EPON (Ethernet Passive Optical Network) network protection switching quick ranging system
A network protection and fast technology, applied in the field of EPON network, can solve problems such as long service interruption time, hidden danger of service interruption, loss of uplink service, etc., and achieve the effect of improving network experience, saving time, and improving stability
Active Publication Date: 2022-01-11
芯河半导体科技(无锡)有限公司
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Problems solved by technology
[0021]
The limitation of the technical method of method 1 is that it needs to re-measure the distance, which takes at least 100 milliseconds, and the service interruption time is too long, which affects the user experience;
[0022] The technical limitation of method 2 is that the entire active and standby PON port network cannot be changed during use. If a new ONU user event occurs or the trunk fiber distance of the standby PON port changes, the standby OLT PON port needs to update all ONUs under the ODN in time. RTT information, then it is necessary to stop the network service of the current main PON port and switch to the backup PON port for re-ranging and record the ranging information, and then switch back to the main PON port network; If there is a distance difference in the optical fiber or an ONU is newly added, the ONU data under the PON port of the backup OLT will miss the sending time slot allocated by the OLT, so that the upstream service of the entire system will be seriously lost; the protection switching can be the same OLT Two OLT PON ports with different line cards can also be OLT PON ports on different line cards, so the uncertainty of the system environment is very common. Once such a situation occurs, it is easy to cause potential business interruption, and Extremely inconvenient to maintain
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[0039] Below in conjunction with accompanying drawing, the realization of the present invention is described in further detail:
[0040] The invention discloses a system for fast ranging of EPON network protection switching, including a main OLT PON port, a backup OLTPON port, an ODN and N ONUs, and the main OLT PON port completes registration and activation with the N ONUs and performs network service interaction. The standby OLTPON port synchronizes the service configuration of the primary OLT PON port in real time, and the sending end of the standby OLT PON port is closed; The ONU with the LLID feeds back the Report message; the standby OLT PON port receives the Report message, extracts the time stamp information and calculates the new loop delay time RTT new , according to the new loop delay time RTT new with the old loop delay time RTT old The result of the comparison determines the final RTT information.
[0041] Discovery2 is a special message, which is a transformat...
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The invention relates to the technical field of EPON (Ethernet Passive Optical Network), in particular to an EPON protection switching quick ranging system, which comprises a main OLT (Optical Line Terminal) PON port, a standby OLT PON port, an ODN (Optical Distribution Network) and N ONUs, the main OLT PON port and the N ONUs finish registration activation and perform interaction of network services, the standby OLT PON port synchronizes service configuration of the main OLT PON port in real time, and the standby OLT PON port can quickly finish ranging calculation of all ONUs by issuing a special Discover message. And then receiving the message of the ONU according to the specified time slot by using the new RTT information. According to the invention, under the condition that the number of ONUs and the trunk distance change dynamically, the switching service interruption time is reduced, the user experience is improved. The system stability is improved.
Description
technical field [0001] The invention relates to the technical field of EPON networks, in particular to a system for fast ranging of EPON network protection switching. Background technique [0002] With the development of network technology, the demand of users to use the network to transmit a large amount of voice, data and video services continues to increase, and Passive Optical Network (PON) has emerged as the times require; [0003] The topology of the PON system is as follows figure 2 As shown, the system usually consists of OLT (Optical Line Terminal, Optical Line Terminal), ODN (Optical Distribution Network, Optical Distribution Network) and ONU (Optical Network Unit, Optical Network Unit), using P2MP (Point to More Point, point to multi-point) network structure; at present, PON technology mainly adopts TDM (Time Division Multiplexing, time division multiplexing) and WDM ((Wavelength Division Multiplexing, wavelength division multiplexing) methods; in the TDM PON sys...
Claims
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IPC IPC(8): H04B10/032H04B10/038H04Q11/00
CPCH04B10/032H04B10/038H04Q11/0067H04Q2011/0081Y02D30/00
Inventor龙光平
Owner芯河半导体科技(无锡)有限公司