Content for TS 25.319 Word version: 18.0.0

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3.1 Definitions 3.2 Abbreviations
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1 Scope p. 7

The present document is a technical specification of the overall support of FDD, TDD Enhanced Uplink in UTRA.

2 References p. 7

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.

References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.

[1]

TR 25.896: "Feasibility Study for Enhanced Uplink for UTRA FDD".

[2]

TR 21.905: "Vocabulary for 3GPP Specifications".

[3]

TS 25.214: "Physical layer procedures (FDD)".

[4]

TS 25.321: "Medium Access Control (MAC) protocol specification".

[5]

TS 25.427: "UTRAN Iub/Iur interface user plane protocol for DCH data streams"

[6]

TS 25.212: "Multiplexing and channel coding (FDD)".

[7]

TS 25.215: "Physical layer - Measurements (FDD)".

[8]

TS 25.306: "UE Radio Access capabilities".

[9]

TR 25.804: "Feasibility Study on Uplink Enhancements for UTRA TDD"

[10]

TR 25.224: "Physical layer procedures (TDD)"

[11]

TS 25.225: "Physical layer - Measurements (TDD)"

[12]

TR 25.826: "3.84 Mcps TDD Enhanced Uplink: Physical Layer Aspects"

[13]

TS 25.221: "Physical Channels and Mapping of Transport Channels onto Physical Channeals (TDD)"

[14]

TR 25.827: "1.28 Mcps TDD Enhanced Uplink: Physical Layer Aspects"

[15]

TS 25.222: "Multiplexing and channel coding (TDD)".

[16]

TS 25.308: "High Speed Downlink Packet Access (HSDPA); Overall description; Stage 2".

[17]

TS 25.433: "UTRAN Iub interface Node B Application Part (NBAP) signalling".

3 Definitions and abbreviations p. 8

3.1 Definitions p. 8

For the purposes of the present document, the terms and definitions given in TR 21.905 and the following apply:

3.1.1 General p. 8

E-DCH:

Enhanced DCH, a new dedicated and common (FDD and 1.28Mcps TDD only) transport channel type or enhancements to an existing dedicated and common (FDD and 1.28Mcps TDD only) transport channel type.

HARQ profile:

One HARQ profile consists of a power offset attribute and maximum number of transmissions.

Power offset attribute (FDD):

Represents the power offset between E-DPDCH(s) and reference E-DPDCH power level for a given E-TFC. This power offset attribute is set to achieve the required QoS in this MAC-d flow when carried alone in a MAC-e PDU and subsequently in the corresponding CCTrCh of E-DCH type. Details on the mapping on Beta factors can be found in [3]. The reference E-DPDCH power offset is signaled to the UE for one (or several) reference E-TFC(s) (see details in subclause 11.1).

Power offset attribute (TDD):

The power offset attribute is set to achieve the required QoS in this MAC-d flow when carried alone in a MAC-e PDU and subsequently in the corresponding CCTrCh of E-DCH type.

Primary Absolute Grant:

Absolute Grant received with the primary E-RNTI. Note that the primary E-RNTI is the only E-RNTI for TDD.

Serving E-DCH cell:

Cell from which the UE receives Absolute Grants from the Node-B scheduler. A UE has one Serving E-DCH cell.

3.1.2 FDD p. 8

Active Process:

HARQ process for which Scheduling Grants are applicable, i.e. scheduled data can be sent.

Data Description Indicator (DDI):

MAC-e header field used to identify the logical channel, MAC-d flow and the size of the MAC-d PDUs concatenated into a MAC-es PDU.

E-DCH:

Enhanced DCH, a new dedicated and common (FDD only) transport channel type or enhancements to an existing dedicated and common (FDD only) transport channel type.

E-DCH active set:

The set of cells which carry the E-DCH for one UE. In CELL_FACH state and Idle mode, the E-DCH active set contains the serving E-DCH cell only.

Enhanced Uplink in CELL_FACH and Idle mode:

combines the Rel99 random access power ramping phase with E-DCH transmission. The procedure can be started in idle mode and CELL_FACH state.

E-DCH MAC-d flow:

MAC-es/MAC-is PDUs, carrying MAC-d and MAC-c (FDD only) data sharing the same traffic characteristics, and that can be multiplexed with MAC-es/MAC-is PDUs of same or other MAC-d flows on MAC-e/MAC-i.

HARQ profile:

One HARQ profile consists of a power offset attribute and maximum number of transmissions.

Implicit Grant handling:

A scheduling scheme where a UE's Scheduling Grant on the Secondary Serving E-DCH cell may be revoked by means of an Absolute Grant addressed to another UE.

Inactive Process:

HARQ process for which Scheduling Grants are not applicable, i.e. scheduled data cannot be sent.

INACTIVE:

Absolute Grant value in CELL_DCH that can be sent by the serving cell's scheduler on the E-AGCH to deactivate a process or to switch the UE to its secondary E-RNTI. Absolute Grant value in CELL_FACH (FDD only) that can be sent by the serving cell's scheduler on the E-AGCH to release a common E-DCH resource.

Power offset attribute:

Primary Absolute Grant:

Absolute Grant received with the primary E-RNTI.

Secondary Absolute Grant:

Absolute Grant received with the secondary E-RNTI.

Secondary E-DCH Active Set:

The set of cells on the secondary downlink frequency where E-DCH is carried for one UE. Only radio links for which an E-HICH configuration is stored are considered part of the secondary E-DCH active set.

Secondary Serving E-DCH cell:

Cell from which the UE receives Absolute Grants from the Node-B scheduler on the secondary downlink frequency. A UE has one Serving E-DCH cell on the secondary uplink frequency.

Secondary Serving E-DCH RLS or Secondary Serving RLS:

In Dual Cell E-DCH operation, the set of cells which contains at least the Secondary Serving E-DCH cell and from which the UE can receive and combine one Relative Grant. A UE can have zero or one Secondary Serving E-DCH RLS.

Secondary Non-serving E-DCH RL or Secondary Non-serving RL:

In Dual Cell E-DCH operation, the cell which belongs to the Secondary E-DCH active set but does not belong to the Secondary Serving E-DCH RLS and from which the UE in CELL_DCH can receive one Relative Grant. The UE can have zero, one or several Secondary Non-serving E-DCH RL(s).

Activated uplink frequency:

For a specific UE, an uplink frequency is said to be activated if the UE is allowed to transmit on that frequency. The primary uplink frequency is always activated when configured while a secondary uplink frequency can be activated and de-activated by means of an HS-SCCH order.

Configured uplink frequency:

For a specific UE, an uplink frequency is said to be configured if the UE has received all relevant information from higher layers in order to perform transmission on that frequency.

Primary uplink frequency:

If a single uplink frequency is configured for the UE, then it is the primary uplink frequency. In case more than one uplink frequencies are configured for the UE, then the primary uplink frequency is the frequency on which the E-DCH corresponding to the serving E-DCH cell associated with the serving HS-DSCH cell is transmitted. The association between a pair of uplink and downlink frequencies is indicated by higher layers.

Secondary uplink frequency:

A secondary uplink frequency is a frequency on which an E-DCH corresponding to a serving E-DCH cell associated with a secondary serving HS-DSCH cell is transmitted. The association between a pair of uplink and downlink frequencies is indicated by higher layers.

Serving E-DCH RLS or Serving RLS:

Set of cells which contains at least the Serving E-DCH cell and from which the UE can receive and combine one Relative Grant. The UE has only one Serving E-DCH RLS. In CELL_FACH state and Idle mode, the Serving E-DCH RLS or Serving RLS contains the Serving E-DCH cell only, from which the UE can receive the Relative Grant.

Non-serving E-DCH RL or Non-serving RL:

Cell which belongs to the E-DCH active set but does not belong to the Serving E-DCH RLS and from which the UE in CELL_DCH can receive one Relative Grant. The UE can have zero, one or several Non-serving E-DCH RL(s).

Common E-DCH resource:

Common E-DCH resources are under direct control of the Node B and are shared by UEs in CELL_FACH and IDLE mode. The RNC is not involved in the assignment of these resources to UEs. Since only one cell is involved in the resource allocation, soft handover is not possible.

Serving E-DCH cell decoupling (FDD only):

An E-DCH operation mode in which the Serving HS-DSCH cell and the Serving E-DCH cell are different.

Radio links without DPCH/F-DPCH (FDD only):

An operation mode in which UE supports to not receive both DPCH and F-DPCH downlink channels from the indicated Non-serving E-DCH cell(s).

3.1.3 TDD p. 10

Enhanced Uplink in CELL_FACH and Idle mode (1.28Mcps TDD only):

in 1.28Mcps TDD, the REL7 enhanced random access procedure for E-DCH is used in idle mode and CELL_FACH state.

Common E-DCH resource (1.28Mcps TDD only):

common E-DCH resource are used by UEs in CELL_FACH and IDLE mode under direct control of Node B and are shared between UEs using E-DCH transmission in CELL_FACH, Idle mode and CELL_DCH.

3.2 Abbreviations p. 10

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply:

Absolute Grant

E-AGCH

E-DCH Absolute Grant Channel

E-DPCCH

E-DCH Dedicated Physical Control Channel (FDD only)

E-DPDCH

E-DCH Dedicated Physical Data Channel (FDD only)

E-HICH

E-DCH HARQ Acknowledgement Indicator Channel

E-PUCH

E-DCH Uplink Physical Channel (TDD only)

E-RGCH

E-DCH Relative Grant Channel

E-RUCCH

E-DCH Random Access Uplink Control Channel (TDD only)

E-RNTI

E-DCH Radio Network Temporary Identifier

E-ROCH

E-DCH Rank and Offset Channel (FDD only)

E-TFC

E-DCH Transport Format Combination

E-UCCH

E-DCH Uplink Control Channel (TDD only)

HARQ

Hybrid Automatic Repeat Request

HSDPA

High Speed Downlink Packet Access

HSUPA

High Speed Uplink Packet Access

MC-HSUPA

Multi-Carrier HSUPA

MU-MIMO

Multi-User Multiple Input Multiple Output

Relative Grant

RLS

Radio Link Set

RSN

Retransmission Sequence Number

S-E-DPCCH

Secondary E-DPCCH (FDD only)

S-E-DPDCH

Secondary E-DPDCH (FDD only)

Serving Grant

TSN

Transmission Sequence Number

4 Background and introduction p. 10

The technical purpose of the Enhanced Uplink feature is to improve the performance of uplink dedicated and common (FDD and 1.28Mcps TDD only) transport channels, i.e. to increase capacity and throughput and reduce delay. This is applicable for UTRA TDD and FDD.

The following techniques are part of the Enhanced Uplink feature:

Node B controlled scheduling: possibility for the Node B to control, within the limits set by the RNC, the set of TFCs from which the UE may choose a suitable TFC.
Node B controlled physical resource scheduling (TDD ony).
Hybrid ARQ: rapid retransmissions of erroneously received data packets between UE and Node B.
Higher order modulation (16QAM) (TDD and FDD).
Higher order modulation (64QAM) (FDD only).
Intra-frame code hopping (3.84 Mcps and 7.68 Mcps TDD only).
Shorter TTI: possibility of introducing a 2 ms TTI (FDD only).
Enhanced Uplink in CELL_FACH state and Idle mode (FDD and 1.28Mcps TDD only).
Dual Cell E-DCH (FDD).
Multi-Carrier E-DCH (1.28 Mcps TDD only).
Uplink Transmit Diversity (FDD).
Uplink MIMO (FDD only).
Serving E-DCH cell decoupling (FDD only).

5 Requirements p. 11

The Enhanced Uplink feature shall aim at providing significant enhancements in terms of user experience (throughput and delay) and/or capacity. The coverage is an important aspect of the user experience and that it is desirable to allow an operator to provide for consistency of performance across the whole cell area.
The focus shall be on urban, sub-urban and rural deployment scenarios.
Full mobility shall be supported, i.e., mobility should be supported for high-speed cases also, but optimisation should be for low-speed to medium-speed scenarios.
Improvements in the uplink performance of dedicated transport channels are required, with priority given to improving performance with respect to streaming, interactive and background services. Relevant QoS mechanisms shall allow the support of streaming, interactive and background PS services.
It is highly desirable to keep the Enhanced Uplink as simple as possible. New techniques or group of techniques shall therefore provide significant incremental gain for an acceptable complexity. The value added per feature/technique should be considered in the evaluation. It is also desirable to avoid unnecessary options in the specification of the feature.
The UE and network complexity shall be minimised for a given level of system performance.
The impact on current releases in terms of both protocol and hardware perspectives shall be taken into account.
It shall be possible to introduce the Enhanced Uplink feature in a network which has terminals from Release'99, Release 4 and Release 5. The Enhanced Uplink feature shall enable to achieve significant improvements in overall system performance when operated together with HSDPA. Emphasis shall be given on the potential impact the new feature may have on the downlink capacity. Likewise it shall be possible to deploy the Enhanced Uplink feature without any dependency on the deployment of the HSDPA feature. However, a terminal supporting the Enhanced Uplink feature shall support HSDPA.
Commonality between TDD and FDD E-DCH features is desired as long as system performance is not impaired.
For TDD, it shall be possible to run enhanced uplink in parallel with HS-DSCH without associated (or otherwise) uplink or downlink dedicated physical channels.
For FDD, it shall be possible to combine the REL99 random access signature transmission and power ramping phase with E-DCH transmission, called Enhanced Uplink in CELL_FACH and Idle mode. Improvements in the uplink performance of dedicated and common transport channels in Idle and Connected mode are required.
For 1.28Mcps TDD, it shall be possible to run enhanced uplink in CELL_FACH and Idle mode, called Enhanced Uplink in CELL_FACH and Idle mode.
For FDD, it shall be possible to have simultaneous transmission of two E-DCH transport channels when Dual Cell HSDPA operation on a single frequency band is configured, or across two frequency bands, called Dual Cell E-DCH operation.
For 1.28 Mcps TDD, it shall be possible to have simultaneous transmission of multiple E-DCH transport channels on a single frequency band, called Multi-Carrier E-DCH or MC-HSUPA operation, with the characteristic that the E-DCH associated channels (including control channel and traffic channel) are allocated on more than one carriers.
For FDD, it shall be possible to apply uplink transmit diversity when uplink transmit diversity is configured.
For FDD, it shall be possible to apply uplink MIMO when configured.