WO2022011489A1

WO2022011489A1 - Operation state determining and switching

Info

Publication number: WO2022011489A1
Application number: PCT/CN2020/101521
Authority: WO
Inventors: Chenxi HAO; Chao Wei; Hao Xu; Qiaoyu Li; Min Huang; Jing Dai; Peter Gaal; Wanshi Chen
Original assignee: Qualcomm Incorporated
Priority date: 2020-07-11
Filing date: 2020-07-11
Publication date: 2022-01-20

Abstract

Methods, systems, and devices for wireless communications are described. A device, such as a UE, may receive one or more first downlink transmissions and may determine a first operation state and a second operation state. The second operation state may be for receiving one or more second downlink transmissions, where the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions. The UE may identify, after receiving the one or more first downlink transmissions, that a switching duration gap occurred based on the first operation state being different than the second operation state. The UE may receive the one or more second downlink transmissions in the second operation state based on identifying that the switching duration has occurred.

Description

OPERATION STATE DETERMINING AND SWITCHING

FIELD OF TECHNOLOGY

The following relates generally to wireless communications and more specifically to operation state determining and switching.

BACKGROUND

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

SUMMARY

The described techniques relate to improved methods, systems, devices, and apparatuses that support operation state determining and switching. Generally, the described techniques provide for a user equipment (UE) to determine when to apply a switching duration between receiving various transmissions. For example, a UE may receive one or more first downlink transmissions and may determine a first operation state and a second operation state. The second operation state may be for receiving one or more second downlink transmissions, where the one or more second downlink transmissions may be scheduled or configured to be received after the one or more first downlink transmissions. The UE may identify, after receiving the one or more first downlink transmissions, that a switching duration (e.g., a switching duration gap) occurred based on the first operation state being different than the second operation state. The UE may receive the one or more second downlink transmissions based on identifying that the switching duration (e.g., a switching duration gap) has occurred.

A method for wireless communication is described. The method may include receiving one or more first downlink transmissions, determining a first operation state and a second operation state, where the second operation state is for receiving one or more second downlink transmissions, where the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions, identifying, after receiving the one or more first downlink transmissions, that a switching duration has occurred based on the first operation state being different than the second operation state, and receiving the one or more second downlink transmissions based on identifying that the switching duration has occurred.

An apparatus for wireless communication is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive one or more first downlink transmissions, determine a first operation state and a second operation state, where the second operation state is for receiving one or more second downlink transmissions, where the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions, identify, after receiving the one or more first downlink transmissions, that a switching duration has occurred based on the first operation state being different than the second operation state, and receive the one or more second downlink transmissions based on identifying that the switching duration has occurred.

Another apparatus for wireless communication is described. The apparatus may include means for receiving one or more first downlink transmissions, means for determining a first operation state and a second operation state, where the second operation state is for receiving one or more second downlink transmissions, where the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions, means for identifying, after receiving the one or more first downlink transmissions, that a switching duration has occurred based on the first operation state being different than the second operation state, and means for receiving the one or more second downlink transmissions based on identifying that the switching duration has occurred.

A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable by a processor to receive one or more first downlink transmissions, determine a first operation state and a second operation state, where the second operation state is for receiving one or more second downlink transmissions, where the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions, identify, after receiving the one or more first downlink transmissions, that a switching duration has occurred based on the first operation state being different than the second operation state, and receive the one or more second downlink transmissions based on identifying that the switching duration has occurred.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining a downlink transmission interruption during the switching duration, where receiving the one or more second downlink transmissions may be based on determining the downlink transmission interruption.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining the first operation state and the second operation state may be based on which one or more carriers the one or more first downlink transmissions and the one or more second downlink transmissions, respectively, may be transmitted on.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first operation state being different than the second operation state may be based on a first carrier on which the one or more first downlink transmissions may be transmitted being different than a second carrier on which the one or more second downlink transmissions may be transmitted.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, determining the second operation state may include operations, features, means, or instructions for mapping the one or more second downlink transmissions to the second operation state based on a first number of antenna ports for receiving the one or more second downlink transmissions over a first carrier and a second number of antenna ports for receiving the one or more second downlink transmissions over a second carrier.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, determining the first operation state may include operations, features, means, or instructions for mapping the one or more first downlink transmissions to the first operation state based on a third number of antenna ports for receiving the one or more first downlink transmissions over the first carrier and a fourth number of antenna ports for receiving the one or more first downlink transmissions.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, mapping the one or more second downlink transmissions to the second operation state may include operations, features, means, or instructions for selecting the second operation state based on a first number of receivers being greater than or equal to the first number of antenna ports scheduled or configured on the first carrier of the one of the one or more second downlink transmissions and a second number of receivers being greater than or equal to the second number of antenna ports scheduled or configured on the second carrier of the one or more second downlink transmissions.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, a mapping between the second operation state and the first and second antenna ports may be configured via radio resource control signaling or medium access control (MAC) control element signaling.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, determining the second operation state may include operations, features, means, or instructions for determining whether to map the one or more second downlink transmissions to the second operation state according to a carrier on which the one or more second downlink transmissions may be scheduled or configured or according to a number of antenna ports used for reception of the one or more second downlink transmissions based on a channel type associated with the one or more second downlink transmissions.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for mapping the one or more second downlink transmissions to the second operation state according to the carrier based on the channel type being associated with reception of the channel state information reference signal.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting an indication of whether a capability may be supported for determining the second operation state according to which carrier the one or more second downlink transmissions may be received on, according to a number of antenna ports used for reception of the one or more second downlink transmissions, or both, and receiving an indication to determine the second operation state according to which carrier the one or more second downlink transmissions may be received on or according to the number of antenna ports.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication to determine the second operation state according to which carrier the one or more second downlink transmissions may be received on or the number of antenna ports may be received via radio resource control signaling.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for switching between a first receiver and a second receiver according to the switching duration no more than once per slot.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that a first subcarrier spacing associated with a first carrier may be different than a second subcarrier spacing associated with a second carrier, where determining to switch according to the switching duration no more than once per slot may be based on a carrier of the first carrier and the second subcarrier whose subcarrier spacing may be larger.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving an indication of a location of the switching duration, and determining that the switching duration may be on a first carrier or a second carrier based on receiving the indication of the location.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that the location of the switching duration may be at the end of a slot based on receiving the indication of the location.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication of the location may be received via radio resource control signaling.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, each of the one or more first downlink transmissions and the one or more second downlink transmissions include a first downlink transmission on a first carrier, a second downlink transmission on a second carrier, or both.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first carrier includes a supplementary downlink carrier of a serving cell and the second carrier includes a downlink carrier of the serving cell, the first carrier includes a first New Radio (NR) band and the second carrier includes a second NR band, or the first carrier includes an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (E-UTRA) carrier and the second carrier includes an NR carrier.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, each of the first and second operation states include a first number of receiving chains on a first carrier and a second number of receiving chains on a second carrier, and where the first operation state being different than the second operation state includes the first number of receiving chains on the first carrier in the first operation state being different than the first number of receiving chains on the first carrier in the second operation state, the second number of receiving chains on the second carrier in the first operation state being different than the second number of receiving chains on the second carrier in the second operation state, or both.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining the first operation state may be based on the one or more first downlink transmissions.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the switching duration may be located on a first carrier based on the first carrier spanning a lower range of frequencies than a second carrier.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the switching duration may be located on a first carrier based on the first carrier being associated with a fewer number of receivers than a second carrier.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, one of the one or more first downlink transmissions and the one or more second downlink transmissions may be received over a first carrier and other of the one or more first downlink transmissions and the one or more second downlink transmissions may be received over the first carrier and a second carrier, and where the switching duration may be located on the first carrier based on the one or more first downlink transmissions and the one or more second downlink transmissions being received over the first carrier.

A method for wireless communication is described. The method may include determining a switching duration that occurs based on a first operation state of a UE being different than a second operation state of the UE, where the first operation state is associated with one or more first downlink transmissions and the second operation state is associated with one or more second downlink transmissions and transmitting, to the UE, the one or more first downlink transmissions and the one or more second downlink transmissions based on the determined switching duration.

An apparatus for wireless communication is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to determine a switching duration that occurs based on a first operation state of a UE being different than a second operation state of the UE, where the first operation state is associated with one or more first downlink transmissions and the second operation state is associated with one or more second downlink transmissions and transmit, to the UE, the one or more first downlink transmissions and the one or more second downlink transmissions based on the determined switching duration.

Another apparatus for wireless communication is described. The apparatus may include means for determining a switching duration that occurs based on a first operation state of a UE being different than a second operation state of the UE, where the first operation state is associated with one or more first downlink transmissions and the second operation state is associated with one or more second downlink transmissions and means for transmitting, to the UE, the one or more first downlink transmissions and the one or more second downlink transmissions based on the determined switching duration.

A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable by a processor to determine a switching duration that occurs based on a first operation state of a UE being different than a second operation state of the UE, where the first operation state is associated with one or more first downlink transmissions and the second operation state is associated with one or more second downlink transmissions and transmit, to the UE, the one or more first downlink transmissions and the one or more second downlink transmissions based on the determined switching duration.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for refraining from transmitting the one or more first downlink transmissions and the one or more second downlink transmissions during the determined switching duration.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining the first operation state and the second operation state based on which one or more carriers the one or more first downlink transmissions and the one or more second downlink transmissions, respectively, may be transmitted on.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first operation being different than the second operation state may be based on a first carrier on which the one or more first downlink transmissions may be transmitted being different than a second carrier on which the one or more second downlink transmissions may be transmitted.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for mapping the one or more second downlink transmissions to the second operation state based on a first number of antenna ports for receiving the one or more second downlink transmissions over a first carrier and a second number of antenna ports for receiving the one or more second downlink transmissions over a second carrier.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for mapping the one or more first downlink transmissions to the first operation state based on a third number of antenna ports for receiving the one or more first downlink transmissions over the first carrier and a fourth number of antenna ports for receiving the one or more first downlink transmissions.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining whether to map the one or more second downlink transmissions to the second operation state according to a carrier on which the one or more second downlink transmissions may be scheduled or configured or according to a number of antenna ports used for reception of the one or more second downlink transmissions based on a channel type associated with the one or more second downlink transmissions.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for mapping the one or more second downlink transmissions to the second operation state according to the carrier based on the channel type being associated with communication of the channel state information reference signal.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving an indication of whether a capability may be supported for determining the second operation state according to which carrier the one or more second downlink transmissions may be received on, according to a number of antenna ports used for reception of the one or more second downlink transmissions, or both, and transmitting an indication to determine the second operation state according to which carrier the one or more second downlink transmissions may be received on or according to the number of antenna ports.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication to determine the second operation state according to which carrier the one or more second downlink transmissions may be received on or the number of antenna ports may be transmitted via radio resource control signaling.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting an indication of a location of the switching duration, where transmitting the one or more first downlink transmissions and the one or more second downlink transmissions may be based on the location of the switching duration.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication of the location may be transmitted via radio resource control signaling.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example of a system for wireless communications that supports operation state determining and switching in accordance with aspects of the present disclosure.

FIG. 2 illustrates an example of a wireless communications system that supports operation state determining and switching in accordance with aspects of the present disclosure.

FIG. 3 illustrates an example of a switching duration scheme that supports operation state determining and switching in accordance with aspects of the present disclosure.

FIG. 4 illustrates an example of a switching duration scheme that supports operation state determining and switching in accordance with aspects of the present disclosure.

FIG. 5 illustrates an example of a process flow that supports operation state determining and switching in accordance with aspects of the present disclosure.

FIGs. 6 and 7 show block diagrams of devices that support operation state determining and switching in accordance with aspects of the present disclosure.

FIG. 8 shows a block diagram of a communication manager that supports operation state determining and switching in accordance with aspects of the present disclosure.

FIG. 9 shows a diagram of a system including a device that supports operation state determining and switching in accordance with aspects of the present disclosure.

FIGs. 10 and 11 show block diagrams of devices that support operation state determining and switching in accordance with aspects of the present disclosure.

FIG. 12 shows a block diagram of a communication manager that supports operation state determining and switching in accordance with aspects of the present disclosure.

FIG. 13 shows a diagram of a system including a device that supports operation state determining and switching in accordance with aspects of the present disclosure.

FIG. 14 shows a flowchart illustrating a method that supports operation state determining and switching in accordance with aspects of the present disclosure.

FIGs. 15 through 17 show flowcharts illustrating methods that support operation state determining and switching in accordance with aspects of the present disclosure.

DETAILED DESCRIPTION

In some examples, a user equipment (UE) may have two radio frequency (RF) chains for receiving downlink transmissions. The first RF chain may be coupled with and receive transmissions from, for example, a high-band antenna and the second RF chain may be selectively couplable with and may receive transmissions from, for example, a high-band antenna or a low-band antenna. When both RF chains are coupled with respective high-band antennas (e.g., a first operation state) , the UE may more effectively pick up transmissions over a high-band carrier. Additionally, when one RF chain is coupled with the high-band antenna and the other is coupled with the low-band antenna (e.g., a second operation state) , the UE may be capable of detecting transmissions over a low-band carrier and/or a high-band carrier with a lower rank. In some examples, a UE may switch from the first operation state to the second operation state or vice-versa. When switching between operation states, the UE may determine that it is not to receive any downlink transmissions. As such, during a switching period between operation states, a downlink transmission interruption may occur.

To enable a UE to have sufficient time to switch between operation states, the UE may employ a switching duration in which the UE does not receive transmissions over a high-band carrier, a low-band carrier, or both. The UE may employ the switching duration if the operation state for a first downlink transmission is different than the operation state for a second downlink transmission. To determine an operation state for a scheduled or configured downlink transmission, the UE may determine the operation state based on which carrier the downlink transmission is scheduled or configured to be received on. For instance, if the first downlink transmission is scheduled to be received on a first carrier and the second downlink transmission is scheduled to be received in a second carrier, the UE may determine a first operation state for the first downlink transmission and a second, different operation state for the second downlink transmission. Additionally or alternatively, the UE may determine the operation state associated with a downlink transmission based on a number of antenna ports for receiving the downlink transmission. For instance, if a first number of antenna ports used for receiving the first downlink transmission over a first carrier is different than a second number of antenna ports used for receiving the second downlink transmission over the first carrier, if a third number of antenna ports used for receiving the first downlink transmission over the second carrier is different than a fourth number of antenna ports used for receiving the second downlink transmission over the second carrier, or both, the UE may determine a first operation state for the first downlink transmission and a second, different operation state for the second downlink transmission.

Aspects of the disclosure are initially described in the context of wireless communications systems. Additional aspects of the disclosure are described with reference to switching duration schemes and a process flow. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to operation state determining and switching.

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

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

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

The base stations 105 may communicate with the core network 130, or with one another, or both. For example, the base stations 105 may interface with the core network 130 through one or more backhaul links 120 (e.g., via an S1, N2, N3, or other interface) . The base stations 105 may communicate with one another over the backhaul links 120 (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations 105) , or indirectly (e.g., via core network 130) , or both. In some examples, the backhaul links 120 may be or include one or more wireless links.

One or more of the base stations 105 described herein may include or may be referred to by a person having ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB) , a Home NodeB, a Home eNodeB, or other suitable terminology.

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

The UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115 that may sometimes act as relays as well as the base stations 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.

The UEs 115 and the base stations 105 may wirelessly communicate with one another via one or more communication links 125 over one or more carriers. The term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication links 125. For example, a carrier used for a communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP) ) that is operated 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 that coordinates operation for the carrier, user data, or other signaling. The wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation. A UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers.

In some examples (e.g., in a carrier aggregation configuration) , a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers. A carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN) ) and may be positioned according to a channel raster for discovery by the UEs 115. A carrier may be operated in a standalone mode where initial acquisition and connection may be conducted by the UEs 115 via the carrier, or the carrier may be operated in a non-standalone mode where a connection is anchored using a different carrier (e.g., of the same or a different radio access technology) .

The communication links 125 shown in the wireless communications system 100 may include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions from a base station 105 to a UE 115. Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode) .

A carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100. For example, the carrier bandwidth may be one of a number of determined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz) ) . Devices of the wireless communications system 100 (e.g., the base stations 105, the UEs 115, or both) may have hardware configurations that support communications over a particular carrier bandwidth or may be configurable to support communications over one of a set of carrier bandwidths. In some examples, the wireless communications system 100 may include base stations 105 or UEs 115 that support simultaneous communications via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured for operating over portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.

Signal waveforms transmitted over a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) . In a system employing MCM techniques, a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both) . Thus, the more resource elements that a UE 115 receives and the higher the order of the modulation scheme, the higher the data rate may be for the UE 115. A wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers or beams) , and the use of multiple spatial layers may further increase the data rate or data integrity for communications with a UE 115.

The time intervals for the base stations 105 or the UEs 115 may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of T _s = 1/ (Δf _max·N _f) seconds, where Δf _max may represent the maximum supported subcarrier spacing, and N _f may represent the maximum supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms) ) . Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023) .

Each frame may include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of slots. Alternatively, each frame may include a variable number of slots, and the number of slots may depend on subcarrier spacing. Each slot may include a number of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) . In some wireless communications systems 100, a slot may further be divided into multiple mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N _f) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.

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

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

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

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

In some examples, a UE 115 may also be able to communicate directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol) . One or more UEs 115 utilizing D2D communications may be within the geographic coverage area 110 of a base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of a base station 105 or be otherwise unable to receive transmissions from a base station 105. In some examples, groups of the UEs 115 communicating via D2D communications may utilize a one-to-many (1: M) system in which each UE 115 transmits to every other UE 115 in the group. In some examples, a base station 105 facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between the UEs 115 without the involvement of a base station 105.

The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or 5G core (5GC) , which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management function (AMF) ) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the base stations 105 associated with the core network 130. User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to the network operators IP services 150. The operators IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.

Some of the network devices, such as a base station 105, may include subcomponents such as an access network entity 140, which may be an example of an access node controller (ANC) . Each access network entity 140 may communicate with the UEs 115 through one or more other access network transmission entities 145, which may be referred to as radio heads, smart radio heads, or transmission/reception points (TRPs) . Each access network transmission entity 145 may include one or more antenna panels. In some configurations, various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station 105) .

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

The wireless communications system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in unlicensed radio frequency spectrum bands, devices such as the base stations 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance. In some examples, operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA) . Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.

A base station 105 or a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a base station 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a base station 105 may be located in diverse geographic locations. A base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with a UE 115. Likewise, a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, an antenna panel may support radio frequency beamforming for a signal transmitted via an antenna port.

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

Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be multiple-access systems capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) . A wireless network, for example a wireless local area network (WLAN) , such as a Wi-Fi (i.e., Institute of Electrical and Electronics Engineers (IEEE) 802.11) network may include an access point (AP) that may communicate with one or more wireless or mobile devices. The AP may be coupled to a network, such as the Internet, and may enable a mobile device to communicate via the network (or communicate with other devices coupled to the access point) . A wireless device may communicate with a network device bi-directionally. For example, in a WLAN, a device may communicate with an associated AP via downlink (e.g., the communication link from the AP to the device) and uplink (e.g., the communication link from the device to the AP) . A wireless personal area network (PAN) , which may include a Bluetooth connection, may provide for short range wireless connections between two or more paired wireless devices. For example, wireless devices such as cellular phones may utilize wireless PAN communications to exchange information such as audio signals with wireless headsets.

Generally, the described techniques provide for a UE 115 to determine when to apply a switching duration between receiving transmissions. For example, a UE 115 may receive, from a base station 105, one or more first downlink transmissions and may determine a first operation state and a second operation state. The second operation state may be for receiving one or more second downlink transmissions, where the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions. The UE 115 may identify, after receiving the one or more first downlink transmissions, that a switching duration (e.g., a switching duration gap) occurred based on the first operation state being different than the second operation state. The UE 115 may receive, from the base station 105, the one or more second downlink transmissions based on identifying that the switching duration has occurred.

FIG. 2 illustrates an example of a wireless communications system 200 that supports operation state determining and switching in accordance with aspects of the present disclosure. In some examples, wireless communications system 200 may implement aspects of wireless communications system 100. For instance, base station 105-a may be an example of a base station 105 as described with reference to FIG. 1 and UE 115-a may be an example of a UE 115 as described with reference to FIG. 1.

Base station 105-a may communicate with UE 115-a over a first carrier 202-a and a second carrier 202-b. In some examples, one of carriers 202-a and 202-b may be a downlink carrier of a serving cell and the other of carriers 202-a and 202-b may be a supplementary downlink carrier of a serving cell. Additionally or alternatively, one of carriers 202-a and 202-b may be a low band NR component carrier and the other of carriers 202-a and 202-b may be a high band NR component carrier. Additionally or alternatively, one of carriers 202-a and 202-b may be an LTE carrier and the other of carriers 202-a and 202-b may be an NR carrier.

In some examples, UE 115-a may support a different rank based on a band or carrier over which UE 115-a is to transmit. For instance, at a higher band or carrier (e.g., carrier 202-a) , UE 115-a may support a higher rank transmission and/or a larger number of radio frequency (RF) chains 225 (e.g., 2) and at a lower band or carrier (e.g., carrier 202-b) , UE 115-a may support a lower rank transmission and/or a fewer number of RF chains 225 (e.g., 1) . UE 115-a may support the higher rank transmission and/or higher number of RF chains 225 due to the higher band or carrier having more available resources. Additionally or alternatively, UE 115-a may support the lower rank transmission and/or the lower number of RF chains 225 due to the lower band or carrier having fewer resources and/or UE 115-a being a cell-edge UE 115.

In some examples, if UE 115-a has a reduced capability (e.g., UE 115-a is a RedCap UE 115) , UE 115-a may support multiple (e.g., two) RF chains 225 (e.g., RF chains 225-a and 225-b) and multiple (e.g., three) receivers 220 (e.g., receivers 220-a, 220-b, and 220-c) . Each receiver 220 may refer to a single antenna or to an array of associated antennas. Two of the three receivers 220 (e.g., receivers 220-a and 220-b) may be used to receive transmissions in the higher band and/or carrier (e.g., carrier 202-a) and one of the three receivers 220 (e.g., receiver 220-c) may be used to receive transmissions in the lower band and/or carrier (e.g., carrier 202-b) .

In some examples, one of the RF chains 225 may be selectively switched between two receivers 220. For instance, in a first operation state 230-a, RF chain 225-b may be coupled with receiver 220-b. In a second operation state 230-b, RF chain 225-b may be coupled with receiver 220-c. In both operation states 230-a and 230-b, RF chain 225-a may be coupled with receiver 220-a. As RF chain 225-b is coupled with one receiver 220 at a time, UE 115-a may not support two-receiver reception on a high band (e.g., when RF chain 225-a is coupled with receiver 220-a and RF chain 225-b is coupled with receiver 220-b) and one-receiver reception on a low band (e.g., when RF chain 225-a is coupled with receiver 220-a and RF chain 225-b is coupled with receiver 220-c) simultaneously.

In general, an operation state 230 may include a number of receivers or RF chains on a first carrier and a number of receivers or RF chains on a second carrier. For example, when UE 115-a is operating in first operation state 230-a, the number of RF chains for receiving transmissions in the lower and upper bands and/or carriers may be represented by the pair (0R, 2R) , where the first entry of the pair (e.g., 0R) may refer to a number of RF chains 225 for receiving transmissions in the lower band and/or carrier (e.g., carrier 202-b) and the second entry of the pair (e.g., 2R) may refer to a number of RF chains 225 for receiving transmissions in the upper band and/or carrier. Similarly, when operating in second operation state 230-b, the number of RF chains 225 in the lower and upper bands may be represented by pair (1R, 1R) . The transmission on a high or low band may be semi-static (e.g., configured via radio resource control (RRC) or medium access control (MAC) control element (MAC-CE) or dynamic (e.g., configured via downlink control information (DCI) ) based on base station 105-a scheduling across carrier 202-a and 202-b (e.g., supplementary downlink (SDL) , carrier aggregation (CA) , E-UTRA NR dual connectivity (EN-DC) ) . In some examples, an operation state 230 may also be referred to as a receiver state.

In some examples, there may be an associated amount of time involved with switching from receiver 220-b to receiver 220-c or vice-versa, which may be referred to as a switching duration or a switching duration gap. During the switching duration, UE 115-a may determine that UE 115-a is not to receive any downlink transmissions. The methods as described herein may describe a timing for the switching duration (e.g., at least N ₁ symbols for physical downlink shared channel (PDSCH) reception or CSI-RS measurement) . Additionally the methods as described herein may define one or more events triggering the switching duration and may address a processing complexity for UE 115-a. In some examples, the switching duration may be referred to as a switching duration gap or a receiver switching duration gap.

In one example, if UE 115-a is scheduled or configured with one or more first downlink transmissions (e.g., a first one or more downlink transmissions) and one or more second downlink transmissions (e.g., a second one or more downlink transmissions) , UE 115-a may employ a switching duration if the operation state 230 used to receive the one or more first downlink transmissions and the operation state 230 used to receive the one or more second downlink transmissions are different. For instance, if UE 115-a is to receive the one or more first downlink transmissions in slot 205 of carrier 202-b in operation state 230-b and is to receive the one or more second downlink transmissions in slot 210 of carrier 202-a in operation state 230-a, UE 115-a may employ switching duration 215 to enable UE 115-a to have sufficient time to switch from operation state 230-b to operation state 230-a. In general, the one or more first and second downlink transmissions may each include a downlink transmission on carrier 202-a, a downlink transmission on carrier 202-b, or both.

In some examples, UE 115-a may have an associated number of antenna ports used for receiving a downlink transmission in one or both carriers 202. The number of antenna ports for the carriers 202 may be represented by a pair (P ₁, P ₂) , where P ₁ may represent a number of antenna ports on carrier 202-a and P ₂ may represent a number of antenna ports on carrier 202-b.

In some first examples (e.g., Option 1) , UE 115-a may determine the operation state 230 of the one or more downlink transmissions based on a carrier 202 on which the downlink transmission is scheduled or configured. For instance, if UE 115-a is scheduled or configured to receive a downlink transmission on carrier 202-b (e.g., the one or more first downlink transmissions in slot 205) , UE 115-a may determine that UE 115-a is to receive the downlink transmission in operation state 230-b. If UE 115-a is scheduled or configured to receive a downlink transmission on carrier 202-a (e.g., the one or more second downlink transmissions in slot 210) , UE 115-a may determine that UE 115-a is to receive the downlink transmission in operation state 230-a. The antenna ports for the former case may have associated pair (1P, 0P) . For the latter case, the antenna ports may have associated pair (0P, 2P) or (0P, 1P) . In some such examples where the operation state 230 is determined according to the carrier 202, simultaneous reception or transmission on different carriers 202 (e.g., on carriers 202-a and 202-b) may not occur, which may thus simplify the determination of the operation state 230. UE 115-a may determine the operation state 230 in this manner for SDL, inter-band CA, EN-DC, or any combination thereof. Additional details about UE 115-a determining the operation state 230 according to the carrier 202 may be described elsewhere herein, for instance, with reference to FIG. 3.

In some second examples (e.g., Option 2) , UE 115-a may determine the operation state 230 based on the number of antenna ports associated with each of the one or more downlink transmissions (e.g., according to the antenna port pair (P ₁, P ₂) associated with the one or more downlink transmissions) . In Option 2, simultaneous reception of a downlink transmission on two carriers 202 may be enabled. For instance, each downlink transmission may be mapped to one or more operation states 230 whose number of receivers or RF chains on a first carrier 202 (e.g., carrier 202-a) is larger than or equal to the number of antenna ports on that carrier 202 and whose number of receivers or RF chains on a second carrier 202 (e.g., carrier 202-b) is larger than or equal to the number of antenna ports on that carrier 202. Accordingly, when the number of antenna ports is given by (1P, 0P) , (1P, 1P) , (0P, 1P) , or (0P, 0P) , the operation state 230 may be operation state 230-b with pair (1R, 1R) . When the number of antenna ports is given by (0P, 0P) , (0P, 1P) , or (0P, 2P) , the operation state 230 may be operation state 230-a with pair (0R, 2R) .

In some examples, UE 115-a may receive a channel state information (CSI) reference signal (CSI-RS) . UE 115-a may receive the CSI-RS over a number of ports (e.g., 1, 2, 4, 8, 12, 16, 24, or 32 ports) , where the reception of the CSI-RS may not depend on a number of RF chains 225, which may also be referred to as receiver (Rx) chains. In such examples, the CSI-RS may be associated with multiple operating states (e.g., operating states 230-a and 230-b) where simultaneous reception on both carriers 202 (e.g., carriers 202-a and 202-b) are disabled or disallowed. In some examples, simultaneous CSI-RS transmission on multiple carriers 202 may be disabled or disallowed. For instance, UE 115-a may receive the CSI-RS in operating state 230-b (e.g., (1R, 1R) ) if receiving the CSI-RS on carrier 202-b and may receive the CSI-RS in operating state 230-a (e.g., (0R, 2R) ) if receiving the CSI-RS on carrier 202-a. When receiving CSI-RS in this manner, UE 115-a may receive other transmissions (e.g., all other transmissions) according to Option 2, in which simultaneous reception over both carriers 202-a and 202-b may be enabled, or according to Option 1. In some other examples, simultaneous CSI-RS transmission on multiple carriers 202 may be enabled or allowed. For instance, simultaneous CSI-RS transmission may be performed when UE 115-a is operating in operating state 230-b (e.g., (1R, 1R) ) . Alternatively, CSI-RS transmission on carrier 202-b only may involve UE 115-a operating in operating state 230-b (e.g., (1R, 1R) ) and CSI-RS transmission on carrier 202-a may involve UE 115-a operating in operating state 230-a (e.g., (0R, 2R) ) or operating state 230-b (e.g., (1R, 1R) ) .

If a downlink transmission is mapped to multiple operation states 230, the actual operation state 230 may be determined based on another downlink transmission received prior to the downlink transmission. For instance, when the number of antenna ports is given by (0P, 0P) or (0P, 1P) , the number of antenna ports may map to operation states 230-a and 230-b for a current downlink transmission. In such examples, if the actual operation state 230 of a previously received downlink transmission is (1R, 1R) (e.g., operation state 230-b) , the actual operation state 230 for the current downlink transmission may likewise be (1R, 1R) . Likewise, if the actual operation state 230 of the previously received transmission is (0R, 2R) (e.g., operation state 230-a) , the actual operation state 230 for the current downlink transmission may likewise be (0R, 2R) . Accordingly, UE 115-a may avoid employing a switching duration 215. Alternatively, if a downlink transmission is mapped to multiple operation states 230, the actual operation state 230 that UE 115-a is to use may be configured via semi-static signaling (e.g., RRC or MAC-CE signaling) or may depend on a capability of UE 115-a. UE 115-a may determine the operation state 230 according to the number of antenna ports for inter-band CA or EN-DC. Additional details about determining the operation state 230 according to the number of antenna ports may be described elsewhere in, for instance, with reference to FIG. 4.

In some examples, whether UE 115-a determines the operation state 230 according to Option 1 or Option 2 may be based on a capability of UE 115-a. If UE 115-a supports both Option 1 and Option 2, the actual option may be configured via higher-layer signaling (e.g., RRC) .

In some examples, UE 115-a may not perform more than one downlink receiver switching (e.g., employ more than one switching duration 215) in a slot with the larger subcarrier spacing (SCS) between two downlink carriers 202. For instance, an SCS of carrier 202-a may be smaller than an SCS of carrier 202-b. Accordingly, a switching duration 215 may occur no more than once within a duration of a slot 205 of carrier 202-b.

In some examples, the location of the switching duration 215, which may also be referred to as a switching period, may be configured via higher-layer signaling (e.g., via RRC signaling) . Additionally or alternatively, UE 115-a and/or base station 105-a may determine that the switching duration 215 is on the carrier 202 whose band is lower or that has a fewer number of associated receivers. Additionally or alternatively, if one or more first downlink transmissions are received over two carriers 202 and one or more second downlink transmissions are received over one carrier 202, the location of the switching period may be on the carrier 202 of the one or more second downlink transmissions (e.g., the carrier 202 that is shared for both the one or more first downlink transmissions and the one or more second downlink transmissions) .

For EN-DC, when UE 115-a is configured with Option 1 and when UE 115-a is to receive an NR downlink carrier 202-a that takes place after an E-UTRA downlink on another downlink carrier 202-b, then UE 115-a may not be expected to receive for a duration of N _Tx1-Tx2 (e.g., a switching duration) on any of the two carriers 202. When UE 115-a is configured with Option 1 and when UE 115-a is to receive an E-UTRA downlink carrier 202-b that takes place after an NR downlink on another downlink carrier 202-a, then UE 115-a may not be expected to receive for the duration of N _Tx1-Tx2 on any of the two carriers 202. When UE 115-a is configured with Option 1, UE 115-a may not be expected to receive simultaneously on the NR downlink carrier 202-a and E-UTRA downlink carrier 202-b. If UE 115-a is scheduled or configured to receive any NR downlink transmission overlapping with an E-UTRA downlink transmission, the NR downlink transmission is dropped.

For EN-DC, when UE 115-a is configured with Option 2 and when UE 115-a is to receive an NR two-port downlink carrier 202-a that takes place after an E-UTRA downlink on another downlink carrier 202-b, then UE 115-a may not be expected to receive for the duration of N _Tx1-Tx2 on any of the two carriers 202. When UE 115-a is configured with Option 2 and when UE 115-a is to receive an E-UTRA downlink carrier 202-b that takes places after an NR two-port downlink on another downlink carrier 202-a, then UE 115-a may not be expected to receive for the duration of N _Tx1-Tx2 on any of the two carriers. If UE 115-a is configured with Option 2, UE 115-a may not be expected to receive simultaneously a two-port transmission on the NR downlink and the E-UTRA downlink.

For inter-band CA, when UE 115-a is to receive a 2-port transmission on one downlink carrier 202-a and if the preceding downlink transmission is a 1-port transmission on another downlink carrier 202-b, then UE 115-a may not be expected to receive for the duration of N _Tx1-Tx2 on any of the two carriers 202. When UE 115-a is to receive a 1-port transmission on one downlink carrier 202-b and if the preceding downlink transmission is a 2-port transmission on another downlink carrier 202-a, then UE 115-a may not be expected to receive for the duration of N _Tx1-Tx2 on any of the two carriers 202. For UE 115-a configured with Option 1 by the parameter downlinkRxSwitchingOption, when UE 115-a is to receive a 1-port transmission on one downlink carrier 202 and if the preceding downlink transmission was a 1-port transmission on another downlink carrier 202, then UE 115-a is not expected to receive for the duration of N _Tx1-Tx2 on any of the two carriers 202. For UE 115-a configured with Option 2 by the parameter downlinkRxSwitchingOption, when UE 115-a is to receive a 2-port transmission on one downlink carrier 202-a and if the preceding downlink transmission was a 1-port transmission on the same downlink carrier 202-a and UE 115-a is under the operation state 230 in which 2-port transmission cannot be supported in the same downlink carrier 202-a (e.g., operating state 230-b) , then UE 115-a is not expected to receive for the duration of N _Tx1-Tx2 on any of the two carriers 202. For UE 115-a configured with Option 2 by the parameter downlinkRxSwitchingOption, when UE 115-a is to receive a 1-port transmission on one downlink carrier 202-b and if the preceding downlink transmission was a 1-port transmission on another downlink carrier 202-a and UE 115-a is under the operation state 230 in which 2-port transmission can be supported on the same downlink carrier 202-a, then UE 115-a may not be expected to receive for the duration of N _Tx1-Tx2 on any of the two carriers 202. UE 115-a may not be expected to be scheduled or configured with downlink transmissions that result in simultaneous reception on two antenna ports on one downlink carrier 202-a, and any transmission on another downlink carrier 202-b. In all other cases UE 115-a may be expected to receive normally all downlink transmissions without interruptions

For supplementary downlink, if UE 115-a is to receive any downlink channel or signal on a different downlink from the preceding transmission occasion based on DCI (s) received before T ₀-T _offset or based on a higher layer configuration (s) , then UE 115-a assumes that a downlink switching is triggered in a duration of switching duration gap N _Tx1-Tx2, where T ₀ is the start time of the first symbol of the transmission occasion of the downlink channel or signal and T _offset is the preparation procedure time of the transmission occasion of the downlink channel or signal. During the switching duration gap N _Tx1-Tx2, UE 115-a is not expected to receive on any of the two downlinks.

FIG. 3 illustrates an example of a switching duration scheme 300 that supports operation state determining and switching in accordance with aspects of the present disclosure. In some examples, switching duration scheme 300 may be implemented by aspects of wireless communications system 100. For instance, switching duration scheme 300 may represent a scheme according to which a UE 115 may determine whether or not to apply a switching duration between receiving transmissions according to Option 1.

A UE 115 may communicate with a base station 105 over carriers 302-a and 302-b. Carrier 302-a may include slots 310 and carrier 302-b may include slots 305. The slots 305 of carrier 302-b may have half the length of the slots 310 of carrier 302-a and each slot 310 of carrier 302-a may overlap with two slots 305 of carrier 302-b. Each

slot

305 and 310 may be a downlink slot (i.e., ‘D’ ) , an uplink slot (i.e., ‘U’ ) , or a special slot (i.e., S’) . Carrier 302-a may be an FDD uplink carrier and carrier 302-b may be a TDD carrier. In some examples, carrier 302-a may have a narrower bandwidth than carrier 302-b. In some examples, 5 slots 310 and/or 10 slots 305 may define a subframe.

One or more downlink transmissions may be scheduled or configured over the slots of carriers 302-a and 302-b. For instance, the one or more downlink transmissions may be configured or scheduled over carrier 302-a in slot 310-a, a portion of slot 310-b (e.g., the portion overlapping with slot 305-c) , and slot 310-c and over carrier 302-b in slots 305-a, 305-b, 305-d, 305-e, 305-f, and 305-g. In the present example, the first entry of an operation state may correspond to carrier 302-a and the second entry of the operation state may correspond to carrier 302-b.

The downlink transmission may be either on carrier 302-a or carrier 302-b. Once carriers 302 switch, it may be determined that the receiver is changed (e.g., the operation state is changed) . For instance, each downlink transmission in slot 305-a may be scheduled or configured in carrier 302-b and each downlink transmission in slot 305-b may be scheduled or configured in carrier 302-b. As each downlink transmission in slots 305-a and 305-b are scheduled or configured in the same carrier, the UE 115 may not employ a switching duration 320 between 305-a and 305-b.

Each downlink transmission in slot 310-a may be scheduled or configured in carrier 302-a. As such the carrier 302 in which downlink transmissions are scheduled or configured in slot 310-a is different than the carrier 302 in which downlink transmissions are scheduled or configured in slot 305-b (e.g., carrier 302-b) . Accordingly, the UE 115 may employ a switching duration 320-a at a beginning of slot 310-a or at an end of a previous slot 310 with a predefined length (e.g., 2 symbols) .

Each downlink transmission scheduled or configured in a first portion of slot 310-b of carrier 302-a (e.g., the portion overlapping with slot 305-c in carrier 302-b) may be scheduled or configured in carrier 302-a. As each downlink transmission 315 in slot 310-a and the first portion of slot 310-b are scheduled or configured in the same carrier, the UE 115 may not employ a switching duration 320 between slots 310-a and 310-b. In slot 305-d, however, which may overlap a second portion of slot 310-b, each downlink transmission 315 may be scheduled or configured in carrier 302-b. As such the carrier 302 in which downlink transmissions are scheduled or configured in slot 305-d is different than the carrier 302 in which downlink transmissions are scheduled or configured in the first portion of slot 310-b (e.g., carrier 302-a) . Accordingly, the UE 115 may employ a switching duration 320-b at an end of the first portion of slot 310-b with a predefined length (e.g., 2 symbols) .

Each downlink transmission in slot 305-e may be scheduled or configured in carrier 302-b. As each downlink transmission in slots 305-d and 305-e are scheduled or configured in the same carrier, the UE 115 may not employ a switching duration 320 in slot 305-e.

In some examples, no downlink transmissions may be scheduled or configured in slot 305-f or in the portion of a slot 310 of carrier 302-a that overlaps with slot 305-f. In slot 310-c, however, each downlink transmission in slot 310-c may be scheduled or configured in carrier 302-a. As such the carrier 302 in which downlink transmissions are scheduled or configured in slot 310-c is different than the carrier 302 in which downlink transmissions are scheduled or configured in slot 305-e (e.g., carrier 302-b) . However, in between slot 310-c and slot 305-e is a slot 305-f in which no transmissions are scheduled or configured to be received. As such, the UE 115 may switch operation states during slot 305-f.

In slot 305-g, each downlink transmission 315 may be scheduled or configured in carrier 302-b. As such the carrier 302 in which downlink transmissions are scheduled or configured in slot 305-g is different than the carrier 302 in which downlink transmissions are scheduled or configured in slot 310-c (e.g., carrier 302-a) . Accordingly, the UE 115 may employ a switching duration 320-c at an end of slot 310-c with a predefined length (e.g., 2 symbols) .

Each downlink transmission 315 in slot 305-h may be scheduled or configured in carrier 302-b. As each downlink transmission in slots 305-g and 305-h are scheduled or configured in the same carrier, the UE 115 may not employ a switching duration 320 in slot 305-h.

FIG. 4 illustrates an example of a switching duration scheme 400 that supports operation state determining and switching in accordance with aspects of the present disclosure. In some examples, switching duration scheme 400 may be implemented by aspects of wireless communications system 100. For instance, switching duration scheme 300 may represent a scheme according to which a UE 115 may determine whether or not to apply a switching duration between receiving transmissions according to Option 2.

UE 115 may communicate with base station 105 over carriers 402-a and 402-b. Carrier 402-a may include slots 410 and carrier 402-b may include slots 405. The slots 405 of carrier 402-b may have half the length of the slots 410 of carrier 402-a and each slot 410 of carrier 402-a may overlap with two slots 405 of carrier 402-b. Each

slot

405 and 410 may be a downlink slot (i.e., ‘D’ ) , an uplink slot (i.e., ‘U’ ) , or a special slot (i.e., S’) . Carrier 402-a may be an FDD uplink carrier and carrier 402-b may be a TDD carrier. In some examples, carrier 402-a may have a narrower bandwidth than carrier 402-b. In some examples, 5 slots 410 and/or 10 slots 405 may define a subframe.

One or more downlink transmissions may be scheduled or configured over the slots of carriers 402-a and 402-b. For instance, the one or more downlink transmissions may be configured or scheduled over carrier 402-a in slot 410-a, a portion of slot 410-b (e.g., the portion overlapping with slot 405-c) , slot 410-c, and slot 410-d (e.g., the portion overlapping with slot 405-k) and over carrier 402-b in slots 405-a, 405-b, 405-c, 405-f, 405-g, 405-k, and 405-l. In the present example, the first entry of an operation state and an antenna port pair may correspond to carrier 402-a and the second entry of an operation state and an antenna port pair may correspond to carrier 402-b.

Each downlink transmission 415 scheduled or configured in slot 405-a may have an associated antenna port pair (0P, 2P) and each downlink transmission 415 scheduled or configured in slot 405-b may have an associated antenna port pair (0P, 1P) . As described herein, (0P, 1P) may map to multiple operation states and, as such, the operation state for slot 405-b may be the same as the operation state for slot 405-a. In the present example, the operation state for slot 405-a may be (0R, 2R) . As such, the UE 115 for slot 405-b may have an operation state of (0R, 2R) and may not employ a switching duration 420 for slot 405-b.

Each downlink transmission 415 scheduled or configured in slot 405-c may have an associated port pair (1P, 1P) , which may map to an operation state of (1R, 1R) . The operation state for slot 405-c may be different than the operation state for slot 405-b (e.g., (0R, 2R) ) . Accordingly, the UE 115 may employ a switching duration 420-a at the beginning of slot 405-c and/or slot 410-a of a predefined length (e.g., 2 symbols) or the end of slot 410-a.

Each downlink transmission 415 scheduled or configured in slot 405-d may have an associated port pair (1P, 0P) . As described herein, (1P, 0P) may map to (1R, 1R) and, as such, the operation state for slot 405-d may be the same as the operation state for slot 405-c. As such, the UE 115 may not employ a switching duration 420 for slot 405-d.

Each downlink transmission 415 scheduled or configured in slot 405-e may have an associated port pair (1P, 0P) . As described herein, (1P, 0P) may map to an operation state (1R, 1R) and, as such, the operation state for slot 405-e (e.g., and a second portion of slot 410-a) may be the same as the operation state for slot 405-d. As such, the UE 115 may not employ a switching duration 420 for slot 405-e.

Each downlink transmission 415 scheduled or configured in slot 405-f may have an associated port pair (0P, 1P) . As described herein, (0P, 1P) may map to multiple operation states and, as such, the operation state for slot 405-f may be the same as the operation state for slot 405-e. In the present example, the operation state for slot 405-e may be (1R, 1R) . As such, the UE 115 for slot 405-f may have an operation state of (1R, 1R) and may not employ a switching duration 420 for slot 405-f.

Each downlink transmission 415 scheduled or configured in slot 405-g may have an associated port pair (0P, 1P) . As described herein, (0P, 1P) may map to multiple operation states and, as such, the operation state for slot 405-g may be the same as the operation state for slot 405-f. In the present example, the operation state for slot 405-f may be (1R, 1R) . As such, the UE 115 for slot 405-g may have an operation state of (1R, 1R) and may not employ a switching duration 420 for slot 405-g.

Each downlink transmission 415 scheduled or configured in slot 405-h may have an associated port pair (0P, 0P) . As described herein, (0P, 0P) may map to multiple operation states and, as such, the operation state for slot 405-h may be the same as the operation state for slot 405-g. In the present example, the operation state for slot 405-g may be (1R, 1R) . As such, the UE 115 for slot 405-h may have an operation state of (1R, 1R) and may not employ a switching duration 420 for slot 405-h.

Each downlink transmission 415 scheduled or configured in slot 405-i may have an associated port pair (1P, 0P) . As described herein, (1P, 0P) may map to an operation state (1R, 1R) and, as such, the operation state for slot 405-i may be the same as the operation state for slot 405-h. As such, the UE 115 may not employ a switching duration 420 for slot 405-i.

Each downlink transmission 415 scheduled or configured in slot 405-j may have an associated port pair (1P, 0P) . As described herein, (1P, 0P) may map to an operation state (1R, 1R) and, as such, the operation state for slot 405-j may be the same as the operation state for slot 405-i. As such, the UE 115 may not employ a switching duration 420 for slot 405-j.

Each downlink transmission 415 scheduled or configured in slot 405-k may have an associated port pair (1P, 1P) , which may map to an operation state of (1R, 1R) . The operation state for slot 405-c may be same as the operation state for slot 405-j. As such, the UE 115 may not employ a switching duration 420 for slot 405-k.

Each downlink transmission 415 scheduled or configured in slot 405-l may have an associated port pair (0P, 2P) , which may map to an operation state of (0R, 2R) . The operation state for slot 405-c may be different than the operation state for slot 405-k (e.g., (1R, 1R) ) . Accordingly, the UE 115 may employ a switching duration 420-b of a predefined length (e.g., 2 symbols) at the beginning of slot 405-l and/or at an end of a first portion slot 410-d (e.g., the portion overlapping slot 405-k in time) .

FIG. 5 illustrates an example of a process flow 500 that supports operation state determining and switching in accordance with aspects of the present disclosure. In some examples, process flow 500 may implemented by aspects of wireless communications system 100. For instance, process flow 500 may be implemented by a base station 105-b, which may be an example of a base station 105 as described with reference to FIG. 1, and a UE 115-b, which may be an example of a UE 115 as described with reference to FIG. 1.

At 505, base station 105-b may determine a switching duration that may occur based on a first operation state of UE 115-b being different than a second operation state of UE 115-b. The first operation state may be associated with one or more first downlink transmissions and the second operation state may be associated one or more second downlink transmissions. In some examples, the one or more second downlink transmissions may be scheduled or configured to be transmitted after the one or more first downlink transmissions.

At 510, base station 105-b may transmit the first one or more downlink transmissions to UE 115-b. In some examples, 505 may occur after 510.

At 515, UE 115-b may determine a first operation state and a second operation state. The second operate state may be for receiving the one or more second downlink transmissions. In some examples, determining the first operation state and the second operation state is based on which one or more carriers the one or more first downlink transmissions and the one or more second downlink transmissions, respectively, are transmitted on.

Additionally or alternatively, determining the second operation state may include mapping the one or more second downlink transmissions to the second operation state based on a first number of antenna ports for receiving the one or more second downlink transmissions over a first carrier and a second number of antenna ports for receiving the one or more second downlink transmissions over a second carrier.

In some such examples, the mapping may include selecting the second operation state based on a first number of receivers being greater than or equal to the first number of antenna ports scheduled or configured on the first carrier of the one of the one or more second downlink transmissions and a second number of receivers being greater than or equal to the second number of antenna ports scheduled or configured on the second carrier of the one or more second downlink transmissions. In some examples, determining the first operation state may include mapping the one or more first downlink transmissions to the first operation state based on a third number of antenna ports for receiving the one or more first downlink transmissions over the first carrier and a fourth number of antenna ports for receiving the one or more first downlink transmissions.

In some examples, a mapping between the second operation state and the first and second antenna ports is configured via RRC signaling or MAC-CE signaling. In some examples, determining the first operation state may be based on the one or more first downlink transmissions (e.g., may be the operation state UE 115-b uses to receive the one or more first downlink transmissions) .

At 520, UE 115-b may identify that a switching duration has occurred (e.g., the switching duration determined at 505) based on the first operation state being different than the second operation state. In some examples, UE 115-b may identify that the switching duration has occurred after receiving the one or more first downlink transmissions. In some examples, the first operation state being different than the second operation state is based on a first carrier on which the one or more first downlink transmissions are transmitted being different than a second carrier on which the one or more second downlink transmissions are transmitted. In some examples, UE 115-b may switch between a first receiver and a second receiver according to the switching duration no more than once per slot.

In some such examples, UE 115-b may determine that a first SCS associated with a first carrier is different than a second SCS associated with a second carrier, where determining to switch according to the switching duration no more than once per slot is based on a carrier of the first and second carriers whose SCS is larger. In some examples, each of the first and second operation states may include a first number of receiving chains on a first carrier and a second number of receiving chains on a second carrier, where the first operation state being different than the second operation state includes the first number of receiving chains on the first carrier in the first operation state being different than the first number of receiving chains on the first carrier in the second operation state, the second number of receiving chains on the second carrier in the first operation state being different than the second number of receiving chains on the second carrier in the second operation state, or both.

In some examples, the switching duration may be located on a first carrier based on the first carrier spanning a lower range of frequencies than a second carrier. In some examples, the switching duration may be located on a first carrier based on the first carrier being associated with a fewer number of receivers than a second carrier. In some examples, one of the one or more first downlink transmissions and the one or more second downlink transmissions are received by UE 115-b over a first carrier and other of the one or more first downlink transmissions and the one or more second downlink transmissions are received by UE 115-b over the first carrier and a second carrier. In some such examples, the switching duration may be located on the first carrier based on the one or more first downlink transmissions and the one or more second downlink transmissions being received over the first carrier.

In some examples, UE 115-b determining the second operation state may include UE 115-b determining whether to map the one or more second downlink transmissions to the second operation state according to a carrier on which the one or more second downlink transmissions are scheduled or configured or according to a number of antenna ports used for reception of the one or more second downlink transmissions based on a channel type associated with the one or more second downlink transmissions. In some examples, the channel type may be associated with reception of a CSI-RS. In some such examples, UE 115-b may map the one or more second downlink transmissions to the second operation state according to the carrier based on the channel type being associated with reception of the channel state information reference signal.

At 525, base station 105-b may transmit the one or more second downlink transmissions. UE 115-b may receive the one or more second downlink transmissions based on identifying that the switching duration has occurred. In some examples, base station 105-b may transmit the one or more second downlink transmissions based on the determined switching duration (e.g., determined at 505) .

In some examples (e.g., prior to 510) , UE 115-b may transmit an indication to base station 105-b of whether a capability is supported for determining the second operation state according to which carrier the one or more second downlink transmissions are received on, according to a number of antenna ports used for reception of the one or more second downlink transmissions, or both. In some examples, base station 105-b may transmit an indication to determine the second operation state according to which carrier the one or more second downlink transmissions are received on or according to the number of antenna ports. The indication to determine the second operation state according to which carrier the one or more second downlink transmissions are received or on the number of antenna ports may be received via RRC signaling.

In some examples (e.g., prior to 520) , base station 105-b may transmit an indication of a location of the switching duration to UE 115-b. UE 115-b may determine that the switching duration is on a first carrier or a second carrier based on receiving the indication of the location. In some examples, the indication of the location may be received via RRC signaling.

In some examples, each of the one or more first downlink transmissions and the one or more second downlink transmissions may include a first downlink transmission on a first carrier, a second downlink transmission on a second carrier, or both. In some examples, the first carrier includes a supplementary downlink carrier of a serving cell and the second carrier includes a downlink carrier of the serving cell, the first carrier includes a first New Radio (NR) band and the second carrier includes a second NR band, or the first carrier includes an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (E-UTRA) carrier and the second carrier includes an NR carrier.

FIG. 6 shows a block diagram 600 of a device 605 that supports operation state determining and switching in accordance with aspects of the present disclosure. The device 605 may be an example of aspects of a UE 115 as described herein. The device 605 may include a receiver 610, a communication manager 615, and a transmitter 620. The device 605 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .

The receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to operation state determining and switching, etc. ) . Information may be passed on to other components of the device 605. The receiver 610 may be an example of aspects of the transceiver 915 described with reference to FIG. 9. The receiver 610 may utilize a single antenna or a set of antennas.

The communication manager 615 may receive one or more first downlink transmissions. The communication manager 615 may determine a first operation state and a second operation state, where the second operation state is for receiving one or more second downlink transmissions, where the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions. The communication manager 615 may identify, after receiving the one or more first downlink transmissions, that a switching duration has occurred based on the first operation state being different than the second operation state. The communication manager 615 may receive the one or more second downlink transmissions based on identifying that the switching duration has occurred. The communication manager 615 may be an example of aspects of the communication manager 910 described herein.

The communication manager 615, or its sub-components, may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 615, or its sub-components may be executed by a general-purpose processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

The communication manager 615, or its sub-components, may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components. In some examples, the communication manager 615, or its sub-components, may be a separate and distinct component in accordance with various aspects of the present disclosure. In some examples, the communication manager 615, or its sub-components, may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.

The transmitter 620 may transmit signals generated by other components of the device 605. In some examples, the transmitter 620 may be collocated with a receiver 610 in a transceiver module. For example, the transmitter 620 may be an example of aspects of the transceiver 915 described with reference to FIG. 9. The transmitter 620 may utilize a single antenna or a set of antennas.

FIG. 7 shows a block diagram 700 of a device 705 that supports operation state determining and switching in accordance with aspects of the present disclosure. The device 705 may be an example of aspects of a device 605, or a UE 115 as described herein. The device 705 may include a receiver 710, a communication manager 715, and a transmitter 735. The device 705 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .

The receiver 710 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to operation state determining and switching, etc. ) . Information may be passed on to other components of the device 705. The receiver 710 may be an example of aspects of the transceiver 915 described with reference to FIG. 9. The receiver 710 may utilize a single antenna or a set of antennas.

The communication manager 715 may be an example of aspects of the communication manager 615 as described herein. The communication manager 715 may include a downlink transmission receiver 720, an operation state determination component 725, and a switching duration component 730. The communication manager 715 may be an example of aspects of the communication manager 910 described herein.

The downlink transmission receiver 720 may receive one or more first downlink transmissions. The downlink transmission receiver 720 may receive one or more second downlink transmissions in a second operation state based on identifying that a switching duration has occurred.

The operation state determination component 725 may determine a first operation state and the second operation state, where the second operation state is for receiving the one or more second downlink transmissions, where the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions.

The switching duration component 730 may identify, after receiving the one or more first downlink transmissions, that the switching duration has occurred based on the first operation state being different than the second operation state.

The transmitter 735 may transmit signals generated by other components of the device 705. In some examples, the transmitter 735 may be collocated with a receiver 710 in a transceiver module. For example, the transmitter 735 may be an example of aspects of the transceiver 915 described with reference to FIG. 9. The transmitter 735 may utilize a single antenna or a set of antennas.

FIG. 8 shows a block diagram 800 of a communication manager 805 that supports operation state determining and switching in accordance with aspects of the present disclosure. The communication manager 805 may be an example of aspects of a communication manager 615, a communication manager 715, or a communication manager 910 described herein. The communication manager 805 may include a downlink transmission receiver 810, an operation state determination component 815, a switching duration component 820, a capability indication transmitter 825, an operation state determination indication receiver 830, and a switching duration location receiver 835. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .

The downlink transmission receiver 810 may receive one or more first downlink transmissions. In some examples, the downlink transmission receiver 810 may receive one or more second downlink transmissions in a second operation state based on identifying that a switching duration has occurred. In some examples, each of the one or more first downlink transmissions and the one or more second downlink transmissions include a first downlink transmission on a first carrier, a second downlink transmission on a second carrier, or both. In some examples, the first carrier includes a supplementary downlink carrier of a serving cell and the second carrier includes a downlink carrier of the serving cell, the first carrier includes a first New Radio (NR) band and the second carrier includes a second NR band, or the first carrier includes an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (E-UTRA) carrier and the second carrier includes an NR carrier.

The operation state determination component 815 may determine a first operation state and a second operation state, where the second operation state is for receiving one or more second downlink transmissions, where the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions. In some examples, determining the first operation state and the second operation state may be based on which one or more carriers the one or more first downlink transmissions and the one or more second downlink transmissions, respectively, are transmitted on. In some examples, the first operation state being different than the second operation state may be based on a first carrier on which the one or more first downlink transmissions are transmitted being different than a second carrier on which the one or more second downlink transmissions are transmitted.

In some examples, the operation state determination component 815 determining the second operation state may include mapping the one or more second downlink transmissions to the second operation state based on a first number of antenna ports for receiving the one or more second downlink transmissions over a first carrier and a second number of antenna ports for receiving the one or more second downlink transmissions over a second carrier. In some examples, the operation state determination component 815 determining the first operation state may include mapping the one or more first downlink transmissions to the first operation state based on a third number of antenna ports for receiving the one or more first downlink transmissions over the first carrier and a fourth number of antenna ports for receiving the one or more first downlink transmissions.

In some examples, the operation state determination component 815 mapping the one or more second downlink transmissions to the second operation state may include selecting the second operation state based on a first number of receivers being greater than or equal to the first number of antenna ports scheduled or configured on the first carrier of the one of the one or more second downlink transmissions and a second number of receivers being greater than or equal to the second number of antenna ports scheduled or configured on the second carrier of the one or more second downlink transmissions. In some examples, a mapping between the second operation state and the first and second antenna ports may be configured via radio resource control signaling or medium access control (MAC) control element signaling.

In some examples, the operation state determination component 815 determining the second operation state may include the operation state determination component 815 determining whether to map the one or more second downlink transmissions to the second operation state according to a carrier on which the one or more second downlink transmissions are scheduled or configured or according to a number of antenna ports used for reception of the one or more second downlink transmissions based on a channel type associated with the one or more second downlink transmissions. In some examples, the channel type may be associated with reception of a CSI-RS. In some such examples, the operation state determination component 815 may map the one or more second downlink transmissions to the second operation state according to the carrier based on the channel type being associated with reception of the channel state information reference signal.

In some examples, the first operation state may be based on the one or more first downlink transmissions. The switching duration component 820 may identify, after receiving the one or more first downlink transmissions, that a switching duration has occurred based on the first operation state being different than the second operation state. In some examples, the switching duration component 820 may switch between a first receiver and a second receiver according to the switching duration no more than once per slot. In some examples, the switching duration component 820 may determine that a first subcarrier spacing associated with a first carrier is different than a second subcarrier spacing associated with a second carrier, where determining to switch according to the switching duration no more than once per slot is based on a carrier of the first carrier and the second subcarrier whose subcarrier spacing is larger.

In some examples, the switching duration component 820 may determine that the switching duration is on a first carrier or a second carrier based on receiving an indication of a location of the switching duration. In some cases, each of the first and second operation states include a first number of receiving chains on a first carrier and a second number of receiving chains on a second carrier, where the first operation state being different than the second operation state includes the first number of receiving chains on the first carrier in the first operation state being different than the first number of receiving chains on the first carrier in the second operation state, the second number of receiving chains on the second carrier in the first operation state being different than the second number of receiving chains on the second carrier in the second operation state, or both. In some examples, the switching duration is located on a first carrier based on the first carrier spanning a lower range of frequencies than a second carrier. In some examples, the switching duration component 820 may determine that the location of the switching duration is at the end of a slot based on receiving the indication of the location.

In some examples, the switching duration is located on a first carrier based on the first carrier being associated with a fewer number of receivers than a second carrier. In some examples, one of the one or more first downlink transmissions and the one or more second downlink transmissions are received over a first carrier and other of the one or more first downlink transmissions and the one or more second downlink transmissions are received over the first carrier and a second carrier, where the switching duration is located on the first carrier based on the one or more first downlink transmissions and the one or more second downlink transmissions being received over the first carrier. In some examples, the switching duration component 820 may determine a downlink transmission interruption during the switching duration, where receiving the one or more second downlink transmissions (e.g., by downlink transmission receiver 810) is based on determining the downlink transmission interruption.

The capability indication transmitter 825 may transmit an indication of whether a capability is supported for determining the second operation state according to which carrier the one or more second downlink transmissions are received on, according to a number of antenna ports used for reception of the one or more second downlink transmissions, or both.

The operation state determination indication receiver 830 may receive an indication to determine the second operation state according to which carrier the one or more second downlink transmissions are received on or according to the number of antenna ports. In some examples, the indication to determine the second operation state according to which carrier the one or more second downlink transmissions are received on or the number of antenna ports is received via radio resource control signaling.

The switching duration location receiver 835 may receive an indication of a location of the switching duration. The indication of the location may be received via radio resource control signaling.

FIG. 9 shows a diagram of a system 900 including a device 905 that supports operation state determining and switching in accordance with aspects of the present disclosure. The device 905 may be an example of or include the components of device 605, device 705, or a UE 115 as described herein. The device 905 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communication manager 910, a transceiver 915, an antenna 920, memory 925, and a processor 935. These components may be in electronic communication via one or more buses (e.g., bus 940) .

The communication manager 910 may receive one or more first downlink transmissions. The communication manager 910 may determine a first operation state and a second operation state, where the second operation state is for receiving one or more second downlink transmissions, where the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions. The communication manager 910 may identify, after receiving the one or more first downlink transmissions, that a switching duration has occurred based on the first operation state being different than the second operation state. The communication manager 910 may receive the one or more second downlink transmissions based on identifying that the switching duration has occurred.

The transceiver 915 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above. For example, the transceiver 915 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 915 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.

In some cases, the wireless device may include a single antenna 920. However, in some cases the device may have more than one antenna 920, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

The memory 925 may include random-access memory (RAM) and read-only memory (ROM) . The memory 925 may store computer-readable, computer-executable code 930 including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, the memory 925 may contain, among other things, a basic input/output system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The code 930 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications. The code 930 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code 930 may not be directly executable by the processor 935 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.

The processor 935 may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some cases, the processor 935 may be configured to operate a memory array using a memory controller. In other cases, a memory controller may be integrated into the processor 935. The processor 935 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 925) to cause the device 905 to perform various functions (e.g., functions or tasks supporting operation state determining and switching) .

FIG. 10 shows a block diagram 1000 of a device 1005 that supports operation state determining and switching in accordance with aspects of the present disclosure. The device 1005 may be an example of aspects of a base station 105 as described herein. The device 1005 may include a receiver 1010, a communication manager 1015, and a transmitter 1020. The device 1005 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .

The receiver 1010 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to operation state determining and switching, etc. ) . Information may be passed on to other components of the device 1005. The receiver 1010 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13. The receiver 1010 may utilize a single antenna or a set of antennas.

The communication manager 1015 may determine a switching duration that occurs based on a first operation state of a UE being different than a second operation state of the UE, where the first operation state is associated with one or more first downlink transmissions and the second operation state is associated with one or more second downlink transmissions. The communication manager 1015 may transmit, to the UE, the one or more first downlink transmissions and the one or more second downlink transmissions based on the determined switching duration. The communication manager 1015 may be an example of aspects of the communication manager 1310 described herein.

The communication manager 1015, or its sub-components, may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 1015, or its sub-components may be executed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC) , a FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

The communication manager 1015, or its sub-components, may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components. In some examples, the communication manager 1015, or its sub-components, may be a separate and distinct component in accordance with various aspects of the present disclosure. In some examples, the communication manager 1015, or its sub-components, may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.

The transmitter 1020 may transmit signals generated by other components of the device 1005. In some examples, the transmitter 1020 may be collocated with a receiver 1010 in a transceiver module. For example, the transmitter 1020 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13. The transmitter 1020 may utilize a single antenna or a set of antennas.

FIG. 11 shows a block diagram 1100 of a device 1105 that supports operation state determining and switching in accordance with aspects of the present disclosure. The device 1105 may be an example of aspects of a device 1005, or a base station 105 as described herein. The device 1105 may include a receiver 1110, a communication manager 1115, and a transmitter 1130. The device 1105 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .

The receiver 1110 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to operation state determining and switching, etc. ) . Information may be passed on to other components of the device 1105. The receiver 1110 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13. The receiver 1110 may utilize a single antenna or a set of antennas.

The communication manager 1115 may be an example of aspects of the communication manager 1015 as described herein. The communication manager 1115 may include a switching duration determination component 1120 and a downlink transmission transmitter 1125. The communication manager 1115 may be an example of aspects of the communication manager 1310 described herein.

The switching duration determination component 1120 may determine a switching duration that occurs based on a first operation state of a UE being different than a second operation state of the UE, where the first operation state is associated with one or more first downlink transmissions and the second operation state is associated with one or more second downlink transmissions.

The downlink transmission transmitter 1125 may transmit, to the UE, the one or more first downlink transmissions and the one or more second downlink transmissions based on the determined switching duration.

The transmitter 1130 may transmit signals generated by other components of the device 1105. In some examples, the transmitter 1130 may be collocated with a receiver 1110 in a transceiver module. For example, the transmitter 1130 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13. The transmitter 1130 may utilize a single antenna or a set of antennas.

FIG. 12 shows a block diagram 1200 of a communication manager 1205 that supports operation state determining and switching in accordance with aspects of the present disclosure. The communication manager 1205 may be an example of aspects of a communication manager 1015, a communication manager 1115, or a communication manager 1310 described herein. The communication manager 1205 may include a switching duration determination component 1210, a downlink transmission transmitter 1215, a capability indication receiver 1220, an operation state determination indication transmitter 1225, and a switching duration location transmitter 1230. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .

The switching duration determination component 1210 may determine a switching duration that occurs based on a first operation state of a UE being different than a second operation state of the UE, where the first operation state is associated with one or more first downlink transmissions and the second operation state is associated with one or more second downlink transmissions. In some examples, the switching duration is located on a first carrier based on the first carrier spanning a lower range of frequencies than a second carrier. In some examples, the switching duration is located on a first carrier based on the first carrier being associated with a fewer number of receivers than a second carrier. In some examples, one of the one or more first downlink transmissions and the one or more second downlink transmissions are received over a first carrier and other of the one or more first downlink transmissions and the one or more second downlink transmissions are received over the first carrier and a second carrier, where the switching duration is located on the first carrier based at least in part on the one or more first downlink transmissions and the one or more second downlink transmissions being received over the first carrier.

In some examples, the switching duration determination component 1210 may determine the first operation state and the second operation state based on which one or more carriers the one or more first downlink transmissions and the one or more second downlink transmissions, respectively, are transmitted on. In some examples, the first operation being different than the second operation state is based on a first carrier on which the one or more first downlink transmissions are transmitted being different than a second carrier on which the one or more second downlink transmissions are transmitted.

In some examples, the switching duration determination component 1210 may map the one or more second downlink transmissions to the second operation state based at least in part on a first number of antenna ports for receiving the one or more second downlink transmissions over a first carrier and a second number of antenna ports for receiving the one or more second downlink transmissions over a second carrier. In some examples, the switching duration determination component 1210 may map the one or more first downlink transmissions to the first operation state based at least in part on a third number of antenna ports for receiving the one or more first downlink transmissions over the first carrier and a fourth number of antenna ports for receiving the one or more first downlink transmissions. In some examples, the switching duration determination component 1210 mapping the one or more second downlink transmissions to the second operation state may involve the switching duration determination component 1210 selecting the second operation state based at least in part on a first number of receivers being greater than or equal to the first number of antenna ports scheduled or configured on the first carrier of the one of the one or more second downlink transmissions and a second number of receivers being greater than or equal to the second number of antenna ports scheduled or configured on the second carrier of the one or more second downlink transmissions. In some examples, a mapping between the second operation state and the first and second antenna ports is configured via radio resource control signaling or medium access control (MAC) control element signaling.

In some examples, the switching duration determination component 1210 may determine whether to map the one or more second downlink transmissions to the second operation state according to a carrier on which the one or more second downlink transmissions are scheduled or configured or according to a number of antenna ports used for reception of the one or more second downlink transmissions based on a channel type associated with the one or more second downlink transmissions. In some examples, the channel type may be associated with communication of a channel state information reference signal. In such examples, the switching duration determination component 1210 may map the one or more second downlink transmissions to the second operation state according to the carrier based at least in part on the channel type being associated with communication of the channel state information reference signal.

The downlink transmission transmitter 1215 may transmit, to the UE, the one or more first downlink transmissions and the one or more second downlink transmissions based on the determined switching duration. In some examples, each of the one or more first downlink transmissions and the one or more second downlink transmissions may include a first downlink transmission on a first carrier, a second downlink transmission on a second carrier, or both. In some examples, the downlink transmission transmitter 1215 may refrain from transmitting the one or more first downlink transmissions and the one or more second downlink transmissions during the determined switching duration.

In some cases, the first carrier includes a supplementary downlink carrier of a serving cell and the second carrier includes a downlink carrier of the serving cell, the first carrier includes a first New Radio (NR) band and the second carrier includes a second NR band, or the first carrier includes an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (E-UTRA) carrier and the second carrier includes an NR carrier.

The capability indication receiver 1220 may receive an indication of whether a capability is supported for determining the second operation state according to which carrier the one or more second downlink transmissions are received on, according to a number of antenna ports used for reception of the one or more second downlink transmissions, or both.

The operation state determination indication transmitter 1225 may transmit an indication to determine the second operation state according to which carrier the one or more second downlink transmissions are received on or according to the number of antenna ports. In some examples, the indication to determine the second operation state according to which carrier the one or more second downlink transmissions are received on or the number of antenna ports is transmitted via radio resource control signaling.

The switching duration location transmitter 1230 may transmit an indication of a location of the switching duration, where transmitting the one or more first downlink transmissions and the one or more second downlink transmissions is based on the location of the switching duration. In some examples, the indication of the location is transmitted via radio resource control signaling.

FIG. 13 shows a diagram of a system 1300 including a device 1305 that supports operation state determining and switching in accordance with aspects of the present disclosure. The device 1305 may be an example of or include the components of device 1005, device 1105, or a base station 105 as described herein. The device 1305 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communication manager 1310, a network communications manager 1315, a transceiver 1320, an antenna 1325, memory 1330, a processor 1340, and an inter-station communications manager 1345. These components may be in electronic communication via one or more buses (e.g., bus 1350) .

The communication manager 1310 may determine a switching duration that occurs based on a first operation state of a UE being different than a second operation state of the UE, where the first operation state is associated with one or more first downlink transmissions and the second operation state is associated with one or more second downlink transmissions. The communication manager 1310 may transmit, to the UE, the one or more first downlink transmissions and the one or more second downlink transmissions based on the determined switching duration.

The network communications manager 1315 may manage communications with the core network (e.g., via one or more wired backhaul links) . For example, the network communications manager 1315 may manage the transfer of data communications for client devices, such as one or more UEs 115.

The transceiver 1320 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above. For example, the transceiver 1320 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1320 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.

In some cases, the wireless device may include a single antenna 1325. However, in some cases the device may have more than one antenna 1325, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

The memory 1330 may include RAM and ROM. The memory 1330 may store computer-readable, computer-executable code 1335 including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, the memory 1330 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The code 1335 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications. The code 1335 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code 1335 may not be directly executable by the processor 1340 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.

The processor 1340 may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some cases, the processor 1340 may be configured to operate a memory array using a memory controller. In other cases, a memory controller may be integrated into the processor 1340. The processor 1340 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1330) to cause the device 1305 to perform various functions (e.g., functions or tasks supporting operation state determining and switching) .

The inter-station communications manager 1345 may manage communications with other base station 105, and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other base stations 105. For example, the inter-station communications manager 1345 may coordinate scheduling for transmissions to UEs 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communications manager 1345 may provide an X2 interface within an LTE/LTE-A wireless communication network technology to provide communication between base stations 105.

FIG. 14 shows a flowchart illustrating a method 1400 that supports operation state determining and switching in accordance with aspects of the present disclosure. The operations of method 1400 may be implemented by a UE 115 or its components as described herein. For example, the operations of method 1400 may be performed by a communication manager as described with reference to FIGs. 6 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, a UE may perform aspects of the described functions using special-purpose hardware.

At 1405, the UE may receive one or more first downlink transmissions. The operations of 1405 may be performed according to the methods described herein. In some examples, aspects of the operations of 1505 may be performed by a downlink transmission receiver as described with reference to FIGs. 6 through 9.

At 1410, the UE may determine a first operation state and a second operation state based on which one or more carriers the one or more first downlink transmissions and one or more second downlink transmissions, respectively, are transmitted on, where the second operation state is for receiving the one or more second downlink transmissions, where the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions. The operations of 1410 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be performed by an operation state determination component as described with reference to FIGs. 6 through 9.

At 1415, the UE may identify, after receiving the one or more first downlink transmissions, that a switching duration has occurred based on the first operation state being different than the second operation state. The operations 1415 may be performed according to the methods described herein. In some examples, aspects of the operations of 1415 may be performed by a switching duration component as described with reference to FIGs. 6 through 9.

At 1420, the UE may receive the one or more second downlink transmissions based on identifying that the switching duration has occurred. The operations of 1420 may be performed according to the methods described herein. In some examples, aspects of the operations of 1420 may be performed by a downlink transmission receiver as described with reference to FIGs. 6 through 9.

FIG. 15 shows a flowchart illustrating a method 1500 that supports operation state determining and switching in accordance with aspects of the present disclosure. The operations of method 1500 may be implemented by a UE 115 or its components as described herein. For example, the operations of method 1500 may be performed by a communication manager as described with reference to FIGs. 6 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, a UE may perform aspects of the described functions using special-purpose hardware.

At 1505, the UE may receive one or more first downlink transmissions. The operations of 1505 may be performed according to the methods described herein. In some examples, aspects of the operations of 1505 may be performed by a downlink transmission receiver as described with reference to FIGs. 6 through 9.

At 1510, the UE may determine a first operation state and a second operation state, where the second operation state is for receiving one or more second downlink transmissions, where the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions. The operations of 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be performed by an operation state determination component as described with reference to FIGs. 6 through 9.

At 1515, the UE may identify, after receiving the one or more first downlink transmissions, that a switching duration has occurred based on the first operation state being different than the second operation state. The operations of 1515 may be performed according to the methods described herein. In some examples, aspects of the operations of 1515 may be performed by a switching duration component as described with reference to FIGs. 6 through 9.

At 1520, the UE may receive the one or more second downlink transmissions one or more second downlink transmissions based on identifying that the switching duration has occurred. The operations of 1520 may be performed according to the methods described herein. In some examples, aspects of the operations of 1520 may be performed by a downlink transmission receiver as described with reference to FIGs. 6 through 9.

FIG. 16 shows a flowchart illustrating a method 1600 that supports operation state determining and switching in accordance with aspects of the present disclosure. The operations of method 1600 may be implemented by a UE 115 or its components as described herein. For example, the operations of method 1600 may be performed by a communication manager as described with reference to FIGs. 6 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, a UE may perform aspects of the described functions using special-purpose hardware.

At 1605, the UE may receive one or more first downlink transmissions. The operations of 1605 may be performed according to the methods described herein. In some examples, aspects of the operations of 1605 may be performed by a downlink transmission receiver as described with reference to FIGs. 6 through 9.

At 1610, the UE may determine a first operation state. The operations of 1610 may be performed according to the methods described herein. In some examples, aspects of the operations of 1610 may be performed by an operation state determination component as described with reference to FIGs. 6 through 9.

At 1615, the UE may map one or more second downlink transmissions to a second operation state based on a first number of antenna ports for receiving the one or more second downlink transmissions over a first carrier and a second number of antenna ports for receiving the one or more second downlink transmissions over a second carrier, where the second operation state is for receiving one or more second downlink transmissions, and where the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions. The operations of 1615 may be performed according to the methods described herein. In some examples, aspects of the operations of 1615 may be performed by an operation state determination component as described with reference to FIGs. 6 through 9.

At 1620, the UE may identify, after receiving the one or more first downlink transmissions, that a switching duration has occurred based on the first operation state being different than the second operation state The operations of 1620 may be performed according to the methods described herein. In some examples, aspects of the operations of 1620 may be performed by a switching duration component as described with reference to FIGs. 6 through 9.

At 1625, the UE may receive the one or more second downlink transmissions based on identifying that the switching duration has occurred. The operations of 1625 may be performed according to the methods described herein. In some examples, aspects of the operations of 1625 may be performed by a downlink transmission receiver as described with reference to FIGs. 6 through 9.

FIG. 17 shows a flowchart illustrating a method 1700 that supports operation state determining and switching in accordance with aspects of the present disclosure. The operations of method 1700 may be implemented by a base station 105 or its components as described herein. For example, the operations of method 1700 may be performed by a communication manager as described with reference to FIGs. 10 through 13. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the described functions. Additionally or alternatively, a base station may perform aspects of the described functions using special-purpose hardware.

At 1705, the base station may determine a switching duration that occurs based on a first operation state of a UE being different than a second operation state of the UE, where the first operation state is associated with one or more first downlink transmissions and the second operation state is associated with one or more second downlink transmissions. The operations of 1705 may be performed according to the methods described herein. In some examples, aspects of the operations of 1705 may be performed by a switching duration determination component as described with reference to FIGs. 10 through 13.

At 1710, the base station may transmit, to the UE, the one or more first downlink transmissions and the one or more second downlink transmissions based on the determined switching duration. The operations of 1710 may be performed according to the methods described herein. In some examples, aspects of the operations of 1710 may be performed by a downlink transmission transmitter as described with reference to FIGs. 10 through 13.

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

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

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

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

The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.

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

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

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

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

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

Claims

A method for wireless communication, comprising:

receiving one or more first downlink transmissions;

determining a first operation state and a second operation state, wherein the second operation state is for receiving one or more second downlink transmissions, wherein the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions;

identifying, after receiving the one or more first downlink transmissions, that a switching duration has occurred based at least in part on the first operation state being different than the second operation state; and

receiving the one or more second downlink transmissions based at least in part on identifying that the switching duration has occurred.
The method of claim 1, further comprising:

determining a downlink transmission interruption during the switching duration, wherein receiving the one or more second downlink transmissions is based at least in part on determining the downlink transmission interruption.
The method of claim 1, wherein determining the first operation state and the second operation state is based at least in part on which one or more carriers the one or more first downlink transmissions and the one or more second downlink transmissions, respectively, are transmitted on.
The method of claim 3, wherein the first operation state being different than the second operation state is based at least in part on a first carrier on which the one or more first downlink transmissions are transmitted being different than a second carrier on which the one or more second downlink transmissions are transmitted.
The method of claim 1, wherein determining the second operation state comprises:

mapping the one or more second downlink transmissions to the second operation state based at least in part on a first number of antenna ports for receiving the one or more second downlink transmissions over a first carrier and a second number of antenna ports for receiving the one or more second downlink transmissions over a second carrier.
The method of claim 5, wherein determining the first operation state comprises:

mapping the one or more first downlink transmissions to the first operation state based at least in part on a third number of antenna ports for receiving the one or more first downlink transmissions over the first carrier and a fourth number of antenna ports for receiving the one or more first downlink transmissions.
The method of claim 5, wherein mapping the one or more second downlink transmissions to the second operation state comprises:

selecting the second operation state based at least in part on a first number of receivers being greater than or equal to the first number of antenna ports scheduled or configured on the first carrier of the one of the one or more second downlink transmissions and a second number of receivers being greater than or equal to the second number of antenna ports scheduled or configured on the second carrier of the one or more second downlink transmissions.
The method of claim 5, wherein a mapping between the second operation state and the first and second antenna ports is configured via radio resource control signaling or medium access control (MAC) control element signaling.
The method of claim 1, wherein determining the second operation state comprises:

determining whether to map the one or more second downlink transmissions to the second operation state according to a carrier on which the one or more second downlink transmissions are scheduled or configured or according to a number of antenna ports used for reception of the one or more second downlink transmissions based at least in part on a channel type associated with the one or more second downlink transmissions.
The method of claim 9, wherein the channel type is associated with reception of a channel state information reference signal, the method further comprising:

mapping the one or more second downlink transmissions to the second operation state according to the carrier based at least in part on the channel type being associated with reception of the channel state information reference signal.
The method of claim 1, further comprising:

transmitting an indication of whether a capability is supported for determining the second operation state according to which carrier the one or more second downlink transmissions are received on, according to a number of antenna ports used for reception of the one or more second downlink transmissions, or both; and

receiving an indication to determine the second operation state according to which carrier the one or more second downlink transmissions are received on or according to the number of antenna ports.
The method of claim 11, wherein the indication to determine the second operation state according to which carrier the one or more second downlink transmissions are received on or the number of antenna ports is received via radio resource control signaling.
The method of claim 1, further comprising:

switching between a first receiver and a second receiver according to the switching duration no more than once per slot.
The method of claim 13, further comprising:

determining that a first subcarrier spacing associated with a first carrier is different than a second subcarrier spacing associated with a second carrier, wherein determining to switch according to the switching duration no more than once per slot is based at least in part on a carrier of the first carrier and the second subcarrier whose subcarrier spacing is larger.
The method of claim 1, further comprising:

receiving an indication of a location of the switching duration; and

determining that the switching duration is on a first carrier or a second carrier based at least in part on receiving the indication of the location.
The method of claim 15, further comprising:

determining that the location of the switching duration is at the end of a slot based at least in part on receiving the indication of the location.
The method of claim 15, wherein the indication of the location is received via radio resource control signaling.
The method of claim 1, wherein each of the one or more first downlink transmissions and the one or more second downlink transmissions comprise a first downlink transmission on a first carrier, a second downlink transmission on a second carrier, or both.
The method of claim 18, wherein the first carrier comprises a supplementary downlink carrier of a serving cell and the second carrier comprises a downlink carrier of the serving cell, the first carrier comprises a first New Radio (NR) band and the second carrier comprises a second NR band, or the first carrier comprises an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (E-UTRA) carrier and the second carrier comprises an NR carrier.
The method of claim 1, wherein each of the first and second operation states comprise a first number of receiving chains on a first carrier and a second number of receiving chains on a second carrier, and wherein the first operation state being different than the second operation state comprises the first number of receiving chains on the first carrier in the first operation state being different than the first number of receiving chains on the first carrier in the second operation state, the second number of receiving chains on the second carrier in the first operation state being different than the second number of receiving chains on the second carrier in the second operation state, or both.
The method of claim 1, wherein determining the first operation state is based at least in part on the one or more first downlink transmissions.
The method of claim 1, wherein the switching duration is located on a first carrier based at least in part on the first carrier spanning a lower range of frequencies than a second carrier.
The method of claim 1, wherein the switching duration is located on a first carrier based at least in part on the first carrier being associated with a fewer number of receivers than a second carrier.
The method of claim 1, wherein one of the one or more first downlink transmissions and the one or more second downlink transmissions are received over a first carrier and other of the one or more first downlink transmissions and the one or more second downlink transmissions are received over the first carrier and a second carrier, and wherein the switching duration is located on the first carrier based at least in part on the one or more first downlink transmissions and the one or more second downlink transmissions being received over the first carrier.
A method for wireless communication, comprising:

determining a switching duration that occurs based at least in part on a first operation state of a user equipment (UE) being different than a second operation state of the UE, wherein the first operation state is associated with one or more first downlink transmissions and the second operation state is associated with one or more second downlink transmissions; and

transmitting, to the UE, the one or more first downlink transmissions and the one or more second downlink transmissions based at least in part on the determined switching duration.
The method of claim 25, further comprising:

refraining from transmitting the one or more first downlink transmissions and the one or more second downlink transmissions during the determined switching duration.
The method of claim 25, further comprising:

determining the first operation state and the second operation state based at least in part on which one or more carriers the one or more first downlink transmissions and the one or more second downlink transmissions, respectively, are transmitted on.
The method of claim 27, wherein the first operation being different than the second operation state is based at least in part on a first carrier on which the one or more first downlink transmissions are transmitted being different than a second carrier on which the one or more second downlink transmissions are transmitted.
The method of claim 25, further comprising:

mapping the one or more second downlink transmissions to the second operation state based at least in part on a first number of antenna ports for receiving the one or more second downlink transmissions over a first carrier and a second number of antenna ports for receiving the one or more second downlink transmissions over a second carrier.
The method of claim 29, further comprising:

mapping the one or more first downlink transmissions to the first operation state based at least in part on a third number of antenna ports for receiving the one or more first downlink transmissions over the first carrier and a fourth number of antenna ports for receiving the one or more first downlink transmissions.
The method of claim 29, wherein mapping the one or more second downlink transmissions to the second operation state comprises:

selecting the second operation state based at least in part on a first number of receivers being greater than or equal to the first number of antenna ports scheduled or configured on the first carrier of the one of the one or more second downlink transmissions and a second number of receivers being greater than or equal to the second number of antenna ports scheduled or configured on the second carrier of the one or more second downlink transmissions.
The method of claim 29, wherein a mapping between the second operation state and the first and second antenna ports is configured via radio resource control signaling or medium access control (MAC) control element signaling.
The method of claim 25, further comprising:

determining whether to map the one or more second downlink transmissions to the second operation state according to a carrier on which the one or more second downlink transmissions are scheduled or configured or according to a number of antenna ports used for reception of the one or more second downlink transmissions based at least in part on a channel type associated with the one or more second downlink transmissions.
The method of claim 33, wherein the channel type is associated with communication of a channel state information reference signal, the method further comprising:

mapping the one or more second downlink transmissions to the second operation state according to the carrier based at least in part on the channel type being associated with communication of the channel state information reference signal.
The method of claim 25, further comprising:

receiving an indication of whether a capability is supported for determining the second operation state according to which carrier the one or more second downlink transmissions are received on, according to a number of antenna ports used for reception of the one or more second downlink transmissions, or both; and

transmitting an indication to determine the second operation state according to which carrier the one or more second downlink transmissions are received on or according to the number of antenna ports.
The method of claim 35, wherein the indication to determine the second operation state according to which carrier the one or more second downlink transmissions are received on or the number of antenna ports is transmitted via radio resource control signaling.
The method of claim 25, further comprising:

transmitting an indication of a location of the switching duration, wherein transmitting the one or more first downlink transmissions and the one or more second downlink transmissions is based at least in part on the location of the switching duration.
The method of claim 37, wherein the indication of the location is transmitted via radio resource control signaling.
The method of claim 25, wherein each of the one or more first downlink transmissions and the one or more second downlink transmissions comprise a first downlink transmission on a first carrier, a second downlink transmission on a second carrier, or both.
The method of claim 39, wherein the first carrier comprises a supplementary downlink carrier of a serving cell and the second carrier comprises a downlink carrier of the serving cell, the first carrier comprises a first New Radio (NR) band and the second carrier comprises a second NR band, or the first carrier comprises an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (E-UTRA) carrier and the second carrier comprises an NR carrier.
The method of claim 25, wherein the switching duration is located on a first carrier based at least in part on the first carrier spanning a lower range of frequencies than a second carrier.
The method of claim 25, wherein the switching duration is located on a first carrier based at least in part on the first carrier being associated with a fewer number of receivers than a second carrier.
The method of claim 25, wherein one of the one or more first downlink transmissions and the one or more second downlink transmissions are received over a first carrier and other of the one or more first downlink transmissions and the one or more second downlink transmissions are received over the first carrier and a second carrier, and wherein the switching duration is located on the first carrier based at least in part on the one or more first downlink transmissions and the one or more second downlink transmissions being received over the first carrier.
An apparatus for wireless communication, comprising:

a processor,

memory in electronic communication with the processor, and

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

receive one or more first downlink transmissions;

determine a first operation state and a second operation state, wherein the second operation state is for receiving one or more second downlink transmissions, wherein the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions;

identify, after receiving the one or more first downlink transmissions, that a switching duration has occurred based at least in part on the first operation state being different than the second operation state; and

receive the one or more second downlink transmissions based at least in part on identifying that the switching duration has occurred.
The apparatus of claim 44, wherein the instructions are further executable by the processor to cause the apparatus to:

determine a downlink transmission interruption during the switching duration, wherein receiving the one or more second downlink transmissions is based at least in part on determining the downlink transmission interruption.
The apparatus of claim 44, wherein determining the first operation state and the second operation state is based at least in part on which one or more carriers the one or more first downlink transmissions and the one or more second downlink transmissions, respectively, are transmitted on.
The apparatus of claim 46, wherein the first operation state being different than the second operation state is based at least in part on a first carrier on which the one or more first downlink transmissions are transmitted being different than a second carrier on which the one or more second downlink transmissions are transmitted.
The apparatus of claim 44, wherein the instructions to determine the second operation state are executable by the processor to cause the apparatus to:

map the one or more second downlink transmissions to the second operation state based at least in part on a first number of antenna ports for receiving the one or more second downlink transmissions over a first carrier and a second number of antenna ports for receiving the one or more second downlink transmissions over a second carrier.
The apparatus of claim 48, wherein the instructions to determine the first operation state are executable by the processor to cause the apparatus to:

map the one or more first downlink transmissions to the first operation state based at least in part on a third number of antenna ports for receiving the one or more first downlink transmissions over the first carrier and a fourth number of antenna ports for receiving the one or more first downlink transmissions.
The apparatus of claim 48, wherein the instructions to map the one or more second downlink transmissions to the second operation state are executable by the processor to cause the apparatus to:

select the second operation state based at least in part on a first number of receivers being greater than or equal to the first number of antenna ports scheduled or configured on the first carrier of the one of the one or more second downlink transmissions and a second number of receivers being greater than or equal to the second number of antenna ports scheduled or configured on the second carrier of the one or more second downlink transmissions.
The apparatus of claim 48, wherein a mapping between the second operation state and the first and second antenna ports is configured via radio resource control signaling or medium access control (MAC) control element signaling.
The apparatus of claim 44, wherein the instructions to determine the second operation state are executable by the processor to cause the apparatus to:

determine whether to map the one or more second downlink transmissions to the second operation state according to a carrier on which the one or more second downlink transmissions are scheduled or configured or according to a number of antenna ports used for reception of the one or more second downlink transmissions based at least in part on a channel type associated with the one or more second downlink transmissions.
The apparatus of claim 52, wherein the channel type is associated with reception of a channel state information reference signal, and wherein the instructions are further executable by the processor to cause the apparatus to:

map the one or more second downlink transmissions to the second operation state according to the carrier based at least in part on the channel type being associated with reception of the channel state information reference signal
The apparatus of claim 44, wherein the instructions are further executable by the processor to cause the apparatus to:

transmit an indication of whether a capability is supported for determining the second operation state according to which carrier the one or more second downlink transmissions are received on, according to a number of antenna ports used for reception of the one or more second downlink transmissions, or both; and

receive an indication to determine the second operation state according to which carrier the one or more second downlink transmissions are received on or according to the number of antenna ports.
The apparatus of claim 54, wherein the indication to determine the second operation state according to which carrier the one or more second downlink transmissions are received on or the number of antenna ports is received via radio resource control signaling.
The apparatus of claim 44, wherein the instructions are further executable by the processor to cause the apparatus to:

switch between a first receiver and a second receiver according to the switching duration no more than once per slot.
The apparatus of claim 56, wherein the instructions are further executable by the processor to cause the apparatus to:

determine that a first subcarrier spacing associated with a first carrier is different than a second subcarrier spacing associated with a second carrier, wherein determining to switch according to the switching duration no more than once per slot is based at least in part on a carrier of the first carrier and the second subcarrier whose subcarrier spacing is larger.
The apparatus of claim 44, wherein the instructions are further executable by the processor to cause the apparatus to:

receive an indication of a location of the switching duration; and

determine that the switching duration is on a first carrier or a second carrier based at least in part on receiving the indication of the location.
The apparatus of claim 58, wherein the instructions are further executable by the processor to cause the apparatus to:

determine that the location of the switching duration is at the end of a slot based at least in part on receiving the indication of the location.
The apparatus of claim 58, wherein the indication of the location is received via radio resource control signaling.
The apparatus of claim 44, wherein each of the one or more first downlink transmissions and the one or more second downlink transmissions comprise a first downlink transmission on a first carrier, a second downlink transmission on a second carrier, or both.
The apparatus of claim 61, wherein the first carrier comprises a supplementary downlink carrier of a serving cell and the second carrier comprises a downlink carrier of the serving cell, the first carrier comprises a first New Radio (NR) band and the second carrier comprises a second NR band, or the first carrier comprises an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (E-UTRA) carrier and the second carrier comprises an NR carrier.
The apparatus of claim 44, wherein each of the first and second operation states comprise a first number of receiving chains on a first carrier and a second number of receiving chains on a second carrier, and wherein the first operation state being different than the second operation state comprises the first number of receiving chains on the first carrier in the first operation state being different than the first number of receiving chains on the first carrier in the second operation state, the second number of receiving chains on the second carrier in the first operation state being different than the second number of receiving chains on the second carrier in the second operation state, or both.
The apparatus of claim 44, wherein determining the first operation state is based at least in part on the one or more first downlink transmissions.
The apparatus of claim 44, wherein the switching duration is located on a first carrier based at least in part on the first carrier spanning a lower range of frequencies than a second carrier.
The apparatus of claim 44, wherein the switching duration is located on a first carrier based at least in part on the first carrier being associated with a fewer number of receivers than a second carrier.
The apparatus of claim 44, wherein one of the one or more first downlink transmissions and the one or more second downlink transmissions are received over a first carrier and other of the one or more first downlink transmissions and the one or more second downlink transmissions are received over the first carrier and a second carrier, and wherein the switching duration is located on the first carrier based at least in part on the one or more first downlink transmissions and the one or more second downlink transmissions being received over the first carrier.
An apparatus for wireless communication, comprising:

a processor,

memory in electronic communication with the processor, and

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

determine a switching duration that occurs based at least in part on a first operation state of a user equipment (UE) being different than a second operation state of the UE, wherein the first operation state is associated with one or more first downlink transmissions and the second operation state is associated with one or more second downlink transmissions; and

transmit, to the UE, the one or more first downlink transmissions and the one or more second downlink transmissions based at least in part on the determined switching duration.
The apparatus of claim 68, wherein the instructions are further executable by the processor to cause the apparatus to:

refrain from transmitting the one or more first downlink transmissions and the one or more second downlink transmissions during the determined switching duration.
The apparatus of claim 68, wherein the instructions are further executable by the processor to cause the apparatus to:

determine the first operation state and the second operation state based at least in part on which one or more carriers the one or more first downlink transmissions and the one or more second downlink transmissions, respectively, are transmitted on.
The apparatus of claim 70, wherein the first operation being different than the second operation state is based at least in part on a first carrier on which the one or more first downlink transmissions are transmitted being different than a second carrier on which the one or more second downlink transmissions are transmitted.
The apparatus of claim 68, wherein the instructions are further executable by the processor to cause the apparatus to:

map the one or more second downlink transmissions to the second operation state based at least in part on a first number of antenna ports for receiving the one or more second downlink transmissions over a first carrier and a second number of antenna ports for receiving the one or more second downlink transmissions over a second carrier.
The apparatus of claim 72, wherein the instructions are further executable by the processor to cause the apparatus to:

map the one or more first downlink transmissions to the first operation state based at least in part on a third number of antenna ports for receiving the one or more first downlink transmissions over the first carrier and a fourth number of antenna ports for receiving the one or more first downlink transmissions.
The apparatus of claim 72, wherein the instructions to map the one or more second downlink transmissions to the second operation state comprises:

selecting the second operation state based at least in part on a first number of receivers being greater than or equal to the first number of antenna ports scheduled or configured on the first carrier of the one of the one or more second downlink transmissions and a second number of receivers being greater than or equal to the second number of antenna ports scheduled or configured on the second carrier of the one or more second downlink transmissions.
The apparatus of claim 72, wherein a mapping between the second operation state and the first and second antenna ports is configured via radio resource control signaling or medium access control (MAC) control element signaling.
The apparatus of claim 68, wherein the instructions are further executable by the processor to cause the apparatus to:

determine whether to map the one or more second downlink transmissions to the second operation state according to a carrier on which the one or more second downlink transmissions are scheduled or configured or according to a number of antenna ports used for reception of the one or more second downlink transmissions based at least in part on a channel type associated with the one or more second downlink transmissions.
The apparatus of claim 76, wherein the channel type is associated with communication of a channel state information reference signal, and wherein the instructions are further executable by the processor to cause the apparatus to:

map the one or more second downlink transmissions to the second operation state according to the carrier based at least in part on the channel type being associated with communication of the channel state information reference signal.
The apparatus of claim 68, wherein the instructions are further executable by the processor to cause the apparatus to:

receive an indication of whether a capability is supported for determining the second operation state according to which carrier the one or more second downlink transmissions are received on, according to a number of antenna ports used for reception of the one or more second downlink transmissions, or both; and

transmit an indication to determine the second operation state according to which carrier the one or more second downlink transmissions are received on or according to the number of antenna ports.
The apparatus of claim 78, wherein the indication to determine the second operation state according to which carrier the one or more second downlink transmissions are received on or the number of antenna ports is transmitted via radio resource control signaling.
The apparatus of claim 68, wherein the instructions are further executable by the processor to cause the apparatus to:

transmit an indication of a location of the switching duration, wherein transmitting the one or more first downlink transmissions and the one or more second downlink transmissions is based at least in part on the location of the switching duration.
The apparatus of claim 80, wherein the indication of the location is transmitted via radio resource control signaling.
The apparatus of claim 68, wherein each of the one or more first downlink transmissions and the one or more second downlink transmissions comprise a first downlink transmission on a first carrier, a second downlink transmission on a second carrier, or both.
The apparatus of claim 82, wherein the first carrier comprises a supplementary downlink carrier of a serving cell and the second carrier comprises a downlink carrier of the serving cell, the first carrier comprises a first New Radio (NR) band and the second carrier comprises a second NR band, or the first carrier comprises an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (E-UTRA) carrier and the second carrier comprises an NR carrier.
The apparatus of claim 68, wherein the switching duration is located on a first carrier based at least in part on the first carrier spanning a lower range of frequencies than a second carrier.
The apparatus of claim 68, wherein the switching duration is located on a first carrier based at least in part on the first carrier being associated with a fewer number of receivers than a second carrier.
The apparatus of claim 68, wherein one of the one or more first downlink transmissions and the one or more second downlink transmissions are received over a first carrier and other of the one or more first downlink transmissions and the one or more second downlink transmissions are received over the first carrier and a second carrier, and wherein the switching duration is located on the first carrier based at least in part on the one or more first downlink transmissions and the one or more second downlink transmissions being received over the first carrier.
An apparatus for wireless communication, comprising:

means for receiving one or more first downlink transmissions;

means for determining a first operation state and a second operation state, wherein the second operation state is for receiving one or more second downlink transmissions, wherein the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions;

means for identifying, after receiving the one or more first downlink transmissions, that a switching duration has occurred based at least in part on the first operation state being different than the second operation state; and

means for receiving the one or more second downlink transmissions based at least in part on identifying that the switching duration has occurred.
An apparatus for wireless communication, comprising:

means for determining a switching duration that occurs based at least in part on a first operation state of a user equipment (UE) being different than a second operation state of the UE, wherein the first operation state is associated with one or more first downlink transmissions and the second operation state is associated with one or more second downlink transmissions; and

means for transmitting, to the UE, the one or more first downlink transmissions and the one or more second downlink transmissions based at least in part on the determined switching duration.
A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to:

receive one or more first downlink transmissions;

determine a first operation state and a second operation state, wherein the second operation state is for receiving one or more second downlink transmissions, wherein the one or more second downlink transmissions are scheduled or configured to be received after the one or more first downlink transmissions;

identify, after receiving the one or more first downlink transmissions, that a switching duration has occurred based at least in part on the first operation state being different than the second operation state; and

receive the one or more second downlink transmissions based at least in part on identifying that the switching duration has occurred.
A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to:

determine a switching duration that occurs based at least in part on a first operation state of a user equipment (UE) being different than a second operation state of the UE, wherein the first operation state is associated with one or more first downlink transmissions and the second operation state is associated with one or more second downlink transmissions; and

transmit, to the UE, the one or more first downlink transmissions and the one or more second downlink transmissions based at least in part on the determined switching duration.