A Discrete-Event Network Simulator
API
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lr-wpan-error-model.cc
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1/*
2 * Copyright (c) 2011 The Boeing Company
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation;
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 *
17 * Author: Gary Pei <guangyu.pei@boeing.com>
18 */
19#include "lr-wpan-error-model.h"
20
21#include <ns3/log.h>
22
23#include <cmath>
24
25namespace ns3
26{
27
28NS_LOG_COMPONENT_DEFINE("LrWpanErrorModel");
29
30NS_OBJECT_ENSURE_REGISTERED(LrWpanErrorModel);
31
32TypeId
34{
35 static TypeId tid = TypeId("ns3::LrWpanErrorModel")
37 .SetGroupName("LrWpan")
38 .AddConstructor<LrWpanErrorModel>();
39 return tid;
40}
41
43{
47 m_binomialCoefficients[3] = -560;
48 m_binomialCoefficients[4] = 1820;
49 m_binomialCoefficients[5] = -4368;
50 m_binomialCoefficients[6] = 8008;
51 m_binomialCoefficients[7] = -11440;
52 m_binomialCoefficients[8] = 12870;
53 m_binomialCoefficients[9] = -11440;
54 m_binomialCoefficients[10] = 8008;
55 m_binomialCoefficients[11] = -4368;
56 m_binomialCoefficients[12] = 1820;
57 m_binomialCoefficients[13] = -560;
58 m_binomialCoefficients[14] = 120;
59 m_binomialCoefficients[15] = -16;
61}
62
63double
65{
66 double ber = 0.0;
67
68 for (uint32_t k = 2; k <= 16; k++)
69 {
70 ber += m_binomialCoefficients[k] * exp(20.0 * snr * (1.0 / k - 1.0));
71 }
72
73 ber = ber * 8.0 / 15.0 / 16.0;
74
75 ber = std::min(ber, 1.0);
76 double retval = pow(1.0 - ber, nbits);
77 return retval;
78}
79
80} // namespace ns3
Model the error rate for IEEE 802.15.4 2.4 GHz AWGN channel for OQPSK the model description can be fo...
double m_binomialCoefficients[17]
Array of precalculated binomial coefficients.
double GetChunkSuccessRate(double snr, uint32_t nbits) const
Return chunk success rate for given SNR.
static TypeId GetTypeId()
Get the type ID.
A base class which provides memory management and object aggregation.
Definition: object.h:89
a unique identifier for an interface.
Definition: type-id.h:59
TypeId SetParent(TypeId tid)
Set the parent TypeId.
Definition: type-id.cc:932
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition: log.h:202
#define NS_OBJECT_ENSURE_REGISTERED(type)
Register an Object subclass with the TypeId system.
Definition: object-base.h:46
Every class exported by the ns3 library is enclosed in the ns3 namespace.