13A Subframe configuration for Frame Structure Type 3
36.2133GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Physical layer proceduresRelease 17TS
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 |
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 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.
Table 13A-2: UL duration and offset.
|
Value of |
UL offset, (in subframes) |
UL duration, |
|
00000 |
Not configured |
Not configured |
|
00001 |
1 |
1 |
|
00010 |
1 |
2 |
|
00011 |
1 |
3 |
|
00100 |
1 |
4 |
|
00101 |
1 |
5 |
|
00110 |
1 |
6 |
|
00111 |
2 |
1 |
|
01000 |
2 |
2 |
|
01001 |
2 |
3 |
|
01010 |
2 |
4 |
|
01011 |
2 |
5 |
|
01100 |
2 |
6 |
|
01101 |
3 |
1 |
|
01110 |
3 |
2 |
|
01111 |
3 |
3 |
|
10000 |
3 |
4 |
|
10001 |
3 |
5 |
|
10010 |
3 |
6 |
|
10011 |
4 |
1 |
|
10100 |
4 |
2 |
|
10101 |
4 |
3 |
|
10110 |
4 |
4 |
|
10111 |
4 |
5 |
|
11000 |
4 |
6 |
|
11001 |
6 |
1 |
|
11010 |
6 |
2 |
|
11011 |
6 |
3 |
|
11100 |
6 |
4 |
|
11101 |
6 |
5 |
|
11110 |
6 |
6 |
|
11111 |
reserved |
reserved |
(in subframes)