Bài giảng Thông tin di động: Mạng thông tin di động 3G - TS. Đỗ Trọng Tuấn được biên soạn gồm các nội dung chính sau: Kỹ thuật thông tin; Mạng thông tin di động 3G; Khái quát về UMTS. Mời các bạn cùng tham khảo bài giảng dưới đây để nắm được nội dung chi tiết nhé!
Trường Đại học Bách Khoa Hà Nội Khoa Điện tử Viễn thông Thông tin di động Mobile Communications TS Đỗ Trọng Tuấn Bộ môn Kỹ thuật thông tin Hà Nội, 9-2010 Mạng thông tin di động 3G UMTS / W-CDMA (Universal Mobile Telecommunications System) ξ Khái quát UMTS 2 Rel.99, Rel.4 IMT-2000 : ITU’s umbrella name for 3G which stands for International Mobile Telecommunications 2000 IMT-DS Direct Spread CDMA: W-CDMA / UMTS New from 3GPP; UTRAN FDD 3 WCDMA Background and Evolution 3GPP Rel -99 12/99 2000 Japan 3GPP Rel 03/01 2001 2002 Europe (precommercial) 3GPP Rel 2H/04 3GPP Rel 03/02 2003 2004 Europe (commercial) 2005 HSDPA (commercial) 3GPP Rel 06/07 2006 Further Releases 2007 HSUPA (commercial) UMTS general characteristics Multimedia Service & high data rates: WCDMA radio access Environment Max Bitrate Max Speed Cell Size Rural outdoor 144 Kbps 500 Km/h Macro Suburban outdoor 384 Kbps 120 Km/h Macro/Micro Indoor 2.048 Mbps 10 Km/h Micro/Pico Support of QoS mechanisms Volume-based pricing scheme Service flexibility, wide bit-rate range and granularity: Packet- and Circuit- oriented services, “always on” connectivity, multiple services on one connection, Additional requirements: Dual- mode/ coexistence with GSM & inter-system Hand Off, Channel characteristics negotiation 5 IMT-2000 Vision Includes LAN, WAN and Satellite Services Global Satellite Suburban Macrocell Urban Microcell In-Building Picocell Basic Terminal PDA Terminal Audio/Visual Terminal UMTS Characteristics UMTS FDD (Frequency Division Duplex) Uplink: 1920 - 1980 MHz Downlink: 2110 - 2170 MHz 190 MHz duplex distance 5MHz (variable) carrier spacing 12 bands in Uplink & Downlink 12 Uplink Bands 12 Downlink Bands … … 190 MHz 5 MHz Frequency 7 Ngày 16/4/2008, Bộ TT&TT ban hành Quyết định số 25/2008/QĐ-BTTTT việc phê duyệt Quy hoạch băng tần cho hệ thống thông tin di động tế bào số Việt Nam dải tần 821 ÷ 960 MHz 1710 ÷ 2200 MHz Theo Quyết định này, đoạn băng tần 1900 ÷ 1980 MHz, 2010 ÷ 2025 MHz 2110 ÷ 2170 MHz dành cho hệ thống IMT–2000 Hiện giấy phép 3G ấn định kênh tần số cho hướng xuống (trong dải 2110 ÷ 2170 MHz) kênh tần số cho hướng lên (trong dải 1920 ÷ 1980 MHz) 8 UMTS Specifications Duplex method: FDD Channel spacing: MHz Carrier chip rate: 3.84 Mcps Timeslot structure: 15 slots/frame Framelength: 10 ms Modulation: QPSK Detection: based on pilot symbols Intra-frequencyHandover: soft Inter-frequencyHandover: hard Spreading Factors: 4, 8, 16, 32, 64, 128, 256, 512 9 UMTS Network Architecture 10 10 UMTS Network Architecture 11 11 UMTS Network Architecture RNS: Radio Network Subsystems UTRAN: UMTS Radio Access Network GERAN: GSM /GPRS/ Edge Radio Access Network 12 12 UMTS Network Architecture Rel.99 13 UMTS Network Architecture Rel.99 14 UMTS Network Architecture Rel.99 GERAN - GSM /GPRS/ Edge Radio Access Network Gb Iu-CS Iub Uu NodeB Iur Iu-PS 15 15 Logical Roles of RNC 16 Logical Roles of RNC Soft Handover (Macro Diversity) 17 UMTS Network Architecture Rel.99 CN - Core Network 18 Interfaces 19 UTRAN Architecture Uu interface Iub interface RNC UE NodeB CN Iur interface NodeB RNC UE NodeB UTRAN UTRAN: UMTS Terrestrial Radio Access Network 20 UTRAN Architecture New Radio Access network Uu interface needed mainly due to new radio Iub interface access technology Core Network (CN) is based on GSM/GPRS RNC UE CN Radio Network Controller (RNC) Iur interface corresponds roughly to the Base Station Controller (BSC) in GSM NodeB Node B corresponds roughly to NodeB RNC UE NodeB the Base Station in GSM UTRAN UTRAN: UMTS Terrestrial Radio Access Network 21 UTRAN Architecture Node B Main function to convert the data flow between Uu and Iub interfaces Some Radio Resource Management (RRM) tasks: Measurements Innerloop power control 22 UTRAN Architecture 23 UTRAN Architecture RNC – Radio Node Controller Controls the radio resources in its domain Radio Resource Management (RRM) tasks include e.g the following Mapping of QoS Parameters into the air interface Air interface scheduling Handover control Outer loop power control Admission Control Initial power and SIR setting Radio resource reservation Code allocation Load Control 24 UE Class - Độ nhạy thu: công suất thu tối thiểu cho BER không vượt giá trị tiền định (BER ≤ 0.001): UE: User Equipement + UE: S = - 117 dBm + BTS : S = - 121 dBm UE = ME + USIM 25 25 Rake Receiver 26 27 28 Rake Receiver 29 ...Rel.99, Rel.4 IMT-2000 : ITU’s umbrella name for 3G which stands for International Mobile Telecommunications 2000 IMT-DS Direct Spread CDMA: W-CDMA / UMTS New from 3GPP; UTRAN FDD 3 WCDMA... and Evolution 3GPP Rel -9 9 12/99 2000 Japan 3GPP Rel 03/01 2001 2002 Europe (precommercial) 3GPP Rel 2H/04 3GPP Rel 03/02 2003 2004 Europe (commercial) 2005 HSDPA (commercial) 3GPP Rel 06/07... Microcell In-Building Picocell Basic Terminal PDA Terminal Audio/Visual Terminal UMTS Characteristics UMTS FDD (Frequency Division Duplex) Uplink: 1920 - 1980 MHz Downlink: 2110 - 2170