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spectrum-error-model.cc
1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2009 CTTC
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation;
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  *
18  * Author: Nicola Baldo <nbaldo@cttc.es>
19  */
20 
21 #include "spectrum-error-model.h"
22 
23 #include <ns3/nstime.h>
24 #include <ns3/log.h>
25 
26 NS_LOG_COMPONENT_DEFINE ("ShannonSpectrumErrorModel");
27 
28 namespace ns3 {
29 
30 SpectrumErrorModel::~SpectrumErrorModel ()
31 {
32 }
33 
34 void
36 {
37  NS_LOG_FUNCTION (this);
39 }
40 
41 void
42 ShannonSpectrumErrorModel::StartRx (Ptr<const Packet> p)
43 {
44  NS_LOG_FUNCTION (this);
45  m_bytes = p->GetSize ();
46  NS_LOG_LOGIC ("bytes to deliver: " << m_bytes);
47  m_deliverableBytes = 0;
48 }
49 
50 void
51 ShannonSpectrumErrorModel::EvaluateChunk (const SpectrumValue& sinr, Time duration)
52 {
53  NS_LOG_FUNCTION (this << sinr << duration);
54  SpectrumValue CapacityPerHertz = Log2 (1 + sinr);
55  double capacity = 0;
56 
57  Bands::const_iterator bi = CapacityPerHertz.ConstBandsBegin ();
58  Values::const_iterator vi = CapacityPerHertz.ConstValuesBegin ();
59 
60  while (bi != CapacityPerHertz.ConstBandsEnd ())
61  {
62  NS_ASSERT (vi != CapacityPerHertz.ConstValuesEnd ());
63  capacity += (bi->fh - bi->fl) * (*vi);
64  ++bi;
65  ++vi;
66  }
67  NS_ASSERT (vi == CapacityPerHertz.ConstValuesEnd ());
68  NS_LOG_LOGIC ("ChunkCapacity = " << capacity);
69  m_deliverableBytes += static_cast<uint32_t> (capacity * duration.GetSeconds () / 8);
70  NS_LOG_LOGIC ("DeliverableBytes = " << m_deliverableBytes);
71 }
72 
73 
74 bool
75 ShannonSpectrumErrorModel::IsRxCorrect ()
76 {
77  NS_LOG_FUNCTION (this);
78  return (m_deliverableBytes > m_bytes);
79 }
80 
81 
82 } // namespace ns3
#define NS_LOG_FUNCTION(parameters)
Definition: log.h:311
#define NS_ASSERT(condition)
Definition: assert.h:64
#define NS_LOG_COMPONENT_DEFINE(name)
Definition: log.h:122
uint32_t GetSize(void) const
Definition: packet.h:620
virtual void DoDispose(void)
Definition: object.cc:335
#define NS_LOG_LOGIC(msg)
Definition: log.h:334
SpectrumValue Log2(const SpectrumValue &arg)