mirror of https://github.com/PentHertz/srsLTE.git
Delay application of time_adv by 1 subframe
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5ab0149218
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@ -425,7 +425,7 @@ private:
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// This is the primary cell
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srslte_cell_t cell;
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bool started;
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float time_adv_sec;
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float time_adv_sec, next_time_adv_sec;
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uint32_t tti;
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bool do_agc;
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@ -453,6 +453,9 @@ void phch_recv::run_thread()
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worker->set_tti(tti, tx_mutex_cnt);
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worker->set_tx_time(tx_time, next_offset);
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next_offset = 0;
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if (next_time_adv_sec != time_adv_sec) {
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time_adv_sec = next_time_adv_sec;
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}
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tx_mutex_cnt = (tx_mutex_cnt+1) % nof_tx_mutex;
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// Advance/reset prach subframe pointer
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@ -614,8 +617,11 @@ void phch_recv::set_agc_enable(bool enable)
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void phch_recv::set_time_adv_sec(float time_adv_sec)
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{
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this->time_adv_sec = time_adv_sec;
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next_offset = -time_adv_sec*srslte_sampling_freq_hz(cell.nof_prb);
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// If transmitting earlier, transmit less samples to align time advance. If transmit later just delay next TX
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if (time_adv_sec > this->time_adv_sec) {
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next_offset = -floor(time_adv_sec*srslte_sampling_freq_hz(cell.nof_prb)+1);
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}
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this->next_time_adv_sec = time_adv_sec;
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Info("Applying time_adv_sec=%.1f us, next_offset=%d\n", time_adv_sec*1e6, next_offset);
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}
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