Tham khảo tài liệu 'future aeronautical communications part 13', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 288 Future Aeronautical Communications Fig. 28. FL avg. latency - scenario PIAC. Fig. 29. RL avg. latency - scenario PIAC. 6. Conclusion The demand to integrate the aircraft into the network centric concepts requires capable air ground data-links. AeroMACS shall provide this functionality at the airport surface. Infrastructure and equipage used for aeronautical procedures is evolving very slowly due to several reasons. Cost interoperability and safety issues are some among many reasons. Any new system integrated into the aeronautical environment will last for decades until it might eventually be replaced through a new system. Therefore it is of importance to design new Utilizing IEEE for Aeronautical Communications 289 systems carefully and with mature concepts in order to remain prepared for changing requirements in the future. Integrating the AeroMACS sub-network into an IPv6 based aeronautical telecommunication network ATN is generally a problem which needs to be resolved from the application s point of view and from the operator point of view. It is also important to keep flexibility in order to be capable to adapt to any future changes of requirements. Especially if products have such long life cycles as in the aeronautical world it is almost impossible to assess the proper requirements. Multicast applications may be very attractive to the future ATM concept however most of these applications are not realized yet . they exist only in theory . With a wrong sub-net configuration the introduction of application layer concepts based on multicast may be quite difficult and or expensive. During the course of the SANDRA project a data traffic load analysis has been conducted which showed that applications with significant load requirements would justify the introduction of a broadband wireless communication system for airport surface communications. Furthermore MAC performance simulations have shown performance figures to be expected by a future AeroMACS .
