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Deploying 5G-Technologies in Smart City and Smart Home Wireless Sensor Networks with Interferences

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Abstract

Deploying 5G technologies in a combination of smart homes and smart city opens for a new ecosystem with big potentials. The potentials lie in the creation of an advanced ICT infrastructure with support for connected and entangled services possibilities including technologies for efficient communication in an Internet of Things (5G) contexts. In this paper we discuss some of the key challenges that exist in the smart city and smart home networks in the light of possible 5G-solutions. Focus is on deploying cognitive radio technologies (5G) which enables the smart city networks to support interconnected infrastructure elements, to handle big-data from the smart homes, and to be compatible with existing infrastructures. The considered cognitive radio technology is based on pre-coded OFDM which offers the needed flexibility to deal with the key challenges found in the smart home networks. Thus, it is able to overcome the WiFi interferences and the wall penetration losses for a limited power cost. By simulation it has been found that power saving in the range of 10–23 % can be achieved for a small bandwidth cost. Additionally, it has been found that the choice of the smart home gateway location can change its power consumption with 99 %. The developed simulator incorporates interferences, wall losses, and packet error rates, which is elaborated in this paper.

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Authors and Affiliations

  1. Center for Communication and Information Technologies, Aalborg University Copenhagen, Copenhagen, Denmark

    Per Lynggaard & Knud Erik Skouby

Authors
  1. Per Lynggaard
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  2. Knud Erik Skouby
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Correspondence to Knud Erik Skouby.

Appendix

Appendix

The common settings for the systems simulations

  • Frequency 2.4 GHz

  • Receiver noise figure 10 dB.

  • Distance power-loss coefficient (ITU model) 28

  • Packet size (number of transmitted bytes) 128

  • Packet error rate at all nodes 10−4

  • SCR RRC filter roll-off coefficient 0.25

  • SCR FDM guard bands 10 %

  • n0: WiFi/802.11b, 2.4 GHz, 150 mW output power

  • l01: 6 m, 10 dB wall damping

  • l11: 2 m, no walls

  • l12: 4 m, 20 dB wall damping

  • l22: 2 m, no walls

The settings for the CR modulation and multiplexing (OFDM) part:

  • Number of sub-carries (bins) 16

  • Spectrum per bin 64 kHz

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Lynggaard, P., Skouby, K.E. Deploying 5G-Technologies in Smart City and Smart Home Wireless Sensor Networks with Interferences. Wireless Pers Commun 81, 1399–1413 (2015). https://doi.org/10.1007/s11277-015-2480-5

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  • DOI: https://doi.org/10.1007/s11277-015-2480-5

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