diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/bts.h | 4 | ||||
| -rw-r--r-- | src/rlc.h | 45 |
2 files changed, 45 insertions, 4 deletions
@@ -186,6 +186,10 @@ struct gprs_rlcmac_bts { uint8_t alpha, gamma; uint8_t egprs_enabled; uint32_t dl_tbf_idle_msec; /* hold time for idle DL TBFs */ + + /* 0 to support resegmentation in DL, 1 for no reseg */ + uint8_t dl_arq_type; + uint32_t ms_idle_sec; uint8_t cs_adj_enabled; uint8_t cs_adj_upper_limit; @@ -84,6 +84,39 @@ enum egprs_rlc_ul_reseg_bsn_state { }; /* + * EGPRS resegment status information for DL + * When only first segment is sent, bsn state + * will be set to EGPRS_RESEG_FIRST_SEG_SENT and when + * second segment is sent the state will be + * set to EGPRS_RESEG_SECOND_SEG_SENT. + * EGPRS_RESEG_DL_INVALID is set to 8 considering there is a scope for + * 3rd segment according to Table 10.4.8b.2 of 44.060 + * The EGPRS resegmentation feature allows PCU to retransmit + * RLC blocks of HeaderType1, HeaderType2 by segmenting + * them to 2 HeaderType3 blocks(Example MCS5 will be + * retransmitted as 2 MCS2 blocks). Table 10.4.8b.2 of 44.060 + * explains the possible values of SPB in HeadrType3 for DL + * direction.The PCU decides to retransmit the + * blocks by resegmenting it based on Table 8.1.1.1 of 44.060. + * The retransmission MCS is calculated based on current MCS of + * the Block and demanded MCS by PCU. Section 10.3a.3.3 of 44.060 + * shows the HeadrType3 with SPB field present in it + */ +enum egprs_rlc_dl_reseg_bsn_state { + EGPRS_RESEG_DL_DEFAULT = 0, + EGPRS_RESEG_FIRST_SEG_SENT = 0x01, + EGPRS_RESEG_SECOND_SEG_SENT = 0x02, + EGPRS_RESEG_DL_INVALID = 0x08 +}; + +/* Table 10.4.8b.2 of 44.060 */ +enum egprs_rlcmac_dl_spb { + EGPRS_RLCMAC_DL_NO_RETX = 0, + EGPRS_RLCMAC_DL_FIRST_SEG = 2, + EGPRS_RLCMAC_DL_SEC_SEG = 3, +}; + +/* * Valid puncturing scheme values * TS 44.060 10.4.8a.3.1, 10.4.8a.2.1, 10.4.8a.1.1 */ @@ -140,10 +173,7 @@ struct gprs_rlc_data_info { /* holds the current status of the block w.r.t UL/DL split blocks */ union split_block_status { egprs_rlc_ul_reseg_bsn_state block_status_ul; - /* - * TODO: DL split block status need to be supported - * for EGPRS DL - */ + egprs_rlc_dl_reseg_bsn_state block_status_dl; }; struct gprs_rlc_data { @@ -168,6 +198,13 @@ struct gprs_rlc_data { GprsCodingScheme cs_current_trans; GprsCodingScheme cs_last; + /* + * The MCS of initial transmission of a BSN + * This variable is used for split block + * processing in DL + */ + GprsCodingScheme cs_init; + /* puncturing scheme value to be used for next transmission*/ enum egprs_puncturing_values next_ps; |