diff --git a/quic/core/congestion_control/bbr2_sender.cc b/quic/core/congestion_control/bbr2_sender.cc
index e8009aa..f176ff6 100644
--- a/quic/core/congestion_control/bbr2_sender.cc
+++ b/quic/core/congestion_control/bbr2_sender.cc
@@ -114,6 +114,11 @@
   return params_.cwnd_limits;
 }
 
+void Bbr2Sender::AdjustNetworkParameters(const NetworkParams& params) {
+  AdjustNetworkParameters(params.bandwidth, params.rtt,
+                          params.allow_cwnd_to_decrease);
+}
+
 void Bbr2Sender::AdjustNetworkParameters(QuicBandwidth bandwidth,
                                          QuicTime::Delta rtt,
                                          bool allow_cwnd_to_decrease) {
diff --git a/quic/core/congestion_control/bbr2_sender.h b/quic/core/congestion_control/bbr2_sender.h
index 74efc89..6d0f338 100644
--- a/quic/core/congestion_control/bbr2_sender.h
+++ b/quic/core/congestion_control/bbr2_sender.h
@@ -47,6 +47,7 @@
   void SetFromConfig(const QuicConfig& config,
                      Perspective perspective) override;
 
+  void AdjustNetworkParameters(const NetworkParams& params) override;
   void AdjustNetworkParameters(QuicBandwidth bandwidth,
                                QuicTime::Delta rtt,
                                bool allow_cwnd_to_decrease) override;
diff --git a/quic/core/congestion_control/bbr_sender.cc b/quic/core/congestion_control/bbr_sender.cc
index 1ba6b42..b9a259a 100644
--- a/quic/core/congestion_control/bbr_sender.cc
+++ b/quic/core/congestion_control/bbr_sender.cc
@@ -324,6 +324,11 @@
   }
 }
 
+void BbrSender::AdjustNetworkParameters(const NetworkParams& params) {
+  AdjustNetworkParameters(params.bandwidth, params.rtt,
+                          params.allow_cwnd_to_decrease);
+}
+
 void BbrSender::AdjustNetworkParameters(QuicBandwidth bandwidth,
                                         QuicTime::Delta rtt,
                                         bool allow_cwnd_to_decrease) {
diff --git a/quic/core/congestion_control/bbr_sender.h b/quic/core/congestion_control/bbr_sender.h
index b4baa2f..a128797 100644
--- a/quic/core/congestion_control/bbr_sender.h
+++ b/quic/core/congestion_control/bbr_sender.h
@@ -105,6 +105,7 @@
   void SetFromConfig(const QuicConfig& config,
                      Perspective perspective) override;
 
+  void AdjustNetworkParameters(const NetworkParams& params) override;
   void AdjustNetworkParameters(QuicBandwidth bandwidth,
                                QuicTime::Delta rtt,
                                bool allow_cwnd_to_decrease) override;
diff --git a/quic/core/congestion_control/send_algorithm_interface.h b/quic/core/congestion_control/send_algorithm_interface.h
index 4f84f13..cde23b1 100644
--- a/quic/core/congestion_control/send_algorithm_interface.h
+++ b/quic/core/congestion_control/send_algorithm_interface.h
@@ -31,6 +31,20 @@
 
 class QUIC_EXPORT_PRIVATE SendAlgorithmInterface {
  public:
+  // Network Params for AdjustNetworkParameters.
+  struct QUIC_NO_EXPORT NetworkParams {
+    NetworkParams()
+        : bandwidth(QuicBandwidth::Zero()),
+          rtt(QuicTime::Delta::Zero()),
+          allow_cwnd_to_decrease(false) {}
+    NetworkParams(NetworkParams&& params) = default;
+    NetworkParams& operator=(NetworkParams&& params) = default;
+
+    QuicBandwidth bandwidth;
+    QuicTime::Delta rtt;
+    bool allow_cwnd_to_decrease;
+  };
+
   static SendAlgorithmInterface* Create(
       const QuicClock* clock,
       const RttStats* rtt_stats,
@@ -115,6 +129,9 @@
   // Notifies the congestion control algorithm of an external network
   // measurement or prediction.  Either |bandwidth| or |rtt| may be zero if no
   // sample is available.
+  virtual void AdjustNetworkParameters(const NetworkParams& params) = 0;
+  // TODO(b/143891040): Replace old interface with the new one that uses
+  // NetworkParams.
   virtual void AdjustNetworkParameters(QuicBandwidth bandwidth,
                                        QuicTime::Delta rtt,
                                        bool allow_cwnd_to_decrease) = 0;
diff --git a/quic/core/congestion_control/tcp_cubic_sender_bytes.cc b/quic/core/congestion_control/tcp_cubic_sender_bytes.cc
index 28f284e..c26656f 100644
--- a/quic/core/congestion_control/tcp_cubic_sender_bytes.cc
+++ b/quic/core/congestion_control/tcp_cubic_sender_bytes.cc
@@ -105,6 +105,10 @@
   }
 }
 
+void TcpCubicSenderBytes::AdjustNetworkParameters(const NetworkParams& params) {
+  AdjustNetworkParameters(params.bandwidth, params.rtt,
+                          params.allow_cwnd_to_decrease);
+}
 void TcpCubicSenderBytes::AdjustNetworkParameters(
     QuicBandwidth bandwidth,
     QuicTime::Delta rtt,
diff --git a/quic/core/congestion_control/tcp_cubic_sender_bytes.h b/quic/core/congestion_control/tcp_cubic_sender_bytes.h
index 50f7981..c78d5d8 100644
--- a/quic/core/congestion_control/tcp_cubic_sender_bytes.h
+++ b/quic/core/congestion_control/tcp_cubic_sender_bytes.h
@@ -46,6 +46,7 @@
   // Start implementation of SendAlgorithmInterface.
   void SetFromConfig(const QuicConfig& config,
                      Perspective perspective) override;
+  void AdjustNetworkParameters(const NetworkParams& params) override;
   void AdjustNetworkParameters(QuicBandwidth bandwidth,
                                QuicTime::Delta rtt,
                                bool allow_cwnd_to_decrease) override;
diff --git a/quic/core/quic_connection.cc b/quic/core/quic_connection.cc
index adbca34..7258ec5 100644
--- a/quic/core/quic_connection.cc
+++ b/quic/core/quic_connection.cc
@@ -510,6 +510,11 @@
   sent_packet_manager_.SetMaxPacingRate(max_pacing_rate);
 }
 
+void QuicConnection::AdjustNetworkParameters(
+    const SendAlgorithmInterface::NetworkParams& params) {
+  sent_packet_manager_.AdjustNetworkParameters(params);
+}
+
 void QuicConnection::AdjustNetworkParameters(QuicBandwidth bandwidth,
                                              QuicTime::Delta rtt,
                                              bool allow_cwnd_to_decrease) {
diff --git a/quic/core/quic_connection.h b/quic/core/quic_connection.h
index d858e3a..b5cf6fb 100644
--- a/quic/core/quic_connection.h
+++ b/quic/core/quic_connection.h
@@ -362,6 +362,8 @@
 
   // Allows the client to adjust network parameters based on external
   // information.
+  void AdjustNetworkParameters(
+      const SendAlgorithmInterface::NetworkParams& params);
   void AdjustNetworkParameters(QuicBandwidth bandwidth,
                                QuicTime::Delta rtt,
                                bool allow_cwnd_to_decrease);
diff --git a/quic/core/quic_sent_packet_manager.cc b/quic/core/quic_sent_packet_manager.cc
index deec82f..c8c870b 100644
--- a/quic/core/quic_sent_packet_manager.cc
+++ b/quic/core/quic_sent_packet_manager.cc
@@ -312,6 +312,12 @@
 }
 
 void QuicSentPacketManager::AdjustNetworkParameters(
+    const SendAlgorithmInterface::NetworkParams& params) {
+  AdjustNetworkParameters(params.bandwidth, params.rtt,
+                          params.allow_cwnd_to_decrease);
+}
+
+void QuicSentPacketManager::AdjustNetworkParameters(
     QuicBandwidth bandwidth,
     QuicTime::Delta rtt,
     bool allow_cwnd_to_decrease) {
diff --git a/quic/core/quic_sent_packet_manager.h b/quic/core/quic_sent_packet_manager.h
index 2c3cf99..95b9ee2 100644
--- a/quic/core/quic_sent_packet_manager.h
+++ b/quic/core/quic_sent_packet_manager.h
@@ -151,6 +151,8 @@
   void AdjustNetworkParameters(QuicBandwidth bandwidth,
                                QuicTime::Delta rtt,
                                bool allow_cwnd_to_decrease);
+  void AdjustNetworkParameters(
+      const SendAlgorithmInterface::NetworkParams& params);
 
   // Retransmits the oldest pending packet there is still a tail loss probe
   // pending.  Invoked after OnRetransmissionTimeout.
diff --git a/quic/test_tools/quic_test_utils.h b/quic/test_tools/quic_test_utils.h
index eb3d2e8..f428e87 100644
--- a/quic/test_tools/quic_test_utils.h
+++ b/quic/test_tools/quic_test_utils.h
@@ -948,6 +948,7 @@
   MOCK_CONST_METHOD0(GetCongestionControlType, CongestionControlType());
   MOCK_METHOD3(AdjustNetworkParameters,
                void(QuicBandwidth, QuicTime::Delta, bool));
+  MOCK_METHOD1(AdjustNetworkParameters, void(const NetworkParams&));
   MOCK_METHOD1(OnApplicationLimited, void(QuicByteCount));
 };