WO2011072540A1 - Procédé et passerelle d'attribution d'adresse ip - Google Patents

Procédé et passerelle d'attribution d'adresse ip Download PDF

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Publication number
WO2011072540A1
WO2011072540A1 PCT/CN2010/076989 CN2010076989W WO2011072540A1 WO 2011072540 A1 WO2011072540 A1 WO 2011072540A1 CN 2010076989 W CN2010076989 W CN 2010076989W WO 2011072540 A1 WO2011072540 A1 WO 2011072540A1
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WO
WIPO (PCT)
Prior art keywords
address
mapping
mobile terminal
unique identification
segments
Prior art date
Application number
PCT/CN2010/076989
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English (en)
Chinese (zh)
Inventor
胡玉胜
林青春
张晋兴
Original Assignee
华为技术有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2011072540A1 publication Critical patent/WO2011072540A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5007—Internet protocol [IP] addresses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00—Indexing scheme associated with group H04L61/00
    • H04L2101/60—Types of network addresses
    • H04L2101/604—Address structures or formats
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]

Definitions

  • the invention relates to the field of data service of a wireless core network, an IP address allocation method and a gateway. Background technique
  • the IP pool allocation method is relatively simple, that is, the gateway GPRS support node (GGSN) allocates an IP address to the mobile terminal in the shared local IP address pool, and the IP address used by the mobile terminal after the mobile terminal goes offline. The address can be assigned to other mobile terminals that are subsequently online.
  • GGSN gateway GPRS support node
  • the local IP address pool allocation method is characterized in that the IP address assigned by the mobile terminal every time it goes online may not be the same, and may occur under abnormal conditions:
  • the external server records the IP address used by the mobile terminal A, when After the mobile terminal A goes offline, the IP address originally assigned to the mobile terminal A is again assigned to other mobile terminals, such as the mobile terminal B, thereby causing the external server to erroneously transmit the message that should originally be sent to the mobile terminal A to Mobile terminal B.
  • the authentication authorization/authorization/accounting (AAA, Authentication Authorization Accounting) server assigns an IP address and a dynamic host configuration protocol (DHCP) to assign an IP address.
  • AAA Authentication Authorization Accounting
  • DHCP dynamic host configuration protocol
  • This method of assigning a foreign IP address is a mobile terminal passing an GGSN to an external server (for example, an AAA server or a DHCP server). Sending a request for assigning an IP address to the mobile terminal, after receiving the request, the external server allocates an idle IP address to the mobile terminal from the configured IP address pool and returns it to the mobile terminal through the GGSN.
  • the embodiments of the present invention provide an IP address allocation method and a corresponding gateway, which are intended to solve the problem of poor fault tolerance or relatively stable operation of an external server when assigning an IP address to a mobile terminal.
  • An IP address allocation method includes: acquiring a unique identification code of a mobile terminal; mapping the mapping variable to a mapping variable by using a unique identification field or the unique identification code in the unique identification code as a mapping variable
  • the last three segments of the IP address; the subnet number to which the unique identification code belongs is read from the configuration information, and the prefix with the subnet number being the IP address is combined with the last three segments of the IP address to form an IP address; Assigning the IP address obtained by the combination to the mobile terminal.
  • a gateway comprising: an obtaining module, configured to obtain a unique identifier of the mobile terminal; and a mapping module, configured to use the unique identifier field in the unique identifier code of the mobile terminal or the unique identifier as a mapping variable, and the mapping variable Mapping to the last three segments of the IP address; the IP address combination module, configured to read, from the configuration information, the subnet number to which the unique identifier is assigned, where the subnet number is a prefix of the IP address and the IP address The last three segments are combined into an IP address; an allocation module is configured to allocate an IP address obtained by combining the IP address combination modules to the mobile terminal.
  • the unique identifier field in the unique identifier code of the mobile terminal is used as a mapping variable, and the mapping variable is mapped to the last three segments of the IP address, and the subnet number to which the unique identifier of the mobile terminal belongs is used as the prefix of the IP address.
  • the IP address is combined with the last three segments of the mapped IP address. Since the IP address generated by the mapping method in the embodiment of the present invention is generated by the local GGSN, and does not depend on the stable operation of an external server (for example, an AAA server or a DHCP server), the IP address allocation is performed. The method has better robustness, and does not need to release the IP address pool as in the prior art, and the IP address is allocated quickly. In addition, for each mobile terminal, the IP generated by the mapping method of the present invention is used. The addresses are unique, thus eliminating address conflicts that may exist when assigning or releasing IP addresses.
  • FIG. 1 is a schematic flowchart of a basic method for generating an IP address according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a modified discontinuous IP address number segment provided by an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a basic logical structure of a gateway according to an embodiment of the present invention. detailed description
  • a schematic flowchart of a method for generating an IP address according to an embodiment of the present invention includes the following steps:
  • the mobile terminal will provide a service GPRS support node (SGSN, Serving) before accessing the Internet.
  • the GPRS Support Node sends an activation message, for example, a Packet Data Protocol (PDP) context request, which is forwarded by the SGSN to the GGSN, and the GGSN acquires the unique identification code of the mobile terminal from the activation message.
  • PDP Packet Data Protocol
  • the unique identification code of the mobile terminal may be an International Mobile Subscriber Identity (IMSI), an International Mobile Equipment Identity (IMEI), or other code that can uniquely identify the mobile terminal. Word, etc.
  • IMSI International Mobile Subscriber Identity
  • IMEI International Mobile Equipment Identity
  • mapping variable is mapped to the last three segments of the IP address by using a unique identifier field or a unique identifier in the unique identifier of the mobile terminal as a mapping variable.
  • the system administrator can set a range of number segments.
  • the GGSN receives the activation message of the mobile terminal, it first determines whether the IMSI of the mobile terminal is within the set number range.
  • the unique identifier field in the unique identifier of the mobile terminal for example, the mobile station authentication number (MSIN, Mobile Station Identity Number) field in the IMSI is used as a mapping variable.
  • the mapping variable is mapped to the last three segments of the IP address, including:
  • the existing IP address is 32 bits, and each 8 bits is a section (or a segment).
  • the last three segments of the IP address are: the 16th to 23rd bits are the first segment, and the 8th and 15th bits are the second segment, the 0th to the 7th bits.
  • a mapping parameter can be selected for each of these segments, and one mapping parameter can remain unchanged for different MSINs.
  • one of the MSIN and one of the three mapping parameters is used as a mapping factor, and three operation operations are performed on the mapping factor to obtain three operation results, and the three operation results are used as the last three segments of the IP address.
  • IPv4 considering that the first segment of the IP address (bits 16 to 23) is converted to a corresponding decimal range between 0 and 255, 255x254 and 255 can be used as the first mapping parameter to execute (MSIN/ 255X254)
  • the operation result obtained after the operation operation of %255 is taken as the first segment of the last three segments of the IP address, where "x", "/" and "%" are respectively the multiplication operation, the division operation, and the modulo operation.
  • the legal range for conversion to decimal should be between 1 and 254. If the "modulo" operation is simply performed, that is, the operation of MSIN/%254 is performed. You may get an operation result of 0 or 255, which is not within the legal range. Therefore, for the third segment of the IP address, in the embodiment of the present invention, 254 can be used as the third mapping parameter, and the operation result obtained after the (MSIN%255) + 1 operation operation is used as the first segment of the IP address.
  • the MSIN is a unique identification field in the international mobile subscriber identity of the mobile terminal, for each mobile terminal, the last three segments of the mapped IP address are also unique, and will not be the last three of the IP addresses of other mobile terminals. Segment conflicts.
  • the present invention uses the MSIN field in the international mobile subscriber identity as a mapping variable, and performs operations operations such as adding, subtracting, multiplying, dividing, and modulating on the MSIN and the mapping parameters, the techniques in the art. Personnel should be able to understand that there are other mapping variables to choose from, and there are other operations that can be used as operations to implement the mapping, as long as the unique identification code of the mobile terminal or the field in the unique identification code is mapped. The last three segments of the IP address are unique, and the present invention is not limited.
  • a linear mapping (as shown in the above embodiment) may be used as a preferred mapping manner, such that for a serial number of consecutive IMSIs, after linear mapping The last three segments of the obtained IP address are consecutive.
  • the subnet number to which the unique identifier is assigned is read from the configuration information, and the prefix with the subnet number being the IP address is combined with the last three segments of the IP address to form an IP address.
  • the unique identification code number For multiple mobile terminals accessing the Internet, the unique identification code number, such as the IMSI number segment, needs to be planned into a certain subnet. That is, the network management personnel plan the IMSI number segment in advance, and clarify the child to which the unique identification code of the mobile terminal belongs.
  • the network number is stored in the GGSN in the form of configuration information.
  • the prefix of the IP address ie, the 24th to 31st bits of the IP address in the IPv4 address
  • the subnet number is a prefix of the IP address, and is combined with the last three segments of the IP address obtained by mapping in S102 to constitute an IP address.
  • the unique identification code number segments formed by the unique identification codes may not be consecutive to each other, so even after linear mapping, prefix is obtained.
  • the IP address number segments formed by the IP addresses are not continuous with each other. As shown in FIG.
  • the IMSI number segment 1 is mapped into an IP address number segment 1, for example, 192.148.125.2 to 192.148.125.96
  • the IMSI number segment 2 is mapped into an IP address number segment 2, for example, 192.148.125.100 to 192.148.125.213
  • discontinuous uniqueness is formed for multiple mobile terminal unique identification codes. After the identification code number segment is linearly mapped to obtain a discontinuous IP address number segment, the discontinuous IP address number segment may be corrected.
  • the specific modification method is: an IP address based on the endpoint of the IP address number segment, The reference IP address is increased by an offset (Offset). As for the size of the offset, it may not be fixed, mainly based on the difference between the endpoints of the discontinuous IP address number segment.
  • the basic principle is: After increasing the offset, the modified IP address number segment constitutes a continuous IP address number segment.
  • IMSI (1) and IMSI (95) constitute the IMSI number segment IMSI (3-no)
  • IMSI (m) and IMSI (234) constitute the IMSI number segment IMSI (121-234)
  • the mapped IP address number segment They are the first IP address number segment (IP address number segment 1) 192.148.125.2 ⁇ 192.148.125.96 and the second IP address number segment (IP address number segment 2) 192.148.125.100 ⁇ 192.148.125.213.
  • One endpoint (terminating IP address) of the first IP address number segment is 192.148.125.96
  • one endpoint (starting IP address) of the second IP address number segment is 192.148.125.100.
  • the two IP address numbers are not consecutive. If the IP address is directly allocated according to the mapped IP address number, the network planning is inconvenient and the address resources are wasted.
  • the endpoint 192.148.125.100 of the second IP address number segment can be increased by an offset (as shown in FIG. 3), for example, an offset of 192.148.125.100 is added.
  • a quantity - 3 that is, an operation of 192.148.125.100 + ( - 3 ) for 192.148.125.100, making it 192.148.125.97.
  • the second IP address number segment becomes 192.148.125.97 ⁇ 192.148.125.213, and its starting IP address becomes 192.148.125.97, immediately following the termination IP address of the first IP address number segment 192.148.125.96, two The IP address number segment becomes continuous.
  • the IP address obtained by adding the prefix constitutes The discontinuous IP address number segment is also not contiguous.
  • the method of increasing the offset can be used to modify the non-contiguous IP address number segment to a continuous IP address number segment. The specific method is not described here.
  • FIG. 4 a schematic diagram of a basic logical structure of a gateway according to an embodiment of the present invention is provided.
  • the illustrated functional modules/units may be software modules/units, hardware modules/units, or modules/units in which hardware and software are combined.
  • the gateway may be a GGSN or a router in the GPRS system, which specifically includes the following functional modules/units.
  • the mapping module 401 is configured to map the mapping variable to the last three segments of the IP address by using a unique identifier field in the unique identifier of the mobile terminal as a mapping variable, including:
  • Parameter selection unit 4011 configured to select three mapping parameters
  • the operation unit 4012 is configured to use one of the three mapping parameters selected by the MSIN and the parameter selection unit 4011 as a mapping factor, and perform three operation operations on the mapping factor to obtain three operation results, three operations.
  • the result is the last three segments of the IP address.
  • the IP address combination module 402 is configured to use the subnet number to which the mobile terminal unique identification code belongs as the IP address prefix, and combine with the last three segments of the IP address mapped by the mapping module 401 to form an IP address.
  • the unique identification code number segments formed by the unique identification codes may not be consecutive to each other.
  • the IP address number segment formed by the IP address obtained by adding the prefix (the subnet number to which the mobile terminal unique identification code belongs) is not continuous with each other; or, multiple The unique identification code number segments of the mobile terminal are continuous with each other, but because the mapping mode of the mapping module 401 is not a linear mapping, the IP address number segments formed by the IP addresses obtained by the prefix are not continuous with each other. .
  • An allocating module 403, configured to allocate an IP address obtained by combining the IP address combining module 402 to the mobile terminal End.
  • the gateway may further include: an IP address number segment.
  • the correcting module 404 when the unique identification code number segment formed by the unique identification code of the mobile terminal is mapped to obtain a discontinuous IP address number segment, the discontinuous IP address number segment is corrected to become a continuous IP address. The segment is then assigned to the mobile terminal by the allocation module 403.
  • the method of correcting the discontinuous IP address number segment may be an IP address based on the endpoint of the IP address number segment, and the reference IP address is increased by an offset (Offset).
  • the size of the offset it may not be fixed, mainly based on the difference between the endpoints of the discontinuous IP address number.
  • the basic principle is: After increasing the offset, the modified IP address number segment constitutes a continuous IP.
  • the program may be stored in a computer readable storage medium, and the storage medium may include: Read Only Memory (ROM), Random Access Memory (RAM), disk or optical disk.
  • ROM Read Only Memory
  • RAM Random Access Memory
  • IP address allocation method and the corresponding gateway provided by the embodiment of the present invention is only for helping to understand the method and core idea of the present invention. Meanwhile, for those skilled in the art, according to the present invention, The present invention is not limited by the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

Dans ses modes de réalisation, la présente invention se rapporte à un procédé d'attribution d'adresse IP et à la passerelle correspondante. La présente invention a pour objectif de résoudre le problème lié à la mauvaise tolérance aux pannes ou à la dépendance en fonctionnement fixe de serveurs supplémentaires lorsque des adresses IP sont attribuées à des terminaux mobiles. Le procédé selon l'invention consiste : à acquérir le code d'identification unique du terminal mobile (S101); à mapper la variable de mappage par rapport aux trois sections arrière de l'adresse IP, lorsque le champ d'identification unique dans le code d'identification unique ou le code d'identification unique lui-même sont considérés comme la variable de mappage (S102); à lire le numéro de sous-réseau domestique du code d'identification unique contenu dans les informations de configuration, lorsque le numéro du sous-réseau est considéré comme le préfixe de l'adresse IP, et à le combiner aux trois sections arrière de l'adresse IP en même temps que l'adresse IP (S103); et à attribuer l'adresse IP combinée au terminal mobile (S104). Le procédé d'attribution d'adresse IP selon la présente invention permet d'attribuer une adresse IP plus rapidement et de manière plus sûre et plus fiable sans devoir libérer le groupe d'adresses IP, une opération qui prend beaucoup de temps. En outre, les adresses IP générées par le mode mappage de la présente invention sont toutes uniques, ce qui supprime le risque de conflits éventuels lors de l'attribution ou de la libération de l'adresse IP.
PCT/CN2010/076989 2009-12-17 2010-09-16 Procédé et passerelle d'attribution d'adresse ip WO2011072540A1 (fr)

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CN2009102524903A CN101764856B (zh) 2009-12-17 2009-12-17 一种ip地址分配方法和网关

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CN101764856B (zh) * 2009-12-17 2012-11-07 华为技术有限公司 一种ip地址分配方法和网关
CN102231764A (zh) * 2011-06-22 2011-11-02 华为技术有限公司 网络地址分配的方法和装置
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CN103248716B (zh) * 2012-02-09 2017-04-12 华为技术有限公司 一种私网地址分配方法、装置及系统
CN103379179B (zh) * 2012-04-17 2016-12-14 南京中兴软件有限责任公司 一种规划网络ip地址的方法及系统
CN102739821A (zh) * 2012-07-03 2012-10-17 大唐移动通信设备有限公司 Ip地址的分配方法及系统
CN102811263A (zh) * 2012-07-25 2012-12-05 中国联合网络通信集团有限公司 移动终端基于IPv6的通信方法和系统以及移动终端
CN103037026B (zh) * 2012-12-10 2015-07-22 上海斐讯数据通信技术有限公司 Dhcp服务器地址池自动配置方法、装置及cpe设备
CN106570097B (zh) * 2016-10-31 2020-09-08 华为技术有限公司 序列生成方法及装置
CN106953938A (zh) * 2017-03-29 2017-07-14 武汉米风通信技术有限公司 一种广电频谱超窄带物联网终端信息重发识别方法及装置
CN108156275B (zh) * 2017-12-20 2021-03-09 北京金山云网络技术有限公司 Ip地址分配方法、装置、电子设备及存储介质
TWI692732B (zh) * 2018-03-07 2020-05-01 虹映科技股份有限公司 即時資訊顯示方法及系統
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