Artículos de revistas: "Radio Link Control"

1

Li, Zonglei, Lianshan Yan, Wei Pan y Bin Luo. "The optimization of radio over fiber link by proper link gain control". China Communications 11, n.º 5 (mayo de 2014): 31–36. http://dx.doi.org/10.1109/cc.2014.6880458.

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2

Fendler, M., P. Descamps, J. P. Gouy, J. P. Vilcot y D. Decoster. "Fiber radio link based on microwave oscillator optical control". Microwave and Optical Technology Letters 18, n.º 3 (20 de junio de 1998): 193–96. http://dx.doi.org/10.1002/(sici)1098-2760(19980620)18:3<193::aid-mop9>3.0.co;2-a.

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3

Balachandran, Krishna, Keith F. Conner, Richard P. Ejzak y Sanjiv Nanda. "A proposal for EGPRS radio link control using link adaptation and incremental redundancy". Bell Labs Technical Journal 4, n.º 3 (14 de agosto de 2002): 19–36. http://dx.doi.org/10.1002/bltj.2177.

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4

Huang, Senhua, Xin Liu y Zhi Ding. "Decentralized Cognitive Radio Control Based on Inference from Primary Link Control Information". IEEE Journal on Selected Areas in Communications 29, n.º 2 (febrero de 2011): 394–406. http://dx.doi.org/10.1109/jsac.2011.110212.

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5

Sheikh, A. U. H., D. C. Coll, R. G. Ayers y J. H. Bailey. "ATCS: Advanced Train Control System radio data link design considerations". IEEE Transactions on Vehicular Technology 39, n.º 3 (1990): 256–62. http://dx.doi.org/10.1109/25.131007.

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6

Leushin, A. V. "INCREASED NOISE IMMUNITY COMMAND RADIO LINK SIGNALS WITH OFDM". RADIO COMMUNICATION TECHNOLOGY, n.º 49 (21 de julio de 2021): 7–20. http://dx.doi.org/10.33286/2075-8693-2021-49-07-20.

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Reviewed the work of the command radio link with OFDM signals, which implements a quasicorrelative reception phaseshift keyed signals without a timing that provides improved immunity system and the ability to work in low relations signal/noise at low requirements to stabilize the frequencies of the reference oscillators of transmitter and receiver. The noise immunity estimation of the proposed system in comparison with radio lines operating with signals of frequency telegraphy and relative phase telegraphy is given. The main problematic issues of building a command radio control line caused by the use of OFDM signals are revealed.

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7

Lim, Kwang Jae, Kyung Sup Kwak, Seog Gyu Kim y Sun Park. "Medium access and radio link control algorithms for mobile multimedia CDMA". Journal of Communications and Networks 1, n.º 4 (diciembre de 1999): 275–85. http://dx.doi.org/10.1109/jcn.1999.6597009.

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8

Wu, Chuan Sheng. "A Radio Link Logical Relationship between and One Network Apparatus". Advanced Materials Research 989-994 (julio de 2014): 4249–52. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.4249.

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MAC layer, a radio link control (RLC) layer and a broadcast and multicast control (BMC) layer exist in a second layer. The MAC layer maps various logical channels to various transport channels and performs logical channel multiplexing to map a plurality of logical channels to one transport channel.The MAC layer is connected to the RLC layer, which is a higher layer, through a logical channel. The logical channel is divided into a control channel for transmitting information on a control plane and a traffic channel for transmitting information on a user plane, according to the kind of transmitted information.

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9

Hiroike, Akira y Tadashi Matsumoto. "Performance evaluation of radio link control protocol using stop-and-wait arq in mobile radio systems". Electronics and Communications in Japan (Part I: Communications) 74, n.º 3 (marzo de 1991): 78–87. http://dx.doi.org/10.1002/ecja.4410740308.

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10

Aladov, Andrey V., Vladimir P. Valyukhov, Vladimir D. Kuptsov, Sergey V. Demin y Anna V. Valyukhova. "Special features of radio control link for energy efficient LED light sources". St. Petersburg Polytechnical University Journal: Physics and Mathematics 3, n.º 2 (junio de 2017): 99–107. http://dx.doi.org/10.1016/j.spjpm.2017.05.001.

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11

Lowrance, Christopher J. y Adrian P. Lauf. "Link Estimation in Robot Networks for Multi-Radio Control and Range Extension". Journal of Intelligent & Robotic Systems 85, n.º 2 (11 de mayo de 2016): 245–75. http://dx.doi.org/10.1007/s10846-016-0372-x.

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12

Li, Mingming, Jiaru Lin, Fazhong Liu, Dongxu Wang y Li Guo. "Cognitive MIMO Radio". International Journal of Cognitive Informatics and Natural Intelligence 5, n.º 2 (abril de 2011): 58–79. http://dx.doi.org/10.4018/jcini.2011040104.

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The authors consider a cognitive radio network in which a set of cognitive users make opportunistic spectrum access to one primary channel by time-division multiplexing technologies. Multiple Input Multiple Output techniques (MIMO) are similarly considered to enhance the stable throughput for cognitive links while they should guarantee co-channel interference constraints to the primary link. Here, two different cases are considered: one is that cognitive radio network is distributed; the other is centrally-controlled that cognitive radio network has a cognitive base station. In the first case, how to choose one fixed cognitive user and power control for each transmission antenna at the cognitive base station are considered to maximize the cognitive link’s stable throughput. In the second case, a scheme to choose a group of cognitive users and a Zero-Forcing method to pre-white co-channel interference to the primary user, are also proposed in order to maximize cognitive base station’s sum-rate. The algorithm can be employed to realize opportunistic spectrum transmission over the wireless fading channels.

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13

Song, Taewon y Taeyoon Kim. "Performance Analysis of Synchronous Multi-Radio Multi-Link MAC Protocols in IEEE 802.11be Extremely High Throughput WLANs". Applied Sciences 11, n.º 1 (30 de diciembre de 2020): 317. http://dx.doi.org/10.3390/app11010317.

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The representative media access control (MAC) mechanism of IEEE 802.11 is a distributed coordination function (DCF), which operates based on carrier-sense multiple access with collision avoidance (CSMA/CA) with binary exponential backoff. The next amendment of IEEE 802.11 being developed for future Wi-Fi by the task group-be is called IEEE 802.11be, where the multi-link operation is mainly discussed when it comes to MAC layer operation. The multi-link operation discussed in IEEE 802.11be allows multi-link devices to establish multiple links and operate them simultaneously. Since the medium access on a link may affect the other links, and the conventional MAC mechanism has just taken account of a single link, the DCF should be used after careful consideration for multi-link operation. In this paper, we summarize the DCFs being reviewed to support the multi-radio multi-link operation in IEEE 802.11be and analyze their performance using the Markov chain model. Throughout the extensive performance evaluation, we summarize each MAC protocol’s pros and cons and discuss essential findings of the candidate MAC protocols.

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14

Jiang, Junfeng, Zhigang Cao y Zihua Guo. "Delay analysis and dynamic tuning of an acknowledged mode radio link control protocol". Wireless Personal Communications 43, n.º 4 (24 de abril de 2007): 1209–27. http://dx.doi.org/10.1007/s11277-007-9296-x.

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15

Uykan, Z. y H. N. Koivo. "Proportional Power Control Algorithm for Time Varying Link Gains in Cellular Radio Systems". IEEE Transactions on Vehicular Technology 55, n.º 1 (enero de 2006): 341–49. http://dx.doi.org/10.1109/tvt.2005.861210.

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16

S.Ibrahim, Amin, Abdelhalim Zekry y Hussein A. Elsayed. "Design and Implementation of Radio Link Control as a Part of the WCDMA Radio Interface Protocols by using SDL". International Journal of Computer Applications 56, n.º 16 (20 de octubre de 2012): 40–47. http://dx.doi.org/10.5120/8979-3196.

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17

Macconi, D., E. Torresi, P. Grandi, B. Boccardi y C. Vignali. "Radio morphology–accretion mode link in Fanaroff–Riley type II low-excitation radio galaxies". Monthly Notices of the Royal Astronomical Society 493, n.º 3 (27 de febrero de 2020): 4355–66. http://dx.doi.org/10.1093/mnras/staa560.

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ABSTRACT Fanaroff–Riley type II (FR II) low-excitation radio galaxies (LERGs) are characterized by weak nuclear excitation on parsec-scales and properties typical of powerful FR IIs (defined as high-excitation radio galaxies, hereafter HERGs/BLRGs) on kiloparsec-scales. Since a link between the accretion properties and the power of the produced jets is expected both from theory and observations, their nature is still debated. In this work, we investigate the X-ray properties of a complete sample of 19 FR II-LERGs belonging to the 3CR catalogue, exploiting Chandra and XMM–Newton archival data. We also analyse 32 FR II-HERGs/BLRGs with Chandra data as a control sample. We compared FR II-LERG and FR II-HERG/BLRG X-ray properties and optical data available in literature to obtain a wide outlook of their behaviour. The low accretion rate estimates for FR II-LERGs, from both X-ray and optical bands, allow us to firmly reject the hypothesis as they are the highly obscured counterpart of powerful FR II-HERGs/BLRGs. Therefore, at least two hypothesis can be invoked to explain the FR II-LERG nature: (i) they are evolving from classical FR IIs because of the depletion of accreting cold gas in the nuclear region, while the extended radio emission is the heritage of a past efficiently accreting activity; and (ii) they are an intrinsically distinct class of objects with respect to classical FR Is/FR IIs. Surprisingly, in this direction, a correlation between accretion rates and environmental richness is found in our sample. The richer the environment is, the more inefficient is the accretion. In this framework, the FR II-LERGs are intermediate between FR Is and FR II-HERGs/BLRGs both in terms of accretion rate and environment.

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18

HIRONO, Masahiko y Toshio NOJIMA. "A New Signaling Architecture THREP with Autonomous Radio-Link Control for Wireless Communications Systems". IEICE Transactions on Electronics E92-C, n.º 9 (2009): 1163–69. http://dx.doi.org/10.1587/transele.e92.c.1163.

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19

Chatterjee, M., G. D. Mandyam y S. K. Das. "Joint Reliability of Medium Access Control and Radio Link Protocol in 3G CDMA Systems". IEEE Transactions on Computers 54, n.º 12 (diciembre de 2005): 1584–97. http://dx.doi.org/10.1109/tc.2005.198.

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20

Sun, Wei, Qiyue Li, Jianping Wang, Liangfeng Chen, Daoming Mu y Xiaojing Yuan. "A radio link reliability prediction model for wireless sensor networks". International Journal of Sensor Networks 27, n.º 4 (2018): 215. http://dx.doi.org/10.1504/ijsnet.2018.093960.

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21

Muñoz, Pablo, Isabel de la Bandera, Fernando Ruiz, Salvador Luna-Ramírez, Raquel Barco, Matías Toril, Pedro Lázaro y Jaime Rodríguez. "Computationally-Efficient Design of a Dynamic System-Level LTE Simulator". International Journal of Electronics and Telecommunications 57, n.º 3 (1 de septiembre de 2011): 347–58. http://dx.doi.org/10.2478/v10177-011-0047-2.

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Computationally-Efficient Design of a Dynamic System-Level LTE SimulatorThe Long-Term Evolution (LTE) is the next generation of current mobile telecommunication networks. LTE has a new flat radio-network architecture and a significant increase in spectrum efficiency. In this paper, a computationally-efficient tool for dynamic system-level LTE simulations is proposed. A physical layer abstraction is performed to predict link-layer performance with a low computational cost. At link layer, there are two important functions designed to increase the network capacity: Link Adaptation and Dynamic Scheduling. Other Radio Resource Management functionalities such as Admission Control and Mobility Management are performed at network layer. The simulator is conceived for large simulated network time to allow evaluation of optimization algorithms for the main network-level functionalities.

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22

Lee, Alfred T. "Data Link Communications in the National Airspace System". Proceedings of the Human Factors Society Annual Meeting 33, n.º 2 (octubre de 1989): 57–60. http://dx.doi.org/10.1177/154193128903300212.

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In the near future, conventional radio communications, currently the primary medium for the transfer of information between aircraft and ground stations, will be replaced by digital data link. This paper briefly describes this technology and summarizes what are believed to be the principal human factor issues associated with data link implementation in the airspace system. Integration of data link communications with existing systems on the flight deck and in the Air Traffic Control system is discussed with regard for both near term implementation and longer term operational issues.

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23

SHUEH, F. y W. ERICCHEN. "Optimum OVSF code reassignment in Wideband CDMA forward radio link". Information Sciences 174, n.º 1-2 (28 de junio de 2005): 81–101. http://dx.doi.org/10.1016/j.ins.2004.08.001.

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24

Savkin, Andrey V. y Pubudu N. Pathirana. "Decentralized power control in cellular mobile radio systems with nonlinear and time-varying link gains". Computer Communications 33, n.º 10 (junio de 2010): 1210–14. http://dx.doi.org/10.1016/j.comcom.2010.03.010.

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25

Yoon, Wonyong, Dongman Lee, Byoungheon Shin y Seon Yeong Han. "Price-based congestion control and local channel-link assignment for multi-radio wireless mesh networks". Computers & Electrical Engineering 40, n.º 2 (febrero de 2014): 651–62. http://dx.doi.org/10.1016/j.compeleceng.2013.11.002.

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26

Saini, Jatinder Singh y Balwinder Singh Sohi. "Performance evaluation of interference aware topology power and flow control channel assignment algorithm". International Journal of Electrical and Computer Engineering (IJECE) 10, n.º 3 (1 de junio de 2020): 2503. http://dx.doi.org/10.11591/ijece.v10i3.pp2503-2512.

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Multi-Radio Multi-Channel Wireless Mesh Network (MRMC-WMN) has been considered as one of the key technology for the enhancement of network performance. It is used in a number of real-time applications such as disaster management system, transportation system and health care system. MRMC-WMN is a multi-hop network and allows simultaneous data transfer by using multiple radio interfaces. All the radio interfaces are typically assigned with different channels to reduce the effect of co-channel interference. In MRMC-WMN, when two nodes transmit at the same channel in the range of each other, generates co-channel interference and degrades the network throughput. Co-channel interference badly affects the capacity of each link that reduces the overall network performance. Thus, the important task of channel assignment algorithm is to reduce the co-channel interference and enhance the network performance. In this paper, the problem of channel assignment has been addressed for MRMC-WMN. We have proposed an Interference Aware, Topology, Power and Flow Control (ITPFC) Channel Assignment algorithm for MRMC-WMN. This algorithm assignes the suitable channels to nodes, which provides better link capacity and reduces the co-channel interference. In the previous work performance of the proposed algorithm has been evaluated for a network of 30 nodes. The aim of this paper is to further evaluate the performance of proposed channel assignment algorithm for 40 and 50 nodes network. The results obtained from these networks show the consistent performance in terms of throughput, delay, packet loss and number of channels used per node as compared to LACA, FCPRA and IATC Channel Assignment algorithms.

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27

Park, Jaehyoung, Yonggang Kim, Gyungmin Kim y Hyuk Lim. "Majority Voting-Based MAC Protocol for Exploiting Link-Layer Diversity in Wireless Networks". Sensors 21, n.º 8 (12 de abril de 2021): 2706. http://dx.doi.org/10.3390/s21082706.

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In wireless local area networks (WLANs), the effect of interference signals between neighboring nodes increases as the number of wireless nodes using limited radio frequency resources in a limited space increases, which can significantly degrade the reliability of data transmission. In high-density WLANs, there can be several neighboring access points (APs) that can receive uplink transmission from a station. In conventional medium access control (MAC) protocols, uplink data frames containing errors or transmitted from a non-associated station are discarded at APs. Alternatively, we propose a MAC protocol using redundant wireless links between neighboring APs and the non-associated stations. In the proposed MAC protocol, we consider a centralized WLAN with a control node that performs error corrections of erroneous uplink data frames via a majority voting algorithm-based link-layer diversity scheme using uplink data received from multiple APs to increase the reliability of data transmission. In addition, we propose an adaptive carrier sensing ranging mechanism to improve the uplink network throughput in the proposed centralized WLAN system. Further, we conduct simulation studies and software-defined radio-based experiments to evaluate the performance of the proposed MAC protocol in various WLAN scenarios.

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28

Le, Thien Thi Thanh y Sangman Moh. "Energy-Efficient Protocol of Link Scheduling in Cognitive Radio Body Area Networks for Medical and Healthcare Applications". Sensors 20, n.º 5 (1 de marzo de 2020): 1355. http://dx.doi.org/10.3390/s20051355.

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Wireless body area networks (WBANs) have become a new paradigm for electronic healthcare applications; for instance, they are used to efficiently monitor patients in real-time. In this paper, an energy-efficient link scheduling (ELS) protocol for cognitive radio body area networks (CRBANs) is proposed, which aims to minimize energy consumption in CRBANs, while achieving higher probabilities of successful transmissions with multiple CRBANs. The proposed ELS transmits packets in the common control channel to control transmission links amongst CRBANs to the gateway and vice versa. The transmissions of CRBANs to the gateway are scheduled at a specific time by the gateway in different data channels, according to the traffic priority of CRBANs. Packet delivery ratio, delay, and energy consumption are evaluated for multiple CRBANs via extensive simulation.

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29

Ogunrinola, Olawale Oluwasegun, Isaiah Opeyemi Olaniyi, Segun A. Afolabi, Gbemiga Abraham Olaniyi y Olushola Emmanuel Ajeigbe. "Modelling and Development of a Radio Resource Control and Scheduling Algorithm for Long-Term Evolution (LTE) Uplink". Review of Computer Engineering Studies 8, n.º 2 (30 de junio de 2021): 23–34. http://dx.doi.org/10.18280/rces.080201.

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Modern radio communication services transmit signals from an earth station to a high-altitude station, space station or a space radio system via a feeder link while in Global Systems for Mobile Communication (GSM) and computer networks, the radio uplink transmit from cell phones to base station linking the network core to the communication interphase via an upstream facility. Hitherto, the Single-Carrier Frequency Division Multiple Access (SC-FDMA) has been adopted for uplink access in the Long-Term Evolution (LTE) scheme by the 3GPP. In this journal, the LTE uplink radio resource allocation is addressed as an optimization problem, where the desired solution is the mapping of the schedulable UE to schedulable Resource Blocks (RBs) that maximizes the proportional fairness metric. The particle swarm optimization (PSO) has been employed for this research. PSO is an algorithm that is very easy to implement to solve real time optimization problems and has fewer parameters to adjust when compared to other evolutionary algorithms. The proposed scheme was found to outperform the First Maximum Expansion (FME) and Recursive Maximum Expansion (RME) in terms of simulation time and fairness while maintaining the throughput.

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30

Ha, Tien Ngoc, Xuan-Xinh Nguyen y Hoang Kha Ha. "Energy Efficiency Maximization for Full Duplex MIMO Cloud Radio Access Networks". Science & Technology Development Journal - Engineering and Technology 3, n.º 3 (15 de enero de 2021): first. http://dx.doi.org/10.32508/stdjet.v3i3.685.

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This paper studies a joint precoder and fronthaul compression design for full-duplex (FD) miltiple-input-multiple-output (MIMO) cloud radio access networks (CRANs). A cloud control unit (CU) communicates with multiple downlink and uplink users through FD radio units (RUs) connected to the CU through fronthaul links which are limited capacity. We address the energy efficiency (EE) maximization problem subject to the transmit power constraints at each RU, each user and the limited capacity of fronthaul links. Since the formulated design problem is a highly non-convex problem in design variables, we exploit a successive convex approximation (SCA) method to obtain the concave lower bound of the achievable sum rate and a convex upper bound of limited capacity fronthaul link functions. Then, we apply the Dinkelbach method to develop an efficient iterative algorithm guaranteeing convergence in which the convex optimization problems are solved. Numerical results are provided to investigate the EE of the proposed algorithm.

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31

Wu, Nan, Chengguo Liu, Bin Zhang, Shuai Zhou, Jingwei Zhang y Zhi P. Wu. "Wireless bi-directional data link for smart temperature recording". Transactions of the Institute of Measurement and Control 39, n.º 4 (19 de noviembre de 2016): 420–28. http://dx.doi.org/10.1177/0142331216675402.

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In application systems of the Internet of Things (IoT), real-time monitoring and control of the systems need to be realized with wireless communications from machine to machine (M2M), especially under harsh application scenarios. The data link of the M2M communication has also a critical effect on the system in the application. In this paper, a wireless bi-directional data link for smart temperature recording is reported. The radio frequency hardware employed consists of NRF24L01 wireless transceivers, RFX2401 amplifiers and matching network sand antennas. The microcontroller unit (MCU) is based on the STM32F103VET6 chip, which controls the NRF24L01 by a four-pin serial peripheral interface (SPI) to realize the bi-directional data link, and the sensor data are sampled with 12-bit analogue-to-digital converters (ADCs). The communication is realized as the interrupt request (IRQ) signal of the NRF24L01 changes periodically. A look-up table and a linear optimization method are also implemented to improve the accuracy of ADC data. The bi-directional data link is then applied to a wired heating control system. The results show that temperature data can be transmitted and received over a distance up to 320 m in an open environment and 52 m in an indoor complex environment with the hardware implemented. The real-time temperature data can be displayed on a computer or a handheld device. Wireless M2M communication and control are thus demonstrated.

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32

Le, Thien Thi Thanh y Sangman Moh. "A Spectrum-Aware Priority-Based Link Scheduling Algorithm for Cognitive Radio Body Area Networks". Sensors 19, n.º 7 (5 de abril de 2019): 1640. http://dx.doi.org/10.3390/s19071640.

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With the development of wireless communication technology, wireless body area networks (WBANs) have become a fundamental support tool in medical applications. In a real hospital scenario, however, the interference between wireless medical devices and WBANs may cause a high packet drop rate and high latency, which is harmful to patients using healthcare services. Nonetheless, cognitive radio is a promising technology for sharing the precious spectrum, which has high efficiency of the wireless resource. Thus, WBANs with cognitive radio capability are also exploited. We propose a spectrum-aware priority-based link scheduling (SPLS) algorithm for cognitive radio body area networks (CRBANs) in a real hospital scenario. In SPLS, three channels are used: DataCh, EDataCh, and CtrlCh for normal data, emergency data, and control messages, respectively. To avoid collision during data transmission, neighboring CRBANs send messages regarding the channel state with CtrlCh before the scheduling. The CRBANs can share DataCh in the time domain for improving the throughput. The SPLS algorithm allows a CRBAN to access idle channels on the licensed and unlicensed spectrum according to the CRBAN traffic. Our simulation results show that the proposed SPLS outperformed the conventional scheme in terms of packet delivery ratio, system throughput, latency, and energy efficiency.

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33

Peyrard, Fabrice. "Real-time performance evaluation of Bluetooth ARQ protocol". Journal of Communications Software and Systems 3, n.º 4 (20 de diciembre de 2007): 248. http://dx.doi.org/10.24138/jcomss.v3i4.246.

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These research tasks present a measurement platform of Bluetooth asynchronous links in order to get the intrinsic time constraints of this network and communications protocols. These time measurements are necessary for the application we wish to implement for mobile robot control through Bluetooth link communication. We present the platform as well as the measurement protocol which we have carried out from real-time communicating operating systems. We have developed an application of radio and time data processing allowing a real-time evaluation of the global behavior of the communicating system.

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34

Valkanis, Anastasios, Petros Nicopolitidis y Georgios Papadimitriou. "A Hybrid Link-TDMA MAC Protocol for Conventional and Radio over Fiber WLANs". Wireless Communications and Mobile Computing 2020 (4 de agosto de 2020): 1–15. http://dx.doi.org/10.1155/2020/9340272.

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During the last two decades, the IEEE 8201.11 family has multiplied data rate transmissions in wireless local area networks (WLANs). This progress is based on the adoption of new technologies concerning physical layer (PHY), combined with the enhancements in the medium access control (MAC) layer. Radio over Fiber (RoF) is a technology which can further extend this progress, combining the benefits of optical fiber and wireless networks. The current IEEE 802.11 MAC protocol is contention based, which leads to low utilization of the RoF PHY data rate and on the other hand cannot handle the effects of long propagation delays in RoF networks. In this paper, we present a new Hybrid Link Time Division Multiple Access (HL-TDMA) MAC protocol which addresses the above shortcomings and enhances the performance of both conventional and RoF WLANs. Then, through simulation, we evaluate the performance of the proposed protocol, which is shown to be superior to relevant RoF WLAN protocols in the literature.

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35

Divitskyi, Andriy, Serhii Salnyk, Vladyslav Hol, Pavlo Sydorkin y Anton Storchak. "Development of a model of a subsystem for forecasting changes in data transmission routes in special purpose mobile radio networks". Eastern-European Journal of Enterprise Technologies 3, n.º 9(111) (1 de julio de 2021): 116–25. http://dx.doi.org/10.15587/1729-4061.2021.235609.

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This research addressed the issue of improving the quality of service for the control system of mobile radio networks. The analysis of the forecasting sphere concerning the methods of service quality of mobile radio networks for special purposes, in particular, forecasting the time of congestion of data transmission routes is carried out. It is found that these methods are used in wired and computer networks operating at the network and data link levels. The basic parameters of the protocols of the channel and network layers of mobile radio networks are highlighted. Forecasting methods are analyzed: temporal extrapolation, causality, expert, and the main disadvantages are indicated. A model of a control system for mobile radio networks with a forecasting subsystem is shown. The features of mobile radio networks, which form the requirements for routing methods, are described. A lot of requirements have been put forward for the model of a control system for mobile radio networks. The structure of a model of a control system for mobile radio networks with an improved forecasting subsystem is proposed. On the basis of genetic algorithms, the tasks that arise in the process of identification, training and forecasting in the forecasting subsystem are solved. The operation of the processes consists in building a base of rules aimed at identifying significant dependencies in a time series based on the use of a genetic algorithm. It is based on the use of evolutionary principles to find the optimal solution. Application of the proposed model will allow real-time identification and will significantly improve the quality of service for mobile radio networks. It will increase the speed and volume of data processed during training, improve the quality and reliability of predicting changes in data transmission routes

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36

Long B. Le, E. Hossain y A. S. Alfa. "Radio link level performance evaluation in wireless networks using multi-rate transmission with ARQ-based error control". IEEE Transactions on Wireless Communications 5, n.º 10 (octubre de 2006): 2647–53. http://dx.doi.org/10.1109/twc.2006.04485.

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37

Manzoli, U. y M. L. Merani. "Goodput and delay analysis of a radio link control protocol operating over a multicarrier DS-CDMA architecture". IEEE Transactions on Wireless Communications 5, n.º 6 (junio de 2006): 1313–21. http://dx.doi.org/10.1109/twc.2006.1638652.

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38

Dinsman, Melissa. "Politics, Eugenics, and Yeats's Radio Broadcasts". International Yeats Studies 3, n.º 1 (1 de noviembre de 2018): 65–80. http://dx.doi.org/10.34068/iys.03.01.05.

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Much has been written about the right-wing politics and eugenicist sympathies of Yeats’s late-1930s poetry in general and about On the Boiler in particular. Yeats’s focus on Ireland’s degeneration and his calls for its regeneration through cultural (and even biological methods) coincided with his dalliance with the Irish Blueshirts and his frustrations with the transformations of the Irish Free State under Éamon de Valera. However, these years also proved to be Yeats’s most active in terms of radio broadcasting, with six of his nine broadcasts made between 1937 and 1938. In this essay, I read Yeats’s broadcasts, in particular “In the Poet’s Pub,” “In the Poet’s Parlour,” and “My Own Poetry” alongside On the Boiler to show how themes of degeneration and regeneration link these works. As a medium, radio could advance the cultural degeneration and pandering to the masses to which Yeats was opposed. However, it was also within radio’s capabilities to control modes of broadcasting, influencing the public and regenerating Irish culture through the dissemination of poetry.

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Hatsenko, S. S., Y. M. Koutnyi, V. V. Shypitko, D. O. Hrybovskyi y O. M. Maksymenko. "METHODOLOGY OF THE RATIONAL DISTRIBUTION OF FORCES AND MEANS OF RADIOELECTRONIC INTELLIGENCE ON THE TASK, OBJECT AND RESEARCH SOURCES FOR THE OPERATIONAL AND TACTICAL CONTROL LINK". Проблеми створення, випробування, застосування та експлуатації складних інформаційних систем, n.º 17 (30 de diciembre de 2019): 160–72. http://dx.doi.org/10.46972/2076-1546.2019.17.15.

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Armed aggression of the Russian Federation against Ukraine, loss of important industrial potentials, as Topaz State Joint Stock Holding Company, which specialized in the development and production of complex radio engineering systems and complexes, including unique long-range radio intelligence systems and early warning of anti-aircraft anti-aircraft systems Kolchuga radio intelligence provided a significant impetus for the development of radio electronic intelligence (EER) as one of the main, technical types of military intelligence Of Ukraine. Radio-electronic Intelligence of the Armed Forces of Ukraine is a set of measures and actions for obtaining intelligence on the armed forces of the reconnaissance states through exposing the functioning of radio-electronic means (PE3) and systems used for the control of troops (forces) and weapons, collection, processing, analysis and bringing this intelligence to specific consumers within the prescribed timeframe. The purpose of the EED is to expose early and guaranteed early warning signs of an imminent threat to the security of Ukraine by the reconnaissance states (blocs, coalitions), as well as to obtain intelligence for the effective preparation and use of the Armed Forces of Ukraine. To achieve the objective of the ERD, the ERD system is functioning, which is a set of interrelated and coordinated in their actions by the tasks, place and time of the ERD governing bodies of all units and forces and means of the military units (units) of the ERF OSF that perform certain intelligence tasks on a single purpose. and plan. Intelligence tasks and reconnaissance objects for the military units (units) of the EWP OSR are determined taking into account their purpose, availability of forces and capabilities and their capabilities. An important element of the planning of the EER, both in peacetime and in the operational period, is the rational (expedient) distribution of EER forces and resources in the military unit of the EOM in the tasks, objects and sources of intelligence. In the article, based on the analysis of problems of distribution of the resource of forces and means by tasks, objects and sources of radio-electronic intelligence, as the basic element of planning on command posts of military units (units) of the ER, the structure of partial distribution methodology for the organs of operational-tactical control unit is substantiated. The methodology is based on a systematic approach to the organization of intelligence, taking into account the requirements of adequacy in structural and functional image in modelling the relationship of tasks, objects and sources of intelligence. The main purpose of the methodology is to develop resource allocation plans to improve the efficiency of conducting electronic reconnaissance by system elements and to evaluate their capabilities.

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40

Sun, Zhuo y Wenbo Wang. "Investigation of Cooperation Technologies in Heterogeneous Wireless Networks". Journal of Computer Systems, Networks, and Communications 2010 (2010): 1–12. http://dx.doi.org/10.1155/2010/413987.

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Heterogeneous wireless networks based on varieties of radio access technologies (RATs) and standards will coexist in the future. In order to exploit this potential multiaccess gain, it is required that different RATs are managed in a cooperative fashion. This paper proposes two advanced functional architecture supporting the functionalities of interworking between WiMAX and 3GPP networks as a specific case: Radio Control Server- (RCS-) and Access Point- (AP-) based centralized architectures. The key technologies supporting the interworking are then investigated, including proposing the Generic Link Layer (GLL) and researching the multiradio resource management (MRRM) mechanisms. This paper elaborates on these topics, and the corresponding solutions are proposed with preliminary results.

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41

Kravchuk, Serhii, Liana Afanasieva y Irina Kravchuk. "INVESTIGATION OF A MILLIMETER-WAVE RADIO LINK CHARACTERISTICS OF IEEE 802.11AD STANDARD IN URBAN AREAS". Information and Telecommunication Sciences, n.º 1 (29 de junio de 2021): 5–11. http://dx.doi.org/10.20535/2411-2976.12021.5-11.

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Background. The explosive growth in the use of mobile broadband is significantly increasing the bandwidth requirements. Millimeter-wave spectrum is necessary for 5G networks to achieve data transfer rates of the order of Gb/s, in particular, for the provision of 3D video services, and the use radio modules for millimeter-wave frequencies as picocells in the streets will expand the capabilities of existing cellular networks and provide an increase in bandwidth. Therefore, the study of the characteristics of this spectrum is an urgent task today. Objective. The purpose of the paper is to present the results of studying the characteristics of a millimeter-wave radio link to ensure high-speed user access to IP data transmission networks and the possibility of using the IEEE 802.11ad standard in open areas. Methods. Structural and functional methods of constructing a millimeter-wave wireless network in urban areas based on IEEE 802.11ad standard hardware are investigated. Results. The studies were carried out using a test bench with a point-to-point topology deployed in an urban environment (Kiev) with the line of sight without significant obstacles. The studies tested the possibility of using for millimeter-wave hardware technologies of the IEEE 802.11ad standard, which is used indoors, for applications in urban areas. The use of a narrow beam antenna based on an antenna array allows adaptive control of the radiation pattern to bypass small obstacles blocking direct transmission, which allows reducing interference and receive/transmit a signal. Conclusions. Experimental testing of the hardware capabilities of the IEEE 802.11ad standard has been carried out. Scenarios for constructing a millimeter-wave radio link under various weather conditions have been worked out. Keywords: millimeter-wave; bandwidth; IEEE 802.11ad standard; 5G networks

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42

Olmedo, Gonzalo Fernando, Celso de Almeida y Renato Baldini. "Data transmission efficiency over CDMA systems employing RLP and FEC error control strategies on the radio link layer". IEEE Latin America Transactions 5, n.º 5 (septiembre de 2007): 280–86. http://dx.doi.org/10.1109/tla.2007.4378519.

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43

Asif Khan, Muhammad Kamal, Farman Ali, Muhammad Irfan, Fazal Muhammad, Faisal Althobiani, Asar Ali, Suliman Khan, Saifur Rahman, Grzegorz Perun y Adam Glowacz. "Mitigation of Phase Noise and Nonlinearities for High Capacity Radio-over-Fiber Links". Electronics 10, n.º 3 (1 de febrero de 2021): 345. http://dx.doi.org/10.3390/electronics10030345.

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Radio-over-fiber (RoF) links successfully provide high data rates and bandwidth capacity with a low complexity system architecture, as compared to its counterpart digital-RoF. In addition, the compound of quadrature amplitude modulation (QAM) and orthogonal frequency division multiplexed (OFDM) modulation schemes further enhance the process of these achievements. However, high data rates and bandwidth-capacity-supported RoF links face nonlinearities (NLs), linear distortions (LDs), and phase noise challenges that degrade the reliability of communication networks (CNs). Therefore, in this paper, to suppress NLs, LDs, and phase noise, next generation cloud radio access networks (CRANs) are investigated using RoF links and wavelength division multiplexing (WDM) methodology based on 16, 32, and 64 QAM-OFDM modulation schemes. The receiver of the proposed framework is designed, applying an improved digital signal processing (DSP) system that includes overlap frequency domain equalization (OFDE), a synchronization process, and time domain equalization (TDE). Theoretical and simulation models are organized for estimating the proposed RoF link with the aid of different values of transmission ranges, input power, output power, bit rate, bits per symbol, channel spacing, and the number of users. The fitness of the model matches that of existing approaches.

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44

Gerhardt, D. "Definition of a parameter for a typical specific absorption rate under real boundary conditions of cellular phones in a GSM networkd". Advances in Radio Science 1 (5 de mayo de 2003): 335–38. http://dx.doi.org/10.5194/ars-1-335-2003.

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Abstract. Using cellular phones the specific absorption rate (SAR) as a physical value must observe established and internationally defined levels to guarantee human protection. To assess human protection it is necessary to guarantee safety under worst-case conditions (especially maximum transmitting power) using cellular phones. To evaluate the exposure to electromagnetic fields under normal terms of use of cellular phones the limitations of the specific absorption rate must be pointed out. In a mobile radio network normal terms of use of cellular phones, i.e. in interconnection with a fixed radio transmitter of a mobile radio network, power control of the cellular phone as well as the antenna diagram regarding a head phantom are also significant for the real exposure. Based on the specific absorption rate, the antenna diagram regarding a head phantom and taking into consideration the power control a new parameter, the typical absorption rate (SARtyp), is defined in this contribution. This parameter indicates the specific absorption rate under average normal conditions of use. Constant radio link attenuation between a cellular phone and a fixed radio transmitter for all mobile models tested was assumed in order to achieve constant field strength at the receiving antenna of the fixed radio transmitter as a result of power control. The typical specific absorption rate is a characteristic physical value of every mobile model. The typical absorption rate was calculated for 16 different mobile models and compared with the absorption rate at maximum transmitting power. The results confirm the relevance of the definition of this parameter (SARtyp) as opposed to the specific absorption rate as a competent and applicable method to establish the real mean exposure from a cellular phone in a mobile radio network. The typical absorption rate provides a parameter to assess electromagnetic fields of a cellular phone that is more relevant to the consumer.

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45

Ruiz-Avilés, J. M., S. Luna-Ramírez, M. Toril, F. Ruiz, I. de la Bandera, P. Muñoz, R. Barco, P. Lázaro y V. Buenestado. "Design of a Computationally Efficient Dynamic System-Level Simulator for Enterprise LTE Femtocell Scenarios". Journal of Electrical and Computer Engineering 2012 (2012): 1–14. http://dx.doi.org/10.1155/2012/802606.

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In the context of Long-Term Evolution (LTE), the next generation mobile telecommunication network, femtocells are low-power base stations that efficiently provide coverage and capacity indoors. This paper presents a computationally efficient dynamic system-level LTE simulator for enterprise femtocell scenarios. The simulator includes specific mobility and traffic and propagation models for indoor environments. A physical layer abstraction is performed to predict link-layer performance with low computational cost. At link layer, two important functions are included to increase network capacity: Link Adaptation and Dynamic Scheduling. At network layer, other Radio Resource Management functionalities, such as Admission Control and Mobility Management, are also included. The resulting tool can be used to test and validate optimization algorithms in the context of Self-Organizing Networks (SON).

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46

Ueda, Kiyoshi y Takumi Miyoshi. "Autonomous Navigation Control of UAV Using Wireless Smart Meter Devices". Journal of Telecommunications and Information Technology 2 (28 de junio de 2019): 64–72. http://dx.doi.org/10.26636/jtit.2019.132319.

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In preparation for the upcoming home delivery services that rely on Unmanned Aerial Vehicles (UAVs), we developed a new multi-hop radio network that is laid over a smart meter network transferring electric energy information only. In this network, a UAV follows, for navigation purposes, the topology of a virtual network overlaid on the physical smart meter network. We established a service management control method which does not rely on image analysis or map information processing, i.e. processes that consume precious power resources of the UAV. Instead, navigation is based on the routing technology. The current distance between the UAV and a node of the smart meter network is measured by means of the radio transmission loss value, therefore determining the position of the UAV. A two-layer network model has been proposed. One layer consists of a network of nodes in a residential area with scattered buildings – a location that is safer to navigate – while the other is an access network of nodes in a densely populated area. Then, we proposed methods to determine the direction of movement towards the next hop node on the data-link layer and the end node on the network layer, which is the target destination. We implemented a software-based test system and veriﬁed the eﬀectiveness of the proposed methods.

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Tang, Suhua y Sadao Obana. "Energy Efficient Downlink Transmission in Wireless LANs by Using Low-Power Wake-Up Radio". Wireless Communications and Mobile Computing 2017 (2017): 1–12. http://dx.doi.org/10.1155/2017/2405381.

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In the downlink of a wireless LAN, power-save mode is a typical method to reduce power consumption. However, it usually causes large delay. Recently, remote wake-up control via a low-power wake-up radio (WuR) has been introduced to activate a node to instantly receive packets from an access point (AP). But link quality is not taken into account and protocol overhead of wake-up per node is relatively large. To solve these problems, in this paper, a broadcast-based wake-up control framework is proposed, and a low-power WuR is used to receive traffic indication map from an AP, monitor link quality, and perform carrier sense. Among the nodes which have packets buffered at the AP, only those whose SNR is above a threshold will be activated, contending via a proper contention window to receive packets from the AP. Optimal SNR threshold, deduced by theoretical analysis, helps to reduce transmission collisions and false wake-ups (caused by wake-up latency) and improve transmission rate. Extensive simulations confirm that the proposed method (i) effectively reduces power consumption of nodes compared with other methods, (ii) has less delay than power-save mode in times of light traffic, and (iii) achieves higher throughput than other methods in the saturation state.

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48

Legkostup, V. V. y V. E. Markevich. "Methodology of determining of the transfer function of engagement kinematics of accelerations of an aircraft and its elliptic coordinates used for thr guidance based on time difference of arrival". «System analysis and applied information science», n.º 1 (26 de abril de 2021): 12–20. http://dx.doi.org/10.21122/2309-4923-2021-1-12-20.

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This paper discusses the problem of determining a kinematics (in terms of transfer function, as far as possible) of parameters of the motion of an aircraft expressed in the curvilinear coordinate system and control accelerations expressed in a rectangular coordinate system. Examples of curvilinear coordinate systems using in practice can be polar, biangular, two-center bipolar, elliptic, parabolic cylindrical, spherical, ellipsoidal, coordinate systems. A technique for obtaining a kinematic link for the control problem of an unmanned aerial vehicle in the elliptic coordinate system was described. It allowed to obtain simpler view of the kinematic link which could provide navigation an aircraft along the hyperbola deriving from the time difference of arrival navigation system. It can. As a result, it is possible to reduce the number of the navigation radio beacons.

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Anderson, Philip S., Russell S. Ladkin y Ian A. Renfrew. "An Autonomous Doppler Sodar Wind Profiling System". Journal of Atmospheric and Oceanic Technology 22, n.º 9 (1 de septiembre de 2005): 1309–25. http://dx.doi.org/10.1175/jtech1779.1.

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Abstract An autonomous Doppler sodar wind profiling system has been designed, built, tested, and then deployed for 2 years at a remote site in Coats Land, Antarctica. The system is designed around a commercially available phased-array sodar (a Scintec flat-array sodar, FAS64) and powered from five modular power system units. Each power unit comprises two batteries, two photovoltaic solar panels, and two vertical axis wind generators, plus charging control and isolation circuitry. The sodar’s main processing unit is located at the antenna, but is controlled from a manned research station 50 km distant, in real time, by a line-of-sight UHF radio link. Data from an integral automatic weather station (AWS) are also transmitted over the radio link, allowing meteorologically informed decisions on whether or not to operate the Doppler sodar. Over the 2-yr experiment dozens of sounding episodes, lasting from a few hours to a few days, were obtained. Successful soundings were obtained in temperatures down to −33°C, and wind speeds up to 12 m s−1. In general, the wind data quality was good, but the range was disappointing, probably as a result of the strongly stable atmospheric conditions that were experienced. The wind profiling system that is described has been used to obtain the first remote wintertime observations of katabatic winds over the Antarctic continent.

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Esposito, Joel M. "Maintaining Wireless Connectivity Constraints for Robot Swarms in the Presence of Obstacles". Journal of Robotics 2011 (2011): 1–12. http://dx.doi.org/10.1155/2011/571485.

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The swarm paradigm of multirobot cooperation relies on a distributed architecture, where each robot makes its own decisions based on locally available knowledge. But occasionally the swarm members may need to share information about their environment or actions through some type of ad hoc communication channel, such as a radio modem, infrared communication, or an optical connection. In all of these cases robust operation is best attained when the transmitter/receiver robot pair is (1) separated by less than some maximum distance (range constraint); and (2) not obstructed by large dense objects (line-of-sight constraint). Therefore to maintain a wireless link between two robots, it is desirable to simultaneously comply with these two spatial constraints. Given a swarm of point robots with specified initial and final configurations and a set of desired communication links consistent with the above criteria, we explore the problem of designing inputs to achieve the final configuration while preserving the desired links for the duration of the motion. Some interesting conclusions about the feasibility of the problem are offered. A potential field-based optimization algorithm is provided, along with a novel composition scheme, and its operation is demonstrated through both simulation and experimentation on a group of small robots.

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