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Method for partitioned recombining IP message

A technology for IP message and legitimacy, applied in digital transmission systems, electrical components, transmission systems, etc., can solve the problems of large storage space and complex processing of table entry pointers, simplifying computational complexity, reducing storage space, and improving The effect of processing efficiency

Inactive Publication Date: 2008-09-17
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to provide a method for fragment reorganization of IP packets, so as to solve the problem that the processing of existing IP packet fragment reassembly is too complicated and the storage space occupied by the entry pointer is too large

Method used

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  • Method for partitioned recombining IP message
  • Method for partitioned recombining IP message
  • Method for partitioned recombining IP message

Examples

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Embodiment Construction

[0036] The basic principle of the present invention is to allocate a group of pointers after merging adjacent fragments stored in the cache area into a new fragment when IP messages are reassembled, reducing the number of pointers and simplifying the operation of overlap check during reorganization.

[0037] The specific instructions are as follows:

[0038] Due to the addition of partial encapsulation in the aggregation devices based on IP tunneling technology, the length of the packet may exceed the length limit of the Ethernet. However, because the added encapsulation length is not very long, the maximum length of the encapsulated Ethernet frame They are all within the range of 1500-1800Byte, and the maximum is no more than 2000Byte. According to the MTU of Ethernet, it is enough to be divided into two pieces. However, considering that there may be old-fashioned routers with an MTU of 512 bytes on the existing network, the present invention In the embodiment, four IP packet...

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PUM

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Abstract

The present invention discloses IP message slicing recombination method. Said method includes 1, recombination device receiving IP message new slicing and merging it with adjacent slicing in received slicing; 2, recombination device to make recombination overlapping checking to merged slicing. The present invention overcomes current technologic shortage, simplifying overlapping checking calculation complexity, raising treatment efficiency, reducing pointer occupied storage space.

Description

technical field [0001] The invention relates to the technical field of IP packet fragment reassembly, and specifically relates to an overlapping inspection technology during IP packet reassembly. Background technique [0002] Due to the low cost, flexible networking and good scalability of the Ethernet network, more and more IP data are carried on the Ethernet. , packets that are too long must be fragmented and reassembled. [0003] The data field used for fragment reassembly is defined in the data structure of the IP message. The data structure of the IP message header is as follows: [0004] [0005] The data structure is described as follows: [0006] [0007] [0008] Among them, the fields that play a key role in fragment reassembly are Total Length, Identification, Flags, and Fragment Offset. When the same IP packet is fragmented, the Identification is always maintained, that is, multiple fragments use the same ldentification, combined with SIP (source IP a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L29/06H04L47/43
Inventor 何军
Owner HUAWEI TECH CO LTD