Add counter for successful contention resolution procedures

This counter is related to succPDTCHSeizures,
(3GPP TS 52.402 B.2.1.51 Successful PDTCH seizures).

The relevant event when the first RLC block on the PDCH from the MS is
received is the fact that contention resolution is considered as done in
the network side. Hence, name the counter that way to ease
interpretation.

Related: SYS#4878
Change-Id: I3d67e3e68907921b43f2ca4398ad9578c0b2618c

src/bts.cpp

@@ -147,6 +147,7 @@ static const struct rate_ctr_desc bts_ctr_description[] = {
 	{ "immediate:assignment_UL",	"Immediate Assign UL  "},
 	{ "immediate:assignment_ul:one_phase",	"Immediate Assign UL (one phase packet access)"}, /* TS 52.402 B.2.1.50 */
 	{ "immediate:assignment_ul:two_phase",	"Immediate Assign UL (two phase packet access)"}, /* TS 52.402 B.2.1.50 */
+	{ "immediate:assignment_ul:contention_resolution_success", "First RLC Block (PDU) on the PDTCH from the MS received"}, /* TS 52.402 B.2.1.51 */
 	{ "immediate:assignment_rej",   "Immediate Assign Rej "},
 	{ "immediate:assignment_DL",	"Immediate Assign DL  "},
 	{ "channel:request_description","Channel Request Desc "},

src/bts.h

@@ -139,6 +139,7 @@ enum {
 	CTR_IMMEDIATE_ASSIGN_UL_TBF,
 	CTR_IMMEDIATE_ASSIGN_UL_TBF_ONE_PHASE,
 	CTR_IMMEDIATE_ASSIGN_UL_TBF_TWO_PHASE,
+	CTR_IMMEDIATE_ASSIGN_UL_TBF_CONTENTION_RESOLUTION_SUCCESS,
 	CTR_IMMEDIATE_ASSIGN_REJ,
 	CTR_IMMEDIATE_ASSIGN_DL_TBF,
 	CTR_CHANNEL_REQUEST_DESCRIPTION,

src/pdch.cpp

@@ -650,6 +650,8 @@ void gprs_rlcmac_pdch::rcv_resource_request(Packet_Resource_Request_t *request,
 				"MS requests UL TBF throguh SBA\n", fn);
 			ms_set_ta(ms, sba->ta);
 			sba_free(sba);
+			/* MS seized the PDCH answering on the SBA: */
+			bts_do_rate_ctr_inc(bts, CTR_IMMEDIATE_ASSIGN_UL_TBF_CONTENTION_RESOLUTION_SUCCESS);
 			break;
 		case PDCH_ULC_NODE_TBF_POLL:
 			if (item->tbf_poll.poll_tbf->direction != GPRS_RLCMAC_UL_TBF) {

src/tbf_ul.cpp

@@ -332,6 +332,8 @@ void gprs_rlcmac_ul_tbf::contention_resolution_success()
 	/* now we must set this flag, so we are allowed to assign downlink
 	 * TBF on PACCH. it is only allowed when TLLI is acknowledged. */
 	m_contention_resolution_done = 1;
+
+	bts_do_rate_ctr_inc(bts, CTR_IMMEDIATE_ASSIGN_UL_TBF_CONTENTION_RESOLUTION_SUCCESS);
 }
 
 /*! \brief receive data from PDCH/L1 */