Adaptive modulation and coding in 3G wireless systems

Yang, Jing; Tin, N.; Khandani, Amir K.

doi:10.1109/vetecf.2002.1040403

Cited by 28 publications

(17 citation statements)

References 11 publications

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“…B < x < 2th max (13) Note that when x = B, the transmission rate and wireless loss probability also depend on the parameter α which needs to be calculated. Based on the philosophy of DRWL, we assume PER 1 ≤ PER 2 < 1 in which case the TCP receivers get service from both regimes and r 1 ≤ r 2 .…”

Section: Fixed-point Analytical Model Of Drwlmentioning

confidence: 99%

“…On the other hand, the MCS with the smallest index, i.e., m = 0, is the most conservative MCS in the same set with the lowest spectral efficiency and again with the lowest block error rates. Typically, one of the key LA mechanisms known as adaptive modulation and coding (AMC) is employed in existing wireless communication standards to choose the best possible MCS as a function of varying channel conditions on the basis of channel state information (CSI) which is representative of the instantaneous condition of the wireless link [12,13]. This optimization problem is involved in maximizing the spectral efficiency of the wireless link under certain block error rate constraints.…”

Section: Introductionmentioning

confidence: 99%

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A novel queue-aware wireless link adaptation mechanism and its fixed-point analytical model

Öztürk

Akar

2015

J Wireless Com Network

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A point-to-point (PTP) wireless link is studied that carries long-lived TCP flows and is controlled with active queue management (AQM). A cross-layer queue-aware adaptive modulation and coding (AMC)-based link adaptation (LA) mechanism is proposed for this wireless link to improve the TCP-level throughput relative to the case where AMC decisions are made based solely on the physical layer (PHY) parameters. The proposed simple-to-implement LA mechanism involves the use of an aggressive modulation and coding scheme (MCS) with high spectral efficiency and high block error rates when the queue occupancy exceeds a certain threshold, but otherwise a relatively conservative MCS with lower spectral efficiency and lower block error rates. A fixed-point analytical model is proposed to obtain the aggregate TCP throughput attained at this wireless link and the model is validated by ns-3 simulations. Numerical experimentation with the proposed analytical model applied to an IEEE 802.16-based wireless link demonstrates the effectiveness of the proposed queue-aware LA (QAWLA) mechanism in a wide variety of scenarios including cases where the channel information is imperfect. The impact of the choice of the queue occupancy threshold of QAWLA is extensively studied with respect to the choice of AQM parameters in order to provide engineering guidelines for the provisioning of the wireless link.

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Section: Fixed-point Analytical Model Of Drwlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A novel queue-aware wireless link adaptation mechanism and its fixed-point analytical model

Öztürk

Akar

2015

J Wireless Com Network

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“…By an appropriate combination of the modulation order and channel code rate, we can design a set of modulation and coding schemes (MCSs), from which an MCS is selected in an adaptive fashion in each transmission-time interval (TTI) in order to maximize system throughput under different channel conditions. The use of AMC yields a rich variety of scheduling strategies [25]; [12]. In practice, a commonly encountered constraint is that the probability of erroneous decoding of a Transmission Block should not exceed some threshold value [11].…”

Section: Introductionmentioning

confidence: 99%

Simulated Annealing and Multiuser Scheduling in Mobile Communication Networks

Kwan¹,

Aydın²,

Leung³

2012

Simulated Annealing - Single and Multiple Objective Problems

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“…They maximize bandwidth efficiency through selecting an optimal combination from the modulation and coding scheme (MCS), where the resolution depends on the channel state information. Consequently, every modulation and code scheme will be linked to a constellation size and coding rate respectively [2]. AMC allows spectrally efficient transmission in function of time-…”

mentioning

confidence: 99%

“…The AMC technique is designed to track channel variations and then change the modulation and/or coding scheme. The goal is to yield a higher throughput by transmitting with high information rates under favorable channel conditions and by reducing the information rate in response of channel degradation [2]- [5]. In case of high fading, for example, the size of the signal constellation is reduced to improve the fidelity.…”

mentioning

confidence: 99%

Analytical Comparison of the Performance of Adaptive Modulation and Coding in Wireless Network Under Rayleigh Fading

Bandiri

Braga

Spadoti

2017

J. Microw. Optoelectron. Electromagn. Appl.

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I. INTRODUCTION The rapid growth in the use of information networks, increasing the data rates, led to the necessity to implement novel technique aiming to improve wireless networks communication performance. In conventional communication systems, transmission characteristics are adjusted for the worst channel setting behavior in order to provide a lower limit to a specific error rate [1]. Adaptive Modulation and Coding (AMC), which includes both adaptive modulation (AdM) and adaptive Forward Error Correction (AdFEC) operating together, have been developed to face fading and enhance the wireless systems performance. They maximize bandwidth efficiency through selecting an optimal combination from the modulation and coding scheme (MCS), where the resolution depends on the channel state information. Consequently, every modulation and code scheme will be linked to a constellation size and coding rate respectively [2]. AMC allows spectrally efficient transmission in function of time-

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Adaptive modulation and coding in 3G wireless systems

Cited by 28 publications

References 11 publications

A novel queue-aware wireless link adaptation mechanism and its fixed-point analytical model

A novel queue-aware wireless link adaptation mechanism and its fixed-point analytical model

Simulated Annealing and Multiuser Scheduling in Mobile Communication Networks

Analytical Comparison of the Performance of Adaptive Modulation and Coding in Wireless Network Under Rayleigh Fading

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