The Experts below are selected from a list of 1143 Experts worldwide ranked by ideXlab platform
Mounir Arioua - One of the best experts on this subject based on the ideXlab platform.
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A new Linux based TCP congestion control mechanism for long distance high bandwidth sustainable smart cities
Sustainable Cities and Society, 2018Co-Authors: Ahmad Mudassar, Ngadi Md Asri, Anwar Usman, Kashif Amjad, Ibrahim Ghafir, Mounir AriouaAbstract:People, systems, and things in the cities generate large amount of data which is considered to be the most scalable asset of any smart city. Linux users are rapidly increased in last few years, and many large multinational organizations are deploying long distance high bandwidth (LDHB) cloud networks for centralizing the data from various smart cities on a central location. TCP is responsible for reliable communication of data in these cloud networks. For reliability communication among various smart cities, a number of TCP congestion control mechanisms have been developed in the past. TCP Compound, TCP Fusion, and TCP CUBIC are the default TCP congestion control mechanisms for Microsoft Windows, Sun Solaris, and Linux operating systems respectively. The response function of TCP CUBIC is higher than the response function of Standard TCP, which is a trademark congestion control mechanism. As a result, TCP CUBIC does not behave friendly with Standard TCP in LDHB cloud networks. The Congestion Window (cwnd) reduction and growth of TCP CUBIC is very aggressive, which causes high packet loss rate and unfair share of available link bandwidth among competing flows from various smart cities. The aim of this research is to design a new TCP congestion control mechanism for Linux operating system to achieve maximum performance in LDHB cloud networks being used by smart cities. In this paper, congestion control module for slow start (CCM-SS) is designed by increasing the lower boundary limit of cwnd size in slow start phase of communication. Congestion control module for loss event (CCM-LE) is designed by increasing the cwnd reduction rate at each packet loss event and finally Advance Response Function for TCP CUBIC (ARFC) is proposed to design a new congestion control mechanism for Linux operating system. NS-2 is used to compare the performance of TCP CUBIC* with TCP CUBIC in short distance high bandwidth (SDHB) and long distance high bandwidth (LDHB) cloud networks. Results show that TCP CUBIC* has outperformed in LDHB networks, at least by a factor of 18% as compared to TCP CUBIC.
Ahmad Mudassar - One of the best experts on this subject based on the ideXlab platform.
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A new Linux based TCP congestion control mechanism for long distance high bandwidth sustainable smart cities
Sustainable Cities and Society, 2018Co-Authors: Ahmad Mudassar, Ngadi Md Asri, Anwar Usman, Kashif Amjad, Ibrahim Ghafir, Mounir AriouaAbstract:People, systems, and things in the cities generate large amount of data which is considered to be the most scalable asset of any smart city. Linux users are rapidly increased in last few years, and many large multinational organizations are deploying long distance high bandwidth (LDHB) cloud networks for centralizing the data from various smart cities on a central location. TCP is responsible for reliable communication of data in these cloud networks. For reliability communication among various smart cities, a number of TCP congestion control mechanisms have been developed in the past. TCP Compound, TCP Fusion, and TCP CUBIC are the default TCP congestion control mechanisms for Microsoft Windows, Sun Solaris, and Linux operating systems respectively. The response function of TCP CUBIC is higher than the response function of Standard TCP, which is a trademark congestion control mechanism. As a result, TCP CUBIC does not behave friendly with Standard TCP in LDHB cloud networks. The Congestion Window (cwnd) reduction and growth of TCP CUBIC is very aggressive, which causes high packet loss rate and unfair share of available link bandwidth among competing flows from various smart cities. The aim of this research is to design a new TCP congestion control mechanism for Linux operating system to achieve maximum performance in LDHB cloud networks being used by smart cities. In this paper, congestion control module for slow start (CCM-SS) is designed by increasing the lower boundary limit of cwnd size in slow start phase of communication. Congestion control module for loss event (CCM-LE) is designed by increasing the cwnd reduction rate at each packet loss event and finally Advance Response Function for TCP CUBIC (ARFC) is proposed to design a new congestion control mechanism for Linux operating system. NS-2 is used to compare the performance of TCP CUBIC* with TCP CUBIC in short distance high bandwidth (SDHB) and long distance high bandwidth (LDHB) cloud networks. Results show that TCP CUBIC* has outperformed in LDHB networks, at least by a factor of 18% as compared to TCP CUBIC.
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TCP CUBIC: A Transport Protocol for Improving the Performance of TCP in Long Distance High Bandwidth Cyber-Physical Systems
'Institute of Electrical and Electronics Engineers (IEEE)', 2018Co-Authors: Ahmad Mudassar, Ahmad Awais, Jabbar Sohail, Asif Muhammad, Habib, Muhammad Asif, Ahmed, Syed Hassan, Shah, Sayed ChhattanAbstract:Transmission Communication Protocol (TCP) is responsible for reliable transferring of heavy traffic of data over the Internet. Congestion control is one of the main challenges for TCP in today\u27s Internet. TCP Tahoe and TCP Reno are the oldest versions of TCP, proposed to solve the congestion issues. With the passage of time, different versions of TCPs are introduced to fulfill the network demands. TCP Compound, TCP CUBIC, and TCP Fusion are the default TCP versions in Microsoft Windows, Linux and Sun Solaris operating systems respectively. TCP CUBIC is designed for early, low bandwidth, short distance networks that are why it is facing fairness, TCP friendliness issues in today\u27s long distance high bandwidth Cyber-Physical Systems (CPS). In this paper, TCP CUBIC* is proposed to enhance the performance of TCP CUBIC in long distance, high bandwidth CPS. Thus, the aim of this research is to enhance the performance of TCP CUBIC to solve the fairness and TCP friendliness issues for high bandwidth, long distance CPS. NS-2 simulator is used in all performance evaluation tests. According to results, TCP CUBIC* shows better performance results as compared to original TCP CUBIC
Christoph Lange - One of the best experts on this subject based on the ideXlab platform.
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PBAT: A comprehensive software package for genome-wide association analysis of complex family-based studies
Human Genomics, 2005Co-Authors: Kristel Van Steen, Christoph LangeAbstract:The PBAT software package (v2.5) provides a unique set of tools for complex family-based association analysis at a genome-wide level. PBAT can handle nuclear families with missing parental genotypes, extended pedigrees with missing genotypic information, analysis of single nucleotide polymorphisms (SNPs), haplotype analysis, quantitative traits, multivariate/longitudinal data and time to onset phenotypes. The data analysis can be adjusted for covariates and gene/environment interactions. Haplotype-based features include sliding windows and the reconstruction of the haplotypes of the probands. PBAT's screening tools allow the user successfully to handle the multiple comparisons problem at a genome-wide level, even for 100,000 SNPs and more. Moreover, PBAT is computationally fast. A genome scan of 300,000 SNPs in 2,000 trios takes 4 central processing unit (CPU)-days. PBAT is available for Linux, Sun Solaris and Windows XP.
Ibrahim Ghafir - One of the best experts on this subject based on the ideXlab platform.
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A new Linux based TCP congestion control mechanism for long distance high bandwidth sustainable smart cities
Sustainable Cities and Society, 2018Co-Authors: Ahmad Mudassar, Ngadi Md Asri, Anwar Usman, Kashif Amjad, Ibrahim Ghafir, Mounir AriouaAbstract:People, systems, and things in the cities generate large amount of data which is considered to be the most scalable asset of any smart city. Linux users are rapidly increased in last few years, and many large multinational organizations are deploying long distance high bandwidth (LDHB) cloud networks for centralizing the data from various smart cities on a central location. TCP is responsible for reliable communication of data in these cloud networks. For reliability communication among various smart cities, a number of TCP congestion control mechanisms have been developed in the past. TCP Compound, TCP Fusion, and TCP CUBIC are the default TCP congestion control mechanisms for Microsoft Windows, Sun Solaris, and Linux operating systems respectively. The response function of TCP CUBIC is higher than the response function of Standard TCP, which is a trademark congestion control mechanism. As a result, TCP CUBIC does not behave friendly with Standard TCP in LDHB cloud networks. The Congestion Window (cwnd) reduction and growth of TCP CUBIC is very aggressive, which causes high packet loss rate and unfair share of available link bandwidth among competing flows from various smart cities. The aim of this research is to design a new TCP congestion control mechanism for Linux operating system to achieve maximum performance in LDHB cloud networks being used by smart cities. In this paper, congestion control module for slow start (CCM-SS) is designed by increasing the lower boundary limit of cwnd size in slow start phase of communication. Congestion control module for loss event (CCM-LE) is designed by increasing the cwnd reduction rate at each packet loss event and finally Advance Response Function for TCP CUBIC (ARFC) is proposed to design a new congestion control mechanism for Linux operating system. NS-2 is used to compare the performance of TCP CUBIC* with TCP CUBIC in short distance high bandwidth (SDHB) and long distance high bandwidth (LDHB) cloud networks. Results show that TCP CUBIC* has outperformed in LDHB networks, at least by a factor of 18% as compared to TCP CUBIC.
Ngadi Md Asri - One of the best experts on this subject based on the ideXlab platform.
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A new Linux based TCP congestion control mechanism for long distance high bandwidth sustainable smart cities
Sustainable Cities and Society, 2018Co-Authors: Ahmad Mudassar, Ngadi Md Asri, Anwar Usman, Kashif Amjad, Ibrahim Ghafir, Mounir AriouaAbstract:People, systems, and things in the cities generate large amount of data which is considered to be the most scalable asset of any smart city. Linux users are rapidly increased in last few years, and many large multinational organizations are deploying long distance high bandwidth (LDHB) cloud networks for centralizing the data from various smart cities on a central location. TCP is responsible for reliable communication of data in these cloud networks. For reliability communication among various smart cities, a number of TCP congestion control mechanisms have been developed in the past. TCP Compound, TCP Fusion, and TCP CUBIC are the default TCP congestion control mechanisms for Microsoft Windows, Sun Solaris, and Linux operating systems respectively. The response function of TCP CUBIC is higher than the response function of Standard TCP, which is a trademark congestion control mechanism. As a result, TCP CUBIC does not behave friendly with Standard TCP in LDHB cloud networks. The Congestion Window (cwnd) reduction and growth of TCP CUBIC is very aggressive, which causes high packet loss rate and unfair share of available link bandwidth among competing flows from various smart cities. The aim of this research is to design a new TCP congestion control mechanism for Linux operating system to achieve maximum performance in LDHB cloud networks being used by smart cities. In this paper, congestion control module for slow start (CCM-SS) is designed by increasing the lower boundary limit of cwnd size in slow start phase of communication. Congestion control module for loss event (CCM-LE) is designed by increasing the cwnd reduction rate at each packet loss event and finally Advance Response Function for TCP CUBIC (ARFC) is proposed to design a new congestion control mechanism for Linux operating system. NS-2 is used to compare the performance of TCP CUBIC* with TCP CUBIC in short distance high bandwidth (SDHB) and long distance high bandwidth (LDHB) cloud networks. Results show that TCP CUBIC* has outperformed in LDHB networks, at least by a factor of 18% as compared to TCP CUBIC.
