Wang-Cheol Song

article

Road-Aware Estimation Model for Path Duration in Internet of Vehicles (IoV)

Muhammad Tahir Abbas, Afaq Muhammad, Wang-Cheol Song

Wireless Personal Communications > 2019 > 109 > 2 > 715-738

In Internet of Vehicles (IoV), numerous routing metrics have been used to assess the performance of routing protocols such as, packet delivery ratio, throughput, end-to-end delay and path duration. Path duration is an influential design parameter, among these routing metrics, that determines the performance of vehicular networks. For instance, in highly dynamic scenarios, it can be used to predict...

chapter

Infrastructure-assisted hybrid road-aware routing and QoS provisioning in VANETs

Muhammad Tahir Abbas, Wang-Cheol Song

2017 19th Asia-Pacific Network Operations and Management Symposium (APNOMS) > 370 - 373

2017 19th Asia-Pacific Network Operations and Management Symposium (APNOMS)

Intelligent Transportation System (ITS) have been attracting a significant attention among the researchers due to its numerous applications that will pave the path towards the faster, safer and er\joyable journeys. However, these applications require a reliable routing protocol along with a robust, secure and fast connection to infrastructure. In this paper, we propose an Infrastructure-assisted hybrid...

chapter

multiFIA Multi-dimensional future Internet architecture

Seung-Joon Seok, Afaq Muhammad, Kvungbaek Kim, Deokjai Choi, more

2017 Ninth International Conference on Ubiquitous and Future Networks (ICUFN) > 87 - 92

2017 Ninth International Conference on Ubiquitous and Future Networks (ICUFN)

Rapid growth in Internet of Things (IoT) has resulted in the need for effective management and provisioning of resources in an IoT-based system. The resource may be an entity (virtual or physical) that constitutes the IoT system, such as network elements, gateways, cloud data stores, and sensors. The dynamic and constantly changing nature of request by a typical user for resource allocation demands...

chapter

A path analysis of two-level hierarchical road. aware routing in VANETs

Muhammad Tahir Abbas, Wang Cheol Song

2017 Ninth International Conference on Ubiquitous and Future Networks (ICUFN) > 940 - 945

2017 Ninth International Conference on Ubiquitous and Future Networks (ICUFN)

In recent years, numerous design parameters have been considered to evaluate the performance of different routing protocols in VANETs. These parameters include end-to-end delay, packet delivery ratio and path duration. Path duration is one of the important design parameter for diverse environments. In this paper, we have proposed a probabilistical model for path duration estimation using highway mobility...

chapter

Policy-Based Management in Ad hoc Networks Using Geographic Routing

Farrukh Aslam Khan, Umer Zeeshan Ijaz, Kyung-Youn Kim, Min-Jae Kang, more

Lecture Notes in Computer Science > Information Networking. Advances in Data Communications and Wireless Networks > Ad Hoc Sensor Networks > 237-246

The management in mobile ad hoc networks is quite challenging as compared to management in wired networks. Several management strategies have been proposed by authors using either pro-active or reactive routing protocols. In this paper, we propose a policy-based management framework for ad hoc networks in which policy servers can efficiently communicate and service their clients using Location-Aided...

chapter

Context-Aware Routing for hovering information in Vehicular Ad-Hoc Networks

Zubair Amjad, Wang-Cheol Song, Khi-Jung Ahn

2016 18th Asia-Pacific Network Operations and Management Symposium (APNOMS) > 1 - 6

2016 18TH Asia-Pacific Network Operations and Management Symposium (APNOMS)

Road traffic information is considered vital for drivers and passengers in a VANET. Recently many approaches have been proposed for sharing the road information among the vehicles on the roads. Applications that use hovering information for road safety consider TTL and a radial distance from a center point to disseminate the information in a geographically limited area. These approaches generally...

chapter

sFlow-based resource utilization monitoring in clouds

Muhammad Afaq, Wang-Cheol Song

2016 18th Asia-Pacific Network Operations and Management Symposium (APNOMS) > 1 - 3

2016 18TH Asia-Pacific Network Operations and Management Symposium (APNOMS)

Monitoring of infrastructural resources against a huge number of virtual machines in clouds is a challenging task to system administrators. System management tools are used to collect and provide the utilization of a variety of performance counters of each virtual machine. Such dispersed views cannot reveal the actual performance behavior of virtual machines. To this purpose, a monitoring framework...

chapter

Context-aware two-level hierarchical routing for VANETs

Zubair Amjad, Wang Cheol Song, Khi Jung Ahn

2016 Eighth International Conference on Ubiquitous and Future Networks (ICUFN) > 1083 - 1088

2016 Eighth International Conference on Ubiquitous and Future Networks (ICUFN)

Being a subclass of mobile ad hoc networks (MANETs), vehicular ad hoc networks (VANETs) have received considerable attention in recent years. Existing routing protocols of MANETs do not perform well for VANETs due to many different characteristics such as, fast moving nodes and frequent disconnections in the network. We present a context-aware hierarchical routing protocol based on road connectivity...

chapter

Two-Level Hierarchical Routing Based on Road Connectivity in VANETs

Zubair Amjad, Wang-Cheol Song, Khi-Jung Ahn

2016 International Conference on Industrial Engineering, Management Science and Application (ICIMSA) > 1 - 5

2016 International Conference on Industrial Engineering, Management Science and Application (ICIMSA)

Vehicular ad hoc networks have received considerable attention in recent years. Being a subclass of mobile ad hoc networks, VANETs have some different characteristics than MANETs such as, fast moving nodes and frequent disconnections in the network. Existing routing protocols of MANETs do not perform well under these dynamic conditions in VANETs. We present a two-level hierarchical routing protocol...

chapter

Neural Networks for Optimization Problem with Nonlinear Constraints

Min-jae Kang, Ho-chan Kim, Farrukh Aslam Khan, Wang-cheol Song, more

Lecture Notes in Computer Science > Neural Information Processing > Neurodynamic and Particle Swarm Optimization > 1014-1021

Hopfield introduced the neural network for linear programming with linear constraints. In this paper, Hopfield neural network has been generalized to solve the optimization problems including nonlinear constraints. The proposed neural network can solve a nonlinear cost function with nonlinear constraints. Also, methods have been discussed to reconcile optimization problems with neural networks and...

chapter

An Implementation of P2P System for Sharing Sensory Information

Seung-Joon Seok, Nam-Gon Kim, Deokjai Choi, Wang-Cheol Song

Lecture Notes in Computer Science > Management Enabling the Future Internet for Changing Business and New Computing Services > Sensor Network and P2P Management > 191-200

So far, numerous wireless sensor networks have been deployed indepedently and restrictly used for specific services as isolated islands. Recently it is considered to exploit the sensor networks already deployed by others or open its sensor networks for sharing the sensor data. In this paper, we introduce our empirical development of a P2P system for sensor information. We design a gateway node which...

chapter

Performance Evaluation of Parallel Systems Employing Roll-Forward Checkpoint Schemes

Gyung-Leen Park, Hee Yong Youn, Junghoon Lee, Chul Soo Kim, more

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > Workshop on Parallel and Distributed Computing (PDC 2006) > 185-191

High performance and reliability are the main goals of parallel and distributed computing systems. To increase the performance and reliability of the systems, various checkpoint schemes have been proposed in the literature for decades. However, the lack of general analytical models has been an obstacle to compare the performance of systems employing different checkpoint schemes. This paper develops...

chapter

An Efficient Bandwidth Reclaim Scheme for the Integrated Transmission of Real-Time and Non-Real-Time Messages on the WLAN

Junghoon Lee, In-Hye Shin, Gyung-Leen Park, Wang-Cheol Song, more

Lecture Notes in Computer Science > Computational Science – ICCS 2007 > 925-932

This paper proposes and analyzes bandwidth reclaim scheme for IEEE 802.11 WLAN, which may suffer from severe bandwidth waste resulting from not only the variation of transmission rate and message length but also the overallocation to the real-time traffic in compensating for the delay due to the intervention of non-real-time messages. Built on top of the weighted round robin scheduling policy, we...

chapter

Cross Layer Based PBNM for Mobile Ad Hoc Networks with Vector Information in XML

Shafqat-ur Rehman, Wang-Cheol Song, Gyung-Leen Park, Junghoon Lee

Lecture Notes in Computer Science > Managing Next Generation Networks and Services > Session 4: Sensor and Ad-hoc Networks > 165-174

Management of mobile ad hoc networks poses new challenges due to the dynamic nature of the networks and the environment in which they operate. Management of these networks requires distributed systems which can adapt to the changing network conditions. An interesting approach to network management is Policy based Network Management (PBNM) which configures and controls the network as a whole. Lately,...

chapter

Geocasting in Wireless Ad Hoc Networks with Guaranteed Delivery

Farrukh Aslam Khan, Khi-Jung Ahn, Wang-Cheol Song

Lecture Notes in Computer Science > Information Networking. Towards Ubiquitous Networking and Services > Part I > 213-222

In this paper, we address the problem of delivering the geocast packets to all nodes inside the geocast region in an ad hoc network, which are not directly connected to one another. We propose a geocast routing protocol that guarantees the delivery of geocast packets to all nodes inside a geocast region. In order to guarantee the delivery of packets to all nodes, we make use of the nodes outside the...

chapter

Differences in Input Space Stability Between Using the Inverted Output of Amplifier and Negative Conductance for Inhibitory Synapse

Min-Jae Kang, Ho-Chan Kim, Wang-Cheol Song, Junghoon Lee, more

Lecture Notes in Computer Science > Advances in Neural Networks – ISNN 2007 > Stability Analysis of Neural Networks > 1015-1024

In this paper, the difference between using the inverted neuron output and negative resistor for expressing inhibitory synapse is studied. We analyzed that the total conductance seen at the neuron input is different in these two methods. And this total conductance has been proved to effect on the system stability in this paper. Also, we proposed the method how to stabilize the input space and improve...

chapter

FPGA Implementation of a Neural Network for Character Recognition

Farrukh A. Khan, Momin Uppal, Wang-Cheol Song, Min-Jae Kang, more

Lecture Notes in Computer Science > Advances in Neural Networks - ISNN 2006 > Hardware Implementation > 1357-1365

Neural Networks are usually implemented in software on sequential machines but when implemented in hardware, they are extremely fast due to the massive parallelism inherent in the hardware devices. Implementation of Neural Networks in Programmable Logic Devices such as FPGAs (Field Programmable Gate Arrays) gives us more flexibility since these devices are reconfigurable and their design can be altered...

chapter

Convergence Analysis of Continuous-Time Neural Networks

Min-Jae Kang, Ho-Chan Kim, Farrukh A. Khan, Wang-Cheol Song, more

Lecture Notes in Computer Science > Advances in Neural Networks - ISNN 2006 > Theoretical Analysis > 100-108

The energy function of continuous-time neural network has been analyzed for testing the existence of stationary points and the global convergence of network. The energy function always has only one stationary point which is a saddle point in the unconstrained space when the total conductance of neuron’s input is zero (G _i = 0). However, the stationary points exist...

chapter

A New Location-Aware Hierarchical Routing Protocol for MANETs

Farrukh Aslam Khan, Khi-Jung Ahn, Wang-Cheol Song

Lecture Notes in Computer Science > Ubiquitous Intelligence and Computing > Wireless and Mobile Ad hoc Networks > 519-533

In this paper, a new hierarchical routing protocol called Location-aware Grid-based Hierarchical Routing (LGHR) is proposed for mobile ad hoc networks where the network is partitioned into non-overlapping zones and each zone is then further divided into smaller grids. Although, the protocol is a location-aware routing protocol, the routing is performed similar to link state routing i.e., the neighbor...

chapter

Experiences in End-to-End Performance Monitoring on KOREN

Wang-Cheol Song, Deok-Jae Choi

Lecture Notes in Computer Science > Management of Convergence Networks and Services > Session 8: Management Experience > 383-392

As the network technology has been developed, the Next Generation Internet (NGI) such as Internet2, KOREN, KREONET2 and etc has been deployed to support bandwidth of Giga bps. And, various applications such as the video conference, the tele-surgery and etc that require high bandwidth has been developed and operating on the NGI, especially KOREN and KREONET2 in Korea. When the applications are operating...

INFONA - science communication portal

Search results for: Wang-Cheol Song

Road-Aware Estimation Model for Path Duration in Internet of Vehicles (IoV)

Infrastructure-assisted hybrid road-aware routing and QoS provisioning in VANETs

multiFIA Multi-dimensional future Internet architecture

A path analysis of two-level hierarchical road. aware routing in VANETs

Policy-Based Management in Ad hoc Networks Using Geographic Routing

Context-Aware Routing for hovering information in Vehicular Ad-Hoc Networks

sFlow-based resource utilization monitoring in clouds

Context-aware two-level hierarchical routing for VANETs

Two-Level Hierarchical Routing Based on Road Connectivity in VANETs

Neural Networks for Optimization Problem with Nonlinear Constraints

An Implementation of P2P System for Sharing Sensory Information

Performance Evaluation of Parallel Systems Employing Roll-Forward Checkpoint Schemes

An Efficient Bandwidth Reclaim Scheme for the Integrated Transmission of Real-Time and Non-Real-Time Messages on the WLAN

Cross Layer Based PBNM for Mobile Ad Hoc Networks with Vector Information in XML

Geocasting in Wireless Ad Hoc Networks with Guaranteed Delivery

Differences in Input Space Stability Between Using the Inverted Output of Amplifier and Negative Conductance for Inhibitory Synapse

FPGA Implementation of a Neural Network for Character Recognition

Convergence Analysis of Continuous-Time Neural Networks

A New Location-Aware Hierarchical Routing Protocol for MANETs

Experiences in End-to-End Performance Monitoring on KOREN

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