-up ASN-GW will be as DHCP relay.If do not allow, then carry IPv4 address and/or IPv6 network prefix into the UE application in the PBA message of returning, do not return the indication of delay IPv4 application IP addresses preference, follow-up ASN-GW will be as Dynamic Host Configuration Protocol server.
S303, ASN-GW are provided with the DHCP pattern after receiving said PBA message, if wherein carry said delay IPv4 application IP addresses preference indication, it is the Relay pattern that the DHCP pattern then is set, otherwise is set to the Proxy pattern, accomplishes the DHCP mode negotiation.
ASN-GW is after receiving the PBA message of PDN-GW; Postpone the indication of IPv4 application IP addresses preference and in PBU message before this, indicated the indication of delay IPv4 application IP addresses preference to PDN-GW if find in PBA message, not to be provided with, this moment, ASN-GW need its current DHCP pattern be set to DHCP Proxy pattern.
S304, if the ASN-GW after consulting is a DHCP Relay pattern, then follow-up receive the dhcp message of UE after, directly be transmitted to PDN-GW; If the ASN-GW after consulting is a DHCP Proxy pattern, then ASN-GW can not transmit dhcp message and give PDN-GW, the dhcp process that the UE that promptly terminates initiates as Dynamic Host Configuration Protocol server.
Application example below in conjunction with Fig. 4, Fig. 5 and Fig. 6 describe is elaborated to the inventive method:
Application example one
Fig. 4 is that the PDN type that UE supports is under the situation of IPv4v6, and ASN-GW only receives the RS message that UE sends during timer expiry, and the flow chart of ASN-GW and the definite DHCP pattern DHCP Relay of PDN-GW negotiation, may further comprise the steps:
Step 401, terminal are carried out initial WiMAX network insertion process;
EAP access authentication, mandate and key delivery flow process are initiated and carried out to step 402;
Step 403, after successful authentication and the mandate, the PDN type that UE supports is IPv4v6, then sets up two initial service flow of IPv4 and IPv6;
ASN-GW is IPv4v6 according to the PDN type field that the initial service flow situation of setting up for UE is provided with PBU message, agent binding update messages is set simultaneously triggers timer wait UE transmission dhcp discover message request IPv4 address and/or RS message request IPv6 network prefix.
Step 404 when ASN-GW triggers timer expiry at agent binding update messages, only receives that the RS message of UE transmission is carried out address configuration with request IPv6 network prefix;
Step 405, it is that the terminal obtains the PDN address that DHCP Relay pattern is adopted in the ASN-GW application, then in the PCO of PBU message field, inserts to postpone the indication of IPv4 application IP addresses preference;
Step 406 is sent PBU message to PDN-GW among the ASN GW, wherein carries IPv6 network prefix solicited message, and postpones the indication of IPv4 application IP addresses preference;
Step 407; PDN-GW is checked through in the PCO of PBU message field and postpones the indication of IPv4 application IP addresses preference; And, then in PBA message, only carry to UE application IPv6 network prefix and delay IPv4 application IP addresses preference is set and indicate according to the definite DHCP Relay pattern that allows the ASN-GW indication of system configuration;
Step 408, PDN-GW sends to 3GPP AAA and upgrades the PDN-GW address message;
Step 409, PDN-GW returns PBA message to ASN-GW, wherein carries IPv6 network prefix and the indication of delay IPv4 application IP addresses preference into the UE application;
Step 410 is set up the PMIPv6 passage between ASN-GW and the PDN-GW;
Step 411; ASN-GW has indicated the indication of delay IPv4 application IP addresses preference to PDN-GW in PBU; And when PBA message, be checked through and postpone the indication of IPv4 application IP addresses preference; Expression is DHCP Relay with the DHCP pattern that PDN-GW consults, and it is DHCP Relay pattern that ASN-GW is provided with current pattern;
Step 412, ASN-GW sends advertising of route message to UE, carries the IPv6 network prefix into the UE application;
Step 413, UE sends DHCPv4 to ASN-GW and finds message, request IPv4 address;
Step 414～415, ASN-GW and PDN-GW are UE application IPv4 address alternately;
Step 416, the DHCP role that ASN-GW confirms in step 411 be Relay, then ASN-GW transmits DHCPv4 to PDN-GW and finds message, and setting through step 414～415 from IPv4 address that PDN-GW obtains;
Step 417, PDN-GW sends DHCPv4 to ASN-GW and gives information, and carries the IPv4 address of distributing into UE;
Step 418, ASN-GW transmits DHCPv4 to UE and gives information;
Step 419, UE sends the DHCPv4 request message and gives ASN-GW, wherein carries the IPv4 address of having applied for;
Step 420, ASN-GW transmits the DHCPv4 request message and gives PDN-GW;
Step 421, PDN-GW returns the DHCPv4 acknowledge message to ASN-GW;
Step 422, ASN-GW transmits the DHCPv4 acknowledge message to UE;
Step 423 is at the attaching process of WiMAX ASN completion L3.
IP connects the foundation completion between UE and the PDN GW at this moment, and IP operation can be carried out in the terminal.
Application example two
Fig. 5 is that the PDN type that UE supports is under the situation of IPv4v6; ASN-GW receives that the DHCPv4 that UE sends finds message or receives that DHCPv4 finds message and RS message during timer expiry; And ASN-GW and PDN-GW consult to confirm that the DHCP pattern is the flow chart of DHCP Proxy, and this flow process comprises:
Step 501～503 are with step 401～403;
Step 504 when ASN-GW triggers timer expiry at agent binding update messages, receives that the DHCPv4 that UE sends finds message request IPv4 address or receives that DHCPv4 finds that message request and RS message request IPv6 network prefix are to carry out address configuration;
Step 505 if DHCP Relay pattern is adopted in the ASN-GW application, then is provided with the indication of delay IPv4 application IP addresses preference in the PCO of PBU message field; If DHCP Proxy pattern is adopted in the ASN-GW application, the indication of delay IPv4 application IP addresses preference is not set in the PCO of PBU message field then;
Step 506, ASN GW sends PBU message to PDN-GW;
Step 507; If being checked through, PDN-GW do not postpone the indication of IPv4 application IP addresses preference in the PCO of PBU message field; Perhaps detect and postpone the indication of IPv4 application IP addresses preference but the definite DHCP Relay pattern that does not allow the ASN-GW indication of system configuration; Then in PBA message, be returned as IPv4 address or the IPv4 address and the IPv6 network prefix of UE application, the indication of delay IPv4 application IP addresses preference is not set;
Step 508, PDN-GW sends to 3GPP AAA and upgrades the PDN-GW address message;
Step 509, PDN-GW returns PBA message to ASN-GW, wherein carries IPv4 address or IPv4 address and IPv6 network prefix;
Step 510 is set up the PMIPv6 passage between ASN-GW and the PDN-GW;
Step 511, ASN-GW is not checked through when PBA message and postpones the indication of IPv4 application IP addresses preference, and expression is DHCP Proxy with the DHCP pattern that PDN-GW consults, and then current pattern is set is DHCP Proxy pattern to ASN-GW;
Step 512, if UE has sent route request information in step 504, and ASN-GW gets access to the IPv6 network prefix of distributing into UE from PDN-GW, then sends advertising of route message to UE, wherein carries the IPv6 network prefix into the UE application; If UE has sent DHCPv4 in step 504 and given information, and ASN-GW gets access to the IPv4 address of distributing into UE from PDN-GW, and then execution in step 513～515;
Step 513, ASN-GW sends DHCPv4 to UE and gives information, and wherein carries the IPv4 address into the UE application;
Step 514, UE sends the DHCPv4 request message and gives ASN-GW, wherein carries the IPv4 address of having applied for;
Step 515, ASN-GW sends the DHCPv4 acknowledge message to UE;
Step 516 is at the attaching process of WiMAX ASN completion L3.
IP connects the foundation completion between UE and the PDN GW at this moment, and IP operation can be carried out in the terminal.
Application example three
Fig. 6 is that the PDN type that UE supports is under the situation of IPv4v6, and ASN-GW only receives the RS message that UE sends during timer expiry, and ASN-GW to consult definite DHCP pattern with PDN-GW be the flow chart of DHCP Proxy, this flow process comprises:
Step 601～603 are with step 501～503;
Step 604, when ASN-GW triggered timer expiry at agent binding update messages, the RS message request IPv6 network prefix of receiving the UE transmission was to carry out address configuration;
Step 605～611 are with step 505～511;
Different with Fig. 5 is, among Fig. 6 among PBU and the PBA application and return have only the IPv6 network prefix.
Step 612, the IPv6 network prefix of distributing for UE that ASN-GW will get access to from PDN-GW sends to UE through advertising of route message;
Step 613, after ASN-GW and PDN-GW had consulted DHCP role, UE sent DHCPv4 discovery broadcast and gives network with request IPv4 address;
Step 614～615, ASN-GW and PDN-GW are UE application IPv4 address alternately;
Step 616, ASN-GW sends DHCPv4 to UE and gives information, and wherein carries the IPv4 address into the UE application;
Step 617, UE sends the DHCPv4 request message and gives ASN-GW, wherein carries the IPv4 address of having applied for;
Step 618, ASN-GW sends the DHCPv4 acknowledge message to UE;
Step 619 is at the attaching process of WiMAX ASN completion L3.
IP connects the foundation completion between UE and the PDN GW at this moment, and IP operation can be carried out in the terminal.
In order to realize above method, the present invention also provides a kind of system of the DHCP of realization mode negotiation, and is as shown in Figure 7, and said system comprises the access service network gateway ASN-GW of the WiMAX Access Network that connects through network and the PDN-GW of 3GPP core net, wherein,
Said ASN-GW is used for after IPv4 and the foundation of IPv6 initial service flow; Send agent binding update PBU message to said PDN-GW; If then carrying, application DHCP Relay pattern postpones the indication of IPv4 application IP addresses preference, otherwise, do not carry the indication of delay IPv4 application IP addresses preference; Also be used to receive the PBA message that said PDN-GW sends, and the DHCP pattern is set, if wherein carry said delay IPv4 application IP addresses preference indication, it is DHCP Relay pattern that the DHCP pattern then is set, otherwise is set to DHCP Proxy pattern;
Said PDN-GW; Be used to receive said PBU message and send PBA message to said ASN-GW, if allow ASN-GW to adopt DHCP Relay pattern, then said PBA message is carried and is postponed the indication of IPv4 application IP addresses preference; Otherwise, do not carry the indication of delay IPv4 application IP addresses preference.
After said PDN-GW receives said PBU message, determine whether to allow the DHCP pattern of said ASN-GW application according to system configuration.
PDN-GW is a particular content of confirming so said PBA message: postpone the indication of IPv4 application IP addresses preference if carry in the PBU message; Then in the PBA message of returning, carry IPv4 address and/or IPv6 network prefix, do not return the indication of delay IPv4 application IP addresses preference into the UE application; Postpone the indication of IPv4 application IP addresses preference if carry in the PBU message; Then whether decision allows ASN-GW to take DHCP Relay pattern according to collocation strategy; If allow; Then in the PBA message of returning, only apply for the IPv6 network prefix for UE and return postponing the indication of IPv4 application IP addresses preference, follow-up ASN-GW will be as DHCP relay; If do not allow, then carry IPv4 address and/or IPv6 network prefix into the UE application in the PBA message of returning, do not return the indication of delay IPv4 application IP addresses preference, follow-up ASN-GW will be as Dynamic Host Configuration Protocol server.
Particularly; Access service network gateway ASN-GW according to the invention consults to confirm the DHCP pattern through the packet data network gateway PDN-GW with the 3GPP core net; Comprise that DHCP pattern determination module, the message processing module, the DHCP pattern that are connected with said DHCP pattern determination module are provided with module and with said message processing module and DHCP pattern the transceiver module that module links to each other are set; Wherein
Said DHCP pattern determination module is used for confirming the DHCP pattern of application and notifying said message processing module;
Said message processing module; Be used to generate the agent binding update PBU message of sending to said PDN-GW; In the PDN type is under the situation of IPv4v6; Carry the indication of delay IPv4 application IP addresses preference if confirm the then said PBU message of application DHCP Relay pattern, otherwise said PBU message is not carried and is postponed the indication of IPv4 application IP addresses preference;
Said DHCP pattern is provided with module; Be used for confirming the DHCP pattern and being provided with according to the PBA message that PDN-GW sends; Postpone the indication of IPv4 application IP addresses preference if carry in the said PBA message, then be set to DHCP Relay pattern, otherwise be set to DHCP Proxy pattern.
Said transceiver module is used for the PBU message that message processing module generates is sent to said PDN-GW, also is used to receive the PBA message of said PDN-GW transmission and notify the DHCP pattern that module is set.
Said access service network gateway also comprises the PDN type determination module that is connected with said message processing module; Be used to detect the situation of setting up of initial service flow; And confirm the PDN type and notify said message processing module according to the initial service flow of setting up; Set up if judge IPv4 and IPv6 initial service flow, confirm that then the PDN type is IPv4v6.
Said PDN type determination module detects notifies said transceiver module after initial service flow is set up; Timer is set and triggered to said transceiver module; When timer expiry or dhcp discover message and RS message had all been received, said transceiver module was notified said message processing module and is sent said PBU message to said PDN-GW.
If during said timer expiry; Said transceiver module is only received RS message; Also carry IPv6 network prefix solicited message in the PBU message that said transceiver module sends, also carrying PDN-GW in the PBA message that said transceiver module receives is the IPv6 network prefix of UE application.
The above-mentioned just embodiment of the invention.The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art are when making various corresponding changes and distortion according to the present invention, and these change and be out of shape the protection range that all should belong to the appended claim of the present invention accordingly.
When the user inserts the 3GPP core net through the WiMAX Access Network; The inventive method, system and access service network gateway postpone the indication of IPv4 application IP addresses preference is provided with judgement as the DHCP pattern foundation through carrying; Satisfying under the condition that postpones the IPv4 application IP addresses; ASN-GW acts on behalf of between UE and the PDN-GW and to consult the DHCP pattern, has solved the problem of IPv4 address delayed filing of mode negotiation and the UE of DHCP well.
Claims (10)
1. a method that realizes consulting the DHCP pattern is characterized in that, this method comprises:
After accomplishing IPv4 and the foundation of IPv6 initial service flow between the access service network gateway ASN-GW of World Interoperability for Microwave Access, WiMax WiMAX network and the user equipment (UE); Said ASN-GW sends agent binding update PBU message to core network packet data network gateway PDN-GW; If then carrying, application dynamic host configuration protocol relay DHCP Relay pattern postpones the indication of IPv4 application IP addresses preference; Otherwise, do not carry the indication of delay IPv4 application IP addresses preference;
Said PDN-GW receives said PBU message and sends agent binding to said ASN-GW and confirm PBA message; If allow said ASN-GW to adopt DHCP Relay pattern; Then said PBA message is carried and is postponed the indication of IPv4 application IP addresses preference, otherwise, do not carry the indication of delay IPv4 application IP addresses preference;
Said ASN-GW is provided with the DHCP pattern after receiving said PBA message, if wherein carry said delay IPv4 application IP addresses preference indication, it is DHCP Relay pattern that the DHCP pattern then is set, otherwise is set to DHCP Proxy pattern, accomplishes the DHCP mode negotiation.
2. the method for claim 1 is characterized in that: carry grouped data network PDN type in the said PBU message, said PDN type is that said ASN-GW sets up situation according to user's initial service flow and confirms, is IPv4v6.
3. the method for claim 1; It is characterized in that: after accomplishing IPv4 and the foundation of IPv6 initial service flow between ASN-GW and the said UE; Said ASN-GW triggers timer; When dhcp discover message and route RS message has all been received or during timer expiry, said ASN-GW sends said PBU message to said PDN-GW.
4. method as claimed in claim 3; It is characterized in that: during said timer expiry; Said ASN-GW only receives route requests RS message; Also carry IPv6 network prefix solicited message in the PBU message that said ASN-GW sends, also carrying PDN-GW in the said PBA message is the IPv6 network prefix of UE application.
5. system that realizes the DHCP mode negotiation; It is characterized in that: said system comprises the access service network gateway ASN-GW of the World Interoperability for Microwave Access, WiMax WiMAX Access Network that connects through network and the packet data network gateway PDN-GW of 3GPP core net; Wherein
Said ASN-GW comprises that DHCP pattern determination module, the message processing module, the DHCP pattern that are connected with said DHCP pattern determination module are provided with module and with said message processing module and DHCP pattern the transceiver module that module links to each other are set, wherein,
Said DHCP pattern determination module is used for confirming the DHCP pattern of application and notifying said message processing module;
Said message processing module; Be used to generate the agent binding update PBU message of sending to said PDN-GW; In the PDN type is under the situation of IPv4v6; Carry the indication of delay IPv4 application IP addresses preference if confirm the then said PBU message of application DHCP Relay pattern, otherwise said PBU message is not carried and is postponed the indication of IPv4 application IP addresses preference;
Said DHCP pattern is provided with module; Be used for confirming the DHCP pattern and being provided with according to the PBA message that PDN-GW sends; Postpone the indication of IPv4 application IP addresses preference if carry in the said PBA message, then be set to DHCP Relay pattern, otherwise be set to DHCP Proxy pattern;
Said transceiver module is used for the PBU message that said message processing module generates is sent to said PDN-GW, also is used to receive the PBA message of said PDN-GW transmission and notify said DHCP pattern that module is set;
Said PDN-GW; Be used to receive said PBU message and send PBA message to said ASN-GW, if allow ASN-GW to adopt DHCP Relay pattern, then said PBA message is carried and is postponed the indication of IPv4 application IP addresses preference; Otherwise, do not carry the indication of delay IPv4 application IP addresses preference.
6. system as claimed in claim 5; It is characterized in that: PDN-GW is a particular content of confirming so said PBA message: postpone the indication of IPv4 application IP addresses preference if carry in the PBU message; Then in the PBA message of returning, carry IPv4 address and/or IPv6 network prefix, do not return the indication of delay IPv4 application IP addresses preference into the UE application; Postpone the indication of IPv4 application IP addresses preference if carry in the PBU message; Then whether decision allows ASN-GW to take DHCP Relay pattern according to collocation strategy; If allow; Then in the PBA message of returning, only apply for the IPv6 network prefix for UE and return postponing the indication of IPv4 application IP addresses preference, follow-up ASN-GW will be as DHCP relay; If do not allow, then carry IPv4 address and/or IPv6 network prefix into the UE application in the PBA message of returning, do not return the indication of delay IPv4 application IP addresses preference, follow-up ASN-GW will be as Dynamic Host Configuration Protocol server.
7. the access service network gateway of a WiMAX Access Network; It is characterized in that: said access service network gateway consults to confirm the DHCP pattern through the packet data network gateway PDN-GW with the 3GPP core net; Said access service network gateway comprises that DHCP pattern determination module, the message processing module, the DHCP pattern that are connected with said DHCP pattern determination module are provided with module and with said message processing module and DHCP pattern the transceiver module that module links to each other are set; Wherein
Said DHCP pattern determination module is used for confirming the DHCP pattern of application and notifying said message processing module;
Said message processing module; Be used to generate the agent binding update PBU message of sending to said PDN-GW; In the PDN type is under the situation of IPv4v6; Carry the indication of delay IPv4 application IP addresses preference if confirm the then said PBU message of application DHCP Relay pattern, otherwise said PBU message is not carried and is postponed the indication of IPv4 application IP addresses preference;
Said DHCP pattern is provided with module; Be used for confirming the DHCP pattern and being provided with according to the PBA message that PDN-GW sends; Postpone the indication of IPv4 application IP addresses preference if carry in the said PBA message, then be set to DHCP Relay pattern, otherwise be set to DHCP Proxy pattern;
Said transceiver module is used for the PBU message that said message processing module generates is sent to said PDN-GW, also is used to receive the PBA message of said PDN-GW transmission and notify said DHCP pattern that module is set.
8. access service network gateway as claimed in claim 7; It is characterized in that: said access service network gateway also comprises the PDN type determination module that is connected with said message processing module; Be used to detect the situation of setting up of initial service flow, and confirm the PDN type and notify said message processing module, set up if judge IPv4 and IPv6 initial service flow according to the initial service flow of setting up; Confirm that then the PDN type is IPv4v6, carries said PDN type in the said PBU message.
9. access service network gateway as claimed in claim 8; It is characterized in that: said PDN type determination module detects notifies said transceiver module after initial service flow is set up; Timer is set and triggered to said transceiver module; When timer expiry or dhcp discover message and RS message had all been received, said transceiver module was notified said message processing module and is sent said PBU message to said PDN-GW.
10. access service network gateway as claimed in claim 9; It is characterized in that: during said timer expiry; Said transceiver module is only received RS message; Also carry IPv6 network prefix solicited message in the PBU message that said transceiver module sends, also carrying PDN-GW in the PBA message that said transceiver module receives is the IPv6 network prefix of UE application.
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| CN103024865B (en) * | 2011-09-23 | 2018-04-13 | 中兴通讯股份有限公司 | A kind of core network access and network side initiate the method and system of attachment removal |
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| CN103796281A (en) * | 2012-11-05 | 2014-05-14 | 中兴通讯股份有限公司 | Management method, device and system for packet-data network type |
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