David H. Lu

Performance Monitoring with Predictive QoS Analysis of LTE Backhaul

LTE (Long Term Evolution) represents an emerging technology that will change how mobility service providers connect user devices to their infrastructure over IP networks. To support growing mobile broadband data loads, an all-IP Ethernet cell site backhaul (CSBH) network infrastructure will make possible real-time high bandwidth applications using mobiles. This paper discusses the changes that LTE will bring and examines network operations impacts on the CSBH. It also introduces operations support system solutions to address performance management (PM) to determine if impaired LTE service has occurred. This paper covers major aspects of system solutions, including: capabilities for auto-detection, root-cause analysis based on correlation algorithms, and traffic congestion control mechanisms. It also presents functionality for quality of service (QoS) trending projections to manage traffic capacity and trigger the traffic control mechanisms, to protect network resources and improve the overall customer experience.

Detection and Handling of TRUNK Congestion in the ATM Network

This paper presents a management structure and methodology for determining a root cause of trunk delay due to trunk congestion events. Based on trunk delay measurements, we conclude that a High Trunk Utilization (HTU) alert can be determined by correlating Constant Bit Rate (CBR) and Variable Bit Rate-non real time (VBR-nrt) trunk delay data. An automated adaptive procedure is developed to prevent trunk congestion before the user is impacted.