Analysis of Quality of Service for WCDMA Network in Mwanza, Tanzania

This paper presents an analysis and evaluation of WCDMA network in both rural and urban areas of Mwanza, Tanzania. The analysis of data starts by collecting data through a drive test measurements by using TEMS Investigation tool. The parameters which are analyzed in this paper are such are Received Signal Code Power (RSCP), Transmitted Power (TX), Speech Quality Index (SQI) and the ration of received power to noise (Ec/N0). The data collected shows that only 24.02% of the region has got the good coverage, 23.24% has poor coverage and the 52.74% has a fair coverage. Also by using the basic Key Performance Indicators (KPI’s) we analyzed the data for the quality of service (QoS) of the area which shows only 27.61% of the region has good QoS, while the poor value recorded with 2.76% of the region.  We can use the analysis done in this work as a platform and benchmark to aid in the system optimization for telecoms services providers improved performance in the region. Keywords: WCDMA, Received Signal Code Power, Coverage and Quality of Servic

Analysis of Quality of Service for WCDMA Network in Mwanza, Tanzania

A research article was published by Journal of Information Engineering and Applications Vol.5, No.9, 2015This paper presents an analysis and evaluation of WCDMA network in both rural and urban areas of Mwanza, Tanzania. The analysis of data starts by collecting data through a drive test measurements by using TEMS Investigation tool. The parameters which are analyzed in this paper are such are Received Signal Code Power (RSCP), Transmitted Power (TX), Speech Quality Index (SQI) and the ration of received power to noise (Ec/N0). The data collected shows that only 24.02% of the region has got the good coverage, 23.24% has poor coverage and the 52.74% has a fair coverage. Also by using the basic Key Performance Indicators (KPI’s) we analyzed the data for the quality of service (QoS) of the area which shows only 27.61% of the region has good QoS, while the poor value recorded with 2.76% of the region. We can use the analysis done in this work as a platform and benchmark to aid in the system optimization for telecoms services providers improved performance in the region

Large Granularity Cache Coherence for Intermittent Connectivity

To function in mobile computing environments, distributed file systems must cope with networks that are slow, intermittent, or both. Intermittence vitiates the effectiveness of callback-based cache coherence schemes in reducing client-server communication, because clients must validate files when connections are reestablished. In this paper we show how maintaining cache coherence at a large granularity alleviates this problem. We report on the implementation and performance of large granularity cache coherence for the Coda File System. Our measurements confirm the value of this technique. At 9.6 Kbps, this technique takes only 4 -- 20% of the time required by two other strategies to validate the cache for a sample of Coda users. Even at this speed, the network is effectively eliminated as the bottleneck for cache validation