A new load equation for 802.11 MAC performance evaluation under non-saturated conditions

Dong, Wenxiang; Zhang, Wenyi; Chen, Xiaohui; Wei, Guo

doi:10.1109/iccchina.2012.6356920

Cited by 6 publications

(3 citation statements)

References 20 publications

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“…Therefore, equation 23offers a more sophisticated method taking into account the existence of traffic arrival along with the buffer memory. Then, the new load equation of queue probability q is given by (23) [11], [28]:…”

Section: Load Equation Qmentioning

confidence: 99%

Saturation Throughput Analysis of Steganography in the IEEE 802.11p Protocol in the Presence of Non-Ideal Transmission Channel

Almohammedi

Shepelev

2021

IEEE Access

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Vehicular network is a communication technology designed to provide comfort and improve life safety and driving efficiency on the road. In vehicular network, trustworthy communication is very important as fake applications may lead to disastrous road accidents. Several information hiding methods are used to enable vehicles to communicate secretly or to covertly report a misbehaving vehicle. The work in this paper focuses on a performance analysis based on 2-D Markov chain model for the system throughput of steganographic scheme in relation to the IEEE 802.11p standard. This model studies wireless padding (WiPad) that is used to hide data into the padding of packets at the physical layer of wireless local area networks (WLANs). The analytical study is under non-saturated conditions with non-ideal transmission channel. The study also considers the rate of packet arrival with the first order of buffer memory, back-off timer freezing, back-off phases, and short retry limit to satisfy the IEEE 802.11p specifications. It emphasizes that taking these factors into account are significant in modelling the system throughput of the steganographic channel. These factors typically provide a precise channel access estimation, yield more accurate findings of system throughput, use the channel efficiently, prevent overestimation of saturation throughput, and ensure that no packet is served indefinitely. The model is validated by comparing the numerical and simulation results under different network parameters. Analytical and simulation results stated that the values of the system throughput of the steganographic channel based on data and control frames are low as the vehicles number n, traffic arrival rate λ, packet size, and the value of Bit Error Rate (BER) increase. INDEX TERMS Vehicular network, IEEE 802.11p, steganographic channel, non-ideal transmission channel, BER.

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Section: Load Equation Qmentioning

confidence: 99%

Saturation Throughput Analysis of Steganography in the IEEE 802.11p Protocol in the Presence of Non-Ideal Transmission Channel

Almohammedi

Shepelev

2021

IEEE Access

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“…We added an idle state to the models to represent the empty buffer when no packet is ready for transmission. The reason for choosing unsaturated traffic in our models is to simply control the traffic arrival rate on the network based on the situation; the real network conditions are mostly unsaturated, and saturated traffic sometimes makes the network unstable [6], [7]. Typically, VANETs support broadcast mode and acknowledgement (ACK) mechanism for safety and service applications, respectively.…”

Section: Figure 1 Vanet Architecturesmentioning

confidence: 99%

An Accurate Performance Analysis of Hybrid Efficient and Reliable MAC Protocol in VANET under Non-saturated Conditions

Almohammedi¹,

Noordin²,

Sali³

et al. 2017

IJECE

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Vehicular Ad Hoc Networks (VANETs) is a technology supporting two types of applications, safety and service applications with higher and lower priorities respectively. Thereby, Medium Access Control (MAC) protocol is designed to provide reliable and efficient data broadcasting based on prioritization. Different from the IEEE 1609.4 (legacy), HER-MAC protocol is a new multi-channel MAC proposed for VANETs, offering remarkable performance with regards to safety applications transmission. This paper focuses on the analysis of packet delivery ratio of the HER-MAC protocol under non-saturated conditions. 1-D and 2-D Markov chains have been developed for safety and non-safety applications respectively, to evaluate mathematically the performance of HER-MAC protocol. The presented work has taken into account the freezing of the backoff timer for both applications and the backoff stages along with short retry limit for non-safety applications in order to meet the IEEE 802.11p specifications. It highlights that taking these elements into consideration are important in modeling the system, to provide an accurate estimation of the channel access, and guarantees that no packet is served indefinitely. More precise results of the system packet delivery ratio have been yield. The probability of successful transmission and collisions were derived and used to compute the packet delivery ratio. The simulation results validate the analytical results of our models and indicate that the performance of our models outperformed the existing models in terms of the packet delivery ratio under different number of vehicles and contention window. Keyword:Backoff

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“…For this reason, we used 1D and 2D Markov models under unsaturated traffic to analyze safety and non-safety messages respectively. The reason for choosing unsaturated traffic in our model was to take into consideration the inter arrival time and burstiness in the network; real networks are often unsaturated and saturated traffic sometimes makes a network unstable [6,7].…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Performance Analysis of IEEE 802.11p based MAC for Vehicular Communications Under Non-saturated Conditions

et al. 2017

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Abstract. Reliable and efficient data broadcasting is essential in vehicular networks to provide safety-critical and commercial service messages on the road. There is still no comprehensive analysis of IEEE 802.11p based MAC that portrays the presence of buffer memory in vehicular networks. Besides, most of the analytical works do not fulfill some of the IEEE 802.11p specifications, such as short retry limit and back-off timer freezing. This paper proposes a 1-D and 2-D Markov model to analyze mathematically IEEE 802.11p based MAC for safety and non-safety messages respectively. The work presented in this paper takes into account the traffic arrival along with the first-order buffer memory and freezing of the back-off timer as well, to utilize the channel efficiently and provide higher accuracy in estimation of channel access, yielding more precise results of the system throughput for non-safety messages and lower delay for safety messages. Furthermore, back-off stages with a short retry limit were applied for non-safety messages in order to meet the IEEE 802.11p specifications, guaranteeing that no packet is served indefinitely, avoiding the overestimation of system throughput. A simulation was carried out to validate the analytical results of our model.

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A new load equation for 802.11 MAC performance evaluation under non-saturated conditions

Cited by 6 publications

References 20 publications

Saturation Throughput Analysis of Steganography in the IEEE 802.11p Protocol in the Presence of Non-Ideal Transmission Channel

Saturation Throughput Analysis of Steganography in the IEEE 802.11p Protocol in the Presence of Non-Ideal Transmission Channel

An Accurate Performance Analysis of Hybrid Efficient and Reliable MAC Protocol in VANET under Non-saturated Conditions

A Comprehensive Performance Analysis of IEEE 802.11p based MAC for Vehicular Communications Under Non-saturated Conditions

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