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TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
High Speed Downlink Packet Access (HSDPA);
Overall description;
Stage 2
(3GPP TS 25.308 version 15.0.0 Release 15)
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3GPP TS 25.308 version 15.0.0 Release 15 1 ETSI TS 125 308 V15.0.0 (2018-07)
Reference
RTS/TSGR-0625308vf00
Keywords
UMTS
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3GPP TS 25.308 version 15.0.0 Release 15 2 ETSI TS 125 308 V15.0.0 (2018-07)
Intellectual Property Rights
Essential patents
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Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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3GPP TS 25.308 version 15.0.0 Release 15 3 ETSI TS 125 308 V15.0.0 (2018-07)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 6
1 Scope . 7
2 References . 7
3 Definitions and abbreviations . 7
3.1 Definitions . 7
3.2 Abbreviations . 8
4 Background and Introduction . 9
5 Basic structure of HS-DSCH . 9
5.1 Protocol structure . 9
5.2 Basic physical structure . 10
5.2.1 HS-DSCH Characteristics . 10
5.2.2 DL HS-DSCH Physical layer model . 11
5.2.2.1 FDD Downlink Physical layer Model . 11
5.2.2.2 TDD Downlink Physical layer model . 13
5.2.3 UL Physical layer model . 16
5.2.4 HS-DSCH physical-layer structure in the code domain. 18
5.2.4.1 FDD. 18
5.2.4.2 TDD . 18
5.3 Transport channel attributes . 18
6 MAC architecture . 19
6.1 HS-DSCH MAC architecture – UE side . 19
6.1.1 Overall architecture. 19
6.1.2 Details of MAC-d . 20
6.1.3 Details of MAC-c/sh . 22
6.1.4 Details of MAC-hs . 22
6.1.5 Details of MAC-ehs . 24
6.2 HS-DSCH MAC architecture – UTRAN side . 26
6.2.1 Overall architecture. 26
6.2.2 Details of MAC-c/sh . 28
6.2.3 Details of MAC-hs . 29
6.2.4 Details of MAC-ehs . 31
7 HARQ protocol . 33
7.1 Signalling . 33
7.1.1 Uplink . 33
7.1.2 Downlink . 33
7.1.2.1 Shared control channel signalling . 33
7.1.2.2 In-band signalling on HS-DSCH. 34
7.2 Void . 34
7.3 Void . 34
7.4 Error handling . 34
8 Signalling parameters . 35
8.1 Downlink signalling parameters . 35
8.1.1 UE identification . 35
8.1.2 Transport Block Sizes . 35
8.1.3 Channelisation codes (FDD only) . 35
8.1.4 HS-PDSCH configuration (TDD only) . 35
8.1.5 HARQ information . 35
8.1.6 Measurement feedback rate (FDD only) . 35
8.1.7 HS-PDSCH power offset . 35
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3GPP TS 25.308 version 15.0.0 Release 15 4 ETSI TS 125 308 V15.0.0 (2018-07)
8.1.8 Void . 35
8.1.9 Void . 35
8.1.10 HS-SCCH Cyclic Sequence Number (HCSN) (TDD only) . 35
8.2 Uplink signalling parameters . 36
8.2.1 ACK/NACK . 36
8.2.2 Measurement report . 36
9 Mobility procedures . 36
9.1 Serving HS-DSCH cell change . 37
9.2 Serving HS-DSCH cell change mechanisms . 38
9.3 Intra-Node B synchronised serving HS-DSCH cell change . 38
9.4 Inter-Node B synchronised serving HS-DSCH cell change during hard handover . 39
9.5 Inter-Node B synchronised serving HS-DSCH cell change after active set update (radio link addition) 40
9.6 Serving HS-DSCH cell change with target cell pre-configuration . 42
10 Resource management . 43
11 Discontinuous UL DPCCH transmission and discontinous reception of F-DPCH and HSPA DL
channels in FDD . 44
11.1 Discontinuous uplink transmission . 44
11.1.1 Uplink DRX . 45
11.2 Downlink DRX . 46
11a Downlink Control Channel Discontinuous Reception in CELL_DCH state (1.28Mcps TDD
only) . 48
12 HS-SCCH-less HS-DSCH transmission in FDD . 48
12.1 HS-SCCH-less timing and operation . 49
13 MIMO modelling and operation in HSDPA channel in FDD . 50
13a MIMO modelling and operation in HSDPA channel in 1.28Mcps TDD . 51
13b MU-MIMO operation in HSDPA channel in 1.28Mcps TDD . 51
13c MIMO mode with four transmit antennas modelling and operation in HSDPA channel in FDD
(FDD only) . 52
14 HS-DSCH reception in CELL_FACH state (FDD only) . 53
14.1 UE operation . 53
14.2 Initial link adaptation . 54
14.3 Measurement Occasion . 54
14.4 Discontinuous reception . 54
14.4.1 HS-DSCH DRX operation in CELL_FACH state . 55
14.4.2 HS-DSCH DRX operation with second DRX cycle in CELL_FACH . 55
14.4.3 HS-SCCH DRX operation in CELL_FACH state . 57
15 HS-DSCH reception in CELL_PCH and URA_PCH states (FDD only) . 57
15.1 UE operation . 58
16 HS-DSCH reception in CELL_FACH state (1.28Mcps TDD only) . 59
16.1 UE operation . 59
16.2 Initial link adaptation . 60
16.3 Link adaptation when H-RNTI is allocated . 60
16.4 Discontinuous reception . 61
16.4.1 HS-DSCH DRX operation in CELL_FACH state . 61
16.5 Measurement Occasion . 61
17 HS-DSCH reception in CELL_PCH and URA_PCH states (1.28Mcps TDD only) . 61
17.1 UE operation . 62
18 Dual Cell HSDPA Operation (FDD only) . 63
18.1 Dual Cell HSDPA and MIMO . 64
18.2 Dual Band HSDPA Operation . 64
19 HS-SCCH-less HS-DSCH transmission in 1.28Mcps TDD . 65
19.1 HS-DSCH semi-persistent scheduling timing and operation . 65
ETSI
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3GPP TS 25.308 version 15.0.0 Release 15 5 ETSI TS 125 308 V15.0.0 (2018-07)
19.2 Assignment/reassignment of semi-persistent HS-PDSCH resources for HS-DSCH semi-persistent
scheduling transmission . 65
20 Four Carrier HSDPA Operation (FDD only) . 66
21 Eight Carrier HSDPA Operation (FDD only) . 67
22 Multiflow Operation (FDD only) . 68
23 Further Enhancements to CELL_FACH state (FDD only) . 71
23.1 NodeB triggered HS-DPCCH transmission . 71
24 DPCCH2 transmission (FDD only) . 72
25 Simplified HS-SCCH type 1 operation . 72
Annex A (informative): Void . 73
Annex B (informative): Change history . 74
History . 76
ETSI
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3GPP TS 25.308 version 15.0.0 Release 15 6 ETSI TS 125 308 V15.0.0 (2018-07)
Foreword
rd
This Technical Specification has been produced by the 3 Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
ETSI
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3GPP TS 25.308 version 15.0.0 Release 15 7 ETSI TS 125 308 V15.0.0 (2018-07)
1 Scope
The present document is a technical specification of the overall support of High Speed Downlink Packet Access in
UTRA.
2 References
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] 3GPP TR 25.855: "High Speed Downlink Packet Access (HSDPA): Overall UTRAN
Description".
[2] 3GPP TS 25.321: "Medium Access Control (MAC) protocol specification".
[3] 3GPP TS 25.319: "FDD Enhanced Uplink: Overall description".
[4] 3GPP TS 25.214: "Physical Layer Procedures (FDD)".
[5] 3GPP TS 25.331 "Radio Resource Control (RRC)".
[6] 3GPP TS 25.211 "Physical channels and mapping of transport channels onto physical channels
(FDD)".
[7] 3GPP TS 25.301 "Radio interface protocol architecture".
[8] 3GPP TS25.304 "User Equipment (UE) procedures in idle mode and procedures for cell
reselection in connected mode".
[9] 3GPP TS25.221 "Transport channels and physical channels (TDD)".
[10] 3GPP TS 25.224: "Physical Layer Procedures (TDD)".
[11] 3GPP TS 25.222: "Multplexing and Channel Coding (TDD)".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply.
Blind HARQ retransmissions for HSDPA (FDD): A HARQ operation where a UE in CELL_DCH state supports
reception of MAC-hs/ehs PDU within 5 sub-frames from the reception of the previous MAC-hs/ehs PDU intended for
the same HARQ process.
Data block: The data transmitted to one UE on HS-DSCH in one transport block (one or two transport blocks are
transmitted per TTI in single and dual stream transmission respectively per HS-DSCH, three transport blocks are
transmitted per TTI in three streams transmission per HS-DSCH and four transport blocks are transmitted per TTI in
four streams transmission per HS-DSCH).
Priority class: One flow of data within a HS-DSCH transport channel. One HS-DSCH can transport several priority
classes (no more priority classes per TTI than the number of transport blocks). There is only one priority class per TTI
(MAC-hs only) or several priority classes per TTI (MAC-ehs only).
ETSI
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HARQ Process: Peer state machines capable of achieving error correction by retransmission. One process can be used
only for one data block at a time.
HARQ Entity: Consists of all the HARQ processes of a UE for one HS-DSCH transport channel, controlling part or all
the available soft buffer capacity.
Serving HS-DSCH radio link: The radio link that the HS-PDSCH physical channel(s) allocated to the UE belongs to.
Serving HS-DSCH cell: The cell associated with the UTRAN access point performing transmission and reception of
the serving HS-DSCH radio link for a given UE. The serving HS-DSCH cell is always part of the current active set of
the UE.
Serving HS-DSCH Node B: A role a Node B may take with respect to a UE having one or several HS-PDSCHs
allocated. The serving HS-DSCH Node B is the Node B controlling the serving HS-DSCH cell.
HS-SCCH set: a set of HS-SCCH which is used for HS-PDSCH allocation. There is a maximum of four HS-SCCHs in
a given HS-SCCH set. There can be multiple HS-SCCH sets in one cell. HS-SCCH sets are independent, i.e. they can
overlap or have no intersection.
Serving HS-SCCH set: the HS-SCCH set being used by a given UE for HS-PDSCH allocations.
MAC-d flow: a MAC-d flow is a flow of MAC-d PDUs which belong to logical channels which are MAC-d
multiplexed.
Common MAC Flow: a Common MAC Flow is a flow of MAC-c PDU mapped to HS-DSCH configured for UEs in
Cell_FACH.
Paging MAC Flow: a Paging MAC Flow is a flow of MAC-c PDU mapped to HS-DSCH configured for UEs in
Cell_PCH and URA_PCH.
Multiflow: A mode of operation with two simultaneous HS-DSCH transport channels per carrier frequency, where the
HS-DSCH transport channels may belong to the same or different Node Bs.
Assisting serving HS-DSCH Cell: In addition to the serving HS-DSCH cell, a cell in the same frequency, where the
UE is configured to simultaneously monitor a HS-SCCH set and receive HS-DSCH if it is scheduled in that cell.
Assisting secondary serving HS-DSCH Cell: In addition to the serving HS-DSCH cell, a cell in the secondary
downlink frequency, where the UE is configured to simultaneously monitor a HS-SCCH set and receive HS-DSCH if it
is scheduled in that cell.
Designated non-serving HS-DSCH cell: The non-serving HS-DSCH cell from which the UE estimates the F-DPCH
quality for TPC derivation, when the UE is configured with DPCCH2 in the uplink or the Serving E-DCH cell
decoupling is configured. The TPC is transmitted on UL DPCCH.
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.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
16QAM 16 Quadrature Amplitude Modulation
CCTrCH Coded Composite Transport Channel
CQI Channel Quality Indicator
DPCCH2 Dedicated Physical Control Channel 2
HARQ Hybrid Automatic Repeat Request
HSDPA High Speed Downlink Packet Access
HS-DSCH High Speed Downlink Shared Channel
HS-PDSCH High Speed Physical Downlink Shared Channel
HS-SCCH Shared Control Channel for HS-DSCH
HS-SICH Shared Information Channel for HS-DSCH
MCS Modulation and Coding scheme
MIMO single user Multple Input Multiple Output
MU-MIMO Multi-User Multiple Input Multiple Output
NW Network
ETSI
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3GPP TS 25.308 version 15.0.0 Release 15 9 ETSI TS 125 308 V15.0.0 (2018-07)
QPSK Quadrature Phase Shift Keying
TFCI Transport Format Combination Indicator
TFRC Transport Format Resource Combination
TFRI Transport Format and Resource Indicator
TPC Transmit Power Control
TSN Transmission Sequence Number
UE User Equipment
4 Background and Introduction
High Speed Downlink Packet Access is based on techniques such as adaptive modulation and hybrid ARQ to achieve
high throughput, reduce delay and achieve high peak rates.
It relies on a new type of transport channel, the HS-DSCH, which is terminated in the Node B.
In FDD and 1.28Mcps TDD, the HS-DSCH reception is also supported in CELL_FACH, CELL_PCH and URA_PCH
state.
5 Basic structure of HS-DSCH
5.1 Protocol structure
The HS-DSCH functionality should be able to operate in an environment where certain cells are not updated with HS-
DSCH functionality
...