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Method for recombining IP message

A technology of IP message and IP fragmentation, which is applied in the field of IP message, can solve the problem that IP fragmentation cannot be handled simply and effectively, and achieve the effect of simplifying the implementation method of reorganization and reducing the implementation cost

Inactive Publication Date: 2006-11-08
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 reorganizing IP message fragments, so as to solve the problem in the prior art that IP fragments that exceed the length limit of equipment reassembly cannot be handled simply and effectively

Method used

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

Examples

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Embodiment Construction

[0034] The basic principle of the present invention is that when adding encapsulation headers to packet fragments reorganized by convergence devices of various IP-based tunnel technologies such as L2TP, the fragments that exceed the reassembly length limit, the fragments that are less than the reassembly length limit, and just Fragments that exceed the reassembly length limit are processed separately. Fragments that are smaller than the reassembly length limit are forwarded to the reassembly module for reassembly, and fragments that are greater than the reassembly length limit are directly transparently forwarded. For those that just exceed the reassembly length limit The fragments send their virtual trailers to the reassembly module while directly transparently transmitting and forwarding them. The reassembly module completes the reassembly based on the fragments and false fragments that are less than the reassembly length limit.

[0035] as attached image 3 As shown, A, B a...

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Abstract

The present invention discloses IP message recombination method. Said method includes A, channel selection module less than recombination limitation of length IP slicing retransmission recombination module of recombination equipment, directly transparent transmission retransmission greater than recombination limitation of length IP slicing, transmitting its offset to recombination module for recombination in transparent transmission retransmission just trans- recombination limitation of length IP slicing; B, recombination according to channel selection module retransmitted IP slicing and offset to make recombination, then used as new IP slicing to retransmit. The present invention overcomes current technologic shortage, simplifying IP slicing recombination implementation method, and reducing realizing cost.

Description

technical field [0001] The present invention relates to the technical field of IP messages, in particular to the fragment reassembly technology of IP messages. Background technique [0002] Because the Ethernet has the characteristics of low cost, flexible networking and good scalability, more and more IP (Internet Protocol) data is carried on the Ethernet, but because the Ethernet has an upper limit of 1500Byte for the payload length, resulting in When IP packets pass through the Ethernet, the packets that are too long must be fragmented and reassembled. [0003] IP 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Version=4 IHL TOS Total Length Identification Flags Fragment Offset TTL Protocol ...

Claims

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Application Information

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IPC IPC(8): H04L47/43
Inventor 何军
Owner HUAWEI TECH CO LTD
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