Beam directionality errors

A method comprising:

• providing first data indicative of a first relative angle-of-arrival measurement between a first set of base stations, including a first base station and a second base station, from a position of a user device, based on angle-of-arrival measurements made at the user device;
• providing second data indicative of a first angle-of-departure measurement indicative of an angle between the user device and the second base station of the first set of base stations from a position of the first base station, the second data also indicative of a second angle-of-departure measurement indicative of an angle between the user device and the first base station of the first set of base stations from the position of the second base station;
• and
• determining a beam directionality error associated with at least one of the first or second base stations, wherein the determining the beam directionality error is based on the first relative angle-of-arrival measurement and the first and second angle-of-departure measurements.

A non-transitory program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine for performing operations, the operations comprising:

• providing first data indicative of a first relative angle-of-arrival measurement between a first set of base stations, including a first base station and a second base station, from a position of a user device, based on angle-of-arrival measurements made at the user device;
• providing second data indicative of a first angle-of-departure measurement indicative of an angle between the user device and the second base station of the first set of base stations from a position of the first base station, the second data also indicative of a second angle-of-departure measurement indicative of an angle between the user device and the first base station of the first set of base stations from the position of the second base station;
• and
• determining a beam directionality error associated with at least one of the first or second base stations, wherein the determining the beam directionality error is based on the first relative angle-of-arrival measurement and the first and second angle-of-departure measurements.