Dynamic bandwidth allocation method of network slice and OLT

Abstract

A dynamic bandwidth allocation method of network slices and an OLT relate to a DBA method of a PON system, and the method comprises the steps of a1, setting a service quality level of each network slice, and establishing a corresponding relationship with T-CONT; configuring the remaining bandwidth scheduling type of the T-CONT to be none, NA or BE; a2, according to the bandwidth requirement collected in the last DBA period of each T-CONT, allocating the bandwidth of the current DBA period to the network slice, wherein the bandwidth allocated to each T-CONT is not greater than the sum of the fixed bandwidth and the guaranteed bandwidth; a3, if the PON port has the unallocated bandwidth, sequentially meeting the bandwidth requirements of the T-CONT with the remaining bandwidth scheduling type of NA according to the service quality level; and a4, if the PON port still has the unallocated bandwidth, sequentially meeting the bandwidth requirements of the T-CONT with the remaining bandwidthscheduling type of BE according to the service quality level. According to the invention, differentiated quality guarantee services are provided for different network slice users.

Description

technical field [0001] The present invention relates to a dynamic bandwidth allocation (Dynamic Bandwidth Allocation, DBA) method for a passive optical network (Passive Optical Network, PON) system, specifically a dynamic bandwidth allocation method for network slicing and an OLT. Background technique [0002] The PON access network is an all-optical access network with a point-to-multipoint structure. It adopts passive optical fiber transmission and can carry multiple services such as data, voice and video at the same time. Its main components are optical line terminal (Optical LineTerminal, OLT), optical network unit (Optical Network Unit, ONU) and optical distribution network ( OpticalDistribution Network, ODN) composition. [0003] Due to the point-to-multipoint feature of the PON access network, the PON network is regarded as a very economical access technology and has been widely welcomed. The operator can access multiple ONUs through the ODN under one PON port, and ...

AI Technical Summary

Problems solved by technology

[0005] However, the quality of service of existing OLT equipment is realized based on physical PON ports, and it is impossible to guarantee the quality of service between slices when multiple slices share PON ports

Specifically, the dynamic bandwidth allocation (DBA) algorithm of the OLT performs bandwidth scheduling and allocation for all T-CONTs in the entire PON port, resulting in indiscriminate mixed scheduling among all slices, which cannot be prioritized for high-value slice users. required bandwidth, and cannot optimize latency for high-value slice users

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