Real-time voice communications over a token-passing ring local area network

1986 ◽  
Vol 16 (3) ◽  
pp. 52-57
Author(s):  
E Friedman ◽  
C Ziegler
Keyword(s):  
Real Time ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Voice Communications ◽  
Token Passing

LXI Precision Time Protocol Applied Research

2013 ◽  
Vol 330 ◽  
pp. 561-564 ◽  
Author(s):  
Ming Li ◽  
Chun Ping Wang ◽  
Zhi Qiang Wang
Keyword(s):  
Real Time ◽  
Applied Research ◽  
Time Synchronization ◽  
Local Area Network ◽  
Local Area ◽  
Test System ◽  
Area Network ◽  
Automatic Test System ◽  
Precision Time ◽  
Precise Time

In order to meet the real-time demands of some equipment networked test, the time synchronization techniques of ATS based traditional instrument buses are compared with the techniques of LXI ATS. Accordingly，the necessity of LXI ATS time synchronization technique study is put forward. The sorts of time synchronization techniques based on Local Area Network are analyzed. In addition, some methods which could improve the level of LXI data real-time communications are presented. Afterwards, technique realizations of PTP are studied in detail. Local Area Network techniques and IEEE 1588 Precise Time Protocol are adopted in the LXI Automatic Test System which designed in the paper, and the level of time synchronization precision in the system is improved.

A local area network architecture for communication in distributed real-time systems

1991 ◽  
Vol 3 (2) ◽  
pp. 115-147 ◽  
Author(s):  
K. Arvind ◽  
Krithi Ramamritham ◽  
John A. Stankovic
Keyword(s):  
Real Time ◽  
Network Architecture ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Real Time Systems ◽  
Time Systems

UAV Avionics System Software Development Using Simulation Method

2013 ◽  
Vol 198 ◽  
pp. 260-265 ◽  
Author(s):  
Bartosz Brzozowski ◽  
Wiesław Sobieraj ◽  
Konrad Wojtowicz
Keyword(s):  
Real Time ◽  
High Performance ◽  
Local Area Network ◽  
Simulation Method ◽  
Local Area ◽  
Area Network ◽  
Hardware In The Loop ◽  
System Software ◽  
Sensors And Actuators ◽  
Research Platform

During last few years avionics system research platform was invented at the Military University of Technology. This modular simulator allows user to design and verify avionics system software using hardware-in-the-loop technique. Mathematical model of an airplane under tests is implemented on a high-performance computer which response to all control signals and environmental disturbances. Environment is simulated on a separate computer which can also visualize orientation and movement of the airplane. Plane structure and aerodynamic features as well as control data can be modified accordingly to user needs. The third PC is used as an interface unit between research platform and main computational unit of the avionics system. This device can send and receive information in real-time using various data protocols and interfaces depending on sensors and actuators that are planned to be used in real system. Those three computers work in a local area network and exchange data using Gigabit Ethernet standard. Possibility to simulate behavior of an UAV controlled by the developed avionics system implemented on an embedded computer working in hardware-in-the-loop mode on the platform, allows software developer to debug any part of the application in various environment conditions very close to reality. Research platform gives also the possibility to modify algorithm and adjust its parameters in real-time to verify suitability of the implemented avionics system software for the particular UAV. The avionics system software developed using this simulation method minimize expensive in-flight tests and assure failsafe performance after first successful flight

Real Time Recording System of Radioisotopes by Local Area Network(LAN)Computer System and User Input Processing.

RADIOISOTOPES ◽  
1991 ◽  
Vol 40 (9) ◽  
pp. 365-368 ◽  
Author(s):  
Kunio SHINOHARA ◽  
Atsushi ITO ◽  
Hajime KAWAGUCHI ◽  
Makoto YANASE ◽  
Kiyoshi UNO
Keyword(s):  
Real Time ◽  
Computer System ◽  
Local Area Network ◽  
Local Area ◽  
Recording System ◽  
Area Network ◽  
User Input ◽  
Input Processing

LXI Precision Time Protocol Applied Research

2013 ◽  
Vol 772 ◽  
pp. 432-435
Author(s):  
Ming Li ◽  
Chun Ping Wang ◽  
Zhi Qiang Wang
Keyword(s):  
Real Time ◽  
Applied Research ◽  
Time Synchronization ◽  
Local Area Network ◽  
Local Area ◽  
Test System ◽  
Area Network ◽  
Automatic Test System ◽  
Precision Time ◽  
Precise Time

In order to meet the real-time demands of some equipment networked test, the time synchronization techniques of ATS based traditional instrument buses are compared with the techniques of LXI ATS. Accordingly,the necessity of LXI ATS time synchronization technique study is put forward. The sorts of time synchronization techniques based on Local Area Network are analyzed. In addition, some methods which could improve the level of LXI data real-time communications are presented. Afterwards, technique realizations of PTP are studied in detail. Local Area Network techniques and IEEE 1588 Precise Time Protocol are adopted in the LXI Automatic Test System which designed in the paper, and the level of time synchronization precision in the system is improved.

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