radisys
/
osmo-pcu
forked from cellular-infrastructure/osmo-pcu
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Handle EGPRS 11 bit RACH in osmo-pcu 

A function is_single_block is added to get request type of RACH.
EGPRS 11 bit RACH is handled.

Change-Id: I61d74a32f7764644ed86f7fdf97fa3c2f61503f7
This commit is contained in:
bhargava 2016-09-14 20:30:31 +05:30 committed by arvind.sirsikar
parent 0ee31cfa38
commit 628dcfbc97
2 changed files with 84 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

93
src/bts.cpp
View File

@ -480,20 +480,16 @@ int BTS::rcv_rach(uint16_t ra, uint32_t Fn, int16_t qta, uint8_t is_11bit,
uint8_t usf = 7;
uint8_t tsc;
uint16_t ta;
uint16_t ms_class = 0;
uint16_t priority = 0;
rach_frame();
LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF on RACH, so we provide "
"one:\n");
if ((ra & 0xf8) == 0x70) {
LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single block "
"allocation\n");
sb = 1;
} else if (m_bts.force_two_phase) {
LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single phase access, "
"but we force two phase access\n");
sb = 1;
}
sb = is_single_block(ra, burst_type, is_11bit, &ms_class, &priority);
if (qta < 0)
qta = 0;
if (qta > 252)
@ -516,8 +512,16 @@ int BTS::rcv_rach(uint16_t ra, uint32_t Fn, int16_t qta, uint8_t is_11bit,
} else {
// Create new TBF
#warning "Copy and paste with other routines.."
/* set class to 0, since we don't know the multislot class yet */
tbf = tbf_alloc_ul_tbf(&m_bts, NULL, -1, 0, 0, 1);
if (is_11bit) {
tbf = tbf_alloc_ul_tbf(&m_bts, NULL, -1, 0,
ms_class, 1);
} else {
/* set class to 0, since we don't know the multislot
* class yet */
tbf = tbf_alloc_ul_tbf(&m_bts, NULL, -1, 0, 0, 1);
}
if (!tbf) {
LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n");
/* FIXME: send reject */
@ -565,6 +569,73 @@ int BTS::rcv_rach(uint16_t ra, uint32_t Fn, int16_t qta, uint8_t is_11bit,
return 0;
}
uint8_t BTS::is_single_block(uint16_t ra, enum ph_burst_type burst_type,
uint8_t is_11bit, uint16_t *ms_class, uint16_t *priority)
{
uint8_t sb = 0, val = 0;
if (!is_11bit && (burst_type == GSM_L1_BURST_TYPE_ACCESS_0)) {
if ((ra & 0xf8) == 0x70) {
LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single block "
"allocation\n");
sb = 1;
} else if (m_bts.force_two_phase) {
LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single "
"phase access, but we force two phase "
"access\n");
sb = 1;
}
} else if (is_11bit &&
((burst_type == GSM_L1_BURST_TYPE_ACCESS_1) ||
(burst_type == GSM_L1_BURST_TYPE_ACCESS_2))) {
val = !!(ra & (1 << 10));
if (!val) {
if (m_bts.force_two_phase) {
LOGP(DRLCMAC, LOGL_DEBUG, "EGPRS 11 bit RACH "
"received. MS requests single phase "
"access but we force two phase "
"access\n");
sb = 1;
} else {
sb = 0;
*ms_class = (ra & 0x3e0) >> 5;
*priority = (ra & 0x18) >> 3;
}
} else {
LOGP(DRLCMAC, LOGL_DEBUG, "EGPRS 11 bit RACH received."
"MS requests single block allocation\n");
sb = 1;
}
} else if (is_11bit &&
(burst_type == GSM_L1_BURST_TYPE_ACCESS_0)) {
LOGP(DRLCMAC, LOGL_ERROR,
"Error: GPRS 11 bit RACH not supported\n");
} else if (burst_type == GSM_L1_BURST_TYPE_NONE) {
LOGP(DRLCMAC, LOGL_DEBUG, "pcu has not received burst type "
"from bts \n");
if ((ra & 0xf8) == 0x70) {
LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single block "
"allocation\n");
sb = 1;
} else if (m_bts.force_two_phase) {
LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single "
"phase access, but we force two phase "
"access\n");
sb = 1;
}
}
return sb;
}
/* depending on the current TBF, we assign on PACCH or AGCH */
void BTS::trigger_dl_ass(
struct gprs_rlcmac_dl_tbf *dl_tbf,

2
src/bts.h
View File

@ -290,6 +290,8 @@ public:
int tfi_find_free(enum gprs_rlcmac_tbf_direction dir, uint8_t *_trx, int8_t use_trx);
int rcv_imm_ass_cnf(const uint8_t *data, uint32_t fn);
uint8_t is_single_block(uint16_t ra, enum ph_burst_type burst_type,
uint8_t is_11bit, uint16_t *ms_class, uint16_t *priority);
int rcv_rach(uint16_t ra, uint32_t Fn, int16_t qta, uint8_t is_11bit,
enum ph_burst_type burst_type);