Ul power control for transport block transmission over multiple slots

Patent metadata

Field	Value
Publication number	US-2024188001-A1
Application number	US-202218285471-A
Country	US
Kind code	A1
Filing date	Apr 4, 2022
Priority date	Apr 3, 2021
Publication date	Jun 6, 2024
Grant date	—

Abstract

Systems and methods are disclosed herein for uplink power control for Transport Block (TB) over Multiple Slots (TBoMS). In one embodiment, a method performed by a wireless communication device comprises determining transmit power for a TBoMS uplink transmission per TBoMS transmission occasion and transmitting the TBoMS uplink transmission. In this manner, power control for TBoMS is provided.

First claim

1 . A method performed by a wireless communication device, the method comprising:
determining transmit power for a transport block over multiple slots (TBoMS) uplink transmission per TBoMS transmission occasion; and transmitting the TBoMS uplink transmission in accordance with the transmit power.

2 - 4 . (canceled)

5 . The method of claim 1 wherein one TBoMS transmission occasion of the TBoMS uplink transmission spans two or more consecutive slots of the TBoMS uplink transmission.

6 . The method of claim 5 wherein one TBoMS transmission occasion of the TBoMS uplink transmission is defined by an index n s,f μ of a first slot of the TBoMS transmission occasion with system frame number “SFN” , a first symbol S within the first slot of the TBoMS transmission occasion, and a number of consecutive symbols L of the TBoMS uplink transmission in the first slot or a number of total symbols L of the TBoMS uplink transmission in the transmission occasion.

7 . The method of claim 1 wherein one TBoMS transmission occasion of the TboMS uplink transmission spans two or more consecutive or non-consecutive slots of the TboMS uplink transmission.

8 . The method of claim 7 wherein one TBoMS transmission occasion of the TBoMS uplink transmission is defined by an index n s,f μ of a first slot of the TBoMS transmission occasion with system frame number “SFN”, a first symbol S within the first slot, and a number of symbols L of the TBoMS uplink transmission either in the first slot or across multiple slots of the TBoMS uplink transmission.

9 . (canceled)

10 . (canceled)

11 . (canceled)

12 . The method of claim 1 wherein one TBoMS transmission occasion spans two or more slots and determining the transmit power for the TBoMS uplink transmission per TBoMS transmission occasion comprises either:
determining a transmit power for a TBoMS transmission occasion that is equivalent to a transmit power determined for a first slot of the TBoMS transmission occasion, where the same transmit power is kept until an end of the TBoMS transmission occasion, or
determining a transmit power for a TBoMS transmission occasion considering the two or more slots of the TBoMS transmission occasion as a whole.

13 . The method of claim 12 wherein a particular parameter is different for at least two of the two or more slots of the TBoMS transmission occasion, and determinin the transmit power for the TBoMS transmission occasion comprises determining the transmit power for the TBoMS transmission occasion based on the particular parameter for a fixed one or more of the two or more slots of the TBoMS transmission occasion.

14 . The method of claim 1 wherein whether or not a change of transmit power is allowed during the TBoMS uplink transmission is either configured by a network node or predetermined.

15 . (canceled)

16 . (canceled)

17 . (canceled)

18 . The method of claim 1 wherein the transmit power changes between TBoMS transmission occasions for the TBoMS uplink transmission based on one or parameters.

19 . The method of claim 18 wherein the one or more parameters comprise: (a) data-to-Demodulation Reference Signal, DMRS, ratio in each slot, (b) group common Transmit Power Control, TPC, command, (c) reference signal, (d) pathloss estimation, (e) PUSCH power control adjustment state, or (f) any combination of two or more of (a)-(e).

20 . The method of claim 1 wherein a same transmit power is configured or predetermined across the multiple slots of the TBoMS uplink transmission, and the wireless communication device determines the transmit power prior to transmission based on a transmit power in a first slot and keeps the transmit power the same until an end of the TBoMS uplink transmission.

21 . The method of claim 20 wherein:
the wireless communication device does not expect to receive a TPC command for the TBoMS uplink transmission during the TBoMS uplink transmission; and/or
if the wireless communication device receives a TPC command for the TBoMS uplink transmission during the TBoMS uplink transmission:
the wireless communication device discards the TPC command, or
the wireless communication device applies the TPC command in a next transmission after the TBoMS uplink transmission; and/or

the wireless communication device does not expect a respective base station to change a reference signal and its transmission power, which the wireless communication device uses to estimate downlink pathloss during the TBoMS uplink transmission; and/or
the wireless communication device does not perform downlink pathloss measurement from the physical layer during the TBoMS uplink transmission; and/or
the wireless communication device does not expect PUSCH power control adjustment state l to be changed by RRC or DCI signaling during the TBoMS uplink transmission.

22 . The method of claim 1 wherein determining the transmit power for the TBoMS uplink transmission per TBoMS transmission occasion comprises calculating one or more TBoMS transmission occasion related parameters.

23 . The method of claim 22 wherein the one or more TBoMS transmission occasion related parameters comprise: (I) MCS related parameter Δ TF,b,f,c (i), (II) BPRE, (III) PUSCH power control adjustment state f b,f,c (i, l) for active UL BWP b of carrier f of serving cell c in PUSCH transmission occasion i, or (IV) a combination of any two or more of (I)-(III).

24 . The method of claim 22 wherein the one or more TBoMS transmission occasion related parameters comprise BPRE.

25 . The method of claim 24 wherein the BPRE is BRE for multi-slot PUSCH with UL-SCH calculated cross the multiple slots of the TBoMS as:

B
⁢
P
⁢
R
⁢
E

=

∑

r
=
0

C
-
1

K
r

N

R
⁢
E

where NREIS a number of resource elements across the multiple slots of a TBoMS, determined as N RE =Σ i=0 N−1 (M RB,b,f,c PUSCH (i)·Σ j=0 N symb,b,f,b PUSCH (i)−1 N sc,data RB (i, j)), where N is the total number of transmission occasions of the TBoMS, N symb,b,f,c PUSCH (i) is a number of symbols for PUSCH transmission occasion i on active UL BWP b of carrier f of serving cell c, N sc,data RB (i, j) is a number of subcarriers excluding DM-RS subcarriers and phase-tracking RS samples in PUSCH symbol j, 0≤j<N symb,b,f,c PUSCH (i).

26 . The method of claim 24 wherein the BPRE is BRE for multi-slot PUSCH with UL-SCH calculated cross the multiple slots of the TBoMS as:

BPRE
=

∑

r

Assignees

• Ericsson Telefon Ab L M

Inventors

• Su Ling
• Lin Zhipeng
• Harrison Robert Mark

Classifications

• H04W52/242

  taking into account path loss · CPC title

• H04W52/38 Primary

  TPC being performed in particular situations · CPC title

• H04W52/346 Primary

  distributing total power among users or channels · CPC title

• H04W52/146

  Uplink power control · CPC title