Exact(14)
The radio fingerprint data contains cell identifiers and signal strength indexes.
Thus, a single grid can have multiple cell identifiers with different signal strength indexes.
For example, 114 pseudonoise sequences are used in WiMAX [25], while 504 physical cell identifiers are used in LTE [26].
By gathering complete radio fingerprint data in the test area, we make a grid map with reference cell identifiers and signal strengths.
A large size radio fingerprint map that shows cell identifiers and signal strength measurements on grid segmentation is built for effective estimation of cell coverage.
If the selection of cell identifiers from the highest RSSI is only a way to set the ref. Cell-ID in all cases, we find many irregularities in the distribution pattern of a ref. Cell-ID.
Similar(46)
We should determine a single cell identifier per grid as a reference cell identifier (ref. Cell-ID) for fingerprint-based cell coverage estimation.
Generally, the cell identifier with the highest RSSI becomes the ref. Cell-ID.
The grid borderline of a specific cell identifier shows the specific cell coverage itself.
Fig. 16 UMTS and GSM serving cell identifier for UMTS (a) and GSM (b) technologies.
The cell identifier is the reference pilot number for 3G WCDMA or physical cell ID for 4G LTE.
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