Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Dynamic Resource Reservation and Connectivity Tracking to Support Real-Time Communication among Mobile Units Tullio Facchinetti | EURASIP Journal on Wireless Communications and Networking 2005 5 712-730 2005 Tullio Facchinetti et al. Dynamic Resource Reservation and Connectivity Tracking to Support Real-Time Communication among Mobile Units Tullio Facchinetti Dipartimento di Informatica e Sistemistica DIS Universita di Pavia 27100 Pavia Italy Email . it Giorgio Buttazzo Dipartimento di Informatica e Sistemistica DIS Universita di Pavia 27100 Pavia Italy Email buttazzo@ Luis Almeida Instituto deEngenharia Electrónica e Telematica deAveiro IEETA and Departamento de Electronica e Telecomunicacoes DET Universidade deAveiro 3810-193 Aveiro Portugal Email lda@ Received 29 June 2004 Revised 25 April 2005 Wireless communication technology is spreading quickly in almost all the information technology areas as a consequence of a gradual enhancement in quality and security of the communication together with a decrease in the related costs. This facilitates the development of relatively low-cost teams of autonomous robotic mobile units that cooperate to achieve a common goal. Providing real-time communication among the team units is highly desirable for guaranteeing a predictable behavior in those applications in which the robots have to operate autonomously in unstructured environments. This paper proposes a MAC protocol for wireless communication that supports dynamic resource reservation and topology management for relatively small networks of cooperative units 10-20 units . The protocol uses a slotted time-triggered medium access transmission control that is collision-free even in the presence of hidden nodes. The transmissions are scheduled according to the earliest deadline first scheduling policy. An adequate admission control guarantees the timing constraints of the team communication requirements including when new nodes dynamically join or leave the team. The paper describes the protocol focusing on the consensus procedure that supports coherent changes
