  Augmented Reality (AR) smartglasses are increasingly regarded as the next
generation personal computing platform. However, there is a lack of
understanding about how to design communication systems using them. We present
ARcall, a novel Augmented Reality-based real-time communication system that
enables an immersive, delightful, and privacy-preserving experience between a
smartphone user and a smartglasses wearer. ARcall allows a remote friend
(Friend) to send and project AR content to a smartglasses wearer (Wearer). The
ARcall system was designed with the practical limits of existing AR glasses in
mind, including shorter battery life and a reduced field of view. We conduct a
qualitative evaluation of the three main components of ARcall: Drop-In,
ARaction, and Micro-Chat. Our results provide novel insights for building
future AR-based communication methods, including, the importance of context
priming, user control over AR content placement, and the feeling of co-presence
while conversing.
