A routing hotspot is typically created by an unanticipated new event that triggers an unanticipated surge of users that request streaming service from some particular peers, temporarily overwhelming the peer s delivery capabilities and overloading network connections.

Strategy for problem of rooting hotspot in P2P network;

Zone Routing Protocol in MANET consists of IntrAzone and IntErzone routing.

The inappropriate using of the MED attribute commonly induces to the hot potato routing and the persistent MED oscillation.

The distributions of seabed soil and the tidal current characteristics in the Beihai-Lingao section submarine cable route area in the Qiongzhou Channel are acquired by analyzing the field survey and indoor test results,and the possibilities of soil mass failure in the cable route area due to 10 year and 50 year return period tidal currents are calculated and analyzed.

Based on the near-surface sediment distributions and physicomechanical characteristics in the Qiongzhou Strait Beihai to Lingao submarine cable route area and the earthquake data observed in the cable route neighbouring area,the possibilities of liquefaction or slide of seabed soil at depths less than 3 m in the route area under the earthquake actions are computed and analyzed.