A first radio access technology (RAT) channel state feedback (CSF) to increase accuracy of interference estimates from second RAT neighbor cells by dynamic spectrum sharing (DSS)

Abstract

A user equipment (UE) receives, from a base station, a message including at least one reporting configuration and resource configuration for a number of channel state information-interference measurement (CSI-IM) resource patterns associated with a first radio access technology (RAT). Each of the configured CSI-IM resource patterns corresponds to a time and frequency location in a resource block of a neighbor cell associated with a second RAT. The UE transmits one or more CSI reports based on the reporting configuration(s) and resource configuration(s).

Description

[0001] Cross Reference to Related Applications

[0002] This application claims priority to U.S. Patent Application No. 17 / 394,221, filed August 4, 2021, entitled “FIRST RADIO ACCESS TECHNOLOGY (RAT) CHANNEL STATE FEEDBACK (CSF) TO INCREASE ACCURACY OF INTERFERENCE ESTIMATES FROM SECOND RAT NEIGHBOR CELLS WITH DYNAMIC SPECTRUM SHARING (DSS),” which claims the benefit of U.S. Provisional Patent Application No. 63 / 065,370, filed August 13, 2020, entitled “5G NEW RADIO (NR) CHANNEL STATE FEEDBACK (CSF) TO INCREASE ACCURACY OF INTERFERENCE ESTIMATES FROM LONG-TERM EVOLUTION (LTE) NEIGHBOR CELLS WITH DYNAMIC SPECTRUM SHARING (DSS),” the disclosures of which are expressly incorporated by reference herein in their entirety.

[0003] Field of the Disclosure

[0004] Aspects of the present disclosure relate generally to wireless communication, and more specifically to techniques and apparatuses for increasing accuracy of interference estimates from second radio access technology (RAT) (e.g., long term evolution (LTE)) neighbor cells with dynamic spectrum sharing (DSS) using first RAT (e.g., 5G new radio (NR)) channel state feedback (CSF). BACKGROUND

[0005] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems can employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3 GPP). Narrowband (NB) Internet of Things (IoT) and enhanced machine-type communication (eMTC) are sets of enhancements to LTE for machine type communications.

[0006] A wireless communication network can include a number of base stations (BSs) that can support communication for a number of user equipment (UEs). A user equipment (UE) can communicate with a base station (BS) via the downlink and uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail, a BS can be referred to as a Node B, an evolved Node B (eNB), a gNB, an access point (AP), a radio head, a transmit receive point (TRP), a New Radio (NR) BS, a 5G Node B, and / or the like.

[0007] The above multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different wireless communication devices to communicate on a municipal, national, regional, and even global level. New Radio (NR), which can also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP- OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0008] SUMMARY

[0009] According to aspects of the present disclosure, a method of wireless communication by a user equipment (UE) includes receiving, from a base station, a message including at least one reporting configuration and resource configuration for a number of channel state information-interference measurement (CSI-IM) resource patterns associated with a first radio access technology (RAT). Each of the CSI-IM resource patterns corresponds to a time and frequency location in a resource block of a neighbor cell associated with a second RAT. The method also transmits one or more CSI reports based on the reporting configuration(s) and the resource configuration(s).

[0010] In other aspects of the present disclosure, a method of wireless communication by a base station associated with a first radio access technology (RAT) includes configuring one or more reporting configurations and resource configurations for a number of CSI-IM resource patterns associated with the first RAT. Each of the CSI-IM resource patterns corresponds to a time and frequency location in a resource block of a neighbor cell associated with a second RAT. The method also transmits, to a UE, a message indicating the reporting configuration(s) and the resource configuration(s). The method further receives one or more CSI reports from the UE based on the transmitted message.

[0011] In other aspects of the present disclosure, an apparatus for wireless communication at a UE includes a processor and a memory coupled with the processor. Instructions stored in the memory are executable by the processor to cause the apparatus to receive, from a base station, a message including at least one reporting configuration and resource configuration for a number of channel state information-interference measurement (CSI-IM) resource patterns associated with a first radio access technology (RAT). Each of the CSI-IM resource patterns corresponds to a time and frequency location in a resource block of a neighbor cell associated with a second RAT. The apparatus also transmits one or more CSI reports based on the reporting configuration(s) and the resource configuration(s).

[0012] In yet other aspects of the present disclosure, an apparatus for wireless communication at a base station associated with a first radio access technology (RAT) includes a processor and a memory coupled with the processor. Instructions stored in the memory are executable by the processor to cause the apparatus to configure one or more reporting configurations and resource configurations for a number of CSI-IM resource patterns associated with the first RAT. Each of the number of CSI-IM resource patterns corresponds to a time and frequency location in a resource block of a neighbor cell associated with a second RAT. The apparatus also transmits, to a UE, a message including the reporting configuration(s) and the resource configuration(s). The apparatus further receives one or more CSI reports from the UE based on the transmitted message.

[0013] In some other aspects of the disclosure, a UE for wireless communication includes means for receiving, from a base station, a message indicating at least one reporting configuration and resource configuration for a number of channel state information-interference measurement (CSI-IM) resource patterns associated with a first radio access technology (RAT). Each of the CSI-IM resource patterns corresponds to a time and frequency location in a resource block of a neighbor cell associated with a second RAT. The UE also includes means for transmitting one or more CSI reports based on the reporting configuration(s) and the resource configuration(s).

[0014] In other aspects of the disclosure, a base station associated with a first radio access technology (RAT) for wireless communication includes means for configuring at least one reporting configuration and resource configuration for a number of CSI-IM resource patterns associated with the first RAT. Each of the CSI-IM resource patterns corresponds to a time and frequency location in a resource block of a neighbor cell associated with a second RAT. The base station also includes means for transmitting, to a UE, a message indicating the reporting configuration(s) and the resource configuration(s). The base station further includes means for receiving, from the UE, one or more CSI reports based on the transmitted message.

[0015] In aspects of the disclosure, a non-transitory computer-readable medium having program code recorded thereon is disclosed. The program code is executed by a UE and includes program code to receive, from a base station, a message including at least one reporting configuration and resource configuration for a number of channel state information-interference measurement (CSI-IM) resource patterns associated with a first radio access technology (RAT). Each of the CSI-IM resource patterns corresponds to a time and frequency location in a resource block of a neighbor cell associated with a second RAT. The UE also includes program code to transmit one or more CSI reports based on the reporting configuration(s) and the resource configuration(s).

[0016] In other aspects of the disclosure, a non-transitory computer-readable medium having program code recorded thereon is disclosed. The program code is executed by a base station associated with a first radio access technology (RAT) and includes program code to configure at least one reporting configuration and resource configuration for a number of CSI-IM resource patterns associated with the first RAT. Each of the CSI-IM resource patterns corresponds to a time and frequency location in a resource block of a neighbor cell associated with a second RAT. The base station also includes program code to transmit, to a UE, a message indicating the reporting configuration(s) and the resource configuration(s). The base station further includes program code to receive, from the UE, one or more CSI reports based on the transmitted message. BRIEF DESCRIPTION OF DRAWINGS

[0018] For a more complete understanding of the features of the present disclosure, reference is made to the detailed description taken in conjunction with the accompanying drawings in which various aspects are shown by way of illustration. It should be noted that the drawings are not necessarily drawn to scale and that the descriptions and drawings should not be construed as limiting the scope of the disclosure. Like reference numbers in different drawings can identify the same or similar elements.

[0019] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network, in accordance with various aspects of the present disclosure.

[0020] Figure 2 is a block diagram conceptually illustrating an example of a base station in communication with a user equipment (UE) in a wireless communication network, in accordance with various aspects of the present disclosure.

[0021] Figure 3A is a diagram illustrating an example of a downlink (DL) frame structure in a wireless communication system, such as an LTE communication system.

[0022] Figure 3B is a diagram illustrating an example of a power ratio between reference signals and shared data channel signals in subcarriers of a subframe.

[0023] Figure 4 is a diagram illustrating an example of a four-port cell reference signal (CRS) pattern for a subframe.

[0024] Figure 5A is a diagram illustrating an example of a first channel state information interference measurement (CSI-IM) resource pattern.

[0025] Figure 5B is a diagram illustrating an example of a second CSI-IM resource pattern.

[0026] Figure 6A An example of placing a CSI-IM resource pattern in symbol 4 of a resource block, in accordance with aspects of the present disclosure, is illustrated.

[0027] Figure 6B An example of placing a CSI-IM resource pattern in symbol 0 of slot 1 of a resource block, in accordance with aspects of the present disclosure, is illustrated.

[0028] Figure 6C An example of placing a CSI-IM resource pattern in a physical downlink shared channel (PDSCH) symbol of a resource block belonging to a second RAT, in accordance with aspects of the present disclosure, is illustrated.

[0029] Figure 7 is a flow diagram illustrating an example process performed, for example, by a UE, in accordance with various aspects of the present disclosure.

[0030] Figure 8 FIG. 8 is a flowchart illustrating an example process performed, for example, by a base station, in accordance with various aspects of the present disclosure.

[0031] DETAILED DESCRIPTION

[0032] Various aspects of the disclosure are described more fully below. However, the disclosure may

[0033] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends on the particular application and design constraints imposed on the overall system.

[0034] It should be noted that while aspects can be described using terminology commonly associated with 5G and later wireless technologies, aspects of the present disclosure can be applied in other generation-based communications systems, such as those commonly associated with 3G and / or 4G technologies.

[0035] Dynamic spectrum sharing (DSS) can be enabled in some wireless systems. In these systems, an operator can use the same spectrum band for different radio access technologies (RATs). For example, long term evolution (LTE) and new radio (NR) systems can use the same spectrum band. In systems where DSS is enabled, a cell-specific reference signal (CRS) from a neighbor LTE cell can interfere with data messages transmitted on an NR physical downlink shared channel (PDSCH). The interference can occur when a frequency shift parameter (vShift) of a neighbor cell of a RAT (e.g., LTE) is different from a vShift of a serving cell of the RAT. The vShift defines a frequency shift pattern for CRS resource elements (REs). That is, due to the different vShift, the CRS REs of the neighbor cell do not collide with the CRS REs of the serving cell.

[0036] When DSS is enabled, a NR UE can report a high rank and / or a high channel quality indicator (CQI). The high rank and / or CQI can be reported even when the NR UE is subject to CRS interference. In some cases, a network configures channel state information interference measurement (CSI-IM) to detect LTE PDSCH interference symbols instead of LTE CRS symbols. Thus, the interference estimate can not accurately reflect the impact of the CRS of a neighboring cell. The impact of LTE CRS interference can be more prevalent in cell edge conditions.

[0037] Aspects of the present disclosure relate to measuring LTE CRS to identify CRS interference. In some configurations, a base station configures a set of CSI-IM resources for a UE associated with a first radio access technology (RAT), such as NR. Each CSI-IM resource can be associated with a time and frequency location in a slot to overlap with one or more CRS resource elements of a neighbor cell associated with a second RAT, such as LTE. The base station can activate one or more CSI-IM and / or request one or more CSI reports based on a neighbor cell measurement report. The neighbor cell measurement report provides information about neighbor cell signal strength. The CSI report carries information about channel estimation and interference estimation. The network can request the UE to report a particular CSI report based on the signal strength measurement of the neighbor cell.

[0038] Figure 1is a diagram illustrating a network 100 in which aspects of the disclosure can be practiced. The network 100 can be a 5G or NR network or some other wireless network, such as an LTE network. Wireless network 100 can include a number of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 1 lOd) and other network entities. A BS is an entity that communicates with user equipment (UEs) and can also be referred to as a base station, a NR BS, a NodeB, a gNB, a 5G NB (NB), an access point, a transmit receive point (TRP), and / or the like. Each BS can provide communication coverage for a particular geographic area. In 3GPP, the term “cell” can refer to a coverage area of a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0039] BSs can be macro BSs, pico BSs, femto BSs, and / or other types of BSs. A macro BS can cover a relatively large geographic area (e.g., 100s of feet to 10s of kilometers in radius) and can allow unrestricted access to users with service subscriptions. A pico BS can cover a relatively small geographic area (e.g., a home) and can allow restricted access to users with service subscriptions. A femto BS can cover a relatively small geographic area (e.g., a home) and can allow restricted access to users with service subscriptions. Figure 1 In the example shown in FIG. 1, BS 110a can be a macro BS for a macro cell 102a, BS 110b can be a pico BS for a pico cell 102b, and BS 110c can be a femto BS for a femto cell 102c. A BS can support one or multiple (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “Node B,” “5G NB,” and “cell” can be used interchangeably.

[0040] In some aspects, a cell can not necessarily be stationary, and the geographic area of the cell can move according to the location of a mobile BS. In some aspects, BSs can be interconnected to one another and / or to one or more other BSs or network nodes (not shown) in wireless network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, or the like using any suitable transport network.

[0041] Wireless network 100 can also include relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS). A relay station can also be a UE that can relay transmissions for other UEs. In Figure 1 In the example shown in FIG. 1, relay station 1 lOd can communicate with macro BS 110a and UE 120d in furtherance of communication between BS 110a and UE 120d. A relay station can also be referred to as a relay BS, a relay base station, a relay, and / or the like.

[0042] Wireless network 100 can be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and / or the like. These different types of BSs can have different transmit power levels, different coverage areas, and different impacts on interference. For example, macro BSs can have a high transmit power level (e.g., 5 to 40 Watts) whereas pico BSs, femto BSs, and relay BSs can have lower transmit power levels (e.g., 0.1 to 2 Watts).

[0043] By way of example, the BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 1 lOd) and the core network 130 can exchange communication via backhaul links 132 (e.g., SI, etc.). The base stations 110 can also communicate with one another, e.g., directly or indirectly (e.g., through core network 130) on other backhaul links (e.g., X2, etc.). UEs 120 (e.g., 120a, 120b, 120c) can

[0044] The core network 130 can be an evolved packet core (EPC), which can include at least one mobility management entity (MME), at least one serving gateway (S-GW), and at least one Packet Data Network (PDN) gateway (P-GW). The MME can be the control node that processes the signaling between the UEs 120 and the EPC. All user IP packets can be transferred through the S-GW, which itself can be connected to the P-GW. The P-GW can provide IP address allocation as well as other functions. The P-GW can be connected to the operator's IP services. The operator's IP services can include the Internet, an intranet, an IP Multimedia Subsystem (IMS), and a Packet-Switched (PS) Streaming Service.

[0045] The core network 130 can provide user authentication, access authorization, tracking, IP connectivity, and other access, routing, or mobility functions. One or more of the base stations 110 or access node controllers (ANC) can interface with the core network 130 through backhaul links 132 (e.g., SI, S2, etc.) and can perform radio

[0046] The UEs 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. A UE can also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, etc. A UE can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, an

[0047] One or more UEs 120 can establish a protocol data unit (PDU) session for a network slice. In some cases, a UE 120 can select a network slice based on an application or a subscription service. By having different network slices serve different applications or subscriptions, a UE 120 can improve its resource utilization in the wireless communication system 100 while also meeting performance specifications of individual applications of the UE 120. In some cases, a network slice used by a UE 120 can be served by an AMF (not shown in FIG. 1) associated with one or both of a base station 110 or a core network 130. Further, session management for a network slice can be performed by an access and mobility management function (AMF). Figure 1

[0048] ​The UEs 120 can include a channel state information interference measurement (CSI-IM) measurement module 140. Only one UE 120d is shown including the CSI-IM measurement module 140 for brevity. The CSI-IM measurement module 140 can receive, from a base station, a message including at least one reporting configuration and resource configuration for a number of CSI-IM resource patterns associated with a first radio access technology (RAT). Each CSI-IM resource pattern can correspond to a time and frequency location in a resource block of a neighbor cell associated with a second RAT. The CSI-IM measurement module 140 can also transmit one or more CSI reports based on the reporting configuration(s) and resource configuration(s).

[0049] The core network 130 or base stations 110 can include a CSI-IM measurement configuration module 138 for configuring at least one reporting configuration and resource configuration for a number of CSI-IM resource patterns associated with a first RAT. Each of the number of CSI-IM resource patterns corresponds to a time and frequency location in a resource block of a neighbor cell associated with a second RAT. The CSI-IM measurement configuration module 138 also transmits a message to a UE indicating the reporting configuration(s) and resource configuration(s). The CSI-IM measurement configuration module 138 can also receive one or more CSI reports from the UE based on the transmitted message.

[0050] Some UEs can be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., that can communicate with a base station, another device (e.g., remote device), or some other entity. A wireless node can provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link. Some UEs can be considered Internet-of-Things (IoT) devices, and / or can be implemented as NB-IoT (narrowband internet of things) devices. Some UEs can be considered customer premises equipment (CPE). A UE 120 can be included in a housing that houses components of the UE 120, such as processor components, memory components, and / or the like.

[0051] In general, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a particular radio access technology (RAT) and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, an air interface, etc. A frequency can also be referred to as a carrier, a frequency channel, etc. Each frequency can support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0052] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) can communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with each other). For example, UE 120 can perform scheduling operations, resource selection operations, and / or other operations described elsewhere as being performed by the base station 110. For example, the base station 110 can configure the UE 120 via downlink control information (DCI), radio resource control (RRC) signaling, a medium access control- control element (MAC-CE), or via system information (e.g., a system information block (SIB)).

[0053] As indicated above, Figure 1 are provided merely by way of example. Other examples can differ from what is described. Figure 1 without departing from the description.

[0054] Figure 2 A block diagram of a design 200 of a base station 110 and a UE 120 is shown, which can be one of the base stations and one of the UEs in Figure 1 FIG. 1. The base station 110 can be equipped with T antennas 234a through 234t, and the UE 120 can be equipped with R antennas 252a through 252r, where in general T > 1 and R > 1.

[0055] At base station 110, a transmit processor 220 can receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCSs) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS(s) selected for the UE, and provide data symbols for all UEs. Reducing the MCSs can reduce throughput, but can increase reliability of transmissions. Transmit processor 220 can also process system information (e.g., for semi-static resource partitioning information (SRPI), and / or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and / or the like), and provide overhead symbols and control symbols. Transmit processor 220 can also generate reference symbols for reference signals (e.g., the cell-specific reference signal (CRS)) and synchronization signals (e.g., the primary synchronization signal (PSS) and secondary synchronization signal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on the data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and can provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 can process a respective output symbol stream (e.g., for OFDM and / or the like) to obtain an output sample stream. Each modulator 232 can further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a through 232t can be transmitted via T antennas 234a through 234t, respectively. According to various aspects described in more detail below, location encoding can be utilized to generate synchronization signals to convey additional information.

[0056] At the UE 120, the antennas 252a through 252r can receive the downlink signals from the base station 110 and / or other base stations and can provide received signals to the demodulators (DEMODs) 254a through 254r, respectively. Each demodulator 254 can condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples. Each demodulator 254 can further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 can obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The channel processor can determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 can be included in a housing.

[0057] On the uplink, at the UE 120, a transmit processor 264 can receive and process data from a data source 262 and control information (e.g., for reports comprising RSRP, RSSI, RSRQ, CQI, etc.) from the controller / processor 280. Transmit processor 264 can also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 can be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, the uplink signals from UE 120 and other UEs can be received by the antennas 234, processed by demodulators 254, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120. The receive processor 238 can provide the decoded data to a data sink 239 and the decoded control information to a controller / processor 240. The base station 110 can include a communication unit 244 and communicate to the core network 130 via the communication unit 244. The core network 130 can include a communication unit 294, a controller / processor 290, and a memory 292.

[0058] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other components of the base station 110 and / or UE 120, among other examples, can perform, or direct the operation of processes, such as the processes described above and / or other processes as described. Memory 242 and 282, among other examples, can store data and program codes for the base station 110 and UE 120, respectively. Scheduler 246 can schedule UEs for data transmission on the downlink and / or uplink. Figure 2 Any other components of the base station 110 and / or UE 120, among other examples, can perform, or direct the operation of processes, such as the processes described above and / or other processes as described. Memory 242 and 282, among other examples, can store data and program codes for the base station 110 and UE 120, respectively. Scheduler 246 can schedule UEs for data transmission on the downlink and / or uplink. Figures 7-8 Any other components of the base station 110 and / or UE 120, among other examples, can perform, or direct the operation of processes, such as the processes described above and / or other processes as described. Memory 242 and 282, among other examples, can store data and program codes for the base station 110 and UE 120, respectively. Scheduler 246 can schedule UEs for data transmission on the downlink and / or uplink.

[0059] In some aspects, the UE 120 can include means for receiving, means for measuring, and / or means for transmitting. In some aspects, the base station 110 can include means for configuring, means for transmitting, means for receiving, means for selecting, and / or means for scheduling. Such means can include one or more components of the UE 120 or base station 110 described in connection with Figure 2

[0060] As indicated above, this description has been presented for the purpose of readability and Figure 2 are provided by way of example only. Other examples can differ from what is described. Figure 2

[0061] Dynamic spectrum sharing (DSS) can be enabled in some wireless systems. In these systems, an operator can use the same spectrum band for different radio access technologies (RATs). For example, a long term evolution (LTE) and NR system can use the same spectrum band. In systems where DSS is enabled, a cell-specific reference signal (CRS) from a neighbor cell (e.g., an LTE neighbor cell) can interfere with data messages transmitted on an NR physical downlink shared channel (PDSCH). The interference can occur when a frequency shift parameter (vShift) of the neighbor cell is different from the vShift of a serving cell (e.g., an LTE serving cell). That is, the CRS of the neighbor cell does not collide with the CRS of the serving cell.

[0062] When DSS is enabled, NR UEs can report a high rank and / or a high channel quality indicator (CQI) even when the NR UEs are subject to CRS interference. In some cases, a network configures channel state information interference measurement (CSI-IM) to detect LTE PDSCH interference symbols instead of LTE CRS symbols. Thus, the interference estimate can not accurately reflect the impact of the CRS of a neighboring cell. The impact of LTE CRS interference can be more prevalent in cell edge conditions. ​​

[0063] According to aspects of the present disclosure, a network (e.g., an NR base station) can align one or more NR CSI-IM resources with LTE CRS resource elements (REs). The NR CSI-IM resources can be from a serving cell, and the LTE CRS REs can be from one or more neighbor cells. As described, the vShift of the serving cell is different from the vShift of the neighbor cells. According to aspects of the present disclosure, the network can activate or deactivate the CSI-IM resources and / or measurement reports (e.g., CSI reports) based on neighbor cell measurement reports, such as signal strength measurements.

[0064] Figure 3A is a diagram 300 illustrating an example of a downlink (DL) frame structure in a wireless communication system, such as an LTE communication system. A frame (10 ms) can be divided into ten equally sized subframes. Each subframe can include two consecutive time slots. A resource grid can represent the two time slots, with each time slot including resource blocks that are divided into resource elements. In LTE, a resource block contains twelve consecutive subcarriers in the frequency domain and, for a normal cyclic prefix, seven consecutive OFDM symbols in the time domain, or 84 resource elements. For an extended cyclic prefix, a resource block contains six consecutive OFDM symbols in the time domain and has 72 resource elements. Some of the resource elements, shown as 'R' 302, 304, include DL reference signals (DL-RS). The DL-RS can include a cell-specific RS (CRS) 302 and a UE-specific RS (UE-RS) 304. In LTE, a UE can receive the DL-RS on the assigned resource elements 302, 304 in the Figure 3A In an example, for symbols allocated to data, the resource elements that do not include a reference signal 302, 304 can be allocated to a data channel (e.g., PDSCH). The number of bits carried by each resource element depends on the modulation scheme.

[0065] As Figure 3AAs shown, resource elements of some symbols (such as symbol 3 in slot 0) can map to reference signals (such as CRS) and data channels (e.g., PDSCH). Additionally, resource elements of other symbols (such as symbol 5 of slot 0) can map to only data channels (e.g., PDSCH). In wireless communication systems, such as LTE and NR, a UE determines a ratio of the transmit power of PDSCH to the transmit power of CRS. In some cases, the transmit power of CRS can be greater than the transmit power of data channels. Additionally, the transmit power of data channels can be different based on whether the data channel is mapped to a symbol that includes CRS or a symbol that does not include CRS. PDSCH can be demodulated based on the PDSCH / CRS power ratio. The UE can determine the PDSCH / CRS power ratio via higher layer signaling. The power allocated to CRS REs is controlled relative to PDSCH via a parameter A and B .

[0066] Figure 3B is a diagram illustrating an example of a power ratio between reference signals and shared data channel signals in subcarriers, such as subcarrier 11, of a subframe. Figure 3B is shown for illustrative purposes, mapping of CRS and PDSCH is different than Figure 3A . As shown in the example of Figure 3B , PDSCH resource elements can be allocated to a set of symbols 314 that do not have reference signals (e.g., CRS). Additionally, in the example of Figure 3B , for subcarriers, symbol 0 of slot 1 includes PDSCH resource elements 316 allocated to symbols with CRS. Furthermore, in the current example, for subcarriers, resource elements in symbol 4 of slots 0 and 1 are allocated to CRS 318. Finally, symbol 1 of slot 0 maps to a physical downlink control channel (PDCCH) 312. As shown in Figure 3B , a power ratio between the power allocated to PDSCH resource elements from the set of symbols 314 that do not have CRS and the power allocated to CRS resource elements 318 is A . A parameter B is a power ratio between the power allocated to PDSCH resource elements 316 allocated to symbols with CRS and the power allocated to PDSCH resource elements from the set of symbols 314 that do not have CRS resource elements.

[0067] The network can control the power ratio between PDSCH and CRS by adjusting the parameters A and Bto provide stable power across symbols of a subframe. As described, NR transmissions can be subject to interference from LTE CRS resources. In some cases, NR channel state feedback (CSF) interference measurements are based on power measurements from four resource elements.

[0068] In some cases, CRS can be transmitted via multiple antenna ports of a base station. For example, a base station can use a four-port CRS pattern, where a different CRS pattern is assigned to each port. Figure 4 is a diagram illustrating an example of a four-port CRS pattern for a subframe. As shown in Figure 4 As shown in the middle, CRS transmissions for CRS ports 0 and 1 are defined to be transmitted on the same OFDM symbol. Additionally, CRS transmissions for CRS ports 2 and 3 are transmitted on the same OFDM symbol (different from the OFDM symbol containing CRS ports 0 and 1). In some examples, in a four-antenna system, antenna 1 is mapped to port 0, antenna 2 is mapped to port 1, and so on.

[0069] NR systems can use channel state information interference measurement (CSI-IM) resources to measure interference. Radio resource control (RRC) signaling can configure a first CSI-IM resource pattern (e.g., pattern 0) or a second CSI-IM resource pattern (e.g., pattern 1). Figure 5A is a diagram illustrating an example of a first CSI-IM resource pattern 500. As shown in Figure 5A As shown in the middle, the first CSI-IM resource pattern 500 overlaps with two resource elements in one symbol of a resource block and two resource elements in an adjacent symbol of the resource block. The first CSI-IM resource pattern 500 can capture one or two resource elements in a resource block with CRS interference from a neighbor cell. The number of captured resource elements can depend on the number of CRS ports and the location of the CSI-IM (e.g., time and frequency location). In some configurations, the network configures the location of the CSI-IM such that the CSI-IM does not capture CRS power of a serving cell of a neighbor RAT, such as an LTE serving cell.

[0070] Figure 5B is a diagram illustrating an example of a second CSI-IM resource pattern 550. As shown in Figure 5BAs shown, the second CSI-IM resource mode 550 overlaps with four resource elements in one symbol of a resource block. The second CSI-IM resource mode 550 can capture the CRS power of a multi-port CRS used by the serving cell. Therefore, when the serving cell has more than one LTE CRS port, the second CSI-IM resource mode 550 may not provide accurate CRS power measurements of neighboring cells. That is, the second CSI-IM resource mode 550 may be useful when neighboring cells have non-colliding CRS and the serving cell has one LTE CRS port.

[0071] According to various aspects of this disclosure, the network can be configured with a Channel State Information Interference Measurement (CSI-IM) resource set associated with a first Radio Access Technology (RAT) (such as NR). Each CSI-IM resource from the CSI-IM resource set corresponds to a resource block or a time and frequency location within a time slot of that resource block, such that each CSI-IM resource overlaps with one or more cell-specific Reference Signals (CRS) associated with a neighboring cell of a second RAT (such as LTE). The UE can transmit measurement reports based on the configured CSI-IM resource set.

[0072] Measurement reports may include interference measurements, which include total interference power measured via configured CSI-IM resources (e.g., CSI-IM resource modes). For ease of explanation, the following examples assume interference from neighboring cells with a four-port CRS and that the downlink shared channel (e.g., PDSCH) has flat fading, although this disclosure is not limited thereto. As described in the following examples, the measured total interference power may vary based on the location of the CSI-IM resource mode and the downlink power allocation settings of the neighboring cells.

[0073] Figure 6A An example of placing CSI-IM resource pattern 600 in codeword four of a resource block, according to various aspects of this disclosure, is explained. Figure 6A In the example, network activation is configured for a four-port CRS configuration (such as reference). Figure 4 The described configuration) is located in the CSI-IM resource mode 600 of the resource block code four of the neighboring cell. (As in...) Figure 6A As shown, CSI-IM resource pattern 600 and a CRS resource element (RE) 602 (P) CRS (where P) CRS Represents the energy power per resource element (EPRE) of the CRS frequency modulation, and a PDSCH RE 604 in the CRS symbol. (in This indicates that the PDSCH frequency modulation of CRS exists in their symbols (EPRE), and two PDSCH RE606 (P PDSCH (where P) PDSCH This indicates the overlap of the PDSCH frequency modulation (EPRE) in the symbol with CRS RE. In this example, the total interference power measured by CSI-IM resource mode 600 is the total interference power of the RE aligned with CSI-IM resource mode 600. The interference power of the PDSCH RE in the CRS symbol. It can be the power ratio (ρ) B The product of the interference power of the CRS resource element and the interference power of the CRS resource element (ρ) B *P CRS Additionally, the interference power (P) of the PDSCH RE in the PDSCH symbol. PDSCH ) can be the power ratio (P) A The product of the interference power of the CRS resource element and the interference power of the CRS resource element (ρ) A *P CRS ).exist Figure 6A In the example, the total interference power can be determined as follows:

[0074]

[0075] Figure 6B An example of placing the CSI-IM resource pattern 620 in symbol 0 of slot 1 of a resource block, according to various aspects of this disclosure, is explained. Figure 6B In the example, network activation is configured for a four-port CRS configuration (such as reference). Figure 4 The CSI-IM resource mode 620 is located in the code 0 of slot 1 of the resource block of the neighboring cell (as described in the configuration). Figure 6B As shown, CSI-IM resource mode 620 and the two CRS RE 602(P) symbols in the CRS code are... CRS ) and two PDSCHRE 604 Overlap. In this example, the total interference power measured by CSI-IM resource mode 620 is the total interference power of the REs aligned with CSI-IM resource mode 620. Figure 6B In the example, the total interference power can be determined as follows:

[0076]

[0077] Figure 6C An example of placing the CSI-IM resource pattern 650 within the PDSCH symbol of a resource block belonging to the second RAT, according to various aspects of this disclosure, is explained. Figure 6C In the example, network activation is configured for a four-port CRS configuration (such as reference).Figure 4 CSI-IM resource pattern 650. As shown in FIG. 6C, the CSI-IM resource pattern 650 aligns with four PDSCH REs 606 (P Figure 6C PDSCH ) in a symbol of a PDSCH of a resource block of a neighbor cell of the described configuration. In the example of FIG. 6C, the CSI-IM resource pattern 650 aligns with four PDSCH REs 606 (P Figure 6C In the example of FIG. 6C, the total interference power can be determined as follows:

[0078]

[0079] Aspects of the disclosure are not limited to configuring CSI-IM in the locations shown in FIG. 6C. Different locations within a resource block can be configured. Figures 6A-6C

[0080] According to aspects of the disclosure, a base station configures at least one reporting configuration and resource configuration for a plurality of channel state information interference measurement (CSI-IM) resource patterns associated with a first radio access technology (RAT), such as NR. The plurality of CSI-IM resource patterns can be patterns such as the CSI-IM resource patterns 600, 620, 650 described with reference to Figure 6A , 6B and 6C. In these configurations, each configured CSI-IM resource pattern corresponds to a time and frequency location in a resource block of a neighbor cell associated with a second RAT, such as LTE. The base station can transmit a message to a UE indicating the reporting configuration(s) and resource configuration(s). In some configurations, the base station can indicate multiple reporting configurations and resource configurations to the UE.

[0081] The reporting configuration configures a reporting periodicity for one or more measurement reports. Each measurement report can correspond to one or more CSI-IM resource patterns of the configured CSI-IM resource patterns. Additionally, each measurement report includes an interference measurement based on a total interference power of a set of resource elements (REs) of a resource block aligned with the time and frequency location of each CSI-IM resource pattern corresponding to the measurement report. As described above, the set of REs includes one or more of: a cell-specific reference signal (CRS) RE of one or more neighbor cells, a physical downlink shared channel (PDSCH) RE in a symbol including the CRS RE of the one or more neighbor cells, or a PDSCH RE in a symbol not including the CRS RE of the one or more neighbor cells.

[0082] ​​In some configurations, the reporting configuration is periodic. In these configurations, the base station configures the UE to measure REs aligned with each CSI-IM resource pattern in the configured CSI-IM resource patterns. Additionally, the UE transmits each configured measurement report corresponding to one or more CSI-IM resource patterns. The base station can select or prioritize one or more received measurement reports based on neighbor cell measurements (such as signal strength measurements) reported by the UE. Additionally, the base station schedules future UE communications based on interference measurements of the one or more selected measurement reports (e.g., CSI reports).

[0083] In other configurations, the base station schedules the UE for semi-persistent reporting. In these configurations, the base station can activate or deactivate one or more CSI-IM resource patterns and corresponding measurement reports based on neighbor cell measurement reports (e.g., signal strength measurements) transmitted by the UE. That is, the UE can receive a signal to activate (e.g., trigger) a set of measurement reports and a set of CSI-IM resource patterns corresponding to the set of measurement reports. The set of measurement reports can include one or more measurement reports. The set of CSI-IM resource patterns can include one or more CSI-IM resource patterns. For a selected CSI-IM resource pattern(s) in the set of CSI-IM resource patterns, the UE can measure a total interference power of a set of REs aligned in time and frequency location with the selected CSI-IM resource pattern(s). The UE can report the set of measurement reports to the base station.

[0084] In yet other configurations, the base station schedules the UE for aperiodic reporting. As described above, the UE can be configured with a number of CSI-IM resources, where each CSI-IM resource is designated for a frequency domain and time domain (e.g., symbol) location. In these configurations, the base station triggers the UE to measure a set of CSI-IM resources and report one or more corresponding measurement reports based on neighbor cell measurement reports transmitted by the UE.

[0085] As indicated above, Figure 3A 、 3B , 4, 5A, 5B, 6A, 6B, and 6C are provided as examples. Other examples can differ from what is described with respect to at least one of the Figure 3A 、 3B , 4, 5A, 5B, 6A, 6B, and 6C.

[0086] Figure 7 is a flow diagram illustrating an example process 700 performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 700 is an example of a first radio access technology (RAT) channel state feedback (CSF) for dynamic spectrum sharing (DSS) to increase accuracy of interference estimation from a second RAT neighbor cell.

[0087] like Figure 7 As shown, in some aspects, process 700 may include receiving from a base station a message (block 702) indicating at least one report configuration and resource configuration for several Channel State Information Interference Measurement (CSI-IM) resource modes associated with a first Radio Access Technology (RAT). The report configuration may be transmitted via RRC signaling and may be configured for the reporting periodicity of several CSI reports, wherein each CSI report may correspond to one or more CSI-IM resource modes, such as reference... Figure 6A , 6B The CSI-IM resource patterns 600, 620, and 650 described in 6C. That is, each of these CSI-IM resource patterns corresponds to a time and frequency location in a resource block of a neighboring cell associated with the second RAT. In one configuration, the reporting periodicity is periodic. In another configuration, the reporting periodicity is semi-persistent. In yet another configuration, the reporting periodicity is aperiodic. In one example, the user equipment (UE) (e.g., using antenna 252, DEMOD / MOD 254, MIMO detector 256, receive processor 258, controller / processor 280, and / or memory 282) can receive messages indicating the reporting configuration.

[0088] As in Figure 7 As shown, in some aspects, process 700 may include transmitting one or more CSI reports based on the report configuration and the resource configuration (block 704). According to various aspects of this disclosure, the CSI report includes an interference measurement based on the total interference power of a set of resource elements (REs) of resource blocks aligned with the time and frequency locations of one or more CSI-IM resource patterns corresponding to the CSI report. As described in Equations 1, 2, and 3, the set of REs may include: one or more cell-specific reference signal (CRS) REs, one or more first PDSCH REs among the symbols including the CRS REs, and / or one or more second PDSCH REs among the symbols excluding the CRS REs. In one configuration, for a periodic reporting period, the UE transmits each CSI report from several CSI reports according to the periodic reporting period. In this configuration, the UE measures interference for each CSI-IM resource pattern in the configured CSI-IM resource patterns.

[0089] In another configuration, for a semi-persistent reporting periodicity, the UE transmits each CSI report in a set of CSI reports identified from a number of CSI reports according to the semi-persistent reporting periodicity. In this configuration, the UE receives a signal for activating the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports. Additionally, in this configuration, the UE measures an interference power for each CSI-IM resource pattern in the set of configured CSI-IM resource patterns.

[0090] In yet another configuration, for an aperiodic reporting periodicity, the UE transmits each CSI report in a set of CSI reports identified from a number of CSI reports in response to a trigger. In this configuration, the UE receives a trigger for triggering the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports. Additionally, in this configuration, the UE measures an interference power for each CSI-IM resource pattern in the set of configured CSI-IM resource patterns.

[0091] As an example, the UE (e.g., using the antenna 252, DEMOD / MOD 254, TX MIMO processor 266, transmit processor 264, controller / processor 280, and / or memory 282) can transmit one or more CSI reports based on the reporting configuration(s) and resource configuration(s).

[0092] Figure 8 is a flowchart illustrating an example process 800 performed, for example, by a base station, in accordance with various aspects of the present disclosure. Example process 800 is an example of a first radio access technology (RAT) channel state feedback (CSF) for dynamic spectrum sharing (DSS) to increase accuracy of interference estimates from a second RAT neighbor cell.

[0093] As Figure 8 shown in FIG. 8B, in some aspects, process 800 can include configuring at least one reporting configuration and resource configuration for a number of channel state information interference measurement (CSI-IM) resource patterns associated with a first RAT (block 802). In one configuration, each CSI-IM resource pattern of the number of CSI-IM resource patterns corresponds to a different time and frequency location in a resource block of a neighbor cell associated with a second RAT. In one configuration, the reporting configuration configures a reporting periodicity for a number of CSI reports. The reporting periodicity can be periodic, aperiodic, or semi-persistent. Additionally, each CSI report can correspond to one or more CSI-IM resource patterns, such as the CSI-IM resource patterns 600, 620, 650 described with reference to FIGs. Figure 6A 、 6B and 6C.

[0094] As an example, the base station (e.g., using antenna 234, MOD / DEMOD 232, TX MIMO processor 230, transmit processor 220, controller / processor 240, and / or memory 242) can configure the report configuration(s) and the resource configuration(s).

[0095] As Figure 8 As shown in some aspects, process 800 can include transmitting, to a UE, a message including the report configuration(s) and the resource configuration(s) (block 804). The report configuration(s) and the resource configuration(s) can be transmitted via RRC signaling. For example, the base station (e.g., using antenna 234, MOD / DEMOD 232, TX MIMO processor 230, transmit processor 220, controller / processor 240, and / or memory 242) can transmit the message including the report configuration(s) and the resource configuration(s).

[0096] In other aspects, process 800 can include receiving, from the UE, one or more CSI reports based on the transmitted message (block 806). Each CSI report can include an interference measurement based on a total interference power of a set of resource elements (REs) of resource blocks aligned with time and frequency locations of one or more CSI-IM resource patterns corresponding to the CSI report. As described in Equations 1, 2, and 3, the set of REs can include one or more cell-specific reference signal (CRS) REs, one or more first PDSCH REs in a symbol including the CRS REs, and / or one or more second PDSCH REs in a symbol not including the CRS REs. In one configuration, the base station also receives, from the UE, a signal strength measurement of a neighbor cell.

[0097] According to aspects of the present disclosure, for a periodic reporting periodicity, the base station receives each of a number of CSI reports according to the periodic reporting periodicity. In such aspects, the base station selects one or more CSI reports from the number of CSI reports based on the signal strength measurement of the neighbor cell. Additionally, the base station schedules the UE based on the interference measurement of the one or more CSI reports.

[0098] According to other aspects, for a semi-persistent reporting periodicity, the base station receives each of a set of CSI reports identified from a number of CSI reports according to the semi-persistent reporting periodicity. In such aspects, the base station can transmit a signal to activate the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports based on the signal strength measurement of the neighbor cell.

[0099] According to yet other aspects, for an aperiodic reporting periodicity, the base station receives each of a set of CSI reports of a plurality of CSI reports in response to a trigger. In these aspects, the base station can transmit the trigger for triggering the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports based on signal strength measurements of neighbor cells.

[0100] As an example, the base station (e.g., using the antennas 234, MOD / DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, and / or memory 242) can receive one or more CSI reports based on the transmitted message.

[0101] Implementation examples are described in the following numbered clauses.

[0102] 1. A method for wireless communication performed by a user equipment (UE), comprising:

[0103] receiving, from a base station, a message including at least one reporting configuration for a plurality of channel state information-interference measurement (CSI-IM) resource patterns associated with a first radio access technology (RAT) and at least one resource configuration, each of the plurality of CSI-IM resource patterns corresponding to a time and frequency location in a resource block of a neighbor cell associated with a second RAT; and

[0104] transmitting at least one CSI report based on the at least one reporting configuration and the at least one resource configuration.

[0105] 2. The method of clause 1, wherein:

[0106] the at least one reporting configuration configures reporting for a plurality of CSI reports, each of the plurality of CSI reports corresponding to a CSI-IM resource pattern of the plurality of CSI-IM resource patterns;

[0107] the interference measurement of each CSI report includes a total interference power of a set of resource elements (REs) of the resource block aligned with the time and frequency location of the CSI-IM resource pattern corresponding to the CSI report; and

[0108] the set of REs includes at least one of: a cell-specific reference signal (CRS) RE, a first physical downlink shared channel (PDSCH) RE in a symbol including the CRS RE, or a second PDSCH RE in a symbol not including the CRS RE.

[0109] 3. The method of clause 1 or 2, wherein:

[0110] The at least one report configuration indicates the periodicity of the report;

[0111] The transmission of the at least one CSI report includes transmitting each of the plurality of CSI reports according to the periodic reporting period; and

[0112] The method further includes measuring interference for each of the plurality of CSI-IM resource modes.

[0113] 4. The method as described in either Clause 1 or 2, wherein:

[0114] This at least one report configuration indicates semi-persistent report periodicity;

[0115] The transmission of the at least one CSI report includes transmitting each CSI report from the set of multiple CSI reports according to the semi-persistent reporting periodicity; and

[0116] The method further includes:

[0117] Receive signals for activating the CSI report set and the corresponding CSI-IM resource mode set; and

[0118] Measure the interference power for each CSI-IM resource mode in this set of CSI-IM resource modes.

[0119] 5. The method of any of Clauses 1, 2 or 4, wherein the CSI resource is a semi-persistent resource or a periodic resource.

[0120] 6. The method as described in either Clause 1 or 2, wherein:

[0121] The at least one report configuration indicates the periodicity of non-periodic reporting;

[0122] Transmitting the at least one CSI report includes transmitting each CSI report from the set of multiple CSI reports in response to a trigger; and

[0123] The method further includes:

[0124] Receive triggers for triggering the CSI report set and the corresponding CSI-IM resource mode set; and

[0125] Measure the interference power for each CSI-IM resource mode in this set of CSI-IM resource modes.

[0126] 7. The method of any of Clauses 1, 2 or 6, wherein the CSI resource is a periodic resource, a semi-persistent resource or a non-periodic resource.

[0127] 8. The method of any of the preceding clauses, wherein a first frequency shift parameter (vShift) of cell-specific reference signal (CRS) resource elements (REs) of a serving cell of the second RAT is different than a second vShift of CRS REs of the neighbor cell.

[0128] 9. A method for wireless communication performed by a base station associated with a first radio access technology (RAT), comprising:

[0129] configuring at least one reporting configuration and at least one resource configuration for a plurality of channel state information-interference measurement (CSI-IM) resource patterns associated with the first RAT, each CSI-IM resource pattern of the plurality of CSI-IM resource patterns corresponding to time and frequency locations in a resource block of a neighbor cell associated with a second RAT;

[0130] transmitting, to a user equipment (UE), a message including the at least one reporting configuration and the at least one resource configuration; and

[0131] receiving, from the UE, at least one CSI report based on the transmitted message.

[0132] 10. The method of clause 9, wherein:

[0133] the at least one reporting configuration configures reporting for a plurality of CSI reports, each CSI report of the plurality of CSI reports corresponding to a CSI-IM resource pattern of the plurality of CSI-IM resource patterns;

[0134] each CSI report includes an interference measurement based on a total interference power of a set of resource elements (REs) of the resource block aligned with the time and frequency locations of the CSI-IM resource pattern corresponding to the CSI report;

[0135] the set of REs includes at least one of: a cell-specific reference signal (CRS) RE, a first physical downlink shared channel (PDSCH) RE in a symbol including the CRS RE, or a second PDSCH RE in a symbol not including the CRS RE; and

[0136] the method further includes receiving, from the UE, a signal strength measurement of the neighbor cell.

[0137] 11. The method of clause 9 or 10, wherein:

[0138] the at least one reporting configuration indicates a periodic reporting periodicity;

[0139] Receiving the at least one CSI report includes receiving each of the plurality of CSI reports according to the periodic reporting period; and

[0140] The method further includes:

[0141] Based on the signal strength measurement of the neighboring cell, select one or more CSI reports from the multiple CSI reports; and

[0142] The UE is scheduled based on interference measurements from one or more CSI reports.

[0143] 12. The method as in either clause 9 or 10, wherein:

[0144] This at least one report configuration indicates semi-persistent report periodicity;

[0145] Receiving the at least one CSI report includes receiving each CSI report from the set of multiple CSI reports according to the semi-persistent reporting periodicity; and

[0146] The method further includes transmitting a signal for activating the CSI report set and the CSI-IM resource pattern set corresponding to the CSI report set, based on the signal strength measurement of the neighboring cell.

[0147] 13. The method of any of Clauses 9, 10 or 12, wherein the CSI resource is a semi-persistent resource or a periodic resource.

[0148] 14. The method as in either Clause 9 or 10, wherein:

[0149] The at least one report configuration indicates the periodicity of non-periodic reporting;

[0150] Receiving the at least one CSI report includes receiving each CSI report from a set of multiple CSI reports in response to a trigger; and

[0151] The method further includes transmitting a trigger for triggering the CSI report set and the corresponding CSI-IM resource pattern set based on the signal strength measurement of the neighboring cell.

[0152] 15. The method of any of Clauses 9, 10 or 14, wherein the CSI resource is a periodic resource, a semi-persistent resource or a non-periodic resource.

[0153] 16. The method of any of clauses 9-15, wherein a first frequency shift parameter (vShift) of cell-specific reference signal (CRS) resource elements (REs) of a serving cell of the second RAT is different than a second vShift of CRS REs of the neighbor cell.

[0154] 17. An apparatus for wireless communication at a user equipment (UE), comprising:

[0155] a processor;

[0156] a memory coupled with the processor; and

[0157] instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:

[0158] receive, from a base station, a message comprising at least one reporting configuration and at least one resource configuration for a plurality of channel state information-interference measurement (CSI-IM) resource patterns associated with a first radio access technology (RAT), each of the plurality of CSI-IM resource patterns corresponding to time and frequency locations in a resource block of a neighbor cell associated with a second RAT; and

[0159] transmit at least one CSI report based on the at least one reporting configuration and the at least one resource configuration.

[0160] 18. The apparatus of clause 17, wherein:

[0161] the at least one reporting configuration configures reporting for a plurality of CSI reports, each of the plurality of CSI reports corresponding to a CSI-IM resource pattern of the plurality of CSI-IM resource patterns;

[0162] the interference measurement of each CSI report comprises a total interference power of a set of resource elements (REs) of the resource block aligned with the time and frequency locations of the CSI-IM resource pattern corresponding to the CSI report; and

[0163] the set of REs comprises at least one of: a cell-specific reference signal (CRS) RE, a first physical downlink shared channel (PDSCH) RE in a symbol comprising the CRS RE, or a second PDSCH RE in a symbol not comprising the CRS RE.

[0164] 19. The apparatus of clause 17 or 18, wherein:

[0165] the at least one reporting configuration indicates a periodic reporting periodicity; and

[0166] the processor causes the apparatus to:

[0167] transmitting the at least one CSI report by transmitting each CSI report of the plurality of CSI reports according to the periodic reporting periodicity; and

[0168] measuring an interference measurement for each CSI-IM resource pattern of the plurality of CSI-IM resource patterns.

[0169] 20. The apparatus of any of clauses 17 or 18, wherein:

[0170] the at least one reporting configuration indicates a semi-persistent reporting periodicity; and

[0171] the processor causes the apparatus to:

[0172] transmit the at least one CSI report by transmitting each CSI report of a set of CSI reports from the plurality of CSI reports according to the semi-persistent reporting periodicity;

[0173] receive a signal for activating the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports; and

[0174] measure an interference power for each CSI-IM resource pattern of the set of CSI-IM resource patterns.

[0175] 21. The apparatus of any of clauses 17 or 18, wherein:

[0176] the at least one reporting configuration indicates an aperiodic reporting periodicity; and

[0177] the processor causes the apparatus to:

[0178] transmit the at least one CSI report by transmitting each CSI report of a set of CSI reports from the plurality of CSI reports in response to a trigger; and

[0179] receive a trigger for triggering the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports; and

[0180] measure an interference power for each CSI-IM resource pattern of the set of CSI-IM resource patterns.

[0181] 22. The apparatus of any of clauses 17-21, wherein a first frequency shift parameter (vShift) of a cell-specific reference signal (CRS) resource element (RE) of a serving cell of the second RAT is different from a second vShift of a CRS RE of the neighbor cell.

[0182] 23. An apparatus for wireless communication at a base station associated with a first radio access technology (RAT), comprising:

[0183] a processor;

[0184] a memory coupled with the processor; and

[0185] instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:

[0186] configure at least one reporting configuration and at least one resource configuration for a plurality of channel state information-interference measurement (CSI-IM) resource patterns associated with the first RAT, each of the plurality of CSI-IM resource patterns corresponding to time and frequency locations in a resource block of a neighbor cell associated with a second RAT;

[0187] transmit, to a user equipment (UE), a message including the at least one reporting configuration and the at least one resource configuration; and

[0188] receive, from the UE, at least one CSI report based on the transmitted message.

[0189] 24. The apparatus of clause 23, wherein:

[0190] the at least one reporting configuration configures reporting for a plurality of CSI reports, each of the plurality of CSI reports corresponding to a CSI-IM resource pattern of the plurality of CSI-IM resource patterns;

[0191] each CSI report includes an interference measurement based on a total interference power of a set of resource elements (REs) of the resource block aligned with the time and frequency locations of the CSI-IM resource pattern corresponding to the CSI report;

[0192] the set of REs includes at least one of: a cell-specific reference signal (CRS) RE, a first physical downlink shared channel (PDSCH) RE in a symbol including the CRS RE, or a second PDSCH RE in a symbol not including the CRS RE; and

[0193] the processor causes the apparatus to receive, from the UE, a signal strength measurement of the neighbor cell.

[0194] 25. The apparatus of any of clauses 23 or 24, wherein the CSI resource is a semi-persistent resource or a periodic resource.

[0195] 26. The apparatus of any of clauses 23 or 24, wherein:

[0196] the at least one reporting configuration indicates a periodic reporting periodicity; and

[0197] the processor causes the apparatus to:

[0198] receive the at least one CSI report by receiving each CSI report of the plurality of CSI reports according to the periodic reporting periodicity;

[0199] select one or more CSI reports from the plurality of CSI reports based on the signal strength measurement of the neighbor cell; and

[0200] schedule the UE based on an interference measurement of the one or more CSI reports.

[0201] 27. The apparatus of any of clauses 23 or 24, wherein:

[0202] the at least one reporting configuration indicates a semi-persistent reporting periodicity; and

[0203] the processor causes the apparatus to:

[0204] receive the at least one CSI report by receiving each CSI report of a set of CSI reports from the plurality of CSI reports according to the semi-persistent reporting periodicity; and

[0205] transmit a signal to activate the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports based on the signal strength measurement of the neighbor cell.

[0206] 28. The apparatus of any of clauses 23, 24, or 27, wherein a CSI resource is a periodic resource, a semi-persistent resource, or an aperiodic resource.

[0207] 29. The apparatus of any of clauses 23 or 24, wherein:

[0208] the at least one reporting configuration indicates an aperiodic reporting periodicity; and

[0209] the processor causes the apparatus to:

[0210] receive the at least one CSI report by receiving each CSI report of a set of CSI reports from the plurality of CSI reports in response to a trigger; and

[0211] transmit a trigger to trigger the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports based on the signal strength measurement of the neighbor cell.

[0212] 30. An apparatus of any of Clauses 23-29, wherein the first frequency shift parameter (vShift) of the cell-specific reference signal (CRS) resource element (RE) of the serving cell of the second RAT is different from the second vShift of the CRS RE of the neighboring cell.

[0213] The foregoing disclosure provides explanations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the foregoing disclosure or may be obtained through practice.

[0214] As used, the term "component" is intended to be interpreted broadly as hardware, firmware, and / or a combination of hardware and software. As used, the processor is implemented using hardware, firmware, and / or a combination of hardware and software.

[0215] Some aspects are described in conjunction with thresholds. As used, depending on the context, satisfying a threshold can mean a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0216] It will be apparent that the described systems and / or methods can be implemented in various forms, including hardware, firmware, and / or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods is not limited in any aspect. Thus, the operation and behavior of these systems and / or methods are described without reference to any specific software code—it is understood that software and hardware can be designed to implement these systems and / or methods, at least in part, based on this description.

[0217] Although specific combinations of features are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of aspects. In fact, many of these features can be combined in ways not specifically described in the claims and / or disclosed in the specification. Although each dependent claim listed below may be directly subordinated to only one claim, the disclosure of aspects includes each dependent claim being combined with each other claim in this set of claims. The phrase “at least one” referring to a list of items refers to any combination of these items, including single members. As an example, “at least one of a, b, or c” is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination having multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0218] No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items, and can be used interchangeably with “one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, a combination of related and unrelated items, or the like), and can be used interchangeably with “one or more.” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has,” “have,” “having,” or the like are intended to be open-ended terms. Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise.

Claims

1. A method for wireless communication performed by a user equipment (UE), comprising: receiving, from a network entity, a message including at least one reporting configuration and at least one resource configuration for a plurality of channel state information-interference measurement (CSI-IM) resource patterns associated with a first radio access technology (RAT), each of the plurality of CSI-IM resource patterns corresponding to a time and frequency location in a resource block of a neighbor cell associated with a second RAT, wherein a first frequency shift parameter (vShift) of a cell-specific reference signal (CRS) resource element (RE) of a serving cell of the second RAT is different from a second vShift of a CRS RE of the neighbor cell; and transmitting at least one CSI report based on the at least one reporting configuration and the at least one resource configuration.

2. The method of claim 1, wherein: the at least one reporting configuration configures reporting for a plurality of CSI reports, each of the plurality of CSI reports corresponding to a CSI-IM resource pattern of the plurality of CSI-IM resource patterns; an interference measurement of each CSI report includes a total interference power of a set of resource elements (REs) of the resource block aligned with the time and frequency location of the CSI-IM resource pattern corresponding to the CSI report; and the set of REs includes at least one of a cell-specific reference signal (CRS) RE, a first physical downlink shared channel (PDSCH) RE in a symbol including the CRS RE, or a second PDSCH RE in a symbol not including the CRS RE.

3. The method of claim 2, wherein: the at least one reporting configuration indicates a periodic reporting periodicity; transmitting the at least one CSI report includes transmitting each of the plurality of CSI reports according to the periodic reporting periodicity; and the method further comprises measuring an interference measurement for each of the plurality of CSI-IM resource patterns.

4. The method of claim 2, wherein: the at least one reporting configuration indicates a semi-persistent reporting periodicity; transmitting the at least one CSI report includes transmitting each of a set of CSI reports from the plurality of CSI reports according to the semi-persistent reporting periodicity; and the method further comprises: receiving a signal to activate the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports; and measuring an interference power for each of the set of CSI-IM resource patterns.

5. The method of claim 4, wherein a CSI resource is a semi-persistent resource or a periodic resource.

6. The method of claim 2, wherein: the at least one reporting configuration indicates an aperiodic reporting periodicity; the at least one reporting configuration indicates an aperiodic reporting periodicity; transmitting the at least one CSI report includes transmitting each CSI report in a set of CSI reports from the plurality of CSI reports in response to the trigger; and the method further includes: receiving a trigger for the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports; and measuring an interference power for each CSI-IM resource pattern in the set of CSI-IM resource patterns.

7. The method of claim 6, wherein a CSI resource is a periodic resource, a semi-persistent resource, or an aperiodic resource.

8. A method for wireless communication performed by a network entity associated with a first radio access technology (RAT), comprising: configuring at least one reporting configuration and at least one resource configuration for a plurality of channel state information interference measurement (CSI-IM) resource patterns associated with the first RAT, each CSI-IM resource pattern in the plurality of CSI-IM resource patterns corresponding to a time and frequency location in a resource block of a neighbor cell associated with a second RAT, wherein a first frequency shift parameter (vShift) of a cell-specific reference signal (CRS) resource element (RE) of a serving cell of the second RAT is different from a second vShift of a CRS RE of the neighbor cell; transmitting, to a user equipment (UE), a message including the at least one reporting configuration and the at least one resource configuration; and receiving, from the UE, at least one CSI report based on the transmitted message.

9. The method of claim 8, wherein: the at least one reporting configuration configures reporting for a plurality of CSI reports, each CSI report in the plurality of CSI reports corresponding to a CSI-IM resource pattern in the plurality of CSI-IM resource patterns; each CSI report includes an interference measurement based on a total interference power of a set of resource elements (REs) of the resource block aligned with the time and frequency location of the CSI-IM resource pattern corresponding to the CSI report; the set of REs includes at least one of a cell-specific reference signal (CRS) RE, a first physical downlink shared channel (PDSCH) RE in a symbol including the CRS RE, or a second PDSCH RE in a symbol not including the CRS RE; and the method further includes receiving, from the UE, a signal strength measurement of the neighbor cell.

10. The method of claim 9, wherein: the at least one reporting configuration indicates a periodic reporting periodicity; receiving the at least one CSI report includes receiving each CSI report in the plurality of CSI reports according to the periodic reporting periodicity; and the method further includes: selecting one or more CSI reports from the plurality of CSI reports based on the signal strength measurement of the neighbor cell; and scheduling the UE based on interference measurements of the one or more CSI reports.

11. The method of claim 9, wherein: the at least one report configuration indicates a semi-persistent reporting periodicity; receiving the at least one CSI report includes receiving each CSI report in a set of CSI reports from the multiple CSI reports according to the semi-persistent reporting periodicity; and the method further comprises transmitting a signal to activate the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports based on the signal strength measurements of the neighbor cells.

12. The method of claim 11, wherein a CSI resource is a semi-persistent resource or a periodic resource.

13. The method of claim 9, wherein: the at least one report configuration indicates an aperiodic reporting periodicity; receiving the at least one CSI report includes receiving each CSI report in a set of CSI reports from the multiple CSI reports in response to a trigger; and the method further comprises transmitting a trigger to trigger the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports based on the signal strength measurements of the neighbor cells.

14. The method of claim 13, wherein a CSI resource is a periodic resource, a semi-persistent resource, or an aperiodic resource.

15. An apparatus for wireless communication at a user equipment (UE), comprising: a processor; memory coupled with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to: receive, from a network entity, a message including at least one report configuration for a plurality of channel state information interference measurement (CSI-IM) resource patterns associated with a first radio access technology (RAT) and at least one resource configuration, each CSI-IM resource pattern in the plurality of CSI-IM resource patterns corresponding to a time and frequency location in a resource block of a neighbor cell associated with a second RAT, wherein a first frequency shift parameter (vShift) of a cell-specific reference signal (CRS) resource element (RE) of a serving cell of the second RAT is different from a second vShift of a CRS RE of the neighbor cell; and transmit at least one CSI report based on the at least one report configuration and the at least one resource configuration.

16. The apparatus of claim 15, wherein: the at least one report configuration configures reporting for a plurality of CSI reports, each CSI report in the plurality of CSI reports corresponding to a CSI-IM resource pattern in the plurality of CSI-IM resource patterns; the interference measurement of each CSI report includes a total interference power of a set of resource elements (REs) of the resource block aligned with the time and frequency location of the CSI-IM resource pattern corresponding to the CSI report; and The RE set includes at least one of cell-specific reference signal (CRS) REs, first physical downlink shared channel (PDSCH) REs in a symbol including the CRS REs, or second PDSCH REs in a symbol not including the CRS REs.

17. The apparatus of claim 16, wherein: the at least one reporting configuration indicates a periodic reporting periodicity; and the processor causes the apparatus to: transmit the at least one CSI report by transmitting each CSI report of the plurality of CSI reports according to the periodic reporting periodicity; and measure an interference measurement for each CSI-IM resource pattern of the plurality of CSI-IM resource patterns.

18. The apparatus of claim 16, wherein: the at least one reporting configuration indicates a semi-persistent reporting periodicity; and the processor causes the apparatus to: transmit the at least one CSI report by transmitting each CSI report of a set of CSI reports from the plurality of CSI reports according to the semi-persistent reporting periodicity; receive a signal for activating the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports; and measure an interference power for each CSI-IM resource pattern of the set of CSI-IM resource patterns.

19. The apparatus of claim 18, wherein a CSI resource is a semi-persistent resource or a periodic resource.

20. The apparatus of claim 16, wherein: the at least one reporting configuration indicates an aperiodic reporting periodicity; and the processor causes the apparatus to: transmit the at least one CSI report by transmitting each CSI report of a set of CSI reports from the plurality of CSI reports in response to a trigger; and receive a trigger for triggering the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports; and measure an interference power for each CSI-IM resource pattern of the set of CSI-IM resource patterns.

21. The apparatus of claim 20, wherein a CSI resource is a periodic resource, a semi-persistent resource, or an aperiodic resource.

22. An apparatus for wireless communication at a network entity associated with a first radio access technology (RAT), comprising: a processor; memory coupled with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to: configure at least one reporting configuration and at least one resource configuration for a plurality of channel state information-interference measurement (CSI-IM) resource patterns associated with the first RAT, each of the plurality of CSI-IM resource patterns corresponding to a time and frequency location in a resource block of a neighbor cell associated with a second RAT, wherein a first frequency shift parameter (vShift) of a cell-specific reference signal (CRS) resource element (RE) of a serving cell of the second RAT is different from a second vShift of a CRS RE of the neighbor cell; transmit, to a user equipment (UE), a message including the at least one reporting configuration and the at least one resource configuration; and receive, from the UE, at least one CSI report based on the transmitted message.

23. The apparatus of claim 22, wherein: the at least one reporting configuration configures reporting for a plurality of CSI reports, each of the plurality of CSI reports corresponding to a CSI-IM resource pattern of the plurality of CSI-IM resource patterns; each CSI report includes an interference measurement based on a total interference power of a set of resource elements (REs) of the resource block aligned with the time and frequency location of the CSI-IM resource pattern corresponding to the CSI report; the set of REs includes at least one of a cell-specific reference signal (CRS) RE, a first physical downlink shared channel (PDSCH) RE in a symbol including the CRS RE, or a second PDSCH RE in a symbol not including the CRS RE; and the processor causes the apparatus to receive, from the UE, a signal strength measurement of the neighbor cell.

24. The apparatus of claim 23, wherein a CSI resource is a semi-persistent resource or a periodic resource.

25. The apparatus of claim 23, wherein: the at least one reporting configuration indicates a periodic reporting periodicity; and the processor causes the apparatus to: receive the at least one CSI report by receiving each of the plurality of CSI reports according to the periodic reporting periodicity; select one or more CSI reports from the plurality of CSI reports based on the signal strength measurement of the neighbor cell; and schedule the UE based on the interference measurement of the one or more CSI reports.

26. The apparatus of claim 23, wherein: the at least one reporting configuration indicates a semi-persistent reporting periodicity; and the processor causes the apparatus to: receive the at least one CSI report by receiving each of a set of CSI reports from the plurality of CSI reports according to the semi-persistent reporting periodicity; and transmit, based on the signal strength measurement of the neighbor cell, a signal to activate the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports. ​ 27. The apparatus of claim 25, wherein a CSI resource is a periodic resource, a semi-persistent resource, or an aperiodic resource.

28. The apparatus of claim 23, wherein: the at least one report configuration indicates an aperiodic reporting periodicity; and the processor causes the apparatus to: receive the at least one CSI report by receiving each CSI report in a set of CSI reports from the plurality of CSI reports in response to a trigger; and transmit a trigger for the set of CSI reports and a set of CSI-IM resource patterns corresponding to the set of CSI reports based on the signal strength measurements of the neighbor cells.

29. The apparatus of claim 28, wherein a CSI resource is a periodic resource, a semi-persistent resource, or an aperiodic resource.

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