نتایج جستجو برای: data delivery delay
تعداد نتایج: 2671350 فیلتر نتایج به سال:
Communication networks supporting real-time tasks need to guarantee timely delivery of critical data and commands. Worst-case delay performance of these networks can be analyzed using deterministic network calculus. In this report, we identify the discrepancy between existing bit-oriented delay bounding methods and packet-oriented behaviors of network devices. An optimization-based bit-oriented...
Optimizing routing in mobile adhoc networks is a challenging task. Since mobile adhoc networks are highly dynamic topology natured, several routing protocols face the challenge of delay and energy conscious routing. This paper proposes a novel delay and energy conscious routing approach based on ant colony optimization. Based on the estimated delay and residual energy of the nearby nodes, "...
BACKGROUND A study was undertaken to determine the influences of electrostatic charge, flow, delay, and multiple actuations on the in vitro delivery of salbutamol generated by a pressurised metered dose inhaler (pMDI) from small volume spacers used in infants. METHODS Ten actuations from a salbutamol pMDI were drawn at different flow rates after either single or multiple actuations, with or w...
in this study, a hierarchical hub location problem by considering different modes of transportation and maximum allowed delay is investigated. this study is done on iran’s express postal service with 2 days maximum delay in delivery considering ground and airport hubs. the problem is of the type of location and single allocation for collection, transfer and distribution of the shipments. all th...
A feedback-based congestion control mechanism is essential to realize an efficient best-effort service in highspeed networks. A window-based flow control mechanism called TCP (Transmission Control Protocol), a sort of feedbackbased congestion control mechanism, has been widely used in the current Internet. Recently, TCP Vegas has been proposed, which is another version of TCP mechanism, and ach...
Even though long delay is permitted in Delay Tolerant Networks (DTNs), some applications explicitly demand an upper bound imposed on message delivery delay for the application specific purpose. Despite some researcher have proposed to meet new requirement, their approaches have weakness in the point of implementation since infinite buffer space on a node or the knowledge prior the moment regard...
Multimedia applications integrate a variety of media , namely, audio, video, images, graphics, text, and data. These media have diierent bandwidth, delay, and loss requirements. Data traac is predominantly bursty and it requires reliable service from the network, but it can tolerate delay. In contrast, audio and video traac is stream-oriented, it can tolerate some loss of data, but it requires ...
In hierarchical reliable multicast schemes, the number of repair proxies and their locations influence the delivery delay. Low delivery delay is essential for the transmission of real time media. In this paper, we propose a method to decide optimal locations of repair proxies that minimize the mean delivery delay of all receivers in heterogeneous networks using a dynamic programming approach. A...
Infostations offer geographically intermittent coverage at high data rates for mobile wireless networks. The Infostation model trades off delay of data delivery for increased network capacity. Replication and storage of information in multiple nodes of a mobile network can also be traded off for reduction in delay. Thus, augmenting the Infostation model with information replication, a new conce...
In an on-road environment, motor-engines severely disturb the wireless link of a sensor node, leading to high package loss rate, high delivery delay, and poor radio communication quality. The existing data delivery mechanisms, such as the ACK-based retransmission mechanism and window-based link quality estimation mechanism, could not handle these challenges well. To solve this challenge, we pro...
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