Configuration of grant-less uplink transmissions for a user equipment
Technology for a user equipment (UE) operable to decode grant less downlink control information (G-D 5 CI) received from a Next Generation NodeB (gNB) is disclosed. The UE can decode the G-DCI received from the gNB in a MulteFire system. The UE can identify grant less uplink DCI components included in the G-DCI. The UE can perform a grant less uplink transmission with the gNB based on the grant less uplink DCI components in the G-DCI received from the gNB.
1. An apparatus of a base station operable to configure a user equipment (UE) for grant less uplink (GUL) transmissions in a cell, the apparatus comprising:
one or more processors configured to:
select, at the base station in the cell, a demodulation reference signal (DMRS) configuration for a GUL transmission from the UE, wherein the DMRS configuration includes n DMRS (1) and n DMRS,λ (2) , wherein n DMRS (1) and n DMRS,λ (2) represent two DMRS parameters for a cyclic shift and an orthogonal sequence (w (λ) (m));
select, at the base station, a starting position for a GUL transmission from the UE;
determine, at the base station, a resource allocation (RA) for the UE; and
encode, at the base station, the DMRS configuration, the starting position and the RA for transmission to the UE; and
a memory interface configured to retrieve from a memory the DMRS configuration, the starting position and the RA.
2. The apparatus of claim 1 , further comprising a transceiver configured to transmit the DMRS configuration, the starting position and the RA to the UE.
3. The apparatus of claim 1 , wherein the one or more processors are configured to encode the RA for transmission to the UE via grant less physical uplink shared channel (PUSCH) activation/release downlink control information (DCI).
4. The apparatus of claim 1 , wherein the DMRS configuration for the GUL transmission is indicated by the base station via radio resource control (RRC) signaling.
5. The apparatus of claim 1 , wherein a value of n DMRS (1) in the DMRS configuration for the GUL transmission is given by the following:
cyclicShift
cyclicShift1-R1-1
n DMRS (1)
0
000
0
1
001
2
2
010
3
3
011
4
4
100
6
5
101
8
6
110
9
7
111
10.
6. The apparatus of claim 1 , wherein a value of n DMRS,λ (2) and a value of the orthogonal sequence (w (λ) (m)) in the DMRS configuration for the GUL transmission is given by the following:
Cyclic Shift
Field in
uplink-
related DCI
format [3] or
cyclicShift2-
n DMRS, λ (2)
[w (λ) (0) w (λ) (1)]
R1-1
λ = 0
λ = 1
λ = 2
λ = 3
λ = 0
λ = 1
λ = 2
λ = 3
000
0
6
3
9
[1 1]
[1 1]
[1 −1]
[1 −1]
001
6
0
9
3
[1 −1]
[1 −1]
[1 1]
[1 1]
010
3
9
6
0
[1 −1]
[1 −1]
[1 1]
[1 1]
011
4
10
7
1
[1 1]
[1 1]
[1 1]
[1 1]
100
2
8
5
11
[1 1]
[1 1]
[1 1]
[1 1]
101
8
2
11
5
[1 −1]
[1 −1]
[1 −1]
[1 −1]
110
10
4
1
7
[1 −1]
[1 −1]
[1 −1]
[1 −1]
111
9
3
0
6
[1 1]
[1 1]
[1 −1]
[1 −1].
7. An apparatus of a user equipment (UE) operable to decode grant less downlink control information (G-DCI) received from a base station, the apparatus comprising:
one or more processors configured to:
decode, at the UE, the G-DCI received from the base station in a wireless system;
identify, at the UE, grant less uplink DCI components included in the G-DCI; and
perform, at the UE, a grant less uplink transmission with the base station based on the grant less uplink DCI components in the G-DCI received from the base station; and
a memory interface configured to send to a memory the G-DCI,
wherein the G-DCI includes a bit field with a flag that differentiates the G-DCI as corresponding to the G-DCI or a grant less activation/release DCI.
8. The apparatus of claim 7 , further comprising a transceiver configured to:
receive the G-DCI from the base station; and
send the grant less uplink transmission to the base station.
9. The apparatus of claim 7 wherein the grant less activation/release DCI includes a maximum transport block (TB) number configuration from the base station.
10. The apparatus of claim 7 , wherein the grant less activation/release DCI includes a two modulation and coding scheme (MCS) field, wherein an MCS of a second transport block (TB) is set to 29 indicating that the second TB is disabled and the grant less activation/release DCI corresponds to one TB information, or the grant less activation/release DCI corresponds to two TB information.
11. The apparatus of claim 7 , wherein the G-DCI includes one or more of:
a transmit power control (TPC) command for a grant less physical uplink shared channel (PUSCH), wherein the TPC command is provided using two bits;
hybrid automatic repeat request acknowledgement (HARQ-ACK) bitmap(s), wherein a number of the HARQ-ACK bitmap(s) is equal to an assigned grant less PUSCH HARQ process number that is specified via radio resource control (RRC) signaling;
a modulation and coding scheme (MCS) and redundancy version of a first transport block (TB1) using five bits;
an MCS and redundancy version of a second transport block (TB2) using five bits; and
precoding information and a number of multiple-input multiple-output (MIMO) layers.
12. The apparatus of claim 7 , wherein the G-DCI includes one or more of a transmit power control (TPC) field, a modulation and coding scheme (MCS) or a precoding matrix indicator (PMI), wherein the one or more of the TPC field, the MCS or the PMI is applied on a grant less uplink (GUL) subframe that is transmitted four subframes after a G-DCI subframe.
13. The apparatus of claim 7 , wherein the G-DCI is UE-specific and corresponds to format 0A/1A.
14. At least one non-transitory machine readable storage medium having instructions embodied thereon for configuring a user equipment (UE) for grant less uplink (GUL) transmissions, the instructions when executed by one or more processors at a base station perform the following:
identifying, at the base station, a mode switching indicator related to switching between a frequency division multiplexing (FDM) mode and a time division multiplexing (TDM) mode for the UE in a wireless system;
determining, at the base station, a resource allocation (RA) for the UE;
selecting, at the base station, a self-defer offset for the UE, wherein the self-defer offset indicates a starting position for a GUL transmission from the UE operating in the FDM mode or the TDM mode;
selecting, at the base station, a demodulation reference signal (DMRS) configuration for the GUL transmission from the UE; and
encoding, at the base station, the mode switching indicator, the RA, the self-defer offset and the DMRS configuration for transmission to the UE.
15. The at least one non-transitory machine readable storage medium of claim 14 , wherein the mode switching indicator includes three bits to indicate the starting position for the GUL transmission when the UE operates in the FDM mode.
16. The at least one non-transitory machine readable storage medium of claim 14 , wherein the FDM mode or the TDM mode is implicitly indicated by the base station via a special configuration of the RA.
17. The at least one non-transitory machine readable storage medium of claim 14 , further comprising instructions when executed perform the following: encoding the RA for transmission to the UE via grant less physical uplink shared channel (PUSCH) activation/release downlink control information (DCI).
18. The at least one non-transitory machine readable storage medium of claim 14 , further comprising instructions when executed perform the following: encoding the self-defer offset for transmission to the UE via higher layer signaling.
19. The at least one non-transitory machine readable storage medium of claim 14 , wherein the DMRS configuration for the GUL transmission is indicated by the base station via radio resource control (RRC) signaling and the DMRS configuration includes n DMRS (1) and n DMRS,80 (2), wherein n DMRS (1) and n DMRS (1) represent two DMRS parameters for a cyclic shift and an orthogonal cover code (OCC), wherein least significant bit (LSB) 3 bits are used to indicate a value of n DMRS (1) and most significant bit (MSB) 3 bits are used to indicate a value of n DMRS,λ (2) , and an OCC configuration.