The Experts below are selected from a list of 21042 Experts worldwide ranked by ideXlab platform
Satoshi Nagata - One of the best experts on this subject based on the ideXlab platform.
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physical cell id detection probability using synchronization signals of nb iot Radio Interface in 28 ghz band
Vehicular Technology Conference, 2020Co-Authors: Daisuke Inoue, Kyogo Ota, Satoshi NagataAbstract:This paper presents the physical-layer cell identity (PCID) detection probability using the narrowband primary synchronization signal (NPSS) and narrowband secondary synchronization signal (NSSS) based on the narrowband Internet-of-Things (NB-IoT) Radio Interface considering frequency offset and the maximum Doppler frequency in the 28-GHz band. Simulation results show that autocorrelation based NPSS detection achieves almost the same PCID detection probability as that for cross-correlation based NPSS detection using frequency offset estimation and compensation before the NPSS received timing detection, while the former achieves a lower level of computational complexity than the latter. We also show that when using autocorrelation based NPSS detection, the loss in the PCID detection probability at the carrier frequency of $f_{c}=28$ GHz compared to that for $f_{c}=3.5$ GHz is only approximately 5% at the average received SNR of 0dB when the frequency error of a temperature compensated crystal oscillator of a set of user equipment (UE) is 20 ppm. Therefore, we conclude that the multiplexing schemes and sequences of NPSS and NSSS based on the NB-IoT Radio Interface associated with autocorrelation based NPSS detection will be applicable to the 28-GHz frequency spectra.
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physical cell id detection probability using synchronization signals for nr Radio Interface in 28 ghz band
Asia-Pacific Conference on Communications, 2019Co-Authors: Kyogo Ota, Satoshi NagataAbstract:This paper presents the physical-layer cell identity (PCID) detection probability using the primary synchronization signal (PSS) and secondary synchronization signal (SSS) for the New Radio (NR) Radio Interface considering the large frequency offset in the 28-GHz band. Simulation results show that crosscorrelation based PSS detection achieves a slightly higher PCID detection probability compared to autocorrelation based PSS detection in the lower average received signal-to-noise power ratio (SNR) below approximately 0 dB for the subcarrier spacings (SCSs) of 120 and 240 kHz. Meanwhile, the required computational complexity for the PCID detection of the latter method is much lower than the former method. We also show that when the frequency error of a standard oscillator of a set of user equipment is e = 20 ppm, the PCID detection probability is decreased by only approximately 28 (22)% and 3 (6)% compared to that without frequency offset at the average received SNR of −10 and 0 dB, respectively, for the SCS of 240 (120) kHz. We conclude that the multiplexing scheme for the PSS and SSS and their sequences are effective in achieving a high PCID detection probability considering the large frequency offset even with e = 30 ppm in the 28-GHz band.
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physical cell id detection probability using synchronization signals for nr Radio Interface below 6 ghz
Asia-Pacific Conference on Wearable Computing Systems, 2019Co-Authors: Kyogo Ota, Satoshi NagataAbstract:This paper presents the physical cell identity (PCID) detection probability using synchronization signals based on the New Radio Radio Interface considering the frequency offset, maximum Doppler frequency, and co-channel interference (CCI) for frequency spectra below 6 GHz based on link-level simulations. We assume cross-correlation based primary synchronization signal detection, followed by frequency offset estimation and compensation, and then secondary synchronization signal detection. Simulation results show that the PCID detection probability is degraded according to the increase in the frequency offset for the subcarrier spacings (SCSs) of 15 and 30 kHz. However, we show that the 30-kHz SCS is more effective in mitigating the degradation in the PCID detection probability than the 15-kHz SCS for a frequency offset greater than approximately 20 kHz. We also show that a high PCID detection probability is achieved for the maximum Doppler frequency of up to 888.8 Hz, which corresponds to the moving speed of 480 km/h at the carrier frequency of 2 GHz. Finally, we show that the PCID detection probability with the received signal-to-interference power ratios of -3 dB and 0 dB is degraded by approximately 7% and 52%, respectively, compared to that without the CCI at the average received signal-to-noise ratio of 0 dB for the maximum frequency offset of 20 kHz.
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Performance of Physical Cell ID Detection Probability Considering Frequency Offset for NR Radio Interface
2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall), 2019Co-Authors: Kyogo Ota, Aya Shimura, Satoshi NagataAbstract:This paper presents the physical-layer cell identity (PCID) detection probability considering frequency offset for 5th generation (5G) new Radio (NR). We compare the primary synchronization signal (PSS) and PCID detection probabilities of three PSS detection methods: cross-correlation based detection before frequency offset (FO) estimation and compensation, that after FO estimation and compensation, and autocorrelation based detection at a set of user equipment. Link- level simulation results show that the cross- correlation based PSS detection before the FO estimation and compensation achieves the highest PSS and PCID detection probabilities in the carrier frequency fc region lower than approximately 14 GHz at the average received signal-to-noise power ratio of 0 dB for the standard oscillator frequency error of 1 ppm. The cross-correlation based PSS detection after the FO estimation and compensation achieves much higher PSS and PCID detection probabilities than that before the FO estimation and compensation for the fc region higher than approximately 14 GHz. The PCID detection probability of the cross-correlation based PSS detection after the FO estimation and compensation is close to that of the autocorrelation based PSS detection according to the increase in the fc value. Therefore, we conclude that by switching the cross- correlation based PSS detection methods before and after the FO estimation and compensation, the PSS and secondary synchronization signal structures based on the NR Radio Interface achieve a high PCID detection probability for the fc value up to 60 GHz.
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physical cell id detection probability using synchronization signals for nr Radio Interface
Wireless Personal Multimedia Communications, 2018Co-Authors: Kyogo Ota, Mamoru Sawahashi, Aya Shimura, Satoshi NagataAbstract:This paper presents the physical-layer cell identity (PCID) detection probability using precoding vector switching (PVS) transmit diversity and receive diversity for 5G new Radio (NR). We use the sequences and multiplexing schemes of the primary synchronization signal (PSS) and secondary synchronization signal (SSS) based on the 3rd Generation Partnership Project (3GPP) release 15 specifications to detect the best PCID among the 1008 candidates. Link-level simulation results show that receive diversity up to four antennas is very effective in achieving highly correct detection probabilities of the PSS and SSS sequences, the combination of which provides the PCID, regardless of the propagation channel model. We also show that PVS transmit diversity with two antennas improves the PCID detection probability by approximately 5% - 10% in the high average received signal-to-noise power ratio (SNR) region when the PCID detection probability is greater than approximately 50% in the case of up to four receive antennas. Because further improvement in the PCID detection probability by increasing the number of transmit antennas to 4 antennas is small, it is shown that the application of PVS transmit diversity with two antennas is suitable for achieving high PCID detection probability in the NR Radio Interface. These conclusions are applicable to beamforming transmission for the PSS and SSS.
Piotr Zwierzykowski - One of the best experts on this subject based on the ideXlab platform.
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Blocking Probability Calculation for Cellular Systems with WCDMA Radio Interface Servicing PCT1 and PCT2 Multirate Traffic
IEICE Transactions on Communications, 2009Co-Authors: Mariusz Glabowski, Maciej Stasiak, Arkadiusz Wisniewski, Piotr ZwierzykowskiAbstract:This article proposes a method that can calculate the blocking probability of multi-service cellular systems with Wideband Code Division Multiple Access Radio Interface. The method considers a finite and an infinite source population and takes into account the interdependency of calls service processes in neighboring cells and in both the uplink and the downlink directions. The basis of the proposed method is the fixed-point methodology. A comparison of the results of analytical calculations to those of simulations confirms the accuracy of the proposed method. The proposed scheme can realize cost-effective Radio resource management in 3G mobile networks and can be easily applied to network capacity calculations.
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analytical method of calculating blocking probability in 3g networks with spreading spectrum and a finite number of traffic sources
Theoretical and Applied Informatics, 2007Co-Authors: Maciej Stasiak, Arkadiusz Wiśniewski, Piotr ZwierzykowskiAbstract:Admission control in wireless networks with the WCDMA Radio Interface admits or blocks new calls depending on a current load situation both in the access celi and in neighboring cells. A new cali is rejected if the predicted load exceeds particular thresholds set by Radio network planning. This article presents a new blocking probability calculation method in cellular systems with the WCDMA Radio Interface for the uplink and the downlink directions. The model considers a finite and an infinite source population of users. In the model we use the load factor to estimate whether a new cali can be admitted or blocked. In the proposed calculation method the corresponding value of the load factor in the neighboring celi is based on the Okumura-Hata propagation model. The results of the analytical calculations are com-pared with the results of the simulation experiments, confirming the accuracy of the proposed method. The proposed scheme can be applicable for a cost-effective Radio resource management in 3G mobile networks and can be easily applied to network capacity calculations.
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uplink blocking probability for a cell with wcdma Radio Interface and differently loaded neighbouring cells
Advanced Industrial Conference on Telecommunications, 2005Co-Authors: Maciej Stasiak, Arkadiusz Wisniewski, Piotr ZwierzykowskiAbstract:In this paper a new approach to the uplink blocking probability calculation for a cell with WCDMA Radio Interface and differently loaded neighbouring cells is presented. The method is based on the model of multi-service switching node carrying a mixture of multi-rate traffic streams, including multicast traffic streams. A fixed point methodology has been used in the proposed method The proposed scheme could be utilized for cost-effective Radio resource management in 3G mobile networks.
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Uplink Blocking Probability Calculation for Cellular Systems with WCDMA Radio Interface, Finite Source Population and Differently Loaded Neighbouring Cells
2005 Asia-Pacific Conference on Communications, 2024Co-Authors: Mariusz Glabowski, Maciej Stasiak, Arkadiusz Wisniewski, Piotr ZwierzykowskiAbstract:This paper presents the uplink blocking probability calculation method in cellular systems with WCDMA Radio Interface, finite source population and differently loaded neighbouring cells. The method is based on the model of the full availability group with multi-rate traffic streams. A fixed point methodology has been used in the proposed method. The proposed scheme could be utilized for cost-effective Radio resource management in 3G mobile networks and can be easily applied to network capacity calculations
Erik Dahlman - One of the best experts on this subject based on the ideXlab platform.
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NR: The New 5G Radio Access Technology
IEEE Communications Standards Magazine, 2017Co-Authors: Stefan Parkvall, Anders Furuskar, Erik Dahlman, Mattias FrenneAbstract:This article provides an overview of the technology components and capabilities of the New Radio (NR) Radio Interface standard currently under development by 3GPP. NR will enable new use cases, requiring further enhanced data rates, latency, coverage, capacity, and reliability. This needs to be accomplished with improved network energy performance and the ability to exploit spectrum in very high frequency bands. Key technology components to reach these targets include flexible numerology, latency-optimized frame structure, massive MIMO, interworking between high and low frequency bands, and ultra-lean transmissions. Preliminary evaluations indicate that, with these technology components, NR can reach the 5G targets.
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4g lte lte advanced for mobile broadband
2011Co-Authors: Erik Dahlman, Stefan Parkvall, Johan SkoldAbstract:Based on the bestseller "3G Evolution - HSPA and LTE for mobile broadband" and reflecting the ongoing success of LTE throughout the world, this book focuses on LTE with full updates including LTE-Advanced to provide a complete picture of the LTE system. Overview and detailed explanations are given for the latest LTE standards for Radio Interface architecture, the physical layer, access procedures, broadcast, relaying, spectrum and RF characteristics, and system performance. Key technologies presented include multi-carrier transmission, advanced single-carrier transmission, advanced receivers, OFDM, MIMO and adaptive antenna solutions, advanced Radio resource management and protocols, and different Radio network architectures. Their role and use in the context of mobile broadband access in general is explained. Both a high-level overview and more detailed step-by-step explanations of the LTE/LTE-Advanced implementation are given. An overview of other related systems such as GSM/EDGE, HSPA, CDMA2000, and WIMAX is also provided. This book is a 'must-have' resource for engineers and other professionals in the telecommunications industry, working with cellular or wireless broadband technologies, giving an understanding of how to utilize the new technology in order to stay ahead of the competition. The authors of the book all work at Ericsson Research and have been deeply involved in 3G and 4G development and standardisation since the early days of 3G research. They are leading experts in the field and are today still actively contributing to the standardisation of LTE within 3GPP. Includes full details of the latest additions to the LTE Radio Access standards and technologies up to and including 3GPP Release 10Clear explanations of the role of the underlying technologies for LTE, including OFDM and MIMO Full coverage of LTE-Advanced, including LTE carrier aggregation, extended multi-antenna transmission, relaying functionality and heterogeneous deploymentsLTE Radio Interface architecture, physical layer, access procedures, MBMS, RF characteristics and system performance covered in detail
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LTE: the evolution of mobile broadband
IEEE Communications Magazine, 2009Co-Authors: David Astely, Anders Furuskar, Magnus Lindström, Ylva Jading, Erik Dahlman, Stefan ParkvallAbstract:This article provides an overview of the LTE Radio Interface, recently approved by the 3GPP, together with a more in-depth description of its features such as spectrum flexibility, multi-antenna transmission, and inter-cell interference control. The performance of LTE and some of its key features is illustrated with simulation results. The article is concluded with an outlook into the future evolution of LTE.
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wcdma the Radio Interface for future mobile multimedia communications
IEEE Transactions on Vehicular Technology, 1998Co-Authors: Erik Dahlman, Per Beming, J Knutsson, F Ovesjo, Magnus Persson, C RoobolAbstract:This paper presents the wide-band code-division multiple-access (WCDMA) Radio Interface chosen by the ETSI as the basic Radio-access technology for the universal mobile telecommunications system (UMTS). A detailed description of the physical layer of ETSI WCDMA is given together with an overview UMTS of the higher layers of the WCDMA Radio Interface. Finally, the WCDMA performance, based on results from the ETSI evaluation of UMTS Radio Interface candidates, is presented.
Stefan Parkvall - One of the best experts on this subject based on the ideXlab platform.
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NR: The New 5G Radio Access Technology
IEEE Communications Standards Magazine, 2017Co-Authors: Stefan Parkvall, Anders Furuskar, Erik Dahlman, Mattias FrenneAbstract:This article provides an overview of the technology components and capabilities of the New Radio (NR) Radio Interface standard currently under development by 3GPP. NR will enable new use cases, requiring further enhanced data rates, latency, coverage, capacity, and reliability. This needs to be accomplished with improved network energy performance and the ability to exploit spectrum in very high frequency bands. Key technology components to reach these targets include flexible numerology, latency-optimized frame structure, massive MIMO, interworking between high and low frequency bands, and ultra-lean transmissions. Preliminary evaluations indicate that, with these technology components, NR can reach the 5G targets.
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4g lte lte advanced for mobile broadband
2011Co-Authors: Erik Dahlman, Stefan Parkvall, Johan SkoldAbstract:Based on the bestseller "3G Evolution - HSPA and LTE for mobile broadband" and reflecting the ongoing success of LTE throughout the world, this book focuses on LTE with full updates including LTE-Advanced to provide a complete picture of the LTE system. Overview and detailed explanations are given for the latest LTE standards for Radio Interface architecture, the physical layer, access procedures, broadcast, relaying, spectrum and RF characteristics, and system performance. Key technologies presented include multi-carrier transmission, advanced single-carrier transmission, advanced receivers, OFDM, MIMO and adaptive antenna solutions, advanced Radio resource management and protocols, and different Radio network architectures. Their role and use in the context of mobile broadband access in general is explained. Both a high-level overview and more detailed step-by-step explanations of the LTE/LTE-Advanced implementation are given. An overview of other related systems such as GSM/EDGE, HSPA, CDMA2000, and WIMAX is also provided. This book is a 'must-have' resource for engineers and other professionals in the telecommunications industry, working with cellular or wireless broadband technologies, giving an understanding of how to utilize the new technology in order to stay ahead of the competition. The authors of the book all work at Ericsson Research and have been deeply involved in 3G and 4G development and standardisation since the early days of 3G research. They are leading experts in the field and are today still actively contributing to the standardisation of LTE within 3GPP. Includes full details of the latest additions to the LTE Radio Access standards and technologies up to and including 3GPP Release 10Clear explanations of the role of the underlying technologies for LTE, including OFDM and MIMO Full coverage of LTE-Advanced, including LTE carrier aggregation, extended multi-antenna transmission, relaying functionality and heterogeneous deploymentsLTE Radio Interface architecture, physical layer, access procedures, MBMS, RF characteristics and system performance covered in detail
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LTE: the evolution of mobile broadband
IEEE Communications Magazine, 2009Co-Authors: David Astely, Anders Furuskar, Magnus Lindström, Ylva Jading, Erik Dahlman, Stefan ParkvallAbstract:This article provides an overview of the LTE Radio Interface, recently approved by the 3GPP, together with a more in-depth description of its features such as spectrum flexibility, multi-antenna transmission, and inter-cell interference control. The performance of LTE and some of its key features is illustrated with simulation results. The article is concluded with an outlook into the future evolution of LTE.
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the 3g long term evolution Radio Interface concepts and performance evaluation
Vehicular Technology Conference, 2006Co-Authors: Hannes Ekstrom, Anders Furuskar, Ylva Jading, Jonas Karlsson, Magnus Lundevall, Stefan ParkvallAbstract:3GPP is in the process of defining the long-term evolution (LTE) for 3G Radio access, sometimes referred to as Super-3G, in order to maintain the future competitiveness of 3G technology. The main targets for this evolution concern increased data rates, improved spectrum efficiency, improved coverage, and reduced latency. Taken together these result in significantly improved service provisioning and reduced operator costs in a variety of traffic scenarios. This paper gives an overview of the basic Radio Interface principles for the 3G long-term evolution concept, including OFDM and advanced antenna solution, and presents performance results indicating to what extent the requirements/targets can be met. It is seen that the targets on three-fold user throughput and spectrum efficiency compared to basic WCDMA can be fulfilled with the current working assumptions. More advanced WCDMA systems, employing e.g. advanced antenna solutions may however achieve similar performance gains. Enhancements for reduced latency and IP optimized architectures and protocols are further applicable to both LTE and WCDMA.
Mikko Valkama - One of the best experts on this subject based on the ideXlab platform.
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dense small cell networks rethinking the Radio Interface beyond lte advanced
1st International Conference on 5G for Ubiquitous Connectivity, 2014Co-Authors: Toni A Levanen, Juho Pirskanen, Mikko ValkamaAbstract:In this article, we provide an overview of the 5GETLA Radio Interface proposal for low latency dense small-cell networks. We discuss the new physical layer parametrization and frame design to support high energy and spectral efficiency in wireless small-cell communications and compare the main parameters with another recent physical layer design proposed for 5G centimeter wave communications. The challenges and potential of the design proposals are opened and discussed. The main emphasis in these designs is to go beyond LTE-Advanced to achieve 5G design targets, while leaving room for further innovations.
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Radio Interface Evolution Towards 5G and Enhanced Local Area Communications
2014Co-Authors: Toni A Levanen, Juho Pirskanen, Jukka Talvitie, Timo Koskela, Mikko ValkamaAbstract:The exponential growth of mobile data in macronetworks has driven the evolution of communications systems toward spectrally efficient, energy efficient, and fast local area communications. It is a well-known fact that the best way to increase capacity in a unit area is to introduce smaller cells. Local area communications are currently mainly driven by the IEEE 802.11 WLAN family being cheap and energy efficient with a low number of users per access point. For the future high user density scenarios, following the 802.11 HEW study group, the 802.11ax project has been initiated to improve the WLAN system performance. The 3GPP LTE-advanced (LTE-A) also includes new methods for pico and femto cell's interference management functionalities for small cell communications. The main problem with LTE-A is, however, that the physical layer numerology is still optimized for macrocells and not for local area communications. Furthermore, the overall complexity and the overheads of the control plane and reference symbols are too large for spectrally and energy efficient local area communications. In this paper, we provide first an overview of WLAN 802.11ac and LTE/LTE-A, discuss the pros and cons of both technology areas, and then derive a new flexible TDD-based Radio Interface parametrization for 5G local area communications combining the best practices of both WiFi and LTE-A technologies. We justify the system design based on local area propagation characteristics and expected traffic distributions and derive targets for future local area concepts. We concentrate on initial physical layer design and discuss how it maps to higher layer improvements. This paper shows that the new design can significantly reduce the latency of the system, and offer increased sleeping opportunities on both base station and user equipment sides leading to enhanced power savings. In addition, through careful design of the control overhead, we are able to improve the channel utilization when compared- with LTE-A.
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Radio Interface design for ultra-low latency millimeter-wave communications in 5G Era
Globecom Workshops (GC Wkshps), 2014, 2014Co-Authors: Toni A Levanen, Juho Pirskanen, Mikko ValkamaAbstract:The projected growth of mobile data traffic requires the 5G wireless systems to support at least 1000 x larger area throughput than the existing 4G solutions. This requires ultra-dense local area networks combined with millimeter-wave communications to provide high spatial multiplexing gain and wide bandwidths for multi-gigabit peak data rates. In this paper, we extend our 5GETLA reference design for 5G small cell network Radio Interface in 3-10 GHz carrier frequencies towards millimeter-wave communications and discuss separate solutions for both line-of-sight and non-line-of-sight scenarios. The non-line-of-sight frame design achieves frame duration equal to 0.1 ms which is one hundredth of the LTE frame duration. The line-of-sight design is also considered as a good candidate especially for small-distance indoor wireless access or inband backhaul and is particularly optimized in terms of ultra-low latency with frame duration equal to 0.05 ms, achieving the strictest physical layer latency requirements set for 5G communications.
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Low latency Radio Interface for 5G flexible TDD local area communications
2014 IEEE International Conference on Communications Workshops, ICC 2014, 2014Co-Authors: Toni A Levanen, Juho Pirskanen, Jukka Talvitie, Timo Koskela, Mikko ValkamaAbstract:This paper presents a low latency Radio Interface design for future 5G local area communications that provides transmission latencies less than 1 ms while providing sufficient spectral efficiency. We concentrate on the excellent latency aspects of the proposed 5GETLA Radio Interface and discuss the factors leading to very low latency and high energy efficiency. In addition, we study two different Radio Interface parameterizations and compare their total overheads and achievable transmission times.
