procel’ -...
Post on 18-Sep-2020
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PROCEL
Smart Traffic Handling for a Scalable So4ware Evolved Packet Core (EPC)
Kanthi Nagaraj, Sachin Ka5 Stanford University
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Control messages Data messages
Internet
Mobility Manager
Subscriber Database
Control plane
Serving Gateway
Packet Gateway
Data plane Radio Access Network
2. AuthenMcaMon
5. Modify bearer request
8.Modify bearer response
6. Update Bearer
7. Update Bearer response
9. Create Bearer request
Who is bothered ?
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Control messages Data messages
Internet
Mobility Manager
Subscriber Database
Control plane
Serving Gateway
Packet Gateway
Data plane Radio Access Network
6. Update Bearer
7. Update Bearer response
Signaling is growing 2.5X data traffic : Scaling problem for operators
• Centralized data plane: Architecture inflexible for easy introducMon of in-‐network services
• Core network elements have per-‐bearer state
Centralized data plane: Increased data plane latency for users
DisproporMonate work by network
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Control messages Data messages
Internet
Mobility Manager
Subscriber Database
Control plane
Serving Gateway
Packet Gateway
Data plane Radio Access Network
In general, in LTE network, there is a mismatch between network resource consumpMon and the
amount of data transported
• Rate of control signaling • Centralized data plane • State maintenance
Resource allocaMon in the core network must be according to the requirements of the flow and the
value of the flow to the user/operator.
Two simple principles 1. Classify flows 2. Allocate resources according to the classificaMon
Procel -‐ Vision
Internet
Mobility Manager
Subscriber Database
Control plane
Serving Gateway
Packet Gateway
Data plane
Radio Access Network
Procel Operator service cloud
Procel Controller
Backhaul Offloaded to IP network
Datapath to core network
Control path to core network
PROCEL Research issues
• Flow classificaMon techniques • Granularity of Procel switch placement. • Procel controller design
Thank you !
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