Granted Patent B2

US 12,750,188 · App. 18/363,483 · Granted Sep 29, 2026

Inventors: Ahmed Abdelaziz Ibrahim Abdelaziz Zewail (San Diego, CA); Jing Sun (San Diego, CA); Xiaoxia Zhang (San Diego, CA); Tao Luo (San Diego, CA)

Assignee: QUALCOMM Incorproated

H04L5/0051H04L25/0238H04W72/1273H04W72/232

Abstract

Claims (64)

1 . A network entity for wireless communication, comprising:

at least one memory; and

at least one processor coupled to the at least one memory, wherein the network entity is configured to:

receive a configured shared demodulation reference signal (DMRS);

determine, based on the configured shared DMRS, blind channel estimation information, wherein the blind channel estimation information comprises channel estimation information determined using one or more detected DMRS tones corresponding to the configured shared DMRS, and wherein the one or more detected DMRS tones are detected based on a blind search for DMRS tones;

receive, based on the blind channel estimation information, control information indicative of a scheduled downlink data transmission; and

receive, based on the blind channel estimation information, the scheduled downlink data transmission, wherein the scheduled downlink data transmission is received based on the control information and using the blind channel estimation information corresponding to the configured shared DMRS.

2 . The network entity of claim 1 , wherein, to receive the scheduled downlink data transmission, the network entity is configured to receive the scheduled downlink data transmission based on reuse of the blind channel estimation information determined based on the configured shared DMRS to demodulate and decode the scheduled downlink data transmission.

3 . The network entity of claim 2 , wherein the configured shared DMRS is associated with the control information and the scheduled downlink data transmission.

4 . The network entity of claim 1 , wherein the control information is a physical downlink control channel (PDCCH) transmission, and wherein the scheduled downlink data transmission is a physical downlink shared channel (PDSCH) transmission.

5 . The network entity of claim 4 , wherein, to receive the control information, the network entity is configured to:

demodulate and decode the PDCCH transmission based on the blind channel estimation information.

6 . The network entity of claim 5 , wherein, to receive the scheduled downlink data transmission, the network entity is configured to:

demodulate and decode the PDSCH transmission based on the blind channel estimation information.

7 . The network entity of claim 1 , wherein:

the control information comprises a physical downlink control channel (PDCCH) transmission associated with a first set of resource elements (REs); and

the scheduled downlink data transmission comprises a physical downlink shared channel (PDSCH) transmission scheduled by the PDCCH and associated with a second set of REs, wherein the second set of REs is adjacent to the first set of REs.

8 . The network entity of claim 1 , wherein the control information includes at least first downlink control information (DCI) indicative of a downlink (DL) grant corresponding to the scheduled downlink data transmission.

9 . The network entity of claim 8 , wherein the control information further includes one or more additional DCIs, and wherein the one or more additional DCIs and the first DCI are multiplexed in a physical downlink control channel (PDCCH) transmission.

10 . The network entity of claim 1 , wherein a bandwidth associated with the configured shared DMRS is equal to a physical downlink shared channel (PDSCH) bandwidth associated with the scheduled downlink data transmission.

11 . The network entity of claim 10 , wherein the PDSCH bandwidth associated with the scheduled downlink data transmission is equal to a physical downlink control channel (PDCCH) bandwidth associated with the control information.

12 . The network entity of claim 1 , wherein the network entity is a user equipment (UE).

13 . A network entity for wireless communication, comprising:

at least one memory; and

at least one processor coupled to the at least one memory, wherein the network entity is configured to:

receive a configured shared demodulation reference signal (DMRS);

determine, based on the configured shared DMRS, blind channel estimation information;

receive, based on the blind channel estimation information, control information indicative of a scheduled downlink data transmission, wherein the control information includes downlink control information (DCI) indicative of a downlink (DL) grant corresponding to the scheduled downlink data transmission;

determine one or more resources associated with the configured shared DMRS are included in a plurality of PDSCH resources of the DL grant; and

receive the scheduled downlink data transmission based on the control information and reuse of the blind channel estimation information corresponding to the configured shared DMRS.

14 . A network entity for wireless communication, comprising:

at least one memory; and

at least one processor coupled to the at least one memory, wherein the network entity is configured to:

receive a configured shared demodulation reference signal (DMRS), wherein the configured shared DMRS is associated with a particular combination of time-frequency resource elements (REs) and a particular DMRS sequence;

determine, based on the configured shared DMRS, blind channel estimation information;

receive, based on the blind channel estimation information, control information indicative of a scheduled downlink data transmission; and

receive, based on the blind channel estimation information, the scheduled downlink data transmission, wherein the scheduled downlink data transmission is received based on the control information and using the blind channel estimation information corresponding to the configured shared DMRS.

15 . The network entity of claim 14 , wherein the network entity is configured to:

receive configuration information indicative of the particular combination of time-frequency REs and the particular DMRS sequence.

16 . The network entity of claim 14 , wherein each physical downlink shared channel (PDSCH) start and length indicator value (SLIV) of a plurality of PDSCH SLIVs corresponds to the configured shared DMRS.

17 . The network entity of claim 16 , wherein each PDSCH SLIV of the plurality of PDSCH SLIVs corresponds to a different number of PDSCH symbols.

18 . The network entity of claim 14 , wherein the particular DMRS sequence corresponds to a unique identifier of the network entity.

19 . The network entity of claim 14 , wherein the network entity is configured to:

search for one or more DMRS tones based on the particular combination of time-frequency REs and the particular DMRS sequence associated with the configured shared DMRS, wherein, to determine the blind channel estimation information, the network entity is configured to perform channel estimation based on one or more detected DMRS tones corresponding to the search for the one or more DMRS tones.

20 . A network entity for wireless communication, comprising:

at least one memory; and

at least one processor coupled to the at least one memory, wherein the network entity is configured to:

receive configuration information indicative of a plurality of shared DMRSs, wherein a configured shared DMRS is included in the plurality of shared DMRSs;

receive the configured shared demodulation reference signal (DMRS);

determine, based on the configured shared DMRS, blind channel estimation information;

receive, based on the blind channel estimation information, control information indicative of a scheduled downlink data transmission; and

receive, based on the blind channel estimation information, the scheduled downlink data transmission, wherein the scheduled downlink data transmission is received based on the control information and using the blind channel estimation information corresponding to the configured shared DMRS.

21 . The network entity of claim 20 , wherein the network entity is configured to:

perform blind channel estimation based on each respective shared DMRS of the plurality of shared DMRSs, wherein, to receive the configured shared DMRS, the network entity is configured to determine the configured shared DMRS as a selection from among the plurality of shared DMRSs.

22 . The network entity of claim 20 , wherein:

the configuration information is indicative of a corresponding physical downlink shared channel (PDSCH) start and length indicator value (SLIV) associated with each respective shared DMRS of the plurality of shared DMRSs.

23 . A network entity for wireless communication, comprising:

at least one memory; and

at least one processor coupled to the at least one memory, wherein the network entity is configured to:

receive a configured shared demodulation reference signal (DMRS);

determine, based on the configured shared DMRS, blind channel estimation information;

receive, based on the blind channel estimation information, control information indicative of a scheduled downlink data transmission; and

receive, based on the blind channel estimation information, the scheduled downlink data transmission, wherein the scheduled downlink data transmission is received based on the control information and using the blind channel estimation information corresponding to the configured shared DMRS, wherein a bandwidth associated with the configured shared DMRS is greater than a physical downlink shared channel (PDSCH) bandwidth associated with the scheduled downlink data transmission.

24 . The network entity of claim 23 , wherein the control information includes a downlink (DL) grant indicative of the PDSCH bandwidth associated with the scheduled downlink data transmission.

Assignments (1)

Continuity (1)

References Cited (9)