mirror of https://github.com/PentHertz/srsLTE.git
rlc_am: request status PDU if tx window is half full
The idea behind this condition is to prevent pushing more and more data PDU on the tx_queue without getting feedback from the receiver about it's state.
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@ -406,6 +406,10 @@ bool rlc_am::poll_required()
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if(tx_sdu_queue.size() == 0 && retx_queue.size() == 0)
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return true;
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// Request status if Tx window is half-full
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if (tx_window.size() >= RLC_AM_WINDOW_SIZE/2)
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return true;
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/* According to 5.2.2.1 in 36.322 v13.3.0 a poll should be requested if
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* the entire AM window is unacknowledged, i.e. no new PDU can be transmitted.
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* However, it seems more appropiate to request more often if polling
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