Semtech LORA overview q12015

Semtech Wireless Products


IoT Segments


Connected Devices: Market
Projected by Type

Cellular

Lo Power
WAN
Internet of objects

LAN
BT

3


Connectivity is a Challenge
Internet of Objects
80% of volume

Requirements:
 How to connect battery
operated low cost assets?
 Outdoor & harsh environments
 Low cost communication

 Low cost infrastructure
 Low power technology
 Robust communication
 Permits mobility
 Scalable system


Connected Devices: Access
LAN

Lo Power
WAN

Cellular

Short Range

Long Range w/ Battery

Long Range w/Power

Internet of Objects

Communicating Devices




Well established
standards

Good for:
•
•
•



Mobile devices
In-home
Short range

Not good:
•
•

Battery life
Long range




Emerging PHY
solutions / Undecided
Good for:
•
•
•



Long range
Long battery
Low cost

Not good:
•

High data-rate

Semtech Confidential

Traditional M2M






Well established
standards
Good for:
•
•
•

Long range
High data-rate
Coverage

•

•

Battery life
Cost

Not good:

5


Low Power WAN: US Market
SMART ENVIRONMENT
& INDUSTRIAL
 Forest fires

75M

 Air pollution

 Earthquake sensors

SMART METERING

SMART CITY

 Electric

 Smart parking

450M

 Water

200M

 Traffic sensors & control

 Gas

 Street lighting

 Infrastructure & production

 Infrastructure monitoring

 Avalanche and flooding

 Trash and waste containers

 Heating and AC

 Public events –location services

 Equipment status

 Advertising displays

 Factory control

TRACKING

SECURITY/
SMART HOME

 Motor bikes

 Smoke detectors

 Cars
 Bicycles

250M

 Kids
 Pets
 Insurance – valuable assets

 Find My Stuff

250M

AGRICULTURE
 Irrigation control

25M

 Environment sensing

 Security systems
 Smart appliances

 Heating control / monitoring

 Animal tracking
 Animal sensing – ovulation, birth

Semtech Confidential

6


Private vs Public Network
 Private network – individually managed networks
 Individual network – Metering, security, home automation, industrial control

 Public network – Telecom/operator managed networks
 Includes traditional private networks and permits numerous new applications
 A much more scalable model

Public
Network

Private
Network

Semtech Confidential

7

Network Options

(Macrocell)

LoRa Microcell or
Private Network

Semtech Confidential

9


LoRa Network Attributes
Key Features

Attribute/Benefit

157 dB link budget

Long range

>15 km range

Minimal infrastructure
Concentrator/gateway with capacity
>10 yrs battery lifetime

Ease of deployment

Long battery life

RX - 10 mA, sleep <200 nA
Unlicensed spectrum
Low infrastructure cost

Low cost

Low end-node cost

 A long range star architecture with high capacity
 Supports both mobile and fixed nodes

 Supports variable data rates and multi-channel simultaneously
Semtech Confidential

10


What is LoRa?
 Long range and low power

-148 dBm

LoRa
™

At +14dbm output power, 868MHz:
 In Sub-GHz: >5km dense urban, >13km suburban, >80km VLOS

Sensitivity*

 Robust communication


FSK
-125 dBm

-100 dBm
-90 dBm

Not susceptible to interference from Wifi, Bluetooth, GSM, LTE, etc

 High accuracy localization and ranging




Modulation format permits high accuracy localization
Not RSSI based and accounts for multi-path and fading
Permits high value additional features

 Improved network capacity



Connect more nodes
Additional capacity for features

Semtech Confidential

11


Products with LoRa™
 New modulation which provides significant advantages
 Family of products


SX1272/73



SX1276/77/78 : 138-960MHz frequency range



SX1280

: 860-1000MHz frequency range
: 2.4GHz frequency range

 All support 802.15.4g, WMBus & LoRa™
Key Features

Customer Benefit

-168dBm link budget (-148dBm sens, +20dBm TX,
900MHz)

Longest range

 Concentrator design to offer complete solution

Jamming resistant – tolerant to burst interference
Robust links and network efficiency

>100dB blocking
Simultaneous transmission on same channel
Insensitive to XTAL offsets (no TCXO)

Lower system cost

Eliminates need for repeaters
10mA RX current

Extended battery lifetime
Semtech Confidential

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Semtech Confidential

13


SX1272/73: Unparalleled Performance
 Long Range





+20

dBm output power, programmable in 1 dB steps
-137 dBm sensitivity
860 MHz – 1020 MHz frequency range w/ 60 Hz resolution

 Low Current






-12 dBm IIP3
69 dB adjacent channel rejection
Jamming resistant
Simultaneous channel reception

 Low System Cost




TCXO not required (20-30 ppm XTAL)
SAW not required
Eliminates repeaters
Semtech Confidential

demod

 Robust Links

demod

FSK Lora

9.3 mA RX FSK
10 mA RX Lora
100 nA Sleep
Fast wake-up: 100us Sleep to RX/TX

FSK Lora
mod mod






14


SX1276/77/78: Dual Band Operation
 Similar benefits as 1272/73



Long range, low current, robust performance, and lower system cost
More BW options for further improvements in sensitivity and narrow-band operation

 Covers all major ISM bands from 138-960MHz
 Optimal for dual band designs



Separate ports optimize performance and minimize BOM
+20dBm PA (PA_BOOST) can be used for high or low band
VDD

+20dBm
169MHz
6

5

4

3

2

1

NRESET

XTB

XTA

VR_DIG

VBAT1

VR_ANA

RFI_LF

VDD

7

169MHz
Matching

8

DIO0

RFO_LF

28

9

DIO1

PA_BOOST

27

10

DIO2

GND

26

VR_PA

25

SX1276

11

DIO3

12

DIO4

VBAT2

24

13 DIO5

GND

23

RFO_HF

22

GND

SCK

MISO

MOSI

NSS

RXTX

RFI_HF

14 VBAT3

15

16

17

18

19

20

21

Semtech Confidential

+14dBm
868MHz

VDD

868MHz
Matching
15


Ways To Use LoRa
 Drop into existing mesh using higher DR
 Max LoRa DR = 40kbps
 Take advantage of LoRa performance in existing Mesh
• Range
• Robustness – blocking, co-channel rejection, selectivity

 Extension of mesh network






Using existing mesh with higher than 40kbps DR
Use LoRa only for hard to connect nodes
Use LoRa from concentrator to end nodes to synchronize network
Use LoRa when latency is an issue – outage reports, spot polling, etc

 Asynchronous star network – Semtech HW solution





No latency
Improves network capacity
Long Range
Maximum battery life


LoRa Concentrator – SX1301
Superior System
 Multi-modem/channel concentrator
 Improved network capacity
 Simultaneous reception on same channel
 Easily scalable to add more capacity

DR3
Ch4

DR1
Ch2







Concentrator

DR5
Ch6
DR5
Ch2

DR7
Ch3

DR6
Ch1

Simultaneously demod - 2MHz spectrum
Simple star network – no latency
Adaptive link rate
Up to 5 million node transactions per day
Easily scalable for more capacity

 Localization

 The feature everyone wants

 Solves all system desires
 Range, battery lifetime, capacity, cost

 Reduces design cycle
 System HW and MAC provided
Semtech Confidential

17


The IoT Network Infra-structure
M2M

Protocol proxy server

GPRS
Ethernet
…

Internet

Lora
Gateway

Radio node

Lora
Gateway

Semtech Confidential

Lora
Gateway

18


Complete Ecosystem Loop

M2M interface
Internet

Service
provider
LoRa
Gateway

•
•
•
•

SMS
Web reporting
Control
Service

Customers

(LoRa End-nodes)
Semtech Confidential

19


Network Capacity: Adaptive Data Rate

Benefit of adaptive data rate High data rate (shorter range) nodes
communicate with micro-cell, but do
not have enough range to affect the
elevated gateway, capacity is
increased.

LoRa
Gateway

Elevated antenna
large cell area

Low data rate
Long range

Local micro-cell
LoRa
Gateway
High data rate
Short range

Semtech Confidential

20


Network Capacity: Single Data Rate

No benefit with single data rate Elevated antenna is now saturated by
all the sensors that should be handled
by the micro-cell.

LoRa
Gateway

All sensors use
low data rate,
get long range

Local micro-cell
LoRa
Gateway

Semtech Confidential

21





Strategy - LoRa for IOT

 LoRa + concentrator is the ideal technology to enable IOT





Localization highly valued feature to sell more end nodes
Same link budget as GSM, speeds and eases deployment
Only solution two-way solution to provide range and network capacity
Low power to support battery operated end-points

 Low cost infrastructure and end-nodes to drive volume
 Deployed network by Telecom fixes system/protocol
 Reduces R&D cycle because system is defined by operator

Semtech Confidential

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