Cognitive radio and RF energy harvesting for medical WBANS

Cognitive radio and RF energy harvesting for medical WBANS

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Wearable wireless medical sensors beneficially impact the healthcare sector, and this market is experiencing rapid growth. Globally, the digital health market is forecast to increase from $80 billion in 2015 to $200 billion in 2020. Medical body area networks (MBANs) improve the mobility of patients and medical personnel during surgery, accelerate the patients' recovery, while facilitating the remote monitoring of patients suffering from chronic diseases. Currently, MBANs are being introduced in unlicensed frequency bands, where the risk of mutual interference with other electronic devices can be high. Techniques developed during the evolution of cognitive radio (CR) can potentially alleviate these problems in medical communication environments. In addition, these techniques can help increase the efficiency of spectrum usage to accommodate the rapidly growing demand for wireless MBAN solutions and enhance coexistence with other collocated wireless systems. A viable architecture of an MBAN with practical CR features is proposed in this work. Additionally, ultra wideband (UWB) radio for the implementation of CR offers many advantages to MBANs, and some features of this technology can be exploited for effective implementation of CR. Conceptual aspects associated with energy harvesting and practical identification of spectrum opportunities for radio frequency (RF) energy scavenging motivates the options taken in the development of the protocols. The physical (PHY) and medium access control (MAC) layer aspects of the proposal are proposed in addition to their implementation challenges in the context of CR.

Chapter Contents:

  • 7.1 Introduction
  • 7.2 Hospital scenarios
  • 7.2.1 Cognitive radio solution in 2.4 GHz
  • 7.2.2 Enhancement through the use of an additional channel
  • 7.3 CR solution in the UWB band
  • 7.4 Wireless body area networks
  • 7.4.1 Introduction
  • 7.4.2 Architecture for WBSNs with CR capabilities
  • 7.4.3 Topology aspects
  • 7.4.4 Hardware for the cognitive sensor node
  • 7.5 Communication aspects of WBSNs with CR capabilities
  • 7.5.1 PHY layer aspects
  • 7.5.2 Medium access control sub-layer aspects
  • 7.5.3 Network layer aspects
  • 7.6 Spectrum opportunities for RF energy harvesting
  • 7.6.1 Average received power
  • 7.6.2 Indoor opportunities
  • 7.6.3 Outdoor opportunities
  • 7.7 Innovative MAC protocols mechanism with BACK Request
  • 7.7.1 BACK mechanism with BACK Request
  • 7.7.2 Proposed scheme with no BACK Request
  • 7.7.3 Modelling and simulation results
  • 7.8 Conclusions
  • References

Inspec keywords: telecommunication power management; radiofrequency interference; energy harvesting; body area networks; ultra wideband radar; biomedical communication; cognitive radio; protocols; diseases

Other keywords: radiofrequency energy scavenging; digital health market; RF energy harvesting; chronic diseases; collocated wireless systems; UWB radio; wireless MBAN solutions; CR; healthcare sector; MBAN; unlicensed frequency bands; ultrawideband radio; medical body area networks; medical communication environments; MAC layer; RF energy scavenging; medical WBANS; medium access control layer; cognitive radio; electronic devices; radiofrequency energy harvesting; mutual interference; wearable wireless medical sensors; medical personnel

Subjects: Energy harvesting; Radio links and equipment; Protocols; Electromagnetic compatibility and interference; Energy harvesting; Biomedical communication

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