Content for TR 25.903 Word version: 16.0.0
2 References
3 Definitions, symbols and abbreviations
3.1 Definitions
3.2 Symbols
3.3 Abbreviations
4 Technical concepts
4.1 New DPCCH slot format
4.2 Uplink DPCCH gating
4.3 SIR_target reduction
4.4 CQI reporting reduction
4.5 DRX at the UE
4.6 Restricted HS-SCCH
4.7 HS-SCCH-less operation
4.8 Reduced complexity HS-SCCH-less operation
4.A Summary of technical concepts and possible combinations
5 Technical solution
$ Change history
2 References
3 Definitions, symbols and abbreviations Word‑p. 8
4 Technical concepts Word‑p. 9
4.1 New DPCCH slot format Word‑p. 10
4.1.1 Description of the concept
4.1.2 Analysis of the concept Word‑p. 14
4.1.2.1 Simulation results on UL TPC error rate
4.1.2.2 Simulation results on other UL channels Word‑p. 17
4.1.2.2.1 CQI transmission Word‑p. 19
4.1.2.2.2 HARQ-ACK transmission Word‑p. 26
4.1.2.2.3 Observations from simulations of HS-DPCCH performance in sub-clauses 4.1.2.2.1 and 4.1.2.2.2 Word‑p. 31
4.1.2.3 Conclusions from TPC performance (sub-clause 4.1.2.1) and HS-DPCCH performance (sub-clause 4.1.2.2) Word‑p. 32
4.1.2.4 Power control delay
4.1.3 Benefits of the concept Word‑p. 33
4.1.4 Open issues of the concept
4.2 Uplink DPCCH gating
4.2.1 Description of the concept
4.2.1.1 General principle Word‑p. 34
4.2.1.2 Basic packet traffic example
4.2.1.3 VoIP traffic example
4.2.1.4 Operation of the uplink DPCCH gating Word‑p. 35
4.2.2 Analysis of the concept Word‑p. 37
4.2.2.1 Power control stability
4.2.2.2 F-DPCH performance Word‑p. 40
4.2.2.3 Uplink link performance Word‑p. 44
4.2.2.3.1 Additional link level results Word‑p. 46
4.2.2.3.2 Link level results for CQI decoding and for large TB sizes Word‑p. 54
4.2.2.3.3 Preamble detection link level result for uplink DPCCH gating with long gating gap Word‑p. 60
4.2.2.4 System performance Word‑p. 62
4.2.2.4.1 Simulation assumptions
4.2.2.4.2 VoIP results with and without gating - 2 ms TTI
4.2.2.4.3 VoIP results with and without gating - 10 ms TTI and packet bundling Word‑p. 64
4.2.2.4.4 VoIP results - Summary Word‑p. 66
4.2.2.4.5 Impact of inactive users to cell throughput
4.2.2.4.6 System-level performance with high-velocity UEs Word‑p. 68
4.2.2.5 UE battery saving calculations Word‑p. 70
4.2.3 Benefits of the concept Word‑p. 73
4.2.4 Open issues of the concept
4.3 SIR_target reduction
4.3.1 Description of the concept
4.3.1.1 L1 signalling approach
4.3.1.2 L2 signalling approach Word‑p. 76
4.3.1.3 Approach with predefined/configured rules
4.3.2 Analysis of the concept Word‑p. 78
4.3.2.1 Simulation of the concept
4.3.2.2 Noise rise caused by UL DPCCH Word‑p. 81
4.3.2.3 Potential gain in terms of number of additional users & UL noise rise Word‑p. 82
4.3.2.4 Reactivation delay Word‑p. 83
4.3.2.5 Signalling load
4.3.2.6 CQI Performance for boosting HS-DPCCH power offset to DPCCH
4.3.3 Benefits of the concept Word‑p. 85
4.3.4 Open issues of the concept Word‑p. 86
4.4 CQI reporting reduction
4.4.1 Description of the concept
4.4.1.1 L1 signalling approach for CQI off
4.4.1.1.1 Interworking aspects Word‑p. 87
4.4.1.2 L2 signalling approach for CQI off
4.4.1.3 Predefined/configured rules for CQI reporting reduction
4.4.2 Analysis of the concept Word‑p. 89
4.4.3 Benefits of the concept
4.4.4 Open issues of the concept Word‑p. 90
4.5 DRX at the UE
4.5.1 Description of the concept
4.5.2 Analysis of the concept
4.5.2.1 Timing, with 2 ms E-DCH TTI
4.5.2.1.1 Background
4.5.2.1.2 DRX mode 2/8 Word‑p. 91
4.5.2.1.3 DRX mode 1/8 Word‑p. 92
4.5.2.1.4 DRX mode 1/16 and beyond Word‑p. 93
4.5.2.1.5 DRX mode 2/8, in a 2 way soft handover
4.5.2.1.6 DRX mode 1/8, in a 2 way soft handover Word‑p. 94
4.5.2.1.7 DRX mode 1/16, in a 2 way soft handover
4.5.2.2 Downlink scheduler performance Word‑p. 95
4.5.2.2A Timing, with 10 ms E-DCH TTI Word‑p. 96
4.5.2.2A.1 Background
4.5.2.2A.2 DRX mode 1/2 Word‑p. 97
4.5.2.2A.3 DRX mode 1/3
4.5.2.2A.4 DRX mode 1/4
4.5.2.2A.5 DRX mode 1/4, in a 2 way soft handover Word‑p. 98
4.5.2.3 Impact of DRX in demodulation performance Word‑p. 99
4.5.3 Benefits of the concept Word‑p. 102
4.5.4 Open issues of the concept
4.6 Restricted HS-SCCH
4.6.1 Description of the concept
4.6.1.1 HARQ Operation and Signalling Word‑p. 103
4.6.1.2 Signalling of transport format
4.6.1.3 Coding for HS-SCCH Word‑p. 104
4.6.1.4 HS-SCCH physical channel structure Word‑p. 105
4.6.1.5 UE reception of the restricted HS-SCCH Word‑p. 106
4.6.2 Analysis of the concept
4.6.3 Benefits of the concept Word‑p. 107
4.6.4 Open issues of the concept
4.7 HS-SCCH-less operation
4.7.1 Description of the Concept
4.7.2 Analysis of the concept Word‑p. 109
4.7.2.1 Transmission waveform and timing
4.7.2.2 UE complexity discussion Word‑p. 110
4.7.2.3 CRC discussion Word‑p. 111
4.7.2.4 VoIP and best effort capacity simulations Word‑p. 112
4.7.3 Benefits of the concept Word‑p. 115
4.7.4 Open issues of the concept
4.8 Reduced complexity HS-SCCH-less operation
4.8.1 Description of the concept
4.8.2 Analysis of the concept Word‑p. 117
4.8.2.1 Timing and operation
4.8.2.2 UE Complexity discussion
4.8.2.3 Simulation Results
4.8.2.3.1 Simulation assumptions Word‑p. 121
4.8.3 Benefits of the concept Word‑p. 122
4.8.4 Open Issues of the concept
4.A Summary of technical concepts and possible combinations Word‑p. 123
5 Technical solution Word‑p. 130
5.1 Overview of the selected solution
5.1.1 New UL DPCCH slot format Word‑p. 131
5.1.2 Discontinuous transmission and reception in CELL_DCH
5.1.3 HS-SCCH less operation Word‑p. 133
5.2 Impact on RAN1 specifications Word‑p. 134
5.3 Impact on RAN2 specifications Word‑p. 135
5.4 Impact on RAN3 specifications Word‑p. 136
5.5 Impact on RAN4 specifications Word‑p. 138
5.6 Change requests related to CPC
$ Change history Word‑p. 140
