In the future era of  communication, realizing ubiquitous and seamless  mobility
in heterogeneous networks environment is of prime importance. Users will need to
select the best  option available from  diverse networks and  service scenarios.
New strategies need to be introduced  in order to handle complex scenarios  that
would enable  support of  context-awareness. This  paper investigates  different
communication  and  vertical   handover  scenarios  in   heterogeneous  networks
environment  and,  with  respect  to  those,  analyzes  possible  strategies and
mechanisms that  would need  to be  taken into  account for realizing ubiquitous
mobility. It also identifies a context model for the terminal as well as for the
network side.