As wireless body area networks (WBANs) become a key element in electronic healthcare (e-healthcare) systems, the coexistence of multiple mobile WBANs is becoming an issue. The network performance is negatively affected by the unpredictable movement of the human body. In such an environment, inter-WBAN interference can be caused by the overlapping transmission range of nearby WBANs. We propose a...

We present a game-theoretic approach to the study of scheduling communications in wireless networks and introduce and study a class of games that we call Interference Games. In our setting, a player can successfully transmit if it “shouts strongly enough”; that is, if its transmission power is sufficiently higher than all other (simultaneous) transmissions plus the environmental noise. This phy...

Because random variations in signal-to-noise plus interference ratio (SNIR) profoundly affect mobile ad hoc network performance, good estimates of mean SNIR are essential for reliable routing. This paper proposes that signal levels be estimated independently from noise plus interference (N+I) levels because 1) N+I levels can be estimated when the signal is absent, 2) signal estimates must allow...

We characterize a two tier heterogeneous network, consisting of classical sub-6GHz macro cells, and multi Radio Access Technology (RAT) small cells able to operate in sub-6GHz and millimeter-wave (mm-wave) bands. For optimizing coverage and to balance loads, we propose a two-step mechanism based on two biases for tuning the tier and RAT selection, where the sub-6GHz band is used to speed-up the...

We propose a multiuser scheduler based on signal-to-interference-and-noise ratio (SINR) constraints using a non-orthogonal space-division multiple access (SDMA) MIMO-OFDM. To mitigate the complexity needed for computing the linear transceiver filters with a possible number of non-feasible users, we propose to preselect the optimal users using a virtual signal-to-noise ratio (vSNR). This is comp...

In this paper, we investigate opportunistic relay and jammer cooperation schemes in multiple-input multiple-output (MIMO) buffer-aided relay networks. The network consists of one source, an arbitrary number of relay nodes, legitimate users and eavesdroppers, with the constraints of physical layer security. We propose an algorithm to select a set of relay nodes to enhance the legitimate users’ t...

We study auction mechanisms for allocating power among a group of spread spectrum users. The users are assumed to share the bandwidth with a licensed user, or spectrum owner, which imposes a received power constraint (corresponding to a constraint on interference) at a particular measurement location. Both co-located and non-collocated receivers are considered. Each user receives a utility that...

The signal to interference ratio (SIR) in the presence of multipath fading, shadowing and path loss is a valuable parameter for studying the capacity of a wireless system. This paper presents a new generalized path loss equation that takes into account the large-scale path loss as well as the small-scale multipath fading. The probability density function (pdf) of the SIR for selforganising wire...

For a given network, a backbone is an overlay network consisting of a connected dominating set with additional accessibility properties. Once a backbone is created for a network, it can be utilized for fast communication amongst the nodes of the network. The Signal-to-Interference-plus-Noise-Ratio (SINR) model has become the standard for modeling communication among devices in wireless networks...

We present in this paper a linear blind multiuser receiver, referred to as the Capon receiver, for code-division multiple-access (CDMA) systems utilizing multiple transmit antennas and space-time (ST) block coding. The Capon receiver is designed by exploiting signal structures imposed by both spreading and ST coding. We highlight the unique ST coding induced structure, which is shown to be crit...