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315 Commits (3dd7877199d0efde7a6110f8370034cf05b8355d)

Author SHA1 Message Date
Pedro Alvarez de90b4753f Added the ability of the RLC AM to notify the PDCP of the acknowledged 
PDCP PDUs. This includes:

- Modifying the byte_buffer_t to include PDCP SN meta-data. This way,
  the RLC can keep track of the ack'ed bytes for a specific PDCP PDU.
- Added in the RLC an `undelivered_sdu_info queue`, to keep track of the
  amount of ack'ed bytes and the total size of the PDCP PDU,
  so the RLC can know when delivery is finished.
- Added an interface between the PDCP and the RLC so that the RLC can
  notify the PDCP when it receives an ack from the status PDUs. The RLC
  passes to the PDCP a vector of all the ack'ed pdus in a rx'ed status PDU.
- Added some tests to the notify functionality. This includes some tests
  where the PDUs are acked imediatly, and one test where the PDU is
  retx'ed.
 4 years ago
Francisco e8f6a436af update gtpu test to account for scenario of buffered PDCP SNs, and buffering of direct path until indirect tunnel is closed 4 years ago
Francisco 56ec2c286e add gtpu test for tunneling 4 years ago
Francisco 13649e4e19 Implement new GTPU functionality: 
- multiple tunnels per E-RAB
- data forwarding between connected GTPU tunnels
- forwarding GTPU End Marker between connected tunnels
- TeNB GTPU handles in-sequence delivery when multiple tunnels for the same ERAB exist.
 4 years ago
Pedro Alvarez 350e90a030 Make RLC retransmissions deterministic. It was creating unpredictablity 
in the RLC AM tests. See issue #2228
 4 years ago
Ismael Gomez a6423442c2
Refactor NR RA files and fix header includes all over library (#2162) 
* Refactor NR resource allocation classes. Use DCI instead of grant for dummy PDSCH UE/eNB test

* Minor refactors in NR workers and ue_dl

* Fix include issues

* fix compilation issues
 4 years ago
Andre Puschmann bc4c9606ce rlc_am: add extended bearer metrics 
this patch adds support for measuring the:
* SDU rx latency (Average time in ms from first RLC segment to full SDU)
* amount of buffered bytes (sum of payload of PDUs buffered in rx_window)

the implementation is using std::chrono
 4 years ago
Andre Puschmann d54c33258b rlc_metrics: add sdu rx latency and buffered bytes 4 years ago
Andre Puschmann e43eab8b5f rlc: fix rate metrics (nan,inf values), use std::chrono 
similar to GW, we remove gettimeofday and use std::chrono.
we also make sure to reset the metrics after reestablishment
 4 years ago
Francisco Paisana 53116a99fc add rlc metrics to rlc_um 4 years ago
Francisco Paisana 82eb31f70f add rlc metrics to enb 4 years ago
Francisco Paisana 7ffc236a1a enable log line when rlc tx pdu last segment is sent but the latency log is disabled 4 years ago
Francisco 951912d18a disable RLC latency measure when ENABLE_TIMESTAMP flag is disabled 4 years ago
Francisco 92bc98e2f0 add byte tx counter to the set of metrics being measured in RLC 4 years ago
Francisco e2654e69ec Enable pdu stack latency measurements in the eNB. 4 years ago
Andre Puschmann c0883291f6 rlc: pass TTI to get_metrics to calculate "real" LTE rx/tx rate 
when retrieving the RLC metrics, the number of TTIs since the last
call are passed. This allows to calculate the actual rate
based on the LTE timing rather than only the system timing.
 4 years ago
Andre Puschmann cff9f03a11 rlc_am_lte: remove unused rx/tx metrics members 
those variables aren't used and are included in the bearer metrics already
 4 years ago
Pedro Alvarez 49bcffcdf8 Fix issue packing TEID in Error indication. 4 years ago
Andre Puschmann 07d2bc4fe8 change license header to agnostic version with hint to root LICENSE file 4 years ago
Andre Puschmann 6d3af2d2bd rlc_um: fix bearer name in logging after re-configuration 
the RLC bearer name was empty after reestablishing a UM bearer.

we need to pass the RLF config and RB name to the internal configure()
call of the Rx entity, like we already do for the Tx side
 4 years ago
Andre Puschmann 795db30338 pdcp: drop PDCP control PDUs 
this patch adds a check to drop all PDCP control PDUs
in order to prevent handling them as data PDUs.

This could happen when the size exceeded the arbitrary length check.

This should fix #1787
 4 years ago
Francisco Paisana dcf5a727f2 do not send RRC release in case the eNB receives a S1AP UEContextRelease command and the UE is doing handover. Handle GTPU end marker 4 years ago
Andre Puschmann 569d8ee860 rlc: remove unused macro 
this seems to be a legacy copy of the RLC_TX_QUEUE_LEN macro
in rlc_interfaces_types.h
 4 years ago
Andre Puschmann 55336665b9 rlc: remove timers and sdu queue length from RLC TM ctor 
timers aren't used in RLC TM, also the default queue length is
fine to be used at all times.
 4 years ago
Andre Puschmann 9550bd3ef8 rlc: revisit interface for MAC and RRC 
* add locked and unlocked version of has_data() since one is
  called from stack and one from PHY threads

* add comments in each interface section as to why locking
  is required or not

* remove RLC rwlock when not required

* move calls only used by RRC to RRC section
 5 years ago
Andre Puschmann c8b4ba885b rename rlc_tx_queue to byte_buffer_queue 
this data structure will be used by the PDCP layer as well.
 5 years ago
Andre Puschmann a7911f0dab pdcp,rlc: refactor SDU queueing policy 
this patch refactors the SDU queuing and dropping policy of the RLC and PDCP layer.
the previous design had issues when packets have been generated at a higher
rate above the PDCP than they could be consumed below the RLC.

When the RLC SDU queues were full, we allowed two policies, one to block on the write
and the other to drop the SDU. Both options are not ideal because they either
lead to a blocking stack thread or to lost PDCP PDUs.

To avoid this, this patch makes the following changes:

* PDCP monitors RLC's SDU queue and drops packets on its north-bound SAP if queues are full
  * a new method sdu_queue_is_full() has been added to the RLC interface for PDCP
* remove blocking write from pdcp and rlc write_sdu() interface
  * all writes into queues need to be non-blocking
  * if Tx queues are overflowing, SDUs are dropped above PDCP, not RLC
* log warning if RLC still needs to drop SDUs
  * this case should be avoided with the monitoring mechanism
 5 years ago
Francisco Paisana 1a9c04bf2f use of task scheduler handle in pdcp 5 years ago
Andre Puschmann ff96336f91 rlc_um: fix reestablishment for sending UM entity 
we've reset the rx state variables during reestablishment but not
the tx state variable.
 5 years ago
Andre Puschmann df50dd7d3c rlc: extend RLC metrics 
extend RLC metrics to count Rx/Tx PDUs/SDUs bytes/#
 5 years ago
Andre Puschmann 82f811ed52 rlc_am: change return value when writing SDU 
return false when SDU couldn't be added to SDU tx queue so
to count dropped SDUs in base
 5 years ago
Andre Puschmann fc3cd24177 rlc_um: fix counting of lost PDUs 
* change try_push() return value to indicate whether the addition
  of the SDU to the tx queue was successful or not
* count lost PDUs
 5 years ago
Francisco Paisana 0259d31b13 fix lack of final in pdcp virtual methods 5 years ago
Francisco Paisana 2f8dad03cc add rlc nr locking 5 years ago
Francisco Paisana f0874b780b add radio_base/null classes 5 years ago
Pedro Alvarez 9c1a7d2cf1 Removed get_bearer_status in PDCP. Renamed get_state/set_state to 
get_bearer_state/set_bearer_state.
 5 years ago
Pedro Alvarez 08578a7331 Switched to use a struct to hold the PDCP entity state variables. Deleted some unecessary setters. 5 years ago
Pedro Alvarez 66d4f320e5 Added intereface to set PDCP state after reestablishment. 5 years ago
Pedro Alvarez 33567d81db Added interface to get internal PDCP state. 5 years ago
Pedro Alvarez 4093e75237 Starting to add getters and setters of the state in PDCP lte entity. 5 years ago
Francisco Paisana b4b5cd7cd6 added nr gnb and ue interfaces 5 years ago
Ismael Gomez a1f0f8de35
Add callback to RLC to indicate BSR for TX and reTX queues (used in ENB) (#1361) 5 years ago
Andre Puschmann 1eaa99530f rlc_am: tiny refactor of rlc_amd_pdu_header_t 
mainly turning header into proper class and adding default init value
 5 years ago
Francisco Paisana 791d84e639 created error_type and cleaned up expected 5 years ago
Francisco Paisana 975d004224 fix compilation error 5 years ago
Francisco Paisana a2b76a4a5f use references rather than pointers 5 years ago
Andre Puschmann 99c3975f83 remove CMake option to disable glibc header for IPv6 
we've added this to allow building for older glibc
version that cause issues with redefining some structs.

this patch removes the flag and auto-detects it using the glibc version
 5 years ago
Francisco Paisana 3da8464a21 fix compilation issue with lack of override keyword and scoping in fsm 5 years ago
Xavier Arteaga 01e224348c Fix compilation for NR HL 5 years ago
Xavier Arteaga 77d5dedddc Fix LGTM warnings and recommendations 5 years ago
Pedro Alvarez ad0abe740b Added support to PDCP SN len of 7. Also added a check for valid configs in pdcp entity. 5 years ago
Francisco Paisana c09f76ed6c unified stack task defer method 5 years ago
Francisco Paisana a2ade9edd1 break down rrc_interface_types.h into multiple files. moved pdcp_config.h to same folder 5 years ago
Andre Puschmann 9307a54512 pdcp: adding enable_security_timed() method 
this is an extension to the currently available security
configuration and activation methods provided by PDCP.
The new call allows to specify a Rx and Tx SN after which the
entire security config, i.e. integrity and ciphering, should
be enabled.

this is mainly required for the PDCP entity of the conformance
testing SS but could potentially also be used by the eNB
to enable security for PDCP after sending the SecModeCommand
for example.

the extra call was added to not break the existing API.
 5 years ago
Pedro Alvarez f4d648b26e Removed rx_count state variable from PDCP LTE entity. Updated get_bearer_status(...) acordingly. Added get_last_submitted_rx_count() getter. 5 years ago
Francisco Paisana 30ae2226c1 common interface for stack multiqueue tasks, background tasks and timers 5 years ago
Francisco Paisana 575475962f the rlc um rx does not need a mutex bc it is always called in the stack thread 5 years ago
Francisco Paisana 8aa44928e9 fix 5g compilation errors 5 years ago
Francisco Paisana 344eaf49ec use logmap in the whole enb and ue 5 years ago
Francisco Paisana 9bde6d442c removed the uneeded locks from the pdcp 5 years ago
Francisco Paisana f3890b2908 use of mutexed cache to store the valid lcids that can be checked from gw thread 5 years ago
Francisco Paisana 46a1be3e76 updated mac-rlc interface to use unique_byte_buffer 5 years ago
Francisco Paisana 597334c4bf limit the rlc queue size for suspended bearers 5 years ago
Xavier Arteaga e832769ae6 Updated copyright 5 years ago
Pedro Alvarez 96c82b3fc6 Moved PDCP configs to pdcp_config.h. Added `as_security_cfg_t` structure to hold access stratum keys. 
Refactored PDCP, RRC and USIM accordingly.
 5 years ago
Andre Puschmann 9e113f8b27 pdcp: allow to configure security for rx/tx seperately 
previously PDCP security (integrity and ciphering) could only
be enabled for both Rx and Tx at the same time.

this, however, caused an issue during the conformance testing in which,
in TC_8_2_1_1() for example, the eNB sends a SecModeCommand and a
RRC Reconfiguration in the same MAC TB. In this case, the eNB
needs to be able to enable DL security right after sending the SecModeCmd
in order to send the RRCReconfig encrypted. However, enabling UL security needs
to be postponed until after the SecModeComplete is received.

This patch allows to enable PDCP security for rx/tx independently if
that is needed. The default way is like before, enabling it for tx/rx at
the same time.
 5 years ago
Pedro Alvarez aecfb151ce Apply clang-format to the lib in preperation for PR. 5 years ago
Pedro Alvarez d98b888ca4 Separating PDCP read_header function from discard_header_function. Starting to add DRB unit test. 5 years ago
Pedro Alvarez 284a0f7b4e Starting to add PDCP LTE unit tests. Test failing for now. 5 years ago
Pedro Alvarez b841859220 Moved pdcp test functionality to a common header. Fixed linking issue in 5GNR PDCP 5 years ago
Pedro Alvarez 5f39c79bda Moved some more packing functions to base class. 5 years ago
Pedro Alvarez fdd67c3865 Fix issue in integrity check in PDCP SRBs. Moved some helper functions to the pdcp base class 5 years ago
Pedro Alvarez 965b0ee99b Starting to fix handling of RX SRB PDUs in PDCP. 5 years ago
Xavier Arteaga 5b14a7d585 Implementation Tx RLC suspend 5 years ago
Ismael Gomez 52716f8716 Process HO complete in the background to avoid heap-after-use bug when PHY measurements are reported during a HO 
rrc_meas refactor. Need to split commit

Fix typo

Temporal commit

Apply rx_gain_offset to neighbour cell measurements

srsLTE: modify TESTASSERT Macro to follow codeline

SRSUE: prevent RRC from having serving cell in neighbour list

SRSUE: DL HARQ does not need Time Aligment Timer. UL is disabled using PUCCH resources release

SRSUE: extend intra-frequency to CA SCell

SRSUE: fix confusing/ambiguous code in the RRC measurements and fix concurrency issue

SRSUE: remove RRC measurement report triggers when measurements are modified or HO succesful

SRSUE: fix compilation issues and Reest SIB indexes

Fixes sync using incorrect cell configuration when search cell does not find a correct cell

Small refactor to remove measurement report triggers always after removing measurement

SRSUE: Removed SIC PSS from UE

SRSUE: fix inter-frequency reestablishment and added more traces

SRSUE: Fix compilation issue
 5 years ago
Andre Puschmann 6ec573987a remove default value for 'blocking' param from pdcp::write_sdu() 
there were two defaults and one was shadowing the other. This
commit removes both defaults and uses blocking-mode for RRC
calls to PDCP in the UE. The eNB write_sdu() uses the non-blocking
mode by default. We have to review the eNB's RRC perhaps and use blocking
there too and non-blocking only for data plane
 5 years ago
Pedro Alvarez c5979f59eb Clang format UE, eNB and lib (#850) 
* Clang-formated UE, eNB and lib.
* Fixed compiling errors from clang-format.
* Fix linking issues introduced by clang-format
* Fix poor formating in initializing arrays of arrays.
* Fix mistake in conflict resolution on rm_turbo.c
* Re-apply clang format to gtpc_ies.h
 5 years ago
Francisco Paisana 6b4488d5c1 added sending of enb status transfer from SeNB 5 years ago
Pedro Alvarez e1cdd51eba Clang-formated before pull request 5 years ago
Pedro Alvarez 61958af70b Timer removes itself from the map upon expiration 5 years ago
Pedro Alvarez 60feab3d7b Added map to keep discardTimers in PDCP NR entity. 5 years ago
Pedro Alvarez e68956bcf6 Adding discard timer timeout to PDCP config. 5 years ago
Pedro Alvarez 2e7ddef038 Continue to add discard_sdu to RLC interfaces. 5 years ago
Pedro Alvarez a77dd4e959 Starting to add boiler-plate code to support Discard at RLC. 5 years ago
Pedro Alvarez 7ccc7d1d20 Starting to notify RLC upon PDCP discard (NR) 5 years ago
Pedro Alvarez f3eeaf401a Removed unecessary lambda redirection in pdcp_entity_nr 5 years ago
Andre Puschmann 9493e7492c add initial RLC AM NR status PDU packing code including tests 5 years ago
Andre Puschmann db2c43553e add basic rlc_am_base class containing data/control PDU check 5 years ago
Andre Puschmann b32a4cf294 add RLC AM NR PDU packing and unpacking 5 years ago
Pedro Alvarez d4fb4d8c86 Fixup clang-format in pdcp before PR. 5 years ago
Pedro Alvarez 15613465cf Moving some initialization from init function to constructor in the PDCP entities. 5 years ago
Andre Puschmann b20f7ba541 refactor RLC UM and add NR receiver 5 years ago
Andre Puschmann 03bd63d9ab rename RLC AM class to RLC AM LTE 5 years ago
Andre Puschmann 2d126371f6 adopt PDCP NR to use new timer class 5 years ago
Pedro Alvarez ea0a413c8a Added check on wether the PDCP entity is initialized. 5 years ago
Pedro Alvarez cede56abe1 Fix small typo 5 years ago
Pedro Alvarez 8511fca940 Clang-formated to prepare for PR 5 years ago
Pedro Alvarez d3a07fdd38 Added check for overflow at RX. Adding more tests. 5 years ago
Pedro Alvarez 62230c6ab9 Starting to have overflow protection in PDCP NR tx 5 years ago
Pedro Alvarez 1d56fa6308 Improved speed of tests for COUNT wraparound, by setting the PDCP initial state. 5 years ago