PentHertz
/
srsLTE
mirror of https://github.com/PentHertz/srsLTE.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Starting to implement the receive function of PDCP NR.

This commit is contained in:
Pedro Alvarez 2019-07-03 18:51:44 +01:00 committed by Andre Puschmann
parent d7a2721bb0
commit 8e1b9b9f5b
2 changed files with 23 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
lib/include/srslte/upper/pdcp_entity_nr.h
View File

@ -77,19 +77,14 @@ private:
uint16_t sn_len_bytes = 0;
// State variables: 3GPP TS 38.323 v15.2.0, section 7.1
uint32_t tx_next = 0;
uint32_t rx_next = 0;
uint32_t rx_deliv = 0;
uint32_t rx_reord = 0;
uint32_t tx_next = 0; // COUNT value of next SDU to be transmitted.
uint32_t rx_next = 0; // COUNT value of next SDU expected to be received.
uint32_t rx_deliv = 0; // COUNT value of first SDU not delivered to upper layers, but still waited for.
uint32_t rx_reord = 0; // COUNT value following the COUNT value of PDCP Data PDU which triggered t-Reordering.
// Constants: 3GPP TS 38.323 v15.2.0, section 7.2
uint32_t window_size = 0;
};
/****************************************************************************
* Pack/Unpack helper functions
* Ref: 3GPP TS 38.323 v15.2.0
***************************************************************************/
} // namespace srslte
#endif // SRSLTE_PDCP_ENTITY_NR_H

21
lib/src/upper/pdcp_entity_nr.cc
View File

@ -115,11 +115,26 @@ void pdcp_entity_nr::write_pdu(unique_byte_buffer_t pdu)
cipher_decript(pdu);
// Check valid rcvd_count
if (rcvd_count < rx_deliv /*|| received_before (TODO)*/) {
if (rcvd_count < rx_deliv /*|| check_received_before() TODO*/) {
return; // Invalid count, drop.
}
//
if(rcvd_count >= rx_next)
// Store PDU in reception buffer
// TODO
// Update RX_NEXT
if(rcvd_count >= rx_next){
rx_next = rcvd_count + 1;
}
// Deliver to upper layers (TODO support in order delivery)
if (is_control()) {
rrc->write_pdu(pdu);
} else {
gw->write_pdu(pdu);
}
// Not clear how to update RX_DELIV without reception buffer (TODO)
// TODO handle reordering timers
}