On-demand interference management

Abstract

Systems, methods, and apparatus for wireless communication are described. A base station may transmit a first signal; after transmitting the first signal and during a listening interval, listen for a second signal from a user equipment (UE) affected by the first signal, the second signal indicating interference at the first UE; receive the second signal during the listening interval; and initiate an interference management procedure based on receiving the second signal.

Description

[0001] This application is a divisional application of the Chinese patent application with application number 201880031773.2 and application date May 17, 2018, entitled "On-demand interference management".

[0002] Cross-references

[0003] This patent application claims priority to U.S. patent application No. 15 / 981,076, filed on May 16, 2018, entitled “On-Demand Interference Management,” by Sadek et al., and U.S. provisional patent application No. 62 / 508,552, filed on May 19, 2017, entitled “On-Demand Interference Management,” by Sadek et al.; each of which has been assigned to the assignee of this application. Technical Field

[0004] The following generally relates to wireless communications, and more particularly, the following relates to on-demand interference management. Background Art

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, and the like. These systems are capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems may include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, and orthogonal frequency division multiple access (OFDMA) systems (e.g., Long Term Evolution (LTE) systems or New Radio (NR) systems). A wireless multiple-access communication system may include multiple base stations or access network nodes, each of which simultaneously supports communication for multiple communication devices (which may otherwise be referred to as user equipment (UE)).

[0006] A wireless node (e.g., a base station or UE) can use various interference management techniques to potentially reduce the amount of interference caused by wireless nodes on other nodes. One example of an interference management technique involves medium access control. A wireless node can perform a medium access control technique before communicating in a wireless multiple-access communication system. When the wireless node senses that the medium is available, the medium access control technique (e.g., listen-before-transmission (LBT)) provides the wireless node with access to the medium. If the medium is unavailable, the wireless node may delay its use of the medium due to other nodes' use of the medium. In many wireless multiple-access communication systems, the potential for interference is high, and therefore, interference management techniques (e.g., LBT) are performed by default. Summary of the Invention

[0007] Some wireless communication systems operating in the millimeter wave (mmW) frequency band rely on multiple antennas and beamforming techniques to increase the link budget between wireless nodes (e.g., between a base station and a user equipment (UE)). Compared to other communication systems (e.g., Long Term Evolution (LTE), Wireless Local Area Network (WLAN), etc.), these wireless communication systems may experience less interference. As a result, to mitigate interference to the UE, constantly applying existing medium access control techniques (e.g., listen before transmit (LBT)) or applying existing medium access control techniques by default may result in constant overhead. Furthermore, there may be instances in existing wireless communication systems (e.g., LTE, WLAN, etc.) where constant or default use of medium access control techniques may still result in excessive overhead.

[0008] A base station (e.g., a gNodeB (gNB)) can transmit synchronization signal bursts in multiple directions. In some cases, the base station can configure a listening interval to listen for signals from a UE. The listening interval can follow a synchronization signal burst. During the listening interval, the base station can receive signals from the UE that were affected by the synchronization signal burst transmission. As a result of receiving signals from the UE during the listening interval, the base station can initiate an interference management procedure associated with the UE, such as LBT. This on-demand initiation of an interference management procedure can be applied in a directional manner or based on frequency or time. Additionally, signals other than synchronization signal bursts can be used to trigger signals from the affected UE.

[0009] Alternatively, a UE may experience interference caused by another UE. In this case, the victim UE (i.e., the UE experiencing the interference) can notify the interfering UE of the interference. The interfering UE can send an interference management signal to the base station serving the interfering UE, thereby indicating that the interfering UE is initiating an interference management procedure (e.g., LBT). As a result, the base station can participate in the interference management procedure with the interfering UE.

[0010] Therefore, the present disclosure provides techniques to support on-demand interference management.Initiating on-demand interference management can reduce overhead and support enhanced coexistence, higher data rates, capacity, and spectral efficiency in wireless systems.

[0011] A method of wireless communication at a base station is described. The method may include: transmitting a first signal; after transmitting the first signal and during a listening interval, listening for a second signal from a first UE affected by the first signal, the second signal indicating interference at the first UE; receiving the second signal during the listening interval; and initiating an interference management procedure based at least in part on receiving the second signal.

[0012] An apparatus for wireless communication is described. The apparatus may include: means for transmitting a first signal; means for listening for a second signal from a first UE affected by the first signal and during a listening interval after transmitting the first signal, the second signal indicating interference at the first UE; means for receiving the second signal during the listening interval; and means for initiating an interference management procedure based at least in part on receiving the second signal.

[0013] Another apparatus for wireless communication is described. The apparatus may include: a processor; a memory in electronic communication with the processor; and instructions stored in the memory. The instructions may be operable to cause the processor to: transmit a first signal; after transmitting the first signal and during a listen interval, listen for a second signal from a first UE affected by the first signal, the second signal indicating interference at the first UE; receive the second signal during the listen interval; and initiate an interference management procedure based at least in part on receiving the second signal.

[0014] A non-transitory computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include instructions operable to cause a processor to: transmit a first signal; after transmitting the first signal and during a listening interval, listen for a second signal from a first UE affected by the first signal, the second signal indicating interference at the first UE; receive the second signal during the listening interval; and initiate an interference management procedure based at least in part on the receipt of the second signal.

[0015] In some examples of the above methods, apparatuses, and non-transitory computer-readable media, the first signal may be a synchronization signal associated with a burst of synchronization signals in multiple directions. Some examples of the above methods, apparatuses, and non-transitory computer-readable media for listening for a second signal may also include a process, feature, unit, or instruction for listening for the second signal in one or more symbols associated with the multiple directions of the burst of synchronization signals.

[0016] Some examples of the above-described methods, apparatus, and non-transitory computer-readable media for receiving a second signal may also include processes, features, units, or instructions for receiving the second signal in a symbol corresponding to one of multiple directions of a synchronization signal burst.

[0017] Some examples of the above-described methods, apparatuses, and non-transitory computer-readable media for initiating an interference management procedure may also include a process, feature, unit, or instruction for performing the interference management procedure in fewer than all of the multiple directions of the synchronization signal burst, but at least in one of the multiple directions corresponding to the symbol in which the second signal was received. Some examples of the above-described methods, apparatuses, and non-transitory computer-readable media may also include a process, feature, unit, or instruction for determining an offset between a listening interval and a synchronization signal burst.

[0018] In some examples of the above methods, apparatuses, and non-transitory computer-readable media, the first signal may be a synchronization signal sent using an assigned channel or during an assigned transmission time, or both. Some examples of the above methods, apparatuses, and non-transitory computer-readable media for listening for a second signal may also include processes, features, units, or instructions for the following operations: listening for the second signal using an assigned channel or during a listening interval associated with an assigned transmission time, or both. In some examples of the above methods, apparatuses, and non-transitory computer-readable media, the first signal may be a packet transmission, and wherein the listening interval may be immediately following a transmission time interval of the first signal. In some examples of the above methods, apparatuses, and non-transitory computer-readable media, the interference management process includes an LBT process in the direction of the first UE based at least in part on the direction of the received second signal. In some examples of the above methods, apparatuses, and non-transitory computer-readable media, the interference management process is performed in a direction, frequency, or timing associated with the received second signal of the first UE.

[0019] Some examples of the above-mentioned methods, devices and non-transitory computer-readable media may also include processes, features, units or instructions for the following operations: receiving an interference management signal from a second UE served by a base station, wherein the interference management signal indicates that: the second UE is initiating an additional interference management process at least in part based on the second UE receiving an additional signal from an additional UE, and the additional signal indicates interference at the additional UE; and participating in the additional interference management process of the second UE based at least in part on the received interference management signal.

[0020] Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include processes, features, units, or instructions for performing an LBT process in the direction of the second UE based at least in part on the direction of the received interference management signal.

[0021] Some examples of the above methods, apparatuses, and non-transitory computer-readable media for receiving a second signal may also include a process, feature, unit, or instruction for updating a transmission timer for an interference management process based at least in part on a time at which the second signal is received during a listening interval. Some examples of the above methods, apparatuses, and non-transitory computer-readable media may also include a process, feature, unit, or instruction for avoiding transmission to the first UE based at least in part on receiving the second signal when the base station is in contention mode.

[0022] A method for wireless communication at a victim UE is described. The method may include: identifying that a first signal from a base station is interfering with communications to or from the victim UE; and transmitting a second signal to the base station during a listening interval in which the base station listens for the second signal, the second signal indicating interference at the victim UE.

[0023] An apparatus for wireless communication is described. The apparatus may include means for identifying that a first signal from a base station is interfering with communications to or from the apparatus; and means for transmitting a second signal to the base station during a listening interval in which the base station listens for the second signal, the second signal indicating interference at the apparatus.

[0024] Another apparatus for wireless communication is described. The apparatus may include a processor; a memory in electronic communication with the processor; and instructions stored in the memory. The instructions are operable to cause the processor to: identify that a first signal from a base station is interfering with communications to or from the apparatus; and, during a listening interval in which the base station listens for the second signal, transmit a second signal to the base station, the second signal indicating interference at the apparatus.

[0025] A non-transitory computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include instructions operable to cause a processor to: identify that a first signal from a base station is interfering with communications to or from a victim UE; and, during a listening interval in which the base station listens for the second signal, transmit a second signal to the base station, the second signal indicating interference at the victim UE.

[0026] Some examples of the above-described methods, apparatuses, and non-transitory computer-readable media for transmitting a second signal to a base station may also include processes, features, units, or instructions for transmitting the second signal in a symbol associated with the direction of the first signal.

[0027] Some examples of the above-mentioned methods, apparatus, and non-transitory computer-readable media for identifying that a first signal from a base station is interfering with communications to or from a victim UE may also include processes, features, units, or instructions for determining that the first signal or communications to or from the victim UE meets a threshold value.

[0028] In some examples of the aforementioned methods, apparatuses, and non-transitory computer-readable media, the threshold value is associated with a signal-to-interference-and-noise ratio (SINR) value or a signal-to-noise ratio (SNR) of communications to or from the victim UE. In some examples of the aforementioned methods, apparatuses, and non-transitory computer-readable media, sending the second signal to the base station is based at least in part on the first signal satisfying the threshold value. In some examples of the aforementioned methods, apparatuses, or non-transitory computer-readable media, the second signal comprises a registration response (RRS) signal. In some examples of the aforementioned methods, apparatuses, or non-transitory computer-readable media, the second signal comprises interference power associated with a measurement in the RRS. In some examples of the aforementioned methods, apparatuses, or non-transitory computer-readable media, the first signal is associated with a synchronization signal burst. In some examples of the aforementioned methods, apparatuses, and non-transitory computer-readable media, identifying that the first signal from the base station is interfering with communications to or from the victim UE is based at least in part on performing radio resource monitoring (RRM) measurements on the synchronization signal burst.

[0029] A method of wireless communication at a first UE is described. The method may include: during a listening interval, listening for a first signal from a victim UE affected by communications to or from the first UE, the first signal indicating interference at the victim UE; receiving the first signal during the listening interval; and sending an interference management signal to a base station serving the first UE, the interference management signal indicating that the first UE is initiating an interference management procedure based at least in part on the first UE receiving the first signal from the victim UE.

[0030] An apparatus for wireless communication is described. The apparatus may include: means for listening, during a listening interval, for a first signal from a victim UE affected by communications to or from the apparatus, the first signal indicating interference at the victim UE; means for receiving the first signal during the listening interval; and means for sending an interference management signal to a base station serving the apparatus, the interference management signal indicating that the apparatus is initiating an interference management procedure based, at least in part, on the apparatus receiving the first signal from the victim UE.

[0031] Another apparatus for wireless communication is described. The apparatus may include a processor; a memory in electronic communication with the processor; and instructions stored in the memory. The instructions are operable to cause the processor to: during a listening interval, listen for a first signal from a victim UE affected by communications to or from the apparatus, the first signal indicating interference at the victim UE; receive the first signal during the listening interval; and send an interference management signal to a base station serving the apparatus, the interference management signal indicating that the apparatus is initiating an interference management procedure based at least in part on the apparatus receiving the first signal from the victim UE.

[0032] A non-transitory computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include instructions operable to cause a processor to: during a listening interval, listen for a first signal from a victim UE affected by communications to or from a first UE, the first signal indicating interference at the victim UE; receive the first signal during the listening interval; and send an interference management signal to a base station serving the first UE, the interference management signal indicating that the first UE is initiating an interference management procedure based at least in part on the first UE receiving the first signal from the victim UE.

[0033] Some examples of the above methods, apparatuses, and non-transitory computer-readable media may also include processes, features, units, or instructions for: receiving a registration request (RRQ) signal from a base station; and refraining from responding to the RRQ with uplink (UL) data or a registration response (RRS) signal based at least in part on receiving the first signal. In some examples of the above methods, apparatuses, and non-transitory computer-readable media, the interference management procedure is an LBT procedure in the direction of the base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figures 1 to 3

[0014] An example of a wireless communication system supporting interference management is shown according to aspects of the present disclosure.

[0035] Figure 4

[0014] An example of a frame structure supporting interference management is shown according to aspects of the present disclosure.

[0036] Figures 5 and 6An example of a process flow supporting interference management is shown according to aspects of the present disclosure.

[0037] Figures 7 to 9 A block diagram of a device supporting interference management is shown according to aspects of the present disclosure.

[0038] Figure 10

[0011] A block diagram of a system including a base station supporting interference management is shown in accordance with aspects of the present disclosure.

[0039] Figures 11 to 13 A block diagram of a device supporting interference management is shown according to aspects of the present disclosure.

[0040] Figure 14 A block diagram of a system including a user equipment (UE) supporting interference management is shown according to aspects of the present disclosure.

[0041] Figures 15 to 19 According to aspects of the present disclosure, a method for interference management is shown. DETAILED DESCRIPTION

[0042] A base station can communicate with one or more user equipment (UE) in a wireless system. The base station can be associated with a network operator. The base station can transmit synchronization signals associated with synchronization signal bursts. In some cases, the base station can be a gNodeB (gNB) and can transmit synchronization signal bursts in multiple directions (e.g., beamforming directions). That is, a synchronization signal burst can include multiple synchronization signals directed in different directions and transmitted during set time intervals. Alternatively, the base station can transmit synchronization signals (or even some other type of signal) using an assigned channel, during an assigned transmission time, or both. In these cases, after the transmission, the base station can listen for and receive signals from a UE (e.g., a victim UE) using the assigned channel, during a listening interval associated with the assigned transmission time, or both. In some cases, a UE can identify that the synchronization signal (or other signal) transmitted by the base station is interfering with communications to or from the UE. The base station can listen for UE signals (e.g., complaint signals) during the listening interval.

[0043] In some cases, the victim UE may determine whether to send a complaint signal to the base station. For example, before sending a complaint signal to the base station, the UE may determine that a signal-to-interference-and-noise ratio (SINR) value or a signal-to-noise ratio (SNR) value for communications to or from the UE is met despite interference caused by the synchronization signal. If the threshold is not met, the UE may send a signal (e.g., a complaint signal) to the base station. In some cases, the signal sent by the UE to the base station may be a registration response (RRS) signal. Alternatively, the UE may send a signal to the base station in a specific symbol of a frame, where the symbol may be associated with the direction of the synchronization signal received by the UE. In this case, the base station may monitor for signals from the UE in one or more symbols associated with multiple directions of the synchronization signal burst. In this way, the base station may receive a signal from the UE in a symbol corresponding to one of the multiple directions.

[0044] The base station may then trigger an interference management procedure. In some cases, the base station may initiate the interference management procedure based on receiving a signal from the UE indicating interference experienced at the UE. In some examples, the interference management procedure may be a listen-before-transmit (LBT) procedure. Based on the direction of the signal received from the UE, the LBT procedure may be in the direction of the UE. Additionally or alternatively, the base station may perform the interference management procedure in fewer directions than all directions of the transmitted synchronization signal burst. In this example, the base station may perform the interference management procedure in at least one of the multiple directions, the at least one direction corresponding to the symbol in which the signal indicating interference at the UE was received. The interference management procedure may also be performed in a frequency or timing associated with the signal received from the UE.

[0045] A UE may also experience interference due to another UE. In this case, the interfering UE causing the interference may listen for a signal from a victim UE that is affected by communications to or from the interfering UE. In some examples, the signal may indicate the interference at the victim UE. In addition, the interfering UE may listen for signals from the affected victim UE during a listening interval. The interfering UE may receive signals during the listening interval. In some cases, the interfering UE may send an interference management signal to the serving base station. The interference management signal may indicate that the interfering UE is initiating an interference management procedure (e.g., LBT). Therefore, the present disclosure provides techniques to support on-demand interference management. Triggering on-demand interference management in this manner may reduce overhead for the UE or base station by facilitating the execution of the interference management procedure on an on-demand basis (rather than as a default option).

[0046] Various aspects of the present disclosure are first described in the context of a wireless communication system. Next, exemplary UEs, base stations (e.g., evolved Node Bs (eNBs), gNBs), systems, and process flows supporting on-demand interference management are described. Various aspects of the present disclosure are further illustrated and described with reference to apparatus diagrams, system diagrams, and flow charts related to on-demand interference management.

[0047] Figure 1 An example of a wireless communication system 100 supporting interference management according to aspects of the present disclosure is shown. The wireless communication system 100 includes a base station 105, a UE 115, and a core network 130. In some examples, the wireless communication system 100 can be a Long Term Evolution (LTE), an Advanced LTE (LTE-A) network, or a New Radio (NR) network. In some cases, the wireless communication system 100 can support enhanced broadband communication, ultra-reliable (i.e., mission-critical) communication, low-latency communication, and communication with low-cost and low-complexity devices.

[0048] Base stations 105 can communicate wirelessly with UEs 115 via one or more base station antennas. Each base station 105 can provide communication coverage for a corresponding geographic coverage area 110. The communication links 125 shown in wireless communication system 100 can include uplink transmissions from UE 115 to base station 105 or downlink transmissions from base station 105 to UE 115. Control information and data can be multiplexed on uplink channels or downlinks according to various techniques. For example, control information and data can be multiplexed on downlink channels using time division multiplexing (TDM), frequency division multiplexing (FDM), or hybrid TDM-FDM techniques. In some examples, control information sent during a transmission time interval (TTI) of a downlink channel can be distributed in a concatenated manner across different control regions (e.g., between a common control region and one or more UE-specific control regions).

[0049] UEs 115 may be dispersed throughout the wireless communication system 100, and each UE 115 may be stationary or mobile. UE 115 may also be referred to as a mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, client, or some other appropriate terminology. UE 115 may also be a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a tablet computer, a laptop computer, a cordless phone, a personal electronic device, a handheld device, a personal computer, a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, a machine type communication (MTC) device, a home appliance, a motor vehicle, and the like.

[0050] Base stations 105 can communicate with core network 130 and with each other. For example, base stations 105 can interface with core network 130 via backhaul links 132 (e.g., S1, etc.). Base stations 105 can communicate with each other directly or indirectly (e.g., via core network 130) via backhaul links 134 (e.g., X2, etc.). Base stations 105 can perform radio configuration and scheduling for communications with UEs 115, or can operate under the control of a base station controller (not shown). In some examples, base stations 105 can be macro cells, small cells, hotspots, etc. Base stations 105 can also be referred to as eNBs.

[0051] The base station 105 may be connected to the core network 130 via an S1 interface. The core network may be an evolved packet core (EPC), which may include at least one mobility management entity (MME), at least one serving gateway (S-GW), and at least one packet data network (PDN) gateway (P-GW). The MME may be the control node that handles signaling between the UE 115 and the EPC. All user Internet Protocol (IP) packets may be transmitted through the S-GW, which itself may be connected to the P-GW. The P-GW may provide IP address allocation and other functions. The P-GW may connect to network operator IP services. Operator IP services may include the Internet, intranet, IP Multimedia Subsystem (IMS), and packet switched (PS) streaming services. The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.

[0052] One or more of the base stations 105 (e.g., base station 105-a) may include a base station interference manager 101 that may transmit a first signal; after transmitting the first signal and during a listening interval, listen for a second signal from a UE 115-a affected by the first signal, the second signal indicating interference at the UE 115-a; receive the second signal during the listening interval; and initiate an interference management procedure based on the receipt of the second signal. In some cases, the first signal is a synchronization signal associated with a synchronization signal burst in multiple directions. The synchronization signal burst may include multiple synchronization signals directed in different directions during a set transmission period.

[0053] UE 115-a and UE 115-b may also include UE interference manager 102, which may identify that a first signal from base station 105-a is interfering with communications to or from UE 115-a, UE 115-b, or both, and transmit a second signal to base station 105-a during a listening interval in which base station 105-a listens for the second signal. The second signal may indicate interference at UE 115-a, UE 115-b, or both.

[0054] For example, a base station 105-a having a base station interference manager 101 may transmit synchronization signal bursts in multiple directions. The base station 105-a may also configure a listening interval to listen for one or more signals from UEs 115-a and 115-b indicating that UE 115-a or 115-b or both are experiencing interference from one or more synchronization signals transmitted by the base station 105-a. The base station 105-a may receive a signal from UE 115-a or UE 115-b or both that UE 115 was affected by the synchronization signal burst transmission during the listening interval. As a result, the base station 105-a may initiate an interference management procedure, such as LBT, in a direction corresponding to UE 115-a or UE 115-b or both, or at a frequency or time associated with UE 115-a or UE 115-b or both.

[0055] Additionally or alternatively, the UE interference manager 102 of the UE 115-a may monitor, during a listening interval, a first signal from a UE 115 (e.g., UE 115-b) affected by communications to or from the listening UE 115-a, the first signal indicating interference at the victim UE 115-b; receive the first signal via the communication link 135 during the listening interval; and send an interference management signal to the base station 105-a serving the listening UE 115-a. In some cases, the interference management signal may indicate that the UE 115-a is initiating an interference management procedure based on the UE 115-a receiving the first signal from the UE 115-b.

[0056] For example, a UE 115-a having a UE interference manager 102 may monitor a signal from a UE 115-b indicating interference caused by the monitoring UE 115-a. In this case, the victim UE 115-b (i.e., the UE experiencing the interference) may notify the interfering UE 115-a of the interference. The interfering UE 115-a may transmit an interference management signal to the base station 105-a serving the interfering UE 115-a, indicating that the interfering UE 115-a is initiating an interference management procedure (e.g., LBT). Triggering on-demand interference management in this manner may reduce overhead and support enhanced coexistence, higher data rates, capacity, and spectral efficiency in the wireless communication system 100.

[0057] To facilitate directional communication between base station 105 and UE 115, wireless communication system 100 may use beams or beamformed signals for transmission and / or reception. Base station 105 may transmit beamformed signals on a downlink (DL) beam associated with base station 105. UE 115 may receive signals on one or more DL beams associated with UE 115. A DL beam associated with base station 105 and a DL beam associated with UE 115 used for DL ​​communication between base station 105 and UE 115 constitute a DL beam pair. Similarly, UE 115 may transmit beamformed signals on an uplink (UL) beam associated with UE 115. Base station 105 may receive signals on one or more UL beams associated with base station 105. A UL beam associated with UE 115 and a UL beam associated with base station 105 used for UL communication between UE 115 and base station 105 constitute a UL beam pair. The wireless communication system 100 can support millimeter wave (mmW) communications between a UE 115 and a base station 105. Devices operating in the mmW or extremely high frequency (EHF) bands may have multiple antennas to allow for beamforming. That is, the base station 105 can use multiple antennas or antenna arrays to perform beamforming operations for directional communications with the UE 115. Beamforming (which can also be referred to as spatial filtering or directional transmission) is a signal processing technique that can be used at a transmitter (e.g., a base station 105) to shape and / or steer an entire antenna beam in the direction of a target receiver (e.g., a UE 115). This can be achieved by combining the elements in the antenna array in such a way that transmitted signals at certain angles experience constructive interference while others experience destructive interference.

[0058] A multiple-input, multiple-output (MIMO) wireless system uses a transmission scheme between a transmitter (e.g., base station 105) and a receiver (e.g., UE 115) in which both are equipped with multiple antennas. Some portions of wireless communication system 100 may employ beamforming. For example, base station 105 may have an antenna array with multiple rows and columns of antenna ports that base station 105 can use for beamforming in communications between base station 105 and UE 115. Signals may be transmitted multiple times in different directions (e.g., each transmission may be beamformed in a different manner). An mmW receiver (e.g., UE 115) may attempt multiple beams (e.g., antenna subarrays) while receiving synchronization signals. In some cases, the antennas of base station 105 or UE 115 may be located within one or more antenna arrays that support beamforming or MIMO operations. One or more base station antennas or antenna arrays may be co-located at an antenna assembly (e.g., an antenna tower). In some cases, the antennas or antenna arrays associated with base station 105 may be located at different geographic locations. The base station 105 may use multiple antennas or antenna arrays to perform beamforming operations for directional communications with the UE 115 .

[0059] In some cases, the wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In the user plane, communications at the bearer or packet data convergence protocol (PDCP) layer may be IP-based. In some cases, the radio link control (RLC) layer may perform packet segmentation and reassembly for communication on logical channels. The medium access control (MAC) layer may perform priority processing and multiplex logical channels into transport channels. The MAC layer may also use hybrid automatic repeat request (HARQ) to provide retransmissions at the MAC layer to improve link efficiency. In the control plane, the radio resource control (RRC) protocol layer may provide for the establishment, configuration, and maintenance of RRC connections between the UE 115 and network equipment (e.g., base station 105 or core network 130 supporting radio bearers for user plane data). At the physical layer (PHY), transport channels may be mapped to physical channels.

[0060] The wireless communication system 100 can support operation across multiple cells or carriers, a feature that may be referred to as carrier aggregation (CA) or multi-carrier operation. A carrier may also be referred to as a component carrier (CC), layer, channel, etc. The terms "carrier," "component carrier," "cell," and "channel" are used interchangeably herein. A UE 115 may be configured with multiple downlink CCs and one or more uplink CCs for carrier aggregation. Carrier aggregation can be used with both frequency division duplex (FDD) and time division duplex (TDD) component carriers. In some cases, the wireless communication system 100 may utilize enhanced component carriers (eCCs). eCCs may be characterized by one or more features, including wider bandwidth, shorter symbol duration, shorter time interval (TTI), and modified control channel configuration. In some cases, eCCs may be associated with carrier aggregation or dual connectivity configurations (e.g., when multiple serving cells have suboptimal or non-ideal backhaul links). eCCs may also be configured for unlicensed spectrum or shared spectrum (where more than one operator is permitted to use the spectrum). An eCC characterized by wide bandwidth may include one or more segments that may be used by UEs 115 that are unable to monitor the entire bandwidth or prefer to use a limited bandwidth (eg, to save power).

[0061] Shared RF bands can be used for NR shared spectrum systems. For example, NR shared spectrum can utilize any combination of licensed spectrum, shared spectrum, and unlicensed spectrum. Flexibility in eCC symbol duration and subcarrier spacing can enable the use of eCCs across multiple spectrums. In some examples, NR shared spectrum can increase spectrum utilization and efficiency, particularly through dynamic vertical (e.g., across frequency) and horizontal (e.g., across time) sharing of resources.

[0062] Figure 2 An example of a wireless communication system 200 supporting interference management according to aspects of the present disclosure is shown. In some examples, the wireless communication system 200 can implement aspects of the wireless communication system 100. In some examples, the wireless communication system 200 can implement NR or other 5G cellular networks. The wireless communication system 200 can include a UE 215 and a base station 205, which can be reference Figure 1 One or more aspects of the UE 115 and base station 105 described herein. In some cases, the base station 205 may include a base station interference manager 201 and the UE 215 may include a UE interference manager 202, which may be as described in reference to Figure 1 One or more aspects of base station interference manager 101 and UE interference manager 102 are described.

[0063] Base station 205 may establish a connection with UE 215. In some cases, base station 205 may be a serving cell for UE 215. Additionally, base station 205 may be associated with a network operator. Base station 205 may engage in communications that interfere with UE 215. For example, base station 205 may transmit communication 245 that may be received by UE 215. In response to determining that communication 245 of base station 205 may interfere with communications at UE 215, UE 215 may communicate with base station 205 via communication 250. Base station 205, UE 215, or both may support on-demand interference management.

[0064] Base station 205 may transmit one or more signals or packets (e.g., data packets of a management packet) in the direction of UE 215 via communication 245. In some cases, the one or more signals may be synchronization signals. Furthermore, the synchronization signals may be associated with a synchronization signal burst or set. That is, base station 205 may transmit multiple synchronization signals directed in different directions during a predetermined duration. Base station 205 may transmit synchronization signals associated with a synchronization signal burst that may be received by UE 215. In some cases, base station 205 may be a mmW base station that may transmit beamformed transmissions on mmW communication beams in the direction of UE 215. Thus, transmissions from base station 205 may be beamformed transmissions or directional transmissions directed toward UE 215. Base station 205 may transmit synchronization signals in a synchronization signal burst in the direction of UE 215 using one or more mmW communication beams (e.g., communication 245). That is, base station 205 may transmit synchronization signal bursts in multiple directions (e.g., beamformed directions).

[0065] In some examples, base station 205 may additionally or alternatively transmit signals (e.g., DL transmissions) during different symbol periods of a frame or subframe. Base station 205 may be configured or have a preconfigured frame structure, in which base station 205 transmits certain signals during symbols, time slots, subframes, etc. The signals may be of any type, but in some cases may be synchronization signals. As an example, base station 205 may have multiple synchronization signal bursts during a synchronization burst period. Different synchronization signal bursts within a synchronization burst period may use the same or different amounts of frame resources. For example, some synchronization signal bursts in a set may use the same or different amounts of NR shared spectrum bandwidth. NR shared spectrum may utilize any combination of licensed spectrum, shared spectrum, and unlicensed spectrum.

[0066] The number of synchronization bursts can be consecutive or non-consecutive. For example, the base station 205 can be configured or pre-configured to transmit one or more synchronization signals in a burst in the direction of the UE 215 during one or more symbols of a subframe. For example, the base station can transmit a first synchronization signal during the first symbol period (e.g., symbol 0) of a time slot associated with the subframe, a second synchronization signal during the second symbol period (e.g., symbol 1) of the time slot, and so on. In some cases, the base station 205 can transmit signals (e.g., synchronization signals) in the direction of the UE 215 using an assigned channel (e.g., 28 GHz, 40 GHz, 60 GHz) or during an assigned transmission time, or both.

[0067] Base station 205 may configure a listening interval. In some examples, the listening interval may be a subinterval of the synchronization burst period. The listening interval may additionally or alternatively have an offset that defines a time interval following the synchronization burst period. That is, the listening interval may occur at a specified time after a synchronization signal burst, immediately after a synchronization signal burst, or before the next synchronization signal burst. For example, base station 205 may configure or have a preconfigured frame structure comprising 32 symbols to scan multiple beam directions for transmitting multiple synchronization signals in the direction of UE 215 and possibly other UEs (not shown) within the serving cell of base station 205. Additionally, the frame structure may include an additional 32 symbols associated with the listening interval. In some examples, base station 205 may calculate the listening interval so that two or more synchronization signal bursts are back-to-back. In some cases, base station 205 may configure the listening interval to occur at the end of a set of synchronization signal bursts.

[0068] In some cases, base station 205 may monitor for signals from UE 215 during a listening interval. Base station 205 may monitor for signals from UE 215 in one or more symbols of a subframe associated with multiple directions of a synchronization signal burst. For example, base station 205 may monitor for signals from UE 215 during the first symbol (e.g., symbol 0) of a slot or subframe associated with a first direction. The first symbol of the slot may correspond to a beam direction associated with a transmission in the direction of UE 215. In some cases, base station 205 may also monitor for signals from UE 215 during other symbol periods of the subframe.

[0069] UE 215 may monitor interference caused by base station 205. For example, UE 215 may identify that a signal / burst or packet transmission from base station 205 is interfering with communications to or from UE 215. In some cases, UE 215 may determine, based on monitoring, that the interference (e.g., signal or packet transmission) from base station 205 meets a threshold. Meeting the threshold may indicate that the interference is above or at a threshold. The threshold may also be associated with a SINR value or SNR for communications to or from UE 215. For example, the threshold may be associated with an SINR that falls below a threshold relative to the SNR. UE 215 may also determine interference based on performing radio resource monitoring (RRM) measurements on synchronization signal bursts or sets received from base station 205. For example, UE 215 may determine from a synchronization signal burst or set which direction or directions are causing the primary interference, i.e., which direction(s) meet the threshold. A synchronization signal burst may include multiple synchronization signals directed in different directions and transmitted by base station 205 during a set time interval. Additionally or alternatively, UE 215 can determine interference from base station 205 based on an interference duty cycle (eg, a function of both interference level and duty cycle).

[0070] UE 215 may initiate a mode for transmitting a signal to an interfering base station (e.g., base station 205) via communication 250. In some cases, UE 215 may transmit the signal to base station 205 via communication 250 during a listening interval of base station 205. For example, UE 215 may obtain a transmission schedule for a burst or set of synchronization signals, a listening interval, or both from base station 205. The signal may indicate to base station 205 that base station 205 is interfering with communications to or from UE 215. For example, UE 215 may identify that interference from base station 205 exceeds a threshold value; as a result, UE 215 may transmit a signal indicating the interference to base station 205. The signal indicating the interference transmitted from UE 215 to base station 205 may also be an RRS signal. The RRS signal may include interference power associated with RRM measurements made by the UE.

[0071] In some cases, when base station 205 sends a registration request (RRQ) signal to schedule UE 215, UE 215 may include interference power as a measurement in the RRS signal to assist base station 205 in data rate control. Based on the measurement information included in the RRS signal, base station 205 may refrain from transmitting if base station 205 is in contention mode. In this way, UE 215 may report a low interference level in the RRS signal. Alternatively, if base station 205 is already in transmission mode, UE 215 may report a high interference level in the RRS signal.

[0072] UE 215 may also communicate with base station 205 using one or more mmW communication beams. Thus, UE 215 may transmit a signal indicating interference to base station 205 using the mmW communication beams. In some cases, UE 215 may transmit a signal to base station 205 in a symbol associated with the direction of a signal (e.g., a synchronization signal or a packet transmission) received from base station 205. For example, base station 205 may have transmitted a synchronization signal in the direction of UE 215 during the first symbol (e.g., symbol 0) of a time slot or subframe associated with a first direction. UE 215 may identify the first symbol of the time slot or subframe associated with the first direction and transmit a signal indicating interference in the first symbol of the time slot or subframe associated with UE 215.

[0073] Base station 205 may receive signals on one or more UL beams associated with base station 205. The UL beam associated with UE 215 and the UL beam associated with base station 205, used for UL communication between UE 215 and base station 205, constitute a UL beam pair. Therefore, the first symbol of the UL beam of UE 215 may be associated with the same beamforming direction as the first symbol of the UL beam of base station 205. Additionally, UE 215 may receive a schedule associated with a synchronization signal burst or a listening interval, or both, from base station 205. In this case, UE 215 may transmit a signal corresponding to a symbol in a listening interval to base station 205 indicating interference, which base station 205 is to monitor based on the received schedule.

[0074] Base station 205 may initiate an interference management procedure based on receiving a signal (e.g., an RRS signal) from UE 215 while listening during the listening interval. If base station 205 receives a signal from UE 215 during the listening interval, base station 205 may initiate an interference management procedure during the next transmission period associated with sending an interference management signal in the direction of UE 215. In some cases, base station 205 may listen for a signal from UE 215 in one or more symbols associated with multiple directions of a synchronization signal burst transmission. In this way, base station 205 may receive a signal from UE 215 in a symbol corresponding to one of the multiple directions. In some examples, base station 205 may perform an interference management procedure in fewer than all of the multiple directions of the synchronization signal burst, but at least in one of the multiple directions corresponding to the symbol in which the signal was received from UE 215.

[0075] In some examples, the interference management procedure may be an LBT procedure. Based on the direction of the signal received from UE 215, the LBT procedure may be in the direction of UE 215. For example, base station 205 may have received a signal from UE 215 during the first symbol (e.g., symbol 0) of a time slot or subframe associated with a first direction. Base station 205 may identify the first symbol of the time slot or subframe associated with the first direction and send an interference management signal to UE 215 in the first symbol of the time slot or subframe associated with base station 205. In some cases, the interference management procedure may also be performed in the direction, frequency, or timing associated with the signal received from UE 215.

[0076] The base station 205 may also update a transmission timer used for the interference management process based on the reception time of a signal from the UE 215 during the listening interval. For example, if the base station 205 receives an RRS signal from the UE 215 at a time exceeding a threshold time associated with the transmission timer, the base station 205 may initiate an interference management process before sending an RRQ to the UE 215. In some cases, the base station 205 may update the transmission timer each time it receives a new signal (e.g., an RRS signal) from the UE 215. Alternatively, the base station 205 may update the transmission timer based on a moving average of multiple received signals (e.g., RRS signals) from the UE 215 during a time period. Thus, the present disclosure provides techniques for supporting on-demand interference management. Initiating on-demand interference management can reduce the overhead of the wireless communication system 200 and support enhanced coexistence, higher data rates, capacity, and spectral efficiency in the wireless communication system 200.

[0077] Figure 3 An example of a wireless communication system 300 supporting interference management according to aspects of the present disclosure is shown. In some examples, the wireless communication system 300 can implement aspects of the wireless communication system 100 or 200. In some examples, the wireless communication system 300 can implement NR or other 5G cellular networks. The wireless communication system 300 can include UE 315-a, UE 315-b, and base station 305, and UE 315-a, UE 315-b, and base station 305 can be reference UEs. Figure 1 or Figure 2 One or more aspects of the UE 115 or 215 and base station 105 or 205 described herein. In some cases, the base station 305 may include a base station interference manager 301, and the UEs 315-a and 315-b may include a UE interference manager 302, which may be as described in reference Figure 1 One or more aspects of base station interference manager 101 and UE interference manager 102 are described.

[0078] Base station 305 can communicate with UE 315-a. In some cases, base station 305 can be a serving cell for UE 315-a or UE 315-b, or both. In addition, base station 305 can be associated with a network operator. Base station 305 and UE 315-a can communicate with each other via communication link 350. For example, communication link 350 shown in wireless communication system 300 can include uplink transmissions from UE 315-a to base station 305, or downlink transmissions from base station 305 in the direction of UE 315-a. In addition, communication via communication link 350 may interfere with communication at UE 315-b. In some examples, UE 315-a and UE 315-b can be associated with the same or different network operators.

[0079] UE 315-a may communicate with UE 315-b via communication 355. For example, communication 3505 shown in wireless communication system 300 may include a transmission from UE 315-b to UE 315-a. In some cases, UE 315-b may be affected by communications to or from UE 315-a. In the context provided herein, UE 315-a may be an interfering UE, and UE 315-b may be a victim UE, i.e., a UE affected by communications to or from UE 315-a. Base station 305, UE 315-a, or UE 315-b, or a combination thereof, may support on-demand interference management.

[0080] In some cases, base station 305 may be a mmW base station that can send beamformed transmissions on mmW communication beams in the direction of UE 315-a or UE 315-b, or both. Thus, transmissions from base station 305 can be beamformed or directional transmissions directed toward UE 315-a or UE 315-b, or both. Similarly, UE 315-a or UE 315-b, or both, can communicate with each other or with base station 305 using beamformed transmissions on mmW communication beams.

[0081] UE 315-a may monitor a signal from UE 315-b. The signal may indicate that UE 315-b is experiencing interference due to communications from or to UE 315-a. For example, the signal may be an RRS signal. In some cases, UE 315-a may monitor a signal from UE 315-b during a listening interval. The listening interval may be associated with a plurality of symbols, time slots, or subframes, etc. In some examples, the listening interval may be based on a schedule (e.g., a transmission schedule) received and assigned by base station 305. UE 315-a may receive a signal from UE 315-b based on monitoring during the listening interval.

[0082] UE 315-a may notify the base station 305 of a signal received from UE 315-b. UE 315-a may notify the base station 305 by sending an interference management signal to the base station 305. The interference management signal may indicate that UE 315-a is initiating an interference management procedure based on the signal received from UE 315-b. The interference management procedure may be an LBT procedure in the direction of the base station 305. The base station 305 may receive the interference management signal from UE 315-a via the communication link 350. The base station 305 may also initiate an interference management procedure with the UE 315-a based on the received interference management signal. That is, the base station 305 may perform an interference management procedure in the direction of the UE 315-a based on the direction of the received interference management signal. For example, the base station 305 may trigger the LBT mode when serving UE 315-a.

[0083] In some cases, the base station 305 may send an RRQ signal to the UE 315-a. The UE 315-a may receive the RRQ from the base station 305. In some cases, based on receiving a signal from the UE 315-b, the UE 315-a may avoid responding to the RRQ with UL data or an RRS signal. For example, due to receiving an RRS signal from the UE 315-b, the UE Network Allocation Vector (NAV) field may be set; as a result, the UE 315-a may avoid responding to the RRQ signal received from the base station 305. In some cases, the UE 315-a may enable or disable an interference management process mode (e.g., LBT mode) for the base station 305 based on multiple signals (e.g., special RRS signals) received in a listening interval over a duration. Thus, the base station 305, the UE 315-a, or the UE 315-b, or a combination thereof, may support UE-to-UE on-demand interference management.

[0084] Figure 4 An example of a frame structure 400 that supports interference management is shown according to various aspects of the present disclosure. In some examples, the frame structure 400 can implement aspects of wireless communication systems 100 to 300. In some examples, as shown in FIG. Figures 1 to 3 As depicted, frame structure 400 may be associated with a UE or a base station.

[0085] The frame structure 400 may include a synchronization signal burst setup period 405. In some cases, the base station may transmit one or more synchronization signals to the UE during the synchronization signal burst setup period 405. Each of the multiple synchronization signals in the synchronization signal burst may point in a different direction and may be transmitted for a set duration. For example, the base station may transmit one or more synchronization signal bursts during one or more synchronization signal burst blocks 410 in the synchronization signal burst block 410. Each synchronization signal burst block 410 in the synchronization signal burst block 410 may be associated with bandwidth and resources. For example, some synchronization signal burst blocks 410 may have the same or different amounts of bandwidth of the NR shared spectrum. The NR shared spectrum may utilize any combination of licensed spectrum, shared spectrum, unlicensed spectrum, etc. In addition, the synchronization signal burst block 410 may have an associated duration. For example, each synchronization signal burst block 410 may have a length duration of 0.5 ms.

[0086] In some examples, frame structure 400 may include a listening interval 415. Listening interval 415 may include a first time slot (i.e., time slot 0) 420, a second time slot (i.e., time slot 1) 425, and a mini-slot 430. Each of time slots 420, 425, or 430, or a combination thereof, may include multiple symbols. For example, first time slot 420 and second time slot 425 may include 14 symbols. These symbols may be orthogonal frequency division multiplexing (OFDM) symbols. In some examples, each symbol associated with listening interval 415 may be associated with a direction. For example, the first symbol (e.g., symbol 0) of first time slot 420 may be associated with a first direction, the second symbol (e.g., symbol 1) of first time slot 420 may be associated with a second direction, the third symbol (e.g., symbol 2) of first time slot 420 may be associated with a third direction, and so on. Furthermore, the direction associated with each symbol of listening interval 415 may be associated with a transmission direction from a base station or a reception direction at a UE.

[0087] The UE may monitor interference from the base station. For example, the UE may identify that a synchronization signal burst block 410 from the base station is interfering with communications to or from the UE. In some cases, the UE may determine based on monitoring that the interference from the base station meets a threshold. Meeting the threshold may indicate that the interference is above or at a threshold. The threshold may also be associated with an SINR value or SNR for communications to or from the UE. For example, the threshold may be associated with an SINR that falls below a threshold relative to the SNR. The UE may also determine interference based on performing RRM measurements on the received synchronization signal burst block 410. For example, the UE may determine from the synchronization signal burst block 410 which direction or directions are causing the primary interference, i.e., which direction(s) are meeting the threshold.

[0088] The UE may initiate a pattern for transmitting a signal to an interfering base station. In some cases, the UE may transmit a signal to the base station during listening interval 415. The signal sent from the UE to the base station indicating interference may also be an RRS signal. The RRS signal may include interference power associated with RRM measurements performed by the UE. The UE may transmit the RRS signal to the base station in a symbol associated with the direction of a synchronization signal in a synchronization signal burst received from the base station (i.e., a symbol associated with the direction determined by the UE to be causing the primary interference). For example, the base station may have transmitted a synchronization signal to the UE during the first symbol (e.g., symbol 0) of a time slot or subframe associated with a first direction. The UE may identify the first symbol of the time slot or subframe associated with the first direction and transmit a signal indicating interference in the first symbol of a time slot or subframe during listening interval 415. The base station may receive the RRS signal and initiate an interference management procedure (e.g., LBT) with the UE. Thus, frame structure 400 may support on-demand interference management.

[0089] Figure 5 An example of a process flow 500 to support interference management is shown according to various aspects of the present disclosure. In some examples, the process flow 500 can implement aspects of wireless communication systems 100 to 300. Each of the UE 515 or the base station 505 can be a reference Figures 1 to 3 Examples of aspects of a respective one of a UE or a base station described herein. In some cases, the base station 505 may be a gNB. The base station 505 or the UE 515 or both may support on-demand interference management.

[0090] In the following description of process flow 500, operations between UE 515 or base station 505 may be sent in an order different from the exemplary order shown, or operations performed by UE 515 or base station 505 may be performed in a different order or at a different time. Certain operations may also be omitted from process flow 500, or other operations may be added to process flow 500.

[0091] At 520, base station 505 may transmit a synchronization signal burst in the direction of UE 515. In some cases, base station 505 may instead transmit a packet in the direction of UE 515. A synchronization signal burst may be associated with a synchronization signal burst set. A synchronization signal burst set may include multiple synchronization signals directed in different directions and transmitted by base station 505 during a set duration. That is, base station 505 may transmit multiple synchronization signals. In some cases, base station 505 may transmit a beamformed transmission on a mmW communication beam in the direction of UE 515. Thus, the transmission from base station 505 may be a beamformed transmission or a directional transmission directed toward UE 515. Base station 505 may transmit the synchronization signal burst in the direction of UE 515 using one or more mmW communication beams. That is, base station 505 may transmit the synchronization signal burst in multiple directions (e.g., beamformed directions).

[0092] The base station 505 may additionally or alternatively transmit synchronization signal bursts during different symbol periods of a frame or subframe. The base station 505 may be configured or have a preconfigured frame structure in which the base station 505 transmits synchronization signals in the direction of the UE 515 during different symbols of a time slot. The base station 505 may have multiple synchronization signal bursts during a synchronization burst period. Different synchronization signal bursts within a synchronization burst period may use the same or different amounts of frame resources. For example, some synchronization signal bursts in a set may use the same or different amounts of bandwidth.

[0093] At box 525, the base station 505 may initiate a listening interval. In some examples, the listening interval may be a subinterval of the synchronization burst period. The listening interval may additionally or alternatively have an offset. That is, the listening interval may occur at a specific time after the synchronization signal burst or immediately after the synchronization signal burst, or before the next synchronization signal burst. For example, the base station 505 may have a preconfigured frame structure including N number of symbols, where N is an integer to scan multiple beam directions for transmitting multiple synchronization signals in a synchronization signal burst in the direction of the UE 515. In addition, the frame structure may include an additional N symbols associated with the listening interval. In some examples, the base station 505 may calculate the listening interval so that two or more synchronization signal bursts are back-to-back.

[0094] At block 530, the UE 515 may identify interference. The UE 515 may monitor interference from the base station 505 during a listening interval. For example, the UE 515 may identify that signal transmissions from the base station 505 are interfering with communications to or from the UE 515. In some cases, the UE 515 may determine, based on the monitoring, that the interference from the base station 505 meets a threshold. Meeting the threshold may indicate that the interference is above the threshold. The threshold may also be associated with a SINR value or SNR of communications to or from the UE 515. The UE 515 may also determine interference based on performing RRM measurements on synchronization signal bursts received from the base station 505. For example, the UE 515 may determine from the synchronization signal bursts which directions are causing the primary interference, i.e., which directions meet the threshold.

[0095] At 535, UE 515 may transmit an RRS signal to base station 505 during the base station 505's listening interval. The signal may indicate to base station 505 that base station 505 is providing interference to communications to or from UE 515. UE 515 may also communicate with base station 505 using one or more mmW communication beams. UE 515 may transmit the RRS signal indicating interference to base station 505 using the mmW communication beams. In some cases, UE 515 may transmit the signal to base station 505 in a symbol associated with the direction of a synchronization signal burst received from base station 505. For example, base station 505 may have transmitted a synchronization signal burst in the direction of UE 515 during one or more symbols (e.g., symbols 0-4) of a time slot or subframe associated with the direction toward UE 515. The UE 515 may identify one or more symbols of a time slot or subframe associated with a direction and transmit an RRS signal indicating interference in corresponding one or more symbols (eg, symbols 0-4) of the time slot or subframe associated with the UE 515 .

[0096] At block 540, the base station 505 may receive an RRS signal during the listening interval. At block 545, the base station 505 may initiate an interference management procedure. For example, the base station 505 may initiate the interference management procedure based on receiving an RRS signal from the UE 515 while listening during the listening interval. In some cases, the base station 505 may listen for an RRS signal from the UE 515 in one or more symbols associated with multiple directions of the synchronization signal burst transmission. In this way, the base station 505 may receive an RRS signal from the UE 515 in a symbol corresponding to one of the multiple directions. In some examples, the base station 505 may perform the interference management procedure in fewer than all of the multiple directions of the synchronization signal burst, but at least in one of the multiple directions corresponding to the symbol in which the signal was received from the UE 515.

[0097] Figure 6 An example of a process flow 600 to support interference management is shown according to various aspects of the present disclosure. In some examples, the process flow 600 can implement aspects of wireless communication systems 100 to 300. Each of the UE 615-a, UE 615-b, or base station 605 can be a reference Figures 1 to 3 Examples of aspects of a respective one of a UE or a base station are described. In some cases, the base station 605 can be a gNB. The base station 605, the UE 615-a, or the UE 615-b, or a combination thereof can support on-demand interference management.

[0098] In the following description of process flow 600, operations between UE 615-a, UE 615-b, or base station 605 may be sent in an order different from the exemplary order shown, or operations performed by UE 615-a, UE 615-b, or base station 605 may be performed in a different order or at a different time. Certain operations may also be omitted from process flow 600, or other operations may be added to process flow 600.

[0099] At 620, transmissions may be occurring between UE 615-b and base station 605. For example, UE 615-b may send UL data to base station 605, and base station 605 may receive UL data from UE 615-b. Additionally or alternatively, base station 605 may send DL data to UE 615-b, and UE 615-b may receive DL data from base station 605. In some cases, base station 605 or UE 615-b, or both, may send beamformed transmissions to base station 605 or UE 615-b on mmW communication beams. Thus, transmissions from base station 605 or UE 615-b, or both, may be beamformed transmissions or directional transmissions directed toward base station 605 or UE 615-b. In some cases, base station 605 may send a transmission schedule to UE 615-b. At block 625, UE 615-b may initiate a listening interval. The listening interval may occur sometime after or immediately after a transmission, or immediately before the next transmission to or from the base station 605 .

[0100] At box 630, UE 615-a can identify interference. UE 615-a can monitor interference from UE 615-b during the listening interval. For example, UE 615-b can identify that signal transmissions from 615-b are interfering with communications to or from UE 615-a. In some cases, UE 615-a can determine that the interference from 615-b meets a threshold based on monitoring. Meeting the threshold can indicate that the interference is above the threshold. The threshold can also be associated with an SINR value or SNR of communications to or from 615-a. In some cases, UE 615-a can also determine interference based on performing RRM measurements on transmissions received from UE 615-b. For example, UE 615 can determine from the received transmissions which directions are causing the main interference, i.e., meeting the threshold.

[0101] At 635, UE 615-a may send an RRS signal to UE 615-b. The signal may indicate to UE 615-b that UE 615-b is providing interference to communications to or from UE 615-a. UE 615-a may also communicate with UE 615-b using one or more mmW communication beams. UE 615-b may send an RRS signal indicating interference to UE 615-a using the mmW communication beams. At box 640, UE 615-b may receive the RSS signal during the listening interval. At 645, UE 615-b may send an interference management signal to base station 605. The interference management signal may indicate to base station 605 that UE 615-b is initiating an interference management procedure (e.g., LBT) in response to receiving the RRS signal from UE 615-a.

[0102] At box 650, UE 615-b may initiate an interference management process. The interference management process may be an LBT process in the direction of base station 605. At box 655, base station 605 may receive an interference management signal 645 from UE 615-b. At box 660, the base station may initiate an interference management process. That is, base station 605 may also initiate an interference management process with UE 615-b based on the received interference management signal. Thus, base station 605 may perform an interference management process in the direction of UE 615-b based on the direction of the received interference management signal. For example, base station 605 may trigger LBT mode when serving UE 615-b. Thus, base station 605, UE 615-a, or UE 615-b, or a combination thereof, may support UE-to-UE on-demand interference management.

[0103] Figure 7A block diagram 700 of a wireless device 705 supporting interference management is shown according to aspects of the present disclosure. The wireless device 705 can be an example of aspects of the base station 105 as described herein. The wireless device 705 can include a receiver 710, a base station interference manager 715, and a transmitter 720. The wireless device 705 can also include a processor. Each of these components can communicate with each other (e.g., via one or more buses).

[0104] The receiver 710 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 on-demand interference management). The information may be passed to other components of the device. The receiver 710 may be a reference Figure 10 Examples of various aspects of the transceiver 1035 are described. The receiver 710 may use a single antenna or a collection of antennas.

[0105] The base station interference manager 715 and / or at least some of its various subcomponents may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functionality of the base station interference manager 715 and / or at least some of its various 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 units, discrete hardware components, or any combination thereof, designed to perform the functions described in this disclosure.

[0106] The base station interference manager 715 and / or at least some of its various subcomponents can be physically located in various locations, including being distributed such that portions of the functionality are implemented by one or more physical devices at different physical locations. In some examples, according to various aspects of the present disclosure, the base station interference manager 715 and / or at least some of its various subcomponents can be separate and distinct components. In other examples, according to various aspects of the present disclosure, the base station interference manager 715 and / or at least some of its various subcomponents can 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.

[0107] The base station interference manager 715 may, after sending the first signal and during a listening interval, listen for a second signal from the first UE affected by the first signal, the second signal indicating interference at the first UE, receive the second signal during the listening interval; and initiate an interference management process based on the reception of the second signal.

[0108] The transmitter 720 may transmit signals generated by other components of the device. In some examples, the transmitter 720 may be co-located with the receiver 710 in a transceiver module. For example, the transmitter 720 may be a reference Figure 10 Examples of various aspects of the transceiver 1035 described herein. The transmitter 720 can use a single antenna or a set of antennas. The transmitter 720 can transmit a first signal. In some cases, the first signal is a synchronization signal associated with a synchronization signal burst in multiple directions. In some cases, the synchronization signal burst can include multiple synchronization signals directed in different directions and transmitted during a set duration. In some cases, the first signal is a synchronization signal transmitted using an assigned channel or during an assigned transmission time, or both. In some cases, the first signal is a packet transmission, and wherein the listening interval immediately follows a transmission time interval of the first signal.

[0109] Figure 8 A block diagram 800 of a wireless device 805 supporting interference management is shown according to aspects of the present disclosure. The wireless device 805 may be a reference Figure 7 Examples of aspects of the wireless device 705 or base station 105 are described. The wireless device 805 may include a receiver 810, a base station interference manager 815, and a transmitter 820. The wireless device 805 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0110] The receiver 810 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 on-demand interference management). The information may be passed to other components of the device. The receiver 810 may be a reference Figure 10 Examples of various aspects of the transceiver 1035 are described. The receiver 810 may use a single antenna or a collection of antennas.

[0111] Base station interference manager 815 may be a reference Figure 7An example of an aspect of the base station interference manager 715 is described. The base station interference manager 815 may also include a listening component 825 and an interference component 830. The listening component 825 may, after transmitting the first signal and during a listening interval, listen for a second signal from a first UE affected by the first signal, the second signal indicating interference at the first UE, and receive the second signal during the listening interval. The listening component 825 may listen for the second signal in one or more symbols associated with multiple directions of a synchronization signal burst. In some cases, the listening component 825 may receive the second signal in a symbol corresponding to one of the multiple directions of the synchronization signal burst and listen for the second signal using an assigned channel or during a listening interval associated with an assigned transmission time, or both.

[0112] Interference component 830 may perform an interference management procedure in fewer than all directions of the plurality of directions of the synchronization signal burst, but in at least one direction of the plurality of directions corresponding to the symbol in which the second signal was received. Interference component 830 may initiate an interference management procedure based on receipt of the second signal. In some cases, interference component 830 may receive an interference management signal from a second UE served by the base station, the interference management signal indicating that the second UE is initiating an additional interference management procedure based on the second UE receiving an additional signal from an additional UE. The additional signal may indicate interference at the additional UE. Interference component 830 may participate in the additional interference management procedure with the second UE based on the received interference management signal, and perform a LBT procedure in the direction of the second UE based on the direction of the received interference management signal. In some cases, the interference management procedure includes an LBT procedure in the direction of the first UE based on the direction of the received second signal. In some cases, the interference management procedure is performed in the direction, frequency, or timing associated with the second signal received by the first UE.

[0113] The transmitter 820 may transmit signals generated by other components of the device. In some examples, the transmitter 820 may be co-located with the receiver 810 in a transceiver module. For example, the transmitter 820 may be a reference Figure 10 Examples of various aspects of the transceiver 1035 are described. The transmitter 820 may use a single antenna or a collection of antennas.

[0114] Figure 9 A block diagram 900 of a base station interference manager 915 supporting interference management is shown according to aspects of the present disclosure. The base station interference manager 915 may be a reference Figure 7 、 Figure 8 and Figure 10Examples of aspects of base station interference manager 715, base station interference manager 815, or base station interference manager 1015 are described. Base station interference manager 915 may include a listening component 920, an interference component 925, an offset component 930, a timer component 935, and an avoidance component 940. Each of these modules can communicate with each other, directly or indirectly (e.g., via one or more buses).

[0115] The listening component 920 may, after transmitting the first signal and during a listening interval, listen for a second signal from the first UE affected by the first signal, the second signal indicating interference at the first UE. In some cases, the listening component 920 may receive the second signal during the listening interval. The listening component 920 may listen for the second signal in one or more symbols associated with multiple directions of the synchronization signal burst and receive the second signal in a symbol corresponding to one of the multiple directions of the synchronization signal burst. In some examples, the listening component 920 may listen for the second signal using an assigned channel or during a listening interval associated with an assigned transmission time, or both.

[0116] Interference component 925 may perform an interference management procedure in fewer than all directions of the synchronization signal burst, but in at least one direction of the plurality of directions corresponding to the symbol of the second signal received. Interference component 925 may initiate an interference management procedure based on receipt of the second signal. Interference component 925 may receive an interference management signal from a second UE served by the base station, the interference management signal indicating that the second UE is initiating an additional interference management procedure based on the second UE receiving an additional signal from an additional UE, the additional signal indicating interference at the additional UE. Interference component 925 may participate in the additional interference management procedure with the second UE based on the received interference management signal, and perform a LBT procedure in the direction of the second UE based on the direction of the received interference management signal. In some cases, the interference management procedure includes an LBT procedure in the direction of the first UE based on the direction of the received second signal. In some cases, the interference management procedure is performed in the direction, frequency, or timing associated with the received second signal of the first UE.

[0117] An offset component 930 can determine an offset between a listening interval and a synchronization signal burst. A timer component 935 can update a transmission timer for an interference management process based on a time of receipt of a second signal during the listening interval. An avoidance component 940 can avoid transmitting to a first UE based on receiving the second signal when the base station is in contention mode.

[0118] Figure 10A diagram of a system 1000 including a device 1005 supporting interference management is shown according to aspects of the present disclosure. The device 1005 may be as described above (e.g., with reference to FIG. Figure 7 and Figure 8 ) or includes components of wireless device 705, wireless device 805, or base station 105. Device 1005 may include components for two-way voice and data communication, including components for sending and receiving communications, including a base station interference manager 1015, a processor 1020, a memory 1025, software 1030, a transceiver 1035, an antenna 1040, a network communication manager 1045, and an inter-station communication manager 1050. These components may communicate electronically via one or more buses (e.g., bus 1010). Device 1005 may wirelessly communicate with one or more UEs 115.

[0119] Processor 1020 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, discrete gate or transistor logic devices, discrete hardware components, or any combination thereof). In some cases, processor 1020 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into processor 1020. Processor 1020 may be configured to execute computer-readable instructions stored in memory to perform various functions (e.g., functions or tasks supporting on-demand interference management).

[0120] Memory 1025 may include random access memory (RAM) and read-only memory (ROM). Memory 1025 may store computer-readable, computer-executable software 1030, which includes instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, memory 1025 may contain, among other things, a basic input / output system (BIOS), which may control basic hardware or software operations, such as interaction with peripheral components or devices. Software 1030 may include code for implementing various aspects of the present disclosure, including code for supporting on-demand interference management. Software 1030 may be stored in a non-transitory computer-readable medium, such as system memory or other memory. In some cases, software 1030 may not be directly executable by the processor, but may instead cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0121] As described above, the transceiver 1035 can communicate bidirectionally via one or more antennas, wired or wireless links. For example, the transceiver 1035 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1035 can also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, as well as demodulate packets received from the antenna. In some cases, the wireless device can include a single antenna 1040. However, in some cases, the device can have more than one antenna 1040, which can send or receive multiple wireless transmissions simultaneously.

[0122] The network communication manager 1045 can manage communications with the core network (e.g., via one or more wired backhaul links). For example, the network communication manager 1045 can manage the transmission of data communications for client devices, such as one or more UEs 115. The inter-site communication manager 1050 can manage communications with other base stations 105 and can include a controller or scheduler for coordinating with other base stations 105 to control communications with the UEs 115. For example, the inter-site communication manager 1050 can coordinate the scheduling of transmissions to the UEs 115 for various interference mitigation techniques, such as beamforming and / or joint transmission. In some examples, the inter-site communication manager 1050 can provide an X2 interface within a Long Term Evolution (LTE) / LTE-A wireless communication network technology to provide communications between the base stations 105.

[0123] Figure 11 A block diagram 1100 of a wireless device 1105 supporting interference management is shown according to aspects of the present disclosure. The wireless device 1105 can be an example of aspects of the UE 115 as described herein. The wireless device 1105 can include a receiver 1110, a UE interference manager 1115, and a transmitter 1120. The wireless device 1105 can also include a processor. Each of these components can communicate with each other (e.g., via one or more buses).

[0124] The receiver 1110 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 on-demand interference management). The information may be passed to other components of the device. The receiver 1110 may be a reference Figure 14 Examples of various aspects of the transceiver 1435 are described. The receiver 1110 may use a single antenna or a collection of antennas.

[0125] The UE interference manager 1115 and / or at least some of its various subcomponents may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functionality of at least some of the UE interference manager 1115 and / or its various 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 units, discrete hardware components, or any combination thereof.

[0126] The UE interference manager 1115 and / or at least some of its various subcomponents can be physically located in various locations, including being distributed so that some of the functionality is implemented by one or more physical devices at different physical locations. In some examples, according to various aspects of the present disclosure, the UE interference manager 1115 and / or at least some of its various subcomponents can be separate and distinct components. In other examples, according to various aspects of the present disclosure, the UE interference manager 1115 and / or at least some of its various subcomponents can 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.

[0127] The UE interference manager 1115 may identify that a first signal from a base station is interfering with communications to or from the wireless device 1105, and transmit a second signal to the base station during a listening interval in which the base station listens for the second signal, the second signal indicating interference at the wireless device 1105. The UE interference manager 1115 may also listen, during the listening interval, for a first signal from a victim UE affected by communications to or from the wireless device 1105, the first signal indicating interference at the victim UE, receive the first signal during the listening interval, and transmit an interference management signal to a base station serving the wireless device 1105, the interference management signal indicating that the wireless device 1105 is initiating an interference management procedure based on the wireless device 1105 receiving the first signal from the victim UE.

[0128] The transmitter 1120 may transmit signals generated by other components of the device. In some examples, the transmitter 1120 may be co-located with the receiver 1110 in a transceiver module. For example, the transmitter 1120 may be a reference Figure 14 Examples of various aspects of the transceiver 1435 are described. The transmitter 1120 may use a single antenna or a collection of antennas.

[0129] Figure 12A block diagram 1200 of a wireless device 1205 supporting interference management is shown according to aspects of the present disclosure. The wireless device 1205 may be a reference Figure 11 Examples of aspects of the wireless device 1105 or UE 115 are described. The wireless device 1205 may include a receiver 1210, a UE interference manager 1215, and a transmitter 1220. The wireless device 1205 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0130] The receiver 1210 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 on-demand interference management). The information may be passed to other components of the device. The receiver 1210 may be a reference Figure 14 Examples of various aspects of the transceiver 1435 are described. The receiver 1210 may use a single antenna or a collection of antennas.

[0131] UE Interference Manager 1215 may be a reference Figure 11 An example of aspects of a UE interference manager 1115 is described. The UE interference manager 1215 may also include an interference component 1225 and a listening component 1230. The interference component 1225 may identify that a first signal from a base station is interfering with communications to or from the wireless device 1205 and send a second signal to the base station indicating that the base station is interfering with the wireless device 1205. In some cases, the first signal is associated with a synchronization signal burst. In some cases, identifying that the first signal from the base station is interfering with communications to or from the victim UE is based on performing RRM measurements on the synchronization signal burst. In some cases, the interference management procedure is a LBT procedure in the direction of the base station. In other instances, when the wireless device 1205 receives the first signal (e.g., an interference complaint signal) from a different victim UE, the wireless device 1205 may send an interference management signal to the base station serving the wireless device 1205, indicating that the wireless device 1205 is initiating an interference management procedure based on the wireless device 1205 receiving the first signal from the victim UE.

[0132] The listening component 1230 can listen, during a listening interval, for a first signal from a victim UE affected by communications to or from the wireless device 1205, the first signal indicating interference at the victim UE, and receive the first signal during the listening interval.

[0133] The transmitter 1220 may transmit signals generated by other components of the device. In some examples, the transmitter 1220 may be co-located with the receiver 1210 in a transceiver module. For example, the transmitter 1220 may be a reference Figure 14Examples of various aspects of the transceiver 1435 are described. The transmitter 1220 may use a single antenna or a collection of antennas.

[0134] Figure 13 A block diagram 1300 of a UE interference manager 1315 supporting interference management is shown according to aspects of the present disclosure. The UE interference manager 1315 may be a reference Figure 11 、 Figure 12 and Figure 14 14. An example of aspects of the UE interference manager 1415 is described. The UE interference manager 1315 may include an interference component 1320, a listening component 1325, a threshold component 1330, and a registration component 1335. Each of these modules may communicate with each other directly or indirectly (eg, via one or more buses).

[0135] Interference component 1320 can identify that a first signal from a base station is interfering with communications to or from a UE, and send a second signal to the base station indicating that the base station is interfering with the UE. In some cases, the first signal is associated with a synchronization signal burst. In some cases, identifying that the first signal from the base station is interfering with communications to or from a victim UE is based on performing RRM measurements on the synchronization signal burst. In some cases, the interference management procedure is an LBT procedure in the direction of the base station. In other instances where the UE receives a first signal (e.g., an interference complaint signal) from a different victim UE, the UE can send an interference management signal to the base station serving the UE, the interference management signal indicating that the UE is initiating an interference management procedure based on the UE receiving the first signal from the victim UE.

[0136] The listening component 1325 can listen, during a listening interval, for a first signal from a victim UE affected by communications to or from the UE, the first signal indicating interference at the victim UE; and receive the first signal during the listening interval.

[0137] Threshold component 1330 can determine that the first signal or the communication to or from the victim UE meets a threshold value. In some cases, the threshold value is associated with the SINR value or SNR of the communication to or from the victim UE. In some cases, sending the second signal to the base station is based on the first signal meeting the threshold value. Registration component 1335 can receive an RRQ from the base station and, based on receiving the first signal, refrain from responding to the RRQ with UL data or an RRS signal.

[0138] Figure 14 A diagram of a system 1400 including a device 1405 supporting interference management is shown according to aspects of the present disclosure. The device 1405 may be as described above (e.g., with reference to FIG. Figure 114. The device 1405 may include components for two-way voice and data communication, including components for sending and receiving communications, including a UE interference manager 1415, a processor 1420, memory 1425, software 1430, a transceiver 1435, an antenna 1440, and an I / O controller 1445. These components may communicate electronically via one or more buses, such as bus 1410. The device 1405 may communicate wirelessly with one or more base stations 105.

[0139] Processor 1420 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 device, a discrete hardware component, or any combination thereof). In some cases, processor 1420 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into processor 1420. Processor 1420 may be configured to execute computer-readable instructions stored in memory to perform various functions (e.g., functions or tasks supporting on-demand interference management).

[0140] Memory 1425 may include RAM and ROM. Memory 1425 may store computer-readable, computer-executable software 1430, which includes instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, memory 1425 may contain, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0141] The software 1430 may include code for implementing various aspects of the present disclosure, including code for supporting on-demand interference management. The software 1430 may be stored in a non-transitory computer-readable medium such as system memory or other memory. In some cases, the software 1430 may not be directly executable by a processor, but may enable a computer (e.g., when compiled and executed) to perform the functions described herein.

[0142] As described above, the transceiver 1435 can communicate bidirectionally via one or more antennas, wired or wireless links. For example, the transceiver 1435 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1435 can also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, as well as demodulate packets received from the antenna. In some cases, the wireless device can include a single antenna 1440. However, in some cases, the device can have more than one antenna 1440, which can send or receive multiple wireless transmissions simultaneously.

[0143] I / O controller 1445 can manage input and output signals for device 1405. I / O controller 1445 can also manage peripheral devices that are not integrated into device 1405. In some cases, I / O controller 1445 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 1445 can use an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS / 2®, UNIX®, LINUX® or other known operating systems. In other cases, I / O controller 1445 can represent a modem, keyboard, mouse, touch screen or similar device or interact with these devices. In some cases, I / O controller 1445 can be implemented as a part for a processor. In some cases, a user can interact with device 1405 via I / O controller 1445 or via a hardware component controlled by I / O controller 1445.

[0144] Figure 15 15. A flowchart illustrating a method 1500 for interference management according to aspects of the present disclosure is shown. As described herein, the operations of the method 1500 may be implemented by the base station 105 or a component thereof. For example, the operations of the method 1500 may be implemented by reference to Figures 7 to 10 In some examples, the base station 105 may execute a code set to control the functional units of the device to perform the functions described below. Additionally or alternatively, the base station 105 may use dedicated hardware to perform aspects of the functions described below.

[0145] At block 1505, the base station 105 may transmit a first signal. The operations of block 1505 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1505 may be performed as described with reference to Figures 7 to 10 The transmitter described is implemented.

[0146] At block 1510, the base station 105 may, after transmitting the first signal and during the listening interval, listen for a second signal from a first user equipment (UE) affected by the first signal, the second signal indicating interference at the first UE. The operations of block 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1510 may be as described with reference to Figures 7 to 10 The listening component described is executed.

[0147] At block 1515, the base station 105 may receive the second signal during the listening interval. The operations of block 1515 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1515 may be as described with reference to Figures 7 to 10 The listening component described is executed.

[0148] At block 1520, the base station 105 may initiate an interference management process based on the reception of the second signal. The operations of block 1520 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1520 may be as described with reference to Figures 7 to 10 The described interference components are performed.

[0149] Figure 16 A flow chart illustrating a method 1600 for interference management according to aspects of the present disclosure is shown. As described herein, the operations of the method 1600 may be implemented by the base station 105 or a component thereof. For example, the operations of the method 1600 may be implemented by reference to Figures 7 to 10 In some examples, the base station 105 may execute a code set to control the functional units of the device to perform the functions described below. Additionally or alternatively, the base station 105 may use dedicated hardware to perform aspects of the functions described below.

[0150] At block 1605, the base station 105 may transmit a first signal that is a synchronization signal associated with a burst of synchronization signals in multiple directions. The operations of block 1605 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1605 may be as described with reference to Figures 7 to 10 The transmitter described is implemented.

[0151] At block 1610, the base station 105 may, after transmitting the first signal and during the listening interval, listen for a second signal from the first UE affected by the first signal, the second signal indicating interference at the first UE. The operations of block 1610 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1610 may be as described with reference to Figures 7 to 10 The listening component described is executed.

[0152] At block 1615, the base station 105 may receive the second signal during the listening interval. The operations of block 1615 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1615 may be as described with reference to Figures 7 to 10 The listening component described is executed.

[0153] At block 1620, the base station 105 may receive a second signal in a symbol corresponding to one of the multiple directions of the synchronization signal burst. The operations of block 1620 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1620 may be as described with reference to Figures 7 to 10 The listening component described is executed.

[0154] At block 1625, the base station 105 may initiate an interference management process based on the reception of the second signal. The operations of block 1625 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1625 may be as described with reference to Figures 7 to 10 The described interference components are performed.

[0155] At block 1630, the base station 105 may perform an interference management procedure in fewer than all of the multiple directions of the synchronization signal burst, but in at least one of the multiple directions corresponding to the symbol in which the second signal is received. The operations of block 1630 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1630 may be performed as described with reference to Figures 7 to 10 The described interference components are performed.

[0156] In some cases, the first signal is a synchronization signal associated with a synchronization signal burst in multiple directions.

[0157] Figure 17 A flow chart illustrating a method 1700 for on-demand interference management according to aspects of the present disclosure is shown. As described herein, the operations of the method 1700 may be implemented by the base station 105 or a component thereof. For example, the operations of the method 1700 may be implemented by reference to Figures 7 to 10 In some examples, the base station 105 may execute a code set to control the functional units of the device to perform the functions described below. Additionally or alternatively, the base station 105 may use dedicated hardware to perform aspects of the functions described below.

[0158] At block 1705, the base station 105 may receive an interference management signal from a second UE served by the base station 105, the interference management signal indicating that the second UE is initiating an additional interference management procedure based on the second UE receiving an additional signal from the additional UE, the additional signal indicating interference at the additional UE. The operations of block 1705 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1705 may be as described with reference to Figures 7 to 10 The described interference components are performed.

[0159] At block 1710, the base station 105 may participate in additional interference management procedures for the second UE based on the received interference management signal. The operations of block 1710 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1710 may be as described with reference to Figures 7 to 10 The described interference components are performed.

[0160] At block 1715, the base station 105 may perform a listen before send (LBT) procedure in the direction of the second UE based on the direction of the received interference management signal. The operations of block 1715 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1715 may be as described with reference to Figures 7 to 10 The described interference components are performed.

[0161] Figure 18 1800 for interference management according to aspects of the present disclosure. As described herein, the operations of the method 1800 may be implemented by the UE 115 or its components. For example, the operations of the method 1800 may be implemented by the reference Figures 11 to 14 In some examples, the UE 115 may execute a code set to control the functional units of the device to perform the functions described below. Additionally or alternatively, the UE 115 may use dedicated hardware to perform aspects of the functions described below.

[0162] At block 1805, UE 115 may identify that a first signal from a base station is interfering with communications to or from a victim UE. The operations of block 1805 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1805 may be as described with reference to Figures 11 to 14 The described interference components are performed.

[0163] At block 1810, UE 115 may transmit a second signal to the base station during a listening interval in which the base station listens for the second signal, the second signal indicating interference at the victim UE. The operations of block 1810 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1810 may be as described with reference to Figures 11 to 14The listening component described is executed.

[0164] Figure 19 1900 for interference management according to aspects of the present disclosure. As described herein, the operations of the method 1900 may be implemented by the UE 115 or its components. For example, the operations of the method 1900 may be implemented by the reference Figures 11 to 14 In some examples, the UE 115 may execute a code set to control the functional units of the device to perform the functions described below. Additionally or alternatively, the UE 115 may use dedicated hardware to perform aspects of the functions described below.

[0165] At block 1905, UE 115 may monitor, during a listening interval, a first signal from a victim UE affected by communications to or from a first UE, the first signal indicating interference at the victim UE. The operations of block 1905 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1905 may be as described with reference to Figures 11 to 14 The listening component described is executed.

[0166] At block 1910, UE 115 may receive a first signal during a listening interval. The operations of block 1910 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1910 may be as described with reference to Figures 11 to 14 The listening component described is executed.

[0167] At block 1915, UE 115 may send an interference management signal to a base station serving the first UE, the interference management signal indicating that the first UE is initiating an interference management procedure based on the first UE receiving the first signal from the victim UE. The operations of block 1915 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1915 may be as described with reference to Figures 11 to 14 The described interference components are performed.

[0168] It should be noted that the above methods describe possible implementations, and that operations and steps may be rearranged or otherwise modified, and that other implementations are possible. Additionally, aspects of two or more of these methods may be combined.

[0169] The techniques described herein can be used in various wireless communication systems, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single-carrier frequency division multiple access (SC-FDMA), and other systems. The terms "network" and "system" are often used interchangeably. A code division multiple access (CDMA) system can implement radio technologies such as CDMA2000 and Universal Terrestrial Radio Access (UTRA). CDMA2000 encompasses the IS-2000, IS-95, and IS-856 standards. Versions of IS-2000 are often referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is often referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other CDMA variants. TDMA networks can implement radio technologies such as Global System for Mobile Communications (GSM).

[0170] OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash OFDM, and others. UTRA and E-UTRA are components of the Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, NR, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein can be used for the systems and radio technologies mentioned above, as well as other systems and radio technologies. Although aspects of LTE or NR systems may be described for example, and LTE or NR terminology may be used throughout much of the description, the techniques described herein are applicable beyond LTE or NR applications.

[0171] In LTE / LTE-A networks, including those described herein, the term evolved Node B (eNB) may be used generally to describe a base station. One or more of the wireless communication systems described herein may include heterogeneous LTE / LTE-A or NR networks, in which different types of eNBs provide coverage for various geographic areas. For example, each eNB, next-generation Node B (gNB), or base station may provide communication coverage for a macro cell, a small cell, or other types of cells. The term "cell" may be used to describe a base station, a carrier or component carrier associated with a base station, or the coverage area of ​​a carrier or base station (e.g., a sector, etc.), depending on the context.

[0172] A base station may include or may be referred to by those skilled in the art as a base transceiver station, a wireless base station, an access point, a wireless transceiver, a Node B, an evolved Node B (eNB), a gNB, a Home Node B, a Home eNode B, or some other suitable terminology. The geographic coverage area of ​​a base station may be divided into sectors, each of which constitutes only a portion of the coverage area. One or more wireless communication systems described herein may include different types of base stations (e.g., macro base stations or small cell base stations). The UEs described herein are capable of communicating with various types of base stations and network devices, including macro eNBs, small cell eNBs, gNBs, relay base stations, and the like. There may be overlapping geographic coverage areas for different technologies.

[0173] A macro cell typically covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs with a service subscription with the network provider. In contrast to a macro cell, a small cell is a low-power base station that may operate in the same or different frequency bands (e.g., licensed, unlicensed, etc.) as the macro cell. According to various examples, small cells may include pico cells, femto cells, and micro cells. For example, a pico cell may cover a smaller geographic area and may allow unrestricted access by UEs with a service subscription with the network provider. A femto cell may also cover a smaller geographic area (e.g., a home) and provide restricted access to UEs associated with the femto cell (e.g., UEs in a closed subscriber group, UEs for users at home, etc.). The eNB for a macro cell may be referred to as a macro eNB. The eNB for a small cell may be referred to as a small cell eNB, pico eNB, femto eNB, or home eNB. An eNB may support one or more (e.g., two, three, four, etc.) cells (e.g., component carriers).

[0174] One or more wireless communication systems described herein may support synchronous or asynchronous operation. For synchronous operation, base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time. For asynchronous operation, base stations may have different frame timing, and transmissions from different base stations may not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operation.

[0175] The downlink transmission described herein may also be referred to as forward link transmission, and the uplink transmission may also be referred to as reverse link transmission. Each communication link described herein (including, for example, Figure 1 and Figure 2 The wireless communication systems 100 and 200 of the present invention may include one or more carriers, where each carrier may be a signal composed of multiple subcarriers (eg, waveform signals with different frequencies).

[0176] The description set forth herein in conjunction with the accompanying drawings describes example configurations and does not represent all examples that can be implemented or are within the scope of the claims. The term "exemplary" as used herein means "serving as an example, instance, or illustration" and is not "preferred" or "advantageous over other examples." In order to provide an understanding of the described techniques, the detailed description includes specific details. However, these techniques can be implemented without using these specific details. In some cases, in order to avoid obscuring the concepts of the described examples, well-known structures and devices are shown in block diagram form.

[0177] In the accompanying drawings, similar components or features may have the same reference number. In addition, components of the same type may be distinguished by following the reference number with a dash and a second reference number to distinguish between similar components. If only the first reference number is used in this specification, the description applies to any of the similar components having the same first reference number, regardless of the second reference number.

[0178] The information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0179] The various illustrative blocks and modules described in conjunction with the disclosure herein may be implemented or executed using a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic devices, 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 embodiment, the processor may be any conventional processor, controller, microcontroller, or state machine. A 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, a combination of one or more microprocessors and a DSP core, or any other such configuration).

[0180] The functions described herein can be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored on or transmitted via a computer-readable medium as one or more instructions or code. Other examples and implementations are within the scope of this application and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features implementing the functions can also be physically located in various locations, including distributed so that the functions are implemented at different physical locations. Furthermore, the phrase "or," as used in a list of items in a claim (e.g., a list of items suffixed 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). Furthermore, as used herein, the phrase "based on" should not be construed as referring to a closed set of conditions. For example, without departing from the scope of the present disclosure, exemplary steps described as "based on condition A" may be based on both condition A and condition B. In other words, as used herein, the phrase "based on" is to be interpreted in the same manner as the phrase "based at least in part on."

[0181] Computer-readable media include both non-transitory computer storage media and communication media, including any media that facilitates the transfer of computer programs from one location to another. Non-transitory storage media can be any available medium that can be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media can include RAM, ROM, electrically erasable programmable read-only memory (EEPROM), compact disc (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a general-purpose or special-purpose computer or a general-purpose or special-purpose processor. In addition, any connection can be appropriately referred to as a computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of medium. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc, where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0182] The description herein is provided to enable those skilled in the art to implement or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the disclosure. Therefore, the disclosure is not limited to the examples and designs described herein, but is intended to be used in the widest sense consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a first user equipment (UE), comprising: During a listening interval, listening for a first signal from a victim UE, the victim UE being affected by communications to or from the first UE, the first signal indicating interference at the victim UE; receiving the first signal during the listening interval; as well as An interference management signal is sent to a base station serving the first UE, the interference management signal indicating that the first UE is initiating an interference management procedure in the direction of the base station based at least in part on the first UE receiving the first signal from the victim UE.

2. The method according to claim 1, further comprising: receiving a registration request (RRQ) from the base station; as well as Based at least in part on receiving the first signal, refraining from responding to the RRQ with uplink (UL) data or a registration response (RRS) signal.

3. The method according to claim 2, further comprising: Determining that a network allocation vector field is set is based at least in part on receiving the first signal, wherein avoiding responding to the RRQ is based at least in part on setting the network allocation vector field.

4. The method according to claim 1, wherein The interference management procedure is a listen before send (LBT) procedure in the direction of the base station.

5. The method according to claim 1, wherein The first signal is a registration response (RRS) signal.

6. An apparatus for wireless communication at a first user equipment (UE), comprising: processor, memory in electronic communication with the processor, and Instructions stored in the memory and executable by the processor to cause the apparatus to: During a listening interval, listening for a first signal from a victim UE, the victim UE being affected by communications to or from the first UE, the first signal indicating interference at the victim UE; receiving the first signal during the listening interval; as well as An interference management signal is sent to a base station serving the first UE, the interference management signal indicating that the first UE is initiating an interference management procedure in the direction of the base station based at least in part on the first UE receiving the first signal from the victim UE.

7. The device according to claim 6, wherein The instructions are also executable by the processor to cause the device to: receiving a registration request (RRQ) from the base station; and Based at least in part on receiving the first signal, refraining from responding to the RRQ with uplink (UL) data or a registration response (RRS) signal.

8. The device according to claim 7, wherein The instructions are also executable by the processor to cause the device to: Determining that a network allocation vector field is set is based at least in part on receiving the first signal, wherein avoiding responding to the RRQ is based at least in part on setting the network allocation vector field.

9. The device according to claim 6, wherein The interference management procedure is a listen before send (LBT) procedure in the direction of the base station.

10. The device according to claim 6, wherein The first signal is a registration response (RRS) signal.

11. An apparatus for wireless communication at a first user equipment (UE), comprising: means for listening, during a listening interval, for a first signal from a victim UE, the victim UE being affected by communications to or from the first UE, the first signal indicating interference at the victim UE; means for receiving the first signal during the listening interval; as well as Means for sending an interference management signal to a base station serving the first UE, the interference management signal indicating that the first UE is initiating an interference management procedure in the direction of the base station based at least in part on the first UE receiving the first signal from the victim UE.

12. The apparatus according to claim 11, further comprising: means for receiving a registration request (RRQ) from the base station; as well as Means for refraining from responding to the RRQ with uplink (UL) data or a registration response (RRS) signal based at least in part on receiving the first signal.

13. The apparatus according to claim 12, further comprising: Means for determining that a network allocation vector field is set based at least in part on receiving the first signal, wherein refraining from responding to the RRQ is based at least in part on setting the network allocation vector field.

14. The device according to claim 11, wherein The interference management procedure is a listen before send (LBT) procedure in the direction of the base station.

15. The device according to claim 11, wherein The first signal is a registration response (RRS) signal.

16. A non-transitory computer-readable medium storing code for wireless communication at a first user equipment (UE), the code comprising instructions executable by a processor to: During a listening interval, listening for a first signal from a victim UE, the victim UE being affected by communications to or from the first UE, the first signal indicating interference at the victim UE; receiving the first signal during the listening interval; as well as An interference management signal is sent to a base station serving the first UE, the interference management signal indicating that the first UE is initiating an interference management procedure in the direction of the base station based at least in part on the first UE receiving the first signal from the victim UE.

17. The non-transitory computer-readable medium of claim 16, wherein: The instructions are also executable by the processor to perform the following operations: receiving a registration request (RRQ) from the base station; and Based at least in part on receiving the first signal, refraining from responding to the RRQ with uplink (UL) data or a registration response (RRS) signal.

18. The non-transitory computer-readable medium of claim 17, wherein: The instructions are also executable by the processor to perform the following operations: Determining that a network allocation vector field is set is based at least in part on receiving the first signal, wherein avoiding responding to the RRQ is based at least in part on setting the network allocation vector field.

19. The non-transitory computer-readable medium of claim 16, wherein: The interference management procedure is a listen before send (LBT) procedure in the direction of the base station.

20. The non-transitory computer-readable medium of claim 16, wherein: The first signal is a registration response (RRS) signal.

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