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ELEC-E7230 Mobile Communications System (5 cr)Presentation on Paper Titled Cellular Networks for Massive IoTHamit Taylan YUCE, 486530Aalto School of Electrical Engineering, Aalto University, Espoo, Finland

Contact: [h.taylanyuce@gmail.com]

What is IoT?1IoT is a concept where objects or devices are allowed to exchange data over the communication networks

Why is IoT important?2

28 billion connected devices by 2021

15 billion connected M2M and consumer electronics devices

1.9 trillion dollar by 2020

Massive vs Critical IoT3

Challenges for IoTDevice cost

Battery life

Coverage

Scalability

Diversity

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Communication Technologies for IoT5

LPWA Low Power Wide Area

Unlicensed LPWA

Licensed LPWA

Advantages of Cellular Networks6

Global Reach

QoS

Ecosystem

Diversity

Security

Cellular LPWA Solutions

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There cannot be a single cellular network solution for IoT uses cases,

EC-GSM (Extended Coverage GSM)

NB-IoT (Narrow Band IoT)

LTE-M (LTE for Machines)

These technologies are standardized in 2016 in 3GPP Release 13

EC-GSM (Extended Coverage GSM)

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GSM is still dominant in the market

Most of the IoT use cases use GPRS/EDGE

Coverage improvements up to 20 dB with respect to GPRS

New software on GSM is sufficient

Deployment is In-band GSM

Low device cost compared to GPRS/GSM devices

Vairable rates; GMSK 350 bps to 70 kbps, 8PSK up to 240 kbps

50 thousand devices per cell

Dublexing: FDD, HD, BW: 200 kHZ

LTE-M

9LTE is the leading mobile broadband technology and its coverage is expanding rapidly

Deployment is In Band LTE

Can be deployed in any LTE spectrum

BW is 1.08 MHz, Maximum transmit power is 20 dB

Variable rates 10 kbps to 1 Mbps for UL and DL

Supports FDD & TDD and HD

Reuse existing LTE base stations with software upgrade

Turbo code for UL and DL

OFDMA for DL and SC-FDMA for UL

Higher capacity compared to NB-IoT

NB-IoT

10Mix of LTE and 2G coverage

No voice capability

Deployment is In-Band, Guard-band LTE, standalone

DL and UL are OFDMA and SC-FDMA respectively

Software upgrade is sufficient

Peak data rate is 250 kbps for DL and 20 kbps for UL

Supports FDD and HD

Turbo code for UL

Low cost and energy consumption compared to LTE-M

Serves 50 thousand devices per cell

ConclusionThere will be billions of connected devices

Total added value is a good opportunity for the companies

There are also problems;

Interference Control,

Scalability,

Link Optimization,

Roaming

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