GSPEED - BLE-based gait speed dataset

Bluetooth Low Energy (BLE) database to evaluate the gait speed of individuals in an in-home environment. The database is composed of several BLE RSSI measurements from different wearable devices and different BLE beacons, corresponding to 382 walks performed by 13 actors. Each row represents an RSSI measurement. The structure of the dataset is as follows: <pre><strong>mac</strong>: The MAC address of the detected beacon. <strong>rssi</strong>: The RSSI value obtained for the beacon. <strong>device</strong>: A four-character descriptor for the smartwatch that performed the scan. <strong>timestamp</strong>: The time stamp at which the scan was received. <strong>user</strong>: The id of the user that was performing the experiment. <strong>direction</strong>: A number (0 or 1) indicating the direction of the walk. <strong>walk_id</strong>: A number that identifies each walk. <strong>speed</strong>: The actual speed of the user, in $m/s$.</pre>本数据集为低功耗蓝牙（Bluetooth Low Energy, BLE）数据库，用于评估居家环境下个体的步态行走速度。该数据集包含来自多款可穿戴设备与不同BLE信标的多组RSSI（接收信号强度指示，Received Signal Strength Indicator）测量数据，对应13名受试者完成的382次行走实验。每一行对应一条RSSI测量记录。数据集结构如下：<pre><strong>mac</strong>：被检测到的信标的MAC（Media Access Control，媒体访问控制）地址。<strong>rssi</strong>：该信标的RSSI接收信号强度值。<strong>device</strong>：执行扫描操作的智能手表的四字符描述符。<strong>timestamp</strong>：接收到扫描请求的时间戳。<strong>user</strong>：参与本次实验的受试者编号。<strong>direction</strong>：用于标识行走方向的数值（取值为0或1）。<strong>walk_id</strong>：用于唯一标识每一次行走的编号。<strong>speed</strong>：受试者的实际行走速率，单位为米每秒（$m/s$）。</pre>