jkpllan3
2016-12-01, 01:41 AM
Hi,
U2000 documentation states:
"Add PRACH Basic Information(ADD UPRACHBASIC)
Function
Use this command to add the basic information to a PRACH. At least one PRACH should be configured to each cell.
1. Based on the product specifications, it is recommended to allocate the common physical channel IDs (PhyChId) in cells as follows:
0 for the PhyChId of the PSCH.
1 for the PhyChId of the SSCH.
2 for the PhyChId of the PCPICH.
3 for the PhyChId of the PCCPCH.
4 for the PhyChId of the first PRACH and 6 for the corresponding AICH.
8 for the PhyChId of the first SCCPCH and 10 for the PhyChId of the corresponding PICH.
9 for the PhyChId of the second SCCPCH.
2. Based on the product specifications, it is recommended to allocate the common transport channel IDs (TrChId) in a cell as follows:
0 for the TrChId for the BCH.
1 for the TrChId of the RACH.
3 for the TrChId of the PCH.
4 for the TrChId of the FACH bearing signalling and 5 for the TrChId of the FACH bearing services on the first SCCPCH.
6 for the TrChId of the FACH bearing signalling and 7 for the TrChId of the FACH bearing services on the second SCCPCH."
To me it seems possible to have more than one RACH (TrChId 2), an I wrong? Can someone share an example script with more than one RACH?
In my network we had DTCH congestion, and I decided to increase the FACH bandwith (2 SCCPCH are configured). The DTCH congestion was eliminated but the RACH load increased as well and it seems like this increase in RACH load is producing an increase in RRC Setup Failures (No Reply).
U2000 documentation states:
"Add PRACH Basic Information(ADD UPRACHBASIC)
Function
Use this command to add the basic information to a PRACH. At least one PRACH should be configured to each cell.
1. Based on the product specifications, it is recommended to allocate the common physical channel IDs (PhyChId) in cells as follows:
0 for the PhyChId of the PSCH.
1 for the PhyChId of the SSCH.
2 for the PhyChId of the PCPICH.
3 for the PhyChId of the PCCPCH.
4 for the PhyChId of the first PRACH and 6 for the corresponding AICH.
8 for the PhyChId of the first SCCPCH and 10 for the PhyChId of the corresponding PICH.
9 for the PhyChId of the second SCCPCH.
2. Based on the product specifications, it is recommended to allocate the common transport channel IDs (TrChId) in a cell as follows:
0 for the TrChId for the BCH.
1 for the TrChId of the RACH.
3 for the TrChId of the PCH.
4 for the TrChId of the FACH bearing signalling and 5 for the TrChId of the FACH bearing services on the first SCCPCH.
6 for the TrChId of the FACH bearing signalling and 7 for the TrChId of the FACH bearing services on the second SCCPCH."
To me it seems possible to have more than one RACH (TrChId 2), an I wrong? Can someone share an example script with more than one RACH?
In my network we had DTCH congestion, and I decided to increase the FACH bandwith (2 SCCPCH are configured). The DTCH congestion was eliminated but the RACH load increased as well and it seems like this increase in RACH load is producing an increase in RRC Setup Failures (No Reply).