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Future Aeronautical Communications Part 12

Tham khảo tài liệu 'future aeronautical communications part 12', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 13 Utilizing IEEE 802.16 for Aeronautical Communications Max Ehammer Thomas Graupl and Elias Pschernig University of Salzburg Austria 1. Introduction The future Air Traffic Management ATM concept shall be based on network centric operations consequently on information sharing. In order to support such a vision not only a versatile and capable ground based communication network is necessary but also a network which includes the air to ground sub-networks which shall have sufficient capacity and capability. One such air to ground sub-network shall be established for the airport surface intended to be used by departing and arriving aircraft as well as by surface vehicles. This communication system is currently 2011 emerging and shall be called Aeronautical Mobile Airport Communications System AeroMACS . AeroMACS shall be based on the IEEE 802.162009 standard IEEE 2009 and especially on the WiMAX Forum Mobile System Profile Specification rel1.0 v0.9 WiMAX Forum 2010 . A draft profile has been developed and is being evaluated currently e.g. in the EU research project SANDRA SANDRA . The IEEE 802.16-2009 standard IEEE 2009 specifies the air interface of combined fixed and mobile point to multipoint broadband wireless access systems with the possibility to support different services. The standard specifies the Medium Access Control MAC and the Physical PHY layer where the MAC is capable to support multiple PHY specifications applicable to a specific operational environment. Figure 1 depicts the protocol reference model of the IEEE 802.16 standard. The Service Specific Convergence Sub-layer CS accepts higher layer data protocol units PDUs via the CS service access point SAP . Thereby the CS classifies each higher layer PDU according to available policies and maps each higher layer PDU to a so called service flow identifier. The IEEE 802.16 standard provides multiple CS specifications in order to provide interfaces for a variety of higher layer protocols. The MAC Common .