Content for TS 26.267 Word version: 18.0.0
2 References
3 Definitions and abbreviations
3.1 Definitions
3.2 Abbreviations
4 General overview
4.1 eCall system overview
4.2 eCall system requirements
4.3 eCall in-band modem architecture
5 Functional description of the IVS data modem
5.1 IVS transmitter
5.2 IVS receiver
6 Functional description of the PSAP data modem
6.1 PSAP transmitter
6.2 PSAP receiver
7 Transmission protocol and error handling
7.1 Normal operation
7.2 Abnormal operation
7.3 PSAP and IVS protocol state models
A eCall Performance Requirements/Objectives and Design Constraints
A.1 Definitions
A.2 Performance Requirements
A.3 Performance Objectives
A.4 Design Constraints
$ Change history
2 References p. 6
3 Definitions and abbreviations p. 7
3.1 Definitions p. 7
3.2 Abbreviations p. 7
4 General overview p. 8
4.1 eCall system overview p. 8
4.2 eCall system requirements p. 9
4.3 eCall in-band modem architecture p. 10
5 Functional description of the IVS data modem p. 12
5.1 IVS transmitter p. 12
5.1.1 MSD Message p. 12
5.1.2 CRC code p. 13
5.1.3 HARQ FEC encoder p. 13
5.1.4 Modulation p. 15
5.1.5 MSD data frame format p. 16
5.1.6 Synchronization signal and frame format p. 16
5.1.7 Multiplexing p. 17
5.1.8 Uplink signal and retransmission p. 18
5.1.9 Additional signal format for push mode p. 18
5.2 IVS receiver p. 18
6 Functional description of the PSAP data modem p. 21
6.1 PSAP transmitter p. 21
6.1.1 Message encoding p. 21
6.1.2 BCH encoding p. 21
6.1.3 Modulation p. 22
6.1.4 Downlink signal p. 22
6.1.4.1 Link-layer feedback messages p. 22
6.1.4.2 Higher-layer acknowledgement messages p. 23
6.1.4.3 Handling of downlink messages p. 23
6.1.5 Synchronization p. 23
6.1.6 Multiplexing p. 24
6.2 PSAP receiver p. 24
6.2.1 Synchronization detector/tracker p. 24
6.2.2 Timing Unit p. 24
6.2.3 De-multiplexer p. 25
6.2.4 Data demodulator p. 25
6.2.5 HARQ FEC decoder p. 25
6.2.6 CRC handling p. 25
6.2.7 Push mode - push message detector p. 25
7 Transmission protocol and error handling p. 26
7.1 Normal operation p. 26
7.2 Abnormal operation p. 26
7.3 PSAP and IVS protocol state models p. 29
A eCall Performance Requirements/Objectives and Design Constraints p. 32
A.1 Definitions p. 32
A.2 Performance Requirements p. 32
A.3 Performance Objectives p. 34
A.4 Design Constraints p. 35
$ Change history p. 36
