12 Transport stratum
22.5193GPPBusiness communication requirementsTS
12.1 NGN/NGCN interconnection requirements
12.1.1 Redundancy support
An NGN may support the connection of multiple NGCN sites belonging to the same enterprise, where an NGCN site B may serve as a redundant site for another NGCN site A. Redundancy is needed to ensure reachability of the NGCN users located in site A via the redundant site B.
When an NGN detects that an NGCN site cannot accept (totally or partially) communications or detects a failure at the interconnect with the NGCN site, then an NGN shall support failover mechanisms to the NGCN site serving as redundant NGCN site.
12.2 Specific requirements for virtual leased line
NGN may provide the following capabilities:
– A virtual leased line, where NGCN sites are interconnected transparently on IP level through the NGN. (IP level VPN) No additional capabilities are provided by the NGN.
– A virtual leased line, where an NGCN UE (not directly connected to an NGCN site, but connected at the transport stratum to the NGN) and an NGCN site are interconnected transparently on IP level through the NGN. (IP level VPN) No additional capabilities are provided by the NGN.
Annex A (informative):
Change history
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Change history |
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TSG SA# |
SA Doc. |
SA1 Doc |
Spec |
CR |
Rev |
Rel |
Cat |
Subject/Comment |
Old |
New |
Work Item |
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SP-65 |
SP-140500 |
– |
Rel-12 |
Raised to v.12.0.0 following SA’s approval |
2.0.0 |
12.0.0 |
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2015-12 |
– |
– |
– |
– |
– |
Rel-13 |
– |
Updated to Rel-13 by MCC |
12.0.0 |
13.0.0 |
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2017-03 |
– |
– |
– |
– |
– |
– |
– |
Updated to Rel-14 by MCC |
13.0.0 |
14.0.0 |
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2018-06 |
– |
– |
– |
– |
– |
– |
– |
Updated to Rel-15 by MCC |
14.0.0 |
15.0.0 |
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|
SA#88e |
– |
– |
– |
– |
– |
– |
– |
Updated to Rel-16 by MCC |
15.0.0 |
16.0.0 |
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2022-03 |
– |
– |
– |
– |
– |
– |
– |
Updated to Rel-17 by MCC |
16.0.0 |
17.0.0 |
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