Control and data channel combining in ultra-reliable low-latency communication

Le, Trung-Kien; Salim, Umer; Kaltenberger, Florian
ASILOMAR 2019, Asilomar Conference on Signals, Systems, and Computers, 3-6 November 2019, Pacific Grove, CA, USA

5G will be supporting new services that have remarkably higher requirements than LTE 4G and Ultra-reliable and low-latency communication (URLLC) is one of those emerged
categories. Although various techniques have been proposed to improve the data reliability, there has been a gap in how to improve the reliability of control/scheduling information pointing to the scheduled data. In this paper, we propose an intelligent
combining of retransmissions of physical downlink control channel (PDCCH) and the physical downlink data channel (PDSCH). In the proposed scheme, the downlink control information (DCI) on PDCCH already indicates the location of a potential retransmission
of the corresponding PDSCH. Moreover, the retransmitted DCI can be combined with the first transmission so that resource consumption and latency are reduced compared to
the conventional scheme. Theoretical calculations and simulation results show a decrease of resource consumption.

Pacific Grove
Systèmes de Communication
Eurecom Ref:
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