Virtualized Wireless Infrastructure Sachin Katti Assistant Professor EE
- Slides: 13
Virtualized Wireless Infrastructure Sachin Katti Assistant Professor, EE & CS Stanford University
What does it take to…. . Open the wireless infrastructure so users can choose any free spectrum, any network, or many networks, any time? 2
AT&T 3 G Sprint Wi. MAX Any network…. 3
AT&T 3 G Sprint Wi. MAX Many networks…. 4
What does it take to give users choice? 5
Wish List 1. Instantaneous contracts with any physical network, independent of its owner or radio technology 2. A network-independent way to choose a network, and to control mobility 6
Design Choice 1. Establish my own instantaneous contracts and control the network (hard), or 1. Delegate to an entity in the infrastructure – A service provider – My own agent Conceptually the same; we start by delegating 7
Requirement Technical – Radio-independent control layer – A method for a service provider to control my flows on my behalf Business – An incentive for infrastructure owners to open access to service providers 8
“AT&T” Billing, Mobility New Service Network OS “Vodafone” New Service Billing, Mobility New Service Network OS Feature Network OS “Slicing” Layer Open. Flow Switch Open. Flow BS Open. Flow AP
Consequences Radio-independent control layer – Service provider controls user flows – Easy handover between physical networks – Can use several networks simultaneously – Service innovation by service providers A method to share the physical infrastructure – Isolation between service providers – Short-term or long-term lease of rights-of-way 10
AT&T Service Layer: Authentication, Billing, Mobility Management, Routing, … Network Layer: Wireline Network Radio Network: Spectrum, Radios 11
Separating the service from the network Service Layer: Authentication, Billing, Mobility Management, Routing, … Separation/Virtualization Network Layer: Wireline Network Radio Network: Spectrum, Radios 12
Service provider controls a slice across physical networks Service “AT&T” Service Network Separation/Virtualization Network Radio Network: Spectrum, Radios 13