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2020-10-26sched_lchan_tchf: count measurements for FACCH/F only oncePhilipp Maier1-0/+10
When the FACCH is generated (while in SPEECH mode), there is also a fake speech indication handed up to l1sap.c. We must make sure that only one of the two indications carry a measurement value, so lets invalidate the measurement values (RSSI in particular) for the generated TCH indication. Change-Id: Ie3f2e620ba2a2ab2fecdbae627ef01c6128fce0b Related: OS#4799
2020-10-24main: add --vty-ref-mode, use vty_dump_xml_ref_mode()Vadim Yanitskiy1-10/+32
Change-Id: I744520199ef448ff095d0fe703d79ac08f08f7fe Depends: Ie2022a7f9e167e5ceacf15350c037dd43768ff40 Related: SYS#4910
2020-10-24main: separate model-specific arguments in helpVadim Yanitskiy4-3/+6
Change-Id: I9646a45d61153499ad3d580a03d930ed20e23cda
2020-10-24main: increase spacing between commands and descriptionVadim Yanitskiy5-20/+22
Otherwise it's hard to fit new options with long names. Change-Id: If9a418545abff6d22602ba07cfd4447f5ace7742 Related: SYS#4910
2020-10-24main: do not print deprecated '-r' / '--realtime' in helpVadim Yanitskiy1-1/+0
Change-Id: I516a71124a49f6d6adb6db939a91da07576e63e7
2020-10-23cosmetic: add missing semicolon after OSMO_ASSERT()Philipp Maier1-1/+1
Change-Id: Ib886115418939990ecfb6ecc1a4528f7a015b913
2020-10-21oml: Set NM_OPSTATE_DISABLED by defaultPau Espin Pedrol2-4/+4
Otherwise, some objects are announced at startup of osmo-bts towards BSC during State Changed Report as being "NULL". According to TS 12.21: "NULL(Operat. state not supported) FF" Which doesn't make much sense in startup situation. They are in known state Disabled until they are OPSTARTed. Change-Id: I5ba6756ea069d0f995f453ee4b27e6839c914eb1
2020-10-21bts_trx.c: Dispatch missing NM_EV_RSL_UP/DOWN to the bb_transc objectPau Espin Pedrol1-0/+1
Previous commit 7810a917331b33b6cfab5259b5fb2df73b27b230 forgot to introduce this line, though it was planned to be there. Most of the time it worked fine anyway because the RSL link is not the last event bb_transc waits for before switching to Enabled, so later events would trigger inside the bb_transc fsm a recheck (polling) which wuld allow to advance to Enabled state. However, in the situation where RSL link UP is the last event to happen, no more inside-FSM checks are triggered and hence BB Transeiver never goes to Enabled state, and as a result no event is triggered towards each RadioChannel which in turn don't go to Enabled state. Fixes: 7810a917331b33b6cfab5259b5fb2df73b27b230 Change-Id: I8c777b946e7abcb4b607ec4d136c981a0716b120
2020-10-20power_control: fix default EWMA smoothing coefficient (80% -> 50%)Vadim Yanitskiy1-1/+1
80% (alpha=0.2) is clearly too much, let's use 50% (alpha=0.5). Change-Id: Ib7aec6c7223ffb2d4a312eee77247925beb8c905 Fixes: Ib6dcadbf14ef59696c6a546bd323bda92d399f17 Related: SYS#4916
2020-10-20Introduce NM Channel FSMPau Espin Pedrol17-138/+373
Change-Id: I288cbfb4730b25a334ef1c3d6b9679d6f1d4cfc5
2020-10-20Introduce NM Radio Carrier and Baseband Transceiver FSMsPau Espin Pedrol17-157/+601
All the Operative State logic to manage a RadioCarrier//BBTransc NM objects is centralized in these FSM, where other parts of the code simply send events to it. This allows keeping state consistent and offloading logic from each bts backend, since they are only required to submit events now. The idea in the long run is to also replace other NM objects with similar FSMs. This improved logic fixes bug where PHY + RSL link became available before OPSTART and hence op state changed to Enabled before receiving any OPSTART message. Change-Id: Ifb249a821c4270918699b6375a72b3a618e8cfbe
2020-10-20Introduce NM BTS FSMPau Espin Pedrol10-24/+186
Change-Id: Iae631bcc7acdf955296b124707e42d5e565af186
2020-10-20Introduce NM BTS Site Manager FSMPau Espin Pedrol11-12/+226
This fixes old behavior mimicing broken behavior in nanoBTS (according to TS 12.21) where BTS Site Mgr NM object was announced as Enabled despite no OPSTART was sent by the BSC. With this new FSM, BTS SiteManager will be announced as Disabled Offline during OML startup conversation, instead of Enabled. The new osmo-bsc OML management FSMs use this change in behavior to find out whether it should use the old broken management states (without Offline state, as per nanoBTS) or use the new state transitions (which allow fixing several race conditions). Change-Id: Iab2d17c45c9642860cd2d5d523c1baae24502243
2020-10-20Change NM Channel availability Dependency->Offline when RadioCarrier becomes ↵Pau Espin Pedrol7-0/+83
enabled This fix allows osmo-bts to play fine with newer osmo-bsc NM OML FSMs, which expectes for non-nanoBTS types to follow TS 12.21 guidelines. Until now, BSC simply waited to received State Event Change Dependency for each TS and then sent all required commands (Set Chan Attr, Adm Unlock and Opstart). In newer osmo-bsc FSMs, Opstart is only sent when in Offline state, so we need to transit to that state. For the above mentioned reason, since we pass through the Dependency state anyway after this patch, older osmo-bscs will work correctly too. Change-Id: Id9e61f8d773e6e6170c68b5b836d276c747d8d69
2020-10-19remove dead oml_router codeHarald Welte12-468/+6
We originally wanted to intrdouce an OML router which would permit external proceses to implement certain OML MOs. However, that code was never completed, and all the existing implementation (in three copies) does is to create a unix domain socket and discard what is received there. Change-Id: I7fcbbd5d6b64ddc666ca836dc49abb430be0d5cb
2020-10-19use osmo_fd_setup() everywhereHarald Welte10-62/+18
Change-Id: I9be55f791a15fae2362dc431dc778b9b9d8db349
2020-10-19scheduler: remove pending Tx prims on lchan deactivationVadim Yanitskiy1-0/+34
Sometimes the following messages appear in the logging output: TCH/F: Prim has wrong chan_nr=0xc5 link_id=00, expecting chan_nr=0x0d link_id=00 TCH/F: Prim has wrong chan_nr=0xc2 link_id=00, expecting chan_nr=0x0a link_id=00 when a dynamic timeslot is switched from PDCH to TCH/F (or to TCH/H). This means that the transmit queue of a timeslot still contains PDCH frames, that were not properly cleaned on PDCH deactivation. Let's finally do this in trx_sched_set_lchan(). Change-Id: Ic6560c660c658f36b84e7efa2f1d93e3a870962b Related: SYS#5108, OS#4804
2020-10-19scheduler: join conditions in trx_sched_set_lchan()Vadim Yanitskiy1-5/+7
Change-Id: If2b68e3c7bf01badaaa4666198a4a4c5709f0040
2020-10-19scheduler: treat subsequent lchan (de)activation as errorVadim Yanitskiy1-4/+4
Trying to (de)activate logical channels that are already (de)activated is not something that we normally expect. Treat this as error. Change-Id: I6256280cae35b2b4d7a8ba4b3913ca69cde22611
2020-10-19scheduler: reduce nesting in trx_sched_set_lchan()Vadim Yanitskiy1-28/+30
Change-Id: I476dabb059325058a4327bb96430ce6ade199580
2020-10-19scheduler: get rid of useless TRX_CHAN_FLAG_PDCHVadim Yanitskiy1-2/+0
Change-Id: I951ec9b02be674936fbd0bf2e75b004813e25197
2020-10-19scheduler: drop redundant check in trx_sched_set_cipher()Vadim Yanitskiy1-3/+0
In this function we already do check that a given timeslot is not a PDCH slot, so checking if TRX_CHAN_FLAG_PDCH is redundant. Change-Id: Ie73bdaf0f6bc76ed8d2e95d1fb995333bf617e7e
2020-10-19scheduler: drop meaningless check in trx_sched_set_lchan()Vadim Yanitskiy1-5/+0
Both TRXC_PDTCH or TRXC_PTCCH are described in 'trx_chan_desc' (defined as 'const'), and both have TRX_CHAN_FLAG_PDCH set. So indeed, this condition can never be true. Change-Id: Ie185a939b48eb859ac1c8ffa0a4f667fda0cb82b
2020-10-19scheduler: use RSL_CHAN_NR_MASK in trx_sched_set_cipher()Vadim Yanitskiy1-1/+1
Change-Id: I26fb115ce0a7c33453b05c8fcee8a21d1a2a97d5
2020-10-19power_control: tolerate small deviations from 'rx-target'Vadim Yanitskiy3-8/+35
Recently we've introduced EWMA based uplink power filtering, that should reduce Uplink power oscillations. However, the power loop is still quite sensitive to small deviations from the target power level: even such an insignificant deviation like 2-5 dBm triggers the loop to increase or decrease the MS power level. Even if the EWMA based filtering is enabled with 80% smoothing (alpha = 0.2). This change introduces a new configuration parameter - 'hysteresis': uplink-power-target <-110-0> hysteresis <1-25> that together with the 'uplink-power-target' defines a range: [target - hysteresis .. target + hysteresis] in which the MS power loop would not trigger any power changes. This feature is now *enabled* by default, so given that: - default 'uplink-power-target' is -75 dBm, and - default 'hysteresis' is 3 dBm, the default target Uplink power range is: -78 dBm ... -72 dBm. Change-Id: Iacedbd4d69d3d74e2499af5622a07a8af0423da0 Related: SYS#4916
2020-10-19power_control: do nothing if 'rx-current' equals 'rx-target'Vadim Yanitskiy1-0/+13
It makes no sense to do further calculations if the actual Uplink signal strength equals the target value configured in the VTY. Change-Id: Id99c7013a722403e773df8367b1a9d7a856e639b Related: SYS#4916
2020-10-18measurement: use LOGPLCHAN() macro in lchan_meas_check_compute()Vadim Yanitskiy1-32/+32
Change-Id: Ia73fd766ddce3fd03d0f45b72cb2d056fae781fc
2020-10-18measurement: remove redundant 'break' statements in modulus_by_lchan()Vadim Yanitskiy1-3/+0
Change-Id: I24597dbdaa692f855be014c536f5758b8e503688
2020-10-17scheduler: use RSL_CHAN_NR_MASK in trx_sched_set_lchan()Vadim Yanitskiy1-1/+1
Change-Id: I3dd2c90f510444cda38516bd9a1a207877bebadc
2020-10-17scheduler: _sched_dequeue_prim(): make 'l1sap' a scoped pointerVadim Yanitskiy1-2/+1
Change-Id: Ia2d1098e25d0bbe39fd7e98eb7c96d43a32073df
2020-10-17scheduler: ensure PRIM_OP_REQUEST when adding to the queueVadim Yanitskiy1-4/+2
Change-Id: I709ba2394862fcb0f86484792b5f8d3b338b42cc
2020-10-16fix pcu_if_signal_cb(): do not send INFO.ind if PCU is not connectedVadim Yanitskiy1-0/+4
Sending INFO.ind unconditionally in pcu_if_signal_cb() provokes a lot of warnings during OML bootstrapping / termination: DPCU INFO pcu_sock.c:247 Sending info DPCU INFO pcu_sock.c:262 BTS is up DPCU INFO pcu_sock.c:205 (bts=0,trx=0) unavailable for PCU (op=Disabled adm=Unlocked) DPCU INFO pcu_sock.c:205 (bts=0,trx=1) unavailable for PCU (op=Disabled adm=Unlocked) Do not call pcu_tx_info_ind() if the PCU is not connected. Change-Id: If8bc8bec5ad808be8d40e91278a4a4fde84920b0
2020-10-15power_control: implement EWMA based Uplink power filteringVadim Yanitskiy3-3/+118
So far the Uplink power control loop did not filter the Uplink RSSI measurements (reported by the BTS) at all. The lack of filtering makes our implementation too quick on the trigger, so in the real deployments there will be unneeded Tx power oscillations. In order to reduce this effect, let's implement a very simple EWMA (also known as Single Pole IIR) filtering that is defined as follows: Avg[n] = a * Pwr[n] + (1 - a) * Avg[n - 1] where parameter 'a' determines how much weight of the latest UL RSSI measurement result 'Pwr[n]' carries vs the weight of the average 'Avg[n - 1]'. The value of 'a' is usually a float in range 0 .. 1, so: - value 0.5 gives equal weight to both 'Pwr[n]' and 'Avg[n - 1]'; - value 1.0 means no filtering at all (pass through); - value 0.0 makes no sense. This formula was further optimized with the use of '+=' operator. The floating point math was also eliminated by scaling everything up (by 100). For more details, see: https://en.wikipedia.org/wiki/Moving_average https://en.wikipedia.org/wiki/Low-pass_filter#Simple_infinite_impulse_response_filter https://tomroelandts.com/articles/low-pass-single-pole-iir-filter The EWMA filtering is now *enabled by default*, but can be disabled or (re-)configured over the VTY at any time: ! Completely disable filtering no uplink-power-filtering ! Enable EWMA smoothing with the given parameters uplink-power-filtering algo ewma beta <1-99> Note that the VTY command expects 'beta' instead of 'alpha': alpha = (100 - beta) and the value must be in %. This is done for simplicity: 1% means lowest smoothing, 99% means highest smoothing. Let's say we have EWMA filtering enabled with alpha = 0.4, and get -98 dBm on the input, while the last output value was -60 dBm. The new output would be: Avg[n] = 0.4 * Pwr[n] + 0.6 * Avg[n - 1] Avg[n] = (0.4 * -98) + (0.6 * -60) Avg[n] = -75.2 => around -75 Of course, this is not a silver bullet, but better than nothing. Change-Id: Ib6dcadbf14ef59696c6a546bd323bda92d399f17 Related: SYS#4916
2020-10-15sysinfo: Don't broadcast SI4 GPRS INDICATOR if PCU is disconnectedHarald Welte3-7/+51
Depends: libosmocore.git I9d6ed06731ae15fdcef1a1f397d6ac2b7b1ca980 Change-Id: I1fd513ea03297918d15d4b28ed454f9b6dd6ebfa Related: OS#3075
2020-10-15power_control: clarify argument names of lchan_ms_pwr_ctrl()Vadim Yanitskiy1-5/+6
Change-Id: I821120bf5c3690f5b4c6b96c879e675b3d271c90
2020-10-15sysinfo: Only send SI13 if PCU is connectedHarald Welte1-1/+1
If no PCU is connected, we cannot be providing GPRS services, and hence should not transmit SI13. Change-Id: I54320cf8073a33ed9e35b365921df178005e8967 Closes: OS#3075
2020-10-13Drop unused param in oml_init()Pau Espin Pedrol2-2/+2
Change-Id: I96d8359f4ae13c9f47cc87d87fde6d2047169a49
2020-10-10pcu_sock: support handling multiple BTS instances in pcu_rx()Vadim Yanitskiy1-3/+1
Change-Id: Icd19f803dc69138bf2fb1b0e1389b7ce1c8a9b1f
2020-10-09main: add commandline option --vty-ref-xmlPhilipp Maier1-0/+12
The commandline option --vty-ref-xml is needed to enable automatic generation of the VTY reference manual. Change-Id: I895db6086748a5916874e779963caed589050109 Related: SYS#4937, OS#1601
2020-10-09pcu_sock: fix {local,remote}_port byte ordering in pcu_tx_info_ind()Vadim Yanitskiy1-2/+4
The PCUIF is a 'brilliant' protocol: some fields are expected to be in the network byte order, some in the host order. The NSVC remote address and local/remote ports is a good example: - byte order of the address must be the network order, and - byte order of the ports must be the host order. Change-Id: I383cab0b58b62734090023298da8c5a341c670d5 Fixes: I310699fabbfec4255f0474f31717f215c1201eca Related: SYS#4915
2020-10-08oml: fix handling of NSVC local port in oml_ipa_mo_set_attr_nsvc()Vadim Yanitskiy1-1/+1
This is another regresion introduced by [1]. Both local and remote port numbers recived in the network order, and must be stored as-is. Change-Id: I3c21a2c27dcbf6de728ce2c7ccbae9e2f517c450 Fixes: I310699fabbfec4255f0474f31717f215c1201eca Related: SYS#4915
2020-10-08pcu_sock: fix pcu_sock_close(): deactivate dynamic timeslots tooVadim Yanitskiy1-8/+9
Change-Id: Ib0efa6e1e2a68ac9675a18487b79d9b14bdb22c5 Fixes: OS#4785
2020-10-08pcu_sock: use llist_for_each_entry() in pcu_sock_close()Vadim Yanitskiy1-8/+5
Using gsm_bts_trx_num() involves redundant iterations over the list of transceivers - we definitely don't want them. Change-Id: I4bd40ffcc1e925412a21b0a934bbfdeddbc6ad1f
2020-10-08sched_lchan_tchh: initialize meas_avg with zerosPhilipp Maier1-0/+1
in function rx_tchh_fn() the variable meas_avg is not initalized. This is not always a problem, since most of the time trx_sched_meas_avg() is populating the variable properly. In cases where a FACCH is transmitted (chan_state->ul_ongoing_facch = true) the variable is left unpopulated. In order to have at least stable values for those cases, initalize the variable with zeros for the ongoing facch phase. Change-Id: I5c3c1c41d22f9edaaf6bd4478dd04f090dca12a9 Fixes: CID#214480
2020-10-09pcu_sock: cosmetic: make *nsvc a scoped and const variableVadim Yanitskiy1-2/+1
Change-Id: I707bb75f15ccaee5c67fa4a7e87dc70c9b982973
2020-10-09pcu_sock: cosmetic: use ARRAY_SIZE() in pcu_tx_info_ind()Vadim Yanitskiy1-1/+1
Change-Id: I272ceb09a3e8cac0082dbec3a034776da71d9366
2020-10-08vty: fix 'show bts' command: BTS number is optionalVadim Yanitskiy1-3/+3
Change-Id: If53fb07ec38f6bbc368ce84d14e59fa8167691d3
2020-10-08vty: fix 'show bts' command: print proper BTS variantVadim Yanitskiy1-2/+3
Change-Id: I24fc66175f79fe64400371e27b23556054c48dfe
2020-10-08vty: add attributes to VTY commands indicating when they applyPhilipp Maier2-156/+201
Change-Id: Ifcdfcd157e5067fa2e4296d7c7e93a74087f49ff Related: SYS#4937, OS#1601
2020-10-08OML: correct parse the NM_ATT_OSMO_NS_LINK_CFG field address_familyAlexander Couzens1-2/+3
The address_family is 8 bit and have a padding byte afterwards. By using osmo_load16be it's encoding it wrong and result in an empty/invalid NSVC configuration. Change-Id: Ie070b5745124d48e74a6dedd8903b74bfb3ce9d2
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