Parameter Name |
Period of Periodic Location Update(6 minutes) |
|---|---|
Description |
This parameter specifies the length of the timer for periodic location update. In the VLR, a regular location update timer is defined. When the location update period decreases, the service performance is improved. When the signaling traffic of the network increases, the usage of radio resources drops.In addition, when the location update period decreases, the MS power consumption increases, and the average standby time is greatly shortened.When setting this parameter, take into consideration the processing capability of the MSC and BSC, the load on the A interface, Abis interface, Um interface, HLR, and VLR. Generally, a larger value is adopted in continuous coverage in urban areas and a smaller value in suburbs, rural areas, or blind spots. |
GUI Value Range |
[0,255] |
Default Value |
20 |
Unit |
Minutes |
Step |
6 min |
Modification Rules |
None |
Configuration Policy |
It is recommended that you select a greater value, such as 16, 20, or 25, in the area with heavy traffic, but a smaller value, such as 2 or 3, in the area with light traffic. To properly specify the value of this parameter, it is necessary to perform overall and long-term measurement on the entities involved regarding their processing capability and traffic, such as the processing capability of the MSC and BSC, and the load on the A interface, Abis interface, Um interface, HLR, and VLR. The location update period in the MSC must be greater than that in the BSC. In the GSM system, it is possible that a powered-on MS is identified as implicit off-line if the MS sends no location update request within a long period. When the MS reselects another cell (in the same LAC), the MS is restarted through T3212 timeout if the T3212 of the new cell differs from that of the original cell. When this parameter differs in the cells of the same LAC, it is possible that the MS is identified as implicit off-line if the MS sends no location update request for a long period. In this case, system plays "The subscriber you dial is power off." even though the called MS is on. In an LAC, the value of this parameter should be the same in all cells. |
Recommended Value |
The typical configurations of this parameter are as follows: 20-30 (urban areas) 10-20 (suburbs) 8-10 (mountainous areas) It is recommended that you select a greater value, such as 16, 20, or 25, in the area with heavy traffic, but a smaller value, such as 2 or 3, in the area with light traffic. To properly specify the value of this parameter, it is necessary to perform overall and long-term measurement on the entities involved regarding their processing capability and traffic, such as the processing capability of the MSC and BSC, and the load on the A interface, Abis interface, Um interface, HLR, and VLR. The value of T3212 can be increased when an entity involved is overloaded.Time limits of regular location update in the VLR/BSC can be adjusted flexibly to improve the system connection rate, reduce invalid paging requests, and to enhance the LAC capacity. |
Parameter Relationship |
None |
BSC Feature |
Location Updating |
Parameter Class |
Parameters About Radio Resources |
Caution |
None |