ETSI TS 102 744-3-3 V1.1.1 (2015-10)

ETSI TS 102 744-3-3 V1.1.1 (2015-10)






TECHNICAL SPECIFICATION
Satellite Earth Stations and Systems (SES);
Family SL Satellite Radio Interface (Release 1);
Part 3: Control Plane and User Plane Specifications;
Sub-part 3: Bearer Connection Layer Interface

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2 ETSI TS 102 744-3-3 V1.1.1 (2015-10)



Reference
DTS/SES-00299-3-3
Keywords
3GPP, GPRS, GSM, GSO, interface, MSS, radio,
satellite, TDM, TDMA, UMTS
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© European Telecommunications Standards Institute 2015.
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3 ETSI TS 102 744-3-3 V1.1.1 (2015-10)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
Introduction . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Abbreviations . 5
4 Bearer Connection Interface . 6
4.1 Radio Interface Layering . 6
4.2 Bearer Connection Layer Responsibilities . 6
4.3 Bearer Connection Layer Overview . 7
4.3.0 General . 7
4.3.1 Bearer Connection Layer PDUs. 7
4.3.2 Bearer Connections . 7
4.3.3 Ciphering . 7
4.4 Conventions used in the present document . 7
4.4.1 Presentation. 7
4.4.2 "Reserved" Fields and Values . 8
4.4.3 Boolean Variables . 8
4.4.4 ASN.1 Encoding Rules . 8
5 Connection Protocol Data Unit (PDU) structure . 8
5.0 General . 8
5.1 Bearer Connection PDU (BCnPDU) . 8
5.1.0 General . 8
5.1.1 RawDataPDU . 9
5.1.2 InformationPDU . 9
5.1.3 SupervisoryPDU . 10
5.1.3.0 General . 10
5.1.3.1 ReadyReceive . 10
5.1.3.2 SelectiveReject . 11
5.1.4 NumberedPDU . 12
5.1.5 SubSegmentPDU . 12
5.2 Parameters . 13
5.2.1 BcnSegType . 13
5.2.2 BconnData . 14
5.2.2.0 General . 14
5.2.2.1 PdcpInfo . 15
5.2.3 SequenceNum . 15
5.2.4 PDULength . 15
Annex A (normative): ASN.1 . 16
History . 17

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4 ETSI TS 102 744-3-3 V1.1.1 (2015-10)
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://ipr.etsi.org).
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 part 3, sub-part 3 of a mult-part deliverable. Full details of the entire series can be found in
ETSI TS 102 744-1-1 [i.1].
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.
Introduction
This multi-part deliverable (Release 1) defines a satellite radio interface that provides UMTS services to users of mobile
terminals via geostationary (GEO) satellites in the frequency range 1 518,000 MHz to 1 559,000 MHz (downlink) and
1 626,500 MHz to 1 660,500 MHz and 1 668,000 MHz to 1 675,000 MHz (uplink).
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5 ETSI TS 102 744-3-3 V1.1.1 (2015-10)
1 Scope
The present document defines the Bearer Connection Layer (BCn) peer-to-peer interface of the Family SL satellite
radio interface between the Radio Network Controller (RNC) and the User Equipment (UE) used in the satellite
network.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 102 744-1-3: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 1: General Specifications; Sub-part 3: Satellite Radio Interface
Overview".
[2] ETSI TS 102 744-1-4: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 1: General Specifications; Sub-part 4: Applicable External
Specifications, Symbols and Abbreviations".
[3] ETSI TS 102 744-3-1: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 1: Bearer
Control Layer Interface".
[4] ETSI TS 102 744-3-4: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 4: Bearer
Connection Layer Operation".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI TS 102 744-1-1: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 1: General Specifications; Sub-part 1: Services and Architectures".
3 Abbreviations
For the purposes of the present document, the abbreviations given in ETSI TS 102 744-1-4 [2], clause 3 apply.
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6 ETSI TS 102 744-3-3 V1.1.1 (2015-10)
4 Bearer Connection Interface
4.1 Radio Interface Layering
As described in ETSI TS 102 744-1-3 [1], the satellite communication protocol is considered as a number of
communication layers, as follows:
• Adaptation Layer (AL);
• Bearer Connection Layer (BCn);
• Bearer Control Layer (BCt);
• Physical Layer (L1).
The satellite radio interface protocol stack is designed to seamlessly integrate with UMTS Non-Access Stratum entities,
such as GPRS Mobility Management (GMM) and Mobility Management (MM), residing in the Core Network (CN) and
in the upper layers of the User Equipment (UE).
The Bearer Connection Layer provides support to the Adaptation Layer, and uses the services provided by the Bearer
Control Layer, as shown in Figure 4.1. The present document defines the Bearer Connection Layer peer-to-peer
interface between the Radio Network Controller (RNC) and the UE, as shown in Figure 4.1.

Figure 4.1: Control Plane Protocol Stack Layering (Bearer Connection Layer interface highlighted)
4.2 Bearer Connection Layer Responsibilities
The function of the satellite radio interface Bearer Connection Layer is to provide a number of different data transport
services to upper layers. The Bearer Connection Layer is generic to the radio interface and is responsible for the
following:
• Queuing;
• QoS Policing;
• QoS Monitoring;
• Segmentation and Re-assembly;
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7 ETSI TS 102 744-3-3 V1.1.1 (2015-10)
• Ciphering; and
• Selectable ARQ.
The functionality of the Bearer Connection Layer is therefore similar to that of the Radio Link Control (RLC) layer in
UTRAN (UMTS Terrestrial Radio Access Network).
The Bearer Connection layer peer-peer interface definitions are described in the present document.
4.3 Bearer Connection Layer Overview
4.3.0 General
The Bearer Connection Layer performs peer-peer signalling via Bearer Connection Layer PDUs. The Bearer
Connection Layer signalling mechanisms introduce an overhead on the layer above. This overhead is kept to a
minimum.
4.3.1 Bearer Connection Layer PDUs
When registration is complete, and whenever a User Plane Connection is established, a Bearer Connection process is
established which operates an HDLC-derived mechanism for support of the transfer of information between the RNC
and the UE. This mechanis
...