scholarly journals Uplink NOMA in Body Area Networks With Simple Node Pairing Strategies

2020 ◽  
Author(s):  
Costas Michaelides ◽  
Foteini-Niovi Pavlidou
Keyword(s):  
Interference Cancellation ◽  
Multiple Access ◽  
Body Area Networks ◽  
Resource Block ◽  
Feasible Direction ◽  
Body Area ◽  
Single Node ◽  
Access Protocol ◽  
First Time ◽  
Crucial Part

In body area networks (BANs), a node placed near the hub has a significant signal strength advantage. This issue, known as near-far problem, indicates that a near node may serve as a relay for a far node. Currently, the established orthogonal multiple access (OMA) requires the allocation of a specific resource block to a single node. In contrast, the emerging non-orthogonal multiple access (NOMA) allows simultaneous transmissions and uses successive interference cancellation (SIC) to recover the signals. For the first time in the literature, we introduce NOMA in BANs, to allow simultaneous transmissions from two nodes at a time, with distinguishable power levels. The crucial part of this technique is the dynamic pairing of the nodes by the hub. First, we review the fundamentals of uplink NOMA and we propose an access protocol in compliance with IEEE 802.15.6-2012, which combines random OMA with scheduled NOMA. Next, we propose three node pairing strategies, namely a random, a correlative and a conditional one, to meet the requirements of several applications. These strategies are evaluated with packet level simulations in OMNeT++. Our results show that the proposed scheme outperforms the basic OMA scheme at high packet rates and provides a feasible direction for novel relay-based applications.

scholarly journals Uplink NOMA in Body Area Networks With Simple Node Pairing Strategies

2020 ◽  
Author(s):  
Costas Michaelides ◽  
Foteini-Niovi Pavlidou
Keyword(s):  
Interference Cancellation ◽  
Multiple Access ◽  
Body Area Networks ◽  
Resource Block ◽  
Feasible Direction ◽  
Body Area ◽  
Single Node ◽  
Access Protocol ◽  
First Time ◽  
Crucial Part

In body area networks (BANs), a node placed near the hub has a significant signal strength advantage. This issue, known as near-far problem, indicates that a near node may serve as a relay for a far node. Currently, the established orthogonal multiple access (OMA) requires the allocation of a specific resource block to a single node. In contrast, the emerging non-orthogonal multiple access (NOMA) allows simultaneous transmissions and uses successive interference cancellation (SIC) to recover the signals. For the first time in the literature, we introduce NOMA in BANs, to allow simultaneous transmissions from two nodes at a time, with distinguishable power levels. The crucial part of this technique is the dynamic pairing of the nodes by the hub. First, we review the fundamentals of uplink NOMA and we propose an access protocol in compliance with IEEE 802.15.6-2012, which combines random OMA with scheduled NOMA. Next, we propose three node pairing strategies, namely a random, a correlative and a conditional one, to meet the requirements of several applications. These strategies are evaluated with packet level simulations in OMNeT++. Our results show that the proposed scheme outperforms the basic OMA scheme at high packet rates and provides a feasible direction for novel relay-based applications.

scholarly journals A Distributed Multiagent System Architecture for Body Area Networks Applied to Healthcare Monitoring

2015 ◽  
Vol 2015 ◽  
pp. 1-17 ◽  
Author(s):  
Filipe Felisberto ◽  
Rosalía Laza ◽  
Florentino Fdez-Riverola ◽  
António Pereira
Keyword(s):  
Intelligent Systems ◽  
Multiagent System ◽  
Detection System ◽  
Fall Detection ◽  
Body Area Networks ◽  
Design Development ◽  
Body Area ◽  
Single Node ◽  
Biomedical Sensors ◽  
Accident Detection

In the last years the area of health monitoring has grown significantly, attracting the attention of both academia and commercial sectors. At the same time, the availability of new biomedical sensors and suitable network protocols has led to the appearance of a new generation of wireless sensor networks, the so-called wireless body area networks. Nowadays, these networks are routinely used for continuous monitoring of vital parameters, movement, and the surrounding environment of people, but the large volume of data generated in different locations represents a major obstacle for the appropriate design, development, and deployment of more elaborated intelligent systems. In this context, we present an open and distributed architecture based on a multiagent system for recognizing human movements, identifying human postures, and detecting harmful activities. The proposed system evolved from a single node for fall detection to a multisensor hardware solution capable of identifying unhampered falls and analyzing the users’ movement. The experiments carried out contemplate two different scenarios and demonstrate the accuracy of our proposal as a real distributed movement monitoring and accident detection system. Moreover, we also characterize its performance, enabling future analyses and comparisons with similar approaches.

Hybrid Unified-Slot Access Protocol for Wireless Body Area Networks

2010 ◽  
Vol 17 (3-4) ◽  
pp. 150-161 ◽  
Author(s):  
Changle Li ◽  
Jiandong Li ◽  
Bin Zhen ◽  
Huan-Bang Li ◽  
Ryuji Kohno
Keyword(s):  
Body Area Networks ◽  
Wireless Body Area Networks ◽  
Body Area ◽  
Access Protocol

scholarly journals Energy Efficient Power Domain Non-Orthogonal Multiple Access Based Cellular Device-to-Device Communication for 5G Networks

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 237 ◽  
Author(s):  
Mohammed S. Al-kahtani ◽  
Lilatul Ferdouse ◽  
Lutful Karim
Keyword(s):  
Energy Efficiency ◽  
Power Allocation ◽  
Interference Cancellation ◽  
Multiple Access ◽  
Power Level ◽  
Resource Block ◽  
Interference Level ◽  
Power Domain ◽  
Device To Device ◽  
Water Filling

This paper examines the resource block and power allocation in the power domain non-orthogonal multiple access (PD-NOMA) based cellular device-to-device (D2D) systems. To improve the energy efficiency of the D2D systems and to manage the mutual interference level as well as the quality of service (QoS) requirement of cellular users, different power level is applied to the D2D users sharing the same resource blocks (RBs) to the legacy users. It is essential to design an efficient resource block and power allocation method for PD-NOMA based cellular D2D systems which guarantee the successive interference cancellation (SIC) order in the power allocation solution. In this paper, we propose an iterative algorithm of resource block and power allocation for cellular D2D system which incorporates the SIC aware geometric water filling (GWF) method in the power allocation solution. It is shown that the proposed SIC aware geometric water filling achieves higher energy efficiency compared to iterative water-filling (IWF) power allocation and the GWF based orthogonal multiple access (OMA) method.

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