the threshold of weak and strong synchronization in a coupled chaotic gaussian map isdemonstrated by using the pyragas’ terminology. however, vieira and lichtenberg have shown that thepyragas’ criteria for weak and strong synchronization cannot be used for all chaotic systems. in this articlewe demonstrated some interesting synchronization behavior of two coupled chaotic systems with some zeroa...

Medium access control (MAC) is one of the key requirements in underwater acoustic sensor networks (UASNs). For a MAC protocol to provide its basic function efficient sharing channel access, highly dynamic environment demands protocols be adaptive as well. Q-learning promising techniques employed intelligent solutions, however, due long propagation delay, performance this approach severely limit...

ALOHA is one of the most basic Medium Access Control (MAC) protocols and represents a foundation for other more sophisticated distributed and asynchronous MAC protocols, e.g., CSMA. In this paper, unlike in the traditional work that focused on mean value analysis, we study the distributional properties of packet transmission delays over an ALOHA channel. We discover a new phenomenon showing tha...

In this paper, we discuss the synchronization and anti-synchronization of two identical chaotic T-systems. The adaptive and nonlinear control schemes are used for the synchronization and anti-synchronization. The stability of these schemes is derived by Lyapunov Stability Theorem. Firstly, the synchronization and anti-synchronization are applied to systems with known parameters, then to systems...

We report an investigation into the effect of using smart antennas on the performance of the slotted ALOHA protocol with capture in a mobile communications environment with Rayleigh and Log-normal fading. Our results demonstrate that by using smart antennas, we can achieve higher performance in terms of capture probability and throughput when compared to a conventional antenna system using the ...

In modern synchronization networks, PRC primary devices have become an integral component necessary to ensure stable operation and long-term accuracy of reference signals. But their high cost insufficient use provide only one unit lead the need find other options. Frequency standard manufacturers supply PRS as dedicated hardware without redundancy, whereas in networks must be redundant order ma...

Recent and future communications networks have to provide QoS guarantees for a rapidly growing number of various telecommunication services. This can be ensured by application of an efficient MAC layer. Various communication technologies, such as cellular networks and PLC (PowerLine Communications) access networks, apply reservation MAC protocols, providing a good network utilization, which is ...

Title of dissertation: EQUILIBRIUM ANALYSIS AND CONTROL FOR DESIGN OF PACKET RESERVATION MULTIPLE ACCESS PROTOCOLS Amirali Sharifi, Doctor of Philosophy, 2010 Dissertation directed by: Professor Eyad H. Abed Department of Electrical and Computer Engineering The Packet Reservation Multiple Access (PRMA) protocol and its variants have been considered as possible access schemes for communication m...

We present a comprehensive steady-state analysis of threshold-ALOHA, distributed age-aware modification slotted ALOHA proposed in recent literature. In each terminal suspends its transmissions until the Age Information (AoI) status update flow it is sending reaches certain threshold ?. Once age exceeds ?, attempts transmission with constant probability ? slot, as standard ALOHA. analyze time-av...