Handoff and its Key Technologies of Ground-air Ultra-short Wave Voice Communication Network

The ground-air ultra-short wave voice communication network(GUWVCN) is an important infrastructure for implementing air traffic control and air command communication,and handoff is an important part of GUWVCN for keeping ground-air communication successive.First,the structure and handoff process of GUWVCN are introduced,and the differences of handoff between GUWVCN and land mobile communication system,data link system are compared and analyzed.Second,the key technologies of handoff of GUWVCN are put forward and detailedly described.Finally,the development trends of handoff of GUWVCN are pointed out.