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8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.1.1 All Call | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.1.2 Dialling Plan | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.1.3 Talking Party ID | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.2 Base Station framing | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.3 Channel Access | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.3.1 OACSU | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.3.2 PTT Call | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.4 END frame | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.5 Message frame | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.5.1 Message Information field | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.6 Payload | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.6.1 Packet data | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.6.2 Short data | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.6.3 T1 data | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.6.4 T2 data | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.6.5 Voice | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.6.5.1 Voice and attached data | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.6.5.2 Late entry | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.6.5.3 Slow user data | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.7 Power save | ETSI ETSI TS 102 726-2 V2.1.1 (2011-06) 7 |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.8 Superframe | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.8.1 Traffic channel | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5.1.8.2 Voice TCH | |
8ccdc5dfecf88a70ecd307a1cea21977 | 102 726-2 | 5 Test Purposes (TP) | The test purposes have been written in the formal notation TPlan. Configurations that are referenced by test purposes are shown in annex A. TPLan user definitions are listed in annex B. 5.1 Framing TP id : TP_PMR_0401_01 summary : 'Payload frame length with voice data' RQ ref : RQ_001_0401 TP type : conformance Role : ... |
b1b496595995f51801af035afc8c4896 | 102 726-1 | 1 Scope | The present document provides the Protocol Implementation Conformance Statement (PICS) proforma for the ERM; Digital Private Mobile Radio using FDMA with a channel spacing of 6,25 kHz as defined in TS 102 658 [1] in compliance with the relevant requirements, and in accordance with the relevant guidance given in ISO/IEC... |
b1b496595995f51801af035afc8c4896 | 102 726-1 | 2 References | References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which ar... |
b1b496595995f51801af035afc8c4896 | 102 726-1 | 2.1 Normative references | The following referenced documents are necessary for the application of the present document. [1] ETSI TS 102 658 (V2.4.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM); Digital Private Mobile Radio (dPMR) using FDMA with a channel spacing of 6,25 kHz". [2] ISO/IEC 9646-1: "Information technology - O... |
b1b496595995f51801af035afc8c4896 | 102 726-1 | 2.2 Informative references | The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. Not applicable. ETSI ETSI TS 102 726-1 V2.2.1 (2014-09) 6 |
b1b496595995f51801af035afc8c4896 | 102 726-1 | 3 Definitions and abbreviations | |
b1b496595995f51801af035afc8c4896 | 102 726-1 | 3.1 Definitions | For the purposes of the present document, the terms and definitions given in TS 102 658 [1], ISO/IEC 9646-1 [2], ISO/IEC 9646-7 [3] and the following apply: Implementation Conformance Statement (ICS): statement made by the supplier of an implementation or system claimed to conform to a given specification, stating whic... |
b1b496595995f51801af035afc8c4896 | 102 726-1 | 3.2 Abbreviations | For the purposes of the present document, the following abbreviations apply: BS Base Station CC Channel Code CCL Call Control Layer dPMRTM digital Private Mobile Radio FDMA Frequency Division Multiple Access ICS Implementation Conformance Statement IP Internet Protocol IUT Implementation Under Test M1 Mode 1 MS M2 Mode... |
b1b496595995f51801af035afc8c4896 | 102 726-1 | 4 Conformance to this PICS proforma specification | If it claims to conform to the present document, the actual PICS proforma to be filled in by a supplier shall be technically equivalent to the text of the PICS proforma given in annex A, and shall preserve the numbering/naming and ordering of the proforma items. A PICS, which conforms to the present document, shall be ... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 1 Scope | The present document defines the Physical Layer of the Family SL Satellite Radio Interface between the Radio Network Subsystem (RNS) and the User Equipment (UE). |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 2 References | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 2.1 Normative references | References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which ar... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 2.2 Informative references | References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. NOTE: While any hyperlinks in... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 3 Symbols and abbreviations | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 3.1 Symbols | For the purposes of the present document, the symbols given in ETSI TS 102 744-1-4 [1], clause 3 apply. |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 3.2 Abbreviations | For the purposes of the present document, the abbreviations given in ETSI TS 102 744-1-4 [1], clause 3 apply. |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 4 Overview of physical layer | The physical layer is the layer which transfers an information bitstream over the satellite link, and includes the following: At a transmitter: • scrambling, encoding and interleaving blocks of data and conversion to a serial symbol stream; • modulation and filtering of a carrier at a specified frequency using the symb... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5 Forward bearers | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.1 Introduction | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.1.1 Forward bearer types | The forward bearers are capable of carrying nominal data rates in the range between 4,5 kbit/s and 858,0 kbit/s and are based upon the continuous transmission of Time-Division-Multiplexed (TDM) carriers. The forward bearer is transmitted with a constant mean power level. This clause describes the physical attributes of... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.1.2 L-Band Forward Frequency Range | The L-Band forward (downlink) frequency range used by the Family SL satellite radio interface is 1 518,000 MHz to 1 559,000 MHz. The forward frequency range is divided into a set of contiguous 200 kHz subbands. The nominal position of these subbands is aligned with the edges of the band, as illustrated in Figure 5.3. T... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.2 Modulation | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.2.1 Symbol rate | The symbol rate used depends on the type of forward bearer as shown in Table 5.2. Table 5.2: Forward Bearer Symbol Rates Bearer Type Identifier Symbol Rate (kBd) F80T0.25Q-1B 8,4 F80T1X-4B 33,6 F80T1Q-4B 33,6 FR80T2.5X4/16-5B 84,0 FR80T2.5X16-5B 84,0 FR80T2.5X32-6B 84,0 FR80T2.5X64-7B 84,0 F80T4.5X-8B 151,2 FR80T5X4/16... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.2.2 Modulation schemes | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.2.2.1 16-QAM (X/X16) bearers | The signal set and mapping for the 16-QAM modulation scheme are shown in Figure 5.4 and Table 5.3. Table 5.3 shows the mapping to the In-phase (I) and Quadrature (Q) components for a signal set with minimum distance D. Table 5.3 also shows the relationship between the binary data and the I and Q channels of the modulat... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.2.2.2 32-QAM (X32) bearers | The signal set and mapping for the 32-QAM modulation scheme are shown in Figure 5.5 and Table 5.4. Table 5.4 shows the mapping to the In-phase (I) and Quadrature (Q) components for a signal set with minimum distance D. Table 5.4 also shows the relationship between the binary data and the I and Q channels of the modulat... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.2.2.3 64-QAM (X64) bearers | The signal set and mapping for the 64-QAM modulation scheme are shown in Figure 5.6 and Table 5.5. Table 5.5 shows the mapping to the In-phase (I) and Quadrature (Q) components for a signal set with minimum distance D. The table also shows the relationship between the binary data and the I and Q channels of the modulat... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.2.2.4 QPSK (Q/X4) bearers | The signal set and mapping for the QPSK modulation scheme are shown in Figure 5.7 and Table 5.6. Table 5.6 shows the mapping to the In-phase (I) and Quadrature (Q) components for a signal set with minimum distance D. Table 5.6 also shows the relationship between the binary data and the I and Q channels of the modulator... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.2.2.5 Dynamic Modulation | In addition to different coding rates on an FEC block basis, the forward transmit channel units shall be able to dynamically change the modulation on an FEC block basis. Dynamic modulation shall be performed as directed by the Bearer Control Layer to adapt transmission to different UE types for the following forward be... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.2.3 Channel filtering | The forward channel modulator shall use a root-raised-cosine (RRC) filter function for symbol shaping. The demodulator shall use same RRC filter for matched filter reception. The filter function roll-off shall be 0,25 for all the bearers, except for the family of FR80T2.5 and FR80T5 bearers where the filter function ro... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3 Bearer types and frame formats | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.1 Frame numbering | On the forward link, the 80 ms frames are numbered using a 12 bit unsigned integer. After frame 4 095 the frame number wraps around to zero. The frame number is included in the Bulletin Board SDU (see ETSI TS 102 744-3-1 [3]), which is transmitted at regular intervals on each forward bearer. |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.2 Forward bearer parameters | Each of the main bearer types listed in clause 5.1 can support a range of bearer sub-types that correspond to different FEC coding rates as detailed in clause B.1. These different bearer sub-types are used for forward link adaptation to optimize the coding rate for the prevailing channel conditions. Refer to the Bearer... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.3 Forward channel frame formats | The frame format is based on a frame duration of 80 ms. The main frame parameters for each bearer type are listed in Table 5.10. Table 5.10: Frame Parameters for Forward Link Bearers Bearer Type Identifier (Note) Slot Duration (ms) Modulator Output Symbols (MOS) Start UW Symbols Pilot Symbols (PS) Data Symbols (DS) Tur... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.4 Unique words | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.4.0 General | Different Unique Words are used to signal the coding level being applied to the first FEC block in the 80 ms frame. The coding level of the subsequent blocks (if different from the one used in the first block) shall be signalled in a Bearer Control AVP (see ETSI TS 102 744-3-1 [3]). The Unique Words that shall be used ... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.4.1 QPSK (Q) bearers | The mapping of the Unique Words onto the QPSK symbols shall be as shown in Figure 5.16. Figure 5.16: QPSK Bearer Unique Word Symbol Mapping F80X/Q UW L8 E 4 5 6 4 A D A B D L7 B E D 8 B 3 E A D 2 L6 F 2 F 5 F 4 9 6 A 6 L5 C 9 1 1 3 6 4 2 8 A L4 F 9 A 4 2 B B 1 A B L3 D 4 E 3 5 7 2 9 9 C L2 4 C B 9 D 9 D 1 7 4 L1 6 A A ... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.4.2 X (F80T1X, F80T4.5X) Bearers | The mapping of the Unique Words onto the 16-QAM symbols for the F80T1X-4B and F80T4.5X-8B shall be as shown in Figure 5.17. Figure 5.17: 16-QAM (X) Bearer Unique Word Symbol Mapping |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.4.3 X4/16 (FR80T2.5X4/16-5B, FR80T5X4/16-9B) Bearers | The Unique Words for X4/16 bearers shall be as shown in Figure 5.18. Figure 5.18: X4/16 Bearer Unique Word Symbol Mapping (Relative to QPSK FEC block symbols) ETSI ETSI TS 102 744-2-1 V1.1.1 (2015-10) 24 The Unique Words for X4/16 bearers are shown relative to 16-QAM FEC blocks in Figure 5.19. Figure 5.19: X4/16 Bearer... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.4.4 X16 (FR80T2.5X16-5B, FR80T5X16-9B) Bearers | The Unique Words for X16 bearers shall be as shown in Figure 5.20. Figure 5.20: X16 Bearer Unique Word Symbol Mapping ETSI ETSI TS 102 744-2-1 V1.1.1 (2015-10) 25 |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.4.5 X32 (FR80T2.5X32-6B, FR80T5X32-11B) Bearers | The Unique Words for X32 bearers shall be as shown in Figure 5.21. Figure 5.21: X32 Bearer Unique Word Symbol Mapping ETSI ETSI TS 102 744-2-1 V1.1.1 (2015-10) 26 |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.4.6 X64 (FR80T2.5X64-7B, FR80T5X64-13B) Bearers | The Unique Words for X64 bearers shall be as shown in Figure 5.22. Figure 5.22: X64 Bearer Unique Word Symbol Mapping |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.5 Pilot symbols | To assist channel estimation of Es/No and help carrier and timing synchronization, pilot symbols (PSs) shall be inserted in the frame and are repeated at frequent intervals. For each bearer type, the total number of pilot symbols and the FEC symbols between successive pilot symbols were specified earlier in Table 5.10.... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.6 Empty block data | In the case where there is no data to be transmitted in a FEC-block, an All-zero data vector shall be transmitted. This all-zero data-vector shall be scrambled by the data scrambler defined in clause 5.3.7. The code-rate of the empty FEC-block shall follow the same rules as for FEC-blocks containing normal PDUs. |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.7 Scrambling | Scrambling is applied to all FEC blocks. The scrambler is initialized at the start of each FEC block. A pseudo-noise (PN) scrambler with a 15-stage shift register is used for scrambling before FEC encoding. The scrambler configuration is shown in Figure 5.23. The polynomial for the h-register of the scrambler is 1 + X ... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.8 Coding | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.8.0 General | Clauses 5.3.8.1 to 5.3.8.5 apply to all FEC blocks. |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.8.1 Turbo coding | The FEC coding used is Turbo coding. The turbo encoder consists of a buffer, an S-type interleaver, two identical 16-state Systematic Recursive Convolution Code (SRCC) encoders and a puncturer and is constructed as shown in Figure 5.24. The sizes of the buffer and the S-interleaver are identical and equal to the turbo ... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.8.2 SRCC encoder | The SRCC encoder is shown in Figure 5.25. Figure 5.25: SRCC Encoder The backward polynomial is 23 in octal, and the forward polynomial is 35 in octal: Backward Polynomial: 1 + X3 + X4 Forward Polynomial: 1 + X + X2 + X4 It is important to note that the two SRCC encoders are set to the zero state at the beginning of eac... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.8.3 S-Interleaver | The interleaving for the physical layer has been optimized for each forward bearer type and sub type. Therefore there are a large number of different interleaver matrices. The turbo code interleaver matrices for the forward bearers are defined in clause C.1. |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.8.4 Puncturing, Channel Interleaving and Symbol Mapping | Puncturing, channel interleaving and symbol mapping is different and optimized for each forward bearer type and sub type. Therefore there are a large number of different matrices. The puncturing, channel interleaving and symbol mappings for the forward bearers are defined in clause C.2. |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.3.8.5 80ms Outer Interleaver | In the case of FR80T2.5 and FR80T5 bearers, multiple FEC blocks per 80 ms frame are 'regularly' interleaved over the whole frame using an 'outer' interleaver. The term 'outer' is used here to emphasize that the process combines the encoded symbols into a frame before transmission and takes place after all FEC turbo and... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 5.4 PDU formats | PDUs on the forward link are grouped into a block structure of variable length depending on the bearer type and subtype being used. The block structure consists of a sequence of Forward Bearer Control PDUs (BCt-PDU) followed by padding with zeros, if required, to fill the rest of the FEC block, as defined below and in ... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6 Return bearers | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.1 Introduction | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.1.1 Return bearer types | The return bearers are capable of carrying nominal data rates in the range between 3,2 kbit/s and 848,0 kbit/s and are based upon two transmission strategies, burst and continuous using a Time-Division-Multiple Access Scheme (TDMA). Clause 6.3 describes the physical attributes of the return bearer types, and the genera... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.1.2 L-Band Return Frequency Range | The L-Band return (uplink) frequency ranges used by the satellite radio interface are 1 626,500 MHz to 1 660,500 MHz and 1 668,000 MHz to 1 675,000 MHz. The return frequency range is divided into a set of contiguous 200 kHz subbands. The nominal position of these subbands is aligned with the edges of the band, as illus... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.2 Modulation | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.2.1 Symbol rate | The symbol rate used depends on the type of return bearer as shown in Table 6.3. Table 6.3: Return Bearer Symbol Rates Bearer Type Identifier Symbol Rate (Bd) R20T0.5Q-1B R80T0.5Q-1B 16,8 R5T1X-1B, R20T1X-1B R20T1Q-1B, R80T1Q-1B 33,6 R5T2X-1B, R20T2X-1B R5T2Q-1B, R20T2Q-1B 67,2 FR80T2.5X4 / X16 / X32 / X64 84,0 R5T4.5X... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.2.2 Modulation schemes | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.2.2.1 16-QAM (X) Bearers | Return bearers R5/R20T1X, R5/R20T2X and R5/R20T4.5X use the same 16-QAM modulation scheme as the corresponding forward bearers (see clause 5.2.2). 6.2.2.2 π/4 QPSK Bearers A π/4 QPSK modulation scheme shall be used for the return bearers, instead of the QPSK modulation scheme used on the forward bearers The symbol mapp... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.2.2.3 FR80T2.5/T5 Bearers | FR80T2.5/T5 bearers in the return direction use the same modulation schemes as the corresponding forward bearers (see clause 5.2.2). |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.2.3 Channel filtering | The return channel filtering shall be identical to the forward channel filtering specified in clause 5.2.3. For return bearers with symbol rates of 33,6 kBd, 84,0 kBd, 151,2 kBd and 168,0 kBd, the frequency masks in Figures 5.8, 5.9, 5.10 and 5.11 respectively shall apply. For return bearers with symbol rates of 16,8 k... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.3 Bearer types and frame formats | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.3.1 Frame numbering | Unlike the forward frame number which is transmitted at regular intervals in the Bulletin Board Signalling Data Unit (see ETSI TS 102 744-3-1 [3]), a return frame number is not transmitted in any BCt-PDU but shall be maintained internally in both the UE and RNS for timing adjustment and ciphering purposes (see ETSI TS ... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.3.2 Return bearer parameters | Each of the main bearer types listed in clause 6.1 can support a range of bearer sub-types that correspond to different FEC coding rates as detailed in clause B.2. These different bearer sub-types are used for return link adaptation to optimize the coding rate for the prevailing channel conditions. Refer to the Bearer ... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.3.3 Return channel frame format | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.3.3.0 General | The return link frame format is based on frame duration of 80 ms for the case of continuous transmission and 5/20/80 ms duration for the case of burst format. The 80 ms frame format is same as forward link and has been specified in clause 5.3.3. The burst definitions for 5/20/80 ms slots are specified in the following ... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.3.3.1 5 ms Slot and Burst Definition | The 5 ms bursts are used to carry signalling information between the UE and RNS, and for short data bursts between applications, such as are used for acknowledgements or low bit rate voice codec frames. The 5 ms slots provide capacity for data from the upper layers between 19 octets and 275 octets (depending on the sel... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.3.3.2 20 ms Slot and Burst Definition | The 20 ms bursts are the principal data carrying burst between the UE and RNS. The 20 ms bursts are always transmitted in slots reserved for use by specific UEs that are in active communication with the RNS. The 20 ms slots provide capacity for data from the upper layers between 21 and 1 232 octets (depending on the se... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.3.3.3 80 ms Slot and Burst Definition | |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.3.3.3.0 General | The bearers R80T0.5Q-1B and R80T1Q-1B are designed to operate in high multiuser interference scenarios. The 80 ms slot format is shown in Figure 6.11. Figure 6.11: 80 ms Slot Format The slot is divided into two parts, the Preamble and the Data Subframe. The Preamble shall be a 79,52 ms carrier amplitude modulated (see ... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.3.3.3.1 R80T0.5Q-1B | 6.3.3.3.1.0 General The new R80T0.5Q-1B bearer employs 80 ms frame format which can be operated in two distinct modes: Random Access Mode and Continuous Access Mode. The motivation of introducing this bearer is to support new low coding rates ranging from 1/9 to 1/3 providing data rates in the range of 3 kbps to 9 kbps... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.3.3.3.2 R80T1Q-1B | 6.3.3.3.2.0 General The R80T1Q-1B bearer employs 80 ms frame format with the design being similar to R80T0.5Q-1B. The bearer subtypes are specified in clause B.2. 6.3.3.3.2.1 Random Access Mode The random access mode in case of R80T1Q-1B is similar to R80T0.5Q-1B. If a single burst is transmitted, then each UE shall ap... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.3.3.3.3 Preamble Generation | In the random access mode a single burst is transmitted from each UE with random power, timing and frequency in every slot. In the continuous mode at least one more additional burst is transmitted from the UE following the initial burst. In this case, there is no power, random, frequency and phase offset between the bu... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.3.3.3.4 CRC - R80 Bearers | A 16-bit long CRC is added at the end of each user data payload plus 4 flush bits for the first encoder. The CRC is included for detecting the data integrity at the physical layer and early termination of the FEC decoder. In terms of information flow, first the user data shall first be scrambled, and then followed by C... |
ea4404b75f8c7f57fc3dc60d3f4fc1b8 | 102 744-2-1 | 6.3.4 Distributed Unique Word Burst Format |
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