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Mobile Backhaul
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TECHNOLOGY OVERVIEW |
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Wireless backhaul is the part of the network that carries voice and data traffic in the RAN from the mobile base station to the mobile operators’ core network. |
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Traditionally, T1/E1 transport has been used for wireless backhaul, but as the services have scaled, the cost of backhauling traffic from cell towers to controllers and switching centers has grown to become a large percentage of wireless operations expenses. Wireless operators must prepare for the eventual convergence of the voice and data infrastructures to deliver new multimedia services. |
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PRODUCT SOLUTIONS |
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APPLICATIONS |
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Ethernet |
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Ethernet as a transport technology is appealing because it supports both higher data rates as well as a more attractive cost-per-bit of transported traffic. It is also backwards compatible with 2G and 3G services requiring T1/E1 handoffs through technology such as pseudo-wire emulation. |
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Microwave and Free Space Optics |
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This involves point-to-point microwave links for connecting to the central controller. The use of microwave links capable of carrying Ethernet traffic is increasing in popularity and many carriers plan backhaul network expansion based on this approach. Free Space Optics (FSO) is based on laser optics and provides a means for transport without the need to reserve a radio spectrum. The technology is particularly useful in areas where line-of-sight connectivity is available but laying out fiber is not economical or feasible. |
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Multi-Service Systems Using Pseudowires |
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Some carriers are evaluating multi-service systems that can aggregate legacy T1/E1s and ATM, as well as Ethernet using pseudowires. These pseudowires can connect through leased lines or metro Ethernet network to the central controller. Many solutions exist that can aggregate Inverse Multiplexing over ATM (IMA) and 2G TDM, and carry over pseudowires. Pseudowires technology has been used and is proven in wireline networks and offers a viable migration path to a pure IP-based solution. |
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Mobile Backhaul Testing |
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| As the network backhaul infrastructure evolves to support new technologies that require more and more bandwidth, service providers need to gain real-time, end-to-end insight into network performance in order to manage existing architectures and ensure service quality regardless of the underlying technology, all the while meeting their bottom-line objectives. Wireless backhaul testing and monitoring solutions provide network operators with the tools they need to enhance network performance and reliability, ensure customer satisfaction and reduce churn. Modular test platforms and end-to-end monitoring systems help reduce equipment inventory and minimize CAPEX, as well as provide simplified, centralized testing to reduce truck rolls, man/hour ratios and operational expenses (OPEX). | |||||||||||||||||||||||||
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NETWORK DIAGRAMS |
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