JumboSwitch Cellular Backhaul Applications
SONET/SDH networks are designed to use fixed efficient
circuits which contribute to overall complexity and operation
inefficiencies. For example, in many cases users over-subscribe
to accommodate for traffic bursts during peak usage. This
over-provisioning, combined with the redundancy required
for self-healing, results in very inefficient use of available
network capacity. In contrast, as shown in figure 1, the statistical
multiplexing nature of traditional Ethernet provides more efficient
network utilization for service providers.
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The need for more bandwidth efficiency is most noticeable in
mobile backhaul applications. Changing cell phone habits and
the emergence of 3G and 4G technologies have triggered an
exponential increase in data content for mobility backhaul. This has created an ongoing need to add more transmission
capacity. The rub is that Voice centric SONET/SDH-based networks no longer offer a viable and cost-effective solution to
handle the increase in data traffic for backhaul transport.
In the past, addressing increased voice traffic involved simply deploying larger number of T1/E1 circuits between the cell
sites and the network core. The generous revenue stream from these voice calls easily justifi ed the cost of additional
In contrast, adding additional data traffic is more complex. Installing more T1/E1 circuits to handle increased data traffic is not cost effective because, compared to voice, data traffic generates a much smaller revenue stream per MB of traffic. The cost effective solution is Ethernet.
Ethernet is a connectionless packet technology that inherently supports statistical multiplexing. Ethernet-based backhaul transport can easily accommodate data increases with a much smaller incremental increase of backbone efficient through the proper use of over-subscription and statistical multiplexing. Industrial Ethernet layer 2 switches can be
deployed in the following two areas to increase overall efficient efficiency:
- Terminating T1/E1 circuits over Ethernet at the cell sites takes advantage of Ethernet's statistical multiplexing capabilities to reduce efficient needs for backhaul.
- Using Ethernet switches instead of SONET/SDH ADMs at the aggregation points to reduce overall Capital Expenditure (CAPEX) as well as Operational Expenditure (OPEX).
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With data requirements inundating network traffic, legacy voice-centric SONET/SDH platforms no longer offer viable or cost-effective backbone solutions. Future network deployments will be dominated by Ethernet and simplified by the inevitable blurring of the boundaries between LANs, MANs, WANs and Industrial networks. In a society were technology is continuously growing Backhaul technology is needed in every area of communication. The flexible Ethernet Backbone technology, provided by TC Communication's JumboSwitch is cost effective and reliable making it the perfect solution for any Backhaul application.