The Experts below are selected from a list of 87 Experts worldwide ranked by ideXlab platform

Shaima Qureshi - One of the best experts on this subject based on the ideXlab platform.

  • performance analysis of Payload Header suppression phs for transmission of voip over mpls based ipv4 ipv6 network
    International Conference on Ubiquitous Information Management and Communication, 2018
    Co-Authors: Mohammad Ahsan Chishti, Shaima Qureshi
    Abstract:

    Internet has been growing tremendously since its beginning and day by day more and more computers are getting added to it. This sets a tremendous pressure on the available bandwidth of links connecting the nodes. With the evolution of Internet Protocol version 6, the Header size has almost doubled which again would have considerable effect on bandwidth. Payload Header Suppression is a bandwidth saving technology which removes the redundant packet overhead. Together with MPLS, PHS can be used to optimize the network performance by reducing the traffic congestion. This paper performs a comparison of utilizing PHS in MPLS network over IPv6 and IPv4 networks by sending real time traffic of VoIP. The analysis clearly proved that PHS has a considerable effect in reduction of packet delay, background delay, packet loss and increase in throughput. Also, the performance of IPv6 was better than IPv4 while utilizing suppression mechanisms over MPLS.

  • IMCOM - Performance Analysis of Payload Header Suppression (PHS) for Transmission of VoIP over MPLS based IPv4/IPv6 Network
    Proceedings of the 12th International Conference on Ubiquitous Information Management and Communication - IMCOM '18, 2018
    Co-Authors: Mohammad Ahsan Chishti, Shaima Qureshi
    Abstract:

    Internet has been growing tremendously since its beginning and day by day more and more computers are getting added to it. This sets a tremendous pressure on the available bandwidth of links connecting the nodes. With the evolution of Internet Protocol version 6, the Header size has almost doubled which again would have considerable effect on bandwidth. Payload Header Suppression is a bandwidth saving technology which removes the redundant packet overhead. Together with MPLS, PHS can be used to optimize the network performance by reducing the traffic congestion. This paper performs a comparison of utilizing PHS in MPLS network over IPv6 and IPv4 networks by sending real time traffic of VoIP. The analysis clearly proved that PHS has a considerable effect in reduction of packet delay, background delay, packet loss and increase in throughput. Also, the performance of IPv6 was better than IPv4 while utilizing suppression mechanisms over MPLS.

Tejmani Sinam - One of the best experts on this subject based on the ideXlab platform.

  • A technique for classification of VoIP flows in UDP media streams using VoIP signalling traffic
    2014 IEEE International Advance Computing Conference (IACC), 2014
    Co-Authors: Tejmani Sinam, Irengbam Tilokchan Singh, Pradeep Lamabam, Ngasham Nandarani Devi, Sukumar Nandi
    Abstract:

    VoIP applications are becoming popular these days. A lot of Internet traffic are being generated by them. Detection of VoIP traffic is becoming important because of QoS issues and security concerns. A VoIP client typically opens a number of network connection between VoIP client and VoIP client, VoIP client and VoIP server. In the case of peer to peer VoIP applications like Skype network, connections may be between client to client, client to Super Node, client to login server, Super Node to Super Node. Typically, VoIP media traffic are carried by UDP unless firewalls blocks UDP, in which case media and signalling traffic are carried by TCP. Many VoIP applications uses RTP to carry media traffic. Notable examples includes GTalk, Google+ Hangouts, Asterisk based VoIP and Apple's FaceTime. On the other hand, Skype uses a proprietary protocol based on P2P architecture. It uses encryption for end to end communications and adopts obfuscation and anti reverse engineering techniques to prevent reverse engineering of the Skype protocol. This makes the detection of Skype flows a challenging task. Although Skype encrypts all communications, still a portion of Skype Payload Header known as Start of Message (SoM) is left unecrypted. In this paper, we develop a method for detection of VoIP flows in UDP media streams. Our detection method relies on signalling traffic generated by VoIP applications and heuristics based on the information contained in Skype SoM and RTP/RTCP Headers.

  • IEEE ANTS - An efficient technique for detecting Skype flows in UDP media streams
    2013 IEEE International Conference on Advanced Networks and Telecommunications Systems (ANTS), 2013
    Co-Authors: Tejmani Sinam, Irengbam Tilokchan Singh, Pradeep Lamabam, Nandarani Ngasham
    Abstract:

    As the use and popularity of VoIP applications grows, more and more Internet traffic are being generated by them. Many VoIP applications uses RTP to carry media traffic. Notable examples includes Gtalk, Google+ Hangouts, Asterisk based VoIP and Apple's FaceTime. On the other hand, Skype uses a proprietary protocol based on P2P architecture. It uses encryption for end to end communications and adopts obfuscation and anti reverse engineering techniques to prevent reverse engineering of the Skype protocol. This makes the detection of Skype flows a challenging task. Although Skype encrypts all communications, still a portion of Skype Payload Header known as Start of Message (SoM) is left unencrypted. In this paper, we develop an efficient technique for detection of Skype flows in UDP media streams. Our detection techniques relies on heuristics based on the information contained in Skype SoM and RTP Headers.

  • An efficient technique for detecting Skype flows in UDP media streams
    2013 IEEE International Conference on Advanced Networks and Telecommunications Systems (ANTS), 2013
    Co-Authors: Tejmani Sinam, Irengbam Tilokchan Singh, Pradeep Lamabam, Nandarani Ngasham
    Abstract:

    As the use and popularity of VoIP applications grows, more and more Internet traffic are being generated by them. Many VoIP applications uses RTP to carry media traffic. Notable examples includes Gtalk, Google+ Hangouts, Asterisk based VoIP and Apple's FaceTime. On the other hand, Skype uses a proprietary protocol based on P2P architecture. It uses encryption for end to end communications and adopts obfuscation and anti reverse engineering techniques to prevent reverse engineering of the Skype protocol. This makes the detection of Skype flows a challenging task. Although Skype encrypts all communications, still a portion of Skype Payload Header known as Start of Message (SoM) is left unencrypted. In this paper, we develop an efficient technique for detection of Skype flows in UDP media streams. Our detection techniques relies on heuristics based on the information contained in Skype SoM and RTP Headers.

Amani S. Amin - One of the best experts on this subject based on the ideXlab platform.

  • The effectiveness of transmitting voice traffic over IPv6 convergence sublayer of WiMAX mesh networks
    2010 17th International Conference on Telecommunications, 2010
    Co-Authors: Hadia M. El-hennawy, Haitham H. Gomaa, Amani S. Amin
    Abstract:

    Internet Protocol version 6 (IPv6) is a new protocol that has been defined to ultimately replace IPv4. IPv6 solves the problem imposed by the limited 32-bit address field in IPv4. However the definition of the new protocol results in longer Header size, which affects services that used to be transmitted over IP especially real-time services such as voice. As IP network is no longer confined to the wired domain and is being extended over wireless networks. The IEEE 802.16-based WiMAX (World Wide Interoperability of Microwave Access) promises to be one of the wireless access technologies capable of supporting very high bandwidth applications. In this paper, using the simulation results obtained by NS2, we demonstrate the effectiveness of transmitting voice traffic over IPv6 convergence sublayer of WiMAX mesh network and compare it with the quality in case of applying current Header compression techniques, Robust Header Compression (ROHC) and Payload Header Suppression (PHS), and a new proposed modification to the PHS technique. We prove that using our proposed technique we improve the current PHS technique and approach the same performance of ROHC technique.

  • ICT - The effectiveness of transmitting voice traffic over IPv6 convergence sublayer of WiMAX mesh networks
    2010 17th International Conference on Telecommunications, 2010
    Co-Authors: Hadia M. El-hennawy, Haitham H. Gomaa, Amani S. Amin
    Abstract:

    Internet Protocol version 6 (IPv6) is a new protocol that has been defined to ultimately replace IPv4. IPv6 solves the problem imposed by the limited 32-bit address field in IPv4. However the definition of the new protocol results in longer Header size, which affects services that used to be transmitted over IP especially real-time services such as voice. As IP network is no longer confined to the wired domain and is being extended over wireless networks. The IEEE 802.16-based WiMAX (World Wide Interoperability of Microwave Access) promises to be one of the wireless access technologies capable of supporting very high bandwidth applications. In this paper, using the simulation results obtained by NS2, we demonstrate the effectiveness of transmitting voice traffic over IPv6 convergence sublayer of WiMAX mesh network and compare it with the quality in case of applying current Header compression techniques, Robust Header Compression (ROHC) and Payload Header Suppression (PHS), and a new proposed modification to the PHS technique. We prove that using our proposed technique we improve the current PHS technique and approach the same performance of ROHC technique.

T. Miyazaki - One of the best experts on this subject based on the ideXlab platform.

  • A multihoming application flow network using "A-BOX": a fast packet processing node featuring direct traffic monitoring
    2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577), 2004
    Co-Authors: M. Hashimoto, T. Murooka, T. Miyazaki
    Abstract:

    This paper proposes a novel IP multihoming scheme in which fast packet processing nodes switch and distribute the traffic on an application flow basis. The newly developed node, called A-BOX, classifies each incoming packet up to the layer 4(L4) or L7(Payload) Header, edits it as necessary, and forwards it to an outgoing port according to the Header's entry. The NAT-like sandwiched path formed between A-BOXs acts like one path defined for an application flow, and so suits applications that have QoS(quality of service) requirements. A-BOX realizes wire rate forwarding by applying hardware techniques including FPGAs. A-BOX can measure the traffic on a real time basis for each flow and distribute the flow to achieve the application's requirements. The software interface of A-BOX means that the network can be transparently controlled for each application flow. We clarify the feasibility of A-BOX's basic methods, which include network condition monitoring via individual flow with huge background traffic, switching a specified flow in the multihoming condition, and traffic sharing/bandwidth aggregation.

  • ICC - A multihoming application flow network using "A-BOX": a fast packet processing node featuring direct traffic monitoring
    2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577), 2004
    Co-Authors: M. Hashimoto, T. Murooka, T. Miyazaki
    Abstract:

    This paper proposes a novel IP multihoming scheme in which fast packet processing nodes switch and distribute the traffic on an application flow basis. The newly developed node, called A-BOX, classifies each incoming packet up to the layer 4(L4) or L7(Payload) Header, edits it as necessary, and forwards it to an outgoing port according to the Header's entry. The NAT-like sandwiched path formed between A-BOXs acts like one path defined for an application flow, and so suits applications that have QoS(quality of service) requirements. A-BOX realizes wire rate forwarding by applying hardware techniques including FPGAs. A-BOX can measure the traffic on a real time basis for each flow and distribute the flow to achieve the application's requirements. The software interface of A-BOX means that the network can be transparently controlled for each application flow. We clarify the feasibility of A-BOX's basic methods, which include network condition monitoring via individual flow with huge background traffic, switching a specified flow in the multihoming condition, and traffic sharing/bandwidth aggregation.

Nandarani Ngasham - One of the best experts on this subject based on the ideXlab platform.

  • IEEE ANTS - An efficient technique for detecting Skype flows in UDP media streams
    2013 IEEE International Conference on Advanced Networks and Telecommunications Systems (ANTS), 2013
    Co-Authors: Tejmani Sinam, Irengbam Tilokchan Singh, Pradeep Lamabam, Nandarani Ngasham
    Abstract:

    As the use and popularity of VoIP applications grows, more and more Internet traffic are being generated by them. Many VoIP applications uses RTP to carry media traffic. Notable examples includes Gtalk, Google+ Hangouts, Asterisk based VoIP and Apple's FaceTime. On the other hand, Skype uses a proprietary protocol based on P2P architecture. It uses encryption for end to end communications and adopts obfuscation and anti reverse engineering techniques to prevent reverse engineering of the Skype protocol. This makes the detection of Skype flows a challenging task. Although Skype encrypts all communications, still a portion of Skype Payload Header known as Start of Message (SoM) is left unencrypted. In this paper, we develop an efficient technique for detection of Skype flows in UDP media streams. Our detection techniques relies on heuristics based on the information contained in Skype SoM and RTP Headers.

  • An efficient technique for detecting Skype flows in UDP media streams
    2013 IEEE International Conference on Advanced Networks and Telecommunications Systems (ANTS), 2013
    Co-Authors: Tejmani Sinam, Irengbam Tilokchan Singh, Pradeep Lamabam, Nandarani Ngasham
    Abstract:

    As the use and popularity of VoIP applications grows, more and more Internet traffic are being generated by them. Many VoIP applications uses RTP to carry media traffic. Notable examples includes Gtalk, Google+ Hangouts, Asterisk based VoIP and Apple's FaceTime. On the other hand, Skype uses a proprietary protocol based on P2P architecture. It uses encryption for end to end communications and adopts obfuscation and anti reverse engineering techniques to prevent reverse engineering of the Skype protocol. This makes the detection of Skype flows a challenging task. Although Skype encrypts all communications, still a portion of Skype Payload Header known as Start of Message (SoM) is left unencrypted. In this paper, we develop an efficient technique for detection of Skype flows in UDP media streams. Our detection techniques relies on heuristics based on the information contained in Skype SoM and RTP Headers.