Byungdeok Chung

Advanced Scheme to Reduce IPTV Channel Zapping Time

IPTV just has been spread throughout the world. For the success of IPTV service, it is a key feature to satisfy QoS (Quality of Services) of total IPTV solution, such as tolerable channel zapping time. A related work reduces IPTV channel zapping time using a home gateway to take a role of IGMP-proxy. However, the related work considers the only case that a subscriber selects an adjacent channel of the current one. Additionally the related work requires a home gateway for each subscriber. In this paper, we propose a solution for the two problems using rating server without home gateway. Settop boxes instead of home gateways join or leave the adjacent channel groups for fast changes to the adjacent channels. Additionally settop boxes obtain an expected channel list by sending a query message to rating server and join the expected multicast groups in advance.

Fault Localization for Heterogeneous Networks Using Alarm Correlation on Consolidated Inventory Database

Over the decades, various fault localization techniques are introduced for the surveillance of the modern complex communication networks. But most of them analyze the events with limited data of network equipment configuration and the topology among them. But the analysis of alarm correlation based on the detailed end-to-end network view point is necessary to improve the effect of fault localization technique on complicated telecommunication networks. For this purpose, the database which supports the alarm correlation should be the integrated one which contains the information of the network elements and their connections in detail. We propose fault localization method which covers complex networks, e.g., SDH networks, IP backbone networks, IP access domain networks, xDSL networks and etc. The technique utilizes the CID(Consolidated Inventory Database) and applies the root cause event extraction method instead of problem-symptom model. And the implementations of the proposed system will be described. Then we discuss the various applications of the fault localization results on CID.

A Study on the Service Quality Management Process and Its Realization Strategy for Capturing Customer Value

In the work presented here, we introduce the NGOSS (Next Generations Operations Systems and Software) and eTOM (Enhanced Telecom Operations Map) and study the service quality management process with eTOM. We propose guideline of service quality management business process by drawing process flow diagrams among eTOM L2 and L3 processes. Then to make a standard functional model for developing OSS supporting service quality management, we derive primary necessary functions for service quality management and resource performance management process elements. With the result of this research and our experience of operations and management on a telecommunication network, we propose improvement directions of service quality management and its implementation strategy.

Energy/carbon management network for IT equipments

IT (Information Technology) is known as one of the best solution to slow down the global warming by various industry sectors. IT equipments are responsible of 2% of GHG emission of total. Especially, Concentrate Energy Consuming Facilities such as Data Centers are to blame most as increasing sources of global warming caused by energy consumption by IT network equipments. This paper shows how to manage and control the energy consumed by IT equipments such as switches, routers, storages and servers loaded in a rack type facility. How to collect the energy consumption data from the individual equipment effectively and how to monitor and save the energy in a smart way without interrupting the services by introduction of Energy/Carbon Management Platform are to be explained. Smart Rack, Intelligent PDU (i-PDU), SECMP (Smart Energy/Carbon Management Platform) are introduced in this paper.

Design of a rule engine for analyzing messages from network elements

With the rapid changes taking place in the network operation environment, ISPs today face a challenge. Networks are becoming more complex with the inclusion of diverse types of devices. New services such as IPTV and VoIP make the jobs of network administrators more difficult, by requiring new equipment, with new protocols and new technologies. As well, ISPs are forced to reduce the costs of network management, as the harsh competition in the market is an obstacle to increasing and strengthening management personnel. ISPs must maximize the efficiency of network management by having a small number of engineers deal with their complex networks. For network administrators to overcome these challenges, they need a support tool. In this paper, we will introduce our efforts to design and implement a rule engine that can take the dizzying array of messages coming from all kinds of network equipment and change it to a much more readable form.

A study on finding optimal network operators level

This paper considers the optimal staffing level of network operations and management centers in a telecommunication company. This kind of problem is very important for the survival of telecommunication companies since their growth potential is threatened and they need to reduce operating expenditures. To achieve the optimal staffing level, we propose linear programming technique that is one of most frequently used in management science field. We formulate a linear programming model for a network operations management center and give a typical example for the illustration. In addition, we develop a system to implement the linear programming model for a large telecommunication company.

Service fault localization using functional events separation and modeling of service resources

Today many services over the networks, e.g., IPTV(Internet Protocol TV), web-based services are introduced to extend the business area of telcos( telecommunication companies). Therefore fault localization technique should be enhanced to cover the application layer. In this paper, we propose the rule-based alarm correlation method with functional event separation. And we also suggest modeling strategy for service resources and functional dependencies to enable those techniques. The proposed service fault localization method enables end to end service fault localization including application layer with less complexity and we prove it by implementing the pilot system for representative fault cases of real IPTV services.

Field Operations Management and Unmanned Operations Management toward NOM 2.0

In this paper we study changes for telecommunication network operations and management environments. In addition, we review the concept of NOM 2.0 to cope with these environments changes. Finally, we introduce field operations management and unmanned operations management architectures for implementations of NOM 2.0 in KT. This paper is the first step of study for the implementation of NOM 2.0. We expect that several other researches and developments toward NOM 2.0 start referring to this research.

Access network service delivery using nested workflow process

The current issue for the access network service delivery is to swiftly accommodate newly generated service product by way of minimizing the influence caused by the change of the legacy system. Korea experienced the rapidly changing access network facility. In order to follow up rapidly changing environment, network service providers (NSP) have to develop the flexible and cost effective operations support systems (OSS). The service delivery management based on the conventional concepts is difficult to support the proper service delivery of the newly compound and cross-domain Internet services. Because of the severe competition among the service providers, the dense house pattern near the wire center, the governmental support, and the huge demands for Internet usage among the younger generation, the importance of the access network service delivery grows larger. We propose a nested workflow process for the cross domain Internet service with PM (provisioning model). Dividing into several subwork process and simplified master workflow for cross domain service delivery can manage the large scale and complex work into simple work and flow. Access network service delivery can be divided into several main jobs: service order classification, outside plant management, inside plant management, activation, facility service confirmation and send result to billing system. The nested hierarchical structure can balance the complexity and simplification. The OSS for access network service can manage the service installation at low cost and deliver the Internet services efficiently by choose and use appropriate provisioning models for each network models for the Internet service environments. If the automation of the service provisioning and the access equipment activation is possible based on the proposed idea, it completes the service requests for the Internet service installation across the domains in short time. And NSP can satisfy their customers. Moreover, NSP can save lots of expense and complete the service delivery without any physical works just by the automatic service activation of the provisioned access equipment ports on time that the customers require.

Timed workflow-based delivery of internet access over cross-domain access networks

Network Service Provider(NSP)s make much effort to provide the flexible and cost effective Operations Support system(OSS)s, so as to adapt to changing customer requirements and market opportunities rapidly. Afterward, they could provide better services at a lower cost, of reducing the time to market, of improving and customizing their relationships with customers and, ultimately, of increasing customer satisfaction and the companys profits. These objectives push NSPs into continuously improving the business processes for services. Workflow Management technology accomplishes above the demands by modeling, redesign and execution of business processes. Especially workflow time management is important to timely schedule workflow process execution, to avoid deadline violations, and to improve the workflow turn-aror.md times. We propose the timed workflow management with OSS-SDM(Service Delivery Management System) for cross domain Internet Access Service delivery to manage the service installation at low cost and to deliver the Internet services efficiently by choosing and using appropriate provisioning models over access network models in Internet service environments. With the proposed idea. NSPs can save lots of expenses and complete the service delivery without any physical works just by the automatic service activation of the provisioned access equipment ports on the time that the customers request.