From 2cee65bb889dd890fb3571d69f1de349341b2e55 Mon Sep 17 00:00:00 2001
From: Andre Puschmann <andre@softwareradiosystems.com>
Date: Fri, 22 Oct 2021 10:31:19 +0200
Subject: [PATCH] enb,slot_worker: skip UL signal demod if scheduler returns
 empty results

---
 srsenb/src/phy/nr/slot_worker.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/srsenb/src/phy/nr/slot_worker.cc b/srsenb/src/phy/nr/slot_worker.cc
index bbe96fca7..a5453e47a 100644
--- a/srsenb/src/phy/nr/slot_worker.cc
+++ b/srsenb/src/phy/nr/slot_worker.cc
@@ -148,6 +148,11 @@ bool slot_worker::work_ul()
     return false;
   }
 
+  if (ul_sched.pucch.empty() && ul_sched.pusch.empty()) {
+    // early exit if nothing has been scheduled
+    return true;
+  }
+
   // Demodulate
   if (srsran_gnb_ul_fft(&gnb_ul) < SRSRAN_SUCCESS) {
     logger.error("Error in demodulation");