Hybrid ARQ and adaptive modulation and coding schemes for high speed downlink packet access

Döttling, M.; Michel, J.; Raaf, Bernhard

doi:10.1109/pimrc.2002.1045192

Cited by 45 publications

(17 citation statements)

References 5 publications

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“…We consider 5 MCS levels shown in Table II and the link layer simulation is executed using the FER data in [9]. We assume that the power consumption of UEs transmitting the CQI value is 1.5 times greater than that of UEs that do not transmit the CQI value.…”

Section: Simulation Configuration and Resultsmentioning

confidence: 99%

Channel Adaptive CQI Reporting Schemes for UMTS High-Speed Downlink Packet Access

Jeon¹,

Cho²

2006

IEEE Vehicular Technology Conference

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Abstract-HSDPA (High-Speed Downlink Packet Access) is an evolved UMTS packet scheme that delivers increased user peak data rates and supports quality of service. A key technique supporting HSDPA is adaptive modulation and coding (AMC), in which the modulation scheme and the coding rate are changed adaptively according to the downlink channel quality reported by the user equipment (UE). Therefore, the channel quality indication (CQI) reporting scheme is directly related to the accuracy of AMC and the performance of HSDPA. In the current specification of HSDPA, each UE must periodically report to Node B the CQI. Hence, UE must report the same CQI value repeatedly when the channel quality is unchanged. Obviously, this is the waste of the UE's battery power. To solve this problem, we propose channel adaptive CQI reporting schemes in which UEs report the CQI value intelligently using information about channel quality. With the proposed schemes, the battery capacity of UEs can be conserved and the uplink interference can be lowered by filtering off redundant CQI reports or the transmission error rate can be lowered by fast CQI reports.

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Section: Simulation Configuration and Resultsmentioning

confidence: 99%

Channel Adaptive CQI Reporting Schemes for UMTS High-Speed Downlink Packet Access

Jeon¹,

Cho²

2006

IEEE Vehicular Technology Conference

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“…Let the single-code bit rate rj for MCS j be r'j = WR(J) log2 Mj, 1 < j < J, 9 (1) where W is the chip rate, g is the spreading factor, J is the number of available MCSs, R(j) is the code rate for MCS j, and Mj is the number of points in the modulation constellation for MCS j. The downlink received signal-to-interference ratio (SIR) is hPT I' (2) where h is the path gain between the base station (BS) and the mobile station (MS), PT is the transmit power from BS to MS, and I represents the interference and noise power at the MS.…”

Section: Problem Formulationmentioning

confidence: 99%

A Power Adjustment Scheme for Improving Outage Probability in a CDMA System

Kwan

Leung

2007

2007 Second International Conference on Communications and Networking in China

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A statistical power adjustment scheme for systems employing adaptive modulation and coding as well as multicodes is proposed. The scheme adjusts the transmit power level, based on the statistics of the received signal-to-interference ratio, in order to achieve a target bit rate outage probability. It is shown that the required power adjustment can differ greatly depending on the channel parameter values, even though without power adjustment these values support the same average bit rate.

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“…HSDPA has been developed to improve the available data rate on the downlink of UMTS. Details of HSDPA operation can be found in [26][27][28][29][30]. In broad terms, the HSDPA link is a shared downlink channel where users are allowed to use different modulation and channel coding schemes depending on their instantaneous propagation conditions.…”

Section: Simulation Studymentioning

confidence: 99%

A multimedia traffic modeling framework for simulation-based performance evaluation studies

Golaup

Aghvami

2006

Computer Networks

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Hybrid ARQ and adaptive modulation and coding schemes for high speed downlink packet access

Cited by 45 publications

References 5 publications

Channel Adaptive CQI Reporting Schemes for UMTS High-Speed Downlink Packet Access

Channel Adaptive CQI Reporting Schemes for UMTS High-Speed Downlink Packet Access

A Power Adjustment Scheme for Improving Outage Probability in a CDMA System

A multimedia traffic modeling framework for simulation-based performance evaluation studies

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