CID data for CDMA


#1

I’ve got a question about the context of the CID field for CDMA records. I was looking at Sprint data that I extracted. Here’s a snapshot of the CDMA data (see below). Here’s my question. Does the CID for CDMA in the OpenCellID database represent a unique BTS or is it a cell sector? For example, when I extract LTE data from the OpenCellID database the CID is a unique sector identifier. It’s clear that for the LTE data one can take the CID and do a shift right by 8 bits to extract the corresponding eNB. For this CDMA data, I really can’t tell if there’s a unique BTS embedded within the CID for if the CID actually represents a unique BTS. Any help/guidance would be greatly appreciated.

Best Regards,

Nick Damenti

Radio, MCC, MNC, Area, CID, Unit, Long, Lat, Range, Samples
CDMA, 311, 870, 313, 20561, -1, -106.461, 31.7812, 1000, 1
CDMA, 310, 120, 240, 20561, -1, -122.197, 47.4491, 1000, 2
CDMA, 310, 120, 5, 20561, 0, -88.2154, 30.5619, 1000, 1
CDMA, 310, 120, 240, 20562, -1, -122.197, 47.4348, 1000, 1
CDMA, 311, 870, 313, 20562, -1, -106.466, 31.7734, 1000, 1
CDMA, 310, 120, 5, 20562, 0, -88.1833, 30.5386, 4665, 5
CDMA, 310, 120, 301, 20562, -1, -85.2134, 32.822, 1000, 1
CDMA, 310, 120, 5, 20563, 0, -88.2425, 30.5432, 3859, 13
CDMA, 311, 870, 313, 20563, -1, -106.466, 31.7734, 1000, 1
CDMA, 310, 120, 301, 20563, -1, -85.3499, 32.6441, 1000, 1
CDMA, 310, 120, 309, 20569, -1, -91.4567, 38.9003, 1000, 1
CDMA, 311, 870, 307, 20569, -1, -81.0031, 29.1638, 1000, 2


#2

Hey Nick,

We always report the approximate BTS position - not cell sector. Sometimes, the last digit represents the sector; but it is not universal rule.


#3

Sagar-

Thanks for your reply. What I’m trying to do is consolidate the data to identify unique ‘towers’, meaning unique eNBs or unique BTSs. I’ve been able to solve the puzzle quite well for LTE, UMTS and GSM, but I’m still a bit puzzled as to how to consolidate CDMA sector information. Any suggestions would be appreciated.

Thanks, Nick


#4

The best approach would be to cluster cells that are close to each other and consider it as being on the same cell tower