Wireless Notes
HubBeamforming Analog Digital Hybrid 5G ImplementationCognitive Radio Dynamic Spectrum Access SensingEdge Computing in Wireless MEC 5G IntegrationMassive MIMO 5G Technology Benefits DeploymentMIMO Systems Spatial Multiplexing Diversity CapacityNetwork Slicing 5G Virtual Networks Use CasesSoftware Defined Radio SDR Architecture ApplicationsAntenna Arrays Phased Arrays and BeamformingAntenna Basics in Wireless CommunicationAntenna Parameters Gain Directivity Beamwidth EfficiencyDipole Antenna Half-Wave Dipole in Wireless CommunicationHorn Antenna Types Working and ApplicationsMicrostrip Patch Antenna Design and ApplicationsMonopole Antenna Quarter-Wave Ground PlaneSmart Antennas MIMO and Massive MIMO SystemsCell Splitting Technique in Cellular NetworksCellular Concept in Mobile CommunicationFrequency Reuse in Cellular NetworksHandoff Techniques in Cellular NetworksCellular Network Planning Coverage Capacity OptimizationRoaming in Cellular NetworksSectoring in Cellular NetworksBandwidth in Wireless CommunicationElectromagnetic Spectrum in Wireless CommunicationFading in Wireless CommunicationFrequency and Wavelength in Wireless CommunicationNoise and Interference in Wireless CommunicationPath Loss in Wireless CommunicationRadio Wave Propagation in Wireless CommunicationSignal Transmission in Wireless CommunicationCellular Network Interview Questions Planning Handoff 5GModulation Interview Questions ASK FSK PSK QAM OFDMWireless Communication Cheatsheet All Formulas Quick ReferenceWireless Communication Interview Questions Top 50 Q&AAdvantages and Disadvantages of Wireless CommunicationApplications of Wireless CommunicationHistory of Wireless CommunicationWhat is Wireless CommunicationWireless vs Wired CommunicationIndustrial IoT IIoT Communication Industry 4.0IoT Case Studies Real-World Implementations Success StoriesIoT Communication Basics Protocols Architecture ConnectivityMQTT Protocol IoT Messaging Publish Subscribe QoSSmart Home Communication Protocols Matter ThreadWireless Sensor Networks WSN Architecture Applications1G Technology First Generation Mobile Communication2G Technology GSM Digital Revolution SMS3G Technology WCDMA HSPA Mobile Broadband4G LTE Technology True Mobile Broadband5G Technology NR Architecture Use CasesBeyond 5G and 6G Future Wireless CommunicationMobile Generation Comparison 1G 2G 3G 4G 5G Complete TableAmplitude Modulation AM in Wireless CommunicationASK Amplitude Shift Keying in Digital CommunicationFrequency Modulation FM in Wireless CommunicationFSK Frequency Shift Keying in Digital CommunicationModulation Techniques Comparison Complete TablePhase Modulation PM in Wireless CommunicationPSK Phase Shift Keying in Digital CommunicationQAM Quadrature Amplitude Modulation Complete GuideQPSK Quadrature Phase Shift Keying ModulationMultiple Access Techniques Comparison FDMA TDMA CDMA OFDMA SDMACDMA Code Division Multiple AccessFDMA Frequency Division Multiple AccessOFDMA Orthogonal Frequency Division Multiple AccessSDMA Space Division Multiple AccessTDMA Time Division Multiple AccessBluetooth LED Control Project BLE Arduino ESP32 AppESP8266 IoT Weather Station WiFi Sensors Cloud DashboardMQTT Smart Home Project Multi-Room Control DashboardWiFi Based Home Automation Project ESP32 MQTT App ControlWireless Sensor Network Project LoRa Multi-Node MonitoringWireless Weather Station Project Multi-Sensor Solar DisplayWireless Communication Formulas and Equations ReferenceFurther Reading and Resources for Wireless CommunicationsWireless Communication Glossary A to Z Terms DefinitionsWireless Standards and Protocols IEEE 3GPP ITU ReferenceCommunication Satellites Types HTS and Satellite InternetGPS System Working Segments Accuracy GNSSSatellite Communication Applications Broadcasting InternetSatellite Communication Basics System Components Link BudgetSatellite Link Design Link Budget C/N Rain FadeSatellite Orbits GEO MEO LEO Types and ComparisonFree Space Propagation Model in Wireless CommunicationMultipath Propagation in Wireless CommunicationRayleigh Fading Model in Wireless CommunicationReflection Refraction Diffraction in Wireless CommunicationRician Fading Model in Wireless CommunicationShadowing Log-Normal Fading in Wireless CommunicationWireless Channel Models Complete OverviewBluetooth Technology Versions BLE ApplicationsInfrared Communication Working Types ApplicationsLoRa and LoRaWAN Long Range IoT CommunicationNFC Near Field Communication Working ApplicationsWiFi Technology IEEE 802.11 Complete GuideWiMAX IEEE 802.16 Technology and Comparison with LTEZigbee Low Power Mesh Network IoT Smart HomeWireless Authentication Techniques PSK 802.1X EAP 5G-AKAWireless Security Best Practices Checklist GuidelinesWEP Wired Equivalent Privacy Why it FailedWireless Attacks Types Methods PreventionWireless Security Basics Threats Principles OverviewWPA and WPA2 TKIP AES-CCMP Enterprise SecurityWPA3 SAE Enhanced WiFi Security Forward Secrecy
Complete reference of wireless standards IEEE 802.11, 3GPP releases LTE 5G NR, ITU specifications, Bluetooth Zigbee LoRa standards, and protocol stacks for engineering students.
A comprehensive reference to wireless communication standards bodies, key protocols, standard numbering systems, and how IEEE 802.11, 3GPP LTE/5G, ITU-R recommendations, and other standards relate to each other.
Major Standards Bodies
IEEE (Institute of Electrical and Electronics Engineers)
| Standard Family | Technology | Key Standards |
|---|---|---|
| IEEE 802.11 | WiFi (WLAN) | 802.11a/b/g/n/ac/ax/be |
| IEEE 802.15.1 | Bluetooth | Based on Bluetooth SIG specs |
| IEEE 802.15.4 | Low-rate WPAN | Zigbee, Thread physical layer |
| IEEE 802.16 | WiMAX (MAN) | 802.16d (fixed), 802.16e (mobile) |
| IEEE 802.22 | Cognitive radio (WRAN) | TV white space access |
IEEE focuses on the physical (PHY) and medium access control (MAC) layers — the "air interface" specifications.
3GPP (3rd Generation Partnership Project)
3GPP is a collaboration of seven regional telecommunications standards organizations that develops cellular mobile standards:
| Release | Year | Technology | Key Features |
|---|---|---|---|
| Release 99 | 1999 | UMTS/WCDMA (3G) | 384 kbps data, soft handover |
| Release 5 | 2002 | HSDPA | 14.4 Mbps downlink, shared channel |
| Release 8 | 2008 | LTE (4G) | OFDMA, 100 Mbps, flat architecture |
| Release 10 | 2011 | LTE-Advanced | Carrier aggregation, 1 Gbps |
| Release 15 | 2018 | 5G NR (Phase 1) | eMBB, NSA/SA, mmWave |
| Release 16 | 2020 | 5G NR (Phase 2) | URLLC, V2X, NR-U |
| Release 17 | 2022 | 5G Advanced | NTN, RedCap, XR |
| Release 18 | 2024 | 5G-Advanced | AI/ML, ambient IoT |
3GPP defines the COMPLETE system — from air interface to core network to services.
ITU (International Telecommunication Union)
The ITU is a United Nations agency that coordinates global telecommunications:
| Division | Role | Key Documents |
|---|---|---|
| ITU-R (Radiocommunication) | Spectrum allocation, radio regulations | Radio Regulations, IMT requirements |
| ITU-T (Telecommunication) | Network standards, quality | G-series (transmission), H-series (multimedia) |
| ITU-D (Development) | Bridging digital divide | Policy frameworks, developing countries |
ITU-R defines IMT (International Mobile Telecommunications) requirements that 3GPP standards must meet:
- IMT-2000 → Requirements met by 3G (UMTS, CDMA2000)
- IMT-Advanced → Requirements met by 4G (LTE-Advanced)
- IMT-2020 → Requirements met by 5G NR
Other Important Bodies
| Body | Focus | Key Standards |
|---|---|---|
| IETF | Internet protocols | TCP/IP, HTTP, TLS, QUIC |
| Bluetooth SIG | Bluetooth | BT Classic, BLE, Bluetooth Mesh |
| Wi-Fi Alliance | WiFi certification | WPA2/WPA3, WiFi 6/7 certification |
| LoRa Alliance | LoRaWAN | LoRaWAN specification |
| Zigbee Alliance (CSA) | Zigbee, Matter | Zigbee 3.0, Matter 1.x |
| ETSI | European telecom | MEC, NFV, TETRA |
| O-RAN Alliance | Open RAN | Open fronthaul, RIC |
WiFi Standards Reference (IEEE 802.11)
| Standard | Year | Band | Max Rate | Channel Width | Key Feature |
|---|---|---|---|---|---|
| 802.11b | 1999 | 2.4 GHz | 11 Mbps | 22 MHz | First mass-market WiFi |
| 802.11a | 1999 | 5 GHz | 54 Mbps | 20 MHz | OFDM, higher speed |
| 802.11g | 2003 | 2.4 GHz | 54 Mbps | 20 MHz | OFDM at 2.4 GHz |
| 802.11n (WiFi 4) | 2009 | 2.4/5 GHz | 600 Mbps | 40 MHz | MIMO (up to 4×4) |
| 802.11ac (WiFi 5) | 2013 | 5 GHz | 6.93 Gbps | 160 MHz | MU-MIMO DL, 256-QAM |
| 802.11ax (WiFi 6) | 2020 | 2.4/5/6 GHz | 9.6 Gbps | 160 MHz | OFDMA, BSS coloring |
| 802.11be (WiFi 7) | 2024 | 2.4/5/6 GHz | 46 Gbps | 320 MHz | MLO, 4096-QAM |
Cellular Standards Quick Reference
| Generation | Air Interface | Multiple Access | Key Specs |
|---|---|---|---|
| 1G | AMPS, NMT, TACS | FDMA | Analog FM, 30 kHz channels |
| 2G | GSM, IS-136 | TDMA/FDMA | Digital, 200 kHz, 8 timeslots |
| 2G | IS-95 (cdmaOne) | CDMA | 1.25 MHz, spread spectrum |
| 3G | WCDMA/UMTS | WCDMA | 5 MHz, 384 kbps-42 Mbps |
| 3G | CDMA2000 | CDMA | 1.25 MHz, 3.1 Mbps |
| 4G | LTE | OFDMA/SC-FDMA | 20 MHz, 100 Mbps-1 Gbps |
| 5G | NR | OFDMA (CP-OFDM) | 100/400 MHz, 10-20 Gbps |
How Standards Relate
The Standards Hierarchy
ITU-R (IMT Requirements)
└── Defines targets (speed, latency, connections)
└── 3GPP develops specifications meeting those targets
└── 3GPP specs reference IEEE standards where applicable
└── IETF protocols used for IP networking within 3GPP core
└── Wi-Fi Alliance certifies interoperability
Example: A 5G Phone Call Using WiFi Calling
- ITU-R allocated the spectrum (IMT-2020 framework)
- 3GPP specified the 5G NR air interface and IMS voice architecture
- IEEE 802.11 specified the WiFi air interface
- IETF specified SIP (voice signaling) and RTP (voice media) protocols
- Wi-Fi Alliance certified the phone's WiFi interoperability
- 3GPP defined how WiFi integrates with 5G core (non-3GPP access)
Important Protocol Relationships
| Protocol Layer | Cellular (3GPP) | WiFi (IEEE) | IoT |
|---|---|---|---|
| Physical | NR, LTE | 802.11ax/be | 802.15.4, LoRa |
| MAC | NR MAC | 802.11 MAC | 802.15.4 MAC |
| Network | GTP, IP | IP | 6LoWPAN, IPv6 |
| Transport | TCP, UDP, QUIC | TCP, UDP | CoAP, MQTT |
| Security | NAS security, IPsec | WPA3 | DTLS, AES-CCM |
| Application | SIP/IMS, HTTP/2 | HTTP/HTTPS | MQTT, CoAP |
Key Takeaways
- ITU-R defines high-level requirements (IMT-2000/Advanced/2020) while 3GPP develops the actual cellular specifications that meet those requirements
- IEEE 802 standards focus on PHY and MAC layers (air interface), while 3GPP specifies complete end-to-end systems including core network
- WiFi generations (WiFi 4/5/6/7) correspond to IEEE standards (802.11n/ac/ax/be) with Wi-Fi Alliance handling certification and marketing names
- 3GPP releases are the definitive reference for cellular — each release adds new features while maintaining backward compatibility
- Multiple standards bodies collaborate on modern systems — a 5G phone uses ITU spectrum, 3GPP air interface, IETF protocols, and IEEE WiFi simultaneously
- Standards enable interoperability — any 5G phone works with any 5G base station because both follow identical 3GPP specifications
- Understanding the standards landscape helps engineers find the right specification document for any technical question about wireless systems
Continue the lesson path
Study next in this module
01ResourcesWireless Communication Glossary A to Z Terms DefinitionsComplete A-Z glossary of 200+ wireless communication terms and definitions covering antenna, modulation, cellular, 5G, WiFi, IoT, security, and satellite terminology for quick reference.02ResourcesFurther Reading and Resources for Wireless CommunicationsComprehensive collection of recommended textbooks, online courses, simulation tools, YouTube channels, research papers, and learning paths for wireless communication engineering students.03ResourcesWireless Communication Formulas and Equations ReferenceComplete reference of wireless communication formulas including path loss, Shannon capacity, antenna gain, modulation BER, cellular reuse, fading channel, and link budget equations for engineering students.04FundamentalsFrequency and Wavelength in Wireless CommunicationLearn frequency and wavelength relationship with formulas, calculations, solved examples, time period, units, antenna size relationship, and practical applications in wireless communication for engineering students.