scholarly journals Fairness Oriented Neighbor-Channel-Aware MAC Protocol for Airborne Sensor Networks

2017 ◽  
Author(s):  
Xiaolin Gao ◽  
Jian Yan ◽  
Jianhua Lu
Keyword(s):  
Sensor Networks ◽  
Mac Protocol ◽  
Traffic Load ◽  
Media Access Control ◽  
Media Access ◽  
Traffic Loading ◽  
Protection Mechanism ◽  
Traffic Loads ◽  
The Media ◽  
Inter Frame

In airborne sensor networks (ASNs), the media access control (MAC) protocol is facing with serious unfairness problem due to the traditional protection mechanism of air-to-air communications among aircrafts. Actually by using the binary exponential back-off algorithm at high traffic loads to minimize collisions among users, the latest successful node can always benefit from this kind of MAC to obtain channel resources. Moreover, when taking the existence of the hidden nodes in ASNs into account, the inaccurate traffic load information will further aggravate the system’s unfairness. In this paper, a neighbor-channel-aware (NCA) protocol is proposed to improve the fairness of MAC protocol in ASNs. In the proposal, the NCA frame is firstly added and exchanged between neighbor nodes periodically, which helps to resolve the inaccurate traffic load information, so as to avoid reducing the probability of successful message transmission. Then a traffic-loading based back-off algorithm is involved to make the neighbor nodes cooperatively adjust the inter-frame space (IFS) interval to further reduce the unfairness. The simulation results show that, the proposed MAC protocol can guarantee the satisfied fairness, simultaneously avoiding heavy network overloads to protect key messages’ successful transmissions in ASNs.

scholarly journals Virus Propagation in Wireless Sensor Networks with Media Access Control Mechanism

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Lurong Jiang ◽  
Qiaoyu Xu ◽  
Hangyi Pan ◽  
Yanyun Dai ◽  
Jijun Tong
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Access Control ◽  
Control Mechanism ◽  
Wireless Sensor ◽  
Media Access Control ◽  
Media Access ◽  
Virus Propagation ◽  
Suppression Effect ◽  
The Media

In wireless sensor networks, network security against virus propagation is one of the challenges with the applications. In severe cases, the network system may become paralyzed. In order to study the process of virus propagation in wireless sensor networks with the media access control mechanism, this paper uses the susceptible-infectious-removed (SIR) model to analyze the spreading process. It provides a theoretical basis for the development of virus immune mechanisms to solve network virus attack hidden dangers. The research shows that the media access control (MAC) mechanism in the wireless sensor network can inhibit the process of virus propagation, reduce the network virus propagating speed, and decrease the scale of infected nodes. The listen/sleep duty cycle of this mechanism will affect the suppression effect of virus propagation. The smaller the listen/sleep duty cycle, the stronger the suppression effect. Energy consumption has a peak value under specific infection probability. Meanwhile, it is also found that the spreading scale of the virus in wireless sensor networks can be effectively inhibited by the MAC mechanism.

scholarly journals A QoS Based Adaptive Backoff Scheme for Vehicular Ad Hoc Networks

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4421 ◽  
Author(s):  
Tianjiao Zhang ◽  
Qi Zhu
Keyword(s):  
Ad Hoc Networks ◽  
Network Performance ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Intelligent Transportation System ◽  
Mac Protocol ◽  
Media Access Control ◽  
Media Access ◽  
The Media ◽  
Hoc Networks

The media access control (MAC) protocol is a key element in the design of vehicular ad hoc networks (VANETs) that directly affects the network performance. The backoff schemes of existing MAC protocols apply the single backoff process and therefore are not suitable for multi-class data transmission. Additionally, they cannot satisfy the delay requirements of emergency data in the case of varying number of vehicles, causing an adverse effect to the intelligent transportation system (ITS). This paper presents a priority-based adaptive backoff scheme that can enhance the binary exponential backoff (BEB) algorithm as well as the polynomial backoff (QB) algorithm. This system distinguishes priority data with different delay requirements first and designs different backoff schemes for each type of data later. The two-dimensional Markov Chain is used to analyze the backoff scheme and determine the expressions for throughput and delay. The simulation results show that the backoff scheme provided by this paper can reduce the average data delay and regulate each kind of data delay adaptively, according to the varying number of vehicles and different delay requirements.

scholarly journals Full-Duplex MAC Protocol for CSMA/CA-Based Single-Hop Wireless Networks

Sensors ◽  
2019 ◽  
Vol 19 (10) ◽  
pp. 2413 ◽  
Author(s):  
Yu Song ◽  
Wangdong Qi ◽  
Weiwei Zhao ◽  
Wenchi Cheng
Keyword(s):  
Mac Protocol ◽  
Transmission Probability ◽  
Full Duplex ◽  
System Throughput ◽  
Media Access Control ◽  
Media Access ◽  
Half Duplex ◽  
Long Time ◽  
The Media ◽  
The One

Full-duplex (FD) communication provides new opportunities for improving the throughputs of networks. However, this condition means that the number of senders increases from one to two within a certain range. We have to arrange the two nodes to send frames simultaneously in the media access control (MAC) layer. For the single-hop network model, using the FD features of the nodes and the cut-through mechanism, we propose an FD MAC protocol. The protocol improves the throughput of the network from the following two aspects. On the one hand, during the transmission of each node, based on the information of the received frame’s header, the protocol can detect collisions in the network, preventing the channel from being ineffectively occupied for a long time. On the other hand, the protocol can provide the FD with as many opportunities as possible for the nodes. According to the working process of the protocol, we modeled the states (“active” and “passive” transmission, back-off) of each node and their transitions to a Markov chain. We solved the “active” transmission probability of the node and further modeled the analytical performance of the protocol. The simulation results showed that the system throughput produced by our protocol was at least twice that of the conventional CSMA/CA protocol used in the half-duplex networks.

scholarly journals A Novel QoS-Aware A-MPDU Aggregation Scheduler for Unsaturated IEEE802.11n/ac WLANs

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1203 ◽  
Author(s):  
Cong Lu ◽  
Bin Wu ◽  
Tianchun Ye
Keyword(s):  
Real Time ◽  
Mac Protocol ◽  
Local Area ◽  
Media Access Control ◽  
Delay Model ◽  
Media Access ◽  
Data Rates ◽  
The Media ◽  
Qos Performance ◽  
The Impact

Improving the quality of service (QoS) performance to support existing and upcoming real-time applications is critical for IEEE 802.11n/ac devices. The mechanisms of the media access control (MAC) layer, including the aggregate MAC protocol data unit (A-MPDU) aggregation, greatly affect the QoS performance in wireless local area networks (WLANs). To investigate the impact of the aggregation level on the QoS performance for real-time multimedia applications, a novel end-to-end delay model for the unsaturated settings is proposed in this paper. The presented model considers the gathering procedure of packets, queuing behaviors, and transmissions using the RTS/CTS (request to send/clear to send) mechanism on error-prone channels. Based on the model, a novel QoS-aware A-MPDU aggregation scheduler for IEEE802.11n/ac WLANs was shown to obtain better QoS performance with lower latency and less packet loss, a larger capacity to hold higher data rates, and more working nodes. The validation of the proposed model and the promotion of the proposed scheduler are well benchmarked by ns-3.

A Cooperative MAC Scheduling Scheme for Underwater Sensor Networks

2013 ◽  
Vol 295-298 ◽  
pp. 903-908 ◽  
Author(s):  
Khoa Thi Minh Tran ◽  
Seung Hyun Oh
Keyword(s):  
Sensor Networks ◽  
Mac Protocol ◽  
Propagation Delay ◽  
Sensor Nodes ◽  
Media Access Control ◽  
Underwater Sensor Networks ◽  
Media Access ◽  
Acoustic Sensor Networks ◽  
Data Message ◽  
Cooperative Mac

The long propagation delay in underwater acoustic sensor networks renders existing media access control (MAC) protocols for terrestrial wireless networks undesirable. In this paper, we propose a new cooperative MAC protocol for underwater sensor networks that is used to detect objects and monitoring the environment. Our proposed MAC protocol tries to prevent data collisions through short term scheduling among neighbor nodes with exchange of short data message. By adapting the all sensor nodes to the transmitting schedules in which time is optimized we can minimize the collision rate between nodes. Through simulations, we show our proposed protocol can minimize data collisions and not only offers a higher throughput, but also indicates a better end-to-end delay.

scholarly journals Energy management in sensor networks

2012 ◽  
Vol 370 (1958) ◽  
pp. 52-67 ◽  
Author(s):  
John A. Stankovic ◽  
Tian He
Keyword(s):  
Energy Consumption ◽  
Sensor Networks ◽  
Energy Management ◽  
Large Scale ◽  
Energy Savings ◽  
Time Synchronization ◽  
Media Access Control ◽  
Media Access ◽  
Energy Aware ◽  
Holistic View

This paper presents a holistic view of energy management in sensor networks. We first discuss hardware designs that support the life cycle of energy, namely: (i) energy harvesting, (ii) energy storage and (iii) energy consumption and control. Then, we discuss individual software designs that manage energy consumption in sensor networks. These energy-aware designs include media access control, routing, localization and time-synchronization. At the end of this paper, we present a case study of the VigilNet system to explain how to integrate various types of energy management techniques to achieve collaborative energy savings in a large-scale deployed military surveillance system.

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