Limiting HARQ Retransmissions in Downlink for PoorRadio Link in LTE

Kawser, Mohammad T.

doi:10.7763/ijiee.2012.v2.192

Cited by 6 publications

(4 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Kawser et al [29] looked at saving radio resources by limiting the maximum number of HARQ retransmissions. Their reasoning was that for nodes experiencing poor radio conditions having three retransmissions would not provide a successful retransmission or soft combining to recover the lost data.…”

Section: Harqmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Acknowledgments on Application Performance in 4G LTE Networks

Levasseur

Claypool

Kinicki

2015

Wireless Pers Commun

View full text Add to dashboard Cite

4G LTE is a new cellular phone network standard to provide both the capacity and Quality of Service (QoS) needed to support multimedia applications. Recent research in LTE has explored modifications to the current QoS setup, creating MAC layer schedulers and modifying the current QoS architecture. However, what has not been fully explored are the effects of LTE retransmission choices and capabilities on QoS.This thesis examines the impact of using acknowledgments to recover lost data over the wireless interface on VoIP, FTP and MPEG video applications. Issues explored include interaction between application performance, network transport protocols, LTE acknowledgment mode, and wireless conditions.Simulations show that LTE retransmissions improve FTP throughput by 0.1 to 0.8 Mb/s. With delay sensitive applications, like VoIP and video, the benefits of retransmissions are dependent on the loss rate. When the wireless loss rate is less than 20%, VoIP has similar performance with and without LTE retransmissions. At higher loss rates the use of LTE retransmissions adds degrading the VoIP quality by 71%.With UDP video, the choice of retransmissions or not makes little change when the wireless loss rates are less than 10%. With higher wireless loss rates, the frame arrival delay increases by up to 539% with LTE retransmissions, but the frame rate of the video decreases by up to 34% without those retransmissions.LTE providers should configure their networks to use retransmission policies appropriate for the type of application traffic. This thesis shows that VoIP, FTP and video require different configurations in the LTE network layers.

show abstract

Section: Harqmentioning

confidence: 99%

“…Kawser et al [29] looked at how the maximum number of MAC layer retransmissions do not always improve the total amount of data lost. Makidis [30] With delay sensitive applications, like VoIP and video, the benefits of retransmissions are dependent on the loss rate.…”

Section: Introductionmentioning

confidence: 99%

Impact of Acknowledgments on Application Performance in 4G LTE Networks

Levasseur

Claypool

Kinicki

2015

Wireless Pers Commun

View full text Add to dashboard Cite

show abstract

“…Related works using link level results include: SNR to Channel Quality Indicator (CQI) mapping for different MIMO settings [4], limiting downlink Hybrid Automatic Repeat Request (HARQ) retransmission in poor link [5]. Radio network planning for Dhaka city-coverage and capacity analysis approach has been suitably presented in [6][7].…”

Section: Related Workmentioning

confidence: 99%

A Quantitative Analysis of Some Key LTE Radio Performance Metrics

al.¹

2014

IJCNT

View full text Add to dashboard Cite

This paper provides analyses of the performance of radio parameters necessary for efficient Long term evolution (LTE) radio planning: through numerous simulations in different transmission modes and network scenario. It mainly highlights the throughput, Block Error Rate (BLER) with respect to Signal-to-Noise Ratio (SNR) along with changed UE mobility on the physical layer and in network context covering different simulation environments.

show abstract

“…For example, normally in 802. 11 WiFi system the number of maximum allowed retransmissions is L = 7 (for short packets), meanwhile some literature suggests to limit it for LTE in the downlink to save the radio resources for user-equipments (UE) with poor radio link [12]. In the last few years Massive MIMO (also known as very large Multiple-Input Multiple-Output, or full-dimension MIMO) has been an interesting technology to enhance wireless system performance, especially by using beam-forming to reduce the interference among users.…”

Section: Introductionmentioning

confidence: 99%