The Monthly Newsletter of IEEE Vehicular Technology Society—February 2019

 

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From the IEEE Vehicular Technology Magazine
4G/5G Spectrum Sharing: Efficient 5G Deployment to Serve Enhanced Mobile Broadband and Internet of Things Applications
Reviewed by Richard Yu, Associate EiC, VTS Mobile World

The fifth-generation (5G) has been developed for supporting diverse services, such as enhanced mobile broadband (eMBB), massive machine-type communication (mMTC) and ultrareliable lowlatency communication (URLLC). The latter two constitute Internet of Things (IoT) enablers.

The new spectrum released for 5G deployments are primarily above 3 GHz and, unfortunately, has a relatively high path loss, which limits the coverage, especially for the uplink (UL). The high propagation loss, the limited number of UL slots in a time-division duplexing (TDD) frame, and the limited user power gravely restrict the UL coverage, but this is where bandwidth is available.

Moreover, the stringent requirements of eMBB and IoT applications lead to grave 5G challenges, e.g., site planning, ensuring seamless coverage, adapting the TDD downlink (DL)/UL slot ratio and the frame structure for maintaining a low bit error rate as well as low latency, and so on.

This article addresses some of those challenges with the aid of a unified spectrum-sharing mechanism, and by means of a UL/DL decoupling solution based on fourth-generation (4G)/5G frequency sharing.

The key concept relies on accommodating the UL resources in a long-term evolution (LTE) frequency-division duplexing (FDD) frequency band as a supplemental UL (SUL) carrier in addition to the new radio (NR) operation in the TDD band above 3 GHz. With the advent of this concept, the conflicting requirements of high-transmission efficiency, large coverage area, and low latency can be beneficially balanced.

The authors demonstrate that the unified 5G spectrum-exploitation mechanism is capable of seamlessly supporting compelling IoT and eMBB services.

Full article: IEEE Vehicular Technology Magazine, Volume 13, Number 4, December 2018

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In This Issue
Message from the EiC
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Message from the President
Promoting Diversity and Inclusion
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Message from the VP—Mobile Radio
New Initiatives in Wireless
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Call for Nominations
2019 Society Awards
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From the IEEE VTS Resource Center
Battery Electric & Hybrid Vehicle Machines and Drives
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From the IEEE Vehicular Technology Magazine
4G/5G Spectrum Sharing: Efficient 5G Deployment to Serve Enhanced Mobile Broadband and Internet of Things Applications
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Mobile Radio
World’s First 5G Distributed Concert
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Transportation Systems
Bombardier Wins Contract to Provide up to 50 TRAXX MS3 Locomotives to CD Cargo
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Calls for Papers
VTC2019-Spring, VTC2019-Fall, CAVS 2019 and VPPC 2019
IEEE VTC2019-Fall in Honolulu, Hawaii
Special Issue on 5G Technologies and Applications
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Editor-in-Chief

Abbas Jamalipour

 
 
 
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22–25 September 2019
14–17 October 2019
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