A Dynamic Bandwidth Allocation Method for Adjusting Bandwidth Allocation Parameters Based on Time Division Multiplexing

Abstract

The invention discloses a dynamic bandwidth allocation method for adjusting bandwidth allocation parameters based on time division multiplexing. cycle‑1 , to establish the arrival time of this cycle, and then the OLT detects each ONU in turn, sends authorization, and analyzes the packet loss rate of each link business and the comprehensive delay ratio k i ; OLT receives REPORT messages from all ONUs, and performs data processing; obtains the allocation results according to the algorithm, encapsulates the allocation results into GATE messages and broadcasts them; ONUs receive broadcast messages and match MAC addresses to obtain corresponding bandwidth allocation messages, and wait for data transmission; When the time comes, the ONU starts to transmit data according to the data priority; the OLT waits for the next polling time period T cycle+1 Arrive, and start the cycle all over again. The invention can self-adapt the bandwidth allocation parameters, and balance the relationship between the OLT bandwidth request polling time period and the line overhead.

Description

technical field [0001] The invention relates to a dynamic bandwidth allocation method, in particular to a dynamic bandwidth allocation method for adjusting bandwidth allocation parameters based on time division multiplexing. Background technique [0002] The uplink access of the PON (passive optical network) system generally adopts a combination of fixed allocation and control on-demand allocation, that is, static bandwidth allocation and dynamic bandwidth allocation (DBA) in the ITU-T G983.4 specification. According to the technical requirements of China Unicom, the EPON (Ethernet Passive Optical Network, Ethernet Passive Optical Network) system should adopt the dynamic bandwidth allocation (DBA) mechanism to improve the system uplink bandwidth utilization and ensure business fairness and QoS (Quality of Service, quality of service) ), it should be able to allocate bandwidth authorization according to queue status information reported by LLID (Logical Link Identifier, logic...

AI Technical Summary

Problems solved by technology

First, several existing algorithms focus on describing the allocation of T-CONT, without considering the data transmitted by each ONU and the specific situation of the ONU itself; second, in the original broadband allocation mechanism, each queue is prioritized in the ONU The forwarding data method of hierarchical scheduling will lead to the mutual restriction of bandwidth utilization and fairness. The heavy-loaded optical network unit is not allocated sufficient bandwidth, so that data services are piled up and cannot be transmitted; light-loaded optical network units often Sufficient bandwidth is allocated to cause waste of resources; third, sometimes the actual situation of the ONU is different from the information stored on the OLT side, the information is not updated in time, the ONU has no data load, and the OLT still allocates bandwidth. The time period of OLT bandwidth request polling will increase the line overhead

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