Candidate Technology Qualitative Evaluation for Wireless Personal Area Networks
Explore a qualitative evaluation of candidate technologies for Low Power Wide Area Networks (LPWANs). Discover the pros and cons of the modulation scheme OFDM and its dependency on other technologies. This document offers insights for the IEEE P802.15 Working Group discussion.
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March 2017 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) doc.: IEEE 802.15-17-0228-00-lpwa Submission Title: [Candidate Technology Qualitative Evaluation] Date Submitted: [16 March, 2017] Source: [Joerg ROBERT] Company [Friedrich-Alexander University Erlangen-Nuernberg] Address [Am Wolfsmantel 33, 91058 Erlangen, Germany] Voice:[+49 9131 8525373], FAX: [+49 9131 8525102], E-Mail:[joerg.robert@fau.de] Re: [] Abstract: [This documents describes the proposed qualitative valuation] Purpose: [Discussion within group.] Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15. Submission Slide 1 Joerg ROBERT, FAU Erlangen-Nuernberg
March 2017 doc.: IEEE 802.15-17-0228-00-lpwa Candidate Technology Qualitative Evaluation Joerg Robert FAU Erlangen-Nuernberg Submission Slide 2 Joerg Robert, FAU Erlangen-Nuernberg
March 2017 doc.: IEEE 802.15-17-0228-00-lpwa Motivation One task of the IG LPWA is the identification of candidate technologies wrt. their applicability in Low Power Wide Area Networks (16/729r0) Potential use-cases and their requirements have been defined in the use-case list (16/770r3) This document presents a method to compare the candidate technologies on a qualitative basis Submission Slide 3 Joerg Robert, FAU Erlangen-Nuernberg
March 2017 doc.: IEEE 802.15-17-0228-00-lpwa General Evaluation Proposal Analysis the general suitability of a candidate technology Suitability Analysis pros and cons, and dependency on other technologies (this document) Qualitative Evaluation Quantitative Evaluation Exact performance (only for selected technologies) Submission Slide 4 Joerg Robert, FAU Erlangen-Nuernberg
March 2017 doc.: IEEE 802.15-17-0228-00-lpwa Qualitative Evaluation If a candidate technology is able to support a specific use-case, the pros and cons of the technology are listed Furthermore, the dependency on other technology options are given The following slides show the pros (green) and cons (orange) for the modulation scheme OFDM Grey indicates that the technology has neither pros nor cons wrt. a technology Submission Slide 5 Joerg Robert, FAU Erlangen-Nuernberg
March 2017 doc.: IEEE 802.15-17-0228-00-lpwa Channel Model Indoor Outdoor Rural Outdoor Urban OFDM is robust wrt. multi-path propagation (especially a problem in outdoor channels) when used with high bandwidth The short Delay Spread of indoor channels in addition to the low data-rates does not require the use OFDM Submission Slide 6 Joerg Robert, FAU Erlangen-Nuernberg
March 2017 doc.: IEEE 802.15-17-0228-00-lpwa Typical Power Supply CR 2025 2xAA Energy harvesting External OFDM has a high PAPR (Peak to Average Power Ratio) that leads to potentially inefficient amplifiers The cyclic prefix of OFDM requires energy that is not used in the receiver Higher power consumption that is critical for devices with low energy Submission Slide 7 Joerg Robert, FAU Erlangen-Nuernberg
March 2017 doc.: IEEE 802.15-17-0228-00-lpwa Node Velocity 3 km/h 30 km/h 120 km/h OFDM has problems at higher Doppler frequencies as the channel has to be almost static within the duration of an OFDM symbol Submission Slide 8 Joerg Robert, FAU Erlangen-Nuernberg
March 2017 doc.: IEEE 802.15-17-0228-00-lpwa Dependencies on Other Technologies The use of OFDM in frequency selective channels requires the use of a powerful Forward Error Correction to exploit is full benefits Dependent on the use of FEC Submission Slide 9 Joerg Robert, FAU Erlangen-Nuernberg
March 2017 doc.: IEEE 802.15-17-0228-00-lpwa Results of the Qualitative Evaluation OFDM is beneficial in case of outdoor channels OFDM has disadvantages in case of high mobility and if the power supply is limited Results can be used to evaluate use-cases in 16/770r3 This evaluation also has to consider the dependent technologies Technologies that have been identified as not suitable (Doc. 15-17/160r1) do not have to be evaluated Submission Slide 10 Joerg Robert, FAU Erlangen-Nuernberg
March 2017 doc.: IEEE 802.15-17-0228-00-lpwa Results of the Suitability Evaluation Access Control Public Lighting Alarms and Security Smart Grid - Fault Monitoring Asset Tracking Smart Grid - Load Control Assisted Living Smart Metering Cattle Monitoring Smart Parking Field Monitoring Smoke Detectors Global Tracking Structural Health Monitoring Industrial Plant Condition Monitoring Vending Machines - general Industrial Production Monitoring Vending Machines - privacy Light Switch Waste Management Pet Tracking Water Pipe Leakage Monitoring Pipeline Monitoring - Terrestrial Submission Slide 11 Joerg Robert, FAU Erlangen-Nuernberg
March 2017 doc.: IEEE 802.15-17-0228-00-lpwa Thank You! Comments? Questions? Submission Slide 12 Joerg Robert, FAU Erlangen-Nuernberg
