Measurement Result
Recording (MRR) is a tool for measuring the radio characteristics of
the connections between MSs and the network. MRR records information on the
radio characteristics of the dedicated channels and calculates statistics on
the data recorded.
MRR utilises the data that the BSC receives
from the BTS in Measurement Results. These data include the results of the
measurements performed by both the BTS and the MS.
The purpose of the feature is to provide the
operator with a facility for compiling statistics on the radio interface. The
feature makes it easier for the operator to supervise the radio network. It
also makes it possible for the operator to determine correlations within the
collected data.
The MRR application can be used for:
- Supervision
of the network performance
- Troubleshooting
of the network
- Comparison
of the network performance before and after a change is made to the network
MRR is a feature in the Operation and Support
System (OSS). Recordings can be defined, scheduled, ended, stored and processed
in OSS. The user can generate a large number of reports that can be used to
analyse each recording and make comparisons. MRR is based on a function in the
BSC, where it is possible to initiate and to end a recording by command. All
data are recorded initially by the BSC and stored in a binary file that can be
output directly or forwarded to OSS for further processing.
The measured radio characteristics are:
- Signal
strength in both Uplink (UL) and Downlink (DL).
- Signal
Quality in both UL and DL.
- Timing
Advance (TA).
- Power
level used by the MS and Power reduction of the BTS.
- UL and DL
Pathloss.
- Pathloss
difference (Pathloss DL - Pathloss UL).
The radio characteristics can be recorded for
one or more cell sets simultaneously by initiating one or more recordings. A
cell set can comprise one or more cells.
The user can filter the data received from a
Measurement Result by specifying recording thresholds. Recording thresholds can
be specified for either one or two specified radio characteristics. The use of
recording thresholds allows the user to determine: radio performance, the
causes of poor radio performance and correlations between different radio
characteristics. As a special filtering option, connections using Adaptive
Multi Rate full rate (AMR FR) can be selected to be included or excluded from
the results.