This paper describes the design and implementation of
"A multiprocessor node for communication and control"
(MPCC). MPCC is a high speed, high performance local area
network capable of performing real time control tasks. This
is achieved by the concurrent operation of two 8051
microcontrollers, a dual port RAM and the...
Rapid advances in technology have seen computing move from a
large central computer to desktop microcomputers.
This advance was also
seen in the design of dedicated computers, computers designed to perform a
few specialized tasks or duties.
These computers, or microcontrollers, are
often controlled by a central computer and themselves...
This paper describes the design and implementation of
COLAN V, a High Performance Local Area Network for
Communications and Control utilizing a Communications Coprocessor.
The main objective of this thesis is to improve upon
the performance of previous COLANs in speed, switching
techniques and error detection techniques. This was
possible...
EDLAN is a simple, inexpensive local area network suitable for
educational applications. In EDLAN, a number of personal computers are
connected through an RS-485 global bus which carries the data
transmission among the computers. CSMA/CD protocol is used to control
the access of the global bus. The communications are controlled...
This thesis discusses the design and development of a
viable local area network (LAN) which supports both
communications and control applications. The emphasis was
to develop a practical and cost effective system which
offered high performance while utilizing low cost
components. System cost was kept low by utilizing a
twisted-pair...
COLAN (Control Oriented Local Area Network ) is a
redesign of the Task-Master, a daisy-chain structure
distributed control system. COLAN is a simple bus structure
communication subnetwork intended for distributed control
applications. Low cost and simplicity are two main design
criteria. Point-to-point and broadcast communications are
possible. A packet switching...
This paper describes the design and implementation
of COLAN II, a control oriented local area network (LAN).
COLAN II employs a bus interconnection structure and
a token passing method to control the access to the bus.
Major emphasis of the work is on the system structure and
the software operating...
The Control-Oriented Local Area Network (COLAN) is a
distributed control system for a series of networked
microcontrollers, which has been under development at Oregon
State University since 1986. A reliable master controller, functioning
both as a task scheduler and as a network controller, is
required to allow users to perform...
GEMS (Graphical Ethernet Monitoring System) is an
enhancement to the SU-PC/IP NETWATCH program, for the
graphical display and recording of computer network packets.
SU-PC/IP (Stanford University Personal Computer/Internet
Protocol) NETWATCH displays one line of information per
packet, including the packet type, IP addresses, packet
size, and protocol type, etc. This...
COLAN III is a control oriented LAN designed to achieve reasonable
network performance and flexibility at low cost. These objectives are
achieved by utilizing inexpensive microcontrollers (8031s) and hardware
support. The CSMA/CD network protocol with single bus structure has
been employed in COLAN III as an arbitration method to control...
In recent years, the new integrated circuit technology has spawned the
development of many low cost high performance microcontrollers. With the
improvement in the processor speed, instruction sets, and memory capacities,
these microcontrollers are ideal for the implementation of Control-Oriented
Local Area Networks (COLAN) for real-time distributed control systems. The...
The performance of multi-user workstations that access files
over a local area network is studied. Such file systems, called
distributed file systems, provide access of remote file systems with a
great degree of transparency. The main objectives are
To study the principles of distributed file systems. specifically
NFS from Sun...
Control oriented local area networks (COLANs) are being installed in factories at an increasing rate. Traditionally, process control has operated with a master scheduler (computer) monitoring a number of points in a control grid. As the complexity of today's process control needs grow, the need to process information locally increases....
In recent years, integrated circuit technology has
spawned the development of many low cost and high performance
microprocessors and microcontrollers. With these devices,
there is an increasing interest in the implementation of
distributed control networks, utilizing microprocessors in the
control nodes.
In this work, a low-cost liquid crystal display (LCD)...
A Hybrid Meshnet LAN, a new local area network architecture, has been proposed by Dr. Cheoul-Shin Kang and Dr. James Herzog. It provides for distributed control hybrid architecture which is good for effective load sharing under various local area network environments. Hybrid Meshnet has a dual channel structure, a token...
TASKMASTER is an experimental microcontroller node of a real-time control
oriented network which was proposed by James H. Herzog and Tinggui Zhang to
demonstrate the feasibility of a task oriented control structure in performing distributed
control actions. This study is a continuation of research involving the TASKMASTER
network.
A high...
Since its introduction in the early 1990s, the quick growth of the World Wide Web
(WWW) traffic raises the question of whether past Local Area Network (LAN) packet
traces still reflect the current situation or whether they have become obsolete. For this
thesis, several LAN packet traces were obtained by...