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In PCUIF v.11 we use PCU_IF_SAPI_AGCH_2 exclusively. We use this SAPI
to transfer IMMEDIATE ASSIGNMENT messages for uplink and downlink. One
new feature of PCU_IF_SAPI_AGCH_2 is that the PCU may ask to send a
confirmation when the MAC block is sent.
CAUTION: This patch breaks compatibility to current master osmo-pcu (See
also "Depends")
Related: OS#5927
Depends: osmo-pcu.git I9effdcec1da91a6e2e7a7c41f95d3300ad1bb292
Change-Id: I709c27adaf09a6766cfde4d76d878626d30ebb3c
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Since osmo-bsc uses RSL (with a propritary Ericsson RBS specific
extension) to send a confirmed IMMEDIATE ASSIGNMENT messages via
PCH, we can not just forward the MAC blocks into the paging queue
without determining whether the MAC block is a PAGING message or an
IMMEDIATE ASSIGNMENT message. the reason for this is that RSL uses
two different message types (IMMEDIATE ASSIGNMENT COMMAND and PAGING
COMMAND) to process IMMEDIATE ASSIGNMENT and PAGING messages.
This means we have to look into the MAC block to make sure whether
the message is a PAGING message or an IMMEDIATE ASSIGNMENT message.
We also need to make sure that the confirm flag is properly executed.
In the case of the IMMEDIATE ASSIGNMENT this means we have to include
(confirm=true) or not include (confirm=false) the RSL_IE_ERIC_MOBILE_ID
into the IMMEDIATE ASSIGNMENT COMMAND message.
In the case of PAGING we directly echo a confirmation after sending
the PAGING COMMAND via RSL when a confirmation is requested.
Related: OS#5927
Depends: osmo-pcu.git Ia202862aafc1f0cb6601574ef61eb9155de11f04
Change-Id: I3d2842626b7e8325860ea3160c7d900d39e953a0
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The previous amount of 10 messages may be small if the BSC is processing
lots of measurements from lots of BTS connected to it.
Increase it to 100 by default, and allow changing the write_queue length
through the VTY.
Related: SYS#6550
Change-Id: Ib2e3591498c038b8e59f3ad447ac1f65928d6da8
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Since we now no longer refer to TLLI when we mean "message ID" (msg_id),
we should also remove the "_DT" / "_dt" suffix from structs and define
constants and replace it with "_2" if required.
Depends: osmo-pcu.git If641b507dcb6b176109c99dce7cff2a7561364b0
Change-Id: I628aaf19999a0004d0760d25ecd323cdbc0076f5
Related: OS#5927
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The struct gsm_pcu_if_data_cnf_dt was added when the first experiments
mit Ericsson RBS base stations were made. It is essentially a copy of
gsm_pcu_if_data, where the mamber "data" was replaced with a member
"msg_id" (which was originally called "tlli"). Since we didn't know
back then which parameters we would still need at some later point we
kept all the other parameters. However, to this day we never used the
parameters below fn. Even fn was only used for logging purposes, but is
now also unused.
Let's remove all those unused members.
(Since all removed members are at the tail of the struct,
compatibility with other programs that use the PCUIF should not break.)
Change-Id: I37845408edd96017b50559964c82b2cdc5e143a7
Related: OS#5927
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To confirm downlink IMMEDIATE ASSIGNMENT messages, we use the TLLI as an
identifier and the related struct member is also called "tlli".
Unfortunately this is misleading since the message identifier does not
necessarly have to be a TLLI. It is just an implementation detail that
osmo-pcu uses the TLLI as a message identifier.
To make that clear, lets rename the tlli member (and variable and
parameter names where it is passed on) to "msg_id".
(Since this change only renames variables and struct members it will not
break compatibility with other programs that use the PCUIF)
Related: OS#5927
Depends: osmo-pcu.git I4a25039dfe329e68879bc68936e49c4b190625e6
Change-Id: Ifb3f257099b52c50e525768484f9e93282089d0f
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struct lchan_activate_info and struct lchan_modify_info use an enum to
define, if the channel type is for a normal channel, a VAMOS channel or
a VGCS/VBS channel.
Change-Id: I21167eb4192c02cd7b5e1574cddb382a3feaebe0
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The assignment is triggered by the MSC by sending an ASSIGNMENT REQUEST
with a group call reference. The reference is used to find the VGCS/VBS
channel that belogs to the referenced call.
The existing VGCS/VBS channel is reactivated. This will put the channel
into a state where the MS can establish the link on it, to complete the
assignment. The old connection is released by the MSC and assignment
completion is handled by the VGCS FSM.
Change-Id: Idaa864cd5ce4df6c3193494ce12d91523c104d89
Related: OS#4852
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Channel release is sent to MS that is in dedicated mode on the main
DCCH. Additionally it is sent as unit data on a VGCS/VBS to notify all
listeners that the channel has been released. All listeners return to
IDLE mode.
Change-Id: Ib777fe98c8ce2342082d88d227b796167d92cfe1
Related: OS#4852
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Change-Id: Id9e94fb4f27bb438b7093c031344a3400bfa34f1
Related: OS#4852
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Change-Id: Ia27e0ebb5bf7edb1b9f84999cafc028231b9489f
Related: OS#4852
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This is required to send UPLINK FREE and UPLINK BUSY messages to the
BTS.
Change-Id: I25e80f079989a4c7dede58c327c22b958784f3ff
Related: OS#4852
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A VGCS channel must not release, if all SAPIs (including 0) are
released. lchan FSM will ignore this.
Change-Id: Ief1e1894362c4917f6e0092268690f68c8193750
Related: OS#4852
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Change-Id: I4714fa4ff2b1327183a365223a3e3d89ae0357f7
Related: OS#4852
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Rename _gsm0808_ass_compl_extend_osmux() to gsm0808_extend_osmux().
This IE is also used for VGCS/VBS assignment command that is located in
a different file.
Change-Id: I1452cabb142f9e7a169f4ddfeac85908abaf8dfc
Related: OS#4852
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Change-Id: Ie3d8ad1ea8325c13759838d8083c6e47a0f54497
Related: OS#4852
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"enum lchan_select_reason" gets a new selection reason: "SELECT_FOR_VGCS"
The selection "direction" can also be changed via VTY.
Change-Id: I6b96d0a1df68efa5858b98297ebe0944b1473aaf
Related: OS#4852
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"struct lchan_activate_info" is expanded to support flags for VGCS and
VBS. These are used to send the correct Channel Mode to the BTS.
"enum lchan_activate_for" is expanded to indicate and activation of
VGCS/VBS calls.
Change-Id: Ic0c0597d149d0758d6766937d99660fa02e0e139
Related: OS#4852
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This message will be sent to each BTS with a VGCS/VBS channel to notify
the served MSs about ongoing group/broadcast calls. It is also used to
remove the notification, if the call is terminated.
Change-Id: I96ec0ee5d1a772a45f1ebfd64210718c8bf5aa58
Related: OS#4852
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Change-Id: I73079948afbdde35594660959b5335118a810d7b
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Change-Id: I18e4ca3599e480de2d0f64cc1b6f4bb6ce8020d4
Related: OS#4852
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This adds the vty commands and respective logic to allow the user to
specify the NCH (notification channel) position in the SI1 rests octets.
Change-Id: Iefde0af44a663f22462a54d68a58caa560eceb2f
Related: OS#5781
Requires: libosmocore.git I24a0095ac6eee0197f9d9ef9895c7795df6cdc49
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The PCUIF interface implementation in osmo-bsc provides two ways to
access the paging channel (PCH).
1) Under the SAPI PCU_IF_SAPI_PCH PAGING COMMAND messages are accepted
as whole MAC block but the format is in the style that we are going
to deprecate with PCUIF v.11. Also at the moment those PAGING COMMANDs
are not confirmed towards the PCU. This is also not necessary since
osmo-pcu would silently drop such confirmations. (see pcu_rx_data_cnf
in pcu_l1_if.cpp)
2) Under the SAPI PCU_IF_SAPI_PCH_DT messages are also accepded as
MAC blocks but the SAPI will only accept IMMEDIATE ASSIGNMENT messages.
The messages are encapsulated in a struct that holds IMSI (paging group)
and TLLI (used for confirmation) as separate struct members. The
messages are also confirmed towards the PCU as it should be.
Since we want to depreacete the older V.10 version of PCUIF and there is
not much benefit in maintaining two interfaces we should use
SAPI PCU_IF_SAPI_PCH_DT for both message types. This also requires small
adjustments to osmo-pcu (see Depends).
Depends: osmo-pcu.git I99cfe373fa157cfb32b74c113ad9935347653a71
Related: OS#5927
Change-Id: I82443f2b402aa2416469c8c50b1c050323ef3b8f
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Change-Id: I849a18a3bfd15aad00de3e103339540a7548e097
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Change-Id: I6d18ec0ad2bd6f71e0187ed70b03c3a2d0447f21
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This function is used to check if the BTS is using the IPA Abis-IP
transport, and not whether its manufacturer/vendor is ip.access.
Let's use a less confusing name.
Change-Id: I202c58341c1536489064d2671c0842c6f70b5429
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Use the proper type that can handle the entire range of MSC numbers we
allow on the VTY, we have:
#define MSC_NR_RANGE "<0-1000>"
Before this patch, MSC pool round robin would glitch around for any
'msc' numbers 'msc 256' thru 'msc 1000'.
Change-Id: I98bee022c1a78508554d2ff4a10fbce3c53f1128
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If power saving is enabled for a BTS, it should remain enabled even
if the BTS is restarted for whatever reason. This persistence can be
achieved by re-sending the configured power reduction value whenever
the BTS NM FSM enters the ENABLED state again (i.e. reconnects).
Separate gsm_bts_send_c0_power_red() from gsm_bts_set_c0_power_red()
and call the former from st_op_enabled_on_enter(). All we need to do
is to send the value that was configured before, per-timeslot power
reduction limits remain and need not to be updated.
Take a chance to move logging from BTS specific to the generic code.
Change-Id: Ic3f8a2ab0ffd049a8ed84361a3a588c1e1b23ac6
Related: SYS#6435
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Change-Id: I13d9e6ea2a2b7b11f92532d377e71f0e83974622
Related: SYS#6435
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Change-Id: I5c38f47cdf21d4e787341bf68e1e63c713003bbd
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Related: SYS#6319
Related: Ia1aea4e33230d6a685b72ea5ba20dd9c7d265d44 osmo-ttcn3-hacks
Related: Ib4a5330df30a73e744c316898817b2fa3271d75e osmo-ttcn3-hacks
Change-Id: I3a0869598b8395601a16d78dbc46eec400c0ea84
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The signal is already there but not being used.
Let's further split generic paging code from RSL specificites.
Change-Id: Iabc1c29908a5136501d6dc6e60f8777dab511b86
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The co-located PCU support for Ericsson RBS E1 CCU made it necessary to
add new features to the PCU socket interface, so let's increase the
version number.
Change-Id: I8315bd67c7f3eb0d7ee71b64cd4dff889a84fcf1
Depends: osmo-pcu.git I2a78651593323e8b9627c39918d949a33497b70f
Related: OS#5198
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The current PCU implementation has never been tested with multiple BTS
attached to it. This is due to the fact that it has been used
exclusively in an BTS co-located setup where naturally only one BTS is
present. The PCU sock protocol supports multiple BTSs in theory and we
should handle this correctly.
Related: OS#5198
Change-Id: I0b42c2c130106f6ffca2dd08d079e1a7bda41f0b
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The flag PCU_IF_FLAG_DT is no longer needed. The PCU implementation will
distinguish by the version number instead.
Change-Id: I0dc20e351deb14906b2edffc39499bad9659cc35
Related: OS#5198
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At the momemnt we use is_ericsson_bts() to check if the BTS uses a BSC
co-located PCU, this is a bit ambiguous, lets have a function that
explicitly checks for a BSC co-located PCU and nothing else.
Change-Id: I23ed4219e5ebd188867c17f387ca877efa9bc3b0
Related: OS#5198
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The check functions that we use to distinguish between the various types
of BTSs return an integer that can be 0 or 1. Let's change the return
type to bool
Change-Id: I3de957f228452c9d3aa4fed342f73bfb17363b40
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In osmo-bsc, there's currently 0..1 Lb links and 0..N A links, where N
is the number of MSC, but links can be shared in the underlaying stack
(struct osmo_sccp_instance), hence range 0..N of different
osmo_sccp_instance (identified by PC).
Even more, the Lb and A link can share the same underlaying stack, so
osmo-bsc can end up with only 1 struct osmo_sccp_instance shared by all
the above mentioned links in case all are configured under the same PC.
Total range A+Lb is 0..(1+N).
A struct gsm_subscriber_conn stores 2 struct sccp_instance*, one for
Lb (conn->lcs.lb.*)and one for A (conn->sccp.*).
They can actually point to the same sccp_instance or to different ones,
as explained above, depending on the configured setup. In any case, a
gsm_subscriber_conn needs 2 rb_nodes since it can hold
any of the 2 conn_ids independently (A or Lb).
The previous patch forgot to add that 2nd rb_node as well as some
initialization and release code for the Lb conn. This patch addresses
that.
When the 2nd rb_node, a problem when iterating the rbtree appears: how to
find out the "conn" pointer from the rb_node pointer, since the rb_node pointer
can be any of the 2 rb_nodes inside the struct at a different offsets.
In order to solve that problem, a new struct bscp_sccp_conn_node is
added, which holds all the relevant information used by the rbtree lookup code
in a generic way (rb_node and conn_id), plus a backpointer to the struct
bsc_gsm_subcriber it relates too.
Fixes: 85062ccad31e9fb73e0256a5ee556c6ae0a16449
Change-Id: If42d93adee71d646766929a09bc01ae92b734ef3
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It was found that on a busy osmo-bsc process (>1000 concurrent calls
spead over different BTSs), a good amount of time is spent iterating the
subscribers list trying to find a subscriber based on a TMSI (1.60% of
total CPU time used by osmo-bsc).
This patch introduces a new rbtree under struct bsc_subscr_store which
allows storing all the busbs ordered by TMSI.
This way, lookup time changes O(N) -> O(log(N)), at the expense of
increased insert/deletion time O(1) -> O(log(N)).
Related: SYS#6200
Change-Id: If27429e715ef4b327177e427249e68321a6e83cc
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This allows keeping the bsc_subscriber storage internals outside of main
gsm_network code, while easily allowing making the internal
implementation more complex (in order to optimize it in a follow-up
commit).
It is also nice since we get rid of uncommon procedures being used in
this code, like allocating an llist directly as a talloc context, etc.
Change-Id: I616e8872af4ac63a6985f8900909e324ba889192
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Change-Id: I846af993905aee0be75aa3021460b130362c6d3d
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Change-Id: I15a51fa8a5c30fd92b34ebb366d0a805f8902cd0
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The function was currently in osmo_bsc_sigtran.c but was never used
there, and it really doesn't have any relation to that file.
Let's move it to the only place where it's used so far, and mark it as
static.
Change-Id: I8a8cef45aa378421e0ac328d3b29b9d194698a55
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It was found that, on a busy osmo-bsc (>1000 concurrent calls spread over
several BTS), the CPU consumption looking up for gsm_subscriber_conn
based on SCCP conn_id can take a considerable amount of time (>5% of
osmo-bsc already taking 70% of the CPU time on the core it is running on).
The huge CPU consumption happens because a linear search is done (llist)
over the entire list of SCCP connections every time an SCCP message is
handled.
In order to optimize this lookup, this patch introduces a new struct
bsc_sccp_inst which becomes associated to the libosmo-sccp
osmo_sccp_instance. Each of this strucs maintains an rbtree of
gsm_subscriber_conn ordered by conn_id.
As a result algorithmic complexity adds O(log(N)) during insert, lookup
and delete of SCCP conns, but gets rid of O(N) previous lookup.
As a plus, finding a new conn_id now takes generally O(log(N)), while
before it used to take O(N).
Related: SYS#6200
Change-Id: I667d3ec1dad0ab7bc0fa4799d9611f3a914d07e5
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The 0x00FFFFFF source local reference is reserved in M3UA/SCCP, hence
avoid allocating a conn_id with that value since later on when reused as
a source local reference it would fail to be encoded.
Change-Id: I5c62bbfa89140d754edccb4404503cb70d5fde89
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Currently, the conn_id is allocated in a range 0..0xffffff by
bsc_sccp_inst_next_conn_id(), and -1 means it is unset.
This means allocation expects "int" to be at least 32 bits integer,
in order to fit 24 bits for 0..0xffffff plus the -1.
Hence, let's define the variable as uint32_t, as already done in
libosmo-sccp. Use last value 0xFFFFFFFF ((uint32_t)-1) and avoid playing
with the value being unsigned sometimes and signed only for "unset"
value.
The value is actually already handled as unsigned (printed with %u) in
most places.
Change-Id: If019bcbc1e28929fe8d981fef9103835fc6ead2e
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Change-Id: I44b1397e7771c803efdca6bf59750ca5568df365
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Change-Id: Id59eb176551b2546ee6ff9c7f0eee4d8dd6ed199
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Related: OS#4393
Change-Id: I4964b268124d29354e252c2ee509866ae75fab6d
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When the IMMEDIATE ASSIGNMENT is sent from the PCU to the BSC using the
"direct TLLI" method, the TLLI (and the last three digits of the IMSI)
is prepended to the MAC block. Currently we are taking the fields apart
manually using offsets. The code for this is difficult to read and the
method is error prone. Let's define a struct that we can just overlay
to access the fields directly. Let's also transfer the full IMSI.
Change-Id: Id6acbd243adf26169e5e8319dd66bb68dd6a3c22
Related: OS#5198
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