reliable communication
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2022 ◽  
pp. 226-239
Author(s):  
Onur Ugurlu ◽  
Nusin Akram ◽  
Vahid Khalilpour Akram

The new generation of fast, small, and energy-efficient devices that can connect to the internet are already used for different purposes in healthcare, smart homes, smart cities, industrial automation, and entertainment. One of the main requirements in all kinds of cyber-physical systems is a reliable communication platform. In a wired or wireless network, losing some special nodes may disconnect the communication paths between other nodes. Generally, these nodes, which are called critical nodes, have many undesired effects on the network. The authors focus on three different problems. The first problem is finding the nodes whose removal minimizes the pairwise connectivity in the residual network. The second problem is finding the nodes whose removal maximizes the number of connected components. Finally, the third problem is finding the nodes whose removal minimizes the size of the largest connected component. All three problems are NP-Complete, and the authors provide a brief survey about the existing approximated algorithms for these problems.


Author(s):  
Saptarshi Ghosh ◽  
Tasos Dagiuklas ◽  
Muddesar Iqbal ◽  
Xinheng Wang

Carbon ◽  
2022 ◽  
Author(s):  
Federico Calì ◽  
Luca Fichera ◽  
Giuseppe Trusso Sfrazzetto ◽  
Giuseppe Nicotra ◽  
Gianfranco Sfuncia ◽  
...  

2021 ◽  
Author(s):  
Luan Lucas Lourenco ◽  
George Oliveira ◽  
Patricia Della Mea Plentz ◽  
Juha Roning

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 8064
Author(s):  
Binod Kharel ◽  
Onel Luis Alcaraz López ◽  
Hirley Alves ◽  
Matti Latva-aho

This paper focuses on edge-enabled cloud radio access network architecture to achieve ultra-reliable communication, a crucial enabler for supporting mission-critical machine-type communication networks. We propose coordinated multi-point transmission schemes taking advantage of diversity mechanisms in interference-limited downlink cellular networks. The network scenario comprises spatially distributed multiple remote radio heads (RRHs) that may cooperate through silencing, or by using more elaborated diversity strategies such as maximum ratio transmission or transmit antenna selection to serve user equipment in the ultra-reliable operation regime. We derive an exact closed-form expression for the outage probabilities and expected values of signal-to-interference ratio for silencing, transmit antenna selection and maximum ratio transmission schemes. We formulate rate control and energy efficiency under reliability constraints to test the performance and resource usage of the proposed schemes. Furthermore, we study the impact on average system sum throughput with throughput-reliability trade-off under cooperative communication. Extensive numerical analysis shows the feasibility of ultra-reliable communication by implementing diversity schemes with RRHs cooperation.


Author(s):  
P.C. Prabhu Kumar ◽  
P. Penchala Prasanth ◽  
P. Hemalatha ◽  
Karthik J Kulakarni

A fully automated house must ensure all the appliances must be connection and provide a smart way of working for the human. The insight of Internet of Things (IoT) network provision the necessary platform to implement the automated home. The proposed system emphasizes, how all the appliances would be connected to IoT to ensure fully automated home. In this framework the smart home has been divided into various areas like smart kitchen, smart gardening, home safety and security system, and smart lightning system. The reliable protocol stack has been utilized to provide efficient communication along with proper security measures. The reliable protocol suite works on top of MQTT and TCP to ensure reliable communication. The smart gateway utilized for this framework and provides firewall security as with a two-phase filtering mechanism as well as scalability. among all the appliances in the home.


Mobile ad hoc networks as an infrastructure free, and constrained resource environment network. The network aim is to establish internet connectivity everywhere regardless of location. The applications of network are healthcare, disaster relief and military, where reliable communication is major concern. Communication in the network is initiated by establishing the communication route between source and destination and sending the information through it. One of the characteristics of MANETs is a peer-to-peer network, where intermediate nodes have to cooperate for reliable communication by acting as routers. In literature number of routing protocols have been designed based on the MANET’s peer to peer characteristic. However, it may not be every time true that the intermediate nodes act as faithful routers, and they may untrustworthy either due to malicious behavior or bottleneck. Number of secure protocols have been designed to mitigate malicious behavior by neglecting the bottleneck. The paper aims to define the bottleneck, and its importance in communication. Finally, how bottleneck influence on the MANETs performance during malicious nodes mitigation


2021 ◽  
Author(s):  
Xiangyu Xu ◽  
Jianfei Peng

The smart city is an emerging notion that is leveraging the Internet of Things (IoT) technique to achieve more comfortable, smart and controllable cities. The communications crossing domains between smart cities is indispensable to enhance collaborations. However, crossing-domain communications are more vulnerable since there are in different domains. Moreover, there are huge different devices with different computation capabilities, from sensors to the cloud servers. In this paper, we propose a lightweight two-layer blockchain mechanism for reliable crossing-domain communication in smart cities. Our mechanism provides a reliable communication mechanism for data sharing and communication between smart cities. We defined a two-layer blockchain structure for the communications inner and between smart cities to achieve reliable communications. We present a new block structure for the lightweight IoT devices. Moreover, we present a reputation-based multi-weight consensus protocol in order to achieve efficient communication while resistant to the nodes collusion attack for the proposed blockchain system. We also conduct a secure analysis to demonstrate the security of the proposed scheme. Finally, performance evaluation shows that our scheme is efficient and practical.


Complexity ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Hui Luo ◽  
Quan Yin

Driven by the development of the Internet industry, mobile robots (MRs) technology has become increasingly mature and widely used in all walks of life. Since MRs are densely distributed in the network system, how to establish a reliable communication architecture to achieve good cooperation and resource sharing between MRs has become a research hotspot. In this respect, mobile edge computing (MEC) technology and millimeter wave (mmW) technology can provide powerful support. This paper proposes a mmW communication network architecture for distributed MRs in MEC environment. The mmW base station provides reliable communication services for MRs under the coverage of information cloud (IC). We design a joint resource and power allocation strategy aimed at minimizing network energy consumption. First, we use the Lyapunov optimization technique to transform the original infinite horizon Markov decision process (MDP) problem. Then, a semidistributed algorithm is introduced to solve the distributed optimization problem in the mmW network. By improving the autonomous decision-making ability of the mmW base station, the signaling overheads caused by information interaction are reduced, and information leakage is effectively avoided. Finally, the global optimal solution is obtained. Simulation results demonstrate the superiority of the proposed strategy.


2021 ◽  
pp. 223-227

INTRODUCTION: Communication and information exchange are of great importance in order to coordinate crisis management in an emergency and rescue processes. Therefore, the attainment of a strong, complete, and stable communication infrastructure will be among the vital factors for providing an appropriate response to emergencies. The use of new technologies that seem to ensure reliable communication and information exchange must be constantly evaluates. METHODS: This review study searched articles published from 2000 to 2021 in Persian and English regarding blockchain technology applications in such databases as Google Scholar, Science Direct, and PubMed using keywords, including rescue, blockchain, and crisis management. FINDINGS: Accurate and optimal presentation of information is an essential prerequisite for crisis management in response to disasters due to the significant impact of each role-maker's decisions. Innovative blockchain technology is extensively used in various fields and is usually well-known and popular for its decentralized and distributed organization and leadership. CONCLUSION: In general, blockchain technologies have shown success in reducing logistics, support, executive, and management costs in different areas. Crisis management in emergencies and disaster response can be significantly improved by the implementation of blockchain technologies. In addition, studies show that the implementation of blockchain technology in crisis management during an emergency and rescue processes is very complex and requires a great deal of cooperation from all parties. However, it will be effective in practice.


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