2017.08 LTE Broadcast Poster - enensys.comLTE existing Element MME Mobility Management Unit PGW PDN...
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eMBMS Architecture ENENSYS Technologies | 6 rue de la Carrière | CS 37734 | 35577 CESSON-SÉVIGNÉ Cedex | FRANCE LTE existing Element MME Mobility Management Unit PGW PDN Gateway SGW Serving Gateway eNB E-UTRAN Node B UE User Equipment GCS-AS Group Communication Service Application Server, eg MCPTT New LTE Elements for eMBMS BM-SC Broadcast Multicast Service Center MBMS-GW eMBMS Gateway Distribute IP multicast content to eNodeB over M1 interface (GTP_u). MBMS Session Control Signaling to MME. MCE Multi-cell Coordination Entity Coordinates transmissions from multiple cells. Allocates time and frequency radio resources and radio configuration on all eNodeB in the MBSFN area. MME B MME add-on Convert Sm messages from eMBMS Gateway to M3 messages to MCE Unicast Multicast S1-MME S1-U SGmb SGi SGi-mb S11 S5 SGW MME PGW SGi eMBMS new entities eMBMS User Plane (Data traffic) eMBMS Control Plane (Signaling) eMBMS Service layer & Security Signaling LTE unicast control points & interfaces LTE BROADCAST BM-SC, eMBMS Gateway & MCE Functional Elements MBSFN AREA & SERVICE AREA MBSFN Synchronization Area An area of the network where all eNodeBs can be syn- chronized and perform MBSFN transmissions. MBSFN Synchronization Areas are capable of supporting one or more MBSFN Areas. On a given frequency layer, an eNodeB can only belong to one MBSFN Synchroniza- tion Area. MBSFN Synchronization Areas are independent from the definition of MBMS Service Areas. MBMS Service Area The area within which data of a specific MBMS session (or service) are sent. Each MBMS Session of an MBMS Service may be sent to a different MBMS Service Area. MBSFN Area Consists of a group of cells within an MBSFN Synchro- nization Area of a network, which are co-ordinated to achieve a MBSFN Transmission. A cell within an MBSFN Synchronization Area may form part of multi- ple MBSFN Areas, each characterized by different transmitted content and participating set of cells. MBSFN Area Reserved Cell A cell within a MBSFN Area which does not contribute to the MBSFN Transmission. The cell may be allowed to transmit for other services but at restricted power on the resource allocated for the MBSFN transmission. 2 2 2 1 2 2 2 1 3 3 1 1 1 2+3 2+3 1+2 1+2 1+2 1+2 Service Area (SA) – A Synchronization Area (SY) SA - B SA - C Area 3 Area 1 Area 2 SY Area 4 SY SA - E SA - D SY Area 5 Area 6 Area 7 A+B A+C A A A+D A+D A+E Service Area Synchronization Area Area SYNC MODULE, ENABLING SFN FOR LTE BROADCAST Several eNodeBs are required to pave an MBSFN Area Each eNodeB must send the same content at the same time & frequency. eNodeBs location spread generates multipath reception UE receives signal from several eNodeBs, each signal being delayed with reduced amplitude. Managing Inter-Symbol Interference (ISI) This spread creates ISI. A guard interval is added to the signal: As long as the signals spread is shorter than the guard interval, an ISI-free signal can be reconstructed from these paths. Must synchronize all eNodeBs within a MBSFN Area The synchronization of all eNodeBs guarantees that each MBMS bearer will be ISI free and optimally decoded. SYNC protocol Each MBMS bearer carries SYNC informa- tion to synchronize all eNodeBs within a MBSFN Area to ensure the UE receives constructive signal from these eNodeBs. www.enensys.com/solutions/lte-broadcast SGi Sm SGmb HTTP (FR/RR) eNodeB M1 SGi-mb GATEWAY BM-SC GTP_u encapsulation SYNC Group Comm. FEC Streaming RTP FEC Download FLUTE Transparent WebDAV HTTP User Service Provisioning Service Announcement Session & transmission Reception Reporting File Repair (Forward Session Management to MME) Control Plane eNodeB MBMS GW User Plane MBMS GW BM-SC Protocol stack Uplane Data Uplane Data SYNC SYNC UDP UDP IP IP Protocol stack SYNC SYNC GTP-U GTP-U UDP UDP IP IP Uplane Data Uplane Data MME MBMS GW Protocol stack GTPv2-C GTPv2-C UDP UDP IP IP Protocol stack Diameter Diameter TCP/SCTP TCP/SCTP IP IP MBMS GW BM-SC t Delayed signals seen as echoes Delay spread shorter than GI Guard Interval (GI) FFT window ISI free signal Cyclic Prefix DATA NETWORK Encoder CDN Session Control Signalling PGW MB2-C MB2-U MB2-U MB2-C UE M1 eNB eNB eNB MCE MME B BM-SC MBMS-GW GCS-AS Sm M2 M3 GCS-AS CDN Encoder MME B MCE Session Control eNodeB Config Protocol stack M3AP M3AP SCTP SCTP IP IP M3 Protocol stack M2AP M2AP SCTP SCTP IP IP M2 Session Control (Forward Session Management to MCE) MME MCE MCE eNodeB xMB-U xMB-C Content Provider push/pull Content Provider xMB-U xMB-C
Transcript of 2017.08 LTE Broadcast Poster - enensys.comLTE existing Element MME Mobility Management Unit PGW PDN...
eMBMS Architecture
ENENSYS Technologies | 6 rue de la Carrière | CS 37734 | 35577 CESSON-SÉVIGNÉ Cedex | FRANCE
LTE existing ElementMME Mobility Management UnitPGW PDN GatewaySGW Serving GatewayeNB E-UTRAN Node BUE User EquipmentGCS-AS Group CommunicationService Application Server, eg MCPTT
New LTE Elements for eMBMSBM-SC Broadcast Multicast Service CenterMBMS-GW eMBMS GatewayDistribute IP multicast content to eNodeB over M1 interface (GTP_u). MBMS Session Control Signaling to MME.
MCE Multi-cell Coordination EntityCoordinates transmissions from multiple cells. Allocates time and frequency radio resources and radio configuration on all eNodeB in the MBSFN area.
MME B MME add-onConvert Sm messages from eMBMS Gateway to M3 messages to MCE
UnicastMulticast
S1-MME
S1-U
SGmb
SGi
SGi-mb
S11
S5SGW
MME
PGW
SGi
eMBMS new entitieseMBMS User Plane (Data traffic)eMBMS Control Plane (Signaling)eMBMS Service layer & Security SignalingLTE unicast control points & interfaces
LTE BROADCAST
BM-SC, eMBMS Gateway & MCE Functional Elements
MBSFN AREA & SERVICE AREA
MBSFN Synchronization AreaAn area of the network where all eNodeBs can be syn-chronized and perform MBSFN transmissions. MBSFN Synchronization Areas are capable of supporting one or more MBSFN Areas. On a given frequency layer, an eNodeB can only belong to one MBSFN Synchroniza-tion Area.MBSFN Synchronization Areas are independent from the definition of MBMS Service Areas.
MBMS Service AreaThe area within which data of a specific MBMS session (or service) are sent. Each MBMS Session of an MBMS Service may be sent to a different MBMS Service Area.
MBSFN AreaConsists of a group of cells within an MBSFN Synchro-nization Area of a network, which are co-ordinated to achieve a MBSFN Transmission. A cell within an MBSFN Synchronization Area may form part of multi-ple MBSFN Areas, each characterized by different transmitted content and participating set of cells.
MBSFN Area Reserved CellA cell within a MBSFN Area which does not contribute to the MBSFN Transmission. The cell may be allowed to transmit for other services but at restricted power on the resource allocated for the MBSFN transmission.
2
2
2
1
2
2
2
1
3
3
1 1
1
2+32+3
1+21+2
1+2
1+2
Service Area (SA) – A
Synchronization Area (SY)
SA - B SA - CArea 3
Area 1 Area 2
SY
Area 4
SY SA - ESA - D SY
Area 5 Area 6 Area 7
A+B A+C A A A+D A+D A+E
Service AreaSynchronization AreaArea
SYNC MODULE, ENABLING SFNFOR LTE BROADCAST
Several eNodeBs are required to pave an MBSFN AreaEach eNodeB must send the same content at the same time & frequency.
eNodeBs location spread generates multipath receptionUE receives signal from several eNodeBs, each signal being delayed with reduced amplitude.
Managing Inter-Symbol Interference (ISI)This spread creates ISI. A guard interval is added to the signal: As long as the signals spread is shorter than the guard interval, an ISI-free signal can be reconstructed from these paths.
Must synchronize all eNodeBs within a MBSFN AreaThe synchronization of all eNodeBs guarantees that each MBMS bearer will be ISI free and optimally decoded.
SYNC protocolEach MBMS bearer carries SYNC informa-tion to synchronize all eNodeBs within a MBSFN Area to ensure the UE receives constructive signal from these eNodeBs.
www.enensys.com/solutions/lte-broadcast
SGi
Sm SGmb
HTTP (FR/RR)
eNodeB M1 SGi-mb
GATEWAY BM-SC
GTP_uencapsulation SYNC
Group Comm.
FEC
StreamingRTP
FEC
DownloadFLUTE
Transparent
WebDAV
HTTP
User Service Provisioning
Service Announcement
Session & transmission
Reception Reporting
File Repair
(Forward SessionManagement
to MME)
Control Plane
eNodeB MBMS GW
User Plane
MBMS GW BM-SC
Protocol stack Uplane Data Uplane Data
SYNC SYNC
UDP UDP
IP IP
Protocol stack
SYNC SYNC
GTP-U GTP-U
UDP UDP
IP IP
Uplane Data Uplane Data
MME MBMS GW
Protocol stack
GTPv2-C GTPv2-C
UDP UDP
IP IP
Protocol stack
Diameter Diameter
TCP/SCTP TCP/SCTP
IP IP
MBMS GW BM-SC
t Delayed signals seen as echoes
Delay spread shorter than GI
Guard Interval (GI) FFT window ISI free signal
Cyclic Prefix
DATA NETWORK
Encoder
CDN
SessionControl
Signalling
PGW
MB2-C
MB2-U
MB2-UMB2-C
UE
M1
eNBeNB
eNB
MCE
MME B
BM-SC
MBMS-GW
GCS-AS
SmM2 M3
GCS-AS
CDN
Encoder
MME B
MCE
Session Control
eNodeB Config
Protocol stack
M3AP M3AP
SCTP SCTP
IP IP
M3
Protocol stack
M2AP M2AP
SCTP SCTP
IP IP
M2
Session Control(Forward Session
Managementto MCE)
MME MCE
MCE eNodeB
xMB-UxMB-C
Content Providerpush/pull
Content ProviderxMB-U
xMB-C
