Re: [digitalradio] Emcomm Message Notification Routing Networking Re: Push Messages to the Field
I will elaborate on this as soon as a get home from our cqww-cw location, packing now... Rein CT3/PA0R/P, CT9L -Ursprüngliche Nachricht- Von: expeditionradio [EMAIL PROTECTED] Gesendet: 03.12.08 07:21:45 An: digitalradio@yahoogroups.com Betreff: [digitalradio] Emcomm Message Notification Routing Networking Re: Push Messages to the Field Hi John, Thanks very much, for the detailed comments on PSKmail for this type of application. That is the probably the closest I've seen to approaching push message capability. Here's some follow-up questions: How does the mobile operator determine which PSKmail base and frequency to check in to at any particular moment? Is it manually selected by the operator, i.e., does the mobile operator need to keep manually checking if they remain linked-to-base on an ongoing basis? Does the op need to keep finding another base to be linked-to-base with, so that the notification messages get routed properly? What is the fall-back position for the system for notification, in the case that none of the bases show a link-to-base condition when the target mobile op hasn't checked in for a while? Is there a time-out or not-linked indication to the network or mobile op? I'm very interested in the network server side of how this can work smoothly. I think that it is the key to getting the best notification system. It would make sense to join as many ham networks as possible to this, to enable a message to be routed to the target operator by any method they are using. A mutual cooperation between ham networks could be forged, and this could make it a reality. If one dials a telephone number, it isn't necessary to know which telephone provider company that the called party is using. We need to carry this type of universal networking into the ham radio realm. The email address provides universal portability and networking opportunities for hams. Hams could adopt specific email addresses that are used for emcomm purposes, and use email forwarding. This simple feature could be leveraged to provide powerful networking for hams. At least for the HFN system, the high probability of linking on HF has already been achieved through the power of a network of geographically distributed HF base stations running simultaneously on all bands. It has often been pointed out that HF base-to-mobile can be statistically undependable for 24/7 point-to-point communications with a base station, due to the changing ionospheric propagation and channel conditions. However, the statistical probability for successful communications with a mobile goes way up when dynamic linking with any base in a geographically distributed HF network is added. A single ham band may not be open at any given instant between 2 specific stations. In fact, there might not be any HF band open between those 2 specific stations :) But, it is very rare that all HF bands are closed to everywhere. That points to the need to develop a wider, more flexible, network outlook for HF Emcomm systems; one that is not concentrated so much on NVIS or specific regular propagation patterns. The solar flare that happened during the Katrina disaster response certainly taught us how fragile traditional Net-Control-centric state nets can be that rely on 75 meters only. Bonnie VR2/KQ6XA John (VK2ETA) wrote: Bonnie, The way Pskmail addresses the push messages is by using two concepts: 1. A notion of Linked-to-a-base status and 2. a centrally accessible (over the internet) database so that servers can be coordinated and avoid duplication). More details: The clients (mobile units) have to check in by sending a link to base. From there on, the server will push any new APRS messages (without ack) to the client. Of course other message sources could be pushed as well. Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/sked Yahoo! Groups Links -- http://pa0r.blogspirit.com Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/sked Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[digitalradio] Emcomm Message Notification Routing Networking Re: Push Messages to the Field
Bonnie, I have seen that Rein, the designer of the system, will reply to your questions. I will let him do so since he has more knowledge than I have on the PSKmail system. I might comment after on the potential integration of the concepts for HFN since I have also used this system under Multipsk. 73s, John (VK2ETA) --- In digitalradio@yahoogroups.com, expeditionradio [EMAIL PROTECTED] wrote: Hi John, Thanks very much, for the detailed comments on PSKmail for this type of application. That is the probably the closest I've seen to approaching push message capability. Here's some follow-up questions: How does the mobile operator determine which PSKmail base and frequency to check in to at any particular moment? Is it manually selected by the operator, i.e., does the mobile operator need to keep manually checking if they remain linked-to-base on an ongoing basis? Does the op need to keep finding another base to be linked-to-base with, so that the notification messages get routed properly? What is the fall-back position for the system for notification, in the case that none of the bases show a link-to-base condition when the target mobile op hasn't checked in for a while? Is there a time-out or not-linked indication to the network or mobile op? I'm very interested in the network server side of how this can work smoothly. I think that it is the key to getting the best notification system. It would make sense to join as many ham networks as possible to this, to enable a message to be routed to the target operator by any method they are using. A mutual cooperation between ham networks could be forged, and this could make it a reality. If one dials a telephone number, it isn't necessary to know which telephone provider company that the called party is using. We need to carry this type of universal networking into the ham radio realm. The email address provides universal portability and networking opportunities for hams. Hams could adopt specific email addresses that are used for emcomm purposes, and use email forwarding. This simple feature could be leveraged to provide powerful networking for hams. At least for the HFN system, the high probability of linking on HF has already been achieved through the power of a network of geographically distributed HF base stations running simultaneously on all bands. It has often been pointed out that HF base-to-mobile can be statistically undependable for 24/7 point-to-point communications with a base station, due to the changing ionospheric propagation and channel conditions. However, the statistical probability for successful communications with a mobile goes way up when dynamic linking with any base in a geographically distributed HF network is added. A single ham band may not be open at any given instant between 2 specific stations. In fact, there might not be any HF band open between those 2 specific stations :) But, it is very rare that all HF bands are closed to everywhere. That points to the need to develop a wider, more flexible, network outlook for HF Emcomm systems; one that is not concentrated so much on NVIS or specific regular propagation patterns. The solar flare that happened during the Katrina disaster response certainly taught us how fragile traditional Net-Control-centric state nets can be that rely on 75 meters only. Bonnie VR2/KQ6XA John (VK2ETA) wrote: Bonnie, The way Pskmail addresses the push messages is by using two concepts: 1. A notion of Linked-to-a-base status and 2. a centrally accessible (over the internet) database so that servers can be coordinated and avoid duplication). More details: The clients (mobile units) have to check in by sending a link to base. From there on, the server will push any new APRS messages (without ack) to the client. Of course other message sources could be pushed as well.
[digitalradio] Emcomm Message Notification Routing Networking Re: Push Messages to the Field
Hi John, Thanks very much, for the detailed comments on PSKmail for this type of application. That is the probably the closest I've seen to approaching push message capability. Here's some follow-up questions: How does the mobile operator determine which PSKmail base and frequency to check in to at any particular moment? Is it manually selected by the operator, i.e., does the mobile operator need to keep manually checking if they remain linked-to-base on an ongoing basis? Does the op need to keep finding another base to be linked-to-base with, so that the notification messages get routed properly? What is the fall-back position for the system for notification, in the case that none of the bases show a link-to-base condition when the target mobile op hasn't checked in for a while? Is there a time-out or not-linked indication to the network or mobile op? I'm very interested in the network server side of how this can work smoothly. I think that it is the key to getting the best notification system. It would make sense to join as many ham networks as possible to this, to enable a message to be routed to the target operator by any method they are using. A mutual cooperation between ham networks could be forged, and this could make it a reality. If one dials a telephone number, it isn't necessary to know which telephone provider company that the called party is using. We need to carry this type of universal networking into the ham radio realm. The email address provides universal portability and networking opportunities for hams. Hams could adopt specific email addresses that are used for emcomm purposes, and use email forwarding. This simple feature could be leveraged to provide powerful networking for hams. At least for the HFN system, the high probability of linking on HF has already been achieved through the power of a network of geographically distributed HF base stations running simultaneously on all bands. It has often been pointed out that HF base-to-mobile can be statistically undependable for 24/7 point-to-point communications with a base station, due to the changing ionospheric propagation and channel conditions. However, the statistical probability for successful communications with a mobile goes way up when dynamic linking with any base in a geographically distributed HF network is added. A single ham band may not be open at any given instant between 2 specific stations. In fact, there might not be any HF band open between those 2 specific stations :) But, it is very rare that all HF bands are closed to everywhere. That points to the need to develop a wider, more flexible, network outlook for HF Emcomm systems; one that is not concentrated so much on NVIS or specific regular propagation patterns. The solar flare that happened during the Katrina disaster response certainly taught us how fragile traditional Net-Control-centric state nets can be that rely on 75 meters only. Bonnie VR2/KQ6XA John (VK2ETA) wrote: Bonnie, The way Pskmail addresses the push messages is by using two concepts: 1. A notion of Linked-to-a-base status and 2. a centrally accessible (over the internet) database so that servers can be coordinated and avoid duplication). More details: The clients (mobile units) have to check in by sending a link to base. From there on, the server will push any new APRS messages (without ack) to the client. Of course other message sources could be pushed as well.
