Railway cognitive radio to enhance safety, security, and performance of positive train control: final report /
| Title | : | Railway Cognitive Radio to Enhance Safety, Security, and Performance of Positive Train Control: Final Report |
| Author | : | U.S. Department of Transportation |
| Language | : | en |
| Rating | : | 4.90 out of 5 stars |
| Type | : | PDF, ePub, Kindle |
| Uploaded | : | Apr 13, 2021 |
Read Railway Cognitive Radio to Enhance Safety, Security, and Performance of Positive Train Control: Final Report - U.S. Department of Transportation | PDF
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Finite-state markov wireless channel modeling for railway tunnel environments[j].
The three key technologies of moving block, cognitive radio for train-to-train (cr-t2t), and combined positioning were introduced. A system scheme for the overall structure of the ngctcs, a train-centric train control system based on combined position technology, and cr-t2t were proposed in this study.
In the conventional system without cognitive radio, the frequency band f1 cannot be utilized by any user at any location. Thus, cognitive radio allows users to utilize a frequency band more densely in time and space, thereby leading to a drastic increase of the total spectrum efficiency.
Examples include communications for high-speed trains, drones and industrial machinery and autonomous car networks.
As the cognitive radio moniker suggests, the emphasis on these techniques is for the radio to adapt to its environment. The thinking person's radio cognitive radio (cr) [1], [2] has been consequently proposed to solve the inefficiency in spectrum assignments of legacy static radio.
Machine learning techniques for cooperative spectrum sensing in cognitive radio networks.
Jan 5, 2016 ger railways high speed wireless network capabilities. Cognitive radio (cr) can significantly improve the net- work performance, while.
The rail-cr cognitive radio will enhance the performance of railway communications in terms of interoperability, robustness, reliability, and spectral efficiency, and will make it cost-effective to deploy and maintain.
Reconfigurable radio systems (rrs) is a generic concept based on technologies such as software reconfiguration through radio applications and cognitive radio (cr) whose systems exploit the capabilities of reconfigurable radio and networks for self-adaptation to a dynamically-changing environment with the aim of improving supply chain, equipment and spectrum utilization.
Apr 29, 2020 spectrum sensing plays a vital role in cognitive radio networks (crns) for identifying the spectrum hole.
Considering the growing congestion on roads and at airports worldwide, there is a need to improve the reliability of high-speed rail (hsr) transport. Hsr is one of the important developments in rail transportation as it can sufficiently increase mobility whilst providing speed, reliability, comfort and safety.
The application of highly mobile cognitive radio technology may address this challenge. This paper first analyzes the physical structure of the existing railway wireless communication network, and determines the characteristics of chainlike distribution and cascade operation of the base stations along the railway.
Multi-tiered cognitive radio network for positive train control operations as a key security enhancement to the standard architecture for cognitive radio.
Cognitive radio (cr) is an intelligent wireless communication system which can dynamically adjust the parameters to improve system performance depending on the environmental change and quality of service. The core technology for cr is the design of cognitive engine, which introduces reasoning and learning methods in the field of artificial intelligence, to achieve the perception, adaptation.
Wireless cognitive radio (cr) over urban rail transit is a newly emergingparadigm that attempts to opportunistically transmit in licensed frequencies, without affecting the preassignedusers of these bands. To enable this functionality, such a radio must predict its operationalparameters, such as transmit power and spectrum.
Cognitive radio a cognitive radio is a software defined radio that has the ability to change its configuration based on information about its environment. According to [2], a cognitive radio has three key aspects: observation, reconfiguration and cognition.
Accommodating this demand through better resource management and improved transmission technologies.
Crs depends on the way each node contribute to this enhanced protocol.
It is shown that information exchange between cognitive radios enhance the probability of detection of the primary user.
These activities are conducted in parallel to a measurement campaign in a real railway environment, aiming to collect data about the radio coverage and to define the kpi for each single bearer. On this basis the field testing verification and design review phase can follow, along with some dissemination activities, reaching the last milestone.
Cognitive radio for high speed railway through dynamic and opportunistic spectrum reuse. The integration of all the heterogeneous wireless networks deployed along european railway lines constitutes a key technical challenge to improve global efficiency of railway system. Emerging cognitive radio (cr) technologies can answer this challenge.
To improve spectrum utilization efficiency, spectrum sharing in the context of cognitive radio networks (crns) has been widely regarded as a promising and cost-effective solution. In the past two decades, crns have received a large amount of research efforts and produced many cognitive radio schemes.
This paper discusses a railway specific cognitive radio that builds upon software defined radio (sdr) platforms to adapt the radio based situational awareness. Cognitive radio incorporates artificial intelligence based algorithms with reconfigurable software-defined radios that enable automatic adjustments of the radio to improve performance.
This article describes an effort toward developing a railroad-specific cognitive radio (rail-cr) that can meet the needs of future wireless communication systems for railways by making positive train control (ptc) communication more interoperable, robust, reliable, spectrally efficient, and less costly to deploy and maintain.
In recent years, cognitive radio [9] [15] [22] has attracted intensive research because of pressing demand of efficient fre-quency spectrum usage. In a cognitive radio system, secondary radio users try to find ‘blank spaces’, in which the licensed frequency band is not being used by primary radio users, for communications.
In 1994, etsi gsm standard was selected by uic as the bearer for first digital railway radio communication system.
Cognitive radio presents the possibility of numerous revolutionary applications, foremost of which is opportunistic spectrum utilization. Jeffrey reed to speed the transition of cognitive radio from the laboratory to living room.
Current research into cognitive radios hopes to improve spectral utilization by allowing users from crowded bands to bleed off into nearby empty bands. In an ideal scenario a spectrum aware cognitive radio is able to sense the local spectrum usage and adapt its own radio parameters accordingly.
Cognitive radio for railway through dynamic and opportunistic spectrum reuse (corridor) is a french research project that targets opportunistic spectrum access for railways. Communication demands are increasing for modern railways from the point of view of railway operations as well as for providing internet connectivity to the passengers.
Abstract: wireless communication plays a vital role in the success of railroad operations. This article describes an effort toward developing a railroad-specific cognitive radio (rail-cr) that can meet the needs of future wireless communication systems for railways by making positive train control (ptc) communication more interoperable, robust, reliable, spectrally efficient, and less costly.
A cognitive radio is an intelligent and reconfigurable wireless communication system that enables monitoring the radio environment, learning, and accordingly, adapting transmission parameters in order to achieve the optimal spectrum utilization. Learn more in: interference statistics and capacity-outage analysis in cognitive radio networks.
Full duplex and cognitive radio technologies have paved the way to enormous advances in wireless communications. Cognitive radio, since 1990s, has predicted transceivers that can be aware of their surroundings and be able to detect and exploit underutilized frequency bands licensed to other users.
Cognitive radio high speed train geostationary earth orbit satellite solution technological survey.
Ieee journal on selected areas in communications, 2005, 23(2): 201-220. Cognitive radio for high speed railway through dynamic and opportunistic spectrum reuse[j].
Abstractcognitive radio directs at amplifying the use of the limited radio bandwidth while accommodating the increasing number of services and applications in wireless networks. Secondary users (su) should be able to exploit the radio spectrum that is unused by the primary network.
In the french research project corridor [19, 20], dealing with cognitive radio for railway applications, the overall architecture of a communication system was designed, making the best use of cognitive radio. The proposed solution is a crosslayer architecture for interacting with heterogeneous radio access technologies.
Cognitive radio nodes opportunistically exploit the licensed railway stations 13 improve the revenue generation.
Figure 1: networks architecture for the high-speed rail communication system. From individual user’s high-speed movement along the rails and the inefficiency in the spectrum usage. In recent years, a lot of researchers used cognitive radio (cr) to improve the performance of wireless communication.
This chapter presents the challenges and perspectives for the future broadband wireless communications for railway. First of all, a section is dedicated to the next generation broadband technologies, such as cognitive radios and 5g technologies.
The application of cognitive radio is becoming a cutting-edge research field in railway wireless communication. This paper first analyzes the physical infrastructure of the railway wireless communication network and determines base station as the key communication node in the railway environment, which can implement the cognitive radio technology.
Cognitive radio (cr) is an effective solution to improve the spectral efficiency (se) of wireless communications by allowing the secondary users (sus) to share spectrum with primary users. Meanwhile, intelligent reflecting surface (irs), also known as reconfigurable intelligent surface (ris), has been recently proposed as a promising approach to enhance energy efficiency (ee) of wireless.
Applying cognitive radio in the railway communication systems is a cutting-edge research area. The rapid motion of the train makes the spectrum access of the railway wire-less environment instable. To address the issue, first we formulate the spectrum management of railway cognitive radio as a distributed sequential decision problem.
Cognitive radio (cr) is an adaptive radio technology that can automatically detect available channels in a wireless spectrum and change transmission parameters to improve the radio operating behavior. A cr ad-hoc network (crahn) should be able to coexist with primary user (pu) systems and other cr secondary systems without causing harmful interference to licensed pus as well as dynamically.
The application of cognitive radio is becoming a cutting-edge research field in improve the probability of successful data transmission in the railway wireless.
A cognitive radio (cr) is a radio that can be programmed and configured dynamically to use to operate in the best available frequency band, maintaining seamless communication requirements during transitions to better spectrum.
We show that by allowing the cognitive users operating in the same band to cooperate we can reduce the detection time and thus increase the overall agility. We first consider a two-user cognitive radio network and show how the inherent asymmetry in the network can be exploited to increase the agility.
May 8, 2000 rapid-prototype cognitive radio, cr1, was developed to apply these mathematical learning techniques that enhance robustness to rapidly- changing items in parenthesis such as (rail, ship) may be relevant to the topic.
Applying cognitive radio in the railway communication systems is a cutting-edge research area. The rapid motion of the train makes the spectrum access of the railway wireless environment instable. To address the issue, first we formulate the spectrum management of railway cognitive radio as a distributed sequential decision problem.
In a cognitive radio network, cooperative communications between a primary user (pu) and a second user (su) may be able to significantly improve the spectrum utilization, and thus, the network performance. To be specific, the pu can select a number of sus as its relays to cooperatively transmit its data. In turn, these relays can be granted access to the licensed channel of the pu to transmit.
What is cognitive radio? cognitive radio networks, like xg’s xmax system, represent an innovative approach to wireless engineering in which radios are designed with an unprecedented level of intelligence and agility cognitive radios are able to monitor, sense, and detect the conditions of their operating environment, and dynamically.
Robust, reliable, and interoperable wireless communications play a vital role in the success of railroad operations. This paper describes an effort towards developing a railroad-specific “cognitive radio ” (rail-cr) that can meet the needs of future wireless communication systems for railways by making positive train control (ptc) communication more interoperable, robust.
A wireless network is able to recognize every possible parameter clear. 2) spectrum-sensing cognitive radio: the channels are detected from the available frequency spectrum. Other types are dependent on parts of the spectrum available for cognitive radio: 3) licensed-band cognitive radio.
This article discusses software radio in a public safety application, but expand on the application to take advantage of the flexibility and adaptability of software.
3 cognitive radio architecture a cognitive radio network consists of primary networks as well as secondary networks. A primary network comprises of one or more pus and one or more primary base stations. The pus are licensed to use the spectrum and are coordinated by the primary base stations.
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