How to Balancing the DSP Data Resources in BSC
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Transcript of How to Balancing the DSP Data Resources in BSC
Slide 1
1NPI PROCEDURE GUIDELINES How to Balancing the DSP Data Resources in BSC
Confidential 2013
Network and Service Quality ManagementConfidential1
Introduction
As example in BSC Solobaru1 BSC Device Panel is shown in the left figure. And by collecting DPU Load Data before, Pivot Result is correct with the actual DPU Board which installed in this BSC.
Yellow Boxes in the BSC Device Panel are the recommended Slots which usually installed for DPU.
This topic will guide us to Balancing the PDCH in each DSP, in order to Balancing the DSP Utilization Resources in BSC.
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Purpose of BalancingDSP Utilization (%) shown that in each slot of DSP capacity has a maximum number. For DPUd only maximum 45 PDCH each DSP, from 0 to 20, and DSP 21 suggested 0 value for synchronization. And DPUg can handle 75 PDCH, but only from 0 to 13 DSP.
Balancing is needed, for example for Subrack 1, which slot 8 & 9 are very crowded, but for slot 10 just a few. This activity is recommended, to keep the PDCH performance in each DPU Board, maintaining in good performance.
Lets take an example for DPUg in Subrack 1, in the next slide.
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Example of Balancing one Cell Using this Command DSP PSRES, we can choose an example of Subrack 1 Slot 0 of DSP 0 which highly crowded with 88% max PDCH occupied.
When finished execute that Command, many of PDCH will be shown like in the figure. Find the Cell Index and the Channel State of PDCH. When the Channel State goes Unavailable, that means PDCH in current Cell, would be Failure (become red color), the impact is cannot handle Payload.
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Example of Balancing one Cell At the first step we check the Subrack 1 Slot 8 of DSP No. 0, then we choose one of Cell Index, for instance Cell Index 39 which had 11 PDCHs will be relocated to Subrack 1 Slot 10 DSP No. 3 .
We need to check the avaibility PDCH on destination DSP, showed that only 13 PDCHs on those DSP.
So, the number PDCH in this DSP would be approximate of 24 PDCHs (13 + 11) when Cell Index 39 relocated to this DSP.
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Example of Balancing one Cell Type Command SET PSCELLTODSP , put the immediate Cell Index or Cell Name, and the destination of DSP.
When Confirm Box appeared, Choose OK to continue.
Then check again in Subrack 1 Slot 10 DSP No. 3 which Cell Index 39 had been relocated to this DSP.
The PDCH number is increasing become 25 PDCHs at the moment.
Finally, we learn how to Balancing the DSP (DPU Load).
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Example of Balancing After Add DPU
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Display PS Resources(DSP PSRES)FunctionUse this command to display information about PS resources.Note1. This command applies to only 2G cells in the PS domain.2. This command can be used in built-in PCU mode only.ParametersParameter IDParameter NameParameter Description
IDXTYPEIndex TypeMeaning: Query type. The query can be based on DSP, slot or subrack. To query the GPRS cell attributes by DSP, you can only choose a DPU board whose logic function type is GPCU.
GUI Value Range: BYDSP(By DSP), BYSLOT(By Slot), BYSUBRACK(By Subrack)
Unit: None
Actual Value Range: BYDSP, BYSLOT, BYSUBRACK
MML Default Value: None
Recommended Value: None
Parameter Relationship: None
Service Interrupted After Modification : Not involved
Impact on Network Performance: None
SRNSubrack No.Meaning: Number of the subrack
GUI Value Range: 0~11
Unit: None
Actual Value Range: 0~11
MML Default Value: None
Recommended Value: None
Parameter Relationship: None
Service Interrupted After Modification : No (No impact on the UE in idle mode)
Impact on Network Performance: None
SNSlot No.Meaning: Number of the slot
GUI Value Range: 0~27
Unit: None
Actual Value Range: 0~27
MML Default Value: None
Recommended Value: None
Parameter Relationship: None
Service Interrupted After Modification : No (No impact on the UE in idle mode)
Impact on Network Performance: None
DSPNODSP No.Meaning: Number of the Digital Signal Processing (DSP) in the DPU board. The DSP NO.'s value range of DPUb and DPUd board is 0~21 and that of DPUg board is 0~13.
GUI Value Range: 0~21
Unit: None
Actual Value Range: 0~21
MML Default Value: None
Recommended Value: None
Parameter Relationship: None
Service Interrupted After Modification : Not involved
Impact on Network Performance: None
ExampleTo query the PS resources of subrack 0, run the following command:DSP PSRES: IDXTYPE=BYSUBRACK, SRN=0;
The result is as follows:%%DSP PSRES: IDXTYPE=BYSUBRACK, SRN=0;%%RETCODE = 0 Execution succeeded.
Query PS resources---------- Slot No. DSP No. Cell Index Cell Um Administration State Cell Gb Administration State TRX No. Channel No. Channel State
8 5 1 Unblocked Blocked 1 5 Unavailable 8 4 0 Unblocked Unblocked 0 5 Available (Number of results = 2)
--- ENDOutput DescriptionDomain NameDescription
Slot No.Number of the slot where the DPU processing GPRS-cell-related services is located
DSP No.Number of the DSP on the DPU processing GPRS-cell-related services
Cell IndexIndex of a 2G cell
Cell Um Administration StateThe cell Um administration state can be Blocked or Unblocked. Blocked: The Um interface of the cell is blocked manually or faulty.
Cell Gb Administration StateThe cell Gb administration state can be Blocked or Unblocked. Blocked: The Gb interface of the cell is blocked manually or faulty.
TRX No.Number of the TRX in the BTS
Channel No.Number of the channel in the TRX
Channel StateThe channel can be in unavailable state or available state.
Set PS Cell Distribution on DSP(SET PSCELLTODSP)FunctionUse this command to re-allocate the general packet radio service (GPRS) cell on the DSP.Note1. To bind a GPRS cell to a specific DSP, you can only choose a DPU board whose logic function type is GPCU.2. This command applies to only 2G cells in the PS domain.3. After running this command, you can use DSP PSCELL to query the allocation result.4. This command can be used in built-in PCU mode only.ParametersParameter IDParameter NameParameter Description
IDXTYPEIndex TypeMeaning: Index type, supporting the index based on the cell and BSC mode.
GUI Value Range: BYCELL(By Cell), BYBSC(By BSC)
Unit: None
Actual Value Range: BYCELL, BYBSC
MML Default Value: None
Recommended Value: None
Parameter Relationship: None
Service Interrupted After Modification : No (No impact on the UE in idle mode)
Impact on Network Performance: None
IDTYPEIndex TypeMeaning: Subscribers can specify the cell according to the index or the name.
GUI Value Range: BYNAME(By Name), BYID(By Index)
Unit: None
Actual Value Range: BYNAME, BYID
MML Default Value: None
Recommended Value: None
Parameter Relationship: None
Service Interrupted After Modification : No (No impact on the UE in idle mode)
Impact on Network Performance: None
CELLIDCell IndexMeaning: Index of a cell, uniquely identifying a cell in a BSC.GSM cells are uniquely but not necessarily consecutively numbered within a BSC. For example, you can number a GSM cell 0 and number another GSM cell 3.
GUI Value Range: 0~2047
Unit: None
Actual Value Range: 0~2047
MML Default Value: None
Recommended Value: None
Parameter Relationship: None
Service Interrupted After Modification : No (No impact on the UE in idle mode)
Impact on Network Performance: None
CELLNAMECell NameMeaning: Name of a cell. This parameter uniquely identifies a cell in a BSC.Cell names cannot contain the following invalid characters:, ; = " ' In addition, cell names cannot contain two or more consecutive %, two or more consecutive spaces, or more than two consecutive +.
GUI Value Range: None
Unit: None
Actual Value Range: 1~64 characters
MML Default Value: None
Recommended Value: None
Parameter Relationship: None
Service Interrupted After Modification : No (No impact on the UE in idle mode)
Impact on Network Performance: None
SRNSubrack No.Meaning: Number of the subrack
GUI Value Range: 0~11
Unit: None
Actual Value Range: 0~11
MML Default Value: None
Recommended Value: None
Parameter Relationship: None
Service Interrupted After Modification : No (No impact on the UE in idle mode)
Impact on Network Performance: None
SNSlot No.Meaning: Number of the slot
GUI Value Range: 0~27
Unit: None
Actual Value Range: 0~27
MML Default Value: None
Recommended Value: None
Parameter Relationship: None
Service Interrupted After Modification : No (No impact on the UE in idle mode)
Impact on Network Performance: None
DSPNODSP No.Meaning: Target DSP number. The DSP NO.'s value range of DPUb and DPUd board is 0~21 and that of DPUg board is 0~13.
GUI Value Range: 0~21
Unit: None
Actual Value Range: 0~21
MML Default Value: None
Recommended Value: None
Parameter Relationship: This parameter is valid only when IDXTYPE is set to BYCELL.
Service Interrupted After Modification : Yes
Impact on Network Performance: None
Example1. To allocate cell 0 to DSP 0 in slot 8 of subrack 0, run the following command:SET PSCELLTODSP: IDXTYPE=BYCELL, IDTYPE=BYID, CELLID=0, SRN=0, SN=8, DSPNO=0;
2. To set the parameters related to the distribution of all GPRS cells (Index Type = BYBSC), run the following command:SET PSCELLTODSP: IDXTYPE=BYBSC;