Periodical polling dynamic bandwidth distribution algorithm based on QoS (Quality of Service) in OFDM-PON (Orthogonal Frequency Division Multiplexing-Passive Optical Network)

Abstract

The invention discloses a periodical polling dynamic bandwidth distribution algorithm based on a QoS (Quality of Service) in an OFDM-PON (Orthogonal Frequency Division Multiplexing-Passive Optical Network), belonging to the category of optical fiber communication systems. In the periodical polling dynamic bandwidth distribution algorithm based on the QoS, the priority and the fairness of bandwidth distribution among priority levels are balanced through a secondary dynamic baseband distribution mechanism among the priority levels and inside the priority levels, therefore, the priority that a high priority level service occupies a bandwidth is ensured, the relative fairness of bandwidth distribution among priority levels is also ensured, and the fairness of bandwidth distribution among ONUs (Optical Network Unit) is fully ensured. The periodical polling dynamic bandwidth distribution algorithm based on the QoS can be suitable for an optical access network system utilizing the OFDM-PON. The invention has the advantages of strong practicability, full insurance of QoS, low arithmetic complexity, low cost and the like.

Description

technical field [0001] The invention relates to a novel QoS-based periodic polling dynamic bandwidth allocation algorithm in an Orthogonal Frequency Division Multiplexing Passive Optical Network (OFDM-PON) system, belonging to the category of optical fiber communication systems. Background technique [0002] As we all know, the explosive growth of Internet services and the continuous progress of multimedia technology have stimulated the rapid development of digital, IP, intelligent and personal communication networks. At present, the transmission network has basically realized digitalization and optical fiber, and the switching network has also basically realized digitalization and program control. However, the user access network, which is dominated by copper wires and is called the "last mile", is developing slowly, which directly affects The capacity, quality, and speed of services provided by the telecommunication network and the development and utilization of network re...

AI Technical Summary

Problems solved by technology

The dynamic bandwidth allocation algorithm of the original PON technology is mainly designed based on TDMA, such as the adaptive periodic interpolation polling (IPACT) algorithm based on the EPON architecture, which cannot adapt to the characteristics of the new OFDM-PON architecture, so It is imperative to develop a new dynamic bandwidth allocation algorithm that can well adapt to the OFDM-PON system and can meet the quality of service (QoS) requirements of multi-service access

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