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Blockchains play a crucial role in the digitalization of future supply chains (SCs). In this study, we analyzed the major influences that blockchain-based digital business strategies may play in SC operations. We conducted 18 interviews with international experts from different sectors and analyzed the collected data using the grounded theory approach, identifying four major categories. A set of three matrices is presented to address those elements that may support digital transition procedures in SCs: (1) value of trust and automation, (2) transformative role for operations, and (3) digital business strategy identification. As an additional result, a reference framework was identified for the evaluation and detection of those aspects to be taken into consideration during blockchain adoption in SCs. For use as a guide, this result comprises 22 recommendations and was framed in four progressive steps as follows: (1) identify, (2) assess, (3) design, and (4) assure.
Fabio Della Valle; Miquel Oliver. A Guidance for Blockchain-Based Digital Transition in Supply Chains. Applied Sciences 2021, 11, 6523 .
AMA StyleFabio Della Valle, Miquel Oliver. A Guidance for Blockchain-Based Digital Transition in Supply Chains. Applied Sciences. 2021; 11 (14):6523.
Chicago/Turabian StyleFabio Della Valle; Miquel Oliver. 2021. "A Guidance for Blockchain-Based Digital Transition in Supply Chains." Applied Sciences 11, no. 14: 6523.
Supply chain management is considered one of the main sectors of development for blockchain technology. This study provides solid contributions to understanding blockchain innovation and presents some main features and guidelines for how to boost blockchain implementation in industry. As explorative research, this paper presents a grounded theory analysis based on 18 expert interviews. The pool of interviewees is composed of academics and business and institutional representatives with relevant technological knowledge on blockchain and innovation management. Renowned worldwide experts provided us with powerful input to run this analysis and with a general overview of the current situation. Blockchain development of course impacts supply chains, but currently, the analysis shows that it does not seem to be a disruptive technology. In accordance with C.M. Christensen, blockchain presents all the features to be a sustaining innovation rather than disruptive. For this reason, as outcomes, we present five enablers that can foster prompt adoption in industry.
Fabio Della Valle; Miquel Oliver. Blockchain Enablers for Supply Chains: How to Boost Implementation in Industry. IEEE Access 2020, 8, 209699 -209716.
AMA StyleFabio Della Valle, Miquel Oliver. Blockchain Enablers for Supply Chains: How to Boost Implementation in Industry. IEEE Access. 2020; 8 (99):209699-209716.
Chicago/Turabian StyleFabio Della Valle; Miquel Oliver. 2020. "Blockchain Enablers for Supply Chains: How to Boost Implementation in Industry." IEEE Access 8, no. 99: 209699-209716.
Virtual Network Functions allow the effective separation between hardware and network functionality, a strong paradigm shift from previously tightly integrated monolithic, vendor, and technology dependent deployments. In this virtualized paradigm, all aspects of network operations can be made to deploy on demand, dynamically scale, as well as be shared and interworked in ways that mirror behaviors of general cloud computing. To date, although seeing rising demand, distributed ledger technology remains largely incompatible in such elastic deployments, by its nature as functioning as an immutable record store. This work focuses on the structural incompatibility of current blockchain designs and proposes a novel, temporal blockchain design built atop federated byzantine agreement, which has the ability to dynamically scale and be packaged as a Virtual Network Function (VNF) for the 5G Core.
Steven Platt; Luis Sanabria-Russo; Miquel Oliver. CoNTe: A Core Network Temporal Blockchain for 5G. Sensors 2020, 20, 5281 .
AMA StyleSteven Platt, Luis Sanabria-Russo, Miquel Oliver. CoNTe: A Core Network Temporal Blockchain for 5G. Sensors. 2020; 20 (18):5281.
Chicago/Turabian StyleSteven Platt; Luis Sanabria-Russo; Miquel Oliver. 2020. "CoNTe: A Core Network Temporal Blockchain for 5G." Sensors 20, no. 18: 5281.
This work focuses on internal logistics (IL), which is defined as the flows of materials inside the same business or the same plant. We centre on the IL activities of a car-assembling company. The main objective is to propose simulation models’ concepts that evaluate assembling lines under the IL point of view. We present a real case study based on SEAT S.A., a company in the Volkswagen group. We developed a Discrete-Event Simulation model through the Plant Simulation software. The company set the main Key Performance Indicators, which are related to the logistics flows’ performance (LFP) and an assembly lines’ aisles utilisation. The results expose which aisles are overused, the disturbs among the logistics flows, and the LFP, regarding the total of backorders, the trips duration, and the routes’ length in terms of distances and time. Moreover, we offer aset of best practices for further applications in that field.
Marcelus Fabri; Helena Ramalhinho; Miquel Oliver; Juan Carlos Muñoz. Internal logistics flow simulation: A case study in automotive industry. Journal of Simulation 2020, 1 -13.
AMA StyleMarcelus Fabri, Helena Ramalhinho, Miquel Oliver, Juan Carlos Muñoz. Internal logistics flow simulation: A case study in automotive industry. Journal of Simulation. 2020; ():1-13.
Chicago/Turabian StyleMarcelus Fabri; Helena Ramalhinho; Miquel Oliver; Juan Carlos Muñoz. 2020. "Internal logistics flow simulation: A case study in automotive industry." Journal of Simulation , no. : 1-13.
The way citizens interact with cities affects overall life quality. Their participation in social decisions is of paramount importance for helping on public decisions that affect governance, regulation and education. This interaction has the potential of being boosted within the scope of smart and digital cities, especially by recent advances in blockchain technology. This work introduces insights about how smart cities’ concepts and innovative technologies can help society to face daily challenges for improving citizens’ awareness. Digital technologies are able to drive social and economic development by employing Information and Communication Technology (ICT) to promote innovation. In this context, e-governance, in conjunction with disruptive concepts such as blockchain, is showing up as a fundamental tool for a decentralized democracy. This study reviews, discusses, raises open points and presents suggestions towards an efficient, transparent and sustainable use of technology, applied to future cities.
Thays A. Oliveira; Miquel Oliver; Helena Ramalhinho. Challenges for Connecting Citizens and Smart Cities: ICT, E-Governance and Blockchain. Sustainability 2020, 12, 2926 .
AMA StyleThays A. Oliveira, Miquel Oliver, Helena Ramalhinho. Challenges for Connecting Citizens and Smart Cities: ICT, E-Governance and Blockchain. Sustainability. 2020; 12 (7):2926.
Chicago/Turabian StyleThays A. Oliveira; Miquel Oliver; Helena Ramalhinho. 2020. "Challenges for Connecting Citizens and Smart Cities: ICT, E-Governance and Blockchain." Sustainability 12, no. 7: 2926.
Cities are constantly transforming and, consequently, attracting efforts from researchers and opportunities to the industry. New transportation systems are being built in order to meet sustainability and efficiency criteria, as well as being adapted to the current possibilities. Moreover, citizens are becoming aware about the power and possibilities provided by the current generation of autonomous devices. In this sense, this paper presents and discusses state-of-the-art transportation technologies and systems, highlighting the advances that the concepts of Internet of Things and Value are providing. Decentralized technologies, such as blockchain, are been extensively investigated by the industry, however, its widespread adoption in cities is still desirable. Aligned with operations research opportunities, this paper identifies different points in which cities’ services could move to. This also study comments about different combinatorial optimization problems that might be useful and important for an efficient evolution of our cities. By considering different perspectives, didactic examples are presented with a main focus on motivating decision makers to balance citizens, investors and industry goals and wishes.
Thays A. Oliveira; Yuri B. Gabrich; Helena Ramalhinho; Miquel Oliver; Miri W. Cohen; Luiz S. Ochi; Serigne Gueye; Fábio Protti; Alysson A. Pinto; Diógenes V. M. Ferreira; Igor M. Coelho; Vitor N. Coelho. Mobility, Citizens, Innovation and Technology in Digital and Smart Cities. Future Internet 2020, 12, 22 .
AMA StyleThays A. Oliveira, Yuri B. Gabrich, Helena Ramalhinho, Miquel Oliver, Miri W. Cohen, Luiz S. Ochi, Serigne Gueye, Fábio Protti, Alysson A. Pinto, Diógenes V. M. Ferreira, Igor M. Coelho, Vitor N. Coelho. Mobility, Citizens, Innovation and Technology in Digital and Smart Cities. Future Internet. 2020; 12 (2):22.
Chicago/Turabian StyleThays A. Oliveira; Yuri B. Gabrich; Helena Ramalhinho; Miquel Oliver; Miri W. Cohen; Luiz S. Ochi; Serigne Gueye; Fábio Protti; Alysson A. Pinto; Diógenes V. M. Ferreira; Igor M. Coelho; Vitor N. Coelho. 2020. "Mobility, Citizens, Innovation and Technology in Digital and Smart Cities." Future Internet 12, no. 2: 22.
While direct allocation of spectrum and evolved medium access protocols provide a base for ubiquitous wireless connectivity, the existing TCP/IP and OSI models were designed for wired networks and do not address open interconnection of air interfaces. Without an interworking model for the air interface, existing network designs continue to tie wireless medium access to that of the backhaul provider for ownership of access and identity trust, resulting in limitations on functionality and coverage.In this paper, we propose a novel solution to access ownership and identity trust by extending the TCP network standard, under a new model we propose, named TCP-Air which integrates distributed ledger technologies directly at the air interface. Further, we present two use cases of the TCP-Air model, demonstrating applications not feasible under existing permissioned-access network designs.
Steven Platt; Miquel Oliver. A Distributed Ledger-Enabled Interworking Model for the Wireless Air Interface. 2019 IEEE 5th World Forum on Internet of Things (WF-IoT) 2019, 402 -407.
AMA StyleSteven Platt, Miquel Oliver. A Distributed Ledger-Enabled Interworking Model for the Wireless Air Interface. 2019 IEEE 5th World Forum on Internet of Things (WF-IoT). 2019; ():402-407.
Chicago/Turabian StyleSteven Platt; Miquel Oliver. 2019. "A Distributed Ledger-Enabled Interworking Model for the Wireless Air Interface." 2019 IEEE 5th World Forum on Internet of Things (WF-IoT) , no. : 402-407.
Smart cities have been receiving great focus during the recent years. One important topic that it covers is the use of technologies to help the connection between smart cities and citizens. These links can influence different cities services and governance such as transport, politics, education, public transparency, citizens' rights, among others. Those services work much better when they are connected, interconnected, participative and transparent. Any kind of environment requires these improvements, both in underdeveloped and developed countries. In this sense, for this cultural and evolution process, it is important to understand how the citizens are responding to these technological stimulus. This work describes and investigates how these themes are treated in the literature, using bibliometric method and data from SCOPUS, Web of Science (WoS), IEEEXplore. In this study, discussions will be focused on the technological area, however, with efforts in reaching distinct strategical areas that are nowadays working side by side on it.
Thays Aparecida de Oliveira; Alexandre C. Barbosa; Helena Ramalhinho; Miquel Oliver. Citizens and Information and Communication Technologies. 2018 International Joint Conference on Neural Networks (IJCNN) 2018, 1 -7.
AMA StyleThays Aparecida de Oliveira, Alexandre C. Barbosa, Helena Ramalhinho, Miquel Oliver. Citizens and Information and Communication Technologies. 2018 International Joint Conference on Neural Networks (IJCNN). 2018; ():1-7.
Chicago/Turabian StyleThays Aparecida de Oliveira; Alexandre C. Barbosa; Helena Ramalhinho; Miquel Oliver. 2018. "Citizens and Information and Communication Technologies." 2018 International Joint Conference on Neural Networks (IJCNN) , no. : 1-7.
Toni Adame; Albert Bel; Anna Carreras; Joan Melià-Seguí; Miquel Oliver; Rafael Pous. CUIDATS: An RFID–WSN hybrid monitoring system for smart health care environments. Future Generation Computer Systems 2018, 78, 602 -615.
AMA StyleToni Adame, Albert Bel, Anna Carreras, Joan Melià-Seguí, Miquel Oliver, Rafael Pous. CUIDATS: An RFID–WSN hybrid monitoring system for smart health care environments. Future Generation Computer Systems. 2018; 78 ():602-615.
Chicago/Turabian StyleToni Adame; Albert Bel; Anna Carreras; Joan Melià-Seguí; Miquel Oliver; Rafael Pous. 2018. "CUIDATS: An RFID–WSN hybrid monitoring system for smart health care environments." Future Generation Computer Systems 78, no. : 602-615.
Maria-Lluisa Marsal-Llacuna; Miquel Oliver. The standards revolution: Who will first put this new kid on the blockchain? 2017 ITU Kaleidoscope: Challenges for a Data-Driven Society (ITU K) 2017, 1 .
AMA StyleMaria-Lluisa Marsal-Llacuna, Miquel Oliver. The standards revolution: Who will first put this new kid on the blockchain? 2017 ITU Kaleidoscope: Challenges for a Data-Driven Society (ITU K). 2017; ():1.
Chicago/Turabian StyleMaria-Lluisa Marsal-Llacuna; Miquel Oliver. 2017. "The standards revolution: Who will first put this new kid on the blockchain?" 2017 ITU Kaleidoscope: Challenges for a Data-Driven Society (ITU K) , no. : 1.
Trang Cao Minh; Boris Bellata; Simon Oechsner; Ruizhi Liao; Miquel Oliver. Managing HeterogeneousWSNs in Smart Cities: Challenges and Requirements. EAI Endorsed Transactions on Internet of Things 2016, 2, 151710 .
AMA StyleTrang Cao Minh, Boris Bellata, Simon Oechsner, Ruizhi Liao, Miquel Oliver. Managing HeterogeneousWSNs in Smart Cities: Challenges and Requirements. EAI Endorsed Transactions on Internet of Things. 2016; 2 (5):151710.
Chicago/Turabian StyleTrang Cao Minh; Boris Bellata; Simon Oechsner; Ruizhi Liao; Miquel Oliver. 2016. "Managing HeterogeneousWSNs in Smart Cities: Challenges and Requirements." EAI Endorsed Transactions on Internet of Things 2, no. 5: 151710.
El fenómeno MOOC, surgido en los Estados Unidos, está despertando un gran interés tanto entre académicos como entre responsables políticos en Europa. Aunque complejo y cambiante, este fenómeno ha creado expectativas tanto a nivel pedagógico como estratégico o económico en el ámbito de la educación superior. En enero de 2013, la Generalitat de Catalunya impulsó un proyecto singular con la finalidad de dinamizar y proyectar la docencia del sistema universitario a través de una convocatoria abierta para la realización de MOOCs. En este artículo analizamos si sus resultados proporcionan evidencias suficientes para afirmar que este tipo de formación en Cataluña representa una innovación disruptiva. Para ello se ha establecido el marco teórico y analítico, principalmente basado en los trabajos de Christensen sobre innovación disruptiva, y se ha realizado un diseño metodológico, eminentemente de carácter exploratorio y descriptivo. El estudio define los indicadores básicos para cada una de las tres dimensiones bajo estudio (existencia de un nuevo mercado, grado de adaptación del curso y modelo de costes asociados) y recaba información de los 14 cursos seleccionados en la primera convocatoria. Los resultados de dicha convocatoria, con tan solo un 10.1% de proyectos financiados, permiten afirmar, por un lado, que los participantes de este tipo de cursos tienen un perfil distinto al de los existentes en la oferta universitaria actual y, por otro, que la mayoría de cursos presentan claros síntomas de innovación disruptiva. Los costes de realización de los MOOCs se comparan con los modelos de costes de formación presencial y en línea, siendo del mismo orden de magnitud si no se ponderan por estudiante o participante. En definitiva, puede decirse que existen claros indicios de disrupción en innovación aunque es necesario perfilar el marco analítico y disponer de más datos para avanzar en la comprensión y alcance del fenómeno.
Teresa Sancho Vinuesa; Miquel Oliver; Mercè Gisbert. MOOCs en Cataluña: un instrumento para la innovación en educación superior. Educación XX1 2015, 18, 1 .
AMA StyleTeresa Sancho Vinuesa, Miquel Oliver, Mercè Gisbert. MOOCs en Cataluña: un instrumento para la innovación en educación superior. Educación XX1. 2015; 18 (2):1.
Chicago/Turabian StyleTeresa Sancho Vinuesa; Miquel Oliver; Mercè Gisbert. 2015. "MOOCs en Cataluña: un instrumento para la innovación en educación superior." Educación XX1 18, no. 2: 1.
Theoretically, full-duplex (FD) transmissions hold the promise of doubling the channel capacity. However, this capacity increase can not directly translate to the useful throughput at the medium access control (MAC) layer due to overheads. In this letter, we propose an enhanced full-duplex MAC (FD+) for improving the performance of wireless networks. We also present a simple analytic model for investigating what gains can be achieved at the MAC layer. The simple model for FD transmissions can accurately capture the new sub-scenarios of two-node simultaneous transmissions that are traditionally handled as collisions by IEEE 802.11 distributed coordination function (DCF). The performance of FD+ is compared with DCF, a plain FD (FD-Plain) scheme and an FD MAC (FD-MAC) scheme from the literature. The analytic and simulation results show that FD+ is able to provide an average factor of 2.3 and 1.3 throughput increase against FD-Plain and FD-MAC, respectively.
Ruizhi Liao; Boris Bellalta; Miquel Oliver. Modelling and Enhancing Full-Duplex MAC for Single-Hop 802.11 Wireless Networks. IEEE Wireless Communications Letters 2015, 4, 349 -352.
AMA StyleRuizhi Liao, Boris Bellalta, Miquel Oliver. Modelling and Enhancing Full-Duplex MAC for Single-Hop 802.11 Wireless Networks. IEEE Wireless Communications Letters. 2015; 4 (4):349-352.
Chicago/Turabian StyleRuizhi Liao; Boris Bellalta; Miquel Oliver. 2015. "Modelling and Enhancing Full-Duplex MAC for Single-Hop 802.11 Wireless Networks." IEEE Wireless Communications Letters 4, no. 4: 349-352.
Manuel Palacin; Alex Bikfalvi; Miquel Oliver. Mercury: Revealing Hidden Interconnections Between Access ISPs and Content Providers. Transactions on Petri Nets and Other Models of Concurrency XV 2014, 147 -159.
AMA StyleManuel Palacin, Alex Bikfalvi, Miquel Oliver. Mercury: Revealing Hidden Interconnections Between Access ISPs and Content Providers. Transactions on Petri Nets and Other Models of Concurrency XV. 2014; ():147-159.
Chicago/Turabian StyleManuel Palacin; Alex Bikfalvi; Miquel Oliver. 2014. "Mercury: Revealing Hidden Interconnections Between Access ISPs and Content Providers." Transactions on Petri Nets and Other Models of Concurrency XV , no. : 147-159.
As wireless devices boom and bandwidth-hungry applications (e.g., video and cloud uploading) get popular, today's wireless local area networks (WLANs) become not only crowded but also stressed at throughput. Multiuser multiple-input-multiple-output (MU-MIMO), an advanced form of MIMO, has gained attention due to its huge potential in improving the performance of WLANs. This paper surveys random access-based medium access control (MAC) protocols for MU-MIMO-enabled WLANs. It first provides background information about the evolution and the fundamental MAC schemes of IEEE 802.11 Standards and Amendments, and then identifies the key requirements of designing MU-MIMO MAC protocols for WLANs. After this, the most representative MU-MIMO MAC proposals in the literature are overviewed by benchmarking their MAC procedures and examining the key components, such as the channel state information acquisition, decoding/precoding, and scheduling schemes. Classifications and discussions on important findings of the surveyed MAC protocols are provided, based on which, the research challenges for designing effective MU-MIMO MAC protocols, as well as the envisaged MAC's role in the future heterogeneous networks, are highlighted.
Ruizhi Liao; Boris Bellalta; Miquel Oliver; Zhisheng Niu. MU-MIMO MAC Protocols for Wireless Local Area Networks: A Survey. IEEE Communications Surveys & Tutorials 2014, 18, 162 -183.
AMA StyleRuizhi Liao, Boris Bellalta, Miquel Oliver, Zhisheng Niu. MU-MIMO MAC Protocols for Wireless Local Area Networks: A Survey. IEEE Communications Surveys & Tutorials. 2014; 18 (1):162-183.
Chicago/Turabian StyleRuizhi Liao; Boris Bellalta; Miquel Oliver; Zhisheng Niu. 2014. "MU-MIMO MAC Protocols for Wireless Local Area Networks: A Survey." IEEE Communications Surveys & Tutorials 18, no. 1: 162-183.
M2M communications are positioned to be one of the fastest growing technology segments in the next decade. Sensor and actuator networks connect communication machines and devices so that they automatically transmit information, serving the growing demand for environmental data acquisition. The IEEE 802.11ah Task Group is working on a new standard to address the particular requirements of M2M networks: a large number of power-constrained stations; a long transmission range; small and infrequent data messages; low data rates; and a non-critical delay. This article explores the key features of this new standard, especially those related to the reduction of energy consumption in the medium access control layer. Given these requirements, a performance assessment of IEEE 802.11ah in four common M2M scenarios, i.e. agriculture monitoring, smart metering, industrial automation, and animal monitoring, is presented.
Toni Adame; Albert Bel; Boris Bellalta; Jaume Barcelo; Miquel Oliver. IEEE 802.11AH: the WiFi approach for M2M communications. IEEE Wireless Communications 2014, 21, 144 -152.
AMA StyleToni Adame, Albert Bel, Boris Bellalta, Jaume Barcelo, Miquel Oliver. IEEE 802.11AH: the WiFi approach for M2M communications. IEEE Wireless Communications. 2014; 21 (6):144-152.
Chicago/Turabian StyleToni Adame; Albert Bel; Boris Bellalta; Jaume Barcelo; Miquel Oliver. 2014. "IEEE 802.11AH: the WiFi approach for M2M communications." IEEE Wireless Communications 21, no. 6: 144-152.
Due to the dominance of the downlink traffic in Wireless Local Area Networks (WLANs), a large number of previous research efforts have been put to enhance the transmission from the Access Point (AP) to stations (STAs). The downlink Multi-User Multiple-Input Multiple-Output (MU-MIMO) technique, supported by the latest IEEE amendment-802.11ac, is considered as one of the key enhancements leading WLANs to the Gigabit era. However, as cloud uploading services, Peer-to-Peer (P2P) and telepresence applications get popular, the need for a higher uplink capacity becomes inevitable. In this paper, a unified down/up-link Medium Access Control (MAC) protocol called Uni-MUMAC is proposed to enhance the performance of IEEE 802.11ac WLANs by exploring the multi-user spatial multiplexing technique. Specifically, in the downlink, we implement an IEEE 802.11ac-compliant MU-MIMO transmission scheme to allow the AP to simultaneously send frames to a group of STAs. In the uplink, we extend the traditional one round channel access contention to two rounds, which coordinate multiple STAs to transmit frames to the AP simultaneously. 2-nd round Contention Window (CW2nd), a parameter that makes the length of the 2-nd contention round elastic according to the traffic condition, is introduced. Uni-MUMAC is evaluated through simulations in saturated and non-saturated conditions when both downlink and uplink traffic are present in the system. We also propose an analytic saturation model to validate the simulation results. By properly setting CW2nd and other parameters, Uni-MUMAC is compared to a prominent multi-user transmission scheme in the literature. The results exhibit that Uni-MUMAC not only performs well in the downlink-dominant scenario, but it is also able to balance both the downlink and uplink throughput in the emerging uplink bandwidth-hungry scenario.Comment: 27 pages, 16 figure
Ruizhi Liao; Boris Bellalta; Trang Minh Cao; Jaume Barcelo; Miquel Oliver. Uni-MUMAC: a unified down/up-link MU-MIMO MAC protocol for IEEE 802.11ac WLANs. Wireless Networks 2014, 21, 1457 -1472.
AMA StyleRuizhi Liao, Boris Bellalta, Trang Minh Cao, Jaume Barcelo, Miquel Oliver. Uni-MUMAC: a unified down/up-link MU-MIMO MAC protocol for IEEE 802.11ac WLANs. Wireless Networks. 2014; 21 (5):1457-1472.
Chicago/Turabian StyleRuizhi Liao; Boris Bellalta; Trang Minh Cao; Jaume Barcelo; Miquel Oliver. 2014. "Uni-MUMAC: a unified down/up-link MU-MIMO MAC protocol for IEEE 802.11ac WLANs." Wireless Networks 21, no. 5: 1457-1472.
Trang Minh Cao; Boris Bellata; Miquel Oliver. Design of a generic management system for wireless sensor networks. Ad Hoc Networks 2014, 20, 16 -35.
AMA StyleTrang Minh Cao, Boris Bellata, Miquel Oliver. Design of a generic management system for wireless sensor networks. Ad Hoc Networks. 2014; 20 ():16-35.
Chicago/Turabian StyleTrang Minh Cao; Boris Bellata; Miquel Oliver. 2014. "Design of a generic management system for wireless sensor networks." Ad Hoc Networks 20, no. : 16-35.
As wireless devices boom, and bandwidth-hungry applications (e.g., video and cloud uploading) get popular, today's Wireless Local Area Networks (WLANs) become not only crowded but also stressed at throughput. Multi-user Multiple-Input and Multiple-Output (MU-MIMO), an advanced form of MIMO, has gained attention due to its huge potential in improving the performance of WLANs. This paper surveys random access based MAC protocols for MU-MIMO enabled WLANs. It first provides background information about the evolution and the fundamental MAC schemes of IEEE 802.11 Standards and Amendments, and then identifies the key requirements of designing MU-MIMO MAC protocols for WLANs. After that, the most representative MU-MIMO MAC proposals in the literature are overviewed by benchmarking their MAC procedures and examining the key components, such as the channel state information acquisition, de/pre-coding and scheduling schemes. Classifications and discussions on important findings of the surveyed MAC protocols are provided, based on which, the research challenges for designing effective MU-MIMO MAC protocols, as well as the envisaged MAC's role in the future heterogeneous networks, are highlighted.
Ruizhi Liao; Boris Bellalta; Miquel Oliver; Zhisheng Niu. MU-MIMO MAC Protocols for Wireless Local Area Networks: A Survey. 2014, 1 .
AMA StyleRuizhi Liao, Boris Bellalta, Miquel Oliver, Zhisheng Niu. MU-MIMO MAC Protocols for Wireless Local Area Networks: A Survey. . 2014; ():1.
Chicago/Turabian StyleRuizhi Liao; Boris Bellalta; Miquel Oliver; Zhisheng Niu. 2014. "MU-MIMO MAC Protocols for Wireless Local Area Networks: A Survey." , no. : 1.
Boris Bellalta; Azadeh Faridi; Jaume Barcelo; Vanesa Daza; Miquel Oliver. Performance analysis of a Multiuser Multi-Packet Transmission system for WLANs in non-saturation conditions. Computer Networks 2014, 60, 88 -100.
AMA StyleBoris Bellalta, Azadeh Faridi, Jaume Barcelo, Vanesa Daza, Miquel Oliver. Performance analysis of a Multiuser Multi-Packet Transmission system for WLANs in non-saturation conditions. Computer Networks. 2014; 60 ():88-100.
Chicago/Turabian StyleBoris Bellalta; Azadeh Faridi; Jaume Barcelo; Vanesa Daza; Miquel Oliver. 2014. "Performance analysis of a Multiuser Multi-Packet Transmission system for WLANs in non-saturation conditions." Computer Networks 60, no. : 88-100.