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ABSENCE: Usage-based Failure Detection in Mobile Networks
Binh Nguyen, Zihui Ge, Jacobus Van der Merwe, He Yan, Jennifer Yates Mobicom 2015
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Silent failures
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EPC core core RAN
ABSENCE: Usage-based Failure Detection in Mobile Networks Binh - - PowerPoint PPT Presentation
ABSENCE: Usage-based Failure Detection in Mobile Networks Binh - - PowerPoint PPT Presentation
ABSENCE: Usage-based Failure Detection in Mobile Networks Binh Nguyen , Zihui Ge, Jacobus Van der Merwe, He Yan, Jennifer Yates Mobicom 2015 1 Silent failures EPC core core RAN 2 Silent failures EPC core core RAN Silent failures:
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SLIDE 3
Silent failures
- Silent failures: service disruptions/outages that are not detected by current
monitoring systems.
- New features rolled out, bugs on devices, or combination of both.
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EPC core core RAN
SLIDE 4
Silent failures
- Silent failures: service disruptions/outages that are not detected by current
monitoring systems.
- New features rolled out, bugs on devices, or combination of both.
2
EPC core core RAN
SLIDE 5
Silent failures
- Silent failures: service disruptions/outages that are not detected by current
monitoring systems.
- New features rolled out, bugs on devices, or combination of both.
2
EPC core core RAN
Detecting silent failures is challenging!
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Detecting silent failures is difficult - passive network monitoring
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Detecting silent failures is difficult - passive network monitoring
- Drops in traffic/usage on network elements do not imply service disruptions:
- Load balancing/maintenance activities.
- Dynamic routing/Self-Organizing Network (SON).
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Load balancing event
Load Time
expected load actual load
SLIDE 8
Detecting silent failures is difficult - passive network monitoring
- Drops in traffic/usage on network elements do not imply service disruptions:
- Load balancing/maintenance activities.
- Dynamic routing/Self-Organizing Network (SON).
- Key Performance metric Indicators (KPI) may not reflect service issues:
- E.g., accessibility KPI looks good even when only a subset of users can access the network.
3
Load balancing event
Load Time
expected load actual load
SLIDE 9
Detecting silent failures is difficult - passive network monitoring
- Drops in traffic/usage on network elements do not imply service disruptions:
- Load balancing/maintenance activities.
- Dynamic routing/Self-Organizing Network (SON).
- Key Performance metric Indicators (KPI) may not reflect service issues:
- E.g., accessibility KPI looks good even when only a subset of users can access the network.
3
Load balancing event
Load Time
expected load actual load
SLIDE 10
Detecting silent failures is difficult - active service monitoring
4
EPC core RAN
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Detecting silent failures is difficult - active service monitoring
- Sending test traffic across the network on all service paths.
4
EPC core RAN
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Detecting silent failures is difficult - active service monitoring
- Sending test traffic across the network on all service paths.
- Many types of customer devices, applications, huge geographic environment
to probe.
4
EPC core RAN