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High Speed Downlink Packet Access: WCDMA Evolution
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The HSDPA concept facilitates peak data rates exceeding 2 Mbps, and the cell throughput gain over previous UTRA-FDD releases has been evaluated to be in the order of 50-100% or even more, highly dependent on factors such as the radio environment and the service provision strategy of the network operator.Abstract:
This article gives an overview of the high speed downlink packet access (HSDPA) concept; a new feature which is coming to the Release 5 specifications of the 3GPP WCDMA/UTRA-FDD standard. To support an evolution towards more sophisticated network and multimedia services, the main target of HSDPA is to increase user peak data rates, quality of service, and to generally improve spectral efficiency for downlink asymmetrical and bursty packet data services. This is accomplished by introducing a fast and complex channel control mechanism based on a short and fixed packet transmission time interval (TTI), adaptive modulation and coding (AMC), and fast physical layer (L1) hybrid ARQ. To facilitate fast scheduling with a per-TTI resolution in coherence with the instantaneous air interface load, the HSDPA-related MAC functionality is moved to the Node-B. The HSDPA concept facilitates peak data rates exceeding 2 Mbps (theoretically up to and exceeding 10 Mbps), and the cell throughput gain over previous UTRA-FDD releases has been evaluated to be in the order of 50-100% or even more, highly dependent on factors such as the radio environment and the service provision strategy of the network operator.read more
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TL;DR: The third-generation WCDMA standard has been enhanced to offer significantly increased performance for packet data and broadcast services through the introduction of high-speed downlink packet access, enhanced uplink, and multimedia broadcast multicast services.
Packet Scheduling and Quality of Service in HSDPA
TL;DR: This document breaches copyright and will be removed from access immediately and investigate the claim.
Proceedings ArticleDOI
Performance of VoIP on HSDPA
TL;DR: The downlink VoIP cell capacity on HSDPA is found to be in the range 72-104 users depending on whether the delay budget for the node-B scheduling and user reception equals 80 ms or 150 ms, respectively.
Proceedings Article
System Level Performance of the M-LWDF Scheduling Algorithm for Streaming Services in HSDPA
TL;DR: The present paper analyzes the paradigm of providing streaming services over HSDPA and finds that the operation of the packet scheduling functionality completely determines the node B queuing streaming packets prior to their transmission through the radio interface, and therefore the scheduler plays a key role in the satisfaction of the delay jitter constraint.
References
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Asymptotic analysis of proportional fair algorithm
TL;DR: A more general result for two classes of users with different fading characteristics is given-the user class with more fading variability gets more throughput with a lower fraction of time transmitting.
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Yile Guo,H. Chaskar +1 more
TL;DR: A framework for quality of service provisioning over the air interfaces in future wireless networks, including 3G enhancement and 4G mobile networks, is presented, which incorporates the paradigm of service classes, in conjunction with fair resource allocation and air interface congestion resilience, while allocating air interface bandwidth to mobile users.
Adaptive Modulation schemes for MIMO HSDPA
Javier R. Fonollosa,M. Heikkilä,Xavier Mestre,A. Pages,A. Pollard,Laurent Schumacher,Lars Torsten Berger,Ami Wiesel,J. Ylitalo +8 more
TL;DR: The I-METRA project is focused on MIMO antenna processing techniques which arenecessarily also related to the evolution of other procedures, such as Adaptive Modulation and Coding (AMC) or Hybrid Automatic Repeat on Request (H-ARQ), in order to include adaptive MIMo techniques inthe HS-DSCH structure.
Proceedings ArticleDOI
Performance of downlink shared channels in WCDMA radio networks
Ke Wang Helmersson,Gunnar Bark +1 more
TL;DR: A scheme that combines high rate DSCH and medium rate DCH is proposed, which achieves equally good packet data bit rate as the pure DSCH scheme, but with considerably less base station transmission power.
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