SmartEdge: A Computation-Capable and Programmable Wireless Access Network for Content Delivery. Hang Liu

Transcription

1 SmartEdge: A Computation-Capable and Programmable Wireless Access Network for Content Delivery Hang Liu

2 Outline Motivation and Industrial Relevance Project Objectives roach and Previous Results Future Work Outcome and Impact [2]

3 Motivation & Relevance IP networks are designed to provide best-effort forwarding services, but innetwork services are needed. All kinds of proxies, caches, firefalls show the demands. Trend toward integration of communications technologies and information technologies is creating unprecedented opportunities in design of infrastructure for network-centric services. Rapid growth in cloud computing is an example of such integration. SDN is now used for controlling data forwarding, it could incorporate to manage in-network processing. Best place to deploy in-network processing capability is at the edge. Processing power and storage become so cheap. SmartEdge: A Open Programmable Wireless Access Network with In-network Processing capability. Enable mobile service providers and content service providers deploy the in-network services easily. [3]

4 SmartEdge This project aims at developing an Open Programmable Wireless Access Network with in-network processing and storage capabilities to provide unified and efficient transport services to users. Design architecture and protocol to enable manipulation and transportation of data objects, allows the network controller to automatically identify the data objects and invoke appropriate processing and storage methods on the objects within the network while delivering them. Manage and abstract heterogeneous resources (communications, computing, and storage) in the programmable network for unified data processing and delivery at control and orchestration platform. Resource allocation to explore the tradeoff among computation, storage, and communication resources within the network for joint optimization; Open interface for control, virtualization, and third-party access. [4]

5 Open Programmable Wireless Access Network Focused use case: content delivery Control wireless networking: media access protocol, channel, transmission parameters. Content-aware: control in-network processing and caching based on content characteristics and network conditions Wireless Support Network OS Internet HTTY Proxy Catching microcloud MUX In-networking processing and caching [5]

6 SmartEdge for Wireless Video (1) 3GPP DASH content over MBMS + HTTP recovery Multicast video transcoding to adapt to receivers topology change (Coding as a Service) OpenFlow re-routing Local caching Virtualized network for directed multicast for QoS and security via OpenFlow Beacons or Power Save Multi-Poll (PSMP) to reserve downlink TXOP for multicast Software configured multicast parameters (MCS) at soft AP Frequency Channel Selection Multicast Slice Reservation Multicast parameters Network OS Rate Algorithm Channel quality Internet HTTY Proxy Catching microcloud MUX Coding as a Service In-networking processing and caching [6]

7 HTTP recovery from local cache SmartEdge for Wireless Video (2) Frequency Channel Selection Multicast Slice Reservation Multicast parameters Network OS Rate Algorithm Channel quality Internet HTTY Proxy Catching microcloud MUX Coding as a Service In-networking processing and caching [7]

8 SmartEdge for Wireless Video (3) Seamless handoff and media follow you Frequency Channel Selection Multicast Slice Reservation Multicast parameters Network OS Rate Algorithm Channel quality Internet HTTY Proxy Catching microcloud MUX Coding as a Service In-networking processing and caching [8]

9 Manipulatable Package (mpackage). How does the network controller to identify the data objects and invoke appropriate processing and storage methods on them? out- of band signaling In-band signaling. Manipulatable Package (mpackage): contains an annotation header along with data. The annotation header gives the description and metadata of the user data object in the package. Payload mpackage header IP/TCP Header [9]

10 Resource Allocation Network OS Rate Algorithm Channel quality Internet HTTY Proxy Catching microcloud MUX In-networking processing and caching Given N video streams, how to allocate wireless resource and determine optimal transcoding rate for each stream. [10]

11 Resource Allocation Stream i s channel access factor: α i Its quality: Q i α i r i Several scenarios Equal resource: α i = 1/N Max-min: max{min i Q i α i r i } i α i 1 Network OS Rate Algorithm Channel quality Soft AP OF Switch HTTY Proxy Catching OF Switch OF Switch MUX microcloud OF Switch In-networking processing and caching Internet [11]

12 and lication provisioning tool Multicast appls Rate Algorithm Path optimization Network access control Network abstraction and APIs Virtual network creation Agent Global network view Network OS Network runtime state SoftAP OpenFlow Switch Transcoder/ Cache/ Node OpenFlow SoftAP config Transcoder config HTTP proxy/cache config Topology discovery/event collection SoftAP AP virtualization Operation frequency spectrum Transmission parameters, MCS, TX power. Resource allocation Agent VAP 1 VAP 2 VAP 3 SoftAP Physical Interface [12]

13 Outcome and Impact Architecture and protocol design of an Open Programmable Wireless Access Network with in-network processing and storage capabilities. Optimal resource allocation algorithm Prototype software implementation Testbed experimental results SmartEdge provides a platform for wireless network service providers and content service providers to deploy new in-network services. [13]

14 Thanks Q & A [14]