RFC: API for Neighbouring Cell Info

Bastian, Waldo waldo.bastian at intel.com
Fri Jan 29 13:04:51 PST 2010


> There are two parts to neighbor cell information. The first part
> provides meta-information on the second part, which is the actual
> measurement data.
> 
> Like you propose, the first part is a dict, with keys like cell type and
> current MCC and MNC.
> 
> The second part is the measurement data, and that is different for
> different types of cells. Not all information is mandatory for all
> modems and all cell types.

The formatting might have been a bit confusing, but I was actually proposing  a single property ("Info") containing an array (one entry for each cell) of dicts, with the dicts having measurement and other info on that particular cell.

> I think the pattern you use here is wrong. This needs to be a method
> call; a signal won't work. The measurement data is constantly changing,
> and you don't want a constant stream of PropertyChanged() signals.

Ok.

> The important property here is that the location system has a single
> method call that retrieves all relevant information from the modem, so
> that they can then do their triangulation magic.

Yes, it's important to keep things atomic.

> > 			int8 RSCP [readonly, UMTS only]
> >
> > 				Received Signal Code Power [3GPP TS 25.133
> s9.1.1.3] in dBm [-120...-25]
> >
> > 			int8 ECNO [readonly, UMTS only]
> >
> > 				CPICH Ec/No [3GPP TS 25.133 s9.1.2.3] in dB  [-
> 24...0]
> 
> This is already part of the measurement data, which I think should be in
> the per-cell information (the serving cell measurement data is still
> measurement data).

Yes, all this is per-cell, sorry if that wasn't clear.

Cheers,
Waldo


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