In the near future low earth orbit (LEO) satellite communication networks will partially substitute for fixed terrestrial multimedia networks especially in sparsely populated areas. Unlike fixed terrestrial networks, ongoing calls may be dropped if satellite channels are shadowed. Therefore, in most LEO satellite communication networks more than one satellite need to be simultaneously visible i...

The following paper introduces a model for the stochastic millimeter-wave indoor radio channel. This model relates the stochastic properties of the radio channel to the underlying geometry of the investigated environment. The geometric simplicity of the millimeter-wave channel allows examining fundamental deterministic properties of the wave propagation behavior in environments of predefined ra...

Our investigation is focused on the binary capacity improvement of the Down Link Channel in UMTS (Universal Mobile Telecommunication System). For a WCDMA (Wideband Code Division Multiple Access) system, the use of different channels at the same time, by many users, is possible because these physical channels are orthogonal to each other. For UMTS, these orthogonal codes are called “OVSF (Orthog...

Automatic Meter Reading (AMR) is the remote collection of consumption data from customer’s utility meters over telecommunications, radio, power line and other links. AMR provides water, electric and gas utility service companies the opportunity to streamline metering, billing and collection activities, increase operational efficiency and improve customer service. The AMR system consists of thre...

We present an analytical framework to model the sending queue of an IEEE 802.11 EDCA wireless station that uses the TXOP limit MAC parameter to send more than one packet in each transmission opportunity. An application of this model to the estimate of packet delay from the number of packets received at the AP in each transmission is presented. This method is well suited to be deployed in an inf...

This paper proposes a multiple access algorithm for broadband satellite communication networks. The access channel is the slotted Aloha contention channel. The performance of the algorithm is analyzed considering user terminal time uncertainty, power uncertainty, minimizing co-channel interference as well as non-perfect feedback information from the central receiver. It is shown that reliable a...

This is the fourth annual special issue of Industrial and Corporate Change devoted to research on telecommunications policy and strategy. The papers in this special issue represent research discussed at the annual conference of the Consortium for Research on Telecommunications Policy and Strategy, held at the University of Michigan Business School in Ann Arbor, during June, 1998. The Consortium...

Moving toward third millennium is characterized by capabilities in transforming human life. Specially, development of information technologies in everyday life lead to great changes in communication tools andour current understanding ofurban social life. Indeed, telecommunications because of independency from time—space constraints, provide a new unlimited space for social interactions in globa...

The paper investigated the impact of leadership’s influence on strategy implementation at a stock-exchange listed communications service provider company in Botswana, Botswana Telecommunications Corporation (BTC). Following granting ethical approvals, an online questionnaire was distributed to 58 BTC employees offices across country. pilot testing self-developed data-gathering instrument, data ...