ETSI TS 125 300 V14.3.0 (2017-07)

Universal Mobile Telecommunications System (UMTS); Universal Terrestrial Radio Access Network (UTRAN); General description; Stage 2 (3GPP TS 25.300 version 14.3.0 Release 14)

RTS/TSGR-0225300ve30

General Information

• Status: Published
• Publication Date: 25-Jul-2017
• Technical Committee: 3GPP RAN 2 - Radio layer 2 specification and Radio layer 3 RR specification
• Current Stage: 12 - Completion
• Completion Date: 26-Jul-2017

Standards Content (Sample)

ETSI TS 125 300 V14.3.0 (2017-07)






TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
Universal Terrestrial Radio Access Network (UTRAN);
General description;
Stage 2
(3GPP TS 25.300 version 14.3.0 Release 14)

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3GPP TS 25.300 version 14.3.0 Release 14 1 ETSI TS 125 300 V14.3.0 (2017-07)



Reference
RTS/TSGR-0225300ve30
Keywords
UMTS
ETSI
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ETSI

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3GPP TS 25.300 version 14.3.0 Release 14 2 ETSI TS 125 300 V14.3.0 (2017-07)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
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Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
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
http://webapp.etsi.org/key/queryform.asp.
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 25.300 version 14.3.0 Release 14 3 ETSI TS 125 300 V14.3.0 (2017-07)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
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 Heterogeneous Networks Mobility Enhancements . 7
5 Heterogeneous Networks Enhancements . 7
6 DCH Enhancements (FDD only) . 8
6.1 DL overhead optimization . 8
6.2 Enhanced rate matching and transport channel multiplexing . 8
6.3 DL frame early termination (DL FET) and UL DPCCH with DL FET ACK . 8
6.3.1 DL FET Full mode (Mode 1) . 9
6.3.2 DL FET Basic mode (Mode 0) . 9
6.4 Uplink DPDCH dynamic 10ms transmission . 9
7 Access Control in Connected Mode (CELL_FACH, CELL_PCH and URA_PCH) . 9
8 Access control enhancements . 10
8.1 DSAC and PPAC update for the UE in CELL_DCH state . 10
9 Enhanced Broadcast of System Information . 10
9.1 Second system information broadcast channel . 10
9.2 Scheduling information overhead reduction . 12
9.3 MIB and Cell Value Tag range extension . 12
10 RAN assisted WLAN interworking . 12
10.1 General principles. 12
10.2 Access network selection and traffic steering rules . 13
11 Increased minimum number of carriers to monitor . 13
12 Extended DRX in Idle mode . 13
13 L2 and L3 Downlink enhancements for UMTS . 14
13.1 Retrievable configurations. 14
13.2 URA_PCH with seamless transition. 14
13.3 Optimization from IDLE to CONNECTED state . 14
13.4 Blind HARQ retransmissions for HSDPA . 15
13.5 Enhanced state transition . 15
13.6 Improved synchronized RRC procedures . 15
14 Downlink TPC enhancements for UMTS . 15
15 NAICS offloading (FDD only) . 15
16 ACDC in Idle Mode . 15
17 RRC optimization . 16
17.1 RRC measurement events for UPH reporting . 16
17.2 Simultaneous Setup and Release of RABs and RBs . 16
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3GPP TS 25.300 version 14.3.0 Release 14 4 ETSI TS 125 300 V14.3.0 (2017-07)
18 HS-SCCH DRX in CELL_FACH state (FDD only) . 16
19 Dual Cell E-DCH operation enhancements . 16
20 QoE Measurement Collection for streaming services . 16
21 DL Interference Mitigation (FDD only) . 17
Annex A (informative): Change history . 18
History . 19

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3GPP TS 25.300 version 14.3.0 Release 14 5 ETSI TS 125 300 V14.3.0 (2017-07)
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.
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3GPP TS 25.300 version 14.3.0 Release 14 6 ETSI TS 125 300 V14.3.0 (2017-07)
1 Scope
The present document provides an overview and overall description of the UTRA radio interface functionalities from
Release 12 onwards which are not covered by the Technical Specifications TS 25.308 [2] or TS 25.319 [3].
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 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 25.308: "UTRA HSDPA: UTRAN Overall Description (Stage 2) ".
[3] 3GPP TS 25.319: "Enhanced Uplink: Overall description (Stage 2) ".
[4] 3GPP TS 24.008: "Mobile radio interface layer 3 specification, Core Network Protocols - Stage 3".
[5] 3GPP TS 23.060: "General Packet Radio Service (GPRS); Service description; Stage 2".
[6] 3GPP TS 23.682: "Architecture enhancements to facilitate communications with packet data
networks and applications".
[7] 3GPP TR 25.704: "Study on enhanced broadcast of system information".
[8] 3GPP TS 24.312: "Access Network Discovery and Selection Function (ANDSF) Management
Object (MO)".
[9] 3GPP TS 25.304: "User Equipment (UE) procedures in idle mode and procedures for cell
reselection in connected mode".
[10] 3GPP TS 23.402: "Architecture enhancements for non-3GPP accesses".
[11] 3GPP TS 25.133: "Requirements for support of radio resource management (FDD)".
[12] 3GPP TS 25.331: "Radio Resource Control (RRC)”.
[13] 3GPP TR 25.993: "Typical examples of Radio Access Bearers (RABs) and Radio Bearers (RBs)
supported by Universal Terrestrial Radio Access (UTRA)".
[14] 3GPP TS 37.320: "Universal Terrestrial Radio Access (UTRA) and Evolved Universal Terrestrial
Radio Access (E-UTRA); Radio measurement collection for Minimization of Drive Tests (MDT);
Overall description; Stage 2".
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in TR 21.905 [1] and the following apply. A
term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 [1].
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3GPP TS 25.300 version 14.3.0 Release 14 7 ETSI TS 125 300 V14.3.0 (2017-07)
Power saving mode: Mode configured and controlled by NAS that allows the UE to reduce its power consumption, as
defined in TS 24.008 [4], TS 23.060 [5], TS 23.682 [6].
3.2 Symbols
For the purposes of the present document, the following symbols apply:

3.3 Abbreviations
For the purposes of the present document, the abbreviations given in TR 21.905 [1] and the following apply. An
abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in
TR 21.905 [1].
ACDC Application specific Congestion control for Data Communication
ANDSF Access Network Discovery and Selection Function
DPCCH2 Dedicated Physical Control Channel 2
NCL Neighbour Cell List
OPI Offload Preference Indicator
PSM Power Saving Mode
QoE Quality of Experience
WLAN Wireless Local Area Network
4 Heterogeneous Networks Mobility Enhancements
Neighbour Cell List (NCL) extension
- The size of the inter-frequency neighbour cell list is extended for CELL_DCH, CELL_FACH, CELL_PCH,
URA_PCH states and Idle mode, so that network could configure more inter-frequency neighbour cells than 32
for UE to monitor and detect under massive small cell deployment scenario.
Change of best cell on a configured secondary downlink frequency (event 2g)
- Event 2g is an inter-frequency measurement event. It is applicable only to the secondary downlink frequency
with configured HS-DSCH operation, and it can be configured on more than one secondary downlink frequency.
Enhanced Serving Cell Change for Event 1C
- The enhanced Serving Cell Change procedure could also be applied to Event 1C, which is defined in TS 25.308
[2].
5 Heterogeneous Networks Enhancements
Serving E-DCH cell decoupling
- Serving E-DCH cell decoupling is introduced in order to improve the quality of reception of the uplink E-DCH
control channels and the E-DCH SI in the presence of strong uplink/downlink imbalance. The UE is configured
with different serving HS-DSCH cell and serving E-DCH cell.
Radio Links without DPCH/F-DPCH
- The UE is configured with a subset of non-serving E-DCH radio links in the UE’s E-DCH active set to operate
in the absence of DPCH/F-DPCH. However, a UE is allowed to only receive either E-HICH or both E-HICH and
E-RGCH from these non-serving E-DCH cells to mitigate uplink interference to a cell that is unable to power
control a UE in the presence of strong uplink/downlink imbalance.
DPCCH2 transmission
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3GPP TS 25.300 version 14.3.0 Release 14 8 ETSI TS 125 300 V14.3.0 (2017-07)
- In order to improve the quality of reception of the HS-DPCCH in the presence of strong uplink/imbalance, a new
secondary uplink pilot channel (DPCCH2) is introduced in the serving HS-DSCH cell as the reference for the
HS-DPCCH channel power.
6 DCH Enhancements (FDD only)
DCH enhancements aims at improving the link efficiency and UE battery performance for voice calls compared to R99
DCH. DCH enhancements constitutes of the following sub-features:
- DL overhead optimization
- Enhanced rate matching and transport channel multiplexing
- DL Frame Early Termination (DL FET)
- Uplink DPCCH with DL FET ACK
- Uplink DPDCH dynamic 10ms transmission
DCH enhancements supports two modes (Basic and Full). The mode choice controls how the DL Frame Early
Termination sub-feature operates, as described in 6.3. All other sub-features are active in both modes.
DCH enhancements is only applicable if the TTI of all DCH transport channels on both downlink and uplink is at least
20 ms.
If a UE is configured with both CS and PS mapped to the DCH transport channel (in uplink or downlink or both), then
DCH enhancements may be configured only when PS has UL:0 and DL:0kbps RAB configuration (3GPP TR 25.993
[13]).
6.1 DL overhead optimization
This sub-feature introduces new DL DPCH slot format by removing the dedicated pilot bits from DL DPCCH and
reusing them for DL DPDCH instead.
The R99 downlink physical channel (DPCH) consists of 0.66ms slots that contain 2 groups of data (DPDCH) symbols
and 3 groups of control (DPCCH) symbols. The size of the groups is determined by the slot format. The control symbol
groups are TPC - controlling uplink transmit power, TFCI - specifying the downlink packet type, and dedicated pilot -
supporting channel estimation for DL power control and closed-loop transmit diversity. While the TFCI group may be
empty in certain slot formats, the pilot and TPC are currently always non-empty. The dedicated pilot bits are used for
estimation of DL SIR. With this sub-feature, new DL DPCH slot formats are introduced by removing the dedicated
pilot bits and reusing the TPC bits instead for estimating the DL SIR. Correspondingly, the number of data symbols in a
slot is increased leading to less control channel overhead on the downlink.
DL closed-loop transmit diversity is not supported when this sub-feature is configured.
6.2 Enhanced rate matching and transport channel multiplexing
The physical layer in R99 is designed to carry potentially a large variety of transport blocks with different sizes. The
drawback for this design is the rate matching may not be efficient when some transport format combinations are not
frequently used. For example, DCCH channel carries non-zero transport blocks not as often as voice DTCH channel.
The enhanced rate matching and transport channel multiplexing sub-feature sets a zero rate matching attribute for
DCCH, whenever DCCH channel does not carry a transport block together with DTCH channel. The DCCH bit fields
are used to transmit DTCH transport channels instead. This potentially improves link efficiency due to less puncturing
and better rate matching of the transport block with the available physical channel resources.
6.3 DL frame early termination (DL FET) and UL DPCCH with
DL FET ACK
In a power-controlled system such as R99 DCH, inefficiencies in the power-control loop, such as limited granularity,
delays and errors in the feedback, result in the presence of excess SINR at the receiver. This means that packets such as
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3GPP TS 25.300 version 14.3.0 Release 14 9 ETSI TS 125 300 V14.3.0 (2017-07)
the voice packets which have a long (20ms) transmission time interval (TTI) can often be early-decoded, i.e, decoded
prior to reception of all the data symbols in a TTI by running the channel decoder at multiple time instants during the
TTI instead of only once at the end of the TTI. This is referred to as Frame Early Termination (FET). As described
below, DCH enhancements introduces new mechanisms to R99 DCH in order to support DL FET.
A new design of UL DPCCH is introduced to support DL FET. With the new design, TFCI information is carried in the
first 10 slots of each 20ms TTI for the uplink. Sending the TFCI information early in each 20ms TTI allows sending of
DL FET ACK or NACK information using the TFCI bits in remaining UL DPCCH slots that do not carry TFCI.
Furthermore, there are two modes of operation introduced with support for DL FET in DCH enhancements as described
below.
6.3.1 DL FET Full mode (Mode 1)
In the Full mode of operation:
- The UE acknowledges successful early decoding of a DL packet via a DL FET ACK on the newly designed UL
DPCCH channel, which then allows the NodeB to stop transmission of the packet.
- AMR Class A, B, C transport channels are concatenated on the DL which further helps in early decoding of DL
DPDCH.
6.3.2 DL FET Basic mode (Mode 0)
In the Basic mode of operation:
- DL FET is achieved by applying the DL BLER target at slot 14 (10ms) in each 20ms TTI duration. The NodeB
may decide to stop transmission of the DL voice packet at slot 14 provided that the Uplink is in 10ms
transmission mode (see sub-clause 6.4). The UE does not indicate successful decoding of the DL packet via the
DL FET ACK or NACK field in UL DPCCH.
- AMR Class A, B, C transport channels are not concatenated on the downlink.
6.4 Uplink DPDCH dynamic 10ms transmission
The R99 DCH transport channels for a voice call are typically configured with 20ms TTI. However, the transport block
sizes for a voice call could potentially be transmitted over a shorter duration. The sub-feature of uplink DPDCH
dynamic 10ms transmission allows for dynamically selecting a shorter transmission time, i.e. 10ms, at the physical layer
to transmit a voice packet on the uplink. The UE selects on whether to use a 10ms or 20ms transmission duration based
on considerations such as the power headroom at the UE. The UE also discontinues the transmission of UL DPCCH for
the remaining duration of the TTI when both UL transport block has been completed transmitted and DL has been
successfully decoded early.
With 20ms TTI transmission at the physical layer, the pilot channel (UL DPCCH) is sent for the entire 20ms duration.
This sub-feature potentially improves link efficiency due to reduction in UL DPCCH overhead as well as improves UE
battery performance by allowing the UE to turn off its transceiver once the reception and transmission has been
completed before the end of a 20ms TTI.
7 Access Control in Connected Mode (CELL_FACH,
CELL_PCH and URA_PCH)
For FDD, certain categories of UEs may be configured for Access Control in connected mode. This feature allows for a
network to differentiate and control accesses of UE for DTCH transmission in CELL_FACH state and for
DCCH/CCCH due to uplink data transmission in CELL_PCH state or URA_PCH state, when uplink congestion is
being experienced.
The network may differentiate among the UE population by assigning UEs to one of 16 defined Access Groups. The
network can indicate the identity of the access group to which the UE is assigned via RRC dedicated signalling.
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3GPP TS 25.300 version 14.3.0 Release 14 10 ETSI TS 125 300 V14.3.0 (2017-07)
For each network assigned Access Group, the network can indicate in System Information whether the UEs in
CELL_FACH state, CELL_PCH state or URA_PCH state in that group are Blocked or Unblocked for DTCH data
transmission and for DCCH/CCCH due to uplink data transmission. The System Information Block containing the
Access Group information is scheduled by the network only during periods of uplink congestion. A UE in
CELL_FACH state, CELL_PCH state or URA_PCH state which has data to transmit and has an access group identity
will reacquire the System Information Block containing the Access Group information based on the expiration of a
timer.
UEs in CELL_PCH (without seamless transition to CELL_FACH state) or URA_PCH (without seamless transition to
CELL_FACH) are not allowed to initiate Cell Update procedure triggered due to DTCH data transmission with cause
"uplink data transmission" when the Access Group of the UE is Blocked.
UEs in CELL_PCH (with seamless transition to CELL_FACH state) or URA_PCH (with seamless transition to
CELL_FACH state) are not allowed to initiate Measurement Report procedure triggered due to DTCH data
transmission when the Access Group of the UE is Blocked.
A UE in CELL_FACH state, CELL_PCH state or URA_PCH state which is blocked for DTCH transmission and for
DCCH/CCCH due to data transmission in the uplink is permitted to transmit uplink RLC Control PDUs.
8 Access control enhancements
8.1 DSAC and PPAC update for the UE in CELL_DCH state
In CELL_DCH state, it allows the network to indicate to the UE about the DSAC and PPAC parameters through
dedicated signalling so that the UE can obtain the updated DSAC and PPAC information.
9 Enhanced Broadcast of System Information
9.1 Second system information broadcast channel
In order to increase system information capacity (see TR 25.704 [7]) a second system information broadcast channel on
SCCPCH can be configured, in addition to the system information broadcast channel on PCCPCH.
The second system information broadcast channel is mapped to a separate SCCPCH, which is different from the
SCCPCH used for paging and FACH/CTCH, as depicted in Figure 9.1-1.

Figure 9.1-1: Channel mapping of system information broadcast channel and second system
information broadcast channel.
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3GPP TS 25.300 version 14.3.0 Release 14 11 ETSI TS 125 300 V14.3.0 (2017-07)
The UE should be able to monitor at least two SCCPCHs simultaneously, but the UE may skip reading the second
system information broadcast channel during CTCH occasions in Idle mode and CELL_PCH/URA_PCH state. When
HS-DSCH in CELL_FACH is used, a UE supporting second system information broadcast channel monitors the
corresponding SCCPCH while listening to HS-DSCH.
REL-12 and later SIBs are introduced on both the system information broadcast channel as well as the second system
information broadcast channel. Pre-REL-12 SIBs may be broadcasted on the second system information broadcast
channel in addition to the system information broadcast channel. Any SIB type may be scheduled simultaneously on
system information broadcast channel and second system information broadcast channel provided that the content is the
same.
Most of the existing principles and procedures for system information reading are retained for the second system
information broadcast channel. To reduce the latency to acquire the system information on both system information
broadcast channel and second system information broadcast channel, the UE acquires the system information on both
channels simultaneously. The simultaneous acquisition of system information on both system information broadcast
channel and second system information broadcast channel is depicted in Figure 9.1-2.

Figure 9.1-2: System information acquisition on system information broadcast channel and second
system information broadcast channel.
When the SB3 value tag in PAGING TYPE 1 or SYSTEM INFORMATION CHANGE INDICATION (SICI) me
...