ETSI TS 102 744-3-9 V1.1.1 (2015-10)
Satellite Earth Stations and Systems (SES); Family SL Satellite Radio Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 9: Initiation and Operation of User Plane
Satellite Earth Stations and Systems (SES); Family SL Satellite Radio Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 9: Initiation and Operation of User Plane
DTS/SES-00299-3-9
Satelitske zemeljske postaje in sistemi (SES) -?? SL satelitski radijski vmesnik (izdaja 1) - 3.del: Nadzor ravnine in uporaba ravninske specifikacije - 9.poddel: Uvajanje in delovanje ??
General Information
Standards Content (Sample)
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 9: Initiation and Operation of User Plane
2 ETSI TS 102 744-3-9 V1.1.1 (2015-10)
Reference
DTS/SES-00299-3-9
Keywords
3GPP, GPRS, GSM, GSO, interface, MSS,
radio, satellite, TDM, TDMA, UMTS
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ETSI
3 ETSI TS 102 744-3-9 V1.1.1 (2015-10)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 6
Introduction . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 8
3 Symbols and abbreviations . 8
3.1 Symbols . 8
3.2 Abbreviations . 8
4 User Plane Operation. 8
4.0 Overview . 8
4.1 Outline of Circuit Switched User Plane . 10
4.1.0 General . 10
4.1.1 Architecture . 10
4.1.2 Functions . 11
4.1.3 Services . 11
4.1.3.1 Services Provided to Upper Layers . 11
4.1.3.2 Services Expected from Bearer Connection Layer . 11
4.1.4 Elements for layer-to-layer communication . 11
4.1.4.0 General . 11
4.1.4.1 Control Plane Primitives between the CSH layer and adaptation layer . 12
4.1.4.2 Control Plane Primitives between CSH and Call Control Layer . 13
4.1.4.3 User Plane Primitives between CSH and upper/lower layers . 14
4.1.4.4 Return Direction BCt User Plane Maintenance Bursts Prior to CC:Connect Message . 14
5 CS User Plane for the 4 kbit/s Voice Service . 14
5.1 General Architecture . 14
5.1.0 Overview . 14
5.1.1 Configuration . 16
5.2 CS User Plane Handler (VCSH) for satellite optimized low data rate codec - UE Side . 16
5.2.1 Services Provided to Upper Layers . 16
5.2.1.0 General . 16
5.2.1.1 Service Primitives at VC-SAP . 16
5.2.2 Services Expected from Lower Layers . 17
5.2.2.0 General . 17
5.2.2.1 Service Primitives at TM-SAP . 17
5.2.3 VCSH [UE] Architecture and Behaviour . 17
5.2.3.0 General . 17
5.2.3.1 [UE] Transmit Behaviour [Return] . 18
5.2.3.2 [UE] Receive Behaviour [Forward] . 19
5.3 Circuit Switched User Plane Handler for Satellite Optimized Low Data Rate Codec - RNC Side . 19
5.3.1 Services Provided to Upper Layers . 19
5.3.1.0 General . 19
5.3.1.1 Service Primitives at RL-SAP [RNC] . 20
5.3.2 Services Expected from Lower Layers . 20
5.3.2.0 General . 20
5.3.2.1 Service Primitives at TM-SAP . 20
5.3.3 VCSH [RNC] Architecture and Behaviour . 21
5.3.3.1 Iu UP Configuration . 21
5.3.3.2 [RNC] Transmit Behaviour [Forward] . 21
5.3.3.3 [RNC] Receive Behaviour [Return] . 22
5.4 Codec Type Signalling for Satellite Optimized Low Data Rate Voice Codec . 23
5.4.1 Call Control Protocol Supported Codec Information Element . 23
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4 ETSI TS 102 744-3-9 V1.1.1 (2015-10)
5.4.2 NAS Synchronization Indicator - Satellite Optimized Low Data Rate Voice Codec . 25
5.5 DTMF Transmission . 25
6 CS User Plane for the 64 kbit/s Synchronous Circuit Switched Service . 25
6.1 General Architecture . 25
6.2 64 kbit/s CS User Plane Handler (BCSH) - UE Side . 27
6.2.1 64 kbit/s BCSH Services Provided to Upper Layers [UE] . 27
6.2.1.0 General . 27
6.2.1.1 64 kbit/s CS Service Primitives at HL-SAP [UE] . 27
6.2.2 64 kbit/s CS Service, Services Expected from Lower Layers [UE] . 27
6.2.2.0 General . 27
6.2.2.1 64 kbit/s CS Service Primitives at TM-SAP [UE] . 28
6.2.3 64 kbit/s BCSH [UE] Architecture and Behaviour . 28
6.2.3.0 General . 28
6.2.3.1 64 kbit/s [UE] Transmit Behaviour [Return] . 28
6.2.3.2 64 kbit/s [UE] Receive Behaviour [Forward] . 29
6.3 64 kbit/s CS User Plane Handler (BCSH) - RNC Side . 29
6.3.1 64 kbit/s Services Provided to Upper Layers [RNC] . 29
6.3.1.0 General . 29
6.3.1.1 64 kbit/s Service Primitives at RL-SAP [RNC] . 29
6.3.2 64 kbit/s Services Expected from Lower Layers [RNC]. 29
6.3.2.0 General . 29
6.3.2.1 64 kbit/s Service Primitives at TM-SAP [RNC] . 30
6.3.3 64 kbit/s BCSH [RNC] Architecture and Behaviour . 30
6.3.3.1 Iu UP Configuration . 30
6.3.3.2 64 kbit/s [RNC] Transmit Behaviour [Forward] . 30
6.3.3.3 64 kbit/s [RNC] Receive Behaviour [Return] . 30
6.4 Plesiochronous and Transmission Schedule Buffer Considerations . 31
6.4.0 General . 31
6.4.1 Plesiochronous/transmission schedule Buffer Requirements at the UE . 31
6.4.2 Plesiochronous/transmission schedule Buffer Requirements at the RNC . 31
6.5 Discontinuous Transmission (DTX) for 64 kbit/s Service . 32
6.5.1 General Introduction . 32
6.5.2 64 kbit/s DTX - Mandatory and Optional Requirements . 32
6.5.3 Enabling/Disabling and Selecting DTX algorithm . 32
6.5.4 Terminology . 32
6.5.5 Choosing the appropriate DTX algorithm . 32
6.5.6 DTX for 64 kbit/s UDI Service - Data Activated DTX Algorithm . 33
6.5.7 DTX for 3,1 kHz Audio Services - Voice Activated DTX algorithm . 34
6.5.8 Maintenance Burst for 64 kbit/s DTX (UDI and 3,1 kHz Audio) . 34
6.5.9 Behaviour for CSH and DTX Algorithm Selection for 64 kbit/s CS Bearer . 35
7 Packet Switched User Plane . 35
7.0 Overview . 35
7.1 PDCP Protocol . 35
7.1.0 General . 35
7.1.1 Disabling of IP Header Compression Per Connection . 36
7.1.1.0 General . 36
7.1.1.1 RNC Behaviour (Mandatory) . 36
7.1.1.2 UE Behaviour (Optional) . 36
7.1.2 PDCP Behaviour for operation with BM domain . 36
7.2 TFT Handler . 36
7.2.1 UE User Plane Protocol Stack Overview . 36
7.2.2 TFT Based Compression Approach . 37
7.2.2.0 General . 37
7.2.2.1 IPv4 operation . 37
7.2.2.1.1 IP Version . 37
7.2.2.1.2 IHL . 38
7.2.2.1.3 ToS (/DSCP) . 38
7.2.2.1.4 Total Length . 38
7.2.2.1.5 Identification . 38
7.2.2.1.6 Flags/Fragment Offset . 38
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5 ETSI TS 102 744-3-9 V1.1.1 (2015-10)
7.2.2.1.7 TTL . 38
7.2.2.1.8 Protocol . 38
7.2.2.1.9 Header Checksum . 38
7.2.2.1.10 Source Address . 38
7.2.2.1.11 Destination Address . 39
7.2.2.1.12 Source Port . 39
7.2.2.1.13 Destination Port . 39
7.2.2.1.14 UDP Length . 39
7.2.2.1.15 UDP CRC . 39
7.2.2.1.16 SPI . 39
7.2.2.1.17 Padding . 39
7.2.2.2 IPv6 operation . 39
7.2.2.2.1 IP Version . 39
7.2.2.2.2 Traffic Class . 40
7.2.2.2.3 Flow Label . 40
7.2.2.2.4 Payload Length . 40
7.2.2.2.5 Next Header . 40
7.2.2.2.6 Hop Limit . 40
7.2.2.2.7 Source Address . 40
7.2.2.2.8 Destination Address . 40
7.2.2.2.9 Source Port . 40
7.2.2.2.10 Destination Port . 40
7.2.2.2.11 UDP Length . 40
7.2.2.2.12 UDP CRC . 41
7.2.2.2.13 SPI . 41
7.2.2.2.14 Padding . 41
Annex A (normative): Circuit Switched Call type - Supported Bearer Capability
Information Element . 42
A.1 Introduction . 42
A.2 4 kbit/s Speech Telephony Service [CircuitSwitchedCallType = 'type-4kbits-speech'] . 42
A.3 PCM Coded 64 kbit/s Service [CircuitSwitchedCallType = 'type-3pt1khz-audio'] . 42
A.4 64 kbit/s UDI Service [CircuitSwitchedCallType = 'type-udi-isdn'] . 42
A.5 56 kbit/s RDI Service (also 56 kbit/s UDI with V.110 Rate Adaptation) [CircuitSwitchedCallType
= 'type-rdi-isdn'] . 42
Annex B (normative): Circuit Switched Bearer Capability for Satellite Network Specific
PCM Coded 64 kbit/s Bearer Service. 44
B.1 Introduction . 44
B.2 Support of PCM coded Fax, Data and Speech . 44
B.3 64 kbit/s Bearer Service in UMTS . 44
B.4 Bearer Capability for 64 kbit/s Bearer Service using ITC = 3,1 kHz . 45
Annex C (normative): Circuit Switched Signalling of Information Transfer Capability to
the External (PSTN/ISDN) Network and Terminal Equipment (TE)
Attached to the User Terminal . 47
C.1 Distinguishing between Speech, UDI/RDI and 3,1 kHz Audio . 47
History . 50
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6 ETSI TS 102 744-3-9 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 9 of a multi-part deliverable. Full details of the entire series can be found in
ETSI TS 102 744-1-1 [10].
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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7 ETSI TS 102 744-3-9 V1.1.1 (2015-10)
1 Scope
The present document defines the necessary control plane behaviour for instantiation and initiation of the User Plane
entities, and also describes the operation of the User Plane entities for 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 124 008: "Digital cellular telecommunications system (Phase 2+) (GSM); Universal
Mobile Telecommunications System (UMTS); Mobile radio interface Layer 3 specification; Core
network protocols; Stage 3 (3GPP TS 24.008 Release 4)".
[2] ETSI TS 126 103: "Universal Mobile Telecommunications System (UMTS); Speech Codec List
for GSM and UMTS (3GPP TS 26.103 Release 4)".
[3] ETSI TS 123 014: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Support of Dual Tone Multi Frequency (DTMF) signalling
(3GPP TS 23.014 Release 4)".
[4] ETSI TS 125 415: "Universal Mobile Telecommunications System (UMTS); UTRAN Iu Interface
User Plane Protocols (3GPP TS 25.415 Release 4)".
[5] ETSI TS 124 007: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Mobile radio interface signalling layer 3; General Aspects
(3GPP TS 24.007 Release 4)".
[6] ETSI TS 125 323: "Universal Mobile Telecommunications System (UMTS); Packet Data
Convergence Protocol (PDCP) specification (3GPP TS 25.323 Release 4)".
[7] ETSI TS 127 007: "Digital cellular telecommunications system (Phase 2+) (GSM); Universal
Mobile Telecommunications System (UMTS); AT command set for User Equipment (UE)
(3GPP TS 27.007 Release 4)".
[8] ETSI TS 127 001: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); General on Terminal Adaptation Functions (TAF) for
Mobile Stations (MS) (3GPP TS 27.001 Release 4)".
[9] ETSI TS 122 002: "Digital cellular telecommunications system (Phase 2+) (GSM); Universal
Mobile Telecommunications System (UMTS); Circuit Bearer Services (BS) supported by a Public
Land Mobile Network (PLMN) (3GPP TS 22.002 Release 4)".
[10] 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".
[11] 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".
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8 ETSI TS 102 744-3-9 V1.1.1 (2015-10)
[12] ETSI TS 102 744-3-2: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 2: Bearer
Control Layer Operation".
[13] 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".
[14] ETSI TS 102 744-3-5: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 5: Adaptation
Layer Interface".
[15] ETSI TS 102 744-3-6: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 6: Adaptation
Layer Operation".
[16] ETSI TS 102 744-3-8: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 8: NAS Layer
and User Plane Operation for MBMS Services".
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] IETF RFC 2507: "IP Header Compression".
[i.2] IETF RFC 3095: "RObust Header Compression (ROHC): Framework and four profiles: RTP,
UDP, ESP, and uncompressed".
[i.3] IETF RFC 2508: "Compressing IP/UDP/RTP Headers for Low-Speed Serial Links".
[i.4] ETSI TR 123 910: "Digital cellular telecommunications system (Phase 2+) (GSM); Universal
Mobile Telecommunications System (UMTS); Circuit Switched Data Bearer Services
(3GPP TR 23.910 Release 4)".
3 Symbols and abbreviations
3.1 Symbols
For the purposes of the present document, the symbols given in clause 3 of ETSI TS 102 744-1-4 [11] apply.
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in clause 3 of ETSI TS 102 744-1-4 [11] apply.
4 User Plane Operation
4.0 Overview
The present document specifies the behaviour of the User Plane in both the RNC and UE and covers the following:
• the provision of a circuit switched (CS) 4 kbit/s voice service using a satellite optimized low data rate voice
codec;
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9 ETSI TS 102 744-3-9 V1.1.1 (2015-10)
• the provision of a circuit switched (CS) 64 kbit/s Unrestricted Digital Information (UDI)/Restricted Digital
Information (RDI)/3,1 kHz audio service (BS 30); and
• the provision of a packet switched (PS) service employing the Packet Data Convergence Protocol (PDCP).
The present document also covers the elements of the Call Control signalling related to the provision of the above
circuit switched services.
Figure 4.1 and Figure 4.2 illustrate the CS and PS User Plane stack architectures.
Figure 4.1: Circuit Switched User Plane Protocol Stack Layering showing NAS Layer Entities
IP
IP
TFT Handler TFT Handler
Non-Access Stratum
RELAY
PDCP PDCP GTP-U GTP-U
BCn BCn
BCt BCt
L1 L1
Access Stratum
UE RNC CN
U I
sl u
Figure 4.2: Packet Switched User Plane Protocol Stack Layering
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10 ETSI TS 102 744-3-9 V1.1.1 (2015-10)
4.1 Outline of Circuit Switched User Plane
4.1.0 General
The circuit switched user plane makes use of the CSH (Circuit Switched Handler) to provide services to the Non Access
Stratum at the UE or the Relay function at the RNC. CSH is a satellite network specific sublayer and is specified in this
and following clauses.
4.1.1 Architecture
Figure 4.3 shows the architecture of the CSH layer at the UE side. Figure 4.4 shows the architecture of the CSH at the
RNC side. The CSH layer consists of a CSH Manager and one data handler per CS connection. Two types of data
handler are defined.
The Adaptation Layer, a Radio Bearer Control (RBC) entity, configures the CSH sublayer through the CSH-RBC-SAP.
The CSH Manager retrieves the information required to select the appropriate data handler and DTX (discontinuous
transmission) type from the Call Control layer via the CSH-CC-SAP.
The data handlers supported by the CSH layer are:
• 4 kbit/s voice circuit switched handler (VCSH)
• 64 kbit/s circuit switched handler (BCSH)
The CSH Manager, based on the requests received from RBC and information provided from the Call Control Layer,
shall create a data handler.
The 4 kbit/s voice circuit switched data handler is described in clause 5.1 of the present document. The 64 kbit/s circuit
switched data handler is described in clause 6.1 of the present document.
User Plane
HL-SAP CSH-CC-SAP
VC-SAP
Circuit
Switched
Call Control
Handler
Circuit Switched
Circuit Switched
VCSH 4 kb/s Voice
BCSH 64 kb/s
Handler 64kbit/s
Handler 64kbit/s
Circuit Switched
Circuit Switched
Circuit
Circuit
Data Handler
Data Handler
CSH-RBC-SAP
Circuit Switched
RBC
Manager
Adaptation Layer
TM-SAP
Bearer Connection Layer
Figure 4.3: Circuit Switched Handler Layer Architecture (UE Side)
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11 ETSI TS 102 744-3-9 V1.1.1 (2015-10)
Figure 4.4: Circuit Switched Handler Layer Architecture (RNC Side)
4.1.2 Functions
The CSH Layer provides its services to the Non Access Stratum (NAS) at the UE or the relay at the Radio Network
Controller (RNC).
The CSH Layer shall perform the following functions:
• Concatenation and separation of circuit switched data frames (satellite optimized low data rate voice codec
frames or 640 bit higher layer frames for 64 kbit/s circuit switched services).
• Discontinuous transmission.
• Transfer of user data. This function is used for conveyance of data between users of CSH services.
CSH uses the services provided by the Bearer Connection sublayer.
4.1.3 Services
4.1.3.1 Services Provided to Upper Layers
The following services are provided by the CSH Layer towards the upper layers:
• Transfer of user data.
4.1.3.2 Services Expected from Bearer Connection Layer
The following services are expected from the Bearer Connection Layer:
• Transparent data transfer service.
4.1.4 Elements for layer-to-layer communication
4.1.4.0 General
The interaction between the CSH layer and other layers is described in terms of primitives where the primitives
represent the logical exchange of information and control between CSH and other layers. The primitives shall not
specify or constrain implementation.
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12 ETSI TS 102 744-3-9 V1.1.1 (2015-10)
4.1.4.1 Control Plane Primitives between the CSH layer and adaptation layer
The control primitives between the CSH layer and the adaptation layer are shown in Table 4.1 for the UE side and
Table 4.2 for the RNC side.
Table 4.1: Control Plane Primitives between the CSH Layer (CSH Manager)
and the adaptation layer RBC entity (UE side)
SAP Generic Name Parameter
_REQ _IND _RESP _CNF
CSH-RBC- CSH_RBC_CONFIG BCnID(Data-SAP), Not Not BCnID (Data-
SAP ForwardCSFramesPerPDU, Defined Defined SAP),
ReturnCSFramesPerPDU, CircuitSwitched
Ret_DTX CallType
CSH-RBC- CSH_RBC_RELEASE BCnID (Data-SAP) Not Not Not Defined
SAP Defined Defined
Table 4.2: Control Plane Primitives between CSH Layer (CSH Manager)
and the adaptation layer RBC entity (RNC side)
SAP Generic Name Parameter
_REQ _IND _RESP _CNF
CSH-RBC-SAP CSH_RBC_CONFIG BCnID (Data-SAP), Not Not Not Defined
ForwardCSFramesPerPDU, Defined Defined
ReturnCSFramesPerPDU,
Fwd_DTX,
CircuitSwitchedCallType
CSH-RBC-SAP CSH_RBC_RELEASE BCnID (Data-SAP) Not Not Not Defined
Defined Defined
Each Primitive is defined as follows:
1) CSH_RBC_CONFIG_REQ
CSH_RBC_CONFIG_REQ is used by RBC to configure a CSH entity and to assign it to the bearer connection
associated with that entity.
2) CSH_RBC_CONFIG_CNF
CSH_RBC_CONFIG_CNF is used by the CSH on the UE side to forward to RBC the
CircuitSwitchedCallType (retrieved from the CC layer) which RBC shall return with the RBC:EstablishAck to
configure the RNC side CSH Data Handler (i.e. select the CSH data handler/DTX Algorithm on the RNC side
appropriate for 4 kbit/s voice, UDI, RDI or 3,1 kHz audio services).
3) CSH_RBC_RELEASE_REQ
CSH_RBC_RELEASE_REQ is used by RBC to release a CSH entity.
The following parameters are used in the primitives:
1) BCnID (Data-SAP)
The BCn-SAP (Transparent Mode) used by CSH when communicating with the Bearer Connection (BCn)
Layer.
2) ForwardCSFramesPerPDU
The number of satellite optimized low data rate codec frames (80 bits) or higher layer 64 kbit/s frames
(640 bits) concatenated into a single CSH Protocol Data Unit (PDU) for transmission via the Bearer
Connection Layer in the forward direction.
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13 ETSI TS 102 744-3-9 V1.1.1 (2015-10)
3) ReturnCSFramesPerPDU
The number of satellite optimized low data rate codec frames (80 bits) or higher layer 64 kbit/s frames
(640 bits) concatenated into a single CSH PDU for transmission via the Bearer Connection Layer in the return
direction.
NOTE 1: The values of ForwardCSFramesPerPDU and ReturnCSFramesPerPDU are passed to the UE in the
Establish message during the Radio Access Bearer (RAB) setup. They are set independently of each
other and apply for the lifetime of the RAB (i.e. the duration of the call) only. ForwardCSFramesPerPDU
and ReturnCSFramesPerPDU have a value range of 1 to 8 frames per PDU. The values of these two
parameters are operator configurable at the RNC for the purpose of making the most efficient use of the
selected bearer type.
4) Ret_DTX
Boolean Indicating that DTX is or is not to be invoked for return direction transmission.
5) Fwd_DTX
Boolean Indicating that DTX is or is not to be invoked for forward direction transmission.
NOTE 2: Discontinuous Transmission is operator configured at the RNC. Discontinuous transmission in the
forward and return directions may be enabled independently. The DTX flags are passed from the RNC to
the UE in the RBC: Establish message during the RAB setup. The invocation of DTX applies for the
lifetime of the RAB (i.e. the duration of the call) only.
6) CircuitSwitchedCallType
The following Circuit Switched Call Types are supported:
• 4 kbit/s Speech Call using the satellite optimized low data rate voice codec (CircuitSwitchedCallType = "type-
4kbits-speech")
• 64 kbit/s Circuit for Pulse Code Modulation (PCM) coded analog modem, analog fax or high quality speech
(CircuitSwitchedCallType = "type-3pt1khz-audio")
• 64 kbit/s Circuit for Integrated Service Digital Network (ISDN) Data (CircuitSwitchedCallType = "type-
udi-isdn")
• 56 kbit/s Circuit for ISDN Data (CircuitSwitchedCallType = "type-rdi-isdn").
The mapping of Call Control Bearer Capability Information Element to CircuitSwitchedCallType is presented in
annex A.
The mechanism for determining the required circuit switched service at the border of the satellite network (i.e. terminal
equipments attached to the satellite network UE or external networks) is discussed in annex C.
The CircuitSwitchedCallType = "type-4kbits-speech" triggers the Circuit Switched Manager to invoke the data handler
for the 4 kbit/s voice circuit (VCSH) as described in clause 5.
The CircuitSwitchedCallTypes = "type-3pt1khz-audio", "type-udi-isdn" or "type-rdi-isdn" invoke the data handler for
the 64 kbit/s service (BCSH) as described in clause 6.
4.1.4.2 Control Plane Primitives between CSH and Call Control Layer
The control primitives between the CSH Manager and the Call Control layer at the UE are shown in Table 4.3.
NOTE: The Service Access Point interface to the Call Control layer, shown here, is only for the purpose of
illustrating the requirement to pass Circuit Switched Call Type information between CC and CSH and
does not specify or constrain implementation. The SAP is not specified in [1].
ETSI
14 ETSI TS 102 744-3-9 V1.1.1 (2015-10)
Table 4.3: Control Plane Primitives between CSH and the Call Control Layer (UE side)
SAP Generic Name Parameter
_REQ _IND _RESP _CNF
CSH-CC-SAP CSH_CC_CONFIG - Not Defined Not Defined CircuitSwitchedCallType
Each Primitive is defined as follows:
1) CSH_CC_CONFIG_REQ
CSH_CC_CONFIG_REQ is used by the CSH Man
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