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CSMA/CA

CSMA/CA in Time and Frequency Domains

CSMA/CA in Time and Frequency Domains

... To quantify these two goals, we define the interference as the fraction of the total spectrum that is used by more than one station at any given time. Similarly, we define the spectrum usage as the fraction of total ...

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Carrier Sense Multiple Access & Collision Avoidance– Visualisation Teaching Tool (CSMA/CA-VTT)

Carrier Sense Multiple Access & Collision Avoidance– Visualisation Teaching Tool (CSMA/CA-VTT)

... CSMA/CA and CSMA/CD are one of very crucial topics and technologies in the telecommunication and academic ...of CSMA/CA, utilizing the phenomenon of “listen before you ...

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Investigation on Delay and Power Minimization in IEEE 802 15 4 Protocol using CSMA CA Algorithm

Investigation on Delay and Power Minimization in IEEE 802 15 4 Protocol using CSMA CA Algorithm

... Soumen moulik, Sudip Misra and Chandan Chakraborty (2018) estimate the superframe structure of the Medium Access management (MAC) sublayer in IEEE 802.15.4 protocol (ZigBee), measured for Low-Rate Wireless Personal Area ...

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Enhanced CSMA/CA Contention Window for Efficient Random Access in IEEE 802  15  6

Enhanced CSMA/CA Contention Window for Efficient Random Access in IEEE 802 15 6

... WBAN provide promising applications in medical monitoring systems to measure specified physiological data and also provide location-based information .In this paper, we presented an enhanced version of ...

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Investigation of Power aware and rate control in CSMA/CA based Mobile Ad-Hoc Communication
                 

Investigation of Power aware and rate control in CSMA/CA based Mobile Ad-Hoc Communication  

... that CSMA/CA based technique are more flexible for wireless mobile ad-hoc communication that gives congestion information to all senders’ nodes and if anywhere congestion found in the network then minimize ...

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Investigation of Power aware and rate control in CSMA/CA based Mobile Ad-Hoc Communication
                 

Investigation of Power aware and rate control in CSMA/CA based Mobile Ad-Hoc Communication  

... that CSMA/CA MAC technique are better and feasible for recent trends of wireless mobile ad- hoc ...uses CSMA/CA mechanism and resolve the problem of congestion, contention as well as rate ...

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Performance characterization of CSMA/CA adapted multi user MIMO aware MAC in WLANs

Performance characterization of CSMA/CA adapted multi user MIMO aware MAC in WLANs

... These results again depict the overhead ’ s effect and effects related to basic CSMA/CA operation and its requirements as mentioned above. In addition, it can be observed that throughput increases in the ...

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Congestion Minimization through Collision Detection in TDMA and CSMA/CA Scheme in Wireless Mobile Ad Hoc Network

Congestion Minimization through Collision Detection in TDMA and CSMA/CA Scheme in Wireless Mobile Ad Hoc Network

... with CSMA/CA technique here shows tcp0 and tcp1 transmission flows maximum data till the end but tcp0 flow is very low, according to given result we conclude our CSMA/CA mechanism gives best ...

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MIMO Network Coding Based PHY/MAC Protocol for Replacement of CSMA/CA in Efficient Two Way Multihop Relay Networks

MIMO Network Coding Based PHY/MAC Protocol for Replacement of CSMA/CA in Efficient Two Way Multihop Relay Networks

... of CSMA/CA based MAC protocols in mesh networks, however, leads to an inefficient resource utilization, and to high ...to CSMA/CA mesh ...

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ATRAS: adaptive MAC protocol for efficient and fair coexistence between radio over fiber based and CSMA/CA based WLANs

ATRAS: adaptive MAC protocol for efficient and fair coexistence between radio over fiber based and CSMA/CA based WLANs

... However, extending the slot time increases the overhead duration in CSMA/CA, which leads to unfairness between an RoF-based WLAN and a legacy WLAN. For example, when the propagation delay is 50 μ s, the ...

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An efficient backoff algorithm for IEEE 802 15 4 with MAC techniques in slotted CSMA/CA networks

An efficient backoff algorithm for IEEE 802 15 4 with MAC techniques in slotted CSMA/CA networks

... The Adaptive Backoff Exponent (ABE) Algorithm was proposed in [44] to update and manage inefficient backoff sort (BE) of IEEE 802.15.4 MAC. BE chooses backoff time or amount of backoff periods contraption ought to hold ...

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CSMA/CCA: A Modified CSMA/CA Protocol Mitigating the Fairness Problem for IEEE 802 11 DCF

CSMA/CCA: A Modified CSMA/CA Protocol Mitigating the Fairness Problem for IEEE 802 11 DCF

... the CSMA/CA protocol in use, the DCF provides both a DATA-ACK two-way handshaking basic access mech- anism and an RTS-CTS-DATA-ACK four-way handshak- ing access mechanism (called RTS/CTS access mechanism ...

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Modeling performance of CSMA/CA with retransmissions in wireless personal area networks

Modeling performance of CSMA/CA with retransmissions in wireless personal area networks

... IEEE 802.15.4 standard has been adopted for WSNs with a little modification. When considering beacon-enable mode, the network uses a slotted car- rier sense multiple access (CSMA) mechanism with collision ...

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Analysis of Slotted CSMA/CA of IEEE 802 15 4

Analysis of Slotted CSMA/CA of IEEE 802 15 4

... During the CAP, to achieve all the hub fight through reducing CSMA / CA system. This calculation is essentially dependent on three parameters such as backoff (nb), backoffience exponent (BE) and the number ...

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Improved Optimal Slotted CSMA/CA Protocol

Improved Optimal Slotted CSMA/CA Protocol

... (WLANs). CSMA/CA sense and avoid collisions, thus improving ...of CSMA/CA protocol reduces collisions and improves the overall ...slotted CSMA/CA in wireless networks, a modified ...

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Impact of Transient CSMA/CA Access Delays on Active
Bandwidth Measurements

Impact of Transient CSMA/CA Access Delays on Active Bandwidth Measurements

... Recent literature related to bandwidth measurement in wireless networks [3, 5, 25] has reported that existing tools that aim at measuring the available bandwidth are not accu- rate. Many of these measuring tools have ...

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How CSMA/CA With Deferral Affects Performance and Dynamics in Power-Line Communications

How CSMA/CA With Deferral Affects Performance and Dynamics in Power-Line Communications

... The 1901 CSMA/CA procedure includes two counters: the backoff counter ( BC ) and the deferral counter ( DC ). Upon the arrival of a new packet, a transmitting station enters backoff stage 0. It then draws ...

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Throughput-Optimal Queue Length Based CSMA/CA Algorithm for Cognitive Radio Networks

Throughput-Optimal Queue Length Based CSMA/CA Algorithm for Cognitive Radio Networks

... develop CA-CSMA: a throughput optimal distributed cqueue length based CSMA/CA scheduling algorithm for cognitive radio ...based CSMA/CA ...

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Efficient Distance based Q CSMA/CA Algorithms Wireless Multi Hop Networks

Efficient Distance based Q CSMA/CA Algorithms Wireless Multi Hop Networks

... The parameters used to analyze the performance are the throughput and delay. The throughput of the scheduling algorithm will be determined by the mass of the arrival rate so that the scheduling algorithm makes the queue ...

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Control Access Point of Devices for Delay Reduction in WBAN Systems with CSMA/CA

Control Access Point of Devices for Delay Reduction in WBAN Systems with CSMA/CA

... As shown in Figure 3, a device starts decrementing its back off counter by one for each idle CSMA slot. When the back off counter reaches zero, the device transmits its packet. Once the channel is busy because of ...

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