Method for differentiating multiple physical downlink shared channel (PDSCH) transmission schemes
A method for differentiating multiple Physical Downlink Shared Channel (PDSCH) transmission schemes for transmission of data for an over-the-top (OTT) service. 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) to obtain user data from the OTT service.
1. A host configured to operate in a communication system to provide an over-the-top (OTT) service, the host comprising:
processing circuitry configured to process user data; and
a network interface configured to initiate transmission of the user data via a network node in a cellular network to a user equipment (UE), the network node having a communication interface and processing circuitry configured to perform operations comprising:
sending control signaling to the UE 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 sending the one or more PDSCH transmissions based on:
information indicated in Downlink Control Information (DCI) scheduling the one or more PDSCH transmissions, and
information signaled to the UE via a higher layer configuration; and
sending the one or more PDSCH transmissions to the UE in accordance with the determined one or more PDSCH transmission schemes, the one or more PDSCH transmissions comprising the user data from the host to provide the OTT service;
wherein determining the one or more PDSCH transmission schemes among the plurality of PDSCH transmission schemes for sending 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;
wherein 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 comprising:
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
wherein 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.
2. The host of claim 1 , wherein:
the processing circuitry of the host is configured to execute a host application associated with the OTT service that processes the user data from a client application associated with the OTT service, the client application configured to transmit user data to the host application and/or receive the user data from the host application.
3. The host of claim 1 , wherein sending control signaling for scheduling one or more Physical Downlink Shared Channel (PDSCH) transmissions comprises sending control signaling from a network for scheduling two or more Physical Downlink Shared Channel (PDSCH) transmissions.
4. The host of claim 1 , wherein the one or more PDSCH transmission schemes are determined based on the higher layer configuration information comprising:
a number of repetitions defined in terms of multiple slots configured to the UE.
5. The host of claim 1 , wherein determining the one PDSCH transmission scheme among the plurality of PDSCH transmission schemes further comprises determining the frequency multiplexing scheme if:
the DCI transmission configuration indication field indicates more than one TCI state;
the antenna ports field in the DCI indicates the DMRS ports belonging to one DMRS CDM group; and
the higher layer configuration having a value representative of a frequency multiplexing scheme.
6. The host of claim 1 , wherein the first transmission and the second transmission are for a same transport block.
7. A communication system configured to provide an over-the-top (OTT) service, the communication system comprising:
a host comprising:
processing circuitry configured to process user data associated with a user equipment (UE), the user data being associated with the OTT service; and
a network interface configured to initiate transmission of the user data via a network node from the UE;
the network node, the network node having a communication interface and processing circuitry configured to:
send control signaling to the UE 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 sending the one or more PDSCH transmissions based on:
information indicated in Downlink Control Information (DCI) scheduling the one or more PDSCH transmissions, and
information signaled to the UE via a higher layer configuration; and
send the one or more PDSCH transmissions to the UE in accordance with the determined one or more PDSCH transmission schemes, the one or more PDSCH transmissions comprising the user data from the host to provide the OTT service;
wherein the determining the one or more PDSCH transmission schemes among the plurality of PDSCH transmission schemes for sending 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;
wherein 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 comprising:
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
wherein determining the one or more PDSCH transmission schemes 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.
8. The communication system of claim 7 , further comprising:
at the host, executing a host application associated with the OTT service.
9. The communication system of claim 7 , further comprising the UE, the UE having a client application, associated with the OTT service, stored in a computer-readable storage medium and executable by the UE to process the user data associated with the OTT service.
10. The communication system of claim 7 , wherein sending control signaling for scheduling one or more Physical Downlink Shared Channel (PDSCH) transmissions comprises sending control signaling from a network for scheduling two or more Physical Downlink Shared Channel (PDSCH) transmissions.
11. The communication system of claim 7 , wherein the one or more PDSCH transmission schemes are determined based on the higher layer configuration information comprising:
a number of repetitions defined in terms of multiple slots configured to the UE.
12. The communication system of claim 7 , wherein determining the one PDSCH transmission scheme among the plurality of PDSCH transmission schemes further comprises determining the frequency multiplexing scheme if:
the DCI transmission configuration indication field indicates more than one TCI state;
the antenna ports field in the DCI indicates the DMRS ports belonging to one DMRS CDM group; and
the higher layer configuration having a value representative of a frequency multiplexing scheme.
13. The communication system of claim 7 , wherein the first transmission and the second transmission are for a same transport block.
14. A computer-readable storage medium having an executable client application stored thereon, the client application being associated with an over-the-top (OTT) service and executable on a user equipment (UE) to receive user data from a host application associated with a the OTT service via a wireless communication network, the client application being operable to request transmission of the user data from the host application by processing circuitry and transceiver circuitry of the UE, the UE being further configured to perform operations comprising:
receiving control signaling from a network node for scheduling one or more Physical Downlink Shared Channel (PDSCH) transmissions, the one or more PDSCH transmissions comprising 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 node based on:
information indicated in Downlink Control Information (DCI) scheduling the one or more PDSCH transmissions, and
information signaled to the UE via a higher layer configuration; and
receiving the one or more PDSCH transmissions in accordance with the determined one or more PDSCH transmission schemes, the one or more PDSCH transmissions comprising the user data from the host to the client application to provide the OTT service;
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;
wherein 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 comprising:
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
wherein determining one PDSCH transmission scheme among the plurality of PDSCH transmission schemes comprises determining the determining the frequency multiplexing scheme if:
the DCI transmission configuration indication field indicates more than one TCI state,
the antenna ports field in the DCI indicates the DMRS ports belonging to one DMRS CDM group, and
the higher layer configuration having a value representative of a frequency multiplexing scheme.
15. The computer-readable storage medium of claim 14 , wherein the host application cooperates with the client application to request transmission of the user data by the UE.
16. The computer-readable storage medium of claim 14 , wherein receiving control signaling for scheduling one or more Physical Downlink Shared Channel (PDSCH) transmissions comprises receiving control signaling from the network node for scheduling two or more Physical Downlink Shared Channel (PDSCH) transmissions.
17. The computer-readable storage medium of claim 14 , wherein the one or more PDSCH transmission schemes are determined based on the higher layer configuration information comprising:
a number of repetitions defined in terms of multiple slots configured to the UE.
18. The computer-readable storage medium of claim 14 , wherein determining the one PDSCH transmission scheme among the plurality of PDSCH transmission schemes further comprises determining the frequency multiplexing scheme if:
the DCI transmission configuration indication field indicates more than one TCI state;
the antenna ports field in the DCI indicates the DMRS ports belonging to one DMRS CDM group; and
the higher layer configuration having a value representative of a frequency multiplexing scheme.
19. The computer-readable storage medium of claim 14 , wherein the first transmission and the second transmission are for a same transport block.