Real-time applications often have mixed hard and soft deadlines, can be preempted subject to the cost of context switching or the restart of computation, and have various data dependency. The simple but widely used task completion ratio, as the Quality of Service (QoS) metric, does not capture these characteristics and can not reflect user perceived QoS well. In this paper, we propose a new qua...

We propose to use a mathematical method based on stochastic comparisons of Markov chains in order to derive performance indice bounds‎. ‎The main goal of this paper is to investigate various monotonicity properties of a single server retrial queue with first-come-first-served (FCFS) orbit and general retrial times using the stochastic ordering techniques‎.

Embedded applications have become more and more complex, increasing the demands on the communication network. For reasons such as safety and usability, there are real-time constraints that must be met. Also, to offer high performance, network protocols should offer efficient user services aimed at specific types of communication. At the same time, it is desirable to design and implement embedde...

The FfMP (Fault-Tolerant Multiprocessor) is one of two central aircraft fault-tolerant architectures now in the prototype phase under NASA Langley Research Center sponsorship. 1,2 The intended application of the computer includes such critical real-time tasks as "fly-by-wire" active control and completely automatic Category III landings (zero visibility and zero ceiling) of commercial aircraft....

This paper considers a two-echelon capacitated supply chain with two non-identical retailers and information sharing. We characterize the optimal inventory policies. We also study the benefits of the optimal stock rationing policy over the first come first served (FCFS) and the modified echelon-stock rationing (MESR) policies. © 2006 Elsevier B.V. All rights reserved.

Satellites are going to revolutionize the Internet of Things (IoT) connectivity enabling ubiquitous coverage targeted by 5G and upcoming 6G networks. While potentials satellite IoT unquestionable, many challenges still remain unsolved. In present work, we design a Long Range Wide Area Network (LoRaWAN) with mobile gateways (GWs) installed on Low Earth Orbit (LEO) satellites. We address synchron...