English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In the last 25-30 years, wireless communications have become an essential part of people’s lives all over the globe. Currently, commercial high data rate mobile services are pro-vided with a peak data rate of 28Mbps using a bandwidth of 5MHz. However, this peak data rate is insufficient and even higher transmission rates are already desired, especially when multiple users and multimedia traffic are considered. The development of high-speed railway makes people’s lives more and more convenient; meanwhile, it puts forward much higher requirements on high-speed railway communication services. In this paper, the wireless cellular network for high speed train is designed that can be deployed in the environment where the passengers have speed up to 500 km/h. For this purpose, two different network architectures are designed for inside and outside the train respectively. Inside the train, the MSs are connected to the wireless access point to communicate. The APs are connected to one transceiver antenna on the top of the train by wired connections. In the outside of the train the BSs for railway is designed in a different manner. The Omni-directional antennas are used for the railway BSs for less energy consumption. The coverage area of one BS is overlapped with the nearest BS as a function of the average expected speed of the train. The railways Base Stations are connected to the BSC, MSC and PSTN as like the conventional cellular system as well as there is a point to point connection line between two adjacent BSs to transfer the control information firstly. When the train passes through the overlapping area of the cells, the handoff is occur and all the controls are transferred from the previous BS to the next BS to the moving direction of the train. For a train with maximum speed of 500 km/h we use the BS antenna that can cover an area of radius 10 km. The maximum distance between the overlapped boundary, (5*138) m= 690m (5/3600= 138). So it will take 5 sec for a train to pass through the overlapping area. During this period of time, the handoff can occur smoothly.

Wireless cellular network for high speed (up to 500 km/h) vehicles