Thilina N. Weerasinghe

Thilina N. Weerasinghe
University of Ruhuna

PhD

About

10
Publications
3,210
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47
Citations
Introduction

Publications

Publications (10)
Article
Full-text available
Although grant-based mechanisms have been a predominant approach for wireless access for years, the additional latency required for initial handshake message exchange and the extra control overhead for packet transmissions have stimulated the emergence of grant-free (GF) transmission. GF access provides a promising mechanism for carrying low and mo...
Article
Full-text available
At a density of one million devices per square kilometer, the 10’s of billions of devices, objects, and machines that form a massive Internet of things (mIoT) require ubiquitous connectivity. Among a massive number of IoT devices, a portion of them require ultra-reliable low latency communication (URLLC) provided via fifth generation (5G) networks,...
Article
Full-text available
Availability and reliability are two essential metrics for the design, deployment, and operation of future ultra-reliable low latency communication (URLLC) networks. Despite a vast amount of research efforts towards URLLC, very little attention has been made on the ultra-reliable communication (URC) aspect of URLLC from a dependability perspective....
Conference Paper
Full-text available
Emerging 5G mobile networks envisage ultrareliable communication (URC) as one of the major requirements for anytime anywhere communication. Although URC has recently attracted a lot of attention in the research community, existing work seems to rely on approaching reliability merely from a time domain perspective. However, both time and space domai...

Questions

Questions (3)
Question
Can any one explain how the number of PRACH slots within a sub-frame value is obtained in 5G NR?.
In 3GPP 38.211 v15.1.0-Table 6.3.3.2-2 <Random access configurations for FR1 and paired spectrum/supplementary uplink >, it is mentioned that the number of PRACH slots within a sub-frame is either 1,2 or ''-", depending on the preamble format.
Does the value "2" means that there are two slots available for one preamble transmission? or is it two slots for two different preamble transmission opportunities?.
Question
MMTC is considered as one major direction in 5G. 3GPP has some earlier releases (TR 37.868, 37.869 ) about standards on MTC and RAN enhancements for MTC. However, I could n't find any 3GPP or other similar documents from standardization bodies related to MMTC. Please share if you are aware of such documents.
Question
In LTE, given that a device is static (non mobile), is it possible to use the same Timing advance value for all transmissions from that device for the same eNB?.

Network

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