WO2025148261A1 - Systems and methods for improving channel state information measurement accuracy - Google Patents
Systems and methods for improving channel state information measurement accuracyInfo
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- WO2025148261A1 WO2025148261A1 PCT/CN2024/104357 CN2024104357W WO2025148261A1 WO 2025148261 A1 WO2025148261 A1 WO 2025148261A1 CN 2024104357 W CN2024104357 W CN 2024104357W WO 2025148261 A1 WO2025148261 A1 WO 2025148261A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
Definitions
- the disclosure relates generally to wireless communications, including but not limited to systems and methods for improving channel state information measurement accuracy.
- example embodiments disclosed herein are directed to solving the issues relating to one or multiple of the problems presented in the prior art, as well as providing additional features that will become readily apparent by reference to the following detailed description when taken in conjunction with the accompany drawings.
- example systems, methods, devices and computer program products are disclosed herein. It is understood, however, that these embodiments are presented by way of example and are not limiting, and it will be apparent to those of ordinary skill in the art who read the present disclosure that various modifications to the disclosed embodiments can be made while remaining within the scope of this disclosure.
- a wireless communication device e.g., UE2 can receive/obtain/acquire a first configuration of a first group of at least one reference signal (RS) that includes a sensing or positioning RS from a wireless communication node (e.g., BS2) .
- the wireless communication device can receive a second configuration of a second group of at least one RS from the wireless communication node.
- the second configuration can be different from the first configuration.
- the wireless communication device can send/transmit/provide a measurement report to the wireless communication node.
- the wireless communication device can send/transmit/provide the measurement report according to the first configuration and the second configuration to the wireless communication node.
- the first configuration can be for interference measurement (e.g., interference observed/measured at the UE2, based on RS sent from BS1 to UE1) .
- the second configuration can be for channel measurement (e.g., using CSI-RS received by UE2 from BS2 to determine CSI) .
- the measurement report may include a result of interference measurement based on the first group. In certain implementations, in a case in which the first group is not received by the wireless communication device, the measurement report may include a result of at least one of channel measurement or interference measurement, based on the second group. In certain implementations, the first group may further include another type of RS different from the sensing or positioning RS. In certain implementations, the second configuration may include a plurality of configurations for one or more types of RSes.
- a first type of RS can be used for a first set of interference measurement, and a second type of RS can be used for a second set of interference measurement.
- a first type of RS can be used for a first set of channel or interference measurement, and a second type of RS can be used for a second set of channel or interference measurement.
- an association of RSes between the first group and the second group can be specified or configured by the wireless communication node to the wireless communication device.
- an association between different types of RSes can be specified or configured by the wireless communication node.
- at least one of the following may be included: a resource or resource set of a first type of RS can be associated with a resource or resource set of a second type of RS; a resource or resource set of the first type of RS can be associated with a plurality of resources or resource sets of the second type of RS; or a resource or resource set of the first type of RS can be associated with all resources or resource sets of the second type of RS.
- a respective measurement report of the interference measurement can be different between a case for which the RS sequence parameters are configured and a case for which the RS sequence parameters are not configured via the first configuration.
- a respective behavior of the wireless communication device can be different between the case for which the RS sequence parameters are configured and the case for which the RS sequence parameters are not configured via the first configuration.
- the wireless communication device in the case for which the RS sequence parameters are configured via the first configuration, can perform interference mitigation.
- the wireless communication device in the case for which the RS sequence parameters are not configured via the first configuration, can perform rate matching or puncturing.
- the wireless communication node can receive a request or recommendation from a network node (e.g., sensing function (SF) , LMF, or BS1) regarding the first configuration.
- a network node e.g., sensing function (SF) , LMF, or BS1
- the wireless communication device may not provide sensing or positioning service (e.g., the wireless communication device may not report sensing or positioning measurement results in the measurement report) .
- a wireless communication node can send/transmit/provide a first configuration of a first group of at least one reference signal (RS) that includes a sensing or positioning RS to a wireless communication device.
- the wireless communication node can send a second configuration of a second group of at least one RS to the wireless communication device.
- the second configuration can be different from the first configuration.
- the wireless communication node can receive a measurement report from the wireless communication device.
- RS reference signal
- the system of the technical solutions disclosed herein can provide sensing RS or positioning RS configuration in wireless communication systems, particularly for improving channel measurement or interference measurement.
- the system of the technical solutions can achieve this through at least one of the following example configurations (e.g., features or solutions) :
- Example configuration 1 Recommending or requesting a plurality of sensing RS or positioning RS by a network entity to a BS.
- Example configuration 2 Configuring a plurality of sensing RS or positioning RS to UE by the BS for rate matching or interference cancellation during data reception.
- Example configuration 3 Using configured positioning or sensing RS as a QCL source for other channels or signals.
- FIG. 2 illustrates a block diagram of an example base station and a user equipment device, in accordance with some embodiments of the present disclosure
- FIG. 3 illustrates an example configuration of a communication system, in accordance with some embodiments of the present disclosure
- FIG. 4 illustrates an example configuration of a mono-static sensing mode system, in accordance with some embodiments of the present disclosure
- FIG. 5 illustrates an example configuration of a bi-static sensing mode system, in accordance with some embodiments of the present disclosure
- FIG. 6 illustrates another example configuration of a bi-static sensing mode system, in accordance with some embodiments of the present disclosure
- FIG. 7 illustrates an example configuration of interference measurement, in accordance with some embodiments of the present disclosure
- the UE transceiver 230 and the base station transceiver 210 are configured to communicate via the wireless data communication link 250, and cooperate with a suitably configured RF antenna arrangement 212/232 that can support a particular wireless communication protocol and modulation scheme.
- the UE transceiver 210 and the base station transceiver 210 are configured to support industry standards such as the Long Term Evolution (LTE) and emerging 5G standards, and the like. It is understood, however, that the present disclosure is not necessarily limited in application to a particular standard and associated protocols. Rather, the UE transceiver 230 and the base station transceiver 210 may be configured to support alternate, or additional, wireless data communication protocols, including future standards or variations thereof.
- LTE Long Term Evolution
- 5G 5G
- wireless sensing can operate similarly to radar, for example, using reflected signals to detect the presence, location, and velocity of sensing targets, as shown in FIGS. 4-5.
- a BS or UE can transmit multiple signal resources corresponding to different beams and receive reflected signals from a strong beam.
- a BS or UE can transmit multiple signal resources corresponding to different beams, and another BS or UE can receive reflected signals and perform sensing measurement (s) in the strong beam direction.
- beam sweeping may be desirable.
- beam 3 can be transmitted from BS 1 towards the potential UAV in the air.
- the configuration may desire the antenna tilt of BS 1 to be higher in elevation angle compared to that for traditional communication. Based on beam 3, the sensing accuracy can be improved because of the stronger beamforming power.
- the transmission can cause serious interference to the UE 2, which is communicating with its serving BS 2.
- UE 2 can report CSI with consideration of sensing or positioning reference signal resources.
- a UE can be configured by BS with at least two types of RS, where the first type of RS can be CSI-RS (e.g., second configuration) and the second type of RS can be positioning RS or sensing RS (e.g., first configuration) .
- the BS can configure the UE to use sensing RS for interference measurement and/or mitigation. This configuration can be beneficial in scenarios involving unmanned aerial vehicles (UAVs) , where the interference from a sensing BS to a communication UE can be significant, even if the UE is not equipped with sensing services and may not perform sensing measurements.
- UAVs unmanned aerial vehicles
- the CSI-RS with non-zero power can be used for channel measurement (e.g., using CSI-RS received by UE2 from BS2 to determine CSI)
- the positioning RS or sensing RS can be used for interference measurement (e.g., interference observed/measured at the UE2 based on RS sent from BS1 to UE1) to make the CSI report accurate.
- the SINR or CSI computation can be based on the channel estimation (S) measured from CSI-RS and the interference estimation (I) measured from sensing RS or positioning RS, as specified below:
- a measurement report can be associated with one CSI-RS configuration and one positioning or sensing RS configuration, where the CSI-RS can be for channel measurement and the positioning RS or sensing RS can be for interference measurement.
- the UE 2 as shown in FIG. 6, can be configured with the measurement report associated with one CSI-RS configuration and one positioning or sensing RS configuration.
- the positioning or sensing RS configuration may include one or more resources, resource sets, or resource settings, where multiple resources can be from the same TRP or different TRPs.
- only sensing or positioning RS configuration may be included for interference mitigation or interference measurement.
- the configured CSI-RS resources for channel measurement and the configured positioning/sensing RS resources for interference measurement can be mapped one-to-one.
- the transmission beam for channel measurement and the interference beam from the sensing or positioning beam can be mapped one-to-one.
- one pair of resources for channel and interference measurement can be configured to improve the system flexibility.
- one CSI-RS resource, resource configuration, resource set, or resource setting can be associated with multiple sensing or positioning RS resources, resource configurations, resource sets, or resource settings.
- multiple beams of sensing or positioning RS resources can be used for interference measurement.
- multiple CSI-RS resources or resource sets or resource configurations can be associated with a single positioning or sensing RS resource or resource set or resource configuration.
- one type of interference e.g., intra-cell interference of different UEs
- another type of interference e.g., interference from sensing RS or positioning RS
- M1 and M2 are integer numbers that can be equal to or larger/greater than 1.
- a second type of RS resource or resource set or resource configuration for channel measurement can be associated with M1 (afirst type of RS resource or resource set or resource configuration) and/or M2 (athird type of RS resource or resource set or resource configuration) , where M1 and M2 are integer numbers that can be equal to or larger/greater than 1.
- a third type of RS resource or resource set or resource configuration for channel measurement can be associated with M1 (afirst type of RS resource or resource set or resource configuration) and/or M2 (asecond type of RS resource or resource set or resource configuration) , where M1 and M2 are integer numbers that can be equal to or larger/greater than 1.
- a UE can be configured by BS with at least four types of RS, where the first type of RS can be CSI-RS used for channel measurement, the second type of RS can be CSI-IM used for interference measurement, the third type of RS can be NZP CSI-RS used for interference measurement, and the fourth type of RS can be positioning RS or sensing RS used for interference measurement.
- the first type of RS can be CSI-RS used for channel measurement
- the second type of RS can be CSI-IM used for interference measurement
- the third type of RS can be NZP CSI-RS used for interference measurement
- the fourth type of RS can be positioning RS or sensing RS used for interference measurement.
- a first type of RS resource for channel measurement can be associated with M1 (asecond type of RS resource) , M2 (athird type of RS resource) , and M3 (afourth type of RS resource) , where M1, M2, and M3 are integer numbers that can be equal to or larger/greater than 1.
- a measurement report can be configured with at least a plurality of groups of RS configurations, where the first group can be used for channel measurement, the second group can include NZP CSI-RS and/or CSI-IM used for interference measurement, and the third group can include sensing RS or positioning RS used for interference measurement.
- a measurement report can be configured with at least two groups of RS configurations, where the first group can be used for channel measurement and the second group can be used for interference measurement.
- a measurement report can be configured with at least two groups of RS configurations, where the second group can be used for channel measurement and the first group can be used for interference measurement.
- the group can include positioning or sensing RS.
- the first or second group can include more than one type of RS for channel or interference measurement.
- a single port positioning RS can be sufficient.
- a UE can receive positioning reference signals from multiple TRPs.
- each resource can correspond to each beam, e.g., PRS beams can be from gNB0 and gNB1, respectively, and can report the measurement results to location management function (LMF) .
- LMF location management function
- the base stations can receive positioning reference signals from UE and can report the measurement results to LMF via LPP signaling.
- the measurement results may include at least one of the following elements: RSRP/RSRPP; timing of arrival, e.g., TOA, TDOA, or Rx-Tx timing difference; AOA; resource ID (or beam ID) ; and/or TRP ID.
- RSRP/RSRPP timing of arrival
- AOA resource ID
- beam ID or beam ID
- TRP ID time difference
- beam sweeping may be desirable, e.g., the transmitter side can transmit multiple beams to get high beamforming gain.
- a staggered RS pattern for positioning can be adopted in NR, as shown in FIG. 10.
- a new RS can be introduced, which can be expected to have a similar pattern or design as positioning.
- the RS pattern can be different from CSI-RS.
- a single port can be sufficient.
- positioning RS or sensing RS can be configured for channel measurement and/or interference measurement.
- a first type of RS configuration e.g., positioning RS or sensing RS, can be configured for channel measurement and/or interference measurement.
- a first group of RS configuration e.g., positioning RS and/or sensing RS
- a second group of RS configuration can be configured for interference RS, where the second group of RS is not positioning RS or sensing RS.
- the second group of RS can be CSI-RS and/or CSI-IM.
- the UE can perform rate matching around the RS resources configured by BS2.
- the UE can perform interference mitigation depending on whether the RS sequence parameters are configured or not.
- the RS requested from SF to BS and the RS configured from BS to UE can be independent, e.g., can be the same or different.
- the positioning RS or sensing RS may include the RS transmitted from BS or from UE.
- the first group can be used for channel measurement.
- the first group can be used for channel and/or interference measurement.
- the first group may include a plurality of measurement signal configurations that belong to different types of signals, including at least one of the following: reference signal for CSI, e.g., CSI-RS; positioning signal, e.g., positioning RS; and/or sensing signal, e.g., sensing RS.
- a first type of signal in the group can be used for a first set of channel measurement functions, and a second type of signal in the group can be used for a second set of channel measurement functions.
- the second group can be used for interference measurement.
- the UE can report the interference measurement results to BS.
- the measurement results may include RSSI or RSRP.
- the second group may include sensing signal configuration or positioning signal configuration.
- the second group may include a plurality of measurement signal configurations that belong to different types of signals, including at least one of the following: reference signal for CSI, e.g., CSI-RS; positioning signal, e.g., positioning RS; and/or sensing signal, e.g., sensing RS.
- a first type of signal in the group can be used for a first set of interference measurement functions, and a second type of signal in the group can be used for a second set of interference measurement functions.
- a first type of signal in the group can be a DL signal
- a second type of signal in the group can be an UL signal.
- the UE2 can receive a first configuration for the first group of at least one DL RS to be received by the UE2, including a sensing RS, and the UE can receive a second configuration for the second group of at least one RS, different from the first configuration. This may be useful to perform interference measurements caused by DL signals and/or UL signals from neighboring cells.
- the first group can be used for interference measurement
- the second group can be used for channel measurement.
- the association of the signals between the first group and the second group can be specified or configured by BS to UE.
- one signal resource in the first group can be associated with one signal resource in the second group;
- one signal resource in the first group can be associated with signal resources in the second group;
- one signal resource in the first group can be associated with signal resources of the same type in the second group; and/or one signal resource in the first group can be associated with M> 1 signal resource in the second group.
- only the first or second group of RS can be configured to UE by BS, even if the UE has no sensing or positioning service, where the group of RS includes positioning or sensing RS.
- the RS configuration can be used for data reception, for example, to perform rate matching or interference cancellation. In such cases, there may be no need/desire to associate the RS configuration with a measurement report.
- the method 1300 may include a wireless communication device receiving a first configuration of a first group of at least one reference signal (RS) that includes a sensing or positioning RS from a wireless communication node (STEP 1302) .
- the method may include the wireless communication device receiving a second configuration of a second group of at least one RS, with the second configuration differing from the first configuration, from the wireless communication node (STEP 1304) .
- the method may include the wireless communication device sending a measurement report to the wireless communication node (STEP 1306) .
- the first configuration can be for interference measurement (e.g., interference observed/measured at the UE2, based on RS sent from BS1 to UE1) .
- the second configuration can be for channel measurement (e.g., using CSI-RS received by UE2 from BS2 to determine CSI) .
- the measurement report in a case in which the second group is not received by the wireless communication device, the measurement report may include a result of interference measurement based on the first group. In certain configurations, in a case in which the first group is not received by the wireless communication device, the measurement report may include a result of at least one of channel measurement or interference measurement, based on the second group. In certain configurations, the first group may further include another type of RS different from the sensing or positioning RS. In certain configurations, the second configuration may include a plurality of configurations for one or more types of RSes.
- the one or more types of RSes may include at least one of the following: a channel state information (CSI) RS; a CSI-RS with non-zero power (NZP) ; a RS for sensing; a RS for positioning; a RS for synchronization; or another type of RS.
- the another type of RS of the first group may include at least one of the following: a channel state information (CSI) RS; a CSI-RS with non-zero power (NZP) ; a CSI interference measurement (CSI-IM) RS; an RS transmitted from another wireless communication device; or another type of RS.
- a first type of RS can be used for a first set of interference measurement
- a second type of RS can be used for a second set of interference measurement
- a first type of RS can be used for a first set of channel or interference measurement
- a second type of RS can be used for a second set of channel or interference measurement.
- an association of RSes between the first group and the second group can be specified or configured by the wireless communication node to the wireless communication device.
- a resource or resource set of a RS in the first group can be associated with a resource or resource set of a RS in the second group; a resource or resource set of a RS in the first group can be associated with all resources or resource sets of a RS in the second group; a resource of a RS in the first group can be associated with all or a plurality of resources in the second group, in which the resource in the first group and the all or a plurality of resources in the second group are of a same type of RS; or a resource of a RS in the first group can be associated with a plurality of signal resources in the second group.
- an association between different types of RSes can be specified or configured by the wireless communication node.
- at least one of the following may be included: a resource or resource set of a first type of RS can be associated with a resource or resource set of a second type of RS; a resource or resource set of the first type of RS can be associated with a plurality of resources or resource sets of the second type of RS; or a resource or resource set of the first type of RS can be associated with all resources or resource sets of the second type of RS.
- a respective measurement report of the interference measurement can be different between a case for which the RS sequence parameters are configured and a case for which the RS sequence parameters are not configured via the first configuration.
- a respective behavior of the wireless communication device can be different between the case for which the RS sequence parameters are configured and the case for which the RS sequence parameters are not configured via the first configuration.
- the wireless communication device in the case for which the RS sequence parameters are configured via the first configuration, can perform interference mitigation.
- the wireless communication device in the case for which the RS sequence parameters are not configured via the first configuration, can perform rate matching or puncturing.
- the wireless communication node can receive a request or recommendation from a network node (e.g., sensing function (SF) , LMF, or BS1) regarding the first configuration.
- a network node e.g., sensing function (SF) , LMF, or BS1
- the wireless communication device may not provide sensing or positioning service (e.g., the wireless communication device may not report sensing or positioning measurement results in the measurement report) .
- a wireless communication node can send/transmit/provide a first configuration of a first group of at least one reference signal (RS) that includes a sensing or positioning RS to a wireless communication device (STEP 1308) .
- the wireless communication node can send a second configuration of a second group of at least one RS to the wireless communication device (STEP 1310) .
- the second configuration can be different from the first configuration.
- the wireless communication node can receive a measurement report from the wireless communication device (STEP 1312) .
- any reference to an element herein using a designation such as “first, ” “second, ” and so forth does not generally limit the quantity or order of those elements. Rather, these designations can be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements can be employed, or that the first element must precede the second element in some manner.
- any of the various illustrative logical blocks, modules, processors, means, circuits, methods and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., a digital implementation, an analog implementation, or a combination of the two) , firmware, various forms of program or design code incorporating instructions (which can be referred to herein, for convenience, as “software” or a “software module) , or any combination of these techniques.
- firmware e.g., a digital implementation, an analog implementation, or a combination of the two
- firmware various forms of program or design code incorporating instructions
- software or a “software module”
- IC integrated circuit
- DSP digital signal processor
- ASIC application specific integrated circuit
- FPGA field programmable gate array
- the logical blocks, modules, and circuits can further include antennas and/or transceivers to communicate with various components within the network or within the device.
- a general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine.
- a processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or multiple microprocessors in conjunction with a DSP core, or any other suitable configuration to perform the functions described herein.
- Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program or code from one place to another.
- a storage media can be any available media that can be accessed by a computer.
- such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.
- module refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, for purpose of discussion, the various modules are described as discrete modules; however, as would be apparent to one of ordinary skill in the art, two or more modules may be combined to form a single module that performs the associated functions according to embodiments of the present solution.
- memory or other storage may be employed in embodiments of the present solution.
- memory or other storage may be employed in embodiments of the present solution.
- any suitable distribution of functionality between different functional units, processing logic elements or domains may be used without detracting from the present solution.
- functionality illustrated to be performed by separate processing logic elements, or controllers may be performed by the same processing logic element, or controller.
- references to specific functional units are only references to a suitable means for providing the described functionality, rather than indicative of a strict logical or physical structure or organization.
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Abstract
Presented are systems and methods for improving channel state information measurement accuracy. A wireless communication device can receive a first configuration of a first group of at least one reference signal (RS) that includes a sensing or positioning RS from a wireless communication node. The wireless communication device can receive a second configuration of a second group of at least one RS, with the second configuration differing from the first configuration, from the wireless communication node. The wireless communication device can send a measurement report to the wireless communication node.
Description
The disclosure relates generally to wireless communications, including but not limited to systems and methods for improving channel state information measurement accuracy.
Coverage is a key consideration in cellular network deployments. With the rise of interconnected devices, there is a growing focus on effective device communication. The current 3GPP standards, spanning from 3G to 5G and beyond, focus on the importance of seamless communication among various devices, from smart home devices to wearable devices. In industrial settings, the complexity of tasks often requires collaboration. This calls for several cooperative operational management systems, with the aim of creating workgroups and managing different types of devices to complete the required tasks.
The example embodiments disclosed herein are directed to solving the issues relating to one or multiple of the problems presented in the prior art, as well as providing additional features that will become readily apparent by reference to the following detailed description when taken in conjunction with the accompany drawings. In accordance with various embodiments, example systems, methods, devices and computer program products are disclosed herein. It is understood, however, that these embodiments are presented by way of example and are not limiting, and it will be apparent to those of ordinary skill in the art who read the present disclosure that various modifications to the disclosed embodiments can be made while remaining within the scope of this disclosure.
At least one aspect is directed to a system, method, apparatus, or computer-readable medium. A wireless communication device (e.g., UE2) can receive/obtain/acquire a first configuration of a first group of at least one reference signal (RS) that includes a sensing or positioning RS from a wireless communication node (e.g., BS2) . The wireless communication
device can receive a second configuration of a second group of at least one RS from the wireless communication node. The second configuration can be different from the first configuration. The wireless communication device can send/transmit/provide a measurement report to the wireless communication node. In certain implementations, the wireless communication device can send/transmit/provide the measurement report according to the first configuration and the second configuration to the wireless communication node. In certain implementations, the first configuration can be for interference measurement (e.g., interference observed/measured at the UE2, based on RS sent from BS1 to UE1) . In certain implementations, the second configuration can be for channel measurement (e.g., using CSI-RS received by UE2 from BS2 to determine CSI) .
In certain implementations, in a case in which the second group is not received by the wireless communication device, the measurement report may include a result of interference measurement based on the first group. In certain implementations, in a case in which the first group is not received by the wireless communication device, the measurement report may include a result of at least one of channel measurement or interference measurement, based on the second group. In certain implementations, the first group may further include another type of RS different from the sensing or positioning RS. In certain implementations, the second configuration may include a plurality of configurations for one or more types of RSes. The one or more types of RSes may include at least one of the following: a channel state information (CSI) RS; a CSI-RS with non-zero power (NZP) ; a RS for sensing; a RS for positioning; a RS for synchronization; or another type of RS. In certain implementations, the another type of RS of the first group may include at least one of the following: a channel state information (CSI) RS; a CSI-RS with non-zero power (NZP) ; a CSI interference measurement (CSI-IM) RS; an RS transmitted from another wireless communication device; or another type of RS.
In certain implementations, within the first group, a first type of RS can be used for a first set of interference measurement, and a second type of RS can be used for a second set of interference measurement. In some implementations, within the second group, a first type of RS can be used for a first set of channel or interference measurement, and a second type of RS can be used for a second set of channel or interference measurement. In certain implementations, an association of RSes between the first group and the second group can be specified or configured
by the wireless communication node to the wireless communication device. In certain implementations, a resource or resource set of a RS in the first group can be associated with a resource or resource set of a RS in the second group; a resource or resource set of a RS in the first group can be associated with all resources or resource sets of a RS in the second group; a resource of a RS in the first group can be associated with all or a plurality of resources in the second group, in which the resource in the first group and the all or a plurality of resources in the second group are of a same type of RS; or a resource of a RS in the first group can be associated with a plurality of signal resources in the second group.
In certain implementations, within the first group or the second group, an association between different types of RSes can be specified or configured by the wireless communication node. In certain implementations, within the first group or the second group, at least one of the following may be included: a resource or resource set of a first type of RS can be associated with a resource or resource set of a second type of RS; a resource or resource set of the first type of RS can be associated with a plurality of resources or resource sets of the second type of RS; or a resource or resource set of the first type of RS can be associated with all resources or resource sets of the second type of RS.
In certain implementations, a respective measurement report of the interference measurement can be different between a case for which the RS sequence parameters are configured and a case for which the RS sequence parameters are not configured via the first configuration. In some implementations, a respective behavior of the wireless communication device can be different between the case for which the RS sequence parameters are configured and the case for which the RS sequence parameters are not configured via the first configuration. In certain implementations, in the case for which the RS sequence parameters are configured via the first configuration, the wireless communication device can perform interference mitigation. In some implementations, in the case for which the RS sequence parameters are not configured via the first configuration, the wireless communication device can perform rate matching or puncturing.
In certain implementations, the wireless communication node can receive a request or recommendation from a network node (e.g., sensing function (SF) , LMF, or BS1) regarding the
first configuration. In certain implementations, the wireless communication device may not provide sensing or positioning service (e.g., the wireless communication device may not report sensing or positioning measurement results in the measurement report) .
In certain implementations, a wireless communication node can send/transmit/provide a first configuration of a first group of at least one reference signal (RS) that includes a sensing or positioning RS to a wireless communication device. The wireless communication node can send a second configuration of a second group of at least one RS to the wireless communication device. The second configuration can be different from the first configuration. The wireless communication node can receive a measurement report from the wireless communication device.
The system of the technical solutions disclosed herein can provide sensing RS or positioning RS configuration in wireless communication systems, particularly for improving channel measurement or interference measurement. The system of the technical solutions can achieve this through at least one of the following example configurations (e.g., features or solutions) :
· Example configuration 1: Recommending or requesting a plurality of sensing RS or positioning RS by a network entity to a BS.
· Example configuration 2: Configuring a plurality of sensing RS or positioning RS to UE by the BS for rate matching or interference cancellation during data reception.
· Example configuration 3: Using configured positioning or sensing RS as a QCL source for other channels or signals.
Various example embodiments of the present solution are described in detail below with reference to the following figures or drawings. The drawings are provided for purposes of illustration only and merely depict example embodiments of the present solution to facilitate the reader’s understanding of the present solution. Therefore, the drawings should not be considered limiting of the breadth, scope, or applicability of the present solution. It should be noted that for clarity and ease of illustration, these drawings are not necessarily drawn to scale.
FIG. 1 illustrates an example cellular communication network in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure;
FIG. 2 illustrates a block diagram of an example base station and a user equipment device, in accordance with some embodiments of the present disclosure;
FIG. 3 illustrates an example configuration of a communication system, in accordance with some embodiments of the present disclosure;
FIG. 4 illustrates an example configuration of a mono-static sensing mode system, in accordance with some embodiments of the present disclosure;
FIG. 5 illustrates an example configuration of a bi-static sensing mode system, in accordance with some embodiments of the present disclosure;
FIG. 6 illustrates another example configuration of a bi-static sensing mode system, in accordance with some embodiments of the present disclosure;
FIG. 7 illustrates an example configuration of interference measurement, in accordance with some embodiments of the present disclosure;
FIG. 8 illustrates another example configuration of interference measurement, in accordance with some embodiments of the present disclosure;
FIG. 9 illustrates an example configuration of using an RS for positioning, in accordance with some embodiments of the present disclosure;
FIG. 10 illustrates an example configuration of an RS pattern for positioning, in accordance with some embodiments of the present disclosure;
FIG. 11 illustrates an example configuration of channel measurement, in accordance with some embodiments of the present disclosure;
FIG. 12 illustrates another example configuration of interference measurement, in accordance with some embodiments of the present disclosure; and
FIG. 13 illustrates a flow diagram of an example method for improving channel state information measurement accuracy, in accordance with an embodiment of the present disclosure.
1. Mobile Communication Technology and Environment
FIG. 1 illustrates an example wireless communication network, and/or system, 100 in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure. In the following discussion, the wireless communication network 100 may be any wireless network, such as a cellular network or a narrowband Internet of things (NB-IoT) network, and is herein referred to as “network 100. ” Such an example network 100 includes a base station 102 (hereinafter “BS 102” ; also referred to as wireless communication node) and a user equipment device 104 (hereinafter “UE 104” ; also referred to as wireless communication device) that can communicate with each other via a communication link 110 (e.g., a wireless communication channel) , and a cluster of cells 126, 130, 132, 134, 136, 138 and 140 overlaying a geographical area 101. In Figure 1, the BS 102 and UE 104 are contained within a respective geographic boundary of cell 126. Each of the other cells 130, 132, 134, 136, 138 and 140 may include at least one base station operating at its allocated bandwidth to provide adequate radio coverage to its intended users.
For example, the BS 102 may operate at an allocated channel transmission bandwidth to provide adequate coverage to the UE 104. The BS 102 and the UE 104 may communicate via a downlink radio frame 118, and an uplink radio frame 124 respectively. Each radio frame 118/124 may be further divided into sub-frames 120/127 which may include data symbols 122/128. In the present disclosure, the BS 102 and UE 104 are described herein as non-limiting examples of “communication nodes, ” generally, which can practice the methods disclosed herein. Such communication nodes may be capable of wireless and/or wired communications, in accordance with various embodiments of the present solution.
FIG. 2 illustrates a block diagram of an example wireless communication system 200 for transmitting and receiving wireless communication signals (e.g., OFDM/OFDMA signals) in accordance with some embodiments of the present solution. The system 200 may include
components and elements configured to support known or conventional operating features that need not be described in detail herein. In one illustrative embodiment, system 200 can be used to communicate (e.g., transmit and receive) data symbols in a wireless communication environment such as the wireless communication environment 100 of Figure 1, as described above.
System 200 generally includes a base station 202 (hereinafter “BS 202” ) and a user equipment device 204 (hereinafter “UE 204” ) . The BS 202 includes a BS (base station) transceiver module 210, a BS antenna 212, a BS processor module 214, a BS memory module 216, and a network communication module 218, each module being coupled and interconnected with one another as necessary via a data communication bus 220. The UE 204 includes a UE (user equipment) transceiver module 230, a UE antenna 232, a UE memory module 234, and a UE processor module 236, each module being coupled and interconnected with one another as necessary via a data communication bus 240. The BS 202 communicates with the UE 204 via a communication channel 250, which can be any wireless channel or other medium suitable for transmission of data as described herein.
As would be understood by persons of ordinary skill in the art, system 200 may further include any number of modules other than the modules shown in Figure 2. Those skilled in the art will understand that the various illustrative blocks, modules, circuits, and processing logic described in connection with the embodiments disclosed herein may be implemented in hardware, computer-readable software, firmware, or any practical combination thereof. To clearly illustrate this interchangeability and compatibility of hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps are described generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software can depend upon the particular application and design constraints imposed on the overall system. Those familiar with the concepts described herein may implement such functionality in a suitable manner for each particular application, but such implementation decisions should not be interpreted as limiting the scope of the present disclosure.
In accordance with some embodiments, the UE transceiver 230 may be referred to herein as an “uplink” transceiver 230 that includes a radio frequency (RF) transmitter and a RF receiver each comprising circuitry that is coupled to the antenna 232. A duplex switch (not
shown) may alternatively couple the uplink transmitter or receiver to the uplink antenna in time duplex fashion. Similarly, in accordance with some embodiments, the BS transceiver 210 may be referred to herein as a “downlink” transceiver 210 that includes a RF transmitter and a RF receiver each comprising circuity that is coupled to the antenna 212. A downlink duplex switch may alternatively couple the downlink transmitter or receiver to the downlink antenna 212 in time duplex fashion. The operations of the two transceiver modules 210 and 230 may be coordinated in time such that the uplink receiver circuitry is coupled to the uplink antenna 232 for reception of transmissions over the wireless transmission link 250 at the same time that the downlink transmitter is coupled to the downlink antenna 212. Conversely, the operations of the two transceivers 210 and 230 may be coordinated in time such that the downlink receiver is coupled to the downlink antenna 212 for reception of transmissions over the wireless transmission link 250 at the same time that the uplink transmitter is coupled to the uplink antenna 232. In some embodiments, there is close time synchronization with a minimal guard time between changes in duplex direction.
The UE transceiver 230 and the base station transceiver 210 are configured to communicate via the wireless data communication link 250, and cooperate with a suitably configured RF antenna arrangement 212/232 that can support a particular wireless communication protocol and modulation scheme. In some illustrative embodiments, the UE transceiver 210 and the base station transceiver 210 are configured to support industry standards such as the Long Term Evolution (LTE) and emerging 5G standards, and the like. It is understood, however, that the present disclosure is not necessarily limited in application to a particular standard and associated protocols. Rather, the UE transceiver 230 and the base station transceiver 210 may be configured to support alternate, or additional, wireless data communication protocols, including future standards or variations thereof.
In accordance with various embodiments, the BS 202 may be an evolved node B (eNB) , a serving eNB, a target eNB, a femto station, or a pico station, for example. In some embodiments, the UE 204 may be embodied in various types of user devices such as a mobile phone, a smart phone, a personal digital assistant (PDA) , tablet, laptop computer, wearable computing device, etc. The processor modules 214 and 236 may be implemented, or realized, with a general purpose processor, a content addressable memory, a digital signal processor, an
application specific integrated circuit, a field programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. In this manner, a processor may be realized as a microprocessor, a controller, a microcontroller, a state machine, or the like. A processor may also be implemented as a combination of computing devices, e.g., a combination of a digital signal processor and a microprocessor, a plurality of microprocessors, one or multiple microprocessors in conjunction with a digital signal processor core, or any other such configuration.
Furthermore, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in firmware, in a software module executed by processor modules 214 and 236, respectively, or in any practical combination thereof. The memory modules 216 and 234 may be realized as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. In this regard, memory modules 216 and 234 may be coupled to the processor modules 210 and 230, respectively, such that the processors modules 210 and 230 can read information from, and write information to, memory modules 216 and 234, respectively. The memory modules 216 and 234 may also be integrated into their respective processor modules 210 and 230. In some embodiments, the memory modules 216 and 234 may each include a cache memory for storing temporary variables or other intermediate information during execution of instructions to be executed by processor modules 210 and 230, respectively. Memory modules 216 and 234 may also each include non-volatile memory for storing instructions to be executed by the processor modules 210 and 230, respectively.
The network communication module 218 generally represents the hardware, software, firmware, processing logic, and/or other components of the base station 202 that enable bi-directional communication between base station transceiver 210 and other network components and communication nodes configured to communicate with the base station 202. For example, network communication module 218 may be configured to support internet or WiMAX traffic. In a typical deployment, without limitation, network communication module 218 provides an 802.3 Ethernet interface such that base station transceiver 210 can communicate with a conventional
Ethernet based computer network. In this manner, the network communication module 218 may include a physical interface for connection to the computer network (e.g., Mobile Switching Center (MSC) ) . The terms “configured for, ” “configured to” and conjugations thereof, as used herein with respect to a specified operation or function, refer to a device, component, circuit, structure, machine, signal, etc., that is physically constructed, programmed, formatted and/or arranged to perform the specified operation or function.
The Open Systems Interconnection (OSI) Model (referred to herein as, “open system interconnection model” ) is a conceptual and logical layout that defines network communication used by systems (e.g., wireless communication device, wireless communication node) open to interconnection and communication with other systems. The model is broken into seven subcomponents, or layers, each of which represents a conceptual collection of services provided to the layers above and below it. The OSI Model also defines a logical network and effectively describes computer packet transfer by using different layer protocols. The OSI Model may also be referred to as the seven-layer OSI Model or the seven-layer model. In some embodiments, a first layer may be a physical layer. In some embodiments, a second layer may be a Medium Access Control (MAC) layer. In some embodiments, a third layer may be a Radio Link Control (RLC) layer. In some embodiments, a fourth layer may be a Packet Data Convergence Protocol (PDCP) layer. In some embodiments, a fifth layer may be a Radio Resource Control (RRC) layer. In some embodiments, a sixth layer may be a Non-Access Stratum (NAS) layer or an Internet Protocol (IP) layer, and the seventh layer being the other layer.
Various example embodiments of the present solution are described below with reference to the accompanying figures to enable a person of ordinary skill in the art to make and use the present solution. As would be apparent to those of ordinary skill in the art, after reading the present disclosure, various changes or modifications to the examples described herein can be made without departing from the scope of the present solution. Thus, the present solution is not limited to the example embodiments and applications described and illustrated herein. Additionally, the specific order or hierarchy of steps in the methods disclosed herein are merely example approaches. Based upon design preferences, the specific order or hierarchy of steps of the disclosed methods or processes can be re-arranged while remaining within the scope of the present solution. Thus, those of ordinary skill in the art will understand that the methods and
techniques disclosed herein present various steps or acts in a sample order, and the present solution is not limited to the specific order or hierarchy presented unless expressly stated otherwise.
2. Systems and Methods for Improving Channel State Information Measurement Accuracy
In cellular network communication systems (e.g., 5G technology) , the transmission antennas from each BS can tilt down towards the center of the corresponding coverage area to avoid serious interference from one BS to another BS during communication between the serving BS and the corresponding UE. For instance, as shown in FIG. 3, the down-tilt of the BS1 can be directed to the cell center UE 1. In this example, the interference caused by the transmission link between BS 1 and UE 1, e.g., beam 1, may not significantly impact/affect the transmission link between BS 2 and UE 2. In certain implementations, there may still be interference from BS1 transmission to UE 2, especially when UE 2 is at the cell edge. In this regard, to allow BS 2 to know/acquire/determine the channel state information (CSI) of the UE 2, BS 2 can configure UE 2 with CSI-RS resources for CSI measurement in the physical layer to allow BS 2 to know/acquire/determine the CSI between BS 2 and the UE. In certain implementations, BS 2 can perform a suitable adjustment for scheduling to avoid serious interference. In certain implementations, the UE 2 can detect interference caused by the neighbor cell based on the configuration of the CSI-IM or NZP CSI-RS and can provide feedback to BS 2 on the corresponding CSI, which may include RI, PMI, CQI, and/or L1-SINR, etc. In certain implementations, if the interference is serious, the BS 2 can choose/opt not to schedule the UE 2 on that occasion or in that beam direction.
5G technology has significantly influenced industry practices, with an industry consensus to continuously implement the rich content of 5G technology and achieve sustainable development. With 6G technology arriving soon, integrated sensing and communication (ISAC) has drawn extensive attention for 5G-Advanced technology and/or 6G technology. In this regard, a unified design of communication and sensing functions through signal joint design and/or hardware sharing can reduce costs, power consumption, and optimize resource utilization compared to two independent systems. For example, in 5G communication systems, wireless signals can be transmitted to target areas or objects. In certain implementations, the
communication systems can analyze the received reflected wireless signals to obtain/determine corresponding sensing measurement data and/or provide sensing services to third-party applications. In certain implementations, wireless sensing can operate similarly to radar, for example, using reflected signals to detect the presence, location, and velocity of sensing targets, as shown in FIGS. 4-5. In mono-static sensing mode, a BS or UE can transmit multiple signal resources corresponding to different beams and receive reflected signals from a strong beam. In bi-static sensing mode, a BS or UE can transmit multiple signal resources corresponding to different beams, and another BS or UE can receive reflected signals and perform sensing measurement (s) in the strong beam direction. In certain implementations, especially for the high frequency band, beam sweeping may be desirable.
In certain implementations/embodiments, for the use case of UAV intrusion detection, as shown in FIG. 6, beam 3 can be transmitted from BS 1 towards the potential UAV in the air. In certain implementations, the configuration may desire the antenna tilt of BS 1 to be higher in elevation angle compared to that for traditional communication. Based on beam 3, the sensing accuracy can be improved because of the stronger beamforming power. In certain implementations, the transmission can cause serious interference to the UE 2, which is communicating with its serving BS 2. In certain implementations, to obtain accurate sensing result (s) for BS1 and mitigate the caused interference for UE 2, UE 2 can report CSI with consideration of sensing or positioning reference signal resources. For example, for a measurement report in the physical layer, a UE can be configured by BS with at least two types of RS, where the first type of RS can be CSI-RS (e.g., second configuration) and the second type of RS can be positioning RS or sensing RS (e.g., first configuration) . In certain implementations, the BS can configure the UE to use sensing RS for interference measurement and/or mitigation. This configuration can be beneficial in scenarios involving unmanned aerial vehicles (UAVs) , where the interference from a sensing BS to a communication UE can be significant, even if the UE is not equipped with sensing services and may not perform sensing measurements. The CSI-RS with non-zero power can be used for channel measurement (e.g., using CSI-RS received by UE2 from BS2 to determine CSI) , and the positioning RS or sensing RS can be used for interference measurement (e.g., interference observed/measured at the UE2 based on RS sent from BS1 to UE1) to make the CSI report accurate. In certain implementations, the SINR or CSI
computation can be based on the channel estimation (S) measured from CSI-RS and the interference estimation (I) measured from sensing RS or positioning RS, as specified below:
In certain implementations, a measurement report can be associated with one CSI-RS configuration and one positioning or sensing RS configuration, where the CSI-RS can be for channel measurement and the positioning RS or sensing RS can be for interference measurement. Based on this configuration, the UE 2, as shown in FIG. 6, can be configured with the measurement report associated with one CSI-RS configuration and one positioning or sensing RS configuration. In certain implementations, the positioning or sensing RS configuration may include one or more resources, resource sets, or resource settings, where multiple resources can be from the same TRP or different TRPs. In certain implementations, in a measurement report, only sensing or positioning RS configuration may be included for interference mitigation or interference measurement.
In certain implementations, the configured CSI-RS resources for channel measurement and the configured positioning/sensing RS resources for interference measurement can be mapped one-to-one. In certain implementations, the transmission beam for channel measurement and the interference beam from the sensing or positioning beam can be mapped one-to-one. In such cases, one pair of resources for channel and interference measurement can be configured to improve the system flexibility. In certain implementations, one CSI-RS resource, resource configuration, resource set, or resource setting can be associated with multiple sensing or positioning RS resources, resource configurations, resource sets, or resource settings. In certain implementations, for one transmission beam used for channel measurement, multiple beams of sensing or positioning RS resources can be used for interference measurement. In certain implementations, multiple CSI-RS resources or resource sets or resource configurations can be associated with a single positioning or sensing RS resource or resource set or resource configuration.
In certain implementations/embodiments, as shown in FIG. 7, to allow UE to detect various kinds of interference for a measurement report in the physical layer, a UE can be
configured by BS with at least three types of RS, where the first type of RS can be CSI-RS used for channel measurement, the second type of RS can be CSI-RS or CSI-IM used for interference measurement, and the third type of RS can be positioning RS or sensing RS used for interference measurement. In certain implementations, one type of interference, e.g., intra-cell interference of different UEs, can be measured based on the second type of RS configuration, and another type of interference, e.g., interference from sensing RS or positioning RS, can be measured based on the third type of RS configuration. In certain implementations, a first type of RS resource or resource set or resource configuration for channel measurement can be associated with M1 (asecond type of RS resource or resource set or resource configuration) and/or M2 (athird type of RS resource or resource set or resource configuration) , where M1 and M2 are integer numbers that can be equal to or larger/greater than 1. In certain implementations, M1 and M2 can be the same, and in an extreme case, M1=M2=1. In certain implementations, a second type of RS resource or resource set or resource configuration for channel measurement can be associated with M1 (afirst type of RS resource or resource set or resource configuration) and/or M2 (athird type of RS resource or resource set or resource configuration) , where M1 and M2 are integer numbers that can be equal to or larger/greater than 1. In certain implementations, a third type of RS resource or resource set or resource configuration for channel measurement can be associated with M1 (afirst type of RS resource or resource set or resource configuration) and/or M2 (asecond type of RS resource or resource set or resource configuration) , where M1 and M2 are integer numbers that can be equal to or larger/greater than 1.
In certain implementations/embodiments, as shown in FIG. 8, for more flexibility in a measurement report in the physical layer, a UE can be configured by BS with at least four types of RS, where the first type of RS can be CSI-RS used for channel measurement, the second type of RS can be CSI-IM used for interference measurement, the third type of RS can be NZP CSI-RS used for interference measurement, and the fourth type of RS can be positioning RS or sensing RS used for interference measurement. In certain implementations, a first type of RS resource for channel measurement can be associated with M1 (asecond type of RS resource) , M2 (athird type of RS resource) , and M3 (afourth type of RS resource) , where M1, M2, and M3 are integer numbers that can be equal to or larger/greater than 1. In certain implementations, M1, M2, and M3 can be the same, and in an extreme case, M1=M2=M3=1. In certain implementations, for CSI measurement, a measurement report can be configured with at least a
plurality of groups of RS configurations, where the first group can be used for channel measurement, the second group can include NZP CSI-RS and/or CSI-IM used for interference measurement, and the third group can include sensing RS or positioning RS used for interference measurement. In certain implementations, for CSI measurement, a measurement report can be configured with at least two groups of RS configurations, where the first group can be used for channel measurement and the second group can be used for interference measurement. In certain implementations, for CSI measurement, a measurement report can be configured with at least two groups of RS configurations, where the second group can be used for channel measurement and the first group can be used for interference measurement. To measure the interference from sensing, the group can include positioning or sensing RS. In certain implementations, the first or second group can include more than one type of RS for channel or interference measurement.
In certain implementations/embodiments, for positioning purposes, a single port positioning RS can be sufficient. For DL wireless positioning, a UE can receive positioning reference signals from multiple TRPs. As shown in FIG. 9, each resource can correspond to each beam, e.g., PRS beams can be from gNB0 and gNB1, respectively, and can report the measurement results to location management function (LMF) . For UL wireless positioning, the base stations can receive positioning reference signals from UE and can report the measurement results to LMF via LPP signaling. The measurement results may include at least one of the following elements: RSRP/RSRPP; timing of arrival, e.g., TOA, TDOA, or Rx-Tx timing difference; AOA; resource ID (or beam ID) ; and/or TRP ID. In high frequency bands, beam sweeping may be desirable, e.g., the transmitter side can transmit multiple beams to get high beamforming gain. In certain implementations, a staggered RS pattern for positioning can be adopted in NR, as shown in FIG. 10.
In certain implementations, for sensing purposes, a new RS can be introduced, which can be expected to have a similar pattern or design as positioning. The RS pattern can be different from CSI-RS. In certain implementations, a single port can be sufficient. For CSI measurement, especially for L1-SINR measurement or single-port CQI, CRI, SSBRI, and LI reports, positioning RS or sensing RS can be configured for channel measurement and/or interference measurement. In certain implementations, for a physical layer measurement report, a first type of RS configuration, e.g., positioning RS or sensing RS, can be configured for
channel measurement and/or interference measurement. In certain implementations, for a physical layer measurement report, a first group of RS configuration, e.g., positioning RS and/or sensing RS, can be configured for channel measurement. In certain implementations, a second group of RS configuration can be configured for interference RS, where the second group of RS is not positioning RS or sensing RS. In certain implementations, the second group of RS can be CSI-RS and/or CSI-IM.
In certain implementations/embodiments, for CSI channel measurement, relying on single-port positioning RS or sensing RS may not be sufficient, even though the RSRP, power, delay, Doppler, and/or Doppler information can be measured by sensing RS and positioning RS. This may be because the digital precoder is to be measured and achieved based on RS with multiple ports. In certain implementations, as shown in FIG. 11, at least two groups of RS configurations can be configured, where the first group and the second group can be used for channel measurement, and the third group can be used for interference measurement. In some implementations, the third group may not be configured. In certain implementations, the first group can be used for CSI set 1 estimation, for example, at least for RI or PMI estimation. In certain implementations, the second group can be used for CSI set 2 estimation, for example, at least for Doppler estimation or frequency offset estimation. In certain implementations, the second group may include positioning RS or sensing RS. In certain implementations, the first group and the second group resources or resource sets can be mapped one-to-one or one-to-many. For example, M1 resources in the first group and M1 resources in the second group can be mapped one-to-one. In some implementations, M2 resources in the first group can be associated with M2 resources in the second group.
In certain implementations/embodiments, at least four groups of RS configuration can be configured, where the first group and the second group can be used for channel measurement, and the third group and the fourth group can be used for interference measurement. The first group can be used for CSI set 1 estimation, for example, at least for RI or PMI estimation. The second group can be used for CSI set 2 estimation, for example, at least for Doppler estimation or frequency offset estimation. The second group may include positioning RS or sensing RS. The fourth group for interference measurement may include positioning RS or sensing RS. In certain implementations, a set A positioning or sensing RS can be configured for channel
measurement, and a set B positioning or sensing RS can be configured for interference measurement. In certain implementations, the positioning RS or sensing RS may include the pattern configuration, such as bandwidth, the number of symbols, comb offset, comb size, periodicity, and/or sequence ID. If the sensing receiver can detect the RS based on the sequence ID, the corresponding interference can be detected accurately without noise and further cancel the corresponding interference. In some implementations, the sequence ID may not be included. In some implementations, the sensing receiver may only detect the whole interference with noise. In certain implementations, the receiver may assume that the power received in the positioning or sensing RS REs is interference. In short, for a measurement report, two groups of RS can be configured for channel measurement and interference measurement, respectively. For each group, multiple types of RS can be configured for the same or different functions.
In certain implementations/embodiments, positioning RS or sensing RS in the spatial relation, TCI, or QCL configuration can be configured as a reference or source. The positioning RS or sensing RS can be configured together with other RS, such as SSB, CSI-RS for the QCL or spatial relation, or TCI source for other targeted RS, such as data DMRS, CSI-RS, or TRS.
In certain implementations/embodiments, positioning RS or sensing RS can be configured for interference measurement and reporting. In certain implementations, there may be no RS configured for channel measurement. In certain implementations, from the BS side, the BS may not know which positioning RS or sensing RS resources, resource sets, or resource configurations can cause serious interference to a UE or a BS during communication. In certain implementations, network units, such as sensing function (SF) or LMF can know/determine the UE location and positioning RS or sensing RS configuration of each TRP around the UE. In certain implementations, SF, LMF, or a network entity can know/determine which positioning RS or sensing RS configuration can cause serious interference to UE.
In certain implementations, a network unit, such as SF or LMF, or another network unit can recommend or request a BS or UE to use a plurality of sensing or positioning RS for interference measurement or channel measurement. It is to be noted that such UE or BS may not have positioning or sensing services, e.g., the positioning or sensing results may not be desired for reporting. In certain implementations, UE or BS can estimate the interference caused by
positioning RS or sensing RS and can remove the interference based on the advanced receiver. In this regard, the network units, e.g., LMF or SF, can recommend or request a BS or a UE to use a plurality of sensing or positioning RS. In certain implementations, such RS can cause serious interference with the communication between a UE and a BS. In certain implementations, a BS can indicate to a UE whether to perform interference measurement. In certain implementations, if the caused interference cannot be mitigated at the UE side, the UE can perform rate matching or puncture around the positioning RS or sensing RS REs or symbols to avoid interference. The UE behavior may be different when the UE performs rate matching (or puncture) and removes the interference.
In certain implementations, a BS can configure a UE with a plurality of positioning RS or sensing RS configurations. The plurality of positioning RS or sensing RS configurations can be used for rate matching or puncturing when receiving data, such as PDSCH. In such cases, the RS configurations may not include RS sequence parameters, such as sequence type or ID. This may be because UE need not decode or detect the RS sequence for PDSCH rate matching or puncturing. In certain implementations, the plurality of positioning RS or sensing RS configurations can be used for UE to perform interference cancellation when receiving data (no need to perform rate matching or puncturing then) . In such cases, the RS configuration may include RS sequence parameters. In some implementations, the UE behavior may depend on whether the RS sequence parameters are configured or not.
In certain implementations, the BS can explicitly indicate to the UE whether to perform rate matching, puncture mitigation, or interference mitigation. For example, as shown in FIG. 12, the SF (or LMF or BS1) can send/transmit/provide a recommendation or request signaling to BS 2. The signaling can include a plurality of sensing RS or positioning RS, which can cause serious interference for the communication between a UE and the serving BS 2, e.g., RS 1 transmitted from BS1. In some implementations, where RS 3 transmitted from BS 3 is not causing serious interference to the communication between UE 2 and BS2, the SF may not recommend RS 3 to BS 2. In certain implementations, the BS 2 can inform the UE 2 of a plurality of RS for data reception. For example, at the UE side, the UE can perform rate matching around the RS resources configured by BS2. In some implementations, the UE can perform interference mitigation depending on whether the RS sequence parameters are
configured or not. It is to be noted that the RS requested from SF to BS and the RS configured from BS to UE can be independent, e.g., can be the same or different. It is to be noted that the positioning RS or sensing RS may include the RS transmitted from BS or from UE.
In certain implementations/embodiments, for a measurement report, two groups of the associated measurement signal configurations (e.g., reference signals) can be configured. The first group can be used for channel measurement. In the case where the second group is not configured, the first group can be used for channel and/or interference measurement. In some implementations, the first group may include a plurality of measurement signal configurations that belong to different types of signals, including at least one of the following: reference signal for CSI, e.g., CSI-RS; positioning signal, e.g., positioning RS; and/or sensing signal, e.g., sensing RS. In some implementations, a first type of signal in the group can be used for a first set of channel measurement functions, and a second type of signal in the group can be used for a second set of channel measurement functions. In some implementations, there can be an association between different types of signals in the group that is configured or specified.
In certain implementations, the second group can be used for interference measurement. In the case where the first group is not configured, the UE can report the interference measurement results to BS. The measurement results may include RSSI or RSRP. In some implementations, the second group may include sensing signal configuration or positioning signal configuration. The second group may include a plurality of measurement signal configurations that belong to different types of signals, including at least one of the following: reference signal for CSI, e.g., CSI-RS; positioning signal, e.g., positioning RS; and/or sensing signal, e.g., sensing RS. In some implementations, a first type of signal in the group can be used for a first set of interference measurement functions, and a second type of signal in the group can be used for a second set of interference measurement functions. In some implementations, a first type of signal in the group can be a DL signal, and a second type of signal in the group can be an UL signal. For instance, the UE2 can receive a first configuration for the first group of at least one DL RS to be received by the UE2, including a sensing RS, and the UE can receive a second configuration for the second group of at least one RS, different from the first configuration. This may be useful to perform interference measurements caused by DL signals and/or UL signals from neighboring cells. In some implementations, there can be an
association between different types of signals in the group that is configured or specified. In certain implementations, the first group can be used for interference measurement, and the second group can be used for channel measurement.
In certain implementations, the association of the signals between the first group and the second group can be specified or configured by BS to UE. For example: one signal resource in the first group can be associated with one signal resource in the second group; one signal resource in the first group can be associated with signal resources in the second group; one signal resource in the first group can be associated with signal resources of the same type in the second group; and/or one signal resource in the first group can be associated with M> 1 signal resource in the second group.
In certain implementations, only the first or second group of RS can be configured to UE by BS, even if the UE has no sensing or positioning service, where the group of RS includes positioning or sensing RS. In such cases, the RS configuration can be used for data reception, for example, to perform rate matching or interference cancellation. In such cases, there may be no need/desire to associate the RS configuration with a measurement report.
Referring now to FIG. 13, which illustrates a flow diagram of a method 1300 for improving channel state information measurement accuracy. The method 1300 may be implemented using any of the components and devices detailed herein in conjunction with FIGS. 1–12. In an overview, the method 1300 may include a wireless communication device receiving a first configuration of a first group of at least one reference signal (RS) that includes a sensing or positioning RS from a wireless communication node (STEP 1302) . The method may include the wireless communication device receiving a second configuration of a second group of at least one RS, with the second configuration differing from the first configuration, from the wireless communication node (STEP 1304) . The method may include the wireless communication device sending a measurement report to the wireless communication node (STEP 1306) . The method may include a wireless communication node sending a first configuration of a first group of at least one reference signal (RS) that includes a sensing or positioning RS to a wireless communication device (STEP 1308) . The method may include the wireless communication node sending a second configuration of a second group of at least one RS, with the second
configuration differing from the first configuration, to the wireless communication device (STEP 1310) . The method may include the wireless communication node receiving a measurement report from the wireless communication device (STEP 1312) .
In certain configurations, wireless communication device (e.g., UE2) can receive/obtain/acquire a first configuration of a first group of at least one reference signal (RS) that includes a sensing or positioning RS from a wireless communication node (e.g., BS2) (STEP 1302) . The wireless communication device can receive a second configuration of a second group of at least one RS from the wireless communication node (STEP 1304) . The second configuration can be different from the first configuration. The wireless communication device can send/transmit/provide a measurement report to the wireless communication node (STEP 1306) . In certain configurations, the wireless communication device can send/transmit/provide the measurement report according to the first configuration and the second configuration to the wireless communication node. In certain configurations, the first configuration can be for interference measurement (e.g., interference observed/measured at the UE2, based on RS sent from BS1 to UE1) . In certain configurations, the second configuration can be for channel measurement (e.g., using CSI-RS received by UE2 from BS2 to determine CSI) .
In certain configurations, in a case in which the second group is not received by the wireless communication device, the measurement report may include a result of interference measurement based on the first group. In certain configurations, in a case in which the first group is not received by the wireless communication device, the measurement report may include a result of at least one of channel measurement or interference measurement, based on the second group. In certain configurations, the first group may further include another type of RS different from the sensing or positioning RS. In certain configurations, the second configuration may include a plurality of configurations for one or more types of RSes. The one or more types of RSes may include at least one of the following: a channel state information (CSI) RS; a CSI-RS with non-zero power (NZP) ; a RS for sensing; a RS for positioning; a RS for synchronization; or another type of RS. In certain configurations, the another type of RS of the first group may include at least one of the following: a channel state information (CSI) RS; a CSI-RS with non-zero power (NZP) ; a CSI interference measurement (CSI-IM) RS; an RS transmitted from another wireless communication device; or another type of RS.
In certain configurations, within the first group, a first type of RS can be used for a first set of interference measurement, and a second type of RS can be used for a second set of interference measurement. In some implementations, within the second group, a first type of RS can be used for a first set of channel or interference measurement, and a second type of RS can be used for a second set of channel or interference measurement. In certain configurations, an association of RSes between the first group and the second group can be specified or configured by the wireless communication node to the wireless communication device. In certain configurations, a resource or resource set of a RS in the first group can be associated with a resource or resource set of a RS in the second group; a resource or resource set of a RS in the first group can be associated with all resources or resource sets of a RS in the second group; a resource of a RS in the first group can be associated with all or a plurality of resources in the second group, in which the resource in the first group and the all or a plurality of resources in the second group are of a same type of RS; or a resource of a RS in the first group can be associated with a plurality of signal resources in the second group.
In certain configurations, within the first group or the second group, an association between different types of RSes can be specified or configured by the wireless communication node. In certain configurations, within the first group or the second group, at least one of the following may be included: a resource or resource set of a first type of RS can be associated with a resource or resource set of a second type of RS; a resource or resource set of the first type of RS can be associated with a plurality of resources or resource sets of the second type of RS; or a resource or resource set of the first type of RS can be associated with all resources or resource sets of the second type of RS.
In certain configurations, a respective measurement report of the interference measurement can be different between a case for which the RS sequence parameters are configured and a case for which the RS sequence parameters are not configured via the first configuration. In some implementations, a respective behavior of the wireless communication device can be different between the case for which the RS sequence parameters are configured and the case for which the RS sequence parameters are not configured via the first configuration. In certain configurations, in the case for which the RS sequence parameters are configured via the first configuration, the wireless communication device can perform interference mitigation.
In some implementations, in the case for which the RS sequence parameters are not configured via the first configuration, the wireless communication device can perform rate matching or puncturing.
In certain configurations, the wireless communication node can receive a request or recommendation from a network node (e.g., sensing function (SF) , LMF, or BS1) regarding the first configuration. In certain configurations, the wireless communication device may not provide sensing or positioning service (e.g., the wireless communication device may not report sensing or positioning measurement results in the measurement report) .
In certain configurations, a wireless communication node can send/transmit/provide a first configuration of a first group of at least one reference signal (RS) that includes a sensing or positioning RS to a wireless communication device (STEP 1308) . The wireless communication node can send a second configuration of a second group of at least one RS to the wireless communication device (STEP 1310) . The second configuration can be different from the first configuration. The wireless communication node can receive a measurement report from the wireless communication device (STEP 1312) .
While various embodiments/implementations of the present solution have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. Likewise, the various diagrams may depict an example architecture or configuration, which are provided to enable persons of ordinary skill in the art to understand example features and functions of the present solution. Such persons would understand, however, that the solution is not restricted to the illustrated example architectures or configurations but can be implemented using a variety of alternative architectures and configurations. Additionally, as would be understood by persons of ordinary skill in the art, one or multiple features of one embodiment/implementation can be combined with one or multiple features of another embodiment/implementation described herein. Thus, the breadth and scope of the present disclosure should not be limited by any of the above-described illustrative embodiments.
It is also understood that any reference to an element herein using a designation such as “first, ” “second, ” and so forth does not generally limit the quantity or order of those elements.
Rather, these designations can be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements can be employed, or that the first element must precede the second element in some manner.
Additionally, a person having ordinary skill in the art would understand that information and signals can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, and symbols, which may be referenced in the above description, can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
A person of ordinary skill in the art would further appreciate that any of the various illustrative logical blocks, modules, processors, means, circuits, methods and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., a digital implementation, an analog implementation, or a combination of the two) , firmware, various forms of program or design code incorporating instructions (which can be referred to herein, for convenience, as “software” or a “software module) , or any combination of these techniques. To clearly illustrate this interchangeability of hardware, firmware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware or software, or a combination of these techniques, depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in various ways for each particular application, but such implementation decisions do not cause a departure from the scope of the present disclosure.
Furthermore, a person of ordinary skill in the art would understand that various illustrative logical blocks, modules, devices, components, and circuits described herein can be implemented within or performed by an integrated circuit (IC) that can include a general purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, or any combination thereof. The logical blocks, modules, and circuits can further include antennas and/or
transceivers to communicate with various components within the network or within the device. A general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine. A processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or multiple microprocessors in conjunction with a DSP core, or any other suitable configuration to perform the functions described herein.
If implemented in software, the functions can be stored as one or multiple instructions or code on a computer-readable medium. Thus, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program or code from one place to another. A storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.
In this document, the term “module” as used herein, refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, for purpose of discussion, the various modules are described as discrete modules; however, as would be apparent to one of ordinary skill in the art, two or more modules may be combined to form a single module that performs the associated functions according to embodiments of the present solution.
Additionally, memory or other storage, as well as communication components, may be employed in embodiments of the present solution. It will be appreciated that, for clarity purposes, the above description has described embodiments of the present solution with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements or domains may be used without detracting from the present solution. For example, functionality illustrated to be performed by separate processing logic elements, or controllers,
may be performed by the same processing logic element, or controller. Hence, references to specific functional units are only references to a suitable means for providing the described functionality, rather than indicative of a strict logical or physical structure or organization.
Various modifications to the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the scope of this disclosure. Thus, the disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the novel features and principles disclosed herein, as recited in the claims below.
Claims (21)
- A method comprising:receiving, by a wireless communication device from a wireless communication node, a first configuration of a first group of at least one reference signal (RS) that includes a sensing or positioning RS;receiving, by the wireless communication device from the wireless communication node, a second configuration of a second group of at least one RS, the second configuration different from the first configuration; andsending, by the wireless communication device to the wireless communication node, a measurement report.
- The method of claim 1, comprising:sending, by the wireless communication device to the wireless communication node, the measurement report according to the first configuration and the second configuration.
- The method of claim 1 or 2, wherein the first configuration is for interference measurement.
- The method of claim 1 or 2, wherein the second configuration is for channel measurement.
- The method of any one of claims 1-4, wherein in a case in which the second group is not received by the wireless communication device, the measurement report is to include a result of interference measurement based on the first group.
- The method of any one of claims 1-4, wherein in a case in which the first group is not received by the wireless communication device, the measurement report is to include a result of at least one of channel measurement or interference measurement, based on the second group.
- The method of any one of claims 1-6, wherein the first group further includes another type of RS different from the sensing or positioning RS.
- The method of any one of claim 1-6, wherein at least one of:the second configuration includes a plurality of configurations for one or more types of RSes, the one or more types of RSes comprising at least one of;a channel state information (CSI) RS;a CSI-RS with non-zero power (NZP) ;a RS for sensing;a RS for positioning;a RS for synchronization; oranother type of RS.
- The method of claim 7, wherein at least one of:the another type of RS of the first group includes at least one of:a channel state information (CSI) RS;a CSI-RS with non-zero power (NZP) ;a CSI interference measurement (CSI-IM) RS;an RS transmitted from another wireless communication device; oranother type of RS.
- The method of any one of claims 1-9, wherein at least one of:within the first group, a first type of RS is used for a first set of interference measurement, and a second type of RS is used for a second set of interference measurement; orwithin the second group, a first type of RS is used for a first set of channel or interference measurement, and a second type of RS is used for a second set of channel or interference measurement.
- The method of any one of claims 1-9, wherein an association of RSes between the first group and the second group is specified or configured by the wireless communication node to the wireless communication device.
- The method of claim 11, wherein at least one of:a resource or resource set of a RS in the first group is associated with a resource or resource set of a RS in the second group;a resource or resource set of a RS in the first group is associated with all resources or resource sets of a RS in the second group;a resource of a RS in the first group is associated with all or a plurality of resources in the second group, in which the resource in the first group and the all or a plurality of resources in the second group are of a same type of RS; ora resource of a RS in the first group is associated with a plurality of signal resources in the second group.
- The method of any one of claims 1-9, wherein within the first group or the second group, an association between different types of RSes is specified or configured by the wireless communication node.
- The method of claim 13, wherein within the first group or the second group, at least one of:a resource or resource set of a first type of RS is associated with a resource or resource set of a second type of RS;a resource or resource set of the first type of RS is associated with a plurality of resources or resource sets of the second type of RS; ora resource or resource set of the first type of RS is associated with all resources or resource sets of the second type of RS.
- The method of claim 3, wherein at least one of:a respective measurement report of the interference measurement is different between a case for which the RS sequence parameters are configured and a case for which the RS sequence parameters are not configured via the first configuration; ora respective behavior of the wireless communication device is different between the case for which the RS sequence parameters are configured and the case for which the RS sequence parameters are not configured via the first configuration.
- The method of claim 15, comprising at least one of:in the case for which the RS sequence parameters are configured via the first configuration, performing, by the wireless communication device, interference mitigation, orin the case for which the RS sequence parameters are not configured via the first configuration, performing, by the wireless communication device, rate matching or puncturing.
- The method of claim 1 or 3, wherein the wireless communication node receives a request or recommendation from a network node regarding the first configuration.
- The method of any one of claims 1-17, wherein the wireless communication device does not provide sensing or positioning service.
- A method comprising:sending, by a wireless communication node to a wireless communication device, a first configuration of a first group of at least one reference signal (RS) that includes a sensing or positioning RS;sending, by the wireless communication node to the wireless communication device, a second configuration of a second group of at least one RS, the second configuration different from the first configuration; andreceiving, by the wireless communication node from the wireless communication device, a measurement report.
- A non-transitory computer readable medium storing instructions, which when executed by at least one processor, cause the at least one processor to perform the method of any one of claims 1-19.
- An apparatus comprising:at least one processor configured to perform the method of any one of claims 1-19.
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