ETSI TS 136 509 V14.7.0 (2020-01)

TECHNICAL SPECIFICATION
LTE;
Evolved Universal Terrestrial Radio Access (E-UTRA)
and Evolved Packet Core (EPC);
Special conformance testing functions
for User Equipment (UE)
(3GPP TS 36.509 version 14.7.0 Release 14)

3GPP TS 36.509 version 14.7.0 Release 14 1 ETSI TS 136 509 V14.7.0 (2020-01)

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RTS/TSGR-0536509ve70
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ETSI
3GPP TS 36.509 version 14.7.0 Release 14 2 ETSI TS 136 509 V14.7.0 (2020-01)
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Legal Notice
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
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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.
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3GPP TS 36.509 version 14.7.0 Release 14 3 ETSI TS 136 509 V14.7.0 (2020-01)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 6
Introduction . 6
1 Scope . 7
2 References . 7
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 9
4 UE special conformance test functions . 10
4.1 General description. 10
4.2 Requirements for UE support of test functions . 10
5 Test Control (TC) protocol procedures and test loop operation . 10
5.1 General description. 10
5.2 Security protection of test control messages . 29
5.3 UE test mode procedures . 29
5.3.1 General . 29
5.3.2 Activate UE test mode . 30
5.3.2.1 General . 30
5.3.2.2 Initiation . 31
5.3.2.3 Reception of ACTIVATE TEST MODE message or AT Command +CATM by UE . 31
5.3.3 Deactivate UE test mode . 32
5.3.3.1 General . 33
5.3.3.2 Initiation . 33
5.3.3.3 Reception of DEACTIVATE TEST MODE message or AT Command +CATM by UE . 33
5.4 UE test loop procedures . 34
5.4.1 General . 34
5.4.2 Close UE test loop . 34
5.4.2.1 General . 35
5.4.2.1a UE test loop mode A PDCP SDU and UE test loop mode B IP PDU buffer size requirement . 36
5.4.2.1b UE test loop mode G and UE test loop mode H buffer size, User data container size and TP-
User-Data buffer size requirements . 36
5.4.2.2 Initiation . 37
5.4.2.3 Reception of CLOSE UE TEST LOOP message by the UE . 37
5.4.2.4 Reception of AT Command +CCUTLE by the UE. 43
5.4.3 UE test loop mode A operation . 44
5.4.4 UE test loop mode B operation . 46
5.4.4.1 Void. 46
5.4.4.2 Reception of IP PDUs when UE is in E-UTRA or NB-IoT mode . 46
5.4.4.3 Expiry of T_delay_modeB timer when UE is in E-UTRA or NB-IoT mode . 46
5.4.4.4 Reception of IP PDUs when UE is in UTRA mode . 46
5.4.4.5 Expiry of T_delay_modeB timer when UE is in UTRA mode . 47
5.4.4.6 Reception of IP PDUs when UE is in GSM/GPRS mode . 47
5.4.4.7 Expiry of T_delay_modeB timer when UE is in GSM/GPRS mode. 47
5.4.4.8 Reception of IP PDUs when UE is in CDMA2000 mode . 47
5.4.4.9 Expiry of T_delay_modeB timer when UE is in CDMA2000 mode . 48
5.4.4.10 Establishment of the RRC/RR connection in E-UTRA, NB-IoT, UTRA, GSM/GPRS and
CDMA2000 mode . 48
5.4.4.11 Release of RRC/RR connection in E-UTRA, NB-IoT, UTRA, GSM/GPRS and CDMA2000
mode after T_delay_modeB timer has expired . 48
5.4.4a UE test loop mode C operation . 48
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5.4.4a.1 Reception of MBMS packets . 48
5.4.4a.2 Release of RRC connection. 49
5.4.4b UE test loop mode D operation . 49
5.4.4b.1 Monitor or Announce ProSe Direct Discovery . 49
5.4.4b.2 Release of RRC connection. 50
5.4.4c UE test loop mode E operation . 50
5.4.4c.1 Receive or Transmit ProSe Direct or V2X Communication . 50
5.4.4c.2 Release of RRC connection. 52
5.4.4c.3 Transition from RRC Idle/Connected to Any Cell Selection state . 52
5.4.4c.4 V2X operation . 52
5.4.4d UE test loop mode F operation . 53
5.4.4d.1 Reception of MBMS packets . 53
5.4.4d.2 Release of RRC connection. 53
5.4.4e UE test loop mode G operation . 53
5.4.4e.1 Reception of ESM DATA TRANSPORT message . 53
5.4.4e.2 Expiry of T_delay_modeGH timer when UE test loop mode G is active . 54
5.4.4f UE test loop mode H operation . 54
5.4.4f.1 Reception of TPDU . 54
5.4.4f.2 Expiry of T_delay_modeGH timer when UE test loop mode H is active . 55
5.4.4g UE test loop mode I operation . 56
5.4.4g.1 Reception of ESM DATA TRANSPORT message . 56
5.4.5 Open UE test loop . 56
5.4.5.1 General . 56
5.4.5.2 Initiation . 56
5.4.5.3 Reception of OPEN UE TEST LOOP message or AT Command +CCUTLE by the UE . 56
5.5 UE Positioning test mode procedures . 57
5.5.1 Reset UE Positioning Stored Information . 57
5.5.1.1 General . 57
5.5.1.2 Initiation . 58
5.5.1.3 Reception of RESET UE POSITIONING STORED INFORMATION message by UE . 58
5.5.2 Update UE Location Information . 58
5.5.2.1 General . 59
5.5.2.2 Initiation . 59
5.5.2.3 Reception of UPDATE UE LOCATION INFORMATION message by UE . 59
5.5.3 UTC time reset . 59
5.5.3.1 General . 59
5.5.3.2 Initiation . 59
5.5.3.3 Reception of AT Command +CUTCR by UE . 59
5.6 MBMS Packet Counter reporting procedure . 60
5.6.1 Request MBMS Packet Counter value. 60
5.6.1.1 General . 60
5.6.1.2 Initiation . 60
5.6.1.3 Reception of UE TEST LOOP MODE C MBMS PACKET COUNTER REQUEST by the UE . 60
5.7 ProSe Packet Counter reporting procedure . 61
5.7.1 Request ProSe Packet Counter value . 61
5.7.1.1 General . 61
5.7.1.2 Initiation . 61
5.7.1.3 Reception of UE TEST LOOP PROSE COUNTER REQUEST by the UE . 62
5.7.1.4 Reception of AT Command +CUSPCREQ by the UE . 62
5.8 SC-PTM Packet Counter reporting procedure . 63
5.8.1 Request SC-PTM Packet Counter value . 63
5.8.1.1 General . 63
5.8.1.2 Initiation . 63
5.8.1.3 Reception of UE TEST LOOP MODE F SCPTM PACKET COUNTER REQUEST by the UE . 63
5.9 Antenna Test Function measurement procedure . 63
5.9.1 Request Antenna Information values . 64
5.9.1.1 General . 64
5.9.1.2 Initiation . 64
5.9.1.3 Reception of ANTENNA INFORMATION REQUEST by the UE . 64
5.9.2 UE ATF requirements . 65
5.9.2.1 RSAP . 65
5.9.2.2 RSARP . 65
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6 Message definitions and contents . 66
6.1 CLOSE UE TEST LOOP . 66
6.2 CLOSE UE TEST LOOP COMPLETE . 72
6.3 OPEN UE TEST LOOP . 72
6.4 OPEN UE TEST LOOP COMPLETE . 72
6.5 ACTIVATE TEST MODE . 72
6.6 ACTIVATE TEST MODE COMPLETE . 73
6.7 DEACTIVATE TEST MODE . 73
6.8 DEACTIVATE TEST MODE COMPLETE . 73
6.9 RESET UE POSITIONING STORED INFORMATION . 74
6.10 UE TEST LOOP MODE C MBMS PACKET COUNTER REQUEST . 74
6.11 UE TEST LOOP MODE C MBMS PACKET COUNTER RESPONSE . 75
6.12 UPDATE UE LOCATION INFORMATION . 75
6.13 UE TEST LOOP PROSE PACKET COUNTER REQUEST . 76
6.14 UE TEST LOOP PROSE PACKET COUNTER RESPONSE . 77
6.15 UE TEST LOOP MODE F SCPTM PACKET COUNTER REQUEST . 80
6.16 UE TEST LOOP MODE F SCPTM PACKET COUNTER RESPONSE . 80
6.17 ANTENNA INFORMATION REQUEST . 80
6.18 ANTENNA INFORMATION RESPONSE . 81
7 Variables, constants and timers . 82
7.1 State variables . 82
7.2 Constants . 84
7.3 Timers . 84
7.4 Configurable parameters . 85
8 Electrical Man Machine Interface (EMMI) . 85
9 Test application definition . 86
9.1 Definition of the UE ATF Client Application . 86
9.1.2 Message Definitions and Contents . 87
Annex A (informative): Void . 90
Annex B (informative): Change history . 91
History . 94

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Foreword
rd
This Technical Specification has been produced by the 3 Generation Partnership Project (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 the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater 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 document.
Introduction
User Equipment (UE) Test Loop functionality is a mandatory feature to support E-UTRA / EPC conformance testing. It
forms part of the core requirements and thus has a direct impact on the design of the UE.
The test methods applied in RF Conformance Test Specification TS 36.521-1 [27] and the test models used in Protocol
Conformance Test Specifications TS 36.523-1 [30] and TS 36.523-3 [32] define the corresponding UE Test Loop
functionality. The present specification describes the location of the data loop in the protocol stack as well as the
procedure and specific messages to activate/deactivate the Test Loop functionality in the UE.
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1 Scope
The present document defines for User Equipment (UE) in E-UTRA FDD or TDD mode those special functions and
their activation/deactivation methods that are required in UE for conformance testing purposes.
This document also describes the operation of these special functions for UEs supporting E-UTRA FDD or TDD mode,
when operating in UTRA FDD and TDD mode, in GSM/GPRS mode, and in CDMA2000 mode.
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. In the case of a reference to a 3GPP document (including
a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same
Release as the present document.
[1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 23.003: "Numbering, Addressing and Identification".
[3] 3GPP TS 23.122: "Non-Access-Stratum functions related to Mobile Station (MS) in idle mode".
[4] 3GPP TS 23.401: "3GPP System Architecture Evolution; GPRS enhancements for E-UTRAN
access".
[5] 3GPP TS 24.007: "Mobile radio interface signalling layer 3; General aspects".
[6] 3GPP TS 24.008: "Mobile Radio Interface Layer 3 specification; Core Network Protocols;
Stage 3".
[7] 3GPP TR 24.801: "3GPP System Architecture Evolution; CT WG1 Aspects".
[8] 3GPP TS 27.007: "AT command set for User Equipment (UE)".
[9] 3GPP TS 31.101: "UICC-Terminal Interface; Physical and Logical Characteristics".
[10] 3GPP TS 34.108: "Common Test Environments for User Equipment (UE) Conformance Testing".
[11] 3GPP TS 34.109: "Terminal logical test interface; Special conformance testing functions".
[12] 3GPP TS 34.123-1: "User Equipment (UE) conformance specification; Part 1: Protocol
conformance specification".
[13] 3GPP TS 34.123-2: "User Equipment (UE) conformance specification; Part 2: Implementation
Conformance Statement (ICS) proforma specification".
[14] 3GPP TS 34.123-3: "User Equipment (UE) conformance specification; Part 3: Abstract Test Suites
(ATS)".
[15] 3GPP TS 36.133: "Requirements for support of Radio Resource Management".
[16] 3GPP TS 36.211: "Physical Channels and Modulation".
[17] 3GPP TS 36.212: "Multiplexing and Channel Coding".
[18] 3GPP TS 36.300: "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal
Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2".
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[19] 3GPP TS 36.302: "Services provided by the physical layer for E-UTRA".
[20] 3GPP TS 36.304: "Evolved Universal Terrestrial Radio Access (EUTRA) User Equipment (UE)
Procedures in idle mode ".
[21] 3GPP TS 36.306: "Evolved Universal Terrestrial Radio Access (EUTRA) User Equipment (UE)
Radio Access capabilities ".
[22] 3GPP TS 36.321: "Evolved Universal Terrestrial Radio Access (EUTRA) Medium Access Control
(MAC) protocol specification".
[23] 3GPP TS 36.322: "Evolved Universal Terrestrial Radio Access (EUTRA) Radio Link Control
(RLC) protocol specification".
[24] 3GPP TS 36.323: "Evolved Universal Terrestrial Radio Access (EUTRA) Packet Data
Convergence Protocol (PDCP) specification".
[25] 3GPP TS 36.331: "Evolved Universal Terrestrial Radio Access (EUTRA) Radio Resource Control
(RRC) Protocol Specification".
[26] 3GPP TS 36.508: "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Packet
Core (EPC); Common test environments for User Equipment (UE); Conformance Testing".
[27] 3GPP TS 36.521-1: " Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment
(UE) conformance specification Radio transmission and reception; Part 1: Conformance Testing".
[28] 3GPP TS 36.521-2: "Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment
(UE) conformance specification Radio transmission and reception; Part 2: Implementation
Conformance Statement (ICS)".
[29] 3GPP TS 36.521-3: "Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment
(UE) conformance specification Radio transmission and reception; Part 3: Radio Resource
Management Conformance Testing".
[30] 3GPP TS 36.523-1: " Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Packet
Core (EPC); User Equipment (UE) conformance specification; Part 1: Protocol conformance
specification".
[31] 3GPP TS 36.523-2: "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Packet
Core (EPC); User Equipment (UE) conformance specification; Part 2: Implementation
Conformance Statement (ICS) proforma specification".
[32] 3GPP TS 36.523-3: " Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Packet
Core (EPC)); User Equipment (UE) conformance specification; Part 3: Abstract Test Suites
(ATS)".
[33] 3GPP TS 44.014: "Individual equipment type requirements and interworking; Special
conformance testing functions".
[34] 3GPP TS 51.010-1: "Mobile Station (MS) conformance specification; Part 1: Conformance
specification ".
[35] ISO/IEC 9646 (all parts): "Information technology - Open Systems Interconnection - Conformance
testing methodology and framework".
[36] 3GPP TS 24.301: "Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage
3".
[37] 3GPP TS 36.355: “Evolved Universal Terrestrial Radio Access (E-UTRA); LTE Positioning
Protocol (LPP)”.
[38] 3GPP TS 24.334: "Proximity-services (ProSe) User Equipment (UE) to ProSe function protocol
aspects; Stage 3".
[39] 3GPP TS 23.060: " General Packet Radio Service (GPRS); Service description; Stage 2".
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[40] 3GPP TR 36.978: “User Equipment (UE) antenna test function definition for two-stage Multiple
Input Multiple Output (MIMO) Over The Air (OTA) test method”
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in TR 21.905 [1] apply, unless specified
below:
Uni-directional Data Radio Bearer: Data radio bearer identified by a data radio bearer identifier capable to deliver
data only in downlink or uplink
Bi-directional Data Radio Bearer: Data radio bearer identified by a data radio bearer identifier capable to deliver data
in both downlink and uplink
Logical Test Interface: interface which provides the logical service to interwork and to communicate between UE and
System Simulator during the test of a UE
SS (System Simulator): test system (or equipment) that drives the test process with UE, like eNB (evolved Node B)
simulator
TC (Test Control): UE protocol entity used by the SS to control the UE specific testing functions
UE (User Equipment): user equipment as defined in [1] that is under test
User: test user, who handles the test and measurement process via the logical test interface
UE uplink Rate control entity: The UE entity in a UE supporting Control Plane CIoT EPS optimization that is
handling the UE uplink rate control of control plane messages carrying user data as specified in [36] TS 24.301 clause
6.3.8 (Serving PLMN rate control) and in [36] TS 24.301 clause 6.3.9 (APN rate control).
EMM SAP for control plane user data: The service access point to the EMM sublayer for control plane user data
handling the UE uplink rate control entity for uplink transmissions of the User data container via ESM DATA
TRANSPORT messages.
SMR SAP for control plane user data: The service access point to the SMR entity for uplink SMS user data handling
for uplink transmissions of the RP User data element in Uplink NAS Transport messages. For details on SMR entity
and SM-RP protocol see [39].
3.2 Abbreviations
For the purposes of the present document, the abbreviations specified in TR 21.905 [1] apply, with any additional
abbreviations specified below:
ATF Antenna Test Function
DRB Data Radio Bearer
EMM EPS Mobility Management
E-MBMS Evolved Multimedia Broadcast Multicast Service
ENB Evolved Node B
EPS Bearer Evolved Packet System Bearer
ESM EPS Session Management
LB Loop Back
MAC Media Access Control
MBMS Multimedia Broadcast Multicast Service
MBS Metropolitan Beacon System
MTC Main Test Component
ProSe Proximity-based Services
RAB Radio Access Bearer
RMC Reference Measurement Channel
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ROHC Robust Header Compression
SDF Service Data Flow
SMR Short Message Relay (entity)
SS System Simulator
TC Test Control
SC Single-cell
PTM point-to-multipoint
V2X Vehicle-to-Everything
4 UE special conformance test functions
4.1 General description
The SS performs activation and deactivation of the conformance test functions in the UE by sending Security Protected
NAS Layer 3 messages or AT commands. Apart from sending the appropriate deactivation command to the UE the
functions shall be deactivated by:
switching off the UE; or
by removing the USIM.
The following special UE conformance testing functions can be activated (and deactivated):
- UE test loop function;
- Electrical Man Machine Interface (EMMI).
The following Test Control (TC) procedures are used to control the UE test loop function:
- Close UE test loop;
- Open UE test loop.
4.2 Requirements for UE support of test functions
Whether or not a particular test function should be supported by the UE for facilitating the UE conformance testing is
explicitly indicated throughout the present specification. The use of the word "mandatory" in the present specification
shall be understood as a particular requirement being mandatory for performing UE conformance testing.
5 Test Control (TC) protocol procedures and test loop
operation
5.1 General description
The UE test loop function provides access to isolated functions of the UE via the radio interface without introducing
wherever possible new physical interfaces just for the reason of conformance testing.
NOTE 0: One exception from the rule above is the UE test loop mode E and UTC time reset when used for V2X
out-of-coverage test scenarios which require an additional physical interface for the transmission of AT
commands. This has been based on the assumption that V2X devices will normally provide such interface for
other than testing purposes e.g. for device configuration.
NOTE 1: It should be emphasised that the UE test loop function only describes the functional behaviour of the UE
with respect to its external interfaces; physical implementation of the UE test loop function is completely
left open to the manufacturer.
The UE test loop function is activated by transmitting the appropriate TC message to the UE, see clause 6.
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The UE test loop function can be operated in different loopback modes:
- UE test loop mode A;
- UE test loop mode B;
- UE test loop mode C;
- UE test loop mode D;
- UE test loop mode E;
- UE test loop mode F;
- UE test loop mode G;
- UE test loop mode H;
- UE test loop mode I.
UE test loop mode A provides loopback of PDCP SDUs for bi-directional data radio bearers while UE is operating in E-
UTRA or NB-IoT mode. The downlink PDCP SDUs received by the UE on each bi-directional data radio bearer are
returned on the same radio bearer regardless of the PDCP SDU contents and of the TFT of the associated EPS bearer
context [36].
UE test loop mode B provides loopback of PDCP SDUs (E-UTRA and UTRA), SNDCP PDUs (GSM/GPRS) and RLP
PDUs (CDMA2000) for bi-directional EPS bearers while UE is operated in E-UTRA, NB-IoT, UTRA, GSM/GPRS or
CDMA2000 modes. When operating in E-UTRA, NB-IoT, UTRA or GSM/GPRS then the downlink PDCP SDUs or
SNDCP PDUs received by the UE on all bi-directional data radio bearers are returned by the UE on the data radio
bearer associated with an EPS bearer context with a TFT matching the TCP/UDP/IP protocol information within the
PDCP SDU or SNDCP SDU [36]. When operating in CDMA2000 modes, the downlink RLP PDUs received by the UE
on all bi-directional data radio bearers are returned by the UE on the data radio bearer with the smallest identity,
regardless of the RLP PDU content and of the TFT of the associated EPS bearer context.
NOTE 2: When multiple PDN connections are established (or multiple Primary PDP Contexts are active), it is
assumed that different IP addresses are allocated to the UE by the SS on each PDN.
UE test loop mode C provides counting of successfully received MBMS Packets on a given MTCH while UE is
operating in E-MBMS/E-UTRA mode. For E-MBMS then one or more MTCHs are multiplexed on a MCH. MBMS
packets for a MTCH are delivered as one RLC SDU per MBMS packet segmented into one or more RLC UMD PDUs.
UE test loop mode D provides means for announcing or monitoring of ProSe Direct Discovery messages on SL-DCH,
as specified by the test loop mode D setup IE in the CLOSE UE TEST LOOP message. In particular, for discovery
monitor operation, UE test loop mode D provides counting of successfully received SL-DCH MAC SDUs while the UE
is operating in ProSe Direct Discovery/E-UTRA mode. For discovery announce operation, UE test loop mode D
provides trigger for transmission of ProSe Direct Discovery message on SL-DCH.
NOTE 3: UE test loop mode D is intended for RF/RRM testing purposes.
NOTE 4: ProSe Direct Discovery messages on the PC5 interface are delivered as one MAC SDU per ProSe Direct
Discovery message.
UE test loop mode E provides means for either transmit or receive of ProSe Direct or V2X Communication packets, as
specified by the test loop mode E setup IE in the CLOSE UE TEST LOOP message. In particular, for communication
receive operation, UE test loop mode E provides counting of successfully received STCH PDCP SDUs, PSCCH PHY
transport blocks and PSSCH PHY transport blocks while the UE is operating in ProSe Direct or V2X
Communication/E-UTRA mode. For communication transmit operation, UE test loop mode E provides trigger for
transmission of ProSe Direct or V2X Communication packets. For the V2X out-of-coverage scenarios this trigger
utilises AT commands and requires an appropriate physical interface.
NOTE 5: Void
NOTE 6: The Application trigger required to force the UE to start or stop a particular ProSe Service is out of the
scope of the test loop modes D and E.
ETSI
3GPP TS 36.509 version 14.7.0 Release 14 12 ETSI TS 136 509 V14.7.0 (2020-01)
UE test loop mode F provides counting of successfully received MBMS Packets on a given SC-MTCH while UE is
operating in SC-PTM/E-UTRA mode. For SC-PTM one SC-MTCH is transmitted on a DL-SCH. MBMS packets for a
SC-MTCH are delivered as one RLC SDU per MBMS packet segmented into one or more RLC UMD PDUs.
UE test loop mode G provides loopback of the User data container content of any received downlink ESM DATA
TRANSPORT message in uplink. The received data can be configured to be either returned via the UE EMM entity
(before the UE uplink rate control entity) or as a RLC SDU to the SRB RLC entity (SRB1bis for NB-IoT UE or to
SRB2 for E-UTRA UE). UE test loop mode G may be configured to delay the uplink loopback of user data. UE test
loop mode G may also be configured to repeat the received user data of the User data container in uplink to generate
higher data rates in uplink.
UE test loop mode H provides loopback of the TP-User-Data field (including the SMS user data) of any received
downlink TPDU (SMS-DELIVER) in uplink. The received data can be configured to be either returned via the UE SM-
TL entity or as a RLC SDU to the SRB RLC entity (SRB1bis for NB-IoT UE or to SRB2 for E-UTRA UE). UE test
loop mode H may be configured to delay the uplink loopback of SMS user data. UE test loop mode H may also be
configured to repeat the received SMS user data in uplink to generate higher data rates in uplink.
NOTE 7: UE test loop mode G and H are intended for control plane data testing for UEs supporting EPS services
with Control Plane CIoT EPS optimization.
NOTE 8: The
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