GSM/EDGE BSS, Rel. GSM 17, Operating Documentation, Issue 04 RG301936: Intelligent MCPA TRX Shutdown DN09130647 Issue 01C Approval Date 2014-11-25
RG301936: Intelligent MCPA TRX Shutdown
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Table of Contents This document has 19 pages Summary of changes..................................................................... 6 1
Introduction to the feature.............................................................. 7
2
Benefits.......................................................................................... 8
3
Requirements.................................................................................9
3.1 3.2
Software requirements...................................................................9 Hardware requirements..................................................................9
4 4.1
Functional description.................................................................. 10 Functional details.........................................................................10
5 5.1 5.2
System impacts............................................................................12 Interdependencies between features........................................... 12 Impacts on interfaces...................................................................13
5.3
Impacts on system performance and capacity.............................13
6 6.1 6.2
User interface...............................................................................14 Parameters...................................................................................14 MML commands...........................................................................14
6.3 6.4
Alarms.......................................................................................... 14 Measurements and counters........................................................15
7 7.1 7.2
Activating and configuring the featur e..........................................16 Activating the Intelligent MCPA TRX shutdown............................16 Deactivating the Intelligent MCPA TRX shutdown....................... 17
8 8.1
Abbreviations............................................................................... 18 0 – Z............................................................................................. 18
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RG301936: Intelligent MCPA TRX Shutdown
List of Figures Figure 1
4
TRX power down based on the MCPA priority ...................................11
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RG301936: Intelligent MCPA TRX Shutdown
List of Tables Table 1
Software requirements for different network elements......................... 9
Table 2
Hardware requirements for different network elements........................9
Table 3
New parameters................................................................................. 14
Table 4
Modified parameters...........................................................................14
Table 5
New counters......................................................................................15
Table 6
Modified counters............................................................................... 15
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Summary of changes
RG301936: Intelligent MCPA TRX Shutdown
Summary of changes Changes between document issues are cumulative. Therefore, the latest document issue contains all changes made to previous issues. Changes between issues 01B (2014-03-07, RG30) and 01C (2014-11-20, RG30) Software requirements •
The software releases have been corrected for the BTS types.
Activating the Intelligent MCPA TRX shutdown •
The software releases have been corrected for the BTS types.
Functional details •
Information about restrictions with the pipe sharing between TRXs has been added.
Changes between issues 01A (2013-04-16, RG30) and 01B (2014-03-07, RG30) Interdependencies between features •
The information on the Baseband hopping and Common BCCH and Multi BCF has been updated.
Changes between issues 01 (2012-12-19, RG30) and 01A (2013-04-16, RG30) The Verification section has been updated.
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Introduction to the feature
1 Introduction to the feature The feature “RG301936: Intelligent MCPA TRX shutdown” is an enhancement of the “BSS20984: 2G TRX Automatic Power Down” feature. The Intelligent MCPA TRX shutdown feature improves the shutdown functionality of power amplifier in MCPA BTS to save power during low traffic conditions. The 2G TRX automatic power down functionality in BSC is improved so that TRX-MCPA association is taken into account when TRXs are powered down and up. MCPA can be shutdown as soon as all TRXs connected to it have been powered down. The feature is controlled by ON/OFF license key.
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Benefits
RG301936: Intelligent MCPA TRX Shutdown
2 Benefits The “Intelligent MCPA TRX shutdown” feature allows the operator to save power.
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Requirements
3 Requirements 3.1 Software requirements Software requirements for different network elements
Table 1
Network element
Required software release
BSC
S16.1
Flexi Multiradio BTS
EX 5.1
Flexi Multiradio 10 BTS
GF1 1.0.0
Flexi Compact BTS
GFC1 1.0.0
NetAct
OSS5.4 CD3
3.2 Hardware requirements Table 2
Hardware requirements for different network elements
Network element
Required hardware
BSC
BSC3i, mcBSC
BTS
Flexi Multiradio BTS, Flexi Multiradio10 BTS, Flexi Compact BTS
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Functional description
RG301936: Intelligent MCPA TRX Shutdown
4 Functional description The feature “RG301936: Intelligent MCPA TRX shutdown” is an enhancement to “BSS20984 2G TRX Automatic Power Down” feature. BSC controls the functionality of this feature with the following parameters: • • •
2G TRX Power Down Supervision Period - BSC level. 2G TRX Power Down Threshold - segment level. 2G TRX Power Up Threshold - segment level.
These parameters are configured in the same way as described in the existing “BSS20984 2G TRX Automatic Power Down feature” and are re-used for this feature “RG301936 Intelligent MCPA TRX shutdown”. For more information see “ BSS20984 2G TRX Automatic Power Down ”. The BSC selects TRXs to be powered down and up based on traffic and it commands BTS to power down and power up the TRXs. BTS shuts down the PA when all the TRXs are powered down. The TRXs of MCPA BTS are associated with certain MCPA unit. Maximum number of TRXs per MCPA unit is six.
4.1 Functional details BSC considers TRX-MCPA association for powering down and powering up TRXs. TRX power down based on TRX-MCPA association TRXs connected to the BCCH MCPA or MCPA shared with other technologies or MCPA with ETRXs are not powered down. If MCPA is shared with other technologies BTS reports that to BSC. TRXs connected to the other MCPAs are powered down so that the MCPA with least working TRXs is preferred. This way the PAs are shutdown as soon as allowed by the traffic. The MCPA Priority is considered while powering down TRXs connected to different MCPAs. The MCPA Priority from the lowest to the highest order are shown below: • • • • • • •
A GPRS-disabled TRX (GTRX=N) is preferred to be powered down before a GPRS enabled TRX (GTRX=Y). TCH TRXs with the non-preferred BCCH TRX mark (PREF=N) are preferred to powered down before TCH TRXs with the preferred BCCH TRX mark (PREF=P). An MCPA with more powered down TRXs is preferred to an MCPA with less powered down TRXs. A TCH TRX is preferred to be powered down before an SDCCH TRX. In the segment environment, TCH TRXs in the non-BCCH BTS(s) are preferred to powered down before TCH TRXs in the BCCH BTS. Non-BB hopping and non-antenna hopping TRXs are preferred to be powered down before a BB hopping layer and antenna hopping BTS. A TRX without GPRS territory is preferred to be powered down before a TRX with GPRS territory.
The selection of TRX to be powered down based on the MCPA priority is explained in the below figure:
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Figure 1
Functional description
TRX power down based on the MCPA priority
In the above figure TRXs in MCPA 2 has the highest number of TRXs in powered downstate, hence BSC first prefers the TRXs in MCPA2 and then TRXs in the MCPA3 for power down. BSC does not select the TRXs in MCPA1 as it has an associated BCCH TRX. The following are the TRXs that are impossible for power down: TRXs from MCPAs having a BCCH TRX TRXs from MCPAs having RF sharing with other technologies TRXs from MCPAs having Extended TRXs
• • •
TRX power up based on TRX-MCPA association BSC powers TRXs up in reversed order of TRX power down. BSC first prefers the MCPA with BCCH TRX connection when possible configuration changes of MCPA occurs, for example BCCH swap from one MCPA to another while TRXs are in powered down state.
g
Note: The rules in this chapter apply to configurations, where BCCH pipe is not shared between two or more BTS objects in BSC. If BCCH pipe is shared between two or more BTS objects in BSC, then the TRXs in that pipe (except in the BCCH BTS) are powered down during low traffic.
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System impacts
RG301936: Intelligent MCPA TRX Shutdown
5 System impacts This chapter is divided into the following sections: • • •
Interdependencies between features Impacts on interfaces Impacts on system performance and capacity
5.1 Interdependencies between features BSS20984 2G TRX Automatic Power Down feature The feature BSS20984 2G TRX Automatic Power Down feature licence is needed to activate Intelligent MCPA TRX shutdown feature.The Intelligent MCPA TRX shutdown feature uses the TRX power down and power up functionalities of 2G TRX Automatic Power Down feature. For power down functionality in segment consisting of Multiradio BTS and Flexi EDGE BTS the best TRX (with Lowest Priority) between the DTRX and MCPA-TRX is selected. If both priorities are same then MCPA TRX is selected for power down. For power up functionality selection of TRX is in the reverse order irrespective of priority that is either MCPA TRX or a DTRX TRX is selected. Shared RF configurations If the RF configuration of the MCPA is shared with other technology, BSC does not power down the TRXs. RG301794 BSS support for Baseband Resource Sharing BSS support for Baseband Resource Sharing feature cannot be activated simultaneously with Intelligent MCPA TRX shutdown feature. Extended Cell range The Intelligent MCPA TRX shutdown feature does not support the extended and super extended area TRXs. An MCPA with atleast one extended or super extended area TRX connected to it cannot be shut down. Baseband hopping Baseband hopping TRXs are not powered down one by one. Power down is performed for all those TRXs that are possible to power down at same time and not one by one. This is to avoid extra blocking of all baseband hopping group TRXs as it is required when TRX(s) is added to or removed from baseband hopping group. If Baseband hopping TRXs are distributed between a BCCH MCPA and non BCCH MCPA or RF shared MCPA and non BCCH MCPA then TRXs in the BCCH MCPA and RF shared MCPA are never powered down. Power up is performed for all powered down TRXs at same time. BSS21507 Flexible MCPA TX Power Pooling The Flexible MCPA TX Power Pooling feature supports the Intelligent MCPA TRX shutdown feature.
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System impacts
GPRS/EGPRS The Intelligent MCPA TRX shutdown feature can be used with (E)GPRS. The operators should use TRXs connected to the BCCH MCPA for (E)GPRS because BSC does not power down TRX with PS territory. The BSC does not decrease the PS capacity of a segment, but it changes the place of the PS territory to enable TRX power down. Downlink Dual Carrier (DLDC) The Intelligent MCPA TRX shutdown feature supports Downlink Dual Carrier. A DLDC enabled territory is never moved to power down a TRX. The operators should use TRXs connected to the BCCH MCPA for DLDC. Composite Multisite cell The Intelligent MCPA TRX shutdown feature does not support the Composite Multisite cell. The operators should not activate 2G TRX Automatic Power Down in Composite Multisite cells. Common BCCH and Multi BCF BSC measures the traffic amount in segment level. For power down the TCH TRXs in the non-BCCH BTS(s) are preferred to power down before TCH TRXs in the BCCH BTS. For power up the TCH TRXs in the BCCH BTS are preferred to power up before TCH TRXs in the non-BCCH BTS(s). All TRXs in the segment belonging to same MCPA with BCCH TRX but are on non BCCH BTS will be set BL-PWS.
5.2 Impacts on interfaces Abis - O&M interface With the RF_Sharing_info IE in the BTS_CONF_COMPL message, the BTS notifies the BSC about whether the TRX has RF sharing with other technologies.
5.3 Impacts on system performance and capacity The feature “RG301936: Intelligent MCPA TRX shutdown” has no impact on capacity and performance.
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User interface
RG301936: Intelligent MCPA TRX Shutdown
6 User interface This chapter is divided into the following sections: • • • •
Parameters MML commands Alarms Measurements and counters
6.1 Parameters Table 3: New parameters lists parameters introduced with this feature New parameters
Table 3
Full Name
Abbreviated Name
MCPA RF Sharing Info
MCPARF
Managed Object
BCF
Table 4: Modified parameters lists parameters modfied by this feature Modified parameters
Table 4
Full Name
Abbreviated Name
Managed Object
MCPA Identity Port ID
MCPAIP
BCF
MCPA Identity Position
MCPAIS
BCF
MCPA Identity Number
MCPAIN
BCF
6.2 MML commands The following MML commands are used to handle the feature: • •
The EFO command is used to output the BCF parameters. The ERO command is used to output the TRX parameters.
6.3 Alarms No new and modified alarms are introduced for this feature.
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User interface
6.4 Measurements and counters Table 5: New counters lists counter introduced with this feature. For more information see ”113 Power Saving Measurement” . Table 5 Counter ID
113009
New counters Counter name
MCPA POWER DOWNTIME DUE TRAFFIC
Measurement
113 Power Measurement
Table 6: Modified counters lists counter modified by this feature. For more information see “113 Power Saving Measurement” . Table 6 Counter ID
113008
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Modified counters Counter name
DTRX POWER DOWNTIME DUE TRAFFIC
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Measurement
113 Power Measurement
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Activating and configuring the feature
RG301936: Intelligent MCPA TRX Shutdown
7 Activating and configuring the feature This chapter provides the procedures to operate the feature “RG301936: Intelligent MCPA TRX shutdown”.
7.1 Activating the Intelligent MCPA TRX shutdown Before you start •
To operate the feature, the license for the feature “RG301936: Intelligent MCPA TRX shutdown” must be installed.
•
The feature “BSS20984: 2G TRX Automatic Power Down” feature must be activated. The Flexi Multiradio licence must be installed and enabled. The BSC must be of S16.1 or greater release and the BTS must be of Flexi Multiradio BTS with EX 5.1 or greater release, Flexi Multiradio 10 with BTS GF1 1.0.0 or greater release, Flexi Compact BTS with GFC1 1.0.0 or greater release.
• •
Procedure
1
Change the value of the 2G TRX Automatic Power Down feature state to ON using the command W7M ZW7M:FEA=1236:ON;
2
Change the value of the Intelligent MCPA TRX shutdown feature state to ON using the command W7M ZW7M:FEA=4438:ON;
3
Check that the feature state was changed successfully using the command W7I ZW7I:FEA,FULL:FEA=4438;
End Verifying The feature activation is verified by checking the value of parameter “2G TRX Power Down Threshold”. If the value of the parameter “2G TRX Power Down Threshold” is non zero and the license of the feature “RG301936: Intelligent MCPA TRX shutdown” and “BSS20984: 2G TRX Automatic Power Down” is enabled, then the feature is activated successfully. To verify the activation of this feature you must have a minimum of two MCPAs configured in a segment. Follow the steps to verify that this feature has been activated successfully.
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Activating and configuring the feature
Check that the licence for 2G TRX Automatic Power Down feature has been installed (W7I) ZW7I:FEA,FULL:FEA=1236,;
2.
Check that the licence for Intelligent MCPA TRX shutdown feature has been installed((W7I) ZW7I:FEA,FULL:FEA=4438;
3.
Modify the Power Saving measurement (TPM). ZTPM:MEASUR,POWER_SAV:,,
