Active Ethernet vs (G)PON Solution, which one do you prefer?

Discussions about AE (Active Ethernet) and (G)PON

“As I studied over internet that the mainstream point is GPON better , but the Active Ethernet is still a popular option in Fiber optical network , especially for FTTC and FTTB in Eu. But which one will you prefer more?”

GPON is better

GPON, physical infrastructure is cheaper and the only sharing model with other operators.
FTTH P2P(point to point) Fiber Solution

FTTH P2P(point to point) Fiber Solution

Which types of specific deployment scenario?

That question needs to be asked in context of a specific deployment scenario. It is an engineering and economic trade-off. For most residential and SMB scenarios, GPON has overwhelming advantages in CAPEX, energy consumption, rack space, MTTR and MBTF. AE may prove in for large MDU and MTU scenarios, in some high density urban scenarios where energy and floor space cost is low, and in a some very low density rural situations (such as tails to point-to-point wireless systems).

Most major fixed access vendors offer hardened, high port density carrier-class access switches in outdoor enclosures, and bidirectional Ethernet SFPs. There are also ONTs that auto-detect whether they are connected to a GPON or a pt-pt Ethernet.

Help to reconcile with traditional systems

Really versatility and the advantage of providing greater than 10 Mbps capacity, help to reconcile with traditional systems, the operating costs are lower and definition this is the technology that will help us have a real speed and can make mixed networks with wireless or copper.

Depend on the location being serviced and users

Choice of design will depend on the location being serviced and what end user products you want to provide.

In MDU we are increasingly deploying a mixed approach with a few spare fibres to allow users to switch to AE rather than the default GPON. This does increase costs upfront whilst also allowing a deeper range of products.

Smaller the aggregation of premises, the better for service loss restriction

From my limited knowledge, no PON is not capable of any redundancy, such as Fiber Rings, to provide protection from cuts (Fiber-Seeking Backhoe). Obviously it would be too expensive to provide dual-backhaul for every endpoint, though I have seen an interesting patent on this topic.

With AE, the smaller the aggregation of premises the better for service loss restriction, as downstream from the switch you have point-to-point links that are not redundant. To me that means more Fiber Huts (which could be underground for aesthetics), linked in Rings, for improved customer satisfaction.

Both are respectable

Both are different networking segments. Each one has a respectable place in today’s market.

Physical redundancy is challenging

Traditionally each seems to fit a specific use case, if used as customer access then AE is mostly adopted for leased line services. This requires building a resilient logical
network to meet SLA demands. Physical redundancy is challenging and in normal circumstances would start from the exchange. To have customer circuit redundancy would be costly but not impossible. It could not take advantage of 2:n splitting and type b/c redundancy already built into GPON and would rely on L2/L3 protocols to address this. GPON could be adapted to provide a leased line like service providing GPON and L2 transport engineering are aligned. The downside is that lot more OAM is required to ensure SLAs and some customers maybe conscious of the shared medium in terms of privacy.

Project case from India

I am currently working on gpon solutions in India….it has lot of advantages over Ethernet like cheaper physical infrastructure reliable access and feasibility is too.

Considering the cost of redundant

GPON supports different types of redundancy, as the great comment from above states. Basically anything can be redundant, the problem is obviously the cost of this.

In general, this is a matter of costs vs requirements. I believe there is a trend to deploy more PON than AE (Active Ethernet), even for transparent Ethernet services with
guaranteed SLA. Of course some customers do not like that private traffic is using a shared physical medium, which leads to AE.

FTTH P2MP_PON fiber solution

FTTH P2MP_PON fiber solution

Depends on the environment: multiple APs or Base Stations

In an environment where there is much difference between peak and average datarates in multiple APs or Base Stations or even the Aggregation points at the buildings, PONs, and especially GPONs are handy in statistically managing the backhual bandwidth requirement while supporting very good SLA framework. AE (Active Ethernet) can be useful in isolate environments where the peak-to-average datarates among multiple BSs (Base Stations) cannot be multiplexed within a short range. (G)PON also has the advantage of easy addition of a new aggregation point to the existing infrastructure and merging it from the ONU all the way till OLT rather than provisioning L2 services hop-by-hop for AE.

AE (Active Ethernet) Mobile backhauling

AE is preferred for high bandwidth links. AE is also being used for Mobile backhauling.

Makes it flexible to network changes

I am not sure about this one…. with regard’s to previous comments this makes perfect sense. LTE BS backhaul traffic would benefit from AE technology especially if you consider support for 1588v2 where phase variations might be an issue and could result from TDMA conditions especially if IP QoS is not planned properly. On the other hand, as the point was made recently. Adaptation of the outside plant by adding or reducing splitting ratios makes it flexible to network changes. Vendors like Huawei and Alcatel support both AE and GPON support FTTx sub-tended uplinks on their MSAN products and can also support G-fast (downlinks) with a migration to pure PON if needed in the future.

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