In this paper we develop a Markov chain modeling framework for throughput/delay analysis of data services over cellular voice networks, using dynamic channel stealing method. Some eeective approximation techniques are also proposed and veriied for simpliication of modeling analysis. Our study identiies the average voice call holding time as the dominant factor to aaect data delay performance. E...

development of water resources projects are recognized as a basis of the development planning in the water resources sector. in addition to the quality of output results, following the schedule , continuous documentation and evaluation during the project is the one of the major challenges. in order to improve water study framework with high quality and scheduling and reduce the study process, t...

In recent years, there has been considerable interest in the use of CDMA in mobile communications. Bit error rate is one of the most important parameters in the evaluation of CDMA systems. In this paper, we develop a technique to find an accurate approximation to the probability of bit error for asynchronous direct–sequence code division multiple–access (DS/CDMA) systems by modeling the multipl...

4 Literature review 6 4.1 Review of fixed to mobile substitution in developed countries for broadband services . . . . . 6 4.2 Measurement of fixed and mobile substitution in developing countries . . . . . . . . . . . . . 7 4.3 Evaluations of open access policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.4 Methodological problems with empirical studies on FMS and ope...

Grid data sources may have schemaand data-level conflicts that need to be addressed using data transformation and integration technologies not supported by the current generation of Grid data access and querying middleware. We present an architecture that combines Grid data access and distributed querying with fine-grained data transformation/integration technologies, and the results of a query...

A comprehensive requirements engineering (RE) method was evaluated to assess its value for practitioners. A literature search brought up two evaluation frameworks that were used as the basis for both theoretical and empirical evaluations; one of the frameworks was used as such while a lightweight adaptation was developed from the other one. The different assessments proved to complement each ot...