Uplink transmission power allocation

• US 10,660,077 B2
• Filed: 08/09/2019
• Issued: 05/19/2020
• Est. Priority Date: 08/09/2018
• Status: Active Grant

• Current Assignee: Lenovo Singapore Pte Limited (Lenovo Group Ltd.)
• Original Assignee: Lenovo Singapore Pte Limited (Lenovo Group Ltd.)
• Inventors: MolavianJazi, Ebrahim, Jung, Hyejung, Nangia, Vijay, Loehr, Joachim, Kuchibhotla, Ravi
• Primary Examiner(s): Trinh, Tan H
• Application Number:
  US16/537,386
• Publication Number:
  US 20200053657A1
• Time in Patent Office: 284 Days
• Field of Search: 455 69, 455522, 455450, 370329
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/281 taking into account user or data type priority
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 52/365 Power headroom reporting
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/56 based on priority criteria

Abstract

Apparatuses, methods, and systems are disclosed for uplink transmission power allocation. One method includes: determining a transmission time for a first transmission (“FT”); determining first transmissions overlapping with the FT that start before a start time (“ST”) of the FT; determining a cut-off time (“COT”) for power determination; determining second transmissions overlapping with the FT that start at or later than (“SAOLT”) the ST; scheduling information and/or transmission information for the second transmissions is known at or before the COT; determining third transmissions that overlap with the FT that SAOLT the ST; scheduling information and/or transmission information for the third transmissions is known after the COT; allocating FT power based on a maximum total transmission power for the first transmissions and a minimum guaranteed power corresponding to the second transmissions and/or the third transmissions; and performing the FT using the FT power.

Claims

1. A method comprising:

determining, at a user equipment, a transmission time for a first transmission;

determining a first set of transmissions that overlap with the first transmission that start before a start time of the first transmission;

determining a cut-off time for power determination for the first transmission;

determining a second set of transmissions that overlap with the first transmission that start at or later than the start time of the first transmission, wherein scheduling information, transmission information, or a combination thereof for each transmission of the second set of transmissions is known at or before the cut-off time for power determination;

determining a third set of transmissions that overlap with the first transmission that start at or later than the start time of the first transmission, wherein the scheduling information, the transmission information, or a combination thereof for each transmission of the third set of transmissions is known after the cut-off time for power determination;

allocating first transmission power for the first transmission based on a maximum total transmission power allocated to the first set of transmissions and a minimum guaranteed power corresponding to the second set of transmissions, the third set of transmissions, or some combination thereof; and

performing the first transmission using the first transmission power.

2. The method of claim 1, wherein allocating first transmission power for the first transmission comprises:

calculating the minimum guaranteed power for the second set of transmissions and the minimum guaranteed power for the third set of transmissions;

allocating first set transmission power to the first set of transmissions based on an aggregate power corresponding to the first set of transmissions;

allocating third set transmission power to the third set of transmissions, wherein the third set transmission power is based on the minimum guaranteed power for the third set of transmissions; and

allocating second set transmission power to the second set of transmissions based the minimum guaranteed power for the second set of transmissions.

3. The method of claim 1, wherein the cut-off time for power determination for the first transmission is based on an uplink transmission time offset by an offset time.

4. The method of claim 3, wherein the offset time comprises a minimum physical uplink shared channel preparation time.

5. The method of claim 1, wherein the cut-off time for power determination for the first transmission is based on downlink control information, a higher-layer signaling time, or a combination thereof.

6. The method of claim 1, wherein the minimum guaranteed power is a semi-statically configured factor of a configured maximum transmission power.

7. The method of claim 1, wherein the minimum guaranteed power corresponds to a configured maximum transmission power for a highest priority overlapping transmission.

8. The method of claim 1, wherein the cut-off time for power determination for the first transmission is based on downlink control information reception time offset by an offset time.

9. The method of claim 8, wherein the offset time is based on a minimum physical downlink control channel processing time, a minimum physical uplink control channel preparation time, a sounding reference signal transmission preparation time, or some combination thereof.

10. The method of claim 1, further comprising operating the user equipment with dual connectivity comprising a first cell group and a second cell group, wherein at least the first transmission is on a first serving cell of a first cell group, and at least one transmission of the first set of transmissions, the second set of transmissions, and the third set of transmissions is on a second serving cell of the second cell group.

11. The method of claim 10, further comprising operating the first serving cell with a first numerology and the second serving cell with a second numerology, wherein the first numerology and the second numerology are different.

12. An apparatus comprising:

a processor that;

determines a transmission time for a first transmission;

determines a first set of transmissions that overlap with the first transmission that start before a start time of the first transmission;

determines a cut-off time for power determination for the first transmission;

determines a second set of transmissions that overlap with the first transmission that start at or later than the start time of the first transmission, wherein scheduling information, transmission information, or a combination thereof for each transmission of the second set of transmissions is known at or before the cut-off time for power determination;

determines a third set of transmissions that overlap with the first transmission that start at or later than the start time of the first transmission, wherein the scheduling information, the transmission information, or a combination thereof for each transmission of the third set of transmissions is known after the cut-off time for power determination;

allocates first transmission power for the first transmission based on a maximum total transmission power allocated to the first set of transmissions and a minimum guaranteed power corresponding to the second set of transmissions, the third set of transmissions, or some combination thereof; and

performs the first transmission using the first transmission power.

13. The apparatus of claim 12, wherein the processor allocating first transmission power for the first transmission comprises the processor:

calculating the minimum guaranteed power for the second set of transmissions and the minimum guaranteed power for the third set of transmissions;

allocating first set transmission power to the first set of transmissions based on an aggregate power corresponding to the first set of transmissions;

allocating third set transmission power to the third set of transmissions, wherein the third set transmission power is based on the minimum guaranteed power for the third set of transmissions; and

allocating second set transmission power to the second set of transmissions based the minimum guaranteed power for the second set of transmissions.

14. The apparatus of claim 12, wherein the cut-off time for power determination for the first transmission is based on an uplink transmission time offset by an offset time.

15. The apparatus of claim 14, wherein the offset time comprises a minimum physical uplink shared channel preparation time.

16. The apparatus of claim 12, wherein the cut-off time for power determination for the first transmission is based on downlink control information, a higher-layer signaling time, or a combination thereof.

17. The apparatus of claim 12, wherein the minimum guaranteed power corresponds to a configured maximum transmission power for a highest priority overlapping transmission.

18. The apparatus of claim 12, wherein the cut-off time for power determination for the first transmission is based on downlink control information reception time offset by an offset time.

19. The apparatus of claim 12, wherein the processor operates the apparatus with dual connectivity comprising a first cell group and a second cell group, at least the first transmission is on a first serving cell of a first cell group, and at least one transmission of the first set of transmissions, the second set of transmissions, and the third set of transmissions is on a second serving cell of the second cell group.

20. The apparatus of claim 19, wherein the processor operates the first serving cell with a first numerology and the second serving cell with a second numerology, and the first numerology and the second numerology are different.