Re: [EToSat] Multicast tools and scenarios
"Morten V. Pedersen" <morten@steinwurf.com> Fri, 13 December 2019 09:22 UTC
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From: "Morten V. Pedersen" <morten@steinwurf.com>
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Date: Fri, 13 Dec 2019 10:22:12 +0100
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Subject: Re: [EToSat] Multicast tools and scenarios
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Hi CJ, Thanks for this overview - makes sense. All the best, Morten On 12/11/19 4:32 PM, Su, Chi-Jiun wrote: > Hi Morten, > > - Like Wifi and cellular, signal transmitted by Wifi access point, Cellular base station and Satellite Gateway is received by all the users in the coverage area. Depending on where a user is located in the coverage area, the signal strength differs. > - In time-multiplexed DVB-S2 transmission from the gateway to the users in a spot beam in a Geo Sat system, transmission opportunity to multiple users (multicast) can be allocated more than that to a single user. That is, multicast data rate can be higher. > - for mobile satellite system with 3gpp protocol, MBMS may be supported > - for fixed satellite system, multicast support can be proprietary. > - data in management and control plane in a satellite system is being broadcast/multicast to the users in a spot beam > - broadcast/multicast of user data requires "use cases". Nowadays, most user's content is encrypted and prevalent encryption limits use cases. Multicasting in a satellite system can be accomplished as long as there is a strong use case. > > Thanks. > cj > -----Original Message----- > From: EToSat <etosat-bounces@ietf.org> On Behalf Of Morten V. Pedersen > Sent: Tuesday, December 10, 2019 4:03 PM > To: Su, Chi-Jiun <Chi-Jiun.Su@hughes.com>; etosat@ietf.org > Subject: Re: [EToSat] Multicast tools and scenarios > > CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. > > Hi CJ, > > Thanks for your reply. > > > > The delay part makes sense. > > > > On the data-rate, I find that quite interesting, is it typical to use > > higher data-rates for multicast? Is this to use less airtime? On WiFi > > the situation is quite messy and multicast is not very well supported > > (low data-rates etc.) - do you know how the support is for satellite? > > > > All the best, > > Morten > > > > On 12/9/19 2:49 PM, Su, Chi-Jiun wrote: > >> Hi Morten, >> - delay will be the same since it is dictated by law of physics excluding queuing delay >> - data rate can be higher than per-terminal download data rate. >> Thanks. >> cj >> -----Original Message----- >> From: EToSat <etosat-bounces@ietf.org> On Behalf Of Morten V. Pedersen >> Sent: Monday, December 9, 2019 5:28 AM >> To: etosat@ietf.org >> Subject: [EToSat] Multicast tools and scenarios >> CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. >> Dear all, >> Following up on the "Download Regression Tests" thread. Which focuses on >> unicast (as far as I can tell). We are looking at multicast over >> satellite (in particular for file delivery). I'm not a satellite expert >> so I was wondering if similar parameters with respect to delay, >> data-rate etc. are valid there? >> Also what (if any) would be the state-of-the art solution for that? >> All the best, >> Morten >> _______________________________________________ >> EToSat mailing list >> EToSat@ietf.org >> https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/etosat__;!!Emaut56SYw!nyMSmIq-w8rvK073xEu_Ue8M3CDeZ-usJaecpU5a6t2316ScAZvAnRuAomAf2s8-Nw$ > > > _______________________________________________ > > EToSat mailing list > > EToSat@ietf.org > > https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/etosat__;!!Emaut56SYw!iM0R0ruhykN0LLab2TFAZqnWEuwDgCq1_hitr6IuIjTJOErN0dUwtd-uXfnfszd1Tw$ > > _______________________________________________ > EToSat mailing list > EToSat@ietf.org > https://www.ietf.org/mailman/listinfo/etosat
- [EToSat] Download Regression Tests Border, John
- Re: [EToSat] Download Regression Tests Christian Huitema
- Re: [EToSat] Download Regression Tests Kuhn Nicolas
- Re: [EToSat] Download Regression Tests Gorry Fairhurst
- Re: [EToSat] Download Regression Tests François Michel
- Re: [EToSat] Download Regression Tests Christian Huitema
- Re: [EToSat] Download Regression Tests Kuhn Nicolas
- Re: [EToSat] Download Regression Tests Kuhn Nicolas
- Re: [EToSat] Download Regression Tests Christian Huitema
- Re: [EToSat] Download Regression Tests Kuhn Nicolas
- [EToSat] Multicast tools and scenarios Morten V. Pedersen
- Re: [EToSat] Multicast tools and scenarios Su, Chi-Jiun
- Re: [EToSat] Multicast tools and scenarios Morten V. Pedersen
- Re: [EToSat] Multicast tools and scenarios Su, Chi-Jiun
- Re: [EToSat] Multicast tools and scenarios Morten V. Pedersen