diff options
Diffstat (limited to 'src/encoding.cpp')
| -rw-r--r-- | src/encoding.cpp | 65 |
1 files changed, 61 insertions, 4 deletions
diff --git a/src/encoding.cpp b/src/encoding.cpp index b57117f4..d05177fb 100644 --- a/src/encoding.cpp +++ b/src/encoding.cpp @@ -431,6 +431,54 @@ static void write_packet_uplink_ack_gprs(struct gprs_rlcmac_bts *bts, acknack_data->Exist_Power_Control_Parameters = 0x0; } +static void write_packet_uplink_ack_egprs(struct gprs_rlcmac_bts *bts, + PU_AckNack_EGPRS_00_t *acknack, struct gprs_rlcmac_ul_tbf *tbf, + int is_final) +{ + Common_Uplink_Ack_Nack_Data_t *acknack_data = + &acknack->Common_Uplink_Ack_Nack_Data; + char rbb[65]; + + int bow = 1; + int eow = 1; + int ssn = (tbf->m_window.v_q() + 1) & tbf->m_window.mod_sns(); + + tbf->m_window.update_rbb(rbb); + + /* rbb is not NULL terminated */ + rbb[64] = 0; + LOGP(DRLCMACUL, LOGL_DEBUG, "- V(N): \"%s\" R=Received " + "I=Invalid\n", rbb); + + /* TODO: Use tbf->current_cs() when it supports EGPRS */ + acknack->EGPRS_ChannelCodingCommand = 2; /* MCS-3 */ + acknack->RESEGMENT = 0; /* NYI */ + acknack->PRE_EMPTIVE_TRANSMISSION = 1; /* TODO: This resembles GPRS, change it? */ + acknack->PRR_RETRANSMISSION_REQUEST = 0; /* TODO: Needs clarification */ + acknack->ARAC_RETRANSMISSION_REQUEST = 0; /* TODO: Needs clarification */ + + acknack_data->Exist_CONTENTION_RESOLUTION_TLLI = 0x1; + acknack_data->CONTENTION_RESOLUTION_TLLI = tbf->tlli(); + + acknack->TBF_EST = 1; /* Enable RR on PACCH */ + + acknack_data->Exist_Packet_Timing_Advance = 0x0; + acknack->Exist_Packet_Extended_Timing_Advance = 0x0; + acknack_data->Exist_Power_Control_Parameters = 0x0; + acknack_data->Exist_Extension_Bits = 0x0; + + acknack->EGPRS_AckNack.UnionType = 0; + + acknack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION = is_final; + acknack->EGPRS_AckNack.Desc.BEGINNING_OF_WINDOW = eow; + acknack->EGPRS_AckNack.Desc.END_OF_WINDOW = bow; + acknack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER = ssn; + acknack->EGPRS_AckNack.Desc.Exist_CRBB = 0; /* TODO: Implement compressed bitmaps */ + acknack->EGPRS_AckNack.Desc.URBB_LENGTH = 64; + + Encoding::encode_rbb(rbb, acknack->EGPRS_AckNack.Desc.URBB); +} + /* generate uplink ack */ void Encoding::write_packet_uplink_ack(struct gprs_rlcmac_bts *bts, RlcMacDownlink_t * block, struct gprs_rlcmac_ul_tbf *tbf, @@ -453,10 +501,19 @@ void Encoding::write_packet_uplink_ack(struct gprs_rlcmac_bts *bts, acknack->PAGE_MODE = 0x0; // Normal Paging acknack->UPLINK_TFI = tbf->tfi(); // Uplink TFI - /* PU_AckNack_GPRS = on */ - acknack->UnionType = 0x0; - write_packet_uplink_ack_gprs(bts, - &acknack->u.PU_AckNack_GPRS_Struct, tbf, final); + if (tbf->is_egprs_enabled()) { + /* PU_AckNack_EGPRS = on */ + acknack->UnionType = 0x1; + acknack->u.PU_AckNack_EGPRS_Struct.UnionType = 0x0; + write_packet_uplink_ack_egprs(bts, + &acknack->u.PU_AckNack_EGPRS_Struct.u.PU_AckNack_EGPRS_00, + tbf, final); + } else { + /* PU_AckNack_GPRS = on */ + acknack->UnionType = 0x0; + write_packet_uplink_ack_gprs(bts, + &acknack->u.PU_AckNack_GPRS_Struct, tbf, final); + } } unsigned Encoding::write_packet_paging_request(bitvec * dest) |