257 lines
7.4 KiB
C
257 lines
7.4 KiB
C
/* gprs_rlcmac.h
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*
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* Copyright (C) 2012 Ivan Klyuchnikov
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* Copyright (C) 2013 by Holger Hans Peter Freyther
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef GPRS_RLCMAC_H
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#define GPRS_RLCMAC_H
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#ifdef __cplusplus
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#include <bitvector.h>
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#include <gsm_rlcmac.h>
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#include <gsm_timer.h>
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extern "C" {
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/core/timer.h>
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}
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#endif
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/* generate a diagram for debugging timing issues */
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//#define DEBUG_DIAGRAM
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/* This special feature will delay assignment of downlink TBF by one second,
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* in case there is already a TBF.
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* This is usefull to debug downlink establishment during packet idle mode.
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*/
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//#define DEBUG_DL_ASS_IDLE
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/*
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* PDCH instanc
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*/
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struct gprs_rlcmac_tbf;
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struct gprs_rlcmac_pdch {
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uint8_t enable; /* TS is enabled */
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uint8_t tsc; /* TSC of this slot */
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uint8_t next_ul_tfi; /* next uplink TBF/TFI to schedule (0..31) */
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uint8_t next_dl_tfi; /* next downlink TBF/TFI to schedule (0..31) */
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struct gprs_rlcmac_tbf *ul_tbf[32]; /* array of UL TBF, by UL TFI */
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struct gprs_rlcmac_tbf *dl_tbf[32]; /* array of DL TBF, by DL TFI */
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struct llist_head paging_list; /* list of paging messages */
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uint32_t last_rts_fn; /* store last frame number of RTS */
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};
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struct gprs_rlcmac_trx {
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void *fl1h;
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uint16_t arfcn;
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struct gprs_rlcmac_pdch pdch[8];
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struct gprs_rlcmac_tbf *ul_tbf[32]; /* array of UL TBF, by UL TFI */
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struct gprs_rlcmac_tbf *dl_tbf[32]; /* array of DL TBF, by DL TFI */
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};
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struct gprs_rlcmac_bts {
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uint8_t bsic;
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uint8_t fc_interval;
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uint8_t cs1;
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uint8_t cs2;
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uint8_t cs3;
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uint8_t cs4;
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uint8_t initial_cs_dl, initial_cs_ul;
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uint8_t force_cs; /* 0=use from BTS 1=use from VTY */
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uint16_t force_llc_lifetime; /* overrides lifetime from SGSN */
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uint8_t t3142;
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uint8_t t3169;
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uint8_t t3191;
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uint16_t t3193_msec;
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uint8_t t3195;
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uint8_t n3101;
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uint8_t n3103;
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uint8_t n3105;
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struct gprs_rlcmac_trx trx[8];
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int (*alloc_algorithm)(struct gprs_rlcmac_bts *bts,
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struct gprs_rlcmac_tbf *old_tbf,
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struct gprs_rlcmac_tbf *tbf, uint32_t cust, uint8_t single);
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uint32_t alloc_algorithm_curst; /* options to customize algorithm */
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uint8_t force_two_phase;
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uint8_t alpha, gamma;
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};
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extern struct gprs_rlcmac_bts *gprs_rlcmac_bts;
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#ifdef __cplusplus
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/*
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* paging entry
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*/
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struct gprs_rlcmac_paging {
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struct llist_head list;
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uint8_t chan_needed;
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uint8_t identity_lv[9];
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};
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/*
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* single block allocation entry
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*/
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struct gprs_rlcmac_sba {
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struct llist_head list;
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uint8_t trx;
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uint8_t ts;
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uint32_t fn;
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uint8_t ta;
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};
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/*
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* coding scheme info
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*/
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struct gprs_rlcmac_cs {
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uint8_t block_length;
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uint8_t block_data;
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uint8_t block_payload;
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};
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extern struct gprs_rlcmac_cs gprs_rlcmac_cs[];
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#ifdef DEBUG_DIAGRAM
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void debug_diagram(int diag, const char *format, ...);
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#else
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#define debug_diagram(a, b, args...) ;
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#endif
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int gprs_rlcmac_received_lost(struct gprs_rlcmac_tbf *tbf, uint16_t received,
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uint16_t lost);
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int gprs_rlcmac_lost_rep(struct gprs_rlcmac_tbf *tbf);
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int gprs_rlcmac_meas_rep(Packet_Measurement_Report_t *pmr);
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int gprs_rlcmac_rssi(struct gprs_rlcmac_tbf *tbf, int8_t rssi);
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int gprs_rlcmac_rssi_rep(struct gprs_rlcmac_tbf *tbf);
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int gprs_rlcmac_dl_bw(struct gprs_rlcmac_tbf *tbf, uint16_t octets);
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int sba_alloc(uint8_t *_trx, uint8_t *_ts, uint32_t *_fn, uint8_t ta);
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struct gprs_rlcmac_sba *sba_find(uint8_t trx, uint8_t ts, uint32_t fn);
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/* TS 44.060 Section 10.4.7 Table 10.4.7.1: Payload Type field */
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enum gprs_rlcmac_block_type {
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GPRS_RLCMAC_DATA_BLOCK = 0x0,
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GPRS_RLCMAC_CONTROL_BLOCK = 0x1,
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GPRS_RLCMAC_CONTROL_BLOCK_OPT = 0x2,
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GPRS_RLCMAC_RESERVED = 0x3
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};
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int gprs_rlcmac_rcv_block(uint8_t trx, uint8_t ts, uint8_t *data, uint8_t len,
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uint32_t fn, int8_t rssi);
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int write_immediate_assignment(bitvec * dest, uint8_t downlink, uint8_t ra,
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uint32_t ref_fn, uint8_t ta, uint16_t arfcn, uint8_t ts, uint8_t tsc,
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uint8_t tfi, uint8_t usf, uint32_t tlli, uint8_t polling,
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uint32_t fn, uint8_t single_block, uint8_t alpha, uint8_t gamma,
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int8_t ta_idx);
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void write_packet_uplink_assignment(bitvec * dest, uint8_t old_tfi,
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uint8_t old_downlink, uint32_t tlli, uint8_t use_tlli,
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struct gprs_rlcmac_tbf *tbf, uint8_t poll, uint8_t alpha,
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uint8_t gamma, int8_t ta_idx);
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void write_packet_downlink_assignment(RlcMacDownlink_t * block, uint8_t old_tfi,
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uint8_t old_downlink, struct gprs_rlcmac_tbf *tbf, uint8_t poll,
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uint8_t alpha, uint8_t gamma, int8_t ta_idx, uint8_t ta_ts);
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void write_packet_uplink_ack(RlcMacDownlink_t * block, struct gprs_rlcmac_tbf *tbf,
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uint8_t final);
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int gprs_rlcmac_tx_ul_ud(gprs_rlcmac_tbf *tbf);
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int gprs_rlcmac_poll_timeout(struct gprs_rlcmac_tbf *tbf);
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int gprs_rlcmac_sba_timeout(struct gprs_rlcmac_sba *sba);
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int gprs_rlcmac_rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta);
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int gprs_rlcmac_rcv_control_block(bitvec *rlc_block, uint8_t trx, uint8_t ts,
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uint32_t fn);
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struct msgb *gprs_rlcmac_send_packet_uplink_assignment(
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struct gprs_rlcmac_tbf *tbf, uint32_t fn);
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struct msgb *gprs_rlcmac_send_packet_downlink_assignment(
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struct gprs_rlcmac_tbf *tbf, uint32_t fn);
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void gprs_rlcmac_trigger_downlink_assignment(struct gprs_rlcmac_tbf *tbf,
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struct gprs_rlcmac_tbf *old_tbf, const char *imsi);
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int gprs_rlcmac_downlink_ack(struct gprs_rlcmac_tbf *tbf, uint8_t final,
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uint8_t ssn, uint8_t *rbb);
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int gprs_rlcmac_paging_request(uint8_t *ptmsi, uint16_t ptmsi_len,
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const char *imsi);
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unsigned write_packet_paging_request(bitvec * dest);
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unsigned write_repeated_page_info(bitvec * dest, unsigned& wp, uint8_t len,
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uint8_t *identity, uint8_t chan_needed);
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int gprs_rlcmac_rcv_data_block_acknowledged(uint8_t trx, uint8_t ts,
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uint8_t *data, uint8_t len, int8_t rssi);
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struct msgb *gprs_rlcmac_send_data_block_acknowledged(
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struct gprs_rlcmac_tbf *tbf, uint32_t fn, uint8_t ts);
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struct msgb *gprs_rlcmac_send_uplink_ack(struct gprs_rlcmac_tbf *tbf,
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uint32_t fn);
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int gprs_rlcmac_rcv_rts_block(uint8_t trx, uint8_t ts, uint16_t arfcn,
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uint32_t fn, uint8_t block_nr);
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int gprs_rlcmac_imm_ass_cnf(uint8_t *data, uint32_t fn);
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int gprs_rlcmac_add_paging(uint8_t chan_needed, uint8_t *identity_lv);
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struct gprs_rlcmac_paging *gprs_rlcmac_dequeue_paging(
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struct gprs_rlcmac_pdch *pdch);
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struct msgb *gprs_rlcmac_send_packet_paging_request(
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struct gprs_rlcmac_pdch *pdch);
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int remember_timing_advance(uint32_t tlli, uint8_t ta);
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int recall_timing_advance(uint32_t tlli);
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int flush_timing_advance(void);
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extern "C" {
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#endif
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int alloc_algorithm_a(struct gprs_rlcmac_bts *bts,
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struct gprs_rlcmac_tbf *old_tbf,
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struct gprs_rlcmac_tbf *tbf, uint32_t cust, uint8_t single);
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int alloc_algorithm_b(struct gprs_rlcmac_bts *bts,
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struct gprs_rlcmac_tbf *old_tbf,
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struct gprs_rlcmac_tbf *tbf, uint32_t cust, uint8_t single);
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#ifdef __cplusplus
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}
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#endif
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#endif // GPRS_RLCMAC_H
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