  This paper investigates a multi-antenna cache-enabled network with
interference nulling (IN) employed at base stations. Two IN schemes, namely,
the fixed IN scheme and the flexible IN scheme are considered to improve the
received signal-to-interference ratio (SIR) at users. To thoroughly explore the
effects of the caching parameter and the IN parameters on the network
performance, we focus on the analysis of not only the successful transmission
probability (STP) but the SIR meta distribution. For each IN scheme, the
expression for the STP is derived and an approximated expression for the SIR
meta distribution is also obtained by deriving the first and second moments of
an upper bound of the link reliability and utilizing the beta distribution.
With this analytical framework, we compare the performance of these two IN
schemes and gain some useful system design guidelines from the perspectives of
the STP and the SIR meta distribution by numerical simulations.
