Uplink power control in adaptively configured TDD communication systems

• US 9,986,567 B2
• Filed: 12/08/2015
• Issued: 05/29/2018
• Est. Priority Date: 03/18/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Papasakellariou, Aris
• Primary Examiner(s): RENNER, BRANDON M
• Application Number:
  US14/963,153
• Publication Number:
  US 20160095124A1
• Time in Patent Office: 903 Days
• Field of Search: None
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 52/146 Uplink power control
• 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 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A User Equipment (UE) in communication with a base station is configured by the base station for operation with an adapted Time Division Duplex (TDD) UpLink-DownLink (UL-DL) configuration. A process enables UL power control for transmissions of various channels or signals from the UE in two different sets of UL Transmission Time Intervals (TTIs) and a process enabling receptions of data transport blocks by the base station in two different sets of UL TTIs.

Claims

1. A method, comprising:

receiving, by a user equipment (UE);

first configuration for a first set of parameters associated with a first power control (PC) process,

second configuration for a second set of parameters associated with a second PC process different from the first PC process, wherein each of the first and second PC processes includes an open loop component and a closed loop component,

third configuration for a first set of subframes (SFs) and for a second set of SFs, wherein the first set of SFs and the second set of SFs do not have common SFs, and

control information indicating transmission for a physical uplink shared channel (PUSCH) or a reference signal (RS) in a SF;

determining a power either according to the first PC process when the SF is in the first set of SFs or according to the second PC process when the SF is in the second set of SFs; and

transmitting the PUSCH or the RS in the SF using the power.

2. The method of claim 1, further comprising:

receiving fourth configuration for a first value, β

_offset,1^PUSCH, an offset parameter and for a second value β

_offset,2^PUSCH, for the offset parameter, wherein the first value and the second value are associated, respectively, with the first set of SFs and the second set of SFs;

determining resource elements for multiplexing control information in the PUSCH using the first offset value when the SF is in the first set of SFs or using the second offset value when the SF is in the second set of SFs; and

transmitting the control information on the resource elements in the PUSCH in the SF.

3. The method of claim 1, wherein the control information includes a binary field, a binary value of ‘

0’

sets the association of the SF to the first set of SFs, and a binary value of ‘

1’

sets the association of the SF to the second set of SFs.

4. The method of claim 1, wherein:

the first PC process includes a first closed-loop PC process and the second PC process includes a second closed-loop PC process,

the UE transmits PUSCH or RS using the first PC process prior to receiving the second configuration, and

the UE initializes the second closed-loop PC process with a current value of the first closed-loop PC process upon activating the second configuration.

5. The method of claim 1, the UE always transmits a physical uplink control channel (PUCCH) in a SF that is in the first set of SFs.

6. A user equipment (UE), comprising:

a receiver configured to receive;

first configuration for a first set of parameters associated with a first power control (PC) process,

second configuration for a second set of parameters associated with a second PC process,

third configuration for a first set of subframes (SFs) and for a second set of SFs, wherein the first set of SFs and the second set of SFs do not have common SFs, and

control information indicating transmission for a physical uplink shared channel (PUSCH) or a reference signal (RS) in a SF;

a controller configured to determine a power according to the first PC process when the SF is in the first set of SFs or with a power determined according to the second PC process when the SF is in the second set of SFs; and

a transmitter configured to transmit the PUSCH or the RS in the SF using the power.

7. The UE of claim 6, wherein:

the receiver is further configured to receive fourth configuration for a first value β

_offset,1^PUSCH of an offset parameter and for a second value, β

_offset,2^PUSCH, for the offset parameter wherein the first value and the second value are associated, respectively, with the first set of SFs and the second set of SFs,

the controller is further configured to determine resource elements for multiplexing control information in the PUSCH using the first offset value when the SF is in the first set of SFs or using the second offset value when the SF is in the second set of SFs, and

the transmitter is further configured to transmit the control information on the resource elements in the PUSCH in the SF.

8. The UE of claim 6, wherein the control information includes a binary field, a binary value of ‘

0’

sets the association of the SF to the first set of SFs, and a binary value of ‘

1’

sets the association of the SF to the second set of SFs.

9. The UE of claim 6, wherein:

the first PC process includes a first closed-loop PC process and the second PC process includes a second closed-loop PC process,

the transmitter transmits PUSCH or RS using the first PC process prior to receiving the second configuration, and

the controller initializes the second closed-loop PC process with a current value of the first closed-loop PC process upon activating the second configuration.

10. The UE of claim 6, wherein the transmitter is always configured to transmit a physical uplink control channel (PUCCH) in a SF that is in the first set of SFs.

11. A base station, comprising:

a transmitter configured to transmit;

first configuration for a first set of parameters associated with a first power control (PC) process,

second configuration for a second set of parameters associated with a second PC process,

third configuration for a first set of subframes (SFs) and for a second set of SFs, wherein the first set of SFs and the second set of SFs do not have common SFs, and

control information indicating transmission for a physical uplink shared channel (PUSCH) or a reference signal (RS) in a SF;

a controller configured to determine a power according to the first PC process when the SF is in the first set of SFs or with a power determined according to the second PC process when the SF is in the second set of SFs; and

a receiver configured to receive the PUSCH or the RS in the SF.

12. The base station of claim 11, wherein:

the transmitter is further configured to transmit fourth configuration for a first value, β

_offset,1^PUSCH, of an offset parameter and for a second value, β

_offset,2^PUSCH, for the offset parameter wherein the first value and the second value are associated, respectively, with the first set of SFs and the second set of SFs,

the controller is further configured to determine resource elements for multiplexing control information in the PUSCH using the first offset value when the SF is in the first set of SFs or using the second offset value when the SF is in the second set of SFs, and

the receiver is further configured to receive the control information on the resource elements in the PUSCH in the SF.

13. The base station of claim 11, wherein the control information includes a binary field, a binary value of ‘

0’

sets the association of the SF to the first set of SFs, and a binary value of ‘

1’

sets the association of the SF to the second set of SFs.

14. The base station of claim 11, wherein the receiver is always configured to receive a physical uplink control channel (PUCCH) in a SF that is in the first set of SFs.

15. A method, comprising:

receiving, by a user equipment (UE);

first configuration for a first set of parameters associated with a first power control (PC) process,

second configuration for a second set of parameters associated with a second PC process,

third configuration for a first set of subframes (SFs) and for a second set of SFs different from the first set of SFs, and

control information indicating transmission for a physical uplink shared channel (PUSCH) conveying data information in a SF;

determining a modulation and coding scheme (MCS) from a first set of MCS when the SF is in the first set of SFs or from a second set of MCS when the SF is in the second set of SFs, wherein a largest MCS value in the first set of MCS is larger than a largest MCS value in the second set of MCS and a smallest MCS value in the first set of MCS is same as a smallest MCS value in the second set of MCS; and

transmitting the data information using the MCS in the PUSCH in the SF.

16. The method of claim 15, wherein the control information includes a binary field, a binary value of ‘

0’

sets the association of the SF to the first set of SFs, and a binary value of ‘

1’

sets the association of the SF to the second set of SFs.

17. A user equipment (UE), comprising:

a receiver configured to receive;

first configuration for a first set of parameters associated with a first power control (PC) process,

second configuration for a second set of parameters associated with a second PC process,

third configuration for a first set of subframes (SFs) and for a second set of SFs, and

control information indicating transmission for a physical uplink shared channel (PUSCH) conveying data information in a SF;

a controller configured to determine a modulation and coding scheme (MCS) from a first set of MCS when the SF is in the first set of SFs or from a second set of MCS when the SF is in the second set of SFs, wherein a largest MCS value in the first set of MCS is larger than a largest MCS value in the second set of MCS and a smallest MCS value in the first set of MCS is same as a smallest MCS value in the second set of MCS; and

a transmitter configured to transmit the data information using the MCS in the PUSCH in the SF.

18. The UE of claim 17, wherein the control information includes a binary field, a binary value of ‘

0’

sets the association of the SF to the first set of SFs, and a binary value of ‘

1’

sets the association of the SF to the second set of SFs.

19. A base station, comprising:

a transmitter configured to transmit;

first configuration for a first set of parameters associated with a first power control (PC) process,

second configuration for a second set of parameters associated with a second PC process,

third configuration for a first set of subframes (SFs) and for a second set of SFs, and

control information indicating transmission for a physical uplink shared channel (PUSCH) conveying data information in a SF;

a controller configured to determine a modulation and coding scheme (MCS) from a first set of MCS when the SF is in the first set of SFs or from a second set of MCS when the SF is in the second set of SFs, wherein a largest MCS value in the first set of MCS is larger than a largest MCS value in the second set of MCS and a smallest MCS value in the first set of MCS is same as a smallest MCS value in the second set of MCS; and

a receiver configured to receive the data information using the MCS in the PUSCH in the SF.

20. The base station of claim 19, wherein the control information includes a binary field, a binary value of ‘

0’

sets the association of the SF to the first set of SFs, and a binary value of ‘

1’

sets the association of the SF to the second set of SFs.