IEEE 802.11 DCF
CSMA/CCA: A Modified CSMA/CA Protocol Mitigating the Fairness Problem for IEEE 802 11 DCF
... The values of the system parameters for the IEEE 802.11 DCF simulator are summarized in Table 2. As in [8], these parameter values closely follow those specified for the fre- quency hopping spread spectrum ...
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Performance enhancement of IEEE 802 11 DCF using novel backoff algorithm
... Figure 10b represents the standard deviation of Figure 10a, and Figure 10d represents the standard devi- ation of Figure 10c. As we can see from Figure 10b,d, the sampling changes in the proposed algorithm is larger than ...
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IEEE 802 11 Wireless LANs: Performance Analysis and Protocol Refinement
... 10, 11] have attempted to improve IEEE ...the IEEE 802.11 protocol. Aad and Castelluccia in [11] suggests three different ways to enhance ...of IEEE 802.11 DCF by simply modifying ...
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Adaptive Distributed Inter Frame Space for IEEE 802 11 MAC Protocol
... In this paper, the following points are considered for providing service differentiation in the basic IEEE 802.11 DCF scheme: 1 MAC protocol parameters such as DIFS is dynamically adjust[r] ...
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Analysis for Saturation Throughput Using Various Mechanisms for IEEE 802 11 WLAN'S
... DCF is based on the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) technique and adopts a slotted Binary Exponential Back-off (BEB) scheme to reduce collisions due to stations transmitting ...
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Dynamic Adaption of DCF and PCF Mode of IEEE 802 11 WLAN
... © 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 2727 In contrast to the ad hoc network, infrastructure networks are established to provide wireless users with specific services and ...
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An IEEE 802 11 EDCA Model with Support for Analysing Networks with Misbehaving Nodes
... EDCA introduces four Access Categories (ACs) to pro- vide QoS through traffic differentiation. These categories are, from the highest priority: Voice (Vo), Video (Vi), Best effort (BE), and Background (BK). The medium ...
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Security Approaches in IEEE 802 11 MANET—Performance Evaluation of USM and RAS
... Packet Delivery Ratio (PDR) with Signal Strength (SS) [2]. When a node detects jamming attack, it uses the pro- posed rate adaptation scheme for data transmission. However the solution relays on the high rate of signal ...
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Rate adaptation in IEEE 802 11 WLAN based on neural network
... Most IEEE 802.11 WLAN devices use the DCF for shared wireless channel ...the DCF, when multiple frames are transmitted simultaneously by different stations, a collision occurs, which destroys most of ...
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Optimal delay analysis for real time traffics over IEEE 802 11 wireless LANs
... 1000 byte. We compare the performance of our scheme, called “optimal” in the figures, with a non- optimal scheme that has a fixed number of retrans- missions. Also, for a fair comparison, our proposed model is compared ...
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Dynamic tuning of the IEEE 802 11 distributed coordination function to derive a theoretical throughput limit
... (the minimum CW). Subsequently, the CW value is doubled when packet transmission fails. For a node to obtain a Backoff value, it must first determine whether the channel is in use. If the channel is not busy, then the ...
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Throughput analysis for coexisting IEEE 802 15 4 and 802 11 networks under unsaturated traffic
... The IEEE 802.15.4-based wireless personal area network (WPAN) has been widely employed in many applica- tions, thanks to its low-cost and low-power characteris- tics. IEEE 802.11b/g wireless local area ...
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Reducing the MAC Latency for IEEE 802 11 Vehicular Internet Access
... First, the time that an MS stays on a channel is determined by the MinChannelTime and MaxChannelTime. In the active scanning mode, after a probe message is sent, the MS will wait for MinChannelTime and if no response is ...
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Chap5 IEEE 802 pdf
... 4 jn1-at1-0-0-19.wor.vbns.net (204.147.132.129) 16 ms 11 ms 13 ms 5 jn1-so7-0-0-0.wae.vbns.net (204.147.136.136) 21 ms 18 ms 18 ms 6 abilene-vbns.abilene.ucaid.edu (198.32.11.9) 22 ms 18 ms 22 ms 7 ...
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A Performance Evaluation for Rate Adaptation Algorithms in IEEE 802 11 Wireless Networks
... Open-Loop based Approaches: (i) AARF; (ii) Minstrel, and (iii) Onoe, and from Closed-Loop (iv) Cara, (v) RRAA and (vi) Ideal (it is Closed-Loop approach and similar to RBAR). Algorithms chosen based in compatibility with ...
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Chap5 IEEE 802 pdf
... Example 19.5 Figure 19.3 shows a block of addresses, in both binary and dotted-decimal notation, granted to a small business that needs 16 addresses.. We can see that the restrictions ar[r] ...
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Chap5 IEEE 802 pdf
... server leaves connection open after sending response subsequent HTTP messages between same client/server sent over open connection client sends requests as soon as it encounters a refere[r] ...
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Improving the IEEE 802 11 power saving mechanism in the presence of hidden terminals
... Due to its low cost and popularity, the IEEE 802.11 WLAN (wireless local area network) is considered as one of the most promising wireless technologies for IoT (Internet of Things). 802.11 WLAN also provides a PSM ...
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Chap5 IEEE 802 pdf
... HC may allocate TXOPs to itself to initiate MSDU ay a o a O o o a U deliveries whenever required, after detecting the medium idle for PIFS duration and without backoff. To give HC higher priority over legacy DCF ...
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Channel Resource Allocation for VoIP Applications in Collaborative IEEE 802 11/802 16 Networks
... In the literature, only a few spectrum sharing methods have been proposed for these two types of networks sharing the unlicensed bands (see [14–16], e.g.). In [14], Berlemann et al. proposed to partially block 802.11 ...
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