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Ciphering mode switching method for G bit passive optical fiber network system

A passive optical fiber network, encryption mode technology, applied in optical transmission systems, transmission systems, digital transmission systems, etc., can solve the problem that the ONU cannot receive downlink messages correctly, and achieve the effect of avoiding the loss of downlink messages

Inactive Publication Date: 2012-11-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the encryption mode switching mechanism is not involved in the existing G.984.3 standard, and how the OLT and ONU switch the encryption mode is not described. If the encryption mode switching of the OLT and ONU is not synchronized, it may cause the ONU to fail to receive part of the downstream information

Method used

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  • Ciphering mode switching method for G bit passive optical fiber network system
  • Ciphering mode switching method for G bit passive optical fiber network system
  • Ciphering mode switching method for G bit passive optical fiber network system

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Embodiment Construction

[0015] Encrypted mode switching method in the GPON system of the present invention is by improving Encrypted_VPI / Port-ID message (change encrypted mode message), as shown in table 1, makes in the improved Encrypted_VPI / Port-ID message carry multiframe number (8- 11 bytes), the OLT and the ONU perform synchronous switching of the encryption mode according to the multiframe number.

[0016] The improved Encrypted_VPI / Port-ID message is shown in Table 1:

[0017] Table 1

[0018]

[0019]

[0020] The improved Encrypted_VPI / Port-ID message carries the multiframe number, that is, bytes 8-11 in the message structure in Table 1. Before initiating the encryption mode change, the OLT first determines a certain multiframe number in the future, sends the multiframe number together with the Encrypted_VPI / Port-ID message to the ONU, and informs the ONU to switch the encryption mode at the beginning of the corresponding multiframe, and the OLT also The encryption mode will be switc...

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Abstract

The invention discloses a method for switching encryption mode of a gigabit passive optical network (GPON) system, which comprises the following steps: an Encrypted_VPI / Port-ID message is sent to an optical network unit by an optical transmission line terminal, so as to inform the optical network unit of altering the encryption mode; the Encrypted_VPI / Port-ID message is carried with multiframe number; an acknowledge message is responded to the optical transmission line terminal after the Encrypted_VPI / Port-ID message is received by the optical network unit; the optical transmission line terminal and the optical network unit are synchronously switched to the encryption mode when a multiframe corresponding to the multiframe number comes. The invention enables the encryption modes of OLT andONU to be synchronously switched through improving the Encrypted_VPI / Port-ID message, and avoids possibly missing downlink message.

Description

technical field [0001] The invention relates to a broadband optical access technology, in particular to an encryption mode switching method of a gigabit passive optical fiber network system. Background technique [0002] In Gigabit Passive Optical Network (GPON, Gigabit Passive Optical Network) system, multiple Optical Network Units (ONUs) can be connected to one Optical Transmission Line Terminal (OLT), and the downlink message from OLT to ONU is sent in the form of broadcast , considering security, the downlink message between OLT and ONU can be encrypted. [0003] In the process of changing the encryption mode, the OLT notifies the ONU to modify the encryption mode (encryption or non-encryption) by sending PLOAM (physical layer OAM), and then the OLT and ONU each perform encryption mode switching, that is, switching from encryption to non-encryption, or never encryption Switch to encryption. [0004] However, the encryption mode switching mechanism is not involved in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/00H04L1/16H04L12/28H04B10/12H04B10/85
Inventor 张伟良
Owner ZTE CORP