Page 1448 - 5G Basics - Core Network Aspects

3 Signalling aspects

Annex A

The scenarios related to BNG pool
(This annex forms an integral part of this Recommendation.)

This annex describes the scenarios related to the BNG pool.

Figure A.1 – The scenario of BNG pool

As shown in Figure A.1, the BNG pool is composed of one controller and multiple BNG devices. Multiple BNG
devices can be located in the same Central Office or different Central Offices, which are inter-connected by
the underlay L2 network. BNG devices are deployed in a moderately centralized manner.
The controller acts as the centralized control unit of the BNG pool.

(1) It manages the membership of the BNG pool, and maintains the state of each member of th BNG
pool.
(2) It monitors the real-time load of each member of the BNG pool. Based on the overall load of the
BNG pool, it realizes the load balancing among the members in the BNG pool.
(3) It monitors the real-time state of each member of the BNG pool. It allocates BNG devices/ports into
different backup groups and helps to synchronize the user access information among BNG devices
within one backup group. Hence, the backup protection among the members in the BNG pool is
realized.
(4) It can configure each member of the BNG pool, and it is possible to perform OAM as a whole in the
BNG pool.
(5) It can receive the requirement from the application and provide differentiated functions for specific
services/users.

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