文件名称：G的目标-华为CDMA2000
文件大小：3.95MB
文件格式：PPT
更新时间：2024-05-13 05:51:57
cdma
3G的目标 全球统一频段、统一标准，全球无缝覆盖 高效的频谱效率 更高的服务质量、保密性和可靠性 易于从2G系统平滑演进与过渡，并反向兼容2G系统 能提供多种业务，数据业务速率最高可达2Mbps 车速环境：144kbps 步行环境：384kbps 室内环境：2Mbps 概述 (1) Capable of roaming globally: users can roam within the whole system,even in the whole world , and can be provided with guaranteed quality of service at different rates and in different statuses of motion. (2) Providing diversified services: providing voice, data with variable rates, active video non-voice services, especially multimedia services. (3) Capable of adapting to many kinds of environment: can integrate the existing Public Switched Telephone Network (PSTN), Integrated Service Digital Network (ISDN), cordless system, land mobile communication system and satellite communication system to provide seamless coverage. (4) Sufficient system capacity, powerful management capability of multiple users, high security performance and quality of service.