The LTE3199: Support for Multiple MBSFN and Synchronization Areas feature benefits the operator as follows:
• The operator can provision up to eight MBSFNs per cell, without any radio resource overlap.
• The operator can provision up to six MBMS synchronization areas, on a single carrier, per Multi-cell/Multicast Coordinating Entity (MCE).
g
Note: The maximum number of MBSFNSYNCAREA instances depends on the eNB hardware.• The operator can use all, or a subset of, frequencies supported by the eNB to provide eMBMS sessions.
3.11.2 LTE3199 functional description
Overview
Under LTE1117, the eNB manages a single frequency layer with one MBSFN area only.
The LTE3199: Support for Multiple MBSFN and Synchronization Areas feature enhances that capability with the ability to provision multiple MBSFN SYNC areas. Each MBSFN SYNC area will correspond to a carrier. A cell may have the capability to support multiple MBSFN areas.
The feature can be enabled in one eNB on cells working on different carrier frequencies.
Up to eight non-overlapping MBSFN areas can be configured per cell. A maximum MBSFN subframe allocation per MBSFN area, and a total per synchronization area, is configurable via O&M setting. Up to six eMBMS synchronization areas can be configured on each eNB. A cell on a given frequency layer can belong to only one MBSFN
synchronization area.
The LTE3199: Support for Multiple MBSFN and Synchronization Areas feature also enables warning operators if there are resource constraints, and if MBMS sessions cannot be started.
g
Note: In the LTE3199: Support for Multiple MBSFN and Synchronization Areas feature, MBSFN resources can not be overlapped, thus the subframe configuration for those MBSFNs should ensure that the resources do not overlap. The MBSFN overlap capability is introduced with LTE3552.Specifically, the LTE3199: Support for Multiple MBSFN and Synchronization Areas feature brings the following enhancements:
• Eight MBSFN areas per cell
• Up to six MBSFN SYNC Areas per MCE/eNB allowing multiple carrier support
• The maximum subframe allocation per MBSFN and per SYNC area can be configured
• Ability to configure multiple MBSFNs with non-overlapping MBSFN subframes
• Advertising of the MBSFN neighbor configuration in SIB3 and SIB5
• New alarms when sessions cannot be started due to resource constraints
• Sessions are not started or suspended due to resource constraints
The feature can be enabled or disabled per eNB using O&M settings. It shares a common feature activation flag with LTE1117.
Limitations
For the LTE17 release, this feature will only be usable in laboratory conditions and is not suitable for field deployment.
The following functionalities are not supported in LTE17:
• Multiple MBSFN areas
• Multiple MBSFN Sync areas
The following restriction is added in the LTE17 release:
• Dynamic change of the Object Model (NIDD/PDDB) parameters is not supported in the xL17.
As a work around, the customer can restart the eMBMS service (FR flag set to OFF/ON) to apply any changes made to the parameters. In such a case, eNB reset is not required and eNB cells stay online.
Other feature limitations:
• LTE3199 does not support any carrier bandwidth lower than 10 MHz
• No support for preemption of MBMS bearers using Address Resolution Protocol (ARP)
• MBMS service counting not supported
• MBSFN Area Reserved cell is not supported
• QCI-65/66 not supported as MBMS bearers
• MBSFN Area reserved cell which does not perform MBSFN transmission is not supported
• Multiple eMBMS radio bearers (in different MBSFN Areas) for the same session, as identified by a unique TMGI, are not supported in the single cell; this functionality is added by LTE3552
g
Note: It is recommended to modify the M1SYNC MOC parameters only if there are no active MBMS sessions.The following legacy eMBMS LTE1117 functionalities remain in LTE17:
• Supported:
– Single MBSFN area – Single MBSFN Sync area
• Modified:
– Session suspension
– Absolute time based admission control – Admission control related alarms
LTE4: RAN Sharing, LTE125 and LTE2299: IPv6 for U/C-plane can be enabled along with LTE3199 and LTE2807.
3.11.3 LTE3199 system impact
LTE3199: Support for Multiple MBSFN and Synchronization Areas impact on features, interfaces, network management tools, and system performance and capacity
Interdependencies between features
The following features must be activated before activating the LTE3199: Support for Multiple MBSFN and Synchronization Areas feature:
• LTE1117: LTE MBMS
– The MCE shall perform admission control and session allocation before the time of MBMS data, and not on arrival. If the time is in the past, the session shall be started immediately based on the sorted order of time of the MBMS data.
– The MCE shall keep the session suspended when a session cannot be admitted due to resource constraints. The session resumes when possible.
– The MCE shall not send Partial RESET if there is an admission control failure since sessions are kept suspended and resumed.
• LTE891: Timing over Packet with Phase Synchronization
• LTE80: GPS Synchronisation
The LTE3199 feature depends on SYNC-btsSyncMode to be set to PhaseSync to provide over-the-air frame synchronization across all the cells of the eNB supporting the eMBMS using Global Positioning System (GPS) or Timing over Packet (ToP).
The LTE3199: Support for Multiple MBSFN and Synchronization Areas feature may be enabled in parallel with the following features:
• LTE2085: SIB Reception with Parallel Measurement Gaps
• LTE1103: Load-based Power Savings for Multi-layer Networks
• LTE1203: Load-based Power Saving with Tx Path Switching Off
A cell configured to support MBMS can participate in load-based reduced energy
• LTE3201: eMBMS in RAN-sharing Deployment Support
The LTE3199 feature should be able to receive session start/stop messages from
• LTE1834: LTE MBMS Service Continuity
The LTE3199 feature leverages the capabilities offered by LTE1834 on MBMS carriers to move the UEs to the corresponding carriers to ensure MBMS service continuity. When actMBMS is deactivated, the contents of mbms-SAIIntraFreq-r11 IE in SIB15 is updated only with the SAIs provisioned for intra-frequency neighbor cells (if configured). The LTE1834 feature is not a prerequisite for the LTE3199 feature.
• LTE2299: Dual Stack IPv4/IPv6 for S1/X2
The LTE2299 feature has to be enabled along with the actMBMS feature flag to be able to use IPv6 capability.
• LTE2807: IPv6 Support for M1 & M3 Interfaces
LTE2807 has to be enabled along with the actMBMS feature flag to benefit from the IPv6 capability
• LTE3056: GPS and UTC Time Information Broadcast Support (SIB16)
The SIB16 will enable UEs to receive accurate timing information for time display, and for other purposes, besides eMBMS service announcements. It is preferred to have cells that broadcast both MBMS and SIB16. This feature is needed for DASH players on the UE. Operators have to ensure SIB16 is broadcasted in cells which broadcast eMBMS. There are no consistency checks added to ensure this behavior.
The LTE3199: Support for Multiple MBSFN and Synchronization Areas feature affects the following features:
• LTE1891: eNB Power Saving – Micro DTX
The support of ON/OFF switching per OFDM symbol to reduce power consumption cannot be applied during MBMS subframe transmission. This feature cannot be enabled along with the LTE3199 feature in FDD.
• LTE48: Support of High-speed Users
This feature cannot be enabled along with the actMBMS feature.
• LTE1496: eICIC-micro
• LTE1113: eICIC-macro
With the LTE3199 feature, LTE1113 must remain deactivated as a precondition for feature activation.
• LTE1382: Cell Resource Groups
With the LTE3199 feature, configuring specific PLMNs is allowed, however from the MBSFN perspective, these are considered fully pooled resources. MBSFN
subframes will be available to all the configured PLMNs. It is recommended to keep LTE1382 deactivated when MBMS is enabled since it is highly complex to configure different percentages within the MBSFN resources.
Impact on interfaces
The LTE3199: Support for Multiple MBSFN and Synchronization Areas feature impacts interfaces as follows:
• RRC interface
– NeighCellConfig updates to SIB5 – SIB13 to include multiple MBSFN areas
– Multiple MCCH support increase in number of PMCH in MBSFNAreaConfiguration
Impact on network management tools
The LTE3199: Support for Multiple MBSFN and Synchronization Areas feature has no impact on network management tools.
Impact on system performance and capacity
The LTE3199: Support for Multiple MBSFN and Synchronization Areas feature impacts system performance and capacity as follows:
• Throughput
eMBMS multicarrier deployment enables the eNB to support multiple MBSFN areas and eMBMS on multiple carriers.
• Quality
eMBMS multicarrier deployment feature does warrant new quality requirements, since the tagging of the existing eMBMS User Data Transmission Success Rate requirement is not applicable to customer eMBMS packet loss KPIs.
3.11.4 LTE3199 reference data
LTE3199: Support for Multiple MBSFN and Synchronization Areas requirements, alarms and faults, commands, measurements and counters, KPIs, parameters, and sales information
Requirements
Table 46 LTE3199 hardware and software requirements System Multiradio 10
BTS
Nokia AirScale BTS
Flexi Zone Micro BTS
Flexi Zone Access Point
FDD-LTE 17 not supported SBTS17A FL17 FL17 FL17A
Flexi Zone Controller
OMS UE NetAct MME SAE GW
not supported support not required
Table 47 Existing alarms related to LTE3199
Alarm ID Alarm name
7651 BASE STATION OPERATION DEGRADED 7652 BASE STATION NOTIFICATION
BTS faults and reported alarms
Table 48 New BTS faults introduced by LTE3199 Fault
ID
Fault name Reported alarms
Alarm ID
Alarm name
6856 MBMS session admission failure - not enough resources
7652 BASE STATION NOTIFICATION
6857 MBMS session admission -partial admission only
7652 BASE STATION NOTIFICATION
Commands
There are no commands related to the LTE3199: Support for Multiple MBSFN and Synchronization Areas feature.
Measurements and counters
There are no measurements or counters related to the LTE3199: Support for Multiple MBSFN and Synchronization Areas feature.
Key performance indicators
There are no key performance indicators related to the LTE3199: Support for Multiple MBSFN and Synchronization Areas feature.
Parameters
Table 49 New parameters introduced by LTE3199
Full name Abbreviated name Managed object
Parent structure
M3 Time Reference m3TimeRef LNMCE
M1 Time Reference m1TimeRef M1SYNC
MBMS Sync Time Offset mbmsSyncTimeOffse t
MBSFN Starting Subframe mbsfnStartingSF MBSFN _FDD MBSFN Sync Area In Use syncAreaInUse MBSFNC
EL MBSFN Area In Use List mbsfnAreaInUseLis
t
MBSFNC EL MBSFN Hidden List mbsfnHiddenList MBSFNC
EL
MBSFN Sync Area Id syncAreaId MBSFNS
YNCARE A MBSFN Overlapping Allowed mbsfnOverlapAllow
ed MBSFN sync area identifier mbsfnSyncArea_Fdd
Id
MBSFNS YNCARE A_FDD
Table 50 Parameters modified by LTE3199
Full name Abbreviated name Managed object
Parent structure
MBMS SYNC Period mbmsSyncPeriod M1SYNC
Table 50 Parameters modified by LTE3199 (Cont.)
Full name Abbreviated name Managed object
Parent structure
MBMS SYNC Reference mbmsSyncRef M1SYNC
Integral Seconds integralSecs M1SYNC mbmsSyncRef
Fractional Seconds fractionalSecs M1SYNC mbmsSyncRef Maximum MBSFN subframe
pattern share
maxSubfrPShare MBSFN _FDD MBMS Service Area list mbmsSaiList MBSFN
Table 51 Existing parameters related to LTE 3199
Full name Abbreviated name Managed object
Parent structure
EARFCN Downlink earfcnDL LNCEL
_FDD Downlink channel bandwidth dlChBw LNCEL
_FDD
Default paging cycle defPagCyc LNCEL
Modification period coefficient modPeriodCoeff SIB MBMS neighbour cells
configuration
mbmsNeighCellConf igIntraF
SIB
Neighbor cells configuration mbmsNeighCellConf igInterF
IRFIM
MBSFN Area Identity mbsfnAreaId MBSFN
Mobile Country Code mcc MBSFNS
YNCARE A
syncAreaPlmnIdList
Mobile Network Code mnc MBSFNS
YNCARE A
syncAreaPlmnIdList
Mobile Network Code length mncLength MBSFNS YNCARE A
syncAreaPlmnIdList
MBSFN EARFCN mbsfnEarfcn MBSFNS
YNCARE A_FDD MBSFN downlink channel
bandwidth
mbsfnDlChBw MBSFNS YNCARE MBMS Service Area mbmsServiceArea MBSFN
Table 51 Existing parameters related to LTE 3199 (Cont.) Full name Abbreviated name Managed
object
Parent structure
MBMS Service Area Characteristics
servAreaCharacter istics
LNMCE
MBMS Service Area Id servAreaId LNMCE servAreaCharacteristics MBMS Service Area FEC s ervAreaFec LNMCE servAreaCharacteristics MBMS Service Area Maximum
Bit Rate
servAreaMaxBitRat e
LNMCE servAreaCharacteristics
MBMS Service Area Maximum Session Bit Rate
servAreaMaxSessio nBitRate
LNMCE servAreaCharacteristics
MBSFN Sessions Active mbsfnSessionsActi ve
MBSFN mchInfo
MBMS SYNC Period mbmsSyncPeriod MBSFN mchInfo DRX on duration timer drxOnDuratT DRX drxProfile2 DRX Retransmission Timer drxRetransT DRX drxProfile2 DRX on duration timer drxOnDuratT DRX drxProfile3 DRX Retransmission Timer drxRetransT DRX drxProfile3 DRX Retransmission Timer drxRetransT DRX drxProfile4 DRX Retransmission Timer drxRetransT DRX drxProfile5 DRX Retransmission Timer drxRetransT LNCEL drxProfile101 DRX Retransmission Timer drxRetransT LNCEL drxProfile102 DRX Retransmission Timer drxRetransT LNCEL drxProfile103 DRX On Duration Timer drxOnDuratT SDRX drxSmartProfile2 DRX Retransmission Timer drxRetransT SDRX drxSmartProfile2 DRX On Duration Timer drxOnDuratT SDRX drxSmartProfile3 DRX Retransmission Timer drxRetransT SDRX drxSmartProfile3 DRX Retransmission Timer drxRetransT SDRX drxSmartProfile4 DRX Retransmission Timer drxRetransT SDRX drxSmartProfile5 MBMS single frequency network
identifier
mbsfnId MBSFN
MBSFN Sync Area identifier mbsfnSyncAreaId MBSFNS YNCARE A_FDD MBSFN Cell identifier mbsfnCelId MBSFNC
EL
M1 Sync identifier m1SyncId M1SYNC
Activate support for MBMS actMBMS LNBTS
Table 51 Existing parameters related to LTE 3199 (Cont.) Full name Abbreviated name Managed
object
Parent structure
EARFCN for both Downlink and Uplink (TDD)
earfcn LNCEL
DRX Retransmission Timer (Profile 2)
drxRetransT DRX drxProfile2
DRX Retransmission Timer (Profile 3)
drxRetransT DRX drxProfile3
DRX On Duration Timer drxOnDuratT 1 LNCEL drxProfile10 DRX Retransmission Timer
(Profile 101)
drxRetransT LNCEL drxProfile101
DRX Retransmission Timer (Profile 102)
drxRetransT LNCEL drxProfile102
DRX On Duration Timer drxOnDuratT LNCEL drxProfile103 DRX Retransmission Timer
(Profile 103)
drxRetransT LNCEL drxProfile103
DRX Retransmission Timer (DRX Smart Profile 2)
drxRetransT SDRX drxSmartProfile2
DRX Retransmission Timer (DRX Smart Profile 3)
drxRetransT SDRX drxSmartProfile3
Sales information
Table 52 LTE3199 sales information
Product structure class License control Activated by default Application software (ASW) Pool license No