1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3 * Copyright (c) 2009 University of Washington
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: Leonard Tracy <lentracy@gmail.com>
19 */
20
21 #include "uan-prop-model.h"
22 #include "ns3/nstime.h"
23 #include <complex>
24 #include <vector>
25
26
27 namespace ns3 {
28
29 std::ostream &
operator <<(std::ostream & os,const UanPdp & pdp)30 operator<< (std::ostream &os, const UanPdp &pdp)
31 {
32 os << pdp.GetNTaps () << '|';
33 os << pdp.GetResolution ().GetSeconds () << '|';
34
35 UanPdp::Iterator it = pdp.m_taps.begin ();
36 for (; it != pdp.m_taps.end (); it++)
37 {
38 os << (*it).GetAmp () << '|';
39 }
40 return os;
41
42 }
43 std::istream &
operator >>(std::istream & is,UanPdp & pdp)44 operator>> (std::istream &is, UanPdp &pdp)
45 {
46 uint32_t ntaps;
47 double resolution;
48 char c1;
49
50 is >> ntaps >> c1;
51 if (c1 != '|')
52 {
53 NS_FATAL_ERROR ("UanPdp data corrupted at # of taps");
54 return is;
55 }
56 is >> resolution >> c1;
57 if (c1 != '|')
58 {
59 NS_FATAL_ERROR ("UanPdp data corrupted at resolution");
60 return is;
61 }
62 pdp.m_resolution = Seconds (resolution);
63
64
65 std::complex<double> amp;
66 pdp.m_taps = std::vector<Tap> (ntaps);
67 for (uint32_t i = 0; i < ntaps && !is.eof (); i++)
68 {
69 is >> amp >> c1;
70 if (c1 != '|')
71 {
72 NS_FATAL_ERROR ("UanPdp data corrupted at tap " << i);
73 return is;
74 }
75 pdp.m_taps[i] = Tap (Seconds (resolution * i), amp);
76 }
77 return is;
78
79 }
80
Tap()81 Tap::Tap ()
82 : m_amplitude (0.0),
83 m_delay (Seconds (0))
84 {
85
86 }
87
Tap(Time delay,std::complex<double> amp)88 Tap::Tap (Time delay, std::complex<double> amp)
89 : m_amplitude (amp),
90 m_delay (delay)
91 {
92
93 }
94
95 std::complex<double>
GetAmp(void) const96 Tap::GetAmp (void) const
97 {
98 return m_amplitude;
99 }
100
101 Time
GetDelay(void) const102 Tap::GetDelay (void) const
103 {
104 return m_delay;
105 }
106
107
UanPdp()108 UanPdp::UanPdp ()
109 {
110
111 }
112
UanPdp(std::vector<Tap> taps,Time resolution)113 UanPdp::UanPdp (std::vector<Tap> taps, Time resolution)
114 : m_taps (taps),
115 m_resolution (resolution)
116 {
117 }
118
UanPdp(std::vector<std::complex<double>> amps,Time resolution)119 UanPdp::UanPdp (std::vector<std::complex<double> > amps, Time resolution)
120 : m_resolution (resolution)
121 {
122 m_taps.resize (amps.size ());
123 Time arrTime = Seconds (0);
124 for (uint32_t index = 0; index < amps.size (); index++)
125 {
126 m_taps[index] = Tap (arrTime, amps[index]);
127 arrTime = arrTime + m_resolution;
128 }
129 }
130
UanPdp(std::vector<double> amps,Time resolution)131 UanPdp::UanPdp (std::vector<double> amps, Time resolution)
132 : m_resolution (resolution)
133 {
134 m_taps.resize (amps.size ());
135 Time arrTime = Seconds (0);
136 for (uint32_t index = 0; index < amps.size (); index++)
137 {
138 m_taps[index] = Tap (arrTime, amps[index]);
139 arrTime = arrTime + m_resolution;
140 }
141 }
142
~UanPdp()143 UanPdp::~UanPdp ()
144 {
145 m_taps.clear ();
146 }
147
148 void
SetTap(std::complex<double> amp,uint32_t index)149 UanPdp::SetTap (std::complex<double> amp, uint32_t index)
150 {
151 if (m_taps.size () <= index)
152 {
153 m_taps.resize (index + 1);
154 }
155
156 Time delay = index * m_resolution;
157 m_taps[index] = Tap (delay, amp);
158 }
159 const Tap &
GetTap(uint32_t i) const160 UanPdp::GetTap (uint32_t i) const
161 {
162 NS_ASSERT_MSG (i < GetNTaps (), "Call to UanPdp::GetTap with requested tap out of range");
163 return m_taps[i];
164 }
165 void
SetNTaps(uint32_t nTaps)166 UanPdp::SetNTaps (uint32_t nTaps)
167 {
168 m_taps.resize (nTaps);
169 }
170 void
SetResolution(Time resolution)171 UanPdp::SetResolution (Time resolution)
172 {
173 m_resolution = resolution;
174 }
175 UanPdp::Iterator
GetBegin(void) const176 UanPdp::GetBegin (void) const
177 {
178 return m_taps.begin ();
179 }
180
181 UanPdp::Iterator
GetEnd(void) const182 UanPdp::GetEnd (void) const
183 {
184 return m_taps.end ();
185 }
186
187 uint32_t
GetNTaps(void) const188 UanPdp::GetNTaps (void) const
189 {
190 return static_cast<uint32_t> (m_taps.size ());
191 }
192
193 Time
GetResolution(void) const194 UanPdp::GetResolution (void) const
195 {
196 return m_resolution;
197 }
198
199 std::complex<double>
SumTapsFromMaxC(Time delay,Time duration) const200 UanPdp::SumTapsFromMaxC (Time delay, Time duration) const
201 {
202 if (m_resolution <= Seconds (0))
203 {
204 NS_ASSERT_MSG (GetNTaps () == 1, "Attempted to sum taps over time interval in "
205 "UanPdp with resolution 0 and multiple taps");
206
207 if (delay.IsZero ()) return m_taps[0].GetAmp ();
208 return std::complex<double> (0.0, 0.0);
209 }
210
211 uint32_t numTaps = (duration / m_resolution + 0.5).GetHigh ();
212 double maxAmp = -1;
213 uint32_t maxTapIndex = 0;
214
215 for (uint32_t i = 0; i < GetNTaps (); i++)
216 {
217 if (std::abs (m_taps[i].GetAmp ()) > maxAmp)
218 {
219 maxAmp = std::abs (m_taps[i].GetAmp ());
220 maxTapIndex = i;
221 }
222 }
223 uint32_t start = maxTapIndex + (delay / m_resolution).GetHigh ();
224 uint32_t end = std::min (start + numTaps, GetNTaps ());
225 std::complex<double> sum = 0;
226 for (uint32_t i = start; i < end; i++)
227 {
228 sum += m_taps[i].GetAmp ();
229 }
230 return sum;
231 }
232 double
SumTapsFromMaxNc(Time delay,Time duration) const233 UanPdp::SumTapsFromMaxNc (Time delay, Time duration) const
234 {
235 if (m_resolution <= Seconds (0))
236 {
237 NS_ASSERT_MSG (GetNTaps () == 1, "Attempted to sum taps over time interval in "
238 "UanPdp with resolution 0 and multiple taps");
239
240 if (delay.IsZero ()) return std::abs (m_taps[0].GetAmp ());
241 return 0;
242 }
243
244 uint32_t numTaps = (duration / m_resolution + 0.5).GetHigh ();
245 double maxAmp = -1;
246 uint32_t maxTapIndex = 0;
247
248 for (uint32_t i = 0; i < GetNTaps (); i++)
249 {
250 if (std::abs (m_taps[i].GetAmp ()) > maxAmp)
251 {
252 maxAmp = std::abs (m_taps[i].GetAmp ());
253 maxTapIndex = i;
254 }
255 }
256
257
258 uint32_t start = maxTapIndex + (delay / m_resolution).GetHigh ();
259 uint32_t end = std::min (start + numTaps, GetNTaps ());
260 double sum = 0;
261 for (uint32_t i = start; i < end; i++)
262
263 {
264 sum += std::abs (m_taps[i].GetAmp ());
265 }
266 return sum;
267 }
268 double
SumTapsNc(Time begin,Time end) const269 UanPdp::SumTapsNc (Time begin, Time end) const
270 {
271 if (m_resolution <= Seconds (0))
272 {
273 NS_ASSERT_MSG (GetNTaps () == 1, "Attempted to sum taps over time interval in "
274 "UanPdp with resolution 0 and multiple taps");
275
276 if (begin <= Seconds (0.0) && end >= Seconds (0.0))
277 {
278 return std::abs (m_taps[0].GetAmp ());
279 }
280 else
281 {
282 return 0.0;
283 }
284 }
285
286 uint32_t stIndex = (begin / m_resolution + 0.5).GetHigh ();
287 uint32_t endIndex = (end / m_resolution + 0.5).GetHigh ();
288
289 endIndex = std::min (endIndex, GetNTaps ());
290 double sum = 0;
291 for (uint32_t i = stIndex; i < endIndex; i++)
292 {
293 sum += std::abs (m_taps[i].GetAmp ());
294 }
295 return sum;
296
297 }
298
299
300
301 std::complex<double>
SumTapsC(Time begin,Time end) const302 UanPdp::SumTapsC (Time begin, Time end) const
303 {
304 if (m_resolution <= Seconds (0))
305 {
306 NS_ASSERT_MSG (GetNTaps () == 1, "Attempted to sum taps over time interval in "
307 "UanPdp with resolution 0 and multiple taps");
308
309 if (begin <= Seconds (0.0) && end >= Seconds (0.0))
310 {
311 return m_taps[0].GetAmp ();
312 }
313 else
314 {
315 return std::complex<double> (0.0);
316 }
317 }
318
319 uint32_t stIndex = (begin / m_resolution + 0.5).GetHigh ();
320 uint32_t endIndex = (end / m_resolution + 0.5).GetHigh ();
321
322 endIndex = std::min (endIndex, GetNTaps ());
323
324 std::complex<double> sum = 0;
325 for (uint32_t i = stIndex; i < endIndex; i++)
326 {
327 sum += m_taps[i].GetAmp ();
328 }
329 return sum;
330 }
331
332 UanPdp
NormalizeToSumNc(void) const333 UanPdp::NormalizeToSumNc (void) const
334 {
335 double sumNc = 0.0;
336 std::vector<Tap> newTaps;
337
338 for (uint32_t i = 0; i < GetNTaps (); i++)
339 {
340 sumNc += std::abs (m_taps[i].GetAmp ());
341 }
342
343 for (uint32_t i = 0; i < GetNTaps (); i++)
344 {
345 newTaps.push_back ( Tap (m_taps[i].GetDelay (), (m_taps[i].GetAmp () / sumNc)));
346 }
347
348 return UanPdp (newTaps, m_resolution);
349 }
350
351 UanPdp
CreateImpulsePdp(void)352 UanPdp::CreateImpulsePdp (void)
353 {
354 UanPdp pdp;
355 pdp.SetResolution (Seconds (0));
356 pdp.SetTap (1.0,0);
357 return pdp;
358 }
359
360 NS_OBJECT_ENSURE_REGISTERED (UanPropModel);
361
GetTypeId(void)362 TypeId UanPropModel::GetTypeId (void)
363 {
364 static TypeId tid = TypeId ("ns3::UanPropModel")
365 .SetParent<Object> ()
366 .SetGroupName ("Uan")
367 ;
368 return tid;
369 }
370
371 void
Clear(void)372 UanPropModel::Clear (void)
373 {
374 }
375
376 void
DoDispose(void)377 UanPropModel::DoDispose (void)
378 {
379 Clear ();
380 Object::DoDispose ();
381 }
382
383 }
384