IP Library › Granted Patent US 12,549,306
Granted Patent B2
US 12,549,306 · App. 18/665,276 · Granted Feb 10, 2026

Efficient SRS resource indication methods

Inventors: Robert Mark Harrison (Plano, TX); Sebastian Faxér (Stockholm, SE); Andreas Nilsson (Gothenburg, SE); Sven Petersson (Gothenburg, SE)
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
H04L5/0048H04B7/0456H04L5/0023H04L5/005H04L5/0092H04W72/21H04L5/1469H04W72/046
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Quick Facts
Patent No.
US 12,549,306
App. No.
18/665,276
Filed
May 15, 2024
Granted
Feb 10, 2026
Kind
B2
Art Unit
2461
USPC
370/329
Abstract

A method of transmitting an uplink transmission by a wireless device is disclosed. The method comprises a wireless device receiving signaling configuring the wireless device with a plurality of Sounding Reference Signal (SRS) resources. The wireless device subsequently receives an indication, in a physical layer downlink control channel, of a selected plurality of SRS resources selected from among the plurality of configured SRS resources and transmits a plurality of multiple-input multiple-output (MIMO) layers of a PUSCH transmission. The selected plurality of SRS resources map to respective ones of the plurality of MIMO layers and the indication of the selected plurality of SRS resources includes SRS resource indexes with a fixed order that corresponds to an order in which the SRS resources of the selected plurality of SRS resources are mapped to the MIMO layers.

Claims (52)

1 . A method in a wireless device, operable in a wireless communication network, of identifying one or more SRS resources to be used in a transmission by the wireless device, the method comprising:

receiving signaling configuring the wireless device to use a plurality of SRS resource groups, wherein each group comprises a plurality of SRS resources and wherein none of the SRS resources can be selected for simultaneous use with another SRS resource belonging to the same SRS resource group;

receiving an indication, in a physical layer downlink control channel, of the SRS resources to be used;

determining, from the indication, a first and a second SRS resource group, wherein the first and second SRS resource groups are selected from the plurality of SRS resource groups;

determining from the indication a first SRS resource that is selected only from the first SRS resource group;

determining from the indication a second SRS resource that is selected only from the second SRS resource group; and

transmitting simultaneously

SRSs identified by the first and second SRS resources.

2 . The method of claim 1 , wherein a size of a field used to signal the indication is determined based on a maximum number of MIMO layers that the wireless device is configured to transmit, a number of SRS resource groups from which an SRS resource may be selected, and a number of SRS resources in the plurality of SRS resource groups.

3 . The method of claim 1 , wherein the wireless device includes multiple antenna panels, each one of the plurality of reference signal resource groups corresponding to a different one of the antenna panels.

4 . The method of claim 1 , wherein receiving signaling configuring the wireless device to use a plurality of SRS resource groups includes receiving a radio resource control message that defines a control channel trigger associated with the plurality of SRS resource groups; and

wherein receiving an indication, in a physical layer downlink control channel, of the SRS resources to be used includes receiving a trigger associated with the plurality of SRS resource groups and a resource indicator that indicates SRS resources selected from among SRS resources within the triggered plurality of SRS resource groups.

5 . A wireless device operable in a wireless communication network to transmit an uplink transmission, the wireless device comprising:

an antenna configured to send and receive wireless signals; and

a transceiver connected to the antenna and to processing circuitry, and configured to condition signals communicated between the antenna and the processing circuitry, the processing circuitry being configured to carry out a method comprising:

receiving signaling configuring the wireless device to use a plurality of SRS resource groups, wherein each group comprises a plurality of SRS resources and wherein none of the SRS resources can be selected for simultaneous use with another SRS resource belonging to the same SRS resource group;

receiving an indication, in a physical layer downlink control channel, of the SRS resources to be used;

determining, from the indication, a first and a second SRS resource group, wherein the first and second SRS resource groups are selected from the plurality of SRS resource groups;

determining from the indication a first SRS resource that is selected only from the first SRS resource group;

determining from the indication a second SRS resource that is selected only from the second SRS resource group; and

transmitting simultaneously

SRSs identified by the first and second SRS resources.

6 . The wireless device of claim 5 , wherein a size of a field used to signal the indication is determined based on a maximum number of MIMO layers that the wireless device is configured to transmit, a number of SRS resource groups from which an SRS resource may be selected, and a number of SRS resources in the plurality of SRS resource groups.

7 . The wireless device of claim 5 , wherein the antenna includes multiple antenna panels, each one of the plurality of reference signal resource groups corresponding to a different one of the antenna panels.

8 . The wireless device of claim 5 , wherein receiving signaling configuring the wireless device to use a plurality of SRS resource groups includes receiving a radio resource control message that defines a control channel trigger associated with the plurality of SRS resource groups; and

wherein receiving an indication, in a physical layer downlink control channel, of the SRS resources to be used includes receiving a trigger associated with the plurality of SRS resource groups and a resource indicator that indicates SRS resources selected from among SRS resources within the triggered plurality of SRS resource groups.

9 . A method in a network node, of configuring reference signal transmission settings in a wireless device operable in a wireless communication network, the method comprising:

transmitting signaling configuring the wireless device to use a plurality of SRS resource groups, wherein each group comprises a plurality of SRS resources and wherein none of the SRS resources can be selected for simultaneous use with another SRS resource belonging to the same SRS resource group;

transmitting an indication, in a physical layer downlink control channel, of the SRS resources to be used, the indication including an indication of:

a first and a second SRS resource group, wherein the first and second SRS resource groups are selected from the plurality of SRS resource groups,

a first SRS resource that is selected only from the first SRS resource group, and

a second SRS resource that is selected only from the second SRS resource group and is selected for simultaneous use with the first SRS resource; and

receiving

SRSs identified by the first and second SRS resources and transmitted simultaneously by the wireless device.

10 . The method of claim 9 , wherein a size of a field used for the indication is determined based on a maximum number of MIMO layers that the wireless device is configured to transmit, a number of SRS resource groups from which an SRS resource may be selected, and a number of SRS resources in the plurality of SRS resource groups.

11 . The method of claim 9 , wherein the wireless device includes multiple antenna panels, each one of the plurality of reference signal resource groups corresponding to a different one of the antenna panels.

12 . The method of claim 9 , wherein transmitting signaling configuring the wireless device to use a plurality of SRS resource groups includes transmitting a radio resource control message that defines a control channel trigger associated with the plurality of SRS resource groups; and

wherein transmitting an indication, in a physical layer downlink control channel, of the SRS resources to be used includes transmitting a trigger associated with the plurality of SRS resource groups and a resource indicator that indicates SRS resources selected from among SRS resources within the triggered plurality of SRS resource groups.

13 . A network node for receiving an uplink transmission from a wireless device in a wireless communication network, the network node comprising:

an antenna configured to send and receive wireless signals; and

a transceiver connected to the antenna and to processing circuitry, and configured to condition signals communicated between the antenna and the processing circuitry, the processing circuitry being configured to carry out a method comprising:

transmitting signaling configuring the wireless device to use a plurality of SRS resource groups, wherein each group comprises a plurality of SRS resources and wherein none of the SRS resources can be selected for simultaneous use with another SRS resource belonging to the same SRS resource group;

transmitting an indication, in a physical layer downlink control channel, of the SRS resources to be used, the indication including an indication of:

a first and a second SRS resource group, wherein the first and second SRS resource groups are selected from the plurality of SRS resource groups,

a first SRS resource that is selected only from the first SRS resource group, and

a second SRS resource that is selected only from the second SRS resource group and is selected for simultaneous use with the first SRS resource;

receiving

SRSs identified by the first and second SRS resources and transmitted simultaneously by the wireless device.

14 . The network node of claim 13 , wherein a size of a field used for the indication is determined based on a maximum number of MIMO layers that the wireless device is configured to transmit, a number of SRS resource groups from which an SRS resource may be selected, and a number of SRS resources in the plurality of SRS resource groups.

15 . The network node of claim 13 , wherein the wireless device includes multiple antenna panels, each one of the plurality of reference signal resource groups corresponding to a different one of the antenna panels.

16 . The network node of claim 13 , wherein transmitting signaling configuring the wireless device to use a plurality of SRS resource groups includes transmitting a radio resource control message that defines a control channel trigger associated with the plurality of SRS resource groups; and

wherein transmitting an indication, in a physical layer downlink control channel, of the SRS resources to be used includes transmitting a trigger associated with the plurality of SRS resource groups and a resource indicator that indicates SRS resources selected from among SRS resources within the triggered plurality of SRS resource groups.

Continuity (7)
Continuation 17981827 · Nov 7, 2022
Continuation 17114716 · Dec 8, 2020
Continuation 16447680 · Jun 20, 2019
Continuation 16195959 · Nov 20, 2018
Continuation PCTIB2018057656 · Oct 2, 2018
Provisional Application 62567156 · Oct 2, 2017
Related Publication 20240305421A1 · Sep 12, 2024
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CATT, “Discussion on non-codebook based transmission for UL”, 3GPP TSG RAN WG1 Meeting NR#3, Nagoya, Japan, Sep. 18-21, 2017, pp. 1-4, R1-1715795, 3GPP. [cited by applicant]
CATT, “Discussion on non-codebook based UL MIMO transmission,” 3GPP TSG RAN WG1 #90, R1-1712365; Prague, Czechia, Aug. 21-25, 2017, 3 pages. [cited by applicant]
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Ericsson, “On codebook based UL MIMO transmission with precoded SRS,” 3GPP TSG-RAN WG1 #88, R1-1703225; Athens, Greece, Feb. 13-17, 2017, 5 pages. [cited by applicant]
Ericsson, “Summary of offline discussion on UL MIMO Open Issues,” 3GPP TSG-RAN WG1 NR#3, R1-1716921; Nagoya, Japan, Sep. 18-21, 2017, 2 pages. [cited by applicant]
Ericsson, “UL MIMO for non-codebook based transmission,” 3GPP TSG-RAN WG1 #90, R1-1714272; Prague, Czech Republic, Aug. 21-25, 2017, 4 pages. [cited by applicant]
Ericsson, “UL MIMO for non-codebook based transmission,” 3GPP TSG-RAN WG1 NR Ad Hoc #3, R1-1716342; Nagoya, Japan, Sep. 18-21, 2017, 5 pages. [cited by applicant]
Ericsson, “UL MIMO procedures for codebook based transmission,” 3GPP TSG-RAN WG1 #89ah-NR, R1-1711008; Qingdao, China, Jun. 27-30, 2017, 8 pages. [cited by applicant]
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Guangdong Oppo Mobile Telecom, “Discussion on the UL Beam Management”, 3GPP TSG RAN1 meeting #90, Prague, Czech Republic, Aug. 21-25, 2017, pp. 1-4, R1-1713287, 3GPP. [cited by applicant]
Guangdong Oppo Mobile Telecom, “On SRS design for NR,” 3GPP TSG RAN WG1 NR Ad-Hoc#2, Qingdao, China, Jun. 27-30, 2017, pp. 1-5, R1-1710147, 3GPP. [cited by applicant]
Guangdong Oppo Mobile Telecom, “On uplink codebook design”, 3GPP TSG RAN1 meeting #90, Prague, Czech Republic, Aug. 21-25, 2017, pp. 1-2, R1-1713241, 3GPP. [cited by applicant]
Huawei et al., “Non-codebook based transmission for UL MIMO”, 3GPP TSG RAN WG1 Meeting #90, Prague, Czech Republic, Aug. 21-25, 2017, pp. 1-8, R1-1712229, 3GPP. [cited by applicant]
Huawei et al., “UL beam management”, 3GPP TSG RAN WG1 Meeting #90, Prague, Czech Republic, Aug. 21- 25, 2017, pp. 1-4, R1-1712223, 3GPP. [cited by applicant]
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Huawei et al., “UL SRS design for beam management and CSI acquisition,” 3GPP TSG RAN WG1 NR Ad Hoc Meeting, Qingdao, China, Jun. 27-30, 2017, pp. 1-8, R1-1709936, 3GPP. [cited by applicant]
Intel Corporation, “Details for UL Beam Management”, 3GPP TSG RAN WG1 Meeting #90, Prague, P.R. Czech, Aug. 21-25, 2017, pp. 1-8, R1-1712551, 3GPP. [cited by applicant]
Intel Corporation, “On Codebook Based UL Transmission”, 3GPP TSG RAN WG1 Meeting #90, Prague, Czechia, Aug. 21-25, 2017, pp. 1-6, R1-1712537, 3GPP. [cited by applicant]
Intel et al., “Way Forward on Uplink Multi-panel and Multi-TRP operation,” 3GPP TSG RAN WG1 Meeting #89, R1-1709735; Hangzhou, P.R. China, May 15-19, 2017, 2 pages. [cited by applicant]
LG Electronics et al., “WF on SRS beam sweeping behavior”, 3GPP TSG RAN1 meeting #90, Prague, Czech Republic, Aug. 21-25, 2017, pp. 1-3, R1-1715183, 3GPP. [cited by applicant]
LG Electronics et al., “WF on SRS Tx beam determination”, 3GPP TSG RAN1 #89, Hangzhou, P.R. China, May 15-19, 2017, pp. 1-4, R1-1709376, 3GPP. [cited by applicant]
LG Electronics, “Discussion on codebook based transmission for UL”, 3GPP TSG RAN1 meeting #90, Prague, Czech Republic, Aug. 21-25, 2017, pp. 1-5, R1-1713136, 3GPP. [cited by applicant]
LG Electronics, “On SRS design and related operations”, 3GPP TSG RAN1 meeting #90, Prague, Czech Republic, Aug. 21-25, 2017, pp. 1-8, R1-1713159, 3GPP. [cited by applicant]
MCC Support, “Final Report of 3GPP TSG RAN WG1 #88 v1.0.0 (Athens, Greece, Feb. 13-17, 2017)”, 3GPP TSG RAN WG1 Meeting #88bis, Spokane, USA, Apr. 3-7, 2017, pp. 1-152, R1-1704172, 3GPP. [cited by applicant]
MCC Support, “Final Report of 3GPP TSG RAN WG1 #88bis v1.0.0 (Spokane, USA, Apr. 3-7, 2017)”, 3GPP TSG RAN WG1 Meeting #89, Hangzhou, China, May 15-19, 2017, pp. 1-154, R1-1708890, 3GPP. [cited by applicant]
MCC Support, “Final Report of 3GPP TSG RAN WG1 #90bis v1.0.0 (Prague, Czech Rep, Oct. 9-13, 2017)”, 3GPP TSG RAN WG1 Meeting #91, Reno, USA, Nov. 27-Dec. 1, 2017, pp. 1-206, R1-1719301, 3GPP. [cited by applicant]
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Samsung, “Discussion on UL beam management”, 3GPP TSG RAN WG1 Meeting #90, Prague, Czech, Aug. 21-25, 2017, pp. 1-5, R1-1713596, 3GPP. [cited by applicant]
Sony, “Considerations on UL beam management”, 3GPP TSG RAN WG1 Meeting #90, Prague, Czechia, Aug. 21-25, 2017, pp. 1-2, R1-1712966, 3GPP. [cited by applicant]
Sony, “Open issues on SRS design,” 3GPP TSG RAN WG1 NR Ad-Hoc#2, Qingdao, China, Jun. 27-30, 2017, pp. 1-28, R1-1711951, 3GPP. [cited by applicant]
Vivo, “Discussion on Codebook Based UL Transmission”, 3GPP TSG RAN WG1 Meeting #90, Prague, P.R. Czech, Aug. 21-25, 2017, pp. 1-6, R1-1712830, 3GPP. [cited by applicant]
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VIvo, “Discussion on uplink beam management”, 3GPP TSG RAN WG1 Meeting #90, Prague, P.R. Czech, Aug. 21-25, 2017, pp. 1-3, R1-1712838, 3GPP. [cited by applicant]
ZTE, “Codebook based UL transmission”, 3GPP TSG RAN WG1 Meeting #90, Prague, Czechia, Aug. 21-25, 2017, pp. 1-5, R1-1712285, 3GPP. [cited by applicant]
ZTE, “Discussion on SRS design for NR”, 3GPP TSG RAN WG1 Meeting #90, Prague, Czechia, Aug. 21-25, 2017, pp. 1-5, R1-1712309, 3GPP. [cited by applicant]
ZTE, “UL beam management for NR MIMO”, 3GPP TSG RAN WG1 Meeting #90, Prague, Czechia, Aug. 21-25, 2017, pp. 1-7, R1-1712299, 3GPP. [cited by applicant]
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Interdigital, Inc., “On Efficient UL Beam Management”, 3GPP TSG RAN WG1 Meeting #90, Prague, Czech Republic, Aug. 21-25, 2017, pp. 1-4, R1-1714143, 3GPP. [cited by applicant]
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MCC Support, “Final Report of 3GPP TSG RAN WG1 #90 v1.0.0 (Prague, Czech Rep, Aug. 21-25, 2017)”, 3GPP TSG RAN WG1 Meeting #90bis, Prague, Czech Rep, Oct. 9-13, 2017, pp. 1-172, R1-1716941, 3GPP. [cited by applicant]
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