Method and apparatus for transmitting uplink signals in wireless communication system

• US 10,531,398 B2
• Filed: 11/20/2018
• Issued: 01/07/2020
• Est. Priority Date: 01/03/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yang, Suckchel, Ahn, Joonkui, Seo, Dongyoun, Yi, Yunjung
• Primary Examiner(s): Sobutka, Philip
• Application Number:
  US16/196,968
• Publication Number:
  US 20190090204A1
• Time in Patent Office: 413 Days
• Field of Search: 455522
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 27/2607 Cyclic extensions
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/281 taking into account user or data type priority
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• 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 52/365 Power headroom reporting
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 52/58 Format of the TPC bits
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/20 : Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 : in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 76/15 : Setup of multiple wireless link connections
• CPC Class Codes: H04W 88/02 : Terminal devices

Abstract

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for a terminal controlling uplink power in the wireless communication system, comprising the steps of: configuring an uplink subframe (UL SF) of a first set and a UL SF of a second set; receiving a downlink control information (DCI) format including a bitmap for indicating transmit power control (TPC) for a plurality of terminals; and controlling transmit power of an uplink channel by using TPC information on the terminals from the bitmap, wherein the TPC information is used for controlling transmit power of an uplink channel transmitted from the UL SF of the first set when the DCI format comprises a first identifier, and the TPC information is used for controlling transmit power of an uplink channel transmitted from the UL SF of the second set when the DCI format comprises a second identifier.

Claims

1. A method for transmitting physical random access preamble channels (PRACHs) by a user equipment (UE) to in a wireless communication system, the method comprising:

transmitting a first PRACH for a first cell group; and

transmitting a second PRACH for a second cell group such that the first PRACH and the second PRACH overlap in time,

wherein the first PRACH is transmitted at a first PRACH power and the second PRACH is transmitted at a second PRACH power, the second PRACH power being a reduced second PRACH power level so that a sum of the first PRACH power and the second PRACH power does not exceed a total PRACH power limit, and

wherein the first cell group comprises a primary cell (PCell), and the second cell group comprises at least one secondary cell (SCell).

2. The method of claim 1, wherein the second PRACH power is reduced from a predetermined second PRACH power level so that the sum of the first PRACH power and the second PRACH power does not exceed the total PRACH power limit.

3. The method of claim 2, wherein the predetermined second PRACH power level is a maximum power level for the second PRACH.

4. The method of claim 1, wherein the first cell group further comprises zero SCells.

5. The method of claim 1, wherein the first cell group further includes one or more SCells.

6. The method of claim 1, wherein the at least one SCell comprises two or more SCells.

7. The method of claim 1, wherein the at least one SCell consists of one SCell.

8. The method of claim 1, wherein the second cell group does not include a PCell.

9. The method of claim 1, wherein the first cell group corresponds to a first base station, and the second cell group corresponds to a second base station.

10. The method of claim 1, wherein the first cell group and the second cell group correspond to a common base station.

11. The method of claim 1, wherein the first PRACH power is unreduced from a predetermined first PRACH power level when the sum of the first PRACH power and the second PRACH power does not exceed the total PRACH power limit.

12. The method of claim 1, wherein the overlap in time comprises a partial overlap between the first PRACH and the second PRACH.

13. The method of claim 1, wherein the overlap in time comprises a complete overlap between one of the first PRACH or the second PRACH with another of the first PRACH or the second PRACH.

14. The method of claim 1 further comprising:

receiving information about the total PRACH power limit from an upper layer of the UE.

15. The method of claim 1, wherein a duration of the first PRACH is longer than a duration of the second PRACH.

16. The method of claim 1, wherein a duration of the second PRACH is longer than a duration of the first PRACH.

17. The method of claim 1, wherein a duration of the second PRACH is equal to a duration of the first PRACH.

18. A device for transmitting physical random access preamble channels (PRACHs) by a user equipment (UE) to in a wireless communication system, the device comprising:

a transmitter; and

a processor for controlling the transmitting to;

transmit a first PRACH for a first cell group; and

transmit a second PRACH for a second cell group such that the first PRACH and the second PRACH overlap in time,

wherein the first PRACH is transmitted at a first PRACH power and the second PRACH is transmitted at a second PRACH power, the second PRACH power being a reduced second PRACH power level so that a sum of the first PRACH power and the second PRACH power does not exceed a total PRACH power limit, and

wherein the first cell group comprises a primary cell (PCell), and the second cell group comprises at least one secondary cell (SCell).