CN102238241B - A kind of application method of elongated prefix, device and system - Google Patents
A kind of application method of elongated prefix, device and system Download PDFInfo
- Publication number
- CN102238241B CN102238241B CN201010159392.8A CN201010159392A CN102238241B CN 102238241 B CN102238241 B CN 102238241B CN 201010159392 A CN201010159392 A CN 201010159392A CN 102238241 B CN102238241 B CN 102238241B
- Authority
- CN
- China
- Prior art keywords
- variable
- length
- prefix
- request
- length prefix
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 59
- 230000008569 process Effects 0.000 claims abstract description 30
- 230000004048 modification Effects 0.000 claims description 38
- 238000012986 modification Methods 0.000 claims description 38
- 238000012423 maintenance Methods 0.000 claims description 20
- 230000004044 response Effects 0.000 claims description 14
- 238000013475 authorization Methods 0.000 claims description 11
- 230000000977 initiatory effect Effects 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 abstract description 9
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- GVVPGTZRZFNKDS-JXMROGBWSA-N geranyl diphosphate Chemical compound CC(C)=CCC\C(C)=C\CO[P@](O)(=O)OP(O)(O)=O GVVPGTZRZFNKDS-JXMROGBWSA-N 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of application method of elongated prefix, device and system, all can initiate to network side the elongated prefix request comprising elongated prefix length information by subscriber equipment; Network side is the elongated prefix of user equipment allocation according to the elongated prefix length information in the elongated prefix request received.Methods, devices and systems of the present invention do not need the mechanism introducing stateful dhcpv6 distributing IP v6 address, and this is conducive to level and smooth, the seamless evolution of network.Further, because application process is not based on fixed length prefix, thus can not because of the existence of elongated prefix the space of unnecessary waste IPv6 address prefix.And, based on the mode of the short prefix of elongated prefix length information application IPv6, be different from the mechanism based on stateful dhcpv6 distributing IP v6 address in prior art completely, effectively can avoid numerous and diverse, inflexible, the inflexible problem of the short prefix of IPv6 in prior art application.
Description
Technical Field
The invention relates to the field of communication, in particular to a method, a device and a system for applying a variable-length prefix.
Background
An Evolved Packet System (EPS) of the 3rd Generation Partnership Project (3 GPP) may be represented as the architecture shown in fig. 1. The EPS Network architecture in the non-roaming scenario shown in fig. 1 is composed of an Evolved Universal mobile telecommunications system Terrestrial Radio Access Network (E-UTRAN), a mobile Management unit (MME), a Serving Gateway (S-GW), a Packet Data Network Gateway (P-GW or PDN GW), a Home Subscriber Server (HSS), a Policy and Charging Rules Function (PCRF) Entity, and other support nodes.
IPv6(Internet Protocol Version 6) is a next-generation IP Protocol designed by the Internet Engineering Task Force (IETF) to replace the current Version of the IP Protocol (IPv 4). The current version number of the IP protocol is 4 (abbreviated IPv4) and its next version is IPv 6. First, IPv6 has a larger address space than IPv 4. The IP address length specified in IPv4 is 32, i.e. 2^32-1 (the symbol ^ represents raised power) addresses; and the length of the IP address in IPv6 is 128, namely 2^128-1 addresses. Second, IPv6 uses a smaller routing table. The address allocation of the IPv6 follows the clustering (Aggregation) principle from the beginning, which enables the router to represent a subnet by one record (Entry) in the routing table, greatly reducing the length of the routing table in the router, and increasing the packet forwarding speed of the router. Third, the IPv6 adds enhanced Multicast (Multicast) support and flow support (FlowControl), which makes multimedia applications on the network have a long-growing opportunity, and provides a good network platform for quality of Service (QoS) control. IPv6 also incorporates support for automatic configuration (AutoConfiguration). This is an improvement and extension of the DHCP protocol to make management of networks (especially local area networks) more convenient and faster. At the same time, IPv6 adds security concerns at the time of design. In the network using the IPv6, the user can encrypt the data of the network layer and check the IP message, thereby greatly enhancing the security of the network.
The 3GPP supports IPv6 functionality, and User Equipment (UE) is able to establish IPv6 packet data network connections to access IPv6 services. The 3GPPUE requests the network to establish the connection with the packet data network type of IPv6, and the network distributes IPv6 network prefixes to the UE meeting the conditions after receiving the request and combining the user subscription information and the self-supporting condition of the network. Currently, a 3GPP network uniformly adopts a stateless automatic allocation manner to allocate IPv6 prefixes to users, as shown in fig. 2, after a UE completes packet data network connection, the UE may send a routing Request (RS) to a P-GW to implement allocation of network address prefixes, and the P-GW sends a Routing Advertisement (RA) to the UE after receiving the request to allocate IPv6 prefixes with a length of 64 bits. The P-GW also periodically sends a RA to the UE to advertise the assigned IPv6 prefix information if the UE does not send an RS. After receiving the 64-bit IPv6 prefix, the UE automatically generates a 64-bit Interface Identifier (Interface Identifier) to form a complete 128-bit IPv6 address.
With the increase of bandwidth capacity provided by a wireless network, the UE can serve as mobile wireless gateway equipment to support a routing forwarding function, and at the moment, the UE can serve as an exit gateway of several subnets and is responsible for the configuration of the subnets and the message forwarding function. As shown in fig. 3, the UE is deployed with three subnets as gateways, and the UE allocates IPv6 prefixes (64 bits) to the three subnets. In the scenario of fig. 3, the network needs to allocate IPv6 prefix shorter than 64 bits to the UE to continue dividing/64 prefixes for subsequent subnet usage on the basis of the short prefix. In general, the network may allocate an IPv6 prefix of a corresponding length to the UE according to the length requested by the UE in combination with the user subscription information.
The DHCPv6pd flow described in RFC3633 at present is shown in fig. 4, where a terminal as a client of the DHCPv6 applies for allocating a short prefix of IPv6 to an EPC network, and the specific flow is described as follows:
step 401 to step 410: after the UE initializes and attaches to the EPC network, it gets an IPv6 prefix of 64-bit length through a route advertisement message. Because of the prior art, it is not described in detail.
Step 411: the UE initiates a stateful DHCPv6 prefix authorization flow, and sends a DHCPv6 solicitation message containing IPv6 prefix length information to a P-GW (as an authorization router) to request an IPv6 short prefix with a certain length.
It should be noted that the UE may carry a RAPID acknowledgement option (RAPID _ commit) in the message to simplify the flow of the DHCPv6, in which case the step 415 is directly entered.
Step 412: the P-GW sends DHCPv6 advertisement to the UE in a broadcast message to advertise that the requested service can be provided.
Step 413: and the UE sends a DHCPv6 request message to the P-GW after receiving the DHCPv6 broadcast message.
Step 414: the P-GW sends a DHCPv6 response message to the UE, wherein the DHCPv6 response message contains information such as IPv6 short prefix and the like allocated to the UE.
Step 415: and the UE performs IPv6 address allocation by using the acquired IPv6 short prefix.
Although the technology shown in fig. 4 can solve the problem of the terminal application IPv6 short prefix, when the technology is applied to the EPC system, the following defects exist:
1.3GPP needs to reintroduce the mechanism of stateful dhcpv6 to allocate IPv6 address, and UE must support client of dhcpv 6; the influence of the change on the network is obviously large, and the smooth and seamless evolution of the network is not facilitated;
2. due to the limitation of the RFC3633 protocol, a fixed-length prefix and a variable-length prefix of 64 bits must be reserved simultaneously on one PDN connection of the UE, and the variable-length prefix and the fixed-length prefix cannot be mutually covered; this results in unnecessary waste of space for IPv6 address prefixes.
Furthermore, the mechanism for allocating IPv6 addresses by stateful dhcpv6 is established on fixed-length prefixes, so that the short prefix application process implemented by the mechanism for allocating IPv6 addresses based on stateful dhcpv6 is bound to have the disadvantages of complexity, deadliness and inflexibility.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method and an apparatus for applying a variable-length prefix, so as to implement a flexible and efficient variable-length prefix application process.
Another objective of the present invention is to provide a variable-length prefix application system, which can also implement a flexible and efficient variable-length prefix application process.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for applying for a variable-length prefix, the method comprising:
UE initiates a variable length prefix request containing variable length prefix length information to a network side; and the network side allocates a variable-length prefix to the UE according to the variable-length prefix length information in the received variable-length prefix request.
The functional entity for actually carrying out variable length prefix distribution on the network side is P-GW, and the variable length prefix length information comprises a variable length prefix mark and a variable length prefix length.
The variable length prefix request is an attachment request or a bearing resource modification request;
the variable length prefix tag and the variable length prefix length are carried in a protocol configuration option included in the request.
When the variable-length prefix request is an attach request,
the process of UE initiating the variable length prefix request comprises the following steps:
the UE with the gateway function sends an attachment request to a mobile management unit; the mobile management unit sends a session establishing request to a packet data network gateway through a service gateway, and the protocol configuration option field of the session establishing request is provided with variable-length prefix length information for applying for variable-length prefixes;
the process of allocating the variable length prefix includes:
the packet data network gateway obtains the requested variable-length prefix on behalf of the UE according to the variable-length prefix length information carried in the received session establishing request, and then sends a session establishing response message to the mobile management unit through the serving gateway, wherein the session establishing response message carries the variable-length prefix distributed to the UE; the mobile management unit sends an attachment acceptance message to the UE, wherein the attachment acceptance message carries a variable-length prefix distributed to the UE.
The process that the packet data network gateway obtains the variable length prefix on behalf of the UE comprises the following steps:
the packet data network gateway as the client of the DHCPv6 initiates a stateful DHCPv6 prefix authorization process on behalf of the UE, and sends a DHCPv6 solicitation message containing variable-length prefix length information to the DHCP server to request a variable-length prefix of a corresponding length.
When the variable-length prefix request is a bearer resource modification request,
the process of UE initiating the variable length prefix request comprises the following steps:
the UE with gateway function sends a request message for modifying the bearer resource to a mobile management unit, wherein the protocol configuration option field of the request message for modifying the bearer resource carries information for applying for the length-variable prefix length;
the mobile management unit sends a bearing resource modification instruction to the packet data network gateway through the service gateway, wherein the bearing resource modification instruction carries variable-length prefix length information for applying for variable-length prefixes;
the process of allocating the variable length prefix includes:
the packet data network gateway obtains the variable-length prefix on behalf of the UE according to the variable-length prefix length information in the received bearer resource modification instruction, and sends a bearer update request to the mobile management unit through the serving gateway, wherein the bearer update request carries the variable-length prefix allocated to the UE; the mobile management unit sends a session management request to the UE, wherein the session management request carries a variable-length prefix distributed to the UE.
The process that the packet data network gateway obtains the variable length prefix on behalf of the UE comprises the following steps:
the packet data network gateway obtains the variable-length prefix by interacting with the user authentication authorization server.
The variable length prefix is an IPv6 short prefix.
A variable-length prefix application device is positioned at a user side and comprises a request format maintenance unit and a variable-length prefix request unit; wherein,
the request format maintenance unit is provided with variable-length prefix length information and is used for performing maintenance operations including storage and supply on the information;
the variable-length prefix request unit is used for acquiring variable-length prefix length information from the request format maintenance unit and carrying the acquired content in a variable-length prefix request to initiate a variable-length prefix application.
The device is arranged in the UE; the variable-length prefix length information comprises a variable-length prefix mark and a variable-length prefix length; the variable length prefix request is an attachment request or a bearing resource modification request; the variable length prefix tag and the variable length prefix length are carried in a protocol configuration option included in the request.
The variable length prefix is an IPv6 short prefix.
A device for applying for variable length prefix is located at network side, and comprises a request analysis unit and a variable length prefix distribution unit; wherein,
the request analysis unit is used for receiving a variable-length prefix request from a user side, analyzing variable-length prefix length information from the request analysis unit, and sending the analyzed content to the variable-length prefix distribution unit;
the variable-length prefix allocation unit is used for acquiring a variable-length prefix according to the received variable-length prefix length information and transmitting the acquired variable-length prefix to the user equipment.
The variable-length prefix distribution unit comprises a variable-length prefix acquisition unit and a variable-length prefix issuing unit; wherein,
the variable-length prefix obtaining unit is used for obtaining a variable-length prefix according to the received variable-length prefix length information and sending the obtained variable-length prefix to the variable-length prefix issuing unit;
the variable-length prefix issuing unit is used for issuing the received variable-length prefix to the user equipment.
The device is arranged in a P-GW; the variable-length prefix length information comprises a variable-length prefix mark and a variable-length prefix length; the variable length prefix request is an attachment request or a bearing resource modification request; the variable length prefix tag and the variable length prefix length are carried in a protocol configuration option included in the request.
The variable length prefix is an IPv6 short prefix.
A application system of variable length prefix includes a request format maintenance unit and a variable length prefix request unit which are positioned at a user side, and also includes a request analysis unit and a variable length prefix distribution unit which are positioned at a network side; wherein,
the request format maintenance unit is provided with variable-length prefix length information and is used for performing maintenance operations including storage and supply on the information;
the variable-length prefix request unit is used for acquiring variable-length prefix length information from the request format maintenance unit and carrying the acquired content in a variable-length prefix request to initiate a variable-length prefix application;
the request analysis unit is used for receiving a variable-length prefix request from a user side, analyzing variable-length prefix length information from the request analysis unit, and sending the analyzed content to the variable-length prefix distribution unit;
the variable-length prefix allocation unit is used for acquiring a variable-length prefix according to the received variable-length prefix length information and transmitting the acquired variable-length prefix to the user equipment.
The variable-length prefix length information comprises a variable-length prefix mark and a variable-length prefix length; the variable length prefix request is an attachment request or a bearing resource modification request; the variable length prefix tag and the variable length prefix length are carried in a protocol configuration option included in the request.
The variable length prefix is an IPv6 short prefix.
The method, the device and the system do not need to introduce a mechanism of stateful dhcpv6 for allocating IPv6 addresses, and the UE does not need a client supporting dhcpv6, which is beneficial to smooth and seamless evolution of a network. Furthermore, since the application process is not based on the fixed-length prefix, the space of the IPv6 address prefix is not wasted unnecessarily due to the existence of the variable-length prefix. In addition, the method for applying for the IPv6 short prefix based on the variable length prefix length information is completely different from a mechanism for distributing IPv6 addresses based on stateful dhcpv6 in the prior art, and can effectively solve the problems of complexity, rigid and inflexible application of the IPv6 short prefix in the prior art.
Drawings
Fig. 1 is an EPS architecture diagram in a non-roaming scenario of the prior art;
FIG. 2 is a flow chart of a prior art allocating IPv6 prefixes;
fig. 3 is a schematic diagram of IPv6 prefix deployment of a UE with gateway function in the prior art;
FIG. 4 is a flowchart of applying for IPv6 short prefix based on DHCPv6Pd flow in the prior art;
FIG. 5 is a flowchart illustrating a variable-length prefix application process according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating a variable-length prefix application process according to another embodiment of the present invention;
FIG. 7 is a simplified diagram of a variable-length prefix application process of the present invention;
fig. 8 is a system diagram of variable-length prefix application according to an embodiment of the present invention.
Detailed Description
The invention provides a technology for applying and acquiring an IPv6 variable-length prefix from an EPC network aiming at gateway type UE with a routing forwarding function, wherein the variable-length prefix is usually a short prefix.
Specifically, the UE may add a flag requesting application for IPv6 short prefix and a field of the applied IPv6 short prefix length in a Protocol Configuration Option (PCO) included in the attach request message or the bearer resource modification request message. The flag of the request application IPv6 short prefix can be generally called as variable-length prefix flag, and the IPv6 short prefix length can be generally called as variable-length prefix length; the request for applying for the variable length prefix, such as the attachment request added with the variable length prefix mark and the variable length prefix length, the bearer resource modification request, and the like, can be called as a variable length prefix request. In addition, the variable-length prefix flag and the variable-length prefix length carried in the variable-length prefix request may be collectively referred to as variable-length prefix length information.
Based on the variable-length prefix request, the UE may apply for allocation of an IPv6 short prefix shorter than 64 bits to the packet data network gateway. After receiving the variable-length prefix request, the P-GW may obtain an IPv6 short prefix shorter than 64 bits for the UE in a variety of ways, including but not limited to: the P-GW as a dhcpv6pd client obtains the variable-length prefix requested by the UE from a dhcpv6 server (server); or obtain the variable-length prefix requested by the UE from the AAA server.
Then, the packet data network gateway may issue the obtained variable length prefix to the UE through the packet data gateway address field in the attach accept message, or issue the obtained variable length prefix to the UE through the protocol configuration option field in the session management request message.
In practical applications, the variable-length prefix application process described above may represent the flows shown in fig. 5 and fig. 6.
Referring to fig. 5, fig. 5 is a flowchart of a variable-length prefix application according to an embodiment of the present invention. As shown in fig. 5, the gateway-capable UE carries the length information of the IPv6 short prefix to be applied for during the initial attachment to the network. The mobile management unit checks whether the user subscription information allows to apply for the short prefix for the UE, and if so, forwards the length information to the P-GW. The P-GW obtains the short prefix from the DHCPv6 server through the DHCPv6Pd procedure according to the received length information, and then issues the obtained short prefix to the UE through the attach accept message, where the procedure shown in fig. 5 specifically includes the following steps:
step 501: the method comprises the steps that UE with a gateway function sends an attachment request to a mobile management unit, wherein the attachment request comprises protocol configuration options and the like; adding variable-length prefix length information for applying for IPv6 short prefix in protocol configuration options.
Step 502: the mobility management unit sends an update location request message containing mobility management entity identity, capabilities, update type, identity information, etc. to the home subscriber server.
Step 503: the home subscriber server sends a location updating confirmation message to the mobile management unit to confirm the location updating request, wherein the location updating confirmation message comprises the user identity and the subscription information.
Step 504: the mobile management unit sends a session establishment request to the service gateway, wherein the protocol configuration option field of the session establishment request is provided with variable-length prefix length information for applying for the IPv6 short prefix.
Step 505: the service gateway sends a request for establishing the session to the corresponding packet data network gateway, and the protocol configuration option field of the request for establishing the session is provided with variable-length prefix length information for applying for the IPv6 short prefix.
Step 506: the packet data network gateway obtains the requested IPv6 short prefix on behalf of the UE according to the variable length prefix length information carried in the received session establishment request, and the obtaining method may be various, for example: obtained from the user authentication and authorization server, or actively distributed by the packet data network gateway.
In this embodiment, the packet data network gateway, as a client of the DHCPv6, initiates a stateful DHCPv6 prefix authorization procedure on behalf of the UE, and sends a DHCPv6 solicitation message containing variable-length prefix length information to a DHCP server (as an authorization router) to request IPv6 short prefixes of corresponding lengths.
It should be noted that the packet data network gateway may carry a RAPID acknowledgement option (RAPID _ COMMIT option) in the DHCPv6 solicitation message to simplify the flow of the DHCPv6, and then directly proceed to step 509.
Step 507: the DHCP server sends a DHCPv6 advertisement to the packet data network gateway via a broadcast message to advertise that the requested service can be provided.
Step 508: and the packet data network gateway sends a DHCPv6 request message to the DHCP server after receiving the DHCPv6 notice.
Step 509: the DHCP server sends a DHCPv6 response message to the packet data network gateway, where the DHCPv6 response message includes information such as an IPv6 short prefix assigned to the UE.
Step 510: and the packet data network gateway sends a session establishment response message to the serving gateway, wherein the protocol configuration option field of the session establishment response message carries the IPv6 short prefix distributed to the UE.
Step 511: and the service gateway sends a session establishment response message to the mobile management unit, wherein the protocol configuration option field of the session establishment response message carries the IPv6 short prefix distributed to the UE.
Step 512: and the mobile management unit sends an attachment acceptance message to the UE, wherein an IPv6 short prefix allocated to the UE is carried in a packet data network gateway address field of the attachment acceptance message.
Step 513: and the UE completes attachment and establishes packet data network connection, and can also use the acquired IPv6 short prefix to perform IPv6 address allocation for the subnet.
Referring to fig. 6, fig. 6 is a flowchart of a variable-length prefix application according to another embodiment of the present invention. As shown in fig. 6, during the initial attachment of the gateway-capable UE to the network, a 64-bit fixed-length prefix is first obtained through the routing advertisement message according to the existing 3GPP procedure. If the UE needs to operate the gateway function, sending a bearer resource modification request message to the network side, and adding a variable-length prefix mark and a variable-length prefix length for applying for the IPv6 short prefix in a protocol configuration option field of the bearer resource modification request message. After receiving the request for modifying the bearing resource, the packet data network gateway applies for the IPv6 short prefix for the UE according to the variable-length prefix mark and the variable-length prefix length contained in the request, and transmits the distributed IPv6 short prefix to the UE in the protocol configuration option field of the session management request message. The flow shown in fig. 6 specifically includes the following steps:
step 601 to step 610: after the UE initializes and attaches to the EPC network, it gets an IPv6 prefix of 64-bit length through a route advertisement message. Because of the prior art, it is not described in detail.
Step 611: when the gateway function is started by the UE with the gateway function, the IPv6 short prefix is required to be obtained, the UE sends a bearer resource modification request message to the mobile management unit, and the variable-length prefix length information for applying for the IPv6 short prefix is added to a protocol configuration option field of the bearer resource modification request message.
Step 612: the mobile management unit sends a bearer resource modification instruction to the serving gateway, and adds variable length prefix length information for applying for the IPv6 short prefix in a protocol configuration option field of the bearer resource modification instruction.
Step 613: the service gateway sends a bearing resource modification instruction to the packet data network gateway, and adds variable length prefix length information for applying for the IPv6 short prefix in a protocol configuration option field of the bearing resource modification instruction.
Step 614: the packet data network gateway obtains the IPv6 short prefix on behalf of the UE according to the variable length prefix length information in the received bearer resource modification instruction, and the obtaining method may be various, for example: obtained from the user authentication and authorization server, or actively distributed by the packet data network gateway.
In the embodiment, the packet data network gateway acquires the IPv6 short prefix through interaction with the user authentication authorization server.
Step 615: and the packet data network gateway sends a bearer update request to the serving gateway, wherein an IPv6 short prefix allocated to the UE is carried in a protocol configuration option field of the bearer update request.
Step 616: the service gateway sends a bearer update request to the corresponding mobile management unit, and an IPv6 short prefix allocated to the UE is carried in a protocol configuration option field of the bearer update request.
Step 617: the mobile management unit sends a session management request to the UE, and an IPv6 short prefix allocated to the UE is carried in a protocol configuration option field of the session management request.
Step 618: and the UE performs IPv6 address allocation for the subnet by using the acquired IPv6 short prefix.
As can be seen from the above-mentioned flow, the variable-length prefix application idea of the present invention can be represented as shown in fig. 7. Referring to fig. 7, fig. 7 is a simplified diagram of a variable-length prefix application process according to the present invention, and the process includes the following steps:
step 710: and the UE initiates a variable length prefix request containing a variable length prefix mark and a variable length prefix length to the P-GW.
Step 720: and the P-GW acquires the variable-length prefix requested by the UE according to the content in the received variable-length prefix request and issues the variable-length prefix to the UE.
In order to smoothly realize the above variable-length prefix application flow, the arrangement shown in fig. 8 may be performed. Referring to fig. 8, fig. 8 is a diagram of a system for variable length prefix application according to an embodiment of the present invention, where the system includes a UE and a P-GW that can be connected (directly connected or indirectly connected). The UE comprises a request format maintenance unit and a variable-length prefix request unit which are connected; the P-GW comprises a request analysis unit, a variable-length prefix acquisition unit and a variable-length prefix issuing unit which are connected, and the variable-length prefix acquisition unit and the variable-length prefix issuing unit can be combined into a variable-length prefix distribution unit.
In specific application, a request format maintenance unit in the UE is provided with a variable-length prefix flag and a variable-length prefix length format, and the format can be subjected to maintenance operations including storage and provision. The variable-length prefix request unit can acquire the variable-length prefix mark and the variable-length prefix length from the request format maintenance unit, and carries the acquired content in the variable-length prefix request to send to network side equipment such as the P-GW and the like so as to apply for the variable-length prefix.
The request analysis unit in the P-GW can receive the variable-length prefix request from the UE, analyze the variable-length prefix mark and the variable-length prefix length from the request analysis unit, and then send the analyzed content to the variable-length prefix acquisition unit. The variable-length prefix obtaining unit can obtain the IPv6 short prefix according to the received variable-length prefix mark and the variable-length prefix length, send the obtained IPv6 short prefix to the variable-length prefix issuing unit, and issue the received IPv6 short prefix to the user equipment by the variable-length prefix issuing unit.
It should be noted that, in addition to the IPv6 short prefix application, the present invention technology can also be applied to other variable-length prefix applications, as long as the operation similar to that realized by the aforementioned flow and apparatus can be successfully realized. Furthermore, the functional entity that actually allocates the IPv6 short prefix to the UE may be a functional entity that can perform information management and allocation, such as an operation and maintenance center on the network side, instead of the P-GW.
In summary, it can be seen that, regardless of the method or the apparatus, the variable-length prefix application technique of the present invention does not need to introduce a mechanism of stateful dhcpv6 for allocating IPv6 addresses, and the UE does not need to support a client of dhcpv6, which is beneficial to smooth and seamless evolution of the network.
Furthermore, since the application process is not based on the fixed-length prefix, the space of the IPv6 address prefix is not wasted unnecessarily due to the existence of the variable-length prefix. In addition, the method for applying for the IPv6 short prefix based on the variable length prefix length information is completely different from a mechanism for distributing IPv6 addresses based on stateful dhcpv6 in the prior art, and can effectively solve the problems of complexity, rigid and inflexible application of the IPv6 short prefix in the prior art.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (18)
1. A method for applying for a variable-length prefix, the method comprising:
user Equipment (UE) initiates a variable-length prefix request containing variable-length prefix length information to a network side; the network side allocates a variable-length prefix to the UE according to the variable-length prefix length information in the received variable-length prefix request;
wherein, the variable length prefix request is an attachment request or a bearing resource modification request;
when the variable-length prefix request is an attach request, the process of initiating the variable-length prefix request by the UE comprises the following steps: the UE with the gateway function sends an attachment request to a mobile management unit; the mobile management unit sends a session establishing request to a packet data network gateway through a service gateway, and the protocol configuration option field of the session establishing request is provided with variable-length prefix length information for applying for variable-length prefixes;
when the variable-length prefix request is a bearer resource modification request, the process of initiating the variable-length prefix request by the UE includes: the UE with gateway function sends a request message for modifying the bearer resource to a mobile management unit, wherein the protocol configuration option field of the request message for modifying the bearer resource carries information for applying for the length-variable prefix length; the mobile management unit sends a bearing resource modification instruction to the packet data network gateway through the service gateway, wherein the bearing resource modification instruction carries variable-length prefix length information for applying for variable-length prefixes.
2. The method of claim 1, wherein the functional entity actually performing variable-length prefix allocation on the network side is a packet data network gateway P-GW, and the variable-length prefix length information includes a variable-length prefix flag and a variable-length prefix length.
3. The method of claim 2, wherein the variable length prefix tag and variable length prefix length are carried in a protocol configuration option included in the variable length prefix request.
4. The method of claim 1, wherein when the variable-length prefix request is an attach request,
the process of allocating the variable length prefix includes:
the packet data network gateway obtains the requested variable-length prefix on behalf of the UE according to the variable-length prefix length information carried in the received session establishing request, and then sends a session establishing response message to the mobile management unit through the serving gateway, wherein the session establishing response message carries the variable-length prefix distributed to the UE; the mobile management unit sends an attachment acceptance message to the UE, wherein the attachment acceptance message carries a variable-length prefix distributed to the UE.
5. The method of claim 4, wherein the step of the packet data network gateway acquiring the variable length prefix on behalf of the UE comprises:
the packet data network gateway as the client of the DHCPv6 initiates a stateful DHCPv6 prefix authorization process on behalf of the UE, and sends a DHCPv6 solicitation message containing variable-length prefix length information to the DHCP server to request a variable-length prefix of a corresponding length.
6. The method of claim 1, wherein when the variable-length prefix request is a bearer resource modification request,
the process of allocating the variable length prefix includes:
the packet data network gateway obtains the variable-length prefix on behalf of the UE according to the variable-length prefix length information in the received bearer resource modification instruction, and sends a bearer update request to the mobile management unit through the serving gateway, wherein the bearer update request carries the variable-length prefix allocated to the UE; the mobile management unit sends a session management request to the UE, wherein the session management request carries a variable-length prefix distributed to the UE.
7. The method of claim 6, wherein the step of the packet data network gateway acquiring the variable length prefix on behalf of the UE comprises:
the packet data network gateway obtains the variable-length prefix by interacting with the user authentication authorization server.
8. The method according to any one of claims 1 to 7, wherein the variable-length prefix is an IPv6 short prefix.
9. A variable-length prefix application device is positioned at a user side and is characterized by comprising a request format maintenance unit and a variable-length prefix request unit; wherein,
the request format maintenance unit is provided with variable-length prefix length information and is used for performing maintenance operations including storage and supply on the information;
the variable-length prefix request unit is used for acquiring variable-length prefix length information from the request format maintenance unit and carrying the acquired content in a variable-length prefix request to initiate a variable-length prefix application;
the variable length prefix request is an attachment request or a bearing resource modification request;
when the variable-length prefix request is an attach request, the process of initiating the variable-length prefix request by the UE comprises the following steps: the UE with the gateway function sends an attachment request to a mobile management unit; the mobile management unit sends a session establishing request to a packet data network gateway through a service gateway, and the protocol configuration option field of the session establishing request is provided with variable-length prefix length information for applying for variable-length prefixes;
when the variable-length prefix request is a bearer resource modification request, the process of initiating the variable-length prefix request by the UE includes: the UE with gateway function sends a request message for modifying the bearer resource to a mobile management unit, wherein the protocol configuration option field of the request message for modifying the bearer resource carries information for applying for the length-variable prefix length; the mobile management unit sends a bearing resource modification instruction to the packet data network gateway through the service gateway, wherein the bearing resource modification instruction carries variable-length prefix length information for applying for variable-length prefixes.
10. The apparatus of claim 9,
the device is arranged in the UE; the variable-length prefix length information comprises a variable-length prefix mark and a variable-length prefix length; the variable-length prefix flag and the variable-length prefix length are carried in a protocol configuration option included in the variable-length prefix request.
11. The apparatus of claim 9 or 10, wherein the variable-length prefix is an IPv6 short prefix.
12. A device for applying for variable length prefix is located at network side, and is characterized in that the device comprises a request analysis unit and a variable length prefix distribution unit; wherein,
the request analysis unit is used for receiving a variable-length prefix request from a user side, analyzing variable-length prefix length information from the request analysis unit, and sending the analyzed content to the variable-length prefix distribution unit;
the variable-length prefix allocation unit is used for acquiring a variable-length prefix according to the received variable-length prefix length information and transmitting the acquired variable-length prefix to the user equipment;
the variable length prefix request is an attachment request or a bearing resource modification request;
when the variable-length prefix request is an attach request, the process of allocating a variable-length prefix includes: the packet data network gateway obtains the requested variable-length prefix on behalf of the UE according to the variable-length prefix length information carried in the received session establishing request, and then sends a session establishing response message to the mobile management unit through the serving gateway, wherein the session establishing response message carries the variable-length prefix distributed to the UE; the mobile management unit sends an attachment acceptance message to the UE, wherein the attachment acceptance message carries a variable-length prefix distributed to the UE;
when the variable-length prefix request is a bearer resource modification request, the process of allocating a variable-length prefix includes: the packet data network gateway obtains the variable-length prefix on behalf of the UE according to the variable-length prefix length information in the received bearer resource modification instruction, and sends a bearer update request to the mobile management unit through the serving gateway, wherein the bearer update request carries the variable-length prefix allocated to the UE; the mobile management unit sends a session management request to the UE, wherein the session management request carries a variable-length prefix distributed to the UE.
13. The apparatus according to claim 12, wherein the variable-length prefix allocation unit includes a variable-length prefix acquisition unit and a variable-length prefix issuing unit; wherein,
the variable-length prefix obtaining unit is used for obtaining a variable-length prefix according to the received variable-length prefix length information and sending the obtained variable-length prefix to the variable-length prefix issuing unit;
the variable-length prefix issuing unit is used for issuing the received variable-length prefix to the user equipment.
14. The apparatus of claim 13,
the device is arranged in a packet data network gateway P-GW; the variable-length prefix length information comprises a variable-length prefix mark and a variable-length prefix length; the variable-length prefix flag and the variable-length prefix length are carried in a protocol configuration option included in the variable-length prefix request.
15. The apparatus according to any one of claims 12 to 14, wherein the variable-length prefix is an IPv6 short prefix.
16. The application system of the variable length prefix is characterized by comprising a request format maintenance unit and a variable length prefix request unit which are positioned at a user side, and further comprising a request analysis unit and a variable length prefix distribution unit which are positioned at a network side; wherein,
the request format maintenance unit is provided with variable-length prefix length information and is used for performing maintenance operations including storage and supply on the information;
the variable-length prefix request unit is used for acquiring variable-length prefix length information from the request format maintenance unit and carrying the acquired content in a variable-length prefix request to initiate a variable-length prefix application;
the request analysis unit is used for receiving a variable-length prefix request from a user side, analyzing variable-length prefix length information from the request analysis unit, and sending the analyzed content to the variable-length prefix distribution unit;
the variable-length prefix allocation unit is used for acquiring a variable-length prefix according to the received variable-length prefix length information and transmitting the acquired variable-length prefix to the user equipment;
the variable length prefix request is an attachment request or a bearing resource modification request;
when the variable-length prefix request is an attach request, the process of initiating the variable-length prefix request by the UE comprises the following steps: the UE with the gateway function sends an attachment request to a mobile management unit; the mobile management unit sends a session establishing request to a packet data network gateway through a service gateway, and the protocol configuration option field of the session establishing request is provided with variable-length prefix length information for applying for variable-length prefixes;
when the variable-length prefix request is a bearer resource modification request, the process of initiating the variable-length prefix request by the UE includes: the UE with gateway function sends a request message for modifying the bearer resource to a mobile management unit, wherein the protocol configuration option field of the request message for modifying the bearer resource carries information for applying for the length-variable prefix length; the mobile management unit sends a bearing resource modification instruction to the packet data network gateway through the service gateway, wherein the bearing resource modification instruction carries variable-length prefix length information for applying for variable-length prefixes.
17. The system according to claim 16, wherein the variable-length prefix length information includes a variable-length prefix flag and a variable-length prefix length; the variable length prefix request is an attachment request or a bearing resource modification request; the variable-length prefix flag and the variable-length prefix length are carried in a protocol configuration option included in the variable-length prefix request.
18. The system according to claim 16 or 17, wherein the variable-length prefix is an IPv6 short prefix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010159392.8A CN102238241B (en) | 2010-04-26 | 2010-04-26 | A kind of application method of elongated prefix, device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010159392.8A CN102238241B (en) | 2010-04-26 | 2010-04-26 | A kind of application method of elongated prefix, device and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102238241A CN102238241A (en) | 2011-11-09 |
| CN102238241B true CN102238241B (en) | 2015-09-16 |
Family
ID=44888436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010159392.8A Expired - Fee Related CN102238241B (en) | 2010-04-26 | 2010-04-26 | A kind of application method of elongated prefix, device and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102238241B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103327481B (en) * | 2012-03-21 | 2018-08-17 | 中兴通讯股份有限公司 | Establish the method, apparatus and system of data connection |
| CN103916493B (en) * | 2014-04-15 | 2017-12-08 | 大唐移动通信设备有限公司 | A kind of IP address section distribution method and device |
| CN113783974B (en) * | 2021-09-09 | 2023-06-13 | 烽火通信科技股份有限公司 | Method and device for dynamically issuing MAP domain rule |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1794737A (en) * | 2004-12-20 | 2006-06-28 | 阿尔卡特公司 | Device for dynamically allocating variable length prefixes to network equipments of an ip-network. |
| CN101227494A (en) * | 2008-01-09 | 2008-07-23 | 中兴通讯股份有限公司 | Method for establishing Internet safety protocol safe alliance when accessing multi grouping data network |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4585002B2 (en) * | 2004-08-20 | 2010-11-24 | テレフオンアクチーボラゲット エル エム エリクソン（パブル） | High-speed network connection mechanism |
-
2010
- 2010-04-26 CN CN201010159392.8A patent/CN102238241B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1794737A (en) * | 2004-12-20 | 2006-06-28 | 阿尔卡特公司 | Device for dynamically allocating variable length prefixes to network equipments of an ip-network. |
| CN101227494A (en) * | 2008-01-09 | 2008-07-23 | 中兴通讯股份有限公司 | Method for establishing Internet safety protocol safe alliance when accessing multi grouping data network |
Non-Patent Citations (2)
| Title |
|---|
| 《IPv6 Prefix Options for Dynamic Host Configuration Protocol (DHCP) version 6》;O.Troan等;《IETF RFC3633》;20031231;第1-19页 * |
| Kim等.《Hierarchical Prefix Delegation Protocol for Internet Protocol Version 6 (IPv6)》.《IETFdraft-bykim-ipv6-hpd-01.txt》.2004, * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102238241A (en) | 2011-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10516647B2 (en) | Method for establishing data connection on mobile network, mobile network, and policy control entity | |
| US8179888B2 (en) | Telecommunications apparatus and method | |
| US8824430B2 (en) | Wireless mobility gateway | |
| US9924454B2 (en) | Method, apparatus and system for establishing connection | |
| EP2782372B1 (en) | Method, network element and ue achieving identifier and location separation and interface identifier allocation | |
| US9693263B2 (en) | Method and system for data flow management of user equipment in a tunneling packet data network | |
| CN101106579A (en) | A communication system and method for allocating address for user device | |
| CN101534496B (en) | Method for obtaining home link information by user | |
| KR100909014B1 (en) | Dynamic IP Address Allocation Method for Mobile Terminal in Mobile Communication System | |
| CN103796281A (en) | Management method, device and system for packet-data network type | |
| CN101997898B (en) | Method and system for M2M (Machine to Machine) application server to send data packet | |
| CN102651862B (en) | IP (Internet Protocol) address configuration method of WAP (Wireless Application Protocol) gateway and equipment thereof | |
| CN102625305B (en) | Access the method and system of evolved packet system | |
| CN102238241B (en) | A kind of application method of elongated prefix, device and system | |
| CN102036413B (en) | Multi-access access information management method, device and gateway | |
| CN101790146B (en) | Method for allocating address information, network equipment and network system | |
| JP4726860B2 (en) | Gateway device, access gateway device, core network system, program, and packet transfer method | |
| CN103188657B (en) | A kind of method and system for distributing IP address for UE | |
| CN101635915B (en) | Method and device for selecting packet data network (PDN) | |
| CN103973829B (en) | Obtain the method and its mobile communications device of server address | |
| CN103024865B (en) | A kind of core network access and network side initiate the method and system of attachment removal | |
| CN102238756A (en) | Network connection establishing method, device and system | |
| CN103905570B (en) | IP address delete processing, delet method and the device of multiple stack carrying | |
| Sarikaya et al. | RFC 6653: DHCPv6 Prefix Delegation in Long-Term Evolution (LTE) Networks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 Termination date: 20190426 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |