The hidden-node problem has been shown to be a major source of Quality-of-Service (QoS) degradation in Wireless Sensor Networks (WSNs) due to factors such as the limited communication range of sensor nodes, link asymmetry and the characteristics of the physical environment. In wireless contention-based Medium Access Control protocols, if two nodes that are not visible to each other transmit to ...

This paper develops a method for solving the single product multi-period production-planning problem, in which the production and the inventory costs of each period arc concave and backlogging is not permitted. It is also assumed that the unit variable cost of the production evolves according to a continuous time Markov process. We prove that this production-planning problem can be Stated as a ...

This paper propose an access method for wireless sensor networks. It reduces collisions due to hidden nodes, a source of significant energy dissipation. Our access method operates similarly to SMAC by alternating sleeping and active periods, but it does not use RTS/CTS. We analyze the hidden node problem to derive expressions for the number of hidden nodes and the probability of collisions. We ...

Hidden nodes are a fundamental problem that can potentially affect any wireless network where nodes cannot hear each other. Although the hidden node problem is well known, so far only few papers have quantified its effects in a comprehensive manner. This paper represents a first step towards getting a quantitative insight into the impact of hidden nodes on the performance of wireless networks. ...

This article presents description of the simulation study of the low rate wireless personal area networks, defined by the IEEE 802.15.4 standard. The obtained results make available an evaluation of the effective transmission rate of a transmission channel, the resistance to the phenomenon of hidden station as well as sensibility to the problem of the exposed node. Index Terms – low rate wirele...

In large-scale, heavy loaded sensor networks the hidden node problem significantly restricts the attainable throughput. This paper examines this issue and depicts why most TDMA as well as dedicated hybrid MAC protocols are still negatively affected by this phenomenon. The concept of probabilistic self-stabilization is adopted to provide a framework for implementable reservation MAC protocols th...

Several MAC layer power control protocols have been proposed to address the limited power supplies in ad hoc networks. Recent protocols suggest varying the transmission power such that the RTS/CTS handshake is done at the maximum, and the Data-ACK are transmitted at the minimum necessary transmission power level. It has also been suggested to periodically use maximum transmission power during D...