Patent Description:
The present disclosure relates generally to communication systems, and more particularly, to interference measurement and reporting.

The US patent application publication <CIT> Al describes a method for a base station processing an in-band emission interference signal caused when the basestation operating in Full Duplex Radio (FDR) mode transceives signals using a Frequency Division Multiplexing (FDM) manner includes transmitting a downlink signal in a flexible downlink duration of an uplink band, and processing the in-band emissioninterference signal caused by the transmission of a downlink signal in an uplink duration of the UL band. The processing of the in-band emission interference signal is performed by puncturing a corresponding resource in the UL duration, wherein the resource on the DL signal is transmitted is mirrored to the corresponding resource of the UL duration from a Direct Current (DC) subcarrier as a reference.

The sole purpose of the summary is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

Full duplex (FD) communication is a wireless communication method that supports simultaneous transmission and reception of information over a same frequency band. In this manner, spectral efficiency can be improved over half duplex (HD) communication, which only supports transmission/reception of information in one direction at a time. Due to the simultaneous nature of FD communication, a user equipment (UE) may experience self-interference caused by signal leakage from the UE's local transmitter to the UE's local receiver. Interference (e.g., UE self-interference or interference caused by other equipment) may impact a quality of the information communicated to/from the UE.

Accordingly, described herein are systems, devices, apparatuses, and methods, including computer programs encoded on storage media, for interference measurement and reporting by a UE. The interference measurement may be self-initiated by the UE or initiated via a request received from a base station (BS). Upon initiation of the interference measurement, the UE transmits a first signal in uplink (UL) resources to a first BS concurrently with receiving a second signal in downlink (DL) resources. The first signal may be a sounding reference signal (SRS), which facilitates estimating a quality of the UL resources over a given bandwidth. The second signal may be received from the first BS or from a second BS. In either case, the received second signal includes interference associated with the transmitted first signal.

The UE determines a level of the interference that is associated with the transmitted first signal, based on the received second signal. For example, the interference measurement may be performed in a given number of resource elements (REs) or resource blocks (RBs) adjacent to the UL resources, such that the UE can identify a number of the adjacent REs or RBs from the UL resources at which the interference is below a predefined level. The identified number of the adjacent REs or RBs from the UL resources defines a width of a guard band that is to be incorporated between the UL resources and the DL resources. Information associated with the determined level of interference (e.g., the width of the guard band) is then transmitted to the first BS.

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided for wireless communication. The apparatus includes a memory and at least one processor coupled to the memory. The memory includes instructions which, when executed by the processor, cause the processor to transmit a first signal in UL resources to a first base station and receive a second signal in DL resources concurrently with the transmission of the first signal to the first base station. The received second signal includes interference associated with the transmitted first signal. The at least one processor is further configured to determine a level of the interference received in the second signal that is associated with the transmitted first signal, and transmit the information associated with the determined level of interference to the first base station.

To the accomplishment of the foregoing and related ends, the one or more aspects include the features hereinafter fully described and particularly pointed out in the claims. Such features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents.

The third backhaul links <NUM> may be wired or wireless.

The communication links may be via one or more carriers. Allocation of carriers may be asymmetric with respect to the DL and the UL (e.g., more or fewer carriers may be allocated for the DL than for the UL).

Some of the UEs <NUM> may be referred to as loT devices (e.g., parking meter, gas pump, toaster, vehicles, heart monitor, etc.).

Referring again to <FIG>, in certain aspects, the UE <NUM> is configured to transmit a first signal in UL resources to the base station <NUM>; receive a second signal in DL resources concurrently with transmission of the first signal; determine interference in the second signal; and transmit information associated with the interference to the base station (<NUM>). Although the following description may be focused on 5GNR, the concepts described herein may be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

The symbols on the DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also referred to as single carrier frequency-division multiple access (SC-FDMA) symbols) (for power limited scenarios; limited to a single stream transmission).

Each time slot includes a resource block (RB) (also referred to as a physical RB (PRB)) that extends <NUM> consecutive subcarriers.

Wireless communication systems may be configured to share available system resources and provide various telecommunication services (e.g., telephony, video, data, messaging, broadcasts, etc.) based on multiple-access technologies such as CDMA systems, TDMA systems, FDMA systems, OFDMA systems, SC-FDMA systems, TD-SCDMA systems, etc. that support communication with multiple users. In many cases, common protocols that facilitate communications with wireless devices are adopted in various telecommunication standards. For example, communication methods associated with eMBB, mMTC, and URLLC may be incorporated in the <NUM> NR telecommunication standard, while other aspects may be incorporated in the <NUM> LTE standard. As mobile broadband technologies are part of a continuous evolution, further improvements are needed in mobile broadband to continue the progression of such technologies.

<FIG> illustrate modes of FD communication. FD communication is a wireless communication method that supports simultaneous transmission and reception of information over a same frequency band. In this manner, spectral efficiency may be improved over HD communication, which only supports transmission or reception of information in one direction at a time. Due to the simultaneous Tx/Rx nature of FD communication, a UE or a BS may experience self-interference caused by signal leakage from the UE's local transmitter to the UEs local receiver. In addition, the UE or BS could likewise experience interference from other devices, such as transmissions from a second UE or a second BS. Such interference (e.g., self-interference or interference caused by other devices) may impact a quality of information communicated via the signal, or even lead to a loss of the information altogether.

<FIG> shows a first configuration <NUM> in which a first BS 402a is in communication with a first UE 404a and a second UE 406a. The first BS 402a is a FD BS, whereas the first UE 404a and the second UE 406a may be configured as either a HD UE or a FD UE. The second UE 406a may transmit a fist signal in UL resources to the first BS 402a as well as to other BSs, such as a second BS 408a in proximity to the second UE 406a. The first BS 402a and the second BS 408a may be configured as either an eNB or a gNB. In <FIG>, the first BS 402a transmits a second signal in DL resources to the first UE 404a concurrently with receiving the first signal in UL resources from the second UE 406a. Accordingly, self-interference may occur at the first BS 402a as a result of the second signal and the first signal being communicated simultaneously. Further interference may occur at the first BS 402a via signals emitted from the second BS 408a. Interference may also occur at the first UE 404a based on such signals emitted from the second BS 408a as well as from UE-based signals emitted by the second UE 406a.

<FIG> shows a second configuration <NUM> in which a first BS 402b is in communication with a first UE 404b. The first BS 402b is a FD BS and the first UE 404b is a FD UE. That is, the first BS 402b can receive a first signal in UL resources from the first UE 404b concurrently with transmitting a second signal in DL resources to the first UE 404b; and the first UE 404b can receive the second signal in DL resources from the first BS 402b concurrently with transmitting the first signal in UL resources to the first BS 402b. Accordingly, self-interference may occur at either or both of the first BS 402b and/or the first UE 404b as a result of the first signal and the second signal being simultaneously communicated between the first BS 402b and the first UE 404b. Further interference may also occur at the first UE 404b based on one or more signals emitted from a second UE 406b and/or a second BS 408b in proximity to the first UE 404b. The first BS 402b and the second BS 408b can be configured as either an eNB or a gNB.

<FIG> shows a third configuration <NUM> in which a first UE 404c is in communication with a first BS 402c and a second BS 408c. The first UE 404c is a FD UE for which the first BS 402c and the second BS 408c serve as multiple transmission and reception points (multi-TRPs) for UL and DL resources. In an example, the second BS 408c may be in communication with a second UE 406c and transmit further DL resources thereto. In <FIG>, the first UE 404c is configured to transmit an a first signal in UL resources to the first BS 402c concurrently with receiving a second signal in DL resources from the second BS 408c. Accordingly, self-interference may occur at the first UE 404c as a result of the first signal and the second signal being communicated simultaneously. Further interference may also occur at the first UE 404c via UE-based signals emitted from the second UE 406c.

<FIG> illustrate a first example <NUM> and a second example <NUM> of resources that are in-band full duplex (IBFD). In general, FD operations can be grouped into two categories: (<NUM>) IBFD, and (<NUM>) sub-band flexible division duplex (sub-band FDD). In IBFD, signals are transmitted and received at a same time and frequency. As shown in the first example <NUM>, a time and a frequency of a UL band <NUM> may fully overlap with a time and a frequency of a DL band <NUM>; or as alternatively shown in the second example <NUM>, a time and a frequency allocation for an UL band <NUM> may partially overlap with a time and a frequency allocation for a DL band <NUM>. In either case, the FD operations correspond to IBFD.

IBFD is in contrast to sub-band FDD, where a UL band and a DL band (while still transmitted and received at a same time) are transmitted and received at different frequencies. In particular, the DL band is separated from the UL band in the frequency domain for sub-band FDD operations (e.g., by separating the UL band and the DL band with a guard band or by utilizing a UL band and a DL band that are immediately adjacent to each other in which a corresponding guard band width would be <NUM>). Given that output signals from a UE transmitter can have a leakage that extends outside the UL band, a guard band of some width can be advantageous for reducing interference between UL resources and DL resources. Sub-band FDD may also be referred to as "flexible duplex.

<FIG> is a call flow diagram <NUM> illustrating communications between a UE <NUM> and at least one BS (<NUM> and/or <NUM>). <FIG> illustrate interference thresholds in relation to UL resources and DL resources, where the interference thresholds may be used to define a size of a guard band that is to be incorporated between the UL resources and the DL resources.

Referring back to <FIG>, at <NUM>, the UE <NUM> transmits a first signal in UL resources to the BS <NUM>. The first signal may be a SRS or may be data (on a PUSCH) or control information (on a PUCCH). At 610a/610b, the UE <NUM> receives a second signal in DL resources concurrently with the UE <NUM> transmitting the first signal, where the DL resources are adjacent or nearly adjacent to the UL resources. The UE <NUM> may receive at 610a the second signal from the BS <NUM> or may receive at 610b the second signal from the BS <NUM>. At <NUM>, the UE determines a level of the interference received in the second signal that is associated with the transmitted first signal. Transmission of the first signal in the UL by the UE <NUM> self-interferes with the reception of the second signal in the DL by the UE <NUM>, as the UL resources are close in frequency to the DL resources, and the first signal is received in some form as interference with the second signal. At <NUM>, the UE <NUM> transmits information associated with the determined interference level to the BS <NUM>.

Referring to <FIG>, as illustrated via noise threshold 710a, the UE <NUM> may only be configured to suppress a certain level of interference caused by leakage from its transmitter. Thus, a guard band may need to be incorporated between the UL resources <NUM> and the DL resources <NUM>. In order to minimize the waste of frequency resources caused by excessive separation between the UL resources <NUM> and the DL resources <NUM>, it is desirable to identify a minimum size of a guard band that would keep the interference below a threshold amount.

Adjacent channel leakage ratio (ACLR) measurements by the UE <NUM> may be performed online or offline. When ACLR is performed offline and a threshold is already known for a given bandwidth, power, waveform, etc., the ACLR measurement may be compared to an interference threshold 706a such that a guard band may be identified without having the UE <NUM> measure the level of interference. Nevertheless, when the UE <NUM> is surrounded by clutter such as metallic clutter, online refinement may improve interference measurement accuracy, as clutter may cause changes in characteristics of the self-interference. For example, in industrial loT, online refinement may improve measurement accuracy for a UE <NUM> that is incorporated in machinery comprising a metallic structure.

The UE <NUM> is configured to measure its residual self-interference based on a reference signal (RS) and report a desired guard band to the BS <NUM>. The guard band may be reported in terms of a number of RBs or REs from the UL resources <NUM> at which the interference is below a threshold level. Upon measuring the interference and identifying a given noise threshold 710a, the UE <NUM> may determine the minimum number of REs or RBs that are needed for the guard band.

The RS can be either a SRS or a CSI-RS. In order to measure self-interference the UE <NUM> has to transmit some signal (e.g., the first signal transmitted in UL resources at <NUM>). For example, a SRS is transmitted in the UL band and interference is measured in a given number of REs or RBs adjacent to the UL band. That is, the UE <NUM> may transmit the SRS and, at the same time, measure leakage at one or more locations below the UL resources <NUM> in frequency. In this example, it is possible that nothing else is being received in the DL band allocation, except for the leakage, thereby allowing the UE <NUM> to determine a strength of the leakage in the DL band allocation. Additionally or alternatively, the UE <NUM> can receive CSI-RS and measure the interference at the one or more locations below the UL resources <NUM> in frequency, similar to CSI interference measurement (CSI-IM) procedures. CSI-RS may be initially received prior to transmitting the first signal at <NUM>; then, the CSI-RS is received again concurrently with transmitting the first signal at <NUM> (e.g., SRS, data, control signals, etc.) and compared to the initially received CSI-RS to determine how the CSI-RS is impacted by transmission of the first signal at <NUM>. The channel quality is measured at the one or more locations below the UL resources <NUM> in frequency and a size of the guard band can be determined based thereon.

A bandwidth of the RS used for self-interference measurement affects measurement configurations, as the interference threshold 706a is manipulated based on a size of the RS bandwidth. It can be observed that SRS transmitted over a smaller UL bandwidth than, for example, that of the UL resources <NUM> would causes less interference since a smaller bandwidth corresponds to an interference threshold that rises at a slower rate than that of the interference threshold 706a. Interference measurement can be further dependent upon a type of the waveform (e.g., CP-OFDM or DFT-s-OFDM). More or less interference may result from waveforms of different types. Therefore, different waveforms may have different corresponding measurement configurations.

The noise threshold 710a may be configured by the network and/or be dependent upon a capability of the UE <NUM>. The noise threshold 710a represents some upper noise value that the UE <NUM> is configured to suppress. The noise value may be identified by the network, where the network may instruct the UE <NUM> to only accept a noise value up to X amount, thereby allowing the network to control the rest of the UE's band allocation. In a further example, a first UE may be capable of suppressing more interference than a second UE, such that the noise threshold (e.g., noise thresholds 710a and 710b) may be set based on a capability of the corresponding UE. For instance, some UEs may execute interference cancellation (IC) algorithms that change the noise value that the UE can suppress. <FIG> represents an example in which an IC algorithm is executed by a UE. When compared to <FIG>, an intersection 708b of the noise threshold 710b and the interference threshold 706b is in a higher subcarrier than an intersection 708a of the noise threshold 710a and the interference threshold 706a. A threshold value at these intersections 708a and 708b may be expressed in terms of rise over thermal noise (e.g., desense). A width of the guard band may then be defined based on the subcarrier that crosses through the threshold value located at the intersections 708a and 708b.

The UE <NUM> measures its interference in N adj acent REs or RBs from at least one side of its UL transmission, where N is either configured by the network or left to UE implementation. In cases where interference is measured on both sides of the UL resources <NUM>, the UE <NUM> may measure interference in N adjacent REs or RBs from each side of the UL resources <NUM>; or measure interference in N adjacent REs or RBs from a first side of the UL resources <NUM> and M adjacent REs or RBs from a second side of the UL resources <NUM>, where N and M are different. Measurement configuration can also be dependent upon a total number of REs or RBs in the UL band and/or a Tx power level, as a higher Tx power in the UL band increases leakage from the transmitter.

The UE <NUM> reports the measured interference and/or the guard band size in terms of RBs or REs, as for example via transmission <NUM>. When the UE reports the guard band to the BS <NUM> in terms of the number of RBs or REs, the report may be sent in PUCCH, if the payload to carry the report is small enough. When the UE <NUM> reports the measured interference to the BS <NUM>, the report may be transmitted in either PUCCH or PUSCH.

Self-interference measurements may be triggered either by the UE <NUM> or by the BS <NUM> (e.g., based on network traffic or other metrics). The BS <NUM> may transmit the request to initiate a self-interference measurement via RRC, a media access control-control element (MAC-CE), or DCI. The UE <NUM> may transmit the request to initiate a self-interference measurement based on a reference signal received power (RSRP) threshold. For instance, RSRP in the DL transmission that is below the RSRP threshold can be indicative of self-interference that may require a wider guard band. Such interference can be identified by the UE <NUM> based on a reduction in the RSRP, since any current guard band that is being used would allow a high level of interference to occur in the DL band at locations in frequency above the subcarrier that crosses through the intersection 708a. Additionally or alternatively, the UE <NUM> may transmit the request to initiate the self-interference measurement based on expiration of a measurement timer.

During the self-interference measurement, different UL transmissions of different UEs may be orthogonal, such that the UL transmissions of the different UEs do not interfere with each other's measurements. For example, if a second UE is transmitting close in frequency to the UE <NUM>, interference from the second UE may leak into a guard band defined for the UE <NUM>. This leakage into the guard band for the UE <NUM> may affect the accuracy of self-interference measurements performed by the UE <NUM>. Accordingly, the UL transmissions of the different UEs can be time division multiplexed (TDMed) to reduce interference with each other; or the UL transmissions can be separated by a larger guard band.

In some aspects, the UE <NUM> may be configured by the network to turn a UE IC capability on or off. Switching IC off may be performed for power saving purposes or when the UL bandwidth is too large to apply the IC, whereas switching IC on may be performed to reduce the leakage from the UL transmission so that, for example, more usable bandwidth can be packed into a smaller area. Furthermore, the IC capability may not necessarily be based on strict on/off switching. Different component configurations of the UE <NUM> may allow the IC capability to be partially turned on (e.g., performing IC at a level that is less than the UE's maximum IC capability).

The IC capability of the UE <NUM> may be reported to the BS <NUM> in an N-bit format, which is indicative of the different IC techniques that can be performed. For instance, a number of IC techniques that are possible for a given UE may be conveyed to the network based on <NUM>N possibilities. Further, the IC capability of the UE <NUM> may be reported to the BS <NUM> in terms of a number of kernels used during the IC, where kernels are processing features that are used in execution of the IC algorithm. While an increased number of kernels may provide better IC, the increased number of kernels can results in greater complexities for the UE <NUM>. In an exemplary configuration, the UE <NUM> may be capable of working on <NUM>-<NUM> kernels. The number of kernels may also be communicated to the network so that the network can perform tradeoff determinations between how much IC is desirable versus the complexity of performing the IC.

<FIG> illustrate FDD resources that are separated by a guard band. In <FIG>, a first FDD diagram <NUM> includes UL resources <NUM> that are located at a higher frequency than the DL resources <NUM>. A guard band <NUM> is incorporated between the UL resources <NUM> and the DL resources <NUM>. In <FIG>, a second FDD diagram <NUM> is illustrated that is similar to the first FDD diagram <NUM>, except that the respective UL resources <NUM> and DL resources <NUM> are inverted in comparison to the first FDD diagram <NUM>. Specifically, the UL resources <NUM> are located at a lower frequency than the DL resources <NUM>. A guard band <NUM> is incorporated between the UL resources <NUM> and the DL resources <NUM>. In both the first FDD diagram <NUM> and the second FDD diagram <NUM>, the UL resources (<NUM> and <NUM>) are located adjacent to their respective DL resources (<NUM> and <NUM>), albeit along opposite edges of the DL resources (<NUM> and <NUM>). The guard bands (<NUM> and <NUM>) may have a same width or a different width, depending on a level of interference measured by a UE above and below their respective UL resources (<NUM> and <NUM>).

In <FIG>, a third FDD diagram <NUM> is illustrated that includes UL resources <NUM> between first DL resources 824a and second DL resources 824b. A first guard band 826a is incorporated between the UL resources <NUM> and the first DL resources 824a; and a second guard band 826b is incorporated between the UL resources <NUM> and the second DL resources 824b. The first guard band 826a and the second guard band 826b may have a same width or a different width, depending on the level of interference measured by a UE on either side of the UL resources <NUM>. That is, an interference threshold (e.g., the interference thresholds 706a or 706b) may be mapped adjacent to the UL resources <NUM>, below and/or above the UL resources <NUM>, to determine a size of the guard bands (826a and 826b). The first guard band 826a and the second guard band 826b may further be of a same width or a different width than the guard bands (<NUM> and <NUM>).

<FIG> is a flowchart <NUM> of a method of wireless communication. The method may be performed by a UE (e.g., the UE <NUM>, which may include the memory <NUM> and which may be the entire UE <NUM> or a component of the UE <NUM>, such as the TX processor <NUM>, the RX processor <NUM>, and/or the controller/processor <NUM>).

At <NUM>, the UE <NUM> transmits a first signal in UL resources to a first BS (e.g., the BS <NUM>). The first signal may be a SRS, data (on a PUSCH), or control information (on a PUCCH).

At <NUM>, the UE <NUM> receives a second signal in downlink (DL) resources concurrently with the transmission of the first signal to the BS <NUM>. The second signal may be received from the BS <NUM> or from a second BS (e.g., the BS <NUM>) that is different from the BS <NUM>. The received second signal includes interference associated with the transmitted first signal, which may include interference associated with the transmitted SRS. Additionally or alternatively, the received second signal may include CSI-RS with interference associated with the transmitted first signal.

At <NUM>, an interference threshold is determined. The interference threshold may be based on a configuration received by the UE <NUM> or based on a UE capability of the UE <NUM>.

At <NUM>, a level of the interference received in the second signal that is associated with the transmitted first signal is determined by the UE <NUM>. For example, the level of interference may be determined by the UE <NUM> based upon at least one of a request received from the BS <NUM>, a determination that a RSRP of the RS is less than a threshold, or expiration of a timer.

At <NUM>, the UE <NUM> determines at least one of a number of REs or a number of RBs for a guard band (e.g., the guard band <NUM>) that is to be incorporated between the UL resources and the DL resources (e.g., the UL resources <NUM> and the DL resources <NUM>), where the determined level of interference due to the transmitted first signal within the DL resources immediately adjacent to the guard band is less than the interference threshold.

At <NUM>, the UE <NUM> transmits information associated with the determined level of interference to the BS <NUM>. The transmitted information indicates at least one of a number of REs or a number of RBs at which the determined level of interference is less than the interference threshold. The transmitted information associated with the at least one of the number of REs or the number of RBs may further define a size of the guard band (e.g., the guard band <NUM>) within the DL resources <NUM> and immediately adjacent to the UL resources <NUM>. The transmitted information may be transmitted in a report via at least one of a PUCCH or a PUSCH.

In certain configurations, the UE <NUM> may receive a third signal in second DL resources concurrently with transmission of the first signal to the BS <NUM>. The received third signal includes second interference associated with the transmitted first signal. In such cases (e.g., diagram <NUM>), the UL resources <NUM> are between the DL resources 824a and the second DL resources 824b. The UE <NUM> is configured to determine a second level of the second interference received in the third signal associated with the transmitted first signal and transmit the second information associated with the determined second level of the second interference to the BS <NUM>. The determination may be made separately from or concurrently with the determination of the first level of interference.

At <NUM>, the UE <NUM> may communicate with the BS <NUM> through the UL resources <NUM> and the DL resources <NUM>, excluding the guard band <NUM>. The UL resources may be TDMed with other UL resources associated with other UEs or frequency-division multiplexed (FDMed) with the other UL resources associated with the other UEs. With respect to the latter, the UL resources and the DL resources may be adjacent to each other (e.g., separated by a guard band but in proximity to each other) or immediately adjacent to each other (e.g., having a shared boundary with no guard band separating the UL resources and the DL resources). When the UL resources are FDMed, a guard band between the UL resources and the other UL resources includes a size that is greater than a threshold size (e.g., a threshold size defined by the number of REs or the number of RBs).

At <NUM>, the UE <NUM> may transmit information to the BS <NUM> indicating a capability associated with self-interference cancellation. The information may indicate at least one of one or more different IC techniques or a number of kernels used in the IC.

At <NUM>, the UE <NUM> may receive a configuration from the BS <NUM> for turning on or turning off the self-interference cancellation. The IC may be switched off for power saving purposes or when the bandwidth is too large to apply IC.

At <NUM>, upon receiving a DL communication from the BS <NUM>, the UE <NUM> may cancel self-interference within the DL communication based on the determined level of interference when the self-interference cancelation is configured to be on.

Accordingly, concurrent transmission of UL resources and reception of DL resources allows the UE to measure a level of interference between the DL resources and the UL resources, and report information associated with the determined level of interference to a BS. For example, the UE may report a number of REs or a number of RBs at which the determined level of interference is less than an interference threshold. The information reported to the BS may be indicative of a guard band that is to be incorporated between the UL resources and the DL resources. As such, interferences measurement and reporting is performed by the UE to improve spectral efficiency and reduce interference between the UL resources and the DL resources, such as through implementation of a guard band.

<FIG> is a conceptual data flow diagram <NUM> illustrating the data flow between different means/components in an exemplary apparatus <NUM>. The apparatus may be a UE (e.g., UE <NUM>, <NUM>, 404a, 404b, 404c, 406a, 406b, 406c, <NUM>) in wireless communication with base station <NUM>.

The apparatus includes a transmission component <NUM> that transmits full-duplex uplink communication to the base station <NUM>. The transmission component <NUM> may be configured to transmit various messages to one or more external devices, e.g., including the base station <NUM>, in accordance with the methods disclosed herein. The messages/signals to be transmitted may be generated by one or more other components as discussed above, or the messages/signals to be transmitted may be generated by the transmission component <NUM> under the direction/control of the one or more other components discussed supra. Thus, in various configurations, via the transmission component <NUM>, the apparatus <NUM> and/or one or more components therein transmit signals and/or other information (e.g., such as uplink data, control messages and/or other signals) to external devices such as the base station <NUM>. In some aspects, the transmission component <NUM> is configured to transmit a first signal in UL resources to a first base station, e.g., as described in connection with block <NUM> of <FIG>. The transmission component <NUM> is also configured to transmit information associated with a determined level of interference to the first base station, e.g., as described in connection with block <NUM> of <FIG>. In some aspects, the transmitted information indicates a size of a guard band within the DL resources and immediately adjacent to the UL resources. In some aspects, the transmission component <NUM> may communicate with the first base station through the UL resources and the DL resources excluding the guard band, e.g., as described in connection with block <NUM> of <FIG>. In some aspects, the transmitted first signal comprises sounding reference signals. In some aspects, the UL resources and the DL resources are adjacent to each other. In some aspects, the UL resources and DL resources are immediately adjacent to each other or are separated by a guard band. In some aspects, the UL resources are time division multiplexed with other UL resources associated with other UEs. In some aspects, the UL resources are frequency division multiplexed with other UL resources associated with other UEs, wherein a guard band between the UL resources and the other UL resources has a size greater than a threshold size. In some aspects, the information is transmitted in a report in at least one of a physical uplink control channel or a physical uplink shared channel.

The apparatus includes a reception component <NUM> that receives full-duplex downlink communication from the base station <NUM>. The reception component <NUM> may be configured to receive signals and/or other information from other devices including, e.g., base station <NUM>. The signals/information received by the reception component <NUM> may be provided to one or more components of the apparatus <NUM> for further processing and use in performing various operations in accordance with the methods discussed supra including the process of flowchart <NUM>. Thus, via the reception component <NUM>, the apparatus <NUM> and/or one or more components therein receive signals and/or other information (e.g., such as downlink data for the apparatus <NUM> and/or other control signaling) from the base station <NUM> as discussed supra and also discussed more specifically infra. In some aspects, the reception component <NUM> is configured to receive a second signal in DL resources concurrently with the transmission of the first signal to the first base station, e.g., as described in connection with block <NUM> of <FIG>. In some aspects, the received second signal includes interference associated with the transmitted first signal. In some aspects, the second signal is received from the first base station. In some aspects, the second signal is received from a second base station different from the first base station. In some aspects, the received second signal comprises interference associated with the transmitted SRS. In some aspects, the received second signal comprises channel state information reference signals with interference associated with the transmitted first signal.

The apparatus includes a determination component <NUM> configured to determine a level of the interference received in the second signal that is associated with the transmitted first signal, e.g., as described in connection with block <NUM> of <FIG>. In some aspects, the level of the interference is determined upon at least one of receipt of a request from the first base station, a determination that a reference signal received power of received RS is less than a threshold, or an expiration of a timer.

The apparatus includes an interference threshold component <NUM> configured to determine an interference threshold, e.g., as described in connection with block <NUM> of <FIG>. In some aspects, the transmitted information indicates at least one of a number of resource elements or a number of resource blocks at which the determined level of interference is less than the interference threshold. In some aspects, the interference threshold component <NUM> may receive a configuration of the interference threshold through the reception component <NUM>. The interference threshold component <NUM> may determine the interference threshold based on a UE capability of the UE.

The apparatus may also include a self-interference cancelation component <NUM> configured to receive DL communication from the first base station, through the reception component <NUM>, and cancel self-interference within the DL communication based on the determined level of interference when the self-interference cancelation is configured to be on, e.g., as described in connection with block <NUM> of <FIG>. In some aspects, the self-interference cancelation component <NUM> may receive a configuration from the first base station, through the reception component <NUM>, for turning on or turning off self-interference cancelation, e.g., as described in connection with block <NUM> of <FIG>. The self-interference cancelation component <NUM> may transmit, through the transmission component <NUM>, information to the first base station indicating a capability associated with the self-interference cancelation, e.g., as described in connection with block <NUM> of <FIG>. In some aspects, the information indicates at least one of one or more different interference cancelation techniques or a number of kernels used in interference cancelation.

In some aspects, the reception component <NUM> may receive a third signal in second DL resources concurrently with the transmission of the first signal to the first base station. In some aspects, the received third signal includes second interference associated with the transmitted first signal. In some aspects, the UL resources being between the DL resources and the second DL resources. In some aspects, the determination component <NUM> may determine a second level of the second interference received in the third signal that is associated with the transmitted first signal. In some aspects, the transmission component <NUM> may transmit second information associated with the determined second level of the second interference to the first base station.

In some aspects, the interference threshold component <NUM>, in conjunction with the determination component <NUM>, may determine the at least one of the number of REs or the number of RBs for a guard band between the UL resources and the DL resources where the determined level of interference due to the transmitted first signal within the DL resources immediately adjacent to the guard band is less than the interference threshold, e.g., as described in connection with block <NUM> of <FIG>. In some aspects, the transmitted information is associated with the at least one of the number of REs or the number of RBs defining a size of the guard band.

<FIG> is a diagram <NUM> illustrating an example of a hardware implementation for an apparatus <NUM>' employing a processing system <NUM>. The processing system <NUM> may be implemented with a bus architecture, represented generally by the bus <NUM>. The bus <NUM> may include any number of interconnecting buses and bridges depending on the specific application of the processing system <NUM> and the overall design constraints. The bus <NUM> links together various circuits including one or more processors and/or hardware components, represented by the processor <NUM>, the components <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, and the computer-readable medium / memory <NUM>. The bus <NUM> may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.

The processing system <NUM> may be coupled to a transceiver <NUM>. The transceiver <NUM> is coupled to one or more antennas <NUM>. The transceiver <NUM> provides a means for communicating with various other apparatus over a transmission medium. The transceiver <NUM> receives a signal from the one or more antennas <NUM>, extracts information from the received signal, and provides the extracted information to the processing system <NUM>, specifically the reception component <NUM>. In addition, the transceiver <NUM> receives information from the processing system <NUM>, specifically the transmission component <NUM>, and based on the received information, generates a signal to be applied to the one or more antennas <NUM>. The processing system <NUM> includes a processor <NUM> coupled to a computer-readable medium / memory <NUM>. The processor <NUM> is responsible for general processing, including the execution of software stored on the computer-readable medium / memory <NUM>. The software, when executed by the processor <NUM>, causes the processing system <NUM> to perform the various functions described supra for any particular apparatus. The computer-readable medium / memory <NUM> may also be used for storing data that is manipulated by the processor <NUM> when executing software. The processing system <NUM> further includes at least one of the components <NUM>, <NUM>, <NUM>, <NUM>, <NUM>. The components may be software components running in the processor <NUM>, resident/stored in the computer readable medium / memory <NUM>, one or more hardware components coupled to the processor <NUM>, or some combination thereof. The processing system <NUM> may be a component of the UE <NUM> and may include the memory <NUM> and/or at least one of the TX processor <NUM>, the RX processor <NUM>, and the controller/processor <NUM>.

Claim 1:
A method (<NUM>) of wireless communication of a wireless device for a user equipment, UE, (<NUM>, <NUM>, 404a, 404b,404c, 406a, 406b, 406c, <NUM>, <NUM>, <NUM>) comprising:
transmitting (<NUM>) a first signal in uplink, UL, resources (<NUM>) to a first base station (<NUM>, <NUM>, 402a, 402b, 402c, 408a, 408b, 408c, <NUM>, <NUM>, <NUM>);
receiving (<NUM>) a second signal in downlink, DL, resources (610a, 610b) concurrently with the transmission of the first signal to the first base station, the received second signal including interference associated with the transmitted first signal;
determining (<NUM>) a level of the interference received in the second signal that is associated with the transmitted first signal (<NUM>), characterized in that determining the level of interference comprises determining an interference threshold; and
transmitting (<NUM>) information associated with the level of the interference to the first base station (<NUM>), wherein the transmitted information indicates at least one of a number of resource elements, REs, or a number of resource blocks, RBs, at which the level of interference is less than the interference threshold.