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From: Alex J Lennon <ajlennon@dynamicdevices.co.uk>
To: ofono@ofono.org
Subject: Re: Bug/Oversight in gatchat/gatresult.c with negative numbers
Date: Tue, 03 Aug 2021 15:45:09 +0100	[thread overview]
Message-ID: <6130ae5f-0d7c-cc40-e94b-114cdb452076@dynamicdevices.co.uk> (raw)
In-Reply-To: <70bd0c15-0fe5-59ea-f619-54dadd35e586@gmail.com>

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On 03/08/2021 15:28, Denis Kenzior wrote:
> Hi Alex,
>
>> I have been chasing this up with Quectel and they tell me this the 
>> correct implementation.
>>
>> "QCOPS and QENG command show the RSSI、RSRP and SINR value of the 
>> network, this is in accordance with the 3GPP TS regulations, so it is 
>> normal for negative numbers to be displayed.image"
>
>
> So the image shows the value for <rsrp>
>
> '0' if -140 dbm
> ...
> '95' if dbm is -46 to -45
> etc.
>
> <rsrp> (what is actually sent over AT commands) is never negative. 
> Isn't the image supporting my earlier assertion:  'AT commands do not 
> have a concept of negative numbers'?
>
> oFono exposes the <rsrp> value from 3GPP:
>
> "byte ReferenceSignalReceivedPower [optional, lte]
>
>         Contains the Reference Signal Received Power.  Valid range of 
> values
>         is 0-97. Refer to <rsrp> in 27.007, Section 8.69 for more 
> details.
> "
>
> Regards,
> -Denis


Thanks... will go back to Quectel... (!)

Cheers,

Alex

  reply	other threads:[~2021-08-03 14:45 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-20 16:11 Bug/Oversight in gatchat/gatresult.c with negative numbers Alex J Lennon
2021-07-27 14:38 ` Denis Kenzior
2021-07-27 15:02   ` Alex J Lennon
2021-08-03  9:48   ` Alex J Lennon
2021-08-03 14:28     ` Denis Kenzior
2021-08-03 14:45       ` Alex J Lennon [this message]
2021-08-06  9:31       ` Alex J Lennon
2021-08-06 14:06       ` Alex J Lennon
2021-08-06 14:20         ` Denis Kenzior
2021-08-06 14:28           ` Alex J Lennon
2021-08-06 14:44             ` Denis Kenzior
2021-08-06 14:49               ` Alex J Lennon
2021-08-06 15:02                 ` Denis Kenzior
2021-08-09  6:40                   ` Martin =?unknown-8bit?q?Hundeb=C3=B8ll?=

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