Cascading method and system for optical network units

Abstract

The invention discloses a cascading method and system for optical network units, and belongs to the field of power communication. The cascading method for the optical network units includes the steps that the proxy ONU sends a discovery message to the extension ONU, wherein the discovery message carries a first server address of the proxy ONU, the proxy ONU is directly connected with an OLT, and the expansion ONU is directly or indirectly connected with the proxy ONU; the proxy ONU receives a register message from the expansion ONU, wherein the register message is sent by the expansion ONU according to the first server address and carries equipment information of the expansion ONU; the proxy PNU updates local serial server information and kilomega Ethernet port information according to the equipment information and reports the serial server information and the kilomega Ethernet port information to the OLT. By means of the cascading method and system, the effects that the bandwidth utilization rate is increased and establishment cost is reduced are achieved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and system for cascading optical network units. Background technique [0002] Currently, the maximum splitting ratio of the optical splitting device connected under each PON (Passive Optical Network, Passive Optical Network) port of the EPON (Ethernet Passive Optical Network, Ethernet Passive Optical Network) system is 1:64, that is, each PON port Up to 64 ONUs (Optical Network Unit, Optical Network Unit) can be connected below. [0003] At present, the power ONU in the power market generally has 4 serial ports, and each serial port can support two standards of RS232 and RS485. Although the RS485 bus generally supports 32 nodes, the serial bus works in the master-slave mode. That is, at a certain time, only one master can send and other slaves can receive. In addition, the two standards of RS232 and RS485 have a very low rate of serial data transmission and reception....

AI Technical Summary

Problems solved by technology

[0003] At present, the power ONU in the power market generally has 4 serial ports, and each serial port can support two standards of RS232 and RS485. Although the RS485 bus generally supports 32 nodes, the serial bus works in the master-slave mode. That is, only one master can send at a certain time, and other slaves can receive

In addition, the serial port data sending and receiving rates of RS232 and RS485 standards are inherently low. Even if the maximum baud rate is 115200, the data bandwidth that each power ONU needs to upload is only 4x115200 / 1024=450kbps

Moreover, the amount of data forwarded by the power ONU responsible for the data collection of the electric meter is very low, so compared with the maximum 1G bandwidth allocated to each ONU, there will be a lot of waste. If the number of read meters is large, it will need a lot of ONU, even more OLT (Optical Line Terminal, Optical Line Terminal) equipment is required

[0004] Therefore, the current working mode of the power ONU leads to low bandwidth utilization, which greatly increases the construction cost

[0005] Aiming at the problem that the working mode of the power ONU in the related technology leads to low bandwidth utilization and greatly increases the construction cost, no effective solution has been proposed yet

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