PyDTN

Transcript

1. PyDTN Matheus Clark dos Santos Monte @matheuscsmonte matheus.m@samsung.com
2. Hi! Software Engineer at Sidia instituto de ciência e tecnologia BS by Universidade do Estado do Amazonas Open source contributor to React-Ape, React-TV e Uber Kepler.gl
3. How send information to Space?
5. DTN is a computer networking model and a system of rules for transmitting information, often referred to as a protocol suite, that extends the terrestrial Internet capabilities into the challenging communication environments in space where the conventional Internet does not work well. - Nasa (https://www.nasa.gov/content/dtn)
7. How try DTN without NASA’s satellites?
8. Solutions • #1 – Build your own satellites J • #2 – or Use Simulators
9. IBR-DTN • Complete • Write in C++ • Complex source code • Hard code patterns • Hard environment configuration
10. PyDTN • Based on Python 2.7 • Easy source code • Easy simulations • Good documentation • Can be integrate to another applications
11. Basic PyDTN namespace • pydtn • pydtn.namtrace • pydtn.network • pydtn.flowtrace • pydtn.storetrace • pydtn.storeprofile • pydtn.sampleapp
12. Simulation Setup pydtn.namtrace.setup("example.nam") pydtn.flowtrace.setup("example.flow") pydtn.storetrace.setup("example.stor") pydtn.storeprofile.setup("example.storprof") pydtn.config("bundle_lifetime",[0,9000]); pydtn.stats( "stats.out", 1000 ) pydtn.network.algorithm("forwarding:routed:explicit")
13. Create nodes node1 = pydtn.network.addNode("\0\1",capacity=4096,stable=10000) node2 = pydtn.network.addNode("\1\0",capacity=4096,stable=10000) node3 = pydtn.network.addNode("\1\1",capacity=4096) node2.config("custody","spaceavail") node2.config("resend",[0,5000])
14. Create Links link12 = pydtn.network.addLink( node1, node2, latency=0.003, bandwidth=100 ) link21 = pydtn.network.addLink( node2, node1, latency=0.003, bandwidth=100 ) link23 = pydtn.network.addLink( node2, node3, latency=0.003, bandwidth=100 ) link32 = pydtn.network.addLink( node3, node2, latency=0.003, bandwidth=100 )
15. Setup Routing pydtn.network.route() pydtn.network.applyToNodes(pydtn.storeprofile.collect) pydtn.network.applyToNodes(pydtn.sampleapp.attach)
16. Scheduling events node1.emit([0,1],"data",node3,"hello world") node1.emit([0,2],"data",node3,"hello world") node1.emit([0,3],"data",node3,"hello world")
17. Simply application pydtn.sampleapp.send(node1,node3,"app data",[0,50]) for i in range(1000): node1.emit([0,100],"data",node3,"hello world") for i in range(20): node1.emit([0,100000],"datafake",node3,10240) def td( now ): t = now t[0] += 0 t[1] += 100000 return t def gen(): node1.emit(sim.time(),"datafake",node3,10) tg = sim.Entity("trafficgen") tg.config("time_dist",td) tg.config("generator",gen) tg.emit([0,5000]) sim.stopAt([0,600000]) sim.run() sys.exit
18. Complete sample available in • https://github.com/matheusmonte/AmazoniaPyCon2017Sample
19. https://www.sidia.org.br/trabalhe-no-sidia/
20. github.com/matheusmonte @matheuscsmonte matheus.m@samsung.com matheuscsmonte@gmail.com