Ultra-Reliable Low Latency based on Retransmission and Spatial Diversity in slowly fading channels with co-channel interference
Ref: CISTER-TR-190704 Publication Date: 10, Sep, 2019
Ultra-Reliable Low Latency based on Retransmission and Spatial Diversity in slowly fading channels with co-channel interference
Ref: CISTER-TR-190704 Publication Date: 10, Sep, 2019Abstract:
This paper presents the analysis of the statistics
of latency and information theoretic capacity of an adaptive
link with retransmission-spatial diversity in an scenario with
co-channel interference. The objective is to evaluate the ability
of temporal and spatial diversity to achieve ultra-low values of
latency as desired in future 5G and M2M networks with real-time
requirements. It is assumed that the source transmits information
towards the destination in a Rayleigh fading spatially correlated
channel. In case the instantaneous signal-to-interference-plusnoise
(SINR) ratio has not surpassed a predetermined reception
threshold, then the source engages in a persistent retransmission
protocol. All the copies of the original transmission and
subsequent retransmissions are stored in memory and processed
at the destination using maximum ratio combining (MRC) to
obtain a more reliable copy of the signal (a scheme also called
retransmission diversity). The retransmission scheme stops once
the instantaneous post-processing SINR achieves the desired
target threshold. This persistent retransmission scheme can
also be regarded as a security mechanisms against interference
jamming attacks. Since retransmissions are assumed to take
place in a short time interval in order to achieve very low
values of latency, contiguous retransmissions are assumed to
experience statistical temporal correlation, which is explicitly
introduced in the embedded Gaussian channel distribution model.
Results suggest that retransmission diversity can provide good
latency results in moderate to high values of SINR. However,
at low SINR, a combination with other diversity sources will be
necessary to achieve the desired target value.
Events:
Document:
Workshop on Secure and trustable wirelessly connected industrial IoT (STWCI-IOT), pp 1790-1795.
Zaragoza, Spain.
DOI:10.1109/ETFA.2019.8869236.
ISBN: 978-1-7281-0303-7.
ISSN: 1946-0759.
Notes: This workshop is being held in conjunction with ETFA 2019.
Record Date: 5, Jul, 2019