EPS paging success rate

Hello, dear.

There are many reasons that affect the call success rate. To improve the call success rate, you need to take measures based on specific causes.

Hi,

Paging Success Rate is rate of successful page responses to First and Repeated Page Attempts to a location area w.r.t. Number of Initial and Repeated Page Attempts to a location area. This parameter is calculated for 24 Hours.

Its standard value >= 92%. LSR = (Number of Page responses to first page to an LA + Number of Page responses to repeated page to an LA) / Number of Page Attempts to an LA (Location Area). OR LSR = (first paging response+ repeated paging response)*100/first paging request)

Hi Hide_on_bush，

Possible Causes

• Uplink and downlink imbalance.

• signal interference.

• SDCCH Occupation by Burst Large-Scale Services.

• Override Vulnerability.

• Paging overload.

• The BTS is out of service.

The preceding causes may be caused by the following events:

• The imbalance between the uplink and downlink may be caused by a large cell coverage area. As a result, the uplink of the edge cell is weak.

• Improper frequency planning and multiplexing cause co-channel and adjacent-channel interference. Interference from external radar stations and repeaters.

• A large-scale location update is performed after the BTS recovers from a sudden power failure.

• The service volume exceeds the planned and designed capacity.

• The parameter settings are incorrect.

• The RACH minimum access level and MS receive signal level are set improperly.

• The proportion of common channels is improperly set.

• Interference detection.

• Traffic statistics analysis.

Optimization Measures

1. Observe the counters related to paging overload and SDCCH congestion.

2. If paging overload and SDCCH congestion are excluded, observe the immediate assignment success rate, interference band measurement, and uplink-downlink balance measurement.

• If the immediate assignment success rate is low in a large number of cells, solve the problem.

• If traffic bursts affect some cells, you can continue to observe the problem by referring to. If no similar phenomenon occurs after multiple periods of time, the fault is automatically rectified.

• If the interference band measurement results show that many cells are at interference levels 5, 6, and 7, strong interference exists. The problem should be solved by locating the interference source, reducing the interference, or removing the interference source.

3. The paging success rate can be improved by optimizing paging policies and parameters based on the local network quality and traffic model on the premise that the network is optimized, the entire network is running properly, and no major hardware or software fault occurs.

• In areas with low traffic, multiple paging times (more than twice) can be used. In areas with high traffic and a large number of paging times, two paging times can be used.

• Reduce the minimum RACH access level and minimum receive level of the MS.

• Indicates the paging waiting interval. There is no specific baseline value. You need to adjust the value based on the actual network conditions.

• Combined BCCH and non-combined BCCH depend on the number of paging times per hour and the number of channels in the cell.

• The proportions of PCHs, AGCHs, and RACHs need to be adjusted based on the number of reserved random access blocks. The adjustment depends on the actual network model and traffic distribution.

Hope this helps！

Good answer