Remote interference management reference signal transmission

Abstract

A method, a base station (BS), a user equipment (UE), an apparatus, and a computer program product for wireless communication are provided. The attacker BS may cause a remote interference condition to the victim BS, and the victim BS may transmit a reference signal to the attacker BS to enable remote interference management (RIM) operations to be performed. However, the aggressor BS may not be able to identify the victim BS based at least in part on the reference signal, and may not be able to transmit the reference signal in response. In addition, when the attacker BS does transmit the reference signal, the victim BS may not identify the attacker BS. This may reduce the effectiveness of RIM operations. In some aspects, a BS may transmit a reciprocal reference signal including identification information to enable efficient RIM operation.

Description

[0001] This divisional application is a divisional application of the PCT national phase patent application with a PCT international filing date of September 24, 2019, national application number 201980062013.2, and titled “Remote Interference Management Reference Signal Transmission”. Technical Field

[0002] Aspects of the present disclosure relate generally to wireless communications and, more particularly, to techniques and apparatus for remote interference management reference signal transmission. Background Art

[0003] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may 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, LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0004] A wireless communication network may include several base stations (BSs) that can support communication for several user equipments (UEs). The UE may communicate with the BS via a downlink and an 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 herein, the BS may be referred to as a Node B, a gNB, an Access Point (AP), a Radio Head, a Transmit Receiving Point (TRP), a 5G BS, a 5G Node B, and the like.

[0005] The above multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different wireless communication devices to communicate at city, country, region, and even global levels. 5G (which may also be referred to as New Radio (NR)) is an enhancement set to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). 5G is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and using OFDM (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also referred to as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink (UL) and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation. Other open standards are better integrated to better support mobile broadband Internet access. However, as the demand for mobile broadband access continues to grow, there is a need for further improvements in LTE and 5G technology. Preferably, these improvements should be applicable to other multiple access technologies and telecommunication standards that adopt these technologies.

[0006] In most scenarios, the downlink signal of the base station can be observed only within and near the edge of the coverage area of ​​the cellular cell provided by the base station. However, in some scenarios, as a result of atmospheric waveguides; reflections from mountains, sea surfaces or clouds, etc., the downlink signal of the base station may propagate far beyond the coverage area (e.g., beyond tens of kilometers, hundreds of kilometers, etc.). In such situations, the downlink signal of the base station may interfere with another base station, which may be referred to as a long-range interference situation. The base station transmitting the downlink signal may be referred to as the attacker base station, and the base station receiving the downlink signal may be referred to as the victim base station. In some cases, the interference may be reciprocal, so that the first base station is the attacker of the second base station (which is therefore the victim), and the second base station is the attacker of the first base station (which is therefore the victim). In some cases, multiple base stations may be attackers and / or victims. For example, the communication of the victim base station may be interfered with by transmissions from multiple attacker base stations.

[0007] One situation where such interference may occur is when the attacker base station and the victim base station have the same time division duplex (TDD) configuration. This may occur because the attacker base station and the victim base station are far apart, so normal interference countermeasures (e.g., different TDD configurations, gaps, etc.) do not account for both the victim base station and the attacker base station. In the case of propagation delay between the attacker base station and the victim base station, the downlink signal of the attacker base station may overlap into the uplink portion of the frame configuration of the victim base station. This may cause interference between the victim base station and the uplink communication to the victim base station.

[0008] A victim base station, an attacker base station, and / or another device (e.g., a UE associated with the victim base station, a network device, an operation / regulatory / management device, etc.) may perform one or more remote interference management (RIM) operations to mitigate remote interference. In some cases, two or more devices may coordinate to perform RIM operations to mitigate remote interference. For example, the victim base station and the attacker base station may change their respective communication configurations to reduce the likelihood of overlap between downlink transmissions of the attacker base station and uplink transmissions of the victim base station. Similarly, the attacker base station may change transmit power, transmit angle, etc. to reduce the likelihood that the attacker base station transmissions interfere with the victim base station communications, and the victim base station may change gain values, receive angles, etc. to reduce the likelihood of receiving attacker base station transmissions. The base station may transmit a reference signal to enable measurement of channel conditions and / or interference, which may enable the base station to determine a RIM operation that can successfully mitigate remote interference.

[0009] However, in a situation where multiple attacker base stations interfere with a single victim base station, the victim base station may receive multiple reference signals and may only be able to determine the amount of aggregate interference, rather than the contribution of each base station to the long-range interference condition. In this situation, the victim base station may be unable to successfully select a RIM operation to be performed, be unable to identify the attacker base station so that the attacker base station performs the RIM operation, and so on. In addition, in some situations, when a long-range interference condition is detected, only one of the victim base station or the attacker base station may transmit a reference signal. As a result, for example, the victim base station may be able to determine the long-range interference based at least in part on the received reference signals, but the attacker base station may not be able to determine the long-range interference. This may result in the selection of a less successful RIM operation, the inability of the attacker base station to perform any RIM operation, the inability to mitigate a reciprocal long-range interference condition, and so on. Summary of the invention

[0010] Some aspects described herein may enable improved remote interference management (RIM) reference signal transmission. For example, a first base station (e.g., a victim base station) may detect an interference situation and may transmit a reference signal including information identifying the first base station. In this case, a second base station (e.g., an attacker base station that receives the reference signal) may determine the identity of the first base station, which may assist the second base station in determining RIM operation (e.g., such as changing the transmission angle to avoid the location of the first base station). Similarly, in response to receiving the first reference signal, the second base station may transmit a second reference signal including information identifying the second base station. In this case, the first base station may determine the identity of the second base station, which may assist the first base station in determining RIM operation (e.g., such as by enabling the first base station to distinguish between the second base station and one or more other base stations that cause the interference situation). In this way, the efficacy of RIM operation is improved, thereby reducing the likelihood of interference in the network, improving network performance, reducing the likelihood of dropped packets and / or lost communications, and the like.

[0011] In one aspect of the present disclosure, a method, a base station (BS), an equipment, and a computer program product are provided.

[0012] In some aspects, the method may be performed by a first base station. The method may include transmitting a first reference signal based at least in part on the occurrence of a long-range interference condition, wherein the first reference signal corresponds to a first device identifier that identifies the first base station. The method may include receiving a second reference signal after transmitting the first reference signal, wherein the second reference signal corresponds to a second device identifier that identifies a second base station.

[0013] In some aspects, a first base station may include a memory and one or more processors coupled to the memory. The memory and the one or more processors may be configured to transmit a first reference signal based at least in part on the occurrence of a long-range interference condition, wherein the first reference signal corresponds to a first device identifier that identifies the first base station. The memory and the one or more processors may be configured to receive a second reference signal after transmitting the first reference signal, wherein the second reference signal corresponds to a second device identifier that identifies the second base station.

[0014] In some aspects, the apparatus may include: means for transmitting a first reference signal based at least in part on the occurrence of a long-range interference condition, wherein the first reference signal corresponds to a first device identifier that identifies the apparatus. The apparatus may include: means for receiving a second reference signal after transmitting the first reference signal, wherein the second reference signal corresponds to a second device identifier that identifies the base station.

[0015] In some aspects, a computer program product may include a non-transitory computer-readable medium storing one or more instructions. The one or more instructions, when executed by one or more processors of a first base station, may cause the one or more processors to: transmit a first reference signal based at least in part on the occurrence of a long-range interference condition, wherein the first reference signal corresponds to a first device identifier that identifies the first base station. The one or more instructions, when executed by the one or more processors of the first base station, may cause the one or more processors to: receive a second reference signal after transmitting the first reference signal, wherein the second reference signal corresponds to a second device identifier that identifies the second base station.

[0016] In some aspects, the method may be performed by a first base station. The method may include: receiving a first reference signal associated with a remote interference condition, wherein the first reference signal corresponds to a first device identifier that identifies a second base station. The method may include: transmitting a second reference signal after receiving the first reference signal as a response to receiving the first reference signal, wherein the second reference signal corresponds to a second device identifier that identifies the first base station.

[0017] In some aspects, a first base station may include a memory and one or more processors coupled to the memory. The memory and the one or more processors may be configured to: receive a first reference signal associated with a remote interference condition, wherein the first reference signal corresponds to a first device identifier that identifies a second base station. The memory and the one or more processors may be configured to: transmit a second reference signal after receiving the first reference signal as a response to receiving the first reference signal, wherein the second reference signal corresponds to a second device identifier that identifies the first base station.

[0018] In some aspects, the apparatus may include: means for receiving a first reference signal associated with a remote interference condition, wherein the first reference signal corresponds to a first device identifier identifying a base station. The apparatus may include: means for transmitting a second reference signal after receiving the first reference signal as a response to receiving the first reference signal, wherein the second reference signal corresponds to a second device identifier identifying the apparatus.

[0019] In some aspects, a computer program product may include a non-transitory computer-readable medium storing one or more instructions. The one or more instructions, when executed by one or more processors of a first base station, may cause the one or more processors to: receive a first reference signal associated with a remote interference condition, wherein the first reference signal corresponds to a first device identifier that identifies a second base station. The one or more instructions, when executed by the one or more processors of the first base station, may cause the one or more processors to: transmit a second reference signal after receiving the first reference signal as a response to receiving the first reference signal, wherein the second reference signal corresponds to a second device identifier that identifies the first base station.

[0020] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer readable media, user equipment, base stations, wireless communication devices, and processing systems as substantially described herein with reference to and as illustrated in the accompanying drawings and specification.

[0021] The foregoing has broadly outlined the features and technical advantages of examples according to the present disclosure in an effort to make the following detailed description better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples can be easily used as a basis for modifying or designing other structures for implementing the same purpose as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for illustration and description purposes and does not define limitations on the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a diagram illustrating an example of a wireless communication network.

[0023] Figure 2 is a diagram illustrating an example of a base station and a user equipment (UE) in communication in a wireless communication network.

[0024] Figure 3 is a diagram illustrating an example of a framework for RIM reference signal transmission.

[0025] Figure 4 is a diagram illustrating an example of a framework for RIM reference signal transmission.

[0026] Figure 5 is a diagram illustrating an example of a framework for RIM reference signal transmission.

[0027] Figure 6 is a flow chart of a wireless communication method.

[0028] Figure 7 is a flow chart of a wireless communication method.

[0029] Figure 8 is a conceptual data flow diagram illustrating the flow of data between different modules / devices / components in an example apparatus.

[0030] Fig. 9 is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system. DETAILED DESCRIPTION

[0031] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent configurations in which the concepts described herein may be practiced. This detailed description includes specific details to provide a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring such concepts.

[0032] Several aspects of telecommunication systems will now be presented with reference to various devices and methods. These devices 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 electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0033] As an example, an element, or any part of an element, or any combination of elements can be implemented with a "processing system" including one or more processors. Examples of processors include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout this disclosure. One or more processors in a processing system can execute software. Software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether it is described in software, firmware, middleware, microcode, hardware description languages, or other terms.

[0034] Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, these functions may be stored or encoded on a computer-readable medium as one or more instructions or codes. Computer-readable media include computer storage media. Storage media may be any available medium that can be accessed by a computer. As an example and not limitation, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), compact disk ROM (CD-ROM) or other optical disk storage, disk storage or other magnetic storage devices, a combination of the above-mentioned types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0035] Note that while various aspects may be described herein using terms commonly associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applied to communication systems based on other generations (such as 5G and later generations), including 5G technology.

[0036] Figure 1 1 is a diagram illustrating a network 100 in which various aspects of the present disclosure may be practiced. The network 100 may be an LTE network or some other wireless network, such as a 5G network. The wireless network 100 may include several BSs 110 (shown as BSs 110a, BSs 110b, BSs 110c, and BSs 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE) and may also be referred to as a base station, a 5G BS, a B node, a gNB, a 5G NB, an access point, a transmit receive point (TRP), and the like. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" may 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.

[0037] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown in , BS110a may be a macro BS for macro cell 102a, BS110b may be a pico BS for pico cell 102b, and BS110c may be a femto BS for femto cell 102c. The BS may support one or more (e.g., three) cells. The terms "eNB," "base station," "5G BS," "gNB," "TRP," "AP," "B node," "5G NB," and "cell" may be used interchangeably herein. In some cases, a first BS may interfere with a second BS outside the cell of the first BS, which may result in a remote interference condition.

[0038] In some examples, the cellular cells may not necessarily be stationary, and the geographic area of ​​the cellular cells may move according to the location of the mobile BS. In some examples, the BSs may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in access network 100 via various types of backhaul interfaces (such as direct physical connections, virtual networks, and / or the like using any suitable transport networks).

[0039] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in , a relay station 110d may communicate with a macro BS 110a and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0040] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0041] A network controller 130 may be coupled to a set of BSs and may provide coordination and control of these BSs. The network controller 130 may communicate with each BS via a backhaul. The BSs may also communicate with each other directly or indirectly, for example, via a wireless or wired backhaul.

[0042] UE 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. UE may also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE may 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, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle-mounted component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0043] Some UEs may be considered as machine type communication (MTC) UEs, 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., which may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity to or to a network (e.g., a wide area network, such as the Internet or a cellular network), for example, via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as client equipment (CPE). UE 120 may be included inside a housing that houses components of UE 120, such as a processor component, a memory component, etc.

[0044] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific RAT and may operate on one or more frequencies. RAT may also be referred to as radio technology, air interface, etc. Frequency may also be referred to as carrier, frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, 5G RAT networks may be deployed.

[0045] In some examples, access to the air interface may be scheduled, wherein a scheduling entity (e.g., a base station) allocates resources for communication among some or all devices and equipment within a service area or cell of the scheduling entity. Within the present disclosure, as further discussed below, a scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communications, the subordinate entities utilize resources allocated by the scheduling entity. In some aspects, the scheduling of access to the air interface may be adjusted to avoid conflicts between downlink transmissions of a first base station and uplink transmissions to a second base station, as may occur during interference conditions.

[0046] The base station is not the only entity that can act as a scheduling entity. That is, in some examples, a UE can act as a scheduling entity, thereby scheduling resources for one or more subordinate entities (e.g., one or more other UEs). In this example, the UE is acting as a scheduling entity, and other UEs use the resources scheduled by the UE for wireless communication. The UE can act as a scheduling entity in a peer-to-peer (P2P) network and / or in a mesh network. In the mesh network example, the UEs can optionally communicate directly with each other in addition to communicating with the scheduling entity.

[0047] Thus, in a wireless communication network having scheduled access to time-frequency resources and having a cellular configuration, a P2P configuration, and a mesh configuration, a scheduling entity and one or more subordinate entities may communicate using the scheduled resources.

[0048] As indicated above, Figure 1 These are provided as examples only. Other examples may differ from those described herein. Figure 1 Examples described.

[0049] Figure 2 It shows that it can be Figure 1 Block diagram 200 of a design of base station 110 and UE 120 for one of the base stations and one of the UEs in a wireless communication network. Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general T≥1 and R≥1.

[0050] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for the UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., CRS) and synchronization signals (e.g., primary synchronization signal (PSS) and secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and may provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t may be transmitted via T antennas 234a to 234t, respectively. According to various aspects described in more detail below, position coding may be used to generate synchronization signals to convey additional information. In some aspects, the base station 110 may configure communication parameters, such as the transmit angle, transmit power, etc. of the antenna 234, to avoid causing a remote interference condition to another base station 110. Similarly, the base station 110 may configure the gain value, reception angle, etc. of the antenna 234 to avoid interference caused by another base station 110 in an interference situation.

[0051] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations and may provide received signals to demodulators (DEMOD) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive (RX) processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. A channel processor may determine RSRP, RSSI, RSRQ, CQI, and the like.

[0052] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may 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, uplink signals from the UE 120 as well as other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236, if applicable, and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide decoded data to a data sink 239 and decoded control information to a controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0053] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component(s) of the base station 110 may perform one or more techniques associated with RIM reference signal transmission, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component(s) may perform or direct e.g. Figure 6 Method 600, Figure 7 The method 700 of , and / or other processes as described herein. Memories 242 and 282 may store data and program codes for use by BS 110 and UE 120, respectively. Scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.

[0054] As indicated above, Figure 2 These are provided as examples only. Other examples may differ from those described herein. Figure 2 Examples described.

[0055] 5G may refer to a radio configured to operate according to a new air interface (e.g., in addition to an air interface based on orthogonal frequency division multiple access (OFDMA)) or a fixed transport layer (e.g., in addition to the Internet Protocol (IP)). In various aspects, 5G may utilize OFDM with CP (referred to herein as cyclic prefix OFDM or CP-OFDM) and / or SC-FDM on the uplink, may utilize CP-OFDM on the downlink and include support for half-duplex operation using TDD. In various aspects, 5G may, for example, utilize OFDM with CP (referred to herein as CP-OFDM) and / or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) on the uplink, may utilize CP-OFDM on the downlink and include support for half-duplex operation using TDD. 5G may include enhanced mobile broadband (eMBB) services targeting wide bandwidth (e.g., 80 megahertz (MHz) and above), millimeter wave (mmW) targeting high carrier frequencies (e.g., 60 gigahertz (GHz)), massive MTC (mMTC) targeting non-backward compatible MTC technology, and / or mission critical services targeting ultra-reliable low latency communication (URLLC) services.

[0056] A single component carrier bandwidth of 100 MHZ may be supported. A 5G resource block may span 12 subcarriers with a subcarrier bandwidth of 75 kilohertz (kHz) over a duration of 0.1 ms. Each radio frame may include 50 subframes with a length of 10 ms. Thus, each subframe may have a length of 0.2 ms. Each subframe may indicate a link direction (e.g., DL or UL) for data transmission and the link direction for each subframe may be dynamically switched. Each subframe may include DL / UL data and DL / UL control data.

[0057] Beamforming can be supported and the beam direction can be dynamically configured. MIMO transmission with precoding can also be supported. MIMO configuration in DL can support up to 8 transmit antennas (multi-layer DL transmission with up to 8 streams) and up to 2 streams per UE. Multi-layer transmission with up to 2 streams per UE can be supported. Up to 8 serving cells can be used to support the aggregation of multiple cells. Alternatively, in addition to the OFDM-based interface, 5G can support different air interfaces. The 5G network may include entities such as a central unit or a distributed unit.

[0058] The RAN may include a central unit (CU) and a distributed unit (DU). A 5G BS (e.g., a gNB, a 5G Node B, a Node B, a Transmit Receiving Point (TRP), an Access Point (AP)) may correspond to one or more BSs. A 5G cell may be configured as an access cell (ACell) or a data-only cell (DCell). For example, the RAN (e.g., a central unit or a distributed unit) may configure these cells. A DCell may be a cell used for carrier aggregation or dual connectivity but not for initial access, cell selection / reselection, or switching. In some aspects, a DCell may not transmit a synchronization signal. In some aspects, a DCell may transmit a synchronization signal. A 5G BS may transmit a downlink signal indicating a cell type to a UE. Based at least in part on the cell type indication, the UE may communicate with the 5G BS. For example, a UE may determine, based at least in part on the indicated cell type, a 5G BS to be considered for cell selection, access, switching, and / or measurement.

[0059] Figure 3 is a diagram illustrating an example 300 of a framework for RIM reference signal transmission. Figure 3 As shown in , example 300 includes an attacker BS 110 and a victim BS 110 .

[0060] At 305 and 310, the victim BS 110 may receive a transmission affected by a long-range interference condition and may detect the long-range interference condition. For example, the aggressor BS 110 may transmit data to one or more UEs in a cell of the aggressor BS 110, which may cause interference to the victim BS 110. In other words, the aggressor BS 110 may cause a long-range interference condition to the victim BS 110. In this case, the victim BS 110 may determine that a long-range interference condition is occurring based at least in part on the transmission causing interference to the communications of the victim BS 110.

[0061] At 315, the attacker BS 110 may begin reference signal monitoring. For example, the attacker BS 110 may begin monitoring reference signal transmissions from the victim BS 110. In some aspects, the attacker BS 110 may monitor the reference signal after detecting a long-range interference condition. For example, the attacker BS 110 may begin monitoring a reference signal associated with a RIM request from the victim BS 110 based at least in part on the attacker BS 110 detecting a long-range interference condition. Alternatively, the attacker BS 110 may begin reference signal monitoring before detecting a long-range interference condition. For example, the attacker BS 110 may periodically monitor the reference signal without detecting a long-range interference condition in advance.

[0062] At 320, the victim BS 110 may transmit, and the attacker BS 110 may receive, a first reference signal (RS-1). The first reference signal may include an identifier of the victim BS 110. For example, the victim BS 110 may transmit a reference signal to the attacker BS 110 indicating that a remote interference condition is occurring. In this way, the victim BS 110 may trigger the attacker BS 110 to perform a RIM operation. In addition, the victim BS 110 may trigger the attacker BS 110 to transmit a reference signal in response. The response reference signal may enable the victim BS 110 to perform a RIM operation.

[0063] In some aspects, the victim BS 110 may include an explicit base station identifier in the first reference signal. For example, the victim BS 110 may include a complete base station identifier, a portion of a base station identifier, etc. in the first reference signal. In this way, the victim BS 110 ensures that the attacker BS 110 is enabled to determine the amount of interference attributed to the victim BS 110. In addition, the victim BS 110 enables the attacker BS 110 to distinguish the interference of the victim BS 110 from one or more other reference signals, such as from one or more other victim BSs or attacker BSs. In addition, the victim BS 110 enables the attacker BS 110 to select a RIM operation with improved efficacy relative to the RIM operation that does not identify the victim BS 110. For example, the victim BS 110 may enable the attacker BS 110 to identify the location of the victim BS 110 and select a RIM operation associated with using beamforming to direct the transmission signal away from the location of the victim BS 110.

[0064] In some aspects, the victim BS 110 may configure the first reference signal to implicitly identify the victim BS 110 (without explicitly identifying the victim BS 110). For example, the victim BS 110 may transmit the first reference signal using time resources, frequency resources, code division multiplexing (CDM) resources, etc. allocated to the victim BS 110. In this case, the attacker BS 110 may identify the victim BS 110 based at least in part on the time resources, frequency resources, CDM resources, etc. In some aspects, the victim BS 110 may use a combination of explicit identifiers and implicit identifiers to enable the attacker BS 110 to identify the victim BS 110. For example, the victim BS 110 may use frequency resources allocated to multiple BSs 110 and use a portion of the base station identifier to transmit the first reference signal. This may enable the attacker BS 110 to identify the victim BS 110 from the multiple BSs 110.

[0065] At 325, the attacker BS 110 may transmit, and the victim BS 110 may receive, a second reference signal (RS-2). The second reference signal may include an identifier of the attacker BS 110. In some aspects, the attacker BS 110 may transmit the second reference signal as a response to receiving the first reference signal from the victim BS 110. In this case, the second reference signal may be associated with information identifying the attacker BS 110, such as an explicit identifier, an implicit identifier, a combination of an explicit identifier and an implicit identifier, and the like.

[0066] In some aspects, the victim BS 110 may transmit multiple first reference signals and / or the attacker BS 110 may transmit multiple second reference signals. For example, the victim BS 110 may transmit a first version of the first reference signal that does not include identification information to trigger the attacker BS 110 to start monitoring the reference signal more extensively. In this case, the attacker BS 110 may increase the gain of the monitoring reference signal, increase the resource size monitored for the reference signal, interrupt the transmission to monitor the reference signal, etc. In addition, the victim BS 110 may transmit the second version of the first reference signal that does include identification information after transmitting the first version of the first reference signal. In this way, the attacker BS 110 can use a first shorter monitoring period and can be converted to use a second longer monitoring period. The first shorter monitoring period may not enable the attacker BS 110 to receive the base station identifier. The second longer monitoring period may enable the attacker BS 110 to receive the base station identifier. In this way, the victim BS 110 saves resources of the attacker BS 110. Similarly, the aggressor BS 110 may transmit multiple second reference signals or multiple versions of the second reference signal, thereby enabling continuous monitoring of the interference condition of the victim BS 110 .

[0067] At 330 and 335, the attacker BS 110 and / or the victim BS 110 may perform RIM operations. For example, the attacker BS 110 and the victim BS 110 may each perform RIM operations. In some aspects, the attacker BS 110 and the victim BS 110 may perform RIM operations based at least in part on the first reference signal and / or the second reference signal. In some aspects, the attacker BS 110 and the victim BS 110 may perform RIM operations based at least in part on identifying each other (e.g., using the first reference signal and the second reference signal).

[0068] In some aspects, in order to perform RIM operations, the attacker BS 110 may change transmission parameters. This may alleviate the long-range interference condition. For example, the attacker BS 110 may change the transmit power, transmit angle, transmit timing, etc. to alleviate the long-range interference condition. Similarly, the victim BS 110 may change the gain parameter, receive angle, transmit angle, receive timing, transmit timing, etc. to alleviate the long-range interference condition.

[0069] In some aspects, the victim BS 110 may communicate with the attacker BS 110 to cause the attacker BS 110 to reduce the transmit power by a specific amount. The victim BS 110 and / or the attacker BS 110 may determine the specific amount based at least in part on determining that the attacker BS 110 contributed a specific interference portion to the long-range interference condition. In this case, the victim BS 110 may reduce the amount that causes the attacker BS 110 to reduce the transmit power, thereby enabling the attacker BS 110 to transmit at a higher power than if the victim BS 110 could not identify the contribution of the attacker BS 110. This can improve network performance and reduce long-range interference.

[0070] In some aspects, the attacker BS 110 and the victim BS 110 may continue to transmit reference signals. For example, the victim BS 110 may detect that a long-range interference condition is still occurring after the RIM operation and may transmit another reference signal. Similarly, the attacker BS 110 may transmit another reference signal. In this case, the victim BS 110 and / or the attacker BS 110 may continue to perform RIM operations to mitigate the long-range interference condition.

[0071] At 340 and 345, the attacker BS 110 may restore the previous configuration and stop reference signal monitoring. For example, after not receiving a reference signal for a threshold amount of time, the attacker BS 110 may determine that a remote interference condition is no longer occurring. In this case, the attacker BS 110 may stop transmitting reference signals to the victim BS 110 and / or may stop monitoring reference signals from the victim BS 110. In addition, the attacker BS 110 (and / or the victim BS 110) may restore one or more communication parameters that were changed during RIM operation to restore earlier communication operation parameters. In some aspects, the attacker BS 110 (and / or the victim BS 110) may maintain one or more communication parameters that were changed during RIM operation to avoid the recurrence of the interference condition.

[0072] As indicated above, Figure 3 are provided as examples. Other examples are possible and may differ from the description of Figure 3 Examples described.

[0073] Figure 4 is a diagram illustrating an example 400 of a framework for RIM signaling.

[0074] At 405 and 410, the victim BS 110 may receive transmissions that are affected by the long-range interference condition. The victim BS 110 may detect the long-range interference condition based at least in part on receiving these transmissions. For example, the attacker BS 110 may transmit data to one or more UEs in the cell of the attacker BS 110. In this case, the transmissions of the attacker BS 110 may interfere with the communications of another cell in which the victim BS 110 is attempting to communicate. In other words, the attacker BS 110 may transmit information that interferes with the communications of the victim BS 110. In this case, the victim BS 110 may determine that a long-range interference condition is occurring.

[0075] At 415, 420, and 425, the victim BS 110 may begin reference signal monitoring. In addition, the victim BS 110 may transmit a first reference signal, and the attacker BS 110 may receive the first reference signal (RS-1). The first reference signal may include information identifying the victim BS 110. For example, the victim BS 110 may transmit the first reference signal to the attacker BS 110 to indicate to the attacker BS 110 that a remote interference condition is occurring. Additionally or alternatively, the victim BS 110 may transmit the first reference signal to trigger a RIM operation, trigger the attacker BS 110 to transmit a second reference signal in response, and the like.

[0076] At 430, the attacker BS 110 may transmit a backhaul notification to the victim BS 110. For example, the attacker BS 110 may transmit a backhaul notification to indicate that a first reference signal is detected. In some aspects, the attacker BS 110 may transmit a backhaul notification to provide information about the first reference signal. For example, the attacker BS 110 may provide information identifying an amount of interference detected at the attacker BS 110 based at least in part on the first reference signal. This may enable the victim BS 110 to perform RIM operations. In this way, the attacker BS 110 uses the backhaul connection to increase the reliability of the reported information about the first reference signal (relative to including the information in a message sent via the access connection).

[0077] At 435, the attacker BS 110 may transmit, and the victim BS 110 may receive, a second reference signal (RS-2). The second reference signal may include an identifier of the attacker BS 110. For example, in response to receiving the first reference signal from the victim BS 110, the attacker BS 110 may transmit the second reference signal to the victim BS 110. In this case, the second reference signal may include information identifying the attacker BS 110. In some aspects, the victim BS 110 may provide a response message, such as using a backhaul notification.

[0078] At 440 and 445, the attacker BS 110 and / or the victim BS 110 may perform RIM operations. For example, the attacker BS 110 and the victim BS 110 may perform RIM operations using information included in the first reference signal and / or the second reference signal. Additionally or alternatively, the victim BS 110 and / or the attacker BS 110 may perform RIM operations based at least in part on information identifying the victim BS 110 and the attacker BS 110 in the first reference signal and the second reference signal, respectively. In some aspects, in order to perform the RIM operations, the attacker BS 110 and / or the victim BS 110 may change communication parameters to mitigate the long-range interference condition.

[0079] At 450, 455 and 460, the victim BS 110 may stop transmitting reference signals to the attacker BS 110. In addition, the attacker BS 110 may stop reference signal monitoring and restore the previous transmission configuration. In addition, the attacker BS 110 may provide a notification to the victim BS 110. In this case, the attacker BS 110 may provide a notification via the backhaul to indicate that the reference signal was not detected within the threshold time period. In addition, the attacker BS 110 may provide a notification to indicate that the attacker BS 110 will restore the previous transmission configuration. In this way, the attacker BS 110 avoids prematurely stopping RIM operation (e.g., due to failure to receive a reference signal as a result of an interference condition) by using the backhaul to indicate whether the attacker BS 110 is to stop RIM operation. This can enable the victim BS 110 to confirm whether the interference condition no longer occurs.

[0080] As indicated above, Figure 4 are provided as examples. Other examples are possible and may differ from the description of Figure 4 Examples described.

[0081] Figure 5 is a diagram illustrating an example 500 of a framework for RIM reference signal transmission.

[0082] At 505 and 510, the victim BS 110 may receive transmissions that are affected by the long-range interference condition. In addition, the victim BS 110 may detect the long-range interference condition based at least in part on receiving these transmissions. For example, the attacker BS 110 may transmit data to one or more UEs in the cell of the attacker BS 110, and the transmissions of the attacker BS 110 may interfere with the communications of the victim BS 110. In this case, the victim BS 110 may determine that the long-range interference condition is occurring based at least in part on the communications that interfere with the communications of the victim BS 110.

[0083] At 515, 520, and 525, the victim BS 110 may start reference signal monitoring. In addition, the victim BS 110 may transmit a first reference signal. In addition, the attacker BS 110 may receive a first reference signal (RS-1). For example, the victim BS 110 may transmit the first reference signal to the attacker BS 110 to indicate to the attacker BS 110 that a remote interference condition is occurring. Additionally or alternatively, the victim BS 110 may transmit the first reference signal to trigger RIM operation, trigger the attacker BS 110 to transmit a second reference signal in response, and the like. In this case, the first reference signal may be associated with information identifying the victim BS 110, such as an explicit identifier, an implicit identifier, and the like.

[0084] At 530, the attacker BS 110 may transmit a backhaul notification to the victim BS 110. For example, the attacker BS 110 may transmit the backhaul notification to indicate that the first reference signal is detected. In some aspects, the attacker BS 110 may transmit the backhaul notification to provide information about the first reference signal. For example, the attacker BS 110 may provide information associated with the interference condition based at least in part on the first reference signal, such as an amount of interference detected at the attacker BS 110, which may enable the victim BS 110 to perform RIM operations.

[0085] At 535, the attacker BS 110 may transmit, and the victim BS 110 may receive, a second reference signal (RS-2). The second reference signal may include an identifier of the attacker BS 110. For example, the attacker BS 110 may transmit the second reference signal to the victim BS 110 based at least in part on receiving the first reference signal. In this case, the second reference signal may be associated with information identifying the attacker BS 110. In some aspects, the first reference signal and the second reference may convey identifiers identifying the respective transmitting BSs 110. For example, the attacker BS 110 may transmit the second reference signal to convey the identifier of the attacker BS 110, and the victim BS 110 may transmit the first reference signal to convey the identifier of the victim BS 110.

[0086] At 540, the victim BS 110 may transmit a backhaul RIM coordination message. For example, the victim BS 110 may transmit information identifying the result of the attacker BS 110 transmitting the second reference signal. In this case, the victim BS 110 may indicate the amount of interference attributed to the attacker BS 110. Additionally or alternatively, the victim BS 110 may transmit instructions for changing the communication configuration in conjunction with the RIM operation so that the attacker BS 110 can change the communication configuration. In some aspects, the attacker BS 110 may transmit a response message via the backhaul to indicate the RIM operation to be performed by the attacker BS 110. Additionally or alternatively, the attacker BS 110 may transmit a response message to confirm the receipt of the backhaul RIM coordination message. In this way, relative to the message transmitted using the access network transmission, the victim BS 110 improves the probability of success of the RIM operation relative to the non-coordinated RIM operation. In addition, the victim BS 110 improves the reliability of the RIM operation coordination relative to the message transmitted using the access network transmission.

[0087] At 545 and 550, the attacker BS 110 and / or the victim BS 110 may perform RIM operations. For example, using the first reference signal and the second reference signal, and based at least in part on information identifying the victim BS 110 and the attacker BS 110 in the first reference signal and the second reference signal, respectively, and the backhaul RIM coordination message, the attacker BS 110 and the victim BS 110 may perform RIM operations.

[0088] At 555, 560, and 565, the victim BS 110 may stop transmitting the reference signal to the attacker BS 110. In addition, the attacker BS 110 may stop the reference signal monitoring and restore the previous transmission configuration. . In addition, the attacker BS 110 may provide a backhaul notification to the victim BS 110. Additionally or alternatively, the attacker BS 110 may maintain the changed transmission configuration. In this case, the attacker BS 110 may provide a notification via the backhaul to indicate that the reference signal was not detected within a threshold time period, and the attacker BS 110 will restore the previous transmission configuration.

[0089] As indicated above, Figure 5 are provided as examples. Other examples are possible and may differ from the description of Figure 5 Examples described.

[0090] Figure 6 6 is a flow chart of a wireless communication method 600. The method may be performed by a first base station (BS) (eg, BS 110, aggressor BS 110, victim BS 110, equipment 802 / 802', base station 850, etc.).

[0091] At 610, in some aspects, the first base station may detect a long-range interference condition. For example, the first base station (e.g., using antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, etc.) may detect a long-range interference condition, as described in more detail above. In this case, the first base station may detect interference while in communication with, for example, a user equipment, and may be triggered to perform RIM operations.

[0092] At 620, the first base station may transmit a first reference signal. For example, the first base station (e.g., using the controller / processor 240, the transmit processor 220, the TX MIMO processor 230, the MOD 232, the antenna 234, etc.) may transmit the first reference signal based at least in part on the occurrence of a long-range interference condition, as described in more detail above. In some aspects, the first reference signal corresponds to a first device identifier (e.g., a base station identifier) ​​that identifies the first base station. In this way, the first base station (which may be a victim base station) may trigger a RIM operation for an aggressor base station, and may trigger the aggressor base station to transmit a second reference signal in response to enable the first base station to perform the RIM operation.

[0093] At 630, the first base station may receive a second reference signal. For example, the first base station (e.g., using antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, etc.) may receive the second reference signal after transmitting the first reference signal, as described in more detail above. In some aspects, the second reference signal corresponds to a second device identifier that identifies the second base station. In this way, the first base station may determine one or more parameter value changes as RIM operations to enable interference reduction.

[0094] At 640, in some aspects, the first base station may perform RIM operations. For example, the first base station (e.g., using antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, etc.) may perform RIM operations, as described in more detail above. In this case, the first base station may adjust a communication parameter value, may communicate with the second base station to cause the second base station to adjust a communication parameter value, and so on.

[0095] The method 600 may include additional aspects, such as any single aspect or any combination of aspects described below, and / or in conjunction with one or more other processes described elsewhere herein.

[0096] In a first aspect, a first base station is configured to perform a remote interference management operation based at least in part on a second reference signal.

[0097] In a second aspect, either alone or in combination with the first aspect, the first device identifier is at least a part of a base station identifier identifying the first base station.

[0098] In a third aspect, alone or in combination with one or more of the first to second aspects, the second device identifier is at least a portion of a base station identifier identifying the second base station.

[0099] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the configuration of the first reference signal corresponds to a first device identifier, and wherein the configuration of the first reference signal involves at least one of: a time resource allocated to the first reference signal, a frequency resource allocated to the first reference signal, or a code division multiplexing resource allocated to the first reference signal.

[0100] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the configuration of the second reference signal corresponds to a second device identifier, and wherein the configuration of the second reference signal is at least one of: a time resource allocated to the second reference signal, a frequency resource allocated to the second reference signal, or a code division multiplexing resource allocated to the second reference signal.

[0101] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, method 700 comprises determining at least one of the presence of long-range interference, an estimated number of interfered codewords, or an interference power estimate based at least in part on a second reference signal.

[0102] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, a first reference signal is generated based at least in part on a first device identifier.

[0103] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, a second reference signal is generated based at least in part on a second device identifier.

[0104] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the first base station is configured to transmit a third reference signal that does not include a device identifier.

[0105] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, the first base station is configured to receive a fourth reference signal that does not include a device identifier.

[0106] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the first base station is configured to receive a backhaul message indicating reception of the first reference signal from the second base station.

[0107] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the first base station is configured to receive a backhaul message from the second base station indicating that a threshold time period has elapsed since a last reference signal was received.

[0108] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the first base station is configured to end transmission of the reference signal based at least in part on detecting an end of the long-range interference condition.

[0109] although Figure 6 An example block of a wireless communication method is shown, but in some aspects, the method may include Figure 6 More boxes, fewer boxes, different boxes, or differently arranged boxes than those shown in FIG. Additionally or alternatively, Figure 6 Two or more blocks shown in may be executed in parallel.

[0110] Figure 7 7 is a flow chart of a wireless communication method 700. The method may be performed by a first base station (BS) (eg, BS 110, aggressor BS 110, victim BS 110, equipment 802 / 802', base station 850, etc.).

[0111] At 710, the first base station may receive a first reference signal. For example, the first base station (e.g., using antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, etc.) may receive a first reference signal associated with a long-range interference condition, as described in more detail above. In some aspects, the first reference signal corresponds to a first device identifier that identifies a second base station. In this case, the first base station may be triggered to transmit a second reference signal in response, and may be triggered to perform RIM operations in response to mitigate the long-range interference condition.

[0112] At 720, the first base station may transmit a second reference signal. For example, the BS (e.g., using the controller / processor 240, the transmit processor 220, the TX MIMO processor 230, the MOD 232, the antenna 234, etc.) may transmit the second reference signal after receiving the first reference signal as a response to receiving the first reference signal, as described in more detail above. In some aspects, the second reference signal corresponds to a second device identifier that identifies the first base station. In this case, the BS may include the second device identifier in the second reference signal to enable the second base station to determine the contribution of the first base station to the interference condition, thereby increasing the likelihood that the RIM operation successfully mitigates the interference condition.

[0113] At 730, in some aspects, the first base station may perform RIM operations. For example, the BS (e.g., using the controller / processor 240, the transmit processor 220, the TX MIMO processor 230, the MOD 232, the antenna 234, etc.) may perform RIM operations, as described in more detail above. In this case, the first base station may perform RIM operations based at least in part on measurements of the first reference signal, based at least in part on receiving information from the second base station (e.g., information associated with the second base station's measurements of the second reference signal), etc.

[0114] The method 700 may include additional aspects, such as any single aspect or any combination of aspects described below, and / or in conjunction with one or more other processes described elsewhere herein.

[0115] In a first aspect, a first base station is configured to perform a remote interference management operation based at least in part on a first reference signal.

[0116] In a second aspect, either alone or in combination with the first aspect, the first device identifier is at least a part of a base station identifier identifying the second base station.

[0117] In a third aspect, alone or in combination with any one of the first to second aspects, the second device identifier is at least a part of a base station identifier identifying the first base station.

[0118] In a fourth aspect, alone or in combination with any one of the first to third aspects, wherein the configuration of the first reference signal corresponds to a first device identifier, and wherein the configuration of the first reference signal is at least one of: a time resource allocated to the first reference signal, a frequency resource allocated to the first reference signal, or a code division multiplexing resource allocated to the first reference signal.

[0119] In a fifth aspect, either alone or in combination with any one of the first to fourth aspects, the configuration of the second reference signal corresponds to a second device identifier, and the configuration indicated by the second reference signal is at least one of: a time resource allocated to the second reference signal, a frequency resource allocated to the second reference signal, or a code division multiplexing resource allocated to the second reference signal.

[0120] In a sixth aspect, either alone or in combination with any of the first to fifth aspects, method 700 comprises determining at least one of the presence of long-range interference, an estimated number of interfered symbols, or an interference power estimate based at least in part on a second reference signal.

[0121] In a seventh aspect, alone or in combination with any one of the first to sixth aspects, a first reference signal is generated based at least in part on a first device identifier.

[0122] In an eighth aspect, alone or in combination with any one of the first to seventh aspects, a second reference signal is generated based at least in part on a second device identifier.

[0123] In a ninth aspect, alone or in combination with any one of the first to eighth aspects, the first base station is configured to transmit a third reference signal that does not include a device identifier.

[0124] In a tenth aspect, alone or in combination with any one of the first to ninth aspects, the first base station is configured to receive a third reference signal that does not include a device identifier.

[0125] In an eleventh aspect, alone or in combination with any one of the first to tenth aspects, the first base station is configured to transmit a backhaul message indicating reception of the first reference signal to the second base station.

[0126] In a twelfth aspect, alone or in combination with any one of the first to eleventh aspects, the first base station is configured to transmit a backhaul message to the second base station indicating that a threshold time period has elapsed since a last reference signal was received.

[0127] In a thirteenth aspect, alone or in combination with any one of the first to twelfth aspects, the first base station is configured to end transmission of the reference signal based at least in part on detecting an end of the long-range interference condition.

[0128] although Figure 7 An example block of a wireless communication method is shown, but in some aspects, the method may include Figure 7 More boxes, fewer boxes, different boxes, or differently arranged boxes than those shown in FIG. Additionally or alternatively, Figure 7 Two or more blocks shown in may be executed in parallel.

[0129] Figure 8 800 is a conceptual data flow diagram illustrating data flow between different modules / devices / components in an example apparatus 802. The apparatus 802 may be a base station. In some aspects, the apparatus 802 includes a receiving module 804, a detecting module 806, a determining module 808, and / or a transmitting module 810.

[0130] The receiving module 804 may receive information associated with the long-range interference from the base station 850 and as data 820. For example, the receiving module 804 may receive the data 820, which may indicate that a long-range interference condition occurs, such as based on the data 820 being incomplete and / or damaged. In some aspects, the receiving module 804 may receive a reference signal including an identifier of the base station 850, which may enable the equipment 802 to determine the contribution of the base station 850 to the long-range interference condition.

[0131] The detection module 806 may receive information associated with detecting the occurrence of a long-range interference condition from the reception module 804 and as data 822. For example, the detection module 806 may receive information identifying channel conditions, characteristics of data received by the reception module 804, etc. In this case, the detection module 806 may determine that a long-range interference condition is occurring and may trigger transmission of a reference signal to enable RIM operations to be performed by the equipment 802, the base station 850, etc.

[0132] The determination module 808 may receive information associated with determining communication characteristics from the reception module 804 and as data 826. For example, the determination module may determine the presence of long-range interference, an estimated number of interfered symbols, an interference power estimate, and the like.

[0133] The transmission module 810 may receive information associated with the occurrence of a remote interference condition from the detection module 806 and as data 824 and / or from the determination module 808 and as data 828. For example, the transmission module 810 may receive information indicating that a remote interference condition is occurring and may transmit data 830 to the base station 850, such as a reference signal including information identifying the equipment 802, instructions for performing RIM operations, an acknowledgement that the reception module 804 received the reference signal from the base station 850, and the like.

[0134] The equipment may include performing the aforementioned Figure 6 Method 600, Figure 7 The additional modules of each block of the algorithm in the method 700 and the like. Thus, the aforementioned Figure 6 Method 600, Figure 7 Each block in the method 700, etc. may be performed by a module, and the equipment may include one or more of those modules. Each module may be one or more hardware components specifically configured to implement the process / algorithm, implemented by a processor configured to execute the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0135] Figure 8 The number and arrangement of modules shown in FIG. 1 are provided as examples. In practice, there may be Figure 8 More modules, fewer modules, different modules, or differently arranged modules than those shown in FIG. Figure 8 Two or more modules shown in the figure may be implemented in a single module, or Figure 8 The single module shown in can be implemented as multiple distributed modules. Additionally or alternatively, Figure 8 The module collection (e.g., one or more modules) shown in Figure 8 Another module set shown in FIG. 1 performs one or more functions.

[0136] Fig. 9 is a diagram 900 illustrating an example of a hardware implementation for an apparatus 802' employing a processing system 902. The apparatus 802' may be a BS.

[0137] The processing system 902 may be implemented with a bus architecture generally represented by a bus 904. The bus 904 may include any number of interconnecting buses and bridges, depending on the specific application and overall design constraints of the processing system 902. The bus 904 links together various circuits including one or more processors and / or hardware modules (represented by the processor 906, modules 804, 806, 808, 810, and computer readable media / memory 908). The bus 904 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 further.

[0138] The processing system 902 may be coupled to a transceiver 910. The transceiver 910 is coupled to one or more antennas 912. The transceiver 910 provides a means for communicating with various other devices via a transmission medium. The transceiver 910 receives signals from one or more antennas 912, extracts information from the received signals, and provides the extracted information to the processing system 902 (specifically, the receiving module 804). In addition, the transceiver 910 receives information from the processing system 902 (specifically, the transmission module 810) and generates signals to be applied to one or more antennas 912 based at least in part on the received information. The processing system 902 includes a processor 906 coupled to a computer-readable medium / memory 908. The processor 906 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory 908. The software, when executed by the processor 906, causes the processing system 902 to perform the various functions described above for any particular device. The computer-readable medium / memory 908 may also be used to store data manipulated by the processor 906 when executing the software. The processing system further includes at least one of modules 804, 806, 808, and 810. The modules may be software modules running in the processor 906, software modules residing / stored in the computer-readable medium / memory 908, one or more hardware modules coupled to the processor 906, or some combination thereof. The processing system 902 may be a component of the BS 110 and may include the memory 242 and / or at least one of the following: the TX MIMO processor 230, the receive processor 238, and / or the controller / processor 240.

[0139] In some aspects, the apparatus 802 / 802' for wireless communication includes means for transmitting a first reference signal based at least in part on the occurrence of a remote interference condition, wherein the first reference signal corresponds to a first device identifier that identifies the apparatus 802 / 802'; means for receiving a second reference signal after transmitting the first reference signal, wherein the second reference signal corresponds to a second device identifier that identifies a base station; and so on. In some aspects, the apparatus 802 / 802' for wireless communication includes: means for receiving a first reference signal associated with a remote interference condition, wherein the first reference signal corresponds to a first device identifier that identifies a base station; means for transmitting a second reference signal as a response to receiving the first reference signal after receiving the first reference signal, wherein the second reference signal corresponds to a second device identifier that identifies the apparatus 802 / 802'; and so on. The aforementioned means may be one or more of the aforementioned modules of the apparatus 802 and / or the processing system 902 in the apparatus 802' configured to perform the functions described by the aforementioned means. As described above, the processing system 902 may include a TX MIMO processor 230, a receive processor 238, and / or a controller / processor 240. As such, in one configuration, the aforementioned means may be the TX MIMO processor 230, the receive processor 238, and / or the controller / processor 240 configured to perform the functions recited by the aforementioned means.

[0140] Fig. 9 are provided as examples. Other examples are possible and may differ from the combination Fig. 9 Examples described.

[0141] It should be understood that the specific order or hierarchy of the boxes in the disclosed process / flowchart is an illustration of an exemplary approach. Based on design preferences, it should be understood that the specific order or hierarchy of the boxes in these process / flowcharts can be rearranged. In addition, some boxes can be combined or omitted. The attached method claims present the elements of various boxes in an exemplary order and are not meant to be limited to the specific order or hierarchy presented.

[0142] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be easily understood by those skilled in the art, and the universal principles defined in this article can be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown in this article, but should be granted the full scope consistent with the claims in language, wherein the singular reference of the elements is not intended to represent "there is and only one", but "one or more", unless otherwise stated. The wording "exemplary" is used herein to mean "used as an example, instance or explanation". Any aspect described as "exemplary" herein does not have to be interpreted as being superior to or superior to other aspects. Unless otherwise stated, the term "some / certain" refers to one or more. Combinations such as "at least one of A, B or C", "at least one of A, B and C" and "A, B, C or any combination thereof" include any combination of A, B and / or C, and may include multiple A, multiple B or multiple C. Specifically, combinations such as "at least one of A, B, or C," "at least one of A, B, and C," and "A, B, C, or any combination thereof" may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, wherein any such combination may include one or more members of A, B, or C. All structural and functional equivalents of the elements of the various aspects described throughout this disclosure that are currently or later known to one of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is expressly recited in the claims. No claim element should be construed as a means-plus-function unless the element is expressly recited using the phrase "means for..."

Claims

1. A first apparatus for wireless communication at a network node, comprising: one or more memories; as well as one or more processors configured, based at least in part on information stored in the one or more memories, to: transmitting a first reference signal associated with an occurrence of a remote interference condition, wherein the first reference signal identifies the first apparatus based at least in part on a frequency resource of the first reference signal and a time resource of the first reference signal; as well as The first reference signal is transmitted and a second reference signal identifying the second device is received from the second device. 2 . The first device of claim 1 , wherein the one or more processors are further configured to stop transmitting the first reference signal after receiving the second reference signal.

3. The first device of claim 1, wherein the first device is a victim device of the remote jamming situation, and the second device is an attacker device of the remote jamming situation.

4. The first apparatus of claim 1, wherein the first reference signal is to trigger a long-range interference management action to mitigate the long-range interference condition. The first device of claim 1 , wherein the second reference signal comprises an identifier of the second device.

6. The first device of claim 1, wherein the one or more processors are further configured to receive a backhaul notification indicating an amount of interference associated with the remote interference condition detected by the second device after receiving the second reference signal and from the second device.

7. The first apparatus of claim 1, wherein the second reference signal is based at least in part on a remote interference management (RIM) operation associated with the second apparatus.

8. The first apparatus of claim 2, wherein the one or more processors are configured to stop transmitting the first reference signal after receiving the second reference signal based at least in part on the long-range interference condition no longer occurring.

9. A first apparatus for wireless communication at a network node, comprising: one or more memories; as well as one or more processors configured, based at least in part on information stored in the one or more memories, to: transmitting a reference signal associated with an occurrence of a remote interference condition, wherein the reference signal identifies the first device based at least in part on a frequency resource of the reference signal and a time resource of the reference signal; as well as After transmitting the reference signal and via a backhaul, a notification is received from a second device, wherein the notification includes information about the reference signal.

10. The first apparatus of claim 9, wherein the information is based at least in part on detection of the reference signal.

11. The first device of claim 9, wherein the one or more processors are further configured to stop transmitting the reference signal.

12. The first device of claim 9, wherein the first device is a victim device of the remote jamming situation, and the second device is an attacker device of the remote jamming situation.

13. The first apparatus of claim 9, wherein the reference signal is to trigger a long-range interference management action to mitigate the long-range interference condition.

14. A wireless communication method performed by a first device, comprising: transmitting a first reference signal associated with an occurrence of a remote interference condition, wherein the first reference signal identifies the first apparatus based at least in part on a frequency resource of the first reference signal and a time resource of the first reference signal; as well as The first reference signal is transmitted and a second reference signal identifying the second device is received from the second device.

15. The method of claim 14, further comprising: In response to receiving the second reference signal, transmission of the first reference signal is stopped.

16. The method of claim 14, wherein the first device is a victim device of the remote jamming situation and the second device is an attacker device of the remote jamming situation.

17. The method of claim 14, wherein the first reference signal triggers a long-range interference management action to mitigate the long-range interference condition.

18. A wireless communication method performed by a first device, comprising: transmitting a reference signal associated with an occurrence of a remote interference condition, wherein the reference signal identifies the first device based at least in part on a frequency resource of the reference signal and a time resource of the reference signal; as well as After transmitting the reference signal and via a backhaul, a notification is received from a second device, wherein the notification includes information about the reference signal.

19. The method of claim 18, wherein the information is based at least in part on detection of the reference signal.

20. The method of claim 18, further comprising: In response to receiving the notification, transmission of the reference signal is stopped.

21. The method of claim 18, wherein the first device is a victim device of the remote jamming situation and the second device is an attacker device of the remote jamming situation.

22. The method of claim 18, wherein the reference signal triggers a long-range interference management action to mitigate the long-range interference condition.

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