Heterogeneous Network is a collective term for a network comprising radio nodes of varying sizes and roles, from small
base station nodes to big macro base station nodes. The purpose of using a heterogeneous network is to improve
capacity and/or coverage, and to allow a variation of role over time for some of the nodes in order to optimize the
Also small base station nodes may perform two roles and may switch role as necessary:
As the number of nodes to be managed will increase significantly by introducing small base station nodes, the
management of the network must change.
Because of the large number of small base stations, it is essential to minimize the set of configuration parameters. It is
also desirable to minimize the set of configuration parameters for the macro base stations. This means that there is no
difference from minimization of configuration point of view for managing small or large base stations.
Because a significant proportion of the network traffic will be carried by small base stations, the need for providing
alarms and network KPIs are the same for small base stations as for big macro base stations. So also from PM and FM
point of view there is no difference on the type of information that needs to be managed depending on the size of the
What needs to change is the volume of data that needs to be decreased over Itf-N. However, some base stations are
more important to be managed in real time. In order to keep CAPEX and OPEX down, it must be possible to choose
how the management info is propagated to the NMS. Different criteria can be used to have all information on line (as
before), to only get information when the manager requests it, or something in between.
The present document investigates and makes recommendations on how management information can be selected by
the manager over Itf-N for heterogeneous networks (see TR 21.905
) nodes that are owned, deployed and maintained
by the operator.
The nodes that are owned, deployed or maintained by residential users are out of scope of the present document, such as
Home NodeBs, Home eNodeBs.