diff options
| -rw-r--r-- | src/rlc.h | 40 |
1 files changed, 40 insertions, 0 deletions
@@ -56,6 +56,34 @@ enum gprs_rlc_dl_bsn_state { }; /* + * EGPRS resegment status information for UL + * When only first split block is received bsn state + * will be set to EGPRS_RESEG_FIRST_SEG_RXD and when + * only second segment is received the state will be + * set to EGPRS_RESEG_SECOND_SEG_RXD. When both Split + * blocks are received the state will be set to + * EGPRS_RESEG_DEFAULT + * The EGPRS resegmentation feature allows MS 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.1 of 44.060 + * explains the possible values of SPB in HeadrType3 for UL + * direction. When the MCS is changed at the PCU, PCU directs the + * changed MCS to MS by PUAN or UPLINK ASSIGNMENT message along + * with RESEGMENT flag, Then MS may decide 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.4.3 of 44.060 + * shows the HeadrType3 with SPB field present in it +*/ +enum egprs_rlc_ul_reseg_bsn_state { + EGPRS_RESEG_DEFAULT = 0, + EGPRS_RESEG_FIRST_SEG_RXD = 0x01, + EGPRS_RESEG_SECOND_SEG_RXD = 0x02, + EGPRS_RESEG_INVALID = 0x04 +}; + +/* * Valid puncturing scheme values * TS 44.060 10.4.8a.3.1, 10.4.8a.2.1, 10.4.8a.1.1 */ @@ -109,6 +137,15 @@ struct gprs_rlc_data_info { struct gprs_rlc_data_block_info block_info[2]; }; +/* 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 + */ +}; + struct gprs_rlc_data { uint8_t *prepare(size_t block_data_length); void put_data(const uint8_t *data, size_t len); @@ -133,6 +170,9 @@ struct gprs_rlc_data { /* puncturing scheme value to be used for next transmission*/ enum egprs_puncturing_values next_ps; + + /* holds the status of the block w.r.t UL/DL split blocks*/ + union split_block_status spb_status; }; void gprs_rlc_data_info_init_dl(struct gprs_rlc_data_info *rlc, |