TR 25.899
High Speed Downlink Packet Access (HSDPA) enhancements
V6.1.0 (Wzip)
2004/09 68 p.
- Rapporteur:
- Mr. Fukui, Noriyuki
full Table of Contents for TR 25.899 Word version: 6.1.0
1 Scope Word‑p. 6
The present document is the technical report on HSDPA (High Speed Downlink Packet Access) Enhancements for Release 6 under the study item: "Radio link performance enhancement". This TR describes enhancement technologies proposed as candidates of the improvement on HSDPA physical layer. It reports system performance gain and/or other beneficial points for each proposal. It also reports the complexity and some points changed from Release 5 to easily understand the benefits of new technologies. Furthermore, the impacts on the specification in other than physical layer are clarified.
This activity involves the Radio Access work area of the 3GPP studies and has impacts both on the Mobile Equipment and Access Network of the 3GPP systems.
2 References Word‑p. 6
3 Definitions, symbols and abbreviations Word‑p. 6
4 Background and Introduction Word‑p. 6
5 Overview of Technologies considered as Enhancement Word‑p. 7
5.1 CQI Enhancement for FDD mode Word‑p. 7
5.1.1 Enhanced CQI Reporting Word‑p. 7
5.2 Dynamic Range Extension for the TDD CQI Report Word‑p. 7
5.3 Multiple Simultaneous Transmissions to a UE in an HSDPA Sub-frame Word‑p. 7
5.4 Code Reuse for Downlink HS-DSCH Word‑p. 8
5.5 Fast Signalling between Node-B and UE Word‑p. 8
5.6 Fast Adaptive Emphasis Word‑p. 8
5.7 ACK/NACK Transmit Power Reduction for HS-DPCCH with preamble and postamble Word‑p. 9
5.8 Fractional dedicated physical channel Word‑p. 9
5.9 HSDPA operation without an associated DPCH (TDD) Word‑p. 10
6 Details of Technologies Word‑p. 10
6.1 CQI Enhancement for FDD mode Word‑p. 10
6.1.1 Enhanced CQI Reporting Word‑p. 10
6.1.1.1 Features Word‑p. 10
6.1.1.2 Evaluation and Benefits Word‑p. 13
6.1.1.3 Impacts on other WGs Word‑p. 34
6.2 Dynamic Range Extension for the TDD CQI Report Word‑p. 34
6.2.1 Features Word‑p. 34
6.2.1.1 Use of unused CQI values Word‑p. 34
6.2.2 Evaluation and Benefits Word‑p. 34
6.3 Multiple Simultaneous Transmissions to a UE in an HSDPA Subframe Word‑p. 35
6.3.1 Features Word‑p. 35
6.3.2 Evaluation and Benefits Word‑p. 36
6.3.3 Impacts on other WGs Word‑p. 36
6.4 Code Reuse for Downlink HS-DSCH Word‑p. 36
6.4.1 Features Word‑p. 36
6.4.1.1 Partial Code Reuse Word‑p. 36
6.4.1.2 Full Code Reuse Word‑p. 37
6.4.2 Evaluation and Benefits Word‑p. 37
6.4.3 Impacts on other WGs Word‑p. 37
6.5 Fast Signalling between Node-B and UE Word‑p. 37
6.5.1 Features Word‑p. 37
6.5.2 Evaluation and Benefits Word‑p. 39
6.5.3 Impacts on other WGs Word‑p. 39
6.6 Fast Adaptive Emphasis Word‑p. 39
6.6.1 Features Word‑p. 39
6.6.2 Evaluation and Benefits Word‑p. 39
6.6.3 Impacts on other WGs Word‑p. 39
6.7 ACK/NACK Transmit Power Reduction for HS-DPCCH with preamble and postamble Word‑p. 39
6.7.1 Features Word‑p. 39
6.7.1.1 Summary of technology Word‑p. 39
6.7.1.2 Details of technology Word‑p. 40
6.7.2 Evaluation and Benefits Word‑p. 42
6.7.2.1 Simulation assumptions Word‑p. 42
6.7.2.2 Performance targets Word‑p. 42
6.7.2.3 Simulation Results Word‑p. 43
6.7.2.3.1 Soft Handover Word‑p. 43
6.7.2.3.2 Non Soft Handover Word‑p. 44
6.7.2.4 Summary Word‑p. 46
6.7.3 Impacts on other WGs Word‑p. 47
6.8 Fractional dedicated physical channel Word‑p. 47
6.8.1 Features Word‑p. 47
6.8.1.1 Rationale and high level description Word‑p. 47
6.8.1.2 F-DPCH slot structure Word‑p. 48
6.8.1.2.1 Option 1 : pilot position is unchanged, TPC bits are advanced in time Word‑p. 49
6.8.1.2.2 Option 2 : TPC position is unchanged, pilot bits are advanced in time Word‑p. 50
6.8.1.2.3 Option 3 : Same slot structure as DPCH Word‑p. 51
6.8.1.2.4 Option 4 : no pilot bits, TPC position unchanged Word‑p. 52
6.8.1.2.5 Option 5 : no pilot bits, TPC position moved to end of slot Word‑p. 52
6.8.1.3 Relationship with existing UTRAN features Word‑p. 53
6.8.1.3.1 Transmit diversity Word‑p. 54
6.8.1.3.1.1 General considerations Word‑p. 54
6.8.1.3.1.2 Compatibility with STTD Word‑p. 54
6.8.1.3.1.3 Compatibility with Closed loop mode 1 Word‑p. 54
6.8.1.3.2 Scrambling code mapping Word‑p. 54
6.8.1.3.3 Compressed mode Word‑p. 54
6.8.1.3.4 Beamforming Word‑p. 55
6.8.1.3.5 Power control Word‑p. 55
6.8.1.3.6 Soft handover Word‑p. 55
6.8.2 Evaluation and benefits Word‑p. 55
6.8.2.1 Gain in code tree consumption Word‑p. 55
6.8.3 Impact on other WGs Word‑p. 56
6.9 HSDPA operation without an associated DPCH (TDD) Word‑p. 56
6.9.1 Features Word‑p. 56
6.9.1.1 Operation without an associated DL DPCH Word‑p. 56
6.9.1.2 Operation without an associated UL DPCH Word‑p. 57
6.9.1.3 Operation without both the UL and DL associated DPCH's Word‑p. 57
6.9.2 Evaluation and Benefits Word‑p. 57
6.9.2.1 Operation without an associated DL DPCH Word‑p. 57
6.9.2.2 Operation without an associated UL DPCH Word‑p. 57
6.9.2.3 Operation without both the UL and DL associated DPCH's Word‑p. 57
6.9.3 Impacts on other WGs Word‑p. 57
7 Conclusion Word‑p. 59
$ Change history Word‑p. 60
