Relay-based cooperative systems have recently attracted significant attention since they enable exploiting the inherent spatial diversity of wireless networks with single antenna terminals. In this paper, the authors address the error performance of a cooperative diversity network consisting of a source, a destination, and multiple dual-hop amplify-and-forward (AF) relays in Rayleigh fading cha...

Cooperative Adaptive Cruise Control (CACC) is considered as a key enabling technology to automatically regulate the intervehicle distances in a vehicle platoon to improve traffic efficiency while maintaining safety. Although the wireless communication and physical processes in the existing CACC systems are integrated in one control framework, the coupling between wireless communication reliabil...

This article focuses on the secure routing problem in decentralized Internet of Things (IoT). We consider a typical IoT scenario composed peer legitimate devices, unauthorized devices (eavesdroppers), and selfish helper jamming (jammers), propose novel incentive jamming-based scheme. For pair source destination, we first provide theoretical modeling to reveal how transmission security performan...

Recent autonomous intelligent transportation systems commonly adopt vehicular communication. Efficient communication between vehicles-to-everything (AV2X) is mandatory to ensure road safety by decreasing traffic jamming, approaching emergency vehicle warning, and assisting in low visibility traffic. In this paper, a new adaptive AV2X model, based on novel optimization method enhance the connect...

Enhancement the Performance of MANET (Mobile Ad-hoc Network) using spatial d iversity. Spatial d iversity implemented using cooperative transmission technique in Medium access control (MAC) layer level protocol. In noisy environment limit the network performance like coverage area, limit number of node, degrade packet transmission rate, increase packet loss rate etc. In this paper enhance the s...

In this paper, we study the problem of best transmission link selection in a decode-and-forward (DF) cooperative system from capacity point of view. The transmission link can be a cooperative (via a relay) or direct link between the source and destination nodes. In a two-hop DF system with multiple relays and a direct link in between the source and destination, the transmission link selection c...

Differentsystemmodels utilizing nonorthogonal multiple access (NOMA) have been successfully studied to meet the growing capacity demands of Internet Things IoT) devices for next-generation networks. However, analyzing antieavesdropping NOMA systems under different scenarios and settings still needs further exploration before it can be practically deployed. Therefore, in this article, we study s...

We study timely status updates of a real-time system in an adversarial setting. The system samples a physical process, and sends the samples from the source (e.g., a sensor) to the destination (e.g, a control center) through a channel. For realtime monitoring/control tasks, it is crucial for the system to update the status of the physical process “timely”. We measure the timeliness of status up...

MAC layer jamming is a common attack on wireless networks, which is easy to launch by the attacker and which is very effective in disrupting the service provided by the network. Most of the current MAC protocols for wireless networks, for example, IEEE 802.11, do not provide sufficient protection against MAC layer jamming attacks. In this paper, we first use a non-cooperative game model to char...

We consider cooperative space-frequency block-coded OFDM (SFBC-OFDM) networks with amplify-and-forward (AF) and decode-and-forward (DF) protocols at the relays. In cooperative SFBC-OFDM networks that employ DF protocol, (i), intersymbol interference (ISI) occurs at the destination due to violation of the “quasistatic” assumption because of the frequency selectivity of the relay-to-destination c...