Toward Optimizing System Capabilities in a CWMP Network

  • 李 坤敏

Student thesis: Doctoral Thesis

Abstract

Enhanced with the auto-configuration and management features CPE (customer premises equipment) WAN (wide area network) management protocol (CWMP) has now become widely used by service providers and operators However the system performance of CWMP is limited by the first-come first-served (FCFS) implementation and the client/server management architecture between the CPEs and auto configuration servers (ACSs) Therefore a dynamic rescheduling scheme is adopted to overcome the limitation of the FCFS implementation Specifically a cost transfer function that considers the estimated processing time the remaining lifetime and the waiting time of each session is utilized to provide a proper ranking cost for the rescheduling scheme In addition this research creates a new design by combining a sub-ACS concept with a dynamic client grouping to extend the management capacity of CWMP By leveraging regrouping and repackaging requests/responses of the same CPE type the total number of CPEs that an ACS can manage simultaneously is greatly increased On the other hand as CWMP is designed to manage a huge number of devices a single server may be degraded by a large number of simultaneous requests issued by clients Hence load balancing (LB) mechanisms are usually applied in CWMP-based management systems The assignment of static LB policies adopted in CWMP-based management systems is straightforward and efficient because the parameters and attributes are predefined Thus the main tasks of such management systems in large-scale environments are not handling and distributing workloads; rather the major functions are predicting unexpected crash events and preventing reassignment of LB policies Consequently a self-learning predictor (SLP) combined with a sticky session is proposed to predict unexpected crash events The experimental results show that the system performance in terms of resources utilization and throughput can also be significantly improved Furthermore a set of simulation experiments were conducted to verify the effectiveness of all proposed approaches in this dissertation From the experimental studies the system capabilities in a CWMP network are optimized with our proposed scheme
Date of Award2016 Aug 24
Original languageEnglish
SupervisorWei-Guang Teng (Supervisor)

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