航空电子微距太赫兹互连DRR访问容量分析

To reduce size, weight and maintenance costs of wires, cables and connectors in airborne electronic systems, Terahertz (THz) communication technologies can be adopted to realize very-short range interconnections in a magnitude of centimeter between circuit boards or off-chips within avionics components. Under the condition that THz node-to-node links can be implemented by the On-Off Keying (OOK) modulation and non-coherent demodulation, design methods for parameters such as data rate and packet length were proposed to help form clustered network architecture with half duplex multiple access between a head node and user nodes. Within a cluster, the DRR mechanism was adopted as the Media Access Control (MAC) scheme from user nodes to the head node. Based on the Stochastic Network Calculus (SNC), the probabilistic guaranteed effective capacity for multi-accessing nodes was deduced to analyze the effect of jamming interference from the physical layer on the DRR service curve. Analysis and computation results show that the DRR scheduling can achieve flexible multiplexing with real-time performance guaranteed, therefore meeting the application requirements in THz multi-accessing communications and clustered networking among small or micro avionics components.