Improving the admission control process in wireless metropolitan area networks (WMAN) based on the IEEE 802.16e standard can improve the QoS. Because IEEE 802.16e supports five classes of service as well as mobility, ...
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Improving the admission control process in wireless metropolitan area networks (WMAN) based on the IEEE 802.16e standard can improve the QoS. Because IEEE 802.16e supports five classes of service as well as mobility, an admission control policy for non-preprovisioned service flow is proposed. This policy is compatible with the QoS parameters for each service class defined in the standard. As improvements, the guard channel scheme is used to give handover connections higher priority and a novel proportional bandwidth-borrowing scheme is added to prioritize the different service classes. The simulation results show the proposed admission control policy maximizes the bandwidth utilization and the use of the two schemes provides a reasonable priority order of new originated connections and handover connections of different service classes. The connection-blocking and connection-dropping probabilities were reduced to the extent that they can be ignored
Road boundary detection and tracking is an important and integral function in advanced driver-assistance system. This paper proposes an algorithm, which can follow multi-kinds of lane, straight and curved, quickly and...
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Grid scheduling which aims at improving resource utilization and grid application performance is a key concern in grid. Currently, much research can be found about grid scheduling and some algorithms on it were propos...
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Grid scheduling which aims at improving resource utilization and grid application performance is a key concern in grid. Currently, much research can be found about grid scheduling and some algorithms on it were proposed. However, since grid resources are autonomic, distributed and their status change over time, those scheduling algorithms did not fit for the cases well. In this paper, a cache based feedback grid scheduling (CBFS) approach is presented to capture the dynamics and impact of simultaneously co-allocated tasks in a grid. In this approach, grid scheduler utilizes recent resource performance data, such as recent task submitting time and execution time of task which are kept in cache and a feedback approach to engineer load balancing across multiple grid resources. After comparing this dynamic grid scheduling approach with previous research, it is found that CBFS is more generous than other scheduling approaches. Experimental results demonstrate that this approach diminishes latency and contributes to the overall grid load balancing, which significantly improves resource utilization and response time of tasks.
Security has become an important issue for mobile ad hoc networks especially for the more security-sensitive applications used in military and critical networks. As a positive protection, intrusion detection system ha...
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ISBN:
(纸本)0780384032
Security has become an important issue for mobile ad hoc networks especially for the more security-sensitive applications used in military and critical networks. As a positive protection, intrusion detection system has been successfully applied in wired networks. However, these correlative researches are not fit for mobile ad hoc networks. This paper puts forward a novel architecture based on mobile agent platform for superior intrusion detection in mobile ad hoc networks. Furthermore, an IDS agent selection algorithm and its security communication mechanism are proposed.
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