System centric and user centric queueing models for IEEE 802.11 based wireless LANs

Medepalli, K.; Tobagi, Fouad A.

doi:10.1109/icbn.2005.1589666

Cited by 30 publications

(31 citation statements)

References 23 publications

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“…DCF supports best-effort service without guaranteeing any QoS and having no service differentiation [1] [2] [6] [7]. A wireless multimedia LAN approach has described in [3] [4]. A DCF with shortened CW for QoS support is described in [8].…”

Section: Introductionmentioning

confidence: 99%

Modified MAC for Priority Traffic with Slow Decrease of Contention Window and Reservation Based Packet Forwarding in IEEE 802.11 for QoS Provisioning

Puthal

Sahoo

Turuk

et al. 2008

2008 International Conference on Information Technology

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IEEE 802.11 lacks of the capability to support Quality of Services such as multimedia and real-time traffic properly. This paper presents a simple approach to enhance the multimedia real-time performance over the 802.11 WLAN by implementing a Quality of Service Manager (QoSM) for differentiating services with two queues on top of the 802.11 Medium Access controller. With slow decrease of contention window (SD) and reservation based packet forwarding. The proposed scheme is verified with the help of ns-2 and an improved performance for multimedia real-time service in the infrastructure-based WLAN with the coexistence of the non-real time traffic.

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Section: Introductionmentioning

confidence: 99%

Modified MAC for Priority Traffic with Slow Decrease of Contention Window and Reservation Based Packet Forwarding in IEEE 802.11 for QoS Provisioning

Puthal

Sahoo

Turuk

et al. 2008

2008 International Conference on Information Technology

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show abstract

“…Note that the analytical models of [29]- [35] do not provide such analysis capability. Table II shows the number of admitted G.711 VoIP flows for increasing the number of two-way background data connections.…”

Section: ) Voice Capacity Analysis In the Presence Of Background Tramentioning

confidence: 99%

“…Once again, note that the analytical models of [29]- [35] do not provide such analysis capability. Table III We have also designed a practical and simple multimedia capacity prediction and admission control algorithm to limit the number of admitted realtime multimedia flows in the 802.11e infrastructure BSS.…”

Section: ) Voice and Video Capacity Analysismentioning

confidence: 99%

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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“…To understand the potential for V2V to support such delay-sensitive traffic safety applications, analytical method for end-to-end delay is in demand. The end-to-end delay usually consists of three parts: the packet delayed by data processing, the packet delayed in the queue by scheduling policy, and the packet delayed by the medium accessing [14][15][16][17][18][19]. The third kind of delay is known as MAC access delay and is much longer than the other two kinds of delays.…”

Section: Introductionmentioning

confidence: 99%

“…is a discrete random variable and follows the probability distribution in (18), the definition of expectation in probability theory is applied to structure (19).…”

Section: The First Scenario Considermentioning

confidence: 99%

An Analytical Approach to Relay Access Delay in Multihop Relay Chain of VANETs

Zhang

2015

International Journal of Distributed Sensor Networks

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On the demand of many applications, vehicle to vehicle (V2V) communications have attracted many researchers' attentions. In the developments of traffic safety applications based on VANET, the dissemination delay is critical. The dissemination delay of safety messages in the form of text has been studied thoroughly. In contrast, the dissemination delays of video or audio safety messages are just emerging and there are still a lot of things to be done. Considering the poor communication environment of multimedia safety messages dissemination in V2V, the analysis of multimedia message dissemination delay has great significance in the traffic safety applications. By extending and integrating previous achievements of analyzing MAC access delay in video stream dissemination, we proposed a method for modeling the relay access delay of IEEE 802.11p in the multihop relay chain of VANETs. Simulation results showed that the cumulative distribution function, the expectation, and the standard deviation of the relay access delays can be calculated effectively. In addition, the impacts of the number of hops and the length of packets on the relay access delays have been properly evaluated. Our study would open these research issues for discussion, which will contribute to the design and implementation of traffic safety.

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System centric and user centric queueing models for IEEE 802.11 based wireless LANs

Cited by 30 publications

References 23 publications

Modified MAC for Priority Traffic with Slow Decrease of Contention Window and Reservation Based Packet Forwarding in IEEE 802.11 for QoS Provisioning

Modified MAC for Priority Traffic with Slow Decrease of Contention Window and Reservation Based Packet Forwarding in IEEE 802.11 for QoS Provisioning

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

An Analytical Approach to Relay Access Delay in Multihop Relay Chain of VANETs

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