XGPON Plugtests

The objective of this event was to improve the user experience of optical networks (based on ITU G.984 series) through verifing interoperable behaviour related to error recovery cases and other fault situations to ensure stability and  robustness. To enrich the content of the event new tests were done for multicast and triple play streaming architectures and QoS.

ETSI Plugtests ™ hosted this GPON Interoperability Test Event, from 11th  to 15th  October 2010 in Sophia Antipolis. The organization of the event results from a co-operation between ETSI and France Telecom and supported by ETSI TC ATTM. The test plan was developed within the framework of the FSAN (Full Service Access Networks) Interoperability Task Group activities.

This event was the latest in a series of GPON interoperability events under the Broadband Access technologies in technical area i) of  SA/ETSI/ENTR/000/2009-06 (NCT infrastructures using wired or wireless technologies). The event supported the convergence of access technologies to provide ubiquitous broadband content with high throughput.

Interoperable GPON (Gigabit Passive Optical Networks) address one of the  challenges raised by the creation of the Single European Information Space. To quote from i2010: "…speed faster broadband in Europe services to deliver rich content such as high definition video;"
In particular this event added novelty by concentrating on improving the user experience through verifying the interoperable behaviour of OLTs and ONUs in error recovery cases and other fault situations. Aspects of stability and  robustness were also addressed. This event also included new testing scenarios involving multicast and triple play streaming architectures. Elements of QoS (Quality of Service) were also examined in the triple play streaming case.

The testing sessions gave vendors the opportunity to verify the maturity of their products and  achieve further progress on GPON interoperability. This included:

  1. The initiation of erroneous message flows to make it  possible to verify that the OLTs and ONTs behave as  described in the ITU G.984 series.
    • NOTE: OLT = Optical Line Terminal, ONT/ONU = Optical Network Terminal/Unit
  • The creation of error conditions so that the participants were required to monitor the error recovery procedures and alarms.
  • QoS testing scenarios which were covered in some Triple Play architectures.

There was a total of 13 participating companies with the following equipment:

  • 5 OLT and 12 ONT vendors
  • 8 ONT-only vendors, 1 OLT-only vendor
  • 1 observer with a GPON analyzer
  • Supporting Companies:
  • ETSI
  • France Telecom

There were more ONTs than OLTs meaning that some ONTs were idle during a given Test Session

  • 6 ONT only vendors had 5 Test Sessions during the event
  • 2 ONT only vendors had 4 Test Sessions during the event
  • 1 OLT/ONT vendor had 9 Test Sessions during the event
  • 3 OLT/ONT vendor had 11 Test Sessions during the event
  • 1 OLT only vendor had 12 Test Sessions during the event
  • 56 total test pairings, each 3 hours in duration
  • Each pairing consisting of 16 mandatory tests cases (with 4 conditional tests)

Each pairing consisted of 16 optional tests cases (with 2 conditional tests)

Due to NDA constraints, It is not possible to provide detailed results, however of the 557 test cases performed, 516 have been OK, which represents a success rate of 92.6%.