In 5G Planning, you need to know that Massive Mimo can generate both static and dynamic beams, check our article about benefits of massive mimo here.
1. For SS Block, CSI-RS and cell-level data in PDCCH, static broadcast beams are used.
Those 5G static broadcast beams cover the entire cell through the narrow-beam polling mode and those Narrow beams are transmitted over proper time-frequency resources.
Those Broadcast beams need also to be configured based on the scenario so these beams will be fixed once they are formed the first time on initial UE access to cell , this is why they are called Static beams.
2. For UE data in the PDSCH, UE-level dynamic beams are used.
Based on UE signal quality, more optimized beams will be allocated for higher throughput and beams will be more optimized and narrower for interference reduction. Also beam steering will be done according to user movements. So the concept of predefined beam location will be break here. That is how the are called dynamic beams.
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Don’t miss our 5G NR RF Planning Training to understand in details how 5G Planning is done compare also with 4G, below more details about the 5G training.