Abstract: A method of two-stage adaptive frequency hopping for a clustered wireless sensor network, including: a) building a clustered wireless sensor network; b) defining a superframe structure based on IEEE 802.15.4 according to a topology of the clustered wireless sensor network; c) extending a beacon frame payload based on a beacon frame format of an IEEE 802.15.4 Media Access Control (MAC) layer; and d) performing a two-stage adaptive frequency hopping mechanism on nodes based on the above superframe structure and the extended beacon frame of the IEEE 802.15.4 MAC layer.
Type:
Application
Filed:
April 24, 2012
Publication date:
August 23, 2012
Applicant:
Shenyang Institute of Automation of the Chinese Academy of Sciences
Abstract: A method of platformization of an equipment front end module of a semiconductor production system includes the steps of: establishing a subsystem management module, a communication interface module, a parse module, and a network communication module; directing the command by the communication interface module to the subsystem management module; analyzing the command by the subsystem management module and sending the command to the corresponding subsystem module; sending the command from the corresponding subsystem module to the controller of the equipment front end module through the network communication module; and analyzing message by the parse module, sending a feedback to the corresponding subsystem module, and then sending the feedback to the control system of the semiconductor production system through the communication interface module.
Type:
Application
Filed:
March 28, 2011
Publication date:
July 5, 2012
Applicant:
Shenyang Institute of Automation, Chinese Academy of Sciences
Abstract: A method of achieving wireless sensor network (WSN) communication in a mesh and star topology network (MSTN), including: a) connecting a plurality of nodes in a WSN to form a mesh and star hybrid topology structure; b) based on the topology structure, defining a superframe structure based on IEEE 802.15.4-2006; c) based on the topology structure and superframe structure, defining methods for long period data processing, connectivity assessment, medium access control, channel measurement, frequency hopping, beacon frame formation, and two-stage resource allocation; d) based on the topology structure, superframe structure, and methods, defining a method for network establishment; and e) based on the network establishment method, defining a method for MSTN communications. The method features real-time communication, high reliability, and low energy consumption.
Type:
Application
Filed:
August 30, 2011
Publication date:
December 22, 2011
Applicant:
Shenyang Institute of Automation of the Chinese Academy of Sciences
Inventors:
Wei LIANG, Haibin YU, Xiaoling ZHANG, Miao YANG, Weijie XU, Jun WANG, Peng ZENG, Zhijia YANG