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openairinterface5g/openair1/SCHED/phy_procedures_lte_common.c
T
Robert Schmidt 8107939f08 Change OAI license to CSSL v1.0 (and others) 
- all RAN code, CI code, configuration files, dockerfiles, in CSSL v1.0
- all deployment code (openshift, charts, ancillary files like shell
  scripts), in MIT
- documentation in CC-BY-4.0
- exceptions might apply and are listed in NOTICE
- there is a new LICENSES folder with all licenses
- CONTRIBUTIONS.md has been updated accordingly

For automated changes based on OAI PL v1.1:

    perl -i~ -0pe 's/\/\*.*Licensed to the OpenAirInterface.*openairinterface.org\n#?/\/*\n * SPDX-License-Identifier: LicenseRef-CSSL-1.0\n/s' **/*.{c,h,cpp}
    perl -i~ -0pe 's/\/\*.*Licensed to the OpenAirInterface.*openairinterface.org\n#?/\/*\n * SPDX-License-Identifier: LicenseRef-CSSL-1.0\n/s' **/*.ts
    perl -i~ -0pe 's/<!--.*Licensed to the OpenAirInterface.*openairinterface.org\n.*-->/<!-- SPDX-License-Identifier: LicenseRef-CSSL-1.0 -->/s' **/*.xml

The rest (cmake, files with missing license, cmake) manually.
2026-03-27 16:36:37 +01:00

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/*
* SPDX-License-Identifier: LicenseRef-CSSL-1.0
*/
/*!
* \brief Implementation of common utilities for eNB/UE procedures from 36.213 LTE specifications
*/
#include "PHY/defs_eNB.h"
#include "PHY/defs_UE.h"
#include "SCHED/sched_common_extern.h"
#include "PHY/LTE_TRANSPORT/transport_common_proto.h"
void get_Msg3_alloc(LTE_DL_FRAME_PARMS *frame_parms,
unsigned char current_subframe,
unsigned int current_frame,
unsigned int *frame,
unsigned char *subframe)
{
// Fill in other TDD Configuration!!!!
if (frame_parms->frame_type == FDD) {
*subframe = current_subframe+6;
if (*subframe>9) {
*subframe = *subframe-10;
*frame = (current_frame+1) & 1023;
} else {
*frame=current_frame;
}
} else { // TDD
if (frame_parms->tdd_config == 1) {
switch (current_subframe) {
case 0:
*subframe = 7;
*frame = current_frame;
break;
case 4:
*subframe = 2;
*frame = (current_frame+1) & 1023;
break;
case 5:
*subframe = 2;
*frame = (current_frame+1) & 1023;
break;
case 9:
*subframe = 7;
*frame = (current_frame+1) & 1023;
break;
}
} else if (frame_parms->tdd_config == 3) {
switch (current_subframe) {
case 0:
case 5:
case 6:
*subframe = 2;
*frame = (current_frame+1) & 1023;
break;
case 7:
*subframe = 3;
*frame = (current_frame+1) & 1023;
break;
case 8:
*subframe = 4;
*frame = (current_frame+1) & 1023;
break;
case 9:
*subframe = 2;
*frame = (current_frame+2) & 1023;
break;
}
} else if (frame_parms->tdd_config == 4) {
switch (current_subframe) {
case 0:
case 4:
case 5:
case 6:
*subframe = 2;
*frame = (current_frame+1) & 1023;
break;
case 7:
*subframe = 3;
*frame = (current_frame+1) & 1023;
break;
case 8:
case 9:
*subframe = 2;
*frame = (current_frame+2) & 1023;
break;
}
} else if (frame_parms->tdd_config == 5) {
switch (current_subframe) {
case 0:
case 4:
case 5:
case 6:
*subframe = 2;
*frame = (current_frame+1) & 1023;
break;
case 7:
case 8:
case 9:
*subframe = 2;
*frame = (current_frame+2) & 1023;
break;
}
}
}
}
void get_Msg3_alloc_ret(LTE_DL_FRAME_PARMS *frame_parms,
unsigned char current_subframe,
unsigned int current_frame,
unsigned int *frame,
unsigned char *subframe)
{
if (frame_parms->frame_type == FDD) {
/* always retransmit in n+8 */
*subframe = current_subframe + 8;
if (*subframe > 9) {
*subframe = *subframe - 10;
*frame = (current_frame + 1) & 1023;
} else {
*frame = current_frame;
}
} else {
if (frame_parms->tdd_config == 1) {
// original PUSCH in 2, PHICH in 6 (S), ret in 2
// original PUSCH in 3, PHICH in 9, ret in 3
// original PUSCH in 7, PHICH in 1 (S), ret in 7
// original PUSCH in 8, PHICH in 4, ret in 8
*frame = (current_frame+1) & 1023;
} else if (frame_parms->tdd_config == 3) {
// original PUSCH in 2, PHICH in 8, ret in 2 next frame
// original PUSCH in 3, PHICH in 9, ret in 3 next frame
// original PUSCH in 4, PHICH in 0, ret in 4 next frame
*frame=(current_frame+1) & 1023;
} else if (frame_parms->tdd_config == 4) {
// original PUSCH in 2, PHICH in 8, ret in 2 next frame
// original PUSCH in 3, PHICH in 9, ret in 3 next frame
*frame=(current_frame+1) & 1023;
} else if (frame_parms->tdd_config == 5) {
// original PUSCH in 2, PHICH in 8, ret in 2 next frame
*frame=(current_frame+1) & 1023;
}
}
}
uint8_t get_Msg3_harq_pid(LTE_DL_FRAME_PARMS *frame_parms,
uint32_t frame,
unsigned char current_subframe)
{
uint8_t ul_subframe=0;
uint32_t ul_frame=0;
if (frame_parms->frame_type ==FDD) {
ul_subframe = (current_subframe>3) ? (current_subframe-4) : (current_subframe+6);
ul_frame = (current_subframe>3) ? ((frame+1)&1023) : frame;
} else {
switch (frame_parms->tdd_config) {
case 1:
switch (current_subframe) {
case 9:
case 0:
ul_subframe = 7;
break;
case 5:
case 7:
ul_subframe = 2;
break;
}
break;
case 3:
switch (current_subframe) {
case 0:
case 5:
case 6:
ul_subframe = 2;
break;
case 7:
ul_subframe = 3;
break;
case 8:
ul_subframe = 4;
break;
case 9:
ul_subframe = 2;
break;
}
break;
case 4:
switch (current_subframe) {
case 0:
case 5:
case 6:
case 8:
case 9:
ul_subframe = 2;
break;
case 7:
ul_subframe = 3;
break;
}
break;
case 5:
ul_subframe =2;
break;
default:
LOG_E(PHY,"get_Msg3_harq_pid: Unsupported TDD configuration %d\n",frame_parms->tdd_config);
AssertFatal(1==0,"get_Msg3_harq_pid: Unsupported TDD configuration");
break;
}
}
return(subframe2harq_pid(frame_parms,ul_frame,ul_subframe));
}
unsigned char ul_ACK_subframe2_dl_subframe(LTE_DL_FRAME_PARMS *frame_parms,unsigned char subframe,unsigned char ACK_index)
{
if (frame_parms->frame_type == FDD) {
return((subframe<4) ? subframe+6 : subframe-4);
} else {
switch (frame_parms->tdd_config) {
case 3:
if (subframe == 2) { // ACK subframes 5 and 6
if (ACK_index==2)
return(1);
return(5+ACK_index);
} else if (subframe == 3) { // ACK subframes 7 and 8
return(7+ACK_index); // To be updated
} else if (subframe == 4) { // ACK subframes 9 and 0
return((9+ACK_index)%10);
} else {
LOG_E(PHY,"phy_procedures_lte_common.c/subframe2_dl_harq_pid: illegal subframe %d for tdd_config %d\n",
subframe,frame_parms->tdd_config);
return(0);
}
break;
case 4:
if (subframe == 2) { // ACK subframes 0, 4 and 5
//if (ACK_index==2)
// return(1); TBC
if (ACK_index==2)
return(0);
return(4+ACK_index);
} else if (subframe == 3) { // ACK subframes 6, 7 8 and 9
return(6+ACK_index); // To be updated
} else {
LOG_E(PHY,"phy_procedures_lte_common.c/subframe2_dl_harq_pid: illegal subframe %d for tdd_config %d\n",
subframe,frame_parms->tdd_config);
return(0);
}
break;
case 1:
if (subframe == 2) { // ACK subframes 5 and 6
return(5+ACK_index);
} else if (subframe == 3) { // ACK subframe 9
return(9); // To be updated
} else if (subframe == 7) { // ACK subframes 0 and 1
return(ACK_index); // To be updated
} else if (subframe == 8) { // ACK subframe 4
return(4); // To be updated
} else {
LOG_E(PHY,"phy_procedures_lte_common.c/ul_ACK_subframe2_dl_subframe: illegal subframe %d for tdd_config %d\n",
subframe,frame_parms->tdd_config);
return(0);
}
break;
}
}
return(0);
}
int ul_ACK_subframe2_dl_frame(LTE_DL_FRAME_PARMS *frame_parms,int frame, unsigned char subframe,unsigned char subframe_tx)
{
if (frame_parms->frame_type == FDD) {
return (((subframe_tx > subframe ) ? frame-1 : frame)+1024)%1024;
} else {
switch (frame_parms->tdd_config) {
case 1:
return(((subframe_tx > subframe ) ? frame-1 : frame)+1024)%1024;
break;
case 3:
//TODO
break;
case 4:
//TODO
break;
}
}
return(0);
}
unsigned char ul_ACK_subframe2_M(LTE_DL_FRAME_PARMS *frame_parms,unsigned char subframe)
{
if (frame_parms->frame_type == FDD) {
return(1);
} else {
switch (frame_parms->tdd_config) {
case 1:
return 1; // don't ACK special subframe for now
if (subframe == 2) { // ACK subframes 5 and 6
return(2);
} else if (subframe == 3) { // ACK subframe 9
return(1); // To be updated
} else if (subframe == 7) { // ACK subframes 0 and 1
return(2); // To be updated
} else if (subframe == 8) { // ACK subframe 4
return(1); // To be updated
} else {
LOG_E(PHY,"phy_procedures_lte_common.c/subframe2_dl_harq_pid: illegal subframe %d for tdd_config %d\n",
subframe,frame_parms->tdd_config);
return(0);
}
break;
case 3:
if (subframe == 2) { // ACK subframes 5 and 6
return(2); // should be 3
} else if (subframe == 3) { // ACK subframes 7 and 8
return(2); // To be updated
} else if (subframe == 4) { // ACK subframes 9 and 0
return(2);
} else {
LOG_E(PHY,"phy_procedures_lte_common.c/subframe2_dl_harq_pid: illegal subframe %d for tdd_config %d\n",
subframe,frame_parms->tdd_config);
return(0);
}
break;
case 4:
if (subframe == 2) { // ACK subframes 0,4 and 5
return(3); // should be 4
} else if (subframe == 3) { // ACK subframes 6,7,8 and 9
return(4);
} else {
LOG_E(PHY,"phy_procedures_lte_common.c/subframe2_dl_harq_pid: illegal subframe %d for tdd_config %d\n",
subframe,frame_parms->tdd_config);
return(0);
}
break;
case 5:
if (subframe == 2) { // ACK subframes 0,3,4,5,6,7,8 and 9
return(8); // should be 3
} else {
LOG_E(PHY,"phy_procedures_lte_common.c/subframe2_dl_harq_pid: illegal subframe %d for tdd_config %d\n",
subframe,frame_parms->tdd_config);
return(0);
}
break;
}
}
return(0);
}
// This function implements table 10.1-1 of 36-213, p. 69
// return the number 'Nbundled'
uint8_t get_reset_ack(LTE_DL_FRAME_PARMS *frame_parms,
harq_status_t *harq_ack,
unsigned char subframe_tx,
unsigned char subframe_rx,
unsigned char *o_ACK,
uint8_t *pN_bundled,
uint8_t cw_idx,
uint8_t do_reset) // 1 to reset ACK/NACK status : 0 otherwise
{
uint8_t status=0;
uint8_t subframe_ul=0xff, subframe_dl0=0xff, subframe_dl1=0xff,subframe_dl2=0xff, subframe_dl3=0xff;
// printf("get_ack: SF %d\n",subframe);
if (frame_parms->frame_type == FDD) {
if (subframe_tx < 4)
subframe_dl0 = subframe_tx + 6;
else
subframe_dl0 = subframe_tx - 4;
o_ACK[cw_idx] = harq_ack[subframe_dl0].ack;
status = harq_ack[subframe_dl0].send_harq_status;
LOG_D(PHY,"dl subframe %d send_harq_status %d cw_idx %d, reset %d\n",subframe_dl0, status, cw_idx, do_reset);
if(do_reset)
harq_ack[subframe_dl0].send_harq_status = 0;
//printf("get_ack: Getting ACK/NAK for PDSCH (subframe %d) => %d\n",subframe_dl,o_ACK[0]);
} else {
switch (frame_parms->tdd_config) {
case 1:
if (subframe_tx == 2) { // ACK subframes 5,6
subframe_ul = 6;
subframe_dl0 = 5;
subframe_dl1 = 6;
} else if (subframe_tx == 3) { // ACK subframe 9
subframe_ul = 9;
subframe_dl0 = 9;
subframe_dl1 = 0xff;
} else if (subframe_tx == 4) { // nothing
subframe_ul = 0xff;
subframe_dl0 = 0xff; // invalid subframe number indicates ACK/NACK is not needed
subframe_dl1 = 0xff;
} else if (subframe_tx == 7) { // ACK subframes 0,1
subframe_ul = 1;
subframe_dl0 = 0;
subframe_dl1 = 1;
} else if (subframe_tx == 8) { // ACK subframes 4
subframe_ul = 4;
subframe_dl0 = 4;
subframe_dl1 = 0xff;
} else {
LOG_E(PHY,"phy_procedures_lte.c: get_ack, illegal subframe_tx %d for tdd_config %d\n",
subframe_tx,frame_parms->tdd_config);
return(0);
}
// report ACK/NACK status
o_ACK[cw_idx] = 1;
status = 0;
if ((subframe_dl0 < 10) && (harq_ack[subframe_dl0].send_harq_status)) {
o_ACK[cw_idx] &= harq_ack[subframe_dl0].ack;
status = harq_ack[subframe_dl0].send_harq_status;
}
if ((subframe_dl1 < 10) && (harq_ack[subframe_dl1].send_harq_status)) {
o_ACK[cw_idx] &= harq_ack[subframe_dl1].ack;
status = harq_ack[subframe_dl1].send_harq_status;
}
// report status = Nbundled
if (!status) {
o_ACK[cw_idx] = 0;
} else {
if (harq_ack[subframe_ul].vDAI_UL < 0xff) {
status = harq_ack[subframe_ul].vDAI_UL;
}
}
if (!do_reset && (subframe_ul < 10)) {
if ((subframe_dl0 < 10) && (subframe_dl1 < 10)) {
LOG_D(PHY,"ul-sf#%d vDAI_UL[sf#%d]=%d Nbundled=%d: dlsf#%d ACK=%d harq_status=%d vDAI_DL=%d, dlsf#%d ACK=%d harq_status=%d vDAI_DL=%d, o_ACK[0]=%d status=%d\n",
subframe_tx, subframe_ul, harq_ack[subframe_ul].vDAI_UL, status,
subframe_dl0, harq_ack[subframe_dl0].ack, harq_ack[subframe_dl0].send_harq_status, harq_ack[subframe_dl0].vDAI_DL,
subframe_dl1, harq_ack[subframe_dl1].ack, harq_ack[subframe_dl1].send_harq_status, harq_ack[subframe_dl1].vDAI_DL,
o_ACK[cw_idx], status);
} else if (subframe_dl0 < 10) {
LOG_D(PHY,"ul-sf#%d vDAI_UL[sf#%d]=%d Nbundled=%d: dlsf#%d ACK=%d status=%d vDAI_DL=%d, o_ACK[0]=%d status=%d\n",
subframe_tx, subframe_ul, harq_ack[subframe_ul].vDAI_UL, status,
subframe_dl0, harq_ack[subframe_dl0].ack, harq_ack[subframe_dl0].send_harq_status, harq_ack[subframe_dl0].vDAI_DL,
o_ACK[cw_idx], status);
}else if (subframe_dl1 < 10) {
LOG_D(PHY,"ul-sf#%d vDAI_UL[sf#%d]=%d Nbundled=%d: dlsf#%d ACK=%d status=%d vDAI_DL=%d, o_ACK[0]=%d status=%d\n",
subframe_tx, subframe_ul, harq_ack[subframe_ul].vDAI_UL, status,
subframe_dl1, harq_ack[subframe_dl1].ack, harq_ack[subframe_dl1].send_harq_status, harq_ack[subframe_dl1].vDAI_DL,
o_ACK[cw_idx], status);
}
}
// reset ACK/NACK status
if (do_reset) {
LOG_D(PHY,"ul-sf#%d ACK/NACK status resetting @ dci0-sf#%d, dci1x/2x-sf#%d, dci1x/2x-sf#%d\n", subframe_tx, subframe_ul, subframe_dl0, subframe_dl1);
if (subframe_ul < 10) {
harq_ack[subframe_ul].vDAI_UL = 0xff;
}
if (subframe_dl0 < 10) {
harq_ack[subframe_dl0].vDAI_DL = 0xff;
harq_ack[subframe_dl0].ack = 2;
harq_ack[subframe_dl0].send_harq_status = 0;
}
if (subframe_dl1 < 10) {
harq_ack[subframe_dl1].vDAI_DL = 0xff;
harq_ack[subframe_dl1].ack = 2;
harq_ack[subframe_dl1].send_harq_status = 0;
}
}
break;
case 3:
if (subframe_tx == 2) { // ACK subframes 5 and 6
subframe_dl0 = 5;
subframe_dl1 = 6;
subframe_ul = 2;
//printf("subframe_tx 2, TDD config 3: harq_ack[5] = %d (%d),harq_ack[6] = %d (%d)\n",harq_ack[5].ack,harq_ack[5].send_harq_status,harq_ack[6].ack,harq_ack[6].send_harq_status);
} else if (subframe_tx == 3) { // ACK subframes 7 and 8
subframe_dl0 = 7;
subframe_dl1 = 8;
subframe_ul = 3;
//printf("Subframe 3, TDD config 3: harq_ack[7] = %d,harq_ack[8] = %d\n",harq_ack[7].ack,harq_ack[8].ack);
//printf("status %d : o_ACK (%d,%d)\n", status,o_ACK[0],o_ACK[1]);
} else if (subframe_tx == 4) { // ACK subframes 9 and 0
subframe_dl0 = 9;
subframe_dl1 = 0;
subframe_ul = 4;
//printf("Subframe 4, TDD config 3: harq_ack[9] = %d,harq_ack[0] = %d\n",harq_ack[9].ack,harq_ack[0].ack);
} else {
LOG_E(PHY,"phy_procedures_lte.c: get_ack, illegal subframe_tx %d for tdd_config %d\n",
subframe_tx,frame_parms->tdd_config);
return(0);
}
// report ACK/NACK status
o_ACK[cw_idx] = 0;
if (harq_ack[subframe_dl0].send_harq_status == 1) {
o_ACK[cw_idx] = harq_ack[subframe_dl0].ack;
if (harq_ack[subframe_dl1].send_harq_status == 1)
o_ACK[cw_idx] &= harq_ack[subframe_dl1].ack;
} else if (harq_ack[subframe_dl1].send_harq_status == 1)
o_ACK[cw_idx] = harq_ack[subframe_dl1].ack;
pN_bundled[0] = harq_ack[subframe_rx].vDAI_UL;
status = harq_ack[subframe_dl0].send_harq_status + harq_ack[subframe_dl1].send_harq_status;
//LOG_D(PHY,"TDD Config3 UL Sfn %d, dl Sfn0 %d status %d o_Ack %d, dl Sfn1 %d status %d o_Ack %d subframe_rx %d N_bundled %d \n",
// subframe_tx, subframe_dl0, harq_ack[subframe_dl0].send_harq_status,harq_ack[subframe_dl0].ack,
// subframe_dl1, harq_ack[subframe_dl1].send_harq_status,harq_ack[subframe_dl1].ack, subframe_rx, pN_bundled[0]);
if (do_reset) {
// reset ACK/NACK status
harq_ack[subframe_dl0].ack = 2;
harq_ack[subframe_dl1].ack = 2;
harq_ack[subframe_dl0].send_harq_status = 0;
harq_ack[subframe_dl1].send_harq_status = 0;
}
break;
case 4:
if (subframe_tx == 2) { // ACK subframes 4, 5 and 0
subframe_dl0 = 0;
subframe_dl1 = 4;
subframe_dl2 = 5;
subframe_ul = 2;
//printf("subframe_tx 2, TDD config 3: harq_ack[5] = %d (%d),harq_ack[6] = %d (%d)\n",harq_ack[5].ack,harq_ack[5].send_harq_status,harq_ack[6].ack,harq_ack[6].send_harq_status);
} else if (subframe_tx == 3) { // ACK subframes 6, 7 8 and 9
subframe_dl0 = 7;
subframe_dl1 = 8;
subframe_dl2 = 9;
subframe_dl3 = 6;
subframe_ul = 3;
//printf("Subframe 3, TDD config 3: harq_ack[7] = %d,harq_ack[8] = %d\n",harq_ack[7].ack,harq_ack[8].ack);
//printf("status %d : o_ACK (%d,%d)\n", status,o_ACK[0],o_ACK[1]);
} else {
LOG_E(PHY,"phy_procedures_lte.c: get_ack, illegal subframe_tx %d for tdd_config %d\n",
subframe_tx,frame_parms->tdd_config);
return(0);
}
// report ACK/NACK status
o_ACK[cw_idx] = 0;
if (harq_ack[subframe_dl0].send_harq_status == 1)
o_ACK[cw_idx] = harq_ack[subframe_dl0].ack;
if (harq_ack[subframe_dl1].send_harq_status == 1)
o_ACK[cw_idx] &= harq_ack[subframe_dl1].ack;
if (harq_ack[subframe_dl2].send_harq_status == 1)
o_ACK[cw_idx] &= harq_ack[subframe_dl2].ack;
if (harq_ack[subframe_dl3].send_harq_status == 1)
o_ACK[cw_idx] &= harq_ack[subframe_dl3].ack;
pN_bundled[0] = harq_ack[subframe_rx].vDAI_UL;
status = harq_ack[subframe_dl0].send_harq_status + harq_ack[subframe_dl1].send_harq_status + harq_ack[subframe_dl2].send_harq_status + harq_ack[subframe_dl3].send_harq_status;
LOG_D(PHY,"TDD Config3 UL Sfn %d, dl Sfn0 %d status %d o_Ack %d, dl Sfn1 %d status %d o_Ack %d dl Sfn2 %d status %d o_Ack %d dl Sfn3 %d status %d o_Ack %d subframe_rx %d N_bundled %d status %d\n",
subframe_tx, subframe_dl0, harq_ack[subframe_dl0].send_harq_status,harq_ack[subframe_dl0].ack,
subframe_dl1, harq_ack[subframe_dl1].send_harq_status,harq_ack[subframe_dl1].ack,
subframe_dl2, harq_ack[subframe_dl2].send_harq_status,harq_ack[subframe_dl2].ack,
subframe_dl3, harq_ack[subframe_dl3].send_harq_status,harq_ack[subframe_dl3].ack,subframe_rx, pN_bundled[0], status);
if (do_reset) {
// reset ACK/NACK status
harq_ack[subframe_dl0].ack = 2;
harq_ack[subframe_dl1].ack = 2;
harq_ack[subframe_dl2].ack = 2;
harq_ack[subframe_dl3].ack = 2;
harq_ack[subframe_dl0].send_harq_status = 0;
harq_ack[subframe_dl1].send_harq_status = 0;
harq_ack[subframe_dl2].send_harq_status = 0;
harq_ack[subframe_dl3].send_harq_status = 0;
}
break;
}
}
//printf("status %d\n",status);
return(status);
}
uint8_t get_ack(LTE_DL_FRAME_PARMS *frame_parms,
harq_status_t *harq_ack,
unsigned char subframe_tx,
unsigned char subframe_rx,
unsigned char *o_ACK,
uint8_t cw_idx)
{
uint8_t N_bundled = 0;
return get_reset_ack(frame_parms, harq_ack, subframe_tx, subframe_rx, o_ACK, &N_bundled, cw_idx, 0);
}
uint8_t reset_ack(LTE_DL_FRAME_PARMS *frame_parms,
harq_status_t *harq_ack,
unsigned char subframe_tx,
unsigned char subframe_rx,
unsigned char *o_ACK,
uint8_t *pN_bundled,
uint8_t cw_idx)
{
return get_reset_ack(frame_parms, harq_ack, subframe_tx, subframe_rx, o_ACK, pN_bundled, cw_idx, 1);
}
static const uint8_t Np6[4] = {0, 1, 3, 5};
static const uint8_t Np15[4] = {0, 3, 8, 13};
static const uint8_t Np25[4] = {0, 5, 13, 22};
static const uint8_t Np50[4] = {0, 11, 27, 44};
static const uint8_t Np75[4] = {0, 16, 41, 66};
static const uint8_t Np100[4] = {0, 22, 55, 88};
// This is part of the PUCCH allocation procedure (see Section 10.1 36.213)
uint16_t get_Np(uint8_t N_RB_DL,uint8_t nCCE,uint8_t plus1)
{
const uint8_t *Np;
switch (N_RB_DL) {
case 6:
Np=Np6;
break;
case 15:
Np=Np15;
break;
case 25:
Np=Np25;
break;
case 50:
Np=Np50;
break;
case 75:
Np=Np75;
break;
case 100:
Np=Np100;
break;
default:
LOG_E(PHY,"get_Np() FATAL: unsupported N_RB_DL %d\n",N_RB_DL);
return(0);
break;
}
if (nCCE>=Np[2])
return(Np[2+plus1]);
else if (nCCE>=Np[1])
return(Np[1+plus1]);
else
return(Np[0+plus1]);
}
int subframe_num(LTE_DL_FRAME_PARMS *frame_parms){
if (frame_parms->frame_type == FDD)
return 10;
switch (frame_parms->tdd_config) {
case 1:
return 6;
case 3:
return 7;
case 4:
return 8;
case 5:
return 9;
default:
LOG_E(PHY,"Unsupported TDD configuration %d\n",frame_parms->tdd_config);
AssertFatal(frame_parms->tdd_config==1 || frame_parms->tdd_config==3 || frame_parms->tdd_config==4 || frame_parms->tdd_config==5,"subframe x Unsupported TDD configuration");
return(255);
}
}
lte_subframe_t subframe_select(LTE_DL_FRAME_PARMS *frame_parms,
unsigned char subframe)
{
// if FDD return dummy value
if (frame_parms->frame_type == FDD)
return(SF_DL);
switch (frame_parms->tdd_config) {
case 1:
switch (subframe) {
case 0:
case 4:
case 5:
case 9:
return(SF_DL);
break;
case 2:
case 3:
case 7:
case 8:
return(SF_UL);
break;
default:
return(SF_S);
break;
}
case 3:
if ((subframe<1) || (subframe>=5))
return(SF_DL);
else if ((subframe>1) && (subframe < 5))
return(SF_UL);
else if (subframe==1)
return (SF_S);
else {
LOG_E(PHY,"[PHY_PROCEDURES_LTE] Unknown subframe number\n");
return(255);
}
case 4:
if ((subframe<1) || (subframe>=4))
return(SF_DL);
else if ((subframe>1) && (subframe < 4))
return(SF_UL);
else if (subframe==1)
return (SF_S);
else {
LOG_E(PHY,"[PHY_PROCEDURES_LTE] Unknown subframe number\n");
return(255);
}
case 5:
if ((subframe<1) || (subframe>=3))
return(SF_DL);
else if ((subframe>1) && (subframe < 3))
return(SF_UL);
else if (subframe==1)
return (SF_S);
else {
LOG_E(PHY,"[PHY_PROCEDURES_LTE] Unknown subframe number\n");
return(255);
}
break;
default:
AssertFatal(1==0,"subframe %d Unsupported TDD configuration %d\n",subframe,frame_parms->tdd_config);
return(255);
}
}
dci_detect_mode_t dci_detect_mode_select(LTE_DL_FRAME_PARMS *frame_parms,uint8_t subframe)
{
dci_detect_mode_t ret = 0;
static const dci_detect_mode_t Table_8_2_3gpp_36_213[][10] = {
// subf0 , subf1 , subf2 , subf3 , subf4 , subf5 , subf6 , subf7 , subf8 , subf9
{UL_DL_DCI, UL_DL_DCI, NO_DCI, NO_DCI, NO_DCI, UL_DL_DCI, UL_DL_DCI, NO_DCI, NO_DCI, NO_DCI}, // tdd0
{DL_DCI, UL_DL_DCI, NO_DCI, NO_DCI, UL_DL_DCI, DL_DCI, UL_DL_DCI, NO_DCI, NO_DCI, UL_DL_DCI}, // tdd1
{DL_DCI, DL_DCI, NO_DCI, UL_DL_DCI, DL_DCI, DL_DCI, DL_DCI, NO_DCI, UL_DL_DCI, DL_DCI}, // tdd2
{UL_DL_DCI, DL_DCI, NO_DCI, NO_DCI, NO_DCI, DL_DCI, DL_DCI, DL_DCI, UL_DL_DCI, UL_DL_DCI}, // tdd3
{DL_DCI, DL_DCI, NO_DCI, NO_DCI, DL_DCI, DL_DCI, DL_DCI, DL_DCI, UL_DL_DCI, UL_DL_DCI}, // tdd4
{DL_DCI, DL_DCI, NO_DCI, DL_DCI, DL_DCI, DL_DCI, DL_DCI, DL_DCI, UL_DL_DCI, DL_DCI}, // tdd5
{UL_DL_DCI, UL_DL_DCI, NO_DCI, NO_DCI, NO_DCI, UL_DL_DCI, UL_DL_DCI, NO_DCI, NO_DCI, UL_DL_DCI}}; // tdd6
DevAssert(subframe>=0 && subframe<=9);
DevAssert((frame_parms->tdd_config)>=0 && (frame_parms->tdd_config)<=6);
if (frame_parms->frame_type == FDD) {
ret = UL_DL_DCI;
} else {
ret = Table_8_2_3gpp_36_213[frame_parms->tdd_config][subframe];
}
LOG_D(PHY, "subframe %d: detect UL_DCI=%d, detect DL_DCI=%d\n", subframe, (ret & UL_DCI)>0, (ret & DL_DCI)>0);
return ret;
}
uint8_t phich_subframe_to_harq_pid(LTE_DL_FRAME_PARMS *frame_parms,uint32_t frame,uint8_t subframe)
{
LOG_D(PHY,"phich_subframe_to_harq_pid.c: frame %d, subframe %d\n",frame,subframe);
return(subframe2harq_pid(frame_parms,
phich_frame2_pusch_frame(frame_parms,frame,subframe),
phich_subframe2_pusch_subframe(frame_parms,subframe)));
}
unsigned int is_phich_subframe(LTE_DL_FRAME_PARMS *frame_parms,unsigned char subframe)
{
if (frame_parms->frame_type == FDD) {
return(1);
} else {
switch (frame_parms->tdd_config) {
case 1:
if ((subframe == 1) || (subframe == 4) || (subframe == 6) || (subframe == 9))
return(1);
break;
case 3:
if ((subframe == 0) || (subframe == 8) || (subframe == 9))
return(1);
break;
case 4:
if ((subframe == 8) || (subframe == 9) )
return(1);
break;
case 5:
if (subframe == 8)
return(1);
break;
default:
return(0);
break;
}
}
return(0);
}
/*
LTE_eNB_UE_stats* get_UE_stats(uint8_t Mod_id, uint8_t CC_id,uint16_t rnti)
{
int8_t UE_id;
if ((RC.eNB == NULL) || (Mod_id > RC.nb_inst) || (CC_id > RC.nb_CC[Mod_id])) {
LOG_E(PHY,"get_UE_stats: No eNB found (or not allocated) for Mod_id %d,CC_id %d\n",Mod_id,CC_id);
return NULL;
}
UE_id = find_ue(rnti, RC.eNB[Mod_id][CC_id]);
if (UE_id == -1) {
// LOG_E(PHY,"get_UE_stats: UE with rnti %x not found\n",rnti);
return NULL;
}
return(&RC.eNB[Mod_id][CC_id]->UE_stats[(uint32_t)UE_id]);
}
*/
/*
LTE_DL_FRAME_PARMS* get_lte_frame_parms(module_id_t Mod_id, uint8_t CC_id)
{
return(&RC.eNB[Mod_id][CC_id]->frame_parms);
}
MU_MIMO_mode *get_mu_mimo_mode (module_id_t Mod_id, uint8_t CC_id, rnti_t rnti)
{
int8_t UE_id = find_ue( rnti, RC.eNB[Mod_id][CC_id] );
if (UE_id == -1)
return 0;
return &RC.eNB[Mod_id][CC_id]->mu_mimo_mode[UE_id];
}
*/
int is_srs_occasion_common(LTE_DL_FRAME_PARMS *frame_parms,int frame_tx,int subframe_tx)
{
uint8_t isSubframeSRS = 0; // SRS Cell Occasion
//ue->ulsch[eNB_id]->srs_active = 0;
//ue->ulsch[eNB_id]->Nsymb_pusch = 12-(frame_parms->Ncp<<1)- ue->ulsch[eNB_id]->srs_active;
if(frame_parms->soundingrs_ul_config_common.enabled_flag)
{
//LOG_D(PHY," SRS SUBFRAMECONFIG: %d\n", frame_parms->soundingrs_ul_config_common.srs_SubframeConfig);
uint8_t TSFC;
uint16_t deltaTSFC; // bitmap
uint8_t srs_SubframeConfig;
// table resuming TSFC (Period) and deltaSFC (offset)
const uint16_t deltaTSFCTabType1[15][2] = { {1,1},{1,2},{2,2},{1,5},{2,5},{4,5},{8,5},{3,5},{12,5},{1,10},{2,10},{4,10},{8,10},{351,10},{383,10} }; // Table 5.5.3.3-2 3GPP 36.211 FDD
const uint16_t deltaTSFCTabType2[14][2] = { {2,5},{6,5},{10,5},{18,5},{14,5},{22,5},{26,5},{30,5},{70,10},{74,10},{194,10},{326,10},{586,10},{210,10} }; // Table 5.5.3.3-2 3GPP 36.211 TDD
srs_SubframeConfig = frame_parms->soundingrs_ul_config_common.srs_SubframeConfig;
if (FDD == frame_parms->frame_type)
{
// srs_SubframeConfig =< 14
deltaTSFC = deltaTSFCTabType1[srs_SubframeConfig][0];
TSFC = deltaTSFCTabType1[srs_SubframeConfig][1];
}
else
{
// srs_SubframeConfig =< 13
deltaTSFC = deltaTSFCTabType2[srs_SubframeConfig][0];
TSFC = deltaTSFCTabType2[srs_SubframeConfig][1];
}
// Sounding reference signal subframes are the subframes satisfying ns/2 mod TSFC (- deltaTSFC
uint16_t tmp = (subframe_tx % TSFC);
if((1<<tmp) & deltaTSFC)
{
// This is a Sounding reference signal subframes
isSubframeSRS = 1;
}
LOG_D(PHY," ISTDD: %d, TSFC: %d, deltaTSFC: %d, AbsSubframeTX: %d.%d\n", frame_parms->frame_type, TSFC, deltaTSFC, frame_tx, subframe_tx);
}
//LOG_D(PHY," isSubframeSRS %d\n", isSubframeSRS);
return(isSubframeSRS);
}
void compute_srs_pos(frame_type_t frameType,uint16_t isrs,uint16_t *psrsPeriodicity,uint16_t *psrsOffset)
{
if(TDD == frameType)
{
AssertFatal(isrs>=10,"2 ms SRS periodicity not supported");
if((isrs>9)&&(isrs<15))
{
*psrsPeriodicity=5;
*psrsOffset=isrs-10;
}
if((isrs>14)&&(isrs<25))
{
*psrsPeriodicity=10;
*psrsOffset=isrs-15;
}
if((isrs>24)&&(isrs<45))
{
*psrsPeriodicity=20;
*psrsOffset=isrs-25;
}
if((isrs>44)&&(isrs<85))
{
*psrsPeriodicity=40;
*psrsOffset=isrs-45;
}
if((isrs>84)&&(isrs<165))
{
*psrsPeriodicity=80;
*psrsOffset=isrs-85;
}
if((isrs>164)&&(isrs<325))
{
*psrsPeriodicity=160;
*psrsOffset=isrs-165;
}
if((isrs>324)&&(isrs<645))
{
*psrsPeriodicity=320;
*psrsOffset=isrs-325;
}
AssertFatal(isrs<=644,"Isrs out of range %d>644\n",isrs);
}
else
{
if(isrs<2)
{
*psrsPeriodicity=2;
*psrsOffset=isrs;
}
if((isrs>1)&&(isrs<7))
{
*psrsPeriodicity=5;
*psrsOffset=isrs-2;
}
if((isrs>6)&&(isrs<17))
{
*psrsPeriodicity=10;
*psrsOffset=isrs-7;
}
if((isrs>16)&&(isrs<37))
{
*psrsPeriodicity=20;
*psrsOffset=isrs-17;
}
if((isrs>36)&&(isrs<77))
{
*psrsPeriodicity=40;
*psrsOffset=isrs-37;
}
if((isrs>76)&&(isrs<157))
{
*psrsPeriodicity=80;
*psrsOffset=isrs-77;
}
if((isrs>156)&&(isrs<317))
{
*psrsPeriodicity=160;
*psrsOffset=isrs-157;
}
if((isrs>316)&&(isrs<637))
{
*psrsPeriodicity=320;
*psrsOffset=isrs-317;
}
AssertFatal(isrs<=636,"Isrs out of range %d>636\n",isrs);
}
}
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