prov.c

wimax BS simulation code,implemented under linux.

/*
 * This piece of code is totally free. If any pitfalls found, 
 * please feel free to contact me at [e-mail]
 * THANKS A LOT!
 */

#include <string.h>

#include "prov.h"

PROVISION prov;

const static UINT16 frame_duration_code[] =
{
	0, /* N/A */
	 20, 25, 40, 50, 80, 100, 125, 200,
};

static void update_prov(PROVISION* prov)
{
	prov->frm_dur = frame_duration_code[prov->frm_dur_code];

	if (prov->phy_usc == PHY_PUSC)
	{
		if (prov->nsubcr == 2048)
		{
			prov->nsubchan   = 60;
			prov->ncr_per_sc = 24;
		}
		else if (prov->nsubcr == 1024)
		{
			prov->nsubchan   = 30;
			prov->ncr_per_sc = 24;
		}
		else if (prov->nsubcr == 512)
		{
			prov->nsubchan   = 15;
			prov->ncr_per_sc = 24;
		}
		else if (prov->nsubcr == 128)
		{
			prov->nsubchan   = 3;
			prov->ncr_per_sc = 24;
		}
	}
	else if (prov->phy_usc == PHY_FUSC)
	{
		if (prov->nsubcr == 2048)
		{
			prov->nsubchan   = 32;
			prov->ncr_per_sc = 48;
		}
		else if (prov->nsubcr == 1024)
		{
			prov->nsubchan   = 16;
			prov->ncr_per_sc = 48;
		}
		else if (prov->nsubcr == 512)
		{
			prov->nsubchan   = 8;
			prov->ncr_per_sc = 48;
		}
		else if (prov->nsubcr == 128)
		{
			prov->nsubchan   = 2;
			prov->ncr_per_sc = 48;
		}
	}

	prov->ncr_all = prov->nsubchan * prov->ncr_per_sc;

	prov->nhz_per_cr   = prov->bandwidth * 1000 / prov->nsubcr;
	prov->nhz_per_sc   = prov->nhz_per_cr * prov->ncr_per_sc;
	prov->nhz_per_sec  = prov->nhz_per_sc * prov->nsubchan;
	prov->nhz_per_frm = ((prov->nhz_per_sec * prov->frm_dur) / FRM_DUR_BASE) / 1000;

	prov->nsym_per_cr = ((prov->nhz_per_cr * prov->frm_dur) / FRM_DUR_BASE) / 1000;

	if (prov->phy_mode == PHY_MODE_TDD)
	{
		prov->ul_nsym_per_cr = prov->nsym_per_cr >> 1;
		prov->dl_nsym_per_cr = prov->nsym_per_cr - prov->ul_nsym_per_cr;
	}
	else if (prov->phy_mode == PHY_MODE_FDD)
	{
		prov->ul_nsym_per_cr = prov->dl_nsym_per_cr = prov->nsym_per_cr;
	}

	prov->dl_nsym_per_sc = prov->dl_nsym_per_cr * prov->ncr_per_sc;
	prov->ul_nsym_per_sc = prov->ul_nsym_per_cr * prov->ncr_per_sc;

	prov->dl_nsym = prov->dl_nsym_per_sc * prov->nsubchan;
	prov->ul_nsym = prov->ul_nsym_per_sc * prov->nsubchan;
}

void init_prov()
{
	strcpy(prov.tx_dev, "eth0");
	strcpy(prov.rx_dev, "eth0");

	prov.tick_unit = 200;


	prov.bs_code = 0xa0a0;
	prov.ms_code = 0xa0b0;

	prov.phy_mode = PHY_MODE_TDD;
	prov.phy_type = PHY_TYPE_OFDMA;

	prov.bandwidth  = 3500;  /* 3.5MHz */
	prov.nsubcr     = 512;
	prov.frm_dur_code = 4; /* 5ms */
	prov.phy_usc   = PHY_FUSC;

	update_prov(&prov);
}