Diffusive-DNA-Based Molecular Communication Relay Virtual Reality Networks Nature Environment Monitor Research Using LPWAN Estim

Urban Sensing and Mobility Analysis Ew-601

SEZAKI LAB Urban Sensing and Mobility Analysis Center for Spatial Information Science Information and Communication Engineering

Socio-cultural Environmental Studies http://www.mcl.iis.u-tokyo.ac.jp

Capturing Human Mobility Using Bluetooth Diffusive-DNA-Based Molecular Communication Purpose Modulating Propagation Tx Rx • Developing low-cost method to Signal Carrier sense human mobility using

Bluetooth To Nano Conventional Communication Technologies Scale • Congestion sensing by detecting

Bluetooth devices Higher • Direction detection by observing Diffusion-based Molecular Communication Channel transition of signal strength of Capacity Relationship between number of counted people and number Bluetooth Low Energy beacon of detected Bluetooth device at Makuhari Messe Diffusive-DNA-based Molecular Communication Applications BR/EDR 0.310 • Managing and reducing congestion LE 0.188 DNA Diffusivity BR/EDR+LE 0.303 2- 0.72 DNA Molecule Dmsll = 490µ /× [ (bp)] of indoor facilities r Rx Hit probability • Understanding human mobility in r 1 dr--éù() dr2 Bluetooth beacon Observed received signal strength indication (RSSI) of cc Tx fthit ()= expêú- approaching sensor approaching Bluetooth beacon dc disaster to support evacuation dtcl4p Dtl ëû4 Dt

Understanding Urban Mobility Using Smart Card Data Nature Environment Monitor Research Using LPWAN Grasp the patterns of passengers’ movement in Kotoden by using Non- negative Matrix and Tensor Factorizations (NMF, NTF). A study on the location information

Common of a zone where it is difficult for Common Kotohira Line Nagao Line Shido Line people to step on continuously. Animals do sensing in place of people. Research on location

Kotohira information for natural environment Line monitoring Correlation between distance and signal intensity

Nagao ØClassify the stations into four groups of lines Line without the knowledge of lines. ØMost passengers don’t change to another line.

Shido Line (Changes happen in 8% of the ride.) ØCharacteristic stations such as the closest station to a shopping mole are extracted.

Estimating Reconstruction Accuracy of Data Relay Virtual Reality Networks Perturbation in Mobile Sensing Users in virtual reality (VR) playgrounds wear wireless head mounted displays that CO O3 Data Perturbation use millimeter wave technology for

• A technique to protect privacy by Error Error communication. Reachability is

randomizing observed sensor values 0.00 0.15 0.30 10 20 30 40 50 0.00 0.15 0.30 10 20 30 40 50 α α significantly improved when these VR by each user before sending to a NO2 PM2.5 headsets are equipped with relaying server. The server restore only capability. We proposed stable and fair Error Error statistical information from a algorithms for relaying between users and 0.00 0.15 0.30 10 20 30 40 50 0.00 0.15 0.30 10 20 30 40 50 α α collection of randomized sensor data. α: カテゴリ数 a single access point. M1(N) M1(LN) M1(G) N: 正規分布 LN: 対数正規分布 Proposal and Experiment G:ガンマ分布 • Estimate reconstruction accuracy assuming spatiotemporal correlation of the original data. NO2 CO • Did an field experiment of mobile environmental sensing in Shibuya,

and evaluated the proposal. O3 PM2.5