| Emergency Communication System is outlined firstly, including network stfucture, PRN system, low-layer protocols and frame format . Secondly , the hardware of net station and interface standard are discussed with emphasis on low-layer communication interface R interface . Next the implement method and flow chart of programs are showed in detail . The reliability of software is analyzed at the same time . Then the MAC protocols of PRN is studied . A kind of modified R-NAD algorithm based on 220B is put forward and emulated in the paper. Finally the system testing report about PRN is attached.
|
PDF Full Text Request