1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
/*
Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The OpenAirInterface Software Alliance licenses this file to You under
the OAI Public License, Version 1.1 (the "License"); you may not use this file
except in compliance with the License.
You may obtain a copy of the License at
http://www.openairinterface.org/?page_id=698
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-------------------------------------------------------------------------------
For more information about the OpenAirInterface (OAI) Software Alliance:
contact@openairinterface.org
*/
/*
enb_app.c
-------------------
AUTHOR : Laurent Winckel, Sebastien ROUX, Lionel GAUTHIER, Navid Nikaein
COMPANY : EURECOM
EMAIL : Lionel.Gauthier@eurecom.fr and Navid Nikaein
*/
#include <string.h>
#include <stdio.h>
#include "enb_app.h"
#include "enb_config.h"
#include "assertions.h"
#include "common/ran_context.h"
#include "common/utils/LOG/log.h"
#if defined(ENABLE_ITTI)
#include "intertask_interface.h"
#if defined(ENABLE_USE_MME)
#include "s1ap_eNB.h"
#include "sctp_eNB_task.h"
#include "gtpv1u_eNB_task.h"
#else
#define EPC_MODE_ENABLED 0
#endif
//# include "x2ap_eNB.h"
#include "x2ap_messages_types.h"
#define X2AP_ENB_REGISTER_RETRY_DELAY 10
#include "openair1/PHY/INIT/phy_init.h"
extern unsigned char NB_eNB_INST;
#endif
extern RAN_CONTEXT_t RC;
#if defined(ENABLE_ITTI)
/*------------------------------------------------------------------------------*/
#if defined(ENABLE_USE_MME)
#define ENB_REGISTER_RETRY_DELAY 10
#endif
/*------------------------------------------------------------------------------*/
/*
static void configure_phy(module_id_t enb_id, const Enb_properties_array_t* enb_properties)
{
MessageDef *msg_p;
int CC_id;
msg_p = itti_alloc_new_message (TASK_ENB_APP, PHY_CONFIGURATION_REQ);
for (CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {
PHY_CONFIGURATION_REQ (msg_p).frame_type[CC_id] = enb_properties->properties[enb_id]->frame_type[CC_id];
PHY_CONFIGURATION_REQ (msg_p).prefix_type[CC_id] = enb_properties->properties[enb_id]->prefix_type[CC_id];
PHY_CONFIGURATION_REQ (msg_p).downlink_frequency[CC_id] = enb_properties->properties[enb_id]->downlink_frequency[CC_id];
PHY_CONFIGURATION_REQ (msg_p).uplink_frequency_offset[CC_id] = enb_properties->properties[enb_id]->uplink_frequency_offset[CC_id];
PHY_CONFIGURATION_REQ (msg_p).nb_antennas_tx[CC_id] = enb_properties->properties[enb_id]->nb_antennas_tx[CC_id];
PHY_CONFIGURATION_REQ (msg_p).nb_antennas_rx[CC_id] = enb_properties->properties[enb_id]->nb_antennas_rx[CC_id];
PHY_CONFIGURATION_REQ (msg_p).tx_gain[CC_id] = enb_properties->properties[enb_id]->tx_gain[CC_id];
PHY_CONFIGURATION_REQ (msg_p).rx_gain[CC_id] = enb_properties->properties[enb_id]->rx_gain[CC_id];
}
itti_send_msg_to_task (TASK_PHY_ENB, ENB_MODULE_ID_TO_INSTANCE(enb_id), msg_p);
}
*/
/*------------------------------------------------------------------------------*/
static void configure_rrc(uint32_t enb_id) {
MessageDef *msg_p = NULL;
// int CC_id;
msg_p = itti_alloc_new_message (TASK_ENB_APP, RRC_CONFIGURATION_REQ);
if (RC.rrc[enb_id]) {
RCconfig_RRC(msg_p,enb_id, RC.rrc[enb_id]);
LOG_I(ENB_APP,"Sending configuration message to RRC task\n");
itti_send_msg_to_task (TASK_RRC_ENB, ENB_MODULE_ID_TO_INSTANCE(enb_id), msg_p);
} else AssertFatal(0,"RRC context for eNB %d not allocated\n",enb_id);
}
/*------------------------------------------------------------------------------*/
# if defined(ENABLE_USE_MME)
static uint32_t eNB_app_register(uint32_t enb_id_start, uint32_t enb_id_end) { //, const Enb_properties_array_t *enb_properties)
uint32_t enb_id;
MessageDef *msg_p;
uint32_t register_enb_pending = 0;
for (enb_id = enb_id_start; (enb_id < enb_id_end) ; enb_id++) {
{
/* note: there is an implicit relationship between the data structure and the message name */
msg_p = itti_alloc_new_message (TASK_ENB_APP, S1AP_REGISTER_ENB_REQ);
RCconfig_S1(msg_p, enb_id);
if (enb_id == 0) RCconfig_gtpu();
LOG_I(ENB_APP,"default drx %d\n",((S1AP_REGISTER_ENB_REQ(msg_p)).default_drx));
LOG_I(ENB_APP,"[eNB %d] eNB_app_register for instance %d\n", enb_id, ENB_MODULE_ID_TO_INSTANCE(enb_id));
itti_send_msg_to_task (TASK_S1AP, ENB_MODULE_ID_TO_INSTANCE(enb_id), msg_p);
register_enb_pending++;
}
}
return register_enb_pending;
}
# endif
#endif
/*------------------------------------------------------------------------------*/
static uint32_t eNB_app_register_x2(uint32_t enb_id_start, uint32_t enb_id_end) {
uint32_t enb_id;
MessageDef *msg_p;
uint32_t register_enb_x2_pending = 0;
for (enb_id = enb_id_start; (enb_id < enb_id_end) ; enb_id++) {
{
msg_p = itti_alloc_new_message (TASK_ENB_APP, X2AP_REGISTER_ENB_REQ);
RCconfig_X2(msg_p, enb_id);
//itti_send_msg_to_task (TASK_X2AP, ENB_MODULE_ID_TO_INSTANCE(enb_id), msg_p);
register_enb_x2_pending++;
}
}
return register_enb_x2_pending;
}
/*------------------------------------------------------------------------------*/
void *eNB_app_task(void *args_p) {
#if defined(ENABLE_ITTI)
uint32_t enb_nb = RC.nb_inst;
uint32_t enb_id_start = 0;
uint32_t enb_id_end = enb_id_start + enb_nb;
# if defined(ENABLE_USE_MME)
uint32_t register_enb_pending=0;
uint32_t registered_enb;
long enb_register_retry_timer_id;
# endif
uint32_t x2_register_enb_pending;
//uint32_t x2_registered_enb;
//long x2_enb_register_retry_timer_id;
uint32_t enb_id;
MessageDef *msg_p = NULL;
instance_t instance;
int result;
/* for no gcc warnings */
(void)instance;
itti_mark_task_ready (TASK_ENB_APP);
LOG_I(PHY, "%s() Task ready initialise structures\n", __FUNCTION__);
RCconfig_L1();
RCconfig_macrlc();
LOG_I(PHY, "%s() RC.nb_L1_inst:%d\n", __FUNCTION__, RC.nb_L1_inst);
if (RC.nb_L1_inst>0) AssertFatal(l1_north_init_eNB()==0,"could not initialize L1 north interface\n");
AssertFatal (enb_nb <= RC.nb_inst,
"Number of eNB is greater than eNB defined in configuration file (%d/%d)!",
enb_nb, RC.nb_inst);
LOG_I(ENB_APP,"Allocating eNB_RRC_INST for %d instances\n",RC.nb_inst);
RC.rrc = (eNB_RRC_INST **)malloc(RC.nb_inst*sizeof(eNB_RRC_INST *));
LOG_I(PHY, "%s() RC.nb_inst:%d RC.rrc:%p\n", __FUNCTION__, RC.nb_inst, RC.rrc);
for (enb_id = enb_id_start; (enb_id < enb_id_end) ; enb_id++) {
RC.rrc[enb_id] = (eNB_RRC_INST *)malloc(sizeof(eNB_RRC_INST));
LOG_I(PHY, "%s() Creating RRC instance RC.rrc[%d]:%p (%d of %d)\n", __FUNCTION__, enb_id, RC.rrc[enb_id], enb_id+1, enb_id_end);
memset((void *)RC.rrc[enb_id],0,sizeof(eNB_RRC_INST));
configure_rrc(enb_id);
}
# if defined(ENABLE_USE_MME)
/* Try to register each eNB */
registered_enb = 0;
register_enb_pending = eNB_app_register (enb_id_start, enb_id_end);//, enb_properties_p);
#else
/* Start L2L1 task */
msg_p = itti_alloc_new_message(TASK_ENB_APP, INITIALIZE_MESSAGE);
itti_send_msg_to_task(TASK_L2L1, INSTANCE_DEFAULT, msg_p);
#endif
/* Try to register each eNB with each other */
// x2_registered_enb = 0;
x2_register_enb_pending = eNB_app_register_x2 (enb_id_start, enb_id_end);
do {
// Wait for a message
itti_receive_msg (TASK_ENB_APP, &msg_p);
instance = ITTI_MSG_INSTANCE (msg_p);
switch (ITTI_MSG_ID(msg_p)) {
case TERMINATE_MESSAGE:
LOG_W(ENB_APP, " *** Exiting ENB_APP thread\n");
itti_exit_task ();
break;
case MESSAGE_TEST:
LOG_I(ENB_APP, "Received %s\n", ITTI_MSG_NAME(msg_p));
break;
case S1AP_REGISTER_ENB_CNF:
# if defined(ENABLE_USE_MME)
LOG_I(ENB_APP, "[eNB %d] Received %s: associated MME %d\n", instance, ITTI_MSG_NAME (msg_p),
S1AP_REGISTER_ENB_CNF(msg_p).nb_mme);
DevAssert(register_enb_pending > 0);
register_enb_pending--;
/* Check if at least eNB is registered with one MME */
if (S1AP_REGISTER_ENB_CNF(msg_p).nb_mme > 0) {
registered_enb++;
}
/* Check if all register eNB requests have been processed */
if (register_enb_pending == 0) {
if (registered_enb == enb_nb) {
/* If all eNB are registered, start L2L1 task */
MessageDef *msg_init_p;
msg_init_p = itti_alloc_new_message (TASK_ENB_APP, INITIALIZE_MESSAGE);
itti_send_msg_to_task (TASK_L2L1, INSTANCE_DEFAULT, msg_init_p);
} else {
LOG_W(ENB_APP, " %d eNB not associated with a MME, retrying registration in %d seconds ...\n",
enb_nb - registered_enb, ENB_REGISTER_RETRY_DELAY);
/* Restart the eNB registration process in ENB_REGISTER_RETRY_DELAY seconds */
if (timer_setup (ENB_REGISTER_RETRY_DELAY, 0, TASK_ENB_APP, INSTANCE_DEFAULT, TIMER_ONE_SHOT,
NULL, &enb_register_retry_timer_id) < 0) {
LOG_E(ENB_APP, " Can not start eNB register retry timer, use \"sleep\" instead!\n");
sleep(ENB_REGISTER_RETRY_DELAY);
/* Restart the registration process */
registered_enb = 0;
register_enb_pending = eNB_app_register (enb_id_start, enb_id_end);//, enb_properties_p);
}
}
}
#endif
break;
case S1AP_DEREGISTERED_ENB_IND:
if (EPC_MODE_ENABLED) {
LOG_W(ENB_APP, "[eNB %d] Received %s: associated MME %d\n", instance, ITTI_MSG_NAME (msg_p),
S1AP_DEREGISTERED_ENB_IND(msg_p).nb_mme);
/* TODO handle recovering of registration */
}
break;
case TIMER_HAS_EXPIRED:
# if defined(ENABLE_USE_MME)
LOG_I(ENB_APP, " Received %s: timer_id %ld\n", ITTI_MSG_NAME (msg_p), TIMER_HAS_EXPIRED(msg_p).timer_id);
if (TIMER_HAS_EXPIRED (msg_p).timer_id == enb_register_retry_timer_id) {
/* Restart the registration process */
registered_enb = 0;
register_enb_pending = eNB_app_register (enb_id_start, enb_id_end);//, enb_properties_p);
}
#endif
break;
default:
LOG_E(ENB_APP, "Received unexpected message %s\n", ITTI_MSG_NAME (msg_p));
break;
}
result = itti_free (ITTI_MSG_ORIGIN_ID(msg_p), msg_p);
AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
} while (1);
#endif
return NULL;
}