Information Centric Networks and Named Data Networking

Transcription

1 Information Centric Networks and Named Data Networking Dan Massey Colorado State University 1

2 NDN Project Team Van Jacobson: NDN Architect 2

3 The Evolution Toward Information Centric Networks 3

4 Evolution of Network Providers: The Rise of Teleco Companies Architecture focused on building the wires major players deploy and manage wires 4

5 Evolution of Network Providers: ISPs Gain Dominance RFC791: Internet Protocol Specification (1981) Tier 1 Provider Architecture focused on getting packet from source to destination major players deploy and manage infrastructure to connect source to destination 5

6 30 years down the road Interconnections of computers Moore s Law & silicon revolution A new world of applications & computing devices Node2node communication got us to where we are today but the content from services now dominate the marketplace 10/3/2012 Named Data Network 6

7 Evolution of Network Providers: Information Becomes Central Internet Service Providers (ISPs) replaced by Information Service Providers (ISPs) Consumer Prosump.on/ prosumer (ex: twi6er Facebook) Information Related Services Content Distributor Content Distributor Mobile Consumer & Producer Content Distributor Event Architecture focused on information major players will deploy and manage information Producer 10/3/2012 Named Data Network 7

8 What Might Emerge Easy to Envision Evolutionary Changes ISPs => information Service Providers Note CDNs and attempts to avoid being a bit pipe Information Custodians and Redistributors Already exist today But must be very diverse and not location dependent Potential For More Revolutionary Changes Change the underlying architecture Information Centric Networks 10/3/2012 Named Data Network 8

9 What Are Information Centric Networks? 9

10 Communication by Names Applications using names Applications using names Translation Delivering packet by IP addresses Delivering packets by names Producer announces data name e.g. colorado/named-data-talk Consumer sends interest Producer replies with data 10

11 Pre-ICN Data Distribution via Pipes ISP ISP 11

12 It s even worse if one s moving Mobile IP (and other solutions) patch up the problem, but do not eliminate it 12

13 The IPv4 Datagram Format IP protocol version number header length (bytes) type of data max number remaining hops (decremented at each router) upper layer protocol to deliver payload to ver head. len 16-bit identifier time to live type of service upper layer 32 bits flgs length data (variable length, typically a TCP or UDP segment) Internet checksum 32 bit source IP address fragment offset 32 bit destination IP address Options (if any) total datagram length (bytes) for fragmentation/ reassembly E.g. timestamp, record route taken, specify list of routers to visit. Slide Stolen From Kurose and Ross Textbook Lecture Slides 13

14 Resulting IP Packet Forwarding 14

15 NDN Proposes Two Simple Changes 32 bits ver head. len 16-bit identifier time to live type of service upper layer flgs length fragment offset Internet checksum Delete the Source. Named Data Networking does not have sources Replace the Destination. specify the desired content 32 bit source IP address 32 bit destination IP address Options (if any) data (variable length, typically a TCP or UDP segment) 15

16 Resulting NDN Packets Content Name: Identifies the data I want to receive Selector: identifier publisher, etc Nonce Content Name: Identifies the data in this packet Signature: Required for all packets Signed Info: signer, lifetime, etc Nonce Data 16

17 NDN Interest Forwarding get /parc.com/videos/ WidgetA.mpg/v3/s2 /parc.com/videos/widgeta.mpg/v3/s2 0" 2 P data get /parc.com/videos/ WidgetA.mpg/v3/s2 17

18 NDN data retrieval from cache a/b/c/d Producer Consumer a/b/c/d Data Packets say what, not who or where 18

19 NDN data retrieval via multiple paths a/b/c/d Producer Consumer Upstream performance is measurable Forwarding decision is local Facilitate user choice and competition 19

20 Named-Data Networking www phone SMTP HTTP RTP TCP UDP IP IP E Ethernet PPP CSMA async sonet. Copper fiber radio Browser chat File Stream RPC Dynamic Security Named Data Chunks E Strategy IP UDP P2P Bcast. Copper fiber radio Moves the universal component in Internet protocol stack from IP packets to named data 10/3/2012 Named Data Network 20

21 Questions 21