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Автор: Grafiati

Опубліковано: 14 березня 2023

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1

Mohi Uddin, Khandaker Mohammad, Nayeema Islam, Nur-A. Alam, and Jahanara Akhtar. "Performance Comparison of IEEE802.11a, IEEE802.11b, IEEE802.11g and IEEE802.11n in Multiple Routers." Asian Journal of Applied Science and Technology 04, no. 04 (2020): 65–72. http://dx.doi.org/10.38177/ajast.2020.4406.

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2

Ali Mohammed, Almutaz, and Ibrahim Elimam Abdalla. "Performance Analysis of FTP, HTTP and Database for IEEE802.11, IEEE802.11a, IEEE802.11b and IEEE802.11g using OPNET Simulator." International Journal of Computer Trends and Technology 38, no. 2 (August 25, 2016): 57–62. http://dx.doi.org/10.14445/22312803/ijctt-v38p111.

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3

Ammar, F., and Hanafi Hanafi. "ANALISIS TRANSFER RATE WIRELESS LOCAL AREA NETWORK DENGAN STANDAR IEEE 802.11A DAN IEEE 802.11G PADA KANAL LINE OF SIGHT." Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) 3, no. 1 (April 26, 2016): 31–39. http://dx.doi.org/10.33019/ecotipe.v3i1.28.

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WiFi bekerja pada band 2,4 GHz dan 5 GHz. Standar WiFi yang bekerja pada frekuensi ini antara lain IEEE802.11g dan IEEE802.11a. Pada penelitian ini dilakukan pengukuran terhadap transfer rate download dan upload data dengan standar IEEE802.11g dan IEEE802.11a. Pengukuran dilakukan pada kanal Line of Sight (LOS), menggunakan dua buah laptop yang dihubungkan dengan Access Point (AP) standar IEEE802.11g dan IEEE802.11a. Hasil penelitian diperoleh, pada standar IEEE802.11g, transfer rate download dan upload data tertinggi 2.662,54.KB/s dan 2.549,60 KB/s, dan terendah 484,50.KB/s dan 477,40 KB/s, sedangkan pada standar IEEE802.11a, transfer rate download dan upload data tertinggi 8.104,68 KB/s dan 5.744,24 KB/s, dan terendah 872,24 KB/s dan 465,38.KB/s. Pada standar IEEE802.11g, transfer rate download dan upload data pada sinyal terendah hingga di bawah 35% dan 30%, dari transfer rate download dan upload data tertinggi. Pada standar IEEE802.11a, transfer rate download dan upload data pada kualitas sinyal terendah hingga di bawah 20% dan 30%, dari transfer rate download dan upload data tertinggi. Kemampuan transfer rate download data Standar IEEE802.11a, 2–3 kali lebih baik pada kondisi kualitas sinyal tertinggi, dan tidak lebih dari 2 kali pada kondisi kualitas sinyal terendah, dibandingkan kemampuan transfer rate download data standar IEEE802.11g. Kemampuan transfer rate upload data Standar IEEE802.11a, 1,4–3 kali lebih baik pada kondisi kualitas sinyal tertinggi, dan 1-3 kali lebih baik pada kondisi kualitas sinyal terendah, dibandingkan kemampuan transfer rate upload data standar IEEE802.11g.

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4

Alwer, Abdulkader O., Jawad Rasheed, Adnan M. Abu-Mahfouz, and Parvaneh Shams. "Study and Evaluation of Quality of Services in Mobile Internet Protocol v6 Using IEEE802.11e." Wireless Communications and Mobile Computing 2022 (November 17, 2022): 1–11. http://dx.doi.org/10.1155/2022/3092512.

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Mobile Internet Protocol v6 (MIPv6) is a protocol that allows a mobile node (MN) to transparently maintain connections while moving from one subnet to another. Using the route optimization (RO) method in MIPv6 gives optimized routing and helps avoid triangular routing. In real-time applications such as video conference applications, quality of service (QoS) issues will increase especially in the handover process between subnets. This study investigates the performance of MIPv6 handover in IEEE802.11e standard in wireless environments. The investigation considers that handover for the MN moves between 2 home agents (HA). The system model’s fundamental performance limits are measured by packet delay variation, HA binding delay, and wireless local area network (WLAN) media access delay analysis metrics in video conference applications. According to the results of real-time simulations, network performance during the handover process can be effectively improved as the packet lost during handover decreased significantly from 43% in IEEE802.11b distributed coordination function (DCF) to 36% in IEEE802.11e hybrid coordination function (HCF). Furthermore, experimental results prove that IEEE802.11e connects to new HA roughly 20% quicker than IEEE802.11b, and IEEE802.11b has 100 times more time delay than IEEE802.11e. In addition to this, the WLAN media access delay of IEEE802.11b often reaches 0.00011 s as compared to 0.000005 s of IEEE802.11e. Thus, it is evident that the performance of IEEE802.11e in terms of packet delay variation, HA binding delay, and WLAN media access delay is better than IEEE802.11b. Likewise, it is noted that network speed during the handover process in IEEE802.11e can be considerably improved in a MIPv6 scenario.

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5

Fapohunda, Kofoworola, Eberechukwu Numan Paulson, Zubair Suleiman, Oladimeji Saliu, David Michael, and Kamaludin Mohammed Yusof. "Application of Bat Algorithm for The Detection of Hidden Nodes in IEEE802.11ah Networks." ELEKTRIKA- Journal of Electrical Engineering 18, no. 1 (April 24, 2019): 11–15. http://dx.doi.org/10.11113/elektrika.v18n1.129.

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Hidden node problem sometimes referred to as frequent packets collision that mostly leads to loss of packets is no longer new in wireless networks because it affects the previous IEEE802.11 standards. The new IEEE802.11ah standard which is also a sub-standard of IEEE 802.11 is no exemption. As a matter of fact, IEEE802.11ah suffers from a hidden node problem more than networks (IEEE 802.11a/b/n/ac) due to their wider coverage which is up to 1km, high number of devices they can support (over 8000 nodes to one AP) and frequent simultaneous sleeping and sending of the nodes (power saving mode). A few researchers have worked on this hidden node problem in IEEE802.11ah but could not get a lasting solution to it. Therefore, this paper proposes an algorithm which detects hidden nodes and also proposes a theoretical solution based on previous works which was also experimentally verified through the BIHD-CM.

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6

Sharif, Atif, Vidyasagar M. Potdar, and A. J. D. Rathnayaka. "Dependency of Transport Functions on IEEE802.11 and IEEE802.15.4 MAC/PHY Layer Protocols for WSN." International Journal of Business Data Communications and Networking 6, no. 3 (July 2010): 1–30. http://dx.doi.org/10.4018/jbdcn.2010070101.

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In WSN transport, layer protocol plays a significant role in maintaining the node’s energy budget. To find out the dependency of Transport layer on MAC/PHY layer, the authors have extensively tested various transport protocols using IEEE 802.11, IEEE 802.15.4 MAC/PHY protocols for WSN. For IEEE802.11 and IEEE802.15.4 with RTS/CTS ON the TCP variants has shown >80% packet delivery ratio and 5-20% packet loss, while for UDP it is around >63% and 19.54-35.18% respectively. On average 1-3% additional energy is consumed for packet retransmissions in IEEE 802.11 with RTS/CTS OFF whereas significant energy efficiency is observed in IEEE802.15.4 case. For IEEE 802.11 with RTS/CTS ON high throughput, low packet drop rate and increased E-2-E delay is observed, while for IEEE 802.15.4 improved power efficiency and jitter behavior is observed. This has led the foundation for the future development of the cross-layered energy efficient transport protocol for WSN.

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7

Fertig, Katharine, Odilson Tadeu Valle, Eraldo Silveira e Silva, and Tiago Semprebom. "Redes sem fio no monitoramento de falhas de máquinas: uma comparação de tecnologias sem fio com baixa densidade de nodos." Revista Brasileira de Computação Aplicada 14, no. 3 (November 21, 2022): 115–26. http://dx.doi.org/10.5335/rbca.v14i3.13128.

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A utilização de redes sem fio em ambientes industriais vem se tornando cada vez mais uma realidade. As principais motivações são o baixo custo de implantação e manutenção, em contraposição às redes cabeadas. Dentro da miríade de aplicações na indústria, o monitoramento de máquinas é particularmente importante pois permite predizer ou detectar a ocorrência de falhas, mitigando custos devido a uma sequência de eventos disruptivos. Principalmente em sistemas legados, os sensores sem fio podem requerer baterias que possibilitem uma longa sobrevivência da rede. O padrão IEEE802.11 por sua popularidade, vem sendo usado no monitoramento de máquinas, apesar do alto consumo de energia. Uma das alternativas é a tecnologia unslotted IEEE802.15.4 e a variante determinista DSME, que, apesar de baixas taxas de transmissão, possuem um perfil de consumo de energia muito baixo. Este trabalho visa avaliar um cenário em topologia estrela, com um salto e com baixa densidade de sensores, comparando estas tecnologias em termos de taxa de pacotes recebidos e energia residual. A avaliação é por simulação e confirma o alto consumo IEEE802.11, porém mostra que as vantagens do DSME, não são tão evidentes, podendo ser melhorado se explorado nas suas características de multifrequência.

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8

Zhang, Jian Ping, and Xiao Ling Zeng. "Research and Solution on Bottleneck Problem in Zigbee." Advanced Materials Research 989-994 (July 2014): 4115–18. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.4115.

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When the root is collecting data at a tree-based network, more upper nodes is usually with more packets usually. We called this bottleneck problem. The goal of this paper is to solve the bottleneck problem in ZigBee tree network. We use The Beacon-Only Period Approach which has been proposed by IEEE802.15.4b to avoid the collision caused by beacon frame. Moreover, we propose a centralized algorithm (TDMLF) that enables the nodes to fully use the GTS transmission. TDMLF not only avoides the hidden node problem which occurs in IEEE802.15.4, but also enables the entire network to achieve a more effective parallel transmission. Simulation results show that the TDMLF algorithm effectively reduces the bottleneck problem, and thus achieves a high delivery ratio. Moreover, because of no collision, the TDMLF also reduces the waste of time and energy by retransmission.

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9

Zheng, Zhe, Wenpeng Cui, Lei Qiao, and Jinghong Guo. "Performance and Power Consumption Analysis of IEEE802.11ah for Smart Grid." Wireless Communications and Mobile Computing 2018 (July 25, 2018): 1–8. http://dx.doi.org/10.1155/2018/5286560.

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IEEE802.11ah is a Wireless Local Area Network (WLAN) designed for the application of Internet of Things (IoT) and Machine to Machine (M2M), mainly used in sensor network, smart metering, car network, health care, and other emerging fields. IEEE802.11ah inherits the IEEE802.11n∖ac technology. At present, smart grid has completed the installation of optical fiber communication as its backbone network; WLAN can be used to build new wireless sensor network for smart grid by improving the transmission distance, speed, and power efficiency. The critical features of 802.11ah make it a powerful candidate for WLAN in smart grid, such as intelligent substation sensor network and automatic metering system (AMS). This paper simulates the new added highly robust 1MHz bandwidth and Modulation Coding Scheme (MCS) 10 in the 802.11ah physical layer and analyzes the coverage range and energy-saving performance of 802.11ah based on the simulation results. The analysis shows that the 802.11ah at 1 MHZ MCS 10 mode can obtain 2.5-3 dB gain. Combined with advantages of Sub-1GHz working frequency, 802.11ah could enlarge the coverage range by five times, compared to 2.4 GHz Wi-Fi. On the other side, 802.11ah module used in the smart grid can greatly reduce power consumption, especially in the AMS with a 1.1 kW.H power savings per year. 802.11ah not only provides the flexibility and low cost features of wireless communication, but also brings coverage and energy-saving performance improvements, which leads to good economic benefit.

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10

Adachi, Tomoko. "IEEE802.11n." Journal of The Institute of Image Information and Television Engineers 65, no. 7 (2011): 950–53. http://dx.doi.org/10.3169/itej.65.950.

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11

Si, Hai Fei, and Zhong Yang. "Wireless Sensor Network Programming Based on IEEE802.15.4." Advanced Materials Research 433-440 (January 2012): 3614–22. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.3614.

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Wireless sensor network (WSN) requires a wireless communication technology which is low in cost, low in power and easy to be implemented. IEEE802.15.4 standard is the standard specially designed for low-rate wireless personal area network (LR-WPAN) and aimed at introducing an unified standard for the low-rate interconnection between different devices used by a person or in a home, focusing on low power consumption, low-rate transmission and low cost. Since LR-WPAN which is defined on the basis of standard IEEE802.15.4 is of great similarity with WSN, it could be used as communication platform for wireless sensor. This paper, based on the analysis of LR-WPAN, puts forward the WSN networking scheme based on IEEE802.15.4.

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12

Ferrari, P., A. Flammini, D. Marioli, and A. Taroni. "IEEE802.11 Sensor Networking." IEEE Transactions on Instrumentation and Measurement 55, no. 2 (April 2006): 615–19. http://dx.doi.org/10.1109/tim.2006.870105.

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13

Hua, Qiao Guan, Mao Jian Lin, Guo Ning, Chen Bo, Dai Ning, and Zhang Chuan Long. "An Improved Backoff Scheme for the IEEE 802.15.4 MAC Protocol." Applied Mechanics and Materials 427-429 (September 2013): 2622–25. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.2622.

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To solve the impact on network performance by the mobile nodes and data transfer rate constantly changing,this paper proposes a improved backoff scheme for IEEE802.15.4, which uses Probability Judgement based on Network Load and Exponentially Weighted Moving Average (PJNL_EWMA). According to a real-time monitoring of current network status by probability judgement of network load , this method dynamically adjust backoff exponent by EWMA when the CSMA/CA begins. Compared the IEEE802.15.4 and MBS+EWMA schemes, the simulation experiments on NS2 platform show that the PJNL_EWMA scheme not only improves the throughput of the network, but also reduces the packet loss rate and the collision ratio,significantly improve the network performance.

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14

Wang, Ping, Yang Yang Zhang, Yang Hong, and Lei Dong. "The Implementation Based on the Improved IEEE802.15.4e Network of the Elder Monitoring System." Applied Mechanics and Materials 457-458 (October 2013): 751–54. http://dx.doi.org/10.4028/www.scientific.net/amm.457-458.751.

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In the elder Monitoring System, the improved IEEE802.15.4e network is in use. In order to deduce the energy consumption, modifition is introduced to the CSL mechanism of the protocol of IEEE802.15.4e. In the CSL mechanism, short interval, which is less than the channel sampling, is applied among the arouse frame sequence to wait for the acknowledged frame. Besides, a immediate response to turn on the receiver to wait for the data frame and quick switch back to the state of the next cyclical dormancy. In this way, the energy consumption problem is better solved, which greatly expand the life of the tumble detected terminal, compared with the same device worked by means of the other wireless network. Key words: IEEE802.15.4e; CSL mechanism; low consumption

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15

Stanislowski, David, Xavier Vilajosana, Qin Wang, Thomas Watteyne, and Kristofer S. J. Pister. "Adaptive Synchronization in IEEE802.15.4e Networks." IEEE Transactions on Industrial Informatics 10, no. 1 (February 2014): 795–802. http://dx.doi.org/10.1109/tii.2013.2255062.

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16

Morell, A., X. Vilajosana, J. L. Vicario, and T. Watteyne. "Label switching over IEEE802.15.4e networks." Transactions on Emerging Telecommunications Technologies 24, no. 5 (May 3, 2013): 458–75. http://dx.doi.org/10.1002/ett.2650.

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17

Muñoz, Jonathan, Tengfei Chang, Xavier Vilajosana, and Thomas Watteyne. "Evaluation of IEEE802.15.4g for Environmental Observations." Sensors 18, no. 10 (October 15, 2018): 3468. http://dx.doi.org/10.3390/s18103468.

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IEEE802.15.4g is a low-power wireless standard initially designed for Smart Utility Networks, i.e., for connecting smart meters. IEEE802.15.4g operates at sub-GHz frequencies to offer 2–3× longer communication range compared to its 2.4 GHz counterpart. Although the standard offers 3 PHYs (Frequncy Shift Keying, Orthogonal Frequency Division Multiplexing and Offset-Quadrature Phase Shift Keying) with numerous configurations, 2-FSK at 50 kbps is the mandatory and most prevalent radio setting used. This article looks at whether IEEE802.15.4g can be used to provide connectivity for outdoor deployments. We conduct range measurements using the totality of the standard (all modulations with all further parametrization) in the 863–870 MHz band, within four scenarios which we believe cover most low-power wireless outdoor applications: line of sight, smart agriculture, urban canyon, and smart metering. We show that there are radio settings that outperform the “2-FSK at 50 kbps” base setting in terms of range, throughput and reliability. Results show that highly reliable communications with data rates up to 800 kbps can be achieved in urban environments at 540 m between nodes, and the longest useful radio link is obtained at 779 m. We discuss how IEEE802.15.4g can be used for outdoor operation, and reduce the number of repeater nodes that need to be placed compared to a 2.4 GHz solution.

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18

Yoon, Sanghun, Seongkeun Jin, Daegyo Shin, and Kitaeg Lim. "Diversity modem for IEEE802.11p WAVE." Journal of IKEEE 18, no. 4 (December 31, 2014): 495–501. http://dx.doi.org/10.7471/ikeee.2014.18.4.495.

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19

Correa-Chica, Juan Camilo, Juan Felipe Botero-Vega, and Natalia Gaviria-Gómez. "Energy consumption and quality of service in WBAN: A performance evaluation between cross-layer and IEEE802.15.4." DYNA 84, no. 202 (July 1, 2017): 120–28. http://dx.doi.org/10.15446/dyna.v84n202.61895.

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Dentro de los esquemas de comunicación de redes inalámbricas de área corporal (WBAN), se encuentran los protocolos de capa cruzada, constituidos en una novedosa opción para alcanzar un balance efectivo entre consumo eficiente de energía y métricas de desempeño. En el presente trabajo, evaluamos el desempeño de una estrategia de capa cruzada al compararla contra los protocolos del estándar IEEE802.15.4 en una WBAN. Se evaluó el desempeño de ambas estrategias empleando una simulación de redes WBAN. Luego se ejecutó una comparación estadística y se encontró que la estrategia de capa cruzada ofrece un mejor desempeño con respecto a la compensación entre consumo eficiente de energía y algunas métricas de desempeño en nuestra WBAN. Observamos que en general, la estrategia de capa cruzada supera a ambos modos del estándar IEEE802.15.4 (ranurado y no-ranurado) con respecto a consumo eficiente de energía, retraso extremo a extremo, tasa de pérdida de paquetes y goodput.

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20

S. Alharthi, Ameera, Abdellatif I. Moustafa, and Ahmed A. Morgan. "Bandwidth-Oriented Allocation of GTS Slots for IEEE802.15.4." Journal of Computer Science & Computational Mathematics 11, no. 3 (September 30, 2021): 57–62. http://dx.doi.org/10.20967/jcscm.2021.03.005.

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21

Mao, Yong Ming, Dong Wei Zhang, and Feng Long Kan. "Simulation Research on MAC Layer Protocol Base on OPNET Modeler." Advanced Materials Research 945-949 (June 2014): 2349–52. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.2349.

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Modeling and simulation of MAC layer protocols for wireless sensor networks was realized, including WOO-MAC, IEEE802.11 and S-MAC base on OPNET Modeler. On three aspects performance of the average end-to-end information delay, the end-to-end throughput and the average energy consumption, the simulation results were analyzed and research. And the results base on WOO-MAC protocol showed better performance than IEEE802.11 and S-MAC.

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22

Xu, Xin Yue, Xue Mei Ye, Yun Jie Zhu, Yu Jia Dai, Xue Song Li, and Zheng Zheng Gong. "Research on Wireless Network Traffic Modeling Based on Channel State." Applied Mechanics and Materials 599-601 (August 2014): 1679–82. http://dx.doi.org/10.4028/www.scientific.net/amm.599-601.1679.

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The IEEE802.11 protocol proposed the CSMA/CA mechanism [1] which is more adjustable to the application of the wireless channel based on CSMA. This article will analyze the property of the traffic in the multi-hop wireless network, give the definitions and the migration relationship of four channel states, provide a model for the traffic of the nodes and describe the relationship among the part of the parameters based on the IEEE802.11 protocol.

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23

Hamamoto, Ryo, Kazuomi Endo, Tomohiro Nakagawa, Hiroshi Togo, Junya Tanaka, Kouji Kanazawa, Kentaro Ishihara, Yuchi Kawagoe, and Takahito Aso. "Characterization of IEEE802.11 WLAN Implementing on Excavator: Can We Use IEEE802.11 for i-construction?" EAI Endorsed Transactions on Internet of Things 7, no. 26 (February 22, 2022): 172996. http://dx.doi.org/10.4108/eai.25-1-2022.172996.

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24

Ohshima, Kohta, Etsuro Shimizu, Taiga Sakai, Masakazu Abe, Katsuhiko Umeno, Masashi Takemoto, Hiroshi Ezoe, and Yusuke Asai. "Attempts to Promote IEEE802.11ah in Japan." Marine Engineering 55, no. 2 (March 1, 2020): 205–10. http://dx.doi.org/10.5988/jime.55.205.

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25

Maqhat, Bakeel, Mohd Dani Baba, Ruhani Ab Rahman, and Anwar Saif. "Scheduler Algorithm for IEEE802.11n Wireless LANs." International Journal of Future Computer and Communication 3, no. 4 (2014): 222–26. http://dx.doi.org/10.7763/ijfcc.2014.v3.300.

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26

Sivanantham, S. "Partial Reconfigurable Implementation of IEEE802.11g OFDM." Indian Journal of Science and Technology 7, is4 (June 22, 2014): 63–70. http://dx.doi.org/10.17485/ijst/2014/v7sp4.3.

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27

Sivanantham, S. "Partial Reconfigurable Implementation of IEEE802.11g OFDM." Indian Journal of Science and Technology 9, no. 1 (January 20, 2016): 1–6. http://dx.doi.org/10.17485/ijst/2015/v8i36/90317.

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28

El-Basioni, Basma M. Mohammad, Abdellatif I. Moustafa, Sherine M. Abd El-Kader, and Hussein A. Konber. "Timing Structure Mechanism of Wireless Sensor Network MAC layer for Monitoring Applications." International Journal of Distributed Systems and Technologies 7, no. 3 (July 2016): 1–20. http://dx.doi.org/10.4018/ijdst.2016070101.

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This paper aims at designing a Timing Structure Mechanism (TSM) for Wireless Sensor Network (WSN) MAC, with specifying its respective logical topology, especially suitable to the monitoring applications, differentiated and characterized from the existing time bounding strategies, paving for a good performance channel access mechanism. The work proposed in this paper is based on classifying the monitoring applications so as to designing efficient setup and benefiting from the node's capabilities in dividing the network into sub-networks. By evaluating TSM against a cluster-tree IEEE802.15.4 in the two cases of one channel and multi-channel clusters, the simulation results showed that with varying the area, the TSM performs better than the two cases of IEEE802.15.4 in terms of lifetime, end-to-end delay, loss percentage by on average 103.44% and 61.84%, 96.59% and 95.37%, and 88.59% and 87.52%, respectively. Also, in case of increasing the node density, TSM is better in terms of the same parameters by on average 446.58% and 356.05%, 98.04% and 95.62%, and 77.62% and 75.2%, respectively.

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29

Yoon, Sang-Hun, Seong-Keun Jin, Dae-Kyo Shin, Ki-Taeg Lim, and Han-Gyun Jung. "Decision Feedback Based Diversity Modem for IEEE802.11p WAVE." Journal of IKEEE 19, no. 3 (September 30, 2015): 400–406. http://dx.doi.org/10.7471/ikeee.2015.19.3.400.

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30

Lee, Myungsub, and Changhyeon Park. "An Analysis of the Radio Interference in Wireless Vehicular Networks based on IEEE802.11b(WLAN)." Journal of the Institute of Webcasting, Internet and Telecommunication 12, no. 6 (December 31, 2012): 117–25. http://dx.doi.org/10.7236/jiwit.2012.12.6.117.

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31

Jin, Da Wei, and Guo Hong Zhang. "Applied Technology in Design of Random Human Information Interactive System Based on Android." Advanced Materials Research 859 (December 2013): 507–10. http://dx.doi.org/10.4028/www.scientific.net/amr.859.507.

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Анотація:

The wireless personal area network combined with the Android platform,a wireless interactive network is introduced and an intelligent mobile random human interactive system is designed .IEEE802.15.4 protocol is used for data transmission, and human computer interaction program is developed in Android platform. A power saving, parameter varying, present-aware network access method is designed.

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32

Chen, Zhe, Debin Hou, Jixin Chen, and Pinpin Yan. "A Low Phase Noise Dual-Loop Dual-Output Frequency Synthesizer in SiGe BiCMOS." Electronics 11, no. 12 (June 9, 2022): 1828. http://dx.doi.org/10.3390/electronics11121828.

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In this article, a dual-loop dual-output frequency synthesizer designed for IEEE802.11aj (45 GHz) standard is presented. In order to support the super-heterodyne transceiver, the Loop1 output frequency is fixed for easy design of high-performance IF transceiver and filter, and the Loop2 output frequency varies for the channel selection according to the IEEE802.11aj (45 GHz) standard. The power hungry high-speed prescaler (or multi-modulus-divider) is replaced with a mixer in Loop2, thus the in-band phase noise and DC power consumption can be improved. The dual-loop dual-output synthesizer is fabricated in 0.13 µm SiGe BiCMOS technology, occupies an area of 2.7 mm × 2.4 mm, and consumes 610 mW DC power. Measured results show the phase noise of the frequency synthesizer are −79.3 dBc/Hz@10 kHz and −129.1 dBc/Hz@10 MHz at 12.96 GHz for Output1 and −76.6 dBc/Hz@10 kHz and −117.2 dBc/Hz@10 MHz at 32.535 GHz for Output2. The low-reference spur of −69.2 dBc and low-power level spurious tones at the outputs are observed during the measurement. To the best of our knowledge, this work is the first reported dual-loop dual-output synthesizer designed for IEEE802.11aj (45 GHz) standard.

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33

Yadav, Shalini, Rahul Rishi, Yudhvir Singh, Zaid khudhur Hussein, Ahmed Ayoob Ibrahim, and Sajjad Ali Ettyem. "Traffic Management in Ad-Hoc Network by Selection of Suitable Routing Protocol." Journal of Physics: Conference Series 2322, no. 1 (August 1, 2022): 012096. http://dx.doi.org/10.1088/1742-6596/2322/1/012096.

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Abstract The need for traffic management has risen at the same pace as the number of cars has changed dramatically. Even though VANET and MANET have seen tremendous growth, traffic management is still essential. There is a demand for effective traffic management among the vehicles, which necessitates their communication ability. Routing protocols facilitate the transmission of data between vehicles. There are several routing protocols in a MANET, and choosing the optimal one is challenging. The IEEE802.11p standard is used for data transfer via routing protocols in the current operational environment. C-V2X is a developing technology superior to IEEE802.11p in terms of efficiency. Qualcomm is the creator of C-V2X. AODV, AMODV, and MDART are some appropriate routing protocols for evaluation. The Average End-to-End Delay, Average Throughput, and Packet Delivery Ratio of each protocol are analyzed. The Network Simulator 2.35 (NS2) simulates these routing protocols. This article concludes that the performance of C-V2X using AOMDV protocols is superior to that of IEEE802.11p. This research claims that AOMDV’s architecture might be improved to provide more accurate figures for the average end-to-end latency.

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34

Zhong, Lun-gui, Hai-gang Yang, Fei Liu, Tong-qiang Gao, and Hui Zhang. "A Fully Integrated CMOS Complex Filter for IEEE802.15.4 Standard." Journal of Electronics & Information Technology 32, no. 11 (December 10, 2010): 2740–45. http://dx.doi.org/10.3724/sp.j.1146.2009.01495.

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35

Feng, Bin, De-yu Qi, and Hai-wen Han. "Instruction Set Extension Implementation for AES-CCM in IEEE802.15.4." Journal of Electronics & Information Technology 35, no. 2 (February 18, 2014): 335–40. http://dx.doi.org/10.3724/sp.j.1146.2012.00854.

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36

Pasolini, Gianni, Chiara Buratti, Luca Feltrin, Flavio Zabini, Cristina De Castro, Roberto Verdone, and Oreste Andrisano. "Smart City Pilot Projects Using LoRa and IEEE802.15.4 Technologies." Sensors 18, no. 4 (April 6, 2018): 1118. http://dx.doi.org/10.3390/s18041118.

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37

Retz, G., H. Shanan, K. Mulvaney, S. O'mahony, M. Chanca, P. Crowley, C. Billon, M. Khan, J. Lopez Orive, and P. Quinlan. "Radio transceivers for wireless personal area networks using IEEE802.15.4." IEEE Communications Magazine 47, no. 9 (September 2009): 150–58. http://dx.doi.org/10.1109/mcom.2009.5277469.

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38

Aono, Tomoyuki, Keisuke Higuchi, Takashi Ohira, Bokuji Komiyama, and Hideichi Sasaoka. "IEEE802.15.4 ESPARSKey (Encryption Scheme Parasite Array Radiator Secret Key)." Electronics and Communications in Japan (Part I: Communications) 89, no. 12 (2006): 31–44. http://dx.doi.org/10.1002/ecja.20305.

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39

Kong, Xiangming, Deying Zhang, and Mohin Ahmed. "A Software-Defined Radio System for Intravehicular Wireless Sensor Networks." International Journal of Digital Multimedia Broadcasting 2010 (2010): 1–8. http://dx.doi.org/10.1155/2010/934896.

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Анотація:

An intra-vehicular wireless sensor network is designed and implemented on a software-defined radio system. IUWB signal is chosen to carry the data packets. The MAC layer of the system follows the specification of the IEEE802.15.4 standard. The transceiver design, especially the receiver design, is detailed in the paper. The system design is validated through lab test setup.

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40

Воропай, О. В., С. С. Погасій, О. Г. Король, and С. В. Мілевський. "Development of security mechanisms for scada systems in the postquantium period." Системи обробки інформації, no. 2 (169) (June 9, 2022): 25–34. http://dx.doi.org/10.30748/soi.2022.169.03.

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Анотація:

The formation of new systems based on the synthesis of mobile Internet technologies with cyberspace significantly expands the possibilities of creating smart technologies based on mesh and sensor networks. This allows to significantly increase the speed of information transmission using modern wireless communication channels based on technology standards IEEE802.16, IEEE802.16e, IEEE802.15.4, IEEE802.11, Bluetooth 5, 6. It is possible to use SCADA automation and scheduling systems with new functions of managing information flows of various technological processes, to create new principles for building hyperphysical social systems (CPSS) – a set of subjects and objects of cybernetic, physical and social worlds that allow to form “smart” communities, on the one hand , and intellectual space on the other. However, the development of modern computer systems, the advent of full-scale quantum computers significantly impairs the security of modern security systems. According to NIST experts, a full-scale quantum computer breaks both symmetric and asymmetric cryptosystems in polynomial time, which significantly reduces their stability. The goal of the work is to develop mechanisms for providing security services based on post-quantum algorithms - crypto-code constructions. To ensure security in the post-quantum period – the emergence of a full-scale quantum computer, NIST specialists suggest the use of post-quantum algorithms. Structural schemes of crypto-code constructions of McEliece and Niederreiter on algebrogeometric codes are used in the work. The paper proposes mechanisms of post-quantum cryptography, which allow to ensure the stability of not only communication channels, but also elements of the structure of the management system of SCADA systems, not only in critical infrastructure, but also in modern wireless communication channels. The basis of post-quantum encryption algorithms is the combination of algorithms (schemes) of crypto-code structures with cryptosystems on unprofitable codes (multi-channel cryptography), as well as the possibility of combining them with digital steganography methods. The developed approach provides the ability to hide elements of management commands, and the use of different channels provides the ability to hide individual elements of cryptograms. The use of post-quantum encryption algorithms provides a significant increase in the cryptographic stability of security mechanisms SCADA-systems.

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41

Kalis, A., and T. Antonakopoulos. "Direction finding in IEEE802.11 wireless networks." IEEE Transactions on Instrumentation and Measurement 51, no. 5 (October 2002): 940–48. http://dx.doi.org/10.1109/tim.2002.807806.

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42

Yang, Wei, Jie He, Yue Qi, Ruijie Zhang, and Qin Wang. "STS_4e: Secure Time Synchronization in IEEE802.15.4e Networks." International Journal of Wireless Information Networks 23, no. 4 (September 13, 2016): 283–96. http://dx.doi.org/10.1007/s10776-016-0322-3.

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43

Chang, Tengfei, Thomas Watteyne, Brad Wheeler, Filip Maksimovic, Osama Khan, Sahar Mesri, Lydia Lee та ін. "6TiSCH on SCμM: Running a Synchronized Protocol Stack without Crystals". Sensors 20, № 7 (30 березня 2020): 1912. http://dx.doi.org/10.3390/s20071912.

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Анотація:

We report the first time-synchronized protocol stack running on a crystal-free device. We use an early prototype of the Single-Chip micro Mote, SCμM, a single-chip 2 × 3 mm2 mote-on-a-chip, which features an ARM Cortex-M0 micro-controller and an IEEE802.15.4 radio. This prototype consists of an FPGA version of the micro-controller, connected to the SCμM chip which implements the radio front-end. We port OpenWSN, a reference implementation of a synchronized protocol stack, onto SCμM. The challenge is that SCμM has only on-chip oscillators, with no absolute time reference such as a crystal. We use two calibration steps – receiving packets via the on-chip optical receiver and RF transceiver – to initially calibrate the oscillators on SCμM so that it can send frames to an off-the-shelf IEEE802.15.4 radio. We then use a digital trimming compensation algorithm based on tick skipping to turn a 567 ppm apparent drift into a 10 ppm drift. This allows us to run a full-featured standards-compliant 6TiSCH network between one SCμM and one OpenMote. This is a step towards realizing the smart dust vision of ultra-small and cheap ubiquitous wireless devices.

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44

Shang, Fengjun, Qiang Fu, and Ran Mao. "Unbalanced GTS Assignment Mechanism based on Delay Constraint in IEEE802.15.4." International Journal of Future Generation Communication and Networking 9, no. 7 (July 31, 2016): 113–22. http://dx.doi.org/10.14257/ijfgcn.2016.9.7.11.

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45

Tian, Qian Qian, and Jin Hai Wang. "Analysis and Improvement of ZigBee Wireless Networks Route." Advanced Materials Research 468-471 (February 2012): 324–27. http://dx.doi.org/10.4028/www.scientific.net/amr.468-471.324.

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ZigBee is an emerging shortrange wireless network technology which based on IEEE802.15.4,but increase in nodes and forwarding data packets significantly reduces the network life cycle.First analysis the two basic routing algorithms in details,then two advanced algorithms resulting from node energy are proposed.The simulation of performance using NS2 indicates that in the same condition the improved routing algorithms can reduce the death of nodes and prolong the network life cycle.

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46

K, Krishna Naik, and M. N. Giri Prasad. "IAPP for IEEE802.11 WLAN with Improved Range." i-manager's Journal on Software Engineering 1, no. 4 (June 15, 2007): 31–38. http://dx.doi.org/10.26634/jse.1.4.740.

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47

Wei, Zi Hui, Zheng He Feng, Zhi Feng Wang, and Duan Bo Cai. "Precise Ranging Technology Application Research Based on IEEE802.15.4a." Applied Mechanics and Materials 631-632 (September 2014): 558–62. http://dx.doi.org/10.4028/www.scientific.net/amm.631-632.558.

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To solve the poor location accuracy of wireless sensor networks using Received Signal Strength Indication (RSSI) ranging. Time Of Flight (TOF) ranging is used to ensure the accuracy based on two optional physical layer of Impulse Radio-Ultra Wide-Band (IR-UWB) and Chirp Spread Spectrum (CSS) in IEEE802.15.4a. In this paper, we designed ranging module utilizing CSS and UWB. In the Line Of Sight (LOS) and None Line Of Sight (NLOS) environments ranging accuracy test is implemented, the test results show that the IR-UWB ranging technology can achieve higher ranging accuracy and better multipath resistance compared to CSS.

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48

Shahin, Nurullah, Rashid Ali, Sung Won Kim, and Young-Tak Kim. "Cognitive backoff mechanism for IEEE802.11ax high-efficiency WLANs." Journal of Communications and Networks 21, no. 2 (April 2019): 158–67. http://dx.doi.org/10.1109/jcn.2019.000022.

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49

Yang, Wei, Qin Wang, Yadong Wan, and Yue Qi. "Time synchronisation attacks and defences in IEEE802.15.4e networks." International Journal of Embedded Systems 9, no. 6 (2017): 548. http://dx.doi.org/10.1504/ijes.2017.088031.

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50

Wang, Qin, Yue Qi, Yadong Wan, and Wei Yang. "Time synchronisation attacks and defences in IEEE802.15.4e networks." International Journal of Embedded Systems 9, no. 6 (2017): 548. http://dx.doi.org/10.1504/ijes.2017.10008941.

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