9 词条
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2G wireless network
Second-generation (2G) digital cellular networks used by mobile phones. 2G networks was developed as a replacement for first generation (1G) analog cellular networks, and the GSM standard originally described a digital, circuit-switched network optimized for full duplex voice telephony. This expanded over time to include data communications, first by circuit-switched transport, then by packet data transport via GPRS (General Packet Radio Services) and EDGE (Enhanced Data rates for GSM Evolution or EGPRS).
2G wireless network的贡献者
2G wireless network
来访位置注册处
移动通信; 2G wireless network
动态地存储着位于其管辖区内的来访用户信息，例如位置区，或者说，它是一个在相关MSC区域内漫游的移动台的位置和管理信息的数据库．VLR经常与有关的HLR 交换大量数据，以便MSC建立呼入或呼出。 ...
高级移动电话系统
移动通信; 2G wireless network
北美首先采用的一种800MHz频段摸拟蜂窝公众移动电话系统。采用模拟话音，数字信令-与大区制相反，基地台功率较小，一般在100W以下，覆盖区半径为2—20km。 ...
