File Type:
pdf
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Uncategorized
Presenters :
Jeff Berryman - Bosch
Year :
2019
dlp_document_download :
1AES74: New Standard for Media Network Directory RequirementsJeff BerrymanBosch CommunicationsChair, AES SC-02-12-N, Open Directory ArchitectureChair, AES SC-02-12-L, AES70Vice-chair, AES Standards CommitteeChair, OCA Alliance Technical Committee 2 SYSTEM CONTROL MEDIA TRANSPORT TIME SERVICES DIRECTORY CONNECTION MANAGEMENT AES74Media Network DirectoryIn Context 3DIRECTORY (adapted from Wikipedia)A directory is a map between names and values. It allows the lookup of a value given a name, similar to a dictionary. As a word in a dictionary may have multiple definitions, in a directory, a name may be associated with multiple, different pieces of information. Likewise, as a word may have different parts of speech and different definitions, a name in a directory may have many different types of data.Principle: A directory is a kind of database. Most of the knowledge, language, rules, and practices for databases apply to directories. 4AES74Media Network DirectoryvsIPNetwork Directory TCP /IP Hostname IP address Other attributes IP Network Directory (DNS ) Media Network Media device name , Media stream name , Media element name Hostname & po rt , Endpoint name Other attributes Media Network Directory 5 TCP /IP Hostname IP address Other attributes IP Network Directory (DNS ) Media Network Media device name , Media stream name , Media element name Hostname & po rt , Endpoint name Other attributes Media Network Directory AES74Directories in Action:Name Resolution 6What's AES74? 7What's aes74AES74 is a requirements standard.-A requirements standard specifies a desired outcome (whatis needed).-It does not specify a way of achieving that outcome (howto do it).Howtostandards are called implementation standards.Examples-Requirements standard: An automobile must be able to come to a stop whenever desired.-Implementation standard: An automobile must have a hydraulic braking system.AES74 is a requirements standard for media network directories.-It defines a number of terms used for discussing media networks and their directories.-It specifies the functions media network directories must / should provide.-It does notdefine architectures or protocols or programming approaches for providing those functions. 8Example of a problem that current directory schemes don't handle well 9A five-story research building Example Directory Problem 10 R R R R R S S S S S 4 3 2 1 5 Add an Ethernet backbone with routers & switches on every floorExample Directory Problem 11 R R R R R S S S S S 4 3 2 1 5 Add some nodes to each floor's subnetExample Directory Problem 12 R R R R R S S S S S 4 3 2 1 5 Add some research groups, each with its own media network, with some groups spread over several floorsExample Directory Problem 13 R R R R R S S S S S 4 3 2 1 5 How can these media networks coexist gracefully? How do the devices and controllers find each other? How does a controller avoid affectingdevices not its own? The problemExample Directory Problem 14What's in AES74? 15AES74 table of contents -highlights -1Functionality-Registration / deregistration-QueryingSubscriptions-Persisting queries-Discovery•Directory access-Directory services-Directory access protocolsCoexistence of multiple directoriesNested directories-Entity path-Name resolution 16AES74 table of contents -highlights -2Data network considerations-Data network type independence-Data network topology independence-Minimal effect on infrastructure-Shared data networksDiscoverabilitySecurity and access controlScalabilityPerformanceCentralized and distributed implementationsReliability and robustnessEase of use 17Status of AES74 today 18Status of AES74 todayAES74 is currently a draft AES standard in the public comment phase.Public comments will be accepted until November 21st.A downloadable copy of the draft is here:http://www.aes.org/standards/blog/2019/10/call-for-comment-on-draft-aes74-xxxxWhen the comment period expires, the responsible AES Standards task group will resolve any comments that have been received.When no unresolved comments remain, AES74 will become an official AES standard. 19Questions? Ask meJeff Berrymanja.Berryman@us.bosch.com+1 952 457 5445 [24/7 mobile]THANKS
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