TS 125 214 - V3.1.1 - Universal Mobile Telecommunications System (UMTS); Physical layer procedures (FDD) (3G TS 25.214 version 3.1.1 Release 1999)

41 Pages·0.38 MB·English

by  European Telecommunications Standards Institute

ETSI TS 125 214
V3.1.1
(2000-01)
TechnicalSpecification
Universal Mobile Telecommunications System (UMTS);
Physical layer procedures (FDD)
(3G TS 25.214 version 3.1.1 Release 1999)
(3GTS25.214version3.1.1Release1999) 1 ETSITS125214V3.1.1(2000-01)
Reference
DTS/TSGR-0125214U
Keywords
UMTS
ETSI
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(3GTS25.214version3.1.1Release1999) 2 ETSITS125214V3.1.1(2000-01)
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Foreword
ThisTechnicalSpecification(TS)hasbeenproducedbytheETSI3rdGenerationPartnershipProject(3GPP).
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ETSI
3G TS 25.214 version 3.1.0 3 3G TS 25.214 V3.1.1 (1999-12)
Contents
Foreword............................................................................................................................................................5
1 Scope........................................................................................................................................................6
2 References................................................................................................................................................6
3 Abbreviations...........................................................................................................................................6
4 Synchronisation procedures.....................................................................................................................7
4.1 Cell search.........................................................................................................................................................7
4.2 Common physical channel synchronisation.......................................................................................................7
4.3 DPCCH/DPDCH synchronisation.....................................................................................................................7
4.3.1 General.........................................................................................................................................................7
4.3.2 No existing uplink dedicated channel...........................................................................................................7
4.3.3 With existing uplink dedicated channel.......................................................................................................8
4.3.4 Transmission timing adjustments.................................................................................................................9
5 Power control...........................................................................................................................................9
5.1 Uplink power control.........................................................................................................................................9
5.1.1 PRACH........................................................................................................................................................9
5.1.1.1 General...................................................................................................................................................9
5.1.1.2 Setting of PRACH control and data part power difference....................................................................9
5.1.2 DPCCH/DPDCH........................................................................................................................................10
5.1.2.1 General.................................................................................................................................................10
5.1.2.2 Ordinary transmit power control..........................................................................................................10
5.1.2.2.1 General............................................................................................................................................10
5.1.2.2.2 Algorithm 1 for processing TPC commands...................................................................................11
5.1.2.2.3 Algorithm 2 for processing TPC commands...................................................................................11
5.1.2.3 Transmit power control in compressed mode.......................................................................................13
5.1.2.4 Transmit power control in DPCCH power control preamble...............................................................14
5.1.2.5 Setting of the uplink DPCCH/DPDCH power difference.....................................................................14
5.1.2.5.1 General............................................................................................................................................14
5.1.2.5.2 Signalled gain factors......................................................................................................................14
5.1.2.5.3 Computed gain factors....................................................................................................................15
5.1.2.5.4 Setting of the uplink DPCCH/DPDCH power difference in compressed mode.............................15
5.1.3 PCPCH.......................................................................................................................................................16
5.1.3.1 Power control in the message part........................................................................................................16
5.1.3.2 Power control in the power control preamble.......................................................................................16
5.2 Downlink power control..................................................................................................................................16
5.2.1 DPCCH/DPDCH........................................................................................................................................17
5.2.1.1 General.................................................................................................................................................17
5.2.1.2 Ordinary transmit power control..........................................................................................................17
5.2.1.2.1 General............................................................................................................................................17
5.2.1.2.2 Adjustment loop..............................................................................................................................17
5.2.1.3 Power control in compressed mode......................................................................................................18
5.2.1.4 Site selection diversity transmit power control.....................................................................................18
5.2.1.4.1 General............................................................................................................................................18
5.2.1.4.2 TPC procedure in UE......................................................................................................................19
5.2.1.4.3 Selection of primary cell.................................................................................................................19
5.2.1.4.4 Delivery of primary cell ID.............................................................................................................19
5.2.1.4.5 TPC procedure in the network........................................................................................................20
5.2.2 Power Control with DSCH.........................................................................................................................20
5.2.3 AICH..........................................................................................................................................................20
5.2.4 PICH..........................................................................................................................................................20
6 Random access procedure......................................................................................................................21
6.1 Physical random access procedure...................................................................................................................21
6.1.1 RACH sub-channels...................................................................................................................................22
6.2 CPCH Access Procedures................................................................................................................................22
3GPP
3G TS 25.214 version 3.1.0 4 3G TS 25.214 V3.1.1 (1999-12)
7 Procedures in Packet Data Transfer.......................................................................................................24
8 Closed loop mode transmit diversity.....................................................................................................25
8.1 Determination of feedback information...........................................................................................................26
8.2 Closed loop mode 1.........................................................................................................................................26
8.2.1 Mode 1 end of frame adjustment................................................................................................................28
8.2.2 Mode 1 normal initialization......................................................................................................................28
8.2.3 Mode 1 operation during compressed mode..............................................................................................28
8.2.3.1 Downlink in compressed mode and uplink in normal mode................................................................28
8.2.3.2 Both downlink and uplink in compressed mode...................................................................................29
8.3 Closed loop mode 2.........................................................................................................................................29
8.3.1 Mode 2 end of frame adjustment................................................................................................................31
8.3.2 Mode 2 normal Initialisation......................................................................................................................31
8.3.3 Mode 2 operation during compressed mode..............................................................................................32
8.3.3.1 Downlink in compressed mode and uplink in normal mode................................................................32
8.3.3.2 Both downlink and uplink in compressed mode...................................................................................32
9 Uplink synchronous transmission..........................................................................................................33
9.1 General.............................................................................................................................................................33
9.2 Initial synchronisation......................................................................................................................................33
9.3 Tracking process..............................................................................................................................................33
10 Idle Periods for IPDL Location method......................................................................................................34
10.1 Parameters of IPDL.........................................................................................................................................34
10.2 Calculation of Idle Period Position..................................................................................................................34
Annex A (informative): Antenna verification..............................................................................................36
Annex B (Informative): Power control timing............................................................................................37
Annex C (Informative): Cell search procedure...........................................................................................38
Annex D (informative): Change history.......................................................................................................39
History..............................................................................................................................................................40
3GPP
3G TS 25.214 version 3.1.0 5 3G TS 25.214 V3.1.1 (1999-12)
Foreword
This Technical Specification has been produced by the 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 this TS, it will be re-released by the TSG with an identifying
change of release date and an increase in version number as follows:
Version 3.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 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 specification;
3GPP
3G TS 25.214 version 3.1.0 6 3G TS 25.214 V3.1.1 (1999-12)
1 Scope
The present document specifies and establishes the characteristics of the physicals layer procedures in the FDD mode of
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.
[1] TS 25.211: "Physical channels and mapping of transport channels onto physical channels (FDD)"
[2] TS 25.212: "Multiplexing and channel coding (FDD)"
[3] TS 25.213: "Spreading and modulation (FDD)"
[4] TS 25.215: "Physical layer – Measurements (FDD)"
3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ASC Access Service Class
AP Access Preamble
BCH Broadcast Channel
CCPCH Common Control Physical Channel
CD Collision Detection
CPCH Common Packet Channel
DCH Dedicated Channel
DPCCH Dedicated Physical Control Channel
DPCH Dedicated Physical Channel
DTX Discontinuous Transmission
DPDCH Dedicated Physical Data Channel
FACH Forward Access Channel
MUI Mobile User Identifier
PCH Paging Channel
PCPCH Physical Common Packet Channel
PI Paging Indication
PRACH Physical Random Access Channel
RACH Random Access Channel
SCH Synchronisation Channel
SIR Signal-to-Interference Ratio
SSDT Site Selection Diversity TPC
TPC Transmit Power Control
UE User Equipment
3GPP
3G TS 25.214 version 3.1.0 7 3G TS 25.214 V3.1.1 (1999-12)
4 Synchronisation procedures
4.1 Cell search
During the cell search, the UE searches for a cell and determines the downlink scrambling code and common channel
frame synchronisation of that cell. How cell search is typically done is described in Annex C.
4.2 Common physical channel synchronisation
The radio frame timing of all common physical channels can be determined after cell search. The P-CCPCH radio
frame timing is found during cell search and the radio frame timing of all common physical channel are related to that
timing as described in 25.211.
4.3 DPCCH/DPDCH synchronisation
4.3.1 General
The synchronisation of the dedicated physical channels can be divided into two cases:
- when a downlink dedicated physical channel and uplink dedicated physical channel shall be set up at the same
time;
- or when a downlink dedicated physical channel shall be set up and there already exist an uplink dedicated
physical channel.
The two cases are described in subclauses 4.3.2 and 4.3.3 respectively.
4.3.2 No existing uplink dedicated channel
The assumption for this case is that a DPCCH/DPDCH pair shall be set up in both uplink and downlink, and that there
exist no uplink DPCCH/DPDCH already. This corresponds to the case when a dedicated physical channel is initially set
up on a frequency.
The synchronization establishment procedures of the dedicated physical channel are described below. The
synchronization establishment flow is shown in figure 1.
a) UTRAN starts the transmission of downlink DPCCH/DPDCHs. The DPDCH is transmitted only when there is
data to be transmitted to the UE.
b) The UE establishes downlink chip synchronization and frame synchronization based on the CPICH timing and
timing offset information notified from UTRAN. Frame synchronization can be confirmed using the Frame
Synchronization Word. Successful frame synchronization is confirmed and reported to the higher layers when S
R
successive frames have been confirmed to be frame synchronized. Otherwise, frame synchronization failure is
reported to the higher layers.
c) The UE starts the transmission of the uplink DPCCH/DPDCHs at a frame timing exactly T chips after the frame
0
timing of the received downlink DPCCH/DPDCH. The DPDCH is transmitted only when there is data to be
transmitted. The UE immediately starts inner-loop power control as described in sections 5.1.2 and 5.2.1, i.e. the
transmission power of the uplink DPCCH/DPDCH follows the TPC commands generated by UTRAN, and the
UE performs SIR estimation to generate TPC commands transmitted to UTRAN.
d) UTRAN establishes uplink channel chip synchronization and frame synchronization. Frame synchronization can
be confirmed using the Frame Synchronization Word. Successful frame synchronization is confirmed and
reported to the higher layers when S successive frames have been confirmed to be frame synchronized.
R
Otherwise, frame synchronization failure is reported to the higher layers.
3GPP
3G TS 25.214 version 3.1.0 8 3G TS 25.214 V3.1.1 (1999-12)
UE UTRAN
Start downlink
synchronisation process
Start transmission of
downlink channels
Establish chip and frame
synchronisation and report Start uplink
status to higher layers synchronisation process
Start transmission of
uplink channels
Establish chip and frame
synchronisation and report
status to higher layers
Figure 1: Synchronisation establishment flow for dedicated channels:
uplink dedicated channel not existing
4.3.3 With existing uplink dedicated channel
The assumption for this case is that there already exist DPCCH/DPDCHs in the uplink, and a corresponding dedicated
physical channel shall be set up in the downlink. This corresponds to the case when a new cell has been added to the
active set in soft handover and shall begin its downlink transmission.
At the start of soft handover, the uplink dedicated physical channel transmitted by the UE, and the downlink dedicated
physical channel transmitted by the soft handover source cell continues transmitting as usual.
The synchronisation establishment flow is described in figure 2.
a) The UE starts the chip synchronisation establishment process of downlink channels from the handover
destination. The uplink channels being transmitted shall continue transmission as before.
b) UTRAN starts the transmission of the downlink DPCCH/DPDCH at a frame timing such that the frame timing
received at the UE will be within T ± 148 chips prior to the frame timing of the uplink DPCCH/DPDCH at the
0
UE. UTRAN then starts the synchronization establishment process of the uplink DPCCH/DPDCH transmitted by
the UE. Frame synchronization can be confirmed using the Frame Synchronization Word. Successful frame
synchronization is confirmed and reported to the higher layers when S successive frames have been confirmed
R
to be frame synchronized. Otherwise, frame synchronization failure is reported to the higher layers.
c) Based on the handover destination CPICH reception timing, the UE establishes chip synchronisation of downlink
channels from handover destination cell. Frame synchronization can be confirmed using the Frame
Synchronization Word. Successful frame synchronization is confirmed and reported to the higher layers when S
R
successive frames have been confirmed to be frame synchronized. Otherwise, frame synchronization failure is
reported to the higher layers.
3GPP
3G TS 25.214 version 3.1.0 9 3G TS 25.214 V3.1.1 (1999-12)
UE UTRAN
Start downlink
synchronisation process
Start transmission of
downlink channels
Establish chip and frame
synchronisation and report Start uplink
status to higher layers synchronisation process
Establish chip and frame
synchronisation and report
status to higher layers
Figure 2: Synchronisation establishment flow for dedicated channels:
uplink dedicated channel already existing
4.3.4 Transmission timing adjustments
During a connection the UE may adjust its DPDCH/DPCCH transmission time instant.
If the receive timing for any downlink DPCCH/DPDCH in the current active set has drifted, so the time between
reception of the downlink DPCCH/DPDCH in question and transmission of uplink DPCCH/DPDCH lies outside the
valid range, L1 shall inform higher layers of this, so that the network can be informed of this and downlink timing can
be adjusted by the network.
NOTE: The maximum rate of uplink TX time adjustment, and the valid range for the time between downlink
DPCCH/DPDCH reception and uplink DPCCH/DPDCH transmission in the UE is to be specified by
RAN WG4.
5 Power control
5.1 Uplink power control
5.1.1 PRACH
5.1.1.1 General
The power control during the physical random access procedure is described in clause 6. The setting of power of the
message control and data parts is described in the next sub-clause.
5.1.1.2 Setting of PRACH control and data part power difference
The message part of the uplink PRACH channel shall employ gain factors to control the control/data part relative power
similar to the uplink dedicated physical channels. Hence, section 5.1.2.4 applies also for the RACH message part, with
the differences that:
3GPP