Title: Agenda Item 2.2: Post-Implementation Analysis of Data Link Performance Following Release 15 (R15) Ground Earth Station Software Upgrade
1Agenda Item 2.2Post-Implementation Analysis of
Data Link Performance FollowingRelease 15 (R15)
Ground Earth Station Software Upgrade
- SOCM/2 IP/nn
- Attachment A
- Bangkok, Thailand
- 8-10 February 2012
2Contents
- Summary of Release 15 GES Upgrade
- Data Link Performance Analysis of CPDLC and ADS-C
Technical Performance by GES - Before 2 months prior to month in which upgrade
occurred - After 2 months after month in which upgrade
occurred - Most recent November/December 2011
3Summary of Release 15 GES Upgrade
- Release 15 (R15) Most recent system software
upgrade for ground earth stations interfacing
with Inmarsat Classic Aero I-3 satellites - Purpose of upgrade
- To improve GES data link delivery capability and
aircraft log-on management subsystems - To enhance GES traffic handling and monitoring
subsystems
GES Identifier and Location Associated DSP Date of R15 Upgrade
XXE Eik, Norway ARINC 31 January 2010
XXC Santa Paula, California, USA ARINC 16 February 2010
AOW2 Aussaguel, France SITA 31 May 2010
POR1 Perth, Australia SITA 6 July 2010
4Data Link Performance Comparison forEik GES (XXE)
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9Summary of Observed Performance Following R15
Upgrade
- Eik GES
- Improvement in the ACTP was not observed
immediately following the R15 upgrade, but the
most recent data does show a noticeable
improvement in performance for CPDLC transactions - ADS-C downlink latency performance is observed to
have degraded in the period immediately following
the upgrade as well as in the most recent period
10Data Link Performance Comparison forSanta Paula
GES (XXC)
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15Summary of Observed Performance Following R15
Upgrade
- Santa Paula GES
- Improvement can be observed for both the ACTP for
CPDLC transactions and ADS-C downlink latency
performance for ADS-C downlink messages - Improvement shown to be stable between the period
immediately following the upgrade and the most
recent period of observation for both performance
measures
16Data Link Performance Comparison forAussaguel
GES (AOW2)
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21Summary of Observed Performance Following R15
Upgrade
- Aussaguel GES
- Improvement can be observed for both the ACTP for
CPDLC transactions and ADS-C downlink latency
performance for ADS-C downlink messages - Continued improvement shown between the period
immediately following the upgrade and the most
recent period of observation for both performance
measures
22Data Link Performance Comparison forPerth GES
(POR1)
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27Summary of Observed Performance Following R15
Upgrade
- Perth GES
- Slight improvement can be observed for both the
ACTP for CPDLC transactions and ADS-C downlink
latency performance for ADS-C downlink messages - Continued improvement shown between the period
immediately following the upgrade and the most
recent period of observation for ACTP - Improvement shown to be stable between the period
immediately following the upgrade and the most
recent period of observation for the ADS-C
downlink latency performance
28Conclusions
- Overall improvement in data link performance at
GES level following R15 upgrade - Improvement most noticeable at the Santa Paula
and Aussaguel GES - In general - upgrade appears to have had more of
an impact on the ACTP than on the ADS-C downlink
latency performance