Changes between Version 3 and Version 4 of WirelessVT2016/SoftLTE


Ignore:
Timestamp:
06/01/16 14:32:06 (5 years ago)
Author:
agosain@bbn.com
Comment:

--

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  • WirelessVT2016/SoftLTE

    v3 v4  
    1616Update for '''oai-develop.ndz''': The openair-cn (EPC) was installed with default passwords of '''oai''' and default choice of "Y" for optional packages (freeDiameter, asn1c pach and xtables_addons_oai). xtables_addons_oai was pulled out of git and installed.
    1717
    18 '''Note''' If you intend to use graphical user interface please make sure to install appropriate tools on your local machine and configure X11 forwarding
    1918 
    2019------------------------
    2120
    2221=== Quickstart Option ===
     22
     23'''Note''' If you intend to use graphical user interface please make sure to install appropriate tools on your local machine and configure X11 forwarding
     24
    2325We have an image available, named {{{oai-dev.ndz}}}. It has all the necessary driver and software pre-installed, and two scripts available to immediately boot up the eNB and UE. This quickstart assumes use of Sandbox1, nodes 1-1, and 1-2.
    2426
     
    4244
    4345
    44 --------------------------------
    4546
    46 The code was compiled with USRP support i.e. with:
    47 {{{
    48 cd trunk/targets/bin; build_oai.bash -l ENB -c -w USRP
    49 }}}
    50 More details on various build options are available on [https://twiki.eurecom.fr/twiki/bin/view/OpenAirInterface/AutoBuild OpenAirInterface build page].
    51 
    52 In this tutorial we will use nodes with USRP b310 and have the basestation on node9-1 and modem on node6-20.
    53 
    54 
    55 
    56 
    57 === Prepare the nodes ===
    58 
    59  1. Load the image with the !OpenAirInterface code on the nodes that have USRP B210 attached. After imaging the nodes are '''turned off automatically'''.
    60 
    61  omf load -t inventory:topo:B210 -i oai-master.ndz
    62 
    63  1. Turn ON the nodes that successfully imaged (give them some time and check their status with '''omf stat''' before proceeding).
    64 
    65   omf tell -a on -t system:topo:imaged
    66 
    67 === Execute the experiment ===
    68 
    69 Primary objective is to establish the LTE connection between the UE and eNB. In order to that we need to prepare configuration files on two nodes: node9-1 and node6-20.
    70   1. '''ssh into nodes:''' Open the two ssh sessions from the console to the two nodes
    71 
    72   2. '''Prepare configuration files:''' Make sure to have correct parameters in oai.conf file in roots home directory on the node (/root) as follows:
    73      i. Operating frequency band parameters:
    74           a. E-UTRA band
    75           b. Corresponding duplex mode (e.g. FDD/TDD),
    76           c. Downlink frequency [Hz], uplink frequency offset [Hz] (which is given in reference to the downlink frequency).
    77           d. LTE bandwidth: N_RB_DL = {6,15,25,50,75,100} corresponding to bandwidth = {1.4,3,5,10,15,20} MHz
    78           For example:
    79           {{{
    80     ////////// Physical parameters:
    81     component_carriers = (
    82                          {
    83                            frame_type                                         = "FDD";
    84                            eutra_band                                         = 7;
    85                            downlink_frequency                                 = 2660000000L;
    86                            uplink_frequency_offset                            = -120000000;
    87                            N_RB_DL                                            = 25; #N_RB_DL choice: 6,15,25,50,75,100
    88                          }
    89                          );
    90           }}}
    91           In this example, LTE operates in E-UTRA band 7 which allows the FDD mode. LTE operates at 5 MHz bandwidth around downlink and uplink center frequencies which are at 2660 MHz and 2540 MHz, respectively.
    92 
    93           Parameters in oai.conf can be varied as long as they are within predefined set of values which can be found in file ~/rel_0.1_26.10.2014/openair2/ENB_APP/enb_config.c or ~/trunk/openair2/ENB_APP/enb_config.c
    94 
    95      ii. Make sure to have correct IP address configuration for parameters "ENB_IPV4_ADDRESS_FOR_S1_MME" and "ENB_IPV4_ADDRESS_FOR_S1U" to match node numbers.   For example, for nodeX-Y, these IP address parameters become as "10.10.X.Y/16". So for our basestation node the relevant sections in the oai.conf file in /root directory on the nodes we should look like (we don't want MME support and have to adjust the ip addresses to match what we have on the control interface of the node):
    96      {{{
    97     ////////// MME parameters:
    98     mme_ip_address      = ( { ipv4       = "10.10.0.100";
    99                               ipv6       = "10:10:0::100";
    100                               active     = "no";
    101                               preference = "ipv4";
    102                             }
    103                           );
    104 
    105     NETWORK_INTERFACES :
    106     {
    107         ENB_INTERFACE_NAME_FOR_S1_MME            = "eth1";
    108         ENB_IPV4_ADDRESS_FOR_S1_MME              = "10.10.9.1/24";
    109 
    110         ENB_INTERFACE_NAME_FOR_S1U               = "eth1";
    111         ENB_IPV4_ADDRESS_FOR_S1U                 = "10.10.9.1/24";
    112         ENB_PORT_FOR_S1U                         = 2152; # Spec 2152
    113     };
    114      }}}
    115   3. '''Run the lte-softmodem:''' Depending on whether you want to run it with or without mme, execute lte-softmodem on corresponding nodes:
    116 
    117  || || On the eNB node (node9-1) || On the UE node (node6-20)  ||
    118  || w/o MME || {{{ lte-softmodem-nomme -Ooai.conf -V}}} || {{{ lte-softmodem -U -Ooai.conf -C 2660000000 -V}}} ||
    119  || w MME || {{{ lte-softmodem -Ooai.conf -V}}} || {{{ lte-softmodem -U -Ooai.conf -C 2660000000 -V}}} ||
    120 
    121 If the above commands are executed with the "-d" flag and if X11 forwarding is enabled for the current ssh session, the signal tracer will pop out as shown in Figure 1 (not that this requires relatively high bandwidth).
    122 [[Image(Scope.png, width=300)]] ||
    123 
    124 The output on both consoles should look something like this:
    125 {{{
    126 [RRC][I][eNB 0] Init (UE State = RRC_IDLE)...
    127 [RRC][I][eNB 0] Checking release
    128 [RRC][I][eNB 0] Rel8 RRC
    129 [RRC][I][eNB 0] Configuration SIB2/3
    130 [MAC][I][rrc_mac_config_req] [CONFIG][eNB 0] Configuring MAC/PHY
    131 [MAC][I][rrc_mac_config_req] [CONFIG]SIB2/3 Contents (partial)
    132 [MAC][I][rrc_mac_config_req] [CONFIG]pusch_config_common.n_SB = 1
    133 [MAC][I][rrc_mac_config_req] [CONFIG]pusch_config_common.hoppingMode = 0
    134 [MAC][I][rrc_mac_config_req] [CONFIG]pusch_config_common.pusch_HoppingOffset = 0
    135 [MAC][I][rrc_mac_config_req] [CONFIG]pusch_config_common.enable64QAM = 0
    136 [MAC][I][rrc_mac_config_req] [CONFIG]pusch_config_common.groupHoppingEnabled = 1
    137 [MAC][I][rrc_mac_config_req] [CONFIG]pusch_config_common.groupAssignmentPUSCH = 0
    138 [MAC][I][rrc_mac_config_req] [CONFIG]pusch_config_common.sequenceHoppingEnabled = 0
    139 [MAC][I][rrc_mac_config_req] [CONFIG]pusch_config_common.cyclicShift  = 1
    140 [RRC][I][eNB 0] OPENAIR RRC IN....
    141 [SCTP][I][sctp_handle_new_association_req] Setsockopt SOL_SOCKET socket bound to : eth1
    142 [SCTP][I][sctp_handle_new_association_req] Converted ipv4 address 10.10.0.100 to network type
    143 [SCTP][I][sctp_handle_new_association_req] connectx assoc_id  1 in progress..., used 1 addresses
    144 [SCTP][I][sctp_handle_new_association_req] Inserted new descriptor for sd 56 in list, nb elements 1, assoc_id 1
    145 [SCTP][I][sctp_eNB_flush_sockets] Found data for descriptor 56
    146 [SCTP][I][sctp_eNB_read_from_socket] Received notification for sd 56, type 32769
    147 [SCTP][I][sctp_eNB_read_from_socket] Client association changed: 0
    148 [SCTP][I][sctp_get_peeraddresses] ----------------------
    149 [SCTP][I][sctp_get_peeraddresses] Peer addresses:
    150 [SCTP][I][sctp_get_peeraddresses]     - [10.10.0.100]
    151 [SCTP][I][sctp_get_peeraddresses] ----------------------
    152 [SCTP][I][sctp_get_sockinfo] ----------------------
    153 [SCTP][I][sctp_get_sockinfo] SCTP Status:
    154 [SCTP][I][sctp_get_sockinfo] assoc id .....: 1
    155 [SCTP][I][sctp_get_sockinfo] state ........: 3
    156 [SCTP][I][sctp_get_sockinfo] instrms ......: 8
    157 [SCTP][I][sctp_get_sockinfo] outstrms .....: 64
    158 [SCTP][I][sctp_get_sockinfo] fragmentation : 1452
    159 [SCTP][I][sctp_get_sockinfo] pending data .: 0
    160 [SCTP][I][sctp_get_sockinfo] unack data ...: 0
    161 [SCTP][I][sctp_get_sockinfo] rwnd .........: 106496
    162 [SCTP][I][sctp_get_sockinfo] peer info     :
    163 [SCTP][I][sctp_get_sockinfo]     state ....: 2
    164 [SCTP][I][sctp_get_sockinfo]     cwnd .....: 4380
    165 [SCTP][I][sctp_get_sockinfo]     srtt .....: 0
    166 [SCTP][I][sctp_get_sockinfo]     rto ......: 3000
    167 [SCTP][I][sctp_get_sockinfo]     mtu ......: 1500
    168 [SCTP][I][sctp_get_sockinfo] ----------------------
    169 [SCTP][I][sctp_eNB_read_from_socket] Comm up notified for sd 56, assigned assoc_id 1
    170 [S1AP][I][s1ap_eNB_generate_s1_setup_request] 3584 -> 00e000
    171 [SCTP][I][sctp_send_data] Successfully sent 53 bytes on stream 0 for assoc_id 1
    172 [SCTP][I][sctp_eNB_flush_sockets] Found data for descriptor 56
    173 [SCTP][I][sctp_eNB_read_from_socket] Received notification for sd 56, type 32777
    174 [SCTP][I][sctp_eNB_flush_sockets] Found data for descriptor 56
    175 [SCTP][I][sctp_eNB_read_from_socket] [1][56] Msg of length 27 received from port 36412, on stream 0, PPID 18
    176 [S1AP][I][s1ap_decode_s1ap_s1setupresponseies] Decoding message S1ap_S1SetupResponseIEs (/root/trunk/targets/RT/USER/objs/openair-cn/S1AP/s1ap_decoder.c:3544)
    177 [ENB_APP][I][eNB_app_task] [eNB 0] Received S1AP_REGISTER_ENB_CNF: associated MME 1
    178 Waiting for eNB application to be ready
    179 [HW][I][SCHED] eNB TX thread 0 started on CPU 5
    180 [HW][I][SCHED][eNB] eNB RX thread 0 started on CPU 0
    181 [HW][I][SCHED] eNB TX thread 1 started on CPU 0
    182 [HW][I][SCHED][eNB] eNB RX thread 1 started on CPU 5
    183 [HW][I][SCHED] eNB TX thread 2 started on CPU 2
    184 [HW][I][SCHED][eNB] eNB RX thread 2 started on CPU 0
    185 [HW][I][SCHED] eNB TX thread 3 started on CPU 5
    186 [HW][I][SCHED][eNB] eNB RX thread 3 started on CPU 5
    187 [HW][I][SCHED] eNB TX thread 4 started on CPU 4
    188 [HW][I][SCHED][eNB] eNB RX thread 4 started on CPU 1
    189 [HW][I][SCHED] eNB TX thread 5 started on CPU 4
    190 [HW][I][SCHED][eNB] eNB RX thread 5 started on CPU 4
    191 [HW][I][SCHED] eNB TX thread 6 started on CPU 0
    192 [HW][I][SCHED][eNB] eNB RX thread 6 started on CPU 1
    193 [HW][I][SCHED] eNB TX thread 7 started on CPU 1
    194 [HW][I][SCHED][eNB] eNB RX thread 7 started on CPU 0
    195 [HW][I][SCHED] eNB TX thread 8 started on CPU 1
    196 [HW][I][SCHED][eNB] eNB RX thread 8 started on CPU 0
    197 [HW][I][SCHED] eNB TX thread 9 started on CPU 0
    198 [HW][I][SCHED][eNB] eNB RX thread 9 started on CPU 1
    199 Creating main eNB_thread
    200 [SCHED][eNB] Started eNB main thread on CPU 4
    201 eNB_thread: mlockall in ...
    202 eNB_thread: mlockall out ...
    203 waiting for sync (eNB_thread)
    204 TYPE <CTRL-C> TO TERMINATE
    205 Entering ITTI signals handler
    206 
    207 }}}
    208 
    209 
    210 
    211 === The command line parameters of lte-softmodem ===
    212 Relevant (i.e. for USRP command line parameters for the lte-softmodem command are:
    213  * -O file: eNB configuration file (this is the preferred way to pass basic parameters and there are several examples in $OPENAIR_TARGETS/PROJECTS/GENERIC-LTE_EPC/CONF/
    214  * -g LEVEL: set the level of debug for the log generation (-g7 is quite high and useful to trace bugs in the procedures/protocols, -g9 even dumps packets at all levels of the protocol stack)
    215  * -d: enables xforms signal tracer
    216  * -U: start as UE (default: eNB)
    217  * -C freq: set carrier frequency to f0 for all chains (extension to independent frequencies trivial)
    218  * -V: enables the VCD debugging tool (this is a temporal event tracer, which is useful for real-time debugging using GTKWave)
    219  * -K file: ITTI logfile. ITTI is an intertask tracing utility which helps debugging with an EPC. It can traces all exchanges between RRC<->S1AP, RRC<->PDCP, PDCP<->S1
    220  * -S: do not exit for the missing slots, instead increment the counter.
    221  * --debug-ue-prach: only send prach but do not connect
    222  * --no-L2-connect: only runs rx, does not send prach
    223 
    224 More details on running lte-softmodem are available on [https://twiki.eurecom.fr/twiki/bin/view/OpenAirInterface/OpenAirLXRT OpenAirInterface real-time LTE softmodem page].