Mobility Performance Analysis of Scalable Cell-Free Massive MIMO
- Resource Type
- Conference
- Authors
- Xiao, Yunlu; Mahonen, Petri; Simic, Ljiljana
- Source
- ICC 2022 - IEEE International Conference on Communications Communications, ICC 2022 - IEEE International Conference on. :2543-2548 May, 2022
- Subject
- Communication, Networking and Broadcast Technologies
Costs
Spectral efficiency
Simulation
Conferences
Massive MIMO
Handover
Throughput
scalable cell-free massive MIMO
handover rate
mobility-aware throughput
- Language
- ISSN
- 1938-1883
While scalable cell-free massive MIMO (CF-mMIMO) shows advantages in static conditions, the impact of its changing serving access point (AP) set in a mobile network is not yet addressed. In this paper we first derive the CPU cluster and AP handover rates of scalable CF-mMIMO as exact numerical results and tight closed form approximations. We then use our closed form handover rate result to analyse the mobility-aware throughput. We compare the mobility-aware spectral efficiency (SE) of scalable CF-mMIMO against distributed MIMO with pure network- and UE-centric AP selection, for different AP densities and handover delays. Our results reveal an important trade-off for future dense networks with low control delay: under moderate to high mobility, scalable CF-mMIMO maintains its advantage for the 95 th -percentile users but at the cost of degraded median SE.