Implementation of advanced modified PCF in large telescope control system

Xiaoying Shuai; Zhenchao Zhang; Yongtian Zhu

doi:10.1117/12.786761

18 July 2008 Implementation of advanced modified PCF in large telescope control system

Xiaoying Shuai, Zhenchao Zhang, Yongtian Zhu

Proceedings Volume 7019, Advanced Software and Control for Astronomy II; 701923 (2008) https://doi.org/10.1117/12.786761
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

Large Telescope Control System (TCS) is a complicated system, which contains thousands of actuators. Wired TCS is inconvenient to point and track for a large telescope. This paper proposes a TCS based on IEEE 802.11 Wireless Local Area Network (WLAN), which provides flexibility, reduced infrastructure costs, and greater convenience. The IEEE 802.11 standard MAC protocol includes the DCF and the PCF. The DCF is designed for asynchronous data transmission, while the PCF is designed for real-time data. The performance of a WLAN with DCF will fall when the number of wireless station increase in a basic service set (BSS). An advanced modified PCF (APCF) is presented to poll data from the AP to stations and response data from stations to the AP in CFP. The analysis indicates that APCF can improve communication performance, and is very suitable for large TCS.

Citation Download Citation

Xiaoying Shuai, Zhenchao Zhang, and Yongtian Zhu "Implementation of advanced modified PCF in large telescope control system", Proc. SPIE 7019, Advanced Software and Control for Astronomy II, 701923 (18 July 2008); https://doi.org/10.1117/12.786761

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