Granted Patent B2

US 12,520,128 · App. 18/035,490 · Granted Jan 6, 2026

Inventors: Alexandros Manolakos (Escondido, CA); Alberto Rico Alvarino (San Diego, CA); Timo Ville Vintola (San Diego, CA)

Assignee: QUALCOMM Incorporated

H04W8/22H04B7/0639H04L5/0051H04W72/1268H04W72/231

Abstract

Claims (109)

1 . A method for wireless communication by a user equipment (UE), comprising:

transmitting, to a network node, an uplink capability message indicating a coherent uplink multiple-in-multiple-out (MIMO) capability associated with coherent transmission characteristics;

receiving, from the network node, a switch parameter that configures the UE for uplink switching;

receiving, from the network node, a switching message that triggers the uplink switching at a time period that is after a reference signal (RS) transmission and prior to a scheduled data communication; and

transmitting, to the network node, data in accordance with the scheduled data communication according to one or more non-coherent transmission characteristics based on the uplink switching being triggered after the RS transmission and prior to the scheduled data communication.

2 . The method of claim 1 , wherein:

the coherent transmission characteristics are associated with a coherent transmitted precoding matrix indicator (TPMI); and

the one or more non-coherent transmission characteristics are associated with a non-coherent TPMI.

3 . The method of claim 1 , wherein the coherent transmission characteristics comprise both:

a first maximum allowable difference between a first phase of the data communication and a second phase of a last RS transmission, and

a second maximum allowable difference between a first power error associated with the data communication and a second power error associated with the last RS transmission.

4 . The method of claim 3 , wherein the one or more non-coherent transmission characteristics exclude one or both of the first maximum allowable difference or the second maximum allowable difference.

5 . The method of claim 1 , further comprising switching a transmission chain of a plurality of transmission chains, associated with a first carrier, from the first carrier to a second carrier based on triggering the uplink switching.

6 . The method of claim 5 , wherein:

the RS transmission is associated with the first carrier;

the data communication is transmitted on the first carrier;

the first carrier is a time division duplex carrier; and

the second carrier is a frequency division duplex carrier.

7 . The method of claim 5 , wherein:

the RS transmission is associated with a third carrier;

the data communication is transmitted on the third carrier;

the first carrier and the third carrier operate within a first band; and

the second carrier operates within a second band.

8 . The method of claim 1 , wherein the switching message comprises:

a request for a rank transmission on a first carrier or a second carrier; or

radio resource control (RRC) signaling, a medium access control (MAC) control element (CE), or downlink control information (DCI).

9 . The method of claim 1 , wherein the RS is a sounding reference signal (SRS) and the data communication is a physical uplink shared channel (PUSCH) communication.

10 . The method of claim 1 , wherein:

the data communication is transmitted on a sidelink channel;

the RS is a sidelink sounding reference signal (SRS) or a sidelink channel state information (CSI) RS; and

the data communication is a physical sidelink shared channel (PSSCH) communication.

11 . A method for wireless communication by a network node, comprising:

receiving, from a user equipment (UE), an uplink capability message indicating coherent uplink multiple-in-multiple-out (MIMO) capability, at the UE, associated with coherent transmission characteristics;

transmitting, to the UE, a switch parameter that configures the UE for uplink switching;

transmitting, to the UE, a switching message that triggers the uplink switching at a time period that is after a reference signal (RS) transmission and prior to a scheduled data communication; and

receiving, from the UE, data in accordance with the scheduled data communication according to one or more non-coherent transmission characteristics based on transmitting the switching message.

12 . The method of claim 11 , wherein:

the coherent transmission characteristics are associated with a coherent transmitted precoding matrix indicator (TPMI);

the one or more non-coherent transmission characteristics are associated with a non-coherent TPMI; and

the method further comprises refraining transmission of the coherent TPMI based on transmitting the switching message.

13 . The method of claim 11 , wherein:

the coherent transmission characteristics comprise both:

a first maximum allowable difference between a first phase of the data communication and a second phase of a last RS transmission, and

a second maximum allowable difference between a first power error associated with the data communication and a second power error associated with the last RS transmission.

14 . The method of claim 13 , wherein the one or more non-coherent transmission characteristics exclude one or both of the first maximum allowable difference or the second maximum allowable difference.

15 . The method of claim 11 , wherein the uplink switching causes the UE to switch a transmission chain of a plurality of transmission chains, associated with a first carrier, from the first carrier to a second carrier.

16 . The method of claim 15 , wherein:

the RS transmission is associated with the first carrier;

the data communication is received on the first carrier;

the first carrier is a time division duplex carrier; and

the second carrier is a frequency division duplex carrier.

17 . The method of claim 15 , wherein:

the RS transmission is associated with a third carrier;

the data communication is received on the third carrier,

the first carrier and the third carrier operate within a first band, and

the second carrier operates within a second band.

18 . The method of claim 11 , wherein the switching message comprises:

a request for a rank transmission on a first carrier or a second carrier; or

radio resource control (RRC) signaling, a medium access control (MAC) control element (CE), or downlink control information (DCI).

19 . The method of claim 11 , wherein the RS is a sounding reference signal (SRS) and the data communication is a physical uplink shared channel (PUSCH) communication.

20 . The method of claim 11 , wherein:

the data communication is transmitted on a sidelink channel;

the RS is a sidelink sounding reference signal (SRS) or a sidelink channel state information (CSI) RS; and

the data communication is a physical sidelink shared channel (PSSCH) communication.

21 . An apparatus for wireless communications at a user equipment (UE), comprising:

at least one processor;

at least one memory coupled with the at least one processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:

transmit, to a network node, an uplink capability message indicating a coherent uplink multiple-in-multiple-out (MIMO) capability associated with coherent transmission characteristics;

receive, from the network node, a switch parameter that configures the UE for uplink switching;

receive, from the network node, a switching message that triggers the uplink switching a time period that is after a reference signal (RS) transmission and prior to a scheduled data communication; and

transmit, to the network node, data in accordance with the scheduled data communication according to one or more non-coherent transmission characteristics based on the uplink switching being triggered after the RS transmission and prior to the scheduled data communication.

22 . The apparatus of claim 21 , wherein:

the coherent transmission characteristics are associated with a coherent transmitted precoding matrix indicator (TPMI); and

the one or more non-coherent transmission characteristics are associated with a non-coherent TPMI.

23 . The apparatus of claim 21 , wherein execution of the instructions cause the apparatus to switch a transmission chain of a plurality of transmission chains, associated with a first carrier, from the first carrier to a second carrier based on triggering the uplink switching.

24 . The apparatus of claim 23 , wherein:

the RS transmission is associated with the first carrier;

the data communication is transmitted on the first carrier;

the first carrier is a time division duplex carrier; and

the second carrier is a frequency division duplex carrier.

25 . The method of claim 5 , wherein:

the RS transmission is associated with a third carrier;

the data communication is transmitted on the third carrier,

the first carrier and the third carrier operate within a first band, and

the second carrier operates within a second band.

26 . An apparatus for wireless communications at a network node, comprising:

at least one processor,

at least one memory coupled with the at least one processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:

receive, from a user equipment (UE), an uplink capability message indicating a coherent uplink multiple-in-multiple-out (MIMO) capability, at the UE, associated with coherent transmission characteristics;

transmit, to the UE, a switch parameter that configures the UE for uplink switching;

transmit, to the UE, a switching message that triggers the uplink switching at a time period that is after a reference signal (RS) transmission and prior to a scheduled data communication; and

receive, from the UE, data in accordance with the scheduled data communication according to one or more non-coherent transmission characteristics based on transmitting the switching message.

27 . The apparatus of claim 26 , wherein:

the coherent transmission characteristics are associated with a coherent transmitted precoding matrix indicator (TPMI);

the one or more non-coherent transmission characteristics are associated with a non-coherent TPMI; and

execution of the instructions further cause the apparatus to refrain transmission of the coherent TPMI based on transmitting the switching message.

28 . The apparatus of claim 26 , wherein the uplink switching causes the UE to switch a transmission chain of a plurality of transmission chains, associated with a first carrier, from the first carrier to a second carrier.

29 . The apparatus of claim 28 , wherein:

the RS transmission is associated with the first carrier;

the data communication is received on the first carrier;

the first carrier is a time division duplex carrier; and

the second carrier is a frequency division duplex carrier.

30 . The apparatus of claim 28 , wherein:

the RS transmission is associated with a third carrier;

the data communication is received on the third carrier,

the first carrier and the third carrier operate within a first band, and

the second carrier operates within a second band.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (55)