  The need for cables with high-fidelity Virtual Reality (VR) headsets remains
a stumbling block on the path towards interactive multi-user VR. Due to strict
latency constraints, designing fully wireless headsets is challenging, with the
few commercially available solutions being expensive. These solutions use
proprietary millimeter wave (mmWave) communications technologies, as extremely
high frequencies are needed to meet the throughput and latency requirements of
VR applications. In this work, we investigate whether such a system could be
built using specification-compliant IEEE 802.11ad hardware, which would
significantly reduce the cost of wireless mmWave VR solutions. We present a
theoretical framework to calculate attainable live VR video bitrates for
different IEEE 802.11ad channel access methods, using 1 or more head-mounted
displays connected to a single Access Point (AP). Using the ns-3 simulator, we
validate our theoretical framework, and demonstrate that a properly configured
IEEE 802.11ad AP can support at least 8 headsets receiving a 4K video stream
for each eye, with transmission latency under 1 millisecond.
