Jani Saloranta
University of Oulu, Centre for wireless communications, Graduate Student
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This white paper explores future localization and sensing opportunities for beyond 5G wireless communication systems by identifying key technology enablers and discussing their underlying challenges, implementation issues, and identifying... more
This white paper explores future localization and sensing opportunities for beyond 5G wireless communication systems by identifying key technology enablers and discussing their underlying challenges, implementation issues, and identifying potential solutions. In addition, we present exciting new opportunities for localization and sensing applications, which will disrupt traditional design principles and revolutionize the way we live, interact with our environment, and do business. Following the trend initiated in the 5G NR systems, 6G will continue to develop towards even higher frequency ranges, wider bandwidths, and massive antenna arrays. In turn, this will enable sensing solutions with very fine range, Doppler and angular resolutions, as well as localization to cm-level degree of accuracy. Moreover, new materials, device types, and reconfigurable surfaces will allow network operators to reshape and control the electromagnetic response of the environment. At the same time, machin...
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In this paper, we develop a collaborative positioning mechanism which uses Bayesian probabilistic models to combine multidimensional sensory data and localize target nodes over the network deployment area. Herein, heterogeneous anchor... more
In this paper, we develop a collaborative positioning mechanism which uses Bayesian probabilistic models to combine multidimensional sensory data and localize target nodes over the network deployment area. Herein, heterogeneous anchor nodes with distinct radio access technologies and experiencing various radio channel features implement a joint sensor fusion and positioning system for industry verticals. The proposed mechanism also relies on a modern network architecture whereby devices offload high-demand computation to more capable edge servers which then estimate the target node position after gathering anchors measurements and prior history. Kernel density estimation results are used to show that edge servers implementing Bayesian-based sensor fusion and positioning system effectively estimate the target node location when using hybrid metrics and combining past and current sensory inputs.
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In this paper the impact of ultra wideband (UWB) interference on IEEE802.11b WLAN performance is studied through experimental tests. Extremely high power UWB transmitters, that are not FCC compliant, were used in the tests to simulate the... more
In this paper the impact of ultra wideband (UWB) interference on IEEE802.11b WLAN performance is studied through experimental tests. Extremely high power UWB transmitters, that are not FCC compliant, were used in the tests to simulate the impact of very high UWB device concentration. The measurement setup was organized to allow the UWB transmitters to generate as much interference to the WLAN network as possible. Configurations were examined with various distances between the UWB transmitters and WLAN receiver. Peer-to-peer connection and link via access point were studied in office environment during the regular office hours. The results showed that the UWB population corresponding thousands of FCC compatible devices will decrease the network performance if the interference sources were near the device to be interfered. However, if the interference distance is longer than 50 cm significant decrease in the throughput cannot be seen. In real life, this high UWB population is absurd. ...
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This paper discusses the experimental coexistence study work carried out with ultra wideband (UWB) and IEEE802.1 la wireless local area network (WLAN). The measurement setup followed a realistic interference scenario inside a classroom... more
This paper discusses the experimental coexistence study work carried out with ultra wideband (UWB) and IEEE802.1 la wireless local area network (WLAN). The measurement setup followed a realistic interference scenario inside a classroom where several UWB devices were spread over the room; there was one UWB transmitter for each student position and the desired terminal was moved across the room. Another setup was for aggregate studies where numbers of UWB transmitters were located close to the desired WLAN receiver. In addition, temporary radio interference from the other sources was not controlled during the measurements. The results showed that the performance of a victim link depends mostly on the UWB activity factor and pulse repetition frequency. In short line-of-sight WLAN links, the degradation in measured data rate was typically less than 5% in usable activity factors if measured from uplink site. The corresponding degradation in downlink side is typically 5 10%. In through wa...
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This work proposes and evaluates hierarchical Bayesian-based localization methods to estimate the position of a target node in indoor deployment scenarios. The measurements are acquired through a distributed antenna system which is... more
This work proposes and evaluates hierarchical Bayesian-based localization methods to estimate the position of a target node in indoor deployment scenarios. The measurements are acquired through a distributed antenna system which is connected to a common master anchor node. Each antenna head is affected by different channels parameters, what makes the estimation more difficult. The proposed method combines received signal strength and time of flight measurements to estimate the target location. In our investigations, we also consider a one-level hierarchical Bayesian network model, which introduces conditional interdependencies to the model parameters, resulting in less susceptibility to local variations. The Markov Chain Monte Carlo sampling method is used to approximate the posterior distribution of the two-dimensional target's location coordinates. The root mean square error is used to evaluate the performance of the proposed solution in indoor scenarios. Our results show that by combining hybrid measurements or increasing conditions between the parameters by a hierarchical approach, the proposed mechanisms outperform the classic Bayesian model when estimating the target node using even fewer measurements.
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ABSTRACT New automated solutions are needed, e.g., in mining industry to improve efficiency and productivity of every process. In addition, costs have to be reduced, and health and safety of employees need to be enhanced. This paper... more
ABSTRACT New automated solutions are needed, e.g., in mining industry to improve efficiency and productivity of every process. In addition, costs have to be reduced, and health and safety of employees need to be enhanced. This paper studies vehicle-to-vehicle (V2V) communication to be utilized in, e.g., mining vehicles in a tunnel to increase safety and productivity of a transportation of mining goods. The objective of the paper is to experimentally evaluate maximum achievable range of WiFi radio in a real tunnel environment including line-of-sight (LOS) and non-LOS (NLOS) links. The measurement campaign was carried out in an artificial tunnel using commercial off-the-shelf WiFi radios and antennas. The experimental system was able to reach 150 m range when applying a single data stream, and 100 m for two simultaneous data streams without loss in throughput.
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ABSTRACT Wireless communications are increasingly-often selected as a cable replacement for on-board vehicular networks. When a wireless technology implements safety critical application, cryptographic countermeasures are required. This... more
ABSTRACT Wireless communications are increasingly-often selected as a cable replacement for on-board vehicular networks. When a wireless technology implements safety critical application, cryptographic countermeasures are required. This paper describes the impact of security on intra-vehicular communication in a real tunnel scenario, e.g. for urban transit or mining vehicles where the usage of security is mandatory in order to maintain the system safety. The measurement campaign was carried out in a sport ski-tunnel using commercial off-the-shelf (COTS) Wi-Fi modules. The objective was to understand the impact of overhead on security in a tunnel considering line-of-sight (LOS) and non- LOS (NLOS) scenarios. In addition, the study compared different solutions for security to evaluating lesser known protocols. These field trials showed that wireless security is feasible up to 300 m in NLOS without repeaters. Finally, the experiment presented confirms the effectiveness of the Host Identity Protocol when used as standalone or in combination with other security solution.
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This paper presents the results of a co-existence study investigating the impact of ultra wideband (UWB) interference on an IEEE802.11b network. Results are based on the experimental test measurements made at the University of Oulu,... more
This paper presents the results of a co-existence study investigating the impact of ultra wideband (UWB) interference on an IEEE802.11b network. Results are based on the experimental test measurements made at the University of Oulu, Finland using simple non-FCC compatible, high power UWB transmitters as interference sources. Preliminary results showed that the IEEE802.11b network suffered slightly in the presence of very significant UWB interference. In our study, many high power UWB transmitters have been used in close proximity to the victim system. The cumulative effect of the UWB interference generated in the study corresponds to the interference caused by several hundred of FCC compliant UWB devices. The measured signal-to-noise ratio reported by the victim system showed a degradation of 5.5 dB and 1.5 dB when 20 or 10 UWB transmitters were active, respectively.
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This paper focuses on the exploitation of fifth generation (5G) centimetre-wave (cmWave) and millimetre-wave (mmWave) transmissions for high-accuracy positioning, in order to complement the availability of Global Navigation Satellite... more
This paper focuses on the exploitation of fifth generation (5G) centimetre-wave (cmWave) and millimetre-wave (mmWave) transmissions for high-accuracy positioning, in order to complement the availability of Global Navigation Satellite Systems (GNSS) in harsh environments, such as urban canyons. Our goal is to present a representative methodology to simulate and assess their hybrid positioning capabilities over outdoor urban, suburban and rural scenarios. A novel scenario definition is proposed to integrate the network density of 5G deployments with the visibility masks of GNSS satellites, which helps to generate correlated scenarios of both technologies. Then, a generic and representative modeling of the 5G and GNSS observables is presented for snapshot positioning, which is suitable for standard protocols. The simulations results indicate that GNSS drives the achievable accuracy of its hybridisation with 5G cmWave, because non-line-of-sight (NLoS) conditions can limit the cmWave loc...
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One of the key elements of future 5G and beyond mobile technology is millimeter-wave (mmWave) communications, which is targeted to extreme high-data rate services. Furthermore, combining the possibility of a wideband signal transmission... more
One of the key elements of future 5G and beyond mobile technology is millimeter-wave (mmWave) communications, which is targeted to extreme high-data rate services. Furthermore, combining the possibility of a wideband signal transmission with the capability of pencil-beamforming, mmWave technology is key for accurate cellular-based positioning. However, it is also well-known that at the mmWave frequency band the radio channel is very sensitive to line-of-sight blockages giving rise to unstable connectivity and inefficient communication. In this paper, we tackle the blockage problem and propose a solution to increase the communication reliability by means of a coordinated multi-point reception. We also investigate the advantage of this solution in terms of positioning quality. More specifically, we describe a robust hybrid analog–digital receive beamforming strategy to combat the unavailability of dominant links. Numerical examples are provided to validate the efficiency of our propos...
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... AbstractIn the Wireless Body Area Network (WBAN), ra-dio propagations from devices that are close to or inside the human body are complex and distinctive comparing to the other environments since the human body has a complex shape... more
... AbstractIn the Wireless Body Area Network (WBAN), ra-dio propagations from devices that are close to or inside the human body are complex and distinctive comparing to the other environments since the human body has a complex shape consisting of different tissues. ...
ABSTRACT
Research Interests:
Research Interests:
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New automated solutions are needed, e.g., in mining industry to improve efficiency and productivity of every process. In addition, costs have to be reduced, and health and safety of employees need to be enhanced. This paper studies... more
New automated solutions are needed, e.g., in mining industry to improve efficiency and productivity of every process. In addition, costs have to be reduced, and health and safety of employees need to be enhanced. This paper studies vehicle-to- vehicle (V2V) communication to be utilized in, e.g., mining ve- hicles in a tunnel to increase safety and productivity of a trans- portation of mining goods. The objective of the paper is to expe- rimentally evaluate maximum achievable range of WiFi radio in a real tunnel environment including line-of-sight (LOS) and non- LOS (NLOS) links. The measurement campaign was carried out in an artificial tunnel using commercial off-the-shelf WiFi radios and antennas. The experimental system was able to reach 150 m range when applying a single data stream, and 100 m for two simultaneous data streams without loss in throughput.
Research Interests:
ABSTRACT An experimental evaluation of 802.11g+n based wireless local area network (WLAN) devices with omnidirectional and directive antennas under interference is investigated in this paper. The performance of directive antennas is known... more
ABSTRACT An experimental evaluation of 802.11g+n based wireless local area network (WLAN) devices with omnidirectional and directive antennas under interference is investigated in this paper. The performance of directive antennas is known to be better if the interference signal is coming from the sidelobes' directions. Here we studied the performance difference between directive and omnidirectional antennas when the interference signal is originated between a transmitter and a receiver.
Research Interests:
ABSTRACT
Research Interests:
ABSTRACT Wireless communications are increasingly-often selected as a cable replacement for on-board vehicular networks. When a wireless technology implements safety critical application, cryptographic countermeasures are required. This... more
ABSTRACT Wireless communications are increasingly-often selected as a cable replacement for on-board vehicular networks. When a wireless technology implements safety critical application, cryptographic countermeasures are required. This paper describes the impact of security on intra-vehicular communication in a real tunnel scenario, e.g. for urban transit or mining vehicles where the usage of security is mandatory in order to maintain the system safety. The measurement campaign was carried out in a sport ski-tunnel using commercial off-the-shelf (COTS) Wi-Fi modules. The objective was to understand the impact of overhead on security in a tunnel considering line-of-sight (LOS) and non- LOS (NLOS) scenarios. In addition, the study compared different solutions for security to evaluating lesser known protocols. These field trials showed that wireless security is feasible up to 300 m in NLOS without repeaters. Finally, the experiment presented confirms the effectiveness of the Host Identity Protocol when used as standalone or in combination with other security solution.