ETSI TS 101 851-4-2 V2.1.1 (2008-01)

Satellite Earth Stations and Systems (SES); Satellite Component of UMTS/IMT-2000; Part 4: Physical layer procedures; Sub-part 2: A-family (S-UMTS-A 25.214)

RTS/SES-00298-4-2

General Information

• Status: Published
• Publication Date: 30-Jan-2008
• Technical Committee: SES MSS - SES WG on Mobile Satellite Systems
• Current Stage: 12 - Completion
• Due Date: 08-Jan-2008
• Completion Date: 31-Jan-2008

Standards Content (Sample)

ETSI TS 101 851-4-2 V2.1.1 (2008-01)
Technical Specification


Satellite Earth Stations and Systems (SES);
Satellite Component of UMTS/IMT-2000;
Part 4: Physical layer procedures;
Sub-part 2: A-family (S-UMTS-A 25.214)

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2 ETSI TS 101 851-4-2 V2.1.1 (2008-01)



Reference
RTS/SES-00298-4-2
Keywords
MES, MSS, satellite, UMTS
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3 ETSI TS 101 851-4-2 V2.1.1 (2008-01)
Contents
Intellectual Property Rights.4
Foreword.4
Introduction .4
1 Scope.6
2 References.6
2.1 Normative references.6
2.2 Informative references.7
3 Abbreviations.7
4 Synchronization procedures.7
4.1 Initial satellite search.7
4.2 Common physical channel synchronization .7
4.3 DPCCH/DPDCH synchronization.7
4.3.1 Synchronization primitives.7
4.3.1.1 General.7
4.3.1.2 Downlink synchronization primitives.8
4.3.1.3 Uplink synchronization primitives .8
4.3.2 Radio link establishment.8
4.3.2.1 No existing uplink dedicated channel: initial synchronization.8
4.3.2.2 DPCCH/DPDCH diversity path synchronization.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 .10
5.1.2 DPCCH/DPDCH.10
5.1.2.1 General.10
5.1.2.1.1 Outer power control loop.10
5.1.2.1.2 Inner power control loop .10
5.2 Downlink power control.11
5.2.1 Primary CCPCH.11
5.2.2 Secondary CCPCH.11
5.2.3 DPCCH/DPDCH.11
5.2.4 Power Control with DSCH .11
6 Random Access (RACH) Procedure .12
Annex A (informative): Cell (satellite) search procedure .13
A.1 Initial acquisition.13
A.2 Satellite/beam diversity path acquisition.13
Annex B (informative): Bibliography.14
History .15

ETSI

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4 ETSI TS 101 851-4-2 V2.1.1 (2008-01)
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
server (http://webapp.etsi.org/IPR/home.asp).
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 Technical Committee Satellite Earth Stations and
Systems (SES).
The present document is specifying the Satellite Radio Interface referenced as SRI Family A at ITU-R, in the frame of
ITU-R Recommendation M.1457 [8].
The present document is part 4, sub-part 2 of a multi-part deliverable covering Satellite Earth Stations and Systems
(SES); Satellite Component of UMTS/IMT-2000; A-family, as identified below:
Part 1: "Physical channels and mapping of transport channels into physical channels";
Part 2: "Multiplexing and channel coding";
Part 3: "Spreading and modulation";
Part 4: "Physical layer procedures";
Sub-part 1: "G-family (S-UMTS-G 25.214)";
Sub-part 2: "A-family (S-UMTS-A 25.214)";
Part 5: "UE Radio Transmission and Reception";
Part 6: "Ground stations and space segment radio transmission and reception".
Introduction
S-UMTS stands for the Satellite component of the Universal Mobile Telecommunication System. S-UMTS systems will
complement the terrestrial UMTS (T-UMTS) and inter-work with other IMT-2000 family members through the UMTS
rd
core network. S-UMTS will be used to deliver 3 generation mobile satellite services (MSS) utilizing either low (LEO)
or medium (MEO) earth orbiting, or geostationary (GEO) satellite(s). S-UMTS systems are based on terrestrial 3GPP
specifications and will support access to GSM/UMTS core networks.
NOTE 1: The term T-UMTS will be used in the present document to further differentiate the Terrestrial UMTS
component.
Due to the differences between terrestrial and satellite channel characteristics, some modifications to the terrestrial
UMTS (T-UMTS) standards are necessary. Some specifications are directly applicable, whereas others are applicable
with modifications. Similarly, some T-UMTS specifications do not apply, whilst some S-UMTS specifications have no
corresponding T-UMTS specification.
ETSI

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5 ETSI TS 101 851-4-2 V2.1.1 (2008-01)
Since S-UMTS is derived from T-UMTS, the organization of the S-UMTS specifications closely follows the original
rd
3 Generation Partnership Project (3GPP) structure. The S-UMTS numbers have been designed to correspond to the
3GPP terrestrial UMTS numbering system. All S-UMTS specifications are allocated a unique S-UMTS number as
follows:
S-UMTS-n xx.yyy
Where:
• The numbers xx and yyy correspond to the 3GPP-numbering scheme.
• n (n=A, B, C, …) denotes the family of S-UMTS specifications.
An S-UMTS system is defined by the combination of a family of S-UMTS specifications and 3GPP specifications, as
follows:
• If an S-UMTS specification exists it takes precedence over the corresponding 3GPP specification (if any). This
precedence rule applies to any references in the corresponding 3GPP specifications.
NOTE 2: Any references to 3GPP specifications within the S-UMTS specifications are not subject to this
precedence rule. For example, an S-UMTS specification may contain specific references to the
corresponding 3GPP specification.
• If an S-UMTS specification does not exist, the corresponding 3GPP specification may or may not apply. The
exact applicability of the complete list of 3GPP specifications shall be defined at a later stage.
ETSI

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6 ETSI TS 101 851-4-2 V2.1.1 (2008-01)
1 Scope
The present document specifies the characteristics of the physical layer procedures used for family A of the satellite
component of UMTS (S-UMTS-A).
It is based on the FDD mode of UTRA defined by TS 125 211 [2], TS 125 212 [3], TS 125 213 [4], TS 125 214 [5] and
adapted for operation over satellite transponders.
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ETSI TS 101 851-1-2: "Satellite Earth Stations and Systems (SES); Satellite Component of
UMTS/IMT-2000; Part 1: Physical channels and mapping of transport channels into physical
channels; Sub-part 2: A-family (S-UMTS-A 25.211)".
[2] ETSI TS 125 211: "Universal Mobile Telecommunications System (UMTS); Physical channels
and mapping of transport channels onto physical channels (FDD) (3G TS 25.211 version 3.3.0
Release 1999)".
[3] ETSI TS 125 212: "Universal Mobile Telecommunications System (UMTS); Multiplexing and
channel coding (FDD) (3G TS 25.212 version 3.3.0 Release 1999)".
[4] ETSI TS 125 213: "Universal Mobile Telecommunications System (UMTS); Spreading and
modulation (FDD) (3G TS 25.213 version 3.3.0 Release 1999)".
[5] ETSI TS 125 214: "Universal Mobile Telecommunications System (UMTS); Physical layer
procedures (FDD) (3G TS 25.214 version 3.3.0 Release 1999)".
[6] ETSI TS 125 331: "Universal Mobile Telecommunications System (UMTS); RRC Protocol
Specification (3G TS 25.331 version 3.3.0 Release 1999)".
ETSI

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7 ETSI TS 101 851-4-2 V2.1.1 (2008-01)
[7] ETSI TS 125 101: "Universal Mobile Telecommunications System (UMTS); UE Radio
transmission and Reception (FDD) (3G TS 25.101 version 3.3.0 Release 1999)".
2.2 Informative references
[8] ITU-R Recommendation M.1457 (2006): "Detailed specifications of the radio interfaces of
International Mobile Telecommunications-2000 (IMT-2000)".
3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
BCH Broadcast Channel
CCPCH Common Control Physical Channel
DCH Dedicated Channel
DPCCH Dedicated Physical Control Channel
DPCH Dedicated Physical Channel
DPDCH Dedicated Physical Data Channel
FACH Forward Access Channel
FSW Frame Synchronization Word
PRACH Physical Random Access Channel
RACH Random Access Channel
SCH Synchronization Channel
SIR Signal-to-Interference Ratio
TPC Transmit Power Control
UE User Equipment
4 Synchronization procedures
4.1 Initial satellite search
During cell search, the UE searches for a satellite and determines the downlink scrambling code and common channel
frame synchronization of that satellite beam. A typical initial satellite beam search is described in annex A.
4.2 Common physical channel synchronization
The radio frame timing of all common physical channels can be determined after cell search. The P-CCPCH radio
timing is found during cell search and the radio frame timings of all common physical channels are related to that
timing as described in [1].
4.3 DPCCH/DPDCH synchronization
4.3.1 Synchronization primitives
4.3.1.1 General
For the dedicated channels, synchronization primitives are used to indicate the synchronization status of radio links,
both in uplink and downlink. The definition of the primitives is given in the following clauses.
ETSI

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8 ETSI TS 101 851-4-2 V2.1.1 (2008-01)
4.3.1.2 Downlink synchronization primitives
Layer 1 in the UE shall every radio frame check synchronization status of the downlink-dedicated channels.
Synchronization status is indicated to higher layers using the CPHY-Sync-IND and CPHY-Out-of-Sync-IND
primitives.
Out-of-sync shall be reported using the CPHY-Out-of-Sync-IND primitive if either of the following criteria is fulfilled:
- the UE estimates the DPCCH quality over the last 200 ms period to be worse than a threshold Q . This
out
criterion shall never be fulfilled during the first 200 ms of the dedicated channel's existence. Q is defined
out
implicitly by the relevant tests in [7];
- the last 20 transport blocks, as observed on all TrCHs using CRC, are received with incorrect CRC. In
addition, over the last 200 ms, no transport block has been received with correct CRC.
In-sync shall be reported using the CPHY-Sync-IND primitive if both of the following criteria are fulfilled:
- the UE estimates the DPCCH quality over the last 200 ms period to be better than a threshold Q . This
in
criterion shall always be fulfilled during the first 200 ms of the dedicated channel's existence. Q is defined
in
implicitly by the relevant tests in [7];
- at least one transport block, as observed on all TrCHs using CRC, is received with correct CRC. If there is no
TrCH using CRC, this criterion is always fulfilled.
How the primitives are used by higher layers is described in [6].
4.3.1.3 Uplink synchronizati
...