Finite-state Markov channel-a useful model for radio communication channels

Wang, Hong Shen; Moayeri, Nader

doi:10.1109/25.350282

Cited by 1,412 publications

(79 citation statements)

References 17 publications

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“…Assuming slow fading conditions so that transitions happen only between adjacent states, the probability of transition exceeding two consecutive states is zero (as in [7] and prior work [17][18][19][20]), i.e.,…”

Section: Problem Formulationmentioning

confidence: 98%

“…Note that the Pr{Delay [ D max } in (18) and the Pr{Q(t) C U} in (19) express the probability that at a given time slot one or more packets in the buffer are expected to violate the delay bound or exceed the threshold U respectively. Instead what is needed in calculating n 0 is the probability P d that a given packet will violate the delay bound (also known as the fraction of the workload lost).…”

Section: Large Deviations Approximation Of P Dmentioning

confidence: 99%

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A cross-layer optimized adaptive modulation and coding scheme for transmission of streaming media over wireless links

Vassilaras

2009

Wireless Netw

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In this paper, a novel cross-layer Adaptive Modulation and Coding scheme that optimizes the overall packet loss (by both transmission errors and excessive delays) probability under a given arrival process is developed. To this end, an improved Large Deviations approximation for the fraction of packets that suffer from excessive queuing delay is proposed. This approximation is valid for G/G/1 queues with infinite buffers that are driven by stationary arrival and service processes which satisfy certain conditions. Such models can capture the time correlations in the amount of traffic generated by streaming media sources and the time varying service capacity of a wireless link. Through numerical examples, the proposed AMC policy is shown to achieve a significant reduction in the overall packet loss rate compared to previously proposed schemes. This algorithmic performance gain can be translated into a sizeable decrease in the required transmit power or an analogous increase in the rate of the arrival process, subject to a given maximum packet loss rate Quality of Service constraint. Furthermore, the proposed AMC policy can be combined with ARQ in order to achieve an even lower overall packet loss probability.

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Section: Problem Formulationmentioning

confidence: 98%

Section: Large Deviations Approximation Of P Dmentioning

confidence: 99%

A cross-layer optimized adaptive modulation and coding scheme for transmission of streaming media over wireless links

Vassilaras

2009

Wireless Netw

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“…Numerous studies have shown that such channels can be described by a Markov model to capture such bursty error nature. In this paper, a finite state Markov Channel (FSMC) model, which has been widely adopted in various related research [21][22][23], is adopted to model the timevarying wireless channel of each SS. In addition, when the channel model is constructed, the discrete adaptive modulation and coding defined in the IEEE 802.16 standard is taken into account, where the received signal-to-noise ratio (SNR) is divided into several disjoint regions, based on a set of boundaries.…”

Section: Wireless Channel Modelmentioning

confidence: 99%

“…When the obtained initial state probability vectorH 0 is obtained, the average number of steps for an SDU to absorption is derived from (21), and SDU delivery delay is derived from (18).…”

Section: Analysis Of Delivery Delay Of An Sdu/packetmentioning

confidence: 99%

Performance analysis of the cumulative ARQ in IEEE 802.16 networks

Hou

She

et al. 2008

Wireless Netw

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In this paper, we study the performance of the cumulative Automatic Repeat reQuest (ARQ) in IEEE 802.16 networks. An analytical model is developed to investigate some important performance metrics, such as protocol data unit (PDU) delivery delay, service data unit (SDU) delivery delay, and goodput. A general scheduling scheme and the flexible retransmission of lost PDUs are jointly considered in the analytical model, which provides a more valuable and practical guideline for the system design and performance evaluation. Extensive simulations are conducted to demonstrate the impacts of different operational parameters on the performance metrics and verify the accuracy of the analytical model.

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“…In addition, the EWMA of the rate (or smoothed rate),r k , has been used in [27,28] as a measure of the quality of service. EWMA is also used as a metric in statistical quality control [29].…”

Section: Link Modelmentioning

confidence: 99%

Adaptive access and rate control of CSMA for energy, rate, and delay optimization

Khodaian

Pérez

Khalaj

et al. 2012

J Wireless Com Network

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In this article, we present a cross-layer adaptive algorithm that dynamically maximizes the average utility function. A per stage utility function is defined for each link of a carrier sense multiple access-based wireless network as a weighted concave function of energy consumption, smoothed rate, and smoothed queue size. Hence, by selecting weights we can control the trade-off among them. Using dynamic programming, the utility function is maximized by dynamically adapting channel access, modulation, and coding according to the queue size and quality of the time-varying channel. We show that the optimal transmission policy has a threshold structure versus the channel state where the optimal decision is to transmit when the wireless channel state is better than a threshold. We also provide a queue management scheme where arrival rate is controlled based on the link state. Numerical results show characteristics of the proposed adaptation scheme and highlight the trade-off among energy consumption, smoothed data rate, and link delay.

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Finite-state Markov channel-a useful model for radio communication channels

Cited by 1,412 publications

References 17 publications

A cross-layer optimized adaptive modulation and coding scheme for transmission of streaming media over wireless links

A cross-layer optimized adaptive modulation and coding scheme for transmission of streaming media over wireless links

Performance analysis of the cumulative ARQ in IEEE 802.16 networks

Adaptive access and rate control of CSMA for energy, rate, and delay optimization

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