| /* encoding.cpp |
| * |
| * Copyright (C) 2012 Ivan Klyuchnikov |
| * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
| * Copyright (C) 2013 by Holger Hans Peter Freyther |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| |
| #include <encoding.h> |
| #include <gprs_rlcmac.h> |
| #include <bts.h> |
| #include <tbf.h> |
| #include <gprs_debug.h> |
| |
| // GSM 04.08 9.1.18 Immediate assignment |
| int Encoding::write_immediate_assignment( |
| struct gprs_rlcmac_bts *bts, |
| bitvec * dest, uint8_t downlink, uint8_t ra, |
| uint32_t ref_fn, uint8_t ta, uint16_t arfcn, uint8_t ts, uint8_t tsc, |
| uint8_t tfi, uint8_t usf, uint32_t tlli, |
| uint8_t polling, uint32_t fn, uint8_t single_block, uint8_t alpha, |
| uint8_t gamma, int8_t ta_idx) |
| { |
| unsigned wp = 0; |
| uint8_t plen; |
| |
| bitvec_write_field(dest, wp,0x0,4); // Skip Indicator |
| bitvec_write_field(dest, wp,0x6,4); // Protocol Discriminator |
| bitvec_write_field(dest, wp,0x3F,8); // Immediate Assignment Message Type |
| |
| // 10.5.2.25b Dedicated mode or TBF |
| bitvec_write_field(dest, wp,0x0,1); // spare |
| bitvec_write_field(dest, wp,0x0,1); // TMA : Two-message assignment: No meaning |
| bitvec_write_field(dest, wp,downlink,1); // Downlink : Downlink assignment to mobile in packet idle mode |
| bitvec_write_field(dest, wp,0x1,1); // T/D : TBF or dedicated mode: this message assigns a Temporary Block Flow (TBF). |
| |
| bitvec_write_field(dest, wp,0x0,4); // Page Mode |
| |
| // GSM 04.08 10.5.2.25a Packet Channel Description |
| bitvec_write_field(dest, wp,0x1,5); // Channel type |
| bitvec_write_field(dest, wp,ts,3); // TN |
| bitvec_write_field(dest, wp,tsc,3); // TSC |
| bitvec_write_field(dest, wp,0x0,3); // non-hopping RF channel configuraion |
| bitvec_write_field(dest, wp,arfcn,10); // ARFCN |
| |
| //10.5.2.30 Request Reference |
| bitvec_write_field(dest, wp,ra,8); // RA |
| bitvec_write_field(dest, wp,(ref_fn / (26 * 51)) % 32,5); // T1' |
| bitvec_write_field(dest, wp,ref_fn % 51,6); // T3 |
| bitvec_write_field(dest, wp,ref_fn % 26,5); // T2 |
| |
| // 10.5.2.40 Timing Advance |
| bitvec_write_field(dest, wp,0x0,2); // spare |
| bitvec_write_field(dest, wp,ta,6); // Timing Advance value |
| |
| // No mobile allocation in non-hopping systems. |
| // A zero-length LV. Just write L=0. |
| bitvec_write_field(dest, wp,0,8); |
| |
| if ((wp % 8)) { |
| LOGP(DRLCMACUL, LOGL_ERROR, "Length of IMM.ASS without rest " |
| "octets is not multiple of 8 bits, PLEASE FIX!\n"); |
| exit (0); |
| } |
| plen = wp / 8; |
| |
| if (downlink) |
| { |
| // GSM 04.08 10.5.2.16 IA Rest Octets |
| bitvec_write_field(dest, wp, 3, 2); // "HH" |
| bitvec_write_field(dest, wp, 1, 2); // "01" Packet Downlink Assignment |
| bitvec_write_field(dest, wp,tlli,32); // TLLI |
| bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| bitvec_write_field(dest, wp,tfi,5); // TFI |
| bitvec_write_field(dest, wp,0x0,1); // RLC acknowledged mode |
| if (alpha) { |
| bitvec_write_field(dest, wp,0x1,1); // ALPHA = present |
| bitvec_write_field(dest, wp,alpha,4); // ALPHA |
| } else { |
| bitvec_write_field(dest, wp,0x0,1); // ALPHA = not present |
| } |
| bitvec_write_field(dest, wp,gamma,5); // GAMMA power control parameter |
| bitvec_write_field(dest, wp,polling,1); // Polling Bit |
| bitvec_write_field(dest, wp,!polling,1); // TA_VALID ??? |
| if (ta_idx < 0) { |
| bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off |
| } else { |
| bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on |
| bitvec_write_field(dest, wp,ta_idx,4); // TIMING_ADVANCE_INDEX |
| } |
| if (polling) { |
| bitvec_write_field(dest, wp,0x1,1); // TBF Starting TIME present |
| bitvec_write_field(dest, wp,(fn / (26 * 51)) % 32,5); // T1' |
| bitvec_write_field(dest, wp,fn % 51,6); // T3 |
| bitvec_write_field(dest, wp,fn % 26,5); // T2 |
| } else { |
| bitvec_write_field(dest, wp,0x0,1); // TBF Starting TIME present |
| } |
| bitvec_write_field(dest, wp,0x0,1); // P0 not present |
| // bitvec_write_field(dest, wp,0x1,1); // P0 not present |
| // bitvec_write_field(dest, wp,0xb,4); |
| } |
| else |
| { |
| // GMS 04.08 10.5.2.37b 10.5.2.16 |
| bitvec_write_field(dest, wp, 3, 2); // "HH" |
| bitvec_write_field(dest, wp, 0, 2); // "0" Packet Uplink Assignment |
| if (single_block) { |
| bitvec_write_field(dest, wp, 0, 1); // Block Allocation : Single Block Allocation |
| if (alpha) { |
| bitvec_write_field(dest, wp,0x1,1); // ALPHA = present |
| bitvec_write_field(dest, wp,alpha,4); // ALPHA = present |
| } else |
| bitvec_write_field(dest, wp,0x0,1); // ALPHA = not present |
| bitvec_write_field(dest, wp,gamma,5); // GAMMA power control parameter |
| if (ta_idx < 0) { |
| bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off |
| } else { |
| bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on |
| bitvec_write_field(dest, wp,ta_idx,4); // TIMING_ADVANCE_INDEX |
| } |
| bitvec_write_field(dest, wp, 1, 1); // TBF_STARTING_TIME_FLAG |
| bitvec_write_field(dest, wp,(fn / (26 * 51)) % 32,5); // T1' |
| bitvec_write_field(dest, wp,fn % 51,6); // T3 |
| bitvec_write_field(dest, wp,fn % 26,5); // T2 |
| } else { |
| bitvec_write_field(dest, wp, 1, 1); // Block Allocation : Not Single Block Allocation |
| bitvec_write_field(dest, wp, tfi, 5); // TFI_ASSIGNMENT Temporary Flow Identity |
| bitvec_write_field(dest, wp, 0, 1); // POLLING |
| bitvec_write_field(dest, wp, 0, 1); // ALLOCATION_TYPE: dynamic |
| bitvec_write_field(dest, wp, usf, 3); // USF |
| bitvec_write_field(dest, wp, 0, 1); // USF_GRANULARITY |
| bitvec_write_field(dest, wp, 0, 1); // "0" power control: Not Present |
| bitvec_write_field(dest, wp, bts->initial_cs_ul-1, 2); // CHANNEL_CODING_COMMAND |
| bitvec_write_field(dest, wp, 1, 1); // TLLI_BLOCK_CHANNEL_CODING |
| if (alpha) { |
| bitvec_write_field(dest, wp,0x1,1); // ALPHA = present |
| bitvec_write_field(dest, wp,alpha,4); // ALPHA |
| } else |
| bitvec_write_field(dest, wp,0x0,1); // ALPHA = not present |
| bitvec_write_field(dest, wp,gamma,5); // GAMMA power control parameter |
| /* note: there is no choise for TAI and no starting time */ |
| bitvec_write_field(dest, wp, 0, 1); // switch TIMING_ADVANCE_INDEX = off |
| bitvec_write_field(dest, wp, 0, 1); // TBF_STARTING_TIME_FLAG |
| } |
| } |
| |
| return plen; |
| } |
| |
| /* generate uplink assignment */ |
| void Encoding::write_packet_uplink_assignment( |
| struct gprs_rlcmac_bts *bts, |
| bitvec * dest, uint8_t old_tfi, |
| uint8_t old_downlink, uint32_t tlli, uint8_t use_tlli, |
| struct gprs_rlcmac_ul_tbf *tbf, uint8_t poll, uint8_t alpha, |
| uint8_t gamma, int8_t ta_idx) |
| { |
| // TODO We should use our implementation of encode RLC/MAC Control messages. |
| unsigned wp = 0; |
| uint8_t ts; |
| |
| bitvec_write_field(dest, wp,0x1,2); // Payload Type |
| bitvec_write_field(dest, wp,0x0,2); // Uplink block with TDMA framenumber (N+13) |
| bitvec_write_field(dest, wp,poll,1); // Suppl/Polling Bit |
| bitvec_write_field(dest, wp,0x0,3); // Uplink state flag |
| bitvec_write_field(dest, wp,0xa,6); // MESSAGE TYPE |
| |
| bitvec_write_field(dest, wp,0x0,2); // Page Mode |
| |
| bitvec_write_field(dest, wp,0x0,1); // switch PERSIST_LEVEL: off |
| if (use_tlli) { |
| bitvec_write_field(dest, wp,0x2,2); // switch TLLI : on |
| bitvec_write_field(dest, wp,tlli,32); // TLLI |
| } else { |
| bitvec_write_field(dest, wp,0x0,1); // switch TFI : on |
| bitvec_write_field(dest, wp,old_downlink,1); // 0=UPLINK TFI, 1=DL TFI |
| bitvec_write_field(dest, wp,old_tfi,5); // TFI |
| } |
| |
| bitvec_write_field(dest, wp,0x0,1); // Message escape |
| bitvec_write_field(dest, wp,tbf->current_cs()-1, 2); // CHANNEL_CODING_COMMAND |
| bitvec_write_field(dest, wp,0x1,1); // TLLI_BLOCK_CHANNEL_CODING |
| bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_VALUE = on |
| bitvec_write_field(dest, wp,tbf->ta(),6); // TIMING_ADVANCE_VALUE |
| if (ta_idx < 0) { |
| bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off |
| } else { |
| bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on |
| bitvec_write_field(dest, wp,ta_idx,4); // TIMING_ADVANCE_INDEX |
| } |
| |
| #if 1 |
| bitvec_write_field(dest, wp,0x1,1); // Frequency Parameters information elements = present |
| bitvec_write_field(dest, wp,tbf->tsc(),3); // Training Sequence Code (TSC) |
| bitvec_write_field(dest, wp,0x0,2); // ARFCN = present |
| bitvec_write_field(dest, wp,tbf->trx->arfcn,10); // ARFCN |
| #else |
| bitvec_write_field(dest, wp,0x0,1); // Frequency Parameters = off |
| #endif |
| |
| bitvec_write_field(dest, wp,0x1,2); // Dynamic Allocation |
| |
| bitvec_write_field(dest, wp,0x0,1); // Extended Dynamic Allocation = off |
| bitvec_write_field(dest, wp,0x0,1); // P0 = off |
| |
| bitvec_write_field(dest, wp,0x0,1); // USF_GRANULARITY |
| bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| bitvec_write_field(dest, wp,tbf->tfi(),5);// TFI |
| |
| bitvec_write_field(dest, wp,0x0,1); // |
| bitvec_write_field(dest, wp,0x0,1); // TBF Starting Time = off |
| if (alpha || gamma) { |
| bitvec_write_field(dest, wp,0x1,1); // Timeslot Allocation with Power Control |
| bitvec_write_field(dest, wp,alpha,4); // ALPHA |
| } else |
| bitvec_write_field(dest, wp,0x0,1); // Timeslot Allocation |
| |
| for (ts = 0; ts < 8; ts++) { |
| if (tbf->pdch[ts]) { |
| bitvec_write_field(dest, wp,0x1,1); // USF_TN(i): on |
| bitvec_write_field(dest, wp,tbf->m_usf[ts],3); // USF_TN(i) |
| if (alpha || gamma) |
| bitvec_write_field(dest, wp,gamma,5); // GAMMA power control parameter |
| } else |
| bitvec_write_field(dest, wp,0x0,1); // USF_TN(i): off |
| } |
| // bitvec_write_field(dest, wp,0x0,1); // Measurement Mapping struct not present |
| } |
| |
| |
| /* generate downlink assignment */ |
| void Encoding::write_packet_downlink_assignment(RlcMacDownlink_t * block, uint8_t old_tfi, |
| uint8_t old_downlink, struct gprs_rlcmac_tbf *tbf, uint8_t poll, |
| uint8_t alpha, uint8_t gamma, int8_t ta_idx, uint8_t ta_ts) |
| { |
| // Packet downlink assignment TS 44.060 11.2.7 |
| |
| uint8_t tn; |
| |
| 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 |
| block->SP = poll; // RRBP field is valid |
| block->USF = 0x0; // Uplink state flag |
| |
| block->u.Packet_Downlink_Assignment.MESSAGE_TYPE = 0x2; // Packet Downlink Assignment |
| block->u.Packet_Downlink_Assignment.PAGE_MODE = 0x0; // Normal Paging |
| |
| block->u.Packet_Downlink_Assignment.Exist_PERSISTENCE_LEVEL = 0x0; // PERSISTENCE_LEVEL: off |
| |
| block->u.Packet_Downlink_Assignment.ID.UnionType = 0x0; // TFI = on |
| block->u.Packet_Downlink_Assignment.ID.u.Global_TFI.UnionType = old_downlink; // 0=UPLINK TFI, 1=DL TFI |
| block->u.Packet_Downlink_Assignment.ID.u.Global_TFI.u.UPLINK_TFI = old_tfi; // TFI |
| |
| block->u.Packet_Downlink_Assignment.MAC_MODE = 0x0; // Dynamic Allocation |
| block->u.Packet_Downlink_Assignment.RLC_MODE = 0x0; // RLC acknowledged mode |
| block->u.Packet_Downlink_Assignment.CONTROL_ACK = tbf->was_releasing; // NW establishes no new DL TBF for the MS with running timer T3192 |
| block->u.Packet_Downlink_Assignment.TIMESLOT_ALLOCATION = 0; // timeslot(s) |
| for (tn = 0; tn < 8; tn++) { |
| if (tbf->pdch[tn]) |
| block->u.Packet_Downlink_Assignment.TIMESLOT_ALLOCATION |= 0x80 >> tn; // timeslot(s) |
| } |
| |
| block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.Exist_TIMING_ADVANCE_VALUE = 0x1; // TIMING_ADVANCE_VALUE = on |
| block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.TIMING_ADVANCE_VALUE = tbf->ta(); // TIMING_ADVANCE_VALUE |
| if (ta_idx < 0) { |
| block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.Exist_IndexAndtimeSlot = 0x0; // TIMING_ADVANCE_INDEX = off |
| } else { |
| block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.Exist_IndexAndtimeSlot = 0x1; // TIMING_ADVANCE_INDEX = on |
| block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.TIMING_ADVANCE_INDEX = ta_idx; // TIMING_ADVANCE_INDEX |
| block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.TIMING_ADVANCE_TIMESLOT_NUMBER = ta_ts; // TIMING_ADVANCE_TS |
| } |
| |
| block->u.Packet_Downlink_Assignment.Exist_P0_and_BTS_PWR_CTRL_MODE = 0x0; // POWER CONTROL = off |
| |
| block->u.Packet_Downlink_Assignment.Exist_Frequency_Parameters = 0x1; // Frequency Parameters = on |
| block->u.Packet_Downlink_Assignment.Frequency_Parameters.TSC = tbf->tsc(); // Training Sequence Code (TSC) |
| block->u.Packet_Downlink_Assignment.Frequency_Parameters.UnionType = 0x0; // ARFCN = on |
| block->u.Packet_Downlink_Assignment.Frequency_Parameters.u.ARFCN = tbf->trx->arfcn; // ARFCN |
| |
| block->u.Packet_Downlink_Assignment.Exist_DOWNLINK_TFI_ASSIGNMENT = 0x1; // DOWNLINK TFI ASSIGNMENT = on |
| block->u.Packet_Downlink_Assignment.DOWNLINK_TFI_ASSIGNMENT = tbf->tfi(); // TFI |
| |
| block->u.Packet_Downlink_Assignment.Exist_Power_Control_Parameters = 0x1; // Power Control Parameters = on |
| block->u.Packet_Downlink_Assignment.Power_Control_Parameters.ALPHA = alpha; // ALPHA |
| |
| for (tn = 0; tn < 8; tn++) |
| { |
| if (tbf->pdch[tn]) |
| { |
| block->u.Packet_Downlink_Assignment.Power_Control_Parameters.Slot[tn].Exist = 0x1; // Slot[i] = on |
| block->u.Packet_Downlink_Assignment.Power_Control_Parameters.Slot[tn].GAMMA_TN = gamma; // GAMMA_TN |
| } |
| else |
| { |
| block->u.Packet_Downlink_Assignment.Power_Control_Parameters.Slot[tn].Exist = 0x0; // Slot[i] = off |
| } |
| } |
| |
| block->u.Packet_Downlink_Assignment.Exist_TBF_Starting_Time = 0x0; // TBF Starting TIME = off |
| block->u.Packet_Downlink_Assignment.Exist_Measurement_Mapping = 0x0; // Measurement_Mapping = off |
| block->u.Packet_Downlink_Assignment.Exist_AdditionsR99 = 0x0; // AdditionsR99 = off |
| } |
| |
| /* generate paging request */ |
| int Encoding::write_paging_request(bitvec * dest, uint8_t *ptmsi, uint16_t ptmsi_len) |
| { |
| unsigned wp = 0; |
| int plen; |
| |
| bitvec_write_field(dest, wp,0x0,4); // Skip Indicator |
| bitvec_write_field(dest, wp,0x6,4); // Protocol Discriminator |
| bitvec_write_field(dest, wp,0x21,8); // Paging Request Message Type |
| |
| bitvec_write_field(dest, wp,0x0,4); // Page Mode |
| bitvec_write_field(dest, wp,0x0,4); // Channel Needed |
| |
| // Mobile Identity |
| bitvec_write_field(dest, wp,ptmsi_len+1,8); // Mobile Identity length |
| bitvec_write_field(dest, wp,0xf,4); // unused |
| bitvec_write_field(dest, wp,0x4,4); // PTMSI type |
| for (int i = 0; i < ptmsi_len; i++) |
| { |
| bitvec_write_field(dest, wp,ptmsi[i],8); // PTMSI |
| } |
| if ((wp % 8)) { |
| LOGP(DRLCMACUL, LOGL_ERROR, "Length of PAG.REQ without rest " |
| "octets is not multiple of 8 bits, PLEASE FIX!\n"); |
| exit (0); |
| } |
| plen = wp / 8; |
| bitvec_write_field(dest, wp,0x0,1); // "L" NLN(PCH) = off |
| bitvec_write_field(dest, wp,0x0,1); // "L" Priority1 = off |
| bitvec_write_field(dest, wp,0x1,1); // "L" Priority2 = off |
| bitvec_write_field(dest, wp,0x0,1); // "L" Group Call information = off |
| bitvec_write_field(dest, wp,0x0,1); // "H" Packet Page Indication 1 = packet paging procedure |
| bitvec_write_field(dest, wp,0x1,1); // "H" Packet Page Indication 2 = packet paging procedure |
| |
| return plen; |
| } |
| |
| /** |
| * The index of the array show_rbb is the bit position inside the rbb |
| * (show_rbb[63] relates to BSN ssn-1) |
| */ |
| void Encoding::encode_rbb(const char *show_rbb, uint8_t *rbb) |
| { |
| uint8_t rbb_byte = 0; |
| |
| // RECEIVE_BLOCK_BITMAP |
| for (int i = 0; i < 64; i++) { |
| /* Set bit at the appropriate position (see 3GPP TS 04.60 9.1.8.1) */ |
| if (show_rbb[i] == 'R') |
| rbb_byte |= 1<< (7-(i%8)); |
| |
| if((i%8) == 7) { |
| rbb[i/8] = rbb_byte; |
| rbb_byte = 0; |
| } |
| } |
| } |
| |
| /* generate uplink ack */ |
| void Encoding::write_packet_uplink_ack(struct gprs_rlcmac_bts *bts, |
| RlcMacDownlink_t * block, struct gprs_rlcmac_ul_tbf *tbf, |
| uint8_t final) |
| { |
| // Packet Uplink Ack/Nack TS 44.060 11.2.28 |
| |
| char rbb[65]; |
| |
| tbf->m_window.update_rbb(rbb); |
| |
| LOGP(DRLCMACUL, LOGL_DEBUG, "Encoding Ack/Nack for %s " |
| "(final=%d)\n", tbf_name(tbf), final); |
| |
| 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 |
| block->SP = final; // RRBP field is valid, if it is final ack |
| block->USF = 0x0; // Uplink state flag |
| |
| block->u.Packet_Uplink_Ack_Nack.MESSAGE_TYPE = 0x9; // Packet Downlink Assignment |
| block->u.Packet_Uplink_Ack_Nack.PAGE_MODE = 0x0; // Normal Paging |
| block->u.Packet_Uplink_Ack_Nack.UPLINK_TFI = tbf->tfi(); // Uplink TFI |
| |
| block->u.Packet_Uplink_Ack_Nack.UnionType = 0x0; // PU_AckNack_GPRS = on |
| block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.CHANNEL_CODING_COMMAND = tbf->current_cs() - 1; // CS1 |
| block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Ack_Nack_Description.FINAL_ACK_INDICATION = final; // FINAL ACK INDICATION |
| block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Ack_Nack_Description.STARTING_SEQUENCE_NUMBER = tbf->m_window.ssn(); // STARTING_SEQUENCE_NUMBER |
| |
| encode_rbb(rbb, block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Ack_Nack_Description.RECEIVED_BLOCK_BITMAP); |
| |
| /* rbb is not NULL terminated */ |
| rbb[64] = 0; |
| LOGP(DRLCMACUL, LOGL_DEBUG, "- V(N): \"%s\" R=Received " |
| "I=Invalid\n", rbb); |
| |
| block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.UnionType = 0x0; // Fixed Allocation Dummy = on |
| block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.u.FixedAllocationDummy = 0x0; // Fixed Allocation Dummy |
| block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Exist_AdditionsR99 = 0x0; // AdditionsR99 = off |
| |
| block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Common_Uplink_Ack_Nack_Data.Exist_CONTENTION_RESOLUTION_TLLI = 0x1; |
| block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Common_Uplink_Ack_Nack_Data.CONTENTION_RESOLUTION_TLLI = tbf->tlli(); |
| block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Common_Uplink_Ack_Nack_Data.Exist_Packet_Timing_Advance = 0x0; |
| block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Common_Uplink_Ack_Nack_Data.Exist_Extension_Bits = 0x0; |
| block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Common_Uplink_Ack_Nack_Data.Exist_Power_Control_Parameters = 0x0; |
| } |
| |
| unsigned Encoding::write_packet_paging_request(bitvec * dest) |
| { |
| unsigned wp = 0; |
| |
| bitvec_write_field(dest, wp,0x1,2); // Payload Type |
| bitvec_write_field(dest, wp,0x0,3); // No polling |
| bitvec_write_field(dest, wp,0x0,3); // Uplink state flag |
| bitvec_write_field(dest, wp,0x22,6); // MESSAGE TYPE |
| |
| bitvec_write_field(dest, wp,0x0,2); // Page Mode |
| |
| bitvec_write_field(dest, wp,0x0,1); // No PERSISTENCE_LEVEL |
| bitvec_write_field(dest, wp,0x0,1); // No NLN |
| |
| return wp; |
| } |
| |
| unsigned Encoding::write_repeated_page_info(bitvec * dest, unsigned& wp, uint8_t len, |
| uint8_t *identity, uint8_t chan_needed) |
| { |
| bitvec_write_field(dest, wp,0x1,1); // Repeated Page info exists |
| |
| bitvec_write_field(dest, wp,0x1,1); // RR connection paging |
| |
| if ((identity[0] & 0x07) == 4) { |
| bitvec_write_field(dest, wp,0x0,1); // TMSI |
| identity++; |
| len--; |
| } else { |
| bitvec_write_field(dest, wp,0x0,1); // MI |
| bitvec_write_field(dest, wp,len,4); // MI len |
| } |
| while (len) { |
| bitvec_write_field(dest, wp,*identity++,8); // MI data |
| len--; |
| } |
| bitvec_write_field(dest, wp,chan_needed,2); // CHANNEL_NEEDED |
| bitvec_write_field(dest, wp,0x0,1); // No eMLPP_PRIORITY |
| |
| return wp; |
| } |
| |