Service failure in communications networks

A network node for indicating service failure in a communications network, the network node comprising a processing unit and a non-transitory computer readable storage medium, said non-transitory computer readable storage medium comprising instructions executable by said processing unit whereby said network node is operative to:

• acquire at least one N-dimensional vector of key performance indicator, KPI, values from at least one network equipment device;
• determine an outlier score for said at least one N-dimensional vector by using an L-valued outlier scoring function based on N-dimensional regions Rk, k=1, . . . , L, where L>1, and where region Ri is at least partly enclosed by region Rj, and wherein said outlier score for said N-dimensional vector is dependent on in which of said N-dimensional regions Rk said N-dimensional vector is located;
• and
• determine an indication of service failure for said at least one network equipment device based on said outlier score for said at least one N-dimensional vector.

A computer program product for indicating service failure in a communications network, the computer program product being stored on a non-transitory computer readable storage medium and comprising computer program instructions that, when executed by a processing unit, causes the processing unit to:

• acquire at least one N-dimensional vector of key performance indicator, KPI, values from at least one network equipment device;
• determine an outlier score for said at least one N-dimensional vector by using an L-valued outlier scoring function based on N-dimensional regions Rk, k=1, . . . , L, where L>1, and where region Ri is at least partly enclosed by region Rj, and wherein said outlier score for said N-dimensional vector is dependent on in which of said N-dimensional regions Rk said N-dimensional vector is located;
• and
• determine an indication of service failure for said at least one network equipment device based on said outlier score for said at least one N-dimensional vector.

A network node for indicating service failure in a communications network, the network node comprising:

• an acquire module for acquiring at least one N-dimensional vector of key performance indicator, KPI, values from at least one network equipment device;
• a determine module for determining an outlier score for said at least one N-dimensional vector by using an L-valued outlier scoring function based on N-dimensional regions Rk, k=1, . . . , L, where L>1, and where region Ri is at least partly enclosed by region Rj, and wherein said outlier score for said N-dimensional vector is dependent on in which of said N-dimensional regions Rk said N-dimensional vector is located;
• and
• a determine module for determining an indication of service failure for said at least one network equipment device based on said outlier score for said at least one N-dimensional vector.