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Evaluation of downlink shared channel for UMTS
2002 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The third generation mobile communication systems are based on Code Division Multiple Access (CDMA). The wideband CDMA (WCDMA) technology is the European standard and will be a world standard for third generation cellular systems. These systems will in addition to speech also support transmission of data. As data traffic is generally very bursty, a transport channel that takes these characteristics into consideration is defined. The aim is to utilize the limiting system resources, codes and power, more efficiently. This can be achieved by letting users with relatively small activities use short leases on a common channel. In this thesis the performance of such a channel, the Downlink Shared Channel (DSCH) has been studied and evaluated by means of system level radio network simulations. The results are compared to the performance of dedicated channels (DCH) with channel switching. Results show that a solution based on DSCH utilizes much less code resources than DCH indicating that DSCH could be beneficial in situations where the code resources are the limiting factor for capacity. The power consumption on DSCH is however considerably higher than on DCH. It was also shown that the peak bitrates are much lower on DSCH than on DCH.

Place, publisher, year, edition, pages
Keyword [en]
Technology, UMTS, 3G, WCDMA
Keyword [sv]
URN: urn:nbn:se:ltu:diva-50112ISRN: LTU-EX--02/158--SELocal ID: 765590a4-43f4-44bb-a309-b2ab19216743OAI: diva2:1023469
Subject / course
Student thesis, at least 30 credits
Educational program
Computer Science and Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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