5G/NR - Slot Format Combination                        Home : www.sharetechnote.com

 

 

 

 

 

Slot Format Combination

 

 

Slot format is defined in a big table in 38.213-Table 11.1.1-1: Slot formats for normal cyclic prefix. An important question is how to determine which slot format is used in a specific slot and how those information is notified to UE. This process is done by the combination of several RRC paramters shown below and DCI 2_0.

 

 

SlotFormatCombination ::=       SEQUENCE {

    slotFormatCombinationId         SlotFormatCombinationId,

    slotFormats                     SEQUENCE (SIZE (1..maxNrofSlotFormatsPerCombination))

                                              OF INTEGER (0..255)

}

 

SlotFormats : The format index defined in 38.213-Table 11.1.1-1: Slot formats for normal cyclic prefix:

 

 

SlotFormatCombinationsPerCell ::=   SEQUENCE {

    servingCellId               ServCellIndex,

    subcarrierSpacing           SubcarrierSpacing,

    subcarrierSpacing2          SubcarrierSpacing   OPTIONAL,   -- Need R

    slotFormatCombinations      SEQUENCE (SIZE (1..maxNrofSlotFormatCombinationsPerSet))

                                                  OF SlotFormatCombination  OPTIONAL,

    positionInDCI               INTEGER(0..maxSFI-DCI-PayloadSize-1)    OPTIONAL,

    ...

}

 

 

The IE SlotFormatIndicator is used to configure monitoring a Group-Common-PDCCH for Slot-Format-Indicators (SFI).

 

SlotFormatIndicator ::=         SEQUENCE {

    sfi-RNTI                RNTI-Value,

    dci-PayloadSize             INTEGER (1..maxSFI-DCI-PayloadSize),

    slotFormatCombToAddModList      SEQUENCE (SIZE(1..maxNrofAggregatedCellsPerCellGroup))

                                          OF SlotFormatCombinationsPerCell    OPTIONAL,   

    slotFormatCombToReleaseList     SEQUENCE (SIZE(1..maxNrofAggregatedCellsPerCellGroup))

                                                        OF ServCellIndex    OPTIONAL,   

    ...

}

 

dci-PayloadSize : Defines the payload size of DCI 2_0. maxSFI-DCI-PayloadSize is 128.

 

 

<38.213 v15.7 -Table 11.1.1-1: Slot formats for normal cyclic prefix>

D : Downlink, U : Uplink, F : Flexible

 

Symbol Number in a slot

Format

0

1

2

3

4

5

6

7

8

9

10

11

12

13

0

D

D

D

D

D

D

D

D

D

D

D

D

D

D

1

U

U

U

U

U

U

U

U

U

U

U

U

U

U

2

F

F

F

F

F

F

F

F

F

F

F

F

F

F

3

D

D

D

D

D

D

D

D

D

D

D

D

D

F

4

D

D

D

D

D

D

D

D

D

D

D

D

F

F

5

D

D

D

D

D

D

D

D

D

D

D

F

F

F

6

D

D

D

D

D

D

D

D

D

D

F

F

F

F

7

D

D

D

D

D

D

D

D

D

F

F

F

F

F

8

F

F

F

F

F

F

F

F

F

F

F

F

F

U

9

F

F

F

F

F

F

F

F

F

F

F

F

U

U

10

F

U

U

U

U

U

U

U

U

U

U

U

U

U

11

F

F

U

U

U

U

U

U

U

U

U

U

U

U

12

F

F

F

U

U

U

U

U

U

U

U

U

U

U

13

F

F

F

F

U

U

U

U

U

U

U

U

U

U

14

F

F

F

F

F

U

U

U

U

U

U

U

U

U

15

F

F

F

F

F

F

U

U

U

U

U

U

U

U

16

D

F

F

F

F

F

F

F

F

F

F

F

F

F

17

D

D

F

F

F

F

F

F

F

F

F

F

F

F

18

D

D

D

F

F

F

F

F

F

F

F

F

F

F

19

D

F

F

F

F

F

F

F

F

F

F

F

F

U

20

D

D

F

F

F

F

F

F

F

F

F

F

F

U

21

D

D

D

F

F

F

F

F

F

F

F

F

F

U

22

D

F

F

F

F

F

F

F

F

F

F

F

U

U

23

D

D

F

F

F

F

F

F

F

F

F

F

U

U

24

D

D

D

F

F

F

F

F

F

F

F

F

U

U

25

D

F

F

F

F

F

F

F

F

F

F

U

U

U

26

D

D

F

F

F

F

F

F

F

F

F

U

U

U

27

D

D

D

F

F

F

F

F

F

F

F

U

U

U

28

D

D

D

D

D

D

D

D

D

D

D

D

F

U

29

D

D

D

D

D

D

D

D

D

D

D

F

F

U

30

D

D

D

D

D

D

D

D

D

D

F

F

F

U

31

D

D

D

D

D

D

D

D

D

D

D

F

U

U

32

D

D

D

D

D

D

D

D

D

D

F

F

U

U

33

D

D

D

D

D

D

D

D

D

F

F

F

U

U

34

D

F

U

U

U

U

U

U

U

U

U

U

U

U

35

D

D

F

U

U

U

U

U

U

U

U

U

U

U

36

D

D

D

F

U

U

U

U

U

U

U

U

U

U

37

D

F

F

U

U

U

U

U

U

U

U

U

U

U

38

D

D

F

F

U

U

U

U

U

U

U

U

U

U

39

D

D

D

F

F

U

U

U

U

U

U

U

U

U

40

D

F

F

F

U

U

U

U

U

U

U

U

U

U

41

D

D

F

F

F

U

U

U

U

U

U

U

U

U

42

D

D

D

F

F

F

U

U

U

U

U

U

U

U

43

D

D

D

D

D

D

D

D

D

F

F

F

F

U

44

D

D

D

D

D

D

F

F

F

F

F

F

U

U

45

D

D

D

D

D

D

F

F

U

U

U

U

U

U

46

D

D

D

D

D

F

U

D

D

D

D

D

F

U

47

D

D

F

U

U

U

U

D

D

F

U

U

U

U

48

D

F

U

U

U

U

U

D

F

U

U

U

U

U

49

D

D

D

D

F

F

U

D

D

D

D

F

F

U

50

D

D

F

F

U

U

U

D

D

F

F

U

U

U

51

D

F

F

U

U

U

U

D

F

F

U

U

U

U

52

D

F

F

F

F

F

U

D

F

F

F

F

F

U

53

D

D

F

F

F

F

U

D

D

F

F

F

F

U

54

F

F

F

F

F

F

f

D

D

D

D

D

D

D

55

D

D

F

F

F

U

U

U

D

D

D

D

D

D

62-254

Reserved

255

UE determines the slot format for the slot based on tdd-UL-DL-ConfigurationCommon, or tdd-ULDL-

ConfigurationDedicated and, if any, on detected DCI formats

 

 

 

 

Reference

 

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