mirror of https://github.com/pvnis/srsRAN_4G.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
120 lines
5.0 KiB
C++
120 lines
5.0 KiB
C++
/**
|
|
*
|
|
* \section COPYRIGHT
|
|
*
|
|
* Copyright 2013-2021 Software Radio Systems Limited
|
|
*
|
|
* By using this file, you agree to the terms and conditions set
|
|
* forth in the LICENSE file which can be found at the top level of
|
|
* the distribution.
|
|
*
|
|
*/
|
|
|
|
#include "srsran/asn1/s1ap_utils.h"
|
|
#include "srsran/interfaces/rrc_interface_types.h"
|
|
|
|
#ifndef SRSRAN_ENB_S1AP_INTERFACES_H
|
|
#define SRSRAN_ENB_S1AP_INTERFACES_H
|
|
|
|
namespace srsenb {
|
|
|
|
struct s1ap_args_t {
|
|
uint32_t enb_id; // 20-bit id (lsb bits)
|
|
uint8_t cell_id; // 8-bit cell id
|
|
uint16_t tac; // 16-bit tac
|
|
uint16_t mcc; // BCD-coded with 0xF filler
|
|
uint16_t mnc; // BCD-coded with 0xF filler
|
|
std::string mme_addr;
|
|
std::string gtp_bind_addr;
|
|
std::string s1c_bind_addr;
|
|
std::string enb_name;
|
|
};
|
|
|
|
// S1AP interface for RRC
|
|
class s1ap_interface_rrc
|
|
{
|
|
public:
|
|
struct bearer_status_info {
|
|
uint8_t erab_id;
|
|
uint16_t pdcp_dl_sn, pdcp_ul_sn;
|
|
uint16_t dl_hfn, ul_hfn;
|
|
};
|
|
|
|
virtual void initial_ue(uint16_t rnti,
|
|
uint32_t enb_cc_idx,
|
|
asn1::s1ap::rrc_establishment_cause_e cause,
|
|
srsran::unique_byte_buffer_t pdu) = 0;
|
|
virtual void initial_ue(uint16_t rnti,
|
|
uint32_t enb_cc_idx,
|
|
asn1::s1ap::rrc_establishment_cause_e cause,
|
|
srsran::unique_byte_buffer_t pdu,
|
|
uint32_t m_tmsi,
|
|
uint8_t mmec) = 0;
|
|
|
|
virtual void write_pdu(uint16_t rnti, srsran::unique_byte_buffer_t pdu) = 0;
|
|
virtual bool user_exists(uint16_t rnti) = 0;
|
|
virtual void user_mod(uint16_t old_rnti, uint16_t new_rnti) = 0;
|
|
virtual bool user_release(uint16_t rnti, asn1::s1ap::cause_radio_network_e cause_radio) = 0;
|
|
virtual void ue_ctxt_setup_complete(uint16_t rnti, const asn1::s1ap::init_context_setup_resp_s& res) = 0;
|
|
virtual void ue_erab_setup_complete(uint16_t rnti, const asn1::s1ap::erab_setup_resp_s& res) = 0;
|
|
virtual bool is_mme_connected() = 0;
|
|
|
|
/**
|
|
* Command the s1ap to transmit a HandoverRequired message to MME.
|
|
* This message initiates the S1 handover preparation procedure at the Source eNB
|
|
*
|
|
* @param rnti user to perform S1 handover
|
|
* @param target_eci eNB Id + Cell Id of the target eNB
|
|
* @param target_plmn PLMN of the target eNB
|
|
* @param fwd_erabs E-RABs that are candidates to DL forwarding
|
|
* @param rrc_container RRC container with SourceENBToTargetENBTransparentContainer message.
|
|
* @return true if successful
|
|
*/
|
|
virtual bool send_ho_required(uint16_t rnti,
|
|
uint32_t target_eci,
|
|
srsran::plmn_id_t target_plmn,
|
|
srsran::span<uint32_t> fwd_erabs,
|
|
srsran::unique_byte_buffer_t rrc_container) = 0;
|
|
|
|
/**
|
|
* Command the s1ap to transmit eNBStatusTransfer message to MME. This message passes the PDCP context of the UE
|
|
* performing S1 handover from source eNB to target eNB.
|
|
*
|
|
* @param rnti user to perform S1 handover
|
|
* @param bearer_status_list PDCP SN and HFN status of the bearers to be preserved at target eNB
|
|
* @return true if successful
|
|
*/
|
|
virtual bool send_enb_status_transfer_proc(uint16_t rnti, std::vector<bearer_status_info>& bearer_status_list) = 0;
|
|
|
|
/* Acknowledge Handover Request message back to MME.
|
|
* This message signals the completion of the HandoverPreparation from the TeNB point of view. */
|
|
virtual bool send_ho_req_ack(const asn1::s1ap::ho_request_s& msg,
|
|
uint16_t rnti,
|
|
uint32_t enb_cc_idx,
|
|
srsran::unique_byte_buffer_t ho_cmd,
|
|
srsran::span<asn1::s1ap::erab_admitted_item_s> admitted_bearers) = 0;
|
|
|
|
/**
|
|
* Notify MME that Handover is complete
|
|
*/
|
|
virtual void send_ho_notify(uint16_t rnti, uint64_t target_eci) = 0;
|
|
|
|
/**
|
|
* Cancel on-going S1 Handover. MME should release UE context in target eNB
|
|
* SeNB --> MME
|
|
*/
|
|
virtual void send_ho_cancel(uint16_t rnti) = 0;
|
|
|
|
/**
|
|
* Called during release of a subset of eNB E-RABs. Send E-RAB RELEASE INDICATION to MME.
|
|
* SeNB --> MME
|
|
*/
|
|
virtual bool release_erabs(uint16_t rnti, const std::vector<uint16_t>& erabs_successfully_released) = 0;
|
|
|
|
virtual bool send_ue_cap_info_indication(uint16_t rnti, srsran::unique_byte_buffer_t ue_radio_cap) = 0;
|
|
};
|
|
|
|
} // namespace srsenb
|
|
|
|
#endif // SRSRAN_ENB_S1AP_INTERFACES_H
|