Method, device and system for avoiding gpon system encryption enabling instantaneous packet loss
An encryption function, GEM-PORT technology, applied in key distribution, can solve the problems of OMCC message loss, key inconsistency, undefined downlink encrypted transmission implementation process, etc., to achieve the effect of enhancing stability and avoiding short-term packet loss
Active Publication Date: 2017-11-07
ZTE CORP
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However, since the specific implementation process of the entire downlink encryption transmission is not defined in the standard, the usual practice in the prior art for downlink encryption transmission is to enable downlink encryption after the ONU registers with the OLT
When the OLT enables downlink encryption, the key stored in the OLT and the ONU may be inconsistent. If the key used by the OLT to encrypt the downlink frame and the key used by the ONU to decrypt the downlink frame are different, the downlink frame will be lost.
If the downstream encryption is the ONU Management Channel (ONU Management and Control Channel, OMCC), it will also cause the loss of OMCC messages, affecting the stability of the system operation
[0005] Therefore, in the prior art, there is a packet loss defect caused by unequal keys between the OLT and the ONU at the moment when the downlink encryption is enabled in the GPON system, which affects the stability of the system operation, and the existing downlink encryption transmission implementation process needs to be improved
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[0043] In order to make the object, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0044] Such as figure 1 As shown, the embodiment of the present invention provides a method for avoiding the instant packet loss of GPON system downlink encryption, which is applied in the optical line terminal OLT, and the method includes:
[0045] Step S10, performing key synchronization with the optical network unit ONU;
[0046] Step S20, after the key synchronization is completed, the encryption function is enabled, and the ONU is notified to enable the decryption function.
[0047] In step S20, since ONU and OLT have completed the key synchronization, therefore, the keys...
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The invention discloses a method for avoiding instant packet loss in the downlink encryption of a GPON system, which is applied to an optical line terminal OLT, including: performing key synchronization with an optical network unit ONU; after completing the key synchronization, enabling the encryption function, and Inform the ONU to enable the decryption function. The present invention also provides a device for avoiding instant packet loss in the downlink encryption of the GPON system, which is applied to the optical line terminal OLT, and includes: a key synchronization module, which is used to perform key synchronization with the optical network unit ONU to complete key synchronization. Notify the encryption enabling module after synchronization; the encryption enabling module is used to enable the encryption function after receiving the notification from the key synchronization module, and notify the ONU to enable the decryption function. The present invention synchronizes the key between the OLT and the ONU before the downlink encryption is enabled, ensuring that the keys in the OLT and the ONU are equal at the moment when the downlink encryption is turned on, avoiding short-term packet loss, and enhancing the stability of the system operation sex.
Description
technical field [0001] The present invention relates to the technical field of optical fiber access, in particular to a method, device and system for avoiding instant packet loss when downlink encryption is enabled in a GPON system. Background technique [0002] Gigabit-Capable PON (GPON) is a new type of optical fiber access network technology. It adopts point-to-multipoint mechanism and passive optical fiber transmission to provide multiple services on Ethernet. GPON adopts passive optical network (Passive Optical Network, PON) technology at the physical layer, uses Ethernet protocol at the link layer, and uses the topology of PON to realize the access of Ethernet. Therefore, GPON integrates PON technology and Ethernet The advantage of the technology is that it has the advantages of low cost, high bandwidth, strong scalability, flexible and fast service reorganization, and it is compatible with the existing Ethernet and easy to manage. [0003] The uplink of the PON syste...
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IPC IPC(8): H04L9/08H04L1/16
Inventor 李二洁
Owner ZTE CORP