01_5G基础知识1
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— SCG (Secondary Cell Group)
— For a UE configured with DC, the subset of serving cells not part of the MCG, i.e. comprising of the PSCell and zero or more other secondary cells
— SCell (Secondary Cell)
— A cell, operating on a secondary frequency, which may be configured once an RRC connection is established and which may be used to provide additional radio resources
LTE
Option 3 E-UTRA-NR DC (EN-DC)
2019-4 | | Page 11
NR
LTE
Option 7 NG-RAN E-UTRA-NR DC (NGEN-DC)
NR
Option 4 NR-E-UTRA DC (NE-DC)
What is Dual Connectivity?
— Spectrum
— Bandwidth availability limits Operator flexibility
— Ecosystem
— Device & 5GCN availability influences possible paths
Option 1
EPC
Option 2
5GCN
— MCG (Master Cell Group)
— For a UE not configured with DC, the MCG comprises all serving cells. For a UE configured with DC, the MCG concerns a subset of the serving cells comprising of the PCell and zero or more secondary cells
❖ 基于新的5G核心网 5GC的网络部署选项组： ▪ 选项2：完全的5G的系统，也成为SA网络 ▪ 选项4：NR小区作为主小区MCG cell，LTE小区作为辅小区 SCG cell的网络部署，又称为：NE-DC ▪ 选项7：LTE小区作为主小区MCG cell， NR小区作为辅小区 SCG小区的网络部署。又称为：NGEN-DC ▪ 选项5：只有LTE能力的UE接入5GC网络下的LTE小区
2019-4 | | Page 10
X2’
LTE
NR
• S1’-C always to LTE eNB • S1’-U terminates on NR gNB • NR gNB decides if UP traffic is routed via NR
gNB and/or LTE eNB (split bearer in NR gNB)
3gpp 网络可选项
— Multiple connectivity scenarios (Options), initially proposed for discussions on 3GPP
— Some of them with different flavors
— e.g: Option 3 ->3,3a,3x; Option 4 -> 4,4x
RAN
Control plane over
LTE
Data switch/agg.
LTE/NR
Tight interworking with LTE Evolved CN Fastest TTM
Completion: 12.2017 / ASN.1 freeze 03.2018
2019-4 | | Page 7
Human Machine Interaction
Sensor Networks
2019-4 | | Page 3
Critical Control of Remote Devices
Critical Services and Infrastructure Control
5G 主要场景
LOW COST, LOW ENERGY SMALL DATA VOLUMES MASSIVE NUMBERS
— For Dual Connectivity operation the term Special Cell refers to the PCell of the MCG or the PSCell of the SCG, otherwise the term Special Cell refers to the PCell
• S1’-C always to LTE eNB • LTE eNB decides if a bearer is routed
to LTE eNB or NR gNB (bearer switching in SGW)
Note: high-level definition of option 3 variants for data service (indicative only)
5G 技术需求
2019-4 | | Page 5
目录
5G的应用 5G无线网络结构 5G 物理层基本知识 Massive MIMO的基本知识 NSA 网络基本知识
2019-4 | | Page 6
5G 网络结构
NSA
(RAN split LTE anchor)
5G EPC (vEPC)
SA
5G GC (NGCN)
RAN
Data Ctrl
Control plane over
NR
Data switch/agg.
LTE/NR
“Independent” overlay Totally new CN architecture Highest performance potential
Completion: 06.2018 / ASN.1 freeze 09.2018
MeNB
SCG Secondary
Cell Group
SCG PSCell [Carrier 3]
SeNB
SCG Scell [Carrier 4]
MCG SCell [Carrier 2] MCG PCell [Carrier 1]
Dual connectivity first introduced for LTE in 3GPP rel12/13.
Option 3x
EPC
Option 4
5GCN
Option 5
5GCN
Option 7
5GCN
eNB 2019-4 | | Page 8
eNB
gNB
eNB
gNB
gNB
eNB
eNB
gNB
3GPP的可选网络选项
根据核心网的不同可以分为以下两个选项组：
❖ 基于5G能力的5G-EPC的网络部署选项组
▪ 选项-3，具有NR能力的UE接入5G-EPC网络。在选项3中，LTE作为主小区MCG cell，提供控制面数据的处理， 用户面数据可以由LTE小区或NR小区提供，或者LTE和NR小区同时提供。选项3就是我们所说的NSA的网络部 署，或者叫EN-DC网络
MCG Master Cell Group SCG Secondary Cell Group
5G UE-RAN-CN DC options
3GPP TR 38.801 & 23.799 3GPP TS 37.340
Multi-RAT Dual Connectivity (MR-DC)
5G EPC
— Option 6 & 8 have been from the start “discarded”
— Due to needed 5GC preferred migration
— Migration to 5G highlights different “issues”
— Use cases
— Multitude of use cases drives different connectivity options
— PSCell (Primary Secondary Cell)
— The SCG cell in which the UE is instructed to perform random access when performing the SCG change procedure
— SpCell (Special Cell)
5G 基本知识
目录
5G的应用 5G无线网络结构 5G 物理层基本知识 Massive MIMO的基本知识 NSA 网络基本知识
2019-4 | | Page 2
5G Use Cases
Broadband and Media Everywhere
Smart Vehicles and Transport
DC between LTE & NR
5GC
3GPP target Q4 ’17
3GPP target Q2 ’18
S1-based
N2/N3 (new interface)
Option 1
Option 3 EN-DC
Option 5 Option 7 NGEN-DC
Option 2
Option 4 NE-DC
2019-4 | | Page 13
— PCell (Primary Cell)
— The cell, operating on the primary frequency, in which the UE either performs the initial connection establishment procedure or initiates the connection re-establishment procedure, or the cell indicated as the primary cell in the handover procedure
2019-4 | | Page 12
MCG Master Cell Group
Dual Connectivity Definitions
— DC (Dual Connectivity)
— A UE in RRC_CONNECTED is configured with Dual Connectivity when configured with a Master and a Secondary Cell Group
X2’
ห้องสมุดไป่ตู้
LTE
NR
X2’
LTE
NR
• S1’-C always to eNB • S1’-U terminates on eNB • LTE eNB decides if UP traffic is routed via NR
gNB and/or LTE eNB (split bearer in LTE eNB)
2019-4 | | Page 4
Enhanced MBB
Home, Enterprise, Venues, Mobile/Wireless/Fixed
Smart phone
4k/8k UHD, Broadcasting, VR/AR,
Higher data rate
ULTRA RELIABLE VERY LOW LATENCY VERY HIGH AVAILABILITY
3GPP TR 38.801
Option 3
Option 3a
Option 3x
3GPP TS 37.340 MCG Split bearer
MCG bearer or SCG bearer
SCG split bearer
5G EPC MME SGW
5G EPC MME SGW
S1’-U
5G EPC MME SGW
NR Non Stand-Alone
EPC
NR Stand-Alone
OPTI ON 7
5GC
OPTI ON 2
OPTI ON 3 OPTI ON 4
2019-4 | | Page 9
WW
eNB
gNB
LTE
NR
WW W
eNB
gNB
gNB
LTE
NR
NR
5G EPC & NSA NR
from 3GPP TR 38.801 (Options 3/3a/3x) to 3GPP TS 37.340 (EN-DC)
— For a UE configured with DC, the subset of serving cells not part of the MCG, i.e. comprising of the PSCell and zero or more other secondary cells
— SCell (Secondary Cell)
— A cell, operating on a secondary frequency, which may be configured once an RRC connection is established and which may be used to provide additional radio resources
LTE
Option 3 E-UTRA-NR DC (EN-DC)
2019-4 | | Page 11
NR
LTE
Option 7 NG-RAN E-UTRA-NR DC (NGEN-DC)
NR
Option 4 NR-E-UTRA DC (NE-DC)
What is Dual Connectivity?
— Spectrum
— Bandwidth availability limits Operator flexibility
— Ecosystem
— Device & 5GCN availability influences possible paths
Option 1
EPC
Option 2
5GCN
— MCG (Master Cell Group)
— For a UE not configured with DC, the MCG comprises all serving cells. For a UE configured with DC, the MCG concerns a subset of the serving cells comprising of the PCell and zero or more secondary cells
❖ 基于新的5G核心网 5GC的网络部署选项组： ▪ 选项2：完全的5G的系统，也成为SA网络 ▪ 选项4：NR小区作为主小区MCG cell，LTE小区作为辅小区 SCG cell的网络部署，又称为：NE-DC ▪ 选项7：LTE小区作为主小区MCG cell， NR小区作为辅小区 SCG小区的网络部署。又称为：NGEN-DC ▪ 选项5：只有LTE能力的UE接入5GC网络下的LTE小区
2019-4 | | Page 10
X2’
LTE
NR
• S1’-C always to LTE eNB • S1’-U terminates on NR gNB • NR gNB decides if UP traffic is routed via NR
gNB and/or LTE eNB (split bearer in NR gNB)
3gpp 网络可选项
— Multiple connectivity scenarios (Options), initially proposed for discussions on 3GPP
— Some of them with different flavors
— e.g: Option 3 ->3,3a,3x; Option 4 -> 4,4x
RAN
Control plane over
LTE
Data switch/agg.
LTE/NR
Tight interworking with LTE Evolved CN Fastest TTM
Completion: 12.2017 / ASN.1 freeze 03.2018
2019-4 | | Page 7
Human Machine Interaction
Sensor Networks
2019-4 | | Page 3
Critical Control of Remote Devices
Critical Services and Infrastructure Control
5G 主要场景
LOW COST, LOW ENERGY SMALL DATA VOLUMES MASSIVE NUMBERS
— For Dual Connectivity operation the term Special Cell refers to the PCell of the MCG or the PSCell of the SCG, otherwise the term Special Cell refers to the PCell
• S1’-C always to LTE eNB • LTE eNB decides if a bearer is routed
to LTE eNB or NR gNB (bearer switching in SGW)
Note: high-level definition of option 3 variants for data service (indicative only)
5G 技术需求
2019-4 | | Page 5
目录
5G的应用 5G无线网络结构 5G 物理层基本知识 Massive MIMO的基本知识 NSA 网络基本知识
2019-4 | | Page 6
5G 网络结构
NSA
(RAN split LTE anchor)
5G EPC (vEPC)
SA
5G GC (NGCN)
RAN
Data Ctrl
Control plane over
NR
Data switch/agg.
LTE/NR
“Independent” overlay Totally new CN architecture Highest performance potential
Completion: 06.2018 / ASN.1 freeze 09.2018
MeNB
SCG Secondary
Cell Group
SCG PSCell [Carrier 3]
SeNB
SCG Scell [Carrier 4]
MCG SCell [Carrier 2] MCG PCell [Carrier 1]
Dual connectivity first introduced for LTE in 3GPP rel12/13.
Option 3x
EPC
Option 4
5GCN
Option 5
5GCN
Option 7
5GCN
eNB 2019-4 | | Page 8
eNB
gNB
eNB
gNB
gNB
eNB
eNB
gNB
3GPP的可选网络选项
根据核心网的不同可以分为以下两个选项组：
❖ 基于5G能力的5G-EPC的网络部署选项组
▪ 选项-3，具有NR能力的UE接入5G-EPC网络。在选项3中，LTE作为主小区MCG cell，提供控制面数据的处理， 用户面数据可以由LTE小区或NR小区提供，或者LTE和NR小区同时提供。选项3就是我们所说的NSA的网络部 署，或者叫EN-DC网络
MCG Master Cell Group SCG Secondary Cell Group
5G UE-RAN-CN DC options
3GPP TR 38.801 & 23.799 3GPP TS 37.340
Multi-RAT Dual Connectivity (MR-DC)
5G EPC
— Option 6 & 8 have been from the start “discarded”
— Due to needed 5GC preferred migration
— Migration to 5G highlights different “issues”
— Use cases
— Multitude of use cases drives different connectivity options
— PSCell (Primary Secondary Cell)
— The SCG cell in which the UE is instructed to perform random access when performing the SCG change procedure
— SpCell (Special Cell)
5G 基本知识
目录
5G的应用 5G无线网络结构 5G 物理层基本知识 Massive MIMO的基本知识 NSA 网络基本知识
2019-4 | | Page 2
5G Use Cases
Broadband and Media Everywhere
Smart Vehicles and Transport
DC between LTE & NR
5GC
3GPP target Q4 ’17
3GPP target Q2 ’18
S1-based
N2/N3 (new interface)
Option 1
Option 3 EN-DC
Option 5 Option 7 NGEN-DC
Option 2
Option 4 NE-DC
2019-4 | | Page 13
— PCell (Primary Cell)
— The cell, operating on the primary frequency, in which the UE either performs the initial connection establishment procedure or initiates the connection re-establishment procedure, or the cell indicated as the primary cell in the handover procedure
2019-4 | | Page 12
MCG Master Cell Group
Dual Connectivity Definitions
— DC (Dual Connectivity)
— A UE in RRC_CONNECTED is configured with Dual Connectivity when configured with a Master and a Secondary Cell Group
X2’
ห้องสมุดไป่ตู้
LTE
NR
X2’
LTE
NR
• S1’-C always to eNB • S1’-U terminates on eNB • LTE eNB decides if UP traffic is routed via NR
gNB and/or LTE eNB (split bearer in LTE eNB)
2019-4 | | Page 4
Enhanced MBB
Home, Enterprise, Venues, Mobile/Wireless/Fixed
Smart phone
4k/8k UHD, Broadcasting, VR/AR,
Higher data rate
ULTRA RELIABLE VERY LOW LATENCY VERY HIGH AVAILABILITY
3GPP TR 38.801
Option 3
Option 3a
Option 3x
3GPP TS 37.340 MCG Split bearer
MCG bearer or SCG bearer
SCG split bearer
5G EPC MME SGW
5G EPC MME SGW
S1’-U
5G EPC MME SGW
NR Non Stand-Alone
EPC
NR Stand-Alone
OPTI ON 7
5GC
OPTI ON 2
OPTI ON 3 OPTI ON 4
2019-4 | | Page 9
WW
eNB
gNB
LTE
NR
WW W
eNB
gNB
gNB
LTE
NR
NR
5G EPC & NSA NR
from 3GPP TR 38.801 (Options 3/3a/3x) to 3GPP TS 37.340 (EN-DC)