Online anomaly detection for energy efficiency control in cell free wireless communications network
OwnerManijeh BASHARinventor
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Abstract
The present disclosure relates to the optimization of user energy efficiency in Cell-Free Massive MIMO systems of the 6G mobile network. This is achieved by tracking the user's energy efficiency as a multi-variate time series and then utilizing an anomaly detection algorithm to detect if a user's energy efficiency drops to problematic levels. As a result of detecting an anomaly in the user's energy efficiency the algorithm can decide whether to support the user at a different frequency or access point, or that no remedial action is needed.
Claims16
A method for detecting an anomalous event in user energy efficiency in a cell-free wireless telecommunications network, the cell-free wireless telecommunications network comprising a plurality of access points configured to serve one or more users, the method comprising:
- obtaining a transmission power for a user over a large-scale fading coherence time;
- obtaining a time series of small-scale fading instantaneous energy efficiency values relating to a small-scale fading coherence time, wherein the small-scale fading coherence time is less than the large-scale fading coherence time such that multiple small-scale fading instantaneous energy efficiency values are contained in the time series per large-scale fading coherence time;
- identifying one or more anomaly periods of anomalous instantaneous energy efficiency values within the time series of small-scale fading instantaneous energy efficiency values;
- and
- causing a reconfiguration of the user within the cell-free wireless telecommunications network in dependence on identification of the one or more anomaly periods of anomalous instantaneous energy efficiency values.
A system for detecting anomalous events in user energy efficiency in a cell-free wireless telecommunications network having a plurality of users and access points, the system comprising:
- a processor;
- and
- a computer-readable medium having stored thereon computer executable instructions that when executed trigger the processor to:
- calculate and fix a transmission power for a user using a large-scale fading components;
- calculate an instantaneous energy efficiency of the user using the fixed transmission power and a small-scale fading component;
- identify a sustained drop in user energy efficiency indicative of an anomalous event;
- determine a length of the anomalous event;
- and
- reconfigure the user based on the length of the anomalous event in comparison with a small-scale coherence time and a large-scale coherence time.
Dependencies are inferred from the claim text.