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w3c / ortc

ORTC Community Group specification repository (see W3C WebRTC for official standards track)
http://www.w3.org/community/ortc/
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Warmth policy #55

Open robin-raymond opened 10 years ago

robin-raymond commented 10 years ago

We don't current have one but something is needed at minimal.

Scenario: Offer containing candidates is given but before any (or all) answers arrive, the candidates become stale due to inactivity.

Scenario: Always want to keep a TCP relay connection open as a backup should local addresses become disconnected (e.g. backup wwan connection is alive but local wifi lan goes down).

I'm sure a ton of other scenarios can be dreamed up but we need something at minimal as a proposal. As such, here's my spaghetti on wall idea to promote discussion:

(again, not sure how to express in WebIDL, but if it were C++)

enum WarmthPolicy {
  KeepWarmUntilIceCompleted = 0x00000001,

  AlwaysKeepServerReflexiveWarm = 0x00000010,
  AlwaysKeepRelayUdpWarm = 0x00000020,
  AlwaysKeepRelayTcpWarm = 0x00000040, 

  AlwaysKeepWLanWarm = 0x00001000,
  AlwaysKeepWWanWarm = 0x00002000,
  AlwaysKeepVpnWarm = 0x00004000
};

We can add a simple: setWarmthPolicy(...) onto the API.

robin-raymond commented 10 years ago

http://lists.w3.org/Archives/Public/public-ortc/2014Apr/0032.html

martinthomson commented 10 years ago

EnumSets can be represented as arrays or sequences (JavaScript has no sets), with string values.

juberti commented 10 years ago

Since typically you won't want to keep wwan hot at the same time as wlan (due to battery concerns), I don't think we have a clear use case here.

This will almost certainly require ICE work in IETF too, so I don't think this will be that simple.

robin-raymond commented 10 years ago

Use case: Plugged in stationary mobile tablet with wwan enabled (i.e. no battery concerns). You keep wwan hot in case person detaches and starts walking outside the wlan specific area while in a call (at least for a specific period of time).

juberti commented 10 years ago

I hear what you are saying, but that use case seems very specific. The general solution that I think you would want would be to proactively bring up wwan when the signal strength for wlan drops below some threshold. But that is something different altogether.

aboba commented 8 years ago

Peter: Backup candidate pairs make sense, but not sure if this level of control is necessary.