  Next generation networks are envisioned to have ubiquitous availability and
seamless access as main goals. In general, coexistence of multiple access
technologies is one of the most promising way to achieve these goals,
particularly using WiFi and LTE (Long Term Evolution) simultaneously which are
two major players in future Internet. LTE is primarily used in a licensed
spectrum but an unlicensed version is also in use by research communities. In
this work we study LTE-U (LTE-Unlicensed) and WiFi Coexistence in a handheld
device by analyzing existing scheduling mechanisms and proposing a novel scheme
of cooperation. Throughput and fairness of these multi-homed technologies are
studied in detailed. Also, we propose to use a deferral based proactive scheme
for improved system utilization.
