CRAWDAD dartmouth-zigbee_radio

Dataset of radio characteristics of 802.15.4 mobile person-to-person communications.The dataset contains results from a simple yet systematic set of benchmark experiments that offer a number of important insights into the radio characteristics of mobile 802.15.4 person-to-person communications.date/time of measurement start: 2007-08-12collection environment: Future mobile sensing systems are being designed using 802.15.4 low-power short-range radios for a diverse set of devices from embedded mobile motes to sensor-enabled cellphones in support, for example, of people-centric sensing applications. However, there is little known about the use of 802.15.4 in mobile sensor settings nor its impact on the performance of future communication architectures. We conducted a simple yet systematic set of benchmark experiments that can offer a number of important insights into the radio characteristics of mobile 802.15.4 person-to-person communication.network configuration: For all experiments we use two Tmote Invents operating in the 2.4 GHz band, one acting as a transmitter and the other as a receiver. A different two are chosen for each experiment from a large pool of Invents to avoid biases specific to a particular Invent's hardware. The transmitter is programmed to send packets at the maximum transmission power (0 dBm) and transmission rate.data collection methodology: We investigate metrics like RSSI (Received Signal Strength Indicator), LQI (Link Quality Indicator), and throughput targeting studies to characterize the radio environment in wireless sensor networks. We also measure the effective contact time, i.e., the time window during which nodes are in radio contact with each other and have enough available bandwidth between them to support data transfer.We carry out our experiments according to three benchmarks:i) outdoor experiments in a soccer field away from obstacles and radio interference in the 802.15.4 radio band,ii) outdoor experiments along a sidewalk which is an example of urban environment, and,iii) indoors experiments in a 55 meter hallway in an office building.In all the cases people were moving at walking speed. We repeat the experiments positioning the transmitter and receiver nodes at different places on the body, (i.e., on the chest front hanging on from a necklace, inside a pocket). This choice is motivated by the fact that we are also interested in quantifying the impact of the position on the body where the nodes are more likely to be carried. We run each experiment five times and calculate the 95% confidence interval. Soccer_field short description: Traceset of outdor experiments in a soccer field measuring the radio characteristics of 802.15.4 mobile person-to-person communications.description: The traceset contains results from outdoor experiments in a soccer field away from obstacles and radio interference to get insights into the radio characteristics of mobile 802.15.4 person-to-person communications.Sidewalk short description: Traceset of outdor experiments in a sidewalk measuring the radio characteristics of 802.15.4 mobile person-to-person communications.description: The traceset contains results from outdoor experiments along a sidewalk which is an example of urban environment.Hallway_people crossing short description: Traceset of indoor experiments in a hallway in an office building measuring the radio characteristics of 802.15.4 mobile person-to-person communications.description: The traceset contains results from indoors experiments in a 55 meter hallway in an office building where people approach each other from a long distance.Hallway_tx_at_the_edgeshort description: Traceset of indoor experiments in a hallway in an office building measuring the radio characteristics of 802.15.4 mobile person-to-person communications.description: The traceset contains results from indoors experiments in a 55 meter hallway in an office building where the transmitter is statically positioned at one edge of the hallway and one people carrying the receiver walking away from it.Hallway_turning_cornersshort descriptionTraceset of indoor experiments in a hallway in an office building measuring the radio characteristics of 802.15.4 mobile person-to-person communications.descriptionThe traceset contains results from indoors experiments in a 55 meter hallway in an office building where the person carrying the receiver node turns several corners in the building. Hallway_different_bodiesshort descriptionTraceset of indoor experiments in a hallway in an office building measuring the radio characteristics of 802.15.4 mobile person-to-person communications.descriptionThe traceset contains results from indoors experiments in a 55 meter hallway in an office building where the receiver node is carried by two people with different body sizes.