Date Added: May 2012
Low Earth Orbit satellite systems gained considerable interest towards the end of the previous decade for its some important characteristics that are showed with such low propagation delay, low power requirements and ability to communicate with handheld terminals. So LEO networks are considered to be complementary rather than competitive to terrestrial networks. But the higher relative speed than terrestrial mobile networks is the main disadvantage of LEO satellites. As a result, the frequency of handover is more which decreases the quality of service. To overcome this problem, many solutions are given by scientists.