무선통신/UMTS (2) 썸네일형 리스트형 Standards Topic Specifications Serial Number RF Performance 25.1xx Physical Layer 25.2xx Layer 2 and Layer 3 25.3xx UTRAN 25.4xx NAS Layer (CC,SS,SMS,MM) 22.xxx, 23.xxx, 24.xxx Packet Switched Data Service 22.060, 23.060 Circuit Switched Data Service 23.910 Voice Service 26.xxx USIM 31.xxx UE Conformance 34.xxx 21.101 - a complete list of Release 99 specifications21.905 - a list of acronyms ● Physical Lay.. Overview 1. Supports1.1 Multiple service - PS: 1.960 Mbps - CS: 384 kbps1.2 Multiple QoS - Qos : 채널이 셋업될 때 설정, 이후 connection 상태에서 재설정 가능1.3 Higher data rates 2. Provides2.1 Wireline voice quality - AMR(Adaptive multi-rate) vocoder - Improvement over the Enhanced Full Rate (EFR) vocoder for GSM2.2 Improved capacity - fast power control (1500 Hz vs. 2Hz for GSM) on both the Uplink and the Downlink2.3 spect.. 이전 1 다음