SmartLink latency/delay

  • 1
  • Question
  • Updated 12 months ago
What is the latency introduced by SmartLink in addition to any link latency? For example, the Opus codec introduces a minimum of 25 ms delay; what else is introducing software delays and by how much? How about encryption delays?
Photo of Varistor

Varistor

  • 315 Posts
  • 65 Reply Likes

Posted 12 months ago

  • 1
Photo of Steve K9ZW

Steve K9ZW, Elmer

  • 1255 Posts
  • 653 Reply Likes
Post brokering the connection I didn't understand SmartLink per say being a man-in-the-middle or further participating in the radio traffic?

That would suggest very nominal, perhaps even less than the VPN alternative?

73

Steve
K9ZW
Photo of Gerald - K5SDR

Gerald - K5SDR, Employee

  • 794 Posts
  • 1436 Reply Likes
After brokering the connection, communications is peer to peer and our server is no longer involved.
Photo of Varistor

Varistor

  • 315 Posts
  • 65 Reply Likes
It's very simple- the codec alone introduces at least 25 ms. Encryption when done right is computationally expensive and requires hardware acceleration. It is important to understand what's been inserted in the SL chain and the resulting delay/latency.
Photo of Steve K9ZW

Steve K9ZW, Elmer

  • 1255 Posts
  • 653 Reply Likes
But how is that any different for SmartLink as the same operations have existed from day one to put SmartSDR online?

SmartLink I don't think disturbs any of that, and doesn't intercede in the client to radio-server in itself.

Included in SmartSDR along with SmartLink is better CODECs and more options. But that is a SmartSDR function one would guess.

73

Steve
K9ZW
Photo of Gerald - K5SDR

Gerald - K5SDR, Employee

  • 794 Posts
  • 1436 Reply Likes
We encrypt control data only (e.g. frequency, PTT, etc.). There is no reason to encrypt audio, which is public over the airwaves by definition.