WO2019136639A1

WO2019136639A1 - Reducing user equipment radio frequency front end desensing caused by interference from other user equipment hardware

Info

Publication number: WO2019136639A1
Application number: PCT/CN2018/072127
Authority: WO
Inventors: Miao Fu; Ankur Srivastava; Kishore Kumar YANNAKULA; Aimin SHANG; Guibing GU; Yongrui PENG; Wei He; Ling Hang; Krishna Murthy Sastry Bhamidipati
Original assignee: Qualcomm Incorporated
Priority date: 2018-01-10
Filing date: 2018-01-10
Publication date: 2019-07-18

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify one or more hardware working frequencies of the UE. The UE may identify one or more frequencies for wireless communications by the UE with one or more networks. The UE may determine that at least one hardware working frequency of the UE is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE. The UE may adjust the at least one hardware working frequency based at least in part on the determination.

Description

REDUCING USER EQUIPMENT RADIO FREQUENCY FRONT END DESENSING CAUSED BY INTERFERENCE FROM OTHER USER EQUIPMENT HARDWARE

TECHNICAL FIELD

The following relates generally to wireless communications, and more specifically to reducing user equipment (UE) radio frequency (RF) front end desensing caused by interference from other UE hardware.

BACKGROUND

Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) . Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA) , time division multiple access (TDMA) , frequency division multiple access (FDMA) , orthogonal frequency division multiple access (OFDMA) , or discrete Fourier transform-spread-OFDM (DFT-S-OFDM) . A wireless multiple-access communications system may include a number of base stations or network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE) .

UEs typically have a variety of hardware components that are used for performing wireless communications, user interface, sensing/monitoring, display functions, timing, and the like. Each hardware component uses one or more electrical signals for operating, e.g., direct and/or intermediate operational signals. Each of the one or more electrical signals have an associated frequency that may vary due to the type of hardware component, based on the particular function that the hardware component is performing, and the like. In some aspects, any direct and/or intermediate electrical signal associated with hardware component (s) of the UE may be considered a hardware working frequency of the UE.

In some aspects, a hardware working frequency may cause, contribute to, or potentially introduce interference with respect to a frequency that the UE is using (or could possibly use) to perform wireless communications. For example, the hardware working frequency and/or a harmonic of the hardware working frequency may be at a frequency that, even though the amplitude is rather small, may desensitize the RF front end components of the UE a sufficient amount that it interferes with a receive signal of the UE. For example, a UE located at the edge of the coverage area (an edge UE) of its serving base station may be particularly vulnerable to interference caused by one or more hardware working frequencies. Moreover, certain hardware components (such as a full-device display of the UE) may be difficult to shield against potential interference with UE RF transmissions. Improved methods of communication between the UE and base station are desired.

SUMMARY

The described techniques relate to improved methods, systems, devices, or apparatuses that support reducing user equipment (UE) radio frequency (RF) front end desensing caused by interference from other UE hardware. Generally, the described techniques provide for a hardware and/or software function operating on the UE that modifies hardware working frequencies when such frequencies, either the actual frequency and/or a harmonic of the frequency, cause or may cause interference with one or more frequencies that the UE uses or may use to perform wireless communications. For example, the UE may, on a per hardware component of the UE basis, determine or otherwise identify the frequencies (working frequency and/or harmonic) that hardware component (s) are using as working frequencies. The UE may also determine or otherwise identify frequencies that the UE is using and/or may use for wireless communications with one or more networks, e.g., a cellular network, a Wi-Fi network, a Bluetooth network, and the like. The UE may determine whether any hardware working frequencies are an interfering frequency (e.g., either may, if adopted, cause interference) with respect to any one of the frequencies that the UE uses (or may use) for wireless communications. If the hardware working frequency causes or may cause such interference, the UE may modify or otherwise adjust the hardware working frequency in order to mitigate and/or avoid such interference.

A method of wireless communication is described. The method may include identifying one or more hardware working frequencies of a UE, identifying one or more frequencies for wireless communications by the UE with one or more networks, determining that at least one hardware working frequency of the UE is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE, and adjusting the at least one hardware working frequency based at least in part on the determination.

An apparatus for wireless communication is described. The apparatus may include means for identifying one or more hardware working frequencies of a UE, means for identifying one or more frequencies for wireless communications by the UE with one or more networks, means for determining that at least one hardware working frequency of the UE is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE, and means for adjusting the at least one hardware working frequency based at least in part on the determination.

Another apparatus for wireless communication is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be operable to cause the processor to identify one or more hardware working frequencies of a UE, identify one or more frequencies for wireless communications by the UE with one or more networks, determine that at least one hardware working frequency of the UE is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE, and adjust the at least one hardware working frequency based at least in part on the determination.

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 one or more hardware working frequencies of a UE, identify one or more frequencies for wireless communications by the UE with one or more networks, determine that at least one hardware working frequency of the UE is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE, and adjust the at least one hardware working frequency based at least in part on the determination.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for identifying one or more hardware working frequencies of the UE includes identifying at least one working frequency of a hardware component of the UE. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for determining that the at least one hardware working frequency may be a cause or potential cause of an interfering frequency comprises determining that a harmonic frequency associated with the at least one working frequency of the hardware component of the UE may be a cause or potential cause of the interfering frequency.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for identifying one or more hardware working frequencies of the UE includes identifying at least one working frequency of a hardware component of the UE. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for determining further comprises identifying, for the hardware component of the UE, one or more harmonic frequencies associated with the at least one working frequency.

In some examples of the method, apparatus, and non-transitory computer-readable medium described above, identifying one or more frequencies for wireless communications comprises: identifying a first set of frequencies for wireless communication between the UE and a serving base station. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for identifying a second set of frequencies for wireless communication between the UE and one or more neighbor base stations.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for determining, for the at least one hardware working frequency, a first number of frequencies that cause or potentially cause an interfering frequency with respect to the first set of frequencies. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for determining, for the at least one hardware working frequency, a second number of frequencies that cause or potentially cause an interfering frequency with respect to the second set of frequencies. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for adjusting, for the hardware component, the at least one hardware working frequency to another hardware working frequency based at least in part on at least one of the first number of frequencies or the second number of frequencies.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for identifying, from the first number of frequencies, another hardware working frequency that causes or potentially causes the smallest number of interfering frequencies. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for selecting the other hardware working frequency based at least in part on the identifying.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for determining, from the first number of frequencies, that no other hardware working frequency may have a number of interfering frequencies that satisfy a threshold. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for identifying, from the second number of frequencies, another hardware working frequency that causes or potentially causes the smallest number of interfering frequencies. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for selecting the other hardware working frequency based at least in part on the identifying.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for determining, based at least in part on the first set of frequencies and the second set of frequencies, that the number of interfering frequencies for another hardware working frequency may be below a threshold. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for selecting the other hardware working frequency based at least in part on the determining.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for determining that the one or more frequencies for wireless communications by the UE with one or more networks may have been updated. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for determining whether any of the one or more hardware working frequencies of the UE may be a cause or potential cause of an interfering frequency with respect to the updated one or more frequencies for wireless communications by the UE with one or more networks.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for receiving a signal identifying the one or more frequencies for wireless communications by the UE with one or more networks.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for determining an operational state of the UE, wherein the one or more frequencies for wireless communications by the UE with one or more networks may be based at least in part on the operational state.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for determining that the operational state comprises a radio frequency modem being disabled. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for refraining from adjusting the at least one hardware working frequency based at least in part on the radio frequency modem being disabled.

Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for determining that the at least one hardware working frequency of the UE may be cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE may be performed at a modem of the UE or an application processing layer of the UE.

In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the one or more frequencies for wireless communications by the UE with one or more networks may be associated with at least one of a cellular radio access technology (RAT) , or a Wi-Fi RAT, or a Bluetooth RAT.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example of a system for wireless communication that supports reducing user equipment (UE) radio frequency (RF) front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure.

FIG. 2 illustrates an example of a block diagram of a UE that supports reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure.

FIG. 3 illustrates an example of a method that supports reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure.

FIG. 4 illustrates an example of a process that supports reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure.

FIGs. 5 through 7 show block diagrams of a device that supports reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure.

FIG. 8 illustrates a block diagram of a system including a UE that supports reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure.

FIGs. 9 through 11 illustrate methods for reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure.

DETAILED DESCRIPTION

Networks typically include one or more base stations and one or more user equipment (UE) performing wireless communications over one or more frequencies. For example, a UE may be camped or otherwise associated with a serving base station and perform uplink and/or downlink communications using one or more frequencies, e.g., carriers, channels, etc. Moreover, the UE may also identify and/or monitor operating frequencies for neighboring base stations. For example, the neighboring base stations may be candidate base stations that the UE may perform a handover to, may be members of a coordinated multi-point (CoMP) set of base stations providing service to the UE, and the like. The UE may typically discover the frequencies for wireless communications by the serving and/or neighboring base stations during a connection establishment procedure, based on receiving one or more broadcast/unicast signals, and the like.

A conventional UE includes various hardware components that provide a wide range of functionality for the UE. For example, the UE may include any number of clocks, counters, amplifiers, modems, and various other analog and/or digital components, that support functionality such as wireless communications, user interface, storage, display, etc. Each hardware component (e.g., a single piece of hardware and/or collection of components that perform a particular function) typically uses one or more electrical signals operating at a particular frequency. Any of the electrical signals, alone or in combination with each other, may generally be considered a hardware working frequency for the hardware component. However, the frequency of the electrical signals may cause or potentially cause interference with the wireless communications of the UE. For example, the working frequency and/or a harmonic of the working frequency may be within a range of one or more of the frequencies used for wireless communications. This may result in the internally generated signal (e.g., from the hardware working frequency) of the UE desensing the RF front end components of the UE, e.g., the interfering frequency may have a signal level that is more than (or within a range of) a downlink signal of the UE, thus interfering with the downlink signal reception. As one non-limiting example, this may be more problematic in the situation where the UE is an edge UE and therefore the downlink signal has a relatively low receive signal strength. In another example, the interfering hardware working frequency may be problematic when the component associated with the hardware working frequency is a full-device display or touchscreen; the full-device or edge-to-edge nature of the display may result in less effective shielding of the hardware working frequencies for the display, thus resulting in a greater likelihood of interference arising from the hardware working frequencies for the display.

Aspects of the disclosure are initially described in the context of a wireless communications system. Aspects of the present disclosure generally provide for a UE to be configured to identify frequencies of hardware components that may cause interference with wireless communication frequencies and, once identified, adjust the hardware working frequency. For example, the UE may identify, for some or all of the hardware components of the UE, the hardware working frequencies. This may include the actual working frequency of the hardware component and/or one or more harmonics of the working frequency. The UE may also identify the frequencies that the UE is and/or may use for wireless communications via the network, e.g., cellular network wireless frequencies, Bluetooth network wireless frequencies, etc. The UE may then determine if any of the hardware working frequencies are, or could be, an interfering frequency with respect to any of the wireless communication frequencies. When the UE determines that a hardware working frequency is, or could be, an interfering frequency, the UE may adjust the hardware working frequency, e.g., may change the hardware working frequency (raise or lower) and/or may select a different working frequency for the hardware component.

Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to reducing UE RF front end desensing caused by interference from other UE hardware.

FIG. 1 illustrates an example of a wireless communications system 100 in accordance with aspects of the present disclosure. The wireless communications system 100 includes base stations 105, UEs 115, and a core network 130. In some examples, the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some cases, wireless communications system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, or communications with low-cost and low-complexity devices.

Base stations 105 may wirelessly communicate with UEs 115 (e.g., using various RATs or wireless technologies) via one or more base station antennas. Each base station 105 may provide communication coverage for a respective geographic coverage area 110. Each base station 105 may provide communication coverage for a macro cell, a small cell, or other types of cell. The term “cell” is a 3rd Generation Partnership Project “3GPP” term that can be used to describe a base station, a carrier or component carrier associated with a base station, or a coverage area (e.g., sector, etc. ) of a carrier or base station, depending on context. Communication links 125 shown in wireless communications system 100 may include uplink (UL) transmissions from a UE 115 to a base station 105, or downlink (DL) transmissions, from a base station 105 to a UE 115. UEs 115 may be dispersed throughout the wireless communications system 100, and each UE 115 may be stationary or mobile. A UE 115 may also be referred to as a mobile station, a subscriber station, a remote unit, a wireless device, an access terminal (AT) , a handset, a user agent, a client, wireless communication UE apparatus, or like terminology. A UE 115 may also be a cellular phone, a wireless modem, a handheld device, a personal computer, a tablet, a personal electronic device, an machine type communication (MTC) device, etc. Base stations 105 described herein may include or may be referred to by those skilled in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation Node B or giga-nodeB (either of which may be referred to as a gNB) , a Home NodeB, a Home eNodeB, or some other suitable terminology. Wireless communications system 100 may include base stations 105 of different types (e.g., macro or small cell base stations) . The UEs 115 described herein may be able to communicate with various types of base stations 105 and network equipment including macro eNBs, small cell eNBs, gNBs, relay base stations, and the like.

Each base station 105 may be associated with a particular geographic coverage area 110 in which communications with various UEs 115 is supported. Each base station 105 may provide communication coverage for a respective geographic coverage area 110 via communication links 125, and communication links 125 between a base station 105 and a UE 115 may utilize one or more carriers. Communication links 125 shown in wireless communications system 100 may include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions from a base station 105 to a UE 115. Downlink transmissions may also be called forward link transmissions while uplink transmissions may also be called reverse link transmissions.

The geographic coverage area 110 for a base station 105 may be divided into sectors making up only a portion of the geographic coverage area 110, and each sector may be associated with a cell. For example, each base station 105 may provide communication coverage for a macro cell, a small cell, a hot spot, or other types of cells, or various combinations thereof. In some examples, a base station 105 may be movable and therefore provide communication coverage for a moving geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, and overlapping geographic coverage areas 110 associated with different technologies may be supported by the same base station 105 or by different base stations 105. The wireless communications system 100 may include, for example, a heterogeneous LTE/LTE-A/LTE-A Pro or NR network in which different types of base stations 105 provide coverage for various geographic coverage areas 110.

The term “cell” refers to a logical communication entity used for communication with a base station 105 (e.g., over a carrier) , and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) ) operating via the same or a different carrier. In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband Internet-of-Things (NB-IoT) , enhanced mobile broadband (eMBB) , or others) that may provide access for different types of devices. In some cases, the term “cell” may refer to a portion of a geographic coverage area 110 (e.g., a sector) over which the logical entity operates.

UEs 115 may be dispersed throughout the wireless communications system 100, and each UE 115 may be stationary or mobile. A UE 115 may also be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client. A UE 115 may also be a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer. In some examples, a UE 115 may also refer to a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or an MTC device, or the like, which may be implemented in various articles such as appliances, vehicles, meters, or the like.

Some UEs 115, such as MTC or IoT devices, may be low cost or low complexity devices, and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication) . M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a base station 105 without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay that information to a central server or application program that can make use of the information or present the information to humans interacting with the program or application. Some UEs 115 may be designed to collect information or enable automated behavior of machines. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.

Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously) . In some examples half-duplex communications may be performed at a reduced peak rate. Other power conservation techniques for UEs 115 include entering a power saving “deep sleep” mode when not engaging in active communications, or operating over a limited bandwidth (e.g., according to narrowband communications) . In some cases, UEs 115 may be designed to support critical functions (e.g., mission critical functions) , and a wireless communications system 100 may be configured to provide ultra-reliable communications for these functions.

In some cases, a UE 115 may also be able to communicate directly with other UEs 115 (e.g., using a peer-to-peer (P2P) or device-to-device (D2D) protocol) . One or more of a group of UEs 115 utilizing D2D communications may be within the geographic coverage area 110 of a base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of a base station 105, or be otherwise unable to receive transmissions from a base station 105. In some cases, groups of UEs 115 communicating via D2D communications may utilize a one-to-many (1: M) system in which each UE 115 transmits to every other UE 115 in the group. In some cases, a base station 105 facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between UEs 115 without the involvement of a base station 105.

Base stations 105 may communicate with the core network 130 and with one another. For example, base stations 105 may interface with the core network 130 through backhaul links 132 (e.g., S1, etc. ) . Base stations 105 may communicate with one another over backhaul links 134 (e.g., X2, etc. ) either directly or indirectly (e.g., through core network 130) . Base stations 105 may perform radio configuration and scheduling for communication with UEs 115, or may operate under the control of a base station controller (not shown) . In some examples, base stations 105 may be macro cells, small cells, hot spots, or the like. A base station 105 may also be referred to as an access point ( “AP” ) , a Node B, Radio Network Controller ( “RNC” ) , evolved Node B (eNB) , Base Station Controller ( “BSC” ) , Base Transceiver Station ( “BTS” ) , Base Station ( “BS” ) , Transceiver Function ( “TF” ) , Radio Router, Radio Transceiver, Basic Service Set ( “BSS” ) , Extended Service Set ( “ESS” ) , Radio Base Station ( “RBS” ) , or some other terminology.

The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) , 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 manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the EPC. User IP packets may be transferred through the S-GW, which itself may be connected to the P-GW. The P-GW may provide IP address allocation as well as other functions. The P-GW may be connected to the network operators IP services. The operators IP services may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched (PS) Streaming Service.

At least some of the network devices, such as a base station 105, may include subcomponents such as an access network entity, which may be an example of an access node controller (ANC) . Each access network entity may communicate with UEs 115 through a number of other access network transmission entities, which may be referred to as a radio head, a smart radio head, or a transmission/reception point (TRP) . In some configurations, various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or consolidated into a single network device (e.g., a base station 105) .

Wireless communications system 100 may operate using one or more frequency bands, typically in the range of 300 MHz to 300 GHz. Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band, since the wavelengths range from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features. However, the waves may penetrate structures sufficiently for a macro cell to provide service to UEs 115 located indoors. Transmission of UHF waves may be associated with smaller antennas and shorter range (e.g., less than 100 km) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.

Wireless communications system 100 may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band. The SHF region includes bands such as the 5 GHz industrial, scientific, and medical (ISM) bands, which may be used opportunistically by devices that can tolerate interference from other users.

Wireless communications system 100 may also operate in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) , also known as the millimeter band. In some examples, wireless communications system 100 may support millimeter wave (mmW) communications between UEs 115 and base stations 105, and EHF antennas of the respective devices may be even smaller and more closely spaced than UHF antennas. In some cases, this may facilitate use of antenna arrays within a UE 115. However, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. Techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.

In some cases, wireless communications system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz ISM band. When operating in unlicensed radio frequency spectrum bands, wireless devices such as base stations 105 and UEs 115 may employ listen-before-talk (LBT) procedures to ensure a frequency channel is clear before transmitting data. In some cases, operations in unlicensed bands may be based on a CA configuration in conjunction with CCs operating in a licensed band (e.g., LAA) . Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these. Duplexing in unlicensed spectrum may be based on frequency division duplexing (FDD) , time division duplexing (TDD) , or a combination of both.

In some examples, base station 105 or UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. For example, wireless communications system 100 may use a transmission scheme between a transmitting device (e.g., a base station 105) and a receiving device (e.g., a UE 115) , where the transmitting device is equipped with multiple antennas and the receiving devices are equipped with one or more antennas. MIMO communications may employ multipath signal propagation to increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream, and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams. Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO) where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) where multiple spatial layers are transmitted to multiple devices.

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

In one example, a base station 105 may use multiple antennas or antenna arrays to conduct beamforming operations for directional communications with a UE 115. For instance, some signals (e.g. synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a base station 105 multiple times in different directions, which may include a signal being transmitted according to different beamforming weight sets associated with different directions of transmission. Transmissions in different beam directions may be used to identify (e.g., by the base station 105 or a receiving device, such as a UE 115) a beam direction for subsequent transmission and/or reception by the base station 105. Some signals, such as data signals associated with a particular receiving device, may be transmitted by a base station 105 in a single beam direction (e.g., a direction associated with the receiving device, such as a UE 115) . In some examples, the beam direction associated with transmissions along a single beam direction may be determined based at least in in part on a signal that was transmitted in different beam directions. For example, a UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions, and the UE 115 may report to the base station 105 an indication of the signal it received with a highest signal quality, or an otherwise acceptable signal quality. Although these techniques are described with reference to signals transmitted in one or more directions by a base station 105, a UE 115 may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE 115) , or transmitting a signal in a single direction (e.g., for transmitting data to a receiving device) .

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

In some cases, the antennas of a base station 105 or UE 115 may be located within one or more antenna arrays, which may support MIMO operations, or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co- located at an antenna assembly, such as an antenna tower. In some cases, antennas or antenna arrays associated with a base station 105 may be located in diverse geographic locations. A base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with a UE 115. Likewise, a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.

In some cases, wireless communications system 100 may be a packet-based network that operate 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. A Radio Link Control (RLC) layer may in some cases perform packet segmentation and reassembly to communicate over logical channels. A Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer may also use hybrid automatic repeat request (HARQ) to provide retransmission at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or core network 130 supporting radio bearers for user plane data. At the Physical (PHY) layer, transport channels may be mapped to physical channels.

In some cases, UEs 115 and base stations 105 may support retransmissions of data to increase the likelihood that data is received successfully. HARQ feedback is one technique of increasing the likelihood that data is received correctly over a communication link 125. HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC) ) , forward error correction (FEC) , and retransmission (e.g., automatic repeat request (ARQ) ) . HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., signal-to-noise conditions) . In some cases, a wireless device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.

Time intervals in LTE or NR may be expressed in multiples of a basic time unit, which may, for example, refer to a sampling period of T _s = 1/30,720,000 seconds. Time intervals of a communications resource may be organized according to radio frames each having a duration of 10 milliseconds (ms) , where the frame period may be expressed as T _f = 307, 200 T _s. The radio frames may be identified by a system frame number (SFN) ranging from 0 to 1023. Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms. A subframe may be further divided into 2 slots each having a duration of 0.5 ms, and each slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) . Excluding the cyclic prefix, each symbol period may contain 2048 sampling periods. In some cases a subframe may be the smallest scheduling unit of the wireless communications system 100, and may be referred to as a transmission time interval (TTI) . In other cases, a smallest scheduling unit of the wireless communications system 100 may be shorter than a subframe or may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) or in selected component carriers using sTTIs) .

In some wireless communications systems, a slot may further be divided into multiple mini-slots containing one or more symbols. In some instances, a symbol of a mini-slot or a mini-slot may be the smallest unit of scheduling. Each symbol may vary in duration depending on the subcarrier spacing or frequency band of operation, for example. Further, some wireless communications systems may implement slot aggregation in which multiple slots or mini-slots are aggregated together and used for communication between a UE 115 and a base station 105.

The term “carrier” refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communications over a communication link 125. For example, a carrier of a communication link 125 may include a portion of a radio frequency spectrum band that is operated according to physical layer channels for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. A carrier may be associated with a pre-defined frequency channel (e.g., an E-UTRA absolute radio frequency channel number (EARFCN) ) , and may be positioned according to a channel raster for discovery by UEs 115. Carriers may be downlink or uplink (e.g., in an FDD mode) , or be configured to carry downlink and uplink communications (e.g., in a TDD mode) . In some examples, signal waveforms transmitted over a carrier may be made up of multiple sub-carriers (e.g., using multi-carrier modulation (MCM) techniques such as OFDM or DFT-s-OFDM) .

The organizational structure of the carriers may be different for different radio access technologies (e.g., LTE, LTE-A, LTE-A Pro, NR, etc. ) . For example, communications over a carrier may be organized according to TTIs or slots, each of which may include user data as well as control information or signaling to support decoding the user data. A carrier may also include dedicated acquisition signaling (e.g., synchronization signals or system information, etc. ) and control signaling that coordinates operation for the carrier. In some examples (e.g., in a carrier aggregation configuration) , a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.

Physical channels may be multiplexed on a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. In some examples, control information transmitted in a physical control channel may be distributed between different control regions in a cascaded manner (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces) .

A carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100. For example, the carrier bandwidth may be one of a number of predetermined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz) . In some examples, each served UE 115 may be configured for operating over portions or all of the carrier bandwidth. In other examples, some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a predefined portion or range (e.g., set of subcarriers or RBs) within a carrier (e.g., “in-band” deployment of a narrowband protocol type) .

In a system employing MCM techniques, a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme) . Thus, the more resource elements that a UE 115 receives and the higher the order of the modulation scheme, the higher the data rate may be for the UE 115. In MIMO systems, a wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers) , and the use of multiple spatial layers may further increase the data rate for communications with a UE 115.

Devices of the wireless communications system 100 (e.g., base stations 105 or UEs 115) may have a hardware configuration that supports communications over a particular carrier bandwidth, or may be configurable to support communications over one of a set of carrier bandwidths. In some examples, the wireless communications system 100 may include base stations 105 and/or UEs that can support simultaneous communications via carriers associated with more than one different carrier bandwidth.

Wireless communications system 100 may support communication with a UE 115 on multiple cells or carriers, a feature which may be referred to as carrier aggregation (CA) or multi-carrier operation. A UE 115 may be configured with multiple downlink CCs and one or more uplink CCs according to a carrier aggregation configuration. Carrier aggregation may be used with both FDD and TDD component carriers.

In some cases, wireless communications system 100 may utilize enhanced component carriers (eCCs) . An eCC may be characterized by one or more features including wider carrier or frequency channel bandwidth, shorter symbol duration, shorter TTI duration, or modified control channel configuration. In some cases, an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have a suboptimal or non-ideal backhaul link) . An eCC may also be configured for use in unlicensed spectrum or shared spectrum (e.g., where more than one operator is allowed to use the spectrum) . An eCC characterized by wide carrier bandwidth may include one or more segments that may be utilized by UEs 115 that are not capable of monitoring the whole carrier bandwidth or are otherwise configured to use a limited carrier bandwidth (e.g., to conserve power) .

In some cases, an eCC may utilize a different symbol duration than other CCs, which may include use of a reduced symbol duration as compared with symbol durations of the other CCs. A shorter symbol duration may be associated with increased spacing between adjacent subcarriers. A device, such as a UE 115 or base station 105, utilizing eCCs may transmit wideband signals (e.g., according to frequency channel or carrier bandwidths of 20, 40, 60, 80 MHz, etc. ) at reduced symbol durations (e.g., 16.67 microseconds) . A TTI in eCC may consist of one or multiple symbol periods. In some cases, the TTI duration (that is, the number of symbol periods in a TTI) may be variable.

Wireless communications systems such as an NR system may utilize any combination of licensed, shared, and unlicensed spectrum bands, among others. The flexibility of eCC symbol duration and subcarrier spacing may allow for the use of eCC across multiple spectrums. In some examples, NR shared spectrum may increase spectrum utilization and spectral efficiency, specifically through dynamic vertical (e.g., across frequency) and horizontal (e.g., across time) sharing of resources.

One or more UE 115 may identify one or more hardware working frequencies of the UE 115. The UE 115 may identify one or more frequencies for wireless communications by the UE 115 with one or more networks. The UE 115 may determine that at least one hardware working frequency of the UE 115 is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE 115. The UE 115 may adjust the at least one hardware working frequency based at least in part on the determination.

FIG. 2 illustrates an example of a block diagram 200 that supports reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure. In some examples, block diagram 200 may implement aspects of wireless communication system 100. Block diagram 200 may include a UE 205, which may be an example of the corresponding device described herein.

The UE 205 may include any number of hardware components 210 (with three hardware components 210-a, 210-b, and 210-c being shown by way of example and for illustration purposes only) . Generally, hardware components 210 may be any component or a group of components of the UE 205. The hardware components 210 may be associated with one or more functions, may be located together or separately on the UE 205, and the like. The hardware components 210 may include one or more analog and/or digital components and/or functions. In some aspects, each hardware component 210 may have one or more associated hardware working frequencies. The hardware working frequencies may generally include the working frequency of any electrical signal (analog or digital) that is used by or otherwise associated with the hardware component 210. Some hardware components 210 may share one or more electrical signals, such that a hardware working frequency may be associated with more than one hardware component 210.

UE 205 may also include a frequency arbitrator 215 and one or more RF modem (s) 220. Generally, the RF modem 220 may be any modem function that may be used for performing wireless communications on a network. For example, the UE may have one or more RF modems 220 used for performing wireless communications on a cellular radio access technology (RAT) network, on a Wi-Fi RAT network, on a Bluetooth RAT network, or any other wireless RAT network. In some aspects, each RAT network may have a separate RF modem 220. In other aspects, some or all of the RAT networks that UE 205 is capable of communicating on may share an RF modem 220.

Frequency arbitrator 215 may generally monitor, control, or otherwise manage one or more aspects of interference management between the hardware working frequencies of hardware components 210 and the frequencies that the UE 205 uses (or could use) for performing wireless communications, e.g., using RF modem 220. Although illustrated separately, it is to be understood that frequency arbitrator 215 may be implemented in hardware and/or software functionality that is a separate component of UE 205 and/or is integrated into another component of UE 205. For example, the frequency arbitrator 215 may be a component of the RF modem 220, a component of an application processing layer of UE 205, a central or core processor of UE 205, and the like. Generally, frequency arbitrator 215 may communicate with one or more of the hardware components 210 and RF modem 220, e.g., via a bus.

Frequency arbitrator 215 may identify one or more hardware working frequencies of the UE 205, e.g., one or more working frequencies and/or harmonic frequencies associated with the working frequencies of hardware components 210. Frequency arbitrator 215 may also identify one or more frequencies for wireless communications by the UE 205 with one or more networks, e.g., a first set of one or more frequencies associated with a serving base station and a second set of one or more frequencies associated with neighbor base station (s) . In some instances, frequency arbitrator 215 receives the information about the one or more frequencies for wireless communications from the RF modem 220. Frequency arbitrator 215 may determine that at least one hardware working frequency of the UE 205 is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE 205. Generally, a hardware working frequency (or associated harmonic) may be considered to interfere with (e.g., be an interfering frequency) a frequency used for wireless communications based on the hardware working frequency being within a threshold level of the wireless communication frequency, based on an estimated signal level resulting from (directly and/or by emanations) of the hardware working frequency, based on the hardware working frequency being a within a threshold of a harmonic of the wireless communication frequency, and the like. Frequency arbitrator 215 may adjust the at least one hardware working frequency based at least in part on the determination. Generally, frequency arbitrator 215 may adjust, for the hardware component 210, the at least one hardware working frequency to another hardware working frequency based at least in part on at least one of the first set of frequencies or the second set of frequencies. Adjusting and/or updating the hardware working frequency may include raising, lowering, and/or selecting a different hardware working frequency for the hardware component 210.

In some aspects, frequency arbitrator 215 may adjust the hardware working frequency based on a priority system. For example, frequency arbitrator 215 may give priority to adjusting a hardware working frequency that interferes with one or more frequencies in the first set of frequencies (for communications with the serving base station) over interference with one or more frequencies in the second set of frequencies (for communication with neighbor base stations) . When adjusting the hardware working frequency and within either set of frequencies, frequency arbitrator 215 may identify the hardware working frequency having the smallest number of interfering frequencies (e.g., the hardware working frequency that causes or potentially causes the least amount of interference) and select that hardware working frequency to use for the hardware component 210. Whenever there are changes or updates to the frequencies that UE 205 uses for wireless communications, frequency arbitrator 215 may determine whether any of the hardware working frequencies cause or may cause interference to any of the updated frequencies.

In some aspects, frequency arbitrator 215 may adjust the hardware working frequency based on an operational state of the UE 205. For example, changes from operating on a first RAT network (e.g., LTE/LTE-A) to operating on a second RAT network (e.g., Wi-Fi) may constitute a change in operational states for UE 205. Frequency arbitrator 215 may therefore identify any interfering (or potentially interfering) frequencies from the hardware working frequencies and adjust the hardware working frequency accordingly. Another example change in operational states may include the UE 205 being placed in a different operational mode (e.g., airplane mode, Wi-Fi modem being enabled/disabled, cellular modem being enabled/disabled, etc. ) . For example, frequency arbitrator 215 may refrain from monitoring for interfering or potentially interfering frequencies when the UE 205 enters such a mode where the RF modem is disabled.

Thus, in some aspects frequency arbitrator 215 may adjust the working frequency of a display or other hardware component 210, so the potential harmonic interference may be changed accordingly, e.g., reduced, eliminated, avoided, etc. In aspects, the display or other hardware component 210 may be a full-device-or edge-to-edge-display that may result in less effective shielding of the hardware working frequencies for the display and/or proximity to one or more RF front end components causing interference with UE RF communications. In some aspects, the frequency arbitrator 215 may be implemented in a software module, e.g., deployed in an RF modem 220 or application processor layer. Frequency arbitrator 215 may have the overall picture of hardware working frequencies, and associated harmonic frequencies. In some aspects, the application processing layer may provide an indication of or otherwise register the potential hardware working frequencies to the frequency arbitrator 215 and the frequency arbitrator 215 may calculate or otherwise determine the associated harmonic frequencies.

In some aspects, the RF modem 220 may know which frequencies are or shall be used in a certain operational state and when communicating with a serving base station. The RF modem 220 may then provide an indication of or otherwise forecast the potential wireless communication frequency list to the frequency arbitrator 215. The RF modem 220 may update the wireless communication frequency list in real time and once the UE 205 moves to an new operational state, when the serving base station changes, and the like. The wireless communication frequency list may include the serving base station's frequencies and/or the relevant neighbor base station's frequencies. In some aspects, the RF modem 220 may provide an indication of whether the frequency is being used by the serving base station or the neighbor base station. When the RF modem 220 is disabled, it may provide an indication of or otherwise inform the frequency arbitrator 215 in order to invalidate the relevant wireless communication frequency list.

Once the frequency arbitrator 215 identifies or otherwise determines the wireless communication frequency list, it starts an interference avoidance/alleviation algorithm to find the more suitable hardware working frequency. This algorithm may include counting how many frequencies of the serving base station overlap with the harmonic frequencies of a certain hardware working frequency. The algorithm may include counting how many frequencies of neighbor base station (s) overlap with the harmonic frequencies of a certain hardware working frequency. The algorithm may check which hardware working frequency overlaps with more frequencies of the serving base station and then choose the one with the lowest overlapping count as the new working hardware frequency. In the instance where the overlapping count of all of hardware working frequencies is the same, the algorithm may keep checking the overlapping count of neighbor base station (s) of each hardware working frequency. The algorithm may then choose the hardware working frequency with the lowest overlapping count as the working hardware frequency. In the instance where there are multiple hardware working frequencies with the least overlapping count the algorithm may choose any one as the available working hardware frequencies. After completing the algorithm, the frequency arbitrator 215 may send a signal indicating or otherwise informing the application processing layer to adjust the hardware working frequency accordingly.

In some examples, UE 205 may be considered an edge UE when located at or near the edge of a coverage area of a base station. The network may broadcast the information, such that the RF modem 220 may provide an indication of the wireless communication frequency list to the frequency arbitrator 215 during cell (re) selection, during a circuit switch (CS) call, during a packet switch (PS) call, during a handover procedure, and the like. Frequency arbitrator 215 may check the frequencies used for wireless communication and then request the application processing layer to adjust the hardware working frequency, e.g., to reconfigure a display accordingly to avoid/alleviate interference or potential interference. The RF modem 220 may obtain the frequencies used for wireless communication based on a broadcast channel (BCCH) absolute radio frequency channel number (ARFCN) broadcast from the serving base station with relevant band information, based on a neighbor base station ARFCN with relevant band information broadcasted or unicasted by the serving base station, when UE 205 is in dedicated/transfer mode, the hopping frequency list or the single ARFCN with relevant band information assigned by the serving base station, and the like.

FIG. 3 illustrates an example of a method 300 that supports reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure. In some examples, method 300 may implement aspects of wireless communication system 100 and/or block diagram 200. Aspects of method 300 may be implemented by a UE, which may be an example of the corresponding device described herein. In some examples, a frequency arbitrator may implement aspects of method 300.

At 305, the UE may identify hardware working frequency i. Generally, hardware working frequency i may refer to the working frequency of any electrical signal that is associated with a hardware component (e.g., an oscillator) , function, or any group of components/functions, of the UE. The hardware working frequency may be a working frequency of a hardware component.

At 310, the UE may identify wireless communication frequencies for serving and/or neighbor base stations. The wireless frequencies may include a frequency list provided by an RF modem and include one or more frequencies that are being used, or may potentially be used, for performing wireless communications over one or more networks, e.g., cellular, Wi-Fi, and the like. This may include identifying a first set of one or more frequencies for wireless communication between the UE and a serving base station and identifying a second set of one or more frequencies for wireless communication between the UE and one or more neighbor base stations.

At 315, the UE may identify harmonic frequencies for hardware working frequency i. This may include the UE calculating or otherwise determining which harmonic frequencies are within a defined range of any frequency that is or may be used for performing wireless communications. In some aspects, the UE may include a filter that only determines harmonic frequencies that fall within a range of one or more radio frequency spectrum bands that the UE is configured to perform wireless communications on.

At 320, the UE may determine whether one or more of the hardware working frequencies (and/or associated harmonic frequencies) is a cause or potential cause of an interfering frequency with response to the one or more wireless communication frequencies that are being used, or are available for use, for wireless communications by the UE. This may include the UE determining whether any of the hardware working frequencies (and/or harmonics) have a frequency that is too close to (e.g., within a defined range) of a wireless frequency, that has a signal level (e.g., either direct or potential emanations from the hardware component) that is too high (e.g., above a defined threshold) , and the like. Any hardware working frequency that causes or may cause interference to a frequency used for wireless communications may be considered an interfering frequency.

If the UE determines that hardware working frequency i is an interfering frequency, at 325 the UE may adjust the hardware working frequency i. This may include adjusting the hardware working frequency i up, down, and/or selecting a different hardware working frequency.

If the UE determines that hardware working frequency i is not an interfering frequency at 320 and/or after adjusting the hardware working frequency i at 325, at 330 the UE may increment i and return to 305 to repeat the method 300 for the next hardware working frequency. The UE may continue this process until all hardware working frequencies are considered, according to a periodic schedule, based on a change in an operational state of the UE, as-needed (e.g., once interference is detected) , and the like.

FIG. 4 illustrates an example of a process 400 that supports reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure. In some examples, process 400 may implement aspects of wireless communication system 100, block diagram 200, and/or method 300. Process 400 may include a base station 405 and a UE 410, which may be examples of the corresponding devices described herein.

At 415, base station 405 may optionally transmit an indication of frequencies that may be used for wireless communications between base station 405 and UE 410. In some aspects, the indication may be transmitted in a broadcast signal and/or in a unicast signal. In one example, the indication may be transmitted in a ARFCN listing from the serving base station and/or one or more neighbor base stations.

Additionally or alternatively at 420, UE 410 may identify one or more hardware working frequencies of the UE. In some aspects, this may include identify at least working frequency of a hardware component of the UE 410. In some aspects, this may include UE 410 identify some or all of the harmonic frequencies associated with the hardware working frequency.

Additionally or alternatively at 425, UE 410 may identify one or more frequencies for wireless communications by the UE 410 with one or more networks. In some aspects, this may be based on the signal received at 415. In some aspects, this may include identifying a first set of one or more frequencies for wireless communication between the UE 410 and a serving base station and/or identifying a second set of one or more frequencies for wireless communication between the UE 410 and one or more neighbor base stations.

Additionally or alternatively at 430, UE 410 may determine that at least one hardware working frequency of the UE 410 is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communication by the UE 410. In some aspects, this may include determining that a harmonic frequency associated with the at least one working frequency of the hardware component of the UE is a cause or potential cause of the interfering frequency. In some aspects, this may include identifying, for the hardware component of the UE, one or more harmonic frequencies associated with the at least one working frequency.

Additionally or alternatively at 435, UE 410 may adjust the at least one hardware working frequency based at least in part on the determination made at 430.

In some aspects, this may include determining, for the at least one hardware working frequency, a first number of frequencies that cause or potentially cause an interfering frequency with respect to the first set of one or more frequencies and/or determining, for the at least one hardware working frequency, a second number of one or more frequencies that cause or potentially cause an interfering frequency with respect to the second set of frequencies. The UE 410 may adjust, for the hardware component, the at least one hardware working frequency to another hardware working frequency based at least in part on at least one of the first number of frequencies or the second number of frequencies.

In some aspects, this may include identifying, from the first number of frequencies, another hardware working frequency that causes or potentially causes a smaller number (e.g., the smallest number) of interfering frequencies and selecting the other hardware working frequency based at least in part on the identifying.

In some aspects, this may include determining, from the first number of frequencies, that no other hardware working frequency has a number of interfering frequencies that satisfy a threshold and identifying, from the second number of frequencies, another hardware working frequency that causes or potentially causes the smallest number of interfering frequencies. The UE 410 may select the other hardware working frequency based at least in part on the identifying.

In some aspects, this may include determining, based at least in part on the first set of one or more frequencies and/or the second set of one or more frequencies, that the number of interfering frequencies for another hardware working frequency is below a threshold. The UE 410 may select the other hardware working frequency based at least in part on the determining.

In some aspects, this may include determining that the one or more frequencies for wireless communications by the UE 410 with one or more networks have been updated and determining whether any of the one or more hardware working frequencies of the UE 410 is a cause or potential cause of an interfering frequency with respect to the updated one or more frequencies for wireless communications by the UE with one or more networks.

In some aspects, this may include determining an operational state of the UE 410, wherein the one or more frequencies for wireless communications by the UE 410 with one or more networks is based at least in part on the operational state. As one non-limiting example, this may include determining that the operational state comprises a RF modem being disabled and the UE 410 refraining from adjusting the at least one hardware working frequency based at least in part on the RF modem being disabled.

FIG. 5 shows a block diagram 500 of a wireless device 505 that supports reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure. Wireless device 505 may be an example of aspects of a UE 115 as described herein. Wireless device 505 may include receiver 510, frequency arbitrator 515, and transmitter 520. Wireless device 505 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .

Receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to reducing UE RF front end desensing caused by interference from other UE hardware (e.g., to one or more components of the UE RF front end) , etc. ) . Information may be passed on to other components of the device. The receiver 510 may be an example of aspects of the transceiver 835 described with reference to FIG. 8. The receiver 510 may utilize a single antenna or a set of antennas.

Frequency arbitrator 515 may be an example of aspects of the frequency arbitrator 815 described with reference to FIG. 8.

Frequency arbitrator 515 and/or at least some of its various sub-components may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions of the frequency arbitrator 515 and/or at least some of its various sub-components may be executed by a general-purpose processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , an field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure. The frequency arbitrator 515 and/or at least some of its various sub-components may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical devices. In some examples, frequency arbitrator 515 and/or at least some of its various sub-components may be a separate and distinct component in accordance with aspects of the present disclosure. In other examples, frequency arbitrator 515 and/or at least some of its various sub-components may be combined with one or more other hardware components, including but not limited to an I/O component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with aspects of the present disclosure.

Frequency arbitrator 515 may identify one or more hardware working frequencies of a UE, identify one or more frequencies for wireless communications by the UE with one or more networks, determine that at least one hardware working frequency of the UE is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE, and adjust the at least one hardware working frequency based on the determination.

Transmitter 520 may transmit signals generated by other components of the device. In some examples, the transmitter 520 may be collocated with a receiver 510 in a transceiver module. For example, the transmitter 520 may be an example of aspects of the transceiver 835 described with reference to FIG. 8. The transmitter 520 may utilize a single antenna or a set of antennas.

FIG. 6 shows a block diagram 600 of a wireless device 605 that supports reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure. Wireless device 605 may be an example of aspects of a wireless device 505 or a UE 115 as described with reference to FIG. 5. Wireless device 605 may include receiver 610, frequency arbitrator 615, and transmitter 620. Wireless device 605 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .

Receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to reducing UE RF front end desensing caused by interference from other UE hardware, etc. ) . Information may be passed on to other components of the device. The receiver 610 may be an example of aspects of the transceiver 835 described with reference to FIG. 8. The receiver 610 may utilize a single antenna or a set of antennas.

Frequency arbitrator 615 may be an example of aspects of the frequency arbitrator 815 described with reference to FIG. 8.

Frequency arbitrator 615 may also include hardware working frequency manager 625, wireless communication frequency manager 630, and interference manager 635.

Hardware working frequency manager 625 may identify one or more hardware working frequencies of a UE and adjust the at least one hardware working frequency based on the determination.

Wireless communication frequency manager 630 may identify one or more frequencies for wireless communications by the UE with one or more networks. In some cases, the one or more frequencies for wireless communications by the UE with one or more networks are associated with at least one of a cellular RAT, or a Wi-Fi RAT, or a Bluetooth RAT.

Interference manager 635 may determine that at least one hardware working frequency of the UE is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE and/or determine that the at least one hardware working frequency of the UE is cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE is performed at a modem of the UE or an application processing layer of the UE.

Transmitter 620 may transmit signals generated by other components of the device. In some examples, the transmitter 620 may be collocated with a receiver 610 in a transceiver module. For example, the transmitter 620 may be an example of aspects of the transceiver 835 described with reference to FIG. 8. The transmitter 620 may utilize a single antenna or a set of antennas.

FIG. 7 shows a block diagram 700 of a frequency arbitrator 715 that supports reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure. The frequency arbitrator 715 may be an example of aspects of a frequency arbitrator 515, a frequency arbitrator 615, or a frequency arbitrator 815 described with reference to FIGs. 5, 6, and 8. The frequency arbitrator 715 may include hardware working frequency manager 720, wireless communication frequency manager 725, interference manager 730, harmonic frequency manager 735, interference count manager 740, wireless frequency update manager 745, and operational state manager 750. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .

Hardware working frequency manager 720 may identify one or more hardware working frequencies of a UE and adjust the at least one hardware working frequency based on the determination.

Wireless communication frequency manager 725 may identify one or more frequencies for wireless communications by the UE with one or more networks. In some cases, the one or more frequencies for wireless communications by the UE with one or more networks are associated with at least one of a cellular RAT, or a Wi-Fi RAT, or a Bluetooth RAT.

Interference manager 730 may determine that at least one hardware working frequency of the UE is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE and determine that the at least one hardware working frequency of the UE is cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE is performed at a modem of the UE or an application processing layer of the UE.

Harmonic frequency manager 735 may identify one or more hardware working frequencies of the UE includes identifying at least one working frequency of a hardware component of the UE and determine that the at least one hardware working frequency is a cause or potential cause of an interfering frequency includes determining that a harmonic frequency associated with the at least one working frequency of the hardware component of the UE is a cause or potential cause of the interfering frequency.

Interference count manager 740 may identify one or more hardware working frequencies of the UE includes identifying at least one working frequency of a hardware component of the UE, select the other hardware working frequency based on the determining, identify a second set of frequencies for wireless communication between the UE and one or more neighbor base stations, determine, for the at least one hardware working frequency, a first number of frequencies that cause or potentially cause an interfering frequency with respect to the first set of one or more frequencies and/or determine, for the at least one hardware working frequency, a second number of frequencies that cause or potentially cause an interfering frequency with respect to the second set of one or more frequencies, adjust, for the hardware component, the at least one hardware working frequency to another hardware working frequency based on at least one of the first number of frequencies or the second number of frequencies, determine further includes identifying, for the hardware component of the UE, one or more harmonic frequencies associated with the at least one working frequency, select the other hardware working frequency based on the identifying, determine, from the first number of frequencies, that no other hardware working frequency has a number of interfering frequencies that satisfy a threshold, identify, from the second number of frequencies, another hardware working frequency that causes or potentially causes the smallest number of interfering frequencies, determine, based on the first set of frequencies and the second set of frequencies, that the number of interfering frequencies for another hardware working frequency is below a threshold, and identify, from the first number of frequencies, another hardware working frequency that causes or potentially causes the smallest number of interfering frequencies. In some cases, identifying one or more frequencies for wireless communications includes: identifying a first set of frequencies for wireless communication between the UE and a serving base station.

Wireless frequency update manager 745 may determine that the one or more frequencies for wireless communications by the UE with one or more networks have been updated, determine whether any of the one or more hardware working frequencies of the UE is a cause or potential cause of an interfering frequency with respect to the updated one or more frequencies for wireless communications by the UE with one or more networks, and receive a signal identifying the one or more frequencies for wireless communications by the UE with one or more networks.

Operational state manager 750 may determine an operational state of the UE, where the one or more frequencies for wireless communications by the UE with one or more networks is based on the operational state, determine that the operational state includes a radio frequency modem being disabled, and refrain from adjusting the at least one hardware working frequency based on the radio frequency modem being disabled.

FIG. 8 shows a diagram of a system 800 including a device 805 that supports reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure. Device 805 may be an example of or include the components of wireless device 505, wireless device 605, or a UE 115 as described above, e.g., with reference to FIGs. 5 and 6. Device 805 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including frequency arbitrator 815, processor 820, memory 825, software 830, transceiver 835, antenna 840, and I/O controller 845. These components may be in electronic communication via one or more buses (e.g., bus 810) . Device 805 may communicate wirelessly with one or more base stations 105.

Processor 820 may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a central processing unit (CPU) , a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some cases, processor 820 may be configured to operate a memory array using a memory controller. In other cases, a memory controller may be integrated into processor 820. Processor 820 may be configured to execute computer-readable instructions stored in a memory to perform various functions (e.g., functions or tasks supporting reducing UE RF front end desensing caused by interference from other UE hardware) .

Memory 825 may include random access memory (RAM) and read only memory (ROM) . The memory 825 may store computer-readable, computer-executable software 830 including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, the memory 825 may contain, among other things, a basic input/output system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.

Software 830 may include code to implement aspects of the present disclosure, including code to support reducing UE RF front end desensing caused by interference from other UE hardware. Software 830 may be stored in a non-transitory computer-readable medium such as system memory or other memory. In some cases, the software 830 may not be directly executable by the processor but may cause a computer (e.g., when compiled and executed) to perform functions described herein.

Transceiver 835 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above. For example, the transceiver 835 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 835 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.

In some cases, the wireless device may include a single antenna 840. However, in some cases the device may have more than one antenna 840, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

I/O controller 845 may manage input and output signals for device 805. I/O controller 845 may also manage peripherals not integrated into device 805. In some cases, I/O controller 845 may represent a physical connection or port to an external peripheral. In some cases, I/O controller 845 may utilize an operating system such as

MS-

or another known operating system. In other cases, I/O controller 845 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, I/O controller 845 may be implemented as part of a processor. In some cases, a user may interact with device 805 via I/O controller 845 or via hardware components controlled by I/O controller 845.

FIG. 9 shows a flowchart illustrating a method 900 for reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure. The operations of method 900 may be implemented by a UE 115 or its components as described herein. For example, the operations of method 900 may be performed by a frequency arbitrator as described with reference to FIGs. 5 through 8. In some examples, a UE 115 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 may perform aspects of the functions described below using special-purpose hardware.

At 905 the UE 115 may identify one or more hardware working frequencies of a UE.The operations of 905 may be performed according to the methods described herein. In certain examples, aspects of the operations of 905 may be performed by a hardware working frequency manager as described with reference to FIGs. 5 through 8.

At 910 the UE 115 may identify one or more frequencies for wireless communications by the UE with one or more networks. The operations of 910 may be performed according to the methods described herein. In certain examples, aspects of the operations of 910 may be performed by a wireless communication frequency manager as described with reference to FIGs. 5 through 8.

At 915 the UE 115 may determine that at least one hardware working frequency of the UE is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE. The operations of 915 may be performed according to the methods described herein. In certain examples, aspects of the operations of 915 may be performed by an interference manager as described with reference to FIGs. 5 through 8.

At 920 the UE 115 may adjust the at least one hardware working frequency based at least in part on the determination. The operations of 920 may be performed according to the methods described herein. In certain examples, aspects of the operations of 920 may be performed by a hardware working frequency manager as described with reference to FIGs. 5 through 8.

FIG. 10 shows a flowchart illustrating a method 1000 for reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure. The operations of method 1000 may be implemented by a UE 115 or its components as described herein. For example, the operations of method 1000 may be performed by a frequency arbitrator as described with reference to FIGs. 5 through 8. In some examples, a UE 115 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 may perform aspects of the functions described below using special-purpose hardware.

At 1005 the UE 115 may identify one or more hardware working frequencies of a UE.The operations of 1005 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1005 may be performed by a hardware working frequency manager as described with reference to FIGs. 5 through 8.

At 1010 the UE 115 may identify one or more frequencies for wireless communications by the UE with one or more networks. The operations of 1010 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1010 may be performed by a wireless communication frequency manager as described with reference to FIGs. 5 through 8.

At 1015 the UE 115 may determine that at least one hardware working frequency of the UE is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE. The operations of 1015 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1015 may be performed by an interference manager as described with reference to FIGs. 5 through 8.

At 1020 the UE 115 may adjust the at least one hardware working frequency based at least in part on the determination. The operations of 1020 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1020 may be performed by a hardware working frequency manager as described with reference to FIGs. 5 through 8.

At 1025 the UE 115 may identify that one or more hardware working frequencies of the UE includes identifying at least one working frequency of a hardware component of the UE. The operations of 1025 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1025 may be performed by a harmonic frequency manager as described with reference to FIGs. 5 through 8.

At 1030 the UE 115 may determine that the at least one hardware working frequency is a cause or potential cause of an interfering frequency by determining that a harmonic frequency associated with the at least one working frequency of the hardware component of the UE is a cause or potential cause of the interfering frequency. The operations of 1030 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1030 may be performed by a harmonic frequency manager as described with reference to FIGs. 5 through 8.

FIG. 11 shows a flowchart illustrating a method 1100 for reducing UE RF front end desensing caused by interference from other UE hardware in accordance with aspects of the present disclosure. The operations of method 1100 may be implemented by a UE 115 or its components as described herein. For example, the operations of method 1100 may be performed by a frequency arbitrator as described with reference to FIGs. 5 through 8. In some examples, a UE 115 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 may perform aspects of the functions described below using special-purpose hardware.

At 1105 the UE 115 may identify one or more hardware working frequencies of a UE.The operations of 1105 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1105 may be performed by a hardware working frequency manager as described with reference to FIGs. 5 through 8.

At 1110 the UE 115 may identify one or more frequencies for wireless communications by the UE with one or more networks. The operations of 1110 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1110 may be performed by a wireless communication frequency manager as described with reference to FIGs. 5 through 8.

At 1115 the UE 115 may determine that at least one hardware working frequency of the UE is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE. The operations of 1115 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1115 may be performed by an interference manager as described with reference to FIGs. 5 through 8.

At 1120 the UE 115 may adjust the at least one hardware working frequency based at least in part on the determination. The operations of 1120 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1120 may be performed by a hardware working frequency manager as described with reference to FIGs. 5 through 8.

At 1125 the UE 115 may determine that the one or more frequencies for wireless communications by the UE with one or more networks have been updated. The operations of 1125 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1125 may be performed by a wireless frequency update manager as described with reference to FIGs. 5 through 8.

At 1130 the UE 115 may determine whether any of the one or more hardware working frequencies of the UE is a cause or potential cause of an interfering frequency with respect to the updated one or more frequencies for wireless communications by the UE with one or more networks. The operations of 1130 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1130 may be performed by a wireless frequency update manager as described with reference to FIGs. 5 through 8.

It should be noted that the methods described above describe possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.

Techniques described herein may be used for various wireless communications 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. A CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA) , etc. CDMA2000 covers IS-2000, IS-95, and IS-856 standards. IS-2000 Releases may be commonly referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD) , etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. A TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM) .

An OFDMA system may implement a radio technology 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, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS) . LTE, LTE-A, and LTE-A Pro are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR, and GSM are described in documents from the 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 may be used for the systems and radio technologies mentioned above as well as other systems and radio technologies. While aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR applications.

A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs 115 with service subscriptions with the network provider. A small cell may be associated with a lower-powered base station 105, as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed, etc. ) frequency bands as macro cells. Small cells may include pico cells, femto cells, and micro cells according to various examples. A pico cell, for example, may cover a small geographic area and may allow unrestricted access by UEs 115 with service subscriptions with the network provider. A femto cell may also cover a small geographic area (e.g., a home) and may provide restricted access by UEs 115 having an association with the femto cell (e.g., UEs 115 in a closed subscriber group (CSG) , UEs 115 for users in the home, and the like) . An eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB. An eNB may support one or multiple (e.g., two, three, four, and the like) cells, and may also support communications using one or multiple component carriers.

The wireless communications system 100 or systems described herein may support synchronous or asynchronous operation. For synchronous operation, the base stations 105 may have similar frame timing, and transmissions from different base stations 105 may be approximately aligned in time. For asynchronous operation, the base stations 105 may have different frame timing, and transmissions from different base stations 105 may not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operations.

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 that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

The various illustrative blocks and modules described in connection with the disclosure herein may be implemented or performed with 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 (PLD) , discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, 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, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) .

o The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations. Also, as used herein, including in the claims, “or “as used in a list of items (for example, a list of items prefaced by a phrase such as “at least one of” or “one or more of” ) indicates an inclusive list such that, for example, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c., as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .

Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may 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 may comprise random-access memory (RAM) , read-only memory (ROM) , electrically erasable programmable read only memory (EEPROM) , flash memory, compact disk (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 means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the 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 microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, 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 are also included within the scope of computer-readable media.

As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” ) indicates an inclusive list such 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) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an exemplary step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. ”

In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label, or other subsequent reference label.

The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “exemplary” used herein means “serving as an example, instance, or illustration, ” and not “preferred” or “advantageous over other examples. ” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

The description herein is provided to enable a person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein, but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

Claims

A method for wireless communication, comprising:

identifying one or more hardware working frequencies of a user equipment (UE) ;

identifying one or more frequencies for wireless communications by the UE with one or more networks;

determining that at least one hardware working frequency of the UE is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE; and

adjusting the at least one hardware working frequency based at least in part on the determination.
The method of claim 1, further comprising:

identifying one or more hardware working frequencies of the UE includes identifying at least one working frequency of a hardware component of the UE; and

determining that the at least one hardware working frequency is a cause or potential cause of an interfering frequency comprises determining that a harmonic frequency associated with the at least one working frequency of the hardware component of the UE is a cause or potential cause of the interfering frequency.
The method of claim 1, further comprising:

identifying one or more hardware working frequencies of the UE includes identifying at least one working frequency of a hardware component of the UE; and

determining further comprises identifying, for the hardware component of the UE, one or more harmonic frequencies associated with the at least one working frequency.
The method of claim 3, wherein identifying one or more frequencies for wireless communications comprises:

identifying a first set of frequencies for wireless communication between the UE and a serving base station; and

identifying a second set of frequencies for wireless communication between the UE and one or more neighbor base stations.
The method of claim 4, further comprising:

determining, for the at least one hardware working frequency, a first number of frequencies that cause or potentially cause an interfering frequency with respect to the first set of frequencies;

determining, for the at least one hardware working frequency, a second number of frequencies that cause or potentially cause an interfering frequency with respect to the second set of frequencies; and

adjusting, for the hardware component, the at least one hardware working frequency to another hardware working frequency based at least in part on at least one of the first number of frequencies or the second number of frequencies.
The method of claim 5, further comprising:

identifying, from the first number of frequencies, another hardware working frequency that causes or potentially causes the smallest number of interfering frequencies; and

selecting the other hardware working frequency based at least in part on the identifying.
The method of claim 6, further comprising:

determining, from the first number of frequencies, that no other hardware working frequency has a number of interfering frequencies that satisfy a threshold;

identifying, from the second number of frequencies, another hardware working frequency that causes or potentially causes the smallest number of interfering frequencies; and

selecting the other hardware working frequency based at least in part on the identifying.
The method of claim 7, further comprising:

determining, based at least in part on the first set of frequencies and the second set of frequencies, that the number of interfering frequencies for another hardware working frequency is below a threshold; and

selecting the other hardware working frequency based at least in part on the determining.
The method of claim 1, further comprising:

determining that the one or more frequencies for wireless communications by the UE with one or more networks have been updated; and

determining whether any of the one or more hardware working frequencies of the UE is a cause or potential cause of an interfering frequency with respect to the updated one or more frequencies for wireless communications by the UE with one or more networks.
The method of claim 1, further comprising:

receiving a signal identifying the one or more frequencies for wireless communications by the UE with one or more networks.
The method of claim 1, further comprising:

determining an operational state of the UE, wherein the one or more frequencies for wireless communications by the UE with one or more networks is based at least in part on the operational state.
The method of claim 11, further comprising:

determining that the operational state comprises a radio frequency modem being disabled; and

refraining from adjusting the at least one hardware working frequency based at least in part on the radio frequency modem being disabled.
The method of claim 1, further comprising:

determining that the at least one hardware working frequency of the UE is cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE is performed at a modem of the UE or an application processing layer of the UE.
The method of claim 1, wherein the one or more frequencies for wireless communications by the UE with one or more networks are associated with at least one of a cellular radio access technology (RAT) , or a Wi-Fi RAT, or a Bluetooth RAT.
An apparatus for wireless communication, comprising:

means for identifying one or more hardware working frequencies of a user equipment (UE) ;

means for identifying one or more frequencies for wireless communications by the UE with one or more networks;

means for determining that at least one hardware working frequency of the UE is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE; and

means for adjusting the at least one hardware working frequency based at least in part on the determination.
The apparatus of claim 15, further comprising:

means for identifying one or more hardware working frequencies of the UE includes identifying at least one working frequency of a hardware component of the UE; and

means for determining that the at least one hardware working frequency is a cause or potential cause of an interfering frequency comprises determining that a harmonic frequency associated with the at least one working frequency of the hardware component of the UE is a cause or potential cause of the interfering frequency.
The apparatus of claim 15, further comprising:

means for identifying one or more hardware working frequencies of the UE includes identifying at least one working frequency of a hardware component of the UE; and

means for determining further comprises identifying, for the hardware component of the UE, one or more harmonic frequencies associated with the at least one working frequency.
The apparatus of claim 17, wherein the means for identifying one or more frequencies for wireless communications comprises:

means for identifying a first set of frequencies for wireless communication between the UE and a serving base station; and

means for identifying a second set of frequencies for wireless communication between the UE and one or more neighbor base stations.
The apparatus of claim 18, further comprising:

means for determining, for the at least one hardware working frequency, a first number of frequencies that cause or potentially cause an interfering frequency with respect to the first set of frequencies;

means for determining, for the at least one hardware working frequency, a second number of frequencies that cause or potentially cause an interfering frequency with respect to the second set of frequencies; and

means for adjusting, for the hardware component, the at least one hardware working frequency to another hardware working frequency based at least in part on at least one of the first number of frequencies or the second number of frequencies.
The apparatus of claim 19, further comprising:

means for identifying, from the first number of frequencies, another hardware working frequency that causes or potentially causes the smallest number of interfering frequencies; and

means for selecting the other hardware working frequency based at least in part on the identifying.
The apparatus of claim 20, further comprising:

means for determining, from the first number of frequencies, that no other hardware working frequency has a number of interfering frequencies that satisfy a threshold;

means for identifying, from the second number of frequencies, another hardware working frequency that causes or potentially causes the smallest number of interfering frequencies; and

means for selecting the other hardware working frequency based at least in part on the identifying.
The apparatus of claim 21, further comprising:

means for determining, based at least in part on the first set of frequencies and the second set of frequencies, that the number of interfering frequencies for another hardware working frequency is below a threshold; and

means for selecting the other hardware working frequency based at least in part on the determining.
The apparatus of claim 15, further comprising:

means for determining that the one or more frequencies for wireless communications by the UE with one or more networks have been updated; and

means for determining whether any of the one or more hardware working frequencies of the UE is a cause or potential cause of an interfering frequency with respect to the updated one or more frequencies for wireless communications by the UE with one or more networks.
The apparatus of claim 15, further comprising:

means for receiving a signal identifying the one or more frequencies for wireless communications by the UE with one or more networks.
The apparatus of claim 15, further comprising:

means for determining an operational state of the UE, wherein the one or more frequencies for wireless communications by the UE with one or more networks is based at least in part on the operational state.
The apparatus of claim 25, further comprising:

means for determining that the operational state comprises a radio frequency modem being disabled; and

means for refraining from adjusting the at least one hardware working frequency based at least in part on the radio frequency modem being disabled.
The apparatus of claim 15, further comprising:

means for determining that the at least one hardware working frequency of the UE is cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE is performed at a modem of the UE or an application processing layer of the UE.
The apparatus of claim 15, wherein the one or more frequencies for wireless communications by the UE with one or more networks are associated with at least one of a cellular radio access technology (RAT) , or a Wi-Fi RAT, or a Bluetooth RAT.
An apparatus for wireless communication, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

identify one or more hardware working frequencies of a user equipment (UE) ;

identify one or more frequencies for wireless communications by the UE with one or more networks;

determine that at least one hardware working frequency of the UE is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE; and

adjust the at least one hardware working frequency based at least in part on the determination.
The apparatus of claim 29, wherein the instructions are further executable by the processor to cause the apparatus to:

identify one or more hardware working frequencies of the UE includes identifying at least one working frequency of a hardware component of the UE; and

determine that the at least one hardware working frequency is a cause or potential cause of an interfering frequency comprises determining that a harmonic frequency associated with the at least one working frequency of the hardware component of the UE is a cause or potential cause of the interfering frequency.
The apparatus of claim 29, wherein the instructions are further executable by the processor to cause the apparatus to:

identify one or more hardware working frequencies of the UE includes identifying at least one working frequency of a hardware component of the UE; and

determine further comprises identifying, for the hardware component of the UE, one or more harmonic frequencies associated with the at least one working frequency.
The apparatus of claim 31, wherein the instructions to identify one or more frequencies for wireless communications are executable by the processor to cause the apparatus to:

identify a first set of frequencies for wireless communication between the UE and a serving base station; and

identify a second set of frequencies for wireless communication between the UE and one or more neighbor base stations.
The apparatus of claim 32, wherein the instructions are further executable by the processor to cause the apparatus to:

determine, for the at least one hardware working frequency, a first number of frequencies that cause or potentially cause an interfering frequency with respect to the first set of frequencies;

determine, for the at least one hardware working frequency, a second number of frequencies that cause or potentially cause an interfering frequency with respect to the second set of frequencies; and

adjust, for the hardware component, the at least one hardware working frequency to another hardware working frequency based at least in part on at least one of the first number of frequencies or the second number of frequencies.
The apparatus of claim 33, wherein the instructions are further executable by the processor to cause the apparatus to:

identify, from the first number of frequencies, another hardware working frequency that causes or potentially causes the smallest number of interfering frequencies; and

select the other hardware working frequency based at least in part on the identifying.
The apparatus of claim 34, wherein the instructions are further executable by the processor to cause the apparatus to:

determine, from the first number of frequencies, that no other hardware working frequency has a number of interfering frequencies that satisfy a threshold;

identify, from the second number of frequencies, another hardware working frequency that causes or potentially causes the smallest number of interfering frequencies; and

select the other hardware working frequency based at least in part on the identifying.
The apparatus of claim 35, wherein the instructions are further executable by the processor to cause the apparatus to:

determine, based at least in part on the first set of frequencies and the second set of frequencies, that the number of interfering frequencies for another hardware working frequency is below a threshold; and

select the other hardware working frequency based at least in part on the determining.
The apparatus of claim 29, wherein the instructions are further executable by the processor to cause the apparatus to:

determine that the one or more frequencies for wireless communications by the UE with one or more networks have been updated; and

determine whether any of the one or more hardware working frequencies of the UE is a cause or potential cause of an interfering frequency with respect to the updated one or more frequencies for wireless communications by the UE with one or more networks.
The apparatus of claim 29, wherein the instructions are further executable by the processor to cause the apparatus to:

receive a signal identifying the one or more frequencies for wireless communications by the UE with one or more networks.
The apparatus of claim 29, wherein the instructions are further executable by the processor to cause the apparatus to:

determine an operational state of the UE, wherein the one or more frequencies for wireless communications by the UE with one or more networks is based at least in part on the operational state.
The apparatus of claim 39, wherein the instructions are further executable by the processor to cause the apparatus to:

determine that the operational state comprises a radio frequency modem being disabled; and

refrain from adjusting the at least one hardware working frequency based at least in part on the radio frequency modem being disabled.
The apparatus of claim 29, wherein the instructions are further executable by the processor to cause the apparatus to:

determine that the at least one hardware working frequency of the UE is cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE is performed at a modem of the UE or an application processing layer of the UE.
The apparatus of claim 29, wherein the one or more frequencies for wireless communications by the UE with one or more networks are associated with at least one of a cellular radio access technology (RAT) , or a Wi-Fi RAT, or a Bluetooth RAT.
A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to:

identify one or more hardware working frequencies of a user equipment (UE) ;

identify one or more frequencies for wireless communications by the UE with one or more networks;

determine that at least one hardware working frequency of the UE is a cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE; and

adjust the at least one hardware working frequency based at least in part on the determination.
The non-transitory computer-readable medium of claim 43, wherein the instructions are further executable by the processor to:

identify one or more hardware working frequencies of the UE includes identifying at least one working frequency of a hardware component of the UE; and

determine that the at least one hardware working frequency is a cause or potential cause of an interfering frequency comprises determining that a harmonic frequency associated with the at least one working frequency of the hardware component of the UE is a cause or potential cause of the interfering frequency.
The non-transitory computer-readable medium of claim 43, wherein the instructions are further executable by the processor to:

identify one or more hardware working frequencies of the UE includes identifying at least one working frequency of a hardware component of the UE; and

determine further comprises identifying, for the hardware component of the UE, one or more harmonic frequencies associated with the at least one working frequency.
The non-transitory computer-readable medium of claim 45, wherein the instructions to identify one or more frequencies for wireless communications are executable by the processor to:

identify a first set of frequencies for wireless communication between the UE and a serving base station; and

identify a second set of frequencies for wireless communication between the UE and one or more neighbor base stations.
The non-transitory computer-readable medium of claim 46, wherein the instructions are further executable by the processor to:

determine, for the at least one hardware working frequency, a first number of frequencies that cause or potentially cause an interfering frequency with respect to the first set of frequencies;

determine, for the at least one hardware working frequency, a second number of frequencies that cause or potentially cause an interfering frequency with respect to the second set of frequencies; and

adjust, for the hardware component, the at least one hardware working frequency to another hardware working frequency based at least in part on at least one of the first number of frequencies or the second number of frequencies.
The non-transitory computer-readable medium of claim 47, wherein the instructions are further executable by the processor to:

identify, from the first number of frequencies, another hardware working frequency that causes or potentially causes the smallest number of interfering frequencies; and

select the other hardware working frequency based at least in part on the identifying.
The non-transitory computer-readable medium of claim 48, wherein the instructions are further executable by the processor to:

determine, from the first number of frequencies, that no other hardware working frequency has a number of interfering frequencies that satisfy a threshold;

identify, from the second number of frequencies, another hardware working frequency that causes or potentially causes the smallest number of interfering frequencies; and

select the other hardware working frequency based at least in part on the identifying.
The non-transitory computer-readable medium of claim 49, wherein the instructions are further executable by the processor to:

determine, based at least in part on the first set of frequencies and the second set of frequencies, that the number of interfering frequencies for another hardware working frequency is below a threshold; and

select the other hardware working frequency based at least in part on the determining.
The non-transitory computer-readable medium of claim 43, wherein the instructions are further executable by the processor to:

determine that the one or more frequencies for wireless communications by the UE with one or more networks have been updated; and

determine whether any of the one or more hardware working frequencies of the UE is a cause or potential cause of an interfering frequency with respect to the updated one or more frequencies for wireless communications by the UE with one or more networks.
The non-transitory computer-readable medium of claim 43, wherein the instructions are further executable by the processor to:

receive a signal identifying the one or more frequencies for wireless communications by the UE with one or more networks.
The non-transitory computer-readable medium of claim 43, wherein the instructions are further executable by the processor to:

determine an operational state of the UE, wherein the one or more frequencies for wireless communications by the UE with one or more networks is based at least in part on the operational state.
The non-transitory computer-readable medium of claim 53, wherein the instructions are further executable by the processor to:

determine that the operational state comprises a radio frequency modem being disabled; and

refrain from adjusting the at least one hardware working frequency based at least in part on the radio frequency modem being disabled.
The non-transitory computer-readable medium of claim 43, wherein the instructions are further executable by the processor to:

determine that the at least one hardware working frequency of the UE is cause or potential cause of an interfering frequency with respect to the one or more frequencies for wireless communications by the UE is performed at a modem of the UE or an application processing layer of the UE.
The non-transitory computer-readable medium of claim 43, wherein the one or more frequencies for wireless communications by the UE with one or more networks are associated with at least one of a cellular radio access technology (RAT) , or a Wi-Fi RAT, or a Bluetooth RAT.
A method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, and wireless communication device as substantially described herein with reference to and as illustrated by the accompanying drawings.