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-rw-r--r--src/encoding.cpp9
1 files changed, 7 insertions, 2 deletions
diff --git a/src/encoding.cpp b/src/encoding.cpp
index 9def283..a26a5db 100644
--- a/src/encoding.cpp
+++ b/src/encoding.cpp
@@ -208,13 +208,14 @@ void Encoding::write_packet_uplink_assignment(
}
} else { /* EPGRS */
+ unsigned int ws_enc = (tbf->m_window.ws() - 64) / 32;
bitvec_write_field(dest, wp,0x1,1); // Message escape
bitvec_write_field(dest, wp,0x0,2); // EGPRS message contents
bitvec_write_field(dest, wp,0x0,1); // No CONTENTION_RESOLUTION_TLLI
bitvec_write_field(dest, wp,0x0,1); // No COMPACT reduced MA
bitvec_write_field(dest, wp,tbf->current_cs().to_num()-1, 4); // EGPRS Modulation and Coding IE
bitvec_write_field(dest, wp,0x0,1); // No RESEGMENT
- bitvec_write_field(dest, wp,0x0,5); // EGPRS Window Size = 64
+ bitvec_write_field(dest, wp,ws_enc,5); // EGPRS Window Size
bitvec_write_field(dest, wp,0x0,1); // No Access Technologies Request
bitvec_write_field(dest, wp,0x0,1); // No ARAC RETRANSMISSION REQUEST
bitvec_write_field(dest, wp,0x1,1); // TLLI_BLOCK_CHANNEL_CODING
@@ -282,6 +283,7 @@ void Encoding::write_packet_downlink_assignment(RlcMacDownlink_t * block,
PDA_AdditionsR99_t *pda_r99;
uint8_t tn;
+ unsigned int ws_enc;
block->PAYLOAD_TYPE = 0x1; // RLC/MAC control block that does not include the optional octets of the RLC/MAC control header
block->RRBP = 0x0; // N+13
@@ -348,10 +350,13 @@ void Encoding::write_packet_downlink_assignment(RlcMacDownlink_t * block,
block->u.Packet_Downlink_Assignment.Exist_AdditionsR99 = 0x0; // AdditionsR99 = off
return;
}
+
+ ws_enc = (tbf->window()->ws() - 64) / 32;
+
block->u.Packet_Downlink_Assignment.Exist_AdditionsR99 = 0x1; // AdditionsR99 = on
pda_r99 = &block->u.Packet_Downlink_Assignment.AdditionsR99;
pda_r99->Exist_EGPRS_Params = 1;
- pda_r99->EGPRS_WindowSize = 0; /* 64, see TS 44.060, table 12.5.2.1 */
+ pda_r99->EGPRS_WindowSize = ws_enc; /* see TS 44.060, table 12.5.2.1 */
pda_r99->LINK_QUALITY_MEASUREMENT_MODE = 0x0; /* no meas, see TS 44.060, table 11.2.7.2 */
pda_r99->Exist_BEP_PERIOD2 = 0; /* No extra EGPRS BEP PERIOD */
pda_r99->Exist_Packet_Extended_Timing_Advance = 0;