Content for TR 45.820 Word version: 13.1.0
6.3 Narrowband GSM (N-GSM)
6.3.1 General
6.3.2 Downlink Physical layer design
6.3.3 Uplink Physical layer design
6.3.4 Logical channel mapping
6.3.5 Link layer aspects
6.3.6 Radio resource management
6.3.7 Compatibility aspects
6.3.8 Concept evaluation
6.3.9 Impact to GSM/EDGE BTS hardware
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6.3 Narrowband GSM (N-GSM) p. 132
6.3.1 General p. 132
6.3.2 Downlink Physical layer design p. 133
6.3.2.1 Narrowing signal bandwidth with pre-coding p. 133
6.3.2.2 Logical channels for N-GSM p. 133
6.3.2.3 Burst formats p. 133
6.3.2.3.1 General p. 133
6.3.2.3.2 Burst format for Narrowband Normal Burst (N-NB) p. 134
6.3.2.3.3 Burst format for Narrowband Synchronization Burst (N-SB) p. 134
6.3.2.4 Training sequences p. 134
6.3.2.5 Channel encoding p. 135
6.3.2.5.1 N-SCH p. 135
6.3.2.5.2 N-BCCH p. 135
6.3.2.5.3 N-PCH p. 136
6.3.2.5.4 N-AGCH p. 136
6.3.2.5.5 N-PDTCH p. 136
6.3.2.5.6 N-PACCH p. 138
6.3.2.5.7 N-MAC/D p. 138
6.3.2.5.8 N-PCH Header p. 138
6.3.2.5.9 Summary of Downlink Coding Schemes p. 138
6.3.2.5.10 Interleaving p. 139
6.3.2.6 Physical layer procedures p. 139
6.3.2.6.1 Cell Synchronization p. 139
6.3.2.6.2 Link Adaptation p. 140
6.3.2.6.3 Power Control p. 140
6.3.2.6.4 Physical layer measurements p. 140
6.3.3 Uplink Physical layer design p. 140
6.3.3.1 Narrowing signal bandwidth with pre-coding p. 140
6.3.3.2 Logical channels for N-GSM p. 140
6.3.3.3 Burst formats p. 141
6.3.3.3.0 General p. 141
6.3.3.3.1 Burst format for Narrowband Normal Burst (N-NB) p. 141
6.3.3.3.2 Burst format for Narrowband Access Burst (N-AB) p. 141
6.3.3.4 Training Sequences p. 141
6.3.3.5 Channel encoding p. 142
6.3.3.5.0 General p. 142
6.3.3.5.1 N-RACH p. 142
6.3.3.5.2 N-PDTCH p. 142
6.3.3.5.3 N-PACCH p. 142
6.3.3.5.4 N-MAC/U p. 142
6.3.3.5.5 Summary of Uplink Coding Schemes p. 143
6.3.3.6 Physical Layer procedures p. 143
6.3.3.6.1 Random Access p. 143
6.3.3.6.2 Spacing between repetitions p. 144
6.3.3.6.3 Link Adaptation p. 144
6.3.3.6.4 Timing Advance p. 145
6.3.3.6.5 Physical Layer Measurements p. 145
6.3.3.6.6 Power Control p. 145
6.3.3.6.7 Uplink scheduling p. 145
6.3.4 Logical channel mapping p. 145
6.3.4.1 N-SCH p. 145
6.3.4.2 N-BCCH p. 146
6.3.4.3 N-PCH p. 146
6.3.4.4 N-AGCH p. 146
6.3.4.5 N-RACH p. 146
6.3.4.6 N-PDTCH p. 147
6.3.4.7 N-PACCH p. 147
6.3.4.8 Mapping table p. 147
6.3.5 Link layer aspects p. 147
6.3.5.1 Multiplexing and Demultiplexing Principles p. 147
6.3.5.2 Adaptive Repetitions p. 148
6.3.5.3 Paging Channel Operation p. 148
6.3.5.4 Random Access Procedure p. 148
6.3.6 Radio resource management p. 149
6.3.6.1 System Information p. 149
6.3.7 Compatibility aspects p. 150
6.3.7.1 Performance Impact to / from legacy GPRS users p. 150
6.3.7.1.1 Simulation Assumptions p. 150
6.3.7.1.2 Impact to GPRS user from N-GSM interferer p. 151
6.3.7.1.3 Impact to N-GSM user from GPRS interferer p. 155
6.3.7.2 Spectral Properties p. 155
6.3.7.2.1 Modulation Spectrum p. 155
6.3.7.2.2 TX Intermodulation Spectrum p. 156
6.3.7.2.3 Summary p. 158
6.3.8 Concept evaluation p. 158
6.3.8.1 Training Sequence Design p. 158
6.3.8.1.1 N-SCH p. 158
6.3.8.1.2 N-RACH p. 158
6.3.8.2 Network Synchronization p. 159
6.3.8.2.1 Evaluation Methodology p. 159
6.3.8.2.2 Simulation Assumptions p. 159
6.3.8.2.3 Sensitivity p. 160
6.3.8.2.4 Synchronization Time p. 160
6.3.8.3 System Information Acquisition p. 162
6.3.8.3.1 Simulation Assumptions p. 162
6.3.8.3.2 Simulation Results p. 163
6.3.8.4 Random Access p. 163
6.3.8.5 Data Traffic Channel p. 163
6.3.8.6 Coverage improvement target using MCL methodology p. 163
6.3.8.6.1 Assumptions p. 163
6.3.8.6.2 Results for delay and throughput for uplink traffic channel p. 164
6.3.8.6.3 Coverage Improvement Summarysummarizes p. 165
6.3.8.7 Latency Analysis p. 166
6.3.8.8 Battery Lifetime Estimation p. 169
6.3.9 Impact to GSM/EDGE BTS hardware p. 169
6.3.9.1 BTS Transmitter p. 169
6.3.9.1.1 Precoding p. 169
6.3.9.1.2 Impact due to spectral properties of the N-GSM waveform p. 169
6.3.9.1.3 N-MAC Header for adaptive chase combining p. 170
6.3.9.1.4 Coding schemes for N-GSM p. 170
6.3.9.1.5 Synchronization channel for N-GSM p. 170
6.3.9.1.6 Synchronization channel for N-GSM p. 170
6.3.9.1.7 Impact to Transmitter Power Budget p. 170
6.3.9.1.8 Transmitter - Summary p. 170
6.3.9.2 BTS Receiver p. 170
6.3.9.2.1 Equalizer changes p. 171
6.3.9.2.2 Extended TTI p. 171
6.3.9.2.3 Impacts from Fixed / Adaptive chase combining p. 171
6.3.9.2.4 N-RACH burst format changes p. 172
6.3.9.2.5 N-RACH repetitions and chase combining p. 172
6.3.9.2.6 Receiver - Summary p. 173
6.3.9.3 Conclusion p. 173
