Ambient communication devices and methods for use thereof

A system comprising:

• a device;
• and
• a reader;
• wherein the reader is configured to receive an energy parameter, from the device, in a transmission from the device to the reader;
• wherein the reader is configured to receive assistance information about the device independently from the device and from another device, wherein the assistance information comprises at least a message size of the device;
• wherein the device and the reader are configured to communicate according to at least one application layer identifier, which is configured to be of at least two different lengths, wherein the at least two different lengths include a full length and a partial length;
• wherein the application layer identifier has a random portion;
• wherein a sequence number is not employed;
• wherein modulation methods include one or both of On-Off Keying (OOK) and Phase Shift Keying (PSK).

A method performed by a wireless device in communication with a reader, the method comprising:

• transmitting an energy parameter, to the reader, using one modulation method of the group consisting of On-Off Keying (OOK) and Phase Shift Keying (PSK);
• transmitting assistance information, to the reader, wherein the assistance information comprises at least a message size pertaining to the device;
• and
• transmitting a message, having a cyclic prefix, wherein the message is consistent with the message size, on a bandwidth negotiated between the wireless device and the reader.