Dear Friends
I’d like to share with you my article includes below headers
1- What do RAN , Physical layer and Logical Layer mean ?
2- What are eGBTS , GBTS , NodeB,eNodeB and gNodeB ?
3- Network Architecture of Base Station at RAN Layers.
4- Base Station Mapping between RAN Layers.
5- Reference of my article
What do RAN , Physical layer and Logical Layer mean ?
RAN : Radio Access Network and consists of two layes ( Logical and Physical )
Physical Layer : Consistes of Base Transceiver Station device “ BTS “ and Base Station Controller “ BSC “ and they are communicating togther through Transport Network
BTS Node <> Transport Network <> BSC Node
Logical Layer : Consistes of Base Transceiver Station “ BTS “ implemented device include eGBTS , GBTS , NodeB,eNodeB and gNodeB and Base Station Controller “ BSC “ and they are communicating togther through interface Protocol
GBTS , eGBTS , NodeB, eNodeB and gNodeB <> interface Protocol <> BSC Node / RNC Node
The RAN logical layer is classified into the 5G RAN, GBSS, UTRAN and E-UTRAN according to protocols used by each network.
Logical functions of base station controllers include GBSC
GBSS : GSM base station system,
UTRAN : Universal terrestrial radio access network,
E-UTRAN : Evolved universal terrestrial radio access network.
What are eGBTS , GBTS , NodeB,eNodeB and gNodeB ?
GBTS : Means That BTS works with 2G band
eGBTS : Means That BTS 4G works with 2G Band
NodeB : Means That BTS works with 3G band
eNodeB : Means That BTS works with 4G band
gNodeB: Means That BTS works with 5G band
BTS : The Cabinet sometimes includes more than BBU Module at the same time , Perhaps for 2G Only or 3G or 4G or 5G or Both
G : GSM Band and e : LTE Band and g: 5G band
GSM : Global system for mobile communications
LTE : Long Term Evolution
Network Architecture of Base Station at RAN Layers.
MS : Mobile Station / UE : User equipment
BTS Node : A physical Base Transceiver Station and includes radio equipment and antenna system to provide GBTS Service
BSC Node : A physical Base Station Controller which provides GBSC Service
Transport Network : A Communication Channel among BTS , BSC and S-GW / MME / EPC / 5GC
S-GW : Service Gateway
MME : Mobility Management entity
EPC : Evolved Packet Core
5GC : 5G Core Network
GBSS : GSM Base Station System and consists of GBTS and GBSC
GBSC : provides functions of Radio resource management , BTS Management ,Mobility management and access Control
Um: Unacknowledged mode is the interface between GBTS and Mobile station / User equipment
Abis : The interface between the GBTS and GBSC
Iur-g : the interface between two GBSCs and g means 2G
Iur : the interface between two RNCs
UTRAN : Universal terrestrial radio access network and includes NodeB “ 3G “ and RNC
RNC : Radio network Contoller and gives function include radio Channel Management ,Physical layer protocol processing and Signaling Procedure Processing .
Iub: The interface between NodeB and RNC
Uu: The interface between NodeB and User equipment / Mobile Station
E-UTRAN : Evolved universal terrestrial radio access network and includes the eNodeBs and performs functions radio resource management, radio channel management, mobility management, physical layer protocol processing, signaling procedure processing, and access control.
X2 : The Signaling interface between two eNodeBs
S1: The interface between eNodeB and EPC
EPC: Evolved Packet Core
S1-U : An interface between the eNodeB and the S-GW for transfer of user data packets
X2 : interface between the eNodeB and the gNodeB and includes Control plane (X2-C) and User plane (X2-U) interfaces
X2-C and X2-U transfer data between eNodeB and gNodeB respectively
The X2-C is based on the Stream Control Transmission Protocol (SCTP)
The X2-U is based on the GPRS Tunneling Protocol-User Plane (GTP-U)
Base Station Mapping between RAN Layers.
The logical functions of a base station are deployed on physical devices.
Where one physical device can be deployed with one or several logical functions
Article Ref : 3900 & 5900 Series base station Product Documentation
At the end , I hope that my article is useful and help each other
Warm Regards
Walid Nawar PDAC - MVE
