US 2022/0104237 A1Published application

Method for differentiating multiple physical downlink shared channel (pdsch) transmission schemes

AssigneeTelefonaktiebolaget LM Ericsson (publ)

InventorsSiva Muruganathan, Sebastian Faxér, Mattias Frenne, Shiwei Gao, Simon Järmyr

Life of this patent

Estimating the term…

Loading patent…

Abstract

A method for differentiating multiple Physical Downlink Shared Channel (PDSCH) transmission schemes. In a non-limiting example, the PDSCH transmission schemes include a spatial multiplexing transmission scheme, a frequency multiplexing transmission scheme, a slot-based time multiplexing transmission scheme, and a mini-slot-based time multiplexing transmission scheme. In examples discussed herein, a User Equipment (UE) can be configured to differentiate the PDSCH transmission schemes based on information indicated in Downlink Control Information (DCI) for scheduling a PDSCH transmission, information signaled to the UE via a higher layer configuration, and/or capability signaling indicated from the UE to a network. By differentiating the PDSCH transmission schemes, the UE can efficiently receive a data transmission(s) from multiple Transmission/Reception Points (TRPs).

Claims28

Dependent claims

A method performed by a User Equipment (UE) in a cellular communications system, the method comprising:

receiving control signaling from a network for scheduling one or more Physical Downlink Shared Channel (PDSCH) transmissions, the one or more PDSCH transmissions comprise a first transmission associated with a first Transmission Configuration Indication (TCI) state and a second transmission associated with a second TCI state;
determining one or more PDSCH transmission schemes among a plurality of PDSCH transmission schemes for receiving the one or more PDSCH transmissions from the network based on one or more of:
information indicated in Downlink Control Information (DCI) scheduling the one or more PDSCH transmissions;
information signaled to the UE via a higher layer configuration;
and
capability signaling indicated from the UE to the network;
and
receiving the one or more PDSCH transmissions in accordance with the determined one or more PDSCH transmission schemes;
wherein:
determining the one or more PDSCH transmission schemes among the plurality of PDSCH transmission schemes for receiving the one or more PDSCH transmissions comprises determining one of the following PDSCH transmission schemes:
a spatial multiplexing transmission scheme;
a frequency multiplexing transmission scheme;
a slot-based time multiplexing transmission scheme;
and
a mini-slot-based time multiplexing transmission scheme;
the one or more PDSCH transmission schemes are determined based on the information indicated in the DCI scheduling the one or more PDSCH transmissions, the DCI comprises one or more of:
an antenna ports field in the DCI that indicates a number of Demodulation Reference Signal (DMRS) Code Division Multiplexing (CDM) groups to which DMRS ports indicated by the antenna ports field belong;
a transmission configuration indication field that indicates a number of TCI states to be applied to the one or more PDSCH transmissions;
and
Time Domain Resource Allocation (TDRA) information indicated in the DCI, the TDRA information comprising information on a starting symbol in a respective slot for PDSCH reception and a length or duration of PDSCH reception;
and
determining one PDSCH transmission scheme among the plurality of PDSCH transmission schemes comprises determining the slot-based time multiplexing scheme if:
the DCI transmission configuration indication field indicates at least two TCI states;
the antenna ports field in the DCI indicates the DMRS ports belonging to one DMRS CDM group;
and
the UE is configured with the higher layer configuration to have the PDSCH duration longer than one slot.

23 more elements

A wireless device comprising:

processing circuitry configured to:
receive control signaling from a network for scheduling one or more Physical Downlink Shared Channel (PDSCH) transmissions, the one or more PDSCH transmissions comprise a first transmission associated with a first Transmission Configuration Indication (TCI) state and a second transmission associated with a second TCI state;
determine one or more PDSCH transmission schemes among a plurality of PDSCH transmission schemes for receiving the one or more PDSCH transmissions from the network based on one or more of:
information indicated in Downlink Control Information (DCI) scheduling the one or more PDSCH transmissions;
information signaled to the wireless device via a higher layer configuration;
and
capability signaling indicated from the wireless device to the network;
and
receive the one or more PDSCH transmissions in accordance with the determined one or more PDSCH transmission schemes;
wherein:
the processing circuitry is further adapted to determine one of the following PDSCH transmission schemes:
a spatial multiplexing transmission scheme;
a frequency multiplexing transmission scheme;
a slot-based time multiplexing transmission scheme;
and
a mini-slot-based time multiplexing transmission scheme;
the information indicated in the DCI scheduling the one or more PDSCH transmissions comprises one or more of:
an antenna ports field in the DCI that indicates a number of Demodulation Reference Signal (DMRS) Code Division Multiplexing (CDM) groups to which DMRS ports indicated by the antenna ports field belong;
a transmission configuration indication field that indicates a number of TCI states to be applied to the one or more PDSCH transmissions;
and
Time Domain Resource Allocation (TDRA) information indicated in the DCI, the TDRA information comprising information on a starting symbol in a respective slot for PDSCH reception and a length or duration of PDSCH reception;
and
the processing circuitry is further adapted to determine that a PDSCH transmission scheme among the plurality of PDSCH transmission schemes comprises a slot-based time multiplexing scheme if:
the DCI transmission configuration indication field indicates at least two TCI states;
the antenna ports field in the DCI indicates the DMRS ports belonging to one DMRS CDM group;
and
the UE is configured with the higher layer configuration to have the PDSCH duration longer than one slot;
and
power supply circuitry configured to supply power to the wireless device.

26 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/600,000Filed 30 Mar 2020
Priority: 29 Mar 2019
Published: 31 Mar 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04L 5/0035
Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation: resource allocation in a cooperative…
H04W 72/1273
Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows: of downlink data flows
H04L 5/0023
Three-dimensional division: time-frequency-space
H04L 5/0051
Allocation of pilot signals, i.e. of signals known to the receiver: of dedicated pilots, i.e. pilots destined for a single user or terminal