Methods, systems, and devices for wireless communications are described. Generally, a user equipment (UE) may estimate one or more channel availability parameter values. The UE may then select, based on a co-channel configuration indicating a relationship between channel availability parameter values and patterns of sidelink resources, a pattern of sidelink resources (e.g., LTE resources) on which to transmit NR packets. In some examples, a special UE may receive individual or aggregated reports of channel availability parameter values. The special UE may select a pattern of sidelink resources (e.g., LTE resources) on which one of the reporting UEs is permitted to transmit NR packets, and may transmit a message activating the pattern of sidelink resources to the reporting UE. The reporting UE may then use the activated sidelink LTE resources for transmitting NR packets according to the indicated pattern.

FIELD OF TECHNOLOGY

The following relates to wireless communications, including autonomous co-channel operations.

BACKGROUND

SUMMARY

The described techniques relate to improved methods, systems, devices, and apparatuses that support autonomous co-channel operations. Generally, a user equipment (UE) may perform its own measurements of one or more channel availability parameter values, or may receive reports from other UEs of channel availability parameter values, or both. The UE may then select, based on a co-channel configuration indicating a relationship between channel availability parameter values and patterns of sidelink resources, a pattern of sidelink resources (e.g., LTE resources) on which to transmit NR packets. In some examples, a special UE (e.g., a platoon or group leader, scheduling UE, roadside unit (RSU), or the like), may receive individual or aggregated reports of channel availability parameter values. The special UE may select a pattern of sidelink resources (e.g., LTE resources) on which one of the reporting UEs is permitted to transmit NR packets, and may transmit a message activating the pattern of sidelink resources to the reporting UE. The reporting UE may then use the activated sidelink LTE resources for transmitting NR packets according to the indicated pattern.

A method for wireless communications at a first user equipment (UE) is described. The method may include receiving a control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations, estimating one or more channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both, selecting a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values, and communicating on the set of sidelink resources according to the selected pattern of sidelink resources.

An apparatus for wireless communications at a first UE is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive a control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations, estimate one or more channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both, select a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values, and communicate on the set of sidelink resources according to the selected pattern of sidelink resources.

Another apparatus for wireless communications at a first UE is described. The apparatus may include means for receiving a control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations, means for estimating one or more channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both, means for selecting a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values, and means for communicating on the set of sidelink resources according to the selected pattern of sidelink resources.

A non-transitory computer-readable medium storing code for wireless communications at a first UE is described. The code may include instructions executable by a processor to receive a control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations, estimate one or more channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both, select a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values, and communicate on the set of sidelink resources according to the selected pattern of sidelink resources.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying, in the co-channel configuration, an indication of a relationship between a set of channel availability parameter values and a set of patterns of sidelink resources, where each pattern of sidelink resources of the set of patterns of sidelink resources may be associated with at least one channel availability parameter value.

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 estimated one or more channel availability parameter values to the set of channel availability parameter values, identifying the pattern of sidelink resources from the set of patterns of sidelink resources that may be associated with the estimated one or more channel availability parameter values based on the mapping, and selecting the pattern of sidelink resources based on identifying the pattern of sidelink resources from the set of patterns of sidelink resources.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication of the relationship includes a lookup table.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the channel availability parameter value includes an indication of quality of service, a priority level, a channel busy ratio, a penetration rate associated with the first radio access technology, the second radio access technology, or both, or any combination thereof.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the penetration rate includes an amount of UEs of a set of UEs operating according to the second radio access technology.

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 set of component carriers supporting the co-channel operations based on at least one sidelink parameter of the set of sidelink parameters, where the set of component carriers includes one or more of a first subset of component carriers associated with the first radio access technology indicated as shareable or un-sharable with the second radio access technology.

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 set of sidelink resource pools based on the determined set of component carriers, where the set of sidelink resource pools includes one or more of a first subset of sidelink resource pools associated with the first radio access technology nonoverlapping with a second subset of sidelink resource pools associated with the second radio access technology, or a third subset of sidelink resource pools associated with the first radio access technology overlapping with a fourth subset of sidelink resource pools associated with the second radio access technology.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, estimating the one or more channel availability parameter values may include operations, features, means, or instructions for performing one or more measurements on radio frequency resources associated with the first radio access technology for co-channel operation and detecting operations on radio frequency resources associated with the first radio access technology for the co-channel by devices using the first radio access technology, devices using the second radio access technology, or both.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, estimating the one or more channel availability parameter values may include operations, features, means, or instructions for receiving, from one or more additional UEs, channel availability report messages including channel availability parameter values, aggregating the received channel availability parameter values, and determining the one or more channel availability parameter values based on the aggregating.

A method for wireless communications at a second UE is described. The method may include receiving control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations, receiving a report message from a first UE, the report message including an indication of a set of channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both, selecting a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values, and transmitting, to the first UE, an indication of the pattern of sidelink resources associated with the one or more channel availability parameter values for communication by the first UE according to the pattern of sidelink resources.

An apparatus for wireless communications at a second UE is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations, receive a report message from a first UE, the report message including an indication of a set of channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both, select a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values, and transmit, to the first UE, an indication of the pattern of sidelink resources associated with the one or more channel availability parameter values for communication by the first UE according to the pattern of sidelink resources.

Another apparatus for wireless communications at a second UE is described. The apparatus may include means for receiving control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations, means for receiving a report message from a first UE, the report message including an indication of a set of channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both, means for selecting a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values, and means for transmitting, to the first UE, an indication of the pattern of sidelink resources associated with the one or more channel availability parameter values for communication by the first UE according to the pattern of sidelink resources.

A non-transitory computer-readable medium storing code for wireless communications at a second UE is described. The code may include instructions executable by a processor to receive control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations, receive a report message from a first UE, the report message including an indication of a set of channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both, select a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values, and transmit, to the first UE, an indication of the pattern of sidelink resources associated with the one or more channel availability parameter values for communication by the first UE according to the pattern of sidelink resources.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying, in the co-channel configuration, an indication of a relationship between a set of channel availability parameter values and a set of patterns of sidelink resources, where each pattern of sidelink resources of the set of patterns of sidelink resources may be associated with at least one channel availability parameter value.

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 estimated one or more channel availability parameter values to the set of channel availability parameter values, identifying the pattern of sidelink resources from the set of patterns of sidelink resources that may be associated with the one or more channel availability parameter values based on the mapping, and selecting the pattern of sidelink resources based on identifying the pattern of sidelink resources from the set of patterns of sidelink resources.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication of the relationship includes a lookup table.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the channel availability parameter value includes an indication of quality of service, a priority level, a channel busy ratio, a penetration rate associated with the first radio access technology, the second radio access technology, or both, or any combination thereof.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, receiving the report message may include operations, features, means, or instructions for receiving, on a sidelink control channel or sidelink shared channel, a set of media access control (MAC) control elements (CEs), each MAC-CE associated with one of the set of channel availability parameter values, where each of the channel availability parameter values may be associated with a respective UE of a set of UEs including the set of UEs.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, receiving the report message may include operations, features, means, or instructions for receiving, on a sidelink control channel or sidelink shared channel, a MAC control element (CE) including a set of fields, where each field of the set of fields includes an indication of a channel availability parameter value of the set of channel availability parameter values, where each of the channel availability parameter values may be associated with a respective UE of a set of UEs including the set of UEs.

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 set of component carriers supporting the co-channel operations based on at least one sidelink parameter of the set of sidelink parameters, where the set of component carriers includes one or more of a first subset of component carriers associated with the first radio access technology indicated as shareable or un-sharable with the second radio access technology.

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 set of sidelink resource pools based on the determined set of component carriers, where the set of sidelink resource pools includes one or more of a first subset of sidelink resource pools associated with the first radio access technology nonoverlapping with a second subset of sidelink resource pools associated with the second radio access technology, or a third subset of sidelink resource pools associated with the first radio access technology overlapping with a fourth subset of sidelink resource pools associated with the second radio access technology.

DETAILED DESCRIPTION

A wireless communications system may include communication devices, such as a user equipment (UE) or a base station (for example, an eNodeB (eNB), a next-generation NodeB or a giga-NodeB, any of which may be referred to as a gNB, or some other base station), that may support multiple radio access technologies. Examples of radio access technologies include 4G systems, such as long-term evolution (LTE) systems, and 5G systems, which may be referred to as new radio (NR) systems. In some cases, the UE may support various applications, such as vehicle-to-everything (V2X) applications that may result in wideband operations to meet low latency and high data rate requirements of the V2X applications. In some cases, radio frequency spectrum bands (e.g., resources) allocated for each radio access technology may be inadequate. For example, a limited radio frequency spectrum band may be allocated for NR V2X operations. It may be desirable to improve wideband operations for V2X applications when the UE supports multiple radio access technologies, such as 4G LTE and 5G NR. That is, it may be desirable to dynamically support system resource utilization on sidelink when the UE supports both NR V2X and LTE V2X operations.

Various aspects of present disclosure relate to enabling the UE to support dynamic co-channel operation between NR V2X and LTE V2X. In some examples, the co-channel operation between NR V2X and LTE V2X may be managed autonomously by one or more UEs. As such, the UE may identify a co-channel configuration to enable the co-channel operation between NR V2X and LTE V2X. For example, the UE may identify co-channel configuration information indicating a relationship between different patterns of sidelink resources of one radio access technology (e.g., LTE) and different channel availability parameter values (e.g., UE penetration rates, channel busy ratios, sidelink reference signal received power, quality of service such as latency or reliability or priority for different packets or channels, or the like). The relationship may be defined in one or more lookup tables (LUTs). In some examples, the co-channel configuration may include an indication of carriers supporting or not supporting the co-channel operation. The co-channel configuration may also include resource pools on the carriers supporting the co-channel operation. Additionally, or alternatively, the co-channel configuration may indicate measurement and reporting for the co-channel operation.

In some examples, a UE may perform its own measurements of channel availability parameter values, or may receive reports from other UEs of channel availability parameter values, or both. The UE may then select, based on the co-channel configuration information, a pattern of sidelink resources (e.g., LTE resources) on which to transmit NR packets.

In some examples, a special UE (e.g., a platoon or group leader, scheduling UE, roadside unit (RSU), or the like), may receive individual or aggregated reports of channel availability parameter values. The special UE may select a pattern of sidelink resources (e.g., LTE resources) on which one of the reporting UEs is permitted to transmit NR packets, and may transmit a message activating the pattern of sidelink resources to UEs in proximity. The UE may then use the activated sidelink LTE resources for transmitting NR packets according to the indicated pattern.

By enabling the communication devices (e.g., one or more of the special UE or the UE) to support co-channel operations for multiple radio access technologies, the communication devices may reduce power consumption. In addition, by enabling the communication devices (e.g., one or more of the special UE or the UE) to support co-channel operations for multiple radio access technologies, the communication devices may experience decreased latency and increase reliability for wireless communication, among other examples.

Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further illustrated by and described with reference to wireless communications systems, inter-RAT multi-carrier operation, and process flows. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to autonomous co-channel operations.

A UE115may perform its own measurements of one or more channel availability parameter values, or may receive reports from other UEs115of channel availability parameter values, or both. The UE115may then select, based on a co-channel configuration indicating a relationship between channel availability parameter values and patterns of sidelink resources, a pattern of sidelink resources (e.g., LTE resources) on which to transmit NR packets. In some examples, a special UE115(e.g., a platoon or group leader, scheduling UE115, roadside unit (RSU), or the like), may receive individual or aggregated reports of channel availability parameter values. The special UE115may select a pattern of sidelink resources (e.g., LTE resources) on which one of the UEs115is permitted to transmit NR packets, and may transmit a message activating the pattern of sidelink resources to the UE115. The UE115may then use the activated sidelink LTE resources for transmitting NR packets according to the indicated pattern.

FIG.2illustrates an example of a wireless communications system200that supports autonomous co-channel operations in accordance with aspects of the present disclosure. The wireless communications system200may implement aspects of the wireless communications system100or may be implemented by aspects of the wireless communications system100as described with reference toFIG.1. For example, the wireless communications system200may include a base station105-a, a UE115-athrough a UE115-f, which may be examples of corresponding devices as described with reference toFIG.1. In the example ofFIG.2, the wireless communications system200may be a V2X system and one or more of the base station105-aand the UE115-athrough the UE115-fmay supports V2X operations.

One or more of the base station105-aand the UE115-athrough the UE115-fmay be configured with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output communications, or beamforming, or any combination thereof. The antennas of one or more of the base station105-aand the UE115-athrough the UE115-fmay be located within one or more antenna arrays or antenna panels, which may support multiple-input multiple-output operations or transmit or receive beamforming. The base station105-amay have an antenna array with a number of rows and columns of antenna ports that the base station105-amay use to support beamforming of wireless communications with the UE115-athrough the UE115-f. Likewise, one or more of the UE115-athrough the UE115-fmay have one or more antenna arrays that may support various multiple-input multiple-output or beamforming operations. Additionally, or alternatively, an antenna panel may support radio frequency beamforming for a signal transmitted via one or more antenna ports.

The base station105-amay perform wireless communication (e.g., transmit or receive control information or data) directly with one or more of the UE115-athrough the UE115-fvia an access link205(e.g., a Uu interface). Likewise, one or more of the UE115-athrough the UE115-fmay perform wireless communication (e.g., transmit or receive control information or data) directly with the base station via an access link205(e.g., a Uu interface). In the wireless communications system200, a UE115(e.g., the UE115-athrough the UE115-f) may perform wireless communication (e.g., transmit or receive sidelink control information or sidelink data) with another UE115in the wireless communications system200via a sidelink210(e.g., a PC5 interface). In some examples, the base station105-amay perform wireless communication (e.g., transmit or receive control information or data) indirectly with one or more of the UE115-athrough the UE115-fby communicating wireless communication to an intermediate UE115via an access link205(e.g., a Uu interface). The intermediate UE115may forward the wireless communication to a destination UE115via a sidelink210.

In some examples, one or more UEs115(e.g., UE115-b, UE115-f, and UE115-d) may leave a coverage area associated with base station105-d, or may otherwise be located out of coverage of base station105-d. In such examples, the UEs may communicate autonomously on sidelinks210(e.g., in sidelink mode2).

In the example ofFIG.2, one or more of the UE115-athrough the UE115-fmay support one or more radio access technologies. For example, the UE115-band the UE115-dmay support both a first radio access technology (e.g., 4G LTE) and a second radio access technology (e.g., 5G NR). The wireless communications system200may support dynamic efficient system resource utilization on sidelink210for a UE115supporting both 4G LTE and 5G NR (e.g., the UE115-ain coverage and the UE115-bout of coverage). To support the dynamic efficient system resource utilization, one or more of the UEs115-athrough UE115-fmay be enabled to determine when dynamic co-channel operation is allowed or not while in or out of coverage from the base station105-a, and which carriers can or cannot be operated if such dynamic co-channel operation is allowed over NR and LTE resource pools, among other examples. Additionally, the wireless communications system200may enable the base station105-ato manage the dynamic co-channel operation while mitigating or decreasing interference to LTE UEs and resource utilization for NR UEs. As such, for a UE115supporting both 5G NR and 4G LTE, the UE115may operate with either NR resources or LTE resources managed dynamically by the UEs115for improved resource utilization in the wireless communications system200as described herein.

For example, various aspects of present disclosure relate to enabling one or more of the UE115-athrough the UE115-fto support dynamic co-channel operation between NR V2X and LTE V2X. In some examples, the co-channel operation between NR V2X and LTE V2X may be managed by the UEs115. As such, one or more of the UE115-athrough the UE115-fmay identify a co-channel configuration (e.g., preconfigured or configured at one or more of the UEs115) to enable the co-channel operation between NR V2X and LTE V2X. For example, the co-channel configuration may include an indication of resource pools (e.g., patterns of sidelink resources) on the carriers supporting the co-channel operation. The patterns of sidelink resources may be mapped (e.g., via a lookup table (LUT)) with different channel availability parameter values (e.g., such as channel status measurements, quality of service values, UE penetration rates, or the like). Additionally, or alternatively, the co-channel configuration may indicate measurement and reporting for the co-channel operation. Thus, a UE115may identify an NR packet for transmission on a co-channel according to the co-channel configuration. The UE may estimate or otherwise determine (e.g., based on distributed measurements and reporting across multiple UEs115) a channel availability parameter value, and may map the channel availability parameter value to a pattern of sidelink resources associated with the first radio access technology (e.g., LTE). The UE may then transmit the NR packet using LTE resources on the co-channel according to the pattern of sidelink resources. In some examples, a UE115(e.g., UE115-d) may be a special UE. For instance, UE115-dmay be a platoon leader or group leader of a group of V2X UEs115(e.g., UE115-b). In some examples, a special UE may be a roadside unit (RSU), a cluster head, a scheduling UE115, or the like. In such examples, the UE115-dmay receive one or more reports, or an aggregated report, from one or more neighbor UEs115. The reports may include an indication of channel availability parameter values for one or more surrounding UEs115. The UE115-dmay then map the availability parameter value or values to a pattern of sidelink resources associated with the first RAT, and may transmit an indication of the pattern of sidelink resources to one or more UEs115(e.g., UE115-b). In such examples, the receiving UE115(e.g., UE115-b) may utilize LTE resources according to the indicated pattern of sidelink resources received from the special UE115-d.

FIG.3illustrates an example of a multi-carrier operation configuration300that supports autonomous co-channel operations in accordance with aspects of the present disclosure. The multi-carrier operation300may implement or be implemented by one or more aspects of the wireless communications system100and the wireless communications system200. For example, the multi-carrier operation configuration300may be based on a configuration by a base station105, and implemented by a UE115for managing co-channel operations for multiple radio access technologies. The multi-carrier operation300may illustrate an example of a protocol stack including a MAC layer for managing co-channel operations for multiple radio access technologies. In the example ofFIG.3, some MAC operations of the MAC layer may also be omitted, and other MAC operations may be added to the MAC layer.

The multi-carrier operation300may include a first radio access technology305(e.g., 4G LTE) and a second radio access technology310(e.g., 5G NR). Each of the first radio access technology305(e.g., 4G LTE) and the second radio access technology310(e.g., 5G NR) may be associated with one or more logical channels315. Examples of logical channels include a broadcast control channel (BCCH) used for transmission of system information, a common control channel (CCCH) used for transmission of control information, a dedicated control channel (DCCH) used also for transmission of control information, a multicast control channel (MCCH) used for multicast transmission of control information, a dedicated traffic channel (DTCH) used for transmission of downlink or uplink data, or both, to and from a UE115via a Uu interface, a multicast traffic channel (MTCH) used for transmission of downlink data to and from a UE115via a Uu interface, a sidelink traffic channel (STCH) used for transmission of sidelink data via a PC5 interface, or sidelink control channel (SCCH) used for transmission of sidelink control information via a PC5 interface.

The first radio access technology305(e.g., 4G LTE) may be associated with a scheduling priority handling component320-a, and the second radio access technology310(e.g., 5G NR) may be associated with a scheduling priority handling component320-bfor managing co-channel operations. The first radio access technology305(e.g., 4G LTE) may be associated with a multiplexer325-a, and the second radio access technology310(e.g., 5G NR) may be associated with a multiplexer325-bfor managing co-channel operations. The multiplexer325-aand the multiplexer325-bmay support multiplexing of different logical channels and mapping of the logical channels to one or more transport channels340. In some examples, the multiplexer325-aand the multiplexer325-bmay support multiplexing one or more HARQ330-aand HARQ330-b, and mapping of the logical channel to one or more transport channels340. Examples of the one or more transport channels340include a broadcast channel (BCH), a downlink shared channel (DL-SCH), a multicast channel (MCH), and an uplink shared channel (UL-SCH) via a Uu interface, or a sidelink shared channel (SL-SCH) via a PC5 interface.

In the example ofFIG.3, a UE115may support an inter-RAT multi-carrier operation345, which may include a first set of component carriers350(e.g., a component carriers350-a, a component carriers350-b, and a component carriers350-c) associated with the first radio access technology (e.g., 4G LTE) and a second set of component carriers355(e.g., a component carriers355-a, a component carriers355-b, and a component carriers355-c) associated with the second radio access technology (e.g., 5G NR).

FIG.4illustrates an example of a process flow400that supports autonomous co-channel operations in accordance with aspects of the present disclosure. The process flow400may implement or be implemented by one or more aspects of the wireless communications system100and the wireless communications system200. For example, the process flow400may include a UE115-h, a UE115-i, and UE115-m, which may be examples of a UE115described herein. The UE115-hmay be referred to as a transmitting UE supporting multiple radio access technologies, such as 4G LTE and 5G NR. The UE115-imay be referred to as one or more receiving UEs (e.g., for unicast or groupcast or broadcast) supporting a single or multiple radio access technology, such as 5G NR, or both 5G NR and 4G LTE. The UE115-mmay represent one or more UEs supporting a single radio access technology such as 4G LTE (e.g., LTE UEs). For a communication device, such as one or more of the UE115-hor the UE115-isupporting both NR V2X and LTE V2X (e.g., outside of a geographic coverage of a base station105), the communication device may operate with either NR resources or LTE resources managed dynamically by the UEs115for improved system resource utilization. In the following description of the process flow400, operations between the UE115-h, and the UE115-imay occur in a different order or at different times than as shown. Some operations may also be omitted from the process flow400, and other operations may be added to the process flow400.

According to some aspects of the process flow400, one or more of the UE115-hor the UE115-imay identify or receive co-channel configuration information to support co-channel operation as described herein, at402, of the process flow400. Co-channel configuration information may include (e.g., via at least one sidelink parameter of the set of sidelink parameters) a set of component carriers supporting the co-channel operation associated with the first radio access technology (e.g., 4G LTE) and the second radio access technology (e.g., 5G NR). For example, the at least one sidelink parameter of the set of sidelink parameters may include an indication for co-channel operation (e.g., a bit indication may be set to a respective value, such as sl-nr-lte-cochannel is set to “1” for supporting co-channel operation). For example, the at least one sidelink parameter of the set of sidelink parameters may indicate sidelink NR carriers shared with LTE or LTE carriers shared with NR (e.g., sl-nr-lte-cochannel-carrier-list or sl-nr-lte-cochannel-carrier-combined-list). Additionally or alternatively, the at least one sidelink parameter of the set of sidelink parameters may indicate sidelink NR carriers not shared with LTE or LTE carriers not shared with NR (e.g., sl-nr-lte-cochannel-carrier-block-list or sl-nr-lte-cochannel-carrier-combined-block-list). One or more of the UE115-hor the UE115-imay determine the set of component carriers supporting the co-channel operation associated with the first radio access technology (e.g., 4G LTE) and the second radio access technology (e.g., 5G NR) based at least in part on the at least one sidelink parameter of the set of sidelink parameters. In some examples, the at least one sidelink parameter of the set of sidelink parameters may indicate non-overlapped sidelink NR resource pools (e.g., sl-nr-pool-list), sidelink LTE resource pools (e.g., sl-lte-pool-list), or both. In some other examples, the at least one sidelink parameter of the set of sidelink parameters may indicate overlapped or shared sidelink NR-LTE co-channel resource pools (e.g., sl-nr-lte-co-channel-pool-list).

One or more of the UE115-hor the UE115-imay determine at least one of the set of sidelink resource pools based at least in part on the at least one sidelink parameter of the set of sidelink parameters. In some examples, the UEs115may identify, of the one or more sidelink parameters of the set of sidelink parameters, measurement and report parameters or instructions supporting co-channel operation. In some examples, the measurement and report may include at least sidelink reference signal received power (SL-RSRP) or channel busy ratio (CBR) or UE penetration rate, wherein the UE penetration rate may include at least NR UE penetration rate or LTE UE penetration rate. For example, an NR UE penetration rate may be based on the percentage of UEs operating with the second radio access technology (e.g., NR UEs) over the sidelink frequency resources associated to the first radio access technology (e.g. 4G LTE) and shared with the second radio access technology for co-channel in proximity. An LTE UE penetration rate is based on the percentage of UEs operating with the first radio access technology (e.g. LTE UEs) over the sidelink frequency resources associated to the first radio access technology and shared with the second radio access technology for co-channel in proximity. For example, the co-channel configuration information may include one or more sidelink parameters of the set of sidelink parameters for measurement configuration and/or report configuration supporting co-channel operation, e.g., SL-RSRP or CBR or UE penetration rate measurement configuration with sl-MeasConfigCommon (e.g., common configuration) or MeasConfigInfoToAddModList (e.g., UE dedicated configuration) and/or SL-RSRP or CBR or UE penetration rate report configuration with sl-ReportConfigCommon (e.g., common configuration) or sl-ReportConfigList (e.g., UE dedicated configuration) including EventTriggerConfig (e.g., for event trigger report) or PeriodicalReportConfig for periodic report, or both. In some examples (e.g., at404), the UE115-hand the UE115-imay estimate or report channel availability parameter values (e.g., SL-RSRP or CBR or UE penetration rates) according to a reporting or estimating configuration indicated in the co-channel configuration information identified at402. Resource pools that support co-channel operations may be referred to as patterns of sidelink resources. The patterns of sidelink resources may define time intervals during which a UE115supporting NR communications (e.g., UE115-h) may transmit NR packets using LTE resources on the co-channel. Thus, resource pools on the carriers that support NR-LTE co-channel operations may be defined by non-overlapped sidelink NR pools (e.g., as indicated in sl-nr-pool-list parameters) and sidelink LTE pools (e.g., as indicated in sl-lte-pool-list). Overlapped or shared sidelink NR-LTE co-channel pools may be defined via one or more parameters (e.g., sl-nr-lte-co-channel-pool-list).

In some examples, the co-channel configuration information may include an indication of a relationship between a set of channel availability parameter values and a set of patterns of sidelink resources. The channel availability parameter values may include channel quality status or channel busy ratios for the sidelink channel (e.g., for LTE communications or NR communications or both on the sidelink channel as part of the co-channel operation). The channel availability parameter values may include quality of service values for the sidelink communications (e.g., the priority associated with LTE communications, the priority or reliability or latency associated with NR communications, or both). In some examples, the channel availability parameter values may include priority values (e.g., for a generated NR packet). For instance, some NR packets generated at420may be associated with higher priority transmissions (e.g., ultra-reliable low-latency communications (URLLC), emergency communications, or the like), and other NR packets may be associated with lower priority transmissions. The channel availability parameter values may include UE penetration rate (e.g., an NR penetration rate). An NR penetration rate, for example, may refer to a percentage of UEs115supporting NR capability in a wireless communications system100. An NR penetration rate may be determined based on an indication (e.g., indicating an NR UE) in a MAC-CE message, or a sidelink control information message (SCI) (e.g., SCI or SCI2), or based on measurements (e.g., such as contention-based SL-RSRP or CBR measurement or decoding control channel (e.g., PSCCH with SCI part 1) or data channel (e.g., PSSCH with SCI part 2 or MAC CE) for an NR communication). Channel availability measurement parameters may be defined (e.g., in the configuration information) by one or more parameters, such as an NR penetration rate measurement configuration may be indicated via a parameter sl-measConfig (e.g., contained in sl-MeasConfigCommon or MeasConfigInfoToAddModList) and an NR Penetration rate report may be indicated via sl-ReportConfig (e.g., contained in sl-ReportConfigCommon or sl-ReportConfigList), with eventtrigerconfig for event triggered report and/or PeriodicReportConfig for periodic report.

The pattern of sidelink resources may refer to resource pool patterns. For example, each bit of a bit map may indicate useable slots of a set of slots. The indicated slots of the set of slots may be time intervals during which the transmitting UE115-his permitted to utilize LTE resources for transmitting NR packets.

The relationship between the channel availability parameter values and the set of patterns of sidelink resources may define which pattern of sidelink resources the UE115-his permitted to use based on the channel availability parameter values. In some examples, the relationship may be defined in one or more lookup tables (LUTs). For instance, an LUT may define a relationship between NR penetration rates (e.g., a percentage or amount of UEs that support or utilize NR communications) and patterns of sidelink resources, as illustrated with reference to table 1:

In some examples, a LUT may be based on multiple channel availability parameters. For instance, the LUT may indicate different subsets of a first channel availability parameter (e.g., quality of service, SL-RSRP, CBR, or NR penetration rate) with reference to a second channel availability parameter (e.g., NR penetration rate, SL-RSRP, CBR, or quality of service). An example with NR penetration rates as the first channel availability parameter for different subsets and with quality of service as the second channel availability parameter for different entries of each subsets is illustrated with reference to table 2:

In some examples, each channel availability parameter may be mapped to one or more resource pool patterns, or each resource pool pattern may be mapped to one or more channel availability parameters. As described herein (e.g., at406), a UE115-hmay map one or more estimated or indicated channel availability parameters to a pattern of sidelink resources (e.g., according to a LUT indicated in the Co-Channel configuration at402).

In some examples, the co-channel configuration information may be preconfigured, signalled, or any combination thereof. For example, the co-channel configuration information may be preconfigured or hardcoded at the UE115-h, the UE115-i, and any other UEs115. In some examples, the one or more parameter values of the co-channel configuration information may be include in one or more standards documents. In some examples, one or more UEs115may indicate the co-channel configuration information to each other (e.g., via RRC signalling, SCI or SCI2, or the like). In some examples, a base station105may indicate (e.g., via SIB, system information (SI), RRC configuration message, MAC CE or DCI activation or indication, or any combination) the co-channel configuration information to the UEs115-hand the UE115-i(e.g., via a Uu link while the UEs115are in the coverage area of the base station105). In some examples, a message (e.g., a sidelink message from another UE115or a downlink message from a base station105, or the like) may activate or indicate (e.g., PC5 MAC CE or SCI by another UE via PC5 interface, or MAC CE or DCI by baste station105via Uu interface) preconfigured parameters included in the co-channel configuration information (e.g., that are configured, preconfigured or otherwise hardcoded at the UE115).

In some examples, at404, UE115-hmay estimate one or more channel availability parameters. For example, at415, the UE115-hmay perform SL-RSRP or CBR measurement or UE penetration rate estimation based on the measurement or UE detection. For instance, the UE115-hmay estimate a UE penetration rate associated with the second radio access technology (e.g., NR penetration rate) based at least in part on UE measurement such as SL-RSRP or CBR associated to the first radio access technology (e.g., SL-RSRP or CBR measurement with LTE) and the second radio access technology (e.g., SL-RSRP or CBR measurement with NR) respectively or UE detection (e.g., an NR UE with an indication of supporting the second radio access technology, or an LTE UE without an indication of supporting the second radio access technology).

Additionally or alternatively, the UE115-hmay determine a set of suitable resources associated with one or more the first radio access technology (e.g., 4G LTE) or the second radio access technology (e.g., 5G NR). The UE115-hmay determine to support wireless communication (e.g., transmit or receive wireless communication) using a set of resources associated with one or more the first radio access technology (e.g., 4G LTE) or the second radio access technology (e.g., 5G NR) based at least in part on the determined suitable resources. The UE115-hmay monitor NR communications, or receive sidelink UE capability or sidelink UE assistance information message, or any combination thereof, from other UEs (e.g., UEs115-i) indicating that the other UEs support the second radio access technology, to determine the ratio of a number of UEs115(e.g., of a set of total UEs115within a threshold distance or in a configured group, fleet, or platoon of UEs, or the like) that support or are currently utilizing NR communications to a number of total UEs115(e.g., UEs115that support or are currently utilizing NR communications and UEs115that do not support or are not currently utilizing NR communications) for NR penetration ratio. Or to determine the ratio of a number of UEs115(e.g., of a set of total UEs115within a threshold distance or in a configured group, fleet, or platoon of UEs, or the like) that do not support or are not currently utilizing NR communications with a number of total UEs115(e.g., UEs115that support or are currently utilizing NR communications and UEs115that do not support or are not currently utilizing NR communications) for LTE penetration ratio.

In some examples, the UE115-hmay determine a QoS or a priority level (e.g., for LTE resources or NR resources, or for an NR packet prepared at420). In some examples, the UE115-hmay measure SL-RSRP or CBR to determine the difference between the SL-RSRP or CRB for the LTE resources and the SL-RSRP or CRB for the NR resources. The UE115-hmay also determine that either LTE resources or NR resources are used as the suitable resources based on comparing the difference with a threshold as one sidelink parameter of a set of sidelink parameters in co-channel configuration information. In some examples, the UE115-hmay measure SL-RSRP or CBR to determine the ratio between the SL-RSRP or CRB for the LTE resources and the SL-RSRP or CRB for the NR resources or vice versa. The UE115-hmay also determine that either LTE resources or NR resources are used as the suitable resources based on comparing the ratio with a threshold as one sidelink parameter of a set of sidelink parameters in co-channel configuration information. In some examples, the UE115-hmay measure the SL-RSRP or CBR for the LTE resources and the SL-RSRP or CRB for the NR resources. The UE115-hmay also decide that either LTE resources or NR resources are used as the suitable resources based on comparing the SL-RSRP or CBR for the LTE resources with a threshold as one sidelink parameter of a set of sidelink parameters in co-channel configuration information and/or comparing the SL-RSRP or CBR for the NR resources with a threshold as another sidelink parameter of a set of sidelink parameters in co-channel configuration information.

In some examples, the UE115-hmay determine one or more channel availability parameters based at least in part on receiving one or more channel availability reports. For example, one or more neighboring UEs115(e.g., UE115-i) may estimate one or more channel availability parameters. For example, at405, the UE115-imay perform SL-RSRP or CBR measurement and/or UE penetration rate estimation. For instance, the UE115-imay estimate a UE penetration rate associated with the second radio access technology (e.g., NR penetration rate) based at least in part on UE measurement or UE detection. Additionally, or alternatively, the UE115-imay determine a set of suitable resources associated with one or more the first radio access technology (e.g., 4G LTE) or the second radio access technology (e.g., 5G NR). The UE115-imay determine to support wireless communication (e.g., transmit or receive wireless communication) using a set of resources associated with one or more the first radio access technology (e.g., 4G LTE) or the second radio access technology (e.g., 5G NR) based at least in part on the determined suitable resources. The UE115-imay monitor NR communications, or receive sidelink UE capability or sidelink UE assistance information message, or any combination thereof, to determine an NR penetration rate by determine a number of UEs115(e.g., of a set of total UEs115within a threshold distance or in a configured group, fleet, or platoon of UEs, or the like) that support or are currently utilizing NR communications or to determine an LTE penetration rate by determine a number of UEs115(e.g., of a set of total UEs115within a threshold distance or in a configured group, fleet, or platoon of UEs, or the like) that do not support or are not currently utilizing NR communications. In some examples, the UE115-imay determine a SL-RSRP or CBR for the LTE resources, the NR resources, or both. Having estimated (e.g., measured) the channel availability parameter values, the UE115-imay transmit a channel availability report to the UE115-h. The channel availability report message may be a sidelink UE assistance message or a PC5 RRC signaling message, PC5 MAC-CE (e.g., on a PSSCH), or a sidelink control information (e.g., SCI part 1 on a PSCCH or SCI part 2 on PSSCH), or the like, on PC5 interface.

In such examples, upon receiving the channel availability report at415, the UE115-hmay estimate the channel availability parameter values. In some examples, the UE115-hmay monitor for and receive multiple channel availability reports (e.g., from multiple other UEs115). In some examples, the UE115-hmay aggregate channel availability parameter values from multiple received channel availability reports. In some examples, the UE115-hmay combine received channel availability parameter values with its own estimated or measured channel availability parameter values to generate a complete or updated set of one or more channel availability parameter values. Thus, in some examples, the UE115-hmay estimate a channel availability parameter value (e.g., SL-RSRP or CBR or NR penetration rate or LTE penetration rate) based on its own measurements or its detection of other channel availability parameter values (e.g., detection of other NR and LTE UEs), based on received estimations of channel availability parameter values (e.g., SL-RSRP or CBR or NR penetration rate or LTE penetration rate) from other UEs115(e.g., UE115-i), or any combination thereof.

At406, the UE115-hmay autonomously perform dynamic NR-LTE co-channel operations. The UE115-hmay identify an NR packet for transmission, and may determine whether to utilize LTE resources, and which LTE resources to utilize, based on a relationship between the estimated channel availability parameter values (e.g., determined at415or updated at425) and the patterns of sidelink resources indicated in the co-channel configuration information.

At420, the UE115-hmay prepare an NR packet for transmission. The UE115-hmay identify that an NR packet is scheduled for or otherwise ready for transmitting (e.g., to UE115-i. In some examples, it may be beneficial to utilize LTE resources for transmitting the NR packet.

At425, the UE115-hmay determine where to use LTE resources for transmitting the NR packet on the co-channel configuration. The UE115-hmay determine whether to utilize LTE resources for transmitting the NR packet based on one or more conditions (e.g., based on one or more current values (e.g., current measurements or UE detection) or pending values (e.g., previous measurements or UE detection) for a channel availability parameter). For example, the UE115-hmay determine a QoS requirement for the packet (e.g., a latency or reliability requirement, a priority for the packet, or the like). In some examples, the UE115-hmay determine an SL-RSPR or CBR over an NR resource pool (e.g., configured or indicated in the co-channel configuration information) for NR channel status (e.g., if NR channel is congested). In some examples, the UE115-hmay determine an estimated NR penetration rate or LTE penetration rate (e.g., as determined at404). In some examples, the UE115-hmay utilize the LUT configured in the co-channel configuration information to determine whether to utilize the LTE resources for transmitting the NR packet. In some examples, the UE115-hmay determine whether the determined channel availably parameter value satisfies a threshold value (e.g., as exemplified at404). If so, then the UE115-hmay proceed to map the determined channel availability parameter value to a pattern of sidelink resources based on the channel availability parameter value satisfying the threshold.

At430, the UE115-hmay determine resources on which to transmit (e.g., LTE resources) based at least in part on the estimated channel availability parameter values (e.g., as determined at404), and the mapping relationships indicated in the co-channel configuration. For example, the UE may map the channel availability parameter value to a entry of the LUT (e.g., table 1 or table 2, or the like). For instance, if table 1 is configured in the co-channel configuration information, and the estimated channel availability parameter is an NR penetration rate of 90%, then the UE115-hmay select pool-pattern_1. Pool-pattern_1 may define a pattern of time resources (e.g., slots) during which the UE115-his permitted to utilize LTE resources for transmitting the NR packet. In some examples, the UE115-hmay determine into what range of channel availability parameter values an estimated channel availability parameter value falls. For instance, if the channel availability parameter is 94%, the co-channel configuration information may instruct the UE115-hto select pool-pattern_0 (e.g., pool-pattern_0 applies to an NR penetration rate that is above 90% and up to 100%, while pool-patter_1 applies to an NR penetration rate that is above 80% and up to 90%, etc. Such ranges may apply to any channel availability parameter value.

In some examples, the UE115-hmay consider multiple channel availability parameter values to select the pattern of sidelink resources. For instance, if table 2 is configured in the co-channel configuration information, and the UE115-hestimates an NR rate of 100% and a QoS of 4, then the UE115-hmay select Pool-Patterns 1. LUTs (e.g., such as table 2) may be configured in the co-channel configuration information to include any number of columns representing any number of or combination of channel availability parameter values.

At435, the UE115-hmay transmit the NR packet. The UE115-hmay transmit the NR packet according to the resources selected at430. For instance, if the UE115-hselected LTE resources based on a resource pattern over LTE resources on which to transmit the NR packet, then the UE115-hmay transmit one or multiple transmissions of the NR packet on the LTE resources selected from the determine resource pool pattern.

At440, the UE115-hmay transmit an indication of sidelink resources. For instance, the UE115-hmay transmit, to the UE115-msupporting only LTE, an indication of which sidelink resources the NR packet is to be transmitted on (e.g., at435). In some examples, the UE115-hmay transmit an indication of the selected pattern of sidelink resources. In some examples, the UE115-hmay transmit an indication of one or more reserved sidelink resources (e.g., which may be a subset of an available pattern of sidelink resources selected at430). The indication may be included in an SCI message using the first radio access technology (e.g., an LTE SCI).

In some examples, as described in greater detail with reference toFIG.5, a special UE115may perform scheduling functions, or may otherwise indicate to other UEs115which patterns of sidelink resources to use for transmitting NR packets using LTE resources on a co-channel.

FIG.5illustrates an example of a process flow500that supports autonomous co-channel operations in accordance with aspects of the present disclosure. The process flow500may implement or be implemented by one or more aspects of the wireless communications system100and the wireless communications system200. For example, the process flow500may include a UE115-k, a UE115-j, a UE115-n, and a UE115—which may be examples of UEs115described herein. The UE115-kmay be referred to as a transmitting UE supporting multiple radio access technologies, such as 4G LTE and 5G NR. The UE115-jmay be referred to as one or more receiving UEs (e.g., for unicast or groupcast or broadcast) supporting a single or multiple radio access technology, such as 5G NR, or both 4G LTE and 5G NR. The UE115-j, the UE115-n, or both, may represent one or more UEs supporting a single radio access technology such as 4G LTE (e.g., LTE UEs). The UE115-1may be referred to as a special UE. The special UE may be a group leader or a platoon leader in a V2X deployment, a cluster head, an RSU, a scheduling UE115, or the like. In the following description of the process flow500, operations between the UE115-1, the UE115-k, and the UE115-jmay occur in a different order or at different times than as shown. Some operations may also be omitted from the process flow500, and other operations may be added to the process flow500.

At502, the UEs115(e.g., the UE115-j, the UE115-k, and the UE115-1) may identify or receive co-channel configuration information. Co-channel information may include or indicate (e.g., via at least one sidelink parameter of the set of sidelink parameters) a set of component carriers supporting the co-channel operation associated with the first radio access technology (e.g., 4G LTE) and the second radio access technology (e.g., 5G NR). For example, the at least one sidelink parameter of the set of sidelink parameters may include an indication for co-channel operation (e.g., a bit indication may be set to a respective value, such as sl-nr-lte-cochannel is set to “1” for supporting co-channel operation). For example, the at least one sidelink parameter of the set of sidelink parameters may indicate sidelink NR carriers shared with LTE or LTE carriers shared with NR (e.g., sl-nr-lte-cochannel-carrier-list or sl-nr-lte-cochannel-carrier-combined-list). Additionally, or alternatively, the at least one sidelink parameter of the set of sidelink parameters may indicate sidelink NR carriers not shared with LTE or LTE carriers not shared with NR (e.g., sl-nr-lte-cochannel-carrier-block-list or sl-nr-lte-cochannel-carrier-combined-block-list). One or more of the UEs115may determine the set of component carriers supporting the co-channel operation associated with the first radio access technology (e.g., 4G LTE) and the second radio access technology (e.g., 5G NR) based at least in part on the at least one sidelink parameter of the set of sidelink parameters. In some examples, the at least one sidelink parameter of the set of sidelink parameters may indicate non-overlapped sidelink NR resource pools (e.g., sl-nr-pool-list) and sidelink LTE resource pools (e.g., sl-lte-pool-list). In some other examples, the at least one sidelink parameter of the set of sidelink parameters may indicate overlapped or shared sidelink NR-LTE co-channel pools (e.g., sl-nr-lte-co-channel-pool-list).

One or more of the UE115-j, the UE115-k, or the UE115-1may determine at least one of the set of sidelink resource pools based at least in part on the at least one sidelink parameter of the set of sidelink parameters. In some examples, the UEs115may identify, of the one or more sidelink parameters of the set of sidelink parameters, measurement and report parameters or instructions supporting co-channel operation. For example, SL-RSRP, CBR, NR penetration rate, or LTE penetration rate measurement configuration with sl-MeasConfigCommon (e.g., common configuration) or MeasConfigInfoToAddModList (e.g., UE dedicated configuration) and/or SL-RSRP or CBR or NR penetration rate or LTE penetration rate report with sl-ReportConfigCommon (e.g., common configuration) or sl-ReportConfigList (e.g., UE dedicated configuration) including EventTriggerConfig (e.g., for event trigger report) or PeriodicalReportConfig for periodic report, or both. In some examples (e.g., at504), the UEs115may estimate or report channel availability parameter values (e.g., SL-RSRP or CBR or NR penetration rate or LTE penetration rate) according to a reporting or estimating configuration indicated in the co-channel configuration information identified at502. Resource pools that support co-channel operations may be referred to as patterns of sidelink resources. The patterns of sidelink resources may define time intervals during which a UE115supporting NR communications (e.g., UE115-k) may transmit NR packets using LTE resources on the co-channel. Thus, resource pools on the carriers that support NR-LTE co-channel operations may be defined by non-overlapped sidelink NR pools (e.g., as indicated in sl-nr-pool-list parameters) and sidelink LTE pools (e.g., as indicated in sl-lte-pool-list). Overlapped or shared sidelink NR-LTE co-channel pools may be defined via one or more parameters (e.g., sl-nr-lte-co-channel-pool-list).

In some examples, the co-channel configuration information may include an indication of a relationship between a set of channel availability parameter values and a set of patterns of sidelink resources. The channel availability parameter values may include channel quality status or channel busy ratios for the sidelink channel (e.g., for LTE communications or NR communications or both on the sidelink channel as part of the co-channel operation). The channel availability parameter values may include quality of service values for the sidelink communications (e.g., the priority associated with LTE communications, or the priority or reliability or latency associated with NR communications, or both). In some examples, the channel availability parameter values may include priority values (e.g., for a generated NR packet). For instance, some NR packets generated at420may be associated with higher priority transmissions (e.g., ultra-reliable low-latency communications (URLLC), emergency communications, or the like), and other NR packets may be associated with lower priority transmissions. The channel availability parameter values may include UE penetration rates (e.g., an NR penetration rate). An NR penetration rate, for example, may refer to a percentage of UEs115supporting NR capability in a wireless communications system100. An NR penetration rate may be determined based on an indication (e.g., indicating an NR UE) in a MAC-CE message, or a sidelink control information message (SCI) (e.g., SCI or SCI2), or based on measurements (e.g., such as contention-based SL-RSRP or CBR measurement or decoding control channel (e.g., PSCCH with SCI part 1) or data channel (e.g., PSSCH with SCI part 2 or MAC CE) for an NR communication). Channel availability measurement parameters may be defined (e.g., in the configuration information) by one or more parameters, such as an NR penetration rate measurement configuration may be indicated via a parameter sl-measConfig (e.g., contained in sl-MeasConfigCommon or MeasConfigInfoToAddModList)) and an NR Penetration rate report may be indicated via sl-ReportConfig (e.g., contained in sl-ReportConfigCommon or sl-ReportConfigList), with eventtrigerconfig for event triggered report and/or PeriodicReportConfig for periodic report.

The pattern of sidelink resources may refer to resource pool patterns. For example, each bit of a bit map may indicate useable slots of a set of slots. The indicated slots of the set of slots may be time intervals during which the transmitting UE115-kis permitted to utilize LTE resources for transmitting NR packets.

The relationship between the channel availability parameter values and the set of patterns of sidelink resources may define which pattern of sidelink resources the UE115-kis permitted to use based on the channel availability parameter values. In some examples, the relationship may be defined in one or more lookup tables (LUTs). For instance, an LUT may define a relationship between NR penetration rates (e.g., a percentage or amount of UEs115that support or utilize NR communications) and patterns of sidelink resources, as illustrated with reference to table 1, as described with reference toFIG.4.

In some examples, a LUT may be based on multiple channel availability parameters. For instance, the LUT may indicate different subsets of a first channel availability parameter (e.g., quality of service, SL-RSRP, CBR, or NR penetration rate) with reference to a second channel availability parameter (e.g., NR penetration rate, SL-RSRP, CBR, or quality of service). An example with NR penetration rates as the first channel availability parameter for different subsets and with quality of service as the second channel availability parameter for different entries of each subsets is illustrated with reference to table 2 above.

In some examples, each channel availability parameter may be mapped to one or more resource pool patterns, or each resource pool pattern may be mapped to one or more channel availability parameters. As described herein (e.g., at524), a UE115-1may map one or more estimated or indicated channel availability parameters to a pattern of sidelink resources (e.g., according to a LUT indicated in the Co-Channel configuration at402).

In some examples, the co-channel configuration information may be preconfigured, signalled, or any combination thereof. For example, the co-channel configuration information may be preconfigured or hardcoded at the UE115-j, the UE115-k, and the UE115-1, and any other UEs115. In some examples, the one or more parameter values of the co-channel configuration information may be included in one or more standards documents. In some examples, one or more UEs115may indicate the co-channel configuration information to each other (e.g., via RRC signalling, SCI or SCI2, or the like). In some examples, a base station105may indicate (e.g., via SIB, system information (SI), RRC configuration message, MAC CE or DCI activation or indication, or any combination) the co-channel configuration information to the UE115-1(e.g., via a Uu link while the UEs115are in the coverage area of the base station105or as part of a co-channel configuration). In some examples, a message (e.g., a sidelink message from another UE115or a downlink message from a base station105, or the like) may activate or indicate (e.g., PC5 MAC CE or SCI by another UE via PC5 interface, or MAC CE or DCI by baste station105via Uu interface) preconfigured parameters included in the co-channel configuration information (e.g., that are configured, preconfigured or otherwise hardcoded at the UE115).

According to some aspects of the process flow500, at506, the UE115-kmay estimate channel availability parameter values. For example, the UE115-kmay perform SL-RSRP or CBR measurement or UE estimation based on the measurement or UE detection. For example, the UE115-kmay estimate a UE penetration rate associated with the second radio access technology (e.g., NR penetration) based at least in part on UE measurement such as SL-RSRP or CBR associated to the first radio access technology (e.g., SL-RSRP or CBR measurement with LTE) and the second radio access technology (e.g., SL-RSRP or CBR measurement with NR) respectively or UE detection (e.g., an NR UE with an indication of supporting the second radio access technology, or an LTE UE without an indication of supporting the second radio access technology).

Additionally, or alternatively, the UE115-kmay determine a set of suitable resources associated with one or more the first radio access technology (e.g., 4G LTE) or the second radio access technology (e.g., 5G NR). The UE115-kmay determine to support wireless communication (e.g., transmit or receive wireless communication) using a set of resources associated with one or more the first radio access technology (e.g., 4G LTE) or the second radio access technology (e.g., 5G NR) based at least in part on the determined suitable resources. In some examples, the UE115-kmay monitor NR communications, or receive sidelink UE capability or sidelink UE assistance information message, or any combination thereof, from other UEs (e.g., UEs115-i), to determine UE penetration rate as exemplified at415. In some examples, the UE115-kmay measure SL-RSRP or CBR to determine either LTE resources or NR resources are used as the suitable resources as exemplified at415.

Similarly, at508, the UE115-jmay estimate channel availability parameter values (e.g., may perform SL-RSRP or CBR measurement and/or UE penetration rate estimation). For example, the UE115-jmay estimate a UE penetration rate associated with the second radio access technology (e.g., NR penetration rate) based at least in part on UE measurement or UE detection. Additionally, or alternatively, the UE115-jmay determine a set of suitable resources associated with one or more the first radio access technology (e.g., 4G LTE) or the second radio access technology (e.g., 5G NR). The UE115-jmay determine to support wireless communication (e.g., transmit or receive wireless communication) using a set of resources associated with one or more the first radio access technology (e.g., 4G LTE) or the second radio access technology (e.g., 5G NR) based at least in part on the determined suitable resources. In some examples, the UE115-jmay monitor NR communications, or receive sidelink UE capability or sidelink UE assistance information message, or any combination thereof, from other UEs (e.g., UEs115-i), to determine UE penetration rate as exemplified at415. In some examples, the UE115-jmay measure SL-RSRP or CBR to determine either LTE resources or NR resources are used as the suitable resources as exemplified at415.

At510, the UE115-kmay transmit a report to the UE115-1. For example, the UE115-kmay transmit an indication of a set of channel availability parameter values (e.g., an UE penetration rate, a CBR or SL-RSRP for NR or LTE or both, a priority level, a QoS level, among other examples) indicating an amount of available sidelink radio frequency resources associated with one or more the first radio access technology (e.g., 4G LTE) or the second radio access technology (e.g., 5G NR). In some examples, the UE115-kmay transmit the report to the UE115-1via a sidelink control channel (e.g., via an SCI part 1 on PSCCH) or a sidelink shared channel (e.g., via an SCI part 2 or a PC5 MAC-CE on PSSCH) configured for reporting the set of channel availability parameter values for the co-channel operation, or a sidelink UE assistance information message or a PC5 RRC signaling message.

Similarly, at512, the UE115-jmay transmit a report to the UE115-1. For example, the UE115-jmay transmit an indication of a set of channel availability parameter values (e.g., an UE penetration rate, a CBR or SL-RSRP for NR or LTE or both, a priority level, a QoS level, among other examples) indicating an amount of available sidelink radio frequency resources associated with one or more the first radio access technology (e.g., 4G LTE) or the second radio access technology (e.g., 5G NR). In some examples, the UE115-jmay transmit the report to the UE115-1via a sidelink control channel (e.g., via an SCI part 1 on PSCCH) or a sidelink shared channel (e.g., via an SCI part 2 or a MAC-CE on PSSCH) configured for reporting the set of channel availability parameter values for the co-channel operation, or a sidelink UE assistance information message or a PC5 RRC signaling message.

In some examples, at514, the UE115-1may receive one or more aggregated reports from one or more UEs115(e.g., the UE115-kand the UE115-j). According to some aspects of the process flow500, at516, the UE115-kmay estimate one or more channel availability parameter values (e.g., may perform SL-RSRP or CBR measurement and UE penetration rate estimation as described herein). Similarly, at518, the UE115-jmay perform SL-RSRP or CBR measurement and UE penetration rate estimation as described herein.

At520, the UE115-jmay transmit a report to the UE115-kover a sidelink (e.g., a PC5 interface). For example, the UE115-jmay transmit an indication of a set of channel availability parameter values (e.g., an NR penetration rate, a SL-RSRP or CBR for NR or LTE or both, a priority level, a QoS level, among other examples) indicating an amount of available sidelink radio frequency resources associated with one or more the first radio access technology (e.g., 4G LTE) or the second radio access technology (e.g., 5G NR). The UE115-kmay aggregate the report received from the UEs115-jwith its own report (e.g., set of channel availability parameter values), or one or more additional reports received from one or more additional UEs, or both. The UE115-kmay transmit an aggregated report to the UE115-1via a PC5 interface. For example, at522, the UE115-kmay transmit an indication of an aggregated set of channel availability parameter values associated with one or more the first radio access technology (e.g., 4G LTE) or the second radio access technology (e.g., 5G NR) via SCIs (e.g., multiple fields corresponding the received reports respectively), MAC CE(s) (e.g., multiple MAC CEs corresponding the received reports respectively or a MAC CE with multiple fields corresponding the received reports respectively), a sidelink UE assistance information message with a list of reports corresponding the received reports, or a PC5 RRC signaling message with a list of reports corresponding the received reports.

The UE115-kmay transmit the aggregated report to the UE115-1via a configured PSSCH (e.g., SCI part 2 or MAC CE). In some examples, the UE115-kmay transmit the aggregated report using multiple MAC-CEs for the multiple channel availability parameter values (e.g., SL-RSRP, CBR, UE penetration rate or a suitable resource, among other examples). As such, each MAC-CE of the multiple MAC-CEs may indicate a respective channel availability parameter value (e.g., NR penetration rate or a contention-based resource, among other examples). In some other examples, the UE115-kmay transmit the aggregated report using a single MAC-CE with multiple MAC-CE fields for the multiple channel availability parameter values (e.g., SL-RSRP, CBR, UE penetration rate or a suitable resource, among other examples). For example, each MAC-CE field indicating a respective channel availability parameter value (e.g., SL-RSRP, CBR, UE penetration rate or a suitable resource, among other examples).

In the example ofFIG.5, the UE115-1may enable dynamic co-channel operations for one or more of the UE115-1, the UE115-k, or the UE115-jbased at least in part on the estimated channel availability reported at504or514in the process flow500.

At528, the UE115-1may determine resources (e.g., LTE resources or NR resources) on which the UE115-kis permitted to transmit an NR packet based at least in part on the estimated channel availability parameter values (e.g., as determined at504or514or additionally with current measurement or estimation). In some examples, the UE115-1may consider channel availability parameters such as an NR sidelink loading parameter value or LTE sidelink loading parameter value.

At530, the UE115-1may select sidelink resource pool pattern based on mapping the channel availability parameter value to a LUT (e.g., table 1 or table 2, or the like). For instance, if table 1 is configured in the co-channel configuration information, and the estimated channel availability parameter is an NR penetration rate of 90%, then the UE115-1may select pool-pattern_1. Pool-pattern_1 may define a pattern of time resources (e.g., slots) during which the UE115-1is permitted to utilize LTE resources for transmitting the NR packet. In some examples, the UE115-1may determine into what range of channel availability parameter values an estimated channel availability parameter value falls. For instance, if the channel availability parameter is 94%, the co-channel configuration information may instruct the UE115-1to select pool-pattern_0 (e.g., pool-pattern_0 applies to an NR penetration rate that is above 90% and up to 100%, while pool-patter_1 applies to an NR penetration rate that is above 80% and up to 90%, etc. Such ranges may apply to any channel availability parameter value.

In some examples, the UE115-1may consider multiple channel availability parameter values to select the pattern of sidelink resources. For instance, if table 2 is configured in the co-channel configuration information, and the UE115-1estimates an NR rate of 100% and a QoS of 4, then the115-1may select Pool-Patterns_1. LUTs (e.g., such as table 2) may be configured in the co-channel configuration information to include any number of columns representing any number of or combination of channel availability parameter values. At534, the UE115-1may transmit, to the UEs115in proximity (e.g., to a UE115-kthat transmits an estimated channel availability parameter value or an aggregated channel availability parameter report at504or514), an indication of a sidelink resource pattern. The indication may be a PC5 MAC-CE, or an SCI, or the like, for activating a sidelink resource pool pattern. For instance, the UE115-1may transmit, to the UEs115, an indication of the resource pool pattern selected at530. The UE115-kmay indicate the selected pattern of sidelink resources (e.g., using sidelink resource pattern index or the code point in the LUT table configured in the co-channel configuration information). In some examples, the UE115-1may be capable of supporting both NR communications and LTE communications. In some examples, the UE115-1may only support either LTE communications or NR communications. The transmission from the UE115-1received by the UE115-kat534may activate the resource of the selected pattern of sidelink resources (e.g., may indicate during which slots the UE115-kis permitted to utilize LTE resources for transmitting NR packets). In some examples, the UE115-kmay forward the received MAC CE or SCI activating sidelink resource pattern to the UE115-j.

In some examples, the UE115-1may determine an update to a LUT (e.g., the mapping between channel availability parameter values and resource pool patterns) based on system loading, channel measurement (SL-RSRP or CBR), or estimated UE penetration rate, jointly with the channel availability parameter values received from UEs115(e.g., reported at510,512and/or522). In such cases, the UE115-1may start PC5 RRC reconfiguration procedure with UEs115in proximity (e.g., sending RRCReconfigurationSidelink with the update LUT in the co-channel configuration information to UEs115). In some examples, the UE115-kmay forward the received configuration to UEs115-j(e.g., using an RRCReconfigurationSidelink to a UE115-j, a PC5 RRC group message to a group of UEs115-j, or a PC5 RRC common message to all UEs115-jin proximity). UEs115may respond with RRCReconfigurationCompleteSidelink to UE115-1or UE115-kto complete the PC5 RRC reconfiguration procedure.

In some examples, at536, the UE115-kmay identify an NR packet for transmission, and may transmit the NR packet to the UE115-jusing one or more of the LTE sidelink resources activated at534. In some examples, at538, the UE115-kmay transmit (e.g., to the UE115-m) an indication of sidelink resources. For instance, the UE115-kmay transmit, to the UE115-m, an indication of which sidelink resources the NR packet is to be transmitted on (e.g., at536). In some examples, the UE115-kmay transmit an indication of the selected pattern of sidelink resources (e.g., using a code point indicated in the first column of table 1 or table 2). In some examples, the UE115-kmay transmit an indication of one or more reserved sidelink resources (e.g., which may be a subset of an activated pattern of sidelink resources indicated at534). The indication may be included in an SCI associated with the first radio access technology (e.g., LTE SCI).

The communications manager620, the receiver610, the transmitter615, or various combinations thereof or various components thereof may be examples of means for performing various aspects of autonomous co-channel operations as described herein. For example, the communications manager620, the receiver610, the transmitter615, or various combinations or components thereof may support a method for performing one or more of the functions described herein.

In some examples, the communications manager620may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver610, the transmitter615, or both. For example, the communications manager620may receive information from the receiver610, send information to the transmitter615, or be integrated in combination with the receiver610, the transmitter615, or both to receive information, transmit information, or perform various other operations as described herein.

The communications manager620may support wireless communications at a first UE in accordance with examples as disclosed herein. For example, the communications manager620may be configured as or otherwise support a means for receiving a control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations. The communications manager620may be configured as or otherwise support a means for estimating one or more channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both. The communications manager620may be configured as or otherwise support a means for selecting a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values. The communications manager620may be configured as or otherwise support a means for communicating on the set of sidelink resources according to the selected pattern of sidelink resources.

Additionally, or alternatively, the communications manager620may support wireless communications at a second UE in accordance with examples as disclosed herein. For example, the communications manager620may be configured as or otherwise support a means for receiving control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations. The communications manager620may be configured as or otherwise support a means for receiving a report message from a first UE, the report message including an indication of a set of channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both. The communications manager620may be configured as or otherwise support a means for selecting a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values. The communications manager620may be configured as or otherwise support a means for transmitting, to the first UE, an indication of the pattern of sidelink resources associated with the one or more channel availability parameter values for communication by the first UE according to the pattern of sidelink resources.

By including or configuring the communications manager620in accordance with examples as described herein, the device605(e.g., a processor controlling or otherwise coupled to the receiver610, the transmitter615, the communications manager620, or a combination thereof) may support techniques for autonomous co-channel operations that may result in more efficient use of available resources, decreased system latency, and improved user experience.

The device705, or various components thereof, may be an example of means for performing various aspects of autonomous co-channel operations as described herein. For example, the communications manager720may include a co-channel configuration manager725, a channel availability parameter estimation manager730, a resource pattern manager735, a channel availability report manager740, a resource activation manager745, or any combination thereof. The communications manager720may be an example of aspects of a communications manager620as described herein. In some examples, the communications manager720, or various components thereof, may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver710, the transmitter715, or both. For example, the communications manager720may receive information from the receiver710, send information to the transmitter715, or be integrated in combination with the receiver710, the transmitter715, or both to receive information, transmit information, or perform various other operations as described herein.

The communications manager720may support wireless communications at a first UE in accordance with examples as disclosed herein. The co-channel configuration manager725may be configured as or otherwise support a means for receiving a control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations. The channel availability parameter estimation manager730may be configured as or otherwise support a means for estimating one or more channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both. The resource pattern manager735may be configured as or otherwise support a means for selecting a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values. The resource pattern manager735may be configured as or otherwise support a means for communicating on the set of sidelink resources according to the selected pattern of sidelink resources.

Additionally, or alternatively, the communications manager720may support wireless communications at a second UE in accordance with examples as disclosed herein. The co-channel configuration manager725may be configured as or otherwise support a means for receiving control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations. The channel availability report manager740may be configured as or otherwise support a means for receiving a report message from a first UE, the report message including an indication of a set of channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both. The resource pattern manager735may be configured as or otherwise support a means for selecting a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values. The resource activation manager745may be configured as or otherwise support a means for transmitting, to the first UE, an indication of the pattern of sidelink resources associated with the one or more channel availability parameter values for communication by the first UE according to the pattern of sidelink resources.

FIG.8shows a block diagram800of a communications manager820that supports autonomous co-channel operations in accordance with aspects of the present disclosure. The communications manager820may be an example of aspects of a communications manager620, a communications manager720, or both, as described herein. The communications manager820, or various components thereof, may be an example of means for performing various aspects of autonomous co-channel operations as described herein. For example, the communications manager820may include a co-channel configuration manager825, a channel availability parameter estimation manager830, a resource pattern manager835, a channel availability report manager840, a resource activation manager845, or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The communications manager820may support wireless communications at a first UE in accordance with examples as disclosed herein. The co-channel configuration manager825may be configured as or otherwise support a means for receiving a control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations. The channel availability parameter estimation manager830may be configured as or otherwise support a means for estimating one or more channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both. The resource pattern manager835may be configured as or otherwise support a means for selecting a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values. In some examples, the resource pattern manager835may be configured as or otherwise support a means for communicating on the set of sidelink resources according to the selected pattern of sidelink resources.

In some examples, the co-channel configuration manager825may be configured as or otherwise support a means for identifying, in the co-channel configuration, an indication of a relationship between a set of channel availability parameter values and a set of patterns of sidelink resources, where each pattern of sidelink resources of the set of patterns of sidelink resources is associated with at least one channel availability parameter value.

In some examples, the resource pattern manager835may be configured as or otherwise support a means for mapping the estimated one or more channel availability parameter values to the set of channel availability parameter values. In some examples, the resource pattern manager835may be configured as or otherwise support a means for identifying the pattern of sidelink resources from the set of patterns of sidelink resources that is associated with the estimated one or more channel availability parameter values based on the mapping. In some examples, the resource pattern manager835may be configured as or otherwise support a means for selecting the pattern of sidelink resources based on identifying the pattern of sidelink resources from the set of patterns of sidelink resources.

In some examples, the indication of the relationship includes a lookup table.

In some examples, the channel availability parameter value includes an indication of quality of service, a priority level, a channel busy ratio, a penetration rate associated with the first radio access technology, the second radio access technology, or both, or any combination thereof.

In some examples, the penetration rate includes an amount of UEs of a set of UEs operating according to the second radio access technology.

In some examples, the co-channel configuration manager825may be configured as or otherwise support a means for determining a set of component carriers supporting the co-channel operations based on at least one sidelink parameter of the set of sidelink parameters, where the set of component carriers includes one or more of a first subset of component carriers associated with the first radio access technology indicated as shareable or un-sharable with the second radio access technology.

In some examples, the co-channel configuration manager825may be configured as or otherwise support a means for determining a set of sidelink resource pools based on the determined set of component carriers, where the set of sidelink resource pools includes one or more of a first subset of sidelink resource pools associated with the first radio access technology nonoverlapping with a second subset of sidelink resource pools associated with the second radio access technology, or a third subset of sidelink resource pools associated with the first radio access technology overlapping with a fourth subset of sidelink resource pools associated with the second radio access technology.

In some examples, to support estimating the one or more channel availability parameter values, the channel availability parameter estimation manager830may be configured as or otherwise support a means for performing one or more measurements on radio frequency resources associated with the first radio access technology for co-channel operation. In some examples, to support estimating the one or more channel availability parameter values, the channel availability parameter estimation manager830may be configured as or otherwise support a means for detecting operations on radio frequency resources associated with the first radio access technology for the co-channel by devices using the first radio access technology, devices using the second radio access technology, or both.

In some examples, to support estimating the one or more channel availability parameter values, the channel availability report manager840may be configured as or otherwise support a means for receiving, from one or more additional UEs, channel availability report messages including channel availability parameter values. In some examples, to support estimating the one or more channel availability parameter values, the channel availability report manager840may be configured as or otherwise support a means for aggregating the received channel availability parameter values. In some examples, to support estimating the one or more channel availability parameter values, the channel availability report manager840may be configured as or otherwise support a means for determining the one or more channel availability parameter values based on the aggregating.

Additionally, or alternatively, the communications manager820may support wireless communications at a second UE in accordance with examples as disclosed herein. In some examples, the co-channel configuration manager825may be configured as or otherwise support a means for receiving control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations. The channel availability report manager840may be configured as or otherwise support a means for receiving a report message from a first UE, the report message including an indication of a set of channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both. In some examples, the resource pattern manager835may be configured as or otherwise support a means for selecting a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values. The resource activation manager845may be configured as or otherwise support a means for transmitting, to the first UE, an indication of the pattern of sidelink resources associated with the one or more channel availability parameter values for communication by the first UE according to the pattern of sidelink resources.

In some examples, the co-channel configuration manager825may be configured as or otherwise support a means for identifying, in the co-channel configuration, an indication of a relationship between a set of channel availability parameter values and a set of patterns of sidelink resources, where each pattern of sidelink resources of the set of patterns of sidelink resources is associated with at least one channel availability parameter value.

In some examples, the resource pattern manager835may be configured as or otherwise support a means for mapping the estimated one or more channel availability parameter values to the set of channel availability parameter values. In some examples, the resource pattern manager835may be configured as or otherwise support a means for identifying the pattern of sidelink resources from the set of patterns of sidelink resources that is associated with the one or more channel availability parameter values based on the mapping. In some examples, the resource pattern manager835may be configured as or otherwise support a means for selecting the pattern of sidelink resources based on identifying the pattern of sidelink resources from the set of patterns of sidelink resources.

In some examples, the indication of the relationship includes a lookup table.

In some examples, the channel availability parameter value includes an indication of quality of service, a priority level, a channel busy ratio, a penetration rate associated with the first radio access technology, the second radio access technology, or both, or any combination thereof.

In some examples, to support receiving the report message, the channel availability report manager840may be configured as or otherwise support a means for receiving, on a sidelink control channel or sidelink shared channel, a set of MAC control elements (CEs), each MAC-CE associated with one of the set of channel availability parameter values, where each of the channel availability parameter values is associated with a respective UE of a set of UEs including the set of UEs.

In some examples, to support receiving the report message, the channel availability report manager840may be configured as or otherwise support a means for receiving, on a sidelink control channel or sidelink shared channel, a MAC control element (CE) including a set of fields, where each field of the set of fields includes an indication of a channel availability parameter value of the set of channel availability parameter values, where each of the channel availability parameter values is associated with a respective UE of a set of UEs including the set of UEs.

In some examples, the availability report manager840may be configured as or otherwise support a means for determining a set of component carriers supporting the co-channel operations based on at least one sidelink parameter of the set of sidelink parameters, where the set of component carriers includes one or more of a first subset of component carriers associated with the first radio access technology indicated as shareable or un-sharable with the second radio access technology.

In some examples, the availability report manager840may be configured as or otherwise support a means for determining a set of sidelink resource pools based on the determined set of component carriers, where the set of sidelink resource pools includes one or more of a first subset of sidelink resource pools associated with the first radio access technology nonoverlapping with a second subset of sidelink resource pools associated with the second radio access technology, or a third subset of sidelink resource pools associated with the first radio access technology overlapping with a fourth subset of sidelink resource pools associated with the second radio access technology.

The communications manager920may support wireless communications at a first UE in accordance with examples as disclosed herein. For example, the communications manager920may be configured as or otherwise support a means for receiving a control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations. The communications manager920may be configured as or otherwise support a means for estimating one or more channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both. The communications manager920may be configured as or otherwise support a means for selecting a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values. The communications manager920may be configured as or otherwise support a means for communicating on the set of sidelink resources according to the selected pattern of sidelink resources.

Additionally, or alternatively, the communications manager920may support wireless communications at a second UE in accordance with examples as disclosed herein. For example, the communications manager920may be configured as or otherwise support a means for receiving control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations. The communications manager920may be configured as or otherwise support a means for receiving a report message from a first UE, the report message including an indication of a set of channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both. The communications manager920may be configured as or otherwise support a means for selecting a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values. The communications manager920may be configured as or otherwise support a means for transmitting, to the first UE, an indication of the pattern of sidelink resources associated with the one or more channel availability parameter values for communication by the first UE according to the pattern of sidelink resources.

By including or configuring the communications manager920in accordance with examples as described herein, the device905may support techniques for autonomous co-channel operations that may result in more efficient use of available resources, decreased system latency, and improved user experience.

At1005, the method may include receiving a control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations. The operations of1005may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1005may be performed by a co-channel configuration manager825as described with reference toFIG.8.

At1010, the method may include estimating one or more channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both. The operations of1010may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1010may be performed by a channel availability parameter estimation manager830as described with reference toFIG.8.

At1015, the method may include selecting a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values. The operations of1015may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1015may be performed by a resource pattern manager835as described with reference toFIG.8.

At1020, the method may include communicating on the set of sidelink resources according to the selected pattern of sidelink resources. The operations of1020may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1020may be performed by a resource pattern manager835as described with reference toFIG.8.

At1105, the method may include receiving a control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations. The operations of1105may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1105may be performed by a co-channel configuration manager825as described with reference toFIG.8.

At1110, the method may include estimating one or more channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both. The operations of1110may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1110may be performed by a channel availability parameter estimation manager830as described with reference toFIG.8.

At1115, the method may include identifying, in a co-channel configuration, an indication of a relationship between a set of channel availability parameter values and a set of patterns of sidelink resources, where each pattern of sidelink resources of the set of patterns of sidelink resources is associated with at least one channel availability parameter value. The operations of1115may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1115may be performed by a co-channel configuration manager825as described with reference toFIG.8.

At1120, the method may include mapping the estimated one or more channel availability parameter values to the set of channel availability parameter values. The operations of1120may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1120may be performed by a resource pattern manager835as described with reference toFIG.8.

At1125, the method may include identifying a pattern of sidelink resources from the set of patterns of sidelink resources that is associated with the estimated one or more channel availability parameter values based on the mapping. The operations of1125may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1125may be performed by a resource pattern manager835as described with reference toFIG.8.

At1130, the method may include selecting a pattern of sidelink resources associated with the first radio access technology based on the co-channel configuration and the estimated one or more channel availability parameter values based at least in part on identifying the pattern of sidelink resources from the set of patterns of sidelink resources. The operations of1130may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1130may be performed by a resource pattern manager835as described with reference toFIG.8.

At1135, the method may include communicating on the set of sidelink resources according to the selected pattern of sidelink resources. The operations of1135may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1135may be performed by a resource pattern manager835as described with reference toFIG.8.

At1205, the method may include receiving control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations. The operations of1205may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1205may be performed by a co-channel configuration manager825as described with reference toFIG.8.

At1210, the method may include receiving a report message from a first UE (e.g., special UE), the report message including an indication of a set of channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both. The operations of1210may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1210may be performed by a channel availability report manager840as described with reference toFIG.8.

At1215, the method may include selecting a pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values (e.g., based at least in part on the report received at1210). The operations of1215may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1215may be performed by a resource pattern manager835as described with reference toFIG.8.

At1220, the method may include transmitting, to the first UE, an indication of the pattern of sidelink resources associated with the one or more channel availability parameter values for communication by the first UE according to the pattern of sidelink resources. The operations of1220may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1220may be performed by a resource activation manager845as described with reference toFIG.8.

At1305, the method may include receiving control signaling including an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations. The operations of1305may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1305may be performed by a co-channel configuration manager825as described with reference toFIG.8.

At1310, the method may include receiving a report message from a first UE (e.g., a special UE), the report message including an indication of a set of channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both. The operations of1310may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1310may be performed by a channel availability report manager840as described with reference toFIG.8.

At1315, the method may include identifying, in a co-channel configuration, an indication of a relationship between a set of channel availability parameter values and a set of patterns of sidelink resources, where each pattern of sidelink resources of the set of patterns of sidelink resources is associated with at least one channel availability parameter value. The operations of1315may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1315may be performed by a co-channel configuration manager825as described with reference toFIG.8.

At1320, the method may include mapping the estimated one or more channel availability parameter values to a set of channel availability parameter values. The operations of1320may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1320may be performed by a resource pattern manager835as described with reference toFIG.8.

At1325, the method may include identifying the pattern of sidelink resources from the set of patterns of sidelink resources that is associated with the one or more channel availability parameter values based on the mapping. The operations of1325may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1325may be performed by a resource pattern manager835as described with reference toFIG.8.

At1330, the method may include selecting the pattern of sidelink resources associated with the first radio access technology based on a co-channel configuration and the estimated one or more channel availability parameter values based at least in part on identifying the pattern of sidelink resources from the set of patterns of sidelink resources. The operations of1330may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1330may be performed by a resource pattern manager835as described with reference toFIG.8.

At1335, the method may include transmitting, to the first UE, an indication of the pattern of sidelink resources associated with the one or more channel availability parameter values for communication by the first UE according to the pattern of sidelink resources. The operations of1335may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1335may be performed by a resource activation manager845as described with reference toFIG.8.

Aspect 1: A method for wireless communications at a first UE, comprising: receiving a control signaling comprising an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations; estimating one or more channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both; selecting a pattern of sidelink resources associated with the first radio access technology based at least in part on a co-channel configuration and the estimated one or more channel availability parameter values; and communicating on the set of sidelink resources according to the selected pattern of sidelink resources.

Aspect 2: The method of aspect 1, further comprising: identifying, in the co-channel configuration, an indication of a relationship between a set of channel availability parameter values and a set of patterns of sidelink resources, wherein each pattern of sidelink resources of the set of patterns of sidelink resources is associated with at least one channel availability parameter value.

Aspect 3: The method of aspect 2, further comprising: mapping the estimated one or more channel availability parameter values to the set of channel availability parameter values; identifying the pattern of sidelink resources from the set of patterns of sidelink resources that is associated with the estimated one or more channel availability parameter values based at least in part on the mapping; and selecting the pattern of sidelink resources based at least in part on identifying the pattern of sidelink resources from the set of patterns of sidelink resources.

Aspect 4: The method of any of aspects 2 through 3, wherein the indication of the relationship comprises a lookup table.

Aspect 5: The method of any of aspects 2 through 4, wherein the channel availability parameter value comprises an indication of quality of service, a priority level, a channel busy ratio, a penetration rate associated with the first radio access technology, the second radio access technology, or both, or any combination thereof.

Aspect 6: The method of any of aspects 1 through 5, wherein the penetration rate comprises an amount of UEs of a set of UEs operating according to the second radio access technology.

Aspect 7: The method of any of aspects 1 through 6, further comprising: determining a set of component carriers supporting the co-channel operations based at least in part on at least one sidelink parameter of the set of sidelink parameters, wherein the set of component carriers includes one or more of a first subset of component carriers associated with the first radio access technology indicated as shareable or un-sharable with the second radio access technology.

Aspect 8: The method of aspect 7, further comprising: determining a set of sidelink resource pools based at least in part on the determined set of component carriers, wherein the set of sidelink resource pools includes one or more of a first subset of sidelink resource pools associated with the first radio access technology nonoverlapping with a second subset of sidelink resource pools associated with the second radio access technology, or a third subset of sidelink resource pools associated with the first radio access technology overlapping with a fourth subset of sidelink resource pools associated with the second radio access technology.

Aspect 9: The method of any of aspects 1 through 8, wherein estimating the one or more channel availability parameter values comprises: performing one or more measurements on radio frequency resources associated with the first radio access technology for co-channel operation; or detecting operations on radio frequency resources associated with the first radio access technology for the co-channel by devices using the first radio access technology, devices using the second radio access technology, or both.

Aspect 10: The method of any of aspects 1 through 9, wherein estimating the one or more channel availability parameter values comprises: receiving, from one or more additional UEs, channel availability report messages comprising channel availability parameter values; aggregating the received channel availability parameter values; and determining the one or more channel availability parameter values based at least in part on the aggregating.

Aspect 11: A method for wireless communications at a second UE, comprising: receiving control signaling comprising an indication of a co-channel configuration indicating a set of sidelink parameters for co-channel operation dynamically utilizing sidelink radio frequency resources allocated for a first radio access technology and sidelink radio frequency resources allocated for a second radio access technology according to the co-channel operations; receiving a report message from a first UE, the report message comprising an indication of a set of channel availability parameter values indicating an amount of available sidelink radio frequency resources associated with the first radio access technology, the second radio access technology, or both; selecting a pattern of sidelink resources associated with the first radio access technology based at least in part on a co-channel configuration and the estimated one or more channel availability parameter values; and transmitting, to the first UE, an indication of the pattern of sidelink resources associated with the one or more channel availability parameter values for communication by the first UE according to the pattern of sidelink resources.

Aspect 12: The method of aspect 11, further comprising: identifying, in the co-channel configuration, an indication of a relationship between a set of channel availability parameter values and a set of patterns of sidelink resources, wherein each pattern of sidelink resources of the set of patterns of sidelink resources is associated with at least one channel availability parameter value.

Aspect 13: The method of aspect 12, further comprising: mapping the estimated one or more channel availability parameter values to the set of channel availability parameter values; identifying the pattern of sidelink resources from the set of patterns of sidelink resources that is associated with the one or more channel availability parameter values based at least in part on the mapping; and selecting the pattern of sidelink resources based at least in part on identifying the pattern of sidelink resources from the set of patterns of sidelink resources.

Aspect 14: The method of any of aspects 12 through 13, wherein the indication of the relationship comprises a lookup table.

Aspect 15: The method of any of aspects 12 through 14, wherein the channel availability parameter value comprises an indication of quality of service, a priority level, a channel busy ratio, a penetration rate associated with the first radio access technology, the second radio access technology, or both, or any combination thereof.

Aspect 16: The method of any of aspects 11 through 15, wherein receiving the report message comprises: receiving, on a sidelink control channel or sidelink shared channel, a set of MAC control elements (CEs), each MAC-CE associated with one of the set of channel availability parameter values, wherein each of the channel availability parameter values is associated with a respective UE of a set of UEs comprising the set of UEs.

Aspect 17: The method of any of aspects 11 through 16, wherein receiving the report message comprises: receiving, on a sidelink control channel or sidelink shared channel, a MAC control element (CE) comprising a set of fields, wherein each field of the set of fields comprises an indication of a channel availability parameter value of the set of channel availability parameter values, wherein each of the channel availability parameter values is associated with a respective UE of a set of UEs comprising the set of UEs.

Aspect 18: The method of any of aspects 11 through 17, further comprising: determining a set of component carriers supporting the co-channel operations based at least in part on at least one sidelink parameter of the set of sidelink parameters, wherein the set of component carriers includes one or more of a first subset of component carriers associated with the first radio access technology indicated as shareable or un-sharable with the second radio access technology.

Aspect 19: The method of any of aspects 11 through 18, further comprising: determining a set of sidelink resource pools based at least in part on the determined set of component carriers, wherein the set of sidelink resource pools includes one or more of a first subset of sidelink resource pools associated with the first radio access technology nonoverlapping with a second subset of sidelink resource pools associated with the second radio access technology, or a third subset of sidelink resource pools associated with the first radio access technology overlapping with a fourth subset of sidelink resource pools associated with the second radio access technology

Aspect 23: An apparatus for wireless communications at a second UE, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 11 through 19.

Aspect 24: An apparatus for wireless communications at a second UE, comprising at least one means for performing a method of any of aspects 11 through 19.