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lte: Add LteSpectrumValueHelper::Get{Downlink, Uplink}CarrierBand

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This commit is contained in:
Alexander Krotov
2017-07-04 04:05:36 +03:00
parent 86259aa901
commit e9ba48da92
2 changed files with 56 additions and 14 deletions
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48
src/lte/model/lte-spectrum-value-helper.cc
View File

@@ -114,38 +114,62 @@ LteSpectrumValueHelper::GetCarrierFrequency (uint32_t earfcn)
}
}
double
LteSpectrumValueHelper::GetDownlinkCarrierFrequency (uint32_t nDl)
uint16_t
LteSpectrumValueHelper::GetDownlinkCarrierBand (uint32_t nDl)
{
NS_LOG_FUNCTION (nDl);
for (uint16_t i = 0; i < NUM_EUTRA_BANDS; ++i)
{
if ((g_eutraChannelNumbers[i].rangeNdl1 <= nDl)
&& (g_eutraChannelNumbers[i].rangeNdl2 >= nDl))
if (g_eutraChannelNumbers[i].rangeNdl1 <= nDl &&
g_eutraChannelNumbers[i].rangeNdl2 >= nDl)
{
NS_LOG_LOGIC ("entry " << i << " fDlLow=" << g_eutraChannelNumbers[i].fDlLow);
return 1.0e6 * (g_eutraChannelNumbers[i].fDlLow + 0.1 * (nDl - g_eutraChannelNumbers[i].nOffsDl));
return i;
}
}
NS_LOG_ERROR ("invalid EARFCN " << nDl);
return 0.0;
return NUM_EUTRA_BANDS;
}
double
LteSpectrumValueHelper::GetUplinkCarrierFrequency (uint32_t nUl)
uint16_t
LteSpectrumValueHelper::GetUplinkCarrierBand (uint32_t nUl)
{
NS_LOG_FUNCTION (nUl);
for (uint16_t i = 0; i < NUM_EUTRA_BANDS; ++i)
{
if ((g_eutraChannelNumbers[i].rangeNul1 <= nUl)
&& (g_eutraChannelNumbers[i].rangeNul2 >= nUl))
if (g_eutraChannelNumbers[i].rangeNul1 <= nUl &&
g_eutraChannelNumbers[i].rangeNul2 >= nUl)
{
NS_LOG_LOGIC ("entry " << i << " fUlLow=" << g_eutraChannelNumbers[i].fUlLow);
return 1.0e6 * (g_eutraChannelNumbers[i].fUlLow + 0.1 * (nUl - g_eutraChannelNumbers[i].nOffsUl));
return i;
}
}
NS_LOG_ERROR ("invalid EARFCN " << nUl);
return 0.0;
return NUM_EUTRA_BANDS;
}
double
LteSpectrumValueHelper::GetDownlinkCarrierFrequency (uint32_t nDl)
{
NS_LOG_FUNCTION (nDl);
uint16_t i = GetDownlinkCarrierBand (nDl);
if (i == NUM_EUTRA_BANDS)
{
return 0.0;
}
return 1.0e6 * (g_eutraChannelNumbers[i].fDlLow + 0.1 * (nDl - g_eutraChannelNumbers[i].nOffsDl));
}
double
LteSpectrumValueHelper::GetUplinkCarrierFrequency (uint32_t nUl)
{
NS_LOG_FUNCTION (nUl);
uint16_t i = GetUplinkCarrierBand (nUl);
if (i == NUM_EUTRA_BANDS)
{
return 0.0;
}
return 1.0e6 * (g_eutraChannelNumbers[i].fUlLow + 0.1 * (nUl - g_eutraChannelNumbers[i].nOffsUl));
}
double

22
src/lte/model/lte-spectrum-value-helper.h
View File

@@ -48,13 +48,31 @@ public:
static double GetCarrierFrequency (uint32_t earfcn);
/**
* Calculates the dowlink carrier frequency from the E-UTRA Absolute
* Converts downlink EARFCN to corresponding LTE frequency band number.
*
* \param earfcn the EARFCN
*
* \return the downlink carrier band
*/
static uint16_t GetDownlinkCarrierBand (uint32_t nDl);
/**
* Converts uplink EARFCN to corresponding LTE frequency band number.
*
* \param earfcn the EARFCN
*
* \return the uplink carrier band
*/
static uint16_t GetUplinkCarrierBand (uint32_t nDl);
/**
* Calculates the downlink carrier frequency from the E-UTRA Absolute
* Radio Frequency Channel Number (EARFCN) using the formula in 3GPP TS
* 36.101 section 5.7.3 "Carrier frequency and EARFCN".
*
* \param earfcn the EARFCN
*
* \return the dowlink carrier frequency in Hz
* \return the downlink carrier frequency in Hz
*/
static double GetDownlinkCarrierFrequency (uint32_t earfcn);