Alternative solutions
require deployment of a logical hub-and-spoke architecture on the physical fiber
ring, which preclude efficient transport of multicast traffic. Hub-and-spoke designs
require more fiber, more virtual connections and multiple copies of multicast streams
to be broadcast simultaneously. All recipients can get a multicast stream from an RPR
ring with only one copy of the packet on the ring.
Efficient Bandwidth Management RPR is designed to deliver packets over a shared
ring using statistical multiplexing, spatial reuse, and efficient allocation of protection
bandwidth to deliver more services and therefore more revenue per equivalent amount
of bandwidth.
?– Statistical multiplexing The RPR-based shared media enables multiple nodes
to share the same network resources and thus take advantage of effective statistical
multiplexing. Bursty services share the same resource, and the allocation of
bandwidth to support excess traffic becomes significantly more efficient.
?– Spatial reuse The RPR shared media natively provides the ability to spatially reuse
unused spans on the shared ring. Spatial reuse allows reuse of bandwidth not only on
different spans than the ones carrying a service, but also on asymmetrical services.
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