Body area network radio channel measurement set

Smith, David B.; Hanlen, Leif; Rodda, David; Gilbert, Ben; Jie, Dong; Chaganti, Vasanta

doi:10.4225/08/5947409d34552

Cited by 5 publications

(10 citation statements)

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“…The radios were transmitting at 0 dBm transmit power with −100 dBm receive sensitivity. A description of these wearable radios and hardware platform can be found in [15] and the experimental dataset can be downloaded from [11]. Each transmitter transmits in a roundrobin fashion, at 2.36 GHz, with 5 ms separation between each other.…”

Section: A Experimental Scenariomentioning

confidence: 99%

“…We analyze the performance of the proposed adaptive CSMA/CA by performing decentralized cross-layer optimization across the physical, MAC and network layers for two-tiered communications, with on-body BANs at the lower tier and a BBN at the upper tier. The analysis is applied to an open-access radio measurement dataset provided in [11] (captured using NICTA † developed wearable channel sounders/radios), recorded from 'everyday' mixed-activities and a range of measurement scenarios with people wearing radios. From the implementation of the proposed adaptive CSMA/CA with the experimental measurements used in this paper, we demonstrate the following:…”

Section: Introductionmentioning

confidence: 99%

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Cross-Layer Designs for Body-to-Body Networks: Adaptive CSMA/CA with Distributed Routing

Shimly

Smith

Movassaghi

2018

2018 IEEE International Conference on Communications (ICC)

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In this paper, we propose a novel adaptive carrier sense multiple access scheme with collision avoidance (CSMA/CA) to perform efficient and reliable data transfer with increased throughput across multiple coexisting wireless body area networks (BANs) in a tiered architecture. We investigate the proposed scheme using two distributed cross-layer optimized dynamic routing techniques, i.e., shortest path routing (SPR) and cooperative multi-path routing (CMR). The channel state information from the physical layer is passed on to the network layer using an adaptive cross-layer carrier sensing mechanism between the physical and MAC layer, which adjusts the carrier sense threshold (e.g., RSSI) periodically based on the slowlyvarying channel condition. An open-access experimental dataset of 'everyday' mixed-activities is used for analyzing the crosslayer optimization. Our proposed optimization using adaptive carrier sensing performs better than static carrier sensing with CSMA/CA as it reduces the continuous back-off duration and latency as well as significantly increases the throughput (in successful packets/s) by more than 50%. Adaptive CSMA/CA also shows 20% and 6% improvement over a coordinated TDMA approach with higher duty cycle for throughput and spectral efficiency, respectively, and provides acceptable packet delivery ratio and outage probability with respect to SINR.

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Section: A Experimental Scenariomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cross-Layer Designs for Body-to-Body Networks: Adaptive CSMA/CA with Distributed Routing

Shimly

Smith

Movassaghi

2018

2018 IEEE International Conference on Communications (ICC)

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“…The radios were transmitting at 0 dBm power with −100 dBm receive sensitivity. A description of these wearable radios can be found in [11] and the "open-access" dataset can be downloaded from [12]. Each Tx transmits in a roundrobin fashion, at 2.36 GHz, with 5 ms separation between transmission and also acts as Rx capturing RSSI (Receive Signal Strength Indicator) values.…”

Section: Experimental Scenariomentioning

confidence: 99%

Wide-Sense-Stationarity of Everyday Wireless Channels for Body-to-Body Networks

Shimly

Smith

Movassaghi

2018

2018 IEEE International Conference on Communications (ICC)

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The existence of wide-sense-stationarity (WSS) in narrowband wireless body-to-body networks is investigated for "everyday" scenarios using many hours of contiguous experimental data. We employ different parametric and non-parametric hypothesis tests for evaluating mean and variance stationarity, along with distribution consistency, of several body-to-body channels found from different on-body sensor locations. We also estimate the variation of power spectrum to evaluate the time independence of the auto-covariance function. Our results show that, with 95% confidence, the assumption of WSS is met for at most 90% of the cases with window lengths of 5 seconds for the channels between the hubs of different BANs. Additionally, in the best-case scenario, the hub-to-hub channel remains reasonably stationary (with more than 80% probability of satisfying the null hypothesis) for longer window lengths of more than 10 seconds. The short time power spectral variation for body-to-body channels is also shown to be negligible. Moreover, we show that body-to-body channels can be considered widesense-stationary over significantly longer periods than on-body channels.

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“…Algorithm 3 Main steps for Adaptive Backoff Game 1: After execute line 19 in Algorithm 2 2: The Hub estimated the number of coexisting WBANs n est by using equation (28) 3: After obtain n est . The Utility Function V (CW min ) can be constructed as a function of w, where the PDR is obtained as PDR(P * −i , R * −i ) from the Nash Equilibrium in the Link Adaptation Game.…”

Section: :18mentioning

confidence: 99%

“…In addition, a non-linear power estimation [6] is also made to measure the actual circuit energy consumptions, to provide a more realistic evaluation of the system. In this scenario, a realistic measurement [28] using small body-mounted "channel sounder" radios that operated at 2.36 Ghz is adopted in the simulation. The measurement set contains both inter-WBAN and intra-WBAN channels of the co-existing WBANs, which are measured on human wearers in many different environments, involving subjects doing a mix of distinctive everyday activities.…”

Section: Simulation Analysismentioning

confidence: 99%

Robust Wireless Body Area Networks Coexistence: A Game Theoretic Approach to Time-Division MAC

Yang,

Smith

2018

Preprint

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The enabling of wireless body area networks (WBANs) coexistence by radio interference mitigation is very important due to a rapid growth in potential users, and a lack of a central coordinator among WBANs that are closely located. In this paper, we propose a TDMA based MAC layer Scheme, with a back-off mechanism that reduces packet collision probability; and estimate performance using a Markov chain model. Based on the MAC layer scheme, a novel non-cooperative game is proposed to jointly adjust sensor node's transmit power and rate. In comparison with the state-of-art, simulation that includes empirical data shows that the proposed approach leads to higher throughput and longer node lifespan as WBAN wearers dynamically move into each other's vicinity. Moreover, by adaptively tuning contention windows size an alternative game is developed, which significantly reduces the latency. Both proposed games provide robust transmission under strong inter-WBAN interferences, but are demonstrated to be applicable to different scenarios. The uniqueness and existence of Nash Equilibrium (NE), as well as close-to-optimum social efficiency, is also proven for both games.

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Body area network radio channel measurement set

Cited by 5 publications

References 0 publications

Cross-Layer Designs for Body-to-Body Networks: Adaptive CSMA/CA with Distributed Routing

Cross-Layer Designs for Body-to-Body Networks: Adaptive CSMA/CA with Distributed Routing

Wide-Sense-Stationarity of Everyday Wireless Channels for Body-to-Body Networks

Robust Wireless Body Area Networks Coexistence: A Game Theoretic Approach to Time-Division MAC

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