7 research outputs found

    Effect of multiple simultaneous HSDPA users on HSDPA end-user performance for non-real time services in one cell system

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    HSDPA networks are currently being deployed; however, there is little knowledge about how these networks perform and behave, and which will the Quality of Service and Quality of Experience that users will achieve due to the fact that UEs share the downlink channel. Furthermore, HSDPA planning and dimensioning is being done through the traditional mechanisms to plan and dimension UMTS networks. These mechanisms do not provide, though, accurate results for HSDPA. This thesis will focus on doing progress in these two areas. A HSDPA simulator was built to find some answers. This simulator used a simplistic model to simulate the radio environment and HSDPA features at Node B. Besides, the simulator dynamically created web browsing traffic according to the traffic patterns specified by the 3GPP. Three main simulations were performed. First, the maximum number of HSDPA users that a HSDPA network can support was obtained for different mean cell throughputs. Results also showed that the relationship between the mean cell throughput and the maximum number of users is linear. Second, the effect of the amount of UEs in a HSDPA network was studied. Results showed how the network and end-user performance changed when the number of UEs differed from the maximum number of UEs. Simulations demonstrated that network and end-user performance decreases rapidly and significantly when the maximum number of UEs was exceeded. Finally, the mean session inter-arrival time was modified to observe how this traffic parameter affected the network and the end-user performance. Furthermore, different sets of number of UEs were used to find out any correlation between the number of UEs and the mean session inter-arrival time. Results showed how the mean session inter-arrival time was much more relevant for the network and end-user performance when the maximum number of UEs had been exceeded. Results will give a glimpse of how HSDPA can perform in real networks. Besides, this simulator can help operators and providers to plan and dimension HSDPA networks more accurately

    Final report on the evaluation of RRM/CRRM algorithms

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    Deliverable public del projecte EVERESTThis deliverable provides a definition and a complete evaluation of the RRM/CRRM algorithms selected in D11 and D15, and evolved and refined on an iterative process. The evaluation will be carried out by means of simulations using the simulators provided at D07, and D14.Preprin

    End-to-end key performance indicators in cellular networks

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    Masteroppgave i informasjons- og kommunikasjonsteknologi 2006 - Høgskolen i Agder, GrimstadThe continuing growth of customers taking advantage of the available services means greater load on the cellular network. Optimization is the key to ensure that the network can provide a reasonable level of service-quality. Service providers want to examine their network and be assured that their network is performing well. Teleca Wireless Solutions is a company that does this for service providers, and an end-toend test tool could be proven useful to examine the cellular networks overall performance from an end users point of view. To ensure that one has a tool that does this in an appropriate way, one must ensure, the application is based on testing the right key performance indicators for relevant services. Such services may be popular services like FTP and WEB. In this thesis, we have researched what affects the end users performance and performed practical end-to-end performance tests in cellular networks. Our goal is to define which key performance indicators are affecting the network’s performance at different network layers and for different services. We have paid special attendance to the high latency of the wireless links, and the delay introduced with the radio access bearer establishment. By measurements we have shown that the 3rd generation cellular network UMTS not surprisingly outperforms EDGE regarding commonly used services like HTTP/WEB and FTP. We have discovered that while TCP throughput is good when transferring large files over FTP, the high latency of the wireless link makes the HTTP performance bad compared to potential TCP throughput. Our work has concluded with which key performance indicators an end-to-end test application should measure for services as HTTP and FTP, to give an overall view of the cellular network’s performance. We have proposed enhancements to an already existing end-to-end test tool
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