att_abstract={{Scalable wireless geographically addressed messaging has
been shown to enable applications critical to the core
missions of field operation teams.  In particular, the
Scalable Ad hoc Geocast Protocol (SAGP) has been used to
implement a scalable field common operating picture among
smartphone class devices, as well as reliable multimedia
messaging and distributed collaboration under challenging
field conditions. In this paper, we study a third category:
streaming applications.  In geographically addressed
streaming, one wishes to distribute a data feed to all
devices in a geographic area. Example uses include voice
calls (both 1-1 and group), distribution of video to
operators in an area, and speeding up the distribution of
large files. While SAGP itself may be used to implement
robust streaming, this paper describes a novel enhancement to SAGP,
termed Followcast, that exploits the properties of streaming
applications to obtain efficient and scalable bandwidth use
while maintaining acceptable reliability. This
paper describes Followcast and two applications of it. It
then evaluates its efficiency and reliability through
measurements of a smartphone prototype,
simulations, and analysis.
	att_categories={C_NSS.7, C_NSS.10, C_NSS.18},
	att_copyright_notice={{This version of the work is reprinted here with permission of IEEE for your personal use. Not for redistribution. The definitive version was published in 2014{{, 2014-10-06}}
	att_tags={streaming,  geographic,  content distribution,  scale,  wireless networking},
	author={Robert Hall},
	institution={{2014 IEEE Military Communications Conference}},
	title={{An efficient protocol for geographically addressed streaming}},