Tuning of 802.11e network parameters

Freitag, Juliana; Fonseca, Nelson L. S. da; Rezende, José Ferreira de

doi:10.1109/lcomm.2006.1665127

Cited by 42 publications

(31 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Inan et al [27] considered the problem of multimedia capacity estimation and admission control for the EDCA function and Engelstad and Østerbø proposed [15] a probabilistic model used for delay estimation. Several authors (see [10,54,19]) studied how the QoS parameters of EDCA will affect the performance and proposed how to control these parameters.…”

Section: Real-time Network Schedulingmentioning

confidence: 99%

Modular software architecture for flexible reservation mechanisms on heterogeneous resources

Sójka

Píša

Faggioli

et al. 2011

Journal of Systems Architecture

View full text Add to dashboard Cite

Management, allocation and scheduling of heterogeneous resources for complex distributed real-time applications is a challenging problem. Timing constraints of applications may be fulfilled by a proper use of real-time scheduling policies, admission control and enforcement of timing constraints. However, it is not easy to design basic infrastructure services that allow for an easy access to the allocation of multiple heterogeneous resources in a distributed environment.In this paper, we present a middleware for providing distributed soft real-time applications with a uniform API for reserving heterogeneous resources with real-time scheduling capabilities in a distributed environment. The architecture relies on standard POSIX OS facilities, such as time management and standard TCP/IP networking services, and it is designed around CORBA, in order to facilitate modularity, flexibility and portability of the applications using it. However, real-time scheduling is supported by proper extensions at the kernel-level, plugged within the framework by means of dedicated resource managers. Our current implementation on Linux supports reservation of CPU, disk and network bandwidth. However, additional resource managers supporting alternative real-time schedulers for these resources, as well as additional types of resources, may be easily added.We present experimental results gathered on both synthetic applications and a real multimedia video streaming case study, showing advantages deriving from the use of the proposed middleware. Finally, overhead figures are reported, showing sustainability of the approach for a wide class of complex, distributed, soft real-time applications.

show abstract

Section: Real-time Network Schedulingmentioning

confidence: 99%

Modular software architecture for flexible reservation mechanisms on heterogeneous resources

Sójka

Píša

Faggioli

et al. 2011

Journal of Systems Architecture

View full text Add to dashboard Cite

show abstract

“…Only recently has the challenge of configuring the EDCA parameters been addressed [7], [21]- [27]. However, the existing approaches suffer from major drawbacks.…”

Section: B Related Workmentioning

confidence: 99%

“…The works in [24] and [25] only consider two traffic types, i.e., voice and data, and do not allow different types of real-time and nonreal-time 4 traffic. The default configuration recommended by the standard [2], the one recommended in [26], and the adaptive mechanism in [27] consider all traffic types, but they are based on heuristics and, therefore, do not guarantee optimal performance. Indeed, the performance evaluation conducted shows that our proposal substantially outperforms these previous proposals.…”

Section: B Related Workmentioning

confidence: 99%

“…• two other available approaches for the configuration of the EDCA parameters, namely, the standard recommended set of values [2] and the recent proposal in [26]; • the adaptive configuration schemes in [27], [31], and [32], which aim to provide QoS guarantees in EDCA WLANs. It is worth noting that the approaches in [31] and [32] require introducing changes to the 802.11e standard, which challenges their practical use.…”

Section: Comparison Against Other Approachesmentioning

confidence: 99%

See 1 more Smart Citation

Optimal Configuration of 802.11e EDCA for Real-Time and Data Traffic

Serrano

Banchs

Patras

et al. 2010

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

Abstract-The enhanced distributed channel access (EDCA) mechanism of the IEEE 802.11e standard provides quality-ofservice (QoS) support through service differentiation by using different medium-access-control (MAC) parameters for different stations. The configuration of these parameters, however, is still an open research challenge, as the standard provides only a set of fixed recommended values that do not take into account the current wireless local area network (WLAN) conditions and, therefore, lead to suboptimal performance. In this paper, we propose a novel algorithm for EDCA that, given the throughput and delay requirements of the stations that are present in the WLAN, computes the optimal configuration of the EDCA parameters. We first present a throughput and delay analysis that provides the mathematical foundation upon which our algorithm is based. This analysis is validated through simulations of different traffic sources (both data and real time) and EDCA configurations. We then propose a mechanism to derive the optimal configuration of the EDCA parameters, given a set of performance criteria for throughput and delay. We assess the effectiveness of the configuration provided by our algorithm by comparing it against 1) the recommended values by the standard, 2) the results from an exhaustive search over the parameter space, and 3) previous configuration proposals, which are both standard and nonstandard compliant. Results show that our configuration outperforms all other approaches.Index Terms-Enhanced distributed channel access (EDCA), IEEE 802.11, performance analysis, quality-of-service (QoS), wireless local area network (WLAN).

show abstract

“…Centralized approaches [14,15], based on a single node that periodically distributes the set of MAC layer parameters to be used by every station. These approaches are compatible with the 802.11e standard.…”

Section: Introductionmentioning

confidence: 99%

A Control Theoretic Approach for Throughput Optimization in IEEE 802.11e EDCA WLANs

2008

View full text Add to dashboard Cite

The MAC layer of the 802.11 standard, based on the CSMA/CA mechanism, specifies a set of parameters to control the aggressiveness of stations when trying to access the channel. However, these parameters are statically set independently of the conditions of the WLAN (e.g. the number of contending stations), leading to poor performance for most scenarios. To overcome this limitation previous work proposes to adapt the value of one of those parameters, namely the CW, based on an estimation of the conditions of the WLAN. However, these approaches suffer from two major drawbacks: i) they require extending the capabilities of standard devices or ii) are based on heuristics. In this paper we propose a control theoretic approach to adapt the CW to the conditions of the WLAN, based on an analytical model of its operation, that is fully compliant with the 802.11e standard. We use a Proportional Integrator controller in order to drive the WLAN to its optimal point of operation and perform a theoretic analysis to determine its configuration. We show by means of an exhaustive performance evaluation that our algorithm maximizes the total throughput of the WLAN and substantially outperforms previous standard-compliant proposals.

show abstract

Tuning of 802.11e network parameters

Cited by 42 publications

References 10 publications

Modular software architecture for flexible reservation mechanisms on heterogeneous resources

Modular software architecture for flexible reservation mechanisms on heterogeneous resources

Optimal Configuration of 802.11e EDCA for Real-Time and Data Traffic

A Control Theoretic Approach for Throughput Optimization in IEEE 802.11e EDCA WLANs

Contact Info

Product

Resources

About