CAJ | 학술논문

介绍了一种应用于未来大容量、多业务接入场景下的称为光正交频分复用无源光网络的下一代接入网技术,并提出了一种基于此结构的称为基于服务质量需求的固定周期流水线轮询动态带宽分配算法.该算法通过应用二级带宽分配机制、带宽预申请机制和最小带宽申请优先原则等方法,有效地保障了在大容量、多业务接入场景下各个业务不同的服务质量需求.为研究其性能,建立了该算法的仿真模型并进行了对比仿真.仿真结果显示该算法以低时延和低抖动有效地支持快速转发业务,同时平衡了确保转发业务和尽力而为业务之间的优先性和相对公平性,并且实现了不同光网络单元间的同优先级业务带宽分配的公平性.与传统的动态带宽分配算法算法相比,基于服务质量需求的固定周期流水线轮询动态带宽分配算法具有执行效率高、算法复杂度低、性能良好等优点,并且能够更好地适应光正交频分复用无源光网络的特性,发挥网络最大的性能.
개소료일충응용우미래대용량、다업무접입장경하적칭위광정교빈분복용무원광망락적하일대접입망기술,병제출료일충기우차결구적칭위기우복무질량수구적고정주기류수선륜순동태대관분배산법.해산법통과응용이급대관분배궤제、대관예신청궤제화최소대관신청우선원칙등방법,유효지보장료재대용량、다업무접입장경하각개업무불동적복무질량수구.위연구기성능,건립료해산법적방진모형병진행료대비방진.방진결과현시해산법이저시연화저두동유효지지지쾌속전발업무,동시평형료학보전발업무화진력이위업무지간적우선성화상대공평성,병차실현료불동광망락단원간적동우선급업무대관분배적공평성.여전통적동태대관분배산법산법상비,기우복무질량수구적고정주기류수선륜순동태대관분배산법구유집행효솔고、산법복잡도저、성능량호등우점,병차능구경호지괄응광정교빈분복용무원광망락적특성,발휘망락최대적성능.
An architecture of next generation access network namely orthogonal frequency division multiplexing passive optical network was presented, which has high spectrum efficiency, fine bandwidth granularity and low cost. A novel efficient dynamic bandwidth allocation algorithm based on orthogonal frequency division multiplexing passive optical network namely fixed cyclic polling in pipeline dynamic bandwidth allocation algorithm was investigated. To meet the quality of service requirements under multi-services access scenario, two level bandwidth allocation mechanisms, bandwidth pre-request for expedited forward service and the smallest bandwidth request allocated the first principle for assured forwarding and the best effort services were applied in this algorithm. A simulation was conducted to study the performance of fixed cyclic polling in pipeline dynamic bandwidth allocation algorithm in orthogonal frequency division multiplexing passive optical network. The results show that the proposed algorithm supports expedited forwarding services with low packet average delay and low jitter, balances priority and fairness between assured forwarding services and best effort services, and achieves bandwidth allocation fairness among different optical network units in the same priority. Compared with the traditional dynamic bandwidth allocation algorithms, fixed cyclic polling in pipeline algorithm meets the quality of service requirements excellently, and adapts orthogonal frequency division multiplexing passive optical network better with higher bandwidth efficiency and lower algorithm complexity.