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NRC7292 SoC for 802.11ah Wi Fi HaLow Ultra Low Power, Long Range Wi Fi for IoT

802.11ah(Wi-Fi HaLow) Overview

WI-FI STANDARDS
IEEE 802.11AH (WI-FI HALOW)
COMPARISON OF IOT TECHNOLOGIES
FREQUENCY BAND OF GEOGRAPHICAL AREA
FIELD TEST EXAMPLES

WIFI HALOW STANDARDS

STANDARD & SPECIFICATION

CERTIFICATION & PROMOTION

Characteristics of IEEE 802.11ah HaLow

Frequency Band	License-exempt bands below 1 GHz, excluding the TV white spaces – Example: 863-868.6 MHz (Europe), 915.9 -928.1 MHz (Japan), 755-787 MHz (China), 917- 923.5 MHz (Korea), 866-869 MHz, 920-925 MHz (Singapore), and 902-928 MHz (U.S.)
Channel Width	1/2/4/8/16 MHz
Range	Up to 1Km (outdoor)
End Node Transmit Power	Dependent on regional regulations (from 1 mW to 1 W)
Data Rate	150 Kbps ~ 346.666 Mbps
Devices per Access Point	8,191
Standard Body	IEEE 802.11 working group
Topology	Star, Tree

Ultra-Low Power, Long Range Wi-Fi for IoT

Features or Capabilities	NRC7292 case	Wi-Fi HaLow Key benefits
Sub-GHz radio frequencies	750~950MHz	10x longer range, 100x area, 1000x volume of coverage by single AP Up to 1.5km range of operation Robust connection in noisy environments Better penetration through buildings Capable of battery operation High-density, Low latency No proprietary hubs or gateways Easy FW upgrade over the air (FOTA)
Narrow band, OFDM channels	1,2,4MHz BW, Max 64QAM
Ultra-low power sleep modes	TIM/TWT
Flexible and high data rate	Up-to 15Mbps PHY
Large volume of STA per AP	1080 STA per AP
Enhanced Security	WPA3 & enhancedopen security
Ready for easy internet & cloud connectivity	TCP/IP, IPv6
World-wide open standard	IEEE standard WFA Certification

COMPARISON OF IOT TECHNOLOGIES

	BLE	ZigBee	Z-Wave	Wi-SUN	LoRa	NB-IoT	HaLow (NRC7292)

Power Consumption	Very Low	Very Low	Very Low	Very Low	Very Low	Very Low	Very Low
Frequency	2.4GHz	2.4GHz/Sub-1GHz	Sub-1GHz	Sub-1GHz	Sub-1GHz	Licensed	Sub-1GHz
Data rate	1Mb/s 270kb/s	250kb/s	40kb/s, 100kb/s	300kbps	11kbps, 50kbps	250kbps	15Mbps
Coverage	< 100m	< 20m	< 30m	< 1km	< 10 km	< 10km	< 1.5km
Self Network Configuration	O	O	O	O	X (Operator)	X (Operator)	O
TCP/IP(Internet)	X	X	X	X	X	O	O
Modulation	GFSK	BPSK, OQPSK	BPSK, GFSK	FSK, OFDM, OQPSK	CSS	QPSK	OFDM
Security	AES128	AES128	Security2(s2)	IEE802.1x	AES128	3GPP Security	WPA3
Firmware OTA	O	O	O	O	-	O	O
Main Topology	Scatternet	Mesh	Mesh	Mesh	Star	Star	Star/Tree/Mesh
World Wide De facto Standard	Bluetooth SIG	IEEE 802.15.4	X	IEEE 802.15.4g	X	3GPP LTE Cat-NB1	IEEE 802.11ah

Data Rate vs Range of Unlicensed IoT Connective Technologies

Wi-Fi HaLow provides significant range improvement over 11b/n, BTLE including BT Long Range Modes and Zigbee as well as the data-rate much higher than other LPWAN technologies
Allows direct connect of sensors to APs without professional mesh install

FREQUENCY ALLOCATION IN SOUTH KOREA

Allocated frequency and Tx power

Item		Value
Allocated frequency (MHz)	921 - 923 (USN1)	925 – 931 (USN5)
Allowed Bandwidth (MHz)	1	1, 2
# of Channel @ BW 1MHz	2	4
# of Channel @ BW 2MHz	0	2
Max Tx power e.r.p (mW)	10, 25	50, 100

전파법 기술기준안 개정 완료 (2021.10)
뉴라텍 지원사항: NRM7292B module 전파 인증 (USN1, USN5) 및 무선마이크 신호 회피 알고리즘 FW 제공

Radio Wave Act technical standards revision completed (October 2021)
Newatec support: NRM7292B module radio wave certification (USN1, USN5) and wireless microphone signal avoidance algorithm FW provided

NRC7292 802.11AH SOC – SYSTEM FEATURE

Silicon Process: 40nm CMOS LP; Voltage: 2.6~3.6V
Clock Resources: 32.768kHz OSC& 32MHz OSC; LPO 16MHz/32.768kHz
System PLL (Aux PLL): 96MHz mode only
Application Processor: Cortex-M3(48/32MHz)
Wi-Fi Communication Processor: Cortex-M0(48/32MHz) for LMAC, PHY/RF control
Internal Memory: ROM0 dedicated to CM3 : 32KB & ROM1 dedicated to CM0 : 32KB; SRAM0/1/2 (256KB/256KB/ 224KB) for CM0 & CM3; Instruction Cache Memory : 32KB
Subsystem IPs: AHB – 11ah MAC/PHY, GDMA, HOST I/F(C–SPI), Mailbox; APB – RTC/Clock Control(CKC), PMC(Power Management Controller), WDOG, 4x I2C Master, 2x SSP, 4x HSUART, 8x PWM- 6x TIMER, GPIO, 4x 9-bit ADC

NRM7292B MODULE

Allocated frequency and Tx power

Standard	IEEE 802.11ah-2016	Security	AES-CCMP
Data rate	150Kbps ~ 15Mbps	Voltage	2.8~3.6V(Typical 3.3V)
Frequency	US : 902 ~ 928 MHz Korea : 921~923 / 925 ~ 931 MHz Japan : 920.5 ~ 928.1 MHz	Current	Tx 180mA @50mW Rx 40mA (VBAT=VDD_FEM=3.3V)
Channel Bandwidth	1MHz / 2MHz	Operating Temperature	-40 ~ 85℃
Interface	UART for Host, UART for debugging SPI slave for Host, SPI master I2C master

SYSTEM TARGET

monetization_on

Low Cost

ARM Cortex-M3 for
Client Application
No External Memory
RTC and PMU on Chip

sync_alt

Flexible

Standalone vs. External Host Type
Pre-Power Amp vs. External Power Amp
Host boot vs. XIP boot mode (External Flash Memory)
Both Modes for AP & STA

battery_low

Low Power

Inside PMU (Power Management Unit)
Power Gating Design
Clock Gating Design

EVALUATION KIT

NRM7292B 11ah Wi-Fi module board

Host driver and CLI for host mode
SDK for standalone mode
Both AP and station support
SMA female Antenna connector
SPI/UART for external host interface
i2C/UART/SSP/GPIO for external device interface
Miro-USB type B connector for serial interface

Raspberry Pi 3 model B External Host board

Linux ver. 4.1x with Wi-Fi features
Iper3 EVK performance test tool
802.11n connectivity support

802.11AH APPLICATIONS

IEEE 802.11AH APPLICATIONS
SMART HOME
SMART BUILDING
SMART FACTORY
SMART HEALTHCARE
SMART EV STATION

IEEE 802.11AH APPLICATIONSS

IEEE 802.11ah uses a sub-1GHz bandwidth, which allows a greater coverage of distance up to 1km while transmitting data at reasonable rates. Therefore, it is suitable for almost all IoT applications such as smart home, smart city, smart energy, smart building, smart factory and smart farm.

SMART FACTORY

Advantages

Coverage : 300~500m with max 1080 STA per AP
Mbps throughput enables sensor signal data collection for big data analysis or pattern recognition
Low latency suitable for emergency warning or failure detection

Use cases

Equipment and process monitoring and diagnosis
Realtime sensor data collection (vibration, temp/humidity, strain gauge or gas leakage)
Safety or security (CCTV/Thermal camera)
Factory Energy Management System (FEMS)
Wearable (Helmet camera, Watch, Walky-talky and etc.)

SMART Building

Advantages

One AP can cover about 300m distance and multiple floors
Simple configuration (star or tree topology) for up to 1080 station per AP
Mbps throughput enable large amount of data gathering for big data analysis
Saving Installation cost for wired network and regular fee

Use cases

Tri band Wi Fi AP or IoT hub/gateway
Building energy management system (Meters & gauges)
HVAC & air conditioner
Various sensor devices
Lighting system
Security & surveillance system
Facility & equipment maintenance
Communication between indoor and outdoor unit
Backhaul network for other short range devices(Wi Fi, BT, zigbee , z wave etc.)

SMART HEALTHCARE

Smart healthcare for indoor/outdoor wireless network

Coverage: 300~500 meters for indoor & 1,000 meters for outdoor
IP based simple configuration by 802.11ah with global standard
Remote monitoring for elderly care/independent living & personal fitness of outdoor
Required high data rate for periodic/event based data transferring of indoor pedestrians & mobile devices

SMART EV CHARGING STA. / PARKING LOT

Charging Point Service for Electric Vehicle by long range & high data rate of 802.11ah

Coverage: 1,000 meters for EV information/charging status & 100~300 meters for monitoring camera
IP based simple configuration by 802.11ah with global standard
EV Charging Point service from City Operating Center
Power level & available information
Monitoring and recognizing each Vehicle

SMART HOME

Advantages

Whole home coverage including outdoor area
Mbps quality throughput between AP and IoT devices
Better wall penetration performance
Reaches front door, multi-floor, basement, garage and garden
Complex mesh network for coverage extension is not required
Supports TCP/IP for easy internet connection

Use cases

Sub-GHz HaLow enabled Tri-band Wi-Fi access point
AI speaker with IoT hub
Smart IoT gateway / EMS gateway / dongle
Door lock / door camera
Webcam / surveillance camera (indoor / outdoor)
Smart CE / smart lighting
Smart meters and gauges (Electric, Solar, Water, Gas)
Sensors (security, gas, fire, air quality, temperature)
Remote control and monitoring devices

NRC7292 IEEE 802.11ah Wi-Fi Solution + MCU SoC

Overview

As an optimized Wi-Fi solution for internet of things (IoT) devices, NRC7292 is industry’s first system on a chip (SoC) that is compliant with the IEEE 802.11ah standard. Operating in the Sub 1GHz license-exempt band, it offers a much greater range over 2.4GHz and 5GHz technologies. 1/2/4MHz channel widths with optional short guard interval (SGI) yield 150 Kbps to 15 Mbps PHY throughput which can support lowrate sensor to high-rate surveillance camera application. The protocol’s power-saving mechanisms like a longer sleep time greatly reduces power consumption and hence increase battery life.

The self-contained IEEE 802.11ah Wi-Fi networking capabilities with fully integrated radio transceiver of NRC7292 offers the ideal solution to add Wi-Fi connectivity to IoT products. It minimizes the PCB size, requires minimal external circuitries, and enables fast time-to-market.

The RF transceiver is a complete radio front-end optimized for Sub 1GHz band and it has fully integrated pre-power amplifiers as well as the capability to support various commercial external FEM device. With the dual embedded ARM Cortex-M0 and Cortex-M3 processor, NRC7292 can be used either as a standalone device or a slave to a host processor via serial peripheral interface (SPI) or universal asynchronous receiver transmitter (UART) interface. In addition, it can support both AP and STA roles.

Target Applications

IoT applications
Wearables
Home automation
Healthcare
Industrial automation
Safety and security
Smart grid
Multimedia streaming

Specification

CPU: ARM Cortex-M3 for Application; ARM Cortex-M0 for WLAN; Mailbox for communication
Memory: 32KB Boot ROM for M0; 32KB Boot ROM for M3; 752KB System SRAM; XIP with cache (2 ways, 32KB)
Communication Peripherals: GPIO X 54; SPI X 4; UART X 4; I2C X 4; 9-bit ADC X 4
RF Transceiverr: Single-ended RF ports; Frequency band: 750 to 950MHz; Linear TX output power: 0dBm; TX gain range: 30dB; RX noise figure: <4dB; Max. input level: -10dBm; 10bits ADC and DAC

Key Features

Complies with IEEE 802.11ahTM-2016
Fully Integrated on-chip 11ah modem, RF transceiver, processor, and memory
Support 1/2/4 MHz bandwidth
Up to 15 Mbps data rate
Travelling pilot for Doppler spread
Low power mode operation
- Legacy
- WMM-PS
- TWT
AES-CCMP security
Dedicated SPI and UART interface for host
Various peripheral interfaces for sensor device
Manufacturing tools for configuration and test
Diagnostic and DUT test tools for indoor and outdoor test