PS Core Configuration Audit Use Case: 4G Quality of Service (QoS) Scheme

Problem

Referring to QCI counters and captured traces, all subscribers have QCI 7, which is NOT designed for normal data traffic and TCP-based applications, due to its nature specifications and high bit error rate.
The QCI values 1–4 are allocated for traffic that requires dedicated resource allocation for a GBR, while values 5–9 are not associated with GBR requirements.

Actions

Reviewing all QCI-8 RF parameters on 4G Cells.
A New Profile has been created on HSS with QCI=8 and assigned to test SIMs on it for testing and evaluation
AFC SL management staff SIMs were provisioned with QCI-8 for evaluation

Results

The recommended action was implemented for test SIMs. Core traces has been validated that the
subscriber’s actual QCI is QCI 8 (from MME Attach Accept Message sent to UE)

Drive test was conducted before and after the change on two different sites to benchmark trial in terms of the LTE downlink throughput which had around 10% increase after the trial for the test SIMs.