Power saving for non-trigger-based ranging

An apparatus, comprising:

• a memory;
• and
• at least one processor in communication with the memory, wherein the at least one processor is configured to:
• negotiate one or more timing parameters associated with a ranging procedure, wherein the one or more timing parameters indicate a time duration during which an initiating device can initiate a ranging measurement, wherein the one or more timing parameters are based, at least in part, on time limits on storing timestamps;
• receive, from a neighboring wireless device, an announcement indicating initiation of a first ranging measurement associated with the ranging procedure;
• receive at a first time, a first measurement packet from the neighboring wireless device;
• generate instructions to transmit, at a second time, a second measurement packet to the neighboring wireless device;
• generate instructions to transmit, at a third time, a first report to the neighboring wireless device, wherein the first report is associated with the ranging procedure;
• and
• receive, after completion of the first ranging measurement, a message announcing initiation of a second ranging measurement associated with the ranging procedure, wherein the message is received during the time duration indicated by the one or more timing parameters.

A non-transitory computer readable memory medium storing program instructions executable by processing circuitry of a wireless device to:

• negotiate one or more timing parameters associated with a ranging procedure comprising at least one ranging measurement, wherein the one or more timing parameters indicate a time window during which an initiating device can initiate a ranging measurement, and wherein the one or more timing parameters are based, at least in part, on a time required to process timestamps of a measurement round or time limits on storing timestamps;
• receive, from a neighboring wireless device, an announcement indicating initiation of a first ranging measurement associated with the ranging procedure;
• receive at a first time, a first measurement packet from the neighboring wireless device;
• transmit, at a second time, a second measurement packet to the neighboring wireless device;
• transmit, at a third time, a first report to the neighboring wireless device, wherein the first report is associated with the ranging procedure;
• and
• receive, after completion of the first ranging measurement, a message announcing initiation of a second ranging measurement of the ranging procedure, wherein the message is received during the time window indicated by the one or more timing parameters.