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Active Content Networking(ACN)
Active Content Networking (ACN) uses capsules for network control and service setup that are processed only at edge nodes, while content is transported via normal IP. This allows on-the-fly setup of content services with minimal interference to data traffic. The ACN edge node processes capsules to configure the network and duplicate content for multiple receivers. ACN integrates technologies for signaling, transport, and feedback while enabling content services through capsule-based communication with the network.
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Active Content Networking(ACN)
- 1. AAccttiivvee CCoonntteenntt NNeettwwoorrkkiinngg ((AACCNN)) Tal Lavian
- 2. Goals ActiveNetworks in Content Networking Capsules used for service setup and network control Content transport using normal IP protocols CO2 EE processes capsules for Service setup and network configuration Content duplication for multi-receivers Receive registration Duplicate a content copy to each receiver Active Content Networking Slide: 2
- 3. What’s distinguished? ACN vs RSVP and multicast RSVP/Multicast: Requiring support on each router/switch ACN: only at edge route/switch, service-enabling ACN vs RTP and RTCP RTP/RTCP: communication btw senders and receivers ACN: communication also with network ACN vs Active Networks (AN) AN: capsules for network control and data transport, processing at every active node ACN: capsules only for network control, and only processing at a few edge nodes Active Content Networking Slide: 3
- 4. ACN Edge Node Services Control Plane Control Net Active Content Networking Slide: 4 CCooddee PPoolliiccyy MMaannaaggeemmeenntt CCoonnttrrooll PPllaannee DDaattaa TTrraannssppoorrtt NNooddee CCoommppoonneennttss Code Policy Data transport Edge Device Network Management CO2 Services iSD NNooddee SSttrruuccttuurree
- 5. ACN and theInternet Active Content Networking Slide: 5 CO2 Edge iSD CO2 Distribution Plane CO2 LH iSD CO2 Edge iSD Policy Code CO2 Metro iSD NetMgr Optical Core AcAccecsesss Metro Long Haul Access Capsule flow (control) Content flow (data) Service code policy Network config/monitor Content Clients Content Server
- 6. Issues CO2Distribution Plane Capsule-based Control flow Content Data flow Control and Data flows: in- or off-band Benefits Shortcomings Active Content Networking Slide: 6
- 7. CO2 Distribution Plane CO2 nodes Locate at the network edges where necessary Types: Edge, Metro, LH CO2-Edge processes capsules, and Decides service setup and network configuration Instructs CO2-Metro/-LH to establish optical connections Code Policy Code: capsule processors and network services Policy: service and network constraints NetMgr Service control and network management Active Content Networking Slide: 7
- 8. Capsule-based Control Flow Capsule: ANEP-based active packets Purposes: Active Content Networking Slide: 8 User signaling Content service setup: enabling/disabling, etc Network configuration: bandwidth, routes Feedbacks btw senders and receivers Service requests and grants/permission Traffic statistics, and QoS Processing at CO2-Edge Downloading processor code
- 9. Content Data Flow Based on normal IP protocols Like UDP/RTP No capsule is required Content Duplication by CO2-Edge When more than one receiver exists Why? Traffic congestion is most often here! Active Content Networking Slide: 9
- 10. Content Control andData Flows One connection: in-band Under same UDP encapsulation Resource saving Capsule and Data have different payloads But complex payload processing But data transport may have to wait Two connections: off-band One for capsule and one for data Separated communications Network can be set up before data traffic starts Active Content Networking Slide: 10
- 11. Benefits Easycontent service setup “On-the-fly” by capsules Based on CO2 Fewer capsules and their processing At CO2 edge node only Little interference with data path Technology integration Network signaling, like RSVP Data transport, like RTP Traffic feedback, like RTCP Content duplication, like multicast Active Content Networking Slide: 11
- 12. Shortcomings Specifichardware support Capsule redirection Content filtering Content duplicating Inter-node CO2 communication Active Content Networking Slide: 12