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srsRAN_4G
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Restoring PDCP state only when using RLC AM.

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master
Pedro Alvarez 5 years ago
parent 66d4f320e5
commit fb088a8c54
2 changed files with 33 additions and 15 deletions
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2
srsenb/hdr/stack/rrc/rrc_ue.h
Unescape Escape View File

@ -125,7 +125,7 @@ private:
uint8_t transaction_id = 0;
rrc_state_t state = RRC_STATE_IDLE;
uint16_t old_reest_rnti = SRSLTE_INVALID_RNTI;
srslte::pdcp_lte_state_t old_reest_pdcp_state = {};
std::map<uint16_t, srslte::pdcp_lte_state_t> old_reest_pdcp_state = {};
asn1::s1ap::ue_aggregate_maximum_bitrate_s bitrates;
bool eutra_capabilities_unpacked = false;

30
srsenb/src/stack/rrc/rrc_ue.cc
Unescape Escape View File

@ -365,14 +365,19 @@ void rrc::ue::handle_rrc_con_reest_req(rrc_conn_reest_request_s* msg)
parent->gtpu->mod_bearer_rnti(old_rnti, rnti);
// Get PDCP entity state (required when using RLC AM)
parent->pdcp->get_state(old_rnti, 3, &old_reest_pdcp_state);
for (const auto& erab_pair : parent->users[old_rnti]->bearer_list.get_erabs()) {
uint16_t lcid = erab_pair.second.id - 2;
old_reest_pdcp_state[lcid] = {};
parent->pdcp->get_state(old_rnti, lcid, &old_reest_pdcp_state[lcid]);
parent->rrc_log->debug("Getting PDCP state for E-RAB with LCID %d\n", lcid);
parent->rrc_log->debug(
"Got PDCP state: TX COUNT %d, RX_HFN %d, NEXT_PDCP_RX_SN %d, LAST_SUBMITTED_PDCP_RX_SN %d\n",
old_reest_pdcp_state.tx_count,
old_reest_pdcp_state.rx_hfn,
old_reest_pdcp_state.next_pdcp_rx_sn,
old_reest_pdcp_state.last_submitted_pdcp_rx_sn);
old_reest_pdcp_state[lcid].tx_count,
old_reest_pdcp_state[lcid].rx_hfn,
old_reest_pdcp_state[lcid].next_pdcp_rx_sn,
old_reest_pdcp_state[lcid].last_submitted_pdcp_rx_sn);
}
old_reest_rnti = old_rnti;
state = RRC_STATE_WAIT_FOR_CON_REEST_COMPLETE;
@ -558,7 +563,20 @@ void rrc::ue::send_connection_reconf(srslte::unique_byte_buffer_t pdu)
// If reconf due to reestablishment, recover PDCP state
if (state == RRC_STATE_REESTABLISHMENT_COMPLETE) {
parent->pdcp->set_state(rnti, 3, old_reest_pdcp_state);
for (const auto& erab_pair : bearer_list.get_erabs()) {
uint16_t lcid = erab_pair.second.id - 2;
bool is_am = parent->cfg.qci_cfg[erab_pair.second.qos_params.qci].rlc_cfg.type().value ==
asn1::rrc::rlc_cfg_c::types_opts::am;
if (is_am) {
parent->rrc_log->debug(
"Set PDCP state: TX COUNT %d, RX_HFN %d, NEXT_PDCP_RX_SN %d, LAST_SUBMITTED_PDCP_RX_SN %d\n",
old_reest_pdcp_state[lcid].tx_count,
old_reest_pdcp_state[lcid].rx_hfn,
old_reest_pdcp_state[lcid].next_pdcp_rx_sn,
old_reest_pdcp_state[lcid].last_submitted_pdcp_rx_sn);
parent->pdcp->set_state(rnti, lcid, old_reest_pdcp_state[lcid]);
}
}
}
// Reuse same PDU

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