A dynamic bandwidth allocation method for network slicing and OLT

Abstract

A kind of dynamic bandwidth allocation method and OLT of network slice, relate to the DBA method of PON system, comprise: a1. set each network slice quality of service level, set up the corresponding relationship with T-CONT; The remaining bandwidth scheduling type of configuration T-CONT is none, NA or BE; a2. According to the bandwidth requirements collected in the last DBA cycle of each T-CONT, allocate the bandwidth of the current DBA cycle to the network slice, and make the bandwidth allocated by each T-CONT not greater than the sum of the fixed bandwidth and the guaranteed bandwidth ; a3. If the PON port has unallocated bandwidth, the bandwidth requirements of T-CONT with the remaining bandwidth scheduling type of NA will be met in order according to the quality of service level; a4. If there is still unallocated bandwidth at the PON port, the remaining bandwidth will be met in order according to the quality of service level Bandwidth requirements of T‑CONT whose scheduling type is BE. The present invention provides differentiated quality assurance services 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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