Contents
Foreword...................................................................................................................................................5
1 Scope......................................................................................................................................................6
2 References..............................................................................................................................................6
3 Definitions, symbols and abbreviations..................................................................................................6
3.1 Definitions..............................................................................................................................................................6
3.2 Symbols..................................................................................................................................................................7
3.3 Abbreviations.........................................................................................................................................................7
4 Background and Introduction.................................................................................................................7
5 Requirements.........................................................................................................................................7
6 Study Areas............................................................................................................................................8
6.1 Impacts on Iub Interface - General Aspects...........................................................................................................8
6.2 Impacts on Iub/Iur Control Plane Protocols.........................................................................................................10
6.2.1 HSDPA Signalling Requirements (Comparison between DSCH and HS-DSCH)...........................................10
6.2.2 Impacts on NBAP Procedures...........................................................................................................................12
6.2.2.1 Impacts on Dedicated NBAP Procedures and Message Contents.................................................................12
6.2.2.1.1 DSCH-related IEs in RNSAP......................................................................................................................13
6.2.2.1.2 Proposed HS-DSCH-related IEs for NBAP for Downlink Signalling........................................................14
6.2.2.1.3 Proposed HS-DSCH-related IEs for NBAP for Uplink Signalling.............................................................21
6.2.2.2 Impacts on Dedicated RNSAP Procedures and Message Contents...............................................................21
6.2.2.3 NBAP cell-level configuration handling........................................................................................................22
6.2.2.3.1 FDD 22
6.2.2.3.2 TDD 23
6.2.3 Example of HS-DSCH Configuration and Capacity Allocation.......................................................................25
6.2.4 Examples of HS-DSCH Mobility Procedures...................................................................................................27
6.2.4.1 Intra-Node B serving HS-DSCH cell change.................................................................................................27
6.2.4.2 Inter-Node B serving HS-DSCH cell change.................................................................................................28
6.2.4.3 Inter-Node B serving HS-DSCH cell change at hard handover.....................................................................30
6.2.4.4 Inter-Node B serving HS-DSCH cell change after radio link addition..........................................................34
6.2.5 Open Issues.......................................................................................................................................................35
6.3 Impacts on Iub Interface User Plane Protocols....................................................................................................36
6.3.1 Transport Bearer Options..................................................................................................................................36
6.3.1.1 Option 1 - One Transport Bearer per HS-DSCH Transport Channel............................................................36
6.3.1.1.1 Frame Protocol Aspects for HS-DSCH.......................................................................................................36
6.3.1.1.2 Data Frame Format for HS-DSCH Frame Protocol....................................................................................36
6.3.1.1.3 Control Frame Format for HS-DSCH Frame Protocol...............................................................................38
6.3.1.1.4 Open Issues.................................................................................................................................................39
6.3.1.2 Option 2 - One Transport Bearer for Multiple MAC-d flows for Multiple UE's...........................................39
6.3.1.2.1 Frame Protocol Aspects for HS-DSCH.......................................................................................................39
6.3.1.2.2 Data Frame Format for HS-DSCH Frame Protocol....................................................................................40
Description: Indicates the location where new IEs can in the future be added in a backward compatible
way...............................................................................................................................................43
Field length: 0-2 octets............................................................................................................................43
6.3.1.2.3 Control Frame Format for HS-DSCH Frame Protocol...............................................................................43
6.3.1.2.4 Open Issues.................................................................................................................................................43
6.3.1.3 Inter-operability of Options 1 and 2...............................................................................................................43
6.3.1.3.1 Signalling Flow Cases.................................................................................................................................44
6.3.2 Flow Control Options........................................................................................................................................46
6.3.2.1 Option 1 - Credit Based Flow Control...........................................................................................................46
6.3.2.1.1 HS-DSCH Data Transfer.............................................................................................................................46
6.3.2.1.2 HS-DSCH Capacity Request.......................................................................................................................47
6.3.2.1.3 HS-DSCH Capacity Allocation...................................................................................................................47
6.4 QoS Aspects.........................................................................................................................................................47
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