Re: [homenet] https://tools.ietf.org/id/draft-ietf-mboned-ieee802-mcast-problems-09.txt
christophe.lohr@telecom-bretagne.eu Wed, 23 October 2019 09:27 UTC
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Date: Wed, 23 Oct 2019 11:27:40 +0200
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Subject: Re: [homenet] https://tools.ietf.org/id/draft-ietf-mboned-ieee802-mcast-problems-09.txt
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Hi, I have a couple of naive questions * Section 3.1.1 «Since typically there are no ACKs for multicast packets...» Does anyone remember why WiFi had chosen not to acknowledge multicast/broadcast packets? This choice was certainly made on the basis of assumptions. Which ones? Are these assumptions still valid? * Section 3.1.4 «Multicast traffic is delayed in a wireless network if any of the STAs in that network are power savers. All STAs associated to the AP have to be awake at a known time to receive multicast traffic.» Why? Why does everyone have to be awake at the same time? APs have buffers, isn't? So, why not delivering immediately multicast packets to awaked STAs (which have to acknowledge them), and keep packets in buffers for sleeping STAs? I would be surprised if such a naive process have not been studied when WiFi was designed. Does anyone remember why this was not selected? * Is there any standard or well-known test to measure the quality of an AP regarding its ability to manage multicast traffic? * The paper is about multicast on wireless links, but what's about PowerLine Adapters? Best regards, Christophe
- [homenet] https://tools.ietf.org/id/draft-ietf-mb… Dave Taht
- Re: [homenet] https://tools.ietf.org/id/draft-iet… Ray Hunter (v6ops)
- Re: [homenet] https://tools.ietf.org/id/draft-iet… christophe.lohr
- Re: [homenet] https://tools.ietf.org/id/draft-iet… Eric Vyncke (evyncke)