In the past decade, cognitive radio and cooperative communication techniques have been
proposed in the literature for efficiently utilizing the radio resources. Cognitive radio is an …

Abstract Machine-to-machine (M2M) communications emerge to autonomously operate to
link interactions between Internet cyber world and physical systems. We present the …

Connectivity is an important key performance indicator and a focal point of research in large-
scale wireless networks. Due to path-loss attenuation of electromagnetic waves, direct …

Robust network design against attacks is one of the most fundamental issues in Internet of
Things (IoT) architecture as IoT operations highly rely on the support of the underlaying …

Providing direct communications among a rapidly growing number of wireless devices
within the coverage area of a cellular system is an attractive way of exploiting the proximity …

We propose transmit antenna selection (TAS) in decode-and-forward (DF) relaying as an
effective approach to reduce the interference in underlay spectrum sharing networks with …

The constantly growing wireless bandwidth demand is pushing wireless networks to multi-
tier architectures consisting of a macrocell tier and a number of dense small cell deployment …

Device-to-device-based heterogeneous cellular networks (HCNs) have received
considerable attention recently. However, connectivity optimization is a challenging problem …

To fully empower sensor networks with cognitive Internet of Things (IoT) technology, efficient
medium access control protocols that enable the coexistence of cognitive sensor networks …

Cognitive radio networks using relays have been introduced to enhance secondary network
performance by having secondary users (SUs) transmit in two hops. This paper develops a …