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38 Commits (7e7f7b4c0161292b5b46638e8d48995859adc91e)

Author SHA1 Message Date
Francisco dab6e8bdcd nr,gnb: updates in parsing and phy files to allow the splitting of NR and LTE stacks 3 years ago
Francisco 8d719db43d nr,gnb,mac: implement zero-copy get_dl_sched/get_ul_sched NR scheduler interface 3 years ago
Francisco 0b51848dda nr,gnb,rrc: use multiqueue to forward x2 tasks to NR stack 3 years ago
Andre Puschmann 255ddb1329 enb,gnb: add basic support for sgnb release procedure 
the procedure is currently started when the EUTRA UE object
is deleted (after RRC release) in order to clean-up the
ENDC resources on the gNB.
 3 years ago
faluco aa0c936f50 Fix race condition when destroying the gnb stack class. 
The gnb stack class could be destroyed concurrently while still running its task scheduler thread.
 3 years ago
Francisco 877b995a4d gnb,nr: add metrics for ack'd TBS in the gNB. 3 years ago
faluco 9058ee9a5b Move gNB metrics processing to the stack thread avoiding concurrency issues in MAC and RRC. 3 years ago
Andre Puschmann 06fbb58d70 gnb,mac: add dedicated arguments struct for MAC-NR 
as the PCAP object is now only visible inside MAC-NR we can't
share the PCAP file between EUTRA/NR (like we do in the UE).

This patch removes the hard-coded filename for the NR PCAP file.
 3 years ago
Francisco Paisana 23bf542ae7 stack,nr: isolate calls between LTE and NR stacks via the task multiqueue 3 years ago
Andre Puschmann b134781d36 enb: remove redundant RLC/PDPC classes for NR 
the RLC/PDCP entities for NR are included in the RLC/PDCP wrapper classes
and don't require their own
 3 years ago
Andre Puschmann 3fd47d2af4 enb: refactor L2/L3 and (re)move all NR components to gNB stack 
* decouple EUTRA and NR stack classes
* implement dummy X2 interface with control and data plane methods
* implement eNB time source interface that PHY calls
 3 years ago
Andre Puschmann 6a46931144 mac_nr,enb: move header into nr subfolder 3 years ago
Andre Puschmann c03623863b enb,nsa: fix UL PDU processing 
* remove const from pusch_info() MAC/PHY interface to allow moving unique byte buffer
 3 years ago
Andre Puschmann 45c1971249 mac,phy,interface: clean up and add NR interface to LTE stack 
* remove obsolte rx_data_ind
* add mac_phy_interface_nr to LTE stack
 3 years ago
Francisco Paisana b589c0d184 sched,nr: ack/crc info included in nr_phy_test 3 years ago
Xavier Arteaga b25681f9de gnb,prach: add PRACH to gNB 
rebase of Xavier's feature_gnb_prach branch
 4 years ago
Xavier Arteaga 5307fec2f0 Added GNB MAC UL info initial interface and fix PHY implementation 4 years ago
Xavier Arteaga 6f5614a0cc Suggested modifications on gNb MAC/PHY interface 4 years ago
Xavier Arteaga 8378c85ec4 Refactored gNb PHY 4 years ago
Xavier Arteaga d49734b1bc SRSENB: Refactor to accomodate 5G NR 4 years ago
Andre Puschmann 483a216bd5 ue,stack: refactor handling of radio bearears in UE stack 
this is a rather large commit that is hard to split because
it touches quite a few components.

It's a preparation patch for adding NR split bearers in the next
step.

We realized that managing RLC and PDCP bearers for both NR and LTE
in the same entity doesn't work. This is because we use the LCID
as a key for all accesses. With NR dual connectivity however we
can have the same LCID active at the same time for both LTE and NR
carriers.

The patch solves that by creating a dedicated NR instance for RLC/PDCP
in the stack. But then the question arises for UL traffic on, e.g. LCID 4
what PDCP instance the GW should use for pushing SDUs. It doesnt' know
that. And in fact it doesn't need to. It just needs to know EPS
bearer IDs. So the next change was to remove the knowledge of what
LCIDs are from the GW. Make is agnostic and only work on EPS bearer IDs.

The handling and mapping between EPS bearer IDs and LCIDs for LTE
or NR (mainly PDCP for pushing data) is done in the Stack because
it has access to both.

The NAS also has a EPS bearer map but only knows about default and
dedicated bearers. It doesn't know on which logical channels they
are transmitted.
 4 years ago
yagoda f90f6f0c7e adding MAC 0 padding support 4 years ago
Francisco 1488606156 refactor - create s1ap dedicated folder 4 years ago
Codebot 4523ee6087 rename srsLTE to srsRAN 4 years ago
Francisco 3e9f93eb8a refactor - remove old log_filter and logmap libraries from the codebase 4 years ago
faluco 2328011732 - Remove old loggers in ttcn3 and in NR. 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
Andre Puschmann 07d2bc4fe8 change license header to agnostic version with hint to root LICENSE file 4 years ago
Pedro Alvarez 604e79214d Changed NAS is_attached interface to is_registered. 4 years ago
Pedro Alvarez 14844a168a Created new class to hold all NAS states for the NAS state machine. Added EMM-DEREGISTERED substates and EMM-REGISTERED substates. 
Decoupled PLMN selection, attach request and service request. Removed RRC connect procedure from NAS.
 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 5e06430455 removal of stack handler interface 5 years ago
Francisco Paisana 039977aeb5 renamed interfaces 5 years ago
Francisco Paisana 1a9c04bf2f use of task scheduler handle in pdcp 5 years ago
Francisco Paisana 4f5e65781f created task scheduler class to deal with timers, thread pool, multiqueue, internal tasks 5 years ago
Ismael Gomez e378a45db0 Reorganized priorities to avoid GW starve the CPU 5 years ago
Francisco Paisana 3c2e3dbdbf added latest mac nr updates 5 years ago
Francisco Paisana b843585abc add srsgnb stack class 5 years ago