Hello,
Today, I will introduce you to how to implement DBA in GPON.
First of all, DBA refers to dynamic bandwidth allocation, which is a dynamic allocation mechanism that can complete the upstream bandwidth of a GPON terminal ONT within a time interval of the order of microseconds or milliseconds. It can improve the bandwidth utilization of the upstream line of the OLT PON port at the central office in GPON, add more users to the PON port, and enable users to enjoy higher bandwidth services, especially those services with large bandwidth changes.
The implementation of DBA is generally that the DBA module inside the OLT continuously collects the DBA report information, performs related calculations, and sends the calculation results to the ONUs in the form of BWMap in the downlink frame. Each ONU sends uplink data in the time slot allocated to it according to the BWMap information, occupying uplink bandwidth.
That is, the OLT dynamically adjusts and allocates the uplink bandwidth to the ONU according to the upstream burst traffic demand of the ONU, which not only meets the ONU upstream bandwidth requirement but also improves the bandwidth utilization of the PON system.
The DBA principle process is as follows:
1- The DBA module inside the OLT continuously collects DBA report information and calculates it through the DBA algorithm.
2- The OLT sends the calculation results to each ONU in the form of a BW Map.
3- Each ONU sends uplink burst data in allowed time slots according to the BW Map information, occupying uplink bandwidth.
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