Access control schemes for high-speed train communications

Zhou, Yuzhe; Ai, Bo

doi:10.1109/hmwc.2014.7000209

Cited by 5 publications

(4 citation statements)

References 12 publications

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“…In the scenario of mobile network coverage on high-speed rail, due to the relative movement between the source of signals transmitted and the high-speed trains, the frequency of signals received by passengers on the train is different from that of the source signal, hence causing a Doppler frequency offset [4] , as shown in Table 1.…”

Section: Doppler Frequency Offsetmentioning

confidence: 99%

4G and 5G fusion coverage over China high-speed rail

Zhao

2023

Second International Conference on Electronic Information Engineering and Computer Communication (EIECC 2022)

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In China, 4G and 5G networks have been maturely applied to high-speed rail scenarios, and the user experience of networks on high-speed rail has been further improved. The critical issues of wireless communication coverage on high-speed rail have been solved with key technologies, including Doppler frequency offset fixed by shift correction and compensation algorithm, frequent switching of networks solved by the exclusive network coverage method and cell combination technology, and car body attenuation resolved by combining multiple frequency networks and prioritizing low frequency. This paper analyzed such key technologies and verified their effects on problem-solving via tests. With the popularization of high-speed rail, new problems have emerged in the communication field, such as complex networks with multiple formats and multiple frequencies, the influence induced by exclusive network coverage for high-speed rail, and the problem of insufficient capacity. This paper explored two topics, namely the breakpoint issue and capacity problem of the exclusive network when trains pass each other on high-speed rail, and proposed a solution of 4G and 5G fusion coverage to achieve continuous coverage at breakpoints and equalize capacity resources, which expanded the application of 5G on the basis of fully harnessing the 4G network.

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Section: Doppler Frequency Offsetmentioning

confidence: 99%

4G and 5G fusion coverage over China high-speed rail

Zhao

2023

Second International Conference on Electronic Information Engineering and Computer Communication (EIECC 2022)

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“…Based on the admission level, the admission control schemes can be classified into the call-level admission control and the packet-level admission control. Traditional admission control schemes only consider call-level performance and are mainly designed for circuit-switched GSM-R system [43,[67][68][69][70][71][72]. Since LET-R will become a packet-switched system, the packet-level features could be explored to improve the system performance [26].…”

Section: ) Level-based Admission Controlmentioning

confidence: 99%

“…The literature [69] proposes joint admission control and handover policies in an integrated satellite-terrestrial architecture, and the proposed policies aim to increase both the user satisfaction and the resource utilization. Another handoverbased admission control scheme is proposed in [70], where a position-based factor is introduced to reserve more resources to accept handover calls. With the help of the handover location information, the resource reservation scheme divides the system resources for handover calls and new calls, respectively.…”

Section: ) Handover-based Admission Controlmentioning

confidence: 99%

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A survey on high-speed railway communications: A radio resource management perspective

Zhu

et al. 2016

Computer Communications

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High-speed railway (HSR) communications will become a key feature supported by intelligent transportation communication systems. The increasing demand for HSR communications leads to significant attention on the study of radio resource management (RRM), which enables efficient resource utilization and improved system performance.RRM design is a challenging problem due to heterogenous quality of service (QoS) requirements and dynamic characteristics of HSR wireless communications. The objective of this paper is to provide an overview on the key issues that arise in the RRM design for HSR wireless communications. A detailed description of HSR communication systems is first presented, followed by an introduction on HSR channel models and characteristics, which are vital to the cross-layer RRM design. Then we provide a literature survey on state-of-the-art RRM schemes for HSR wireless communications, with an in-depth discussion on various RRM aspects including admission control, mobility management, power control and resource allocation. Finally, this paper outlines the current challenges and open issues in the area of RRM design for HSR wireless communications.

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