8 research outputs found
An Examination of the Benefits of Scalable TTI for Heterogeneous Traffic Management in 5G Networks
The rapid growth in the number and variety of connected devices requires 5G
wireless systems to cope with a very heterogeneous traffic mix. As a
consequence, the use of a fixed TTI during transmission is not necessarily the
most efficacious method when heterogeneous traffic types need to be
simultaneously serviced.This work analyzes the benefits of scheduling based on
exploiting scalable TTI, where the channel assignment and the TTI duration are
adapted to the deadlines and requirements of different services. We formulate
an optimization problem by taking individual service requirements into
consideration. We then prove that the optimization problem is NP-hard and
provide a heuristic algorithm, which provides an effective solution to the
problem. Numerical results show that our proposed algorithm is capable of
finding near-optimal solutions to meet the latency requirements of mission
critical communication services, while providing a good throughput performance
for mobile broadband services.Comment: RAWNET Workshop, WiOpt 201
Performance Analysis of a System with Bursty Traffic and Adjustable Transmission Times
In this work, we consider the case where a source with bursty traffic can
adjust the transmission duration in order to increase the reliability. The
source is equipped with a queue in order to store the arriving packets. We
model the system with a discrete time Markov Chain, and we characterize the
performance in terms of service probability and average delay per packet. The
accuracy of the theoretical results is validated through simulations. This work
serves as an initial step in order to provide a framework for systems with
arbitrary arrivals and variable transmission durations and it can be utilized
for the derivation of the delay distribution and the delay violation
probability.Comment: ISWCS 201
Resource Optimization with Flexible Numerology and Frame Structure for Heterogeneous Services
We explore the potential of optimizing resource allocation with flexible
numerology in frequency domain and variable frame structure in time domain, in
presence of services with different types of requirements. We analyze the
computational complexity and propose a scalable optimization algorithm based on
searching in both the primal space and dual space that are complementary to
each other. Numerical results show significant advantages of adopting
flexibility in both time and frequency domains for capacity enhancement and
meeting the requirements of mission critical services.Comment: 4 page