/******************************************************************************* OpenAirInterface Copyright(c) 1999 - 2014 Eurecom OpenAirInterface is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. OpenAirInterface is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenAirInterface.The full GNU General Public License is included in this distribution in the file called "COPYING". If not, see <http://www.gnu.org/licenses/>. Contact Information OpenAirInterface Admin: openair_admin@eurecom.fr OpenAirInterface Tech : openair_tech@eurecom.fr OpenAirInterface Dev : openair4g-devel@lists.eurecom.fr Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE *******************************************************************************/ #include "PHY/defs.h" #include "PHY/extern.h" #include "assertions.h" const unsigned int Ttab[4] = {32,64,128,256}; // This function implements the initialization of paging parameters for UE (See Section 7, 36.304) // It must be called after setting IMSImod1024 during UE startup and after receiving SIB2 int init_ue_paging_info(PHY_VARS_UE *ue, long defaultPagingCycle, long nB) { LTE_DL_FRAME_PARMS *fp = &ue->frame_parms; unsigned int T = Ttab[defaultPagingCycle]; unsigned int N = (nB<=2) ? T : (T>>(nB-2)); unsigned int Ns = (nB<2) ? (1<<(2-nB)) : 1; unsigned int UE_ID = ue->IMSImod1024; unsigned int i_s = (UE_ID/N)%Ns; ue->PF = (T/N) * (UE_ID % N); // This implements Section 7.2 from 36.304 if (Ns==1) ue->PO = (fp->frame_type==FDD) ? 9 : 0; else if (Ns==2) ue->PO = (fp->frame_type==FDD) ? (4+(5*i_s)) : (5*i_s); else if (Ns==4) ue->PO = (fp->frame_type==FDD) ? (4*(i_s&1)+(5*(i_s>>1))) : ((i_s&1)+(5*(i_s>>1))); else AssertFatal(1==0,"init_ue_paging_info: Ns is %d\n",Ns); return(0); }