3.8.4 2445 reference data
3.18 LTE2564: Centralized RAN CL16A Release
The LTE2564: Centralized RAN CL16A Release feature extends the LTE2470:
Centralized RAN CL16 Release feature with:
• CRAN operation with 4Tx/2Rx MIMO on downlink (DL).
• Selectable (enable/disable) control over interference rejection combining coordinated cultipoint (IRC CoMP) mode
3.18.1 LTE2564 benefits
The LTE2564: Centralized RAN CL16A Release feature provides the following benefits:
• Possibility to use 4x2 MIMO on DL for better throughput while using CRAN on UL.
• Possibility to enable/disable the CRAN gain for demo and testing purposes, without an eNB restart; as a precondition, the CRAN feature flag actCRAN must be set to true.
3.18.2 LTE2564 functional description
The LTE2564: Centralized RAN CL16A Release feature is the successor of the LTE2470: Centralized RAN CL16 Release feature. The feature enables increasing throughput in DL. A mix of 4Tx per cell and 2Tx per cell is allowed in the same CRAN system.
Additionally, untill the LTE2564: Centralized RAN CL16A Release feature, any change in configuration required a reset of CRAN. The feature ensures a dynamical CRAN gain configuration without the reset. It is possible by option enable/disable of all helper cells so that only a serving cell is considered a baseline (non-CRAN) gain.
Migration from FL16 to FL16A
During migration from FL16 (LTE2470: Centralized RAN CL16 Release) to FL16A (LTE2564: Centralized RAN CL16A Release), the same helper cell association is preserved. This provides identical system functionality as the one in FL16 (LTE2470:
Centralized RAN CL16 Release).
The LTE2564: Centralized RAN CL16A Release feature does not change the general CRAN configuration concept introduced by the LTE2470: Centralized RAN CL16 Release feature and allows only the same chain/loop configuration as the legacy LTE2470: Centralized RAN CL16 Release feature. The LTE2564: Centralized RAN CL16A Release feature supports the same system size of the CRAN system (up to 9 FSMFs) and the same topology as the LTE2470: Centralized RAN CL16 Release feature.
3.18.3 LTE2564 system impact
Interdependencies between features
The following features have to be activated before activating the LTE2564: Centralized RAN CL16A Release feature:
• LTE1710: Sync Hub Direct Forward
• LTE2901: Centralized RAN Supported Configurations CL16 Release
• LTE2883: Application of Diagnostic and Maintenance for Intelligent Network
• In case 4T2R MIMO per cell needs to be configured, the LTE568: DL Adaptive Closed Loop MIMO (4x2) feature must be activated.
g
Note: The LTE2883: Application of Diagnostic and Maintenance for Intelligent Network (ADMIN) feature introduces a web-based tool for eNB diagnostic and maintenance tasks. ADMIN is an embedded eNB tool, and it does not require any additional package installation at the end user's station. The ADMIN tool provides the same possibility of enabling and disabling the CRAN gain as BTS SM or NetAct. With ADMIN, it is possible to have CRAN-related counters updated every other minute (instead of standard 15-minute intervals). ADMIN utilizes an eNB-internal data model; thus, the enabling and disabling of CRAN gain is performed directly by eNB mechanisms. As a result, the whole reconfiguration process takes place much faster.For more information, see
LTE2883: Application of Diagnostic and Maintenance for Intelligent Network feature.
The LTE2564: Centralized RAN CL16A Release feature impacts the following features:
• LTE2291: Support for Carrier Aggregation on CL16A Release The LTE2291 feature utilizes the LTE2564 feature.
The following legacy features are not supported by the LTE2564: Centralized RAN CL16A Release feature:
• LTE1092: Uplink Carrier Aggregation – 2CC
• LTE180: Cell Radius Max 100 km
• LTE2387: Classical LTE(MORAN)–GSM(MOBSS) RF Sharing with One SM per Operator
• LTE2445: Combined Supercell
• LTE2511: Additional FDD-TDD Carrier Aggregation Band Combinations – I
• LTE2516: FRIJ Flexi RRH 4-pipe 1700/2100 160 W
• LTE2528: Extension of Downlink 3CC Carrier Aggregation – II
• LTE2531: FDD Downlink Carrier Aggregation 4CC/5CC
• LTE2576: Integrated GMC & BC Support on Flexi Zone Controller
• LTE2605: 4RX Diversity 20 MHz Optimized Configurations
• LTE2609: Dual Carrier Support LTE1.4 and LTE3
• LTE2629: FDD-LTE Dual Carrier (2x20 MHz) Operation Support on a Single Flexi Zone Micro BTS
• LTE2767: FXEF Flexi RFM 3-pipe 1800 240 W
• LTE2637: Quad Carrier on Single RF Unit
• LTE2650: FRSA Flexi RFM 6-pipe 1450 360 W
• LTE2680: FHEL Flexi RRH 2-pipe 1800 120 W
• LTE2729: FW2FIWA – Flexi Zone G2 Indoor Pico Dual Band BTS (Band AWS &
Band 2)
• LTE2880: Support of Classical WCDMA/LTE RF-sharing on 4Tx/4Rx Remote Radio Head (RRH Rel. 4.3-family)
• LTE2920: Classical WCDMA/LTE-RF Sharing Support for Narrowband LTE (LTE 1.4 and 3 MHz)
• LTE3027: FRPD Flexi RFM 6-pipe 700 240 W
• LTE3092: Support for Dual-Band Indoor/Outdoor FZ BTS (Pre–Rel 13) – Enhanced CSAT for LTE-U
• LTE3093: Support for Dual-Band Indoor/Outdoor FZ BTS (Pre–Rel 13) – UNII-1 Band Support
• All legacy features not supported by the LTE2470: Centralized RAN CL16 Release feature.
Impact on interfaces
The LTE2564: Centralized RAN CL16A Release feature has no impact on interfaces.
Impact on network management tools
The LTE2564: Centralized RAN CL16A Release feature has no impact on network management tools.
Impact on system performance and capacity
The LTE2564: Centralized RAN CL16A Release feature increases throughput and service quality for the UEs on the cell edge regions of the cells from the CoMP set.
3.18.4 LTE2564 reference data
Requirements
Table 76 LTE2564 feature hardware and software requirements Multiradio 10
BTS
Airscale Flexi Zone Micro BTS
Flexi Zone Access Point
FDD-LTE 16A not supported FL16A not supported not supported not supported
Flexi Zone Controller
OMS UE NetAct MME SAE GW
not supported LTE OMS16A 3GPP R8 mandatory
NetAct 16.8 support not required
support not required BTS faults and reported alarms
Table 77 BTS fault related to the LTE2564 feature
Fault ID Fault name Reported alarms
Alarm ID
Alarm name
110014 Optical cable inter-BTS or inter FSP cards too long for CRAN
7651 BASE STATION OPERATION DEGRADED
Measurements and counters
There are no measurements or counters related to the LTE2564: Centralized RAN CL16A Release feature.
Key performance indicators
There are no key performance indicators related to the LTE2564: Centralized RAN CL16A Release feature.
g
Note: No additional performance counters and KPIs are included since the LTE2564 counters and KPIs are reused from the LTE1900/2470 features.Parameters
Table 78 Existing parameters related to the LTE2564 feature Full name Abbreviated name Managed object
Parent structure
Activate Centralized RAN
actCRAN LNBTS
-Activation of inter-frequency load
balancing (iFLB)
actInterFreqLB LNBTS
-CRAN gain configuration cranGain CRAN
-CRAN node identifier cranNodeId CRAN
-CRAN identifier cranId CRAN
-Table 78 Existing parameters related to the LTE2564 feature (Cont.) Full name Abbreviated name Managed
object
Parent structure
Downlink MIMO mode dlMimoMode CRAN
-Resource list resourceList LCELL
-Antenna line id antlId LCELL Resource list
Sub cell identifier subCellId LCELL Resource list TX and RX usage txRxUsage LCELL Resource list
For parameter descriptions, see LTE Radio Access Operating Documentation/
Reference/Parameters.
Sales information
Table 79 The LTE2564 feature sales information
Product structure class License control Activated by default Application software (ASW) Pool license No