Granted Patent B2

US 12,621,028 · App. 18/247,190 · Granted May 5, 2026

Inventors: Haitong Sun (Cupertino, CA); Chunhai Yao (Beijing, CN); Chunxuan Ye (San Diego, CA); Dawei Zhang (Saratoga, CA); Hong He (San Jose, CA); Huaning Niu (San Jose, CA); Ismael Gutierrez Gonzalez (San Jose, CA); Oghenekome Oteri (San Diego, CA); Wei Zeng (Saratoga, CA); Weidong Yang (San Diego, CA); Yushu Zhang (Beijing, CN)

Assignee: Apple Inc.

H04B7/0626

Abstract

Claims (44)

1 . A user equipment (UE), comprising:

a transceiver configured to connect to a base station; and

a processor communicatively coupled to the transceiver and configured to perform operations comprising:

receiving a radio resource control (RRC) transmission configuring a maximum number of nonzero power channel state information reference signal (NZP-CSI-RS) resources;

transmitting, to the base station, a first sounding reference signal (SRS) on an uplink (UL) channel;

receiving, from the base station, a first CSI-RS on a downlink (DL) channel, wherein the first CSI-RS includes a first configuration of CSI-RS parameters based on the first SRS, and wherein the first configuration of CSI-RS parameters includes a first number of NZP-CSI-RS resources;

performing first CSI-RS measurements based on the first configuration of CSI-RS parameters;

transmitting, to the base station, a first CSI report including the first CSI-RS measurements;

transmitting, to the base station, a second SRS on the UL channel;

receiving, from the base station, a second CSI-RS on the DL channel, wherein the second CSI-RS includes a second configuration of CSI-RS parameters based on the second SRS, wherein the second configuration of CSI-RS parameters includes a second number of NZP-CSI-RS resources different than the first number of NZP-CSI-RS resources, wherein the second configuration is received via one of a medium access control control element (MAC-CE) transmission or a downlink control information (DCI) transmission, and wherein the second number of NZP-CSI-RS resources is a subset of the maximum number of NZP-CSI-RS resources;

performing second CSI-RS measurements based on the second configuration of CSI-RS parameters; and

transmitting, to the base station, a second CSI report including the second CSI-RS measurements.

2 . The UE of claim 1 , wherein each of the first number of NZP-CSI-RS resources includes a different number of ports, and wherein each of the second number of NZP-CSI-RS resources includes a different number of ports.

3 . The UE of claim 1 , wherein the first configuration of CSI-RS parameters includes a first number of ports for each CSI-RS resource and the second configuration of CSI-RS parameters includes a second number of ports for each CSI-RS resource, and wherein the first number of ports is different than the second number of ports.

4 . The UE of claim 3 , wherein the second number of ports is the same for each CSI-RS resource.

5 . The UE of claim 3 , wherein the operations further comprise:

receiving a radio resource control (RRC) transmission configuring a maximum number of ports.

6 . The UE of claim 5 , wherein the second configuration is received via one of a MAC-CE transmission or DCI transmission, and wherein the second number of ports is a subset of the maximum number of ports.

7 . One or more processors configured to perform operations comprising:

receiving a radio resource control (RRC) transmission configuring a maximum number of nonzero power channel state information reference signal (NZP-CSI-RS) resources;

transmitting, to a base station of a wireless network, a first sounding reference signal (SRS) on an uplink (UL) channel;

receiving, from the base station, a first CSI-RS on a downlink (DL) channel, wherein the first CSI-RS includes a first configuration of CSI-RS parameters based on the first SRS, and wherein the first configuration of CSI-RS parameters includes a first number of NZP-CSI-RS resources;

performing first CSI-RS measurements based on the first configuration of CSI-RS parameters;

transmitting, to the base station, a first CSI report including the first CSI-RS measurements;

transmitting, to the base station, a second SRS on the UL channel;

receiving, from the base station, a second CSI-RS on the DL channel, wherein the second CSI-RS includes a second configuration of CSI-RS parameters based on the second SRS, wherein the second configuration of CSI-RS parameters includes a second number of NZP-CSI-RS resources different than the first number of NZP-CSI-RS resources, wherein the second configuration is received via one of a medium access control control element (MAC-CE) transmission or a downlink control information (DCI) transmission, and wherein the second number of NZP-CSI-RS resources is a subset of the maximum number of NZP-CSI-RS resources;

performing second CSI-RS measurements based on the second configuration of CSI-RS parameters; and

transmitting, to the base station, a second CSI report including the second CSI-RS measurements.

8 . The one or more processors of claim 7 , wherein each of the first number of NZP-CSI-RS resources includes a different number of ports, and wherein each of the second number of NZP-CSI-RS resources includes a different number of ports.

9 . The one or more processors of claim 7 , wherein the first configuration of CSI-RS parameters includes a first number of ports for each CSI-RS resource and the second configuration of CSI-RS parameters includes a second number of ports for each CSI-RS resource, and wherein the first number of ports is different than the second number of ports.

10 . The one or more processors of claim 9 , wherein the second number of ports is the same for each CSI-RS resource.

11 . The one or more processors of claim 9 , wherein the operations further comprise:

receiving a radio resource control (RRC) transmission configuring a maximum number of ports.

12 . The one or more processors of claim 11 , wherein the second configuration is received via one of a MAC-CE transmission or DCI transmission, and wherein the second number of ports is a subset of the maximum number of ports.

13 . A method, comprising:

receiving a radio resource control (RRC) transmission configuring a maximum number of nonzero power channel state information reference signal (NZP-CSI-RS) resources;

transmitting, to a base station, a first sounding reference signal (SRS) on an uplink (UL) channel of a wireless network;

receiving, from the base station, a first CSI-RS on a downlink (DL) channel, wherein the first CSI-RS includes a first configuration of CSI-RS parameters based on the first SRS, and wherein the first configuration of CSI-RS parameters includes a first number of NZP-CSI-RS resources;

performing first CSI-RS measurements based on the first configuration of CSI-RS parameters;

transmitting, to the base station, a first CSI report including the first CSI-RS measurements;

transmitting, to the base station, a second SRS on the UL channel;

receiving, from the base station, a second CSI-RS on the DL channel, wherein the second CSI-RS includes a second configuration of CSI-RS parameters based on the second SRS, wherein the second configuration of CSI-RS parameters includes a second number of NZP-CSI-RS resources different than the first number of NZP-CSI-RS resources, wherein the second configuration is received via one of a medium access control control element (MAC-CE) transmission or a downlink control information (DCI) transmission, and wherein the second number of NZP-CSI-RS resources is a subset of the maximum number of NZP-CSI-RS resources;

performing second CSI-RS measurements based on the second configuration of CSI-RS parameters; and

transmitting, to the base station, a second CSI report including the second CSI-RS measurements.

Assignments (1)

Continuity (1)

References Cited (20)