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Network Infrastructure Magazine | Friday, August 28, 2020
The growth in the mobile towers, enterprise connectivity services, and the rise of data centers are fueling the growth of transport networks.
FREMONT, CA: SDN is a powerful technology, and if implemented correctly, it can provide various optional advantages to the service providers. SDN not only provides operational efficiencies but also helps the service providers to develop newer revenue streams.
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Here are few regulatory-dependent SDN use cases to try to understand the impact of regulation on operations.
[vendor_logo_first]Automated frequency allocation –The idea is to trigger frequency change to minimize interference and maximize throughput. The SDN controller can either halve the bandwidth of links, each using a different half of the spectrum, or allocate a temporary channel and return it to the pool once the fade is gone. Self-coordination of radio channel allocations can also efficiently address on-demand network resource allocation by, lighting up dark carriers in events to allocate additional network resources to event areas or rerouting lower priority traffic to alternative routes
Network configuration – The network orchestrator can also manage auto-reconfiguration and auto-service restoration when a link upgrade is needed. This makes it easier to upgrade the network topology with minimum traffic downshift. For example, when a link requires less capacity, it can be dynamically reconfigured from a non-protected configuration to a hot standby configuration. In another example, if there is rain fade and less capacity is required, a MIMO configuration would be adjusted to provide system gain rather than doubling capacity.
Dynamic spectrum utilization - The majority of the spectrum is underused, and spectrum utilization databases combined with SDN technology can be seen as a rising solution for dynamic spectrum sharing. The database may include information about device locations and their activities, spectrum use, coverage or interference levels, relevant regulations and policies, services and networks, etc. Databases will enable controlled spectrum sharing to avoid unnecessary frequent channel switching and will minimize interference. The dynamic spectrum sharing mechanism requires a continuous exchange of information, and the data provided to the system controller has to be up-to-date and highly accurate. For 5G specifically, the SDN concept opens fundamentally new network configuration opportunities. Therefore, it is becoming an increasingly critical enabler for handling spectrum efficiently on a self-service basis.
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