SON
Self-Organizing Network: automated RAN management with self-configuration (plug-and-play), self-optimization (parameter tuning), and self-healing (fault recovery).
The whole point of SON was to stop engineers hand-tuning thousands of cells one parameter at a time. It splits into three jobs that get grouped together but behave quite differently. Self-configuration handles a new site coming online — it pulls its software, transport config and initial radio parameters with minimal manual touch, so a node ideally joins the network close to plug-and-play. Self-optimization is the ongoing part: neighbour lists, handover thresholds and load settings get nudged as conditions change. Self-healing watches for failures, like a cell going down, and reacts — for example raising the power or tilt of surrounding cells to fill the coverage hole until the fault is fixed.
In practice SON runs in two flavours: distributed (logic sits in the eNB/gNB) and centralized (logic sits in the management system with a wider view). Most real deployments are a hybrid, and the centralized side is increasingly where ANR, MRO and MLB policies are coordinated.
Frequently asked questions
- Is SON the same as RAN automation or AI in the RAN?
- SON is the older, rules-and-thresholds form of RAN automation defined back in the LTE era — discrete functions like ANR, MRO and MLB with fairly deterministic behaviour. The newer AI/ML and intent-based automation (think rApps and xApps in O-RAN, or the RIC) overlaps heavily and is in many ways SON's successor, but they are not identical. A lot of operators run classic SON functions and ML-driven optimization side by side.
Related terms
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