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US 12,707,423 B2Granted
Fallback behavior for sounding reference signal transmissions
AssigneeNokia Technologies Oy
InventorsHyun-Su Cha, Ryan Keating, Tao Tao
Life of this patent
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Abstract
Embodiments of the present disclosure relate to fallback behavior for sounding reference signal (SRS) transmissions. According to embodiments of the present disclosure, a terminal device determines an activation/deactivation on the configured SRS resource in radio resource control (RRC)_INACTIVE state and behaviours of the terminal device depend on the activation/deactivation. In this way, it improves positioning accuracy for terminal devices in RRC-INACTIVE state. Additionally, it can also improve power consumption efficiency by avoiding unnecessary power consumption of the terminal device.
Claims20
A first device, comprising:
- a processor;
- and
- a non-transitory computer-readable medium comprising computer-executable instructions that, when executed by the processor, cause the processor to perform the following operations:
- receive, from a second device, a configuration of sounding reference signal (SRS) resource for positioning to be used in an inactive state of the first device;
- monitor at least one first reference signal associated with the configuration of SRS resource from the second device and at least one second reference signal associated with the configuration of the SRS resource from the second device, wherein the at least one first reference signal is a path-loss reference signal for a SRS resource set and the at least one second reference signal is a spatial relation reference signal for a SRS resource, wherein the path-loss reference signal is a positioning reference signal (PRS) resource, and wherein the spatial relation reference signal has a maximum received power, a smallest reference signal time difference, and a smallest time of arrival, among a plurality of spatial relation reference signals configured for the SRS resource set;
- determine that no configured spatial relation reference signal is from a TRP which transmits the path-loss reference signal;
- based on a determination that no configured spatial relation reference signal is from a TRP which transmits the path-loss reference signal, determine, among a plurality of spatial relation reference signals transmitted from a physical cell which transmits the path-loss reference signal for the SRS resource set, the spatial relation reference signal;
- determine the parameter related to the at least one first reference signal based on the at least one second reference signal by:
- determining path-loss estimations of the plurality of spatial relation reference signals;
- and
- determining a path-loss based on an average value of the path-loss estimations;
- determine a failure in detecting the at least one first reference signal and a success in detecting the at least one second reference signal;
- based on the determination of the failure in detecting the at least one first reference signal and the success in detecting the at least one second reference signal:
- trigger a timer;
- continuously monitor the at least one first reference signal and the at least one second reference signal from the second device based on a monitoring period configured for an radio resource control (RRC) inactive state of the first device;
- and
- deactivate the SRS resource based on expiry of the timer.
14 more elements
A system comprising:
- a first device;
- a processor;
- and
- a non-transitory computer-readable medium comprising computer-executable instructions that, when executed by the processor, cause the processor to perform the following operations:
- receive, from a second device, a configuration of sounding reference signal (SRS) resource for positioning to be used in an inactive state of the first device;
- monitor at least one first reference signal associated with the configuration of SRS resource from the second device and at least one second reference signal associated with the configuration of the SRS resource from the second device, wherein the at least one first reference signal is a path-loss reference signal for a SRS resource set and the at least one second reference signal is a spatial relation reference signal for a SRS resource, wherein the path-loss reference signal is a positioning reference signal (PRS) resource, and wherein the spatial relation reference signal has a maximum received power, a smallest reference signal time difference, and a smallest time of arrival, among a plurality of spatial relation reference signals configured for the SRS resource set;
- determine that no configured spatial relation reference signal is from a TRP which transmits the path-loss reference signal;
- based on a determination that no configured spatial relation reference signal is from a TRP which transmits the path-loss reference signal, determine, among a plurality of spatial relation reference signals transmitted from a physical cell which transmits the path-loss reference signal for the SRS resource set, the spatial relation reference signal;
- determine the parameter related to the at least one first reference signal based on the at least one second reference signal by:
- determining path-loss estimations of the plurality of spatial relation reference signals;
- and
- determining a path-loss based on an average value of the path-loss estimations;
- determine a failure in detecting the at least one first reference signal and a success in detecting the at least one second reference signal;
- based on the determination of the failure in detecting the at least one first reference signal and the success in detecting the at least one second reference signal:
- trigger a timer;
- continuously monitor the at least one first reference signal and the at least one second reference signal from the second device based on a monitoring period configured for an radio resource control (RRC) inactive state of the first device;
- and
- deactivate the SRS resource based on expiry of the timer.
15 more elements
A method comprising:
- receiving, from a second device, a configuration of sounding reference signal (SRS) resource for positioning to be used in an inactive state of the first device;
- monitoring at least one first reference signal associated with the configuration of SRS resource from the second device and at least one second reference signal associated with the configuration of the SRS resource from the second device, wherein the at least one first reference signal is a path-loss reference signal for a SRS resource set and the at least one second reference signal is a spatial relation reference signal for a SRS resource, wherein the path-loss reference signal is a positioning reference signal (PRS) resource, and wherein the spatial relation reference signal has a maximum received power, a smallest reference signal time difference, and a smallest time of arrival, among a plurality of spatial relation reference signals configured for the SRS resource set;
- determining that no configured spatial relation reference signal is from a TRP which transmits the path-loss reference signal;
- based on a determination that no configured spatial relation reference signal is from a TRP which transmits the path-loss reference signal, determining, among a plurality of spatial relation reference signals transmitted from a physical cell which transmits the path-loss reference signal for the SRS resource set, the spatial relation reference signal;
- determining the parameter related to the at least one first reference signal based on the at least one second reference signal by:
- determining path-loss estimations of the plurality of spatial relation reference signals;
- and
- determining a path-loss based on an average value of the path-loss estimations;
- determining a failure in detecting the at least one first reference signal and a success in detecting the at least one second reference signal;
- based on the determination of the failure in detecting the at least one first reference signal and the success in detecting the at least one second reference signal:
- triggering a timer;
- continuously monitoring the at least one first reference signal and the at least one second reference signal from the second device based on a monitoring period configured for an radio resource control (RRC) inactive state of the first device;
- and
- deactivating the SRS resource based on expiry of the timer.
11 more elements
Dependencies are inferred from the claim text.