Interference mitigation between WBAN equipped patients

Mahapatro, Judhistir; Misra, Sudip; Manjunatha, M.; Islam, Nabiul

doi:10.1109/wocn.2012.6331909

Cited by 21 publications

(18 citation statements)

References 11 publications

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“…Authors of [5] enables two or three coexisting WBANs to agree on a common TDMA schedule to reduce the interference. The work in [2] adopts a TDMA pollingbased scheme for traffic coordination inside a WBAN and a carrier sensing (CS) mechanism to deal with inter-WBAN interference.…”

Section: Related Workmentioning

confidence: 99%

“…This calculation enables C to command its nodes to select appropriate interferece mitigation scheme [1]. Other studies of [5] analyze the performance of a reference WBAN. They evaluate the performance in terms of bit error rate, throughput and lifetime which have been improved by adoption of an optimized time hopping code assignment strategy.…”

Section: Related Workmentioning

confidence: 99%

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Interference avoidance algorithm (IAA) for multi-hop wireless body area network communication

Ali

Moungla

Mehaoua

2015

2015 17th International Conference on E-Health Networking, Application &Amp; Services (HealthCom)

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Abstract-In this paper, we propose a distributed multi-hop interference avoidance algorithm, namely, IAA to avoid co-channel interference inside a wireless body area network (WBAN). Our proposal adopts carrier sense multiple access with collision avoidance (CSMA/CA) between sources and relays and a flexible time division multiple access (FTDMA) between relays and coordinator. The proposed scheme enables low interfering nodes to transmit their messages using base channel. Depending on suitable situations, high interfering nodes double their contention windows (CW) and probably use switched orthogonal channel. Simulation results show that proposed scheme has far better minimum SINR (12dB improvement) and longer energy lifetime than other schemes (power control and opportunistic relaying). Additionally, we validate our proposal in a theoretical analysis and also propose a probabilistic approach to prove the outage probability can be effectively reduced to the minimal.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Interference avoidance algorithm (IAA) for multi-hop wireless body area network communication

Ali

Moungla

Mehaoua

2015

2015 17th International Conference on E-Health Networking, Application &Amp; Services (HealthCom)

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“…Also, the constraint of low power consumption makes it inefficient to adopt the power control strategy, which is used in cellular networks [16]. We addressed this problem in our previous paper [17] by enabling two or more WBANs cooperating between themselves and having them agree on a common schedule, rather than sending data independently. If they agree with a common schedule, there might be a case that devices attached to a WBAN wait for relatively longer time than those devices that have large traffic or they are in large numbers attached to other WBANs.…”

Section: Introductionmentioning

confidence: 99%

Interference‐aware MAC scheduling and admission control for multiple mobile WBANs used in healthcare monitoring

Mahapatro

Misra

Mahadevappa

et al. 2014

Int J Communication

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In this paper, we address the problem of interference when multiple time division multiple access-based wireless body area networks (WBANs) come in the proximity of one another. We propose a simple solution that creates common non-conflicting schedule between these interfering WBANs. Our proposed scheme allows the reuse of maximum possible time slots among WBANs that are two-hop neighbors of one another. A flow admission control scheme is applied to control the flows during the period of interference. We show that the percentage of flows admitted because of flow control decreases with the increase in the network size and flow rate. We simulated a scenario where WBANs move randomly within a simulation area with a certain speed and meet at a particular point. We show that the signal to interference noise ratio (SINR) value of WBANs changes as long as they are within the transmission range of one another. Also, we show that the exchanges of common schedule (which is dependent on the number of times the SINR value drops below the threshold) are required in order to improve the packet delivery ratio in WBANs. INTERFERENCE-AWARE MAC SCHEDULING IN WBANS1353 the center and a receiver is placed at the center of the circle. The study of performance evaluation is limited to 16 transmitters and do not consider the scalability of the network nodes with the same topology.In the monitoring system, we considered patients carrying wearable systems and can move anywhere in the hospital. Pulse oxymeter is an example of one such wearable system, which can measure the amount of oxygen present in the blood. Medium access by the devices in such wearable systems is one of the important research challenges due to the shortage of available channels and bandwidth in the medical band. It is observed that slot-based medium access control (MAC) protocols are suitable for improved operation and performance, because such protocols require no additional overhead and data load is uniform across the nodes. In the literature, most of implementations of WBAN use the IEEE 802.15.4 standard or its variant for low power consumption [5][6][7]. It considers a star topology, where each sensor node sends traffic to the coordinator (controller) in their own slot time. In [6], Li and Tan proposed a TDMA-based MAC protocol for a wearable system having few sensor devices such as pulse oxymeter and a coordinator. The coordinator of the wearable system is responsible for scheduling and initiation of transmission of the end devices.Wireless body area networks use the 2.4 GHz industrial, scientific and medical (ISM) band for their operation. Because the ISM band is unlicensed, several other wireless devices based on Wi-Fi, Bluetooth, and other BANs share the same frequency band, thereby causing fairly high possibilities of interference. The effect of interference is very serious for patients equipped with BANs, because the devices typically monitor the critical conditions involving instruments for measuring ECG, EEG, and EMG. The seriousness is such that the misin...

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“…The interfering transmissions are scheduled based on minimum signal to interference and noise ratio (SINR). When two or more WBANs transmitting on the same frequency overlap, the received SINR by LC from these sensors falls, signals with SINR below 0 db are unacceptable, thus indicating interference [4]. The SINR of interfering neighbors can be lowered by coordinating broadcasted TDMA schedule from these sensors.…”

Section: Introductionmentioning

confidence: 99%

“…The SINR of interfering neighbors can be lowered by coordinating broadcasted TDMA schedule from these sensors. An interleaved [4] scheduled among multiple WBANs is prepared based on the matching minimum SINR value sensor id with first available transmission slot. Thus, the amount of packet loss is reduced and better network performance can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Scheduling Transmissions of Coexisting Wireless Body Area Networks Using Minimum Weight Match

Jamthe

Agrawal

2014

Lecture Notes in Electrical Engineering

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Wireless Body Area Network (WBAN) is extensively being used for ubiquitous health care monitoring. Coexisting multiple WBANs could possibly suffer from high interference and thus an appropriate scheduling scheme is desirable to improve network throughput for interfering nodes. The received Signal to Interference and Noise Ratio (SINR) from the sensors in the overlapped region of two or more WBANs which use the same transmitting frequency drops. This decrease is an indicator of inter-WBAN interference. Hence, we propose a scheduling algorithm which assigns the node with minimum SINR to first available transmission slot and so on. Thus, the nodes which suffer maximum interference are given higher priority to transmit in the revised Time division multiple access (TDMA) schedules. The local coordinator of each WBAN exchange messages with the interfering WBAN's coordinator and then tries to suppress interference by creating a new TDMA schedule for interfering nodes. Results obtained using simulations are encouraging as they indicate that minimum weight match scheduling can improve the packet drop rate and thus enhance the network performance.

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Interference mitigation between WBAN equipped patients

Cited by 21 publications

References 11 publications

Interference avoidance algorithm (IAA) for multi-hop wireless body area network communication

Interference avoidance algorithm (IAA) for multi-hop wireless body area network communication

Interference‐aware MAC scheduling and admission control for multiple mobile WBANs used in healthcare monitoring

Scheduling Transmissions of Coexisting Wireless Body Area Networks Using Minimum Weight Match

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