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US 10,651,990 B2Granted
Techniques for improving URLLC communications in new radio
AssigneeQUALCOMM Incorporated
InventorsWanshi Chen, Peter Gaal, Jing Jiang
Life of this patent
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Abstract
Various aspects described herein relate to techniques for improving ultra-reliable low-latency communications (URLLC) used in wireless communication systems (e.g., 5G New Radio). In an aspect, a method of wireless communications includes identifying at least a first hybrid automatic repeat request (HARQ) transmission and a second HARQ transmission, wherein at least one of the identified HARQ transmissions is for URLLC, receiving an indication including information of reference signal handling for the identified HARQ transmissions, and performing the reference signal handling based on the information.
Claims22
A method of wireless communications, comprising:
- identifying at least a first hybrid automatic repeat request (HARQ) transmission and a second HARQ transmission, wherein at least one of the identified HARQ transmissions is for ultra-reliable low-latency communications (URLLC);
- for each of the identified HARQ transmissions for URLLC, mapping a transport block (TB) for URLLC to a respective set of resources, wherein the mapping the TB comprises:
- mapping the first HARQ transmission of the TB to a first set of resource elements, and the second HARQ transmission of the TB to a second set of resource elements;
- or
- mapping the first HARQ transmission to a first set of sub-bands across a first component carrier (CC), and the second HARQ transmission to a second set of sub-bands across a second CC;
- receiving an indication including information of reference signal handling for the identified HARQ transmissions;
- performing the reference signal handling based on the information;
- receiving the first HARQ transmission, wherein the first HARQ transmission is precoded for a first service type and transmitted using a first set of antenna ports from a number of antenna ports, wherein each antenna port of the first set of antenna ports is associated with a respective set of resource elements;
- and
- receiving the second HARQ transmission, wherein the second HARQ transmission is precoded for a second service type and transmitted using a second set of antenna ports from a number of antenna ports, wherein each antenna port of the second set of antenna ports is associated with a respective set of resource elements.
7 more elements
A method of wireless communications, comprising:
- identifying at least a first hybrid automatic repeat request (HARQ) transmission and a second HARQ transmission, wherein at least one of the identified HARQ transmissions is for ultra-reliable low-latency communications (URLLC);
- for each of the identified HARQ transmissions for URLLC, mapping a transport block (TB) for URLLC to a respective set of resources, wherein the mapping the TB comprises:
- mapping the first HARQ transmission of the TB to a first set of resource elements, and the second HARQ transmission of the TB to a second set of resource elements;
- or
- mapping the first HARQ transmission to a first set of sub-bands across a first component carrier (CC), and the second HARQ transmission to a second set of sub-bands across a second CC;
- receiving an indication including information of reference signal handling for the identified HARQ transmissions;
- performing the reference signal handling based on the information;
- receiving a first downlink transmission of a TB from a first transmission point (TP);
- receiving the first HARQ transmission of the TB from a second TP, wherein the first HARQ transmission is the first retransmission of the TB;
- and
- receiving the second HARQ transmission of the TB from at least one of the first TP or the second TP, wherein the second HARQ transmission is the second retransmission of the TB.
8 more elements
A method of wireless communications, comprising:
- identifying at least a first hybrid automatic repeat request (HARQ) transmission and a second HARQ transmission, wherein at least one of the identified HARQ transmissions is for ultra-reliable low-latency communications (URLLC);
- for each of the identified HARQ transmissions for URLLC, mapping a transport block (TB) for URLLC to a respective set of resources, wherein the mapping the TB comprises:
- mapping the first HARQ transmission of the TB to a first set of resource elements, and the second HARQ transmission of the TB to a second set of resource elements;
- or
- mapping the first HARQ transmission to a first set of sub-bands across a first component carrier (CC), and the second HARQ transmission to a second set of sub-bands across a second CC;
- receiving a first indication including information of reference signal handling for the identified HARQ transmissions;
- performing the reference signal handling based on the information in the first indication;
- receiving a second indication including information for handling uplink HARQ transmissions;
- identifying at least two uplink HARQ transmissions of a TB;
- selecting a respective set of precodings or phase shifts for each identified uplink HARQ transmission based on the information in the second indication;
- and
- transmitting each of the at least two uplink HARQ transmissions based on the respective set of precodings or phase shifts.
9 more elements
An apparatus for wireless communications, comprising:
- a receiver;
- a memory configured to store instructions;
- and
- at least one processor communicatively coupled to the receiver and the memory, wherein the at least one processor is configured to execute the instructions to:
- identify at least a first hybrid automatic repeat request (HARQ) transmission and a second HARQ transmission, wherein at least one of the identified HARQ transmissions is for ultra-reliable low-latency communications (URLLC);
- for each of the identified HARQ transmissions for URLLC, map a transport block (TB) for URLLC to a respective set of resources, wherein the mapping the TB comprises:
- map the first HARQ transmission of the TB to a first set of resource elements, and the second HARQ transmission of the TB to a second set of resource elements;
- or
- map the first HARQ transmission to a first set of sub-bands across a first component carrier (CC), and the second HARQ transmission to a second set of sub-bands across a second CC;
- receive, via the receiver, an indication including information of reference signal handling for the identified HARQ transmissions;
- perform the reference signal handling based on the information;
- receive, via the receiver, the first HARQ transmission, wherein the first HARQ transmission is precoded for a first service type and transmitted using a first set of antenna ports from a number of antenna ports, wherein each antenna port of the first set of antenna ports is associated with a respective set of resource elements;
- and
- receive, via the receiver, the second HARQ transmission, wherein the second HARQ transmission is precoded for a second service type and transmitted using a second set of antenna ports from a number of antenna ports, wherein each antenna port of the second set of antenna ports is associated with a respective set of resource elements.
11 more elements
An apparatus for wireless communications, comprising:
- a receiver;
- a memory configured to store instructions;
- and
- at least one processor communicatively coupled to the receiver and the memory, wherein the at least one processor is configured to execute the instructions to:
- identify at least a first hybrid automatic repeat request (HARQ) transmission and a second HARQ transmission, wherein at least one of the identified HARQ transmissions is for ultra-reliable low-latency communications (URLLC);
- for each of the identified HARQ transmissions for URLLC, map a transport block (TB) for URLLC to a respective set of resources, wherein the mapping the TB comprises:
- map the first HARQ transmission of the TB to a first set of resource elements, and the second HARQ transmission of the TB to a second set of resource elements;
- or
- map the first HARQ transmission to a first set of sub-bands across a first component carrier (CC), and the second HARQ transmission to a second set of sub-bands across a second CC;
- receive, via the receiver, an indication including information of reference signal handling for the identified HARQ transmissions;
- perform the reference signal handling based on the information;
- receive, via the receiver, a first downlink transmission of a TB from a first transmission point (TP);
- receive, via the receiver, the first HARQ transmission of the TB from a second TP, wherein the first HARQ transmission is the first retransmission of the TB;
- and
- receive, via the receiver, the second HARQ transmission of the TB from at least one of the first TP or the second TP, wherein the second HARQ transmission is the second retransmission of the TB.
12 more elements
An apparatus for wireless communications, comprising:
- a receiver;
- a transmitter;
- a memory configured to store instructions;
- and
- at least one processor communicatively coupled to the receiver, the transmitter and the memory, wherein the at least one processor is configured to execute the instructions to:
- identify at least a first hybrid automatic repeat request (HARQ) transmission and a second HARQ transmission, wherein at least one of the identified HARQ transmissions is for ultra-reliable low-latency communications (URLLC);
- for each of the identified HARQ transmissions for URLLC, map a transport block (TB) for URLLC to a respective set of resources, wherein the mapping the TB comprises:
- map the first HARQ transmission of the TB to a first set of resource elements, and the second HARQ transmission of the TB to a second set of resource elements;
- or
- map the first HARQ transmission to a first set of sub-bands across a first component carrier (CC), and the second HARQ transmission to a second set of sub-bands across a second CC;
- receive, via the receiver, a first indication including information of reference signal handling for the identified HARQ transmissions;
- perform the reference signal handling based on the information in the first indication;
- receive, via the receiver, a second indication including information for handling uplink HARQ transmissions;
- identify at least two uplink HARQ transmissions of a TB;
- select a respective set of precodings or phase shifts for each identified uplink HARQ transmission based on the information in the second indication;
- and
- transmit, via the transmitter, each of the at least two uplink HARQ transmissions based on the respective set of precodings or phase shifts.
14 more elements
Dependencies are inferred from the claim text.