Pub Date : 2017-06-01DOI: 10.1109/EuCNC.2017.7980684
C. Paoloni, F. Magne, F. André, X. Begaud, V. Krozer, Marc Marilier, A. Ramírez, Jose Raimundo Ruiz Carrasco, R. Vilar, R. Zimmerman
Point to multipoint (PmP) distribution at millimeter wave is a frontier so far not yet crossed due to the formidable technological challenge that the high atmospheric attenuation poses. The transmission power at level of tens of Watts required at millimeter wave for a reference range of 1 km is not available by any commercial or laboratory solid state devices. However, the availability of PmP with multigigabit data rate is pivotal for the new high density small cell networks for 4G and 5G and to solve the digital divide in areas where fiber is not convenient or possible to be deployed. In this paper, the advancements of the novel approach proposed by the EU Horizon 2020 TWEETHER project to create the first and fastest outdoor W-band (92 – 95 GHz) PmP wireless network are described. For the first time a new generation W-band traveling wave tube high power amplifier is introduced in the transmission hub to provide the enabling power for a wide area distribution.
{"title":"TWEETHER future generation W-band backhaul and access network technology","authors":"C. Paoloni, F. Magne, F. André, X. Begaud, V. Krozer, Marc Marilier, A. Ramírez, Jose Raimundo Ruiz Carrasco, R. Vilar, R. Zimmerman","doi":"10.1109/EuCNC.2017.7980684","DOIUrl":"https://doi.org/10.1109/EuCNC.2017.7980684","url":null,"abstract":"Point to multipoint (PmP) distribution at millimeter wave is a frontier so far not yet crossed due to the formidable technological challenge that the high atmospheric attenuation poses. The transmission power at level of tens of Watts required at millimeter wave for a reference range of 1 km is not available by any commercial or laboratory solid state devices. However, the availability of PmP with multigigabit data rate is pivotal for the new high density small cell networks for 4G and 5G and to solve the digital divide in areas where fiber is not convenient or possible to be deployed. In this paper, the advancements of the novel approach proposed by the EU Horizon 2020 TWEETHER project to create the first and fastest outdoor W-band (92 – 95 GHz) PmP wireless network are described. For the first time a new generation W-band traveling wave tube high power amplifier is introduced in the transmission hub to provide the enabling power for a wide area distribution.","PeriodicalId":6626,"journal":{"name":"2017 European Conference on Networks and Communications (EuCNC)","volume":"144 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74732437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-06-01DOI: 10.1109/EuCNC.2017.7980769
N. Makris, A. Samaras, Virgilios Passas, T. Korakis, L. Tassiulas
The exponential growth in mobile services demand, along with the scarce licensed spectrum in the sub-6GHz bands, mandate the exploitation of bands other than the traditionally used by mobile broadband technologies. An example of such operation is the opportunistic access of the unlicensed bands by the LTE technology, as a means to increase the delivered end-user capacity and enhancing the overall quality of experience. In this paper, we present some extensive testbed measurements used for modeling the coexistence of LTE and WiFi technologies when operating within the same unlicensed environment. The experiments deal with different bandwidth settings for both the WiFi and LTE technologies, when LTE is operating closely or inside the primary or secondary channels of IEEE 802.11, taking into account the different threshold values for the Clear Channel Assessment functions that WiFi entails. We present exhaustive experimental measurements, collected under a real testbed setup, and present a cognitive algorithm for minimizing the impact of the two technologies to each other.
{"title":"Measuring LTE and WiFi coexistence in Unlicensed spectrum","authors":"N. Makris, A. Samaras, Virgilios Passas, T. Korakis, L. Tassiulas","doi":"10.1109/EuCNC.2017.7980769","DOIUrl":"https://doi.org/10.1109/EuCNC.2017.7980769","url":null,"abstract":"The exponential growth in mobile services demand, along with the scarce licensed spectrum in the sub-6GHz bands, mandate the exploitation of bands other than the traditionally used by mobile broadband technologies. An example of such operation is the opportunistic access of the unlicensed bands by the LTE technology, as a means to increase the delivered end-user capacity and enhancing the overall quality of experience. In this paper, we present some extensive testbed measurements used for modeling the coexistence of LTE and WiFi technologies when operating within the same unlicensed environment. The experiments deal with different bandwidth settings for both the WiFi and LTE technologies, when LTE is operating closely or inside the primary or secondary channels of IEEE 802.11, taking into account the different threshold values for the Clear Channel Assessment functions that WiFi entails. We present exhaustive experimental measurements, collected under a real testbed setup, and present a cognitive algorithm for minimizing the impact of the two technologies to each other.","PeriodicalId":6626,"journal":{"name":"2017 European Conference on Networks and Communications (EuCNC)","volume":"33 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72942333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-06-01DOI: 10.1109/EuCNC.2017.7980657
Shireesh Bhat, Robinson Udechukwu, R. Dutta, G. Rouskas
Network service composition provided as a service in an Open Marketplace enables users to obtain customized end-to-end composed service(s) using the services advertised by the providers in the marketplace. By providing a semantic language for advertising services and offering choice for the composed service(s) we provide a level playing field for the providers and alternatives for the users to choose from based on their requirement. This is similar to the services offered in the cloud, but without the provider monopoly or the limitation of having to select from limited options.
{"title":"On service composition algorithm for Open Marketplaces of network services","authors":"Shireesh Bhat, Robinson Udechukwu, R. Dutta, G. Rouskas","doi":"10.1109/EuCNC.2017.7980657","DOIUrl":"https://doi.org/10.1109/EuCNC.2017.7980657","url":null,"abstract":"Network service composition provided as a service in an Open Marketplace enables users to obtain customized end-to-end composed service(s) using the services advertised by the providers in the marketplace. By providing a semantic language for advertising services and offering choice for the composed service(s) we provide a level playing field for the providers and alternatives for the users to choose from based on their requirement. This is similar to the services offered in the cloud, but without the provider monopoly or the limitation of having to select from limited options.","PeriodicalId":6626,"journal":{"name":"2017 European Conference on Networks and Communications (EuCNC)","volume":"33 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73315443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-06-01DOI: 10.1109/EuCNC.2017.7980759
Theoni Magounaki, F. Kaltenberger, Xiwen Jiang, Cyril Buey, P. Ratajczak, F. Ferrero
We study the transmit time reversal beamforming in a 8x1 MISO communication system at 2.68GHz. We consider the downlink time reversal transmission where a BS communicates with one user. A prototype composed by 8 antennas and designed by Orange labs acts as the BS while the user has a single antenna. The reciprocity property is destroyed by the non-symmetric characteristics of the RF electronic circuitry. We use relative calibration which is based exclusively on signal processing techniques to solve this issue. Utilizing a controlled test setup based on OpenAirInterface, the ExpressMIMO2 SDR boards, as well as a servo controlled rail, we show the feasibility of a relative calibration method through beamforming SNR measurements. We also evaluate the performance of an antenna selection scheme at the transmit side as a low-cost low-complexity alternative to capture many of the advantages of multi-antenna systems. The measurements show that the relative calibration method is performing almost optimal and that the complexity can be significantly reduced by using antenna selection.
{"title":"Experimental evaluation of relative calibration in a MISO-TDD system","authors":"Theoni Magounaki, F. Kaltenberger, Xiwen Jiang, Cyril Buey, P. Ratajczak, F. Ferrero","doi":"10.1109/EuCNC.2017.7980759","DOIUrl":"https://doi.org/10.1109/EuCNC.2017.7980759","url":null,"abstract":"We study the transmit time reversal beamforming in a 8x1 MISO communication system at 2.68GHz. We consider the downlink time reversal transmission where a BS communicates with one user. A prototype composed by 8 antennas and designed by Orange labs acts as the BS while the user has a single antenna. The reciprocity property is destroyed by the non-symmetric characteristics of the RF electronic circuitry. We use relative calibration which is based exclusively on signal processing techniques to solve this issue. Utilizing a controlled test setup based on OpenAirInterface, the ExpressMIMO2 SDR boards, as well as a servo controlled rail, we show the feasibility of a relative calibration method through beamforming SNR measurements. We also evaluate the performance of an antenna selection scheme at the transmit side as a low-cost low-complexity alternative to capture many of the advantages of multi-antenna systems. The measurements show that the relative calibration method is performing almost optimal and that the complexity can be significantly reduced by using antenna selection.","PeriodicalId":6626,"journal":{"name":"2017 European Conference on Networks and Communications (EuCNC)","volume":"5 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81529931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-06-01DOI: 10.1109/EuCNC.2017.7980761
Janne Janhunen, Konstantin Mikhaylov, J. Petäjäjärvi
The distributed measurement and control systems employing wireless connectivity are commonly seen as the key enablers for many novel industry, retail and consumer applications. Even though, the fast spread of large wireless sensor networks today is obstructed by the absence of solutions, which are at the same time dependable, and can minimize both capital and operational expenditures. In this respect the devices, which are powered with the energy collected from their environment, look very attractive. Among all of them, the systems collecting the energy from a designated wireless (i.e., radio frequency (RF)) channel can often enjoy a more stable energy income, which makes them more dependable than their counterparts. Due to this reason, in the current paper we focus on and discuss the key techniques and design aspects enabling development of a real-life RF-powered wireless sensor device. Namely, we address the problems of designing an antenna and the energy harvesting circuit with feasible efficiency. In addition, we detail particular aspects related to the design of a sensor node and optimizing its computing and communication. The developed device is tested in harsh environment as a part of a fast rotating mechanical structure, showing the feasibility of the proposed solutions. The technology discussed in the paper is an important part of the upcoming 5G and IoT development and deployment.
{"title":"Experimental RF-signal based wireless energy transmission","authors":"Janne Janhunen, Konstantin Mikhaylov, J. Petäjäjärvi","doi":"10.1109/EuCNC.2017.7980761","DOIUrl":"https://doi.org/10.1109/EuCNC.2017.7980761","url":null,"abstract":"The distributed measurement and control systems employing wireless connectivity are commonly seen as the key enablers for many novel industry, retail and consumer applications. Even though, the fast spread of large wireless sensor networks today is obstructed by the absence of solutions, which are at the same time dependable, and can minimize both capital and operational expenditures. In this respect the devices, which are powered with the energy collected from their environment, look very attractive. Among all of them, the systems collecting the energy from a designated wireless (i.e., radio frequency (RF)) channel can often enjoy a more stable energy income, which makes them more dependable than their counterparts. Due to this reason, in the current paper we focus on and discuss the key techniques and design aspects enabling development of a real-life RF-powered wireless sensor device. Namely, we address the problems of designing an antenna and the energy harvesting circuit with feasible efficiency. In addition, we detail particular aspects related to the design of a sensor node and optimizing its computing and communication. The developed device is tested in harsh environment as a part of a fast rotating mechanical structure, showing the feasibility of the proposed solutions. The technology discussed in the paper is an important part of the upcoming 5G and IoT development and deployment.","PeriodicalId":6626,"journal":{"name":"2017 European Conference on Networks and Communications (EuCNC)","volume":"37 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90770356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-06-01DOI: 10.1109/EuCNC.2017.7980691
S. Shahabuddin, O. Silvén, M. Juntti
This paper presents an application-specific instruction-set processor (ASIP) for multiuser multiple-input multiple-output (MU-MIMO) broadcast precoding. The ASIP is designed for a base station (BS) with four antennas to perform user scheduling and precoding. Transport triggered architecture (TTA) is used as the processor template and high level language is used to program the ASIP. Several special function units (SFU) are designed to accelerate norm-based greedy user scheduling and minimum-mean square error (MMSE) precoding. We also program zero forcing dirty paper coding (ZF-DPC) to demonstrate the reusability of the ASIP. A single core provides a throughput of 52.17 Mbps for MMSE precoding and takes an area of 87.53 kgates at 200 MHz on 90 nm technology.
{"title":"ASIP design for multiuser MIMO broadcast precoding","authors":"S. Shahabuddin, O. Silvén, M. Juntti","doi":"10.1109/EuCNC.2017.7980691","DOIUrl":"https://doi.org/10.1109/EuCNC.2017.7980691","url":null,"abstract":"This paper presents an application-specific instruction-set processor (ASIP) for multiuser multiple-input multiple-output (MU-MIMO) broadcast precoding. The ASIP is designed for a base station (BS) with four antennas to perform user scheduling and precoding. Transport triggered architecture (TTA) is used as the processor template and high level language is used to program the ASIP. Several special function units (SFU) are designed to accelerate norm-based greedy user scheduling and minimum-mean square error (MMSE) precoding. We also program zero forcing dirty paper coding (ZF-DPC) to demonstrate the reusability of the ASIP. A single core provides a throughput of 52.17 Mbps for MMSE precoding and takes an area of 87.53 kgates at 200 MHz on 90 nm technology.","PeriodicalId":6626,"journal":{"name":"2017 European Conference on Networks and Communications (EuCNC)","volume":"18 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89967676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-06-01DOI: 10.1109/EuCNC.2017.7980699
L. Combi, U. Spagnolini
In this paper we consider a centralized radio access network (C-RAN) architecture with a fully analog fronthaul link between remote antenna units (RAUs) and baseband units (BBUs) based on the radio over fiber (RoF) paradigm. Beamforming to separate uplink signals received from a pool of users is splitted between RAU and BBU. Optical beamforming is performed at the RAU site with the aim of reducing the number of fronthaul channels and the corresponding analog/digital converters at the BBU, as mandatory for millimeter wave (mmWave) radio communication. Digital baseband processing completes the beamforming at the BBU and compensates for optical beamforming imperfections. In this paper the minimum mean square error (MMSE) beamforming is considered, paired with all-analog fronthauling for the uplink. Spatial sparsity of the mmWave channel is leveraged for fronthaul compression through phase-only approximation of the dominant eigenvectors of the channel. Validation is on the radio-link capabilities employing multiple antennas to meet the demand for massive MIMO technology.
{"title":"Hybrid beamforming in RoF fronthauling for millimeter-wave radio","authors":"L. Combi, U. Spagnolini","doi":"10.1109/EuCNC.2017.7980699","DOIUrl":"https://doi.org/10.1109/EuCNC.2017.7980699","url":null,"abstract":"In this paper we consider a centralized radio access network (C-RAN) architecture with a fully analog fronthaul link between remote antenna units (RAUs) and baseband units (BBUs) based on the radio over fiber (RoF) paradigm. Beamforming to separate uplink signals received from a pool of users is splitted between RAU and BBU. Optical beamforming is performed at the RAU site with the aim of reducing the number of fronthaul channels and the corresponding analog/digital converters at the BBU, as mandatory for millimeter wave (mmWave) radio communication. Digital baseband processing completes the beamforming at the BBU and compensates for optical beamforming imperfections. In this paper the minimum mean square error (MMSE) beamforming is considered, paired with all-analog fronthauling for the uplink. Spatial sparsity of the mmWave channel is leveraged for fronthaul compression through phase-only approximation of the dominant eigenvectors of the channel. Validation is on the radio-link capabilities employing multiple antennas to meet the demand for massive MIMO technology.","PeriodicalId":6626,"journal":{"name":"2017 European Conference on Networks and Communications (EuCNC)","volume":"69 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86418982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-06-01DOI: 10.1109/EuCNC.2017.7980708
Endrit Dosti, M. Shehab, H. Alves, M. Latva-aho
In this paper, we suggest a power allocation strategy for the Chase Combining Hybrid Automatic Repeat Request (CC-HARQ) protocol with ultra-reliability constraints. The proposed optimal power allocation scheme would allow us to reach any outage probability target in the finite block-length regime. We cast an optimization problem as minimization of the average transmitted power under a given outage probability and maximum transmit power constraint. To solve the problem and attain the closed form solution, we utilize the Karush-Kuhn-Tucker (KKT) conditions. We show that in the finite block-length regime the transmitted power is highly dependent on the number of channel uses. However, as the block size increases, the transmitted power becomes constant. Furthermore, we show that by using the proposed power allocation scheme, we can achieve very large average and sum power gains when compared to the one shot transmission.
{"title":"Ultra reliable communication via CC-HARQ in finite block-length","authors":"Endrit Dosti, M. Shehab, H. Alves, M. Latva-aho","doi":"10.1109/EuCNC.2017.7980708","DOIUrl":"https://doi.org/10.1109/EuCNC.2017.7980708","url":null,"abstract":"In this paper, we suggest a power allocation strategy for the Chase Combining Hybrid Automatic Repeat Request (CC-HARQ) protocol with ultra-reliability constraints. The proposed optimal power allocation scheme would allow us to reach any outage probability target in the finite block-length regime. We cast an optimization problem as minimization of the average transmitted power under a given outage probability and maximum transmit power constraint. To solve the problem and attain the closed form solution, we utilize the Karush-Kuhn-Tucker (KKT) conditions. We show that in the finite block-length regime the transmitted power is highly dependent on the number of channel uses. However, as the block size increases, the transmitted power becomes constant. Furthermore, we show that by using the proposed power allocation scheme, we can achieve very large average and sum power gains when compared to the one shot transmission.","PeriodicalId":6626,"journal":{"name":"2017 European Conference on Networks and Communications (EuCNC)","volume":"64 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91110560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-06-01DOI: 10.1109/EuCNC.2017.7980646
M. Minakshi, Pratool Bharti, S. Chellappan
Mosquito borne diseases have been amongst the most important healthcare concerns since time. An important component in combating the spread of infections in any geographic region of interest has been to identify the type of species that are prevalent in that region. As of today, dedicated personnel are assigned in most (if not all nations) to trap samples and identify them. Unfortunately, the process of identifying the actual species of mosquito is currently a manual process requiring highly trained personnel to visually inspect each specimen one by one under a microscope to make the identification. In this paper, we propose a system to automate this process. Specifically, we demonstrate results of an experiment we conducted where learning algorithms were designed to process images of captured mosquito samples taken via a smart-phone camera in order to identify the actual species. Using a total sample size of 60 images that included 7 species collected by the Hillsborough County Mosquito and Aquatic Weed Control Unit (in the city of Tampa) our proposed technique using Random Forests achieved an overall accuracy of 83:3% in correctly identifying the species of mosquito with good precision and recall. While our proposed technique will greatly benefit the state-of-the-art in species identification, we also believe that common citizens can also use our proposed system to improve existing mosquito control programs across the globe.
{"title":"Identifying mosquito species using smart-phone cameras","authors":"M. Minakshi, Pratool Bharti, S. Chellappan","doi":"10.1109/EuCNC.2017.7980646","DOIUrl":"https://doi.org/10.1109/EuCNC.2017.7980646","url":null,"abstract":"Mosquito borne diseases have been amongst the most important healthcare concerns since time. An important component in combating the spread of infections in any geographic region of interest has been to identify the type of species that are prevalent in that region. As of today, dedicated personnel are assigned in most (if not all nations) to trap samples and identify them. Unfortunately, the process of identifying the actual species of mosquito is currently a manual process requiring highly trained personnel to visually inspect each specimen one by one under a microscope to make the identification. In this paper, we propose a system to automate this process. Specifically, we demonstrate results of an experiment we conducted where learning algorithms were designed to process images of captured mosquito samples taken via a smart-phone camera in order to identify the actual species. Using a total sample size of 60 images that included 7 species collected by the Hillsborough County Mosquito and Aquatic Weed Control Unit (in the city of Tampa) our proposed technique using Random Forests achieved an overall accuracy of 83:3% in correctly identifying the species of mosquito with good precision and recall. While our proposed technique will greatly benefit the state-of-the-art in species identification, we also believe that common citizens can also use our proposed system to improve existing mosquito control programs across the globe.","PeriodicalId":6626,"journal":{"name":"2017 European Conference on Networks and Communications (EuCNC)","volume":"55 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81367728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-06-01DOI: 10.1109/EuCNC.2017.7980756
K. Hiltunen, A. Simonsson, Peter Ökvist, B. Halvarsson
The downlink coverage of a 5G trial system operating within the 15 GHz frequency band is evaluated in this paper with the help of drive test measurements. Key 5G features, such as beamforming, beam tracking and multi-point transmission have been utilized during the measurements. The results indicate that multi-point transmission provides a clear improvement to the downlink coverage. Received signal strength is improved due to the macro diversity offered by the utilization of multiple transmission points. Furthermore, distributed MIMO, i.e. the possibility for the user equipment (UE) to simultaneously receive independent data streams from multiple transmission points, results in large improvements in the average rank values. This is the case in particular for the locations in between the transmission points, where the UE has sufficiently good links towards the serving nodes. Finally, as a result of both the improved signal strength and higher rank values, the average downlink throughput is improved by 33–46% (whole area) or 39–42% (busy square). All in all, the trial system is able to maintain a very high downlink throughput, varying from 4 to 13 Gbps, towards a UE moving within the busy square, which demonstrates the benefit of seamless mobility between the different beams and transmission points.
{"title":"5G trial system coverage evaluation utilizing multi-point transmission in 15 GHz frequency band","authors":"K. Hiltunen, A. Simonsson, Peter Ökvist, B. Halvarsson","doi":"10.1109/EuCNC.2017.7980756","DOIUrl":"https://doi.org/10.1109/EuCNC.2017.7980756","url":null,"abstract":"The downlink coverage of a 5G trial system operating within the 15 GHz frequency band is evaluated in this paper with the help of drive test measurements. Key 5G features, such as beamforming, beam tracking and multi-point transmission have been utilized during the measurements. The results indicate that multi-point transmission provides a clear improvement to the downlink coverage. Received signal strength is improved due to the macro diversity offered by the utilization of multiple transmission points. Furthermore, distributed MIMO, i.e. the possibility for the user equipment (UE) to simultaneously receive independent data streams from multiple transmission points, results in large improvements in the average rank values. This is the case in particular for the locations in between the transmission points, where the UE has sufficiently good links towards the serving nodes. Finally, as a result of both the improved signal strength and higher rank values, the average downlink throughput is improved by 33–46% (whole area) or 39–42% (busy square). All in all, the trial system is able to maintain a very high downlink throughput, varying from 4 to 13 Gbps, towards a UE moving within the busy square, which demonstrates the benefit of seamless mobility between the different beams and transmission points.","PeriodicalId":6626,"journal":{"name":"2017 European Conference on Networks and Communications (EuCNC)","volume":"100 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73935555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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