US 11,456,835 B2Granted

Low overhead aperiodic triggering of multi-symbol SRS

AssigneeTelefonaktiebolaget LM Ericsson (publ)

InventorsSiva Muruganathan, Shiwei Gao, Sebastian Faxér

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Abstract

Systems and methods are disclosed herein for providing aperiodic Sounding Reference Signal (SRS) triggering in a wireless system. Embodiments of a method performed by a wireless device and corresponding embodiments of a wireless device are disclosed. In some embodiments, a method in a wireless device for triggering aperiodic SRS comprises receiving a first SRS configuration for a first type of aperiodic SRS transmission and a second SRS configuration for a second type of aperiodic SRS transmission. The method further comprises receiving downlink control information comprising a parameter for triggering an aperiodic SRS transmission and determining whether to use the first SRS configuration or the second SRS configuration. The method further comprises transmitting an aperiodic SRS transmission in accordance with the determined SRS configuration. Embodiments of a method performed by a base station and corresponding embodiments of a base station are also disclosed.

Claims25

Dependent claims

A method in a wireless device for triggering aperiodic Sounding Reference Signal, SRS, the method comprising:

receiving a first SRS configuration for a first set of wireless device specific SRS uplink normal subframes and/or a second SRS configuration for a second set of wireless device specific uplink normal subframes;
receiving downlink control information in a first subframe to trigger an aperiodic SRS transmission in a second subframe, the received downlink control information comprises a multi-bit parameter comprising two or more bits and provided in a same-length SRS request field of the downlink control information for triggering the aperiodic SRS transmission using the first SRS configuration or the second SRS configuration, wherein a first value of the multi-bit parameter is mapped exclusively to the first SRS configuration and a second value of the multi-bit parameter is mapped exclusively to the second SRS configuration;
determining whether to use the first SRS configuration or the second SRS configuration based on whether the second subframe is included in the first set of wireless device specific SRS uplink normal subframes or the second set of wireless device specific SRS uplink normal subframes and at least one of:
one or more higher layer parameters configured to activate the first SRS configuration or the second SRS configuration;
and
a Medium Access Control, MAC, Control Element, CE, configured to activate the first SRS configuration or the second SRS configuration;
and
mappings between the first value and the second value of the multi-bit parameter and the first SRS configuration and the second SRS configuration;
and
transmitting the aperiodic SRS transmission in accordance with the determined SRS configuration.

7 more elements

A method performed by a base station for triggering aperiodic Sounding Reference Signal, SRS, comprising:

transmitting, to a wireless device, a first SRS configuration for a first set of wireless device specific SRS uplink normal subframes and/or a second SRS configuration for a second set of wireless device specific uplink normal subframes;
transmitting, to the wireless device, downlink control information in a first subframe to trigger an aperiodic SRS transmission in a second subframe, the downlink control information comprises a multi-bit parameter having two or more bits and provided in a same-length SRS request field of the downlink control information for triggering the aperiodic SRS transmission using the first SRS configuration or the second SRS configuration, wherein a first value of the multi-bit parameter is mapped exclusively to the first SRS configuration and a second value of the multi-bit parameter is mapped exclusively to the second SRS configuration;
and
receiving, from the wireless device, the aperiodic SRS transmission in accordance with one of the first SRS configuration and the second SRS configuration as a function of whether the second subframe is included in the first set of wireless device specific SRS uplink normal subframes or the second set of wireless device specific SRS uplink normal subframes and determined based on at least one of:
one or more higher layer parameters configured to activate the first SRS configuration or the second SRS configuration;
a Medium Access Control, MAC, Control Element, CE, configured to activate the first SRS configuration or the second SRS configuration;
and
mappings between the first value and the second value of the multi-bit parameter and the first SRS configuration and the second SRS configuration.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/270,008Filed 19 Aug 2019 · us provisional application
Priority: 20 Aug 2018
Published: US 2021/0250149 A112 Aug 2021
Granted: 27 Sep 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04L 5/0048
Arrangements for allocating sub-channels of the transmission path: allocation of pilot signals, i.e. of signals known to the receiver
H04L 5/005
Allocation of pilot signals, i.e. of signals known to the receiver: of common pilots, i.e. pilots destined for multiple users or terminals
H04L 5/0037
Arrangements for allocating sub-channels of the transmission path: inter-user or inter-terminal allocation
H04L 5/0051
Allocation of pilot signals, i.e. of signals known to the receiver: of dedicated pilots, i.e. pilots destined for a single user or terminal