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Papers by Changcheng Huang

Research paper thumbnail of Monitoring cycles for fault detection in meshed all-optical networks

Workshops on Mobile and Wireless Networking/High Performance Scientific, Engineering Computing/Network Design and Architecture/Optical Networks Control and Management/Ad Hoc and Sensor Networks/Compile and Run Time Techniques for Parallel Computing ICPP 2004

Research paper thumbnail of A Novel Path Selection and Recovery Mechanism for MANETs P2P File Sharing Applications

2007 IEEE Wireless Communications and Networking Conference, 2007

Research paper thumbnail of Intelligent Weather Aware Scheme for Satellite Systems

Rain, snow, gaseous, cloud, fog, scintillation and other atmospheric properties can have a distor... more Rain, snow, gaseous, cloud, fog, scintillation and other atmospheric properties can have a distorting effect on signal fidelity of Ku and Ka bands, thus resulting in excessive digital transmission error. This loss of signal is commonly referred to as signal attenuation. Signal attenuation impacts the QoS in wireless and satellite networks. Accurately predicting channel attenuation due to atmospheric conditions can enable mitigation planning by adaptively selecting appropriate modulation, coding, transmitted power level, transmission rate and configured frame size. The aim of this paper is to estimate different attenuations using predicted signal-weather correlated database in collaboration with ITU-R propagation models combined with interpolation methods, gateway, and ground terminal characteristics. A three dimensional relationship is proposed among these attenuations with respect to propagation angle and rainfall rate [l]-[8]. The outcome is key factor in diagnosing, adjusting and...

Research paper thumbnail of Fault detection and path performance monitoring in meshed all-optical networks

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04.

Research paper thumbnail of Most balancing algorithms for optimal packet scheduling in multi-server wireless systems

2011 IEEE Wireless Communications and Networking Conference, 2011

Research paper thumbnail of On capacity provisioning in datacenter networks for full bandwidth communication

2013 IEEE 14th International Conference on High Performance Switching and Routing (HPSR), 2013

Research paper thumbnail of Flow availability analysis in two-layer networks with dedicated path protection at the upper layer

2012 IEEE International Conference on Communications (ICC), 2012

Research paper thumbnail of Adaptive sampling methods for network performance metrics measurement and evaluation in MPLS-based IP networks

CCECE 2003 - Canadian Conference on Electrical and Computer Engineering. Toward a Caring and Humane Technology (Cat. No.03CH37436)

Research paper thumbnail of IMS network deployment cost optimization based on flow-based traffic model

2010 IEEE Network Operations and Management Symposium - NOMS 2010, 2010

Research paper thumbnail of Penalty Function Method for Peer Selection over Wireless Mesh Network

2010 IEEE 72nd Vehicular Technology Conference - Fall, 2010

Research paper thumbnail of Simulated Annealing Based Bandwidth Reservation for QoS Routing

2006 IEEE International Conference on Communications, 2006

Research paper thumbnail of Lightweight protocol suite for wireless sensor networks: design and evaluation

2007 International Symposium on Communications and Information Technologies, 2007

Research paper thumbnail of Optimization of all-optical network testbed regarding NRZ and RZ modulation

The non-return-to-zero (NRZ) and return-to-zero (RZ) formats are two well-known cost-effective ca... more The non-return-to-zero (NRZ) and return-to-zero (RZ) formats are two well-known cost-effective candidates for the optimum modulation in all-optical networks (AON). This paper focuses on the effects of novel active/passive optical devices, such as photonic switches and erbium doped fibre amplifiers (EDFA), and the effects of modulation formats on the overall system performance, under metropolitan environments without dispersion control/compensation. The overall system performance of an AON metropolitan WDM testbed is investigated by numerical simulation while using NRZ and RZ modulation respectively. Q factor (equivalent to bit error ratio) is selected as the criterion for the comparison. The testbed is based on commercially available photonic switches, which support dynamic wavelength switching. The testbed operates at 10 Gbit/s per channel. The effects of transmitter optical powers and the extinction ratios are numerically analyzed. Based on these results the system parameters, suc...

Research paper thumbnail of Applying control theoretic approach to mitigate SIP overload

Telecommunication Systems, 2013

Research paper thumbnail of A Scalable Path Protection Mechanism for Guaranteed Network Reliability Under Multiple Failures

IEEE Transactions on Reliability, 2007

Research paper thumbnail of Modeling and simulation of self-similar variable bit rate compressed video

ACM SIGCOMM Computer Communication Review, 1995

Variable bit rate (VBR) compressed video is expected to become one of the major loading factors i... more Variable bit rate (VBR) compressed video is expected to become one of the major loading factors in high-speed packet networks such as ATM-based B-ISDN. However, recent measurements based on long empirical traces (complete movies) revealed that VBR video traffic possesses self-similar (or fractal ) characteristics, meaning that the dependence in the traffic stream lasts much longer than traditional models can capture.In this paper, we present a unified approach which, in addition to accurately modeling the marginal distribution of empirical video records, also models directly both the short and the long-term empirical autocorrelation structures. We also present simulation results using synthetic data and compare with results based on empirical video traces.Furthermore, we extend the application of efficient estimation techniques based on importance sampling that we had used before only for simple fractal processes. We use importance sampling techniques to efficiently estimate low pro...

Research paper thumbnail of Optimizing the monitoring path design for independent dual failures

2012 IEEE International Conference on Communications (ICC), 2012

Research paper thumbnail of Reverse notification tree for data networks

Research paper thumbnail of Energy-aware node and link reconfiguration for virtualized network environments

Computer Networks, 2015

Energy consumption in information and communications technology (ICT) accounts for a large portio... more Energy consumption in information and communications technology (ICT) accounts for a large portion of the total energy consumed in industrial countries, which is rapidly increasing. Virtualized network environments (VNEs) have recently emerged as a solution in this technology to address the challenges of future Internet. VNEs also play a fundamental role toward virtualizing data centers. Consequently, it is essential to develop novel techniques for reducing the energy consumption of VNEs. In this paper, we discuss multiple energy-saving solutions that locally optimize the node and link energy consumption of VNEs during the off-peak period by reconfiguring the mapping of already allocated virtual nodes and links. The proposed reconfigurations enable the providers to adjust the level of the reconfiguration and accordingly control possible traffic disruptions. An integer linear program (ILP) is formulated for each solution. Because the defined ILPs are N P-hard, a novel heuristic algorithm is also proposed. The proposed energy-saving methods are evaluated over random VNE scenarios. The results confirm that the solutions save notable amounts of energy in physical nodes and links during the off-peak period.

Research paper thumbnail of <title>Traffic classification and service in all-optical networks</title>

Optical Networking II, 2002

All-Optical Networks require end-to-end lightpaths to be established for traffic to flow, given t... more All-Optical Networks require end-to-end lightpaths to be established for traffic to flow, given that there are no wavelength converters present in the network. It is shown that as the lightpaths traverse more hops, the blocking probability increases. This is causes the Fairness Problem. We introduce the Traffic Classification and Service Method (ClaServ), which optimizes the Fairness Problem, as well as reduce the traffic blocking probability when the networks require lower blocking probability. The combination of the Waveband Access Range (WAR) and the Waveband Reservation (WRsv) methods changes the traffic's distribution among the wavebands on each link of the path to control the degree of the interference among the classified traffic. Under certain traffic load, by setting the range of accessible wavebands and reserved wavebands for classified traffic, the network can achieve both the fairness and low blocking probability for all type of traffic. The simulation results show that for a 4x4 Mesh-Torus network the ClaServ method can greatly reduce the blocking probability for longer lightpaths by a factor of 100. It is also described how the ClaServ method can easily be implemented into a distributed signaling protocol.

Research paper thumbnail of Monitoring cycles for fault detection in meshed all-optical networks

Workshops on Mobile and Wireless Networking/High Performance Scientific, Engineering Computing/Network Design and Architecture/Optical Networks Control and Management/Ad Hoc and Sensor Networks/Compile and Run Time Techniques for Parallel Computing ICPP 2004

Research paper thumbnail of A Novel Path Selection and Recovery Mechanism for MANETs P2P File Sharing Applications

2007 IEEE Wireless Communications and Networking Conference, 2007

Research paper thumbnail of Intelligent Weather Aware Scheme for Satellite Systems

Rain, snow, gaseous, cloud, fog, scintillation and other atmospheric properties can have a distor... more Rain, snow, gaseous, cloud, fog, scintillation and other atmospheric properties can have a distorting effect on signal fidelity of Ku and Ka bands, thus resulting in excessive digital transmission error. This loss of signal is commonly referred to as signal attenuation. Signal attenuation impacts the QoS in wireless and satellite networks. Accurately predicting channel attenuation due to atmospheric conditions can enable mitigation planning by adaptively selecting appropriate modulation, coding, transmitted power level, transmission rate and configured frame size. The aim of this paper is to estimate different attenuations using predicted signal-weather correlated database in collaboration with ITU-R propagation models combined with interpolation methods, gateway, and ground terminal characteristics. A three dimensional relationship is proposed among these attenuations with respect to propagation angle and rainfall rate [l]-[8]. The outcome is key factor in diagnosing, adjusting and...

Research paper thumbnail of Fault detection and path performance monitoring in meshed all-optical networks

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04.

Research paper thumbnail of Most balancing algorithms for optimal packet scheduling in multi-server wireless systems

2011 IEEE Wireless Communications and Networking Conference, 2011

Research paper thumbnail of On capacity provisioning in datacenter networks for full bandwidth communication

2013 IEEE 14th International Conference on High Performance Switching and Routing (HPSR), 2013

Research paper thumbnail of Flow availability analysis in two-layer networks with dedicated path protection at the upper layer

2012 IEEE International Conference on Communications (ICC), 2012

Research paper thumbnail of Adaptive sampling methods for network performance metrics measurement and evaluation in MPLS-based IP networks

CCECE 2003 - Canadian Conference on Electrical and Computer Engineering. Toward a Caring and Humane Technology (Cat. No.03CH37436)

Research paper thumbnail of IMS network deployment cost optimization based on flow-based traffic model

2010 IEEE Network Operations and Management Symposium - NOMS 2010, 2010

Research paper thumbnail of Penalty Function Method for Peer Selection over Wireless Mesh Network

2010 IEEE 72nd Vehicular Technology Conference - Fall, 2010

Research paper thumbnail of Simulated Annealing Based Bandwidth Reservation for QoS Routing

2006 IEEE International Conference on Communications, 2006

Research paper thumbnail of Lightweight protocol suite for wireless sensor networks: design and evaluation

2007 International Symposium on Communications and Information Technologies, 2007

Research paper thumbnail of Optimization of all-optical network testbed regarding NRZ and RZ modulation

The non-return-to-zero (NRZ) and return-to-zero (RZ) formats are two well-known cost-effective ca... more The non-return-to-zero (NRZ) and return-to-zero (RZ) formats are two well-known cost-effective candidates for the optimum modulation in all-optical networks (AON). This paper focuses on the effects of novel active/passive optical devices, such as photonic switches and erbium doped fibre amplifiers (EDFA), and the effects of modulation formats on the overall system performance, under metropolitan environments without dispersion control/compensation. The overall system performance of an AON metropolitan WDM testbed is investigated by numerical simulation while using NRZ and RZ modulation respectively. Q factor (equivalent to bit error ratio) is selected as the criterion for the comparison. The testbed is based on commercially available photonic switches, which support dynamic wavelength switching. The testbed operates at 10 Gbit/s per channel. The effects of transmitter optical powers and the extinction ratios are numerically analyzed. Based on these results the system parameters, suc...

Research paper thumbnail of Applying control theoretic approach to mitigate SIP overload

Telecommunication Systems, 2013

Research paper thumbnail of A Scalable Path Protection Mechanism for Guaranteed Network Reliability Under Multiple Failures

IEEE Transactions on Reliability, 2007

Research paper thumbnail of Modeling and simulation of self-similar variable bit rate compressed video

ACM SIGCOMM Computer Communication Review, 1995

Variable bit rate (VBR) compressed video is expected to become one of the major loading factors i... more Variable bit rate (VBR) compressed video is expected to become one of the major loading factors in high-speed packet networks such as ATM-based B-ISDN. However, recent measurements based on long empirical traces (complete movies) revealed that VBR video traffic possesses self-similar (or fractal ) characteristics, meaning that the dependence in the traffic stream lasts much longer than traditional models can capture.In this paper, we present a unified approach which, in addition to accurately modeling the marginal distribution of empirical video records, also models directly both the short and the long-term empirical autocorrelation structures. We also present simulation results using synthetic data and compare with results based on empirical video traces.Furthermore, we extend the application of efficient estimation techniques based on importance sampling that we had used before only for simple fractal processes. We use importance sampling techniques to efficiently estimate low pro...

Research paper thumbnail of Optimizing the monitoring path design for independent dual failures

2012 IEEE International Conference on Communications (ICC), 2012

Research paper thumbnail of Reverse notification tree for data networks

Research paper thumbnail of Energy-aware node and link reconfiguration for virtualized network environments

Computer Networks, 2015

Energy consumption in information and communications technology (ICT) accounts for a large portio... more Energy consumption in information and communications technology (ICT) accounts for a large portion of the total energy consumed in industrial countries, which is rapidly increasing. Virtualized network environments (VNEs) have recently emerged as a solution in this technology to address the challenges of future Internet. VNEs also play a fundamental role toward virtualizing data centers. Consequently, it is essential to develop novel techniques for reducing the energy consumption of VNEs. In this paper, we discuss multiple energy-saving solutions that locally optimize the node and link energy consumption of VNEs during the off-peak period by reconfiguring the mapping of already allocated virtual nodes and links. The proposed reconfigurations enable the providers to adjust the level of the reconfiguration and accordingly control possible traffic disruptions. An integer linear program (ILP) is formulated for each solution. Because the defined ILPs are N P-hard, a novel heuristic algorithm is also proposed. The proposed energy-saving methods are evaluated over random VNE scenarios. The results confirm that the solutions save notable amounts of energy in physical nodes and links during the off-peak period.

Research paper thumbnail of <title>Traffic classification and service in all-optical networks</title>

Optical Networking II, 2002

All-Optical Networks require end-to-end lightpaths to be established for traffic to flow, given t... more All-Optical Networks require end-to-end lightpaths to be established for traffic to flow, given that there are no wavelength converters present in the network. It is shown that as the lightpaths traverse more hops, the blocking probability increases. This is causes the Fairness Problem. We introduce the Traffic Classification and Service Method (ClaServ), which optimizes the Fairness Problem, as well as reduce the traffic blocking probability when the networks require lower blocking probability. The combination of the Waveband Access Range (WAR) and the Waveband Reservation (WRsv) methods changes the traffic's distribution among the wavebands on each link of the path to control the degree of the interference among the classified traffic. Under certain traffic load, by setting the range of accessible wavebands and reserved wavebands for classified traffic, the network can achieve both the fairness and low blocking probability for all type of traffic. The simulation results show that for a 4x4 Mesh-Torus network the ClaServ method can greatly reduce the blocking probability for longer lightpaths by a factor of 100. It is also described how the ClaServ method can easily be implemented into a distributed signaling protocol.