CN102238241A - Application method, device and system for prolonging prefix - Google Patents
Application method, device and system for prolonging prefix Download PDFInfo
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Abstract
The invention discloses an application method, an application device and an application system for prolonging a prefix, all of which can initiate a prefix prolonging request including prefix prolonging information from a user terminal to a network side, wherein the network side allocates a prolonged prefix to the user terminal according to the prefix prolonging information in the prefix prolonging request received. The method, device and system provided by the invention do not need to use a mechanism that stateful dhcpv6 allocates ipv6 addresses, which is benefit for smooth and seamless evolution of the network. in addition, the application process is not based on constant-length prefix, so the space of the IPv6 address prefix is not wasted even if the prolonged prefix exists. Moreover, the mode that the short Pv6 prefix is applied based on the prefix prolonging information is totally different from the mechanism that the IPv6 address is allocated based on stateful dhcpv6 in the prior art and can effectively prevent the problem that the short IPv6 prefix application in the prior art is complex, hidebound and inflexible.
Description
Technical field
The present invention relates to the communications field, be specifically related to a kind of application method, device and system of elongated prefix.
Background technology
(3rd Generation Partnership Project, 3GPP) (Evolved Packet System EPS) can show as framework shown in Figure 1 to the grouping system of evolution to third generation partner program.The EPS network architecture of non-roaming scene shown in Figure 1 is 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 PDN GW), home subscriber server (Home Subscriber Server, HSS), "Policy and Charging Rules Function (Policy andCharging Rules Function, PCRF) form by entity and other support nodes.
IPv6 (Internet Protocol Version 6) is the Internet engineering duty group (Internet EngineeringTask Force, IETF) IP next generation protocol that is used for substituting current edition IP agreement (IPv4) of design.The version number of IP agreement is 4 (abbreviating IPv4 as) at present, and its next version is exactly IPv6.Compare with IPv4, at first, IPv6 has bigger address space.Regulation IP address size is 32 among the IPv4, and the individual address of 2^32-1 (symbol ^ represents ascending power) is promptly arranged; And the length of IP address is 128 among the IPv6, and 2^128-1 address promptly arranged.Secondly, IPv6 uses littler routing table.The address assignment of IPv6 is followed the principle of cluster (Aggregation) at the very start, this makes that router can be with a record (Entry) expression a slice subnet in routing table, reduce the length of routing table in the router greatly, improved the speed of router forwarding packet.The 3rd, IPv6 has increased multicast (Multicast) support of enhancing and the support (FlowControl) of convection current, this makes multimedia application on the network that the chance of tremendous development arranged, and (Qualityof Service, QoS) control provides the good network platform for service quality.IPv6 has also added the support to automatic configuration (AutoConfiguration).This is to the improvement of DHCP agreement and expansion, makes that the management of network (especially local area network (LAN)) is convenient and quick.Simultaneously, IPv6 has increased security consideration when design.The user can encrypt and the IP message is carried out verification the data of network layer in using the IPv6 network, has strengthened the fail safe of network greatly.
3GPP supports the IPv6 function, and subscriber equipment (UE) can be set up IPv6 packet data network connected reference IPv6 business.3GPPUE sets up the connection that the packet data network type is IPv6 to network requests, and network receives that the request back is in conjunction with user signing contract information and network self support situation, to qualified UE distributing IP v6 network prefix.The automatic method of salary distribution of current 3GPP network unified employing stateless is user's distributing IP v6 prefix, as shown in Figure 2, after UE finishes the packet data network connection, can send route requests (Router Solicitation to P-GW, RS) to realize the distribution of network address prefix, P-GW receives that (Router Advertisement, RA) allocated length is 64 an IPv6 prefix to UE transmission route announcement in the request back.If UE does not send RS, P-GW also can periodically send the IPv6 prefix information that RA is distributed with announcement to UE.UE generates back 64 interface identifier (Interface Identifier) automatically to form 128 complete IPv6 addresses after receiving 64 IPv6 prefixes.
Support route forwarding function along with wireless network provides the increase of bandwidth ability, UE to can be used as mobile wireless gateway equipment, this moment, UE can be used as the outlet gateway of several subnets, was responsible for the configuration and the message forwarding capability of subnet.As shown in Figure 3, UE has been disposed three subnets as gateway, and UE is these three subnet distributing IP v6 prefixes (64).Under the scene of Fig. 3, network needs to distribute the IPv6 prefix that is shorter than 64 to continue to mark off on this short prefix basis/the subnet use of 64 prefixes after giving to UE.Generally, network can be the IPv6 prefix that UE distributes corresponding length in conjunction with user signing contract information according to the length of UE request.
In the DHCPv6 pd flow process of at present using RFC3633 to describe as shown in Figure 4, wherein by terminal as the client of DHCPv6 short prefix to EPC network application distributing IP v6, idiographic flow is described below:
Step 401 obtains the IPv6 prefix of 64 bit lengths after step 410:UE initialization and be attached to the EPC network by advertising of route message.Owing to be prior art, therefore repeat no more.
Step 411:UE initiates to have state DHCPv6 prefix authorization flow, sends the IPv6 short prefix of DHCPv6 solicitation message to ask certain-length that comprises the IPv6 prefix length information to P-GW (as authorizing router).
Need to prove that UE may carry quick affirmation option (RAPID_COMMIToption) so that simplify the DHCPv6 flow process in this message, directly enter step 415 in this case.
Step 412:P-GW sends the DHCPv6 bulletin can provide request with announcement business in the mode of broadcasting packet to UE.
Step 413:UE sends the DHCPv6 request message to P-GW after receiving the DHCPv6 broadcasting packet.
Step 414:P-GW sends the DHCPv6 response message to UE, wherein comprises the information such as the short prefix of IPv6 of distributing to UE.
Step 415:UE uses the short prefix of the IPv6 that gets access to carry out the IPv6 address assignment.
Though technology shown in Figure 4 can solve the problem of the short prefix of terminal to apply IPv6, has following defective when it is applied in the EPC system:
1.3GPP need introduce the mechanism of stateful dhcpv6 distributing IP v6 address again, and UE must support the client of dhcpv6; This variation obviously influence to network is bigger, and is unfavorable for level and smooth, the seamless evolution of network;
2. because the restriction of RFC3633 agreement itself must keep 64 fixed length prefix and elongated prefix simultaneously in the PDN connection of UE, and elongated prefix and fixed length prefix can not cover mutually; This space that causes the IPv6 address prefix is by unnecessary waste.
Have again, therefore the mechanism of above-mentioned stateful dhcpv6 distributing IP v6 address is based upon on the fixed length prefix, and certainly will there be numerous and diverse, inflexible, inflexible shortcoming in the short prefix application process that realizes based on the mechanism of stateful dhcpv6 distributing IP v6 address.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of application method and device of elongated prefix, with realize flexibly, elongated prefix application process efficiently.
Another object of the present invention is to provide a kind of application system of elongated prefix, can realize flexibly equally, elongated prefix application process efficiently.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of application method of elongated prefix, this method comprises:
UE initiates to comprise the elongated prefix request of elongated prefix length information to network side; Network side is that UE distributes elongated prefix according to the elongated prefix length information in the elongated prefix request of receiving.
The actual functional entity that carries out elongated prefix assignment of network side is P-GW, and described elongated prefix length information comprises elongated prefix sign and elongated prefix length.
Described elongated prefix request is for adhering to request, or bearing resource is revised request;
Described elongated prefix sign and elongated prefix length are carried in the protocol configuration option that above-mentioned request comprises.
When described elongated prefix request is asked for adhering to,
The process that UE initiates described elongated prefix request comprises:
The UE that possesses gateway function sends to mobile management unit and adheres to request; Mobile management unit sends to grouped data network gateway by gateway and sets up conversation request, and this is set up in the protocol configuration option field of conversation request and is provided with the elongated prefix length information that is used to apply for elongated prefix;
The process of the elongated prefix of described distribution comprises:
Grouped data network gateway is according to the elongated prefix length information of receiving entrained in the conversation request of setting up, the elongated prefix of representing UE to obtain to be asked, send to mobile management unit by gateway afterwards and set up conversational response message, this is set up and carries the elongated prefix that promising UE distributes in the conversational response message; Mobile management unit sends to adhere to UE accepts message, and this adheres to accepts to carry in the message the elongated prefix that promising UE distributes.
The process that on behalf of UE, grouped data network gateway obtain described elongated prefix comprises:
On behalf of UE, grouped data network gateway initiate to have state DHCPv6 prefix authorization flow as the client of DHCPv6, comprises the elongated prefix of the DHCPv6 solicitation message of elongated prefix length information with the request respective length to the Dynamic Host Configuration Protocol server transmission.
When described elongated prefix request is bearing resource modification request,
The process that UE initiates described elongated prefix request comprises:
The UE that possesses gateway function sends the bearing resource modify request messages to mobile management unit, carries the elongated prefix length information that is used to apply for elongated prefix in the protocol configuration option field of this bearing resource modify request messages;
Mobile management unit sends the bearing resource modify instruction by gateway to grouped data network gateway, carries the elongated prefix length information that is used to apply for elongated prefix in this bearing resource modify instruction;
The process of the elongated prefix of described distribution comprises:
Grouped data network gateway is according to the elongated prefix length information in the bearing resource modify instruction of receiving, represent UE to obtain elongated prefix, and send the bearer update request to mobile management unit by gateway, carry the elongated prefix that promising UE distributes in this bearer update request; Mobile management unit sends the session management request to UE, carries the elongated prefix that promising UE distributes in this session management request.
The process that on behalf of UE, grouped data network gateway obtain described elongated prefix comprises:
Grouped data network gateway is by obtaining elongated prefix alternately with the subscription authentication authorization server.
Described elongated prefix is the short prefix of IPv6.
A kind of application device of elongated prefix is positioned at user side, and this device comprises request form maintenance unit, elongated prefix request unit; Wherein,
Described request form maintenance unit wherein is provided with elongated prefix length information, is used for this information is comprised preservation, is provided at interior attended operation;
Described elongated prefix request unit is used for obtaining elongated prefix length information from described request form maintenance unit, the content that gets access to is carried on initiates elongated prefix application in the elongated prefix request.
This device is arranged among the UE; Described elongated prefix length information comprises elongated prefix sign and elongated prefix length; Described elongated prefix request is for adhering to request, or bearing resource is revised request; Described elongated prefix sign and elongated prefix length are carried in the protocol configuration option that above-mentioned request comprises.
Described elongated prefix is the short prefix of IPv6.
A kind of application device of elongated prefix is positioned at network side, and this device comprises request analysis unit, elongated prefix assignment unit; Wherein,
The described request resolution unit is used to receive the elongated prefix request from user side, and therefrom parses elongated prefix length information, the content that parses is sent to described elongated prefix assignment unit again;
Described elongated prefix assignment unit be used for obtaining elongated prefix according to the elongated prefix length information of receiving, and the elongated prefix that will obtain is handed down to subscriber equipment.
Described elongated prefix assignment unit comprises that elongated prefix acquiring unit and elongated prefix issue the unit; Wherein,
Described elongated prefix acquiring unit is used for obtaining elongated prefix according to the elongated prefix length information received, and the elongated prefix that will obtain sends to described elongated prefix and issues the unit;
Described elongated prefix issues the unit, and the elongated prefix that is used for receiving is handed down to subscriber equipment.
This device is arranged among the P-GW; Described elongated prefix length information comprises elongated prefix sign and elongated prefix length; Described elongated prefix request is for adhering to request, or bearing resource is revised request; Described elongated prefix sign and elongated prefix length are carried in the protocol configuration option that above-mentioned request comprises.
Described elongated prefix is the short prefix of IPv6.
A kind of application system of elongated prefix, this system comprise the request form maintenance unit that is positioned at user side, elongated prefix request unit, also comprise the request analysis unit that is positioned at network side, elongated prefix assignment unit; Wherein,
Described request form maintenance unit wherein is provided with elongated prefix length information, is used for this information is comprised preservation, is provided at interior attended operation;
Described elongated prefix request unit is used for obtaining elongated prefix length information from described request form maintenance unit, the content that gets access to is carried on initiates elongated prefix application in the elongated prefix request;
The described request resolution unit is used to receive the elongated prefix request from user side, and therefrom parses elongated prefix length information, the content that parses is sent to described elongated prefix assignment unit again;
Described elongated prefix assignment unit be used for obtaining elongated prefix according to the elongated prefix length information of receiving, and the elongated prefix that will obtain is handed down to subscriber equipment.
Described elongated prefix length information comprises elongated prefix sign and elongated prefix length; Described elongated prefix request is for adhering to request, or bearing resource is revised request; Described elongated prefix sign and elongated prefix length are carried in the protocol configuration option that above-mentioned request comprises.
Described elongated prefix is the short prefix of IPv6.
The inventive method, device and system do not need to introduce the mechanism of stateful dhcpv6 distributing IP v6 address, and UE do not need to support the client of dhcpv6 yet, and this helps level and smooth, the seamless evolution of network.Have again because application process is based on the fixed length prefix, so can be because of the existence of elongated prefix the space of unnecessary waste IPv6 address prefix.And, mode based on the short prefix of elongated prefix length information application IPv6, be different from fully in the prior art based on the mechanism of stateful dhcpv6 distributing IP v6 address, can effectively avoid numerous and diverse, inflexible, the inflexible problem of the short prefix application of IPv6 in the prior art.
Description of drawings
Fig. 1 is the EPS Organization Chart under the non-roaming scene of prior art;
Fig. 2 is the flow chart of the distributing IP v6 prefix of prior art;
Fig. 3 disposes schematic diagram for the IPv6 prefix of the UE with gateway function of prior art;
Fig. 4 is the flow chart of lacking prefix in the prior art based on DHCPv6Pd flow process application IPv6;
Fig. 5 is the elongated prefix application process figure of one embodiment of the invention;
Fig. 6 is the elongated prefix application process figure of another embodiment of the present invention;
Fig. 7 is an elongated prefix application process sketch of the present invention;
Fig. 8 is the elongated prefix application system figure of one embodiment of the invention.
Embodiment
The present invention is directed to the gateway type UE of route forwarding function, provide a kind of from the application of EPC network with obtain the technology of the elongated prefix of IPv6, this elongated prefix is generally short prefix.
Particularly, UE can increase the sign of the short prefix of request application IPv6 and the field of the short prefix length of IPv6 applied in the protocol configuration option (PCO) that Attach Request message or bearing resource modify request messages are comprised.The sign of the short prefix of described request application IPv6 can be described as elongated prefix sign usually, and described IPv6 is short, and prefix length can be described as elongated prefix length usually; Adhere to request, the bearing resource modification request etc. that have increased above-mentioned elongated prefix sign and elongated prefix length are used to apply for that the request of elongated prefix all can be described as elongated prefix request.In addition, entrained elongated prefix sign and elongated prefix length can be referred to as elongated prefix length information in the elongated prefix request.
Based on described elongated prefix request, UE can distribute the short prefix of the IPv6 that is shorter than 64 to the grouped data network gateway application.P-GW can be in several ways for UE obtains the short prefix of the IPv6 that is shorter than 64 after receiving elongated prefix request, and these modes include but not limited to: P-GW obtains the elongated prefix that UE asks as dhcpv6 pd client from dhcpv6 server (server); Perhaps obtain the elongated prefix that UE asks from aaa server.
Afterwards, grouped data network gateway can issue obtained elongated prefix to UE by adhering to the packet data gateway address field of accepting in the message, perhaps by the protocol configuration option field in the session management request message obtained elongated prefix is handed down to UE.
In actual applications, above-described elongated prefix application process can be represented as Fig. 5, flow process shown in Figure 6.
Referring to Fig. 5, Fig. 5 is the elongated prefix application process figure of one embodiment of the invention.As shown in Figure 5, the UE that possesses the gateway ability carries the length information of the short prefix of IPv6 that needs application in the process that initially is attached to network.Mobile management unit checks whether user signing contract information allows for the short prefix of this UE application, if allow then transmit this length information and give P-GW.P-GW obtains short prefix by the DHCPv6Pd flow process from the dhcpv6 server according to the length information received, accepts the short prefix that message will obtain and is handed down to UE by adhering to again, and flow process shown in Figure 5 specifically may further comprise the steps:
Step 501: the UE that possesses gateway function sends to mobile management unit and adheres to request, and this adheres to and comprises protocol configuration option etc. in the request; In protocol configuration option, increase the elongated prefix length information that is used to apply for the short prefix of IPv6.
Step 502: mobile management unit sends the renewal location request message that comprises mobile management entity sign, ability, updating type, identity information etc. to home subscriber server.
Step 503: home subscriber server sends to mobile management unit and upgrades the position acknowledge message to confirm to upgrade position requests, comprises user identity and CAMEL-Subscription-Information in the acknowledge message of renewal position.
Step 504: mobile management unit sends to gateway and sets up conversation request, and this is set up in the protocol configuration option field of conversation request and is provided with the elongated prefix length information that is used to apply for the short prefix of IPv6.
Step 505: gateway sends to the grouped data network gateway of correspondence and sets up conversation request, sets up to be provided with in the protocol configuration option field of session this request to be used to apply for that IPv6 lacks the elongated prefix length information of prefix.
Step 506: grouped data network gateway is according to the elongated prefix length information of receiving entrained in the conversation request of setting up, the short prefix of the IPv6 that represents UE to obtain to be asked, this acquisition methods can have multiple, as: from the subscription authentication authorization server, obtain, also can initiatively distribute by grouped data network gateway.
In the present embodiment, on behalf of UE, grouped data network gateway initiate to have state DHCPv6 prefix authorization flow as the client of DHCPv6, sends the IPv6 short prefix of DHCPv6 solicitation message to ask respective length that comprises elongated prefix length information to Dynamic Host Configuration Protocol server (as authorizing router).
Need to prove that grouped data network gateway may carry quick affirmation option (RAPID_COMMIT option) to simplify the DHCPv6 flow process in described DHCPv6 solicitation message, directly enter step 509 this moment.
Step 507:DHCP server sends the DHCPv6 bulletin can provide request with announcement business by broadcasting packet to grouped data network gateway.
Step 508: grouped data network gateway receives that DHCPv6 bulletin back sends the DHCPv6 request message to Dynamic Host Configuration Protocol server.
Step 509:DHCP server sends the DHCPv6 response message to grouped data network gateway, comprises the information such as the short prefix of IPv6 of distributing to UE in this DHCPv6 response message.
Step 510: grouped data network gateway sends to gateway and sets up conversational response message, and this is set up and carries the short prefix of IPv6 that promising UE distributes in the conversational response protocol of messages configuration option field.
Step 511: gateway sends to mobile management unit and sets up conversational response message, and this is set up and carries the short prefix of IPv6 that promising UE distributes in the conversational response protocol of messages configuration option field.
Step 512: mobile management unit sends to adhere to UE accepts message, and this adheres to the short prefix of the IPv6 that carries promising UE distribution in the grouped data network gateway address field of accepting message.
Step 513:UE finishes to adhere to and set up packet data network and connects, and can also use the short prefix of the IPv6 that gets access to carry out the IPv6 address assignment at subnet.
Referring to Fig. 6, Fig. 6 is the elongated prefix application process figure of another embodiment of the present invention.As shown in Figure 6, the UE that possesses the gateway ability according to existing 3GPP flow process, obtains the prefix of 64 regular lengths earlier by route announcement message in the process that initially is attached to network.If UE need move gateway function, then send the bearing resource modify request messages, and in the protocol configuration option field of this bearing resource modify request messages, increase elongated prefix sign and the elongated prefix length that is used to apply for the short prefix of IPv6 to network side.After grouped data network gateway receives bearing resource modification request, according to elongated prefix sign that is wherein comprised and elongated prefix length is the short prefix of UE application IPv6, and in the protocol configuration option field of session management request message the short prefix of IPv6 of being distributed is handed down to UE.Flow process shown in Figure 6 specifically may further comprise the steps:
Step 601 obtains the IPv6 prefix of 64 bit lengths after step 610:UE initialization and be attached to the EPC network by advertising of route message.Owing to be prior art, therefore repeat no more.
Step 611: when the UE that possesses gateway function starts gateway function, need obtain the short prefix of IPv6, UE sends the bearing resource modify request messages to mobile management unit, increases the elongated prefix length information that is used to apply for the short prefix of IPv6 in the protocol configuration option field of this bearing resource modify request messages.
Step 612: mobile management unit sends the bearing resource modify instruction to gateway, increases the elongated prefix length information that is used to apply for the short prefix of IPv6 in the protocol configuration option field of this bearing resource modify instruction.
Step 613: gateway sends the bearing resource modify instruction to grouped data network gateway, increases the elongated prefix length information that is used to apply for the short prefix of IPv6 in the protocol configuration option field of this bearing resource modify instruction.
Step 614: grouped data network gateway is according to the elongated prefix length information in the bearing resource modify instruction of receiving, represent UE to obtain the short prefix of IPv6, this acquisition methods can have multiple, as: from the subscription authentication authorization server, obtain, also can initiatively distribute by grouped data network gateway.
In the present embodiment, grouped data network gateway is by obtaining the short prefix of IPv6 alternately with the subscription authentication authorization server.
Step 615: grouped data network gateway sends the bearer update request to gateway, carries the short prefix of the IPv6 that distributes into UE in the protocol configuration option field of this bearer update request.
Step 616: gateway sends the bearer update request to the mobile management unit of correspondence, carries the short prefix of the IPv6 that distributes into UE in the protocol configuration option field of this bearer update request.
Step 617: mobile management unit sends the session management request to UE, carries the short prefix of the IPv6 that distributes into UE in the protocol configuration option field of this session management request.
Step 618:UE uses the short prefix of the IPv6 that gets access to carry out the IPv6 address assignment at subnet.
By the above flow process as seen, elongated prefix application thinking of the present invention can show as shown in Figure 7.Referring to Fig. 7, Fig. 7 is an elongated prefix application process sketch of the present invention, and this flow process may further comprise the steps:
Step 710:UE initiates to comprise the elongated prefix request of elongated prefix sign and elongated prefix length to P-GW.
Step 720:P-GW is according to the content in the elongated prefix request of receiving, obtains the elongated prefix that UE asks and is handed down to UE.
In order to realize above-mentioned elongated prefix application process smoothly, can carry out setting as shown in Figure 8.Referring to Fig. 8, Fig. 8 is the elongated prefix application system figure of one embodiment of the invention, and this system comprises the UE and the P-GW of can link to each other (connected directly or indirectly).Wherein, UE comprises continuous request form maintenance unit, elongated prefix request unit; P-GW comprises that continuous request analysis unit, elongated prefix acquiring unit, elongated prefix issue the unit, and elongated prefix acquiring unit and elongated prefix issue the unit and can close and be made as elongated prefix assignment unit.
During concrete the application, be provided with the form of elongated prefix sign and elongated prefix length in the request form maintenance unit among the UE, and can comprise preservations to this form, be provided at interior attended operation.Elongated prefix request unit can obtain elongated prefix sign and elongated prefix length from request form maintenance unit, the content that gets access to is carried on network equipments such as sending to P-GW in the elongated prefix request, to apply for elongated prefix.
Request analysis unit among the P-GW can receive the elongated prefix request from UE, and therefrom parses elongated prefix sign and elongated prefix length, the content that parses is sent to elongated prefix acquiring unit again.Elongated prefix acquiring unit can obtain the short prefix of IPv6 according to elongated prefix sign of receiving and elongated prefix length, and the short prefix of the IPv6 that obtains is sent to elongated prefix issue the unit, issue the unit by elongated prefix the short prefix of receiving of IPv6 is handed down to subscriber equipment.
Need to prove that except the application that can be applied to the short prefix of IPv6, the technology of the present invention can also be applied to other elongated prefix application, as long as can realize being similar to aforementioned flow process smoothly and install the operation that can realize.And for the functional entity of the short prefix of UE actual allocated IPv6 can not be P-GW also, but the operation maintenance center of network side etc. can carry out the functional entity of information management and distribution.
In sum as seen, no matter be method or device, elongated prefix application technology of the present invention does not need to introduce the mechanism of stateful dhcpv6 distributing IP v6 address, and UE do not need to support the client of dhcpv6 yet, and this helps level and smooth, the seamless evolution of network.
Have again because application process is based on the fixed length prefix, so can be because of the existence of elongated prefix the space of unnecessary waste IPv6 address prefix.And, mode based on the short prefix of elongated prefix length information application IPv6, be different from fully in the prior art based on the mechanism of stateful dhcpv6 distributing IP v6 address, can effectively avoid numerous and diverse, inflexible, the inflexible problem of the short prefix application of IPv6 in the prior art.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1. the application method of an elongated prefix is characterized in that, this method comprises:
User equipment (UE) initiates to comprise the elongated prefix request of elongated prefix length information to network side; Network side is that UE distributes elongated prefix according to the elongated prefix length information in the elongated prefix request of receiving.
2. method according to claim 1 is characterized in that, the actual functional entity that carries out elongated prefix assignment of network side is grouped data network gateway P-GW, and described elongated prefix length information comprises elongated prefix sign and elongated prefix length.
3. method according to claim 2 is characterized in that, described elongated prefix request is for adhering to request, or bearing resource is revised request;
Described elongated prefix sign and elongated prefix length are carried in the protocol configuration option that above-mentioned request comprises.
4. method according to claim 3 is characterized in that, when described elongated prefix request is asked for adhering to,
The process that UE initiates described elongated prefix request comprises:
The UE that possesses gateway function sends to mobile management unit and adheres to request; Mobile management unit sends to grouped data network gateway by gateway and sets up conversation request, and this is set up in the protocol configuration option field of conversation request and is provided with the elongated prefix length information that is used to apply for elongated prefix;
The process of the elongated prefix of described distribution comprises:
Grouped data network gateway is according to the elongated prefix length information of receiving entrained in the conversation request of setting up, the elongated prefix of representing UE to obtain to be asked, send to mobile management unit by gateway afterwards and set up conversational response message, this is set up and carries the elongated prefix that promising UE distributes in the conversational response message; Mobile management unit sends to adhere to UE accepts message, and this adheres to accepts to carry in the message the elongated prefix that promising UE distributes.
5. method according to claim 4 is characterized in that, the process that on behalf of UE, grouped data network gateway obtain described elongated prefix comprises:
On behalf of UE, grouped data network gateway initiate to have state DHCPv6 prefix authorization flow as the client of DHCPv6, comprises the elongated prefix of the DHCPv6 solicitation message of elongated prefix length information with the request respective length to the Dynamic Host Configuration Protocol server transmission.
6. method according to claim 3 is characterized in that, when described elongated prefix request is bearing resource modification request,
The process that UE initiates described elongated prefix request comprises:
The UE that possesses gateway function sends the bearing resource modify request messages to mobile management unit, carries the elongated prefix length information that is used to apply for elongated prefix in the protocol configuration option field of this bearing resource modify request messages;
Mobile management unit sends the bearing resource modify instruction by gateway to grouped data network gateway, carries the elongated prefix length information that is used to apply for elongated prefix in this bearing resource modify instruction;
The process of the elongated prefix of described distribution comprises:
Grouped data network gateway is according to the elongated prefix length information in the bearing resource modify instruction of receiving, represent UE to obtain elongated prefix, and send the bearer update request to mobile management unit by gateway, carry the elongated prefix that promising UE distributes in this bearer update request; Mobile management unit sends the session management request to UE, carries the elongated prefix that promising UE distributes in this session management request.
7. method according to claim 6 is characterized in that, the process that on behalf of UE, grouped data network gateway obtain described elongated prefix comprises:
Grouped data network gateway is by obtaining elongated prefix alternately with the subscription authentication authorization server.
8. according to each described method of claim 1 to 7, it is characterized in that described elongated prefix is the short prefix of IPv6.
9. the application device of an elongated prefix is positioned at user side, it is characterized in that, this device comprises request form maintenance unit, elongated prefix request unit; Wherein,
Described request form maintenance unit wherein is provided with elongated prefix length information, is used for this information is comprised preservation, is provided at interior attended operation;
Described elongated prefix request unit is used for obtaining elongated prefix length information from described request form maintenance unit, the content that gets access to is carried on initiates elongated prefix application in the elongated prefix request.
10. device according to claim 9 is characterized in that,
This device is arranged among the UE; Described elongated prefix length information comprises elongated prefix sign and elongated prefix length; Described elongated prefix request is for adhering to request, or bearing resource is revised request; Described elongated prefix sign and elongated prefix length are carried in the protocol configuration option that above-mentioned request comprises.
11., it is characterized in that described elongated prefix is the short prefix of IPv6 according to claim 9 or 10 described devices.
12. the application device of an elongated prefix is positioned at network side, it is characterized in that, this device comprises request analysis unit, elongated prefix assignment unit; Wherein,
The described request resolution unit is used to receive the elongated prefix request from user side, and therefrom parses elongated prefix length information, the content that parses is sent to described elongated prefix assignment unit again;
Described elongated prefix assignment unit be used for obtaining elongated prefix according to the elongated prefix length information of receiving, and the elongated prefix that will obtain is handed down to subscriber equipment.
13. device according to claim 12 is characterized in that, described elongated prefix assignment unit comprises that elongated prefix acquiring unit and elongated prefix issue the unit; Wherein,
Described elongated prefix acquiring unit is used for obtaining elongated prefix according to the elongated prefix length information received, and the elongated prefix that will obtain sends to described elongated prefix and issues the unit;
Described elongated prefix issues the unit, and the elongated prefix that is used for receiving is handed down to subscriber equipment.
14. device according to claim 13 is characterized in that,
This device is arranged among the P-GW; Described elongated prefix length information comprises elongated prefix sign and elongated prefix length; Described elongated prefix request is for adhering to request, or bearing resource is revised request; Described elongated prefix sign and elongated prefix length are carried in the protocol configuration option that above-mentioned request comprises.
15., it is characterized in that described elongated prefix is the short prefix of IPv6 according to each described device of claim 12 to 14.
16. the application system of an elongated prefix is characterized in that, this system comprises the request form maintenance unit that is positioned at user side, elongated prefix request unit, also comprises the request analysis unit that is positioned at network side, elongated prefix assignment unit; Wherein,
Described request form maintenance unit wherein is provided with elongated prefix length information, is used for this information is comprised preservation, is provided at interior attended operation;
Described elongated prefix request unit is used for obtaining elongated prefix length information from described request form maintenance unit, the content that gets access to is carried on initiates elongated prefix application in the elongated prefix request;
The described request resolution unit is used to receive the elongated prefix request from user side, and therefrom parses elongated prefix length information, the content that parses is sent to described elongated prefix assignment unit again;
Described elongated prefix assignment unit be used for obtaining elongated prefix according to the elongated prefix length information of receiving, and the elongated prefix that will obtain is handed down to subscriber equipment.
17. system according to claim 16 is characterized in that, described elongated prefix length information comprises elongated prefix sign and elongated prefix length; Described elongated prefix request is for adhering to request, or bearing resource is revised request; Described elongated prefix sign and elongated prefix length are carried in the protocol configuration option that above-mentioned request comprises.
18., it is characterized in that described elongated prefix is the short prefix of IPv6 according to claim 16 or 17 described systems.
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