Abstract: A method includes receiving a first message at a router in a mesh network and synchronizing the router to a plurality of time slots using the first message. The method also includes repeatedly incrementing a network reference value at each time slot up to a maximum value and then decrementing the network reference value at each time slot down to a minimum value. In addition, the method includes broadcasting a second message at the router when the network reference value has a specific value that is associated with a unique identifier of the router.

Abstract: A method includes receiving a request to identify any communication paths visible to a first router in a mesh network and broadcasting the request. The method also includes identifying one or more second routers that broadcast information received by the first router, where the one or more identified second routers are associated with the communication paths visible to the first router. The method further includes receiving at least one first response from at least one of the second routers, where the at least one first response identifies the communication paths visible to at least one of the second routers. In addition, the method includes broadcasting a second response at the first router, where the second response identifies the communication paths visible to at least one of the second routers and to the first router.

Abstract: A radio telemetry system has a first transceiver and a large number of further transceivers of which some but not all are out of range of the first transceiver and none of which is out of range of all the others. The first transceiver transmits a radio message having a predetermined format, and each of the further transceivers receiving the message, whether directly or indirectly, re-transmits that message in synchronism or substantially in synchronism with all the other further transceivers which received the message at the same time. Thus, in general, a further transceiver out of range of the first transceiver will receive the message simultaneously from two or more sources. The message contains iteration data which determines the number of times the message is to be re-transmitted.