2OTTMAR RAEYMAECKERS. VDL Mode 4 Point-to-point communications protocol evaluation applied to airline operational communications [D].Sweden : Department of Aeronautics Royal Institute Technology, 2010.
3Radiocommunication Sector of ITU.Recommendation ITU-RM.1371-4 Technical Characteristics For a Universal Shipborne Automatic Identification System Using Time Division Multiple Access In The VHF Maritime Mobile Band[S].Switzerland: Geneva Electronic Publication, 2010.