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Hybrid wireless mesh protocol (HWMP) is consists of on demand routing protocol RM-AODV and pro-active routing based on tree-base routing. When a mesh portal exists as a gateway of a wireless mesh network, tree-based routing is very efficient in fixed mesh deployments. However, with the distance vector routing method, all mesh points need route metrics based on the network topology and many packets...
This paper presents a Powerpoint presentation discussing a method that reduces the reserved bandwidth of large-scale data transfers over Diffserv AF networks.
In the Cybermedia Center, Osaka University (CMC), we have applied the NAREGI grid middleware to our latest large-scale computing system for nationwide joint-use, and have made grid computing technology available on them coexisting with the conventional computing style. In this paper, we will describe an authentication system solving the problems which we have encountered in construction of the grid...
Applications, such as grid computing, process their data over wide-area networks. The schedule of these applications is influenced by the duration of data transfer. Guaranteeing the performance of data transfer is helpful to optimize the schedule of these applications. Diffserv AF is an efficient QoS control method to guarantee the duration of data transfer, but the resource is limited in many network...
Remote backup and some grid applications transfer large amounts of data over long distance networks. The throughput of TCP Reno and NewReno over LFNs (large fat pipe networks) is much smaller than application requirements. High speed protocols are being developed to overcome this problem. However, the fairness of these high speed protocols with conventional TCP (Reno or NewReno) is not sufficient...
We have developed a data transfer method that uses less reserved bandwidth on DiffServ AF networks. Our method consists of a dynamic QoS control method and a data transfer protocol that uses two kinds of TCP connections. We simulated the transfer of data using our method on a network simulator and found that it performed better than current methods. By reducing reserved bandwidth, our method will...
Previously, an optical code-division multiplexing (OCDM)-based network architecture was proposed to improve the wavelength utilization and to provide finer bandwidth granularities to users. By this technology, different channels using distinct optical codes (OCs) can be multiplexed onto the same wavelength, in which an OC is considered as the basic unit in lightpath provisioning. In the ideal case,...
Applications, such as grid computing, remote backup, and contents distribution, transfer bulk data over wide-area networks. These applications schedule work to satisfy the user requirements. Guaranteeing the performance of data transfer is helpful for scheduling these applications. Diffserv AF is a QoS control method that guarantees data transfer performance. However, the throughput of conventional...
Optical code division multiplexing (OCDM) path enabling to establish finer granularity path than wavelength path and its hierarchical architecture for multi-granularity optical path switching have been investigated. Significant improvement of blocking probability is achieved, compared to the conventional multi-granularity OXC based upon wavelength.
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