Discovery and Launch
DIAL, an acronym for DIscovery And Launch, is a protocol co-developed by Netflix and YouTube with help from Sony and Samsung. It is a mechanism for discovering and launching applications on a single subnet, typically a home network. It relies on Universal Plug and Play (UPnP), Simple Service Discovery Protocol (SSDP), and HTTP protocols. The protocol works without requiring a pairing between devices. It was formerly used by the Chromecast media streaming adapter that was introduced in July 2013 by Google. (Chromecast instead uses mDNS.) DIAL enables so-called "2nd screen" devices, such as tablet computers and mobile phones to send content to "1st screen" devices, such as televisions, Blu-ray players, and set-top boxes.
Terminology and operation
- 1st screen: a television, Blu-ray player, set-top-box, or similar device.
- 2nd screen: a smartphone, tablet, or similar device.
- DIAL Server: a device implementing the server side of the DIAL protocol, usually a 1st screen device.
- DIAL Client: a device that can discover and launch applications on a DIAL server – usually a 2nd screen device.
The DIAL protocol has two components, DIAL Service Discovery and the DIAL REST Service. The DIAL Service Discovery enables a DIAL client device to discover DIAL servers on its local network segment and obtain access to the DIAL REST Service on those devices. The DIAL REST Service enables a DIAL client to query, launch and optionally stop applications on a DIAL Server device.
- Service Location Protocol
- Zero configuration networking
- Neighbor Discovery Protocol
- Simple Service Discovery Protocol
- "The story behind DIAL: How Netflix and YouTube want to take on AirPlay — Tech News and Analysis". Gigaom.com. Retrieved 2014-06-04.
- Naddaf, Ali (May 1, 2014). "Google Cast Developers (Chromecast developer post)". Google+. Google.
- In the U.S., Tablets are TV Buddies while eReaders Make Great Bedfellows
- "Protocol Specification - DIAL". Sites.google.com. 2014-05-20. Retrieved 2014-06-04.