Backhaul and Core Network Transport

Backhaul and Core Network Transport in 2G/2.5G/3G/4G Networks

The Unified Backhaul and Core Network in a hybrid environment of 2G, 2.5G, 3G and 4G systems are depicted in the chart below. The Backhaul Access/Pre-aggregation/Aggregation uses the options described earlier. For example the Legacy 2G and 2.5G systems uses PDH Microwave, SDH and IP-MPLS in the Access/Pre-Aggregation/Aggregation part of the Backhaul. The NodeB in 3G UMTS uses either Packet based Microwave, EoSDH and IP-MPLS option or GPON-Metro Ethernet and IP-MPLS option in the Access/Pre-Aggregation/Aggregation part of the Backhaul.

Unified Backhaul and Core Network in 2G/2.5G/3G/4G Networks

The Nation-wide IP-MPLS network plays an important role in linking all the component networks of Wireless Network comprising of 2G/2.5G/3G /4G systems. The User Data Traffic, Voice traffic, Signalling and OAM Traffic , 4G Network User Data/Signalling/OAM Traffic, IMS Traffic are transported thru’ Nation-wide IP MPLS Network. The traditional TDM traffic of 2G/2.5G are carried using SAToP (Structure-Agnostic TDM over Packet) or CESoPSN (Circuit Emulation Service over Packet Switched Network) over Nation-wide IP MPLS Network if BSCs are not co-located near BTSs in the same city.