As next-generation PON begins to take hold, we’re seeing some common deployment scenarios emerge from GPON to XGS-PON. The first is opportunistic, applying NG-PON in low volumes and low density, usually providing very high bitrates to scattered business or high-end customers. The second scenario is hot-zone deployments: a lot of NG-PON connections in a specific area, such as you might expect with an affluent residential area or business parcs. The third approach are massive deployments where a service provider is ready to go large with NG-PON.
Each scenario has the same challenges: cost, time to market and service continuity. The current migration method is a modular approach using external co-existence elements. This is best for low volume migrations as operators can move quickly with low upfront investment. However, it can become cumbersome as the additional equipment quickly piles up, requiring more re-cabling work, more visits to the central office, and higher OPEX to store, operate and maintain the equipment. For massive deployments, the modular approach becomes a big challenge.
Nokia has a full set of solutions to fit any migration scenario and make both incremental and widescale NG-PON deployments efficient. Our new Multi-PON line card supports three modes of operation on each port: GPON mode, XGS-PON mode, or multi-PON mode supporting GPON and XGS-PON simultaneously with embedded co-existence functionality, so there is no need for external co-existence equipment. Our analyses show that for massive migrations to NG-PON, this approach is 20% cheaper and can cut the migration work by a factor of 10.
How can you apply it to your migration strategy?
Multi-PON can make your network instantly ready for XGS-PON by replacing GPON cards with Multi-PON cards equipped with Multi-PON optics. Existing GPON users maintain their GPON services and when it’s time to upgrade, it’s done remotely via OSS, without needing additional manual work, re-cabling, new cards or other equipment. The upgrade only affects users that need to be migrated; the rest can remain on GPON, even if they share the same PON. This is very efficient for those operators who plan migration very soon.
For mid- to long-term migrations, Multi-PON provides a pay-as-you-grow path. First, GPON cards can be swapped with Multi-PON cards and legacy GPON optics reused to keep costs under control. Operators can continue with GPON services and, when an upgrade is needed, the GPON optics are replaced by Multi-PON optics and users switched to XGS-PON.
For greenfield deployments, where operators jump straight into XGS-PON, Multi-PON delivers a high-density, high-capacity solution. Operators may consider XGS-PON optics, which are more cost efficient because co-existence is not needed. Or they can use Multi-PON optics to gain maximum flexibility to offer the right service at the right cost.
Multi-PON means service providers can move quickly to market with new services, keep costs under control and keep service disruption to a minimum. Nokia Multi-PON is built on our new chipset called Quillion that we have developed in-house to give us the high density (16 ports), high performance (200 Gb/s non-blocking backplane) and lower power consumption (up to 50%). We’ve taken steps to make our solution even more efficient by implementing intent-based workflows that automate the migration process in the access node and management system, which can be triggered by an event like swapping the ONT at a customer’s home.
We’ve long believed in the need for different options for different scenarios and using technology to let operators migrate at their own pace. Indeed, this philosophy is at the heart of our Gigabit your way approach. Multi-PON is our solution to give service providers even greater control over their broadband strategies by actually making it simple.
Come see us at booth #114 at this year’s DistribuTECH conference and expo coming up this May.
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*Credits: Original article written by Ana Pesovic of Nokia.
