Pub Date : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700423
K. Matsumura, J. Hagiwara, T. Nishimura, T. Ohgane, Y. Ogawa, Takanori Sato
Multiple-input multiple-output (MIMO) is a modern wireless transmission technology that can dramatically increase communication speed and capacity. Since the computational complexity of received signal detection increases with the number of antennas, various improvement methods have been investigated. This paper focuses on Markov chain Monte Carlo methods and proposes a new signal detection method based on the Hamiltonian Monte Carlo. The proposed method can improve the signal search efficiency by intentionally expanding the discrete signal detection problem into a continuous-valued one. Simulation results show that the proposed method outperforms the conventional method using the Gibbs sampling method and achieves near-optimal performance, especially when the modulation order and spatial correlations are high, which are generally difficult for signal detection. This result suggests that the proposed method is a promising candidate for a practical MIMO system.
{"title":"A Novel MIMO Signal Detection Method Using Hamiltonian Monte Carlo Approach","authors":"K. Matsumura, J. Hagiwara, T. Nishimura, T. Ohgane, Y. Ogawa, Takanori Sato","doi":"10.1109/wpmc52694.2021.9700423","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700423","url":null,"abstract":"Multiple-input multiple-output (MIMO) is a modern wireless transmission technology that can dramatically increase communication speed and capacity. Since the computational complexity of received signal detection increases with the number of antennas, various improvement methods have been investigated. This paper focuses on Markov chain Monte Carlo methods and proposes a new signal detection method based on the Hamiltonian Monte Carlo. The proposed method can improve the signal search efficiency by intentionally expanding the discrete signal detection problem into a continuous-valued one. Simulation results show that the proposed method outperforms the conventional method using the Gibbs sampling method and achieves near-optimal performance, especially when the modulation order and spatial correlations are high, which are generally difficult for signal detection. This result suggests that the proposed method is a promising candidate for a practical MIMO system.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128227344","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 : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700437
Fumiko Ohori, S. Itaya, Taketoshi Nakajima, Akihiro Amagai, J. Hasegawa, T. Osuga, T. Matsumura
In recent days, various types of wireless communication-based equipment such as Automated Guided Vehicles (AGVs), stacker cranes, and mobile robots have been used to enhance productivity and factory automation. Wireless communication networks are promising for a flexible factory where frequent reconfigurations occur, whereas communication quality, reliability and roaming of wireless links may be the issues for their utilization. This paper shows the experimental results of the function that monitors the communication quality of multiple Access Points (APs) and reduces the communication disconnection time by communicating with appropriate APs through multiple interfaces in a real logistics area. As a result, the packet loss ratio was improved by 21.94% and the average delay time was reduced by about 50-60ms.
{"title":"Performance Evaluation of Wireless Switching for Indoor AGV","authors":"Fumiko Ohori, S. Itaya, Taketoshi Nakajima, Akihiro Amagai, J. Hasegawa, T. Osuga, T. Matsumura","doi":"10.1109/wpmc52694.2021.9700437","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700437","url":null,"abstract":"In recent days, various types of wireless communication-based equipment such as Automated Guided Vehicles (AGVs), stacker cranes, and mobile robots have been used to enhance productivity and factory automation. Wireless communication networks are promising for a flexible factory where frequent reconfigurations occur, whereas communication quality, reliability and roaming of wireless links may be the issues for their utilization. This paper shows the experimental results of the function that monitors the communication quality of multiple Access Points (APs) and reduces the communication disconnection time by communicating with appropriate APs through multiple interfaces in a real logistics area. As a result, the packet loss ratio was improved by 21.94% and the average delay time was reduced by about 50-60ms.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"29 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132467264","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 : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700450
Qingyu Yang, Ding Zhifan
With the increasing popularity of smart grid and fog computing, fog computing-based network privacy is one of the biggest security challenges for data aggregating in smart grid. Many researchers have proposed corresponding solutions. However, in most schemes, a single fog node is responsible for the data aggregation of the smart meter sub-area within its range, which is prone to the risk of single point of failure. To solve the above problems, this paper designed a fog node allocation strategy based on the fog computing smart grid system model containing fog groups. The fog nodes in fog group are allocated by dynamic priority method to reduce the risk of single point failure. Furthermore, a privacy preserving multidimensional data aggregation scheme is proposed, which supports smart meters to report multiple types of data to control center at one time, so as to realize efficient data processing. Security analysis shows that this scheme can better satisfy the security. The performance analysis shows the advantages of this scheme in computation cost.
{"title":"Privacy-Preserving Data Aggregation for Single Point of Failure in Smart Grid","authors":"Qingyu Yang, Ding Zhifan","doi":"10.1109/wpmc52694.2021.9700450","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700450","url":null,"abstract":"With the increasing popularity of smart grid and fog computing, fog computing-based network privacy is one of the biggest security challenges for data aggregating in smart grid. Many researchers have proposed corresponding solutions. However, in most schemes, a single fog node is responsible for the data aggregation of the smart meter sub-area within its range, which is prone to the risk of single point of failure. To solve the above problems, this paper designed a fog node allocation strategy based on the fog computing smart grid system model containing fog groups. The fog nodes in fog group are allocated by dynamic priority method to reduce the risk of single point failure. Furthermore, a privacy preserving multidimensional data aggregation scheme is proposed, which supports smart meters to report multiple types of data to control center at one time, so as to realize efficient data processing. Security analysis shows that this scheme can better satisfy the security. The performance analysis shows the advantages of this scheme in computation cost.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124194191","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 : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700428
Mariko Sekiguchi, A. Miura, Y. Abe, Go Otsuru, E. Morikawa, N. Yoshimura, Takashi Takahashi, T. Kubo-oka, T. Fuse, H. Tsuji, M. Toyoshima
In recent years, the capacity of satellite has been improved by multi-beam technology. For the next-generation high throughput satellite (HTS), further improvements of capacity, flexibilization and digitization are required. In addition, cooperation with terrestrial 5G/Beyond 5G are also required to expand terrestrial network area or to utilize satellites as backup links in case of disaster or to realize completely new applications. We started research and development (R&D) on next-generation HTS which is scheduled for five years from fiscal year 2020 to fiscal year 2024. The development results will be verified by the on-orbit demonstration experiment using Engineering Test Satellite 9. In this paper, we introduce the outline of our R&D. In addition, we focus on one of the study items “satellite-terrestrial cooperation system” and present the concept of a satellite-terrestrial cooperation network simulator which will be used to extract potential issues or to verify some algorithms associated with the satellite-terrestrial cooperation system.
{"title":"A study on Satellite-Terrestrial Cooperation System as a Part of Research and Development of Ka-band Satellite Communication Control for Various Use Cases","authors":"Mariko Sekiguchi, A. Miura, Y. Abe, Go Otsuru, E. Morikawa, N. Yoshimura, Takashi Takahashi, T. Kubo-oka, T. Fuse, H. Tsuji, M. Toyoshima","doi":"10.1109/wpmc52694.2021.9700428","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700428","url":null,"abstract":"In recent years, the capacity of satellite has been improved by multi-beam technology. For the next-generation high throughput satellite (HTS), further improvements of capacity, flexibilization and digitization are required. In addition, cooperation with terrestrial 5G/Beyond 5G are also required to expand terrestrial network area or to utilize satellites as backup links in case of disaster or to realize completely new applications. We started research and development (R&D) on next-generation HTS which is scheduled for five years from fiscal year 2020 to fiscal year 2024. The development results will be verified by the on-orbit demonstration experiment using Engineering Test Satellite 9. In this paper, we introduce the outline of our R&D. In addition, we focus on one of the study items “satellite-terrestrial cooperation system” and present the concept of a satellite-terrestrial cooperation network simulator which will be used to extract potential issues or to verify some algorithms associated with the satellite-terrestrial cooperation system.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116568730","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 : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700414
Kazuki Komatsu, T. Matsumura
Estimation of memoryless nonlinearity is the simplest problem of nonlinearity and one of the most important problems on wireless communications. In some wireless communication fields such as pre-distortion of multiple-input and multiple-output systems, dual-input digital Doherty, and wireless physical layer identification, there is a demand to estimate the nonlinearity of multiple amplifiers simultaneously. In this paper, we presents a novel estimation method of memoryless nonlinearity of multiple amplifiers with low complexity and high stability based on weighted least squares, numerical integration, and good properties of orthonormal systems. While the conventional least-squares method is derived by focusing on the effect of noise added to the output, the proposed method focuses on the error of the polynomial approximation and is derived from the numerical integration of its probability expectation. In addition, we derive the theoretical analysis of the estimation error of the proposed method. The simulation results show that the proposed method achieves better estimation accuracy, higher stability, and lower computational cost than the conventional least squares. Also, the theoretical results and simulation results are consistent with each other.
{"title":"Estimation of Memoryless Nonlinearity of Multiple Amplifiers with Low Complexity and High Stability Based on Orthonormal Systems and Quadrature","authors":"Kazuki Komatsu, T. Matsumura","doi":"10.1109/wpmc52694.2021.9700414","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700414","url":null,"abstract":"Estimation of memoryless nonlinearity is the simplest problem of nonlinearity and one of the most important problems on wireless communications. In some wireless communication fields such as pre-distortion of multiple-input and multiple-output systems, dual-input digital Doherty, and wireless physical layer identification, there is a demand to estimate the nonlinearity of multiple amplifiers simultaneously. In this paper, we presents a novel estimation method of memoryless nonlinearity of multiple amplifiers with low complexity and high stability based on weighted least squares, numerical integration, and good properties of orthonormal systems. While the conventional least-squares method is derived by focusing on the effect of noise added to the output, the proposed method focuses on the error of the polynomial approximation and is derived from the numerical integration of its probability expectation. In addition, we derive the theoretical analysis of the estimation error of the proposed method. The simulation results show that the proposed method achieves better estimation accuracy, higher stability, and lower computational cost than the conventional least squares. Also, the theoretical results and simulation results are consistent with each other.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128376452","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 : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700426
Y. Shoji, K. Nakauchi, Yoshito Watanabe, So Hasegawa, Mikio Hasegawa
This paper overviews the concept of the Piggy-back Network to enable upcoming Beyond 5G society supported by autonomous mobilities, the key technologies, and the prototyping on a service robot platform. The data transfer principle in the Piggy-back Network is based on the store-carry-forwarding (SCF) between cross-industrial autonomous mobilities such as service robots, wheelchairs, vehicles, buses, etc., with autonomous moving capabilities, which are practicing indoor or outdoor in a city or town. It is suggested that three types of technologies; to exploit the proximity time at a maximum, to create or increase the proximity chances, and to manage the distributed proximity chances, should be pursued. It is shown that the Shannon’ s communication capacity theorem is still useful to estimate the channel capacity achieved by a passing wireless communication using an extremely high frequency band by introducing an antenna model suitably. This paper focuses on a technology to enlarge the data volume that can be transferred by the passing communications and proposes to control the mobilities with “Stop/Slow-down & Go” or “Catch-up & Rendezvous” policy. It is demonstrated by prototyping a service robot platform that the mobility control with the “Stop & Go” policy increases the transferable data size with a little time loss.
{"title":"Piggy-back Network to enable Beyond5G Society supported by Autonomous Mobilities: Concept, Key technologies & Prototyping on a Service Robot Platform","authors":"Y. Shoji, K. Nakauchi, Yoshito Watanabe, So Hasegawa, Mikio Hasegawa","doi":"10.1109/wpmc52694.2021.9700426","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700426","url":null,"abstract":"This paper overviews the concept of the Piggy-back Network to enable upcoming Beyond 5G society supported by autonomous mobilities, the key technologies, and the prototyping on a service robot platform. The data transfer principle in the Piggy-back Network is based on the store-carry-forwarding (SCF) between cross-industrial autonomous mobilities such as service robots, wheelchairs, vehicles, buses, etc., with autonomous moving capabilities, which are practicing indoor or outdoor in a city or town. It is suggested that three types of technologies; to exploit the proximity time at a maximum, to create or increase the proximity chances, and to manage the distributed proximity chances, should be pursued. It is shown that the Shannon’ s communication capacity theorem is still useful to estimate the channel capacity achieved by a passing wireless communication using an extremely high frequency band by introducing an antenna model suitably. This paper focuses on a technology to enlarge the data volume that can be transferred by the passing communications and proposes to control the mobilities with “Stop/Slow-down & Go” or “Catch-up & Rendezvous” policy. It is demonstrated by prototyping a service robot platform that the mobility control with the “Stop & Go” policy increases the transferable data size with a little time loss.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127567379","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 : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700463
S. Itaya, Akihiro Amagai, Taketoshi Nakajima, Fumiko Ohori, T. Osuga, T. Matsumura
In recent years, demands for wireless sensing and flexibility of manufacturing environment and systems are increasing and driving an increase in volume and variety of wireless devices in factories. Especially, detection of status and anomaly of systems using sensors is getting a lot of attention in the manufacturing field. In this paper, we introduce two examples in which the state of a manufacturing machine, specifically the wear state of blades in a milling machine, is diagnosed using sensing data which can be collected via a wireless network. It is shown that the volume of data required for reliable diagnosis can be reduced to minimize use of wireless resources by pre-preprocessing of data before sending.
{"title":"Status Monitoring and Diagnostics using Sensing Data in Flexible Factory","authors":"S. Itaya, Akihiro Amagai, Taketoshi Nakajima, Fumiko Ohori, T. Osuga, T. Matsumura","doi":"10.1109/wpmc52694.2021.9700463","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700463","url":null,"abstract":"In recent years, demands for wireless sensing and flexibility of manufacturing environment and systems are increasing and driving an increase in volume and variety of wireless devices in factories. Especially, detection of status and anomaly of systems using sensors is getting a lot of attention in the manufacturing field. In this paper, we introduce two examples in which the state of a manufacturing machine, specifically the wear state of blades in a milling machine, is diagnosed using sensing data which can be collected via a wireless network. It is shown that the volume of data required for reliable diagnosis can be reduced to minimize use of wireless resources by pre-preprocessing of data before sending.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129605255","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 : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700439
Krasimir Tonchev, Ivaylo Bozhilov, Radostina Petkova, V. Poulkov, A. Manolova, P. Lindgren
With the advance of technology, human-to-human long distance communication becomes closer to real life-like experience. Cheap and easy to install 3D sensors, affordable virtual and mixed reality Head-Mounted Displays (HMD) are paving the way towards widespread usage. However, the present development in this direction is still infant and the lack of standards and recommendations are the main obstacle for off the shelf availability of such technology. Considering a specific case study, based on a controlled environment, we define the requirements for Mixed Reality Telepresence System (MRTS), propose the system architecture in terms of hardware and software ones and provide implementation details for each of the its components.
{"title":"Implementation Requirements and System Architecture for Mixed Reality Telepresence Application Scenario","authors":"Krasimir Tonchev, Ivaylo Bozhilov, Radostina Petkova, V. Poulkov, A. Manolova, P. Lindgren","doi":"10.1109/wpmc52694.2021.9700439","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700439","url":null,"abstract":"With the advance of technology, human-to-human long distance communication becomes closer to real life-like experience. Cheap and easy to install 3D sensors, affordable virtual and mixed reality Head-Mounted Displays (HMD) are paving the way towards widespread usage. However, the present development in this direction is still infant and the lack of standards and recommendations are the main obstacle for off the shelf availability of such technology. Considering a specific case study, based on a controlled environment, we define the requirements for Mixed Reality Telepresence System (MRTS), propose the system architecture in terms of hardware and software ones and provide implementation details for each of the its components.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130962724","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 : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700457
R. M. Andrade, R. Paulo, Salomao M. Francisco, Emanuel Teixeira, F. Velez
The characterization of the wireless medium in indoor small cell networks is essential to obtain appropriate modeling of the propagation environment. Universal Software Radio Peripherals (USRPs) and simple dipole antennas can emulate LTE-Advanced networks. In this work, we verify WINNER II propagation modeling for the indoor femtocell environment by considering different classrooms of $7.32 times 7.32$ square meters near a common University Department corridor while measuring the power received in UEs placed in a grid of 49 points (radiated by the small eNodeB in the centre of the classroom of the own cell). These measurements have been carried out either by using the Software Radio Systems LTE that emulates the LTE-Advanced network and its UEs, or by measuring the received power in the UES with a Rohde & Schwarz FSH8 spectrum analyzer. In room 1, by varying the UE position, the highest values of the received power have occurred close to the central BS, and then in the opposite wall, further away from the interferer. Nevertheless, it was verified that the received power does not decrease suddenly because of the effect of the radiation pattern of the BS and UE antennas for large angles of apertures, as well as due to the non-omnidirectional horizontal antenna pattern. In addition, it was demonstrated that there is an effect of “wall loss” proven by the fact that path loss increases between room 2 and room 1 (or between room 3 and 2). If we consider an attenuation for each wall of circa 7-9 dB the behavior of the WINNER II model at 2.625 GHz for the interference coming across different walls is verified.
{"title":"Characterization of Indoor Small Cells Propagation","authors":"R. M. Andrade, R. Paulo, Salomao M. Francisco, Emanuel Teixeira, F. Velez","doi":"10.1109/wpmc52694.2021.9700457","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700457","url":null,"abstract":"The characterization of the wireless medium in indoor small cell networks is essential to obtain appropriate modeling of the propagation environment. Universal Software Radio Peripherals (USRPs) and simple dipole antennas can emulate LTE-Advanced networks. In this work, we verify WINNER II propagation modeling for the indoor femtocell environment by considering different classrooms of $7.32 times 7.32$ square meters near a common University Department corridor while measuring the power received in UEs placed in a grid of 49 points (radiated by the small eNodeB in the centre of the classroom of the own cell). These measurements have been carried out either by using the Software Radio Systems LTE that emulates the LTE-Advanced network and its UEs, or by measuring the received power in the UES with a Rohde & Schwarz FSH8 spectrum analyzer. In room 1, by varying the UE position, the highest values of the received power have occurred close to the central BS, and then in the opposite wall, further away from the interferer. Nevertheless, it was verified that the received power does not decrease suddenly because of the effect of the radiation pattern of the BS and UE antennas for large angles of apertures, as well as due to the non-omnidirectional horizontal antenna pattern. In addition, it was demonstrated that there is an effect of “wall loss” proven by the fact that path loss increases between room 2 and room 1 (or between room 3 and 2). If we consider an attenuation for each wall of circa 7-9 dB the behavior of the WINNER II model at 2.625 GHz for the interference coming across different walls is verified.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133268657","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 : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700451
C. Pyo, H. Sawada, Takeshi Matsumura
This paper introduces a cooperating system of smart personal mobility (SPM) and indoor intelligent infrastructure to remotely monitor SPM and identify indoor conditions for safe indoor automatic mobility. We also introduce dynamic data traffic control, which is a method of changing the camera image resolution on the SPM movement, to manage wireless data traffic with remote monitoring using multiple infrastructures. This paper shows an experimental study of dynamic data traffic control and provides sufficient quality of service for remote monitoring under the limited radio resources.
{"title":"Experimental Study of Dynamic Data Traffic Control for the Cooperating System of Smart Personal Mobility and Indoor Intelligent Infrastructure","authors":"C. Pyo, H. Sawada, Takeshi Matsumura","doi":"10.1109/wpmc52694.2021.9700451","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700451","url":null,"abstract":"This paper introduces a cooperating system of smart personal mobility (SPM) and indoor intelligent infrastructure to remotely monitor SPM and identify indoor conditions for safe indoor automatic mobility. We also introduce dynamic data traffic control, which is a method of changing the camera image resolution on the SPM movement, to manage wireless data traffic with remote monitoring using multiple infrastructures. This paper shows an experimental study of dynamic data traffic control and provides sufficient quality of service for remote monitoring under the limited radio resources.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126633469","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：