16.7.1 Conformance Test Aspects – 64qam for 1.28 Mcps tdd hsdpa uid_400057

UID	Name	Resource	Hyperlink	Status_Report	TS_TR
400057	Conformance Test Aspects – 64QAM for 1.28 Mcps TDD HSDPA	R5	RP-080334	RP-090415	34.108, 34.122, 34.123-1, 34.123-2, 34.123-3

16.8 Enhanced cell_fach state in 1.28 Mcps tdd uid_380076

Resources: R2

References

Document	Title/Contents
WID(s)
RP-071038	WID on Enhanced CELL_FACH state in 1.28 Mcps TDD
Impacted Specifications
TS 25.123	Requirements for support of radio resource management (TDD)
TS 25.221	Physical channels and mapping of transport channels onto physical channels (TDD)
TS 25.222	Multiplexing and channel coding (TDD)
TS 25.224	Physical Layer Procedures
TS 25.301	Radio interface protocol architecture
TS 25.302	Services provided by the physical layer
TS 25.304	User Equipment (UE) procedures in idle mode and procedures for cell reselection in connected mode
TS 25.306	UE Radio Access capabilities
TS 25.308	High Speed Downlink Packet Access (HSDPA); Overall description; Stage 2
TS 25.321	Medium Access Control (MAC) protocol specification
TS 25.331	Radio Resource Control (RRC); Protocol specification
TS 25.423	UTRAN Iur interface Radio Network Subsystem Application(RNSAP) signalling
TS 25.425	UTRAN Iur interface user plane protocols for Common Transport Channel data streams
TS 25.433	UTRAN Iub interface Node B Application Part (NBAP) signalling
TS 25.435	UTRAN Iub interface use plane protocols for Common Transport Channel data streams
New Dedicated Specifications/Reports
-	-

Supporting Individual Members: ZTE, RITT, CATT, TD-TECH, Spreadtrum Communications.

UID	Name	Resource	Hyperlink	Status_Report	TS_TR
380076	Enhanced CELL_FACH state in 1.28 Mcps TDD	R2	RP-071038	RP-080807	25.123, 25.221, 25.222, 25.224, 25.301, 25.302, 25.304, 25.306, 25.308, 25.319, 25.321, 25.331, 25.401, 25.423, 25.425, 25.433, 25.435

This work is linked to:

• Scope of future HSPA Evolution for 1.28Mcps TDD

• Improved L2 for uplink

• Enhanced CELL_FACH state in FDD

• Enhanced Uplink for CELL_FACH State in FDD

• Improved L2 support for high data rates

Rel-8 Study TR 25.824 (Scope of High Speed Packet Access (HSPA) Evolution for 1.28 Mcps TDD) focused on improving the capability and performance of HSPA-based radio networks. Enhancing CELL_FACH state was one of the subjects investigated during this study.

Delay in set up or channel allocation is one important measure of Quality of Service experienced by the subscriber. TR 25.815 shows that the setup delays on PS and CS domain can be significantly reduced by using HSPA for SRBs. Thus, signalling latency when SRBs are mapped on HSPA can meet the target requirements of Rel-7.

In current CELL_FACH state in 1.28Mcps TDD, the signalling delay on FACH and RACH can be seen as one bottle neck compared to signalling speed on HSPA. This can be identified by some "always on" type IMS services, where the UE is typically kept in CELL/URA_PCH state and normally moved to CELL_DCH when DL/UL user plane is activated. The enhancement on signalling bit rates in CELL_FACH state can reduce the signalling delay experienced by the RRC messages when transiting to CELL_DCH.

This work improves the CELL_FACH state by:

• increasing the available peak rate for UEs in CELL_FACH state by utilising HSPA in CELL_FACH state

• reducing the latency of user and control plane in the CELL_FACH, CELL_PCH and URA_PCH state by higher data peak rate

• reducing state transition delay from CELL_FACH, CELL_PCH and URA_PCH state to CELL_DCH state

• allowing lower UE power consumption in CELL_FACH state by discontinuous reception

Complexity and backward compatibility were considered.