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Distributed file system has the characteristics of large capacity, good scalability and high reliability, which make it widely used in many areas involving large-scale data storage. It offers simplified, highly-available services for users to access data. However, due to the non-metadata design, the performance of traversal operation on large directories in those non-metadata distributed file systems...
Emergency communication in heterogeneous networks with fragile connectivity is a challenging task. Emergency delay-tolerant network (EDTN) is a new network architecture based on the concept of delay tolerant networks (DTNs) to provide emergency service. However, existing transport protocols like TCP are not suitable to provide emergency service well with instable bandwidth and connectivity, because...
In this paper, multiple compression algorithms have been compared and in accordance with the characteristics of the session initiation protocol (SIP), empel-ziv-storer-szymanski (LZSS) is selected as the basic algorithm for the SIP signaling compression (SigComp) in IP multimedia subsystem (IMS). In order to further enhance the SIP SigComp ratio, the LZSS with Huffman coding compression algorithm...
How to guarantee user's QoS (Quality of Service) demands becomes increasingly important in service-oriented grid environment. Current research on grid resource advance reservation, a well-known and effective mechanism to guarantee QoS, forces on proposing theoretic architecture to support advance reservation. Detailed research on advance reservation is scarce. For that, SNAP (Service Negotiation and...
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