A Unified Model for the Performance Analysis of IEEE 802.11e EDCA

Hui, Jie; Devetsikiotis, Michael

doi:10.1109/tcomm.2005.855013

Cited by 179 publications

(97 citation statements)

References 17 publications

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“…Research developed in [21], [22], [23], and [24] account for additional modeling details and more precise definitions of the backoff process. The model developed in [25] is used to investigate multiple traffic classes, whereas [26] analyzes the quality-of-service (QoS) extensions defined in the novel 802.11e standard [2]. In [7], the energy consumption efficiency of the 802.11 MAC protocol has been analyzed.…”

Section: Related Workmentioning

confidence: 99%

Throughput Analysis and Measurements in IEEE 802.11 WLANs with TCP and UDP Traffic Flows

Bruno

Conti

Gregori

2008

IEEE Trans. on Mobile Comput.

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Abstract-There is a vast literature on the throughput analysis of the IEEE 802.11 media access control (MAC) protocol. However, very little has been done on investigating the interplay between the collision avoidance mechanisms of the 802.11 MAC protocol and the dynamics of upper layer transport protocols. In this paper, we tackle this issue from an analytical, simulative, and experimental perspective. Specifically, we develop Markov chain models to compute the distribution of the number of active stations in an 802.11 wireless local area network (WLAN) when long-lived Transmission Control Protocol (TCP) connections compete with finite-load User Datagram Protocol (UDP) flows. By embedding these distributions in the MAC protocol modeling, we derive approximate but accurate expressions of the TCP and UDP throughput. We validate the model accuracy through performance tests carried out in a real WLAN for a wide range of configurations. Our analytical model and the supporting experimental outcomes show that 1) the total TCP throughput is basically independent of the number of open TCP connections and the aggregate TCP traffic can be equivalently modeled as two saturated flows and 2) in the saturated regime, n UDP flows obtain about n times the aggregate throughput achieved by the TCP flows, which is independent of the overall number of persistent TCP connections.

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Section: Related Workmentioning

confidence: 99%

Throughput Analysis and Measurements in IEEE 802.11 WLANs with TCP and UDP Traffic Flows

Bruno

Conti

Gregori

2008

IEEE Trans. on Mobile Comput.

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“…Note that, in [12], it is proven that the mean value analysis for the average transmission probability calculated as in (17) matches the Markov analysis of [6].…”

Section: B Tc-specific Average Cycle Timementioning

confidence: 63%

Multimedia Capacity Analysis of the IEEE 802.11e Contention-Based Infrastructure Basic Service Set

Inan

Keceli

Ayanoğlu

2008

IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference

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We first propose a simple mathematical analysis framework for the Enhanced Distributed Channel Access (EDCA) function of the recently ratified IEEE 802.11e standard. Our analysis considers the fact that the distributed random access systems exhibit cyclic behavior. The proposed model is valid for arbitrary assignments of AC-specific Arbitration Interframe Space (AIFS) values and Contention Window (CW) sizes and is the first that considers an arbitrary distribution of active Access Categories (ACs) at the stations. Validating the theoretical results via extensive simulations, we show that the proposed analysis accurately captures the EDCA saturation performance. Next, we propose a framework for multimedia capacity analysis of the EDCA function. We calculate an accurate stationand AC-specific queue utilization ratio by appropriately weighing the service time predictions of the cycle time model for different number of active stations. Based on the calculated queue utilization ratio, we design a simple model-based admission control scheme. We show that the proposed call admission control algorithm maintains satisfactory user-perceived quality for coexisting voice and video connections in an infrastructure BSS and does not present over-or under-admission problems of previously proposed models in the literature.

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“…We assume that the probability of a station to initiate a transmission in a given backoff slot is constant in all its backoff slots [8], [11]. Since the channel access procedure of the tagged station regenerates itself for each new MAC frame, the complete service periods for MAC frames form renewal cycles in the renewal process.…”

Section: A Transmission and Collision Probabilitiesmentioning

confidence: 99%

Performance Analysis of Prioritized MAC in UWB WPAN With Bursty Multimedia Traffic

Liu

Ling

Shen

et al. 2008

IEEE Trans. Veh. Technol.

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Abstract-Ultra-wideband (UWB) is expected to be the transmission technology of future wireless personal area networks (WPANs), carrying various multimedia streams. Recently, the WiMedia Alliance has launched its standard for UWB WPANs, where the prioritized channel access (PCA) protocol is specified to provide differentiated medium access control (MAC) in a distributed manner. For time-sensitive multimedia traffic, the total delay, including the frame service time and the frame waiting time, is an important metric for quality-of-service (QoS) provisioning. This paper presents a performance analysis for the PCA protocol, considering the bursty nature of multimedia traffic. The mean frame service time and the mean waiting time of frames belonging to different traffic classes are obtained. Simulation results are given to verify the analytical results and demonstrate that the effect of the traffic differentiation mechanism in PCA is magnified when the interarrivals are highly bursty and correlated. In addition, the characteristics of multimedia traffic have a significant impact on the mean frame waiting time. Finally, our analytical model is applied to delay-sensitive traffic for QoS provisioning.Index Terms-Markov Modulated Poisson Process (MMPP), multimedia traffic, prioritized channel access (PCA), queueing analysis, ultra-wideband (UWB), wireless personal area networks (WPANs).

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A Unified Model for the Performance Analysis of IEEE 802.11e EDCA

Cited by 179 publications

References 17 publications

Throughput Analysis and Measurements in IEEE 802.11 WLANs with TCP and UDP Traffic Flows

Throughput Analysis and Measurements in IEEE 802.11 WLANs with TCP and UDP Traffic Flows

Multimedia Capacity Analysis of the IEEE 802.11e Contention-Based Infrastructure Basic Service Set

Performance Analysis of Prioritized MAC in UWB WPAN With Bursty Multimedia Traffic

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