Transmission schemes for high-speed railway: Direct or relay?

5th IET International Conference on Wireless, Mobile and Multimedia Networks (ICWMMN 2013)

You

et al. 2013

In this paper, a relay-based ACK selective cooperative diversity transmission mode is proposed for high-speed railway. The primary intention of this paper is to evaluate the performance of a non-relay direct transmission mode and cooperative di versity transmission with the acknowledgment mode. What's more, the closed-form outage probabilities for each transmission mode are derived. We can conclude that the ACK relay-based cooperative diversity transmission mode has better performance as well as reliability than non-relay mode by comparing their outage probability especially in high-speed railway scenario. It is also be noted that the attenuation of signal amplitude caused by carriage passing loss is a crucial parameter in determining the outage probability for each transmission mode.

Section: Numerical and Simulation Resultsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

A Cooperative Diversity Transmission Mode based on ACK Packet Information in High-Speed Railway Network

5th IET International Conference on Wireless, Mobile and Multimedia Networks (ICWMMN 2013)

You

et al. 2013

“…The probability gap between κ = −5dB and κ = −15dB is higher than which between κ = −15dB and κ = −30dB. As shown in [8], the carriage passing loss is a key metric which significantly impact the reliability of the railway network and also is a key factor which determines the occurrence of the outage event. Our proposed optimal relay selective cooperation scheme reduces the impact of the carriage passing loss.…”

Section: Numerical and Simulation Resultsmentioning

confidence: 96%

“…In contrast, the transmission based on relays will not suffer from the carriage passing loss as the relay has its antenna inside the train. However, It is well-known that the relay based scheme will decrease the channel capacity [8] since it is relay-based half duplex and takes two phases in constraint. On the other hand, we can simply get the diversity gain by the help of the relay.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance Analysis of Optimal Relay Selective Cooperation in Railway Network

You

5th IET International Conference on Wireless, Mobile and Multimedia Networks (ICWMMN 2013)

Yang

et al. 2013

In the railway network, the fact that signal amplitude suffers loss resulted from signal traversing through the carriage which named by carriage pass loss, highly influences the reliability of the wireless communication system. In this paper, we propose an optimal relay selective cooperation (ORSC) scheme without the acknowledgment from the destination as if it succeeds in decoding or not. The main purpose of this paper is to evaluate the performance of ORSC transmission schemes. Specifically, the closed-form outage probabilities for ORSC transmission scheme are derived. By comparing obtained outage probability of ORSC with the non-cooperation transmission scheme, we find the ORSC transmission has better performance, better reliability and significantly eliminates the impact of the carriage passing loss.Index Terms-High-speed railway, outage probability, optimal relay selective cooperation, multiple relay.

Service‐based high‐speed railway base station arrangement

Wireless Communications

Fan

Dong

et al. 2013

To provide stable and high data rate wireless access for passengers in the train, it is necessary to properly deploy base stations along the railway. We consider this issue from the perspective of service, which is defined as the integral of the time-varying instantaneous channel capacity. With large-scale fading assumption, it will be shown that the total service of each base station is inversely proportional to the velocity of the train. Besides, we find that if the ratio of the service provided by a base station in its service region to its total service is given, the base station interval (i.e., the distance between two adjacent base stations) is a constant regardless of the velocity of the train. On the other hand, if a certain amount of service is required, the interval will increase with the velocity of the train. The aforementioned results apply not only to simple curve rails, like line rail and arc rail, but also to any irregular curve rail, provided that the train is traveling at a constant velocity. Furthermore, the new developed results are applied to analyze the on-off transmission strategy of base stations.