ETSI TS 101 851-4-1 V2.1.1 (2008-01)

ETSI TS 101 851-4-1 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 1: G-family (S-UMTS-G 25.214)

---------------------- Page: 1 ----------------------
2 ETSI TS 101 851-4-1 V2.1.1 (2008-01)



Reference
RTS/SES-00298-4-1
Keywords
interface, MES, MSS, radio, satellite, UMTS
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2008.
All rights reserved.

TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI

---------------------- Page: 2 ----------------------
3 ETSI TS 101 851-4-1 V2.1.1 (2008-01)
Contents
Intellectual Property Rights.5
Foreword.5
Introduction .5
1 Scope.7
2 References.7
2.1 Normative references.7
2.2 Informative references.8
3 Definitions and abbreviations.8
3.1 Definitions.8
3.2 Abbreviations.8
4 Synchronization procedures.9
4.1 Spot search.9
4.2 Common physical channel synchronization .9
4.2.1 P-CCPCH radio frame timing.9
4.2.2 S-CCPCH soft combining timing .9
4.3 DPCCH/DPDCH synchronization.10
4.3.1 Synchronization primitives.10
4.3.1.1 General.10
4.3.1.2 Downlink synchronization primitives.10
4.3.1.3 Uplink synchronization primitives .11
4.3.2 Radio link establishment and physical layer reconfiguration for dedicated channels.11
4.3.2.1 General.11
4.3.2.2 Satellite gateway radio link set state machine.11
4.3.2.3 Synchronization procedure A.12
4.3.2.4 Synchronization procedure B.13
4.3.3 Radio link monitoring.13
4.3.3.1 Downlink radio link failure.13
4.3.3.2 Uplink radio link failure/restore.13
4.3.4 Transmission timing adjustments .14
5 Power control.14
5.1 Uplink power control.14
5.1.1 PRACH.14
5.1.1.1 General.14
5.1.1.2 Setting of PRACH control and data part power difference .14
5.1.2 DPCCH/DPDCH.14
5.1.2.1 General.14
5.1.2.2 Ordinary transmit power control.15
5.1.2.2.1 General.15
5.1.2.2.2 Algorithm 1 for processing TPC commands .16
5.1.2.2.3 Algorithm 2 for processing TPC commands .17
5.1.2.3 Transmit power control in compressed mode .18
5.1.2.4 Transmit power control in the uplink DPCCH power control preamble.20
5.1.2.5 Setting of the uplink DPCCH/DPDCH power difference .21
5.1.2.5.1 General.21
5.1.2.5.2 Signalled gain factors.21
5.1.2.5.3 Computed gain factors.21
5.1.2.5.4 Setting of the uplink DPCCH/DPDCH power difference in compressed mode.22
5.1.2.6 Maximum and minimum power limits.22
5.2 Downlink power control.23
5.2.1 DPCCH/DPDCH.23
5.2.1.1 General.23
5.2.1.2 Ordinary transmit power control.23
5.2.1.2.1 UE behaviour.23
ETSI

---------------------- Page: 3 ----------------------
4 ETSI TS 101 851-4-1 V2.1.1 (2008-01)
5.2.1.2.2 USRAN behaviour.24
5.2.1.3 Power control in compressed mode .25
5.2.1.4 Spot selection diversity transmit power control .26
5.2.1.4.1 General.26
5.2.1.4.2 TPC procedure in UE .27
5.2.1.4.3 Selection of primary spot.27
5.2.1.4.4 Delivery of primary spot ID .27
5.2.1.4.5 TPC procedure in the network.28
5.2.1.5 Open Loop power control .29
5.2.2 AICH.29
5.2.3 PICH.29
5.2.4 S-CCPCH.29
5.2.5 MICH.29
6 Random access procedure .29
6.1 Physical random access procedure .29
6.1.1 RACH sub-channels.31
6.1.2 RACH access slot sets .31
Annex A (informative): Power control .32
A.1 Downlink power control timing .32
Annex B (informative): Spot search procedure.33
Annex C (informative): Bibliography.34
History .35

ETSI

---------------------- Page: 4 ----------------------
5 ETSI TS 101 851-4-1 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 G at ITU-R, in the frame of
the modification of ITU-R Recommendation M.1457 [13]. This modification has been approved at SG8 meeting in
November 2005.
The present document is part 4, sub-part 1 of a multi-part deliverable covering Satellite Earth Stations and Systems
(SES); Satellite Component of UMTS/IMT-2000; G-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

---------------------- Page: 5 ----------------------
6 ETSI TS 101 851-4-1 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, etc.) 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.
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

---------------------- Page: 6 ----------------------
7 ETSI TS 101 851-4-1 V2.1.1 (2008-01)
1 Scope
The present document specifies the characteristics of the physical layer procedures used for family G of the satellite
component of UMTS (S-UMTS-G).
It is based on the FDD mode of UTRA defined by TS 125 211 [4], TS 125 212 [9], TS 125 213 [10], TS 125 215 [11],
TS 125 214 [5], TS 125 331 [12] and TS 125 433 [6] 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 101 851-1-1: "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 1: G-family (S-UMTS-G 25.211)".
[2] ETSI TS 101 851-2-1: "Satellite Earth Stations and Systems (SES); Satellite Component of
UMTS/IMT-2000; Part 2: Multiplexing and channel coding; Sub-part 1: G-family
(S-UMTS-G 25.212)".
[3] ETSI TS 101 851-3-1: "Satellite Earth Stations and Systems (SES); Satellite Component of
UMTS/IMT-2000; Part 3: Spreading and modulation; Sub-part 1: G-family (S-UMTS-G 25.213)".
[4] ETSI TS 125 211: "Universal Mobile Telecommunications System (UMTS); Physical channels
and mapping of transport channels onto physical channels (FDD) (3GPP TS 25.211)".
[5] ETSI TS 125 214: "Universal Mobile Telecommunications System (UMTS); Physical layer
procedures (FDD) (3GPP TS 25.214)".
[6] ETSI TS 125 433: "Universal Mobile Telecommunications System (UMTS); UTRAN Iub
interface Node B Application Part (NBAP) signalling (3GPP TS 25.433)".
ETSI

---------------------- Page: 7 ----------------------
8 ETSI TS 101 851-4-1 V2.1.1 (2008-01)
[7] ETSI TS 125 101: "Universal Mobile Telecommunications System (UMTS); User Equipment
(UE) radio transmission and reception (FDD) (3GPP TS 25.101)".
[8] ETSI TS 125 133: "Universal Mobile Telecommunications System (UMTS); Requirements for
support of radio resource management (FDD) (3GPP TS 25.133)".
2.2 Informative references
[9] ETSI TS 125 212: "Universal Mobile Telecommunications System (UMTS); Multiplexing and
channel coding (FDD) (3GPP TS 25.212)".
[10] ETSI TS 125 213: "Universal Mobile Telecommunications System (UMTS); Spreading and
modulation (FDD) (3GPP TS 25.213)".
[11] ETSI TS 125 215: "Universal Mobile Telecommunications System (UMTS); Physical layer;
Measurements (FDD) (3GPP TS 25.215)".
[12] ETSI TS 125 331: "Universal Mobile Telecommunications System (UMTS); Radio Resource
Control (RRC); Protocol specification (3GPP TS 25.331)".
[13] ITU-R Recommendation M.1457 (2006): "Detailed specifications of the radio interfaces of
International Mobile Telecommunications-2000 (IMT-2000)".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
L1 combining period: interval of contiguous radio frames when S-CCPCH clusters may be soft combined
S-CCPCH cluster: one or more S-CCPCHs on different RLs, all containing identical physical channel bits
NOTE: S-CCPCHs in an S-CCPCH cluster are synchronized such that the delay between the earliest and latest
arriving S-CCPCH at the UE is no more than 296 chips.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AICH Acquisition Indicator CHannel
ASC Access Service Class
BCH Broadcast CHannel
CCPCH Common Control Physical CHannel
CCTrCH Coded Composite Transport CHannel
CPICH Common PIlot CHannel
CRC Cyclic Redundancy Check
DL DownLink
DPCCH Dedicated Physical Control CHannel
DPCH Dedicated Physical CHannel
DPDCH Dedicated Physical Data CHannel
DTX Discontinuous Transmission
GEO Geostationary Earth Orbit
LEO Low Earth Orbit
MEO Medium Earth Orbit
MICH MBMS Indicator CHannel
MSS Mobile Satellite Services
PCA Power Control Algorithm
P-CCPCH Primary Common Control Physical CHannel
ETSI

---------------------- Page: 8 ----------------------
9 ETSI TS 101 851-4-1 V2.1.1 (2008-01)
P-CPICH Primary Common PIlot CHannel
PICH Paging Indicator CHannel
PRACH Physical Random Access CHannel
RACH Random Access CHannel
RAT Radio Access Technology
RL Radio Link
RPL Recovery Period Length
RSCP Received Signal Code Power
S-CCPCH Secondary Common Control Physical CHannel
SCH Synchronization CHannel
SFN System Frame Number
SIR Signal-to-Interference Ratio
SSDT Site Selection Diversity TPC
TFC Transport Format Combination
TFCI Transport Frame Combination Indicator
TPC Transmit Power Control
TTI Transmission Time Interval
UE User Equipment
UL UpLink
USRAN UMTS Satellite Radio Access Network
UTRA UMTS Terrestrial Radio Access
4 Synchronization procedures
4.1 Spot search
During the spot search, the UE searches for a satellite beam and determines the downlink scrambling code and common
channel frame synchronization of that satellite beam. How spot search is typically done is described in annex B.
4.2 Common physical channel synchronization
The radio frame timing of all common physical channels can be determined after spot search.
4.2.1 P-CCPCH radio frame timing
The P-CCPCH radio frame timing is found during spot search and the radio frame timing of all common physical
channel are related to that timing as described in TS 101 851-1-1 [1].
4.2.2 S-CCPCH soft combining timing
Higher layers will provide additional timing information when S-CCPCH clusters can be soft combined. The timing
information allows the UE to determine the L1 combining period that applies to each S-CCPCH cluster. The
information also identifies the S-CCPCHs and the RLs in each cluster as well as which S-CCPCH clusters can be soft
combined. The set of S-CCPCH clusters that can be combined does not change during an L1 combining period. When
S-CCPCH clusters can be soft combined, all S-CCPCHs in the clusters shall contain identical bits in their data fields,
although the TFCI fields of S-CCPCH in different clusters may be different. (TFC detection when S-CCPCH clusters
may be soft combined is discussed in TS 101 851-2-1 [2].) An L1 combining period shall contain only complete TTIs.
The maximum delay between S-CCPCH clusters that the UE may combine is set by UE performance requirements.
ETSI

---------------------- Page: 9 ----------------------
10 ETSI TS 101 851-4-1 V2.1.1 (2008-01)
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.
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.
The criteria for reporting synchronization status are defined in two different phases.
The first phase starts when higher layers initiate physical dedicated channel establishment (as described in
TS 125 331 [12]) or whenever the UE initiates synchronization procedure A (as described in clause 4.3.2.1) and lasts
until 160 ms after the downlink dedicated channel is considered established by higher layers (physical channel
establishment is defined in TS 125 331 [12]). During this time out-of-sync shall not be reported and in-sync shall be
reported using the CPHY-Sync-IND primitive if the following criterion is fulfilled:
- The UE estimates the DPCCH quality over the previous 40 ms period to be better than a threshold Q . This
in
criterion shall be assumed not to be fulfilled before 40 ms of DPCCH quality measurements have been
collected. Q is defined implicitly by the relevant tests in TS 125 101 [7].
in
The second phase starts 160 ms after the downlink dedicated channel is considered established by higher layers. During
this phase both out-of-sync and in-sync are reported as follows.
Out-of-sync shall be reported using the CPHY-Out-of-Sync-IND primitive if any of the following criteria is fulfilled:
- The UE estimates the DPCCH quality over the previous 160 ms period to be worse than a threshold Q .
out
Q is defined implicitly by the relevant tests in TS 125 101 [7].
out
- The 20 most recently received transport blocks with a non-zero length CRC attached, as observed on all
TrCHs using non-zero length CRC, have been received with incorrect CRC. In addition, over the previous
160 ms, all transport blocks with a non-zero length CRC attached have been received with incorrect CRC. In
case no TFCI is used this criterion shall not be considered for the TrCH(s) not using guided detection if they
do not use a non-zero length CRC in all transport formats. If no transport blocks with a non-zero length CRC
attached are received over the previous 160 ms this criterion shall not be assumed to be fulfilled.
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 previous 160 ms period to be better than a threshold Q .
in
Q is defined implicitly by the relevant tests in TS 125 101 [7].
in
- At least one transport block with a non-zero length CRC attached, as observed on all TrCHs using non-zero
length CRC, is received in a TTI ending in the current frame with correct CRC. If no transport blocks are
received, or no transport block has a non-zero length CRC attached in a TTI ending in the current frame and in
addition over the previous 160 ms at least one transport block with a non-zero length CRC attached has been
received with a correct CRC, this criterion shall be assumed to be fulfilled. If no transport blocks with a non-
zero length CRC attached are received over the previous 160 ms this criterion shall also be assumed to be
fulfilled. In case no TFCI is used this criterion shall not be considered for the TrCH(s) not using guided
detection if they do not use a non-zero length CRC in all transport formats.
How the primitives are used by higher layers is described in TS 125 331 [12]. The above definitions may lead to radio
frames where neither the in-syn
...