  Open-access domestic broadband connection sharing constitutes a voluntary
practice that is associated with societal, economic and public-safety benefits.
Despite this fact, broadband subscribers are usually hesitant to freely share
their broadband connection with guests for a multitude of reasons; one of them
being sharing their network might hinder their own broadband quality of
experience. In this paper, we investigate experimentally the impact of uplink
guest traffic on the sharer's broadband quality of experience under both
generic and broadband-sharing-specific packet scheduling policies. Both
guest-user traffic and access point profiles employed in our study are
developed by analyzing real-world traffic traces and measurements, captured
from actual broadband sharing networking environments. Our results validate the
suitability of hybrid packet scheduling policies for broadband sharing schemes
and show that only a few dozen kilobytes per second of uplink guest traffic can
be tolerated by sharers without hampering their broadband quality of
experience. In this context, we show that the selection of the most appropriate
packet scheduling policy for broadband sharing, as well as its respective
configuration, depend largely on the capacity of the broadband connection and
the policy's packet-dropping behavior on guest traffic.
