[信息与通信]WCDMA无线接口4 WCDMA Physical Layer.ppt

WCDMA Air Interface TrainingPart 4 WCDMA Physical Layer WCDMA(ETSI/ARIB/3GPP) WCDMA Overview 3GPP Standards Organization, 3GPP Document Structure WCDMA Frequency Allocations WCDMA Performance Overview Physical Implementation WCDMA Network Overview Downlink Implementation Uplink Implementation Physical Layer Procedures Slot, Frame, and Superframe Synchronization Random Access Procedures Packet Channel Access Establishment of a Dedicated Channel Soft Handover Hard Handover / Compressed Mode Operation TDD Implementation WCDMA(ETSI/ARIB/3GPP) Third Generation Partnership Project (3GPP) WCDMA(ETSI/ARIB/3GPP) Specifications referenced in this presentation WCDMA(ETSI/ARIB/3GPP) 3GPP WCDMA Overview Both FDD (2x 5 MHz) and TDD (1x 5 MHz)modes supported Operation specified in bands between 1850 and 2170 MHz BS time synchronization not required for FDD mode GPS not required Fast Synchronization Codes allow asynchronous operation and handover Synchronous operation is allowed; allows faster acquisition, interference reduction Multi-Code and Variable Spreading Factor modes supported Network interface compatible with GSM - MAP / GPRS * To be made compatible with ANSI-41 per OHG requirement Physical Parameters: Chip rate = 3.840 Mcps RF Bandwidth = 5 MHz Physical Layer data rates of 15, 30, 60, 120, 240, 480, 960, and 1920 kb/sec Payload data rates of 12.2, 64, 144, 384, 768, and 2048 kb/sec Frame length = 10 mSec Fast Power Control: Bi-directional; 1500 updates/sec WCDMA Frequency Allocations UMTS and the UTRAN UMTS and the UTRAN UTRAN Definitions RNS (Radio Network Subsystem) A full or partial network offering access between UE and Core Network Contains one RNC RNC (Radio Network Controller) Element of the RNS that controls physical radio resources Node B Logical Node controlling transmission and reception from one or more cells Uu Interface Interface between UE and Node B Iu Interface Interface between CN and RNS Iur Interface Interface between one RNS and another RN