Slotted ALOHA Protocol for Next Generation IoT

Machine to Machine (M2M) communication is used to maintain the connectivity between the various devices in IoT. One of the major issues of Machine to Machine (M2M) communications is to enhance the network lifetime with the help of an efficient MAC protocols. Slotted ALOHA Protocol is simple random access technique used in low power applications like LoRaWAN (Long Range Wireless Area Network). This approach gives an improved result as compared to P-persistence slotted ALOHA. In this paper, we consider an IoT -M2M network comprises of a large no of devices that transmit data packets to a gateway. We have tried to reduce the collision, which directly reduce retransmission of data packets. We propose Adaptive pSlotted ALOHA Protocol using Successive Interference Cancellation (SIC). It offers high throughput and reduces the delay. It is the simplest way of the channel allotment among the users. The proposed p-Slotted ALOHA protocol using SIC is better than the p-persistence slotted ALOHA in term of delay and throughput. Keywords: MAC, M2M, Slotted ALOHA, LoRa-WAN, IoT, SIC

Exploiting Capture Diversity for Performance Enhancement of ALOHA-Based Multi-Static Backscattering Systems in the 6G Perspective

In this paper, we consider the emerging context of ALOHA-based multi-static backscattering communication systems. By assuming an architecture consisting of a set of passive backscattering nodes, an illuminator, and a set of spatially dislocated receivers, we firstly propose a cross-layer framework for performance analysis. The model jointly accounts for the shared wireless channel, including fading and capture effect, and channel contention strategy, which is regulated by a Framed Slotted ALOHA protocol. Furthermore, based on the inherent macroscopic diversity offered by the multi-static settings, we introduce the concept of capture diversity, which is shown to enable multiple packet detection in slots with multiple transmissions. In order to characterize the multiple access interference and approximate the capture probabilities, we enforce a log-normal approximation of the inverse Signal-to-Interference Ratio that relies on moment matching. Numerical results show the impact of deployment scenarios and the relative positions of illuminator, backscattering nodes, and receivers on the system normalized throughput. We show how the number of detection points impacts the system performance under various channel conditions. Moreover, the accuracy of the proposed approximation rationale is validated via Monte Carlo simulations. Finally, we analyze the optimal frame length in the presence of capture diversity.

Performance Evaluation of Slotted Aloha Anti-Collision Protocol for Mobile RFID Tags Identification using NHPP

Radio Frequency Identification(RFID) plays an important role in identifying objects in evolving field oftheinternet of things (IoT).One important issue relates totheidentification of RFIDs. Despite wide research on this topic, not much work is performedin case when objects with RFID tags are mobile. The paperpresents a simulation-based study, employing non-homogeneous Poisson process to model variable number of tags in an interrogation area,to analyze the performance of the slotted aloha anti-collision protocol in themobile RFID tags identification. It is observedthat the maximum throughput of the protocol reduces as the number of tags increases, however, the throughput usually remains higher than that of aloha protocol in static environment.These results will help in developing better probabilistic anti-collision protocols for dynamic environment in future.

Underwater MANETs: A Specialized Protocol (RANR) for Routing the Packet

Underwater remote communication can beuseful for submerged condition observation, Communication between the boats, vessel sinking investigation, and research and so on. In any case, unliketerrestrial remote correspondence, submerged wirelesscommunication ought to consider factors like, long propagationdelay, constrained and unconstrained transmission limit, error rate due to external and internal influence, flow control, throughput, performance attenuation etc., by virtue of the characteristic properties of water. Along these lines, in this, we propose a proper protocol that applies to correspondence in underwater conditions.We additionally check performance issues in theproposed system.This paper depicts Region Attentive NeighborRouting (RANR), improvised version of the dynamic source routing (DSR) and aintegration of PURE ALOHA protocol with handshaking MAC protocol. The proposedprotocol is required as a result of the interesting challenges ofunderwater data delivery or communication: radio links doesn't effects in the water, and the acoustic links that are utilized rather have a lot of lower information rates and greater delay. RANR describes how a proposed protocol performs better than the existing protocols.