Integrated Telecommunications System Research Articles

Phase-Shifted Bragg Gratings Based on Hybrid Plasmonics Structure

An ultra-compact Bragg grating based on hybrid plasmonics is presented to achieve efficient wavelength selection by a resonate cavity, which is promising for many applications in integrated telecommunications systems.

Integrated Services Digital Networks: How it Can Be Used for Distance Education

Integrated Services Digital Networks (ISDN) is an emerging telecommunications technology that will affect how distance education is designed, developed, and presented. Combined with integrated desktop workstations, it will put voice, text, and video telecommunications at the fingertips of educators and learners. Appropriate use of ISDN for distance education and training depends on the development of a conceptual scheme to integrate models from several closely related areas such as integrated information systems, educational broadcasting, computer assisted instruction, and distance education. In a project funded by Northern Telecom Inc., faculty and students of the Department of Educational Technology at San Diego State University are presently involved in evaluating an integrated telecommunications system and developing an integrated model of distance education.

Concepts: Integrated telecommunications systems and instructional transaction

Concepts: Integrated telecommunications systems and instructional transaction

A Queueing Analysis of an Integrated Telecommunications system with Priorities

AbstractIn an integrated telecommunications system both voice and data compete for use of the same group of channels. Such a system allows for better use of the channels and more efficient use of the system facilities. Numerous operating rules for allowing voice and data access to the channels can be considered. In this paper, we give a steady state queueing analysis for two priority rules, voice pre-empting data and data pre-empting voice, when the mean service times of voice and data are different.

A Model for Evaluating the Performance of an Integrated Circuit- and Packet-Switched Multiplex Structure

Recent papers have introduced a multiplexing structure for mixing voice and data traffic in an integrated telecommunications system. This structure utilizes a master frame format of a time division statistical multiplex facility. A certain portion of the frame is allocated to voice calls, and data traffic is assigned to the remaining frame capacity. To achieve a high transmission utilization, data are allowed to use any residual voice capacity momentarily available due to statistical variations in the voice traffic. The voice traffic is treated as a loss system and data packets are buffered. In this paper we derive exact analytical expressions for the key system perfomance measures, the probability of loss for voice calls, and the expected waiting time for data packets. Actually, two cases are considered, the one discussed above, called the movable boundary case, and one where the boundary is fixed; i.e., data are not allowed to utilize the residual voice capacity. The computational aspects of calculating actual numbers are discussed in some detail, and results are presented for typical cases.