Abstract: A wireless sensor device for wireless transmission of sensed medical data to a medical monitoring and/or intervention device. The sensor device has a sensor element for sensing a physical parameter related to a body of a living person or animal. A wireless RF transmitter and receiver serves to transmit data packets with the sensed physical parameter, and to also receive data packets, in accordance with a TDMA based network protocol. A processor system controls operation of the wireless RF transmitter and receiver, including that the sensor device can operate as wireless RF synchronization master or slave, and the sensor device can negotiate according to a deterministic negotiation algorithm to appoint one of a plurality of wireless RF devices connected to the TDMA based network as wireless RF synchronization master, if it is detected that no master is available.

Abstract: A wireless communication method and protocol for wireless RF transmission of duplex audio in a flexible and self organizing network, especially audio data packets may be communicated according to a DECT protocol. Each wireless RF device is arranged to operate as a synchronization master or a synchronization slave, and where a negotiation algorithm is used to negotiate with other wireless RF devices present within wireless range to determine roles of master and slave(s). This allow wireless RF devices to leave or join groups of wireless RF devices within wireless range of each other, and still the synchronization master role is negotiated, and only one synchronization master is selected, whereas the remaining wireless RF devices will operate as synchronization slaves. Each wireless RF device performs a scanning of supported RF frequencies or channels to detect other wireless RF devices within wireless range.