Scheduling uplink transmissions

• US 10,568,081 B2
• Filed: 03/07/2017
• Issued: 02/18/2020
• Est. Priority Date: 03/21/2016
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Papasakellariou, Aris
• Primary Examiner(s): Ohri, Romani
• Application Number:
  US15/452,665
• Publication Number:
  US 20170273056A1
• Time in Patent Office: 1,078 Days
• Field of Search: None
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04W 52/143 Downlink power control
• 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 52/44 in connection with interruption of transmission
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Methods and apparatus are provided for scheduling transmissions of data channels, control channels, or random access channels using downlink control information (DCI) formats. A DCI format can configure a transmission of one or multiple data channels over respective one or multiple transmission time intervals. A first DCI format can configure the parameters for a channel transmission and a second DCI format can trigger the channel transmission and indicate respective one or more transmission time intervals.

Claims

1. A user equipment (UE), comprising:

a receiver configured to receive a downlink control information (DCI) format that configures transmissions of a number of physical uplink data channels (PUSCHs) over a number of subframes up to a predetermined maximum number of N_SF subframes, wherein the DCI format includes;

a number of subframes field that is represented by ┌

log₂(N_SF)┐

bits and indicates a number n_SF≤

N_SF of subframes for n_SF PUSCH transmissions,

a timing offset field that includes a timing offset o_i for a subframe of a first of the PUSCH transmissions that is determined as n+k+o_i, wherein n is a subframe of the DCI format reception and k is a minimum number of subframes for a PUSCH transmission after the DCI format reception,

a hybrid automatic repeat request (HARQ) process number field that is represented by ┌

log₂(N_HARQ)┐

bits and indicates a HARQ process number n_HARQ from a total of N_HARQ HARQ processes, wherein HARQ process number n_HARQ applies for the first PUSCH transmission, HARQ process number (n_HARQ+j−

1)mod N_HARQ applies for a j-th of the PUSCH transmissions, and 1≤

j≤

n_SF, and

a new data indicator (NDI) field that is represented by N_SF bits and indicates whether a PUSCH transmission, from the n_SF PUSCH transmissions, conveys a new data transport block (TB) or a retransmission of a data TB; and

a transmitter configured to transmit the n_SF PUSCH transmissions over the n_SF subframes,

wherein is a ceiling function that rounds a number to its immediately next larger integer and log₂(x) is a logarithm function with base 2 for a number x.

2. The UE of claim 1, wherein:

a PUSCH transmission is over a maximum number of M₁ interlaces wherein an interlace has an index m₁, 0≤

m₁≤

M₁, and includes a number of equidistant non-contiguous resource blocks of a system bandwidth, and

the DCI format includes a resource allocation field that is represented by ┌

log₂(M₁·

(M₁+1)/2)┐

bits and assigns to a PUSCH transmission either a number of consecutive interlace indexes or a combination of interlace indexes from a predetermined set of combinations of interlace indexes.

3. The UE of claim 1, wherein:

the DCI format includes a redundancy version field that is represented by a number of bits, and

the number of bits is smaller than a second number of bits that represents a redundancy version field included in a second DCI format that schedules a PUSCH transmission over a single subframe.

4. The UE of claim 1, wherein:

the DCI format includes a transmission power control (TPC) command field that adjusts a PUSCH transmission power, and

the same power adjustment applies to all n_SF PUSCH transmissions.

5. The UE of claim 1, wherein:

the DCI format includes a channel state information (CSI) request field that indicates a transmission of a CSI report, and

the CSI report is multiplexed in the first PUSCH transmission.

6. The UE of claim 1, wherein:

the DCI format includes a channel state information (CSI) request field that indicates a transmission of one or more CSI reports, and

a PUSCH that includes a CSI report is transmitted with larger power than a PUSCH that does not include a CSI report.

7. The UE of claim 1, wherein the DCI format includes a flag field indicating whether the fields of the DCI format correspond to either scheduling a PUSCH transmission over a single subframe or to scheduling multiple PUSCH transmissions over respective multiple subframes.

8. A base station, comprising:

a transmitter configured to transmit a downlink control information (DCI) format that configures transmission of a number of physical uplink data channels (PUSCHs) over a number of subframes up to a predetermined maximum number of N_SF subframes, wherein the DCI format includes;

a number of subframes field that is represented by ┌

log₂(N_SF)┐

bits and indicates a number n_SF≤

N_SF of subframes for n_SF PUSCH transmissions,

a timing offset field that includes a timing offset o_i for a subframe of a first of the PUSCH transmissions that is determined as n+k+o_i, wherein n is a subframe of the DCI format reception and k is a minimum number of subframes for a PUSCH transmission after the DCI format transmission,

a hybrid automatic repeat request (HARQ) process number field that is represented by ┌

log₂(N_HARQ)┐

bits and indicates a HARQ process number n_HARQ from a total of N_HARQ HARQ processes, wherein HARQ process number n_HARQ applies for the first PUSCH transmission, HARQ process number (n_HARQ+j−

1)mod N_HARQ applies for a j-th of the PUSCH transmissions, and 1≤

j≤

n_SF, and

a new data indicator (NDI) field that is represented by N_SF bits and indicates whether a PUSCH transmission, from the n_SF PUSCH transmissions, conveys a new data transport block (TB) or a retransmission of a data TB; and

a receiver configured to receive the n_SF PUSCH transmissions over the n_SF subframes,

wherein is a ceiling function that rounds a number to its immediately next larger integer and log₂(x) is a logarithm function with base 2 for a number x.

9. The base station of claim 8, wherein

a PUSCH transmission is over a maximum number of M₁ interlaces wherein an interlace has an index m₁, 0≤

m₁≤

M₁, and includes a number of equidistant non-contiguous resource blocks of a system bandwidth, and

the DCI format includes a resource allocation field that is represented by ┌

log₂(M₁·

(M₁+1)/2)┐

bits and assigns to a PUSCH transmission either a number of consecutive interlace indexes or a combination of interlace indexes from a predetermined set of combinations of interlace indexes.

10. The base station of claim 8, wherein

the DCI format includes a redundancy version field that is represented by a number of bits, and

the number of bits is smaller than a second number of bits that represents a redundancy version field included in a second DCI format that schedules a PUSCH transmission over a single subframe.

11. The base station of claim 8, wherein

the DCI format includes a channel state information (CSI) request field that indicates a transmission of a CSI report, and

the CSI report is multiplexed in the first PUSCH transmission.

12. A user equipment (UE), comprising:

a receiver configured to receive;

a first downlink control information (DCI) format in a subframe having a first index that configures parameters for a transmission of a channel, and

a second DCI format in a subframe having a second index that triggers the transmission of the channel; and

a transmitter configured to transmit the channel in a subframe having a third index,

wherein the second DCI format indicates a configuration for a subframe that includes a number of symbols, and

wherein a first number consecutive subframe symbols supports reception of signals and a second number of last consecutive subframe symbols supports transmission of signals.

13. The UE of claim 12, wherein the channel is a physical random access channel or a physical uplink data channel.

14. A user equipment (UE), comprising:

a receiver configured to receive;

a first downlink control information (DCI) format in a subframe having a first index that configures parameters for a transmission of a channel, and

a second DCI format in a subframe having a second index that triggers the transmission of the channel; and

a transmitter configured to transmit the channel in a subframe having a third index,

wherein the second DCI format indicates an offset, and

wherein the index of the third subframe is determined as a sum of the index of the second subframe and the offset.

15. The UE of claim 14, wherein the offset has a smaller value than a difference between a fifth subframe index of the channel transmission and a fourth subframe index of transmission of the first DCI format when the first DCI format also triggers the channel transmission.

16. A base station, comprising:

a transmitter configured to transmit;

a first downlink control information (DCI) format in a subframe having a first index that configures parameters for a reception of a channel, and

a second DCI format in a subframe having a second index that triggers the reception of the channel; and

a receiver configured to receive the channel in a subframe having a third index,

wherein the second DCI format indicates a configuration for a subframe that includes a number of symbols, and

wherein a first number consecutive subframe symbols supports transmission of signals and a second number of last consecutive subframe symbols supports reception of signals.

17. The base station of claim 16, wherein the channel is a physical random access channel or a physical uplink data channel.

18. A base station, comprising:

a transmitter configured to transmit;

a first downlink control information (DCI) format in a subframe having a first index that configures parameters for a reception of a channel, and

a second DCI format in a subframe having a second index that triggers the reception of the channel; and

a receiver configured to receive the channel in a subframe having a third index,

wherein the second DCI format indicates an offset, and

wherein the index of the third subframe is determined as a sum of the index of the second subframe and the offset.