Index: src/internet/model/tcp-highspeed.h |
diff --git a/src/internet/model/tcp-highspeed.h b/src/internet/model/tcp-highspeed.h |
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
+/* |
+ * Copyright (c) 2014 Natale Patriciello, <natale.patriciello@gmail.com> |
+ * |
+ * This program is free software; you can redistribute it and/or modify |
+ * it under the terms of the GNU General Public License version 2 as |
+ * published by the Free Software Foundation; |
+ * |
+ * This program is distributed in the hope that it will be useful, |
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of |
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
+ * GNU General Public License for more details. |
+ * |
+ * You should have received a copy of the GNU General Public License |
+ * along with this program; if not, write to the Free Software |
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
+ * |
+ */ |
+ |
+#ifndef TCPHIGHSPEED_H |
+#define TCPHIGHSPEED_H |
+ |
+#include "ns3/tcp-newreno.h" |
+ |
+namespace ns3 { |
+ |
+/** |
+ * \ingroup tcp |
+ * |
+ * \brief An implementation of TCP HighSpeed |
+ * |
+ * TCP HighSpeed is designed for high-capacity channels or, in general, for |
+ * TCP connections with large congestion windows. |
+ * Conceptually, with respect to the standard TCP, HighSpeed makes the |
+ * cWnd grow faster during the probing phases and accelerates the |
+ * cWnd recovery from losses. |
+ * This behavior is executed only when the window grows beyond a |
+ * certain threshold, which allows TCP Highspeed to be friendly with standard |
+ * TCP in environments with heavy congestion, without introducing new dangers |
+ * of congestion collapse. |
+ * At the core of TCP HighSpeed there are two functions, a(w) and b(w), which respectively |
+ * specify the cWnd growth addendum and the cWnd reduction factor when |
+ * given an actual cWnd value w. |
+ * |
+ * More information: http://dl.acm.org/citation.cfm?id=2756518 |
+ */ |
+class TcpHighSpeed : public TcpNewReno |
+{ |
+public: |
+ /** |
+ * \brief Get the type ID. |
+ * \return the object TypeId |
+ */ |
+ static TypeId GetTypeId (void); |
+ |
+ /** |
+ * Create an unbound tcp socket. |
+ */ |
+ TcpHighSpeed (void); |
+ |
+ /** |
+ * \brief Copy constructor |
+ * \param sock the object to copy |
+ */ |
+ TcpHighSpeed (const TcpHighSpeed& sock); |
+ |
+ virtual ~TcpHighSpeed (void); |
+ |
+protected: |
+ virtual Ptr<TcpSocketBase> Fork (void); |
+ virtual void NewAck (SequenceNumber32 const& seq); |
+ virtual void DupAck (const TcpHeader& t, uint32_t count); |
+ virtual void Retransmit (void); |
+ |
+private: |
+ /** |
+ * \brief Lookup table for the coefficent a (from RFC 3649) |
+ * |
+ * \param w Window value (in packets) |
+ * |
+ * \return the coefficent a |
+ */ |
+ uint32_t TableLookupA (uint32_t w); |
+ |
+ /** |
+ * \brief Lookup table for the coefficent b (from RFC 3649) |
+ * |
+ * \param w Window value (in packets) |
+ * |
+ * \return the coefficent b |
+ */ |
+ double TableLookupB (uint32_t w); |
+ |
+ /** |
+ * \brief Update cWnd and ssTh after a loss event |
+ * |
+ */ |
+ void Loss (); |
+}; |
+ |
+} // namespace ns3 |
+ |
+#endif // TCPHIGHSPEED_H |