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This paper investigates and compares the performance of different scheduling techniques in an Ethernet fronthaul network in the presence of both time-sensitive/high priority and background traffic streams. A switched Ethernet architecture is used as the fronthaul section of a cloud radio access network (C-RAN) and a comparison of two scheduling schemes, strict priority scheduling and time-aware shaping,...
Clock synchronization is a necessary feature in in-vehicle time- and safety-critical networks. The reason is that exact timing information has to be maintained in nodes, for instance for time stamps of messages that are important for safety-critical functions. A common time base has to be established at start-up time before time-sensitive data handling can begin. In vehicular applications, this clock...
Recently, IEEE 802.3 Ethernet network is not limited to be used as the sub-network of a vehicle but also can be used as backbone network of a vehicle. Audio/Video Bridge (AVB) standard is about the Ethernet technology that can be used as a backbone network in a vehicle. AVB provides time-synchronized low latency streaming service through the Ethernet. 802.1 AS protocol in AVB can synchronize the time...
Ethernet is going to play a major role in automotive communications, thus representing a significant paradigm shift in automotive networking. Ethernet technology will allow for multiple in-vehicle systems (such as, multimedia/infotainment, camera-based advanced driver assistance and on-board diagnostics) to simultaneously access information over a single unshielded twisted pair cable. The leading...
The IEEE 802.1 Audio/Video Bridging (AVB) protocol successfully supports audio/video streaming over Ethernet networks and is also a promising candidate for industrial automation. However, several industrial automation applications feature requirements that cannot be fulfilled by the current AVB standard. The next generation of IEEE 802.1 standards, which will specifically target the requirements of...
This paper presents a device qualification approach for IEEE 1588 devices. Based on repetitive measurements within heterogeneous networks, standard stimulation data and device reaction values are defined for qualification of PTP bridges. According to these measurements, PTP bridges are classified into three classes basic, advanced, and high-performance. In order to execute the required device tests,...
Audio-Video-Bridging (AVB) is a promising new commercially available Ethernet-based standard providing mechanism for audio and video transmission over Ethernet supporting demanding audio and video transmission delay requirements. This paper addresses the applicability of using AVB in a fully-switched Ethernet network that covers safety-related functions in the aeronautics. Avionic systems leveraging...
The imaging laser radar is fine measure equipment for TAN with the ability to get the high precision 3D terrain. A 3D terrain matching processor was needed to be designed for the specifical application. In this paper, base on the specialty of the imaging laser radar, the3D terrain matching processor was designed, with scheme of DSP+FPGA calculating engine, multi-level memory system, flexible parallel...
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