1.全球移动通信系统(GSM):
它是世界范围内移动电话用户广泛使用的移动网络。在这种情况下,客户的信息被放在可以在新手机中携带的sim卡上。它在900 MHz或1,800 MHz频段上运行。在GSM中,使用了两种技术:FDMA和TDMA。
2.长期演进(LTE):
它是高速数据通信的标准。它提供约100 Mbps的下载速度和约50 Mbps的上载速度。使用数据服务时,它不能提供良好的语音通话质量。它需要一张SIM卡才能验证手机。
GSM和LTE之间的区别:
S.NO | GSM | LTE |
---|---|---|
1. | GSM supports both voice calls and data. | Whereas it is used only for high speed data communication. |
2. | GSM uses Frequency Division Multiple Access(FDMA) and Time-division multiple access(TDMA). | Whereas it uses Orthogonal frequency division multiple access(OFDMA) and Single-carrier frequency division multiple access(SC-FDMA) |
3. | In CSM, information is transported through channels that are separated into physical and logical channels. | Whereas in LTE, information is carried using physical, logical and transport channels. |
4. | In GSM, two frequency bands are used 900 MHz and 1800 MHz. | Whereas in LTE, frequency bands from 1 to 25 and from 33 to 41 are reserved for FDD( Frequency Division Duplex) and TDD(Time Division Duplex) respectively. |
5. | In this, the information of customer is stored in sim card. | Whereas in this, a sim card is required to verify the mobile phone. |
6. | It is comparatively slow network. | Whereas it is the fastest network. |