7.1.11 Licensed Assisted Access

36.523-13GPPEvolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Packet Core (EPC)Part 1: Protocol conformance specificationRelease 17TSUser Equipment (UE) conformance specification

7.1.11.1 LAA transmits common control information in PDCCH scrambled with CC-RNTI

7.1.11.1.1 Test Purpose (TP)

(1)

with { UE in E-UTRA RRC_CONNECTED state with nPUCCH-Identity-r11 configured and with a LAA Scell with frame structure type 3 activated }

ensure that {

when { LAA Scell transmits in PDCCH with DCI format 1C scrambled with CC-RNTI }

then { UE receives it and determines subframe configuration for LAA based on 4 bits }

}

7.1.11.1.2 Conformance requirements

References: The conformance requirements covered in the present TC are specified in TS 36.211 [44] clauses 4.3, , TS 36.213 [30] clause 13A and TS 36.321 [14] clause 7.1. Unless otherwise stated these are Rel-13 requirements.

…

[TS 36.211, clause 4.3]

Frame structure type 3 is applicable to LAA secondary cell operation with normal cyclic prefix only.

…

[TS 36.212, clause 5.3.3.1.4]

DCI format 1C is used for very compact scheduling of one PDSCH codeword, notifying MCCH change [6], notifying SC-MCCH change [6] , reconfiguring TDD, and LAA common information.

The following information is transmitted by means of the DCI format 1C:

If the format 1C is used for very compact scheduling of one PDSCH codeword

…

Else if the format 1C is used for notifying MCCH change

…

Else if the format 1C is used for notifying SC-MCCH change

…

Else if the format 1C is used for reconfiguring TDD

…

Else

– Subframe configuration for LAA – 4 bits as defined in section 13A of [3]

– UL duration and offset – 5 bits as defined in section 13A of [3]. The field only applies to a UE configured with uplink transmission on a LAA SCell

– PUSCH trigger B – 1 bit as defined in section 8.0 of [3]. The field only applies to a UE configured with uplink transmission on a LAA SCell

– Reserved information bits are added until the size is equal to that of format 1C used for very compact scheduling of one PDSCH codeword

…

[TS 36.213, clause 10]

If a UE is configured with a LAA Scell, the UE shall apply the procedures described in this clause assuming frame structure type 1 for the LAA Scell unless stated otherwise.

A UE is not expected to be configured with PUCCH on a LAA SCell.

[TS 36.213, clause 13A]

If a UE detects PDCCH with DCI CRC scrambled by CC-RNTI in subframe n-1 or subframe n of a LAA Scell, the UE may assume the configuration of occupied OFDM symbols in subframe n of the LAA Scell according to the ‘Subframe configuration for LAA’ field in the detected DCI in subframe n-1 or subframe n.

The ‘Subframe configuration for LAA’ field indicates the configuration of occupied OFDM symbols (i.e., OFDM symbols used for transmission of downlink physical channels and/or physical signals) in current and/or next subframe according to Table 13A-1.

If the configuration of occupied OFDM symbols for subframe n is indicated by the Subframe configuration for LAA field in both subframe n-1 and subframe n, the UE may assume that the same configuration of occupied OFDM symbols is indicated in both subframe n-1 and subframe n.

If a UE detects PDCCH with DCI CRC scrambled by CC-RNTI in subframe n, and the UE does not detect PDCCH with DCI CRC scrambled by CC-RNTI in subframe n-1, and if the number of occupied OFDM symbols for subframe n indicated by the Subframe configuration for LAA field in subframe n is less than 14, the UE is not required to receive any other physical channels in subframe n except for PDCCH with DCI format 0A/0B/4A/4B if configured.

If a UE does not detect PDCCH with DCI CRC scrambled by CC-RNTI containing ‘Subframe Configuration for LAA’ field set to other than ‘1110’ and ‘1111’ in subframe n and the UE does not detect PDCCH with DCI CRC scrambled by CC-RNTI containing ‘Subframe Configuration for LAA’ field set to other than ‘1110’ and ‘1111’ in subframe n-1, the UE is not required to use subframe n for updating CSI measurement.

The UE may detect PDCCH with DCI CRC scrambled by CC-RNTI by monitoring the following PDCCH candidates according to DCI Format 1C.

– one PDCCH candidate at aggregation level L=4 with the CCEs corresponding to the PDCCH candidate given by CCEs numbered 0,1,2,3

– one PDCCH candidate at aggregation level L=8 with the CCEs corresponding to the PDCCH candidate given by CCEs numbered 0,1,2,3,4,5,6,7

If a serving cell is a LAA Scell, and if the higher layer parameter subframeStartPosition for the Scell indicates ‘s07’, and if the UE detects PDCCH/EPDCCH intended for the UE starting in the second slot of a subframe, the UE may assume that OFDM symbols in the first slot of the subframe are not occupied, and all OFDM symbols in the second slot of the subframe are occupied,

If subframe n is a subframe in which OFDM symbols in the first slot are not occupied, the UE may assume that all the OFDM symbols are occupied in subframe n+1.

Table 13A-1: Subframe configuration for LAA in current and next subframe

Value of
‘Subframe configuration for LAA’ field in current subframe

Configuration of occupied OFDM symbols

(current subframe, next subframe)

0000

(-,14)

0001

(-,12)

0010

(-,11)

0011

(-,10)

0100

(-,9)

0101

(-,6)

0110

(-,3)

0111

(14,*)

1000

(12,-)

1001

(11,-)

1010

(10,-)

1011

(9,-)

1100

(6,-)

1101

(3,-)

1110

reserved

1111

reserved

NOTE:

  • (-, Y) means UE may assume the first Y symbols are occupied in next subframe and other symbols in the next subframe are not occupied.
  • (X,-) means UE may assume the first X symbols are occupied in current subframe and other symbols in the current subframe are not occupied.
  • (X,*) means UE may assume the first X symbols are occupied in current subframe, and at least the first OFDM symbol of the next subframe is not occupied.

If a UE is configured with a LAA SCell for UL transmissions, and the UE detects PDCCH with DCI CRC scrambled by CC-RNTI in subframe n, the UE may be configured with a ‘UL duration’ and ‘UL offset’ for subframe n according to the ‘UL duration and offset’ field in the detected DCI. The ‘UL duration and offset’ field indicates the ‘UL duration’ and ‘UL offset’ according to TS 36.213 Table 13A-2.

If the ‘UL duration and offset’ field configures an ‘UL offset’ and an ‘UL duration’ for subframe n, the UE is not required to receive any downlink physical channels and/or physical signals in subframe(s) n+l+ i with i = 0, 1, …, d-1.

…

[TS 36.321, clause 7.1]

RNTI values are presented in Table 7.1-1 and their usage and associated Transport Channels and Logical Channels are presented in Table 7.1-2.

Table 7.1-1: RNTI values

Value (hexa-decimal)

RNTI

0000

N/A

0001-0960

RA-RNTI, C-RNTI, Semi-Persistent Scheduling C-RNTI, Temporary C-RNTI, eIMTA-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI, SL-RNTI (see note), G-RNTI, SL-V-RNTI and SRS-TPC-RNTI

0961-FFF3

C-RNTI, Semi-Persistent Scheduling C-RNTI, eIMTA-RNTI, Temporary C-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI, SL-RNTI, G-RNTI, SL-V-RNTI and SRS-TPC-RNTI

FFF4-FFF9

Reserved for future use

FFFA

SC-N-RNTI

FFFB

SC-RNTI

FFFC

CC-RNTI

FFFD

M-RNTI

FFFE

P-RNTI

FFFF

SI-RNTI

NOTE: A MAC entity uses the same C-RNTI on all Serving Cells.

Table 7.1-2: RNTI usage

RNTI

Usage

Transport Channel

Logical Channel

P-RNTI

Paging and System Information change notification

PCH

PCCH

SI-RNTI

Broadcast of System Information

DL-SCH

BCCH, BR-BCCH

M-RNTI

MCCH Information change notification

N/A

N/A

RA-RNTI

Random Access Response

DL-SCH

N/A

eIMTA-RNTI

eIMTA TDD UL/DL configuration notification

N/A

N/A

Temporary C-RNTI

Contention Resolution

(when no valid C-RNTI is available)

DL-SCH

CCCH

Temporary C-RNTI

Msg3 transmission

UL-SCH

CCCH, DCCH, DTCH

C-RNTI

Dynamically scheduled unicast transmission

UL-SCH

DCCH, DTCH

C-RNTI

Dynamically scheduled unicast transmission

DL-SCH

CCCH, DCCH, DTCH

C-RNTI

Triggering of PDCCH ordered random access

N/A

N/A

Semi-Persistent Scheduling C-RNTI

Semi-Persistently scheduled unicast transmission

(activation, reactivation and retransmission)

DL-SCH, UL-SCH

DCCH, DTCH

Semi-Persistent Scheduling C-RNTI

Semi-Persistently scheduled unicast transmission

(deactivation)

N/A

N/A

TPC-PUCCH-RNTI

Physical layer Uplink power control

N/A

N/A

TPC-PUSCH-RNTI

Physical layer Uplink power control

N/A

N/A

SL-RNTI

Dynamically scheduled sidelink transmission for sidelink communication

SL-SCH

STCH

SC-RNTI

Dynamically scheduled SC-PTM control information

DL-SCH

SC-MCCH

G-RNTI

Dynamically scheduled SC-PTM transmission

DL-SCH

SC-MTCH

SC-N-RNTI

SC-MCCH Information change notification

N/A

N/A

CC-RNTI

Providing common control PDCCH information

N/A

N/A

SL-V-RNTI

Dynamically scheduled sidelink transmission for V2X sidelink communication

SL-SCH

STCH

SRS-TPC-RNTI

SRS and TPC for the PUSCH-less SCells

N/A

N/A

7.1.11.1.3 Test description

7.1.11.1.3.1 Pre-test conditions

System Simulator:

2 Cells

  • Cell 1 (PCell) and Cell 10(SCell)
  • Cell 10 is an Active SCell according to [18] cl. 6.3.4, configured with LAA Frame Structure 3.

UE:

None.

Preamble:

– The UE is in state Loopback Activated (state 4) in Cell 1 according to [18].

7.1.11.1.3.2 Test procedure sequence

Table 7.1.11.1.3.2-1shows the cell configurations used during the test. The configuration T0 indicates the initial conditions.

Table 7.1.11.1.3.2-1: Cell configuration

 

Parameter

Unit

Cell 1

Cell 10

Remarks

T0

RS EPRE

dBm/15kHz

-85

-85

Table 7.1.11.1.3.2-2: Main behaviour

St

Procedure

Message Sequence

TP

Verdict

U – S

Message

0A

The SS transmits an RRConnectionReconfiguration message containing a sCellToAddModList on Cell 1 with SCell (Cell 10) addition.

<–

–

–

–

0B

The UE transmits RRCConnectionReconfigurationComplete

–>

–

–

–

1

The SS transmits Activation MAC control element to activate LAA Scell (Cell 10).

<–

(Activation)

–

–

2

The SS indicates a new transmission on PDCCH and a DCI format 1C scrambled with CC-RNTI for common control information containing ‘Subframe Configuration for LAA’ field set to ‘0111’B and transmits a MAC PDU in Cell 10.

<–

MAC PDU

–

–

3

60 ms after step 2he SS sends an UL grant suitable for the loop back PDU to be transmitted in Cell 1

<–

(UL Grant)

4

The UE transmits a MAC PDU containing the loop back PDU corresponding to step 2.

–>

MAC PDU

1

P

7.1.11.1.3.3 Specific message contents

Table 7.1.11.1.3.3-1: RRCConnectionReconfiguration (step 0A, Table 7.1.11.1.3.2-1)

Derivation Path: 36.331 clause 6.2.2 36.508, Table 4.6.1-8

Information Element

Value/remark

Comment

Condition

RRCConnectionReconfiguration ::= SEQUENCE {

rrc-TransactionIdentifier

RRC-TransactionIdentifier-DL

criticalExtensions CHOICE {

c1 CHOICE{

rrcConnectionReconfiguration-r8 SEQUENCE {

measConfig

Not present

mobilityControlInfo

Not present

dedicatedInfoNASList

Not present

radioResourceConfigDedicated

RadioResourceConfigDedicated-DEFAULT

securityConfigHO

Not present

nonCriticalExtension

SCellToAddMod-r10-DEFAULT

}

}

}

}

Table 7.1.11.1.3.3-1A: RadioResourceConfigDedicated-DEFAULT (step 0A, Table 7.1.11.1.3.2-1)

Derivation Path: 36.331 clause 6.3.2

Information Element

Value/remark

Comment

Condition

RadioResourceConfigDedicated-HO ::= SEQUENCE {

srb-ToAddModList

Not present

drb-ToAddModList

Not present

drb-ToReleaseList

Not present

mac-MainConfig

Not present

sps-Config

Not present

physicalConfigDedicated

PhysicalConfigDedicated -DEFAULT

}

Table 7.1.11.1.3.3-1B: SCellToAddMod-r10-DEFAULT (step 0A, Table 7.1.11.1.3.2-1)

Derivation Path: 36.508 clause 4.6.3 Table 4.6.3-19D and Table 4.6.3-19AA

Information Element

Value/remark

Comment

Condition

SCellToAddMod-r10 ::= SEQUENCE {

sCellIndex-r10

1

radioResourceConfigDedicatedSCell-r10 SEQUENCE {

physicalConfigDedicatedScell-r10

PhysicalConfigDedicatedSCell-r10-DEFAULT

}

}

Table 7.1.11.1.3.3-2: PhysicalConfigDedicated-DEFAULT (Table 7.1.11.1.3.3-1A)

Derivation Path: 36.508, clause 4.6.3 table 4.8.2.1.6-1

Information Element

Value/remark

Comment

Condition

PhysicalConfigDedicated-DEFAULT ::= SEQUENCE {

pucch-ConfigDedicated-v1020

PUCCH-ConfigDedicated-v1020-DEFAULT

2TX AND FDD, TDD

pusch-ConfigDedicated-v1130

Not present

uplinkPowerControlDedicated-v1130

Not present

}

Note: All other IE’s are not present

Table 7.1.11.1.3.3-3: Void

Table 7.1.11.1.3.3-4: PhysicalConfigDedicatedScell-r10-DEFAULT (Table 7.1.11.1.3.3-4)

Derivation Path: 36.508 clause 4.6.3 Table 4.6.3-6A and 36.331 clause 6.3.2

Information Element

Value/remark

Comment

Condition

PhysicalConfigDedicatedScell-r10 ::= SEQUENCE {

laa-SCellConfiguration-r13 SEQUENCE {

subframeStartPosition-r13

s0

laa-SCellSubframeConfig-r13

00000000

LAA FS3

}

}