HCIP-IoT key terms

A three-tier model: the perception layer collects physical data through sensors and actuators, the network layer transports it over connectivity protocols, and the application layer processes and presents it to end users and business systems.

An intermediate device that aggregates data from local sensors, translates between short-range protocols and wide-area networks, and often performs local filtering, buffering, and protocol conversion before forwarding to a cloud platform.

The process by which a gateway or platform converts device-specific data formats and transport protocols into a common standardized representation so heterogeneous devices can be managed and consumed uniformly.

A lightweight publish-subscribe messaging protocol using a broker, with three QoS levels and retained messages, widely used for constrained IoT devices because it minimizes bandwidth and keeps long-lived sessions over unreliable links.

A UDP-based request-response protocol modeled on HTTP, using compact binary headers, confirmable messages, and observe support, designed for constrained nodes and low-power lossy networks.

A device management protocol built on CoAP that defines standard object and resource identifiers for remote provisioning, firmware update, and telemetry, commonly used with NB-IoT and other cellular IoT devices.

An IEEE 802.15.4-based mesh networking standard operating in the 2.4 GHz band, offering low data rate and low power, with coordinator, router, and end-device roles for home and building sensor networks.

The radio specification underlying ZigBee and 6LoWPAN, defining low-rate, low-power physical and MAC layers in sub-GHz and 2.4 GHz bands with CSMA/CA channel access and 16-bit or 64-bit addresses.

A topology in which nodes relay traffic for one another, extending coverage and providing redundant paths; routing protocols such as AODV or ZigBee tree routing select multi-hop routes dynamically.

A short-range radio technology optimized for very low power, using advertising and connection modes with GATT profiles; common in wearables, beacons, and provisioning of smart home devices.

The Generic Attribute Profile organizes BLE data as services and characteristics with defined permissions; clients discover and read or write characteristic values and subscribe to notifications using handles.

A many-to-many BLE networking model where relay nodes forward messages across a managed flood network, using element and model abstractions and provisioner-assigned addresses for lighting and building control.

Radio frequency identification uses a reader and a tag with an antenna; passive tags harvest energy from the reader field, and backscatter modulates the carrier to return an identifier, enabling contactless inventory tracking.

Near field communication is a short-range RFID derivative operating at 13.56 MHz over a few centimeters, supporting card emulation, reader/writer, and peer-to-peer modes for payment and tap-to-pair interactions.

A WLAN standard introducing OFDMA, uplink and downlink MU-MIMO, and target wake time, improving spectral efficiency and battery life for dense IoT deployments such as campuses and factories.

A 3GPP cellular LPWAN standard using a 180 kHz bandwidth, supporting extended coverage, massive connection density, and power saving modes, typically deployed in-band, guard-band, or standalone within LTE spectrum.

A 3GPP LPWAN variant using 1.4 MHz bandwidth that supports higher throughput than NB-IoT, voice, and connected-mode mobility such as handover, suiting wearables and tracking devices needing moderate rates.

A chirp spread spectrum physical layer in unlicensed sub-GHz bands, trading data rate for sensitivity and range through spreading factors; typically paired with the LoRaWAN MAC layer and operated on private networks.

An open MAC-layer protocol over LoRa defining device classes A, B, and C, join procedures via OTAA or ABP, and network, join, and application server roles for wide-area sensor networks.

In LoRa, a parameter from 7 to 12 that determines chirp duration; higher values increase range and sensitivity but reduce data rate and require longer airtime, so the gateway must manage interference across factors.

A cellular IoT feature where the device negotiates an idle period during which it deregisters from the network but retains its context, waking only for scheduled or mobile-originated traffic to save battery.

Extended Discontinuous Reception lengthens the paging cycle beyond normal DRX, letting a device sleep for long intervals while remaining reachable, balancing downlink latency against battery consumption.

Low-power wide-area networks trade throughput for long range and multi-year battery life, spanning licensed cellular options like NB-IoT and eMTC and unlicensed options like LoRa and Sigfox.

The accounting of transmit power, antenna gains, path loss, and receiver sensitivity that determines whether a radio link closes; it explains why LPWAN technologies achieve ranges of several kilometers.

A cloud service that registers devices, manages their lifecycle and credentials, ingests telemetry, exposes APIs to applications, and offers rule engines and data forwarding, acting as the middleware between devices and business systems.

A platform-side model describing a device type: its service capabilities, properties, commands, and data types, used to decode uplink payloads and validate downlink commands consistently across many devices.

A plugin or script on the platform that converts between binary or proprietary device payloads and structured JSON properties, enabling compact over-the-air formats while keeping applications readable.

A cloud-stored JSON document holding reported and desired states for a device; applications read or update it even when the device is offline, and the device synchronizes on reconnection.

A virtual representation of a physical asset that mirrors its state and behavior, fed by telemetry and used for simulation, anomaly detection, and predictive maintenance across its lifecycle.

Remote delivery and installation of device firmware through the platform, requiring version management, staged rollout, integrity verification, and rollback handling to avoid bricking large device fleets.

Processing data near its source on gateways or edge nodes rather than only in the cloud, reducing latency and backhaul cost and enabling local autonomy when connectivity is intermittent or unavailable.

A lightweight real-time operating system for constrained IoT devices, providing task scheduling, inter-task communication, timers, and a sensor abstraction framework, with a small footprint suited to MCUs.

An isolated, packaged runtime bundling an application with its dependencies, enabling consistent deployment of edge applications and independent lifecycle management on gateway hardware.

A boot chain that verifies the cryptographic signature of each firmware stage before execution, preventing unauthorized or tampered images from running on the device.

The unique credential and identifier a device presents to authenticate with a platform, typically a device ID plus secret, certificate, or derived key, underpinning authorization and access control.

Transport Layer Security and its datagram variant encrypt and authenticate IoT sessions; DTLS suits UDP transports such as CoAP, while TLS secures MQTT over TCP with mutual certificate authentication.

The Wi-Fi security standard introducing SAE to resist offline dictionary attacks, forward secrecy, and protected management frames, recommended over WPA2 for IoT WLAN deployments.

An adaptation layer that compresses IPv6 headers and fragments packets so IPv6 can run over IEEE 802.15.4 links, enabling end-to-end IP addressing for constrained sensor nodes.

An IPv6-based mesh networking protocol for home devices built on IEEE 802.15.4, using 6LoWPAN compression and a border router to connect the mesh to the wider network.