The Experts below are selected from a list of 18639 Experts worldwide ranked by ideXlab platform

Thierry Turletti - One of the best experts on this subject based on the ideXlab platform.

  • Cross-Layer Architecture for adaptive video multicast streaming over multirate wireless LANs
    IEEE Journal on Selected Areas in Communications, 2007
    Co-Authors: Jose Villalon, Pedro Cuenca, Luis Orozco-barbosa, Yongho Seok, Thierry Turletti
    Abstract:

    Multicast video streaming over multirate wireless LANs imposes strong demands on video codecs and the underlying network. It is not sufficient that only the video codec or only the underlying protocols adapt to changes in the wireless link quality. Research efforts should be applied in both and in a synchronized way. Cross Layer design is a new paradigm that addresses this challenge by optimizing communication network Architectures across traditional Layer boundaries. This paper presents cross-Layer Architecture for adaptive video multicast streaming over multirate wireless LANs where Layer-specific information is passed in both directions, top-down and bottom-up. The authors jointly consider three Layers of the protocol stack: the application, data link and physical Layers. The authors analyze the performance of the proposed Architecture and extensively evaluate it via simulations. The results show that the real-time video quality of the overall system can be greatly improved by cross-Layer signaling.

Chanik Park - One of the best experts on this subject based on the ideXlab platform.

  • a reconfigurable ftl flash translation Layer Architecture for nand flash based applications
    ACM Transactions in Embedded Computing Systems, 2008
    Co-Authors: Chanik Park, Wonmoon Cheon, Jeonguk Kang
    Abstract:

    In this article, a novel FTL (flash translation Layer) Architecture is proposed for NAND flash-based applications such as MP3 pLayers, DSCs (digital still cameras) and SSDs (solid-state drives). Although the basic function of an FTL is to translate a logical sector address to a physical sector address in flash memory, efficient algorithms of an FTL have a significant impact on performance as well as the lifetime. After the dominant parameters that affect the performance and endurance are categorized, the design space of the FTL Architecture is explored based on a diverse workload analysis. With the proposed FTL architectural framework, it is possible to decide which configuration of FTL mapping parameters yields the best performance, depending on the differing characteristics of various NAND flash-based applications.

  • A Reconfigurable FTL (Flash Translation Layer) Architecture for NAND Flash-Based Applications A reconfigurable FTL (flash trans-lation Layer) Architecture for NAND flash-based applications
    ACM Trans. Embedd. Comput. Syst, 2008
    Co-Authors: Chanik Park, Wonmoon Cheon, Jeonguk Kang, Kangho Roh, Wonhee Cho Samsung Electronics, Jin-soo Kim
    Abstract:

    In this article, a novel FTL (flash translation Layer) Architecture is proposed for NAND flash-based applications such as MP3 pLayers, DSCs (digital still cameras) and SSDs (solid-state drives). Although the basic function of an FTL is to translate a logical sector address to a physical sector address in flash memory, efficient algorithms of an FTL have a significant impact on performance as well as the lifetime. After the dominant parameters that affect the performance and endurance are categorized, the design space of the FTL Architecture is explored based on a diverse workload analysis. With the proposed FTL architectural framework, it is possible to decide which configuration of FTL mapping parameters yields the best performance, depending on the differing characteristics of various NAND flash-based applications.

  • a re configurable ftl flash translation Layer Architecture for nand flash based applications
    Rapid System Prototyping, 2007
    Co-Authors: Chanik Park, Wonmoon Cheon, Myoungsoo Jung, Hanbin Yoon
    Abstract:

    In this paper, we propose a novel FTL (flash translation Layer) Architecture for NAND flash based applications such as mp3 pLayers, DSCs (Digital still camera) and SSDs (Solid-state disk). Even though the basic function of an FTL is to translate a logical sector address to a physical sector address in flash memory, its efficient algorithms have a significant impact on performance as well as lifetime. After we categorize dominant parameters that affect performance and endurance, we explore the design space of the FTL Architecture based on a diverse workload analysis. With our FTL architectural framework, we can decide which configuration of FTL mapping parameters yields the best performance depending on each NAND flash application behavior.

A Gueroui - One of the best experts on this subject based on the ideXlab platform.

  • toward an improvement of h 264 video transmission over ieee 802 11e through a cross Layer Architecture
    IEEE Communications Magazine, 2006
    Co-Authors: Adlen Ksentini, Mohamed Naimi, A Gueroui
    Abstract:

    The recently developed H.264 video standard achieves efficient encoding over a bandwidth ranging from a few kilobits per second to several megabits per second. Hence, transporting H.264 video is expected to be an important component of many wireless multimedia services, such as video conferencing, real-time network gaming, and TV broadcasting. However, due to wireless channel characteristics and lack of QoS support, the basic 802.11-based channel access procedure is merely sufficient to deliver non-real-time traffic. The delivery should be augmented by appropriate mechanisms to better consider different QoS requirements and ultimately adjust the medium access parameters to the video data content characteristics. In this article we address H.264 wireless video transmission over IEEE 802.11 WLAN by proposing a robust cross-Layer Architecture that leverages the inherent H.264 error resilience tools (i.e., data partitioning); and the existing QoS-based IEEE 802.11e MAC protocol possibilities. The performances of the proposed Architecture are extensively investigated by simulations. Results obtained indicate that compared to 802.11 and 802.11e, our cross-Layer Architecture allows graceful video degradation while minimizing the mean packet loss and end-to-end delays.

Jose Villalon - One of the best experts on this subject based on the ideXlab platform.

  • Cross-Layer Architecture for adaptive video multicast streaming over multirate wireless LANs
    IEEE Journal on Selected Areas in Communications, 2007
    Co-Authors: Jose Villalon, Pedro Cuenca, Luis Orozco-barbosa, Yongho Seok, Thierry Turletti
    Abstract:

    Multicast video streaming over multirate wireless LANs imposes strong demands on video codecs and the underlying network. It is not sufficient that only the video codec or only the underlying protocols adapt to changes in the wireless link quality. Research efforts should be applied in both and in a synchronized way. Cross Layer design is a new paradigm that addresses this challenge by optimizing communication network Architectures across traditional Layer boundaries. This paper presents cross-Layer Architecture for adaptive video multicast streaming over multirate wireless LANs where Layer-specific information is passed in both directions, top-down and bottom-up. The authors jointly consider three Layers of the protocol stack: the application, data link and physical Layers. The authors analyze the performance of the proposed Architecture and extensively evaluate it via simulations. The results show that the real-time video quality of the overall system can be greatly improved by cross-Layer signaling.

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