Data Rate Based Performance Analysis and Optimization of Bulk OUT Transactions in USB 3.0 SuperSpeed Protocol

Abstract

USB 3.0 SuperSpeed is one of the most widely used serial communication protocols that interface various electronic devices. It provides a signaling rate as high as 5 Giga Bits Per Second and raw data rate of 400-500 Mega Bytes Per Second with functional overheads. With transfers such as Bulk, Isochronous, Interrupt, Control types; Bulk transactions are highly acclaimed due to their efficient utilization of bandwidth and guaranteed delivery of integral data between host and device. Hence, data rate based performance becomes an inherent criterion to verify that the design and implementation conforms to the protocol standards and system requirements. The analysis and characterization of performance based on data rate provides the necessary information so as to improve the robustness and accuracy of the design. Different parameters that may be tun-able act as causative factors in enhancing or degrading the data rate. This paper presents an elaborate description of various facets through which data rate based performance analysis is achieved for USB 3.0 SuperSpeed Bulk OUT transactions. This paper also deals with the characterization and statistical variation of causative factors for different scenarios to obtain minimum, maximum and ideal data rate thus leading to optimum performance.