Performance Analysis of IEEE 802.11e Contention-Based Channel Access

Kong, Zhenning; Tsang, D.H.K.; Bensaou, Brahim; Gao, Deyun

doi:10.1109/jsac.2004.836019

Cited by 295 publications

(189 citation statements)

References 18 publications

Supporting

Mentioning

184

Contrasting

Unclassified

Order By: Relevance

“…Since QoS is supported in IEEE 802.11e, the high priority AC transmits with priority and needs to act as the high guarantee of successful transmission. However, QoS becomes low in the case of the number of nodes increasing [17], [18]. In this paper, we can solve these problems and enhance both of the throughput and the QoS.…”

Section: Problemsmentioning

confidence: 99%

Improving Throughput and QoS with IEEE 802.11e

Sanada¹,

Tian²,

Okuda³

et al. 2015

JACN

View full text Add to dashboard Cite

Abstract-WLANs have become increasingly popular and widely deployed. The MAC protocol is one of the important technology of the WLAN and affects communication efficiency directly. In this paper, focusing on MAC protocol, we propose a novel protocol that network nodes dynamically optimize their backoff process to achieve high throughput while supporting satisfied QoS. The total throughput decreases heavily and cannot guarantee QoS under a high traffic load, which needs to be improved. Through theoretical analysis, we find that the average idle interval can represent current network traffic load and can be used together with estimated number of nodes for setting optimal CW. Since necessary indexes can be obtained through direct measurement from channel, our scheme will not increase any added load to networks. Through simulation comparison with conventional method, we show that our scheme can greatly enhance the throughput and the QoS no matter the network is in saturated or non-saturated case, while maintaining good fairness.

show abstract

Section: Problemsmentioning

confidence: 99%

Improving Throughput and QoS with IEEE 802.11e

Sanada¹,

Tian²,

Okuda³

et al. 2015

JACN

View full text Add to dashboard Cite

show abstract

“…Most of the existing works extend the basic QoS mechanism in the IEEE 802.11e standard. In [10], the authors present the development of an analysis model, while also taking into account some new features of the EDCA, such as virtual collision, different arbitration inter frame spaces (AIFSs), and different CW sizes. The work in [11] investigates the impacts of back-off parameters, such as the minimum back-off window size, the back-off window-increasing factor, and the retransmission limit, on the performance of EDCA.…”

Section: Related Work In Vehicular Networkmentioning

confidence: 99%

An Enhanced Message Priority Mechanism in IEEE 802.11p Based Vehicular Networks

2015

J Inf Process Syst

View full text Add to dashboard Cite

IEEE 802.11p is a standard MAC protocol for wireless access in vehicular environments (WAVEs). If a packet collision happens when a safety message is sent out, IEEE 802.11p chooses a random back-off counter value in a fixed-size contention window. However, depending on the random choice of back-off counter value, it is still possible that less important messages are sent out first while more important messages are delayed longer until sent out. In this paper, we present a new scheme for safety message scheduling, called the enhanced message priority mechanism (EMPM). It consists of the following two components: the benefit-value algorithm, which calculates the priority of the messages depending on the speed, deceleration, and message lifetime; and the back-off counter selection algorithm, which chooses the non-uniform back-off counter value in order to reduce the collision probability and to enhance the throughput of the highly beneficial messages. Numerical results show that the EMPM can significantly improve the throughput and delay of messages with high benefits when compared with existing MAC protocols. Consequently, the EMPM can provide better QoS support for the more important and urgent messages.

show abstract

“…Because the AP does not know the prior knowledge of the senders' identities and CSI, the blind detection scheme which is described in [19] is needed to separate the RTS packets and is applied to estimate the CSI simultaneously. 802.11 systems exploit the structure of RTS/CTS packets to estimate the CSI [20]. RTS packets are typically transmitted at a lower data rate than the data packets in IEEE 802.11 so that blind detection schemes are suitable for detecting RTS packets.…”

Section: Protocol Operation Of Mac Layermentioning

confidence: 99%

Cross-Layer Resource Allocation Scheme for WLANs with Multipacket Reception

Xu¹,

Xu²,

Zhang³

et al. 2011

ETRI J

View full text Add to dashboard Cite

. Our cross-layer resource allocation scheme consists of three stages. Firstly, the condition of sharing the subchannel by more than one user is studied. Secondly, the subchannel allocation policy which depends on the data packets' lengths and the admissible combination of users per subchannel is proposed. Finally, the bits and corresponding power are allocated to users based on a greedy algorithm and the data packets' lengths. The analysis and simulation results demonstrate that our proposed scheme not only achieves significant improvement in system throughput and average packet delay compared with conventional schemes but also has low computational complexity.Keywords: Wireless local area networks (WLANs), multiple-input multiple-output orthogonal frequencydivision multiplexing (MIMO-OFDM), beamforming, distributed co-ordination function (DCF), cross-layer resource allocation, multipacket reception (MPR) .

show abstract

Performance Analysis of IEEE 802.11e Contention-Based Channel Access

Cited by 295 publications

References 18 publications

Improving Throughput and QoS with IEEE 802.11e

Improving Throughput and QoS with IEEE 802.11e

An Enhanced Message Priority Mechanism in IEEE 802.11p Based Vehicular Networks

Cross-Layer Resource Allocation Scheme for WLANs with Multipacket Reception

Contact Info

Product

Resources

About