Proceedings ArticleDOI
Performance of fast Node B scheduling and L1 HARQ schemes in WCDMA uplink packet access
Claudio Rosa,J. Outes,K. Dimou,Troels B. Sorensen,Jeroen Wigard,Frank Frederiksen,Preben Mogensen +6 more
- Vol. 3, pp 1635-1639
TLDR
The performance of WCDMA uplink systems deploying Node B based scheduling and fast hybrid ARQ (HARQ) retransmission protocols is studied and the potential capacity gain and combined gain obtained are estimated.Abstract:Â
The performance of WCDMA uplink systems deploying Node B based scheduling and fast hybrid ARQ (HARQ) retransmission protocols is studied With fast Node B scheduling and fast L1 HARQ schemes, both the uplink packet scheduling functionality and the entity controlling the retransmission mechanism are moved from the radio network controller (RNC) to the Node B A Node B scheduling algorithm is proposed to increase the utilisation of the allocated uplink resources; this is achieved by making use of already existing information about the transmitted data rate of the UEs Moreover, fast L1 HARQ schemes make retransmissions less costly from a delay perspective compared to an equivalent RNC controlled ARQ mechanism Therefore, the physical channel can be operated with somewhat higher error probability, which converts directly into enhanced system capacity The potential capacity gain from fast L1 Node B controlled HARQ strategies and fast Node B scheduling operation is estimated by means of an analytical study, as well as system level simulations The combined gain obtained by jointly deploying fast Node B scheduling and fast L1 HARQ retransmission schemes is estimated in the range from 25% to 60%, depending on the mobility scenario Fast Node B scheduling and L1-based HARQ protocols are included in 3GPP's "Feasibility Study for Enhanced Uplink for UTRA FDD" (TR 25896 V112, 2003)read more
Citations
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Patent
Method and apparatus for dynamically adjusting data transmission parameters and controlling h-arq processes
TL;DR: In this paper, a wireless communication system including a wireless transmit/receive unit (WTRU) (102) which transfers data to a Node-B (104), data transmission parameters such as modulation and coding (MCS) and transport block set (TBS) size are dynamically adjusted on a transmission time interval (TTI) basis.
Patent
Method and apparatus for assigning hybrid-automatic repeat request processes
Stephen E. Terry,Guodong Zhang +1 more
TL;DR: In this article, a method and apparatus for assigning ARQ/H-ARQ processes in a wireless transmit/receive unit (WTRU) to support enhanced uplink (EU) data transmissions is presented.
Journal ArticleDOI
An Efficient Resource Allocation Strategy for Future Wireless Cellular Systems
TL;DR: This paper proposes a concept called load matrix (LM) which facilitates joint management of interference within and between cells for allocation of radio resources and shows significant improvement in the resource utilization and overall network performance.
Proceedings ArticleDOI
Combined time and code division scheduling for enhanced uplink packet access in WCDMA
TL;DR: While the MTPE scheduler maximises cell throughput at the cost of at low degree of fairness between users, the CSAFT algorithm is shown to offer an appealing trade-off between users' fairness and throughput maximisation.
Proceedings ArticleDOI
High Speed Uplink Packet Access Evaluation by Dynamic Network Simulations
TL;DR: A dynamic system simulator is introduced for studying HSUPA system performance and the effect on the cell throughput of increasing the BLER target and the target number of transmissions is analyzed.
References
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BookDOI
WCDMA for UMTS: Radio Access for Third Generation Mobile Communications
Harri Holma,Antti Toskala +1 more
TL;DR: In this article, the authors provide a complete picture of the Wideband CDMA (Code Division Multiple Access) air interface of the 3rd generation cellular systems - UMTS (Universal Mobile Telecommunications Systems).
Book
WCDMA for UMTS
Harri Holma,Antti Toskala +1 more
TL;DR: In this article, the authors present the key parts of the 3GPP/WCDMA standard and provide guidelines for its efficient use and present network dimensioning and coverage and capacity planning of WCDMA.
Proceedings ArticleDOI
Performance and modeling of WCDMA/HSDPA transmission/H-ARQ schemes
Frank Frederiksen,Troels Kolding +1 more
TL;DR: Based on an extensive simulation campaign, methods to map the link level performance of the HSDPA retransmission schemes into a low-complexity representation suitable for network level evaluation are presented.
Proceedings ArticleDOI
Uplink admission control and soft capacity with MUD in CDMA
Harri Holma,J. Laakso +1 more
TL;DR: In this paper, the authors presented an analysis of the WCDMA uplink capacity with admission control and multiuser detection (MUD), and showed that up to 50% more users with 144 kbps real-time data can be supported than with a noninterference based admission control approach.
Journal ArticleDOI
Performance of hybrid ARQ schemes for the fading channel
TL;DR: In this paper, the authors define and adopt a theoretical method, based on the sphere-packing bound, for evaluating and comparing the achievable performance of different hybrid automatic repeat request schemes for the fading channel.
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