On the resource utilization of multi-connectivity transmission for URLLC services in 5G new radio
Mahmood, Nurul Huda; Karimi, Ali; Berardinelli, Gilberto; Pedersen, Klaus I.; Laselva, Daniela (2019-04-18)
N. H. Mahmood, A. Karimi, G. Berardinelli, K. I. Pedersen and D. Laselva, "On the Resource Utilization of Multi-Connectivity Transmission for URLLC Services in 5G New Radio," 2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW), Marrakech, Morocco, 2019, pp. 1-6. doi: 10.1109/WCNCW.2019.8902865
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Multi-connectivity with packet duplication, where the same data packet is duplicated and transmitted from multiple transmitters, is proposed in 5G New Radio as a reliability enhancement feature. This paper presents an analytical study of the outage probability enhancement with multi-connectivity, and analyses its cost in terms of resource usage. The performance analysis is further compared against conventional single-connectivity transmission. Our analysis shows that, for transmission with a given block error rate target, multi-connectivity results in more than an order of magnitude outage probability improvement over the baseline single-connectivity scheme. However, such gains are achieved at the cost of almost doubling the amount of radio resources used. Multi-connectivity should thus be selectively used such that its benefits can be harnessed for critical users, while the price to pay in terms of resource utilization is simultaneously minimized.
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