Radio communication method and apparatus for generating data channel access addresses

A method of communicating by radio, comprising:

• receiving or generating a base address seed;
• generating a set of one or more data-channel access addresses from the base address seed, each said data-channel access address corresponding to a respective data-channel identifier from a set of one or more data-channel identifiers, wherein each data-channel identifier of the set of one or more data-channel identifiers is equal to a respective channel number, from a corresponding sequence of one or more successive integer channel numbers, multiplied by a first value, plus a non-zero summand, modulo a second value, concatenated with one or more additional bits, and wherein the generating of each access address comprises:
• setting the value of a bit at a common first bit position in the respective access address to be equal to the value of a bit at a first common predetermined bit position in the base address seed or in the respective data-channel identifier;
• setting the value of a bit at a common second bit position in the respective access address to be equal to the bitwise complement of the value of the bit at said first common predetermined bit position in the base address seed or in the respective data-channel identifier;
• and
• setting the values of one or more bits at one or more of the remaining bit positions in the respective access address in dependence on values of one or more bits at one or more bit positions in the base address seed and one or more bit positions in the respective data-channel identifier that are not said first common predetermined bit position in the base address seed or in the respective data-channel identifier;
• and
• sending or receiving a radio data packet comprising an access address from the generated set of data-channel access addresses, according to a predetermined radio protocol.

A radio communication apparatus, comprising:

• a radio transceiver;
• and
• a processing system comprising hardware logic, or comprising a processor and a memory storing software instructions for execution by the processor,
• wherein:
• the apparatus is configured to receive or generate a base address seed that satisfies a condition that a sequence of bit values having a predetermined length and a predetermined position in the base address seed contains no more than a threshold number of bit-value transitions between adjacent bits in the sequence;
• and
• the processing system is configured to generate a set of one or more data-channel access addresses from the base address seed, each said data-channel access address corresponding to a respective data-channel identifier from a set of one or more data-channel identifiers, wherein each data-channel identifier of the set of one or more data-channel identifiers is equal to a respective channel number, from a corresponding sequence of one or more successive integer channel numbers, multiplied by a first value, plus a non-zero summand, modulo a second value, concatenated with one or more additional bits, and wherein the generating of each access address comprises:
• xor′ing each bit value of said sequence of bit values in the base address seed with a binary value derived from the respective data-channel identifier so as to generate a modified sequence of bit values, and
• setting a sequence of bits in the respective access address to be equal to said modified sequence;
• and
• the radio transceiver is configured to send or receive a radio data packet comprising an access address from the generated set of data-channel access addresses, according to a predetermined radio protocol.