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srsLTE
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43 Commits

Author SHA1 Message Date
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
 2020-07-13 17:05:28 +02:00
Francisco Paisana 1a9c04bf2f use of task scheduler handle in pdcp 2020-07-13 11:19:25 +01:00
Francisco Paisana f0874b780b add radio_base/null classes 2020-06-18 23:37:26 +01:00
Francisco Paisana 30ae2226c1 common interface for stack multiqueue tasks, background tasks and timers 2020-03-31 13:42:06 +01:00
Francisco Paisana 8aa44928e9 fix 5g compilation errors 2020-03-25 15:50:30 +00:00
Xavier Arteaga e832769ae6 Updated copyright 2020-03-16 11:26:06 +01:00
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.
 2020-03-01 18:26:45 +01:00
Pedro Alvarez b841859220 Moved pdcp test functionality to a common header. Fixed linking issue in 5GNR PDCP 2020-02-20 20:53:27 +01:00
Pedro Alvarez 61958af70b Timer removes itself from the map upon expiration 2019-12-04 18:21:14 +01:00
Pedro Alvarez 60feab3d7b Added map to keep discardTimers in PDCP NR entity. 2019-12-04 18:21:14 +01:00
Pedro Alvarez a77dd4e959 Starting to add boiler-plate code to support Discard at RLC. 2019-12-04 18:21:14 +01:00
Pedro Alvarez 7ccc7d1d20 Starting to notify RLC upon PDCP discard (NR) 2019-12-04 18:21:14 +01:00
Pedro Alvarez f3eeaf401a Removed unecessary lambda redirection in pdcp_entity_nr 2019-12-04 18:21:14 +01:00
Pedro Alvarez d4fb4d8c86 Fixup clang-format in pdcp before PR. 2019-11-21 13:18:30 +01:00
Pedro Alvarez 15613465cf Moving some initialization from init function to constructor in the PDCP entities. 2019-11-21 13:18:30 +01:00
Andre Puschmann 2d126371f6 adopt PDCP NR to use new timer class 2019-11-07 14:12:08 +01:00
Pedro Alvarez ea0a413c8a Added check on wether the PDCP entity is initialized. 2019-11-07 14:12:08 +01:00
Pedro Alvarez cede56abe1 Fix small typo 2019-11-07 14:12:08 +01:00
Pedro Alvarez 8511fca940 Clang-formated to prepare for PR 2019-11-07 14:12:08 +01:00
Pedro Alvarez d3a07fdd38 Added check for overflow at RX. Adding more tests. 2019-11-07 14:12:08 +01:00
Pedro Alvarez 62230c6ab9 Starting to have overflow protection in PDCP NR tx 2019-11-07 14:12:08 +01:00
Pedro Alvarez 1d56fa6308 Improved speed of tests for COUNT wraparound, by setting the PDCP initial state. 2019-11-07 14:12:08 +01:00
Pedro Alvarez 517ce8a220 Added test to test out of order COUNT wraparoung. Added setters to help with the testers. 2019-11-07 14:12:08 +01:00
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. 2019-11-07 14:12:08 +01:00
Pedro Alvarez 45d298507b Starting to move pdcp configs to rrc_interface_types. Starting to add test for reorder timeout. 2019-11-07 14:12:08 +01:00
Pedro Alvarez 6cf2bd7bc3 Starting to add reordering queue in the PDCP. 2019-11-07 14:12:08 +01:00
Pedro Alvarez ff15ed5018 Starting to add timers to the NR PDCP. 2019-11-07 14:12:08 +01:00
Pedro Alvarez 6efa944b5e Removed srslte prefix from pdcp_config_t 2019-07-30 15:01:50 +02:00
Pedro Alvarez 61051b4cb3 Changed PDCP NR read_data_header to return SN. 2019-07-30 15:01:50 +02:00
Pedro Alvarez 491695ab77 Clang-formated PDCP NR PR. 2019-07-30 15:01:50 +02:00
Pedro Alvarez af2b593b8c Added check for integrity in test. First Rx PDCP NR test passing. 2019-07-30 15:01:50 +02:00
Pedro Alvarez ea3c44e9ac Removing header before decrypting. Continuing to add decryption tests to PDCP NR 2019-07-30 15:01:50 +02:00
Pedro Alvarez a42726f836 Fixed hdr_len_bytes in PDCP NR. Tx seems OK now. 2019-07-30 15:01:50 +02:00
Pedro Alvarez 73e30743d1 Added enum to PDCP config to replace two bools. 2019-07-30 15:01:50 +02:00
Pedro Alvarez 457f35699d Reverted back to a single config structure between PDCP NR and PDCP LTE. 2019-07-30 15:01:50 +02:00
Pedro Alvarez 810cacdc02 Adding write_data_header and append_mac helper functions to PDCP NR entity. 2019-07-30 15:01:50 +02:00
Pedro Alvarez c9e99443d8 Adding PDCP NR Tx test. 2019-07-30 15:01:50 +02:00
Pedro Alvarez 8e8a7a4154 Add more logic to PDCP NR tx logic. 2019-07-30 15:01:50 +02:00
Pedro Alvarez 2081b22465 Added PDCP_SN_LEN constants. Added bearer_id and direction back to the pdcp_entity_base. 2019-07-30 15:01:50 +02:00
Pedro Alvarez 8e1b9b9f5b Starting to implement the receive function of PDCP NR. 2019-07-30 15:01:50 +02:00
Pedro Alvarez 52f75c3cf2 Starting to add PDCP NR state variables. 2019-07-30 15:01:50 +02:00
Pedro Alvarez 1944bf9a80 Continue to split pdcp_entity_lte and pdcp_entity_nr. Compiling now. 2019-07-30 15:01:50 +02:00
Pedro Alvarez 005d03cb1a Starting to split pdcp_entity into pdcp_entity_lte and pdcp_entity_nr to support NR PDCP 2019-07-30 15:01:50 +02:00