A Study of Wireless Communication Links on a Body Centric Network During Running

Sabti, Haider A.; Thiel, David V.

doi:10.1016/j.proeng.2014.06.005

Cited by 8 publications

(6 citation statements)

References 7 publications

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“…This paper reports a real time feedback WBAN using movement based time division multiplexing and follows previous work on analysis of the wireless link performance in body area networks [9].The recorded data for each running position revealed a set of angular windows for each sensor location at which a reliable wireless communication can occur. These angular windows are repetitive in a periodic movement such as running and can be converted into time windows when the swing time of runner has been determined.…”

Section: Resultsmentioning

confidence: 90%

Movement based time division multiplexing for near real time feedback body area network applications

Sabti

Thiel

2014

2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)

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A time division multiplexed coding system was designed and tested for a body-centric star network using a wireless node mounted in six different places in different time lots on the arm and leg and a central node (hub) on the chest during running. The proposed network allows a coordinated approach to gait analysis. The time sequence for communications between the wireless nodes and the hub is set during the first few steps as runners have different styles and can run at different speeds. After calibration the central unit sends a synchronization pulse during every running step and sets a unique transmission time window for each individual node. The time windows are scheduled when there is reliable communications between the hub and the sensor nodes around the body. Accelerometers on each node are used to identify these time windows for the diverse angles of rotation of the human limbs during running.

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Section: Resultsmentioning

confidence: 90%

Movement based time division multiplexing for near real time feedback body area network applications

Sabti

Thiel

2014

2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)

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“…Industrial and environmental monitoring [19] requires an environment that can collect and process massive amounts of data in a wireless sensor network systems. There is need for a protocol on data transmission collected through the application of monitoring and managing the standby state and weather conditions.…”

Section: Monitoring Systemsmentioning

confidence: 99%

“…Wireless body area networks (WBANs) [20] are low-cost, compact body devices that sense human body parameters (temperature, brain activity, and heart rate) [19] and deliver information gathered to end stations. Body nodes (BNs) constitute the WBAN: A BN is a wearable node that is inserted into the human body.…”

Section: Mac Protocol For Wireless Body Area Networkmentioning

confidence: 99%

Dynamic Duty-Cycle MAC Protocol for IoT Environments and Wireless Sensor Networks

Kim

Kang

2019

Energies

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This paper proposes a new protocol that can be used to reduce transmission delay and energy consumption effectively. This will be done by adjusting the duty-cycle (DC) ratio of the receiver node and the contention window size of the sender node according to the traffic congestion for various devices in the Internet of Things (IoT). In the conventional duty-cycle MAC protocol, the data transmission delay latency and unnecessary energy consumption are caused by a high collision rate. This is because the receiver node cannot sufficiently process the data of the transmitting node during the traffic peak time when the transmission and reception have the same duty-cycle ratio. To solve this problem, this paper proposes an algorithm that changes the duty-cycle ratio of the receiver and broadcasts the contention window size of the senders through Early Acknowledgment (E-ACK) at peak time and off/peak time. The proposed algorithm, according to peak and off/peak time, can transmit data with fewer delays and minimizes energy consumption.Energies 2019, 12, 4069 2 of 13 an environment with traffic congestion causes problems of transmission delay, and the entire service life of the application is shortened due to the collision. Thus, the use of the existing duty-cycle (DC) MAC protocol [5] is not suitable. Therefore, it is necessary to develop a protocol for effective event detection [6] and data collection [7] considering various traffic conditions. For example, if the total number of wake-ups to listen to an application is determined [8], the existing duty-cycle MAC occurs irrespective of the congestion occurring at the time of the traffic. This reduces data collisions and transmission delays if the receiver wakes up frequently only at times in heavy traffic.The proposed algorithm increases the number of wake-up times by reducing the sleep time of the receiver at the peak traffic time and reduces the number of wake-up in the opposite case. This demonstrates reduced energy consumption. This paper proposes a new duty-cycle based MAC protocol suitable for congested WSNs and IoT. According to the degree of network traffic congestion, the duty-cycle ratio of the receiver and the contention window size information of the senders are broadcast through E-ACK (Early Acknowledgment), which reduces the transmission latency and waste of energy.The composition of the paper is described in detail in Section 1, followed by a summary of related work in Section 2. Section 3 proposes the operation procedure of the MAC layer. In Section 4, mathematical modeling is performed to predict the proposed algorithm and performance. In Section 5, we compare the performance of the proposed algorithm with the energy consumption and average service latency. Finally, Section 6 presents conclusions and future research topics.

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“…These sink nodes are capable of controlling the transmissions of other nodes attached to the player body [8,9]. Additional details with regards to the node hardware design and functionality can be found in [10].…”

Section: System and Measurement Settingsmentioning

confidence: 99%

CSMA Neighbors Identification in Body Sensor Networks

Sabti

Thiel

2018

The 12th Conference of the International Sports Engineering Association

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A CSMA algorithm was implemented and tested using 2.45 GHz wearable sensors on five human subjects moving in formation. The algorithm forces the nodes to repeatedly sense the carrier frequency to recognize when other nodes are in/out of coverage. The paper reports different sink nodes location on the body and the effect of transmitter power on the reliability. The results showed 100% successful wireless communications between sink nodes within coverage. Allowing this information to be available in real time have a significant importance on measuring up athlete proximity and performance with respect to time spent on one or multiple locations.

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A Study of Wireless Communication Links on a Body Centric Network During Running

Cited by 8 publications

References 7 publications

Movement based time division multiplexing for near real time feedback body area network applications

Movement based time division multiplexing for near real time feedback body area network applications

Dynamic Duty-Cycle MAC Protocol for IoT Environments and Wireless Sensor Networks

CSMA Neighbors Identification in Body Sensor Networks

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