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TRANSCRIPT
Heavy Reading’s ViewThe Mobile Cloud Services Core
for 4G and 5G NetworksPrepared for Cisco Knowledge Network by
Gabriel Brown, Senior Analyst, Heavy ReadingApril 26, 2016
• Business Context• Architecture Evolution• Distributed Cloud and Distributed EPC• Towards 5G
Agenda
Mobile Packet Core Technology Cycle
5GUltra low-‐latencyMission criticalMassive scale
Separate bearer & control; Cloud-‐hosted;Dynamic; Automated
GPRS 3G/HSPA
4G EPC; All-‐IP;
Flat Architecture; 2000
2005 2010
2015 2020
4G + Cloud
Business Model Evolution
Integrated Virtualized Services
Self-ServiceNetwork
Today’s state-of-the-artMultiple VNFs to create service
Dynamic NetworkUser requests automatically implemented in network
On-demand Services Network customized, on-the-fly for multiple use-cases
Increasing technical & commercial sophistication
VNFs
Network-as-a-Service
• Distributed processing, centralized control• Services (VNFs in this case) abstracted from
infrastructure• User portals that allow customers to purchase and
configure network services • Make networking as easy to consume as cloud services
Applying Cloud Principles to Mobile Core
"If you look at the cellular core, you again find back offices full of exorbitantly expensive equipment that’s typically quite brittle.”Jennifer Rexford, Computer Scientist, Princeton (renowned for SDN research)
Architecture Evolution
• Opportunity to abstract & disaggregate functions
Mobile Network is Control Plane Centric
HSS
MME PCRF
Cell AggregationNetwork
BackhaulNetwork S-‐GW P-‐GWeNB
ServingGateway
PacketGateway
LTE Control Plane
LTE Data Plane
OperatorBased Services
InterneteNodeB
PDN: Packet Data Network
SGiNetworkServices(SGi-‐LAN)
• “Split Gateway” approach in 3GPP (TR 23.714)• In real-‐world deployment, there is an opportunity to simplify• Simple “User-‐Plane Nodes” and “Mobility Controllers” could emerge
3GPP Control / User Plane Separation (“CUPS”)
Source: 3GPP TR 23.714
Architecture & Deployment
RAN
Edge
Core Control Plane
Control Plane
User PlaneUser Plane
Classic EPC
SGi-‐LAN SGi-‐LAN SGi-‐LAN
SGi-‐LAN SGi-‐LAN
• Multiple options to steer user traffic into a core network processing path– APNs – Used for VoLTE and
enterprises services today– MoCN – Used for networks
sharing and MVNOs– DECOR– Ref TR 23.707; likely
to be used initially for IoT– Service Chaining – Using packet
headers; e.g. NSH
“Network Slicing” for EPCA.K.A. Packet Core Network Selection
S-‐GW P-‐GW SGiSGi-‐LANServices
S-‐GW P-‐GW SGiSGi-‐LANServices
SGi-‐LANServicesSGi
– Virtualization enables multi-‐tenant and single-‐tenant core networks– “Slices” configured according to service type & traffic profile
P-‐GWS-‐GW
Distributed EPC Deployment
Why Distribute?
Source: Verizon
"In 5G the concept of the edge has to change;; that's something we're very focused on." Adam Koeppe, VP Network Technology & Planning, Verizon
Distributed Cloud for MNOs
MEC M-‐CORD C-‐RAN
• Operators need one-‐hop access to the cloud• Multiple efforts to define “edge cloud” environments• Deployment at the aggregation layer, C-‐RAN hub, etc.
Distributed Architecture
SessionHandling
MME/SGW
AAA PCRF OxCS
Controller
NBI
SBI
Remote DC
User Plane
Remote DC
User Plane
Remote DC
User Plane
SAE-‐GW Controller
IP Transport / Internet
Control Plane
User Plane
• Virtualized on x86 servers• Router termination of GTP• GTP-‐enabled white-‐box switches
Distributed User-‐Plane Node
High Performance Data Path
Counters Flows Tables
SDN Client
Flow Classifier
GTP-‐U
SBI
IPGTPS1U
SGi
Session Anchor
GTP IPHigh Performance Fast Path Forwarding
User Plane Node with Integrated SGi-‐LAN Services
VNF
VNF
VNF
VNF
VNF
VNF
VNF
VNF
VNF
VNF
VNF
VNF
Towards 5G
5G Core Development
5G#CoreClassifiers
5G#RATs
eLTE
LTE#Core
Legacy#RATLegacy#Core
Fixed
BRAS#AN
IoT#HetNet
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S ig na l@S tr en g th
IMS
MaaS for Enterprise
Internet
IoT LPWA
MaaS for Company ABC
IoT Connected Car
Policy#Server
Data-base
Content Centric Network
• Network Slicing: Multiple logical networks as virtually independent business operations on common infrastructure
• All connections are steered into their correct slices based on policy layer
• Slices can be service chains equipped with service functions particular to the slice definition
• SA2 Architecture standards work underway in 3GPP
Mobile Cloud Service Core White Paper
@gabeuk
Big Communications EventAustin, May 24-‐25
http://www.lightreading.com/lg_redirect.asp?piddl_lgid_docid=722051
