Page 52 - 5G Basics - Core Network Aspects

1 Core network aspects

• Request aggregation function:

It is recommended that DAN elements are equipped with the function to aggregate requests to the
same NDO to reduce network traffic and server load.
• Subscription:

DAN is required to provide a mechanism for an NDO consumer to register description to identify
one or more NDOs which the consumer is interested in receiving when they are published.
• Publication:

DAN is required to provide a mechanism for an NDO producer to publish NDOs to the network. The
published NDOs may be distributed to the consumers whose subscription matches to the published
NDOs.
• Packet forwarding loop avoidance function:
DAN is required to have functions to avoid or resolve packet forwarding loops.

7.2 Routing
 NDO registration function:

It is required that the unique name or ID of an NDO is registered to DAN so that NDO consumers can
access the NDO with the name or ID.
 NDO location resolution function:
DAN optionally provides the facility for a DAN element to ask forwarding direction when the DAN
element cannot judge the forwarding direction of a request for an NDO.
 Advertisement function for the availability of NDOs:
It is required that availability information of NDOs is disseminated to help choosing a right direction
of request forwarding.
 Network selection function for requests to reach an NDO:
It is required that appropriate network interfaces are selected to forward requests in order to reach
a specified NDO.

7.3 Mobility
• Consumer mobility:
DAN is required to provide a mechanism for a consumer to maintain undisrupted message flows
while the consumer is in motion.
• NDO mobility:
DAN is required to provide a mechanism for NDOs to re-locate without disrupting NDO availability
when the NDOs change their locations.
• Network mobility:
DAN optionally provides an efficient mechanism for a network to maintain seamless network
connection for its mobility.

7.4 Security

• Access control:
It is required that DAN is equipped with a mechanism to examine and confirm the authenticity of
consumers and that NDO is accessible only by the authorized consumers.

• Network security function from malicious attacks:
DAN is required to have a mechanism to protect its functions from malicious network attacks.

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