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53 Commits (3dd7877199d0efde7a6110f8370034cf05b8355d)

Author SHA1 Message Date
Francisco b8bd869d0f move ue rlc interfaces to separate interfaces header file 4 years ago
Francisco ea04104e8e move ue gw interfaces to separate interfaces header file 4 years ago
Pedro Alvarez d8f3878ce1
RLC failure to deliver notifications and discard timer limits to 1500ms (#2368) 
* Added interfaces for the RLC to notify the PDCP of failure to transmit
SDU

* Limit discard timer to 1500ms, to avoid issues of lingering SDUs in the undeliverd_sdus_queue.

* Fix bug in early exit of notify_delivery and notify_failure

* fix compilation issue in rlc-pdcp notification

Co-authored-by: Francisco <francisco.paisana@softwareradiosystems.com>
 4 years ago
Pedro Alvarez d34aba8065 Added interfaces to get metrics from PDCP entities. 4 years ago
Pedro Alvarez b0fe302f8e Added interfaces so the upper layers can trigger the PDCP status report. Added ability to the UE to send Status Report aftre reestablishment. 4 years ago
Pedro Alvarez dd6d6f731d Passing SN provided by upper layers to PDCP entity. Using it to calculate TX_COUNT if passed. 4 years ago
faluco f424f2e113 - Upgraded PDCP classes in lib to use srslog. 
- Update tests to new changes.
 4 years ago
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 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
Andre Puschmann 07d2bc4fe8 change license header to agnostic version with hint to root LICENSE file 4 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
Francisco Paisana f0874b780b add radio_base/null classes 5 years ago
Francisco Paisana 30ae2226c1 common interface for stack multiqueue tasks, background tasks and timers 5 years ago
Francisco Paisana 8aa44928e9 fix 5g compilation errors 5 years ago
Xavier Arteaga e832769ae6 Updated copyright 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 b841859220 Moved pdcp test functionality to a common header. Fixed linking issue in 5GNR PDCP 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 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
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 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
Pedro Alvarez 517ce8a220 Added test to test out of order COUNT wraparoung. Added setters to help with the testers. 5 years ago
Pedro Alvarez b7fdcaabc5 Starting to add reordering timers at PDCP NR entity. Timeout seems to be triggered correctly and pass the SDUs to the upper layers when it expires. First tests passing. 5 years ago
Pedro Alvarez 45d298507b Starting to move pdcp configs to rrc_interface_types. Starting to add test for reorder timeout. 5 years ago
Pedro Alvarez 6cf2bd7bc3 Starting to add reordering queue in the PDCP. 5 years ago
Pedro Alvarez ff15ed5018 Starting to add timers to the NR PDCP. 5 years ago
Pedro Alvarez 6efa944b5e Removed srslte prefix from pdcp_config_t 5 years ago
Pedro Alvarez 61051b4cb3 Changed PDCP NR read_data_header to return SN. 5 years ago
Pedro Alvarez 491695ab77 Clang-formated PDCP NR PR. 5 years ago
Pedro Alvarez af2b593b8c Added check for integrity in test. First Rx PDCP NR test passing. 5 years ago
Pedro Alvarez ea3c44e9ac Removing header before decrypting. Continuing to add decryption tests to PDCP NR 5 years ago
Pedro Alvarez a42726f836 Fixed hdr_len_bytes in PDCP NR. Tx seems OK now. 5 years ago
Pedro Alvarez 73e30743d1 Added enum to PDCP config to replace two bools. 5 years ago
Pedro Alvarez 457f35699d Reverted back to a single config structure between PDCP NR and PDCP LTE. 5 years ago
Pedro Alvarez 810cacdc02 Adding write_data_header and append_mac helper functions to PDCP NR entity. 5 years ago
Pedro Alvarez c9e99443d8 Adding PDCP NR Tx test. 5 years ago
Pedro Alvarez 8e8a7a4154 Add more logic to PDCP NR tx logic. 5 years ago
Pedro Alvarez 2081b22465 Added PDCP_SN_LEN constants. Added bearer_id and direction back to the pdcp_entity_base. 5 years ago
Pedro Alvarez 8e1b9b9f5b Starting to implement the receive function of PDCP NR. 5 years ago