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 normal broadband community design. On this weblog, we’ll concentrate on a brand new structure for broadband networks, and the challenges that they tackle.
Shifting to a distributed structure
The power to allow subscriber capabilities on completely different layers or units within the community supplies a chance 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 whole subscriber site visitors, versatile termination permits for the environment friendly offload of video site visitors nearer to the subscriber by means of cautious placement of content material caches and the addition of peering factors. Distributed termination of subscribers improves the general person expertise because the site visitors follows a extra very best path that optimizes capability utilization and helps decrease latency for demanding purposes.
With this distributed structure, communication service suppliers (CSPs) can save prices by lowering unneeded bandwidth upgrades of the complete community by means of site visitors offload additional downstream. Nevertheless, with extra distributed placement of subscriber edge capabilities utilizing completely different termination fashions, CSPs could face challenges with scaling, managing, and working subscriber companies networks.
To unravel these challenges, Broadband Discussion board outlined the Management and Consumer Airplane Separation (CUPS) mannequin for the Broadband Community Gateway (BNG) in TR-459 (see Determine 1). CUPS permits distribution of person/knowledge planes nearer to the subscriber, permitting the management aircraft operate to be centralized. This can be a important change from the normal BNG structure—the place management aircraft and person aircraft capabilities are tightly built-in and carried out by the identical gadget. This new distributed architectural method takes benefit of CUPS to supply newer broadband companies and use instances which can be completely different from conventional choices.
Centralizing the management aircraft operate helps decrease operational prices in a distributed subscriber edge operate that may be non-uniform with various necessities on scalability, type issue, and function.
CUPS additionally permits new income streams or fashions, which weren’t doable with the normal structure, reminiscent of differentiated service plans. For instance, service suppliers can provide a day/evening plan, the place subscribers are provisioned or moved to a smaller set of person planes through the evening for value financial savings and potential sustainability advantages.
Clients may provide tiered plans with Platinum, Gold, and Greatest-Effort, primarily based 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 permits increased flexibility for CSPs to seamlessly transfer subscribers to completely different nodes with out disruption.
The newest improvement by the Broadband Discussion board is Concern 2 of TR-459 Multi-Service Disaggregated BNG with CUPS specification (see Figure2), which permits improved resiliency, scalability, and sooner deployment instances to assist present a greater end-user expertise with a extra dependable and constant service.
Within the third weblog, we’ll share particulars on the Cisco Subscriber Edge answer, together with the structure, technical benefits, and buyer advantages.
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