Physical uplink shared channel enhancements for transmission with configured grant in unlicensed spectrum

Patent metadata

Field	Value
Publication number	US-2020404655-A1
Application number	US-202016905497-A
Country	US
Kind code	A1
Filing date	Jun 18, 2020
Priority date	Jun 21, 2019
Publication date	Dec 24, 2020
Grant date	—

Abstract

Aspects of the present application provide for flexibility in configuring channel access occasions for uplink transmissions within a configured grant transmission resource duration. The uplink transmission may be transmitted in the physical uplink shared channel (PUSCH). The configured grant transmission resource duration includes multiple orthogonal frequency division multiplexed (OFDM) symbols. In some implementations, resources for uplink transmissions are allocated such that an integer number of equally sized mini-slots, each of which is considered a separate PUSCH, fit within the slot. This occurs when the number of OFDM symbols within the slot is evenly divisible by the number of OFDM symbols in the mini-slot. In some embodiments, not all of the mini-slots in the slot are equal in size. This occurs when the number of OFDM symbols within the slot is not evenly divisible by a particular mini-slot size.

First claim

1 . A method for a user equipment (UE) using configured grant (CG) for uplink transmission in unlicensed spectrum, the method comprising:
receiving, at the UE from a network device, CG resource configuration information including time domain resource configuration information to configure the UE for a number of CG consecutive physical uplink shared channel (PUSCH) allocations within a slot of a CG time resource, the time domain resource configuration information comprising an indication of a start symbol and a fixed length of a first PUSCH allocation within a slot of the CG time resource; and wherein the time domain resource configuration information defines multiple access occasions for the UE to start a CG uplink transmission within the CG time resource, each access occasion starting at a starting symbol of a corresponding PUSCH of the number of CG consecutive PUSCH allocations; starting the CG uplink transmission at a first access occasion before which a listen-before-talk (LBT) channel access procedure is successful; and transmitting consecutive CG PUSCHs in the remaining access occasions in accordance with the CG consecutive PUSCH allocations.

2 . The method of claim 1 , wherein the UE is configured with a number of repetitions, K, is greater than 1 and the UE repeats a transmission block (TB) in K earliest consecutive transmission occasion candidates within a same configuration.

3 . The method of claim 1 , wherein for the number of CG consecutive PUSCH allocations within a slot, the first PUSCH allocation follows a configured Start and Length Indicator Value (SLIV) parameter, and remaining PUSCH allocations have a same length and PUSCH mapping type, and are appended following previous allocations without any gaps.

4 . The method of claim 3 , wherein a same combination of start symbol and length and PUSCH mapping type repeats over consecutively allocated slots.

5 . The method of claim 1 further comprising configuring a plurality of PUSCH allocations within a slot of the CG time resource based upon the fixed length of the first PUSCH allocation and a number of a plurality of orthogonal frequency division multiplexed (OFDM) symbols available for CG uplink transmission in a first slot of the CG time resource.

6 . The method of claim 5 , wherein configuring the plurality of PUSCH allocations comprises at least one of:
configuring at least one PUSCH allocation that is equal to the fixed length of the first PUSCH allocation; configuring at least one PUSCH allocation that is equal to the fixed length of the first PUSCH allocation and a PUSCH allocation that is less than the fixed length of the first PUSCH allocation; and configuring at least one PUSCH allocation that is equal to the fixed length of the first PUSCH allocation and a PUSCH allocation that is greater than the fixed length of the first PUSCH allocation.

7 . The method of claim 1 , wherein the receiving, at the UE from the network device, the CG resource configuration information comprises receiving the CG resource configuration in:
a radio resource control (RRC) message; or a combination of a RRC message and downlink control information (DCI).

8 . An apparatus comprising:
a processor; and a computer-readable medium, having stored thereon, computer executable instructions, that when executed by the processor, cause the apparatus to:
receive, from a network device, configured grant (CG) resource configuration information including time domain resource configuration information to configure the UE for a number of CG consecutive physical uplink shared channel (PUSCH) allocations within a slot of a CG time resource, the time domain resource configuration information comprising an indication of a start symbol and a fixed length of a first PUSCH allocation within a slot of the CG time resource; and
wherein the time domain resource configuration information defines multiple access occasions for the UE to start a CG uplink transmission within the CG time resource, each access occasion starting at a starting symbol of a corresponding PUSCH of the number of CG consecutive PUSCH allocations;
start the CG uplink transmission at a first access occasion before which a listen-before-talk (LBT) channel access procedure is successful; and
transmit consecutive CG PUSCHs in the remaining access occasions in accordance with the CG consecutive PUSCH allocations.

9 . The apparatus of claim 8 , wherein the UE is configured with a number of repetitions, K, is greater than 1 and the UE repeats a transmission block (TB) in K earliest consecutive transmission occasion candidates within a same configuration.

10 . The apparatus of claim 8 , wherein for the number of CG consecutive PUSCH allocations within a slot, the first PUSCH allocation follows a configured Start and Length Indicator Value (SLIV) parameter, and remaining PUSCH allocations have a same length and PUSCH mapping type, and are appended following previous allocations without any gaps.

11 . The apparatus of claim 10 , wherein a same combination of start symbol and length and PUSCH mapping type repeats over consecutively allocated slots.

12 . The apparatus of claim 8 further comprising configuring a plurality of PUSCH allocations in the CG time resource based upon the fixed length of the first PUSCH allocation and a number of a plurality of orthogonal frequency division multiplexed (OFDM) symbols available for CG uplink transmission in a first slot of the CG time resource.

13 . The apparatus of claim 12 , wherein configuring the plurality of PUSCH allocations comprises at least one of:
configuring at least one PUSCH allocation that is equal to the fixed length of the first PUSCH allocation; configuring at least one PUSCH allocation that is equal to the fixed length of the first PUSCH allocation and a PUSCH allocation that is less than the fixed length of the first PUSCH allocation; and configuring at least one PUSCH allocation that is equal to the fixed length of the first PUSCH allocation and a PUSCH allocation that is greater than the fixed length of the first PUSCH allocation.

14 . The apparatus of claim 8 , wherein the receiving the CG resource configuration information comprises receiving the CG resource configuration in:
a radio resource control (RRC) message; or a combination of a RRC message and downlink control information (DCI).

15 . A method for use in a network device comprising:
transmitting, by the network device to a user equipment (UE), configured grant (CG) resource configuration information including time domain resource configuration information to configure the UE for a number of CG consecutive physical uplink shared channel (PUSCH) allocations within a slot of a CG time resource, the time domain resource configuration information comprising an indication of a start symbol and a fixed length of a first PUSCH allocation within a slot of the CG time resource; and wherein the time domain resource configuration information defines multiple access occasions for the UE to start a CG uplink transmission within the CG time resource, each access occasion starting at a starting symbol of a corresponding PUSCH of the number of CG consecutive PUSCH allocations; receiving the CG uplink transmission at a first access occasion before which a listen-before-talk (LBT) channel access procedure is successful; and receiving consecutive CG PUSCHs in the remaining access occasions in accordance with the CG consecutive PUSCH allocations.

16 . The method of claim 15 , wherein the CG resource configuration information for configuring the UE comprises a number of repet

Assignees

• Salem Mohamed Adel
• Huawei Tech Co Ltd

Inventors

• Salem Mohamed Adel

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/231

  the control data signalling from the layers above the physical layer, e.g. RRC or MAC-CE signalling · CPC title

• H04W72/232 Primary

  the control data signalling from the physical layer, e.g. DCI signalling · CPC title

• H04W74/0808

  using carrier sensing, e.g. carrier sense multiple access [CSMA] · CPC title

• H04W72/1268

  of uplink data flows · CPC title