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Communications and Networking in China, 2008. ChinaCom 2008. Third International Conference on

Date 25-27 Aug. 2008

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Displaying Results 1 - 25 of 337
  • [Copyright notice]

    Publication Year: 2008, Page(s): i
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  • [Title page]

    Publication Year: 2008, Page(s): ii
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  • Greetings from the General Chairs

    Publication Year: 2008, Page(s):iii - v
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  • Quality of service challenges in IP networks

    Publication Year: 2008, Page(s): vi
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    IP-based networks play a key role in today¿s telecommunications. The success of this technology was due, among other factors, to the simplicity and robustness of the Internet Protocol. The price for this simplicity was the best-effort operation of IP networks leading to lack of any quality of service guarantees. As long as the early Internet was used by university professors, students, and others... View full abstract»

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  • Global ICT development and ITU

    Publication Year: 2008, Page(s):vii - viii
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    Telecommunications and information and communication technologies (ICT) are amongst the main drivers for the social and economic development of mankind and play a vital role in enhancing access to basic services in all sectors of life and in meeting the targets in millennium development goals. With almost half of the world¿s population having access to mobile cellular services, the increasing and... View full abstract»

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  • Steering Committee

    Publication Year: 2008, Page(s): ix
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  • Organizing Committee

    Publication Year: 2008, Page(s): x
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  • Technical Program Committee

    Publication Year: 2008, Page(s):xi - xvi
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  • Table of contents

    Publication Year: 2008, Page(s):xvii - xxxiii
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  • WCN-01, Wireless LANs - parallel session 1

    Publication Year: 2008, Page(s): 1
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  • Collision Classification Resolution algorithm for IEEE 802.11 WLAN

    Publication Year: 2008, Page(s):2 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2962 KB) | HTML iconHTML

    Traditional backoff algorithms in WLAN extend their contention windows to resolve collisions. However, collisions may still occur due to intersecting windows among contending stations. Based on such observation, this paper puts forward a collision classification model to classify collisions into two categories and proposes an algorithm featuring collision classification resolution (CCR) to resolve... View full abstract»

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  • Adaptive buffer sizing for TCP flows in 802.11e WLANs

    Publication Year: 2008, Page(s):7 - 11
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2476 KB) | HTML iconHTML

    We consider the provision of access point buffers in WLANs. We first demonstrate that the default use of static buffers in WLANs leads to either undesirable channel under-utilisation or unnecessary high delays, which motivates the use of dynamic buffer sizing. Although adaptive algorithms have been proposed for wired Internet, a number of fundamental new issues arise in WLANs which necessitates ne... View full abstract»

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  • Performance analysis of service differentiation schemes for IEEE 802.11 Wireless LANs in non-saturated conditions

    Publication Year: 2008, Page(s):12 - 16
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2670 KB) | HTML iconHTML

    In order to support quality of service (QoS) in 802.11 wireless LAN, current research work as well as the enhanced DCF (EDCF) defined in 802.11e standard, tends to provide differentiated services by varying the parameters of MAC protocol. In this paper, we present an analytical model for performance evaluation of these service differentiation schemes in non-saturated traffic conditions. The analyt... View full abstract»

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  • A lightweight solution for Wireless LAN: Letter-envelop protocol

    Publication Year: 2008, Page(s):17 - 21
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (321 KB) | HTML iconHTML

    Wireless local area networks (WLAN) are increasingly deployed because of the freedom wireless communications afford and the decreasing costs of the underlying technology. Together with its higher and higher popularity, the Internet has also shown more and more weakness of wireless protocols that lead to attacks. There are a lot of efforts to improve the security of wireless network (from IEEE 802.... View full abstract»

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  • WCN-02, mobile internet - parallel session 1

    Publication Year: 2008, Page(s): 22
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  • A secure incentive scheme for delay tolerant networks

    Publication Year: 2008, Page(s):23 - 28
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1801 KB) | HTML iconHTML

    Delay tolerant networks (DTNs) provide a promising solution to support delay tolerant applications in areas where end-to-end network connectivity is not available. In DTNs, the intermediate nodes on a communication path are expected to store, carry and forward the in-transit messages (bundles) in an opportunistic way, which is also named as opportunistic data forwarding. Opportunistic data forward... View full abstract»

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  • Embedded info-security solutions for vehicular networks

    Publication Year: 2008, Page(s):29 - 33
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (685 KB) | HTML iconHTML

    The emerging vehicular networks in the forms of intra-car, car-to-car, and car-to-infrastructure communications will enable a variety of applications for safety, traffic efficiency, driver assistance, as well as infotainment to be incorporated into future automotive designs. However, the availability of these exciting automotive applications can also lead to formidable set of exploits and vulnerab... View full abstract»

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  • Service migration - a new paradigm for content distribution systems

    Publication Year: 2008, Page(s):34 - 38
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB) | HTML iconHTML

    A new network service framework highlighting the concept of service migration is presented in this article. The proposed framework take into account essential service quality factors, such as server loading, bandwidth, delay, and so on, and then dynamically migrates an ongoing service from a distant server to a new server with shorter "weighted network distance" to the client. As a result, the ind... View full abstract»

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  • A high performance multicasting mechanism in Mobile Grid

    Publication Year: 2008, Page(s):39 - 43
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (223 KB) | HTML iconHTML

    The grid would see the countless mobile devices becoming the most important users. However, the bottleneck is still at the last mile from the backbone to these mobile terminals where wireless environment places limitations on the rate and amount of communication. Currently, point-to-multipoint (PTM) communication is an effective solution to this limitation. This paper developed a new PTM mechanism... View full abstract»

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  • WCN-21, channel sensing, modeling and estimation - parallel session 1

    Publication Year: 2008, Page(s): 44
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  • An efficient iterative DFT-based channel estimation for MIMO-OFDM systems on multipath channels

    Publication Year: 2008, Page(s):45 - 49
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1300 KB) | HTML iconHTML

    In this paper, an efficient iterative discrete Fourier transform (DFT) -based channel estimator with good performance for multiple-input and multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems such as IEEE 802.11n which retain some sub-carriers as null sub-carriers (or virtual carriers) is proposed. In order to eliminate the mean-square error (MSE) floor effect existed i... View full abstract»

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  • An improved kalman filter algorithm for UWB channel estimation

    Publication Year: 2008, Page(s):50 - 54
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1184 KB) | HTML iconHTML

    This paper deals with channel estimation for ultra-wideband (UWB) wireless communication systems in dense multipath environments. An improved Kalman filter algorithm is proposed for estimating and tracking the channel impulse response (CIR) of time-varying channels. This algorithm includes two steps: frequency-domain pre-filter and Kalman filter. By introducing frequency-domain pre-filter to simpl... View full abstract»

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  • Near-far resistant successive interference cancellation detector in UWB systems

    Publication Year: 2008, Page(s):55 - 59
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    Similar to code-division multiple access (CDMA) systems, UWB systems used for multiple access communication environments have the near-far problem, which degrades system performance. To overcome this drawback, several advanced receiver structures have been proposed. Unlike the conventional UWB receiver which treats multiple access interference (MAI) as if it were AWGN, multiuser receivers treat MA... View full abstract»

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  • Interference-aware physical carrier sensing for maximum throughput in ad hoc networks

    Publication Year: 2008, Page(s):60 - 64
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (450 KB) | HTML iconHTML

    Physical carrier sensing plays an important role in collision avoidance in wireless networks, and the size of the physical carrier sense threshold has a great impact on the system performance. As the channel access activities and packet reception rate of a node is affected by the accumulative interference, we present a new analytical approach that demonstrates how to tune the sense threshold to re... View full abstract»

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  • FCN-01, Frontiers of switching technologies - Parallel session 1

    Publication Year: 2008, Page(s): 65
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