Radio Performance intro

Performance measurements are essential for the surveillance of a mobile network.They provide information about
- the availability of network resources
- traffic behaviour and load
- quality of service

These information are used by the operator e.g. for identifying failures and problem zones within the network which are not detected by fault management and help to optimize and extend the existing network.

Each measurement taken alone gives only elementary information. However, com-bined with other measurements and together with additional information (e.g. alarms, configuration data) they provide valueable overall information about what is going on in the network.

The Base Station provides a set of performance measurements for network surveillance.

Kind of counters
The performance measurement data are collected in each NE of the BSC using the follwing kinds of counters:
- cumulative incremental counters (CC), incremented by the occurence of the measured event.
- gauges (dynamic variable), used when data being measured can vary up or down during the period of measurement;
- status inspection (SI).

Performance Measurement Administration
Performance measurements are initated by creating measurement jobs (called scanners). The attributes of a scanner define
- the types of measurements performed
- the objects observed by these measurements
- the way and time measurement reports are generated and sent to the OMC

Significant enhancements in the administration of scanners are needed in order to give the operator more flexibility in managing measurement jobs and to speed up the actions necessary to initate measurements within the BSC.

The most important enhancements are:
- more than one measurement type can be included within one scanner. In fact all measurement types observing the same kind of object may be included within one scanner
- more than three objects may be monitored by one scanner. In fact the maximum number of configurable objects may be included in one measurement job.

There are some exceptions to these rules.However, the description of single restrictions is not the scope of this document.

Measurement jobs periodically collect measurement results in the network elements and generate measurement result notifications. The periodicity of measurement collection is specified by the granularity period. Result notifications are either sent directly to the OMC (reporting type 'by event') or are temporarily stored in a log file on the BSC (reporting type 'by file').

The operator may run a measurement job according to a schedule on a weekly or daily basis.

While a measurement job is active the operator may request the current values of the measurements running in this job. The results are displayed on the OMC but not logged into the database. This request does not affect the periodic reporting or the schedule of the measurement job.

These are some of the measurement in BSC level, ie, siemens BR9 :
- Mean Number of busy TCHs
- All available TCH allocated Time
- Number of lost radio Links while using a TCH
- Number of lost Radio Links while using an SDCCH
- Successful internal Handovers, intra-Cell
- Successful incoming internal inter Cell Handovers per originating Cell
- Successful outgoing internal inter Cell Handovers per target Cell
- Successful internal Handovers per BSC
- Mean Number of SDCCHs
- Attempted SDCCH Seizures meeting an SDCCH blocked State
- All available SDCCH allocated Time