[Wireless M-Bus] “The W MBus network will contain repeaters to transmit data from 868 MHz to 169 MHz. We want repeaters in Battery operated mode. 1. We plan to put Repeaters in long sleep mode and arrival of packet from nodes would wake Repeater. This design would be similar to Data collector/Concentrator design envisaged in Wireless M Bus specs. Alternatively we can design time synchronized wake-up algorithm so that all nodes wake up at the same time (including repeater) and after data transmission, all nodes go back to sleep mode. What would you recommend?”