lbt_period

uint32_t nrf_modem_dect_phy_tx_params::lbt_period

Listen before talk period in modem time units.

This is the required time during which the channel must be assessed as “free” or “available” before transmission begins. The assessment is completed prior to the transmission start time, which is fixed and independent of the assessment duration.

The duration is divided into a maximum of 64 separate integration periods, with each period being a multiple of the symbol duration. Each integration period is of equal length, up to a maximum of 7 symbols.

The maximum number of integration periods is utilized. For instance, LBT durations of up to 64 symbols are divided into integration periods of one symbol each, and LBT durations of 65-128 symbols are divided into two-symbol integration periods. The LBT duration may be adjusted slightly to meet these requirements without exceeding the specified LBT length, for example, a duration of 71 symbols would be adjusted to 70 symbols (35 periods of 2 symbols each).

If the channel is initially found to be "busy," the modem will cease further measurement of the channel and will report an error instead. It is then the responsibility of the higher layer to reschedule the transmission.

If set to zero, LBT is not used. Otherwise the acceptable value range is [NRF_MODEM_DECT_LBT_PERIOD_MIN, NRF_MODEM_DECT_LBT_PERIOD_MAX].