That is Half II of a three-blog collection on options to beat challenges related to bridging the digital divide.
Within the earlier weblog (see Bridging the Digital Divide with Subscriber Edge), we mentioned the standard broadband community design. On this weblog, we are going to deal with a brand new structure for broadband networks, and the challenges that they deal with.
Transferring to a distributed structure
The power to allow subscriber features on completely different layers or units within the community supplies a possibility to optimally place subscriber edge within the community to assist match economical and user-experience wants. For instance, provided that video quantities to greater than 75% of the amount of complete subscriber visitors, versatile termination permits for the environment friendly offload of video visitors nearer to the subscriber by cautious placement of content material caches and the addition of peering factors. Distributed termination of subscribers improves the general person expertise because the visitors follows a extra ultimate path that optimizes capability utilization and helps decrease latency for demanding purposes.
With this distributed structure, communication service suppliers (CSPs) can save prices by decreasing unneeded bandwidth upgrades of the whole community by visitors offload additional downstream. Nonetheless, with extra distributed placement of subscriber edge features utilizing completely different termination fashions, CSPs could face challenges with scaling, managing, and working subscriber providers networks.
To resolve these challenges, Broadband Discussion board outlined the Management and Person Airplane Separation (CUPS) mannequin for the Broadband Community Gateway (BNG) in TR-459 (see Determine 1). CUPS allows distribution of person/information planes nearer to the subscriber, permitting the management aircraft perform to be centralized. It is a vital change from the standard BNG structure—the place management aircraft and person aircraft features are tightly built-in and carried out by the identical system. This new distributed architectural strategy takes benefit of CUPS to supply newer broadband providers and use circumstances which can be completely different from conventional choices.
Centralizing the management aircraft perform helps decrease operational prices in a distributed subscriber edge perform that may be non-uniform with various necessities on scalability, type issue, and function.
CUPS additionally allows new income streams or fashions, which weren’t potential with the standard structure, reminiscent of differentiated service plans. For instance, service suppliers can supply a day/night time plan, the place subscribers are provisioned or moved to a smaller set of person planes through the night time for price financial savings and potential sustainability advantages.
Clients may also supply tiered plans with Platinum, Gold, and Finest-Effort, based mostly on redundancy capabilities to assist shield premium subscribers from person aircraft, entry, or web site failures. With the management aircraft not tightly built-in with the person aircraft, and full visibility of all person planes, CUPS allows greater flexibility for CSPs to seamlessly transfer subscribers to completely different nodes with out disruption.
The newest growth by the Broadband Discussion board is Difficulty 2 of TR-459 Multi-Service Disaggregated BNG with CUPS specification (see Figure2), which allows improved resiliency, scalability, and quicker deployment occasions to assist present a greater end-user expertise with a extra dependable and constant service.
Within the third weblog, we are going to share particulars on the Cisco Subscriber Edge answer, together with the structure, technical benefits, and buyer advantages.
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