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US 10,952,196 B2Granted
DMRS indication for transmissions scheduled by fallback DCI in NR
AssigneeQUALCOMM Incorporated
InventorsWooseok Nam, Tao Luo, Alexandros Manolakos, Wanshi Chen, Peter Gaal, Heechoon Lee
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Abstract
Aspects of the disclosure relate to a configurable demodulation reference signal (DMRS) when utilizing a fallback downlink control information (DCI) format that lacks DMRS antenna port information or DMRS sequence initialization information. The DMRS configuration may be identified based on one or more semi-static and/or dynamic parameters, such as a cell identifier, cell radio network temporary identifier, DMRS scrambling identifier, subframe number and/or slot index.
Claims31
A method of wireless communication in a wireless communication network for a scheduled entity to communicate with a scheduling entity, the method comprising:
- receiving downlink control information (DCI) comprising a DCI format, the DCI format comprising scheduling information that lacks at least a portion of demodulation reference signal (DMRS) scheduling information for a DMRS;
- determining one or more parameters, wherein the one or more parameters comprise at least one of semi-static parameters or dynamic parameters;
- identifying a DMRS configuration of the DMRS, wherein the DMRS configuration comprises at least antenna port information and DMRS sequence initialization information identified based on the one or more parameters, wherein identifying the DMRS configuration of the DMRS further comprises:
- calculating a modular of a DMRS scrambling identifier or a cell identifier to determine the antenna port information, wherein the modular is selected based on at least one of a DMRS configuration type or a DMRS maximum length;
- and
- communicating the DMRS associated with an uplink transmission or a downlink transmission between the scheduled entity and the scheduling entity using the DMRS configuration.
3 more elements
A method of wireless communication in a wireless communication network for a scheduled entity to communicate with a scheduling entity, the method comprising:
- receiving downlink control information (DCI) comprising a DCI format, the DCI format comprising scheduling information that lacks at least a portion of demodulation reference signal (DMRS) scheduling information for a DMRS;
- determining one or more parameters, wherein the one or more parameters comprise at least one of semi-static parameters or dynamic parameters;
- identifying a DMRS configuration of the DMRS, wherein the DMRS configuration comprises at least antenna port information and DMRS sequence initialization information identified based on the one or more parameters, wherein identifying the DMRS configuration of the DMRS further comprises:
- calculating a modular of a summation of a slot index and one of a DMRS scrambling identifier or a cell identifier to determine the antenna port information, wherein the modular is selected based on at least one of a DMRS configuration type or a DMRS maximum length;
- and
- communicating the DMRS associated with an uplink transmission or a downlink transmission between the scheduled entity and the scheduling entity using the DMRS configuration.
3 more elements
A scheduled entity in a wireless communication network, comprising:
- a processor;
- a transceiver communicatively coupled to the processor and configured to wirelessly communicate with a scheduling entity;
- and
- a memory communicatively coupled to the processor;
- wherein the processor is configured to:
- receive downlink control information (DCI) comprising a DCI format via the transceiver, the DCI format comprising scheduling information that lacks at least a portion of demodulation reference signal (DMRS) scheduling information for a DMRS;
- determine one or more parameters, wherein the one or more parameters comprise at least one of semi-static parameters or dynamic parameters;
- identify a DMRS configuration of the DMRS, wherein the DMRS configuration comprises at least antenna port information and DMRS sequence initialization information identified based on the one or more parameters, comprising:
- calculating a modular of a DMRS scrambling identifier or a cell identifier to determine the antenna port information, wherein the modular is selected based on at least one of a DMRS configuration type or a DMRS maximum length;
- and
- communicating the DMRS associated with an uplink transmission or a downlink transmission between the scheduled entity and the scheduling entity using the DMRS configuration.
8 more elements
A scheduled entity in a wireless communication network, comprising:
- a processor;
- a transceiver communicatively coupled to the processor and configured to wirelessly communicate with a scheduling entity;
- and
- a memory communicatively coupled to the processor;
- wherein the processor is configured to:
- receive downlink control information (DCI) comprising a DCI format via the transceiver, the DCI format comprising scheduling information that lacks at least a portion of demodulation reference signal (DMRS) scheduling information for a DMRS;
- determine one or more parameters, wherein the one or more parameters comprise at least one of semi-static parameters or dynamic parameters;
- identify a DMRS configuration of the DMRS, wherein the DMRS configuration comprises at least antenna port information and DMRS sequence initialization information identified based on the one or more parameters, comprising:
- calculating a modular of a summation of a slot index and one of a DMRS scrambling identifier or a cell identifier to determine the antenna port information, wherein the modular is selected based on at least one of a DMRS configuration type or a DMRS maximum length;
- and
- communicating the DMRS associated with an uplink transmission or a downlink transmission between the scheduled entity and the scheduling entity using the DMRS configuration.
8 more elements
Dependencies are inferred from the claim text.