Yutao Ling

Wuhan University, Wu-han-shih, Hubei, China

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Publications (5)0 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: In next-generation wireless networks, effective management of the limited radio resources is very important to provide mobile multimedia services with Quality of Service (QoS) guarantees. Many mechanisms based on Bandwidth Reservation (BR) have been proposed to decrease connection blocking/dropping probability. In this paper, we propose an adaptive and dynamic reservation as well as Call Admission Control (CAC) method for multimedia traffic in wireless systems. The analytical results are supported by simulation and show that this work improves the service quality by minimising the new Call Blocking Probability (CBP) and handoff Call Dropping Probability (CDP).
    International Journal of Computer Applications in Technology 03/2011; 42(4):298-305.
  • [Show abstract] [Hide abstract]
    ABSTRACT: In next generation wireless networks, great challenges have been posed to provide mobile multimedia services with QoS guarantees. Since bandwidth is a scarce resource in wireless networks, effective management of the limited radio resources is important to enhance the network performance. In this paper, we propose an adaptive and dynamic resource reservation and call admission control (CAC) scheme for multimedia traffic in wireless systems. The analytical results are supported by simulation and show that this work improves the service quality by minimizing the new call blocking probability and handoff call dropping probability.
    Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on; 10/2009
  • Yutao Ling, Benshun Yi, Qiuping Zhu
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    ABSTRACT: One of the major design issues in wireless overlay networks is the support of vertical handoff. It is becoming essential to offer vertical handoff solutions where users can move among various network types efficiently and seamlessly. Vertical handoff is the switching process between heterogeneous wireless networks. In this paper, we propose and analyze a novel vertical handoff decision strategy that considers the performance of the whole system. This strategy takes into account the network bandwidth, received signal strength (RSS) and variation of RSS. The performance comparison of the proposed vertical handoff decision scheme and existing scheme shows that the proposed scheme can reduce the handoff call dropping probability.
    Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on; 10/2009
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    ABSTRACT: The measurement of alternating current (AC) is realized by using fiber Bragg grating (FBG), giant magnetostriction material (GMM), and the technology of fiber coupler demodulation (fiber wavelength division multiplexing filter, FWDMF). The magnetostrictive effect of GMM, the theoretical analysis of the FBG current measurement and the interrogation technology of FWDMF are introduced as well. The sensing unit of AC current measurement is constructed with magnetostrictive material and FBG. The feasibility of AC current measurement by using this method is proved, when the AC exciting current is in the scope of 0~2A.
    Proc SPIE 12/2008;
  • Yutao Ling, Benshun Yi, Qiuping Zhu
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    ABSTRACT: One of the major design issues in heterogeneous wireless networks is the support of vertical handoff. Vertical handoff occurs when a user with a multi-interface terminal changes association from one type of wireless access technology to another while maintaining an active session. It is believed that vertical handoff decision will be based on multiple criteria. In this paper, new handoff criteria are introduced along with an improved vertical handoff decision strategy based on fuzzy logic. A performance study using the integration of cellular networks and WLANs as an example shows that our proposed vertical handoff decision algorithm can reduce the handoff call dropping probability as well as unnecessary handoffs in heterogeneous wireless networks.
    Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on; 11/2008