In this paper suitable MAC protocols for the implementation in PLC access networks are studied. We propose a logical model for the investigation of the MAC layer according to the applied transmission methods in the PLC systems and to the used telecommunication services. The impulsive noise has a big impact on the error behavior of the transmission, but there are various possibilities to do deal...

In order to improve the throughput performance of Medium Access Control (MAC) schemes in wireless communication networks, some researchers proposed to split the single shared channel into two subchannels: a control subchannel and a data subchannel. The control subchannel is used for access reservation to the data subchannel over which the data packets are transmitted, and such reservation can b...

-In this paper, we introduce a new mixed priority scheme that utilizes the logarithmically equi-spaced random transmitter power levels (LESRTPL) model to control the assignment of the transmitter power levels, assigned to each priority class, adaptively. Packets, of different priority classes contending simultaneously over the wireless channels to capture a contention slot, will transmit using ...

PRMA (packet reservation multiple access) is a reservation-ALOHA access protocol specifically designed for wireless microcellular networks that handle both real-time and non-real-time traffic. We present a thorough analysis of this protocol, considering real-time traffic only, based on a suitable Markov model. The size of the model is such that it can be directly used for an exact quantitative ...

There is a strong likelihood that future wireless communication systems will employ packetisedtransmission techniques. Such an approach would provide a number of benefits, including theability to integrate with emerging wired systems based on Asynchronous Transfer Mode (ATM).In addition, packet-based wireless networks would allow for diverse traffic types and inparticular, speec...

In order to improve the throughput performance of Medium Access Control (MAC) schemes in wireless communication networks, some researchers proposed to split the single shared channel into two subchannels: a control subchannel and a data subchannel. The control subchannel is used for access reservation to the data subchannel over which the data packets are transmitted, and such reservation can b...

Abstract. In this paper we propose analytic model for computing the delay of the slotted ALOHA protocol with Binary Exponential Backoff (BEB) with multiple priorities as a collision resolution algorithm in mobile information systems. If a packet which tries to reserve a channel collides times, it chooses one of the next 2 frames with equal probabilities and attempts the reservation again. We de...

Ad hoc networks provide data communication services without being bound to an existing infrastructure. An exciting application of highly dynamic ad hoc networks is the exchange of data between running vehicles. For air-interfaces based on a slotted Time Division Multiple Access (TDMA) scheme, slot synchronization is required among the rapidly moving vehicles. In this paper a scheme for complete...

In this article, we present a stochastic geometry-based model to investigate alternative medium access choices for LoRaWAN-a widely adopted low-power wide-area network (LPWAN) technology the Internet-of-Things. LoRaWAN adoption is driven by its simplified architecture, air interface, and access. The physical layer, known as Long Range (LoRa), provides quasi-orthogonal virtual channels through s...