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Re: [802.3_ISAAC] [Assessing Transceiver Complexity and Power for Automotive Imaging Sensors]

Ky-Anh

 

Thanks for the question. I believe I did answer that question in the call, the comparison for power saving is for DSP active power. Please see page 11.

 

“During active periods, the DSP power is also reduced by 95%”.

 

Thanks

Ahmad

 

Sent from Mail for Windows

 

From: Ky-Anh Tran
Sent: Wednesday, July 17, 2024 3:45 PM
To: STDS-802-3-ISAAC@xxxxxxxxxxxxxxxxx
Subject: Re: [802.3_ISAAC] [Assessing Transceiver Complexity and Power for Automotive Imaging Sensors]

 

Thank you Ahmad, Mehmet for the detailed power / complexity analysis.

 

Related to alireza’s request, I was having a hard time understanding the assumptions lead to the 95% power saving calculation, slide 12 of:

https://www.ieee802.org/3/dm/public/0724/Chini_Tazebay_3dm_01a_0724.pdf

“Compared to P802.3ch EEE, up to 95% savings in complexity and power is expected using a ADC/DSP-based solution and even more savings using a CTLE+DFE for equalization”

 

  1. Is the relative power comparison only comparing receiver active power?
    1. I assume this ignores any % active time, as well as transmitter analog/digital, bias/clocking, PCS power?
  2. Is the payload rate downstream compared between the 802.3ch PHY and TDD PHY matched? (10G vs. 2.5G?)
  3. I can’t find the precise timing parameters for this TDD scheme.  However I would greatly appreciate if you clarify how the active time % compare between the 802.3ch and TDD scheme you are comparing.  802.3ch PHY stays in full duplex a relatively low percentage for typical camera traffic (1-2%).

 

 

From: Alireza Razavi <arazavimajom@xxxxxxxxxxx>
Sent: Wednesday, July 17, 2024 2:30 PM
To: STDS-802-3-ISAAC@xxxxxxxxxxxxxxxxx
Subject: [802.3_ISAAC] [Assessing Transceiver Complexity and Power for Automotive Imaging Sensors]

 

Ahmad/Mehmet

Thank you for your presentation.

Could you provide more details about your assumptions for the materials in slide 11? Additionally, can your model or measurement compare the average and maximum power of the PHY on the camera side for EEE and time division mode? Furthermore, you compared two methods for the 2.5G/100M mode. How do these numbers change for the 10G/100M mode?

Best

Alireza

 

 

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