CC3100MOD: CC3100 Carrier Sense Threshold value

Takashi Hosokawa

Expert 1455 points

Part Number: CC3100MOD
Other Parts Discussed in Thread: CC3100, CC3100SDK

Hi All,

Please tell me about CC3100 carrier sense.

Customers evaluate at tcp_socket(AP, STA) of CC3100SDK.

1. When executing carrier sense on the CC3100 and MCU, what is the threshold value?

I think that setting the threshold with Program using API sl_Wlanset() with WLAN_GENERAL_PARAM_OPT_SCAN_PARAMS(ScanParamConfig.rssiThreshold).

Is this recognition correct?

2. If this recognition is correct, what is the default value of threshold, if you do not set WLAN_GENERAL_PARAM_OPT_SCAN_PARAMS in the Program?

3. I believe that CC3100's CCA(Clear Channel Assesment) supports both CS/CCA and CCA-ED.

Is this recognition correct?

Best Regards,

Takashi

over 8 years ago

0 Charles Oladimeji over 8 years ago

TI__Mastermind 33805 points

Hi,

I have to look into this some more and get back to you.

Regards,
Charles O

0 Takashi Hosokawa over 8 years ago in reply to Charles Oladimeji

Expert 1455 points

Hi Charles-san,

Thank you for your support.

Best Regards,

Takashi

0 Charles Oladimeji over 8 years ago in reply to Takashi Hosokawa

TI__Mastermind 33805 points

Hi Takashi,

I looked in to this and the WLAN_GENERAL_PARAM_OPT_SCAN_PARAMS(ScanParamConfig.rssiThreshold) API is for setting the scan threshold when performing scans in station mode.
e2e.ti.com/.../357557

This threshold has nothing to do with CCA.

I am looking into if and how this can be done and will get back to you when I get the feedback.

Regards ,
Charles O

0 Takashi Hosokawa over 8 years ago in reply to Charles Oladimeji

Expert 1455 points

Hi Charles-san,

Thank you for confirmation.

Sorry for reply late.

I understood WLAN_GENERAL_PARAM_OPT_SCAN_PARAMS () has nothing to do with CCA.

Customer's original question was "What is the threshold values of carrier sense radio field intensity?"

Is this value defined?

Also, what about the following contents?

> 3. I believe that CC3100's CCA(Clear Channel Assesment) supports both CS/CCA and CCA-ED.

> Is this recognition correct?

Best Regards,

Takashi

0 Charles Oladimeji over 8 years ago in reply to Takashi Hosokawa

TI__Mastermind 33805 points

1. How do you set the CCA threshold?
this is internal and not configurable.
2. What is the default threshold ?
default value is -75dBm
Does the CC3100 support CS/CCA and CCA-ED?
Yes. As it a mandatory requirement from all WLAN devices.

Regards,
Charles O

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CC3100MOD: CC3100 Carrier Sense Threshold value