- RAN: Radio Access Network
- UE:User Equipment //mobile phone
- Node B:Radio base station
- gNB:(Next Generation NodeB) //5g Base Station
- eNB: //Base Station
- NR: New Radio //5G radio interface between UE&gNB
- 5GCN:5G core network
- EPC:Evolved Packet Core //4G LTE core network
- UPF - User Plane Function
- GTP(GPRS Tunnelling Protocol) //https://github.com/free5gc/gtp5g
- AMF:Access and Mobility Management
- 3GPP:the Third-Generation Partnership Project //telecom stardard orgnazation
- PLMN Identity(Mobile Country Code (MCC), Mobile Network Code (MNC) and a cell ID)
- mobile identity (IMSI)
| Generation | Radio Technology | Base Station Name |
|---|
| 2G | GSM | BTS (Base Transceiver Station) |
| 3G | UMTS | NodeB |
| 4G | LTE | eNB, Evolved NodeB |
| 5G | NR:New Radio | gNB, Next Generation NodeB |
aritech view
Spectrum usage & feature
- ref http://anisimoff.org/eng/5g/5g_overview.html
- Low-frequency bands <3GHz 带宽低于20MHz, 长距离覆盖,稳定,低带宽
- Medium-frequency bands （3-6Ghz）cmW 厘米波 用多天线传输提高覆盖面 高带宽200MHz 5G的主要使用频段
- high-frequency bands,(6-24Ghz) mmW 毫米波，也是wifi使用的波段，5G也开始使用
- Massive MIMO and Beamforming()
- Diversity(frequency diversity) 单天线对,多频同传,不是所有频段都受到干扰,提高传输成功率 //Frequency diversity employs a single transmit/receive antenna pair, but operating at two or more widely spaced carrier frequencies.
- Spatial Multiplexing 空间复用, 多数据流复用同一通道
- Directivity (beamforming) 方向性波束,多天线服务不同方向互补干扰,提高覆盖率和抗干扰能力
google search
Secret & Auth
opensource
