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Wireless control systems are gaining a lot of attention, due to its easy deployment comparing to wired control systems recently. Real-time wireless networks have been proposed to give preference to high-priority tasks and keep timeliness of packet delivery. In control systems, however, network delay influences significantly the control system performance, whose applications have dynamic characteristics...
Real-time applications over wireless networks often suffers from jitter, delay and packet loss. The traditional techniques for error control are FEC (Forward Error Correction) and ARQ (Automatic Repeat Request). In this paper a hybrid FEC/ARQ mechanisms with limiting the slots number between the loss of the last retransmission of the original block n and the reception of block n + φ is analyzed in...
The latest 4G wireless technology, Long Term Evolution (LTE), is expected to be a promising wireless network for smart grid communications due to its high data rate and low delay. The needs of real time communications in the smart grid require reliable, confident and well tested wireless networks. Scheduling is one of the mechanisms which has a crucial role on the smart grid performance since it is...
Call admission control mechanisms play an important role in heterogeneous wireless networks where different radio access technologies will coexist to grant Quality of Service (QoS) in a network. They are used to decide whether or not an incoming service request will be accepted according to an admission constraint as well as determining in which radio access technology among the available it will...
Video transmission over 802.11 wireless networks poses many challenges. Bandwidth demands and timing constraints are two major challenges for real time video transmission over wireless. To increase network throughput as well as overall network capacity, the use of cross layer design approach is required. One of such design approaches includes physical (PHY) and medium access control (MAC) layers considerations...
Providing end-to-end support for Quality of Service (QoS) guarantees is a central and critical issue in heterogeneous networks. In this paper, we address the problem of assigning delay budgets to each network node along the routing path so that the end-to-end delay requirements of the supported applications are met. In order to meet the QoS requirements of multimedia applications, different scheduling...
Supporting real-time applications is paramount to sustaining the growth of wireless networks. Real time applications require strict delay guarantee, i.e., a packet delayed beyond certain predefined value is dropped. Fortunately, depending on the codec used, real-time applications can sustain some loss gracefully. Aim of an admission control algorithm is to make sure that when a new flow is admitted,...
This paper describes a hierarchical wireless network architecture for real time remote coordination and monitoring in distributed applications. The problem of defining a communication architecture keeping in view the constraints imposed by control and monitoring tasks requires a co-design approach. The present framework takes into account the available infrastructure to satisfy the requirements of...
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