Adaptive Retransmission Protocol Based on Mutual Information

Alkhoder, Assal; Assimi, Abdel-Nasser; Alhariri, Mohammad

doi:10.14257/ijfgcn.2018.11.2.05

Cited by 1 publication

(4 citation statements)

References 21 publications

(60 reference statements)

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“…The initial coding rates adopted in the simulation are chosen from the literature where they are in convenience with the note mentioned in sec.3.2. To find SNR switching thresholds between MCSs, we resort to the same procedure followed in our previous work in [14] for the MCSs whose initial coding rates are 1s. Then, in order to find SNR switching threshold for the MCSs whose coding rate more than 1, we use the relation: [15]…”

Section: Numerical Resultsmentioning

confidence: 99%

“…In other words, initial MCS schemes are associated with the SNR regions, and the SNR switching thresholds must be determined between these regions. The proposed method to determine these thresholds between MCSs is described in our previous publication in [14]. SNR regions and thresholds are obtained as in [14], and they will be tabulated in section 6.…”

Section: System Model and Assumptionsmentioning

confidence: 99%

“…is described in our previous work in [14]. The same procedure is used here to get the SNR switching thresholds values for different MCSs as mentioned above.…”

Section: A Physical Layermentioning

confidence: 99%

“…To find the throughput, we need to evaluate ARIR ( ) in (14) using the in (15) (19) where [ ̅̅̅̅ , 2 ] is the Gaussian distribution with mean ̅̅̅̅ and variance 2 .…”

Section: A Throughput For Adaptive Rate Ir-harq (Arir-harq)mentioning

confidence: 99%

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A New Adaptive Rate IR-HARQ Combining with AMC

Alkhoder

Assimi

Alhariri

2018

JCOMSS

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In this paper, we analyze a new cross layer combining scheme of adaptive modulation and coding (AMC) at the physical layer and hybrid automatic repeat request (HARQ) protocol at the data link layer. Our purpose is to improve the performance of the communication system in terms of throughput and errors. We propose a new adaptive HARQ protocol based on the estimated mutual information in addition to signal to noise ratio as channel state information (CSI), which are unavailable at the receiver. Unlike the traditional protocols, the transmitter is aware of the transmission mode only, not the instantaneous CSI, which minimize the load on the feedback channel. The transmission is supposed to be done over block fading channel. Mathematical formulation is improved for the performance criterions, in terms of throughput of the new HARQ, average number of transmissions and the spectral efficiency of the AMC/HARQ. The comparison with the traditional variable rate HARQ shows that our new adaptive HARQ protocol provides an upper bound for the throughput. In addition, the simulation results show that a small number of transmissions is enough to reach the maximum spectral efficiency while maintaining the error probabilities under certain acceptable level.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: System Model and Assumptionsmentioning

confidence: 99%

“…is described in our previous work in [14]. The same procedure is used here to get the SNR switching thresholds values for different MCSs as mentioned above.…”

Section: A Physical Layermentioning

confidence: 99%

“…To find the throughput, we need to evaluate ARIR ( ) in (14) using the in (15) (19) where [ ̅̅̅̅ , 2 ] is the Gaussian distribution with mean ̅̅̅̅ and variance 2 .…”

Section: A Throughput For Adaptive Rate Ir-harq (Arir-harq)mentioning

confidence: 99%

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