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WebHigh Speed Packet Access (HSPA) is an amalgamation of two mobile protocols—High Speed Downlink Packet Access (HSDPA) and High Speed Uplink Packet Access (HSUPA)—that extends and improves the performance of existing 3G mobile telecommunication networks using the WCDMA protocols. A further-improved 3GPP … clean sky 2 logo download Web3GPP协议中文版-002. [11]3G TS 25.104:”BTS Radio transmission and reception（FDD)". 无线接口一般指用户设备 (UE）和网络之间的Uu接口。. 无线接口由层1，2和3组成。. 层1基于WCDMA技术,TS25.200系列描述了层1的规范。. 无线接口的层2和层3的描述分别在TS25。. 300和25.400系列中。. 图1 ... clean sky 2 lpa