Cross-air interference coordination among base stations

Abstract

Methods, systems, and devices for wireless communications are described. In some systems, transmissions from neighboring base stations may interfere with downlink transmissions from a serving base station to a target user equipment (UE). In order to coordinate interference between base stations (e.g., to mitigate interference, stabilize interference, etc.), a serving base station may generate an interference coordination message and may transmit the message over the air (OTA) to one or more neighboring base stations. The message may include parameters indicating a coordination scheme for modifying one or more scheduling decisions by the neighboring base station(s). The coordination scheme may be configured or dynamically selected and may include interference beam fixing, interference beam suppression, or interference beam avoidance. When the serving base station is transmitting to a target UE, a neighboring base station receiving an OTA interference coordination message may modify a scheduling decision to mitigate or stabilize interference.

Description

[0001] Cross-references

[0002] This patent application claims the benefit of U.S. Provisional Patent Application No. 62 / 860,736, entitled “Over-The-Air Interference Coordination Among Base Stations,” filed by Park et al. on June 12, 2019, and U.S. Patent Application No. 16 / 893,270, entitled “Over-The-Air Interference Coordination Among Base Stations,” filed by Park et al. on June 4, 2020, each of which is assigned to the assignee of this application.

[0003] introduction

[0004] The following relates to wireless communications and, more particularly, to interference coordination.

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems), and fifth generation (5G) systems that may be referred to as new radio (NR) systems. These systems may use various technologies, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include several base stations or network access nodes, each of which simultaneously supports the communication of multiple communication devices, which may be referred to as user equipment (UE). Summary of the invention

[0006] A method for wireless communication at a first base station is described. The method may include: determining to transmit an interference coordination message based on a communication parameter of a UE served by the first base station. The method may also include: dynamically selecting an interference coordination scheme for at least a second base station based on the communication parameter. The method may further include: generating the interference coordination message based on the interference coordination scheme and a scheduling decision for the first base station. The method may also include: transmitting the generated interference coordination message to at least the second base station.

[0007] An apparatus for wireless communication at a first base station is described. The apparatus may include a processor and a memory coupled to the processor, the processor and the memory being configured to determine to transmit an interference coordination message based on a communication parameter of a UE served by the first base station. The processor and the memory may also be configured to dynamically select an interference coordination scheme for at least a second base station based on the communication parameter. The processor and the memory may further be configured to generate the interference coordination message based on the interference coordination scheme and a scheduling decision for the first base station. The processor and the memory may also be configured to transmit the generated interference coordination message to at least the second base station.

[0008] Another apparatus for wireless communication at a first base station is described. The apparatus may include means for determining to transmit an interference coordination message based on a communication parameter of a UE served by the first base station. The apparatus may also include means for dynamically selecting an interference coordination scheme for at least a second base station based on the communication parameter. The apparatus may further include means for generating the interference coordination message based on the interference coordination scheme and a scheduling decision for the first base station. The apparatus may also include means for transmitting the generated interference coordination message to at least the second base station.

[0009] A non-transitory computer-readable medium storing code for wireless communication at a first base station is described. The code may include instructions executable by a processor for determining to transmit an interference coordination message based on communication parameters of a UE served by the first base station. The code may also include instructions executable by the processor for dynamically selecting an interference coordination scheme for at least a second base station based on the communication parameters. The code may further include instructions executable by the processor for generating the interference coordination message based on the interference coordination scheme and a scheduling decision for the first base station. The code may also include instructions executable by the processor for transmitting the generated interference coordination message to at least a second base station.

[0010] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting the generated interference coordination message may include operations, features, means, or instructions for the following actions: broadcasting the generated interference coordination message to a set of base stations within a reception range of the first base station, the set of base stations including at least the second base station. In some other examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting the generated interference coordination message may include operations, features, means, or instructions for the following actions: unicasting the generated interference coordination message to a designated group of base stations including at least the second base station.

[0011] In some other examples of the methods, apparatuses (devices) and non-transitory computer-readable media described herein, generating an interference coordination message may include operations, features, apparatuses or instructions for the following actions: generating a payload of the interference coordination message based on an interference coordination scheme or a scheduling decision for the first base station or both. In some such examples, the payload includes: an indication of the interference coordination scheme, or a trigger for interference coordination, or a start time for interference coordination, or an end time for interference coordination, or a time duration for interference coordination, or a beam fixed time period for at least the second base station, or a frequency resource for transmission of the first base station, or a transmit power level of at least the second base station, or a transmit power reduction level of at least the second base station, or a UE priority value of the UE, or a data traffic priority value of the UE, or a cell identifier of the first base station, or a base station identifier of the first base station, or a transmit / receive point identifier of the first base station, or one or more beam indices, or a combination thereof.

[0012] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting the generated interference coordination message may include operations, features, means, or instructions for the following actions: transmitting the generated interference coordination message via a wireless backhaul link, or an uplink channel, or a downlink channel, or a combination thereof. In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the generated interference coordination message may be transmitted based on the duplex capability of the first base station, the duplex capability of the second base station, or both.

[0013] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, a communication parameter may be an example of a quality of service (QoS) level of a downlink transmission to a UE, and the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions for the following actions: identifying that the QoS level of the downlink transmission to the UE is greater than a threshold QoS level, wherein determining to transmit an interference coordination message may be based on the identification.

[0014] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the communication parameter may be an example of a priority value of a UE, and the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions for the following actions: identifying that the priority value of the UE is greater than a threshold priority value, wherein determining to transmit an interference coordination message may be based on the identification.

[0015] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the communication parameter may be an example of a signal to interference ratio (SIR) or a signal to interference plus noise ratio (SINR) or both of the UE. In some such examples, the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for the following actions: identifying that the SIR or SINR or both of the UE are less than one or more thresholds, wherein determining to transmit the interference coordination message may be based on the identification.

[0016] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the communication parameter may be an example of location information of the UE, and the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions for the following actions: identifying, based on the location information, that the distance of the UE from the first base station is greater than a threshold distance, wherein determining that an interference coordination message is to be transmitted may be based on the identification.

[0017] Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for communicating with the UE according to the scheduling decision.

[0018] A method for wireless communication at a device in a wireless network is described. The method may include determining a communication parameter of a UE served by a serving base station or a communication parameter of the serving base station or both. The method may also include dynamically selecting an interference coordination scheme for the serving base station and one or more neighboring base stations based on the communication parameter. The method may further include transmitting an indication of the dynamically selected interference coordination scheme to the base station.

[0019] An apparatus for wireless communication at a device in a wireless network is described. The apparatus may include a processor and a memory coupled to the processor, the processor and the memory being configured to: determine a communication parameter of a UE served by a serving base station or a communication parameter of the serving base station or a communication parameter of both. The processor and the memory may also be configured to: dynamically select an interference coordination scheme for the serving base station and one or more neighboring base stations based on the communication parameters. The processor and the memory may further be configured to: transmit an indication of the dynamically selected interference coordination scheme to the base station.

[0020] Another apparatus for wireless communication at a device in a wireless network is described. The apparatus may include: means for determining a communication parameter of a UE served by a serving base station or a communication parameter of a serving base station or both. The apparatus may also include: means for dynamically selecting an interference coordination scheme for a serving base station and one or more neighboring base stations based on the communication parameters. The apparatus may further include: means for transmitting an indication of the dynamically selected interference coordination scheme to a base station.

[0021] A non-transitory computer-readable medium storing code for wireless communication at a device in a wireless network is described. The code may include instructions executable by a processor for the following operations: determining a communication parameter of a UE served by a serving base station or a communication parameter of the serving base station or a communication parameter of both. The code may also include instructions executable by the processor for the following operations: dynamically selecting an interference coordination scheme for the serving base station and one or more neighboring base stations based on the communication parameter. The code may further include instructions executable by the processor for the following operations: transmitting an indication of the dynamically selected interference coordination scheme to the base station.

[0022] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the dynamically selected interference coordination scheme may be an example of an interference beam fixing scheme, and transmitting an indication of the dynamically selected interference coordination scheme may include operations, features, apparatus, or instructions for the following actions: transmitting an indication of a beam fixing time interval or a beam fixing periodicity or both of the interference beam fixing scheme.

[0023] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the dynamically selected interference coordination scheme may be an example of an interference beam suppression scheme, and transmitting an indication of the dynamically selected interference coordination scheme may include operations, features, apparatus, or instructions for the following actions: transmitting an indication of a transmit power level or a transmit power reduction level or both for the interference beam suppression scheme.

[0024] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the dynamically selected interference coordination scheme may be an example of an interference beam avoidance scheme, and transmitting an indication of the dynamically selected interference coordination scheme may include operations, features, apparatus, or instructions for the following actions: transmitting an indication of one or more beam indices to be avoided by the interference beam avoidance scheme.

[0025] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, transmitting an indication of a dynamically selected interference coordination scheme may include operations, features, apparatus, or instructions for the following actions: transmitting an indication of whether to implement the dynamically selected interference coordination scheme, or a start time for implementing the dynamically selected interference coordination scheme, or an end time for implementing the dynamically selected interference coordination scheme, or a combination thereof.

[0026] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the communication parameters include the QoS level of downlink transmission from a serving base station to a UE, or a priority value of the UE, or the SIR of the UE, or the SINR of the UE, or location information of the UE relative to the serving base station, or a combination thereof.

[0027] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, a device in a wireless network may be an example of a network entity and a base station may be an example of a serving base station, and determining communication parameters may include operations, features, apparatus, or instructions for receiving communication parameters from a serving base station.

[0028] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, a device in a wireless network may be an example of a serving base station and transmitting an indication of a dynamically selected interference coordination scheme to a base station may include operations, features, apparatus, or instructions for the following actions: transmitting an interference coordination message to one or more neighboring base stations, wherein a payload of the interference coordination message may be based on the dynamically selected interference coordination scheme.

[0029] A method for wireless communication at a first base station is described. The method may include: receiving an interference coordination message from a second base station. The method may also include: determining a dynamically selected interference coordination scheme based on the interference coordination message. The method may also include: modifying a scheduling decision based on the dynamically selected interference coordination scheme. The method may further include: communicating with one or more UEs based on the modified scheduling decision.

[0030] An apparatus for wireless communication at a first base station is described. The apparatus may include a processor and a memory coupled to the processor, the processor and the memory being configured to receive an interference coordination message from a second base station. The processor and the memory may also be configured to determine a dynamically selected interference coordination scheme based on the interference coordination message. The processor and the memory may also be configured to modify a scheduling decision based on the dynamically selected interference coordination scheme. The processor and the memory may further be configured to communicate with one or more UEs based on the modified scheduling decision.

[0031] Another apparatus for wireless communication at a first base station is described. The apparatus may include means for receiving an interference coordination message from a second base station. The apparatus may also include means for determining a dynamically selected interference coordination scheme based on the interference coordination message. The apparatus may also include means for modifying a scheduling decision based on the dynamically selected interference coordination scheme. The apparatus may further include means for communicating with one or more UEs based on the modified scheduling decision.

[0032] A non-transitory computer-readable medium storing code for wireless communication at a first base station is described. The code may include instructions executable by a processor for the following operations: receiving an interference coordination message from a second base station. The code may also include instructions executable by the processor for the following operations: determining a dynamically selected interference coordination scheme based on the interference coordination message. The code may also include instructions executable by the processor for the following operations: modifying a scheduling decision based on the dynamically selected interference coordination scheme. The code may further include instructions executable by the processor for the following operations: communicating with one or more UEs according to the modified scheduling decision.

[0033] Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: determining an interference coordination scheme based on the interference coordination message, wherein the scheduling decision may be modified based on the interference coordination scheme.

[0034] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the interference coordination scheme may be an example of an interference beam fixing scheme, and modifying the scheduling decision may include operations, features, devices, or instructions for the following actions: based on the beam fixing time interval or beam fixing periodicity or both indicated by the interference coordination message, operating using each communication beam in the communication beam set within a configured number of transmission time intervals (TTIs). In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the communication beam set includes a subset of the communication beam set operated by the first base station.

[0035] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the interference coordination scheme may be an example of an interference beam suppression scheme, and modifying the scheduling decision may include operations, features, apparatus, or instructions for modifying the transmit power of a communication beam set based on a second scheduling decision for a second base station.

[0036] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, modifying the transmit power of a communication beam set may include operations, features, apparatus, or instructions for reducing the transmit power of a communication beam set to zero, or to a transmit power level indicated by an interference coordination message, or to a transmit power reduction level indicated by an interference coordination message based on an interference coordination scheme.

[0037] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, modifying the transmit power of a communication beam set may include operations, features, apparatus, or instructions for the following actions: determining, based on a second scheduling decision, one or more TTIs in which a second base station can be scheduled to transmit to a specific UE, wherein the transmit power of the communication beam set can be modified in the one or more TTIs.

[0038] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the set of communication beams includes a subset of the set of communication beams operated by the first base station.

[0039] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the interference coordination scheme may be an example of an interference beam avoidance scheme, and modifying the scheduling decision may include operations, features, apparatus, or instructions for suppressing operation using a communication beam set based on a second scheduling decision for a second base station.

[0040] Some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein may further include operations, features, apparatus or instructions for the following actions: determining a communication beam set based on a cellular cell identifier of a second base station indicated by an interference coordination message, or a base station identifier of a second base station, or a transmit / receive point identifier of a second base station, or one or more beam indices, or a combination thereof.

[0041] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, suppressing operation using a communication beam set may include operations, features, means, or instructions for the following actions: determining one or more TTIs in which a second base station may be scheduled to transmit to a specific UE based on a second scheduling decision. In some such examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, operations, features, means, or instructions for the following actions may further include: operating using a second communication beam set different from the communication beam set in the one or more TTIs.

[0042] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the set of communication beams includes a subset of the set of communication beams operated by the first base station.

[0043] In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, receiving an interference coordination message may include operations, features, apparatus, or instructions for the following actions: receiving the interference coordination message via a wireless backhaul link, or an uplink channel, or a downlink channel, or a combination thereof.

[0044] A method for wireless communication at a UE is described. The method may include: receiving a message from a serving base station, the message including an indication of a dynamically selected interference coordination scheme and an indication of a scheduling decision. The method may also include: transmitting an interference coordination message indicating the dynamically selected interference coordination scheme and the scheduling decision to at least a neighboring base station. The method may further include: communicating with the serving base station based on the scheduling decision.

[0045] An apparatus for wireless communication at a UE is described. The apparatus may include a processor and a memory coupled to the processor, the processor and the memory being configured to: receive a message from a serving base station, the message including an indication of a dynamically selected interference coordination scheme and an indication of a scheduling decision. The processor and the memory may be further configured to: transmit an interference coordination message indicating the dynamically selected interference coordination scheme and the scheduling decision to at least a neighboring base station. The processor and the memory may also be configured to: communicate with the serving base station based on the scheduling decision.

[0046] Another apparatus for wireless communication at a UE is described. The apparatus may include: means for receiving a message from a serving base station, the message including an indication of a dynamically selected interference coordination scheme and an indication of a scheduling decision. The apparatus may also include: means for transmitting an interference coordination message indicating the dynamically selected interference coordination scheme and the scheduling decision to at least a neighboring base station. The apparatus may further include: means for communicating with the serving base station based on the scheduling decision.

[0047] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor for the following operations: receiving a message from a serving base station, the message including an indication of a dynamically selected interference coordination scheme and an indication of a scheduling decision. The code may also include instructions executable by the processor for the following operations: transmitting an interference coordination message indicating the dynamically selected interference coordination scheme and the scheduling decision to at least a neighboring base station. The code may further include instructions executable by the processor for the following operations: communicating with the serving base station based on the scheduling decision.

[0048] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, operations, features, means, or instructions for the following actions may be further included: interference greater than a threshold interference level from a neighboring base station is detected. In some such examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, operations, features, means, or instructions for the following actions may be further included: transmitting an interference message indicating the detected interference to a serving base station, wherein receiving the message from the serving base station is based on transmitting the interference message.

[0049] In some examples of the methods, apparatus (devices) and non-transitory computer-readable media described herein, receiving the message from the serving base station may include operations, features, apparatuses or instructions for the following actions: receiving downlink control information (DCI) from the serving base station notifying the UE to transmit an interference coordination message to at least a neighboring base station, wherein transmitting the interference coordination message is based on the DCI.

[0050] In some examples of methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving the message from the serving base station may include operations, features, means, or instructions for: receiving the interference coordination message from the serving base station. In some such examples of methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the interference coordination message may include operations, features, means, or instructions for: relaying the interference coordination message from the serving base station to at least the neighboring base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 and 2

[0013] An example of a wireless communication system supporting over-the-air (OTA) interference coordination among base stations in accordance with one or more aspects of the present disclosure is illustrated.

[0053] Figure 3A , 3B , 3C illustrate an example of a scheduling decision supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure.

[0054] Figure 4 An example of a process flow supporting OTA interference coordination among base stations in accordance with one or more aspects of the present disclosure is illustrated.

[0055] Figure 5 and 6 A block diagram of an apparatus supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is shown.

[0056] Figure 7 A block diagram of a communication manager supporting OTA interference coordination among base stations is shown in accordance with one or more aspects of the present disclosure.

[0057] Figure 8 A diagram of a system including a device supporting OTA interference coordination among base stations is shown in accordance with one or more aspects of the present disclosure.

[0058] Fig. 9 and 10 A block diagram of an apparatus supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is shown.

[0059] Fig.11 A block diagram of a communication manager supporting OTA interference coordination among base stations is shown in accordance with one or more aspects of the present disclosure.

[0060] Fig.12 A diagram of a system including a device supporting OTA interference coordination among base stations is shown in accordance with one or more aspects of the present disclosure.

[0061] Figures 13 to 16 A flow chart illustrating a method of supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is shown.

[0062] Detailed Description

[0063] In a wireless communication system implementing beamforming, a base station may make a scheduling decision to determine how to communicate in different TTIs. For example, a base station may determine the UE to communicate with and the communication beam used for communication in each TTI (e.g., corresponding to a specific beam index). In some implementations, different base stations in the system may perform independent scheduling (e.g., without coordination), wherein the scheduling decision of the first base station is independent of the scheduling decision of the second base station. Such independent scheduling may result in interference between scheduled communications. For example, two base stations may transmit to UEs that are physically adjacent to each other concurrently so that each UE may experience interference from a transmission sent to another UE. In some other implementations, the base stations in the system may be scheduled by a centralized scheduler in a coordinated joint scheduling process, wherein the base stations are connected (e.g., connected to each other via a centralized scheduler, etc.) via an ideal backhaul link (i.e., a backhaul link with zero or negligible delay, such as a wired backhaul link or a fiber access backhaul link). However, in some systems, one or more base stations may be connected via a non-ideal backhaul link (e.g., a backhaul link involving some delays in communication, such as a wireless backhaul link).

[0064] If a base station in the system is connected via a non-ideal backhaul link (or is not connected via a backhaul link), the base station may transmit coordination information OTA. For example, the base station may implement OTA interference coordination messaging to coordinate scheduling decisions and mitigate and / or stabilize interference. The base station serving the UE may determine to transmit an interference coordination message to one or more neighboring base stations based on one or more communication parameters for the UE. The base station may generate an interference coordination message and may transmit the interference coordination message to the one or more neighboring base stations. The neighboring base station receiving the message may modify the scheduling decision to mitigate and / or stabilize the interference during the TTI during which the serving base station transmits to the UE. Modifying scheduling based on OTA interference coordination may support improved reliability of transmissions from the serving base station to the UE.

[0065] In some cases, the interference coordination message may indicate an interference coordination scheme. In some implementations, the serving base station may be configured with a static scheme for coordination. In other implementations, the serving base station or a network device communicating with the serving base station may dynamically select a scheme from a set of supported schemes for coordination. In a first example, the coordination scheme may be a beam fixing scheme. In beam fixing, the base station may suppress switching of communication beams in a configured time interval to stabilize interference and support improved rate control. In a second example, the coordination scheme may be a beam suppression scheme. In beam suppression, when the serving base station is transmitting to the target UE, the neighboring base station may suppress transmission (or reduce transmit power) during the TTI, thereby alleviating interference to the target UE. In a third example, the coordination scheme may be a beam avoidance scheme. In beam avoidance, the neighboring base station may avoid transmitting on one or more specific communication beams (e.g., transmit beams) based on the communication beam being used by the serving base station in each TTI. The beam avoidance scheme may alleviate interference to UEs in the system.

[0066] Various aspects of the present disclosure are initially described in the context of wireless communication systems. Additional aspects of the present disclosure are described with reference to scheduling decisions and process flows. Various aspects of the present disclosure are further illustrated and described by and with reference to apparatus diagrams, system diagrams, and flow charts related to OTA interference coordination among base stations.

[0067] Figure 1An example of a wireless communication system 100 supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is illustrated. The wireless communication system 100 may include a base station 105, a UE 115, and a core network 130. In some examples, the wireless communication system 100 may be an LTE network, an LTE-A network, an LTE-A Pro network, or an NR network. In some cases, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

[0068] The base stations 105 may be dispersed throughout a geographic area to form the wireless communication system 100, and may be different forms of devices or devices with different capabilities. The base stations 105 and the UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which the UEs 115 and the base stations 105 may establish communication links 125. The coverage area 110 may be an example of a geographic area over which the base stations 105 and the UEs 115 support signal communication according to one or more radio access technologies.

[0069] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile, or stationary and mobile at different times. The UEs 115 may be different forms of devices or devices with different capabilities. Figure 1 Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, base stations 105, and / or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), such as Figure 1 shown.

[0070] Each base station 105 may communicate with the core network 130 or with each other or both. For example, the base station 105 may interface with the core network 130 via a backhaul link 120 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105) or indirectly (e.g., via the core network 130), or directly and indirectly on the backhaul link 120 (e.g., via X2, Xn, or other interfaces). In some examples, the backhaul link 120 may be or include one or more wireless links. In some cases, the UE 115 may communicate with the core network 130 via a communication link 155.

[0071] The one or more base stations 105 described herein may include or may be referred to by one of ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a B node, an evolved B node (eNB), a next generation B node or a gigabit B node (any of which may be referred to as a gNB), a home B node, a home evolved B node, or other suitable terminology.

[0072] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable term, where a "device" may also be referred to as a unit, a station, a terminal, or a client, etc. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, a machine type communication (MTC) device, etc., which may be implemented in various objects such as appliances, vehicles, meters, etc.

[0073] The UE 115 described herein may be able to communicate with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as base stations 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, relay base stations, etc. Figure 1 shown.

[0074] The UE 115 and the base station 105 may communicate wirelessly with each other via one or more communication links 125 on one or more carriers. The term "carrier" may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth portion (BWP)) that operates according to a physical layer channel for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operations, user data, or other signaling. The wireless communication system 100 may support communication with the UE 115 using carrier aggregation or multi-carrier operation. The UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used in conjunction with frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0075] The signal waveform transmitted on the carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system using MCM technology, a resource element may include a code element period (e.g., the duration of a modulation code element) and a subcarrier, where the code element period and the subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Thus, the more resource elements received by UE 115 and the higher the order of the modulation scheme, the higher the data rate of UE 115 can be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers can further improve the data rate or data integrity of communication with UE 115.

[0076] The time interval of the base station 105 or the UE 115 can be expressed as a multiple of a basic time unit, and the basic time unit can be, for example, a sampling period T S =1 / (Δf 最大 ·N f ) seconds, where Δf 最大 It can represent the maximum supported subcarrier spacing, and N f The maximum supported discrete Fourier transform (DFT) size may be indicated. Time intervals of communication resources may be organized according to radio frames, each having a specific duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0077] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some cases, a frame may be divided into subframes, and each subframe may be further divided into a plurality of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a number of code element periods (e.g., depending on the length of the cyclic prefix added before each code element period). In some wireless communication systems 100, a time slot may be further divided into a plurality of mini-time slots containing one or more code elements. Excluding the cyclic prefix, each code element period may contain one or more (e.g., N f ) sampling period. The duration of a symbol period may depend on the subcarrier spacing or the operating band.

[0078] A subframe, a time slot, a mini-time slot, or a symbol may be the minimum scheduling unit of the wireless communication system 100 and may be referred to as a TTI. In some cases, the TTI duration (i.e., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the minimum scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0079] Physical channels may be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels may be multiplexed on a downlink carrier, for example, using a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a number of symbol periods and may extend across a system bandwidth or a subset of a system bandwidth of a carrier. One or more control regions (e.g., CORESETs) may be configured for a UE 115. For example, a UE 115 may monitor or search a control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for sending control information to multiple UEs 115 and a UE-specific search space set for sending control information to a specific UE 115 .

[0080] Each base station 105 may provide communication coverage via one or more cells (e.g., macro cells, small cells, hot spots, or other types of cells, or various combinations thereof). The term "cell" may refer to a logical communication entity used to communicate with a base station 105 (e.g., on a carrier), and may be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or other) used to distinguish adjacent cells. In some examples, a cell may also refer to a geographic coverage area 110 or a portion of a geographic coverage area 110 (e.g., a sector) on which a logical communication entity operates. The range of such a cell may range from a smaller area (e.g., a structure, a subset of a structure) to a larger area depending on various factors (such as the capabilities of the base station 105). For example, a cell may be or include a building, a subset of a building, an external space between or overlapping geographic coverage areas 110, and the like.

[0081] A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access to UEs 115 that have service subscriptions with a network provider that supports the macro cell. A small cell may be associated with a lower power base station 105 (compared to a macro cell), and the small cell may operate in the same or different (e.g., licensed, unlicensed) frequency band as the macro cell. A small cell may provide unrestricted access to UEs 115 that have service subscriptions with a network provider, or may provide restricted access to UEs 115 associated with the small cell (e.g., UEs 115 in a closed subscriber group (CSG), UEs 115 associated with users in a home or office, etc.). A base station 105 may support one or more cells and may also support communications on one or more cells using one or more component carriers.

[0082] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB), or others) that may provide access to different types of devices.

[0083] In some examples, base stations 105 may be mobile and thus provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, and the different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.

[0084] The wireless communication system 100 may be configured to support ultra-reliable communication or low latency communication or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low latency communication (URLLC) or mission-critical communication. UE 115 may be designed to support ultra-reliable, low latency or critical functions (e.g., mission-critical functions). Ultra-reliable communication may include private communication or group communication, and may be supported by one or more mission-critical services (such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions may include prioritization of services, and mission-critical services may be used for public safety or general commercial applications. The terms ultra-reliable, low latency, critical mission, and ultra-reliable low latency may be used interchangeably herein.

[0085] In some cases, UE 115 may also be able to communicate directly with other UE 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communication may be within a geographic coverage area 110 of a base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of the base station 105, or may not be able to receive transmissions from the base station 105 for other reasons. In some cases, each group of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, wherein each UE 115 transmits to each other UE 115 in the group. In some examples, the base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between each UE 115 without involving the base station 105.

[0086] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, the vehicles can communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these communications. The vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some cases, vehicles in the V2X system can communicate with roadside infrastructure (such as roadside units), or with the network, or both, using vehicle-to-everything (V2N) communications via one or more network nodes (e.g., base station 105).

[0087] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), and the EPC or 5GC may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) for managing access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), a user plane function (UPF)) for routing or interconnecting packets to an external network. The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of UE 115 served by a base station 105 associated with the core network 130. User IP packets may be delivered via a user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to a network operator IP service 150. Operator IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0088] Some network devices (such as base stations 105) may include subcomponents, such as access network entities 140, which may be examples of access node controllers (ANCs). Each access network entity 140 may communicate with each UE 115 through several other access network transport entities 145, which may be referred to as radio heads, smart radio heads, or transmission / reception points (TRPs). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or merged into a single network device (e.g., base station 105).

[0089] The wireless communication system 100 may operate using one or more frequency bands, sometimes in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). The 300 MHz to 3 GHz region may be referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from about 1 decimeter to 1 meter long. UHF waves may be blocked or redirected by buildings and environmental features, but these waves may penetrate various structures sufficiently for macro cells to provide service to UEs 115 located indoors. Transmissions using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) than transmissions using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0090] The electromagnetic spectrum is typically subdivided into various classes, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). Frequencies between FR1 and FR2 are typically referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is typically (interchangeably) referred to as the “sub-6 GHz” band in various documents and articles. Similar naming issues sometimes arise regarding FR2, although unlike the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as the “millimeter wave” band by the International Telecommunication Union (ITU), FR2 is typically (interchangeably) referred to as the “millimeter wave” band in various documents and articles.

[0091] In view of the above aspects, unless otherwise specifically stated, it should be understood that if used in this article, the term "sub-6 GHz" and the like can broadly represent frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise specifically stated, it should be understood that if used in this article, the term "millimeter wave" and the like can broadly represent frequencies that can include mid-band frequencies, can be within FR2, or can be within the EHF band.

[0092] The wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ licensed assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band (such as the 5 GHz Industrial, Scientific, and Medical (ISM) band). When operating in an unlicensed radio frequency spectrum band, devices (such as base stations 105 and UEs 115) may employ carrier sensing for collision detection and avoidance. In some cases, operations in an unlicensed band may be based on a carrier aggregation configuration (e.g., LAA) in coordination with component carriers operating in a licensed band. Operations in an unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, D2D transmissions, and the like.

[0093] The base station 105 or UE 115 may be equipped with multiple antennas, which can be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the base station 105 or UE 115 may be located in one or more antenna arrays or antenna panels that can support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly (such as an antenna tower). In some cases, the antennas or antenna arrays associated with the base station 105 may be located at different geographical locations. The base station 105 may have an antenna array having antenna ports of several rows and columns that the base station 105 can use to support beamforming for communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0094] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105 or a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals communicated via antenna elements of an antenna array so that some signals propagating at a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals communicated via antenna elements may include the transmitting device or the receiving device applying certain amplitude offsets, phase offsets, or both to signals carried via antenna elements associated with the device. Adjustments associated with each antenna element may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0095] The base station 105 or the UE 115 may use beam sweeping techniques as part of a beamforming operation. For example, the base station 105 may use multiple antennas or antenna arrays (e.g., antenna planes) to perform beamforming operations for directional communication with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by the base station 105 in different directions. For example, the base station 105 may transmit signals according to different sets of beamforming weights associated with different transmission directions. Transmissions in different beam directions may be used (e.g., by a transmitting device (such as, the base station 105) or a receiving device (such as, the UE 115)) to identify a beam direction used by the base station 105 for subsequent transmission and / or reception.

[0096] Some signals, such as data signals associated with a particular recipient device, may be transmitted by base station 105 in a single beam direction, e.g., a direction associated with a recipient device, such as UE 115. In some examples, a beam direction associated with transmissions along a single beam direction may be determined based on signals transmitted in different beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions and may report to base station 105 an indication of the signal received by UE 115 with the highest signal quality or other acceptable signal quality.

[0097] In some cases, transmission by a device (e.g., by a base station 105 or a UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from the base station 105 to the UE 105). The UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to the configured number of beams across the system bandwidth or one or more subbands. The base station 105 may transmit reference signals (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)) that may be precoded or uncoded. The UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-faceted type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals transmitted by base station 105 in one or more directions, UE 115 may use similar techniques to transmit signals multiple times in different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115) or to transmit signals in a single direction (e.g., to transmit data to a receiving device).

[0098] A receiving device (e.g., UE 115) may try multiple reception configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from a base station 105. For example, the receiving device may try multiple reception directions by receiving via different antenna subarrays, processing received signals according to different antenna subarrays, receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as "listening" according to different reception configurations or reception directions. In some examples, the receiving device may use a single reception configuration to receive along a single beam direction (e.g., when receiving a data signal). The single reception configuration may be aligned on a beam direction determined based on listening according to different reception configuration directions (e.g., a beam direction determined to have the highest signal strength, the highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0099] In some wireless communication systems 100, transmissions from neighboring base stations 105 may interfere with downlink transmissions from the serving base station 105 to the target UE 115. In order to coordinate interference between base stations 105 (e.g., to mitigate interference, stabilize interference, etc.), the communication manager 101 of the serving base station 105 may generate an interference coordination message and may transmit the interference coordination message to one or more neighboring base stations 105. The serving base station 105 may transmit the message on the wireless backhaul link 120, on an uplink channel, or on a downlink channel. The message may include parameters indicating a coordination scheme used by the neighboring base station 105 to modify one or more scheduling decisions. The coordination scheme may be configured or dynamically selected and may include interference beam fixation, interference beam suppression, or interference beam avoidance. For example, the serving base station 105 (e.g., using the communication manager 101) or the network device (e.g., using the communication manager 102) may dynamically select an interference coordination scheme based on communication parameters of the serving base station 105, the target UE 115, or both. Neighboring base stations 105 that receive the OTA interference coordination message using the communication manager 101 may modify scheduling decisions to mitigate or stabilize interference when the serving base station 105 is transmitting to the target UE 115 .

[0100] Figure 2 An example of a wireless communication system 200 that supports OTA interference coordination among base stations according to one or more aspects of the present disclosure is illustrated. In some examples, the wireless communication system 200 can implement aspects of the wireless communication system 100. For example, the wireless communication system 200 may include base stations 105-a and 105-b and UEs 115-a, 115-b, 115-c, and 115-d, which may be reference Figure 1 Examples of corresponding devices described. UEs 115-a, 115-b, 115-c, and 115-d can communicate with base stations 105-a and 105-b in a beamforming communication system.

[0101] In the wireless communication system 200, the base station 105 can use OTA transmission to convey information about interference coordination. The base station 105 can use the communication beam 205 to communicate with the UE 115. The communication beam 205 can be an example of a transmit beam, a receive beam, or a combination thereof (e.g., a transmit / receive beam). The serving base station 105 (e.g., the base station 105-a serving the UEs 115-a and 115-b) can determine a scheduling decision for communicating with the UE 115 using beamformed communications. For example, based on the scheduling decision, the serving base station 105-a can communicate with the UE 115-a in a first TTI subset using the communication beam 205-a, and can communicate with the UE 115-b in a second TTI subset using the communication beam 205-b. Similarly, base station 105 - b may communicate with UE 115 - c using communication beam 205 - c in a first TTI subset and may communicate with UE 115 - d using communication beam 205 - d in a second TTI subset.

[0102] In some implementations, UE 115-a may experience interference from a neighboring base station 105-b, which is a base station 105 that is different from the serving base station of UE 115-a. The interference may be due to signals transmitted by base station 105-b using communication beam 205-d (e.g., in communication with UE 115-d). In some examples, UE 115-a may send a message to neighboring base station 105-b to indicate to neighboring base station 105-b that UE 115-a is experiencing interference, or UE 115-a may send an interference message to serving base station 105-a to indicate to serving base station 105-a that UE 115-a is experiencing interference. In some examples, UE 115-a may transmit a message indicating that UE 115-a may experience interference due to a determined synchronization signal block (SSB) configuration of neighboring base station 105-b.

[0103] Other scheduling decisions may result in interference at one or more UEs 115. For example, UE 115-b may experience interference from a neighboring base station 105-b while monitoring for downlink transmissions from a serving base station 105-a. The interference may be due to signals transmitted using communication beam 205-c by base station 105-b in communication with UE 115-c. In some examples, UE 115-c may experience interference from a neighboring base station 105-a while monitoring for downlink transmissions from a serving base station 105-b. The interference may be due to signals transmitted using communication beam 205-b by base station 105-a in communication with UE 115-b. In some examples, UE 115-d may experience interference from a neighboring base station 105-a while monitoring for downlink transmissions from a serving base station 105-b. The interference may be due to signals transmitted using communication beam 205-a by base station 105-a in communication with UE 115-a.

[0104] However, certain scheduling decisions may result in low or no interference to one or more UEs 115 in the wireless communication system 200. In some examples, base station 105-a may communicate with UE 115-a using communication beam 205-a, and when base station 105-b communicates with UE 115-c using communication beam 205-c, UE 115-a may experience minimal or no interference from base station 105-b (e.g., based on the locations of UE 115-a and UE 115-c in the cell). Similarly, UE 115-c may also experience minimal or no interference in such a configuration. In some other examples, base station 105-a may communicate with UE 115-b using communication beam 205-b, and when base station 105-b communicates with UE 115-d using communication beam 205-d, UE 115-b may experience minimal or no interference from base station 105-b. Similarly, UE 115 - d may also experience minimal or no interference in such a configuration.

[0105] The serving base station 105-a may communicate with the neighboring base station 105-b to coordinate scheduling. Coordinated scheduling may allow the base station 105 to communicate with the UE 115 in a specific configuration to reduce and / or stabilize interference and avoid "unexpected" situations (e.g., situations where the UE 115 experiences significant interference from one or more neighboring base stations 105). In some examples, coordinated scheduling may involve the serving base station 105-a using OTA interference coordination signaling 210 to communicate with the potentially interfering base station 105-b. The OTA interference coordination signaling 210 may include an OTA interference coordination message. In some cases, the OTA interference coordination message may be a stand-alone message. In other cases, the OTA interference coordination message may be part of a larger message (e.g., such as any backhaul message, uplink message, downlink message, etc.).

[0106] In some examples, the serving base station 105-a may determine to send an OTA interference coordination message to the neighboring base station 105-b based on one or more parameters (i.e., communication parameters). These parameters may include the QoS level of the UE data traffic, the priority of the UE 115, the location or proximity of the UE 115 to the serving base station 105, the link quality of the communication link between the serving base station 105 and the UE 115 (e.g., the measured SINR, the measured SIR, or both), or any combination thereof. In some cases, the base station 105-a may determine the QoS level of the UE data traffic (e.g., downlink traffic on the physical downlink shared channel (PDSCH)), for example, based on a QoS class identifier (QCI). The base station 105-a may compare the QoS level of the PDSCH with pending transmissions with a static or dynamic QoS threshold. If the QoS level is greater than the QoS threshold, the base station 105-a may determine to send the OTA interference coordination message. In some other cases, if the UE priority is higher than the priority threshold, the base station 105-a may determine to send the OTA interference coordination message. The priority of UE 115 may be affected by the subscription plan to which UE 115 belongs. In some examples, UE 115 may receive a priority value from base station 105 based on the subscription plan, and serving base station 105-a may determine the priority value for UE 115 based on a lookup table in a memory or based on an indicator received from UE 115. In still other cases, base station 105-a may determine to send an OTA interference coordination message based on the link quality of UE 115. Link quality may be associated with the location of UE 115 or the proximity of UE 115 to serving base station 105-a. The location or proximity of UE 115 may refer to whether UE 115 is at or near a cell edge of serving base station 105-a (e.g., beyond a threshold distance from base station 105-a). UE 115 may experience relatively low SINR and / or relatively low SIR at or near a cell edge. If the UE 115 measures a low SINR value or a low SIR value corresponding to poor link quality (e.g., below a threshold SINR value or SIR value), the serving base station 105-a may determine to transmit an OTA interference coordination message. Additionally or alternatively, the serving base station 105-a may implement any combination of these or other parameter tests to determine whether to transmit OTA interference coordination signaling 210.

[0107] In some examples, the serving base station 105-a may send an OTA interference coordination message to a neighboring base station 105-b. The serving base station 105-a may broadcast the interference coordination message to any neighboring base station 105 within signal range, or the serving base station 105-a may unicast the message to one or more dedicated neighboring base stations (e.g., in a designated base station group). The base station 105-a may broadcast to neighboring base stations 105 to coordinate with multiple specific target cells or because the OTA signal is intended for various target cells or various target communication beams. The interference coordination message may be broadcast using an omnidirectional beam or by performing a beam sweeping procedure (e.g., using multiple narrow beams). Since the OTA signal is dedicated to a specific interfering cell, the serving base station 105-a may unicast the message to the designated neighboring base station 105.

[0108] In some cases, the UE 115 or the base station 105 may determine the content of the interference coordination message. For example, the base station 105-a may determine the content of the interference coordination message based on the interference coordination scheme, the method used for message transmission, or both. The interference coordination scheme may include interference beam fixation, interference beam suppression, or interference beam avoidance, as described in reference to Figure 3A , 3B and as described in 3C.

[0109] In some examples, a portion of the content of the interference coordination message may be common to broadcast and unicast messages. The content may include trigger information, time-related information, frequency-related information, power-related information, priority-related information, or any combination thereof. The trigger information may include an indication to start or stop interference coordination at the neighboring base station 105. The time-related information may include the start and / or end time of interference coordination, the duration of coordination, the beam fixing period (e.g., how long to change the beam in the beam fixing scheme), or some combination of this information. The frequency-related information may include BWP, subband index, subcarrier index, or some combination of these to avoid transmission or for transmission. The power-related information may include the transmit power or the transmit power reduction level for power backoff. For example, in beam suppression, the neighboring base station 105 may set the transmit power of one or more beams to the indicated transmit power, or may reduce the transmit power to the indicated transmit power reduction level. The priority-related information may include a UE priority value and / or a data traffic priority value (e.g., as described herein).

[0110] In some examples, a portion of the content of the interference coordination message may be applicable to a unicast message. Such content may be intended for a specific interfering base station 105. In some cases, the unicast content may include cell-related information, beam-related information, or both. Cell-related information may include a cell identifier (ID), a base station ID, a transmit / receive point (TRP) ID, or some combination of these IDs for an interfering base station 105 and / or a serving base station 105. The beam-related information may include a beam index to be avoided or a beam index used by a serving base station 105. In some cases, the beam-related information may be determined by one or more UEs 115. For example, a UE 115 (such as UE 115-a) may determine a beam index for an interfering communication beam 205-d and may report the interfering beam index to the serving base station 105-a. The serving base station 105-a may include an interfering beam index in an OTA interference coordination message to command a neighboring base station 105-b to suppress the use of the interfering beam index when the serving base station 105-a is transmitting to the UE 115-a. In other cases, the serving base station 105-a may include an indication of the beam index for the communication beam 205-a in the OTA interference coordination message, and the neighboring base station 105-b may determine that transmissions on the communication beam 205-d may interfere with transmissions on the communication beam 205-a, and may modify transmissions on the communication beam 205-d accordingly. The cell-related information and the beam-related information may be unicast to one or more designated neighboring base stations 105 so that the neighboring base stations 105 can identify the cell and / or beam information for interference coordination.

[0111] In some examples, base station 105-a (i.e., a serving base station for UE 115-a) may generate and send OTA interference coordination signaling 210. Base station 105-a may send OTA interference coordination signaling 210 based on a scheduling decision for communicating with one or more UEs 115. For example, base station 105-a may indicate scheduling for one or more TTIs so that a neighboring base station 105 receiving the signaling may modify the scheduling decision in one or more TTIs based on the scheduling of the serving base station 105-a. In some cases, the OTA interference coordination message may be sent via one or more side links (e.g., wireless backhaul links) between base station 105-a and neighboring base stations 105. In some other cases, if serving base station 105-a has full-duplex capability (e.g., if serving base station 105-a can transmit on an uplink channel while monitoring uplink transmissions), base station 105-a may send OTA interference coordination signaling 210 to an interfering base station 105 (e.g., base station 105-b) on an uplink channel. In other scenarios, if the interfering base station 105 has full-duplex capability (e.g., if the interfering base station 105 can receive on a downlink channel while transmitting downlink transmissions), the base station 105-a can send OTA interference coordination signaling 210 to the interfering base station 105 (e.g., base station 105-b) on the downlink channel.

[0112] In some examples, UE 115 may send an OTA interference coordination message. Base station 105-a may send DCI to UE 115-a in a downlink transmission to notify UE 115-a to send an OTA interference coordination message. The DCI may indicate some or all of the content to be included in the OTA interference coordination message. UE 115-a may send an OTA interference coordination message to base station 105-b in an uplink transmission. UE 115-a may broadcast or unicast the OTA interference coordination message. When broadcasting the OTA interference coordination message, UE 115-a may use an omnidirectional beam, a communication beam for downlink reception from serving base station 105-a, and / or a beam sweeping procedure (e.g., sweeping across multiple narrow beams) as an uplink transmission beam for the OTA interference coordination message. Additionally or alternatively, when unicasting the OTA interference coordination message, UE 115-a may use a beam with maximum signal strength or link quality to communicate with base station 105-b (e.g., interfering base station 105). In some cases, UE 115-a may use some combination of these beams for broadcast and / or unicast signaling.

[0113] In some examples, a base station 105-b (e.g., a neighboring base station 105 interfering with UE 115-a) may receive OTA interference coordination signaling 210 and may perform an interference coordination scheme indicated by the OTA interference coordination message. In some cases, the OTA interference coordination message may indicate beam avoidance for a particular transmit beam. Additionally or alternatively, the base station 105-b may avoid interference with time and / or frequency resources by reducing the transmit power used for transmissions on the interfering beam (e.g., reducing the power used for transmissions using communication beam 205-d). The base station 105-b may use a different beam (e.g., communication beam 205-c) and / or schedule a different UE 115 (e.g., UE 115-c) to avoid interfering with signaling on the communication beam 205-a between the base station 105-a and the UE 115-a.

[0114] In some examples, the OTA interference coordination message may indicate beam fixing or beam suppression and any beam index may be omitted. Base station 105-b may fix or suppress all transmit beams or a subset of transmit beams supported by base station 105-b. The relationship between beam subsets and UE 115-a may be semi-statically determined by using information exchanged between base stations 105-a and 105-b via a backhaul link. For example, a switching message between base station 105-a and base station 105-b may indicate to base station 105-b a subset of communication beams 205 that may potentially interfere with transmissions of base station 105-a (e.g., based on the transmit and / or receive directions of the switching message). Beam suppression (which may be referred to as beam blanking) may include soft blanking or hard blanking. Hard blanking may refer to base station 105-b suppressing transmissions on one or more beams (e.g., by providing zero power for the transmission). Soft blanking may refer to reducing the transmit power to a lower level for transmissions on one or more beams.

[0115] The base station 105-b can implement a specific interference coordination scheme based on the content of the OTA interference coordination message. In some cases, the interference coordination scheme can be statically configured for the base station 105. In some other cases, the base station 105-b or a network device (e.g., a base station centralized unit (CU), a network server, etc.) can dynamically switch between interference coordination schemes to adapt to different interference situations. For example, a base station 105 with a lower overhead communication capacity can choose a beam fixed or beam suppression scheme, while a base station with a larger overhead communication capacity can choose a beam avoidance scheme. Additionally or alternatively, the serving base station 105-a or the network device can dynamically select a scheme from a set of supported schemes based on one or more communication parameters. These communication parameters can be associated with the target UE 115 (e.g., UE 115-a), the serving base station 105-a, or both. If the network device selects a scheme, the device can transmit an indication of the scheme to the serving base station 105-a. The serving base station 105-a can generate an OTA interference coordination message based on the selected scheme.

[0116] By transmitting the OTA interference coordination message to base station 105-b, base station 105-a can enable base station 105 to communicate with UE 115 with minimal interference. If serving base station 105-a is transmitting information to UE 115-a in the first TTI, the OTA interference coordination message can indicate to neighboring base station 105-b to modify the signaling to UE 115-d in the first TTI. As a result, UE 115-a can successfully receive the information with minimal interference treatment due to base station 105-b.

[0117] Figure 3A An example of a scheduling decision 300-a for supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is illustrated. In some examples, base stations 105-c and 105-d may perform scheduling decision 300-a. Base station 105-c may be an example of a serving base station 105-c, such as described in reference Figure 2 The base station 105-a described herein and the base station 105-d may be an example of a neighboring base station 105-d, such as the base station 105-d described herein. Figure 2 Base station 105-b is depicted. Serving base station 105-c may communicate with UE 115-e and UE 115-h over various beams, while neighboring base station 105-d may communicate with UE 115-f and UE 115-g over various beams.

[0118] In some implementations, base station 105-c may communicate with UE 115-e, and when base station 105-d is in communication with UE 115-g, UE 115-e may experience minimal interference or no interference 305 from base station 105-d (e.g., based on the locations of UE 115-e and UE 115-g in the cell). Similarly, base station 105-c may communicate with UE 115-h, and when base station 105-d is in communication with UE 115-f, UE 115-h may experience minimal interference or no interference 305 from base station 105-d. However, base station 105-c may communicate with UE 115-e, and when base station 105-d is in communication with UE 115-f, UE 115-e may experience interference 310 (e.g., significant interference above a certain interference threshold). Similarly, base station 105 - c may be in communication with UE 115 - h , and UE 115 - h may experience interference 310 when base station 105 - d is in communication with UE 115 - g .

[0119] In some examples, base stations 105-c and 105-d may coordinate scheduling using OTA coordination signaling. Base station 105-c may transmit interference coordination information to base station 105-d, which includes beam fixing information. The coordination information may include whether base station 105-d should implement beam fixing and the start and end times of interference beam fixing. Upon receiving the beam fixing coordination information, base station 105-d may fix the transmit beam within a configured time duration (e.g., regardless of whether the active beam causes interference). During the fixed beam interference duration, base station 105-d may refrain from changing the beam to ensure that the interference is stabilized within the duration. Base station 105-c may follow a similar or identical fixed schedule. Beam fixing may stabilize the interference experienced by UE 115 within each fixed time interval, so that UE 115 may avoid experiencing highly variable interference due to base station 105 frequently and / or switching the transmit beam in non-periodic intervals. In contrast, over a duration of time, a UE 115 (e.g., UE 115-e) may experience the same level of interference (or a relatively constant interference level within a threshold variance). Although the stable interference may be a high interference level or a low interference level, the stabilized interference allows the UE 115-e and the base station 105-c to better account for the interference. For example, the base station 105-c may reduce the coding rate during a duration of high interference to support more reliable signaling, and may increase the coding rate during a duration of low interference to support increased throughput.

[0120] Base station 105-d may fully utilize resources because base station 105-d is able to communicate in each TTI during the fixed beam interference duration. Due to the small amount of information transmitted by serving base station 105-c for beam fixing, the signaling overhead associated with transmitting an OTA interference coordination message with parameters for beam fixing may be relatively low because serving base station 105-c may refrain from including a beam index message in the message. In some examples, base station 105-d may transmit to UE 115-g with a beam for a fixed time duration while base station 105-c is transmitting to UE 115-e to ensure that no interference 305 occurs. During a subsequent fixed time duration, base station 105-d may communicate with UE 115-f while base station 105-c is communicating with UE 115-e, thereby causing interference 310. The periodicity of beam switching in the beam fixing scheme may be based on one or more parameters indicated in the OTA interference coordination message.

[0121] Figure 3B An example of a scheduling decision 300-b for supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is illustrated. In some examples, base stations 105-e and 105-f may perform scheduling decision 300-b. Base station 105-e may be an example of a serving base station 105-e, such as reference Figure 2 The base station 105-a described herein, and the base station 105-f may be an example of a neighboring base station 105-f, such as the base station 105-f described herein. Figure 2 The serving base station 105-e may communicate with the UE 115-i and the UE 115-j over various beams, while the neighboring base station 105-f may communicate with the UE 115-1 and the UE 115-k over various beams.

[0122] In some implementations, base station 105-e may communicate with UE 115-j, and when base station 105-f communicates with UE 115-l, UE 115-j may avoid experiencing significant interference from base station 105-f. However, base station 105-e may communicate with UE 115-j, and when base station 105-f communicates with UE 115-k, UE 115-j may experience significant interference 310. In some examples, base stations 105-e and 105-f may coordinate interference using OTA interference coordination signaling. Base station 105-e may transmit interference coordination information including interference beam blanking information to base station 105-f. The interference beam blanking information may include whether base station 105-f should implement interference beam blanking and the start and end times of scheduling coordination. Upon receiving the interference beam blanking information, base station 105-f may blank the interference beam in one or more TTIs or within a specific time duration. “Blanking” a beam may refer to refraining from transmitting on the beam during a TTI. In some cases, base station 105-f may refrain from transmitting on any communication beam in a particular TTI (e.g., a TTI in which base station 105-e transmits to UE 115-i).

[0123] In some examples, in a TTI in which base station 105-e schedules communications with UE 115-i, base station 105-f may refrain from scheduling any UE 115 for communication. When base station 105-f refrains from assigning any UE 115, UE 115-i may not experience interference 305 from base station 105-f due to the blank UE assignment 315. Base stations 105-e and 105-f may coordinate scheduling by implementing transmission blanking and may experience gains in interference mitigation. Since the amount of information transmitted by serving base station 105-e for beam blanking is relatively small, the signaling overhead of the OTA interference coordination message may be relatively low because serving base station 105-e may refrain from including beam index information in the message. The OTA interference coordination message may indicate the TTIs in which the interfering base station 105 blanks transmissions or performs backoff procedures.

[0124] Figure 3C An example of a scheduling decision 300-c for supporting OTA interference coordination according to one or more aspects of the present disclosure is illustrated. In some examples, base stations 105-g and 105-h may perform scheduling decision 300-c. Base station 105-g may be an example of a serving base station 105-g, such as reference Figure 2 The base station 105-a described, and the base station 105-h may be an example of a neighboring base station 105-h, such as the base station 105-h described in reference Figure 2Base station 105-b is depicted. Serving base station 105-g may communicate with UE 115-m and UE 115-n over various beams, while neighboring base station 105-h may communicate with UE 115-o and UE 115-p over various beams.

[0125] In some implementations, base station 105-g may communicate with UE 115-m, and when base station 105-h communicates with UE 115-p, UE 115-m may experience minimal or no interference 305 from base station 105-h. Similarly, base station 105-g may communicate with UE 115-n, and when base station 105-h communicates with UE 115-o, UE 115-n may experience minimal or no interference 305 from base station 105-h.

[0126] In some examples, base stations 105-g and 105-h may coordinate scheduling using OTA interference coordination signaling. Base station 105-g may transmit interference coordination information to base station 105-h, which includes beam avoidance information. The interference coordination information may include whether base station 105-h should implement beam avoidance, the start and end times of interference beam avoidance, one or more interference beam indices to be avoided, or some combination of the information. Upon receiving the interference beam avoidance coordination information, base station 105-h may modify the scheduling decision for UE 115 to reduce the interference to UE 115 scheduled by base station 105-g. In some cases, to avoid or mitigate interference, base station 105-h may schedule communications with UE 115-p in the TTI in which base station 105-g schedules communications with UE 115-m. In some other cases, to avoid or mitigate interference, base station 105-h may assign UE 115-o to time resources used by base station 105-g for communications with UE 115-n. Base station 105 - d may fully utilize resources because base station 105 - h is able to communicate in each TTI while implementing a beam avoiding scheme.

[0127] Figure 4 An example of a process flow 400 for supporting OTA interference coordination among base stations in accordance with one or more aspects of the present disclosure is illustrated. Process flow 400 illustrates an example OTA interference coordination signaling procedure for mitigating and / or stabilizing interference in a wireless communication system. For example, base station 105-i may be an example of a serving base station 105 for a first UE 115, and base station 105-j may be an example of a neighboring base station 105 that may potentially cause interference to the first UE 115. Base stations 105-i and 105-j may be reference base stations. Figure 1Examples of corresponding devices described in 3. The following alternative examples can be implemented, in which some operations are performed in a different order than described or not performed at all. In some cases, each operation may include additional features not mentioned below, or further operations may be added.

[0128] At 405, the base station 105-i may determine to transmit an interference coordination message (eg, in OTA interference coordination signaling). The base station 105-i may determine to transmit the message based on communication parameters of the UE 115 served by the base station 105-i.

[0129] At 410, the base station 105-i may identify an interference coordination scheme for scheduling coordination. In a first example, the base station 105-i is configured with an interference coordination scheme to be implemented. In a second example, the base station 105-i dynamically selects an interference coordination scheme from a set of possible interference coordination schemes based on one or more communication parameters. In a third example, the network device dynamically selects an interference coordination scheme and transmits an indication of the interference coordination scheme to the base station 105-i. The base station 105-i may identify the interference coordination scheme in a short-term or long-term manner. For example, for short-term operation, the base station 105-i may identify the interference coordination scheme for each TTI or interference coordination message, respectively. For long-term operation, the base station 105-i may identify the interference coordination scheme and may implement the scheme each time the base station 105-i determines to transmit an interference coordination message (e.g., at 405).

[0130] At 415, the base station 105-i may generate an interference coordination message based on determining that the message is to be transmitted and based on a scheduling decision for the base station 105-i. For example, the scheduling decision may indicate TTIs in which the base station 105-i schedules communications with the UE 115. The base station 105-i may indicate these TTIs in the payload of the generated message (e.g., so that a neighboring base station 105 receiving the message may identify the TTIs in which scheduling is to be coordinated to reduce and / or stabilize interference at the UE 115).

[0131] At 420, the base station 105-i may transmit the generated interference coordination message to the base station 105-j. In some cases, the base station 105-i may transmit the message directly to the base station 105-j. In some other cases, the base station 105-i may transmit the message to the base station 105-j via the UE 115 (e.g., the UE 115 served by the base station 105-i). The base station 105-j may receive the interference coordination message and, at 425, may modify a scheduling decision based on the interference coordination message (e.g., based on the interference coordination scheme). For example, in a TTI in which the base station 105-i has scheduled communications with the UE 115, the base station 105-j may schedule communications with the UE 115 that is beyond a threshold distance from the UE 115 (e.g., to meet a maximum interference threshold), or reduce the transmit power of a beam directed near the UE 115 (e.g., a beam that may potentially cause interference to the UE 115). At 430, base stations 105-i and 105-j may communicate with UE 115 based on the scheduling decision. For example, base station 105-i may communicate using an unmodified scheduling decision while base station 105-j may communicate using a modified scheduling decision based on the OTA interference coordination message.

[0132] Figure 5 A block diagram 500 of a device 505 supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is shown. The device 505 may be an example of aspects of a base station 105 as described herein. The device 505 may include a receiver 510, a communication manager 515, and a transmitter 520. The device 505 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0133] Receiver 510 may receive information, such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to OTA interference coordination, etc.). The information may be passed to other components of device 505. Receiver 510 may be a reference Figure 8 Examples of aspects of the described transceiver 820. The receiver 510 may utilize a single antenna or a collection of antennas.

[0134] The communication manager 515 can be a component of the first base station. The communication manager 515 can determine to transmit an interference coordination message based on a communication parameter of a UE served by the first base station, dynamically select an interference coordination scheme for at least a second base station based on the communication parameter, generate an interference coordination message based on the interference coordination scheme and a scheduling decision for the first base station, and transmit the generated interference coordination message to at least the second base station. Additionally or alternatively, the communication manager 515 can receive an interference coordination message from the second base station, determine the dynamically selected interference coordination scheme based on the interference coordination message, modify the scheduling decision based on the dynamically selected interference coordination scheme, and communicate with one or more UEs according to the modified scheduling decision.

[0135] The actions performed by the communication manager 515 as described herein may be implemented to achieve one or more potential advantages. One implementation may support a base station 105 (e.g., a first base station) to improve the reliability of transmission to the served UE based on mitigating interference from a neighboring base station (e.g., a second base station). For example, transmitting an interference coordination message may instruct the second base station to suppress or avoid transmitting an interference signal, thereby improving the reliability of transmission from the first base station to the UE. Another implementation may support the base station 105 to improve the rate control for managing interference based on stabilizing interference within one or more fixed time periods. For example, transmitting an interference coordination message may instruct the second base station to fix an active communication beam within a configured time duration, thereby allowing the first base station to improve interference estimates for the configured time duration, and update transmission parameters accordingly (e.g., modify the coding rate, implement positive acknowledgment / negative acknowledgment (ACK / NACK) feedback, etc.).

[0136] Based on transmitting the interference coordination message to the interfering base station, the processor of the first base station 105 (e.g., controlling the receiver 510, the communication manager 515 and / or the transmitter 520) can reduce the processing resources used for downlink transmission. For example, transmitting the interference coordination message can improve the transmission reliability to the target UE. In this way, the base station 105 can reduce the number of retransmissions used to successfully transmit the message to the target UE on the downlink. Reducing the number of retransmissions can reduce the number of times the processor increases processing power and opens the processing unit to handle the downlink message encoding and / or transmission. The reduced number of retransmissions can also reduce the overhead on the downlink channel (e.g., in addition to reducing the processing overhead at the processor).

[0137] The communication manager 515 may be an example of aspects of the communication manager 810 described herein. The communication manager 515 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 515 or its subcomponents may be performed by a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

[0138] The communication manager 515 or its subcomponents may be physically located at various locations, including being distributed such that portions of functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 515 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 515 or its subcomponents may be combined with one or more other hardware components (including, but not limited to, input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof).

[0139] The transmitter 520 may transmit signals generated by other components of the device 505. In some examples, the transmitter 520 may be co-located with the receiver 510 in a transceiver module. For example, the transmitter 520 may be a reference Figure 8 Examples of aspects of the described transceiver 820. The transmitter 520 may utilize a single antenna or a collection of antennas.

[0140] Figure 6 A block diagram 600 of a device 605 supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is shown. The device 605 may be an example of aspects of the device 505 or base station 105 as described herein. The device 605 may include a receiver 610, a communication manager 615, and a transmitter 655. The device 605 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0141] The receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to OTA interference coordination, etc.). The information may be passed to other components of the device 605. The receiver 610 may be a reference Figure 8 Examples of aspects of the described transceiver 820. The receiver 610 may utilize a single antenna or a collection of antennas.

[0142] The communication manager 615 can be an example of aspects of the communication manager 515 as described herein. The communication manager 615 can include a determination component 620, a message generation component 625, an interference coordination messaging component 630, an interference coordination receiving component 635, a schedule modifier 640, a communication component 645, a scheme identifier 650, or any combination of these components. The communication manager 615 can be an example of aspects of the communication manager 810 described herein. The communication manager 615 can be implemented at the first base station.

[0143] In some implementations, the determining component 620 may determine to transmit the interference coordination message based on the communication parameters of the UE served by the first base station. The scheme identifier 650 may dynamically select the interference coordination scheme for at least the second base station based on the communication parameters. The message generating component 625 may generate the interference coordination message based on the interference coordination scheme and the scheduling decision for the first base station. The interference coordination message delivery component 630 may transmit the generated interference coordination message to at least the second base station.

[0144] In other implementations, the interference coordination receiving component 635 may receive an interference coordination message from a second base station. The scheme identifier 650 may determine a dynamically selected interference coordination scheme based on the interference coordination message. The scheduling modifier 640 may modify the scheduling decision based on the dynamically selected interference coordination scheme. The communication component 645 may communicate with one or more UEs based on the modified scheduling decision.

[0145] The transmitter 655 can transmit signals generated by other components of the device 605. In some examples, the transmitter 655 can be co-located with the receiver 610 in a transceiver module. For example, the transmitter 655 can be a reference Figure 8 Examples of aspects of the described transceiver 820. The transmitter 655 may utilize a single antenna or a collection of antennas.

[0146] Figure 7A block diagram 700 of a communication manager 705 supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is shown. The communication manager 705 can be an example of aspects of the communication manager 515, the communication manager 615, or the communication manager 810 described herein. The communication manager 705 can include a determination component 710, a message generation component 715, an interference coordination messaging component 720, a broadcast component 725, a unicast component 730, a QoS level component 735, a priority component 740, a link quality component 745, a communication component 750, an interference coordination reception component 755, a schedule modifier 760, a scheme identifier 765, a beam fixation component 770, a beam suppression component 775, a beam avoidance component 780, or any combination of these components. Each of these modules can communicate directly or indirectly with each other (e.g., via one or more buses). The communication manager 705 can be a component of a first base station.

[0147] In one implementation, the determination component 710 may determine to transmit an interference coordination message based on a communication parameter of a UE served by the first base station. The message generation component 715 may generate an interference coordination message based on the determination and a scheduling decision for the first base station. In some examples, generating the interference coordination message may involve: the message generation component 715 generates a payload of the interference coordination message based on the scheduling decision for the first base station, wherein the payload includes an indication of an interference coordination scheme, or a trigger for interference coordination, or a start time for interference coordination, or an end time for interference coordination, or a time duration for interference coordination, or a beam fixed time period for at least a second base station, or a frequency resource for transmission of the first base station, or a transmit power level of at least a second base station, or a transmit power reduction level of at least a second base station, or a UE priority value of a UE, or a data traffic priority value of a UE, or a cell ID of the first base station or the second base station, or a base station ID of the first base station or the second base station, or a TRP ID of the first base station or the second base station, or one or more beam indices, or a combination thereof.

[0148] The interference coordination message transmission component 720 can transmit the generated interference coordination message to at least the second base station. In some examples, transmitting the interference coordination message can involve the interference coordination message transmission component 720 transmitting the generated interference coordination message via a wireless backhaul link, or an uplink channel, or a downlink channel, or a combination thereof. In some cases, the generated interference coordination message is transmitted based on the duplex capability of the first base station, the duplex capability of the second base station, or both.

[0149] In some cases, transmitting the interference coordination message may involve broadcasting component 725 broadcasting the generated interference coordination message to any base station (e.g., a set of base stations within reception range of the first base station), the set of base stations including at least the second base station. In some other cases, transmitting the interference coordination message may involve unicasting component 730 unicasting the generated interference coordination message to a designated group of base stations including at least the second base station.

[0150] In some examples, the communication parameter can be an example of a QoS level for downlink transmissions to the UE. In these examples, the QoS level component 735 can identify that the QoS level for downlink transmissions to the UE is greater than a threshold QoS level, wherein determining to transmit the interference coordination message is based on the identification.

[0151] In some examples, the communication parameter can be an example of a priority value of the UE. In these examples, the priority component 740 can identify that the priority value of the UE is greater than a threshold priority value, wherein determining to transmit the interference coordination message is based on the identification.

[0152] In some examples, the communication parameter can be an example of a SIR value, a SINR value, or both of the UE. In these examples, the link quality component 745 can identify that the SIR or SINR or both of the UE are less than one or more thresholds, wherein determining to transmit the interference coordination message is based on the identification.

[0153] In some examples, the communication parameter can be an example of location information of the UE. In these examples, the link quality component 745 can identify that the distance of the UE from the first base station is greater than a threshold distance based on the location information, wherein determining to transmit the interference coordination message is based on the identification.

[0154] In some cases, communication component 750 can communicate with the UE based on the scheduling decision.

[0155] In another implementation, the interference coordination receiving component 755 may receive an interference coordination message from the second base station. In some examples, the interference coordination receiving component 755 may receive the interference coordination message via a wireless backhaul link, or an uplink channel, or a downlink channel, or a combination thereof. The scheduling modifier 760 may modify the scheduling decision based on the interference coordination message. The communication component 750 may communicate with one or more UEs based on the modified scheduling decision.

[0156] The scheme identifier 765 may determine an interference coordination scheme based on the interference coordination message, wherein the scheduling decision is modified based on the interference coordination scheme. For example, the scheme identifier 765 may determine a dynamically selected interference coordination scheme based on the interference coordination message. In some examples, the scheme identifier 765 may dynamically select an interference coordination scheme for at least a second base station based at least in part on the communication parameters.

[0157] In a first example, the interference coordination scheme may be an interference beam fixing scheme. Modifying the scheduling decision may involve the beam fixing component 770 operating using each communication beam in the communication beam set in a configured number of TTIs based on a beam fixing time interval or a beam fixing period or both indicated by the interference coordination message. In some cases, the communication beam set is a subset of the communication beam set operated by the first base station.

[0158] In a second example, the interference coordination scheme may be an interference beam suppression scheme. Modifying the scheduling decision may involve the beam suppression component 775 modifying the transmit power of the communication beam set based on the second scheduling decision for the second base station. In some examples, the beam suppression component 775 may reduce the transmit power of the communication beam set to zero, or to a transmit power level indicated by the interference coordination message, or reduce the transmit power reduction level indicated by the interference coordination message based on the interference coordination scheme. In some examples, the beam suppression component 775 may determine one or more TTIs in which the second base station is scheduled to transmit to a specific UE based on the second scheduling decision, wherein the transmit power of the communication beam set is modified in the one or more TTIs. In some cases, the communication beam set is a subset of the communication beam set operated by the first base station.

[0159] In a third example, the interference coordination scheme may be an interference beam avoidance scheme. Modifying the scheduling decision may involve the beam avoidance component 780 suppressing the use of the communication beam set for operation based on a second scheduling decision for the second base station. In some examples, the beam avoidance component 780 may determine the communication beam set based on the cell ID of the second base station indicated by the interference coordination message, or the base station ID of the second base station, or the TRP ID of the second base station, or one or more beam indices, or a combination thereof. In some examples, suppressing the use of the communication beam set for operation may involve the beam avoidance component 780 determining one or more TTIs in which the second base station is scheduled to transmit to a specific UE according to the second scheduling decision, and operating using a second communication beam set different from the communication beam set in the one or more TTIs. In some cases, the communication beam set is a subset of the communication beam set operated by the first base station.

[0160] Figure 8A diagram of a system 800 including a device 805 supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is shown. The device 805 may be an example of or include components of a device 505, a device 605, or a base station 105 as described herein. The device 805 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a communication manager 810, a network communication manager 815, a transceiver 820, an antenna 825, a memory 830, a processor 840, and an inter-station communication manager 845. These components may be in electronic communication via one or more buses (e.g., bus 850).

[0161] The communication manager 810 may be implemented at the first base station. The communication manager 810 may determine to transmit an interference coordination message based on communication parameters of the UE served by the first base station, dynamically select an interference coordination scheme for at least a second base station based on the communication parameters, generate an interference coordination message based on the interference coordination scheme and a scheduling decision for the first base station, and transmit the generated interference coordination message to at least the second base station. Additionally or alternatively, the communication manager 810 may receive an interference coordination message from the second base station, determine the dynamically selected interference coordination scheme based on the interference coordination message, modify the scheduling decision based on the dynamically selected interference coordination message, and communicate with one or more UEs according to the modified scheduling decision.

[0162] The network communications manager 815 may manage communications with the core network 130 (eg, via one or more wired backhaul links). For example, the network communications manager 815 may manage the delivery of data communications for client devices, such as one or more UEs 115.

[0163] The transceiver 820 may communicate bidirectionally via one or more antennas, wired or wireless links, as described herein. For example, the transceiver 820 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 820 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, and demodulate packets received from an antenna.

[0164] In some cases, a wireless device may include a single antenna 825. However, in some cases, the device may have more than one antenna 825, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0165] The memory 830 may include random access memory (RAM), read-only memory (ROM), or a combination thereof. The memory 830 may store computer readable code 835 including instructions that, when executed by a processor (e.g., processor 840), cause the device to perform various functions described herein. In some cases, the memory 830 may include, among other things, a basic I / O system (BIOS) that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0166] The processor 840 may include an intelligent hardware device (e.g., a general purpose processor, a DSP, a central processing unit (CPU), a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 840 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into the processor 840. The processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 830) to cause the device 805 to perform various functions (e.g., functions or tasks to support OTA interference coordination among base stations).

[0167] The inter-site communication manager 845 may manage communications with other base stations 105 and may include a controller or scheduler for controlling communications with UE 115 in cooperation with other base stations 105. For example, the inter-site communication manager 845 may coordinate scheduling of transmissions to UE 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, the inter-site communication manager 845 may provide an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between base stations 105.

[0168] The code 835 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 835 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some cases, the code 835 may not be directly executed by the processor 840, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0169] Fig. 9 A block diagram 900 of a device 905 supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is shown. The device 905 may be an example of aspects of a network entity as described herein. The device 905 may include a receiver 910, a communication manager 915, and a transmitter 920. The device 905 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0170] The receiver 910 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to interference coordination, etc.). The information may be passed to other components of the device 905. The receiver 910 may be a reference Fig.12 Examples of various aspects of the described transceiver 1220. The receiver 910 may utilize a single antenna or a collection of antennas.

[0171] The communication manager 915 may be implemented at a device in a wireless network, such as a base station 105 or another network device. The communication manager 915 may determine a communication parameter of a UE served by a serving base station, or of a serving base station, or both, dynamically select an interference coordination scheme for the serving base station and one or more neighboring base stations based on the communication parameter, and transmit an indication of the dynamically selected interference coordination scheme to the base station. The communication manager 915 may be an example of aspects of the communication manager 1210 described herein.

[0172] The actions performed by the communication manager 915 as described herein may be implemented to achieve one or more potential advantages. An implementation may allow a network entity (e.g., a base station 105, a network device, etc.) to dynamically select an interference coordination scheme for a base station based on current conditions in the network. For example, based on interference levels or UE prioritization strategies, the network entity may determine between a beam fixed scheme, a beam suppression scheme, and / or a beam avoidance scheme. The beam fixed scheme may support interference stabilization in the network and may result in low signaling overhead for interference coordination. The beam suppression scheme and the beam avoidance scheme may support interference mitigation for a target UE in the network, thereby improving transmission reliability to the target UE.

[0173] The communication manager 915 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 915 or its subcomponents may be performed by a general purpose processor, DSP, ASIC, FPGA or other programmable logic device designed to perform the functions described in this disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0174] The communication manager 915 or its subcomponents may be physically located at various locations, including being distributed such that portions of functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 915 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 915 or its subcomponents may be combined with one or more other hardware components (including, but not limited to, I / O components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof).

[0175] The transmitter 920 may transmit signals generated by other components of the device 905. In some examples, the transmitter 920 may be co-located with the receiver 910 in a transceiver module. For example, the transmitter 920 may be a reference Fig.12 Examples of various aspects of the described transceiver 1220. The transmitter 920 may utilize a single antenna or a collection of antennas.

[0176] Fig.10 A block diagram 1000 of a device 1005 supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is shown. The device 1005 may be an example of aspects of the device 905 or network entity as described herein. The device 1005 may include a receiver 1010, a communication manager 1015, and a transmitter 1035. The device 1005 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0177] The receiver 1010 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to OTA interference coordination, etc.). The information may be passed to other components of the device 1005. The receiver 1010 may be a reference Fig.12 Examples of various aspects of the described transceiver 1220. The receiver 1010 may utilize a single antenna or a collection of antennas.

[0178] The communication manager 1015 may be an example of aspects of the communication manager 915 as described herein. The communication manager 1015 may include a parameter identifier 1020, a scheme selection component 1025, and a scheme selection indicator 1030. The communication manager 1015 may be an example of aspects of the communication manager 1210 as described herein.

[0179] The parameter identifier 1020 may determine a communication parameter. The communication parameter may be used for a UE served by a serving base station or for a serving base station or for both. A scheme selection component 1025 may dynamically select an interference coordination scheme for a serving base station and one or more neighboring base stations based on the communication parameter. A scheme selection indicator 1030 may transmit an indication of the dynamically selected interference coordination scheme to a base station (e.g., a serving base station or one or more neighboring base stations).

[0180] The transmitter 1035 can transmit signals generated by other components of the device 1005. In some examples, the transmitter 1035 can be co-located with the receiver 1010 in a transceiver module. For example, the transmitter 1035 can be a reference Fig.12 Examples of various aspects of the described transceiver 1220. The transmitter 1035 may utilize a single antenna or a collection of antennas.

[0181] Fig.11 A block diagram 1100 of a communication manager 1105 supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is shown. The communication manager 1105 can be an example of aspects of the communication manager 915, the communication manager 1015, or the communication manager 1210 described herein. The communication manager 1105 may include a parameter identifier 1110, a scheme selection component 1115, a scheme selection indicator 1120, a beam fixation component 1125, a beam suppression component 1130, a beam avoidance component 1135, or some combination of these components. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses). The communication manager 1105 can be implemented at a device in a wireless network, such as a base station 105 or another network device.

[0182] The parameter identifier 1110 may determine a communication parameter of the UE served by the serving base station, or of the serving base station, or both. In some cases, the communication parameter includes a QoS level of downlink transmission from the serving base station to the UE, or a priority value of the UE, or a SIR of the UE, or a SINR of the UE, or location information of the UE relative to the serving base station, or a combination thereof.

[0183] The scheme selection component 1115 can dynamically select an interference coordination scheme for the serving base station and one or more neighboring base stations based on the communication parameters. The scheme selection indicator 1120 can transmit an indication of the dynamically selected interference coordination scheme to the base station. In some examples, transmitting the indication of the dynamically selected interference coordination scheme can involve the scheme selection indicator 1120 transmitting an indication of whether to implement the dynamically selected interference coordination scheme, or a start time for implementing the dynamically selected interference coordination scheme, or an end time for implementing the dynamically selected interference coordination scheme, or a combination thereof.

[0184] In some examples, the device in the wireless network may be a network entity and may transmit an indication of the selected scheme to a serving base station. In these examples, determining the communication parameters may involve the parameter identifier 1110 receiving the communication parameters from the serving base station. In some other examples, the device in the wireless network may be a serving base station, and transmitting the indication of the selected scheme may involve the scheme selection indicator 1120 transmitting an interference coordination message to one or more neighboring base stations, wherein a payload of the interference coordination message is based on the dynamically selected interference coordination scheme.

[0185] In a first example, the dynamically selected interference coordination scheme may be an interference beam fixing scheme, and transmitting an indication of the dynamically selected interference coordination scheme may involve the beam fixing component 1125 transmitting an indication of a beam fixing time interval or a beam fixing periodicity, or both, of the interference beam fixing scheme. In a second example, the dynamically selected interference coordination scheme may be an interference beam suppression scheme, and transmitting an indication of the dynamically selected interference coordination scheme may involve the beam suppression component 1130 transmitting an indication of a transmit power level or a transmit power reduction level, or both, of the interference beam suppression scheme. In a third example, the dynamically selected interference coordination scheme may be an interference beam avoidance scheme, and transmitting an indication of the dynamically selected interference coordination scheme may involve the beam avoiding component 1135 transmitting an indication of one or more beam indices to be avoided by the interference beam avoidance scheme.

[0186] Fig.12 A diagram of a system 1200 including a device 1205 supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is shown. The device 1205 may be an example of or include components of a device 905, a device 1005, or a network entity (e.g., a base station 105, a network device, etc.) as described herein. The device 1205 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a communication manager 1210, an I / O controller 1215, a transceiver 1220, an antenna 1225, a memory 1230, and a processor 1235. These components may be in electronic communication via one or more buses (e.g., a bus 1245).

[0187] The communication manager 1210 can determine the communication parameters of the UE served by the serving base station, or of the serving base station, or both, dynamically select an interference coordination scheme for the serving base station and one or more neighboring base stations based on the communication parameters, and transmit an indication of the dynamically selected interference coordination scheme to the base station.

[0188] I / O controller 1215 can manage input and output signals for device 1205. I / O controller 1215 can also manage peripheral devices that are not integrated into device 1205. In some cases, I / O controller 1215 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 1215 can utilize an operating system, such as Or another known operating system. In other cases, I / O controller 1215 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 1215 may be implemented as part of a processor. In some cases, a user may interact with device 1205 via I / O controller 1215 or via hardware components controlled by I / O controller 1215.

[0189] The transceiver 1220 may communicate bidirectionally via one or more antennas, wired or wireless links, as described herein. For example, the transceiver 1220 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1220 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, and demodulate packets received from an antenna.

[0190] In some cases, a wireless device may include a single antenna 1225. However, in some cases, the device may have more than one antenna 1225, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0191] Memory 1230 may include RAM and ROM. Memory 1230 may store computer-readable, computer-executable code 1240 including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, memory 1230 may include, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0192] The processor 1235 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 1235 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 1235. The processor 1235 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1230) to cause the device 1205 to perform various functions (e.g., functions or tasks to support OTA interference coordination among base stations).

[0193] The code 1240 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1240 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some cases, the code 1240 may not be directly executed by the processor 1235, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0194] Fig.13 1 is a flow chart illustrating a method 1300 for supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure. The operations of the method 1300 may be implemented by the base station 105 or components thereof as described herein. For example, the operations of the method 1300 may be implemented by the base station 105 or components thereof as described herein. Figures 5 to 8 In some examples, a base station may execute an instruction set to control functional elements of the base station to perform the functions described herein. Additionally or alternatively, a base station may use dedicated hardware to perform various aspects of the functions described herein.

[0195] At 1305, a base station (ie, a first base station) may determine to transmit an interference coordination message based on a communication parameter of a UE served by the first base station. The operations of 1305 may be performed according to the methods described herein. In some examples, aspects of the operations of 1305 may be performed as described with reference to Figures 5 to 8 The described determining components are performed.

[0196] At 1310, the base station may dynamically select an interference coordination scheme for at least a second base station based on the communication parameters. The operations of 1310 may be performed according to the methods described herein. In some examples, aspects of the operations of 1305 may be performed as described with reference to Figures 5 to 8 The described scheme identifier is executed.

[0197] At 1315, the base station may generate an interference coordination message based on the interference coordination scheme and the scheduling decision for the first base station. The operations of 1315 may be performed according to the methods described herein. In some examples, aspects of the operations of 1315 may be performed as described with reference to Figures 5 to 8 The described message generation component is executed.

[0198] At 1320, the base station may transmit the generated interference coordination message to at least the second base station. The operations of 1320 may be performed according to the methods described herein. In some examples, aspects of the operations of 1320 may be performed as described with reference to Figures 5 to 8 The described interference coordination messaging component is performed.

[0199] Fig.14A flow chart illustrating a method 1400 for supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is shown. The operations of the method 1400 may be implemented by a network entity or component thereof as described herein. For example, the operations of the method 1400 may be implemented by a network entity or component thereof as described with reference to Figures 9 to 12 In some examples, a network entity may execute an instruction set to control functional elements of the network entity to perform the functions described herein. Additionally or alternatively, a network entity may use dedicated hardware to perform various aspects of the functions described herein.

[0200] At 1405, the network entity may determine communication parameters of a UE served by a serving base station, or of a serving base station, or both. The operations of 1405 may be performed according to the methods described herein. In some examples, aspects of the operations of 1405 may be performed as described with reference to Figures 9 to 12 The parameter identifier described is executed.

[0201] At 1410, the network entity may dynamically select an interference coordination scheme for a serving base station and one or more neighboring base stations based on communication parameters. The operations of 1410 may be performed according to the methods described herein. In some examples, aspects of the operations of 1410 may be performed as described with reference to Figures 9 to 12 The described scheme selects components to execute.

[0202] At 1415, the network entity may transmit an indication of the dynamically selected interference coordination scheme to the base station. The operations of 1415 may be performed according to the methods described herein. In some examples, aspects of the operations of 1415 may be performed as described with reference to Figures 9 to 12 The described scheme selects the indicator to be executed.

[0203] Fig.15 A flow chart illustrating a method 1500 for supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is shown. The operations of the method 1500 may be implemented by the base station 105 or components thereof as described herein. For example, the operations of the method 1500 may be implemented by the base station 105 or components thereof as described herein. Figures 5 to 8 In some examples, a base station may execute an instruction set to control functional elements of the base station to perform the functions described herein. Additionally or alternatively, a base station may use dedicated hardware to perform various aspects of the functions described herein.

[0204] At 1505, a base station (ie, a first base station) may receive an interference coordination message from a second base station. The operations of 1505 may be performed according to the methods described herein. In some examples, aspects of the operations of 1505 may be performed as described with reference to Figures 5 to 8 The described interference coordination is performed by a receiving component.

[0205] At 1510, the base station may determine a dynamically selected interference coordination scheme based on the interference coordination message. The operations of 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be performed as described with reference to Figures 5 to 8 The described scheme identifier is executed.

[0206] At 1515, the base station may modify the scheduling decision based on the dynamically selected interference coordination scheme. The operations of 1515 may be performed according to the methods described herein. In some examples, aspects of the operations of 1515 may be performed as described in reference to Figures 5 to 8 Describes the scheduling modifier to execute.

[0207] At 1520, the base station may communicate with one or more UEs based on the modified scheduling decision. The operations of 1520 may be performed according to the methods described herein. In some examples, aspects of the operations of 1520 may be performed as described with reference to Figures 5 to 8 The described communication components are used to perform.

[0208] Fig.16 A flow chart illustrating a method 1600 for supporting OTA interference coordination among base stations according to one or more aspects of the present disclosure is shown. The operations of the method 1600 may be implemented by a UE 115 or a component thereof as described herein. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the functions described herein. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described herein.

[0209] At 1605, the UE may receive a message from a serving base station, the message including an indication of a dynamically selected interference coordination scheme and an indication of a scheduling decision. In some examples, the UE may trigger a message from a serving base station. For example, the UE may detect interference from a neighboring base station greater than a threshold interference level, and may transmit an interference message indicating the detected interference to the serving base station. The serving base station may transmit the message received at 1605 based on the interference message. The operations of 1605 may be performed according to the methods described herein. In some examples, various aspects of the operations of 1605 may be performed by a receiver or transceiver of the UE.

[0210] At 1610, the UE may transmit an interference coordination message indicating a dynamically selected interference coordination scheme and a scheduling decision to at least a neighboring base station. In some examples, the UE may receive a DCI at 1605 notifying the UE to transmit an interference coordination message to at least a neighboring base station, and the UE may transmit the interference coordination message at 1610 based on the DCI. In some other examples, the UE may receive an interference coordination message from a serving base station at 1605, and may relay the interference coordination message from the serving base station to at least a neighboring base station at 1610. The operations of 1610 may be performed according to the methods described herein. In some examples, various aspects of the operations of 1610 may be performed by a transmitter or a transceiver of the UE.

[0211] At 1615, the UE may communicate with the serving base station based on the scheduling decision. The operations of 1615 may be performed according to the methods described herein. In some examples, aspects of the operations of 1615 may be performed by a transmitter, a receiver, or a transceiver of the UE.

[0212] The following provides an overview of various examples of the present disclosure:

[0213] Example 1: A method for performing wireless communications at a first base station, comprising: determining to transmit an interference coordination message based at least in part on communication parameters of a UE served by the first base station; dynamically selecting an interference coordination scheme for at least a second base station based at least in part on the communication parameters; generating an interference coordination message based at least in part on the interference coordination scheme and a scheduling decision for the first base station; and transmitting the generated interference coordination message to at least the second base station.

[0214] Example 2: The method as in Example 1, wherein transmitting the generated interference coordination message comprises: broadcasting the generated interference coordination message to a plurality of base stations within a reception range of the first base station, the plurality of base stations including at least the second base station.

[0215] Example 3: The method of Example 1, wherein transmitting the generated interference coordination message comprises: unicasting the generated interference coordination message to a designated base station group including at least the second base station.

[0216] Example 4: A method as described in any one of Examples 1 to 3, wherein generating an interference coordination message includes: generating a payload of the interference coordination message based at least in part on an interference coordination scheme or a scheduling decision for a first base station, or both, wherein the payload includes an indication of the interference coordination scheme, or a trigger for interference coordination, or a start time for interference coordination, or an end time for interference coordination, or a time duration for interference coordination, or a beam fixed time period for at least a second base station, or a frequency resource for transmission of the first base station, or a transmit power level of at least the second base station, or a transmit power reduction level of at least the second base station, or a UE priority value of the UE, or a data traffic priority value of the UE, or a cell identifier of the first base station, or a base station identifier of the first base station, or a transmit / receive point identifier of the first base station, or one or more beam indices, or a combination thereof.

[0217] Example 5: The method of any one of Examples 1 to 4, wherein transmitting the generated interference coordination message comprises transmitting the generated interference coordination message via a wireless backhaul link, or an uplink channel, or a downlink channel, or a combination thereof.

[0218] Example 6: The method of any of Examples 1 to 5, wherein the generated interference coordination message is transmitted based at least in part on a duplex capability of the first base station or a duplex capability of the second base station, or both.

[0219] Example 7: A method as described in any one of Examples 1 to 6, wherein the communication parameters include a QoS level of a downlink transmission to the UE, the method further comprising: identifying that the QoS level of the downlink transmission to the UE is greater than a threshold QoS level, wherein determining to transmit an interference coordination message is based at least in part on the identification.

[0220] Example 8: A method as in any one of Examples 1 to 7, wherein the communication parameter includes a priority value of the UE, the method further comprising: identifying that the priority value of the UE is greater than a threshold priority value, wherein determining to transmit the interference coordination message is based at least in part on the identification.

[0221] Example 9: A method as in any one of Examples 1 to 8, wherein the communication parameter includes the SIR or SINR or both of the UE, the method further comprising: identifying that the SIR or SINR or both of the UE is less than one or more thresholds, wherein determining to transmit the interference coordination message is based at least in part on the identification.

[0222] Example 10: A method as in any one of Examples 1 to 9, wherein the communication parameters include location information of the UE, the method further comprising: identifying that the distance between the UE and the first base station is greater than a threshold distance based at least in part on the location information, wherein determining to transmit an interference coordination message is based at least in part on the identification.

[0223] Example 11: The method of any one of Examples 1 to 10 further comprises: communicating with the UE according to the scheduling decision.

[0224] Example 12: A method for performing wireless communications at a device in a wireless network, comprising: determining communication parameters of a UE served by a serving base station or of a serving base station, or both; dynamically selecting an interference coordination scheme for the serving base station and one or more neighboring base stations based at least in part on the communication parameters; and transmitting an indication of the dynamically selected interference coordination scheme to the base station.

[0225] Example 13: A method as in Example 12, wherein the dynamically selected interference coordination scheme includes an interference beam fixing scheme, and transmitting an indication of the dynamically selected interference coordination scheme includes: transmitting an indication of a beam fixing time interval or a beam fixing periodicity or both of the interference beam fixing scheme.

[0226] Example 14: A method as in any of Examples 12 or 13, wherein the dynamically selected interference coordination scheme includes an interference beam suppression scheme, and transmitting an indication of the dynamically selected interference coordination scheme includes: transmitting an indication of a transmit power level or a transmit power reduction level or both for the interference beam suppression scheme.

[0227] Example 15: A method as in any one of Examples 12 to 14, wherein the dynamically selected interference coordination scheme includes an interference beam avoidance scheme, and transmitting an indication of the dynamically selected interference coordination scheme includes: transmitting an indication of one or more beam indices to be avoided by the interference beam avoidance scheme.

[0228] Example 16: A method as described in any one of Examples 12 to 15, wherein transmitting an indication of a dynamically selected interference coordination scheme includes: transmitting an indication of whether to implement the dynamically selected interference coordination scheme, or a start time for implementing the dynamically selected interference coordination scheme, or an end time for implementing the dynamically selected interference coordination scheme, or a combination thereof.

[0229] Example 17: A method as described in any one of Examples 12 to 16, wherein the communication parameters include the QoS level of downlink transmission from the serving base station to the UE, or the priority value of the UE, or the SIR of the UE, or the SINR of the UE, or the location information of the UE relative to the serving base station, or a combination thereof.

[0230] Example 18: The method of any one of Examples 12 to 17, wherein the device in the wireless network comprises a network entity and the base station comprises a serving base station, and determining the communication parameter further comprises: receiving the communication parameter from the serving base station.

[0231] Example 19: A method as in any of Examples 12 to 17, wherein a device in a wireless network includes a serving base station and transmitting an indication of a dynamically selected interference coordination scheme to the base station includes: transmitting an interference coordination message to one or more neighboring base stations, wherein a payload of the interference coordination message is based at least in part on the dynamically selected interference coordination scheme.

[0232] Example 20: A method for performing wireless communications at a first base station, comprising: receiving an interference coordination message from a second base station; determining a dynamically selected interference coordination scheme based at least in part on the interference coordination message; modifying a scheduling decision based at least in part on the dynamically selected interference coordination scheme; and communicating with one or more user UEs based on the modified scheduling decision.

[0233] Example 21: A method as in Example 20, wherein the dynamically selected interference coordination scheme includes an interference beam fixing scheme, and modifying the scheduling decision includes: operating using each communication beam in the communication beam set in a configured number of TTIs based at least in part on a beam fixing time interval or a beam fixing periodicity or both indicated by the interference coordination message.

[0234] Example 22: The method of Example 21, wherein the set of communication beams comprises a subset of a plurality of communication beams operated by the first base station.

[0235] Example 23: A method as in Example 20, wherein the dynamically selected interference coordination scheme includes an interference beam suppression scheme, and modifying the scheduling decision includes: modifying the transmission power of the communication beam set based at least in part on the second scheduling decision for the second base station.

[0236] Example 24: A method as in Example 23, wherein modifying the transmit power of a communication beam set includes reducing the transmit power of the communication beam set to zero, or to a transmit power level indicated by an interference coordination message, or reducing the transmit power reduction level indicated by the interference coordination message based at least in part on a dynamically selected interference coordination scheme.

[0237] Example 25: A method as in any of Examples 23 or 24, wherein modifying the transmit power of a communication beam set comprises: determining, based on a second scheduling decision, one or more TTIs in which a second base station is scheduled to transmit to a specific UE, wherein the transmit power of the communication beam set is modified in the one or more TTIs.

[0238] Example 26: A method as in any of Examples 23 to 25, wherein the set of communication beams comprises a subset of the plurality of communication beams operated by the first base station.

[0239] Example 27: The method of Example 20, wherein the dynamically selected interference coordination scheme includes an interference beam avoidance scheme, and modifying the scheduling decision includes: suppressing operation using the communication beam set based at least in part on a second scheduling decision for a second base station.

[0240] Example 28: The method of Example 27 further includes: determining a communication beam set based at least in part on a cell identifier of a second base station indicated by an interference coordination message, or a base station identifier of a second base station, or a transmit / receive point identifier of a second base station, or one or more beam indices, or a combination thereof.

[0241] Example 29: A method as in any of Examples 27 or 28, wherein suppressing operation using the communication beam set includes: determining one or more TTIs in which a second base station is scheduled to transmit to a specific UE based on a second scheduling decision; and operating using a second communication beam set different from the communication beam set in the one or more TTIs.

[0242] Example 30: A method as in any one of Examples 27 to 29, wherein the set of communication beams comprises a subset of the plurality of communication beams operated by the first base station.

[0243] Example 31: A method for wireless communication at a UE, comprising: receiving a message from a serving base station, the message including an indication of a dynamically selected interference coordination scheme and an indication of a scheduling decision; transmitting an interference coordination message indicating the dynamically selected interference coordination scheme and the scheduling decision to at least a neighboring base station; and communicating with the serving base station based at least in part on the scheduling decision.

[0244] Example 32: The method of Example 31 further includes: detecting interference greater than a threshold interference level from a neighboring base station; and transmitting an interference message indicating the detected interference to a serving base station, wherein receiving the message from the serving base station is at least partially based on transmitting the interference message.

[0245] Example 33: A method as in any one of Examples 31 or 32, wherein receiving the message from the serving base station includes: receiving downlink control information from the serving base station notifying the UE to transmit an interference coordination message to at least a neighboring base station, wherein transmitting the interference coordination message is at least partially based on the downlink control information.

[0246] Example 34: A method as in any of Examples 31 or 32, wherein: receiving a message from a serving base station includes: receiving an interference coordination message from the serving base station; and transmitting the interference coordination message includes: relaying the interference coordination message from the serving base station to at least a neighboring base station.

[0247] Example 35: An apparatus for wireless communication includes at least one means for performing the method of any of Examples 1 to 11.

[0248] Example 36: An apparatus for wireless communication, comprising a processor; and a memory coupled to the processor, the processor and the memory configured to perform the method of any one of Examples 1 to 11.

[0249] Example 37: A non-transitory computer-readable medium storing code for wireless communication, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the device to perform a method as any one of Examples 1 to 11.

[0250] Example 38: An apparatus for wireless communication includes at least one means for performing the method of any of Examples 12 to 19.

[0251] Example 39: An apparatus for wireless communication, comprising a processor; and a memory coupled to the processor, the processor and the memory configured to perform the method of any one of Examples 12 to 19.

[0252] Example 40: A non-transitory computer-readable medium storing code for wireless communication, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the device to perform a method as in any one of Examples 12 to 19.

[0253] Example 41: An apparatus for wireless communication includes at least one means for performing the method of any of Examples 20 to 30.

[0254] Example 42: An apparatus for wireless communication, comprising a processor; and a memory coupled to the processor, the processor and the memory configured to perform the method of any one of Examples 20 to 30.

[0255] Example 43: A non-transitory computer-readable medium storing code for wireless communication, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the device to perform a method as in any one of Examples 20 to 30.

[0256] Example 44: An apparatus for wireless communication includes at least one means for performing the method of any of Examples 31 to 34.

[0257] Example 45: An apparatus for wireless communication, comprising a processor; and a memory coupled to the processor, the processor and the memory configured to perform the method of any one of Examples 31 to 34.

[0258] Example 46: A non-transitory computer-readable medium storing code for wireless communication, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the device to perform a method as in any one of Examples 31 to 34.

[0259] It should be noted that the methods described herein describe possible implementations, and that the operations may be rearranged or otherwise modified and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0260] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described may be applied to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0261] The information and signals described herein may be represented using any of a variety of different techniques and technologies. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0262] The various illustrative blocks and modules described in conjunction with the disclosure herein may be implemented or executed with a general purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0263] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Other examples and implementations fall within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features that implement the functions may also be physically located in various locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0264] Computer-readable medium includes both non-transient computer storage medium and communication medium, and it includes any medium that facilitates computer program to transfer from one place to another place.Non-transient storage medium can be any available medium that can be accessed by general or special-purpose computer.As an example and not limitation, non-transient computer-readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, disk storage or other magnetic storage device, or can be used to carry or store instruction or data structure form of desired program code means and can be accessed by general or special-purpose computer, or general or special-purpose processor any other non-transient medium.Any connection is also properly referred to as computer-readable medium.For example, if software is transmitted from website, server or other remote source using coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then this coaxial cable, optical fiber cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are just included in the definition of computer-readable medium. Disk and disc as used herein include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0265] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Similarly, as used herein, the phrase "based on" should not be interpreted as referring to a closed set of conditions. For example, an example operation described as "based on condition A" may be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0266] In the accompanying drawings, similar components or features may have the same reference number. In addition, various components of the same type may be distinguished by following the reference number with a dash and a second reference number that distinguishes between similar components. If only the first reference number is used in the specification, the description may apply to any of the similar components having the same first reference number regardless of the second reference number, or other subsequent reference numbers.

[0267] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that may be implemented or that fall within the scope of the claims. The term "example" as used herein means "used as an example, instance, or illustration" and does not mean "better than" or "better than other examples." This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0268] The description herein is provided to enable those skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the universal principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a first base station, comprising: dynamically selecting a beamforming interference coordination scheme for at least a second base station from a plurality of beamforming interference coordination schemes based at least in part on a communication parameter of a user equipment (UE) served by the first base station, the plurality of beamforming interference coordination schemes defining different configurations for communication beams used at the second base station; generating an interference coordination message based at least in part on the beamforming interference coordination scheme and a scheduling decision for the first base station; as well as The generated interference coordination message is transmitted to at least the second base station.

2. The method of claim 1, wherein the transmitting comprises: The generated interference coordination message is broadcasted to a plurality of base stations within a reception range of the first base station, the plurality of base stations including at least the second base station.

3. The method of claim 1, wherein the transmitting comprises: The generated interference coordination message is unicasted to a designated base station group including at least the second base station.

4. The method of claim 1, wherein the generating comprises: The payload of the interference coordination message is generated at least in part based on the beamforming interference coordination scheme or the scheduling decision for the first base station, or both, wherein the payload includes an indication of the beamforming interference coordination scheme, or a trigger for interference coordination, or a start time for interference coordination, or an end time for interference coordination, or a time duration for interference coordination, or a beam fixed time period for at least the second base station, or a frequency resource for transmission of the first base station, or a transmit power level of at least the second base station, or a transmit power reduction level of at least the second base station, or a UE priority value of the UE, or a data traffic priority value of the UE, or a cell identifier of the first base station, or a base station identifier of the first base station, or a transmit / receive point identifier of the first base station, or one or more beam indices, or a combination thereof.

5. The method of claim 1, wherein the transmitting comprises: The generated interference coordination message is transmitted via a wireless backhaul link, or an uplink channel, or a downlink channel, or a combination thereof.

6. The method of claim 1, wherein the communication parameter comprises a quality of service level for downlink transmission to the UE, the method further comprising: An identification is made that the quality of service level of the downlink transmission to the UE is greater than a threshold quality of service level, wherein determining to transmit the interference coordination message is based at least in part on the identification.

7. The method according to claim 1, wherein the communication parameter comprises a priority value of the UE, and the method further comprises: An identification is made that the priority value of the UE is greater than a threshold priority value, wherein determining to transmit the interference coordination message is based at least in part on the identification.

8. The method according to claim 1, wherein the communication parameter comprises a signal to interference ratio or a signal to interference plus noise ratio or both of the UE, and the method further comprises: Identifying that the signal-to-interference ratio or the signal-to-interference-plus-noise ratio, or both, of the UE is less than one or more thresholds, wherein determining to transmit the interference coordination message is based at least in part on the identification.

9. The method according to claim 1, wherein the communication parameter includes location information of the UE, and the method further comprises: Based at least in part on the location information, it is identified that the distance of the UE from the first base station is greater than a threshold distance, wherein determining to transmit the interference coordination message is based at least in part on the identification.

10. The method of claim 1, further comprising: Communicate with the UE based on the scheduling decision.

11. A method for wireless communication at a device in a wireless network, comprising: determining a communication parameter of a user equipment (UE) served by a serving base station or of the serving base station or both; dynamically selecting a beamforming interference coordination scheme for the serving base station and one or more neighboring base stations based at least in part on the communication parameters from a plurality of beamforming interference coordination schemes defining different configurations for communication beams used at the one or more neighboring base stations; as well as An indication of the dynamically selected beamforming interference coordination scheme is transmitted to the base station.

12. The method of claim 11, wherein the dynamically selected beamforming interference coordination scheme comprises an interference beam fixing scheme, and the transmitting comprises: An indication of a beam fixing time interval or a beam fixing periodicity, or both, of the interfering beam fixing scheme is transmitted.

13. The method of claim 11, wherein the dynamically selected beamforming interference coordination scheme comprises an interference beam suppression scheme, and wherein the transmitting comprises: An indication of a transmit power level or a transmit power reduction level, or both, for the interference beam suppression scheme is transmitted.

14. The method of claim 11, wherein the dynamically selected beamforming interference coordination scheme comprises an interference beam avoidance scheme, and wherein the transmitting comprises: An indication of one or more beam indices to be avoided by the interference beam avoidance scheme is transmitted.

15. The method of claim 11, wherein the transmitting comprises: An indication of whether to implement the dynamically selected beamforming interference coordination scheme, a start time to implement the dynamically selected beamforming interference coordination scheme, an end time to implement the dynamically selected beamforming interference coordination scheme, or a combination thereof is transmitted.

16. The method of claim 11, wherein the communication parameters include a quality of service level of downlink transmission from the serving base station to the UE, or a priority value of the UE, or a signal to interference ratio of the UE, or a signal to interference plus noise ratio of the UE, or location information of the UE relative to the serving base station, or a combination thereof.

17. The method of claim 11, wherein the device in the wireless network comprises a network entity and the base station comprises the serving base station, the determining further comprising: The communication parameters are received from the serving base station.

18. The method of claim 11, wherein the device in the wireless network comprises the serving base station, and the transmitting comprises: An interference coordination message is transmitted to the one or more neighboring base stations, wherein a payload of the interference coordination message is based at least in part on the dynamically selected beamforming interference coordination scheme.

19. A method for wireless communication at a first base station, comprising: receiving an interference coordination message from a second base station; determining a dynamically selected beamforming interference coordination scheme from a plurality of beamforming interference coordination schemes based at least in part on the interference coordination message, the plurality of beamforming interference coordination schemes defining different configurations for communication beams used at the first base station; modifying a scheduling decision based at least in part on the dynamically selected beamforming interference coordination scheme; as well as One or more user equipments (UEs) are communicated with according to the modified scheduling decision.

20. The method of claim 19, wherein the dynamically selected beamforming interference coordination scheme comprises an interference beam fixing scheme, and wherein the modifying comprises: Based at least in part on the beam fixing time interval or the beam fixing periodicity or both indicated by the interference coordination message, operating using each communication beam in the set of communication beams in a configured number of transmission time intervals.

21. The method of claim 19, wherein the dynamically selected beamforming interference coordination scheme comprises an interference beam suppression scheme, and wherein the modifying comprises: The transmit power of the set of communication beams is modified based at least in part on a second scheduling decision for the second base station.

22. The method of claim 21, modifying the transmit power of the communication beam set comprises: The transmit power of the set of communication beams is reduced to zero, to a transmit power level indicated by the interference coordination message, or to a transmit power reduction level indicated by the interference coordination message based at least in part on the dynamically selected beamforming interference coordination scheme.

23. The method of claim 21, modifying the transmit power of the communication beam set comprises: One or more transmission time intervals in which the second base station is scheduled to transmit to a specific UE are determined based on the second scheduling decision, wherein the transmit power of the communication beam set is modified in the one or more transmission time intervals.

24. The method of claim 19, wherein the dynamically selected beamforming interference coordination scheme comprises an interference beam avoidance scheme, and wherein the modifying comprises: Operating using the set of communication beams is refrained based at least in part on a second scheduling decision for the second base station.

25. The method of claim 24, further comprising: The communication beam set is determined at least in part based on a cell identifier of the second base station, a base station identifier of the second base station, a transmit / receive point identifier of the second base station, one or more beam indices, or a combination thereof indicated by the interference coordination message.

26. The method of claim 24, wherein the inhibiting comprises: determining, based on the second scheduling decision, one or more transmission time intervals in which the second base station is scheduled to transmit to a specific UE; as well as Operating using a second set of communication beams different from the set of communication beams during the one or more transmission time intervals.

27. A method for wireless communication at a user equipment (UE), comprising: receiving a message from a serving base station, the message comprising an indication of a dynamically selected beamforming interference coordination scheme from a plurality of beamforming interference coordination schemes defining different configurations for communication beams used at a neighboring base station and an indication of a scheduling decision; transmitting an interference coordination message indicating the dynamically selected beamforming interference coordination scheme and the scheduling decision to at least the neighboring base station; and Communicating with the serving base station based at least in part on the scheduling decision.

28. The method of claim 27, further comprising: detecting interference greater than a threshold interference level from the neighboring base station; as well as An interference message is transmitted to the serving base station indicating the detected interference, wherein receiving the message from the serving base station is based at least in part on transmitting the interference message.

29. The method of claim 27, wherein the receiving comprises: Downlink control information is received from the serving base station notifying the UE to transmit the interference coordination message to at least the neighboring base station, wherein transmitting the interference coordination message is based at least in part on the downlink control information.

30. The method of claim 27, wherein the receiving comprises: receiving the interference coordination message from the serving base station; as well as The transmission includes: The interference coordination message is relayed from the serving base station to at least the neighboring base station.

Images