Cross-Layer Modeling of Capacity of UMTS/HSDPA Networks Under Dynamic User Setting

Chahed, Tijani; Dirani, Mariana

doi:10.1109/vtcf.2006.444

Cited by 4 publications

(1 citation statement)

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“…The choice that has been made in CDMA-based systems to accompany the arrival of data-oriented applications in the third generation mobile systems is to offer larger bit rates in the downlink where most of these applications are expected to be. And so the overall system became asymmetric, with lower rate uplink, mostly based on Dedicated CHannels (DCHs), suitable for streaming applications such as voice, and higher bit rate downlink, implementing High Data Rate (HDR) [1]/High-Speed Downlink Packet Access (HSDPA) [2], and which offers packet-based applications a high-rate shared medium.…”

Section: Introductionmentioning

confidence: 99%

Joint uplink and downlink capacity considerations in admission control in multiservice CDMA/HSDPA systems

Altman¹,

Chahed²,

Elayoubi³

2007

Proceedings of the 2nd International ICST Conference on Performance Evaluation Methodologies and Tools

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TCP-based data flows generate packets and ACKs in two directions, be it in the wireline or wireless networks. In the latter case, packets are typically found in the downlink whereas ACKs are in the uplink. Those two links are asymmetric in the case of CDMA-based High Data Rate (HDR)/High-Speed Downlink Packet Access (HSDPA) systems, the uplink being much slower than the downlink and thus, in some cases, restrictive in terms of the achievable throughput of the TCP flow. The aim of this work is to evaluate the performance of such a setting, in the presence of both streaming and elastic traffic, under a dynamic scenario where users arrive to the system and leave it after completion of their service. We specifically quantify the impact of the uplink on the overall performance of TCP and study the model variations according to several parameters such as load, file size and radio conditions 1 .

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Section: Introductionmentioning

confidence: 99%