D-STAR and the VoIP WX Net - voipwx.net

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D-STAR and the VoIP WX Net - voipwx.net

  1. 1. D-STAR and the VoIP WX Net Tony Langdon VK3JED January 4, 2009
  2. 2. Contents <ul><ul><li>What is D-STAR? </li></ul></ul><ul><ul><li>What can D-STAR do? </li></ul></ul><ul><ul><ul><li>DD and DV </li></ul></ul></ul><ul><ul><ul><li>Gateways and Gateway Routing </li></ul></ul></ul><ul><ul><ul><li>D-Plus - Enhanced Features </li></ul></ul></ul><ul><ul><ul><li>DV Dongle </li></ul></ul></ul><ul><ul><li>Current EMCOMM Usage </li></ul></ul><ul><ul><li>Strategies to Incorporate D-STAR into VoIP WX Net </li></ul></ul><ul><ul><ul><li>Identify D-STAR Gateways </li></ul></ul></ul><ul><ul><ul><li>Utilise the DV Dongle </li></ul></ul></ul><ul><ul><ul><li>Link D-STAR to IRLP/EchoLink </li></ul></ul></ul><ul><ul><li>D-STAR is here, we need to adapt </li></ul></ul><ul><ul><li>Questions? </li></ul></ul>
  3. 3. What is D-STAR? <ul><li>D-STAR is a new digital voice and data network for Amateur use. </li></ul><ul><ul><li>Developed by JARL </li></ul></ul><ul><ul><li>Currently marketed by ICOM </li></ul></ul><ul><ul><li>On air protocol is open and published by JARL </li></ul></ul><ul><ul><li>Digital from end to end </li></ul></ul>
  4. 4. What can D-STAR do? <ul><ul><li>DD and DV </li></ul></ul><ul><ul><li>Gateways and Gateway Routing </li></ul></ul><ul><ul><li>D-Plus - Enhanced Features </li></ul></ul><ul><ul><li>DV Dongle </li></ul></ul>
  5. 5. DD and DV <ul><li>DD is the high speed digital data mode. </li></ul><ul><ul><li>128kbps </li></ul></ul><ul><ul><li>TCP/IP capable - can run web browsers, etc. </li></ul></ul><ul><ul><li>Global reach via the Gateway network </li></ul></ul><ul><ul><li>Available on 1.2 GHz only </li></ul></ul><ul><li>  </li></ul><ul><li>DV is a simultaneous voice/low speed mode. </li></ul><ul><ul><li>4.8kbps total bitrate </li></ul></ul><ul><ul><li>Voice 2400bps with 1200bps FEC </li></ul></ul><ul><ul><li>Voice uses proprietary AMBE vocoder </li></ul></ul><ul><ul><li>Data channel supports D-PRS, text messaging and data transfer </li></ul></ul><ul><ul><li>Several third party applications make use of data channel, including &quot;digital SSTV&quot; and text chat </li></ul></ul>
  6. 6. Gateways and Gateway Routing <ul><li>Gateways utilise the Internet to provide global D-STAR connectivity. </li></ul><ul><ul><li>DD mode implemented as a global IP network over VPN </li></ul></ul><ul><ul><li>DV mode uses callsign based &quot;source routing&quot; </li></ul></ul><ul><ul><ul><li>MY - My callsign (e.g. VK3JED) </li></ul></ul></ul><ul><ul><ul><li>UR - destination callsign </li></ul></ul></ul><ul><ul><ul><ul><li>Plain callsign - destination is user (e.g. NU5D) </li></ul></ul></ul></ul><ul><ul><ul><ul><li>/CALL - route via specified radio port (e.g. /K5TIT  B) </li></ul></ul></ul></ul><ul><ul><ul><li>R1 - Local radio port (e.g. VK3RWN A) </li></ul></ul></ul><ul><ul><ul><li>R2 - Local gateway (e.g. VK3RWN G) </li></ul></ul></ul><ul><ul><li>Called station must setup reciprocal route to communicate with calling station - One touch reply. </li></ul></ul><ul><ul><li>Multicast - allows up to 10 gateways to form a net. </li></ul></ul>
  7. 7. D-Plus - Enhanced Gateway Features <ul><li>D-Plus, written by Robin AA4RC, adds another layer of functionality to the D-STAR system, including: </li></ul><ul><li>  </li></ul><ul><ul><li>Gateway linking - similar to IRLP node-node connections </li></ul></ul><ul><ul><li>Reflector linking - similar to IRLP reflectors </li></ul></ul><ul><ul><li>DV Dongle connections </li></ul></ul><ul><ul><ul><li>DV Dongle is a piece of hardware that connects to a USB port and provides the AMBE vocoder </li></ul></ul></ul><ul><ul><ul><li>Allows PC based users to connect to D-Plus enabled gateways and reflectors </li></ul></ul></ul><ul><ul><ul><li>Means of accessing D-STAR where no local gateway exists </li></ul></ul></ul>
  8. 8. Current EMCOMM Usage <ul><li>D-STAR is already being utilised for SKYWARN/EMCOMM applications. </li></ul><ul><ul><li>SE US has significant D-STAR infrastructure. </li></ul></ul><ul><ul><li>SE SKYWARN Net on REF002 A </li></ul></ul><ul><ul><li>Implications for VoIP WX Net, need to get reports from D-STAR users to NHC. </li></ul></ul>
  9. 9. Strategies to Incorporate D-STAR into VoIP WX Net <ul><li>To increase our D-STAR capabilities, we can consider: </li></ul><ul><ul><li>Identify local gateways and obtain D-STAR capable radios. </li></ul></ul><ul><ul><li>Utilise the DV Dongle </li></ul></ul><ul><ul><ul><li>If there is no local gateway. </li></ul></ul></ul><ul><ul><ul><li>As an alternative to the local gateway. </li></ul></ul></ul><ul><ul><li>Link the VoIP WX Net to D-STAR </li></ul></ul><ul><ul><ul><li>Analog gateway possible utilising D-STAR radio for reflector based nets. </li></ul></ul></ul><ul><ul><ul><li>Digital audio linking technology exists, but currently controversial. </li></ul></ul></ul><ul><ul><ul><li>Linking is not an option when only routing is used. </li></ul></ul></ul>
  10. 10. D-STAR - EchoLink/IRLP Interoperability <ul><li>Interoperability between D-STAR and the existing IRLP and EchoLink technologies is of great potential benefit to the VoIP WX Net.  However, there are currently a few challenges that are hindering its implementation. </li></ul><ul><li>The technology exists - It CAN be done.  However: </li></ul><ul><li>  </li></ul><ul><ul><li>Similar issues to those raised by linking IRLP to EchoLink. </li></ul></ul><ul><ul><li>Current implementations are controversial and early efforts lacked sufficient administrator controls. </li></ul></ul><ul><ul><li>D-STAR community has reacted poorly to these efforts, due in part to how they have been implemented and tested, and partly because of community resistance. </li></ul></ul><ul><ul><li>New strategy to achieve interoperability is needed - http://vk3jed.blogspot.com has some ideas. </li></ul></ul>
  11. 11. D-STAR is here! <ul><li>D-STAR is here, and we need to be in a position to work with D-STAR users. </li></ul><ul><ul><li>Some groups are already using D-STAR - SE SKYWARN </li></ul></ul><ul><ul><li>D-STAR is integral to EMCOMM planning in some states </li></ul></ul><ul><ul><li>Additional data capabilities of D-STAR offer new opportunities </li></ul></ul><ul><ul><li>Broaden our selection of tools </li></ul></ul><ul><ul><li>Legacy analog systems are not going away in a hurry - We will be working with both for a long time. </li></ul></ul><ul><ul><li>EMCOMM community needs to work with D-STAR community and software developers to restart interoperability efforts. </li></ul></ul>
  12. 12. Questions?

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