  This document surveys recent and current developments in LEO satellite
networking. It presents a brief overview of satellite networking in order to
contextualize the issue. It then focuses on current research work in emerging
domains, such as Machine Learning, SDN, low latency networking, green
networking, Information-Centric Networks, etc. For each, it presents recent
works and a direction of the research community within that emerging domain.
  The paper also describes the current state of standardization efforts in 3GPP
and in IETF for LEO satellite networking. In particular, we present in some
detail the direction these standards body are pointing towards for LEO
networking with inter-satellites links. Finally, some future challenges and
interesting research directions are described and motivated. This is an
overview of the current state of the LEO satellite research in both academic
and industrial standardization environments which we believe will be helpful to
understand the current state of the art.
