Repeated Channel Adaptive Frequency Hopping

A method of communication in a frequency hopping wireless network using a time-division duplex (TDD) scheme having a plurality of time slots divided into a plurality of master-to-slave slots and a plurality of slave-to-master slots, wherein the plurality of master-to-slave slots are even slots and the plurality of slave-to-master slots are odd slots, said method comprising:

• coupling an enhanced master device with one or more slave devices;
• communication in the network is initiated by the enhanced master device, which means that the regular slave device or enhanced slave device can only respond with a packet after the enhanced master has sent a packet to the slave device;
• selecting a channel from the original hopping sequence when the master communicates with either a regular slave device or an enhanced slave device;
• selecting a channel from the original hopping sequence when the regular slave device communicates with an enhanced master device;
• selecting a channel a repeated channel adaptive hopping sequence, derived from the original hopping sequence, when an enhanced slave communicates with an enhanced master device, wherein, at any one time instant, only a single device can be transmitting within the network.

A packet for use in a communication system, the packet comprising:

• a channel access code;
• a header;
• a payload;
• and a CRC;
• it is also possible that a guard interval or synchronization sequence may be inserted into the middle of the header)).