session 5 nb-iot networks - itu › en › itu-d › regional-presence... · ¾65% dqg rqo\ 1r $6...
TRANSCRIPT
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Session 5: NB-IoT Networks
ITU Asia-Pacific Centre of Excellence TrainingOn
“Traffic engineering and advanced wireless network
1
On“Traffic engineering and advanced wireless network
planning”17-19 October 2018,
Suva, Fiji
Sami Tabbane
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Objectives
• Present the evolution of LTE towards LTE-M and NB-IoT for IoT services introduction introduction
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I. Introduction
II. LTE-M
III. NB-IoT
IV. State of Art
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I. IntroductionI. Introduction
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LPWA could account 70% of Cellular IoT Connections in 2020
Requirements
0.8B
0.2B
Connections in 2020 (Billion)
CCTV(Camera) In-vehicle Entertainment…
MarketSegment
3G/4G
Technology
2G/3G/Cat-1Cat-M1
l >10Mbps
l ~1Mbpsl Low power
IoT Gateway Backhaul Wearable
2B l Low Throughput (<100kbps)l Deep Coverage (20dB)l Low power (10 Years)l Low cost (<$5)
0.8B
LPWA: Low Power Wide Area
Cat-M1
Short Range Tech.Sigfox, LoRa
NB-IoT
l Low power consumption
Wearable …
Sensors, Meters Asset Tracking Smart Parking Smart agriculture …
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C-IoT CoverageUnlicensed IoT
LTE CoverageWifi coverage
Carrier-grade Reliability
C-IoT
Re-use existing Cellular network
C-IoT provides wide WAN coverage
Roaming
4G-LikeSecurity
• Unlicensed technology is for local coverage• C-IoT is for wide coverage
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Future Oriented Cellular IoT Network: NB-IoT+eMTC+4G
2020 20252005 2016
2G(900M)
3G
Low Cost Cellular Low Cost Cellular IoTIoTPlanPlan
RefarmingRefarmingRefarmingRefarming
DoneDoneSTOP GPRS M2M ServiceSTOP GPRS M2M Service
Plan Plan RefarmingRefarming
RefarmingRefarmingDoneDoneReplace 3G M2M with 4GReplace 3G M2M with 4G
eMTC
NB-IoT
4G(Including CAT-1)
~100kbps Cellular IoT(Full Capability LPWA)~100kbps Cellular IoT(Full Capability LPWA)
~1Mbps Cellular IoT~1Mbps Cellular IoT
~10Mbps Cellular IoT~10Mbps Cellular IoT
Future Oriented Future Oriented Cellular IoT Cellular IoT Technology Technology
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LTE Bandwidth
20MHz1.4MHz
3MHz
5MHz 10MHz 15MHz
10-year Battery Life
PSM State
20+dB Gain Over 2G Coverage
9~12 dB
N Repetitions~17dB
NB-IoT
200KHz
NB-IoT Network Performance
Higher Power density
PSM: Power Saving Mode
200kHz 200kHz200kHz
Standalone LTE Guard Band LTE In Band
Data Wake up
NB-IoT Controller Service Platform
DL DataSingleRAN(2G/3G/4G/NB-IoT)
SingleRAN Based Network
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NB-IoT/eMTC Standard’s evolution path to 5G
• Positioning:E-CID,OTDOA
• SC-PTM
• 14dBm output power
• Peak throughput improvement
(DL 114kbps/UL 142.5kbps)
• TDD NB-IoT
• RRM measurement, latency improvement
• NPRACH enhancement
• Differ group QoS
Rel-14 Rel-15
NB-IoT
eMTC
Technology:
NR、LTE to cover high band
and low band
eMBB
URLLCmMTCTechnology:
• Positioning:OTDOA
• SC-PTM
• VoLTE coverage improvement (5dB)
• 5MHz/20MHz bandwidth
(UL 3Mbps/7Mbps;DL 4Mbps/27Mbps)
• Capacity improvement: Sub-PRB eMTC (45KHz)
• 64QAM
• Low UE output power
Rel-14 Rel-15NB-IoT,
• mMTC NR will not be considered until R17;
• NB-IoT will be used to cover 5G mMTC use case
before R17
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R14: Positioning to simplify device requirement
GPS + NB-IoT (Connectivity) NB-IoT (OTDOA)
TATA
TA
• Device cost: ~50USD
• Accuracy: 10m
• Latency:30s
• Device cost: ~40USD
• OTDOA: 30~50m
• Latency:10s
Monthly service fee: 5USD
Kids tracking (GizmoPal)
Kids tracking (Filip2 Tracker)
BaaS Business Model:NB-IoT Tracking Technologies Overview:
• Power consumption:
0.3mAh/Report
• Power consumption:
0.2mAh/Report
NB-IoT Tracker
Kids tracking (Filip2 Tracker)
Monthly fee:
USD10 for voice and data
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Release-13 3GPP evolutions to address the IoT market
eMTC: LTE enhancements forMTC, based on Release-12(UE Cat 0, new PSM, powersaving mode)
NB-IOT: New radio added tothe LTE platform optimizedfor the low end of the marketfor the low end of the market
EC-GSM-IoT: EGPRSenhancements incombination with PSM tomake GSM/EDGE marketsprepared for IoT
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Main eMTC, NB-IoT and EC-GSM-IoT features
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II. LTE-MII. LTE-M
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Technology
• Evolution of LTE optimized for IoT
• Low power consumption and extended autonomy
• Easy deployment
• Interoperability with LTE networks• Interoperability with LTE networks
• Low overall cost
• Excellent coverage: up to 11 Km
• Maximum throughput: ≤ 1 Mbps
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Roadmap
• First released in Rel.1in 2 Q4 2014• Optimization in Rel.13• Specifications completed in Q1 2016• Available in 2017
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LTE to LTE-M
3GPP Releases 8 (Cat.4) 8 (Cat. 1) 12 (Cat.0) LTE-M 13 (Cat. 1,4 MHz) LTE-M
Downlink peak rate (Mbps) 150 10 1 1
Uplink peak rate (Mbps) 50 5 1 1
Number of antennas (MIMO) 2 2 1 1
Duplex Mode Full Full Half Half
UE receive bandwidth (MHz) 20 20 20 1.4
UE Transmit power (dBm) 23 23 23 20UE Transmit power (dBm) 23 23 23 20
• New category of UE (“Cat-0”): lower
complexity and low cost devices
• Half duplex FDD operation allowed
• Single receiver
• Lower data rate requirement (Max: 1 Mbps)
• Reduced receive bandwidth to 1.4 MHz
• Lower device power class of 20 dBm
• 15dB additional link budget: better coverage
• More energy efficient because of its extended
discontinuous repetition cycle (eDRX)
Release 12 Release 13
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Architecture
Present LTE Architecture
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Architecture
End Device Email
LTE Access
FrequencyFrequency BandBand Narrow Band Narrow Band
AccessAccess LTELTE--MM
RangeRange ~ 11 Km~ 11 Km
ThroughputThroughput ~ 1 Mbps~ 1 Mbps
End Device
New baseband Softwarefor LTE-M
Remote Monitoring
Customer IT
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Spectrum and access
• Licensed Spectrum
• Bandwidth: 700-900 MHz for LTE
• Some resource blocks allocated for IoT on LTE bands
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III. NB-IOTIII. NB-IOT
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Current status
April 2014
May 2014
March 2015
August 2015
November 2015
Jun2015
2017+
Narrowband proposal to Connected
Living
3GPP ‘Cellular
IoT’ Study Item
GSMA Mobile IoT
created
3GPP alignment on single standard
1st live pre-standard NB-IoT
message
Full NB-IoT 3GPP
Standard Released
Commercial rollout
Evolution of LTE-M
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Comparison with LTE-M
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NB-IoT main features and advantages
Reuses the LTE design extensively: numerologies,DL OFDMA, UL SC-FDMA, channel coding, ratematching, interleaving, etc.Reduced time to develop: Full specifications. NB-IoT products for existing LTE equipment
and software vendors.and software vendors.June 2016: core specifications completed.Beginning of 2017: commercial launch of productsand services.NB-IoT is non backwards compatible version of LTE targeted for cellular based IoT applications.
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Main features
Objectives• Lower cost than eMTC• Extended coverage: 164 dB maximum coupling loss or link budget (at
least for standalone) to be compared to GPRS link budget of 144dB and LTE of 142.7 dB
• Receiver sensitivity = -141 dBm• Long battery life: 10 years with 5 Watt Hour battery (depending on traffic
and coverage needs)• Support for massive number of devices: at least 50.000 per cellMain simplificationMain simplification• Reduced data rate/bandwidth, mobility support and further protocol
optimizations3 modes of operation:• Stand-alone: stand-alone carrier, e.g. spectrum currently used by
GERAN systems as a replacement of one or more GSM carriers• Guard band: unused resource blocks within a LTE carrier’s guard-band • In-band: resource blocks within a normal LTE carrier
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Main features
Main PHY features:• Narrow band support of 180 kHz• Supports two modes for uplink
Single tone with 15 kHz and/or 3.75 kHz tone spacing Multiple tone transmissions with 15 kHz tone spacing
• No support of Turbo code for the downlink• Single transmission mode of SFBC for PBCH, PDSCH, PDCCH• New narrowband channels: NPSS, NSSS, NPBCH, NPDCCH,
NPDSCH, NPUSCH, NPRACHMain radio protocol features:• Single HARQ process• Single HARQ process• Only RLC AM mode with simplified status reporting• Two PDCP options:
SRB 0 and 1 only. No AS security (NAS security is used instead). PDCP operating in TM.
SRB 0, 1, 2 and one DRB. AS security, which is cached upon RRC connection release. RRC connection suspend/resume procedures to maintain AS security context
• Reduced broadcast system information
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Frame and Slot Structure – NB-IoT – 7 symbols per slot
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Transmission bandwidth and delays
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NB-IoT Channels
Frame structure
Signals: PSS, SSS - RS
Broadcast Channel
Dedicated Channels
NPBCH
NPDCCH
NPDSCH
Downlink
Physical Layer
Uplink
Frame structure
Signals: Demodulation reference signals (DMRS)
Random Access
Dedicated Channels
NPRACH
NPUCCH
NPUSCH
Used for data and HARQ feedback
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Physical downlink channels
Maximum Transmission Block Size = 680 bitsInband mode: 100 to 108 symbols – Standalone/Guard band mode: 152 to 160 symbols
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Packets transmission on the PUSCH
Smallest unit to map a transport block: resource unit (RU).
NPUSCH format 1
3.75 kHz subcarrier spacing, an RU = 1 subcarrier in the frequency range, and 16 slots in the time range (length of 32 ms).
15 kHz subcarrier spacing 4 options:
RUs with one subcarrier, BPSK or QPSK,
Other RUs: QPSK.
NPUSCH format 2
RU always composed of one subcarrier with a length of 4 slots.
3.75 kHz subcarrier spacing the RU has an 8 ms duration,
15 kHz subcarrier spacing has an 2 ms duration.
Modulation scheme: BPSK.
UCI: Uplink Control Information
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Downlink Frame Structure
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NB-IoT Repetitions
Consists on repeating the same transmission several times:
Achieve extra coverage (up to 20 dB compared to GPRS)
Each repetition is self-decodable
SC is changed for each transmission to help combination
Repetitions are ACK-ed just once
15 kHz subcarrier spacing.A transport block test word (TW) is transmitted on two RUs
Each RU is transmitted over 3 subcarriers and 8 slots
Example: Repetitions used in NB-IoT in NPDCCH and NPDSCH channels
once
All channels can use Repetitions to extend coverage
DL up to 2048 repetitionsUL up to 128 repetitions
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Repetitions number to decode a NPUSCH
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Physical signals and channels and relationship with LTE
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Peak Data Rates
NDSCH peak data rate achieved with the largest TBS of 680
bits transmitted over 3 ms.
226.7 kb/s peak layer 1 data rate (multitone configuration).
NPUSCH peak data rate achieved with the largest TBS of 1000
bits transmitted over 4 ms.
250 kb/s peak layer 1 data rate (multitone configuration)250 kb/s peak layer 1 data rate (multitone configuration)
and 20 kb/s (single tone configuration).
Peak throughputs of both DL and UL are lower than these
figures when the time offsets between DCI, NPDSCH/NPUSCH,
and HARQ acknowledgment are taken into account.
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Coverage
Maximum coupling loss 20 dB higher than LTE Rel-12. Coverage extension is achieved by trading off data rate
through increasing the number of repetitions. Coverage enhancement is also ensured by introducing
single subcarrier NPUSCH transmission and p/2-BPSKmodulation to maintain close to 0 dB PAPR Reducesthe coverage potential issues due to power amplifierbackoff.
NPUSCH with 15 kHz single-tone gives a layer 1 data rateof approximately 20 b/s when the highest repetition factor
NPUSCH with 15 kHz single-tone gives a layer 1 data rateof approximately 20 b/s when the highest repetition factor(i.e., 128) and the most robust MCS are applied,
NPDSCH gives a layer 1 data rate of 35 b/s with arepetition factor 512 and the most robust MCS.
These configurations support close to 170 dB couplingloss (compared to Rel-12 LTE designed for up toapproximately 142 dB coupling loss).
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Link Budget 15kHz 3.75 kHz
(a) Transmit power (dBm) 23 23
(b) Thermal noise (dBm/Hz) -174 -174
(c) Receiver noise figure (dB) 3 3
(d) Occupied channel bandwidth (Hz) 15 000 3 750
(f) Effective noise power (b)+(c)+10log_10(d) (dBm)
(g) Required SINR (dB) -11.8 -5.7(g) Required SINR (dB) -11.8 -5.7
(h) Receiver sensitivity (c)+(g) (dBm) -141 -141
(i) Maximum coupling loss (a)-(h) 164 164
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23 dB improvement over LTEUrban: Deep in-building penetrationRural: Long rage (10 – 15 km)
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Data transmission options
2 possibilities for data transmission between NB-IoT devices and the AS:1. IP: Depending on the capabilities of the radio module and the
operator, IPv4 and IPv6 are supported. UDP is the common andrecommended transport protocol. On the air interface, TCP is insupported for NB-IoT (and specified in the 3GPP standard), but notrecommended due to the resulting higher data volume. HTTP andHTTPS over the air interface cannot be implemented, because theyrely on TCP and require additional data volume for their overhead.rely on TCP and require additional data volume for their overhead.
2. Non-IP: If possible, a non-IP based data transmission is recommended for NB-IoT because it reduces the transmitted data volume. The is forwarded by the network to the application via IP. Data can only be sent to one target IP address (server).
Application protocols like MQTT, MQTT-SN, COAP and oneM2M can be used.
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Data transmission options
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NB-IoT bands
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Capacity
NB-IoT supports massive IoT capacity with only one PRB in both UL and DL.
NB-IoT can support multiple carrier operation to get more IoT capacity.
Sub-PRB UE scheduled bandwidth is introduced in the uplink, including single-subcarrier NPUSCH.
Based on a traffic model with a split of devices is:
• 80%: MAR (Mobile Autonomous Reporting ) periodic
• 20%: Network Command is MAR periodic.
NB-IoT with one PRB supports more than 52,500 UEs per cell.
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Enhanced DRX for NB-IOT and eMTC
Extended C-DRX and I-DRX operation
• Connected Mode (C-eDRX):
• Extended DRX cycles of 5.12s and 10.24s are supported
• Idle mode (I-eDRX):
• Extended DRX cycles up to ~44min for eMTC
• Extended DRX cycles up to ~3hr for NB-IOT
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Architecture
End Device Email
LTE Access
FrequencyFrequency BandBand Ultra Ultra NarrowNarrow Band Band
RangeRange ~ 11 Km~ 11 Km
ThroughputThroughput ~ 150 Kbps~ 150 Kbps
HD-FDDp/2 BPSK, p/4 QPSKClass 3 (23 dBm)Class 5 (20 dBm)
End Device
New baseband Softwarefor NB-IoT
Remote Monitoring
Customer IT
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Spectrum and access
• Designed with a number of deployment options for GSM , WCDMA or LTEspectrum to achieve spectrum efficiency.
• Use licensed spectrum. Stand-alone operation
Dedicated spectrum.
Ex.: By re-farming GSM channels
Guard band operation
Based on the unused RB within a LTE
carrier’s guard-bandcarrier’s guard-band
In-band operation
Using resource blocks within a normal
LTE carrier
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LTE-M to NB-IoT
3GPP Release 12 (Cat.0)LTE-M
13(Cat. 1,4 MHz) LTE-M
13(Cat. 200 KHz) NB-IoT
Downlink peak rate 1 Mbps 1 Mbps 300 bps to 200kbps
Uplink peak rate 1 Mbps 1 Mbps 144 kbps
Number of antennas 1 1 1
Duplex Mode Half Half Half
UE receive bandwidth 20 MHz 1.4 MHz 200 kHzUE receive bandwidth 20 MHz 1.4 MHz 200 kHz
UE Transmit power (dBm) 23 20 23
• Reduced throughput based on single PRB operation
• Enables lower processing and less memory on the modules
• 20dB additional link budget better area coverage
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IV. State of ArtIV. State of Art
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A. RegulationA. Regulation
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Frequency bands of SRDs
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IoT Bands
2.4 GHz
5 GHz
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IOT regulations
Link Activity rate Power
DL 10% 25 mW
UL 1% 500 mWArcep France
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ISM 868MHz Band Plan
Effective radiated power (mW)
250 kHz
Duty cycle < 1% < 0.1% < 0.1% < 0.1% < 1% < 10% < 10% Up to 100%
868 868.6 868.7 869.2 869.4 869.65 869.7 868.6 870
600 kHz25 mW 100 kHz
5 mW
500 kHz25 mW 100 kHz
10 mW100 kHz10 mW
250 kHz500 mW
600 kHz25 mW 300 kHz, 5 mW
Non specific devices
Application-specific (ex. Alarms)
MHz
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B. PricesB. Prices
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NB-IoT pricing in Deutsche Telekom
1. The NB-IoT Access entry package is available from EUR 199and includes a 6-month activation of up to 25 SIM-cards with500 KB per SIM pooled in Germany’s NB-IoT network. As a
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500 KB per SIM pooled in Germany’s NB-IoT network. As afurther optional add-on – a private APN with IPsec-keyencryption is available.
2. The NB-IoT Access & Cloud of Things entry package isavailable from EUR 299 and additionally includes directaccess to Deutsche Telekom’s Cloud of Things platform fordevice and data management.
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T-Mobile NB-IoT Offer
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SK Telecom completed a nationwide LTE-M rollout in March 2017 but only LoRaWAN services are available.Price plans for LoRaWAN-based IoT services:1. 350 won ($0.30) per month per device for a 100kb allocation2. 2,000 won ($1.77) for a 100MB allocation.Discounts available for multiple lines, ranging from 2% for those using 500 lines for 10% for those using 10,000 lines. Excess data will be charged at 0.005 won per 0.5KB.LoRa plans cost just a tenth of the price of its LTE-based IoT services.
SK Telecom (South Korea) LoRaWan prices
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UnaBiz (Singapore) Sigfox prices
Network subscription charges: US$0.75 per device per month, whichcomes with a data plan for up to 140 messages per day.Qualified channel partners who commit to volume can ultimatelyenjoy subscription charges from as low as US$0.75 per device peryear.
Jonathan Tan, VicePresident BusinessDevelopment & Sales,
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connectivity to grow exponentially the base of devices that can access the network.Compared to existing local networks, businesses on our global network cangenerate savings of at least 90% off data plan subscription charges.”
Development & Sales,UnaBiz said, “Sigfox’stechnology is built formassive deployment and weare offering ultra-low cost
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AT&T LTE-M services pricing
The new prepaid plans, which target developers and
businesses, include three tiers of data and text
messages:
1. 1 gigabyte of data valid for up to 1 year and 500 text
messages for $25;messages for $25;
2. 3 GB of data valid for up to 1 year and 1,000 text
messages for $60;
3. 5 GB of data valid for up to 2 years and 1,500 text
messages for $100.
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Synthesis
Country Operator Technology Price/End-device/month Conditions (/end-device/month)
Germany DT NB-IoTUS$ 1.60 85 KB
US$ 2.40 “ + Cloud
South Korea
SK Telecom LoRaWAN
US$ 0.30 100 KB
US$ 1.77 100 MBKorea Telecom LoRaWANUS$ 1.77 100 MB
Singapore UnaBiz Sigfox US$ 0.75 140 messages
USA AT&T LTE-M
US$ 2.08 83 MB and 42 messages
US$ 5 250 MB and 84 messages
US$ 4,2 210 MB and 63 messages
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LoRaWAN end-devices prices
Interface UARTStack / MAC LoRaWANStack implementation Microchip proprietary
Price $14.27 @ single unit$10.90 @ 1000 units
Interface UARTInterface UARTStack / MAC LoRaWANStack implementation proprietary MultiTechForm factor XBee compatiblePrice ~$30.00 @ single unit
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Quectel GSM/GPRS/UMTS/HSPA/NB-IoT Module€ 60,00
NB-IoT end-devices prices
NB-IoT Quectel BC95AT Commands3GPP Rel-13Interfaces SIM/USIM 1 Transmission 100bps€ 35,00
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Digi XBee Cellular NB-IOTSolution Highlights:Up to ~60Kbps Downlink, 25Kbps Uplink4-7x better range - strong building penetrationSimple 1 antenna design200 mW (23 dBm)Band 20 (800MHz)Band 8 (900MHz
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LTE-M end-devices prices
Digi XBee Cellular LTE-M
Solution Highlights:Up to ~350Kbps Down/Uplink
PSM (Power Saving Mode) and eDRX supported for ultra-low
power consumption
Simple 1 antenna design
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Simple 1 antenna design
200 mW (23 dBm)
Verizon: Band 13 (700MHz) Band 4 (1700MHz)
AT&T: Band 2 (1900MHz) Band 4 (1700MHz) Band 12 (700MHz)
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C. ForecastsC. Forecasts
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Main technologies for LPWANs
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Technologies evolution 2015-2017
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Chipset Shipments Evolution
71
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Evolution of LPWA Modules Sales
72
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Devices prices (2017)
73
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2018 Connections Status
74
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Future of IoT connectivity by network type across the world
NB-IoT will be the dominant network for IoT in 2026 (Analysys Mason)
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2017-2026 IoT standards evolution
76
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2025 forecasts
77
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Share of LPWAN Connections in 2026
78
NB-IoT will have 38% of total connections in 2026, backed by Chinese market
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Forecasts in 2026
79
China will dominate the market by 2026 with 1.1 billion connections
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Thank you!Thank you!Thank you!Thank you!
80