Method and apparatus for declaring a default operating frequency

Abstract

Methods, systems, and devices are described that provide for wireless communications in which a wireless device declares a default operating frequency. A first wireless device can identify one or more default operating frequencies for communicating over a bandwidth, where the default operating frequencies are predetermined by an antenna array configuration of the first wireless device. The first wireless device can transmit, to a second wireless device, an indication of the one or more default operating frequencies. The first wireless device or the second wireless device can select a communication parameter for communicating over the bandwidth based on the one or more default operating frequencies. The first and second wireless devices can communicate over the bandwidth based on the one or more default operating frequencies.

Description

[0001] Cross-referencing

[0002] This patent application claims priority to U.S. Patent Application No. 17 / 382,215, filed July 21, 2021, entitled “TECHNIQUES FOR DECLARING DEFAULT OPERATING FREQUENCIES”, filed by Raghavan et al., which claims the benefit of U.S. Provisional Patent Application No. 63 / 058,288, filed July 29, 2020, entitled “TECHNIQUES FOR DECLARING DEFAULT OPERATING FREQUENCIES”, which has been assigned to the assignee of this application. Technical Field

[0003] This disclosure relates to wireless communications, including techniques for declaring default operating frequencies. Background Technology

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, message sending and receiving, broadcasting, and so on. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth-generation (4G) systems (such as Long Term Evolution (LTE) systems, LTE-A Advanced (LTE-A) systems, or LTE-A Pro systems) and fifth-generation (5G) systems, which may be referred to as NR systems. These systems can employ various technologies, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-S-OFDM).

[0005] Wireless multiple access communication systems may include one or more base stations or one or more network access nodes, each of which simultaneously supports communication from multiple communication devices, which may also be referred to as user equipment (UE). Some wireless communication systems may support beamforming communication using one or more antenna arrays. However, in some cases, communication performance in certain frequency ranges may be affected by the antenna array configuration of the UE.

[0006] Overview

[0007] The described technology relates to improved methods, systems, devices, and apparatuses for supporting techniques for declaring default operating frequencies. Generally, the described technology enables a wireless device to identify one or more default operating frequencies within an ultra-wide bandwidth and transmit indications of these default operating frequencies to one or more other wireless devices. Another wireless device receiving this indication of the default operating frequencies can then adjust communication parameters based on these default operating frequencies. The default operating frequencies can vary from device to device and can be based on the hardware configuration used for communication over the ultra-wide bandwidth (e.g., number of radio frequency (RF) chains, antenna element spacing, etc.). As an example, a first wireless device can indicate a first default operating frequency to a second wireless device based on the antenna configuration of the first wireless device. The second wireless device can use the indication of the default operating frequency to modify or adjust one or more communication parameters to enhance communication performance between devices.

[0008] A method for wireless communication at a first wireless device is described. The method may include: identifying one or more default operating frequencies for communication over a bandwidth by the first wireless device, each of the one or more default operating frequencies being predefined by an antenna array configuration of the first wireless device; transmitting to a second wireless device a message including an indication of the one or more default operating frequencies of the first wireless device; and communicating with the second wireless device over the bandwidth based on the one or more default operating frequencies.

[0009] An apparatus for wireless communication at a first wireless device is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. These instructions are executable by the processor to cause the apparatus to: identify one or more default operating frequencies for communication over a bandwidth by the first wireless device, each of the one or more default operating frequencies being predetermined by an antenna array configuration of the first wireless device; transmit a message to a second wireless device including an indication of the one or more default operating frequencies of the first wireless device; and communicate with the second wireless device over the bandwidth based on the one or more default operating frequencies.

[0010] Another apparatus for wireless communication at a first wireless device is described. The apparatus may include means for: identifying one or more default operating frequencies for communication over a bandwidth by the first wireless device, each of the one or more default operating frequencies being predetermined by an antenna array configuration of the first wireless device; transmitting to a second wireless device a message including an indication of the one or more default operating frequencies of the first wireless device; and communicating with the second wireless device over the bandwidth based on the one or more default operating frequencies.

[0011] A non-transient computer-readable medium is described, storing code for wireless communication at a first wireless device. The code may include instructions executable by a processor for: identifying one or more default operating frequencies for communication over a bandwidth by the first wireless device, each of the one or more default operating frequencies being predetermined by an antenna array configuration of the first wireless device; transmitting a message to a second wireless device including an indication of the one or more default operating frequencies of the first wireless device; and communicating with the second wireless device over the bandwidth based on the one or more default operating frequencies.

[0012] Some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein may further include operations, features, means, or instructions for: receiving first system information, the first system information including parameters indicating a mapping for a set comprising one or more cells, wherein each cell in the set comprising one or more cells operates using at least one antenna array configuration identical to the antenna array configuration of a first wireless device; storing the first system information including the parameters; comparing the stored first system information with second system information received from the first cell in the set comprising one or more cells; and based on the comparison, communicating with one or more wireless devices associated with the first cell using the one or more default operating frequencies.

[0013] Some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein may further include operations, features, means, or instructions for: receiving a second message from a second wireless device, the second message including an indication of one or more default operating frequencies of the second wireless device; and determining the one or more default operating frequencies of the second wireless device based on the second message, wherein the one or more default operating frequencies of the second wireless device may be determined by at least the following: the antenna configuration of the second wireless device, or one or more carrier frequencies associated with the analog beamforming codebook of the second wireless device, or frequency bands from a set of frequency bands, or channels from a set of channels, or any combination thereof.

[0014] Some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein may further include operations, features, means or instructions for selecting one or more communication parameters based on one or more default operating frequencies of a first wireless device and one or more default operating frequencies of a second wireless device, wherein communication with the second wireless device on that bandwidth may be based on the selected one or more communication parameters.

[0015] In some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein, the one or more communication parameters include beamforming parameters of an analog beamforming codebook associated with the antenna array of a first wireless device.

[0016] Some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein may further include operations, features, means or instructions for: selecting at least the frequency band, or the channel, or any combination thereof, for communication with the second wireless device based on the one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device, wherein communication with the second wireless device on the bandwidth may be based on the selected frequency band, or channel, or any combination thereof.

[0017] Some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein may further include operations, features, means or instructions for: determining that a first default operating frequency of a first wireless device and a second default operating frequency of a second wireless device satisfy a predetermined threshold difference; and selecting a third default operating frequency of the first wireless device based on the determination, the third default operating frequency being different from the first default operating frequency, wherein communication with the second wireless device on this bandwidth may be based on the third default operating frequency.

[0018] In some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein, identifying the one or more default operating frequencies may include operations, features, means, or instructions for the following actions: identifying a first operating frequency boundary and a second operating frequency boundary for each of the one or more default operating frequencies, wherein the first operating frequency boundary is different from the second operating frequency boundary, wherein the indication of the one or more default operating frequencies includes an indication of at least the first operating frequency boundary, or the second operating frequency boundary, or any combination thereof.

[0019] In some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein, a first operating frequency boundary includes an upper frequency boundary and a second operating frequency boundary includes a lower frequency boundary, wherein one or more operating frequencies within the upper and lower frequency boundaries provide beamforming performance that satisfies a performance threshold based on a signal strength threshold for communication on the one or more operating frequencies.

[0020] In some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein, transmitting a message including an indication of one or more default operating frequencies of a first wireless device may include an operation, feature, means, or instruction for transmitting a capability message including an indication of one or more default operating frequencies of the first wireless device to a second wireless device.

[0021] In some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein, transmitting a message including an indication of one or more default operating frequencies of a first wireless device may include operations, features, means, or instructions for transmitting control information including an indication of one or more default operating frequencies of the first wireless device to a second wireless device.

[0022] In some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein, the one or more default operating frequencies of the first wireless device indicate a performance metric for the set of frequencies on that bandwidth.

[0023] In some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein, the one or more default operating frequencies of the first wireless device indicate the antenna array configuration of the first wireless device, which includes the inter-antenna spacing of an antenna array having uniformly spaced antenna elements or non-uniformly spaced antenna elements.

[0024] In some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein, the antenna array configuration includes the number of RF chains associated with the antenna array of the first wireless device.

[0025] In some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein, the one or more default operating frequencies may be specific to a first wireless device.

[0026] In some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein, the first wireless device or the second wireless device or both include a user equipment (UE), or a client equipment (CPE), or a base station, or an integrated access and backhaul (IAB) node, or a wireless repeater, or a sidelink node.

[0027] A method for wireless communication at a first wireless device is described. The method may include: receiving from a second wireless device a message including an indication of one or more default operating frequencies of the second wireless device, the one or more default operating frequencies for communication over a bandwidth being configured based on an antenna array of the second wireless device; configuring one or more communication parameters based on the one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device; and communicating with the second wireless device over the bandwidth based on the one or more communication parameters.

[0028] An apparatus for wireless communication at a first wireless device is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. These instructions are executable by the processor to cause the apparatus to: receive from a second wireless device a message including an indication of one or more default operating frequencies of the second wireless device, the one or more default operating frequencies for communication over a bandwidth being configured based on an antenna array of the second wireless device; configure one or more communication parameters based on the one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device; and communicate with the second wireless device over the bandwidth based on the one or more communication parameters.

[0029] Another apparatus for wireless communication at a first wireless device is described. The apparatus may include means for: receiving from a second wireless device a message including an indication of one or more default operating frequencies of the second wireless device, the one or more default operating frequencies for communication over a bandwidth being configured based on an antenna array of the second wireless device; configuring one or more communication parameters based on the one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device; and communicating with the second wireless device over the bandwidth based on the one or more communication parameters.

[0030] A non-transient computer-readable medium is described, storing code for wireless communication at a first wireless device. The code may include instructions executable by a processor for: receiving from a second wireless device a message including an indication of one or more default operating frequencies of the second wireless device, the one or more default operating frequencies for communication over a bandwidth being configured based on an antenna array of the second wireless device; configuring one or more communication parameters based on the one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device; and communicating with the second wireless device over the bandwidth based on the one or more communication parameters.

[0031] Some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein may further include operations, features, means or instructions for transmitting system information, including parameters indicating a mapping for a set comprising one or more cellular cells, wherein each cellular cell in the set comprising one or more cellular cells operates using at least one antenna array configuration identical to the antenna array configuration of the second wireless device.

[0032] Some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein may further include operations, features, means, or instructions for: identifying at least the antenna array configuration of the second wireless device, or one or more carrier frequencies, or any combination thereof, corresponding to the analog beamforming codebook of the second wireless device, based on the one or more default operating frequencies; and selecting the one or more communication parameters based on the antenna array configuration of the second wireless device, the one or more carrier frequencies, or any combination thereof.

[0033] Some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein may further include operations, features, means or instructions for: identifying at least a frequency band from a set of frequency bands, or a channel from a set of channels, or any combination thereof, based on the one or more default operating frequencies; and selecting the one or more communication parameters based on the frequency band, or the channel, or any combination thereof.

[0034] Some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein may further include operations, features, means or instructions for estimating the simulated beamforming performance of a set of frequencies over the bandwidth, wherein the one or more default operating frequencies of the second wireless device indicate a performance metric for the set of frequencies.

[0035] Some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein may further include operations, features, means or instructions for: determining that a first default operating frequency of a first wireless device and a second default operating frequency of a second wireless device satisfy a predetermined threshold difference; and selecting a third default operating frequency of the first wireless device based on the determination, the third default operating frequency being different from the first default operating frequency, wherein communication with the second wireless device within the bandwidth may be based on the third default operating frequency.

[0036] Some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein may further include operations, features, means or instructions for identifying a first operating frequency boundary and a second operating frequency boundary of the one or more default operating frequencies of a second wireless device according to the indication of the one or more default operating frequencies, wherein the first operating frequency boundary is different from the second operating frequency boundary, and communication with the second wireless device on the bandwidth may be based on the first operating frequency boundary, or the second operating frequency boundary, or any combination thereof.

[0037] In some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein, a first operating frequency boundary includes an upper frequency boundary and a second operating frequency boundary includes a lower frequency boundary, wherein one or more operating frequencies within the upper and lower frequency boundaries provide beamforming performance that satisfies a performance threshold based on a signal strength threshold for communication on the one or more operating frequencies.

[0038] In some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein, the one or more communication parameters include analog beamforming parameters of an analog beamforming codebook associated with an antenna array of a second wireless device.

[0039] In some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein, receiving an indication of one or more default operating frequencies of a second wireless device may include operations, features, means, or instructions for receiving a capability message from the second wireless device that includes an indication of one or more default operating frequencies of a first wireless device.

[0040] In some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein, receiving an indication of one or more default operating frequencies of a second wireless device may include operations, features, means, or instructions for receiving control information from the second wireless device that includes an indication of one or more default operating frequencies of a first wireless device.

[0041] In some examples of the methods, apparatus (equipment) and non-transient computer-readable media described herein, the one or more default operating frequencies of the second wireless device indicate the antenna array configuration of the second wireless device, which includes the inter-antenna spacing of an antenna array having uniformly spaced antenna elements or non-uniformly spaced antenna elements. Brief description of the attached diagram

[0043] Figure 1 Examples of wireless communication systems that support techniques for declaring default operating frequencies according to various aspects of this disclosure are explained.

[0044] Figure 2 Examples of wireless communication systems that support techniques for declaring default operating frequencies according to various aspects of this disclosure are explained.

[0045] Figure 3 An example of a process flow for declaring a default operating frequency is explained, based on various aspects of this disclosure.

[0046] Figure 4 and Figure 5 A block diagram of a device supporting techniques for declaring a default operating frequency, according to various aspects of this disclosure, is shown.

[0047] Figure 6 A block diagram of a communication manager supporting techniques for declaring default operating frequencies, according to various aspects of this disclosure, is shown.

[0048] Figure 7 A diagram is shown of a system including a user equipment (UE) that supports a technology for declaring a default operating frequency, according to various aspects of this disclosure.

[0049] Figure 8 A diagram is shown of a system including a base station supporting a technique for declaring a default operating frequency, according to various aspects of this disclosure.

[0050] Figures 9 to 13 A flowchart illustrating a method for declaring a default operating frequency, supporting various aspects of this disclosure, is shown.

[0051] Detailed description

[0052] Some wireless communication systems can support wireless communication in relatively high frequency ranges (such as frequency range 4 (FR4) (e.g., encompassing the 52.6 GHz – 114.25 GHz band) (which may be referred to as the upper millimeter-wave (mmW) band, sub-THz region, etc.)). Communication in such frequency ranges can utilize ultra-wide bandwidths (e.g., 14 GHz bandwidth, 25 GHz bandwidth, bandwidths greater than 3 GHz, etc.), which enables enhanced communication performance at the corresponding frequencies. However, wireless devices (e.g., UEs, base stations, etc.) may have limited communication capabilities across all bands or frequencies of the ultra-wide bandwidth. As an example, a single radio frequency (RF) chain for an antenna array at a wireless device may be used across the entire ultra-wide bandwidth, but this RF chain may have a hardware configuration (e.g., antenna element spacing) suitable for beamforming on a subset of frequencies within that bandwidth (e.g., a relatively limited number of frequencies). For example, the antenna element spacing may be fixed at a value that provides optimal beamforming performance at a certain frequency (e.g., anchor frequency or default operating frequency). However, this interval can result in array gain and / or beamforming loss at frequencies different from the default operating frequency (e.g., above or below the anchor frequency), which can lead to beamform distortion (e.g., beam tilt) of the main lobe, side lobes, and / or grating lobes at other frequencies. Communication performance at these other frequencies within the ultra-wide bandwidth can therefore be constrained by the array configuration of the device and the number of RF chains, etc.

[0053] To avoid beamforming loss over ultra-wide bandwidth, and as described herein, a wireless device may identify one or more default operating frequencies within the ultra-wide bandwidth and transmit indications of these default operating frequencies to one or more other wireless devices. The default operating frequencies may vary from device to device and may be based on the hardware configuration used for communication over the ultra-wide bandwidth (e.g., number of RF chains, antenna element spacing). As an example, a first wireless device may indicate a first default operating frequency to a second wireless device based on the antenna configuration of the first wireless device. The second wireless device may use the indication of the default operating frequency to modify or adjust one or more communication parameters. These devices may then communicate over the bandwidth based on the one or more default operating frequencies. In some examples, the first device may identify and indicate multiple default operating frequencies (e.g., based on multiple RF chains of the first device).

[0054] The default operating frequencies of one or more devices enable these wireless devices to determine communication performance at other frequencies within an ultra-wide bandwidth and adjust communication parameters accordingly. For example, a second device might operate at a frequency different from the first device's first default operating frequency, which could result in beamforming loss during communication between the two devices. However, based on an indication of the first default operating frequency, the second device could instead select a different frequency band or channel on which to communicate. In other examples, the second device could modify beamforming parameters of an analog beamforming codebook based on an indication of the first default operating frequency. In some other examples, a range or upper and lower limits of the default operating frequency can be indicated, and each device can adjust one or more communication parameters based on the upper and lower limits. Here, the upper and lower limits may indicate frequencies at which communication performance can be achieved according to a certain performance threshold (e.g., based on a predetermined signal strength threshold for transmission within these limits). Selecting and / or adjusting parameters based on one or more default operating frequencies can provide more efficient communication between devices and can reduce array gain degradation due to beamform distortion. Similarly, enhanced communication performance gained by sharing the default operating frequency can provide relatively increased throughput and higher reliability, thereby enhancing the user experience.

[0055] In some examples, the wireless device may store system information, including parameters that provide a mapping of nearby cells with similar hardware configurations. In some cases, this parameter may be a System Information Block (SIB) parameter (e.g., areaScopeFrequency) and may be processed similarly to other SIB parameters (e.g., areaScope parameters or other parameters). When the wireless device connects to or reconnects to one of the cells indicated by the parameter, the wireless device may compare the stored system information with system information received from that cell. If the stored system information is the same as the system information received from that cell, the device may know the default operating frequency and / or antenna configurations that can be used in that cell (e.g., because they may be similar to the wireless device's default operating frequency). The device may then communicate with one or more other wireless devices in that cell.

[0056] The aspects of this disclosure are initially described in the context of a wireless communication system. The aspects of this disclosure are then explained by process flow. The aspects of this disclosure are further explained and described with reference to apparatus diagrams, system diagrams, and flowcharts relating to the technology used to declare the default operating frequency.

[0057] Figure 1Examples of wireless communication system 100 supporting techniques for declaring default operating frequencies according to various aspects of this disclosure are described. Wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, wireless communication system 100 may be a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low latency communication, communication with low-cost and low-complexity devices, or any combination thereof.

[0058] Base station 105 can be distributed across a geographical area to form wireless communication system 100, and can be different types of devices or devices with different capabilities. Base station 105 and UE 115 can communicate wirelessly via one or more communication links 125. Each base station 105 can provide a coverage area 110, and UE 115 and base station 105 can establish one or more communication links 125 on the coverage area 110. Coverage area 110 can be an example of a geographical area over which base station 105 and UE 115 can support signal communication according to one or more radio access technologies.

[0059] Each UE 115 can be distributed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 can be stationary or mobile, or stationary and mobile at different times. Each UE 115 can be a different type of device or a device with different capabilities. Figure 1 The document describes some example UE 115s. The UE 115 described herein can communicate with various types of devices, such as other UE 115s, base station 105, or network equipment (e.g., core network nodes, relay equipment, integrated access and backhaul (IAB) nodes, or other network equipment). Figure 1 As shown in the image.

[0060] Each base station 105 may communicate with the core network 130, or with each other, or both. For example, base station 105 may interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). Base stations 105 may communicate with each other directly (e.g., directly between base stations 105), indirectly (e.g., via the core network 130), or directly and indirectly on backhaul links 120 (e.g., via X2, Xn, or other interfaces). In some examples, backhaul link 120 may be or include one or more radio links.

[0061] One or more of the base stations 105 described herein may include, or may be referred to by those skilled in the art as, base transceiver station, radio base station, access point, radio transceiver, B node, evolved B node (eNB), next-generation B node or gigabit B node (any of which may be referred to as gNB), home B node, home evolved B node, or other suitable terms.

[0062] UE 115 may include or be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or any other suitable term, wherein "device" may also be referred to as a unit, station, terminal, or client, etc. UE 115 may also include or be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine-type communication (MTC) device, which may be implemented in various objects such as appliances or vehicles, meters, etc.

[0063] The UE 115 described herein can communicate with various types of devices, such as other UEs 115 that sometimes act as relays, as well as base station 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, relay base stations, etc. Figure 1 As shown in the image.

[0064] UE 115 and base station 105 can wirelessly communicate with each other via one or more communication links 125 on one or more carriers. The term "carrier" can refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communication link 125. For example, a carrier for communication link 125 may include a portion of the radio spectrum band (e.g., a bandwidth portion (BWP)) operating according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling coordinating carrier operation, user data, or other signaling. Wireless communication system 100 may support communication with UE 115 using carrier aggregation or multi-carrier operation. UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used in conjunction with both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0065] In some examples (e.g., in a carrier aggregation configuration), the carrier may also have acquisition signaling or control signaling to coordinate the operation of other carriers. The carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be located according to a channel grid for discovery by UE 115. The carrier may operate in an autonomous mode in which initial acquisition and connection can be performed by UE 115 via that carrier, or in a non-autonomous mode in which the carrier may connect to carriers anchored using different carriers (e.g., different carriers of the same or different radio access technologies).

[0066] The communication link 125 shown in the wireless communication system 100 may include uplink transmission from UE 115 to base station 105, or downlink transmission from base station 105 to UE 115. The carrier may carry downlink or uplink communication (e.g., in FDD mode), or may be configured to carry both downlink and uplink communication (e.g., in TDD mode).

[0067] A carrier may be associated with a specific bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the carrier or the “system bandwidth” of the wireless communication system 100. For example, the carrier bandwidth may be one of several defined bandwidths (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz) of a carrier for a particular radio access technology. Devices of the wireless communication system 100 (e.g., base station 105, UE 115, or both) may have a hardware configuration that supports communication over a specific carrier bandwidth, or may be configurable to support communication over a single carrier bandwidth within a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate over a portion (e.g., a subband, BWP) or all of the carrier bandwidth.

[0068] The signal waveform transmitted on the carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform extended OFDM (DFT-S-OFDM)). In a system employing MCM, a resource element may include a symbol period (e.g., the duration of a modulation symbol) and a 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, the code rate of the modulation scheme, or both). Thus, the more resource elements the UE 115 receives and the higher the order of the modulation scheme, the higher the data rate the UE 115 can achieve. Wireless communication resources can refer to a combination of radio frequency spectrum resources, temporal resources, and spatial resources (e.g., spatial layers or beams), and using multiple spatial layers can further improve the data rate or data integrity of communication with the UE 115.

[0069] One or more sets of parameters can be supported for a carrier, where the parameter set may include the subcarrier spacing (Δf) and the cyclic prefix. A carrier can be divided into one or more BWPs with the same or different parameter designs. In some examples, the UE115 can be configured with multiple BWPs. In some examples, a single BWP for a carrier can be active at a given time, and communication for the UE115 can be limited to one or more active BWPs.

[0070] The time interval of base station 105 or UE 115 can be expressed as a multiple of a basic time unit, such as the sampling period T. s =1 / (△f) max ·N f ) seconds, where Δf max This can represent the maximum supported subcarrier spacing, while N f This can represent the maximum supported Discrete Fourier Transform (DFT) size. The time interval of the communication resources can be organized according to radio frames, each with a specified duration (e.g., 10 milliseconds (ms)). Each radio frame can be identified by a System Frame Number (SFN) (e.g., ranging from 0 to 1023).

[0071] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may (e.g., in the time domain) be divided into subframes, and each subframe may be further divided into several time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include several symbol periods (e.g., depending on the length of the cyclic prefix added before each symbol period). In some wireless communication systems 100, time slots may be further divided into multiple mini-time slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N) symbols. f (Number) sampling periods. The duration of a symbol period can depend on the subcarrier interval or the operating frequency band.

[0072] A subframe, time slot, mini-slot, or symbol can be the smallest scheduling unit of the wireless communication system 100 (e.g., in the time domain) and can be referred to as a transmission time interval (TTI). In some examples, the duration of the TTI (e.g., the number of symbol periods in the TTI) can be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 can be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0073] Physical channels can be multiplexed on a carrier using various techniques. Physical control channels and physical data channels can be multiplexed on a downlink carrier, for example, using one or more of Time Division Multiplexing (TDM), Frequency Division Multiplexing (FDM), or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for physical control channels can be defined by the number of symbol periods and can extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESET) can be configured for a set of UEs 115. For example, one or more UEs 115 can monitor or search control regions for control information based on one or more search space sets, and each search space set can include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for control channel candidates can refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with coded information in a control information format having a given payload size. The search space set may include a common search space set configured to send control information to multiple UEs 115 and a UE-specific search space set configured to send control information to a specific UE 115.

[0074] Each base station 105 may provide communication coverage via one or more cells (e.g., macrocells, small cells, hotspots, or other types of cells, or any combination thereof). The term "cell" may refer to a logical communication entity used to communicate with base station 105 (e.g., on a carrier) and may be associated with an identifier used to distinguish adjacent cells (e.g., Physical Cell Identifier (PCID), Virtual Cell Identifier (VCID), or others). In some examples, a cell may also refer to a geographic coverage area 110 or a portion of geographic coverage area 110 (e.g., a sector) on which a logical communication entity operates. The extent of such cells may vary from smaller areas (e.g., structures, subsets of structures) to larger areas depending on various factors (such as the capabilities of base station 105). For example, a cell may be or include buildings, subsets of buildings, or external space between or overlapping geographic coverage areas 110, among other examples.

[0075] Macrocells typically cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access for UEs 115 that have service subscriptions with a network provider supporting the macrocell. Small cells may be associated with a lower-power base station 105 (compared to macrocells) and may operate in the same or different (e.g., licensed or unlicensed) frequency bands as macrocells. Small cells may provide unrestricted access to UEs 115 that have service subscriptions with a network provider, or may provide restricted access to UEs 115 associated with the small cell (e.g., UEs 115 in a Closed Subscriber Group (CSG), or UEs 115 associated with a user in a home or office). Base station 105 may support one or more cells and may also support communication on one or more cells using one or more component carriers.

[0076] In some examples, a carrier can support multiple cells and can be configured with different cells based on different protocol types that can provide access for different types of devices (e.g., MTC, Narrowband IoT (NB-IoT), Enhanced Mobile Broadband (eMBB)).

[0077] In some examples, base station 105 may be mobile, and thus provide communication coverage to mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. Wireless communication system 100 may include, for example, a heterogeneous network, in which different types of base stations 105 use the same or different radio access technologies to provide coverage to various geographic coverage areas 110.

[0078] The wireless communication system 100 can support synchronous or asynchronous operation. For synchronous operation, base stations 105 can have similar frame timing, and transmissions from different base stations 105 can be approximately time-aligned. For asynchronous operation, base stations 105 can have different frame timing, and transmissions from different base stations 105 may not be time-aligned in some examples. The techniques described herein can be used for both synchronous and asynchronous operation.

[0079] Some UE 115 devices (such as MTC or IoT devices) can be low-cost or low-complexity devices and can provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC can refer to data communication technologies that allow devices to communicate with each other or with base station 105 without human intervention. In some examples, M2M communication or MTC may include communication from devices that have integrated sensors or meters to measure or capture information and relay such information to a central server or application that uses the information or presents it to people interacting with the application. Some UE 115 devices may be designed to collect information or automate the behavior of machines or other devices. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wilderness survival monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial toll collection.

[0080] Some UEs 115 can be configured to operate in reduced-power modes, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but not simultaneous transmission and reception). In some examples, half-duplex communication can be performed at a reduced peak rate. Other power-saving techniques for UEs 115 include entering a power-saving deep sleep mode when not engaged in active communication, operating on limited bandwidth (e.g., according to narrowband communication), or a combination of these techniques. For example, some UEs 115 can be configured to operate using a narrowband protocol type associated with a defined portion or range (e.g., subcarriers or resource block (RB) set) within the carrier, within the carrier's guard band, or outside the carrier.

[0081] Wireless communication system 100 may be configured to support ultra-reliable communication or low latency communication, or various combinations thereof. For example, wireless communication system 100 may be configured to support ultra-reliable low latency communication (URLLC) or mission-critical communication. UE 115 may be designed to support ultra-reliable, low latency, or mission-critical functions (e.g., mission-critical functions). Ultra-reliable communication may include private or group communication and may be supported by one or more mission-critical services, such as Mission-Critical Talk-to-Talk (MCPTT), Mission-Critical Video (MCVideo), or Mission-Critical Data (MCData)). Support for mission-critical functions may include prioritization of services, and mission-critical services may be used for public safety or general business applications. The terms ultra-reliable, low latency, mission-critical, and ultra-reliable low latency are used interchangeably herein.

[0082] In some examples, UE 115 may also be able to communicate directly with other UE 115 on a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UE 115s utilizing D2D communication may be within the geographic coverage area 110 of base station 105. Other UE 115s in such a group may be outside the geographic coverage area 110 of base station 105 or may be unable to receive transmissions from base station 105 for other reasons. In some examples, groups of UE 115s communicating via D2D communication may utilize a one-to-many (1:M) system, where each UE 115 transmits to every other UE 115 in the group. In some examples, base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between the individual UE 115s without involving base station 105.

[0083] In some systems, the D2D communication link 135 may be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, vehicles may communicate using vehicle-to-vehicle (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these communications. Vehicles may signal information related to traffic conditions, signaling, weather, safety, emergencies, or any other information relevant to the V2X system. In some examples, vehicles in a V2X system may communicate via vehicle-to-network (V2N) communication through one or more network nodes (e.g., base station 105) with roadside infrastructure (such as roadside units), or with the network, or with both.

[0084] Core network 130 provides user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. Core network 130 can be an evolved packet core (EPC) or a 5G core (5GC). The EPC or 5GC may include at least one control plane entity (e.g., a Mobility Management Entity (MME), Access and Mobility Management Function (AMF)) for managing access and mobility, and at least one user plane entity (e.g., a Serving Gateway (S-GW), Packet Data Network (PDN) Gateway (P-GW), or User Plane Function (UPF)) for routing packets or interconnecting to external networks. The control plane entity manages non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of UE 115 served by base station 105 associated with core network 130. User IP packets can be delivered through the user plane entity, which provides IP address allocation and other functions. The user plane entity can connect to network operator IP service 150. Carrier IP services 150 may include access to the Internet, intranets, IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0085] Some network devices (such as base station 105) may include sub-components, such as access network entity 140, which may be an example of an access node controller (ANC). Each access network entity 140 may communicate with each UE 115 through one or more other access network transport entities 145, which may be referred to as a radio headend, smart radio headend, or transmit / receive point (TRP). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio headends and ANCs) or combined into a single network device (e.g., base station 105).

[0086] Wireless communication system 100 can operate using one or more frequency bands in the range of 300 MHz to 300 GHz. Generally, the 300 MHz to 3 GHz band is referred to as a UHF band or decimeter band because the wavelengths range from about 1 decimeter to 1 meter. UHF waves can be blocked or redirected by buildings and environmental features, but these waves can penetrate various structures sufficiently for macrocells to provide service to UE 115 located indoors. Compared to transmissions using smaller frequencies and longer waves in the lower HF or VHF portions of the spectrum below 300 MHz, UHF wave transmission can be associated with smaller antennas and shorter ranges (e.g., less than 100 km).

[0087] The wireless communication system 100 can also operate in the ultra-high frequency (SHF) zoning using a frequency band from 3 GHz to 30 GHz (also known as the centimeter band) or in the extremely high frequency (EHF) zoning using a spectrum (e.g., from 30 GHz to 300 GHz) (also known as the millimeter band). In some examples, the wireless communication system 100 can support millimeter-wave (mmW) communication between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices can be smaller and more closely spaced than UHF antennas. In some examples, this can facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may suffer even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. The techniques disclosed herein can be employed across transmissions using one or more different frequency zonings, and the frequency band usage specified across these frequency zonings may vary by country or regulatory authority.

[0088] Wireless communication system 100 may utilize both licensed and unlicensed radio spectrum bands. For example, wireless communication system 100 may employ licensed assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in unlicensed frequency bands (such as the 5 GHz Industrial, Scientific, and Medical (ISM) band). Devices in wireless communication system 100 may communicate on unlicensed spectrum (such as the 5 GHz band, 2.4 GHz band, 60 GHz band, 3.6 GHz band, and / or 900 MHz band). Unlicensed spectrum may also include other frequency bands. When operating in unlicensed radio spectrum bands, devices (such as base station 105 and UE 115) may employ carrier sensing for collision detection and avoidance. In some examples, operation in unlicensed frequency bands may be based on carrier aggregation configuration (e.g., LAA) in coordination with component carriers operating in licensed frequency bands. Operation in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, etc.

[0089] Base station 105 or UE 115 may be equipped with multiple antennas that can be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels that can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may coexist at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with base station 105 may be located in different geographical locations. Base station 105 may have an antenna array with several rows and columns of antenna ports that base station 105 can use to support beamforming for communication with UE 115. Similarly, UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0090] Base station 105 or UE 115 can use MIMO communication to leverage multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers. This technique is known as spatial multiplexing. For example, a transmitting device may transmit multiple signals via different antennas or different combinations of antennas. Similarly, a receiving device may receive multiple signals 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 (e.g., different codewords). 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 multi-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.

[0091] Beamforming (also known as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting or receiving device (e.g., base station 105, UE 115) to shape or guide an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting and receiving devices. Beamforming can be achieved by combining signals transmitted via antenna elements of an antenna array, such that some signals propagating relative to a particular orientation of the antenna array experience constructive interference, while others experience destructive interference. Adjustments to the signals transmitted via the antenna elements may include the transmitting or receiving device applying amplitude offset, phase offset, or both to the signals carried via the antenna elements associated with that device. The adjustments associated with each antenna element may be defined by a beamforming weight set associated with a particular orientation (e.g., the antenna array relative to the transmitting or receiving device, or relative to some other orientation).

[0092] Base station 105 or UE 115 may use beamsweeping techniques as part of beamforming operations. For example, base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) for beamforming operations to facilitate directional communication with UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by base station 105 in different directions. For example, base station 105 may transmit signals based on different beamforming weight sets associated with different transmission directions. Transmissions in different beam directions may be used (e.g., by the transmitting device (such as base station 105) or the receiving device (such as UE 115)) to identify the beam direction that base station 105 uses for later transmission or reception.

[0093] Some signals (such as data signals associated with a specific receiving device) may be transmitted by base station 105 in a single beam direction (e.g., the direction associated with the receiving device (such as UE 115)). In some examples, the beam direction associated with transmission along a single beam direction may be determined based on the signals transmitted in one or more beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions and may report to base station 105 an indication of the signals received by UE 115 with the highest signal quality or other acceptable signal quality.

[0094] In some examples, transmissions performed by a device (e.g., by base station 105 or UE 115) may be executed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate combined beams for transmission (e.g., from base station 105 to UE 115). UE 115 may report feedback indicating precoding weights for one or more beam directions, and this feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. Base station 105 may transmit reference signals that may be precoded or unprecoded (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)). UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., multi-panel type codebook, linear combination type codebook, port selection type codebook). Although these techniques are described with reference to signals transmitted by base station 105 in one or more directions, UE 115 may use similar techniques to transmit signals multiple times in different directions (e.g., to identify the beam direction used by UE 115 for subsequent transmission or reception) or to transmit signals in a single direction (e.g., to transmit data to a receiving device).

[0095] A receiver device (e.g., UE 115) may attempt multiple receive configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from base station 105. For example, the receiver device may attempt multiple receive directions by: receiving via different antenna subarrays; processing received signals according to different antenna subarrays; receiving according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of the antenna array (e.g., different directional listening weight sets); or processing received signals according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of the antenna array, any of which may be referred to as "listening" according to different receive configurations or receive directions. In some examples, the receiver device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receive configuration may be aligned on a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0096] Wireless communication system 100 can be a packet-based network operating according to a layered protocol stack. In the user plane, communication at the bearer or Packet Data Convergence Protocol (PDCP) layer can be IP-based. The Radio Link Control (RLC) layer performs packet segmentation and reassembly for communication on logical channels. The Media Access Control (MAC) layer performs priority handling and multiplexing of logical channels into transport channels. The MAC layer can also use error detection, error correction, or both to support MAC layer retransmissions to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer can provide the establishment, configuration, and maintenance of RRC connections between UE 115 and base station 105 or core network 130 supporting user plane data radio bearers. At the physical layer, transport channels can be mapped to physical channels.

[0097] UE 115 and base station 105 can support data retransmission to increase the likelihood of successful data reception. Hybrid Automatic Repeat Request (HARQ) feedback is a technique used to increase the likelihood of correctly receiving data on communication link 125. HARQ may include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), forward error correction (FEC), and retransmission (e.g., Automatic Repeat Request (ARQ)). HARQ can improve MAC layer throughput in poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, the device may support simultaneous time-slot HARQ feedback, where the device can provide HARQ feedback in a specific time slot for data received in previous symbols within that time slot. In other cases, the device may provide HARQ feedback in subsequent time slots or according to some other time interval.

[0098] In wireless communication system 100, one or more UEs 115 and base station 105 can communicate in an ultra-wide bandwidth (e.g., a 14 GHz, 25 GHz, or a bandwidth greater than 3 GHz). However, UE 115 can be configured (e.g., via hardware / antenna configuration) to operate optimally at a subset of frequencies within the ultra-wide bandwidth, and may suffer degraded performance when communicating at other frequencies. UE 115 can thus identify one or more default operating frequencies for communication within that bandwidth and can transmit an indication of such one or more default operating frequencies to base station 105 or other devices in wireless communication system 100. This indication can be transmitted via RRC signaling, control signaling, etc. Base station 105 can configure one or more communication parameters based on the default operating frequencies, and UE 115 and base station 105 can communicate over the ultra-wide bandwidth based on the default operating frequencies and the configured communication parameters.

[0099] In some examples, UE 115 may receive system information (e.g., SIB) from base station 105. This system information includes parameters (e.g., areaScopeFrequency) indicating a mapping for a set including one or more cells. These cells may be geographically located near UE 115, for example, and each cell may have at least one antenna array configuration that is the same as (or within the threshold antenna element spacing) the antenna array configuration of UE 115. That is, the parameter may indicate nearby cells that may have a default operating frequency similar to UE 115 (e.g., because the default operating frequency is based on the antenna array configuration). UE 115 may identify and store the system information. Upon connecting to a cell, UE 115 may receive the system information from that cell and may compare the received system information with the stored system information. UE 115 may then communicate with other radio devices in that cell based on this comparison. For example, if the received system information is the same as the stored system information, other wireless devices in the cell can operate on a default operating frequency similar to the default operating frequency of UE 115.

[0100] Figure 2 Examples of wireless communication system 200 supporting techniques for declaring a default operating frequency according to various aspects of this disclosure are described. In some examples, wireless communication system 200 may implement aspects of wireless communication system 100. For example, wireless communication system 200 may include UE 115-a and base station 105-a, which may respectively refer to Figure 1Examples of UE 115 and base station 105 described herein. It should be understood that references to specific wireless devices (e.g., UE or base station) are provided for illustrative purposes, and different wireless devices not specifically mentioned herein may be used interchangeably with those described herein. Similarly, in some cases, the operations described to be performed by the UE may be performed by the base station, and vice versa.

[0101] Base station 105-a can communicate with UE 115-a via downlink communication link 205 and uplink communication link 210. In some examples, base station 105-a and UE 115-a can communicate over ultra-wide bandwidth (e.g., 14 GHz, 25 GHz). Base station 105-a and UE 115-a can each identify one or more default operating frequencies 215-a and 215-b for communication over the ultra-wide bandwidth. The default operating frequency 215 can be predetermined by the hardware configuration of the corresponding device. For example, UE 115-a may include hardware configured to perform beamforming with a finite number of RF chains on an antenna array. The antenna array may include a fixed inter-electrode spacing for operation at the default operating frequency 215-b (e.g., 63 GHz).

[0102] UE 115-a may transmit indications of one or more default operating frequencies 215-b via uplink communication link 210. Additionally or alternatively, base station 105-a may transmit indications of one or more default operating frequencies 215-a of base station 105-a via communication link 205. Default operating frequencies may be indicated via capability signaling (e.g., via RRC signaling). In other examples, default operating frequencies may be dynamically indicated (e.g., using DCI, SCI, etc.), based on interference variations measured at the default operating frequency. As an example, communication performance at a first default operating frequency may change (e.g., degrade), and UE 115-a or base station 105-a may select different second default operating frequencies for communication, wherein the second default operating frequency can be dynamically signaled between devices. Base station 105-a may identify the antenna array configuration of UE 115-a or one or more carrier frequencies corresponding to the analog beamforming codebook of UE 115-a based on the default operating frequency 215-b.

[0103] UE 115-a, base station 105-a, or both may adjust communication parameters based on a default operating frequency 215 (e.g., for communication on communication links 205 and 210). As an example, base station 105-a may configure, adjust, or modify communication parameters based on a default operating frequency 215-b to provide optimal performance for both UE 115-a and base station 105-a. That is, transmissions to / from UE 115-a may meet a predetermined performance threshold at the default operating frequency 215-b, but may suffer array gain and / or beamforming losses (e.g., due to beam shape distortion) at other frequencies within that bandwidth; accordingly, base station 105-a may select communication parameters that avoid such losses while maintaining performance at base station 105-a. For example, base station 105-a may select a frequency band (e.g., RF band) or channel that is relatively close (e.g., in the frequency domain) or includes the default operating frequency 215-b for communication. In other examples, base station 105-a and UE 115-a may determine that default operating frequencies 215-a and 215-b satisfy a threshold difference (e.g., a predetermined threshold difference) and may choose to communicate in a third default operating frequency (e.g., different from default operating frequencies 215-a and 215-b). In other words, if the default operating frequencies are different from each other (e.g., based on a predetermined threshold), a different alternative operating frequency may be selected to achieve communication performance between the devices (e.g., based on a signal strength threshold). Other communication parameters may include, but are not limited to, beamforming parameters of an analog beamforming codebook associated with the antenna array of UE 115-a. In any case, base station 105-a and UE 115-a may communicate over an ultra-wide bandwidth according to the default operating frequency 215.

[0104] In some cases, the default operating frequency 215 can be dynamically indicated and can be changed or updated based on communication performance. For example, the default operating frequency 215-b can indicate a performance metric for a set of frequencies on that bandwidth, and base station 105-a can estimate the simulated beamforming performance associated with communication in the corresponding set of frequencies. Base station 105-a can then update or adjust communication parameters based on the estimated beamforming performance. As another example, UE 115-a and base station 105-a can operate within an ultra-wide bandwidth 2 GHz band (e.g., 63 GHz–65 GHz) based on a first default operating frequency 215. Performance within this 2 GHz band may degrade over time or may fail to meet performance thresholds. Accordingly, base station 105-a and / or UE 115-a can transmit an indication of a second default operating frequency 215 and can adjust communication parameters accordingly (e.g., switching to a different 2 GHz band, such as 57 GHz–59 GHz). In some cases, the second default operating frequency 215 may be a default operating frequency in a set of default operating frequencies. Additionally or alternatively, the indication of the default operating frequency 215 may include an upper frequency boundary and a lower frequency boundary such that the operating frequencies within the boundaries (e.g., reaching and / or including the boundaries) meet a predetermined performance threshold (e.g., a predetermined signal strength threshold), and the base station 105-a and the UE 115-a may communicate on one or more frequencies within the frequency boundaries.

[0105] In some examples, UE 115-a or base station 105-a may receive system information (e.g., a System Information Block (SIB)) that includes parameters (e.g., an areaScopeFrequency parameter, which may be handled similarly to other SIB parameters, such as areaScope parameters or other parameters) indicating a mapping for a set of cells including one or more cells, wherein each cell in the set of cells may operate using the same antenna array configuration as the device receiving the system information. For example, UE 115-a may receive system information including this parameter from base station 105-a and may store the system information. UE 115-a may connect to cells in the set of cells and may receive second system information from those cells. UE 115-a may compare the stored system information with the system information received from the cells and may communicate with other wireless devices associated with the cells based on this comparison. For example, UE 115-a may determine that the stored system information matches the system information received from the cells. Therefore, other wireless devices associated with the cell (e.g., including the base station providing the cell) can operate using an antenna array configuration similar to that of UE 115-a, and thus can operate using a default operating frequency similar to the default operating frequency 215-b. UE 115-a is aware of compatibility with other wireless devices in the cell and can communicate via the same or similar default operating frequencies.

[0106] Figure 3 Examples of process flow 300 supporting techniques for declaring a default operating frequency according to various aspects of this disclosure are explained. In some examples, process flow 300 may implement aspects of wireless communication systems 100 and 200. For example, process flow 300 includes UE 105-b and base station 115-b, which may each be a reference Figure 1 and Figure 2 Example of the corresponding device described. Process flow 300 can illustrate an example of how base station 105-b and UE 115-b determine and concurrently signal notifications of one or more default operating frequencies to be used for communication between UE 115-b and base station 105-b.

[0107] In the following description of process flow 300, operations between UE 115-b and base station 105-b may be transmitted in a different order than shown, or operations performed by base station 105-b and UE 115-b may be performed in a different order or at different times. Some operations may also be excluded from process flow 300, or other operations may be added to process flow 300. It should be understood that although base station 105-b and UE 115-b are shown to perform several operations of process flow 300, any wireless device (e.g., UE, CPE, base station, IAB node, repeater, or sidelink node, etc.) may perform the operations shown.

[0108] In section 305, UE 115-b may identify a default operating frequency for communication over the bandwidth. This default operating frequency may be specific to UE 115-b and may be predetermined by the antenna array configuration of UE 115-b (e.g., the number of RF chains). In some cases, the default operating frequency may indicate the antenna array configuration of UE 115-b. The antenna array configuration may include the inter-electrode spacing of an antenna array with uniformly spaced antenna elements or non-uniformly spaced antenna elements. In some examples, the default operating frequency may indicate a performance metric for the set of frequencies over that bandwidth.

[0109] At 310, UE 115-b may transmit a message to base station 105-b including an indication of the default operating frequency. In some cases, UE 115-b may identify (e.g., at 305) and transmit indications for multiple default operating frequencies. This message may be a capability message (e.g., an RRC message), control information, etc. In cases where the default operating frequency includes a performance metric for the set of frequencies on that bandwidth, base station 105-b may estimate the simulated beamforming performance of that set of frequencies.

[0110] In 315, base station 105-b may optionally transmit instructions regarding system information to UE 115-b. This system information may include parameters indicating a mapping for a set comprising one or more cells that can operate using at least one antenna array configuration identical to that of UE 115-b. UE 115-b may store this system information (including the parameters).

[0111] At 320, UE 115-b can analyze the stored system information. For example, UE 115-b can compare the stored system information with second system information received from cells in the set including one or more cells, and UE 115-b can determine the default operating frequency that can be used in that cell.

[0112] At 325, base station 105-b may optionally transmit a message including an indication of its default operating frequency. The default operating frequency of base station 105-b may be determined by: the antenna configuration of base station 105-b, frequency bands from a set of frequency bands, channels from a set of channels, one or more carrier frequencies associated with the analog beamforming codebook of base station 105-b, or some combination thereof. UE 115-b may receive this indication and determine the default operating frequency of base station 105-b.

[0113] In 330 and 335, UE 115-b and base station 105-b can each determine (e.g., UE 115-b) a first default operating frequency and (e.g., base station 105-b) a second default operating frequency that satisfy a threshold difference. That is, the default operating frequency of UE 115-b may differ from the default operating frequency of base station 105-b, such that (e.g., in the frequency domain) the difference may not provide efficient communication.

[0114] Thus, at 340 and 345, UE 115-b and base station 105-b can each optionally select a third default operating frequency (e.g., different from the first and second default operating frequencies) based on the threshold differences determined at 330 and 335. For example, at 340, UE 115-b can select a third default operating frequency different from the first default operating frequency, and at 345, base station 105-b can select a third default operating frequency different from the second default operating frequency.

[0115] At 350 and 355, UE 115-b and base station 105-b may each identify one or more default operating frequency boundaries. For example, at 350, UE 115-b may identify a first operating frequency boundary (e.g., an upper frequency boundary) and a second operating frequency boundary (e.g., a lower frequency boundary) of the default operating frequency. In some examples, the upper and lower frequency boundaries may be indicated by the respective device (e.g., at 310 or 325) as part of a capability message or as part of DCI, SCI, or other signaling. The operating frequencies within the first and second operating frequency boundaries (which may include these frequency boundaries) provide beamforming performance that meets a threshold. This threshold may be a performance threshold, which may be based on a signal strength threshold for communication on these operating frequencies. In some cases, UE 115-b may include the indication of the first and second operating frequency boundaries together with a default operating frequency indication transmitted at 310. In such cases, at 355, base station 105-b may identify the first and second operating frequency boundaries of UE 115-b's default operating frequency based on this indication.

[0116] At 360 and 365, UE 115-b and base station 105-b can each select communication parameters based on the default operating frequency of UE 115-b, base station 105-b, or both. For example, at 360, UE 115-b can select beamforming parameters of an analog beamforming codebook associated with UE 115-b's antenna array. Additionally or alternatively, UE 115-b can select a frequency band, a channel, or both. At 365, base station 105-b can identify the antenna configuration of UE 115-b, one or more carrier frequencies or other analog beamforming parameters corresponding to UE 115-b's analog beamforming codebook, a frequency band from a set of frequency bands, a channel from a set of channels, or some combination thereof, and can select one or more communication parameters accordingly.

[0117] At 370, base station 105-b and UE 115-b may communicate based on the default operating frequency indicated at 310. In some cases, the communication may also be based on a comparison of system information at 320, the one or more default operating frequencies indicated at 325, a threshold difference determined at 330 or 335, a third default operating frequency determined at 340 or 345, a frequency boundary identified at 350 or 355, communication parameters determined at 360 or 365, or some combination thereof.

[0118] Figure 4 A block diagram 400 is shown of a device 405 supporting techniques for declaring a default operating frequency according to various aspects of this disclosure. Device 405 may be an example of a UE 115 or base station 105 as described herein. In other examples, device 405 may be an example of a CPE, IAB node, repeater, sidelink node, or other device in a wireless network as described herein. Device 405 may include a receiver 410, a communications manager 415, and a transmitter 420. Device 405 may also include one or more processors, memory coupled to the one or more processors, and instructions stored in the memory that can be executed by the one or more processors to enable the one or more processors to perform the frequency declaration features discussed herein. Each of these components may be in communication with each other (e.g., via one or more buses).

[0119] Receiver 410 can 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 techniques used to declare default operating frequencies). This information can be transmitted to other components of device 405. Receiver 410 can be a reference... Figure 7 and 8 Examples of various aspects of the transceiver 720 or 820 are described. Receiver 410 may utilize a single antenna or an array of antennas.

[0120] The communication manager 415 may: identify one or more default operating frequencies for communication over the bandwidth, each of the one or more default operating frequencies being predefined by the antenna array configuration of the first wireless device; transmit a message to the second wireless device including an indication of the one or more default operating frequencies of the first wireless device; and communicate with the second wireless device over the bandwidth based on the one or more default operating frequencies.

[0121] Communication manager 415 may also: receive from the second wireless device a message including an indication of one or more default operating frequencies of the second wireless device for communication over the bandwidth, the one or more default operating frequencies being configured based on the antenna array of the second wireless device; configure one or more communication parameters based on one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device; and communicate with the second wireless device over the bandwidth based on the one or more communication parameters. Communication manager 415 may be an example of aspects of communication managers 710 or 810 as described herein.

[0122] The communication manager 415 or its sub-components may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functionality of the communication manager 415 or its sub-components may be performed by a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), 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 this disclosure.

[0123] The communication manager 415 or its subcomponents may be physically located at various locations, including being distributed such that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of this disclosure, the communication manager 415 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of this disclosure, the communication manager 415 or its subcomponents may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or combinations thereof.

[0124] By including or configuring a communication manager 415 according to the examples described herein, device 405 (e.g., a processor that controls or otherwise couples to receiver 415, transmitter 420, communication manager 415, or a combination thereof) can support techniques for communicating with another wireless device based on a default operating frequency, which can reduce gain and beamforming loss at device 405. For example, device 405 and / or the other device can adjust one or more communication parameters based on a corresponding indication to the default operating frequency, thereby reducing beamforming loss, beamform distortion, and array gain degradation at device 405. Additionally, reducing such losses at device 405 can improve the efficiency and reliability of communication between device 405 and the other device.

[0125] Transmitter 420 can transmit signals generated by other components of device 405. In some examples, transmitter 420 may coexist with receiver 410 in a transceiver module. For example, transmitter 420 may be a reference... Figure 7 and 8 Examples of various aspects of the transceiver 720 or 820 described. Transmitter 420 may utilize a single antenna or an array of antennas.

[0126] Figure 5 A block diagram 500 of a device 505 supporting techniques for declaring a default operating frequency according to various aspects of this disclosure is shown. Device 505 may be an example of aspects of device 405, UE 115, or base station 105 as described herein. In other examples, device 505 may be an example of aspects of a CPE, IAB node, repeater, sidelink node, or other device in a wireless network as described herein. Device 505 may include a receiver 510, a communications manager 515, and a transmitter 540. Device 505 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0127] Receiver 510 can 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 techniques used to declare default operating frequencies). This information can be transmitted to other components of device 505. Receiver 510 can be a reference... Figure 7 and 8 Examples of various aspects of the transceiver 720 or 820 are described. Receiver 510 may utilize a single antenna or an array of antennas.

[0128] Communication manager 515 may be an example of aspects of communication manager 415 as described herein. Communication manager 515 may include operating frequency manager 520, message transceiver component 525, communication component 530, and parameter component 535. Communication manager 515 may be an example of aspects of communication manager 710 or 810 as described herein.

[0129] The operating frequency manager 520 can: identify one or more default operating frequencies for communication over a bandwidth by a first wireless device, each of the one or more default operating frequencies being predefined by the antenna array configuration of the first wireless device.

[0130] The message transceiver component 525 can transmit to the second wireless device a message including an indication of one or more default operating frequencies of the first wireless device. The message transceiver component 525 can also receive from the second wireless device a message including an indication of one or more default operating frequencies of the second wireless device, for communication over bandwidth, wherein the one or more default operating frequencies are based on the antenna array configuration of the second wireless device.

[0131] The communication component 530 can communicate with a second wireless device on the bandwidth based on one or more default operating frequencies.

[0132] The parameter component 535 can configure one or more communication parameters based on one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device.

[0133] The communication component 530 can communicate with the second wireless device over the bandwidth based on one or more communication parameters.

[0134] Transmitter 540 can transmit signals generated by other components of device 505. In some examples, transmitter 540 may coexist with receiver 510 in a transceiver module. For example, transmitter 540 may be a reference... Figure 7 and 8 Examples of various aspects of the transceiver 720 or 820 are described. The transmitter 540 may utilize a single antenna or an array of antennas.

[0135] In some cases, the operating frequency manager 520, message transceiver component 525, communication component 530, and parameter component 535 may each be a processor (e.g., a transceiver processor, a radio processor, a transmitter processor, or a receiver processor) or at least a part thereof. The processor may be coupled to memory and execute instructions stored in that memory that enable the processor to perform or facilitate the features of the operating frequency manager 520, message transceiver component 525, communication component 530, and parameter component 535 as discussed herein. The transceiver processor may coexist with and / or communicate with the transceiver of the device (e.g., instruct the operation of the transceiver). The radio processor may coexist with and / or communicate with the radio of the device (e.g., NR radio, LTE radio, Wi-Fi radio) (e.g., instruct the operation of the radio). The transmitter processor may coexist with and / or communicate with the transmitter of the device (e.g., instruct the operation of the transmitter). The receiver processor may coexist with and / or communicate with the receiver of the device (e.g., instruct the operation of the receiver).

[0136] Figure 6 A block diagram 600 is shown of a communication manager 605 supporting techniques for declaring a default operating frequency according to various aspects of this disclosure. The communication manager 605 may be an example of aspects of the communication manager 415, communication manager 515, or communication manager 710 described herein. The communication manager 605 may include an operating frequency manager 610, a message transceiver component 615, a communication component 620, a system information manager 625, a parameter component 630, a boundary component 635, a capability manager 640, a control information manager 645, an antenna array manager 650, and a beamforming manager 655. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0137] The operating frequency manager 610 can: identify one or more default operating frequencies for communication over a bandwidth by a first wireless device, each of the one or more default operating frequencies being predefined by the antenna array configuration of the first wireless device.

[0138] In some examples, the operating frequency manager 610 may determine one or more default operating frequencies of the second wireless device based on a second message, wherein the one or more default operating frequencies of the second wireless device may be determined by at least the following: the antenna configuration of the second wireless device, or one or more carrier frequencies associated with the analog beamforming codebook of the second wireless device, or frequency bands from a set of frequency bands, or channels from a set of channels, or any combination thereof.

[0139] In some examples, the operating frequency manager 610 may determine that a first default operating frequency of the first wireless device and a second default operating frequency of the second wireless device satisfy a predetermined threshold difference. In some cases, the operating frequency manager 610 may select a third default operating frequency for the first wireless device based on this determination, the second default operating frequency being different from the first default operating frequency, wherein communication with the second wireless device on this bandwidth is based on the third default operating frequency.

[0140] In some examples, the operating frequency manager 610 may determine that a first default operating frequency of the first wireless device and a second default operating frequency of the second wireless device satisfy a predetermined threshold difference. In some aspects, the operating frequency manager 610 may select a third default operating frequency of the first wireless device based on this determination, the second default operating frequency being different from the first default operating frequency, wherein communication with the second wireless device within this bandwidth is based on the third default operating frequency.

[0141] In some cases, the antenna array configuration includes the number of RF chains associated with the antenna array of the first wireless device. In some examples, the one or more default operating frequencies are specific to the first wireless device. In some cases, the first wireless device or the second wireless device, or both, include user equipment, or CPE, or base station, or IAB node, or wireless repeater, or sidelink node.

[0142] In some cases, the one or more default operating frequencies of the second wireless device indicate the antenna array configuration of the second wireless device, which includes the inter-antenna spacing of an antenna array having uniformly spaced antenna elements or non-uniformly spaced antenna elements.

[0143] The message transceiver component 615 can transmit a message to a second wireless device including an indication of one or more default operating frequencies of the first wireless device. In some examples, the message transceiver component 615 can receive from the second wireless device a message including an indication of one or more default operating frequencies of the second wireless device, the one or more default operating frequencies for communication over bandwidth being based on the antenna array configuration of the second wireless device. In some examples, the message transceiver component 615 can receive a second message from the second wireless device, the second message including an indication of one or more default operating frequencies of the second wireless device.

[0144] In some cases, the one or more default operating frequencies of the first wireless device indicate a performance metric for the set of frequencies over that bandwidth. In some aspects, the one or more default operating frequencies of the first wireless device indicate the antenna array configuration of the first wireless device, which includes the inter-antenna spacing of an antenna array having uniformly spaced antenna elements or non-uniformly spaced antenna elements.

[0145] Communication component 620 may communicate with a second wireless device over the bandwidth based on one or more default operating frequencies. In some examples, communication component 620 may communicate with the second wireless device over the bandwidth based on one or more communication parameters. In some cases, communication component 620 may use one or more default operating frequencies based on the comparison to communicate with one or more wireless devices associated with the first cell.

[0146] In some examples, the communication component 620 may select at least the frequency band, or the channel, or any combination thereof for communicating with the second wireless device based on the one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device, wherein communication with the second wireless device on that bandwidth is based on the selected frequency band, or channel, or any combination thereof.

[0147] In some examples, the communication component 620 may identify at least a frequency band from the set of frequency bands, or a channel from the set of channels, or any combination thereof, based on one or more default operating frequencies.

[0148] Parameter component 630 can configure one or more communication parameters based on one or more default operating frequencies of the first wireless device and the same one or more default operating frequencies of the second wireless device. In some examples, parameter component 630 can select one or more communication parameters based on the one or more default operating frequencies of the first and second wireless devices, wherein communication with the second wireless device on that bandwidth is based on the selected one or more communication parameters. In some cases, parameter component 630 can select the one or more communication parameters based on the antenna array configuration of the second wireless device, the one or more carrier frequencies, or any combination thereof.

[0149] In some examples, parameter component 630 may select one or more communication parameters based on the frequency band, the channel, or any combination thereof. In some cases, the one or more communication parameters include beamforming parameters of an analog beamforming codebook associated with the antenna array of the first wireless device. In some cases, the one or more communication parameters include analog beamforming parameters of an analog beamforming codebook associated with the antenna array of the second wireless device.

[0150] System information manager 625 may receive first system information including parameters indicating a mapping for a set comprising one or more cells, wherein each cell in the set of one or more cells operates using at least one antenna array configuration identical to the antenna array configuration of the first wireless device. In some examples, system information manager 625 may store the first system information including the parameters. In some examples, system information manager 625 may compare the stored first system information with second system information received from the first cell in the set of one or more cells.

[0151] In some examples, the system information manager 625 may transmit system information including parameters indicating a mapping for a set comprising one or more cells, wherein each cell in the set comprising one or more cells operates using at least one antenna array configuration identical to the antenna array configuration of the second wireless device.

[0152] Boundary component 635 can identify a first operating frequency boundary and a second operating frequency boundary for each of the one or more default operating frequencies, wherein the first operating frequency boundary is different from the second operating frequency boundary, and wherein the indication for the one or more default operating frequencies includes an indication of at least the first operating frequency boundary, or the second operating frequency boundary, or any combination thereof.

[0153] In some examples, boundary component 635 may identify a first operating frequency boundary and a second operating frequency boundary of the one or more default operating frequencies of the second wireless device based on the indication of the one or more default operating frequencies, wherein the first operating frequency boundary is different from the second operating frequency boundary, and communication with the second wireless device on that bandwidth is based on the first operating frequency boundary, or the second operating frequency boundary, or any combination thereof.

[0154] In some cases, the first operating frequency boundary includes an upper frequency boundary and the second operating frequency boundary includes a lower frequency boundary, wherein one or more operating frequencies within the upper and lower frequency boundaries provide beamforming performance that satisfies a performance threshold. In some examples, the performance threshold may be based on a signal strength threshold for communication on the one or more operating frequencies.

[0155] Capability manager 640 can transmit capability messages to a second wireless device, including an indication of one or more default operating frequencies of the first wireless device. In some examples, capability manager 640 can receive capability messages from the second wireless device, including an indication of one or more default operating frequencies of the first wireless device.

[0156] The control information manager 645 can transmit control information, including an indication of one or more default operating frequencies of the first wireless device, to the second wireless device. In some examples, the control information manager 645 can receive control information, including an indication of one or more default operating frequencies of the first wireless device, from the second wireless device.

[0157] The antenna array manager 650 can identify at least the antenna array configuration of the second wireless device, or one or more carrier frequencies corresponding to the analog beamforming codebook of the second wireless device, or any combination thereof, based on the one or more default operating frequencies.

[0158] The beamforming manager 655 can estimate the simulated beamforming performance of a set of frequencies over that bandwidth, wherein the one or more default operating frequencies of the second wireless device indicate a performance metric for that set of frequencies.

[0159] In some cases, the operating frequency manager 610, message transceiver component 615, communication component 620, system information manager 625, parameter component 630, boundary component 635, capability component 640, control information manager 645, antenna array manager 650, and beamforming manager 655 may each be a processor (e.g., a transceiver processor, a radio processor, a transmitter processor, or a receiver processor) or a part thereof. The processor may be coupled to memory and execute instructions stored in that memory, which enable the processor to perform or facilitate the features of the operating frequency manager 610, message transceiver component 615, communication component 620, system information manager 625, parameter component 630, boundary component 635, capability component 640, control information manager 645, antenna array manager 650, and beamforming manager 655 discussed herein.

[0160] Figure 7 A diagram of a system 700 including a device 705 supporting techniques for declaring a default operating frequency, according to various aspects of this disclosure, is shown. Device 705 may be an example of device 405, device 505, or UE 115 as described herein, or a component including the aforementioned devices. In other examples, device 705 may be an example of a CPE, or IAB node, or repeater, or sidelink node, or aspect of another device in a wireless network as described herein. Device 705 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including a communication manager 710, transceiver 720, antenna 725, memory 730, processor 740, and I / O controller 750. These components may be in electronic communication via one or more buses (e.g., bus 755).

[0161] The communication manager 710 may: identify one or more default operating frequencies for communication over a bandwidth by a first wireless device, each of the one or more default operating frequencies being predefined by the antenna array configuration of the first wireless device; transmit a message to a second wireless device including an indication of the one or more default operating frequencies of the first wireless device; and communicate with the second wireless device over the bandwidth based on the one or more default operating frequencies. The communication manager 710 may also: receive from the second wireless device a message including an indication of one or more default operating frequencies of the second wireless device, the one or more default operating frequencies for communication over the bandwidth being predefined by the antenna array configuration of the second wireless device; configure one or more communication parameters based on the one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device; and communicate with the second wireless device over the bandwidth based on the one or more communication parameters.

[0162] By including or configuring a communication manager 715 according to the example described herein, device 705 can support techniques for communicating with another wireless device based on a default operating frequency. This improves communication performance by reducing beamforming loss, beam shape distortion, and array gain degradation at device 705. Improving performance at device 705 can further increase system throughput and reliability because the likelihood of message failures and retransmissions is reduced. Additionally, reducing such losses at device 705 and other devices communicating with device 705 can improve coordination between these devices, thereby enhancing communication efficiency.

[0163] Transceiver 720 can communicate bidirectionally via one or more antennas, wired or wireless links, as described herein. For example, transceiver 720 may represent a wireless transceiver and be able to communicate bidirectionally with another wireless transceiver. Transceiver 720 may also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and to demodulate packets received from the antenna. In some cases, the wireless device may include a single antenna 725. However, in some cases, the device may have more than one antenna 725, which may be able to transmit or receive multiple wireless transmissions concurrently.

[0164] Memory 730 may include random access memory (RAM), read-only memory (ROM), or a combination thereof. Memory 730 may store computer-readable code 735 including instructions that, when executed by a processor (e.g., processor 740), cause the device to perform the various functions described herein. In some cases, memory 730 may particularly include a basic input / output system (BIOS) that controls basic hardware or software operation, such as interaction with peripheral components or devices.

[0165] Processor 740 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 740 may be configured to use a memory controller to operate a memory array. In other cases, the memory controller may be integrated into processor 740. Processor 740 may be configured to execute computer-readable instructions stored in memory (e.g., memory 730) to cause device 705 to perform various functions (e.g., supporting various functions or tasks for declaring operating frequencies).

[0166] The I / O controller 750 manages the input and output signals of device 705. The I / O controller 750 can also manage peripheral devices not integrated into device 705. In some cases, the I / O controller 750 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 750 may utilize an operating system, such as... Or another known operating system. In other cases, the I / O controller 750 may represent or interact with a modem, keyboard, mouse, touchscreen, or similar device. In some cases, the I / O controller 750 may be implemented as part of a processor. In some cases, a user may interact with the device 705 via the I / O controller 750 or via hardware components controlled by the I / O controller 750.

[0167] Code 735 may include instructions for implementing various aspects of this disclosure, including instructions for supporting wireless communication. Code 735 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, code 735 may not be directly executed by processor 740, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0168] Figure 8A diagram of a system 800 including a device 805 supporting techniques for declaring a default operating frequency is shown according to aspects of this disclosure. Device 805 may be an example of a component of device 405, device 505, or base station 105 as described herein, or may include such components. In other examples, device 805 may be an example of a CPE, or IAB node, or repeater, or sidelink node, or aspect of another device in a wireless network as described herein. Device 805 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including a communication manager 810, a network communication manager 815, a transceiver 820, an antenna 825, a memory 830, a processor 840, and an inter-site communication manager 845. These components may be in electronic communication via one or more buses (e.g., bus 855).

[0169] The communication manager 810 may: identify one or more default operating frequencies for communication over a bandwidth by a first wireless device, each of the one or more default operating frequencies being predefined by the antenna array configuration of the first wireless device; transmit a message to a second wireless device including an indication of the one or more default operating frequencies of the first wireless device; and communicate with the second wireless device over the bandwidth based on the one or more default operating frequencies. The communication manager 810 may also: receive from the second wireless device a message including an indication of one or more default operating frequencies of the second wireless device, the one or more default operating frequencies for communication over the bandwidth being predefined by the antenna array configuration of the second wireless device; configure one or more communication parameters based on the one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device; and communicate with the second wireless device over the bandwidth based on the one or more communication parameters.

[0170] The network communication manager 815 can manage communication with the core network (e.g., via one or more wired backhaul links). For example, the network communication manager 815 can manage the delivery of data communication by client devices (such as one or more UEs 115).

[0171] Transceiver 820 can communicate bidirectionally via one or more antennas, wired or wireless links, as described herein. For example, transceiver 820 may represent a wireless transceiver and be able to communicate bidirectionally with another wireless transceiver. Transceiver 820 may also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and to demodulate packets received from the antenna. In some cases, the wireless device may include a single antenna 825. However, in some cases, the device may have more than one antenna 825, which may be able to transmit or receive multiple wireless transmissions concurrently.

[0172] Memory 830 may include RAM, ROM, or a combination thereof. Memory 830 may store computer-readable code 835 including instructions that, when executed by a processor (e.g., processor 840), cause the device to perform the various functions described herein. In some cases, memory 830 may particularly include a BIOS that controls basic hardware or software operation, such as interaction with peripheral components or devices.

[0173] Processor 840 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 840 may be configured to use a memory controller to operate a memory array. In other cases, the memory controller may be integrated into processor 840. Processor 840 may be configured to execute computer-readable instructions stored in memory (e.g., memory 830) to cause device 805 to perform various functions (e.g., supporting various functions or tasks for declaring operating frequencies).

[0174] Inter-site communication manager 845 manages communication with other base stations 105 and may include a controller or scheduler for cooperating with other base stations 105 to control communication with UE 115. For example, inter-site communication manager 845 may coordinate the scheduling of transmissions to UE 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, inter-site communication manager 845 may provide an X2 interface within LTE / LTE-A wireless communication network technology to facilitate communication between the base stations 105.

[0175] Code 835 may include instructions for implementing various aspects of this disclosure, including instructions for supporting wireless communication. Code 835 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, code 835 may not be directly executed by processor 840, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0176] Figure 9 A flowchart illustrating a method 900 for declaring a default operating frequency, supporting various aspects of this disclosure, is shown. The operation of method 900 can be implemented by a wireless device, such as a UE 115, base station 105, CPE, IAB intersection, repeater, sidelink node, or another device or component thereof in a wireless network as described herein. For example, the operation of method 900 can be implemented by, as referred to... Figures 4 to 8The described communication manager is used to perform these functions. In some examples, the wireless device can execute a set of instructions to control the functional elements of the wireless device to perform the functions described herein. Additionally or alternatively, the UE or base station may use dedicated hardware to perform aspects of the functions described herein.

[0177] In 905, the wireless device may identify one or more default operating frequencies for communication over the bandwidth, each of which is predetermined by the antenna array configuration of the first wireless device. Operation of 905 may be performed according to the methods described herein. In some examples, aspects of the operation of 905 may be determined by reference to... Figures 4 to 8 The described operation is performed by the frequency manager.

[0178] At 910, the wireless device may transmit a message to the second wireless device including an indication of the one or more default operating frequencies of the first wireless device. The operation of 910 may be performed according to the methods described herein. In some examples, aspects of the operation of 910 may be determined by reference to... Figures 4 to 8 The described message sending and receiving components are used to perform this.

[0179] In 915, the wireless device can communicate with a second wireless device on the bandwidth based on one or more default operating frequencies. The operation of 915 can be performed according to the methods described herein. In some examples, aspects of the operation of 915 can be determined by referring to... Figures 4 to 8 The described communication components are used to perform this.

[0180] Figure 10 A flowchart illustrating a method 1000 for declaring a default operating frequency, supporting various aspects of this disclosure, is shown. The operation of method 1000 can be implemented by a wireless device, such as a UE 115, base station 105, CPE, IAB intersection, repeater, sidelink node, or another device or component thereof in a wireless network as described herein. For example, the operation of method 1000 can be implemented by, as referred to... Figures 4 to 8 The described communication manager is used to perform this. In some examples, the wireless device can execute a set of instructions to control the functional elements of the wireless device to perform the functions described herein. Additionally or alternatively, the wireless device may use dedicated hardware to perform aspects of the functions described herein.

[0181] In 1005, the wireless device may identify one or more default operating frequencies for communication over the bandwidth, each of which is predetermined by the antenna array configuration of the first wireless device. Operation of 1005 may be performed according to the methods described herein. In some examples, aspects of the operation of 1005 may be determined by reference to... Figures 4 to 8The described operation is performed by the frequency manager.

[0182] In step 1010, the wireless device may transmit a message to the second wireless device including an indication of the one or more default operating frequencies of the first wireless device. Operation of step 1010 may be performed according to the methods described herein. In some examples, aspects of the operation of step 1010 may be determined by reference to... Figures 4 to 8 The described message sending and receiving components are used to perform this.

[0183] In 1015, the wireless device can communicate with a second wireless device on the bandwidth based on one or more default operating frequencies. The operation of 1015 can be performed according to the methods described herein. In some examples, aspects of the operation of 1015 can be determined by referring to... Figures 4 to 8 The described communication components are used to perform this.

[0184] In 1020, the wireless device may receive first system information including parameters indicating a mapping for a set comprising one or more cells, wherein each cell in the set comprising one or more cells operates using at least one antenna array configuration identical to the antenna array configuration of the first wireless device. Operation of 1020 may be performed according to the methods described herein. In some examples, aspects of the operation of 1020 may be provided by reference to [reference needed]. Figures 4 to 8 The system information manager described is used to execute this.

[0185] In 1025, the wireless device may store first system information including this parameter. The operation of 1025 can be performed according to the methods described herein. In some examples, aspects of the operation of 1025 may be derived from, as referenced... Figures 4 to 8 The system information manager described is used to execute this.

[0186] In 1030, the wireless device may compare the stored first system information with second system information received from the first cell in the set comprising one or more cells. The operation of 1030 may be performed according to the methods described herein. In some examples, aspects of the operation of 1030 may be derived from, as referenced... Figures 4 to 8 The system information manager described is used to execute this.

[0187] In 1035, the wireless device may use one or more default operating frequencies based on the comparison to communicate with one or more wireless devices associated with the first cell. The operation of 1035 may be performed according to the methods described herein. In some examples, aspects of the operation of 1035 may be as described in reference... Figures 4 to 8 The described communication components are used to perform this.

[0188] Figure 11A flowchart illustrating a method 1100 for declaring a default operating frequency, supporting various aspects of this disclosure, is shown. Operation of method 1100 can be implemented by a wireless device, such as a UE 115, base station 105, CPE, IAB intersection, repeater, sidelink node, or another device or component thereof in a wireless network as described herein. For example, operation of method 1100 can be performed by, as referred to... Figures 4 to 8 The described communication manager is used to perform this. In some examples, the wireless device can execute a set of instructions to control the functional elements of the wireless device to perform the functions described herein. Additionally or alternatively, the wireless device may use dedicated hardware to perform aspects of the functions described herein.

[0189] At 1105, the wireless device may identify one or more default operating frequencies for communication over the bandwidth, each of which is predetermined by the antenna array configuration of the first wireless device. Operation of 1105 may be performed according to the methods described herein. In some examples, aspects of the operation of 1105 may be determined by reference to... Figures 4 to 8 The described operation is performed by the frequency manager.

[0190] At 1110, the wireless device may transmit a message to the second wireless device including an indication of the one or more default operating frequencies of the first wireless device. The operation of 1110 may be performed according to the methods described herein. In some examples, aspects of the operation of 1110 may be determined by reference to... Figures 4 to 8 The described message sending and receiving components are used to perform this.

[0191] In 1115, the wireless device can communicate with a second wireless device on the bandwidth based on one or more default operating frequencies. The operation of 1115 can be performed according to the methods described herein. In some examples, aspects of the operation of 1115 can be determined by referring to... Figures 4 to 8 The described communication components are used to perform this.

[0192] At 1120, the wireless device can receive a second message from the second wireless device, the second message including an indication of the one or more default operating frequencies of the second wireless device. Operation of 1120 can be performed according to the methods described herein. In some examples, aspects of the operation of 1120 can be determined by referring to... Figures 4 to 8 The described message sending and receiving components are used to perform this.

[0193] At 1125, the wireless device may determine the one or more default operating frequencies of the second wireless device based on the second message, wherein the one or more default operating frequencies of the second wireless device are determined by at least the following: the antenna configuration of the second wireless device, or one or more carrier frequencies associated with the analog beamforming codebook of the second wireless device, or frequency bands from a set of frequency bands, or channels from a set of channels, or any combination thereof. Operation of 1125 may be performed according to the methods described herein. In some examples, aspects of the operation of 1125 may be determined by, as referenced... Figures 4 to 8 The described operation is performed by the frequency manager.

[0194] Figure 12 A flowchart illustrating a method 1200 for declaring a default operating frequency, supporting various aspects of this disclosure, is shown. Operation of method 1200 can be implemented by a wireless device, such as a UE 115 in a wireless network as described herein, or a base station 105, or a CPE, or an IAB intersection, or a repeater, or a sidelink node, or another device, or a component thereof. For example, operation of method 1200 can be performed by, as described in reference... Figures 4 to 8 The described communication manager is used to perform this. In some examples, the wireless device can execute a set of instructions to control the functional elements of the wireless device to perform the functions described herein. Additionally or alternatively, the wireless device may use dedicated hardware to perform aspects of the functions described herein.

[0195] At 1205, the wireless device can receive from the second wireless device a message including an indication of one or more default operating frequencies for the second wireless device, wherein the one or more default operating frequencies for communication over the bandwidth are based on the antenna array configuration of the second wireless device. Operation of 1205 can be performed according to the methods described herein. In some examples, aspects of the operation of 1205 can be determined by reference to... Figures 4 to 8 The described message sending and receiving components are used to perform this.

[0196] In 1210, the wireless device can configure one or more communication parameters based on one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device. The operation of 1210 can be performed according to the methods described herein. In some examples, aspects of the operation of 1210 can be determined by referring to... Figures 4 to 8 The parameters described are used to execute the procedure.

[0197] In 1215, the wireless device can communicate with the second wireless device on the bandwidth based on one or more communication parameters. The operation of 1215 can be performed according to the methods described herein. In some examples, aspects of the operation of 1215 can be derived from, as referenced... Figures 4 to 8 The described communication components are used to perform this.

[0198] Figure 13 A flowchart illustrating a method 1300 for declaring a default operating frequency, supporting various aspects of this disclosure, is shown. Operation of method 1300 can be implemented by a wireless device, such as a UE 115, base station 105, CPE, IAB intersection, repeater, sidelink node, or another device or component thereof in a wireless network as described herein. For example, operation of method 1300 can be performed by, as referred to... Figures 4 to 8 The described communication manager is used to perform this. In some examples, the wireless device can execute a set of instructions to control the functional elements of the wireless device to perform the functions described herein. Additionally or alternatively, the wireless device may use dedicated hardware to perform aspects of the functions described herein.

[0199] At 1305, the wireless device can receive from the second wireless device a message including an indication of one or more default operating frequencies for the second wireless device, wherein the one or more default operating frequencies for communication over the bandwidth are based on the antenna array configuration of the second wireless device. Operation of 1305 can be performed according to the methods described herein. In some examples, aspects of the operation of 1305 can be determined by reference to... Figures 4 to 8 The described message sending and receiving components are used to perform this.

[0200] In 1310, the wireless device can configure one or more communication parameters based on one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device. Operation of 1310 can be performed according to the methods described herein. In some examples, aspects of the operation of 1310 can be determined by referring to... Figures 4 to 8 The parameters described are used to execute the procedure.

[0201] In 1315, the wireless device may transmit system information including parameters indicating a mapping for a set comprising one or more cells, wherein each cell in the set comprising one or more cells operates using at least one antenna array configuration identical to the antenna array configuration of the second wireless device. Operation of 1315 may be performed according to the methods described herein. In some examples, aspects of the operation of 1315 may be derived from, as referenced... Figures 4 to 8 The system information manager described is used to execute this.

[0202] In 1320, the wireless device can communicate with the second wireless device on the bandwidth based on one or more communication parameters. The operation of 1320 can be performed according to the methods described herein. In some examples, aspects of the operation of 1320 can be determined by referring to... Figures 4 to 8 The described communication components are used to perform this.

[0203] It should be noted that the methods described in this paper describe possible implementations, and the operations and steps can be rearranged or otherwise modified, and other implementations are also possible. Furthermore, aspects from two or more methods can be combined.

[0204] The following provides an overview of the various aspects of this disclosure:

[0205] Aspect 1: A method for wireless communication at a first wireless device, comprising: identifying by the first wireless device one or more default operating frequencies for communication over a bandwidth, each of the one or more default operating frequencies being predetermined by an antenna array configuration of the first wireless device; transmitting to a second wireless device a message including an indication of the one or more default operating frequencies of the first wireless device; and communicating with the second wireless device over the bandwidth based at least in part on the one or more default operating frequencies.

[0206] Aspect 2: The method of Aspect 1 further includes: receiving first system information, the first system information including parameters indicating a mapping for a set including one or more cells, wherein each cell in the set including one or more cells operates using at least one antenna array configuration identical to the antenna array configuration of the first wireless device; storing the first system information including the parameters; comparing the stored first system information with second system information received from the first cell in the set including one or more cells; and communicating with one or more wireless devices associated with the first cell using the one or more default operating frequencies, at least in part based on the comparison.

[0207] Aspect 3: The method of any of Aspects 1 and 2 further includes: receiving a second message from a second wireless device, the second message including an indication of one or more default operating frequencies of the second wireless device; and determining the one or more default operating frequencies of the second wireless device at least in part based on the second message, wherein the one or more default operating frequencies of the second wireless device are determined by at least the following: the antenna configuration of the second wireless device, or one or more carrier frequencies associated with the analog beamforming codebook of the second wireless device, or frequency bands from a set of frequency bands, or channels from a set of channels, or any combination thereof.

[0208] Aspect 4: The method of aspect 3 further includes: selecting one or more communication parameters based at least in part on the one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device, wherein communication with the second wireless device on the bandwidth is at least in part based on the selected one or more communication parameters.

[0209] Aspect 5: The method of aspect 4, wherein the one or more communication parameters include beamforming parameters of the analog beamforming codebook associated with the antenna array of the first wireless device.

[0210] Aspect 6: The method of any of Aspects 3 to 5 further includes: selecting at least the frequency band, or the channel, or any combination thereof for communication with the second wireless device based at least in part on the one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device, wherein communication with the second wireless device on the bandwidth is based at least in part on the selected frequency band, or the channel, or any combination thereof.

[0211] Aspect 7: The method of any of Aspects 3 to 6 further includes: determining that a first default operating frequency of the first wireless device and a second default operating frequency of the second wireless device satisfy a predetermined threshold difference; and selecting a third default operating frequency of the first wireless device, which is different from the first default operating frequency, based at least in part on the determination, wherein communication with the second wireless device on the bandwidth is based at least in part on the third default operating frequency.

[0212] Aspect 8: The method of any of Aspects 1 to 7, wherein identifying the one or more default operating frequencies includes: identifying a first operating frequency boundary and a second operating frequency boundary for each of the one or more default operating frequencies, the first operating frequency boundary being different from the second operating frequency boundary, wherein the indication of the one or more default operating frequencies includes an indication of at least the first operating frequency boundary, or the second operating frequency boundary, or any combination thereof.

[0213] Aspect 9: The method of aspect 8, wherein the first operating frequency boundary includes an upper frequency boundary and the second operating frequency boundary includes a lower frequency boundary, and one or more operating frequencies within the upper and lower frequency boundaries provide beamforming performance that satisfies a performance threshold, the performance threshold being at least partially based on a signal strength threshold for communication on the one or more operating frequencies.

[0214] Aspect 10: The method of any of Aspects 1 to 9, wherein transmitting a message including an indication of the one or more default operating frequencies of the first wireless device comprises: transmitting a capability message including an indication of the one or more default operating frequencies of the first wireless device to the second wireless device.

[0215] Aspect 11: The method of any of Aspects 1 to 10, wherein transmitting a message including an indication of the one or more default operating frequencies of the first wireless device includes: transmitting control information including an indication of the one or more default operating frequencies of the first wireless device to the second wireless device.

[0216] Aspect 12: The method of any of Aspects 1 to 11, wherein the one or more default operating frequencies of the first wireless device indicate a performance metric for the set of frequencies on the bandwidth.

[0217] Aspect 13: The method of any of Aspects 1 to 12, wherein the one or more default operating frequencies of the first wireless device indicate the antenna array configuration of the first wireless device, the antenna array configuration including the inter-antenna spacing of an antenna array having uniformly spaced antenna elements or non-uniformly spaced antenna elements.

[0218] Aspect 14: The method of any of Aspects 1 to 13, wherein the antenna array configuration includes a number of radio frequency chains associated with the antenna array of the first wireless device.

[0219] Aspect 15: The method of any of Aspects 1 to 14, wherein the one or more default operating frequencies are specific to the first wireless device.

[0220] Aspect 16: The method of any of Aspects 1 to 15, wherein the first wireless device or the second wireless device or both include user equipment, or client equipment, or base station, or integrated access and backhaul node, or wireless repeater, or sidelink node.

[0221] Aspect 17: A method for wireless communication at a first wireless device, comprising: receiving from a second wireless device a message including an indication of one or more default operating frequencies of the second wireless device, the one or more default operating frequencies for communication over a bandwidth being configured at least in part based on an antenna array of the second wireless device; configuring one or more communication parameters at least in part based on the one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device; and communicating with the second wireless device over the bandwidth at least in part based on the one or more communication parameters.

[0222] Aspect 18: The method of aspect 17 further includes: transmitting system information, the system information including parameters indicating a mapping for a set including one or more cellular cells, wherein each cellular cell in the set including one or more cellular cells operates using at least one antenna array configuration identical to the antenna array configuration of the second wireless device.

[0223] Aspect 19: The method of any of Aspects 17 to 18 further includes: identifying at least, in part, the antenna array configuration of the second wireless device, or one or more carrier frequencies corresponding to the analog beamforming codebook of the second wireless device, or any combination thereof, based at least partially on the one or more default operating frequencies; and selecting the one or more communication parameters based at least in part on the antenna array configuration of the second wireless device, the one or more carrier frequencies, or any combination thereof.

[0224] Aspect 20: The method of any of Aspects 17 to 19 further includes: identifying at least a frequency band from a set of frequency bands, or a channel from a set of channels, or any combination thereof, based at least in part on the one or more default operating frequencies; and selecting the one or more communication parameters based at least in part on the frequency band, or the channel, or any combination thereof.

[0225] Aspect 21: The method of any of Aspects 17 to 20 further includes: estimating the simulated beamforming performance of a set of frequencies over the bandwidth, wherein the one or more default operating frequencies of the second wireless device indicate a performance metric for the set of frequencies.

[0226] Aspect 22: The method of any of Aspects 17 to 21 further includes: determining that a first default operating frequency of the first wireless device and a second default operating frequency of the second wireless device satisfy a predetermined threshold difference; and selecting a third default operating frequency of the first wireless device, which is different from the first default operating frequency, based at least in part on the determination, wherein communication with the second wireless device within the bandwidth is based at least in part on the third default operating frequency.

[0227] Aspect 23: The method of any of Aspects 17 to 22 further includes: identifying a first operating frequency boundary and a second operating frequency boundary of the one or more default operating frequencies of the second wireless device according to the indication of the one or more default operating frequencies, the first operating frequency boundary being different from the second operating frequency boundary, wherein communication with the second wireless device on the bandwidth is at least partially based on the first operating frequency boundary, or the second operating frequency boundary, or any combination thereof.

[0228] Aspect 24: The method of aspect 23, wherein a first operating frequency boundary includes an upper frequency boundary and a second operating frequency boundary includes a lower frequency boundary, and one or more operating frequencies within the upper and lower frequency boundaries provide beamforming performance that satisfies a performance threshold, which is at least partially based on a signal strength threshold for communication on the one or more operating frequencies.

[0229] Aspect 25: The method of any of Aspects 17 to 24, wherein the one or more communication parameters include analog beamforming parameters of an analog beamforming codebook associated with the antenna array of the second wireless device.

[0230] Aspect 26: The method of any of Aspects 17 to 25, wherein receiving an indication of the one or more default operating frequencies of the second wireless device comprises: receiving from the second wireless device a capability message including an indication of the one or more default operating frequencies of the first wireless device.

[0231] Aspect 27: The method of any of Aspects 17 to 26, wherein receiving an indication of the one or more default operating frequencies of the second wireless device comprises: receiving control information from the second wireless device including an indication of the one or more default operating frequencies of the first wireless device.

[0232] Aspect 28: The method of any of Aspects 17 to 27, wherein the one or more default operating frequencies of the first wireless device indicate the antenna array configuration of the second wireless device, the antenna array configuration including the inter-antenna spacing of an antenna array having uniformly spaced antenna elements or non-uniformly spaced antenna elements.

[0233] Aspect 29: An apparatus for wireless communication at a first wireless device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method as described in any of Aspects 1 to 16.

[0234] Aspect 30: An apparatus for wireless communication at a first wireless device, comprising at least one means for performing the method as described in any of aspects 1 to 16.

[0235] Aspect 31: A non-transient computer-readable medium storing code for wireless communication at a first wireless device, the code including instructions executable by a processor to perform methods as described in any of Aspects 1 to 16.

[0236] Aspect 32: An apparatus for wireless communication at a first wireless device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method as described in any of Aspects 17 to 28.

[0237] Aspect 33: An apparatus for wireless communication at a first wireless device, comprising at least one means for performing the method as described in any of Aspects 17 to 28.

[0238] Aspect 34: A non-transient computer-readable medium storing code for wireless communication at a first wireless device, the code including instructions executable by a processor to perform methods as described in any of Aspects 17 to 28.

[0239] While aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for illustrative purposes, and the terms LTE, LTE-A, LTE-A Pro, or NR may be used in most of the description, the techniques described herein can also be applied to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques can be applied to a variety of other wireless communication systems, such as Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0240] The information and signals described herein can be represented using any of a wide variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or light particles, or any combination thereof.

[0241] The various illustrative boxes and components described herein can be implemented or executed using a general-purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but in alternatives, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors working in conjunction with a DSP core, or any other such configuration).

[0242] 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 or transmitted as one or more instructions or code on a computer-readable medium. Other examples and implementations fall within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Features implementing the functions may also be physically located in various locations, including being distributed such that different parts of the function are implemented at different physical locations.

[0243] Computer-readable media includes both non-transient computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one location to another. Non-transient storage media can be any available medium accessible to a general-purpose or special-purpose computer. By way of example and not limitation, non-transient computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other non-transient medium that can be used to carry or store desired program code in the form of instructions or data structures and is accessible to a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Similarly, any connection is also legitimately referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then such coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable media. As used in this article, disk and disc include CDs, laser discs, optical discs, DVDs, floppy disks, and Blu-ray discs, where disks often magnetically reproduce data while discs optically reproduce data using lasers. Combinations of these media are also included within the scope of computer-readable media.

[0244] As used herein (including in the claims), the word "or" in an enumeration of items (e.g., an enumeration of items accompanied by phrases such as "at least one of" or "one or more of") indicates an inclusive enumeration, such that an enumeration of at least one of, for example, A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Similarly, as used herein, the phrase "based on" should not be interpreted as referring to a closed set of conditions. For example, an example step described as "based on condition A" may be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0245] In the accompanying drawings, similar components or features may have the same reference numerals. Furthermore, components of the same type may be distinguished by a dash following the reference numeral and a second reference numeral used to differentiate between similar components. If only the first reference numeral is used in the description, the description may apply to any of the similar components having the same first reference numeral, regardless of the second reference numeral or other subsequent reference numerals.

[0246] This document, illustrated with reference to the accompanying drawings, describes exemplary configurations but does not represent all examples that can be implemented or fall within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration" and does not imply "superior" or "outperforming" other examples. This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0247] The description provided herein is intended to enable those skilled in the art to make or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the universal principles defined herein can be applied to other variations without departing from the scope of this disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for performing wireless communication at a first wireless device, comprising: The first wireless device identifies one or more default operating frequencies for communication over a bandwidth, each of the one or more default operating frequencies being predefined by the antenna array configuration of the first wireless device, wherein identifying the one or more default operating frequencies includes identifying a first operating frequency boundary and a second operating frequency boundary for each of the one or more default operating frequencies, the first operating frequency boundary being different from the second operating frequency boundary. Transmit to a second wireless device a message including an indication of one or more default operating frequencies of the first wireless device, wherein the indication of the one or more default operating frequencies includes an indication of at least the first operating frequency boundary, or the second operating frequency boundary, or any combination thereof; and The second wireless device communicates with the first wireless device over the bandwidth based at least in part on one or more of the default operating frequencies.

2. The method of claim 1, further comprising: Receive first system information, the first system information including parameters indicating a mapping for a set including one or more cells, wherein each cell in the set including one or more cells operates using at least one antenna array configuration that is the same as the antenna array configuration of the first wireless device; Store the first system information including the parameters; The stored first system information is compared with the second system information received from the first cell in the set including one or more cells; as well as Based at least in part on the comparison, the one or more default operating frequencies are used to communicate with one or more wireless devices associated with the first cell.

3. The method of claim 1, further comprising: Receive a second message from a second wireless device, the second message including an indication of one or more default operating frequencies of the second wireless device; as well as The one or more default operating frequencies of the second wireless device are determined at least in part based on the second message, wherein the one or more default operating frequencies of the second wireless device are determined by at least the following: the antenna configuration of the second wireless device, or one or more carrier frequencies associated with the analog beamforming codebook of the second wireless device, or frequency bands from a set of frequency bands, or channels from a set of channels, or any combination thereof.

4. The method of claim 3, further comprising: One or more communication parameters are selected at least in part based on the one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device, wherein communication with the second wireless device on the bandwidth is at least in part based on the selected one or more communication parameters.

5. The method of claim 4, wherein the one or more communication parameters include beamforming parameters of the analog beamforming codebook associated with the antenna array of the first wireless device.

6. The method of claim 3, further comprising: At least the frequency band, or the channel, or any combination thereof, is selected for communication with the second wireless device based at least in part on the one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device, wherein communication with the second wireless device over the bandwidth is at least in part based on the selected frequency band, or the channel, or any combination thereof.

7. The method of claim 3, further comprising: Determine that the first default operating frequency of the first wireless device and the second default operating frequency of the second wireless device satisfy a predetermined threshold difference; as well as The third default operating frequency of the first wireless device is selected at least in part based on the determination, the third default operating frequency being different from the first default operating frequency, wherein communication with the second wireless device on the bandwidth is at least in part based on the third default operating frequency.

8. The method of claim 1, wherein the first operating frequency boundary includes an upper frequency boundary and the second operating frequency boundary includes a lower frequency boundary, and wherein one or more operating frequencies within the upper frequency boundary and the lower frequency boundary provide beamforming performance that satisfies a performance threshold, the performance threshold being at least partially based on a signal strength threshold for communication on the one or more operating frequencies.

9. The method of claim 1, wherein transmitting the message including the indication of the one or more default operating frequencies of the first wireless device comprises: A capability message is transmitted to the second wireless device, including an indication of the one or more default operating frequencies of the first wireless device.

10. The method of claim 1, wherein transmitting the message including the indication of the one or more default operating frequencies of the first wireless device comprises: Control information, including the indication of one or more default operating frequencies of the first wireless device, is transmitted to the second wireless device.

11. The method of claim 1, wherein the one or more default operating frequencies of the first wireless device indicate a performance metric for the set of frequencies over the bandwidth.

12. The method of claim 1, wherein the one or more default operating frequencies of the first wireless device indicate the antenna array configuration of the first wireless device, the antenna array configuration including the inter-antenna spacing of an antenna array having uniformly spaced antenna elements or non-uniformly spaced antenna elements.

13. The method of claim 1, wherein the antenna array configuration includes the number of radio frequency chains associated with the antenna array of the first wireless device.

14. The method of claim 1, wherein the one or more default operating frequencies are specific to the first wireless device.

15. The method of claim 1, wherein the first wireless device or the second wireless device or both comprise user equipment, or client equipment, or base station, or integrated access and backhaul node, or wireless repeater, or sidelink node.

16. A method for performing wireless communication at a first wireless device, comprising: Receives a message from a second wireless device including an indication of one or more default operating frequencies of the second wireless device for communicating over bandwidth, wherein the one or more default operating frequencies of the second wireless device are at least partially based on the antenna array configuration of the second wireless device; A first operating frequency boundary and a second operating frequency boundary of the one or more default operating frequencies of the second wireless device are identified according to the indication of the one or more default operating frequencies, wherein the first operating frequency boundary is different from the second operating frequency boundary. One or more communication parameters are configured, at least in part, based on one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device; as well as The communication with the second wireless device over the bandwidth is based at least in part on one or more of the communication parameters, wherein the communication with the second wireless device over the bandwidth is based at least in part on the first operating frequency boundary, or the second operating frequency boundary, or any combination thereof.

17. The method of claim 16, further comprising: Transmit system information, the system information including parameters indicating a mapping for a set comprising one or more cells, wherein each cell in the set comprising one or more cells operates using at least one antenna array configuration identical to the antenna array configuration of the second wireless device.

18. The method of claim 16, further comprising: The antenna array configuration of the second wireless device, or one or more carrier frequencies corresponding to the analog beamforming codebook of the second wireless device, or any combination thereof, are identified at least in part based on the one or more default operating frequencies of the second wireless device. as well as The one or more communication parameters are selected at least in part based on the antenna array configuration of the second wireless device, the one or more carrier frequencies, or any combination thereof.

19. The method of claim 16, further comprising: At least partially based on the one or more default operating frequencies of the second wireless device to identify at least a frequency band from the set of frequency bands, or a channel from the set of channels, or any combination thereof; and The one or more communication parameters are selected at least in part based on the frequency band, the channel, or any combination thereof.

20. The method of claim 16, further comprising: Estimate the simulated beamforming performance of the frequency set over the bandwidth, wherein the one or more default operating frequencies of the second wireless device indicate a performance metric for the frequency set.

21. The method of claim 16, further comprising: Determine that the first default operating frequency of the first wireless device and the second default operating frequency of the second wireless device satisfy a predetermined threshold difference; as well as A third default operating frequency for the first wireless device is selected at least in part based on the determination, the third default operating frequency being different from the first default operating frequency, wherein communication with the second wireless device within the bandwidth is at least in part based on the third default operating frequency.

22. The method of claim 16, wherein the first operating frequency boundary includes an upper frequency boundary and the second operating frequency boundary includes a lower frequency boundary, and wherein one or more operating frequencies within the upper frequency boundary and the lower frequency boundary provide beamforming performance that satisfies a performance threshold, the performance threshold being at least partially based on a signal strength threshold for communication on the one or more operating frequencies.

23. The method of claim 16, wherein the one or more communication parameters include analog beamforming parameters of an analog beamforming codebook associated with the antenna array of the second wireless device.

24. The method of claim 16, wherein receiving the indication of the one or more default operating frequencies of the second wireless device comprises: The capability message received from the second wireless device includes an indication of one or more default operating frequencies of the first wireless device.

25. The method of claim 16, wherein receiving the indication of the one or more default operating frequencies of the second wireless device comprises: Receive control information from the second wireless device, including the indication of one or more default operating frequencies of the first wireless device.

26. The method of claim 16, wherein the one or more default operating frequencies of the second wireless device indicate the antenna array configuration of the second wireless device, the antenna array configuration of the second wireless device including the inter-antenna spacing of an antenna array having uniformly spaced antenna elements or non-uniformly spaced antenna elements.

27. An apparatus for performing wireless communication at a first wireless device, comprising: processor; Memory coupled to the processor; as well as Instructions, which are stored in the memory and can be executed by the processor, to cause the device to: The first wireless device identifies one or more default operating frequencies for communication over a bandwidth, each of the one or more default operating frequencies being predefined by the antenna array configuration of the first wireless device, wherein identifying the one or more default operating frequencies includes identifying a first operating frequency boundary and a second operating frequency boundary for each of the one or more default operating frequencies, the first operating frequency boundary being different from the second operating frequency boundary. Transmit to a second wireless device a message including an indication of one or more default operating frequencies of the first wireless device, wherein the indication of the one or more default operating frequencies includes an indication of at least the first operating frequency boundary, or the second operating frequency boundary, or any combination thereof; and The second wireless device communicates with the first wireless device over the bandwidth based at least in part on one or more of the default operating frequencies.

28. An apparatus for performing wireless communication at a first wireless device, comprising: processor; Memory coupled to the processor; as well as Instructions, which are stored in the memory and can be executed by the processor to cause the device to perform the method as described in any one of claims 2-15.

29. An apparatus for performing wireless communication at a first wireless device, comprising: processor; Memory coupled to the processor; as well as Instructions, which are stored in the memory and can be executed by the processor, to cause the device to: Receives a message from a second wireless device including an indication of one or more default operating frequencies of the second wireless device for communicating over bandwidth, wherein the one or more default operating frequencies of the second wireless device are at least partially based on the antenna array configuration of the second wireless device; A first operating frequency boundary and a second operating frequency boundary of the one or more default operating frequencies of the second wireless device are identified according to the indication of the one or more default operating frequencies, wherein the first operating frequency boundary is different from the second operating frequency boundary. One or more communication parameters are configured, at least in part, based on one or more default operating frequencies of the first wireless device and the one or more default operating frequencies of the second wireless device; as well as The communication with the second wireless device over the bandwidth is based at least in part on one or more of the communication parameters, wherein the communication with the second wireless device over the bandwidth is based at least in part on the first operating frequency boundary, or the second operating frequency boundary, or any combination thereof.

30. An apparatus for performing wireless communication at a first wireless device, comprising: processor; Memory coupled to the processor; as well as Instructions, which are stored in the memory and can be executed by the processor to cause the device to perform the method as described in any one of claims 17-26.

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