Darin Nelson

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Current wireless systems allow simple messaging services such as one- or two-way text messaging using Short Messaging Service (SMS), paging and voicemail. Motivated by the convergence of messaging (eg., emails) with information services (eg., request for stock quotes), entertainment (eg., interactive games), commerce (eg., advertisements) etc. in the(More)
This memo describes the use of a Remote Authentication Dial-In User Service (RADIUS) authentication and authorization service with Simple Network Management Protocol (SNMP) secure Transport Models to authenticate users and authorize creation of secure transport sessions. While the recommendations of this memo are generally applicable to a broad class of(More)
This memo defines a portion of the Management Information Base (MIB) for use with network management protocols. It describes the use of information provided by Authentication, Authorization, and Accounting (AAA) services, such as the Remote Authentication Dial-In User Service (RADIUS), to dynamically update user-to-group mappings in the View-based Access(More)
This paper presents EduCOM, a graphical language for teaching and learning digital communication systems. In EduCOM students build graphical models (i.e., block diagrams) of digital communication transmitters, channels, and receivers. Then EduCOM creates the shell of a C/Cþþ code realization of the graphical model, but it leaves the implementation of each(More)
Graphical modeling software tools have become commonplace in educational laboratories associated with courses in signal processing and communication systems. This paper explains that the purely graphical approach to modeling and simulation can be improved upon by combining graphical modeling with some low-level programming tasks. To implement this(More)
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