/* Encode UCI CQI/PMI for payloads greater than 11 bits (go through CRC, conv coder and rate match) */ int encode_cqi_long(srslte_uci_cqi_pusch_t *q, uint8_t *data, uint32_t nof_bits, uint8_t *q_bits, uint32_t Q) { srslte_convcoder_t encoder; if (nof_bits + 8 < SRSLTE_UCI_MAX_CQI_LEN_PUSCH && q != NULL && data != NULL && q_bits != NULL) { int poly[3] = { 0x6D, 0x4F, 0x57 }; encoder.K = 7; encoder.R = 3; encoder.tail_biting = true; memcpy(encoder.poly, poly, 3 * sizeof(int)); memcpy(q->tmp_cqi, data, sizeof(uint8_t) * nof_bits); srslte_crc_attach(&q->crc, q->tmp_cqi, nof_bits); DEBUG("cqi_crc_tx="); if (SRSLTE_VERBOSE_ISDEBUG()) { srslte_vec_fprint_b(stdout, q->tmp_cqi, nof_bits+8); } srslte_convcoder_encode(&encoder, q->tmp_cqi, q->encoded_cqi, nof_bits + 8); DEBUG("cconv_tx="); if (SRSLTE_VERBOSE_ISDEBUG()) { srslte_vec_fprint_b(stdout, q->encoded_cqi, 3 * (nof_bits + 8)); } srslte_rm_conv_tx(q->encoded_cqi, 3 * (nof_bits + 8), q_bits, Q); return SRSLTE_SUCCESS; } else { return SRSLTE_ERROR_INVALID_INPUTS; } }
/* Encode a transport block according to 36.212 5.3.2 * */ static int encode_tb(srslte_sch_t *q, srslte_softbuffer_tx_t *soft_buffer, srslte_cbsegm_t *cb_segm, uint32_t Qm, uint32_t rv, uint32_t nof_e_bits, uint8_t *data, uint8_t *e_bits) { uint8_t parity[24]; uint8_t *p_parity = parity; uint32_t par; uint32_t i; uint32_t cb_len, rp, wp, rlen, F, n_e; int ret = SRSLTE_ERROR_INVALID_INPUTS; if (q != NULL && e_bits != NULL && cb_segm != NULL && soft_buffer != NULL) { uint32_t Gp = nof_e_bits / Qm; uint32_t gamma = Gp; if (cb_segm->C > 0) { gamma = Gp%cb_segm->C; } if (data) { /* Compute transport block CRC */ par = srslte_crc_checksum(&q->crc_tb, data, cb_segm->tbs); /* parity bits will be appended later */ srslte_bit_pack(par, &p_parity, 24); if (SRSLTE_VERBOSE_ISDEBUG()) { DEBUG("DATA: ", 0); srslte_vec_fprint_b(stdout, data, cb_segm->tbs); DEBUG("PARITY: ", 0); srslte_vec_fprint_b(stdout, parity, 24); } } wp = 0; rp = 0; for (i = 0; i < cb_segm->C; i++) { /* Get read lengths */ if (i < cb_segm->C2) { cb_len = cb_segm->K2; } else { cb_len = cb_segm->K1; } if (cb_segm->C > 1) { rlen = cb_len - 24; } else { rlen = cb_len; } if (i == 0) { F = cb_segm->F; } else { F = 0; } if (i <= cb_segm->C - gamma - 1) { n_e = Qm * (Gp/cb_segm->C); } else { n_e = Qm * ((uint32_t) ceilf((float) Gp/cb_segm->C)); } INFO("CB#%d: cb_len: %d, rlen: %d, wp: %d, rp: %d, F: %d, E: %d\n", i, cb_len, rlen - F, wp, rp, F, n_e); if (data) { /* Copy data to another buffer, making space for the Codeblock CRC */ if (i < cb_segm->C - 1) { // Copy data memcpy(&q->cb_in[F], &data[rp], (rlen - F) * sizeof(uint8_t)); } else { INFO("Last CB, appending parity: %d from %d and 24 to %d\n", rlen - F - 24, rp, rlen - 24); /* Append Transport Block parity bits to the last CB */ memcpy(&q->cb_in[F], &data[rp], (rlen - 24 - F) * sizeof(uint8_t)); memcpy(&q->cb_in[rlen - 24], parity, 24 * sizeof(uint8_t)); } /* Filler bits are treated like zeros for the CB CRC calculation */ for (int j = 0; j < F; j++) { q->cb_in[j] = 0; } /* Attach Codeblock CRC */ if (cb_segm->C > 1) { srslte_crc_attach(&q->crc_cb, q->cb_in, rlen); } /* Set the filler bits to <NULL> */ for (int j = 0; j < F; j++) { q->cb_in[j] = SRSLTE_TX_NULL; } if (SRSLTE_VERBOSE_ISDEBUG()) { DEBUG("CB#%d: ", i); srslte_vec_fprint_b(stdout, q->cb_in, cb_len); } /* Turbo Encoding */ srslte_tcod_encode(&q->encoder, q->cb_in, (uint8_t*) q->cb_out, cb_len); } /* Rate matching */ if (srslte_rm_turbo_tx(soft_buffer->buffer_b[i], soft_buffer->buff_size, (uint8_t*) q->cb_out, 3 * cb_len + 12, &e_bits[wp], n_e, rv)) { fprintf(stderr, "Error in rate matching\n"); return SRSLTE_ERROR; } /* Set read/write pointers */ rp += (rlen - F); wp += n_e; } INFO("END CB#%d: wp: %d, rp: %d\n", i, wp, rp); ret = SRSLTE_SUCCESS; } return ret; }