Academic literature on the topic 'Lr-wpan'
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Journal articles on the topic "Lr-wpan"
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.
Full textPark, Mincheol, Dongchan Lee, Soohyun Jang, and Yunho Jung. "Design of Time Synchronizer for Advanced LR-WPAN Systems." Journal of Korea Navigation Institute 18, no. 5 (October 30, 2014): 476–82. http://dx.doi.org/10.12673/jant.2014.18.5.476.
Full textLee, Dong-Chan, Soo-Hyun Jang, and Yun-Ho Jung. "Disign of Non-coherent Demodulator for LR-WPAN Systems." Journal of Korea Navigation Institute 17, no. 6 (December 30, 2013): 705–11. http://dx.doi.org/10.12673/jkoni.2013.17.6.705.
Full textLee, Kang-Woo, Youn-Soon Shin, Gyu-Wan Hyun, Jong-Suk Ahn, and Hie-Cheol Kim. "An Analytical Model for LR-WPAN Performance in the Presence of Hidden Nodes." KIPS Transactions:PartC 16C, no. 1 (February 28, 2009): 133–42. http://dx.doi.org/10.3745/kipstc.2009.16-c.1.133.
Full textCho, Moo-Ho. "Performance Analysis of Real-time Retransmission in LR-WPAN." Journal of the Korea Industrial Information Systems Research 16, no. 5 (December 30, 2011): 21–30. http://dx.doi.org/10.9723/jksiis.2011.16.5.021.
Full textLee, Jong-Bae, and Seongsoo Lee. "Implementation of 868/915 MHz LR-WPAN Transceiver for IoT Systems." Journal of IKEEE 20, no. 1 (March 31, 2016): 107–10. http://dx.doi.org/10.7471/ikeee.2016.20.1.107.
Full textChoudhary, Neeraj, and Ajay K. Sharma. "Performance Evaluation of LR-WPAN for different Path-Loss Models." International Journal of Computer Applications 7, no. 10 (October 10, 2010): 22–28. http://dx.doi.org/10.5120/1284-1698.
Full textKim, Woonhong, Yunho Jung, Seongjoo Lee, and Jaeseok Kim. "Low complexity demodulation scheme for IEEE 802.15.4 LR-WPAN systems." IEICE Electronics Express 5, no. 14 (2008): 490–96. http://dx.doi.org/10.1587/elex.5.490.
Full textHAN, S., S. LEE, S. LEE, and Y. KIM. "Channel Allocation Algorithms for Coexistence of LR-WPAN with WLAN." IEICE Transactions on Communications E91-B, no. 5 (May 1, 2008): 1627–31. http://dx.doi.org/10.1093/ietcom/e91-b.5.1627.
Full textPark, Sung-Woo. "An Adaptive Back-off Algorithm in Beacon-Enabled LR-WPAN." Journal of the Korea institute of electronic communication sciences 11, no. 8 (August 31, 2016): 735–42. http://dx.doi.org/10.13067/jkiecs.2016.11.8.735.
Full textDissertations / Theses on the topic "Lr-wpan"
Alberts, Marthinus. "Analysis of the IEEE 802.15.4a ultra wideband physical layer through wireless sensor network simulations in OMNET++." Diss., University of Pretoria, 2011. http://hdl.handle.net/2263/23103.
Full textDissertation (MEng)--University of Pretoria, 2011.
Electrical, Electronic and Computer Engineering
unrestricted
Silva, Diego Cesar Valente e. "An?lise experimental da aplica??o da tecnologia de r?dio sobre fibra em redes IEEE 802.15.4." Pontif?cia Universidade Cat?lica de Campinas, 2009. http://tede.bibliotecadigital.puc-campinas.edu.br:8080/jspui/handle/tede/505.
Full textThis work presents an experimental investigation on the implementation of wireless sensor networks (IEEE 802.15.4) over fiber optics. Such investigation was performed with the utilization of IEEE 802.15.4 transceivers, an optical fiber infrastructure inside a field-trial network, called KyaTera Network, and directly modulated lasers and photodiodes designed for usual lab applications. The analysis comprised optical and electrical signal-to-noise ratio meausermentes and packet error rate evaluation under different conditions of transmission (e.g., payload length and time between consecutive frames). Results indicate that the RF signals of the sensor network may be properly propagated through unamplified optical links of up to 100 km or for longer distances with the use of optical amplifiers.
Esse trabalho apresenta uma investiga??o experimental da implementa??o de redes de sensores (IEEE 802.15.4) sobre fibras ?pticas. Tal investiga??o foi realizada com a utiliza??o de transceptores IEEE 802.15.4, de uma infra-estrutura de fibras ?pticas localizada dentro uma rede experimental, chamada Rede KyaTera, e de lasers com modula??o direta e foto-diodos projetados para opera??es usuais em laborat?rios. A an?lise compreendeu medidas a raz?o sinal-ru?do ?ptica e el?trica e a avalia??o da taxa de erro de quadros sob diferentes condi??es de transmiss?o (p. ex., tamanho de payload e intervalo de tempo entre quadros sucessivos). Os resultados indicam que os sinais de RF da rede de sensores podem ser propagados adequadamente, sem amplifica??o ?pticapor, em enlaces de at? 100 km ou por dist?ncias ainda maiores, com a utiliza??o de amplificadores ?pticos.
Kapoun, Vladislav. "Simulační model veřejného osvětlení pro Network Simlator 3." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-220386.
Full textFuchs, Michal. "Řízení bezdrátové komunikace pomocí ZigBee." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217534.
Full textYANG, SHIH-CHENG, and 楊士承. "Enhanced GTS Allocation Scheme(EGAS) in IEEE 802.15.4 LR-WPAN." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/brec3w.
Full text國立臺灣科技大學
電機工程系
99
Wireless sensor network (WSN) is a network system formed by many sensors. The sensors communicate with each other by wireless transmission. In contrast with wire transmission, wiring is needless. WSN has some special requirements such as low rate, low cost, and low power. IEEE 802.15.4 standard defines WSN operating at physical and MAC layer, so the standard is just fit for the properties. In the IEEE 802.15.4, system can provide special time period for device with high quality of service (QoS) requirement. When a device is already decided to transmit data in this period, it will not have to content channel with others. The period is called contention-free period (CFP). CFP use the slot in superframe structure as transmission unit. These slots are called guaranteed time slots (GTSs). A GTSs can contain one or more slots to transmit data. The above transmission method brings that a portion of slot is unused, so it wastes space of slot and lowers transmission efficiency. When the value of superframe order (SO) increases, the situation becomes clearer. To solve the above-mentioned problem about waste of unused slot, we propose Enhanced GTS Allocation Scheme(EGAS) to promote utilization of GTSs in CFP. Through simulating by program, we compare our proposed scheme, IEEE 802.15.4 standard, and some previous schemes. Our proposed scheme has improvement on the others about average bandwidth utilization of CFP, CFP goodput, ratio of CFP, and drop ratio of CFP.
Chou, Yun-li, and 周允莉. "Efficient Mechanism for GTS Allocation(EMGA)in IEEE 802.15.4 LR-WPAN." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/09398155898182414036.
Full text國立臺灣科技大學
電機工程系
97
Wireless sensor network (WSN) is composed of many sensor nodes. IEEE 802.15.4 standard defines some specifications for low-rate wireless personal area networks (WPAN), and it can apply in WSN. IEEE 802.15.4 standard can optionally use contention-free period (CFP) to transmit data. CFP can reduce the probability of collision from transmission and promote overall goodput, when WSN is heavy-loaded or need quality of service (QoS). IEEE 802.15.4 standard defines the portion of CFP, so sensor nodes will transmit data without contention. However, CFP allocate guaranteed time slots (GTSs) based on unit time slot, and then CFP shall have the waste problem because the partial bandwidth has not been used. This problem is more obvious in the low-loaded network, and when the value of superframe order (SO) gradually increases, which results in the partial bandwidth has not been used, so waste problem will become worse. In order to solve the bandwidth waste of CFP, we propose efficient mechanism for GTS allocation (EMGA). This mechanism can promote utilization of GTSs when sensor nodes transmit data in CFP. Thus, GTSs can promote utilization of CFP and improve overall network’s efficiency. By simulations, we compare our mechanism with IEEE 802.15.4 standard and a new GTS allocation scheme, the goodput and utilization of CFP are promoted a lot in overall network, and the waste portion of GTS’s bandwidth is also reduced.
Lin, Yu-pei, and 林裕培. "Study on Dynamic GTS Allocation Scheme (DGAS) in IEEE 802.15.4 LR-WPAN." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/65048354666304552857.
Full text國立臺灣科技大學
電機工程系
98
IEEE 802.15.4 low-rate wireless personal area networks is a set of near field communication standard, it is characteristic of low cost, low power, and flexible transfer rate, therefore it can apply in WSN. In order to meet the need of fixed bandwidth and time sensitive application, IEEE 802.15.4 standard can optionally use contention-free period (CFP) to transmit data. To reduce the probability of collision from transmission and promote wireless sensor network goodput when the load increase. By IEEE 802.15.4 standard definition, in contention-free period, each guaranteed time slots (GTSs) is composed by more than one time slots, and provide use of single device, because CFP allocate guaranteed time slots based on unit time slot, so bandwidth allocation greater than bandwidth required, and then CFP shall have the waste problem, when the value of superframe order (SO) increases , to the unit slot larger, so waste problem will become worse. In order to solve the above-mentioned problems, we propose dynamic GTS allocation scheme (DGAS). by this mechanism can promote utilization of CFP, and reduce the bandwidth waste. We compare our proposed scheme, IEEE 802.15.4 standard, and some previous schemes by simulations, the simulation results of CFP utilization, goodput and power consumption shows the improvement of our scheme.
Huang, Chung-min, and 黃崇閔. "Adaptive Transmission Using Guarantee Time Slot (ATUGTS) in IEEE 802.15.4 LR-WPAN." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/91958130583613368019.
Full text國立臺灣科技大學
電機工程系
97
Wireless sensor networks are often used in military, agriculture, construction and other needs of large coverage and long operating hours of the applications. In order to meet the needs of such applications and to extend the network lifetime, wireless sensor network must increase the number of sensor nodes as the network coverage become bigger. However, a large number of sensor nodes will increase the probability of transmission collision, and this is the main cause to decrease entire network goodput and reduce the network's lifetime. By IEEE 802.15.4 standard, in contention access period (CAP), sensor nodes use CSMA/CA algorithm to access channel before transmitting data, and this method will have high efficiency when the traffic load is low. Besides, this method will decrease performance when the number of sensor nodes increase and heavy traffic load. In order to meet the need of fixed bandwidth and time sensitive application, IEEE 802.15.4 standard define another transmission period called contention free period (CFP), under this period that sensor nodes can transmit data without contention. Although using CFP under low traffic load can cause lower bandwidth utilization, but this method can effectively avoid collision and increase bandwidth utilization when traffic load is heavy. According to traffic load and other parameter, if we can dynamically change sensor transmit method between CAP and CFP, we can improve whole network transmission efficiency. In order to combine both advantages, we propose adaptive transmission using guarantee time slot (ATUGTS), that sensor nodes can adaptively request using contention free portion to transmit data. The coordinator will be in accordance with the required size of the transmission slot allocated to the most appropriate sensor nodes to enhance the overall network performance. From the simulation results, the proposed method shows better performance in goodput, power consumption, utilization of guarantee time slot which has the advantages of the combination of only using CAP and only using CFP.
Lian, Jhen-hong, and 連振宏. "A study on adaptive superframe adjustment scheme (ASFAS) in IEEE 802.15.4 LR-WPAN." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/18686258334401435981.
Full text國立臺灣科技大學
電機工程系
96
Wireless sensor networks (WSN) is constituted by a large number of sensor nodes. In order to satisfy the application requirement, most sensor nodes use battery as its main energy source. Furthermore, energy consumption has been very important research topic in wireless sensor networks. With higher traffic load, the collision probability will be higher. Thus, the power consumption of sensor node will be increased, and the life time of wireless sensor networks will be decreased. In IEEE 802.15.4 standard, superframe structure is used for data transmission. However, the duty cycle of the superframe structure cannot be dynamically adjusted according to the situation of entire network. Thus, when the number of devices and traffic load increase, the insufficient of active periods will decrease the transmission opportunities of devices and increase the collision probability. Thus, the above problems will cause the performance of entire network deteriorated. In order to solve the above mentioned problems, we proposed the adaptive superframe adjustment scheme (ASFAS), it can dynamically adjust the duty cycle of the superframe according to the certain features observed by the coordinator, like the occupied proportion of superframe and collision proportion of devices. Thus, it can increase transmission opportunities of devices and improve the performance of entire network. We will compare our proposed scheme with some previous schemes and IEEE 802.15.4 standard through simulations. The simulation results of goodput, delay and power consumption shows the improvement of our scheme.
Shih, Yu-han, and 石育函. "Enhanced Grouping Strategy for Solving Hidden Node Problem in IEEE 802.15.4 LR-WPAN Compatible." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/nv4zn6.
Full text國立臺灣科技大學
電機工程系
95
Wireless sensor networks (WSN) is composed of by sensor nodes. Due to its operational environment of sensor nodes, the battery is used as its main energy source. Therefore its design must meet a simple, cheap, low-power, long-term operation considerations. In particular, the use of energy efficiency has been very important research topics. In the IEEE 802.15.4 standard, MAC layer include modified CSMA/CA algorithm to achieve smaller energy consumption. However, such an algorithm can't prevent hidden node problem(HNP). In previous studies have found that if the node distribution is uniform, the probability of occurrence of HNP is as high as 41%. So, this problem will results in data collision, repeated transmission of data, and a large amount of energy consumption, thus lowering wireless sensor networks lifetime. In view of the past to avoid HNP, like RTS/CTS(request to send/clear to send) mechanism is not suitable for use under the IEEE 802.15.4 standard. Under the prerequisite of not increasing additional overhead of sensor network, we refer to the concept of group strategy. Grouping strategy divide the transmission time into several segments, and the entire network of nodes can be divided into several groups, the largest of six groups. Each group has its own access segments, and in the group HNP must not exist. When the coordinator found the HNP is exist, it will begin the implementation of a mechanism to avoid the recurrence of HNP. In this thesis, we proposed the enhanced group strategy, it effectively improves the disadvantage of traditional grouping strategy. In addition, our strategy improves the compatibility with the standard IEEE 802.15.4 nodes, it can be made at the appropriate time transmission, and will not have a collision with the grouping node. It can also dynamically adjust the access time of each group, in line with the efficient use of the bandwidth. Through simulations, we compare our proposed strategy, previous grouping strategy, and the IEEE 802.15.4 standard. The simulation results show that our strategy has a better result.
Book chapters on the topic "Lr-wpan"
Chen, Qigong, Junjie Wang, Ming Jiang, Wengen Gao, and Lei Liu. "Improved AODVjr Algorithm in LR-WPAN." In Lecture Notes in Electrical Engineering, 259–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-40618-8_33.
Full textLee, Hyeopgeon, Aran Kim, and Yongtae Shin. "Retransmission Algorithm for Channel Allocation in IEEE 802.15.4 LR-WPAN." In Convergence and Hybrid Information Technology, 657–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-32645-5_82.
Full textCho, Dong-Hoon, Jung-Hoon Song, and Ki-Jun Han. "An Adaptive Energy Saving Mechanism for the IEEE 802.15.4 LR-WPAN." In Wireless Algorithms, Systems, and Applications, 38–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11814856_6.
Full textRen, Zhi, Yan Liu, Jianlin Cao, and Hongjiang Lei. "An Efficient and Rapid Address Assignment Algorithm for LR-WPAN Meshes." In Communications in Computer and Information Science, 813–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-35211-9_103.
Full textIrfan Khan, Mohammad, and Rakesh Rathi. "An Adaptive Grouping Scheme for Avoiding Hidden Node Collision in IEEE 802.15.4 LR-WPAN." In Emerging Research in Computing, Information, Communication and Applications, 99–107. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4741-1_10.
Full textRahajandraibe, Wenceslas, Lakhdar Zaid, and Fayrouz H. "Fully Integrated CMOS Low-Gain-Wide-Range 2.4 GHz Phase Locked Loop for LR-WPAN Applications." In Mobile and Wireless Communications Network Layer and Circuit Level Design. InTech, 2010. http://dx.doi.org/10.5772/7704.
Full textLin, Cheng-Min, and Tzong-Jye Liu. "Data Communications Inside Vehicular Environments." In Wireless Technologies, 847–62. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-61350-101-6.ch320.
Full textConference papers on the topic "Lr-wpan"
Park, Choong-Bum, Byung-Sung Park, Kyung-Min Park, Huy-Jung Uhm, and Hoon Choi. "LR-WPAN based weighing scales and smartphones." In 2011 IEEE International Conference on Consumer Electronics (ICCE). IEEE, 2011. http://dx.doi.org/10.1109/icce.2011.5722684.
Full textAnwar, Fatima M., and Mani B. Srivastava. "Precision time protocol over LR-WPAN and 6LoWPAN." In 2017 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control, and Communication (ISPCS). IEEE, 2017. http://dx.doi.org/10.1109/ispcs.2017.8056739.
Full textArif, M. A. Mohd, L. M. Kamarudin, A. Y. Md Shakaff, M. N. Ahmad, and R. B. Ahmad. "Outdoor Propagation Analysis for LR-WPAN IEEE 802.15.4." In 2010 Second International Conference on Network Applications Protocols and Services (NETAPPS). IEEE, 2010. http://dx.doi.org/10.1109/netapps.2010.44.
Full textChoudhury, Nikumani, Rakesh Matam, and Vaskar Deka. "Priority based ZigBee routing protocol for LR-WPAN." In 2016 IEEE Students’ Technology Symposium (TechSym). IEEE, 2016. http://dx.doi.org/10.1109/techsym.2016.7872681.
Full textLee, Bih-Hwang, and Huai-Kuei Wu. "Study on Backoff Algorithm for IEEE 802.15.4 LR-WPAN." In 22nd International Conference on Advanced Information Networking and Applications (aina 2008). IEEE, 2008. http://dx.doi.org/10.1109/aina.2008.71.
Full textSchwetlick, Horst, and Alexander Huhn. "A universal receiver concept for multi-system LR-WPAN." In 2009 IEEE 13th International Symposium on Consumer Electronics. IEEE, 2009. http://dx.doi.org/10.1109/isce.2009.5156862.
Full textRamonet, Alberto Gallegos, and Taku Noguchi. "LR-WPAN: Beacon Enabled Direct Transmissions on Ns-3." In ICCIP 2020: 2020 the 6th International Conference on Communication and Information Processing. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3442555.3442574.
Full textKo, Su-Hwan, and Jung-Kyu lee. "Limited Contention Scheme (LCS) to Reduce Collision in LR-WPAN." In 2009 Fifth International Joint Conference on INC, IMS and IDC. IEEE, 2009. http://dx.doi.org/10.1109/ncm.2009.44.
Full textChen, Feng, Nan Wang, Reinhard German, and Falko Dressler. "Performance Evaluation of IEEE 802.15.4 LR-WPAN for Industrial Applications." In 2008 Fifth Annual Conference on Wireless on Demand Network Systems and Services. IEEE, 2008. http://dx.doi.org/10.1109/wons.2008.4459361.
Full textChoi, Eunchang, YunKang Hur, Jaedoo Huh, Yoonseok Nam, DaeHun Yoo, and WoongChul Choi. "Simulation and Implementation of Voice-Over-IEEE 802.15.4 LR-WPAN." In 2008 International Conference on Consumer Electronics (ICCE). IEEE, 2008. http://dx.doi.org/10.1109/icce.2008.4588027.
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