Communication system and method of operation

A method (300) of operating a communication system (10) configured to communicate receiver-specific information (26) from a transmitter (18) to a plurality of receivers, wherein each of the receivers is assigned to one of a plurality of groups based on a group identification value stored in each receiver, wherein the transmitter (18) is configured to transmit periodically a time-reference signal (24) and the receiver-specific information (26), wherein information for a first receiver group (12A) is transmitted during a first information-expected time interval (34A) that is determined based on a reception time (36) of a time-reference signal (24) and a first group identification value (42A), and information for a second receiver group (12B) is transmitted during a second information-expected time interval (34B) that is determined based on the reception time (36) of the time-reference signal (24) and a second group identification value (42B), wherein the second information-expected time interval (34B) is distinct from the first information-expected time interval (34A), said method (300) comprising:

• determining a receiver identification value of a first receiver group (12A) and a second receiver group (12B) of the system (10);
• operating the first receiver group (12A) and the second receiver group (12B) to determine the reception time (36);
• operating the first receiver group (12A) during the first information-expected time interval (34A) to receive receiver-specific information (26) if the receiver identification value corresponds to the first group identification value (42A);
• and
• operating the second receiver group (12B) during the second information-expected time interval (34B) to receive receiver-specific information (26) if the receiver identification value corresponds to the second group identification value (42B).