SCHEDULING UPLINK TRANSMISSIONS

• US 20170273056A1
• Filed: 03/07/2017
• Published: 09/21/2017
• Est. Priority Date: 03/21/2016
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Papasakellariou, Aris
• Granted Patent: US 10,568,081 B2
• Time in Patent Office: Days
• 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_t for a subframe of a first of the PUSCH transmissions that is determined as n+k+o_t, 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)modN_HARQ applies for a j-th of the PUSCH transmissions, and 1≦

j≦

n_SF,

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 resulting a logarithm with base 2 for number x.

2. The UE of claim 1, wherein:

a PUSCH transmission is over a maximum number of M_I interlaces wherein an interlace has an index m_I, 0≦

m_I<

M_I, 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(M_I·

(M_I+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 adjustement 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_t for a subframe of a first of the PUSCH transmissions that is determined as n+k+o_t, wherein n is a subframe of the DCI format transmission 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)modN_HARQ applies for a j-th of the PUSCH transmissions, and 1<

j≦

n_SF,

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 resulting a logarithm with base 2 for number x.

9. The base station of claim 8, wherein

a PUSCH transmission is over a maximum number of M_I interlaces wherein an interlace has an index m_I, 0≦

m_I<

M_I, 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(M_I·

(M+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.

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

14. The UE of claim 12, wherein:

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

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

15. The UE of claim 12, wherein:

the second DCI format indicates an offset, and

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

16. The UE of claim 15, 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.

17. 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.

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

19. The base station of claim 17, wherein:

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

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

20. The base station of claim 17, wherein

the second DCI format indicates an offset, and

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