13 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
随路信令
移动通信; 2G wireless network
就是在话音信道中兼传信令，它发送高于或低于音频频率的控制信号。目前用的较多的是亚音频(0-300Hz)信令，信令传输速率一般不高（不大于300bit/s）。 ...
故障弱化
移动通信; 2G wireless network
当中央控制器发生故障失效后，系统即转入单信道转发方式继续保持通信，此时用户台分别被分配在预先指定信道t．虽然系统失去集群功能，但这种使用户仍能进行通话的临时措施增强了系统使用的可靠性。 ...
