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Currently, most Landsat satellites are deployed in the low earth orbit (LEO) to obtain high-resolution data of the Earth surface and atmosphere. However, the return channels of LEO satellites are unstable and discontinuous intrinsically, resulting from the high orbital velocity, long revisit interval, and limited ranges of ground-based radar receivers. Space-based information networks, in which data...
TCP Incast is one of the typical datacenter problems that may affect network efficiency in a many to one transmission session, in which the completion time of the whole session depends on the last finishing flow. In this paper a session-aware mechanism is proposed that intelligently chooses only the leading flows to slow down at the presence of congestion, so the lagging ones will have a higher chance...
The ability of reconfiguring a system during runtime is essential for dynamic real-time applications in which resource usage is traded online for quality of service. The HaRTES switch, which is a modified Ethernet switch, holds this ability for the network resource, and at the same time it provides hard real-time support for both periodic and sporadic traffic. Although the HaRTES switch technologically...
De-duplication technology has been widely used in disk-based backup system in order to save disk space and reduce backup traffic through internet. But unfortunately De-duplication based backup system often has metadata indexing bottleneck that greatly reduces the backup efficiency and throughput. Existing approaches usually take advantage of backup data flow's similarity or locality to accelerate...
Vehicles in Intelligent Transportation System employ IEEE 802.11p/1609 protocols to communicate with other vehicles or roadside infrastructure within a specific area. Messages related with traffic safety can be delivered timely for collision avoidance and etc. Meanwhile, non-safety related infotainment messages can also be transmitted besides safety-critical information. Many of the safety critical...
The resource of DTN (Delay Tolerant Network) is constrained and its links are unstable, so the states of network can't be fed back in time to the source node of data. The rate control mechanism and window mechanism of congestion control can't solve the congestion problem of DTN. The paper has proposed A DTN Congestion Control Mechanism Based on Distributed Storage (DCM). When the congestion of a DTN...
Asy_pathchar is an asymmetric link bandwidth measurement algorithm based on calculating the relationship between the RTT latency and the measuring packet size. The problem of this algorithm is detailedly analyzed and a new algorithm named Asy_pro is put forward. Network simulation experimentspsila result validates that the new algorithm has improved the overall performance on measuring time-consuming,...
Nowadays Internet become more and more important in our life maintenance, the security of network was put into an important place. The valid data of the network traffic monitor not only enables network administrators to obtain the most direct information of the network movement in time; at the same time, completes the supervision of the traffic, and is also a necessary method of network management...
Reliable Server Pooling (RSerPool) denotes the new IETF standard for a lightweight server redundancy and session failover framework for availability-critical applications. A number of research papers have already addressed the service and pool management performance of RSerPool in general. However, the important topic of security, including the system robustness against intentional attacks, has not...
This paper reviews the state-of-the-art of peer-to-peer Internet video multicast technologies. We describe the basic taxonomy of peer-to-peer multicast, and closely examine two approaches (tree-based and mesh-based). Then we discuss their fundamental tradeoff and potential for large-scale deployment respectively. We also discuss the influence of NATs and Firewalls and interpret their corresponding...
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