Patent ID: 11871366
Assignee: VIAVI SOLUTIONS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 7:
8. A test device operable to test timing synchronization between neighboring clusters in a cellular network, comprising:
a power source;
a data storage;
a display;
a Global Navigation Satellite System (GNSS) receiver to:
enter a timing mode to generate a one pulse per second (1PPS) reference signal based on G1PPS reference signal;

a radio to transmit and receive over the air signals;
a processor to:
measure, for each of a plurality of measurement locations within a predetermined boundary area between the neighboring dusters, physical cell identities (PCIs) and time error offsets based on synchronization signals received via the radio from a plurality of base stations in neighboring dusters at each measurement location,
wherein each time error offset is an offset between a start of a frame for a cell and the 1PPS reference signal;
store the measured PCIs and time error offsets for each measurement location in the data storage;
determine a primary PCI from the PCIs for the measurement locations;
calculate a sync error fro differences between the time error offsets for the primary PCI and remaining PCIs of the PCIs for each measurement location;
determine whether the sync error is within a predetermined threshold for each measurement location; and
generate a graphical user interface (GUI) on the display based on whether the sync error is within the predetermined threshold for each measurement location,
wherein the GUI comprises:
a map and a point on the map for each measurement location;
a table showing the PCIS, the time error offsets, and the sync error for each measurement location; and
an indicator in at least one of the table and the map that indicates whether the sync error is within the predetermined threshold for each measurement location.