Accurate RAN Planning Saves Billions
validate the actual RSRP in each location. Any error between these RSRP values will translate directly into lower SINR for users, either due to higher path loss than predicted or higher interference than predicted.
Looking at some results from the field, we estimate that when actual RSRP is 1 dB lower than desired, for typical users this can result in 0.5 to 0.9 dB in lower SINR. If actual RSRP is 1 dB higher than anticipated, many users would lose capacity due to higher interference. (The amount of capacity lost is more difficult to quantify in the case of high power/interference.)
We calculated the business impact of a 1 dB improvement in RSRP precision by:
1. Converting the RSRP error into SINR impact; 2. Translating SINR impact into spectral efficiency impact;
3. Estimating the capacity and cost of network deployment over five frequency bands, including macro, massive MIMO, and small cells. (See the Mobile Experts Business Case model) Our modeling showed that 1 dB improvement in RSRP precision can make a huge difference in capacity for the mobile operator. In a nationwide network, 1 dB higher precision in RSRP leads to roughly 0.4 bps/Hz overall improvement in spectral efficiency. With the same numbers of ra dios and the same antennas, that’s a 24% increase of capacity!
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