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Proceedings Paper

Implementation of advanced modified PCF in large telescope control system
Author(s): Xiaoying Shuai; Zhenchao Zhang; Yongtian Zhu
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Paper 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.

Paper Details

Date Published: 18 July 2008
PDF: 8 pages
Proc. SPIE 7019, Advanced Software and Control for Astronomy II, 701923 (18 July 2008); doi: 10.1117/12.786761
Show Author Affiliations
Xiaoying Shuai, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Graduate School of the Chinese Academy of Sciences (China)
Zhenchao Zhang, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Yongtian Zhu, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)


Published in SPIE Proceedings Vol. 7019:
Advanced Software and Control for Astronomy II
Alan Bridger; Nicole M. Radziwill, Editor(s)

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