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Self-organize: *Self-configuration - 'plug-and-play' paradigm - new base stations shall automatically be configured and integrated into the network - both connectivity establishment, and download of configuration parameters and software. *Self-optimization – BS parameters can be regularly adjusted, based on both base station and mobile station observations. - establishes neighbor relations (ANR) automatically*Self-healing - When some nodes becomes inoperative, self-healing mechanisms aims at reducing the impacts from the failure - by adjusting parameters and algorithms in adjacent cells so that other nodes can support the users that were supported by the failing node
Content centric networking
Content Centric NetworkingSOK PhearinMBC Laboratory,Konkuk University, Seoul
Content Overview of CCN CCN Architecture CCN Operation References
Content Centric Networking A new approach to networking that enables networks to self-organize and push relevant content where needed at anywhere, anytime, and with any devices makes the name and attributes of content the principle objects upon which the network acts Focus on dissemination of information, not on the maintenance of network connections
Content Centric Networking Confidentiality, Availability, and Integrity (CIA) of data CCN stores mappings between names and data items Data replication and movement throughout the CCN to increase efficiency and provide resiliency to network failures and attacks
CCN Architecture: Packets Interest Data Content Name Content Name Signature Selector (digest algorithm, witness, ...) (order preference, publisher Signed Info filter, scope, ...) (publisher ID, key locator, stale time, ...) Nonce Data There are just two CCN packet types - interest (similar to http “get”) and data (similar to http response). Both are encoded in an efficient binary XML.
CCN Architecture: Node Model Face 1 Content Store Wireless Face 2 Pending Interest Table (PIT) CCN Forwarding Wired Logic Face 3 Forwarding Information Application Base (FIB) CCN Forwarding EngineEach CCN entity has 3 main data structures Content Store, Pending Interest Table, Forwarding Information BaseUses multicast/broadcastUses “longest prefix matching” lookup for content names
CCN Architecture: Interest Processing Start Receive an Interest Exist in Content Send data through the arrival face yes Store? No Exist in Update PIT if request came from PIT? yes different Face No Exist in Send interest over the Faces in FIB FIB? entry except the arrived Face yes No Insert to PIT Stop
CCN Operation Content goes only where there’s interest. It takes at most one trip across any link. Average latency is minimized. Total bandwidth is minimized. There’s no routing or control traffic associated with the replicas.