Opportunity
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.
Solution
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
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