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Cooperative relaying technology is considered as a promising solution for the high data-rate coverage required in future wireless communication systems, where provision of reliable multimedia or data services for transmission control protocol (TCP) applications is of extreme importance. However, while the performance of cooperative relaying protocols has been extensively studied over physical layer, little attention has been paid to the impact of selection relaying on TCP performance. The authors investigate the TCP throughput in cooperative relaying networks and take a cross-layer design approach when selecting a relay to optimise the TCP throughput. The authors use first-order finite-state Markov channel to model the wireless time-varying channels, and formulate the cross-layer TCP throughput optimisation problem as a restless bandit system, which is a powerful stochastic control modelling framework and can be solved using linear programming algorithm. Simulation results were presented to illustrate the effectiveness of the proposed scheme. It was shown that the TCP throughput is determined by physical layer channel state and link-layer frame size and retransmission time. [ABSTRACT FROM AUTHOR]

The special section presents a collection of high quality research papers on the state-of-the-art in the emerging technologies for connected vehicles, the latest development in standardizations and regulations, as well as the potential services and applications for connected vehicle (CV) and autonomous vehicle (AV) systems. [ABSTRACT FROM AUTHOR]

In this paper, we propose an architecture of software-defined information-centric network virtualization with device-to-device (D2D) communications, which facilitates dynamic virtual resource allocation and content caching via a software-defined networking (SDN) controller with a global view of the system. In our proposed framework, substrate physical resources can be virtualized and shared among multiple mobile virtual network operators (MVNOs). Meanwhile, by means of integrating D2D communications into information-centric wireless networks, content caching is enabled not only in the air but in mobile devices as well. In addition, taking into consideration inaccurate channel estimation and measurement, we formulate the virtual resource allocation and caching optimization as a discrete stochastic optimization problem in which imperfect channel state information is incorporated. Because the formulated virtual resource allocation problem is a large-scale combinational optimization problem, we exploit discrete stochastic approximation approaches to cope with it. Finally, extensive simulations are conducted to demonstrate the effectiveness of the proposed scheme with different system parameters. Simulation results show that MVNOs can benefit from not only the sharing of physical infrastructure but from the caching functionality that exists in both the air and mobile devices as well. [ABSTRACT FROM PUBLISHER]