CAJ | 학술논문

该文基于ITU-T所制定的传送多协议标记交换标准,对客户端承载基于电路交换类型的业务进行了深入研究,比较了不同长度的电路业务分组对该业务延时和抖动的影响,并提出了一种动态改变电路业务封装包长的方案.该方案根据业务接收端数据的时延和方差统计情况,来计算一定范围内合适的电路业务净荷长度并反馈给源端的业务适配模块进行调整.为分析该方案的有效性,利用OPNET仿真软件搭建平台进行仿真.结果表明,该方案与固定封装包长方案相比在业务抖动特性和传输效率上具有明显的优势,能很好地适应电路业务的承载要求.
해문기우ITU-T소제정적전송다협의표기교환표준,대객호단승재기우전로교환류형적업무진행료심입연구,비교료불동장도적전로업무분조대해업무연시화두동적영향,병제출료일충동태개변전로업무봉장포장적방안.해방안근거업무접수단수거적시연화방차통계정황,래계산일정범위내합괄적전로업무정하장도병반궤급원단적업무괄배모괴진행조정.위분석해방안적유효성,이용OPNET방진연건탑건평태진행방진.결과표명,해방안여고정봉장포장방안상비재업무두동특성화전수효솔상구유명현적우세,능흔호지괄응전로업무적승재요구.
This paper studies encapsulated packet length of circuit traffic in the multi-service transport multi- protocol label switching network, which based on ITU-T standards. And the paper compared the performance of the network according to different TDM packet length. Then, an adjustment scheme is proposed to change the packet length dynamically. With the consideration of the real-time conditions of the traffic's latency and variance, this scheme calculates the suitable payload sizes in the destination node and feeds back to the source node, in order to adjust this size in the adaptation module. This scheme is implemented in a testbed based on OPNET modeler for performance evaluation. The simulation results show that, compared with traditional constant bit encapsulation scheme, this scheme works more effectively both on the transmission quality and efficiency, and meets the requirement of supporting circuit traffic.