Mobile Broadband Communications

Mobile Broadband Communications (WiMAX & LTE) Teaching By Asst.Prof.Dr. Suwat Pattaramalai suwat.pat@kmutt.ac.th Tel. 02-470-9079

3GPP WiMAX FORUM

Mobile Broadband Communications Contents Part I Fundamentals of Wireless Communication and IP Networking Introduction to Mobile Broadband Basics of All-IP Networking Part II Theory of OFDMA and MIMO Principles of OFDM Principles of OFDMA Multiple Antenna System SC-FDMA Part III Applications of IP-OFDMA WiMAX Physical, MAC, and Network Layers Long-Term Evolution of 3GPP Ultra Mobile Broadband of 3GPP2 Drivers of Convergenct

Introduction to Mobile Broadband

Introduction to Mobile Broadband Introduction Before 3G and Broadband Cellular Communication Broadband and WLAN/WiFi 3G and Broadband Wireless The 3GPP Family The 3GPP2 Family Broadband Wireless Access Mobile WiMAXand 4G Key Features Mobile Broadband Market Summary

Introduction to Mobile Broadband Evolution of wireless technology 1G Basic mobile voice (lacked uniform standardization) 2G Capacity and coverage (different frequency allocation US&Europe) 3G higher data speed 4G Truly Mobile broadband experience Broadband: high speed Internet (data, voice, and video) IP-based network Mobile broadband WiMAX, LTE (Long Term Evolution), UMB (Ultra Mobile Broadband) Internet Engineering Task Force (IETF), Third Generation Partnership Project (3GPP), Institute of Electrical and Electronics Engineers (IEEE), WiMAX Forum 4G definition Data rate 100Mbps for high mobility (mobile access) and 1 Gbps for low mobility (nomadic/local access)

Note: 1Gbps can be reached by using larger antenna arrays and with frequency bands above 100MHz

Introduction to Mobile Broadband Before 3G and Broadband Cellular Communication Advanced Mobile Phone System (AMPS) in 1980s: analog FDMA-based system for voice through 30 khz FM modulated channels Global System for Mobile Communication (GSM) in Europe: digital communication TDMA&slow frequency hopping for voice Interim Standard-136 (IS-136): TDMA&FDMA, PSK modulation cdmaone IS-95: direct-sequence CDMA, PSK modulation, coding General Packet Radio Service (GPRS) peak data rate 140kbps Enhanced Data rates for GSM Evolution (EDGE) up to 384kbps with adaptive modulation and coding (AMC) Broadband and WLAN/WiFi Digital Subscriber Line (DSL): Orthogonal Frequency Division Multiplexing (OFDM), sdsl, ADSL 60% of all (Download 8Mbps), ADSL2plus (up to 24Mbps) For Internet connection, Internet Protocol Television (IPTV) Data Over Cable Service Interface Specification (DOCSIS): cable modem CableLabs: PacketCable built over DOCSIS for real-time multimedia, IP telephony, Video on Demand (VoD), HDTV Fiber-to-the-home (FTTH), fiber-to-the-node (FTTN), fiber-to-the-curb (FTTC), hybrid fiber-coaxial (HFC)

Introduction to Mobile Broadband Before 3G and Broadband Broadband and WLAN/WiFi Wireless Local Area Networking (WLAN): limited mobility, small range, nomadic users, ISM (Industrial, Scientific, and Medical) band at 900MHz, 2.4GHz, and 5.8GHz, U-NII (Unlicensed National Information Infrastructure) band at 5GHz IEEE 802.11 framework» 802.11b at 2.4GHz 83.5MHz spectrum 11Mbps» 802.11a at 5GHz 300MHz spectrum OFDM 54Mbps» 802.11g at 2.4GHz 300MHz spectrum OFDM 54Mbps» 802.11e addressed QoS» 802.11n accommodate MIMO with OFDM HiPERLAN(High Performance Radio LAN) in Europe, as IEEE802.11a Wi-Fi alliance: nonprofit industry association last feet broadband connectivity 3G and Broadband Wireless: mobility and high speed data rate The 3GPP Family Universal Mobile Telecommunication (UMTS): based on Wideband Code Division Multiple Access (WCDMA) in 2000 offer 5MHz bandwidth

Introduction to Mobile Broadband 3G and Broadband Wireless The 3GPP Family High Speed Downlink Packet Access (HSDPA): IP Multimedia Subsystem (IMS) and IP UMTS Terrestrial Radio Access Network (UTRAN), High Speed Uplink Packet Access (HSUPA) in 2005, Multimedia Broadcast Multicast Service (MBMS) and combination of HSDPA and HSUPA to HSPA Rel-7 MIMO, flat-ip based BTS, GPRS Tunneling Protocol (GTP) for connect packet switched network to radio access network to be HSPA+ with 64QAM with MIMO, Continuous Packet Connectivity (CPC) for data users to synchronized and power control HSPA+ integrated the RNC (Radio Network Controller) to NodeB(base station) The 3GPP2 Family EV-DO (Evolution-Data Optimized) series of CDMA2000, CDMA2000 1xEV-DO in 2001 as IMT2000 as CDMA2000 High Rate Packet Data (HRPD), the first mobile broadband deployed. Rel-0 provide 2.4Mbps in forward link (FL) and 153kbps in reverse link (RL) with 1.25MHz FDD (Frequency Division Duplexing) carrier, commercial average throughput 300-700kbps in FL and 70-90kbps in RL, support IP-based network connectivity, using Adaptive Modulation and Coding and Hybrid-ARQ CDMA2000 1xEV-DO rev-a, delay sensitive, real-time, OFDM for multicasting, All-IP based, VoIP, peak rate 3.1Mbps (800k) in FL and 1.8Mbps (400k) in RL Rev-B, multiple channels, 15ch 20MHz 46.6Mbps FL and 27Mbps RL

Introduction to Mobile Broadband 3G and Broadband Wireless Broadband Wireless Access (BWA) Fixed WiMAX, Local Multipoint Distribution Systems (LMDS) alternative to fiber and cable using 28 & 31GHz LOS (line-of-sight), Multichannel Multipoint Distribution Systems (MMDS or Wireless Cable) at 2.5GHz DOCSIS+ LOS IEEE802.16 for Wireless Metropolitan Area Network (Wireless MAN) and HiPERMAN(High Performance Radio Metropolitan Area Network) by ETSI: LMDS at 10-66GHz LOS and non-los (NLOS) at 2-11GHz IEEE802.16a 2003, single-carrier, OFDM and OFDMA for fixed NLOS IEEE802.16-2004 for fixed WiMAX, IEEE802.16e-2005 for mobile WiMAX WiMAX forum, end-to-end standard for fixed and mobile WiMAX

Introduction to Mobile Broadband Mobile WiMAX and 4G OFDMA provides higher rate, Quality of Service (QoS), Adaptive Modulation and Coding (AMC), Hybrid-ARQ, fast scheduling, and bandwidth efficient handover, currently TDD (Time Division Duplexing) at 2.5 GHz, tolerance to multipath and self-interference, Frequency selective scheduling and fractional frequency reuse, MIMO, high bandwidth efficiency WiMAX, LTE, UMB are based on OFDMA and IP services

Introduction to Mobile Broadband Key Features

Introduction to Mobile Broadband Mobile Broadband Market Higher data rate and higher spectral efficiency for data services Broadband data services increase ARPU (Average Revenue Per User) such as mobile content, entertainment, advertising, MMS, video, etc. Mobile Broadband is an alternative connection besides ADSL and Cable connection User friendly handsets and applications, mobile music, multimedia messaging, gambling, and mobile TV IP Multimedia Subsystem (IMS) is a key role for mobile broadband WiMAX, LTE, UMB, CDMA2000, WLAN/WiFi, cable, xdsl, etc.

Introduction to Mobile Broadband Summary

Cellular Concept Handover Cellular Deployment Spectral Efficiency Digital Communication Source Coding, Channel Coding, Error Detection Coding, Forward Error Correction, Hard and Soft Decision Decoding, Puncturing, Hybrid ARQ, Interleaving, Encryption and Authentication, Digital Modulation Wireless Channel Pathloss, Shadowing, Fading, Delay Spread, Coherence Bandwidth, Doppler Spread, Coherence Time, Channel Models Diversity Techniques Multiple Access Schemes OFDMA Duplexing: TDD, H/FDD Architectures Wireless Backhauling Summary

Cellular Concept

Cellular Concept Handover

Cellular Concept Cellular Deployment

Spectral Efficiency

Digital Communication Source Coding

Digital Communication Channel Coding

Digital Communication Error Detection Coding

Digital Communication Puncturing :remove some parity bits to increase the coding rate Hybrid ARQ

Digital Communication

Digital Communication Encryption and Authentication Advanced Encryption Standard (AES)

Digital Communication Digital Modulation

Wireless Channel

Wireless Channel Pathloss

Wireless Channel Pathloss: Hata-Okumura Model

Wireless Channel Pathloss

Wireless Channel Pathloss: Erceg Model

Wireless Channel Pathloss

Wireless Channel Shadowing

Wireless Channel Fading

Wireless Channel Doppler Shift

Wireless Channel Delay Spread

Wireless Channel Fading

Wireless Channel Delay Spread, Coherence Bandwidth, Doppler Spread, Coherence Time

Wireless Channel: Channel Model

Wireless Channel: Channel Model Standford University Interim (SUI) Channel Model

Wireless Channel: ITU Channel Model

Diversity Techniques

Multiple Access Schemes

OFDMA

Duplexing: TDD, H/FDD Architectures

Wireless Backhauling

Summary Wireless Cellular System: coverage area, reusing the same frequency by Cell splitting, Micro/Macro Cell, Sectorization, Femtocells and picocells, and Multi-antenna Systems Digital communication: source and channel coding, error detection and error correction, puncturing, interleaving and modulation, HARQ Wireless Channel: diffraction, scattering, reflection cause statistical parameters: Delay spread, Coherence bandwidth, Doppler spread, Coherence time, Flat and frequency selective fading, Slow and fast fading Medium access techniques: TDMA, FDMA, CDMA, Random access, OFDMA Wireless Backhauling