scholarly journals Quality of service improvement for high-speed railway communications

2014 ◽  
Vol 11 (11) ◽  
pp. 156-167 ◽  
Author(s):  
Zhou Yuzhe ◽  
Ai Bo
Keyword(s):  
Quality Of Service ◽  
High Speed ◽  
Service Improvement ◽  
High Speed Railway

Joint Access Control Based on Access Ratio and Resource Utilization for High-Speed Railway Communications

Frequenz ◽  
2015 ◽  
Vol 69 (5-6) ◽  
Author(s):  
Yuzhe Zhou ◽  
Bo Ai
Keyword(s):  
Quality Of Service ◽  
Access Control ◽  
Resource Utilization ◽  
High Speed ◽  
High Speed Railway ◽  
Broadband Wireless ◽  
Control Scheme ◽  
Fast Development ◽  
Optimal Resource

AbstractThe fast development of high-speed rails makes people’s life more and more convenient. However, provisioning of quality of service of multimedia applications for users on the high-speed train is a critical task for wireless communications. Therefore, new solutions are desirable to be found to address this kind of problem. Current researches mainly focus on providing seamless broadband wireless access for high-speed mobile terminals. In this paper, an algorithm to calculate the optimal resource reservation fraction of handovers is proposed. A joint access control scheme for high-speed railway communication handover scenario is proposed. Metrics of access ratio and resource utilization ratio are considered jointly in the analysis and the performance evaluation. Simulation results show that the proposed algorithm and the scheme improve quality of service compared with other conventional schemes.

scholarly journals Writing a project proposal: addendum to development of diabetes register series

2019 ◽  
Vol 7 (1) ◽  
pp. 377
Author(s):  
Ezekiel U. Nwose
Keyword(s):  
Quality Of Service ◽  
Healthcare System ◽  
Healthcare Service ◽  
Income Country ◽  
Service Improvement ◽  
Service Needs ◽  
Project Proposal ◽  
Diabetes Register

The summary of the series on development of diabetes register in low-mid income country indicated that there is capacity for diabetes services in every hospital, but quality of service needs to improve at all tiers of the healthcare system. The “need to develop proposal for healthcare service improvement” was highlighted.

scholarly journals A Secure Optimization Algorithm for Quality-of-Service Improvement in Hybrid Wireless Networks

2021 ◽  
Vol 3 (1) ◽  
pp. 1-10
Author(s):  
Smys S ◽  
Wang Haoxiang
Keyword(s):  
Wireless Networks ◽  
Quality Of Service ◽  
Optimization Algorithm ◽  
Communication Systems ◽  
Data Transfer ◽  
Mesh Networks ◽  
Service Improvement ◽  
Complex Data ◽  
Hybrid Wireless Networks

Various industrial, scientific and commercial processes involve wireless mesh networks in the recent days. These technologies improve communication technology to a large extent which has led to an increase in utilization of these systems in various fields. In application with intense and complex data flow, improving the quality of service (QoS) has been a challenge and a focus of research leading to more advanced wireless communication systems. This paper provides a novel optimization algorithm for improving the QoS in hybrid wireless networks while preventing malware and routing attacks. The concept of QoS and hybrid wireless networks are examined at the initial stage. Further, the algorithm for optimizing the service quality in the network is proposed accordingly. The ability of data transfer is benefited by data packets in this algorithm. Load distribution is performed such that overcrowding is prevented and information routing is done efficiently though the nodes. Delay or routing is created and control messages are sent for withholding data when certain nodes are overcrowded. This reduces the delay created by overcrowding by 50% while maintaining the permittivity.

scholarly journals A Fast Hybrid Beamforming Scheme for High-Speed Railway Communications

Electronics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 998
Author(s):  
Yu Xiao ◽  
Gang Qiu ◽  
Yafeng Wang
Keyword(s):  
High Speed ◽  
Low Complexity ◽  
Spectrum Efficiency ◽  
System Throughput ◽  
Quality Of Services ◽  
Communication Service ◽  
High Speed Railway ◽  
High Speed Trains ◽  
Hybrid Beamforming

With the increasingly demand for reliable mobile communication service in the high-speed railway (HSR) system, the service stability of HSR communication is of great concern in recent research. Focusing on ensuring the quality of services (QoS) and system throughput, massive multi-input multi-output (massive MIMO) and beamforming technologies have been widely applied. In this paper, aiming to minimize the communication outage probability (OP) and not to decrease spectrum efficiency (SE) too much, we propose a fast HBF (F-HBF) scheme for HSR communications. The proposed scheme uses a low-complexity beam-searching algorithm to trace high-speed trains in real time. The simulation results verify that the proposed scheme can significantly reduce OP without too much SE degradation.

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