Recent studies show that 40%-50% of the Operational Expenses (OpEx) incurred by mobile wireless operators are associated with the costs of 2G BTS T1/E1 leased lines for the backhaul of traffic in the Radio Access Network (RAN). The cost-effectiveness of Ethernet transport enables new opportunities for mobile wireless operators to reduce the recurring costs of TDM T1/E1 leased lines by enabling the backhaul of BTS T1/E1 circuits over low-cost Ethernet or IP transport networks while positioning the RAN for 3G All-IP.
Axerra’s AXN1, AXN10, and AXN100 Pseudo-Wire Gateways and Access Devices™, deployed at the BTS cell sites, aggregate and backhaul T1/E1 circuits to the BSC site using TDM pseudo-wire encapsulation known as Circuit Emulation Pseudo-Wire (CE-PW). Axerra’s AXN1600 or AXN800 carrier-class Pseudo-Wire gateways deployed at the BSC site, aggregate, terminate, and groom multiple CE-PWs into high-speed TDM links for cost-effective integration with the BSC.
The Ethernet transport can be available by Carrier Ethernet, cable HFC, or cost-effective Ethernet radio. High-accuracy clock synchronization, required for proper operation of the BTS, is transferred across the Ethernet network utilizing Axerra’s RTP-based High-Precision Clock Recovery (HPCR™) mechanism. HPCR is compliant with G.823/G.824 and maintains ±16 ppb FFoFF accuracy for both Maximum Relative Time Interval Error (MRTIE) traffic interface as well as Maximum Time Interval Error (MTIE) synchronization interface.
Benefits for Service Providers
Reduces OpEx associated with TDM leased lines while protecting 2G investments and positioning the RAN for 3G All-IP
Enables more bandwidth at lower cost to support new high-speed data services while also decreasing dependency on costly T1/E1s from incumbent carriers
Ensures cellular network performance through Axerra’s HPCR, the industry most robust and accurate clock recovery over packet mechanism and low end-to-end delay