Letteratura scientifica selezionata sul tema "Random access efficiency"
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Articoli di riviste sul tema "Random access efficiency"
Zhang, Naiyin, Kaiyin Zha e Junchao Wang. "Exploring the Design Efficiency of Random Microfluidic Mixers". IEEE Access 9 (2021): 9864–72. http://dx.doi.org/10.1109/access.2021.3050161.
Testo completoSun, Yi. "Spectral Efficiency and Optimal Medium Access Control of Random Access Systems over Large Random Spreading CDMA". IEEE Transactions on Communications 57, n. 5 (maggio 2009): 1256–60. http://dx.doi.org/10.1109/tcomm.2009.05.07044.
Testo completoZheng, Yuankai, Yihong Wu, Kebin Li, Jinjun Qiu, Guchang Han, Zaibing Guo, Ping Luo et al. "Magnetic Random Access Memory (MRAM)". Journal of Nanoscience and Nanotechnology 7, n. 1 (1 gennaio 2007): 117–37. http://dx.doi.org/10.1166/jnn.2007.18010.
Testo completoMisic, Jelena, e Vojislav B. Misic. "Efficiency of Power Ramping During Random Access in LTE". IEEE Transactions on Vehicular Technology 67, n. 2 (febbraio 2018): 1698–712. http://dx.doi.org/10.1109/tvt.2017.2757034.
Testo completoKwon, Jae-Hong, Young-Chai Ko e Sung Sik Nam. "Optimal Design of Random Unitary Beamforming for Energy Efficiency in MIMO Broadcast Channels". IEEE Access 5 (2017): 12865–77. http://dx.doi.org/10.1109/access.2017.2723078.
Testo completoBarangi, Mahmood, e Pinaki Mazumder. "Straintronics: A leap toward ultimate energy efficiency of magnetic random access memories." IEEE Nanotechnology Magazine 9, n. 3 (settembre 2015): 15–24. http://dx.doi.org/10.1109/mnano.2015.2441106.
Testo completoVilgelm, Mikhail, Sergio Rueda Linares e Wolfgang Kellerer. "On the Resource Consumption of M2M Random Access: Efficiency and Pareto Optimality". IEEE Wireless Communications Letters 8, n. 3 (giugno 2019): 709–12. http://dx.doi.org/10.1109/lwc.2018.2886892.
Testo completoKim, Youngboo, Lam Kwon e Eun-Chan Park. "OFDMA Backoff Control Scheme for Improving Channel Efficiency in the Dynamic Network Environment of IEEE 802.11ax WLANs". Sensors 21, n. 15 (28 luglio 2021): 5111. http://dx.doi.org/10.3390/s21155111.
Testo completoSong, Kyungmi, e Kyung-Jin Lee. "Spin-transfer-torque efficiency enhanced by edge-damage of perpendicular magnetic random access memories". Journal of Applied Physics 118, n. 5 (7 agosto 2015): 053912. http://dx.doi.org/10.1063/1.4928205.
Testo completoBeigrezaei, Mahsa, Abolfazel Toroghi Haghighat e Seyedeh Leili Mirtaheri. "Improve Performance by a Fuzzy-Based Dynamic Replication Algorithm in Grid, Cloud, and Fog". Mathematical Problems in Engineering 2021 (21 giugno 2021): 1–14. http://dx.doi.org/10.1155/2021/5522026.
Testo completoTesi sul tema "Random access efficiency"
Filho, José Carlos Marinello. "Energy and spectral efficiency optimization in multiuser massive MIMO Comunications systems". Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3142/tde-03102018-142636/.
Testo completoSistemas de comunicação de múltiplas antenas (multiple-input multiple-output - MIMO) têm se destacado como a principal tecnologia para a camada física dos padrões de comunicação da próxima geração, como o 5G. Enquanto a comunicação convencional entre a estação base (base station - BS) e seus usuários atendidos é realizada em recursos ortogonais de tempo-frequência, a grande capacidade de redução da interferência interusuários possibilitada pelo grande número de antenas da BS habilita a BS a se comunicar com diversos usuários no mesmo recurso tempo-frequência. Este melhor uso do escasso espectro disponível eleva a eficiência espectral a níveis muito apreciáveis, e tem um efeito similar na eficiência energética, pois a potência de transmissão não é aumentada. Por outro lado, se o objetivo é fornecer um desempenho desejado para os usuários, a potência de transmissão necessária em ambos os enlaces direto e reverso pode ser feita inversamente proporcional ao número de antenas na BS. Nesta Tese de Doutorado, diversos aspectos importantes de sistemas MIMO massivo são sistematicamente investigados com o objetivo de melhorar suas eficiências energética e espectral. Pode-se enumerar as principais contribuições alcançadas como se segue. Considerando uma rede celular MIMO massivo, propõe-se uma política de atribuição de sequências de treinamento aos usuários otimizada, a qual é depois combinada com apropriados algoritmos de controle de potência. Também investiga-se a adoção neste cenário de formas de onda alternativas, tal como a transmissão de portadora única, visando superar as deficiências da convencional multiplexagem por divisão de portadoras ortogonais (orthogonal frequency-division multiplexing - OFDM). As principais contribuições obtidas neste tema são derivar expressões de desempenho analíticas para um equalizador de portadora única no domínio do tempo que aproveita o grande número de antenas na BS, e avaliar e comparar a eficiência energética total de sistemas MIMO massivo OFDM versus portadora única. Finalmente, considerando redes MIMO massivo sobrecarregadas, compostas por usuários humanos bem como dispositivos de comunicação do tipo máquina, propõe-se um protocolo de acesso aleatório melhorado visando diminuir o número médio de tentativas de acesso para os usuários e diminuir a probabilidade de falhas de tentativa de acesso.
Leung, Raymond Electrical Engineering & Telecommunications Faculty of Engineering UNSW. "Scalable video compression with optimized visual performance and random accessibility". Awarded by:University of New South Wales. Electrical Engineering and Telecommunications, 2006. http://handle.unsw.edu.au/1959.4/24192.
Testo completoHan, Chong. "Analysis and design of efficient medium access control schemes for vehicular ad-hoc networks". Thesis, University of Surrey, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.576087.
Testo completoRasquinha, Mitchelle. "An energy efficient cache design using spin torque transfer (STT) RAM". Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42715.
Testo completoChen, Zhi. "Power-Efficient and Low-Latency Memory Access for CMP Systems with Heterogeneous Scratchpad On-Chip Memory". UKnowledge, 2013. http://uknowledge.uky.edu/ece_etds/25.
Testo completoForsberg, Daniel. "An efficient wavelet representation for large medical image stacks". Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8394.
Testo completoLike the rest of the society modern health care has to deal with the ever increasing information flow. Imaging modalities such as CT, MRI, US, SPECT and PET just keep producing more and more data. Especially CT and MRI and their 3D image stacks cause problems in terms of how to effectively handle these data sets. Usually a PACS is used to manage the information flow. Since a PACS often is implemented with a server-client setup, the management of these large data sets requires an efficient representation of medical image stacks that minimizes the amount of data transmitted between server and client and that efficiently supports the workflow of a practitioner.
In this thesis an efficient wavelet representation for large medical image stacks is proposed for the use in a PACS. The representation supports features such as lossless viewing, random access, ROI-viewing, scalable resolution, thick slab viewing and progressive transmission. All of these features are believed to be essential to form an efficient tool for navigation and reconstruction of an image stack.
The proposed wavelet representation has also been implemented and found to be better in terms of memory allocation and amount of data transmitted between server and client when compared to prior solutions. Performance tests of the implementation has also shown the proposed wavelet representation to have a good computational performance.
Liu, Jheng-Sin. "Advanced Energy-Efficient Devices for Ultra-Low Voltage System: Materials-to-Circuits". Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/81858.
Testo completoPh. D.
Liang, Weifa, e wliang@cs anu edu au. "Designing Efficient Parallel Algorithms for Graph Problems". The Australian National University. Department of Computer Science, 1997. http://thesis.anu.edu.au./public/adt-ANU20010829.114536.
Testo completoChatterjee, Subho. "A design methodology for robust, energy-efficient, application-aware memory systems". Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/50146.
Testo completoLeyva, Mayorga Israel. "On reliable and energy efficient massive wireless communications: the road to 5G". Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/115484.
Testo completoLa cinquena generació de xarxes mòbils (5G) es troba molt a la vora. S'espera que proveïsca de beneficis extraordinaris a la població i que resolga la majoria dels problemes de les xarxes 4G actuals. L'èxit de 5G, per a la qual ja ha sigut completada la primera fase del qual d'estandardització, depén de tres pilars: comunicacions tipus-màquina massives, banda ampla mòbil millorada, i comunicacions ultra fiables i de baixa latència (mMTC, eMBB i URLLC, respectivament, per les seues sigles en anglés). En aquesta tesi ens enfoquem en el primer pilar de 5G, mMTC, però també proveïm una solució per a aconseguir eMBB en escenaris de distribució massiva de continguts. Específicament, les principals contribucions són en les àrees de: 1) suport eficient de mMTC en xarxes cel·lulars; 2) accés aleatori per al report d'esdeveniments en xarxes sense fils de sensors (WSNs); i 3) cooperació per a la distribució massiva de continguts en xarxes cel·lulars. En l'apartat de mMTC en xarxes cel·lulars, aquesta tesi realitza una anàlisi profunda de l'acompliment del procediment d'accés aleatori, que és la forma mitjançant la qual els dispositius mòbils accedeixen a la xarxa. Aquestes anàlisis van ser inicialment dutes per mitjà de simulacions i, posteriorment, per mitjà d'un model analític. Els models van ser desenvolupats específicament per a aquest propòsit i inclouen un dels esquemes de control d'accés més prometedors: el access class barring (ACB). El nostre model és un dels més precisos que es poden trobar i l'únic que incorpora l'esquema d'ACB. Els resultats obtinguts per mitjà d'aquest model i per simulació són clars: els accessos altament sincronitzats que ocorren en aplicacions de mMTC poden causar congestió severa en el canal d'accés. D'altra banda, també són clars en què aquesta congestió es pot previndre amb una adequada configuració de l'ACB. No obstant això, els paràmetres de configuració de l'ACB han de ser contínuament adaptats a la intensitat d'accessos per a poder obtindre unes prestacions òptimes. En la tesi es proposa una solució pràctica a aquest problema en la forma d'un esquema de configuració automàtica per a l'ACB; l'anomenem ACBC. Els resultats mostren que el nostre esquema pot aconseguir un acompliment molt proper a l'òptim sense importar la intensitat dels accessos. Així mateix, pot ser directament implementat en xarxes cel·lulars per a suportar el trànsit mMTC, ja que ha sigut dissenyat tenint en compte els estàndards del 3GPP. A més de les anàlisis descrites anteriorment per a xarxes cel·lulars, es realitza una anàlisi general per a aplicacions de comptadors intel·ligents. És a dir, estudiem un escenari de mMTC des de la perspectiva de les WSNs. Específicament, desenvolupem un model híbrid per a l'anàlisi de prestacions i l'optimització de protocols de WSNs d'accés aleatori i basats en clúster. Els resultats mostren la utilitat d'escoltar el mitjà sense fil per a minimitzar el nombre de transmissions i també de modificar les probabilitats de transmissió després d'una col·lisió. Pel que fa a eMBB, ens enfoquem en un escenari de distribució massiva de continguts, en el qual un mateix contingut és enviat de forma simultània a un gran nombre d'usuaris mòbils. Aquest escenari és problemàtic, ja que les estacions base de la xarxa cel·lular no compten amb mecanismes eficients de multicast o broadcast. Per tant, la solució que s'adopta comunament és la de replicar el contingut per a cadascun dels usuaris que ho sol·liciten; és clar que això és altament ineficient. Per a resoldre aquest problema, proposem l'ús d'esquemes de network coding i d'arquitectures cooperatives anomenades núvols mòbils. En concret, desenvolupem un protocol per a realitzar la distribució massiva de continguts de forma eficient, juntament amb un model analític per a la seua optimització. Els resultats demostren que el model proposat és simple i precís
The 5th generation (5G) of mobile networks is just around the corner. It is expected to bring extraordinary benefits to the population and to solve the majority of the problems of current 4th generation (4G) systems. The success of 5G, whose first phase of standardization has concluded, relies in three pillars that correspond to its main use cases: massive machine-type communication (mMTC), enhanced mobile broadband (eMBB), and ultra-reliable low latency communication (URLLC). This thesis mainly focuses on the first pillar of 5G: mMTC, but also provides a solution for the eMBB in massive content delivery scenarios. Specifically, its main contributions are in the areas of: 1) efficient support of mMTC in cellular networks; 2) random access (RA) event-reporting in wireless sensor networks (WSNs); and 3) cooperative massive content delivery in cellular networks. Regarding mMTC in cellular networks, this thesis provides a thorough performance analysis of the RA procedure (RAP), used by the mobile devices to switch from idle to connected mode. These analyses were first conducted by simulation and then by an analytical model; both of these were developed with this specific purpose and include one of the most promising access control schemes: the access class barring (ACB). To the best of our knowledge, this is one of the most accurate analytical models reported in the literature and the only one that incorporates the ACB scheme. Our results clearly show that the highly-synchronized accesses that occur in mMTC applications can lead to severe congestion. On the other hand, it is also clear that congestion can be prevented with an adequate configuration of the ACB scheme. However, the configuration parameters of the ACB scheme must be continuously adapted to the intensity of access attempts if an optimal performance is to be obtained. We developed a practical solution to this problem in the form of a scheme to automatically configure the ACB; we call it access class barring configuration (ACBC) scheme. The results show that our ACBC scheme leads to a near-optimal performance regardless of the intensity of access attempts. Furthermore, it can be directly implemented in 3rd Generation Partnership Project (3GPP) cellular systems to efficiently handle mMTC because it has been designed to comply with the 3GPP standards. In addition to the analyses described above for cellular networks, a general analysis for smart metering applications is performed. That is, we study an mMTC scenario from the perspective of event detection and reporting WSNs. Specifically, we provide a hybrid model for the performance analysis and optimization of cluster-based RA WSN protocols. Results showcase the utility of overhearing to minimize the number of packet transmissions, but also of the adaptation of transmission parameters after a collision occurs. Building on this, we are able to provide some guidelines that can drastically increase the performance of a wide range of RA protocols and systems in event reporting applications. Regarding eMBB, we focus on a massive content delivery scenario in which the exact same content is transmitted to a large number of mobile users simultaneously. Such a scenario may arise, for example, with video streaming services that offer a particularly popular content. This is a problematic scenario because cellular base stations have no efficient multicast or broadcast mechanisms. Hence, the traditional solution is to replicate the content for each requesting user, which is highly inefficient. To solve this problem, we propose the use of network coding (NC) schemes in combination with cooperative architectures named mobile clouds (MCs). Specifically, we develop a protocol for efficient massive content delivery, along with the analytical model for its optimization. Results show the proposed model is simple and accurate, and the protocol can lead to energy savings of up to 37 percent when compared to the traditional approach.
Leyva Mayorga, I. (2018). On reliable and energy efficient massive wireless communications: the road to 5G [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/115484
TESIS
Capitoli di libri sul tema "Random access efficiency"
Luo, Wei, e Anthony Ephremides. "Trading-off Capture Against Packet Separation for Throughput and Energy Efficiency in Random Access Systems". In Multiaccess, Mobility and Teletraffic in Wireless Communications: Volume 4, 117–26. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4757-5920-4_13.
Testo completoAlisha e P. G. Poonacha. "A Random Access Registration and Scheduling Based MAC Protocol with Directional Antennas for Improving Energy Efficiency". In Proceedings of 3rd International Conference on Advanced Computing, Networking and Informatics, 133–42. New Delhi: Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2529-4_14.
Testo completoKarouit, Abdelillah. "Efficient Incentive Scheme forWireless Random Channel Access with Selfish Users". In Lecture Notes in Electrical Engineering, 27–38. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-287-990-5_3.
Testo completoSeo, Hyun-Hwa, Byung-Han Ryu, Choong-Ho Cho e Hyong-Woo Lee. "Traffic Characteristics Based Performance Analysis Model for Efficient Random Access in OFDMA-PHY System". In Lecture Notes in Computer Science, 213–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11424505_21.
Testo completoWeis, Christian, Christina Gimmler-Dumont, Matthias Jung e Norbert Wehn. "Design of Efficient, Dependable SoCs Based on a Cross-Layer-Reliability Approach with Emphasis on Wireless Communication as Application and DRAM Memories". In Dependable Embedded Systems, 435–55. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52017-5_18.
Testo completoAgrawal, Tarun, e Vivek Srivastava. "Design of Energy-Efficient Random Access Memory Circuit Using Low-Voltage CMOS and High-Speed Transreceiver Logic-I I/O Standard on 28 nm FPGA". In System and Architecture, 95–106. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8533-8_10.
Testo completoZhou, Zhong, Jun-Hong Cui, Shengli Zhou e Shuguang Cui. "Energy Efficient Communication with Random Node Cooperation". In Cooperative Communications for Improved Wireless Network Transmission, 280–300. IGI Global, 2010. http://dx.doi.org/10.4018/978-1-60566-665-5.ch010.
Testo completoKhang, Adam Wong Yoon, Mohamed Elshaikh Elobaid, Arnidza Ramli, Nadiatulhuda Zulkifli e Sevia Mahdaliza Idrus. "Routing Optimization for Integrated Optical and Mobile Ad hoc Networks". In Enabling Technologies and Architectures for Next-Generation Networking Capabilities, 90–104. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-6023-4.ch004.
Testo completoVassaki, Stavroula, George Pitsiladis, Stavros E. Sagkriotis e Athanasios D. Panagopoulos. "Future M2M Communication Networks". In Advances in Wireless Technologies and Telecommunication, 149–78. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-8732-5.ch007.
Testo completoAli, Ismail, Sandro Moiron, Martin Fleury e Mohammed Ghanbari. "Intra-Refresh and Data-Partitioning for Video Streaming over IEEE 802.11e". In Advances in Wireless Technologies and Telecommunication, 199–228. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-4715-2.ch012.
Testo completoAtti di convegni sul tema "Random access efficiency"
Chen, Shiyang, Xiaoying Gan e He Li. "Energy efficiency driven random access in WLAN system". In 2012 International Conference on Wireless Communications & Signal Processing (WCSP 2012). IEEE, 2012. http://dx.doi.org/10.1109/wcsp.2012.6542886.
Testo completoGao, Junyuan, Yongpeng Wu e Wenjun Zhang. "Energy-efficiency of Massive Random Access with Individual Codebook". In GLOBECOM 2020 - 2020 IEEE Global Communications Conference. IEEE, 2020. http://dx.doi.org/10.1109/globecom42002.2020.9348157.
Testo completoBecker, Neal, Mustafa Eroz, Stan Kay e Lin-nan Lee. "Asynchronous Scrambled Coded Multiple Access (A-SCMA) - A New High Efficiency Random Access Method". In 2016 IEEE 84th Vehicular Technology Conference (VTC-Fall). IEEE, 2016. http://dx.doi.org/10.1109/vtcfall.2016.7880912.
Testo completoLeung, R., e D. Taubman. "Impact of motion on the random access efficiency of scalable compressed video". In rnational Conference on Image Processing. IEEE, 2005. http://dx.doi.org/10.1109/icip.2005.1530355.
Testo completoGursu, H. Murat, Berkay Kopru, Sinem Coleri Ergen e Wolfgang Kellerer. "Multiplicity Estimating Random Access Protocol for Resource Efficiency in Contention based NOMA". In 2018 IEEE 29th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC). IEEE, 2018. http://dx.doi.org/10.1109/pimrc.2018.8580754.
Testo completoZucchetto, Daniel, Chiara Pielli, Andrea Zanella e Michele Zorzi. "A Random Access Scheme to Balance Energy Efficiency and Accuracy in Monitoring Applications". In 2018 Information Theory and Applications Workshop (ITA). IEEE, 2018. http://dx.doi.org/10.1109/ita.2018.8503122.
Testo completoTsai, Yuh-Ren, Yao-Win Hong, Yan-Yu Liao e Kai-Jie Yang. "The Efficiency and Delay of Distributed Source Coding in Random Access Sensor Networks". In 2007 IEEE Wireless Communications and Networking Conference. IEEE, 2007. http://dx.doi.org/10.1109/wcnc.2007.150.
Testo completoKab Seok Ko, Bang Chul Jung e Dan Keun Sung. "On the energy efficiency of wireless random access networks with multi-packet reception". In 2013 IEEE 24th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC). IEEE, 2013. http://dx.doi.org/10.1109/pimrc.2013.6666410.
Testo completoPereira, Fernando H. S., Carlos A. Astudillo, Tiago P. C. De Andrade e Nelson L. S. Da Fonseca. "PRACH Power Control Mechanism for Improving Random-Access Energy Efficiency in Long Term Evolution". In 2018 IEEE 10th Latin-American Conference on Communications (LATINCOM). IEEE, 2018. http://dx.doi.org/10.1109/latincom.2018.8613252.
Testo completoChoi, Jinho. "On the energy efficiency and total bandwidth in channel-aware random access for WSNs". In 2015 IEEE International Conference on Signal Processing for Communications (ICC). IEEE, 2015. http://dx.doi.org/10.1109/icc.2015.7249058.
Testo completoRapporti di organizzazioni sul tema "Random access efficiency"
Zeger, Linda, e Amanda Peters. Efficient Methods for Broadcasting Multi-Slot Messages with Random Access with Capture. Fort Belvoir, VA: Defense Technical Information Center, aprile 2011. http://dx.doi.org/10.21236/ada570576.
Testo completoPeters, Amanda, e Linda Zeger. Efficient Resource Allocation for Broadcasting Multi-Slot Messages With Random Access with Capture. Fort Belvoir, VA: Defense Technical Information Center, marzo 2011. http://dx.doi.org/10.21236/ada541058.
Testo completo