Sidelink resource pool allocation

Abstract

Methods, systems, and devices for wireless communication are described. A first UE can transmit a sidelink request to a second UE. The sidelink request can indicate a set or segment of data resources. The second UE can transmit a positive sidelink response indicating that the set or segment of resources is available for reservation or can refrain from transmitting the positive sidelink response if the set or segment of data resources is not available for reservation. A third UE can transmit a negative sidelink response indicating that the set or segment of data resources is not available for reservation or can refrain from transmitting the negative sidelink response if the set or segment of data resources is available for reservation. The first UE can transmit a sidelink confirmation reserving the requested data resources if the requested data resources are available.

Description

[0001] Cross-referencing

[0002] This patent application claims the benefits of U.S. Provisional Patent Application No. 62 / 950,877, entitled “SIDELINK RESOURCEPOOL DISTRIBUTION,” filed December 19, 2019, and U.S. Patent Application No. 17 / 107,344, entitled “SIDELINK RESOURCE POOL DISTRIBUTION,” filed November 30, 2020, wherein each patent application has been assigned to the assignee of this application, and each patent application is incorporated herein by reference in its entirety. Technical Field

[0003] The following generally pertains to wireless communication, and more specifically to the allocation of sidelink resource pools. Background Technology

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, and broadcasting. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth-generation (4G) systems, such as Long Term Evolution (LTE), LTE-A Advanced (LTE-A), or LTE-A Pro systems, and fifth-generation (5G) systems, which may be referred to as New Radio (NR) systems. These systems can employ technologies such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each of which simultaneously supports communication for multiple communication devices, also referred to as User Equipment (UE).

[0005] In some cases, one or more base stations can communicate with one or more UEs, for example, using uplink communication, downlink communication, or both. Furthermore, UEs can also communicate with each other, for example, via a sidelink communication link. In some cases, one or more base stations can allocate resources for sidelink communication performed by the UEs. Summary of the Invention

[0006] The described techniques relate to improved methods, systems, devices, and apparatuses that support sidelink resource pool allocation. Generally, the described techniques provide for efficiently sharing available data resources in a shared data resource pool configured for communication over a sidelink. Various user equipments (UEs) can communicate with each other over a sidelink control resource to claim shared data resources for sidelink data transmissions. In some examples, a UE can claim a portion of the available data resources. For example, a first UE can transmit a sidelink request to a second UE (e.g., a target UE). The sidelink request can indicate a set of data resources or a defined segment of data resources for reservation. The first UE can monitor for sidelink responses from one or more other UEs. For example, the second UE (e.g., a target UE) can transmit a positive sidelink response indicating that the requested set of resources or the defined segment of resources are available for reservation, or refrain from transmitting a positive sidelink response if the requested set of data resources or the defined segment of data resources are not available for reservation. In some examples, the second UE can transmit a negative sidelink response indicating that the requested set of data resources or the determined segment of data resources are not available for reservation. A third UE (e.g., a non-target UE) can transmit a negative sidelink response indicating that the requested set of data resources or the determined segment of data resources are not available for reservation, or refrain from transmitting a negative sidelink response if the requested set of data resources or the determined segment of data resources are available for reservation. In some examples, the third UE can transmit a positive sidelink response indicating that the requested set of data resources or the determined segment of data resources are available for reservation. If the first UE determines that the requested set of data resources or the determined segment of data resources are available, for example, based on one or more sidelink responses, the first UE can transmit a sidelink confirmation indicating the reserved data resources through which the first UE will transmit one or more data transmissions.

[0007] One innovative aspect of the subject matter described in this disclosure can be implemented in a method of wireless communication at a first UE. The method can include determining shared resources for communication over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots; transmitting, to a second UE, a sidelink request indicating a first set of data resources for reservation over the control resources on a transmit beam in a first portion of a slot of the set of slots; monitoring, by the first UE, for one or more sidelink responses from one or more UEs over the control resources on a receive beam in a second portion of the slot, the one or more sidelink responses including one or more positive sidelink responses indicating that a first set of data resources is available for reservation, or one or more negative sidelink responses indicating that a second set of data resources is unavailable for reservation, or both; and determining, based on the monitoring, whether to transmit, to the second UE, a sidelink confirmation indicating reservation of at least a portion of the first set of data resources over the control resources in a third portion of the slot.

[0008] Another innovative aspect of the subject matter described in this disclosure can be implemented by an apparatus for wireless communication at a first UE. The apparatus can include a processor, a memory coupled with the processor, and instructions stored in the memory. The instructions can be executable by the processor to cause the apparatus to determine shared resources for communication over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots; transmit, to a second UE, a sidelink request indicating a first set of data resources for reservation over the control resources on a transmit beam in a first portion of a slot of the set of slots; monitor, by the first UE, for one or more sidelink responses from one or more UEs over the control resources on a receive beam in a second portion of the slot, the one or more sidelink responses including one or more positive sidelink responses indicating that a first set of data resources is available for reservation, or one or more negative sidelink responses indicating that a second set of data resources is unavailable for reservation, or both; and determine, based on the monitoring, whether to transmit, to the second UE, a sidelink confirmation indicating reservation of at least a portion of the first set of data resources over the control resources in a third portion of the slot.

[0009] Another innovative aspect of the subject matter described in this disclosure can be implemented by an apparatus for wireless communication at a first UE. The apparatus can include means for determining shared resources for communication over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots; transmitting, by the first UE, a sidelink request indicating a first set of data resources for reservation over the control resources on a transmit beam to a second UE in a first portion of a slot of the set of slots; monitoring, by the first UE, for one or more sidelink responses from one or more UEs over the control resources on a receive beam in a second portion of the slot, the one or more sidelink responses including one or more positive sidelink responses indicating a first set of data resources are available for reservation, or one or more negative sidelink responses indicating a second set of data resources are not available for reservation, or both; and determining, based on the monitoring, whether to transmit a sidelink confirmation indicating reservation of at least a portion of the first set of data resources to the second UE over the control resources in a third portion of the slot.

[0010] Another innovative aspect of the subject matter described in this disclosure can be implemented by a non-transitory computer-readable medium storing code for wireless communication at a first UE. The code can include instructions executable by a processor to determine shared resources for communication over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots; transmit, by the first UE, a sidelink request indicating a first set of data resources for reservation over the control resources on a transmit beam to a second UE in a first portion of a slot of the set of slots; monitor, by the first UE, for one or more sidelink responses from one or more UEs over the control resources on a receive beam in a second portion of the slot, the one or more sidelink responses including one or more positive sidelink responses indicating a first set of data resources are available for reservation, or one or more negative sidelink responses indicating a second set of data resources are not available for reservation, or both; and determine, based on the monitoring, whether to transmit a sidelink confirmation indicating reservation of at least a portion of the first set of data resources to the second UE over the control resources in a third portion of the slot.

[0011] Another innovative aspect of the subject matter described in this disclosure can be implemented by a method of wireless communication at a second UE. The method can include determining shared resources for communication over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots; monitoring, over a receive beam, for a sidelink request from a first UE indicating a first set of data resources for reservation in a first portion of a slot of the set of slots over the control resources; receiving the sidelink request from the first UE in the first portion of the slot based on the monitoring, the sidelink request indicating that the second UE is a target UE of the sidelink request; and determining, based on receiving the sidelink request, whether to transmit, over a transmit beam, a sidelink response to the first UE in a second portion of the slot over the control resources, the sidelink response including a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both.

[0012] Another innovative aspect of the subject matter described in this disclosure can be implemented by an apparatus for wireless communication at a second UE. The apparatus can include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions can be executable by the processor to cause the apparatus to determine shared resources for communication over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots; monitor, over a receive beam, for a sidelink request from a first UE indicating a first set of data resources for reservation in a first portion of a slot of the set of slots over the control resources; receive the sidelink request from the first UE in the first portion of the slot based on the monitoring, the sidelink request indicating that the second UE is a target UE of the sidelink request; and determine, based on receiving the sidelink request, whether to transmit, over a transmit beam, a sidelink response to the first UE in a second portion of the slot over the control resources, the sidelink response including a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both.

[0013] Another innovative aspect of the subject matter described in this disclosure can be implemented by an apparatus for wireless communication at a second UE. The apparatus can include means for determining shared resources for communication over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots; monitoring, over a receive beam, for a sidelink request from a first UE in a first portion of a slot of the set of slots over the control resources, the sidelink request indicating a first set of data resources for reservation; receiving the sidelink request from the first UE in the first portion of the slot based on the monitoring, the sidelink request indicating that the second UE is a target UE of the sidelink request; and determining, based on receiving the sidelink request, whether to transmit, to the first UE in a second portion of the slot over a transmit beam, a sidelink response over the control resources, the sidelink response including a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both.

[0014] Another innovative aspect of the subject matter described in this disclosure can be implemented by a non-transitory computer-readable medium storing code for wireless communication at a second UE. The code can include instructions executable by a processor to determine shared resources for communication over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots; monitor, over a receive beam, for a sidelink request from a first UE in a first portion of a slot of the set of slots over the control resources, the sidelink request indicating a first set of data resources for reservation; receive the sidelink request from the first UE in the first portion of the slot based on the monitoring, the sidelink request indicating that the second UE is a target UE of the sidelink request; and determine, based on receiving the sidelink request, whether to transmit, to the first UE in a second portion of the slot over a transmit beam, a sidelink response over the control resources, the sidelink response including a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both.

[0015] Another innovative aspect of the subject matter described in this disclosure can be implemented by a method of wireless communication at a first UE (e.g., a third or non-target UE). The method can include determining shared resources for communication over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots; monitoring, over a receive beam, for a sidelink request from a second UE indicating a first set of data resources for reservation in a first portion of a slot of the set of slots over the control resources; receiving the sidelink request from the second UE in the first portion of the slot based on the monitoring, the sidelink request indicating that the third UE is a target UE of the sidelink request; and determining, based on receiving the sidelink request, whether to transmit, over a transmit beam, a sidelink response to the second UE in a second portion of the slot over the control resources, the sidelink response including a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both.

[0016] Another innovative aspect of the subject matter described in this disclosure can be implemented by an apparatus for wireless communication at a first UE. The apparatus can include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions can be executable by the processor to cause the apparatus to determine shared resources for communication over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots; monitor, over a receive beam, for a sidelink request from a second UE indicating a first set of data resources for reservation in a first portion of a slot of the set of slots over the control resources; receive the sidelink request from the second UE in the first portion of the slot based on the monitoring, the sidelink request indicating that the second UE is a target UE of the sidelink request; and determine, based on receiving the sidelink request, whether to transmit, over a transmit beam, a sidelink response to the second UE in a second portion of the slot over the control resources, the sidelink response including a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both.

[0017] Another innovative aspect of the subject matter described in this disclosure can be implemented by an apparatus for wireless communication at a first UE. The apparatus can include means for determining shared resources for communication over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots; monitoring, over a receive beam, for a sidelink request from a second UE in a first portion of a slot of the set of slots over the control resources, the sidelink request indicating a first set of data resources for reservation; receiving the sidelink request from the second UE in the first portion of the slot based on the monitoring, the sidelink request indicating that the second UE is a target UE of the sidelink request; and determining, based on receiving the sidelink request, whether to transmit, to the second UE in a second portion of the slot over a transmit beam, a sidelink response over the control resources, the sidelink response including a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both.

[0018] Another innovative aspect of the subject matter described in this disclosure can be implemented by a non-transitory computer-readable medium storing code for wireless communication at a first UE. The code can include instructions executable by a processor to determine shared resources for communication over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots; monitor, over a receive beam, for a sidelink request from a second UE in a first portion of a slot of the set of slots over the control resources, the sidelink request indicating a first set of data resources for reservation; receive the sidelink request from the second UE in the first portion of the slot based on the monitoring, the sidelink request indicating that a third UE is a target UE of the sidelink request; and determine, based on receiving the sidelink request, whether to transmit, to the second UE in a second portion of the slot over a transmit beam, a sidelink response over the control resources, the sidelink response including a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 An example of a wireless communications system that supports sidelink resource pool allocation is shown in accordance with aspects of the present disclosure.

[0020] Figure 2 An example of a wireless communications system that supports sidelink resource pool allocation is shown in accordance with aspects of the present disclosure.

[0021] Figure 3 An example of a resource allocation scheme that supports sidelink resource pool allocation is shown in accordance with aspects of the present disclosure.

[0022] Figure 4 An example of a wireless communications system that supports sidelink resource pool allocation is shown.

[0023] Figure 5 An example of a wireless communications system that supports sidelink resource pool allocation is shown.

[0024] Figure 6 An example of a wireless communications system that supports sidelink resource pool allocation is shown.

[0025] Figure 7 An example of a wireless communications system that supports sidelink resource pool allocation is shown.

[0026] Figure 8 And Figure 9 A block diagram of a device that supports sidelink resource pool allocation in accordance with aspects of the present disclosure is shown.

[0027] Figure 10 A block diagram of a communications manager that supports sidelink resource pool allocation in accordance with aspects of the present disclosure is shown.

[0028] Figure 11 A diagram of a system including a device that supports sidelink resource pool allocation in accordance with aspects of the present disclosure is shown.

[0029] Figures 12 to 14 A flow diagram illustrating a method that supports sidelink resource pool allocation in accordance with aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0030] In some examples of the wireless communications system, a base station can communicate with one or more UEs via downlink and uplink signals. The UEs can also communicate with each other via one or more sidelinks. The base station can allocate shared resources for sidelink communications (e.g., communications between user equipment (UEs)). The UEs can perform a beam training procedure to determine one or more characteristics or parameters according to which to communicate with each other, such as directional beams, and the UEs can use the shared resources (e.g., resources from a shared resource pool) to communicate with each other on the sidelink communications link.

[0031] Various aspects generally relate to sidelink communications, and more particularly to determining shared resources, including control resources and data resources, associated with one or more UEs for sidelink communications. In some examples, a shared resource pool for sidelink communications can include control resources and data resources. The control resources can be partitioned into control blocks (e.g., each control block having a duration of 1 slot). For example, in a first portion of a slot for a control block, the control resources can be allocated for transmitting a sidelink request by a first UE. In a second portion of the slot, the control resources can be allocated for transmitting one or more sidelink response messages. Various UEs that receive the sidelink request from the first UE can transmit one or more sidelink responses in the second portion of the slot. In a third portion of the slot, the control resources can be allocated for a sidelink acknowledgement to be transmitted from the first UE that transmitted the sidelink request. The sidelink acknowledgement can indicate data resources reserved in the sidelink request and can be based on the one or more sidelink responses or, alternatively, can be based on a default action in the absence of receiving a sidelink response.

[0032] In some examples, the first UE can use a portion (e.g., less than all) of the data resources for data transmission. In such examples, the remaining data resources can remain unused, which can result in inefficient use of system resources, increased latency, and other examples.

[0033] In some examples, to more efficiently utilize available shared resources, a UE can reserve only a portion (rather than all) of the data resources. For example, the first UE can indicate a set of data resources (e.g., a subset of the data resources) for reservation in the sidelink request. The sidelink request can include an indication of a portion (e.g., a percentage, a ratio, a quantity of time resources, a quantity of frequency resources, or a quantity of spatial resources) of the data resources. In some examples, the sidelink request can include an indication of a determined segment (e.g., a set of time resources, a set of frequency resources, a set of spatial resources, or any combination thereof) of the shared resources. If the indicated data resources (e.g., the portion of the resources, the segment of the resources, and other examples) are available, a second UE can respond with a positive sidelink response. If the indicated data resources (e.g., the portion of the resources, the segment of the resources, and other examples) are not available, a third UE (e.g., a non-target UE) can respond with a negative sidelink response.

[0034] Particular aspects of the subject matter described herein can be implemented to realize one or more advantages. By partitioning or otherwise dividing resources of a shared resource pool, the described techniques can support more efficient use of available resources. Further, by partitioning resources of a shared resource pool, UEs can experience higher power savings. The described techniques can also support improvements in system efficiency, thereby reducing or otherwise avoiding interference.

[0035] Aspects of the disclosure are first described in the context of a wireless communications system. Aspects of the disclosure are further illustrated and described in reference to device diagrams, system diagrams, and flowcharts related to resource allocation schemes and shared resource partitioning. Aspects of the disclosure are further illustrated and described in reference to device diagrams, system diagrams, and flowcharts related to sidelink resource pool allocation.

[0036] Figure 1 An example of a wireless communications system 100 that supports sidelink resource pool allocation is shown in accordance with aspects of the present disclosure. The wireless communications system 100 can include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communications system 100 can be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communications system 100 can support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

[0037] The base stations 105 can be dispersed throughout the geographic area to form the wireless communications system 100 and can be of different forms or have different capabilities. The base stations 105 and UEs 115 can wirelessly communicate via one or more communication links 125. Each base station 105 can provide a coverage area 110 over which UEs 115 and base stations 105 can establish one or more communication links 125. The coverage area 110 can be an example of a geographic area over which the base station 105 and a UE 115 can support

[0038] The UEs 115 can be dispersed throughout the coverage areas 110 of the wireless communications system 100, and each UE 115 can be stationary, or mobile, or both at different times. The UEs 115 can be devices in different forms or having different capabilities. Figure 1 Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein can be able to communicate with various types of devices, such as other UEs 115, base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), as shown in FIG. 1. Figure 1

[0039] ​The base stations 105 can communicate with the core network 130, or with one another, or both. For example, the base stations 105 can interface with the core network 130 through one or more backhaul links 120 (e.g., via an SI, N2, N3, or other interface). The base stations 105 can communicate with one another over the backhaul links 120 (e.g., via an X2, Xn, or other interface) either directly (e.g., direct

[0040] One or more of the base stations 105 described herein can include or can be referred to as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB or giga-NodeB (either of which can be referred to as a gNB), a Home NodeB, or a Home eNodeB, among other examples.

[0041] The UEs 115 can include or can be referred to as mobile devices, wireless devices, remote devices, handheld devices, or subscriber devices, or some other suitable terminology, where the “device” can also be referred to as a unit, a station, a terminal, or a client, among other examples. The UEs 115 can also include or can be referred to as personal electronic devices such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, the UE 115 can include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which can be implemented in various objects such as appliances or vehicles, meters or other equipment, among other examples.

[0042] The UEs 115 described herein can be able to communicate with various types of devices, such as other UEs 115 that sometimes act as relays or Figure 1 devices, as shown.

[0043] The UEs 115 and the base stations 105 can wirelessly communicate with one another via one or more communication links 125 over one or more carriers. The term “carrier” can refer to a set of radio frequency spectrum resources (e.g., frequency channels) with a defined physical layer structure configured for supporting

[0044] In some examples (e.g., in carrier aggregation configurations), a carrier can also have acquisition signaling or control signaling that coordinates operations of other carriers. A carrier can be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN)) and can be positioned based on a channel raster in order to be discovered by a UE 115. The carrier can be operated in a standalone mode where initial acquisition and connection can be made by a UE 115 via the carrier, or the carrier can be operated in a non-standalone mode that uses different carriers (e.g., of the same or a different radio access technology) to anchor connection.

[0045] The communication links 125 shown in wireless communication system 100 can include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions from a base station 105 to a UE 115. Carriers can carry downlink or uplink (e.g., in an FDD mode) or be configured to carry downlink and uplink communications (e.g., in a TDD mode).

[0046] A carrier can be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth can be referred to as a “system bandwidth” of the carrier or wireless communications system 100. For example, the carrier bandwidth can be one of a number of determined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). Devices of wireless communications system 100 (e.g., base stations 105 or UEs 115, or both) can have hardware configurations that support communications over a particular carrier bandwidth or can be configurable to support communications over one of a set of carrier bandwidths. In some examples, wireless communications system 100 can include base stations 105 or UEs 115 that support simultaneous communications via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 can be configured to operate over portions (e.g., sub-bands, BWPs) or all of the carrier bandwidth.

[0047] Signal waveforms transmitted over carriers can be composed of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In OFDM systems, a resource element can consist of one symbol period (e.g., a duration of a modulated symbol) and one subcarrier. In some examples, the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element can depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Thus, the more resource elements that a UE 115 receives and the higher the order of the modulation scheme, the higher the data rates for the UE 115. A wireless communications resource can refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers or beams), and the use of multiple spatial layers can further increase the data rate for communications with a UE 115.

[0048] One or more parameter sets for a carrier can be supported. In some examples, parameters can include subcarrier spacing (Af) and cyclic prefix. One carrier can be divided into one or more BWPs with same or different parameters. In some examples, a UE 115 can be configured with multiple BWPs. In some examples, a single BWP for a carrier can be active at a given time and communications for a UE 115 can be restricted to one or more active BWPs.

[0049] Time intervals for the base stations 105 or the UEs 115 can be expressed in multiples of a basic time unit (which can for example be T s = 1 / (Af max · N f ) seconds, where Af maxNmax,subcarrier spacing f Nmax,DFT size A time interval of the communications resources can be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame can be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0050] Each frame can include a number of sequentially numbered subframes or slots, and each subframe or slot can have the same duration. In some examples, a frame can be divided (e.g., in the time domain) into subframes, and each subframe can be further divided into multiple slots. Alternatively, each frame can include a variable number of slots, and the number of slots can depend on the subcarrier spacing. Each slot can include a number of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period). In some wireless communications systems 100, a slot can be further divided into multiple mini-slots containing one or more symbols. In addition to the cyclic prefix, each symbol period can contain one or more (e.g., N f ) sampling periods. The duration of a symbol period can depend on the subcarrier spacing or the operating band.

[0051] A subframe, a slot, a mini-slot, or a symbol can be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and can be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) can be variable. Additionally, or alternatively, the smallest scheduling unit of the wireless communications system 100 (e.g., in the time domain) can be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0052] Physical channels can be multiplexed on a carrier according to various techniques. A physical control channel and a physical data channel can be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for a physical control channel can be defined by a number of symbol periods and can extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) can be configured for a set of UEs 115. For example, one or more of the UEs 115 can monitor or search control regions for control information according to one or more search space sets, and each search space set can include one or more control channel candidates arranged in an epilogical manner in one or more aggregation levels. An aggregation level for a control channel candidate can refer to a number of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size. Search space sets can include common search space sets configured for sending control information to multiple UEs 115 and UE-specific search space sets for sending control information to a specific UE 115.

[0053] Each base station 105 can provide communication coverage for one or more cells (e.g., macro cells, small cells, hot spots, or other types of cells or various combinations thereof). The term “cell” can refer to a logical communication entity used for communication with a base station 105 (e.g., through a carrier) and can be associated with a identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or other identifiers) used by a base station 105 to identify the cell. In some examples, a cell can also refer to a logical entity upon which a geographic coverage area 110 or a portion of a geographic coverage area 110 (e.g., a sector) operates. The size of such a cell can range from a small area (e.g., a structure, a subset of a structure) to a large area depending on various factors, such as the capacity of the base station 105. For example, a cell can be or include a building, a subset of a building, or an outdoor space between or overlapping geographic coverage areas 110, among other examples.

[0054] Macrocells can typically cover relatively large geographic areas (e.g., a radius of several kilometers) and can allow unrestricted access by UEs 115 with service subscriptions with the network provider supporting the macrocell. Compared to macrocells, small cells can utilize a relatively small amount of power to communicate with UEs 115 and can be supported by the network provider to fill in coverage gaps or to provide additional capacity. Small cells can also be deployed indoors to provide indoor coverage to UEs 115, such as in a home, office, or public building. Small cells can support a limited number of UEs 115 or a limited service area, but can provide higher bandwidth services to UEs 115 in their service area. In some examples, small cells can be configured to support a larger number of UEs 115 or a larger service area than originally intended. In some examples, small cells can be configured to support a larger number of UEs 115 or a larger service area than originally intended. In some examples, base stations 105 can support one or more cells and can also support communication with UEs 115 through one or more components carriers.

[0055] In some examples, a carrier can support multiple cells, and different cells of the carrier can be configured according to different protocol types (e.g., MTC, narrowband (NB-IoT), enhanced mobile broadband (eMBB)) that can provide access for different types of devices.

[0056] In some examples, base stations 105 can be movable and therefore provide communication coverage for a moving geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, but different geographic coverage areas 110 can be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies can be supported by different base stations 105. The wireless communications system 100 can include, for example, a heterogeneous network in which different types of base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.

[0057] The wireless communications system 100 can support synchronous or asynchronous operation. For synchronous operation, the base stations 105 can have similar frame timings, and transmissions from different base stations 105 can be approximately aligned in time. For asynchronous operation, the base stations 105 can have different frame timings, and transmissions from different base stations 105 can not be aligned in time. The techniques described herein can be used for either synchronous or asynchronous operation.

[0058] Some UEs 115, such as MTC or IoT devices, can be low cost or low complexity devices, and can provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication). M2M communication or MTC can refer to data communication technologies that allow devices to communicate with one another or a base station 105 without the need for human intervention. In some examples, M2M communication or MTC can include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program, which can make use of the information or present the information to humans in interaction with the application program. Some UEs 115 can be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.

[0059] Some UEs 115 can be configured to employ operating modes that reduce power consumption, such as a half-duplex contention-based protocol (e.g., a mode in which a device receives communications only via transmissions that are not coordinated with other devices, such as wake-up signals, broadcasts, or other communications that can be received on a random basis). In some examples, half-duplex communications can be performed at a reduced peak rate. Other power conservation techniques for UEs 115 include entering a power saving deep sleep mode when not engaging in active communications, operating over a limited bandwidth (e.g., according to a narrowband protocol), or a combination of these techniques. For example, some UEs 115 can be configured to operate using a narrowband protocol type that is associated with a portion or range (e.g., set of subcarriers or resource blocks (RBs)) of a carrier that is smaller than the carrier itself.

[0060] Wireless communications system 100 can be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, wireless communications system 100 can be configured to support ultra-reliable low-latency communications (URLLC) or mission critical communications. UEs 115 can be designed to support ultra-reliable, low-latency, or mission critical functions (e.g., mission critical function). Ultra-reliable communications can include private communications or group communications and can be supported by one or more mission critical services such as mission critical push-to-talk (MCPTT), mission critical video (MCVideo), or mission critical data (MCData). Support for mission critical functions can include prioritization of services, and mission critical services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission critical, and ultra-reliable low- latency can be used interchangeably herein.

[0061] In some examples, UEs 115 can also be able to communicate directly with other UEs 115 through device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communications can be within the geographic coverage area 110 of a base station 105. Other UEs 115 in such a group may

[0062] In some systems, D2D communication link 135 can be an example of a communication channel between vehicles (e.g., UEs 115), such as a sidelink communication channel. In some examples, vehicles can communicate using vehicle-to-everything (V2X) communications, car-to-car (V2V) communications, or some combination of these. A vehicle can signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system. In some examples, vehicles in a V2X system can communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (e.g., base stations 105) using vehicle-to-network (V2N) communications, or can communicate with both.

[0063] The core network 130 can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 can be an evolved packet core (EPC) or 5G core (5GC), which can include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity that routes packets or interconnects to external networks, such as a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF). The control plane entity can manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the core network 130. User IP packets can be transferred through the user plane entity, which can provide IP address allocation as well as other functions. The user plane entity can be connected to the network operators IP services 150. The operators IP services 150 can include access to the Internet, Intranet(s), an IP multimedia subsystem (IMS), or a packet-switched streaming service.

[0064] Some of the network devices, such as a base station 105, can include subcomponents such as an access network entity 140, which can be an example of an access node controller (ANC). Each access network entity 140 can communicate with UEs 115 through one or more other access network transmission entities 145, which can be referred to as radio heads, smart radio heads, or transmission / reception points (TRPs). Each access network transmission entity 145 can include one or more antenna panels. In some configurations, various functions of each access network entity 140 or base station 105 can be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station 105).

[0065] The wireless communications system 100 can operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Often, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band, since the wavelengths range from approximately one decimeter to one meter in length. UHF waves can be blocked or redirected by buildings and environmental features, but the waves can penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors. Transmission of UHF waves can be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission using the low frequency (LF) or very high frequency (VHF) parts of the spectrum below 300 MHz.

[0066] The wireless communications system 100 can also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as centimeter band, or in an extremely high frequency (EHF) region using frequency bands from 30 GHz to 300 GHz, also known as millimeter band. In some examples, the wireless communications system 100 can support millimeter wave (mmW) communications between the UEs 115 and the base stations 105, and EHF antennas of the respective devices can be smaller and more closely spaced than UHF antennas. In some examples, this can facilitate using antenna arrays within a device. However, the propagation of EHF transmissions can be subject to even greater atmospheric attenuation than SHF transmissions, and can therefore suffer from a shorter range than SHF transmissions. The techniques disclosed herein can be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions can differ by country or regulatory regime.

[0067] The wireless communications system 100 can utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communications system 100 can employ License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed frequency spectrum band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in unlicensed frequency spectrum bands, access points and UEs such as the base stations 105 and the UEs 115 can employ carrier sensing for collision detection and avoidance. In some examples, operations in unlicensed frequency spectrum bands can be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed frequency spectrum band (e.g., LAA). Operations in unlicensed spectrum can include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.

[0068] The base stations 105 or UEs 115 can be equipped with multiple antennas, which can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a base station 105 or a UE 115 can be co-located within one or more antenna arrays or antenna panels, which can support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays can be located at an antenna assembly, such as an antenna tower, in some examples, the antennas associated with a base station 105 can be located in diverse geographic locations. A base station 105 can have an antenna array with a number of rows and columns of antenna ports that can be used to support beamforming of communications to UEs 115. Likewise, a UE 115 can have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, antenna panels can support radio frequency beamforming of signals transmitted via the antenna ports.

[0069] The base stations 105 or the UEs 115 can use MIMO communications to exploit multipath signal propagation and increase the spectral efficiency. Such techniques can be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Similarly, the multiple signals can be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals can be referred to as a spatial stream, and can carry bits associated with the same data stream (e.g., a same codeword) or different data streams (e.g., different codewords). Different spatial layers can be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU- MIMO), in which multiple spatial layers are transmitted to multiple devices.

[0070] Beamforming, which can also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to shape or steer a beam of energy in a specific direction. Beamforming can be achieved by combining the signals communicated by antennas of an array of antennas. The combination of signals can be done in such a way that the antenna elements act as a phased antenna array, in which signals exchanged by the respective antenna elements have phases that are shifted relative to one another by a phase shift. The relative phase shifts of the signals exchanged by the antenna elements can be associated with a particular direction (e.g., with respect to the transmitting device or with respect to some other direction), and the combination of signals can be used to shape or steer an energy beam in that direction. The energy beam can have a beam width that is narrow in some examples and wide in other examples.

[0071] The base stations 105 or the UEs 115 can use beamforming techniques to transmit or receive communications in a directional manner. The base stations 105 or UEs 115 can use beamforming techniques to transmit different

[0072] Base stations 105 can transmit some signals, such as data signals associated with a particular receiving device, in a single beam direction (e.g., associated with a receiving device, such as a UE 115). In some examples, the beam direction associated with transmissions along a single beam direction can be determined based on a signal that is transmitted in one or more beam directions. For example, a UE 115 can receive one or more signals transmitted by a base station 105 in different directions and can report an indication of the signal that the UE 115 received with a highest signal quality, or an otherwise acceptable signal quality, to the base station 105.

[0073] In some examples, transmissions by a device (e.g., base station 105 or UE 115) can be performed using multiple beam directions, and the device can use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmissions (e.g., from a base station 105 to a UE 115). The UE 115 can report feedback indicating precoding weights for one or more beam directions, and the feedback can correspond to a configured number of beams across a system bandwidth or one or more sub-bands. The base station 105 can transmit reference signals that can be precoded or unprecoded (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)). The UE 115 can provide feedback for beam selection, which can be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., multiple-panel type codebooks, linear combination type codebooks, port selection type codebooks). Although these techniques are described with reference to signals transmitted by a base station 105 in one or more directions, a UE 115 can employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying beam directions for subsequent transmission or reception by a UE 115), or transmitting a signal in a single direction (e.g., for transmitting data to a receiving device).

[0074] A receiving device (e.g., a UE 115) can try multiple receive configurations (e.g., directional listening) when receiving various signals from base stations 105, such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a receiving device can try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which can be referred to as “listening” according to different receive beams or receive directions. In some examples, a receiving device can use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receive configuration can be aligned to a beam direction based on listening according to different receive configuration directions (e.g., listening according to multiple beam directions, listening according to different receive beamforming weight sets, or both).

[0075] Wireless communications system 100 can be a packet-based network that operates according to a layered protocol stack. In the user plane, communications at the bearer or Packet Data Convergence Protocol (PDCP) layer can be IP -based. A Radio Link Control (RLC) layer can perform packet segmentation and assembly to communicate over logical channels. A Medium Access Control (MAC) layer can perform priority handling and multiplexing of logical channels into transport channels. The MAC layer can also use error detection techniques, error correction techniques, or both, to support retransmissions by the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer can provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or core network 130 supporting radio bearers for user plane data. At the physical layer, transport channels can be mapped to physical channels.

[0076] The UEs 115 and the base stations 105 can support retransmissions of data to increase the likelihood that data is received successfully. HARQ feedback is one technique of increasing the likelihood that data is received successfully. HARQ can include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions). In some examples, a device can support same-slot HARQ feedback. In some examples, a device can provide HARQ feedback in a specific time slot for data received in a previous symbol in the time slot. In other cases, a device can provide HARQ feedback in a subsequent time slot or according to some other time interval.

[0077] Various UEs 115 can communicate with each other through control resources to request data resources. In some examples, a UE 115 can request only a portion of available data resources. For example, a first UE 115 can transmit a sidelink request to a second UE 115 (e.g., a target UE 115). The sidelink request can indicate a set of data resources or a defined segment of data resources. The first UE 115 can monitor for sidelink responses from other UEs 115. For example, the second UE 115 (e.g., the target UE 115) can transmit a positive sidelink response indicating that the requested set of resources or the defined segment of resources are available for reservation, or refrain from transmitting a positive sidelink response if the requested set of data resources or the defined segment of data resources are not available for reservation. A third UE 115 (e.g., a non-target UE 115) can transmit a negative sidelink response indicating that the requested set of data resources or the determined segment of data resources are not available for reservation, or refrain from transmitting a negative sidelink response if the data resources are available for reservation. If the first UE 115 determines that the requested set of data resources or the determined segment of data resources are available, the first UE 115 can transmit a sidelink confirmation indicating the reserved data resources on which it will subsequently transmit a data transmission.

[0078] Figure 2 An example of a wireless communications system 200 that supports sidelink resource pool allocation is shown, in accordance with aspects of the present disclosure. In some examples, wireless communications system 200 can implement aspects of wireless communications system 100.

[0079] The base stations 205 can serve one or more UEs 215 located within the geographic area 110-a. For example, the base stations 205 can serve the UE 215-a, the UE 215-b, the UE 215-c, the UE 215-d, or the UE 215-e. The UEs 215 can communicate with one another via one or more sidelink connections 220 (e.g., the sidelink connection 220-a, the sidelink connection 220-b, the sidelink connection 220-c, the sidelink connection 220-d, the sidelink connection 220-e, the sidelink connection 220-f, or the sidelink connection 220-g). The base stations 205 can communicate with the UEs 215 via one or more bidirectional communication links 210 (e.g., the bidirectional communication link 210-a, the bidirectional communication link 210-b, the bidirectional communication link 210-c, the bidirectional communication link 210-d, or the bidirectional communication link 210-e).

[0080] In some examples, the base stations 205 can allocate sidelink resources (e.g., shared resources for sidelink communications between the UEs 215) to the UEs 215 via the one or more bidirectional communication links 210. In some examples, the shared resources can include data resources and control resources. The UEs 215 can communicate with one another (e.g., via the sidelink connections 220) to claim at least some of the data resources. The UEs 215 can divide the data resources (e.g., dynamically or as instructed by one or more other devices such as the base stations 205) into sub-pools. In some examples, each sub-pool can be shared, can differ in size, or both, among other differences or similarities. In some examples, the UEs 215 can claim a sub-pool of data resources. The base stations 205 can limit the UEs 215 from claiming the entire pool of shared resources, and can allow the UEs 215 to claim one or more sub-pools (e.g., a whole subset) of the shared resources.

[0081] Other techniques for determining which UEs 215 will have access to data resources can result in system inefficiencies. In some examples, the base station 205 can communicate with the UEs 215 via the bidirectional communication links 210 and can allocate one or more shared resources to one or more respective UEs 215 for each sidelink communication. However, such sidelink communication allocations can result in unnecessary increases in signaling overhead and decreases in system efficiency. In some examples, the UEs 215 can autonomously contend for data resources. In such examples, the resources can be underutilized (resulting in inefficient use of data resources) or overutilized (resulting in increased interference and transmission failures, and decreased user experience). That is, if UEs are configured to be overly cautious in avoiding collisions, or are not configured to appropriately use spatial resources (e.g., beamforming techniques), resources that could otherwise be used can remain unused. Additionally or alternatively, if too many UEs are transmitting on the same shared resources at the same time (e.g., on beams that interfere with each other), link quality can decrease, which can result in one or more of transmission failures, multiple retransmissions, increased system latency, or other issues. To improve system efficiency and reduce interference, among other advantages, the UEs can dynamically request shared resources, e.g., according to a schedule, and can communicate with each other to determine and reduce interference while effectively utilizing available shared resources.

[0082] The UEs 215 can determine a priority schedule, which can determine an order in which the UEs 215 can take turns attempting to request data resources. The UEs 215 can autonomously communicate with each other using control resources according to the priority schedule (e.g., without requiring formal scheduling by the base station 205). In some examples, the base station 205 can transmit an indication of the priority schedule to the UEs 215. In some examples, the UEs 215 can dynamically determine the priority schedule (e.g., without requiring receiving an indication of the priority schedule from the base station).

[0083] The control resources can include resources allocated for signal types. For example, the UEs 215 can determine (e.g., via preconfigured information or signaling from the base station 205) resources for sidelink request messages, positive sidelink responses, and negative sidelink response messages, as well as sidelink acknowledgement messages, as described in more detail with reference to Figure 3 The control resources can include multiple portions of resources, which can be referred to as control blocks. Each control block in the control resources can include resources for one or more of a sidelink request message, a positive sidelink response message, a negative sidelink response message, or a sidelink acknowledgement. A UE 215 scheduled for a particular control block according to the priority schedule can transmit a sidelink request message to a target UE 215 through that control block. The sidelink request message can indicate that the UE 215 intends to transmit a data message through a portion of the shared resources.

[0084] If the UE 215 is scheduled by a previous control block to receive a data transmission over a portion of the data resources, the UE 215 can have priority and can be able to counter the transmission scheduled in the current control block. For example, over a first control block, the UE 215-a can communicate with the UE 215-b and can determine to transmit a data transmission using a portion of the data resources. The UE 215-b can receive the data transmission from the UE 215-a using a first receive beam. Over a second control block, the UE 215-d can be scheduled according to the priority scheduling and can transmit a sidelink request message to the UE 215-e. The UE 215-e can receive the sidelink request message using a second receive beam. If the UE 215-e is available to transmit, the UE 215-e can transmit a positive sidelink response message. However, the UE 215-b can monitor over the second control block using the first receive beam and can receive the sidelink request message over the first receive beam. The UE 215-b can determine that the data transmission from the UE 215-d to the UE 215-e can interfere with the previously scheduled data transmission over the first receive beam. In such an example, because the UE 215-a is a higher priority UE 215 than the UE 215-d (e.g., because the UE 215-a scheduled the UE 215-b for a data transmission over a previous control block), the UE 215-b can transmit a negative sidelink response message. The UE 215-d can receive the negative sidelink response message and can determine to abort or avoid transmitting the data transmission to the UE 215-e.

[0085] In some examples, to efficiently use the data resources in the shared data resource pool, the UE 215 can indicate a set or segment of resources in the shared data resource pool for reservation. For example, the UE 215-d can transmit an indication of a set of data resources (e.g., a certain proportion, percentage, or number of time resources of the data resources, frequency resources of the data resources, spatial resources of the data resources, or any combination thereof) or a defined segment of the shared data resource pool. If the indicated set of data resources or segment of the shared data resource pool is available for a data transmission, for example, the UE 215-e can transmit a positive sidelink response. One or more other UEs 215 can transmit one or more negative sidelink responses indicating that the data resources or segment of the shared data resource pool are not available. If the indicated set of data resources or segment of the shared data resource pool is available for a data transmission, the UE 215-d can transmit a sidelink confirmation indicating a specific time, frequency, or spatial resource (or any combination thereof) for reservation.

[0086] With respect to Figure 3 Examples of control signaling over various control blocks are described in more detail. Reference is made toFigures 4-7 Various signaling scenarios between different UEs 215 are described in more detail.

[0087] Figure 3 An example of a resource allocation scheme 300 that supports sidelink resource pool allocation is shown in accordance with aspects of the present disclosure. In some examples, resource allocation scheme 300 can implement aspects of wireless communications systems 100 and 200.

[0088] In some examples, multiple UEs 315 can communicate with each other (e.g., via one or more sidelink connections). A base station 105 can allocate shared resources to one or more UEs 315. The shared resources can include control resources 305 and a shared data resource pool 310. The UEs 315 can determine which UEs 315 will transmit and receive in the shared data resource pool 310 without additional signaling from the base station 105 and can increase the number of transmissions in the shared data resource pool 310 while reducing interference, among other advantages. The UEs 315 can perform a beam training procedure to determine which transmit beams and receive beams to use to communicate with each other. The UEs 315 can utilize these beams while transmitting control signals, as referenced to FIG. 3. Figures 4 to 7 are described in more detail.

[0089] The UEs 315 can communicate with each other on the control resources 305 to claim data resources from the shared data resource pool 310. The control resources can include one or more control blocks. Each control block can have a duration (e.g., 1 slot). Each control block can include resources allocated for communicating different types of signals. For example, each control block can include resources allocated for one or more of a sidelink request 325 (may also be referred to as a sidelink request), a positive sidelink response 330 (may also be referred to as a positive sidelink response), a negative sidelink response 335 (may also be referred to as a negative sidelink response), or a sidelink acknowledgement 340 (may also be referred to as a sidelink acknowledgement). The UEs 315 can transmit a sidelink request 325 to a target UE 315 to claim a data resource for a data transmission. The sidelink request 325 can include a UE identifier of the target UE 315. Other UEs 315 can monitor the sidelink request 325 (e.g., determine whether the other UEs 315 are the target UE 315 or determine whether a data transmission from the sidelink request transmitting UE 315 will cause more than a threshold amount of interference to a previously scheduled data transmission).

[0090] The target UEs 315 can transmit positive sidelink responses 330 in response to the sidelink request 325 to accept the data transmission. The target UEs 315 can transmit the positive sidelink response message if it determines that it has not been scheduled to receive the data transmission or if a higher priority transmission would not cause interference above a threshold, among other examples. The non-target UEs 315 can transmit negative sidelink responses 335 in response to the sidelink request 325 to object to the data transmission between the UE 315 that transmitted the sidelink request 325 and the target UEs 315. For example, the non-target UEs 315 can transmit the negative sidelink response 335 if the data transmission from the UE 315 that transmitted the sidelink request 325 would interfere with a data transmission previously scheduled for the non-target UE. The positive sidelink responses 330 and the negative sidelink responses 335 can occupy the same time (e.g., can overlap time resources over a portion of the slot 320) and can occupy different frequency tones.

[0091] The UE 315 that transmitted the sidelink request 325 can transmit a sidelink confirmation 340 to confirm the scheduled data transmission or can refrain from transmitting the sidelink confirmation 340 to indicate that the data transmission has been aborted or refrained from performing. In some examples, the UE 315 can transmit the sidelink confirmation 340 if it receives a positive sidelink response 330 from the target UE 315 and does not receive a negative sidelink response 335. In some examples, the UE 315 can refrain from transmitting the sidelink confirmation message if it does not receive a positive sidelink response 330 from the target UE 315 or if the UE 315 receives one or more negative sidelink responses 335 from one or more other UEs 315, or if both occur.

[0092] The UEs 315 can take turns attempting to claim data resources from the shared data resource pool 310 over the corresponding control resources 305 according to the priority schedule. At least some, if not all, of the UEs 315 can be aware of the priority schedule and can therefore monitor, transmit, or receive, or any combination thereof, over the resources allocated for control signals by the respective control blocks.

[0093] In some examples, the base station 105 can transmit a priority-scheduled downlink indication. For example, the priority-scheduled can indicate that UE 315-a is allocated a control block on a time slot 320-a of control resources 305-a, UE 315-b is allocated a control block on a time slot 320-b of control resources 305-a, and UE 315-c is allocated a control block on a time slot 320-c of control resources 305-a. One or more of the UEs 315 can only attempt to request data resources from the shared data resource pool 310-a through their respective allocated control blocks. That is, on time slot 320-a, UE 315-a can transmit a sidelink request 325, but UE 315-b and UE 315-c can refrain or can be prohibited from transmitting a sidelink request message on time slot 320-a. Similarly, UE 315-b can transmit a sidelink request 325 on time slot 320-b, and UE 315-c can transmit a sidelink request 325 on time slot 320-c. The same priority-scheduled downlink indication or a new priority-scheduled indication can indicate the allocation of control resources 305-a or can include a pattern or set of rules for subsequent control resources (e.g., a round-robin schedule, a cycling rule, among other examples).

[0094] For example, the downlink indication can indicate that UE 315-b is allocated a control block on a time slot 320-d of control resources 305-b, UE 315-c is allocated a control block on a time slot 320-e of control resources 305-b, and UE 315-a is allocated a control block on a time slot 320-f of control resources 305-b. In some examples, the UEs 315 can communicate across multiple control resources 305 according to the priority-scheduled until the base station 105 transmits a new indication (e.g., including a new or updated priority-scheduled). In some examples, the base station can transmit a new priority-scheduled indication before each control resource set 305-b.

[0095] In some examples, the UEs 315 can determine a priority-scheduled without input from the base station 105. For example, the UEs 315 can determine a round-robin priority-scheduled. In some examples, UE 315-a is allocated a first time slot (e.g., time slot 320-a) of a first control resource set 305-a, a third time slot (e.g., time slot 320-f) of a second control resource set 305-b, a second time slot (not shown) of a subsequent control resource set 305-c, and so on, across multiple control resource sets 305-a.

[0096] A UE 315 that is assigned a control block earlier than another control block can have a higher priority than a UE 315 that is assigned a later control block. That is, UE 315-a can have a higher priority than UE 315-b, and if UE 315-a is scheduled for transmission on slot 320-a, UE 315-a or a UE 315 scheduled to communicate with UE 315-a can object to a transmission scheduled by UE 315-b on slot 320-b.

[0097] A UE 315 can attempt to request a data resource from shared data resource pool 310 according to the priority schedule. For example, UE 315-a can transmit a sidelink request 325 on a first portion of slot 320-a according to the priority schedule. UE 315-a can transmit sidelink request 325 to a target UE 315 (e.g., UE 315-c). In some examples, UE 315-b and UE 315-c can direct respective receive beams toward UE 315-a based on the priority schedule and other factors. Sidelink request 325 can include an indication of a set of data resources of shared data resource pool 310-a. The set of data resources can include a proportion of shared data resource pool 310-a, a percentage of shared data resource pool 310-a, a number of resources in shared data resource pool 310-a, or any combination thereof.

[0098] For example, sidelink request 325 can include an indication of one-half of shared data resource pool 310-a that is requested to be reserved (e.g., one-half of available data resources or a particular set within the data resources, such as a first half, a middle half, or a last half of the data resources). In some examples, sidelink request 325 can include a time or priority indication (e.g., as an indication of a preference or request for a particular portion (e.g., one-half) of shared data resource pool 310-a). In some examples, sidelink request 325 can include only an indication of a proportion or percentage (e.g., one-half of shared data resource pool 310-a) without an indication of a preference or request for a location of the indicated set of data resources within shared data resource pool 310-a. That is, the indicated one-half of shared data resource pool 310-a can be located in a first half of shared data resource pool 310-a, a last half of shared data resource pool 310-a, or in the middle of shared data resource pool 310-a (e.g., after a first quarter of shared data resource pool 310-a and before a last quarter of shared data resource pool 310-a). Additionally or alternatively, the one-half of shared data resource pool 310-a for reservation can be located in two different sets (e.g., two quarters) that can or can not be contiguous within shared data resource pool 310-a.

[0099] If UE 315-c has at least half of the shared data resource pool 310-a available for data transmissions, UE 315-c can receive a sidelink request 325 on a first portion of the slot 320-a and can transmit a positive sidelink response 330 on a second portion of the slot 320-a. UE 315-b can also receive the sidelink request 325 on the first portion of the slot 320-a. If UE 315-b determines that it does not have a conflicting data transmission schedule during at least half of the shared data resource pool 310-a and other conditions, UE 315-b can refrain from transmitting a negative sidelink response 335 on the second portion of the slot 320-a. For example, UE 315-b can schedule a data transmission from another UE 315 (or another device) during the latter half of the shared data resource pool 310-a. UE 315-b can transmit a negative sidelink response 335 indicating that the latter half of the shared data resource pool 310-a is unavailable. In such an example, UE 315-a can transmit a sidelink confirmation 340 indicating that the former half of the shared data resource pool 310-a is reserved. Alternatively, in some examples, UE 315-b can schedule a data transmission from another UE 315 during some (e.g., more than half of the shared data resource pool 310-a such that half of the shared data resource pool 310-a is unavailable) or all of the shared data resource pool 310-a, and UE 315-b can transmit a negative sidelink response 335. In such an example, UE 315-a can refrain from transmitting a sidelink confirmation 340.

[0100] On a third portion of the slot 320-a, if UE 315-a has received a positive sidelink response 330 from UE 315-c and has not received a negative sidelink response 335 from any other UE 315 (such as UE 315-b), UE 315-a can transmit a sidelink confirmation 340 to UE 315-c indicating a set or segment of resources from the shared data resource pool 310-a that is reserved. UE 315-c can thus be scheduled to receive data transmissions on the set or portion of data resources from the shared data resource pool 310-a on the same receive beam on which it received the sidelink request 325 and the sidelink confirmation 340.

[0101] If the UE 315-a does not receive the positive sidelink response 330 or the negative sidelink response 335, the UE 315-a can fall back to a default behavior. For example, the UE 315-a can determine (e.g., based on not receiving the positive sidelink response 330) that the UE 315-c is not available for data transmission during the shared data resource pool 310-a. In such an example, the UE 315-a can refrain from transmitting the sidelink acknowledgement 340. In such an example, the UE 315-a can also refrain from transmitting a data transmission for a particular duration. For example, the UE 315-a can not transmit a data transmission during the shared data resource pool 310-a, but can contend for the shared data resource pool 310-b during the control resources 305-b.

[0102] On the slot 320-b, the UE 315-b can attempt to schedule a data transmission with a fourth UE 315 (not shown). The UE 315-b can transmit a sidelink request 325 to the fourth UE 315 on a first portion of the slot 320-b. The sidelink request 325 can include an indication of a set or segment of resources of the shared data resource pool 310-a (e.g., the entire shared data resource pool 310-a). On a second portion of the slot 320-b, the fourth UE can transmit a positive sidelink response 330 to the UE 315-b. The UE 315-c can monitor for the sidelink request 325 from the UE 315-b on the second portion of the slot 320-b using the same receive beam as the UE 315-a scheduled the data transmission on the slot 320-a. If the UE 315-c receives the sidelink request 325 from the UE 315-b on the slot 320-b on that beam, the UE 315-c can measure the interference of potential data transmissions from the UE 315 to the fourth UE on that receive beam and other aspects. If the interference is above a threshold (e.g., would produce a relatively low signal to interference plus noise ratio (SINR) on that receive beam), the UE 315-c can oppose the data transmission between the UE 315-b and the target UE 315 on the entire shared data resource pool 310-a (e.g., because the UE 315-a has already scheduled a data transmission during half of the shared data resource pool 310-a). That is, the UE 315-c can transmit a negative sidelink response 335 on the slot 320-b because the UE 315-c is scheduled by the UE 315-a with higher priority than the UE 315-b. Upon receiving the negative sidelink response 335 on the second portion of the slot 320-b, the UE 315-b can abort the data transmission and can refrain from transmitting the sidelink acknowledgement 340 on the third portion of the slot 320-b.

[0103] Other UEs 315 that receive the sidelink request 325 on the slot 320-b can determine that no data transmission is scheduled based on not receiving the sidelink acknowledgement 340 on the third portion of the slot 320-b. Any UE 315 that has successfully scheduled a data transmission (e.g., UE 315-a) can perform the data transmission using the requested data resources from the shared data resource pool 310-a. Through the control resources 305-b, the UEs 315 can claim data resources from the shared data resource pool 310-b according to the priority schedule.

[0104] The UEs 315 can determine which one or more beams to use to communicate with other UEs 315 based on one or more beam training procedures. For example, through the control block, if a UE 315 is not scheduled to receive any data transmission, it can monitor for the sidelink request 325, e.g., according to the priority schedule, by training its receive beam on the UE 315 scheduled to transmit the sidelink request 325, e.g., according to a previously performed beam training procedure. That is, for example, according to a previously performed beam training procedure, both UE 315-b and UE 315-c can direct their receive beams to receive the sidelink request 325 from UE 315-a. UE 315-b and UE 315-c can thus determine whether each is a target UE 315 by receiving the sidelink request 325 on the slot 320-a.

[0105] If a UE 315 has been scheduled to receive a data transmission on a receive beam, it can monitor for the sidelink request 325 using the receive beam. For example, if UE 315-a schedules UE 315-c for a data transmission on a first receive beam on the slot 320-a, UE 315-c can monitor for a subsequent sidelink request 325 through the control resources 305-a on the first receive beam. By monitoring for the sidelink request 325 using the first receive beam, UE 315-c can determine whether a potential subsequent schedulable data transmission would interfere with the previously scheduled data transmission using the first receive beam. UE 315-c can determine whether to transmit a negative sidelink response 335 based on the monitoring for the sidelink request 325 on the first receive beam and other actions.

[0106] Figure 4 An example of a wireless communications system 400 that supports sidelink resource pool allocation is shown, in accordance with aspects of the present disclosure. In some examples, wireless communications system 400 can implement aspects of wireless communications systems 100 and 200.

[0107] In some examples, base station 105-a can communicate with one or more UEs 415. Base station 405 can transmit downlink signals on one or more beams 410. For example, base station 405 can communicate with UE 415-a on beam 410-a, can communicate with UE 415-b on beam 410-b, and can communicate with UE 415-c on beam 410-c. In some examples, base station 405 can allocate shared resources for sidelink communications between one or more UEs 415. The shared resources can include control resources and data resources, the control resources including a plurality of control blocks, as described with reference to Figure 3 In some examples, base station 105-a can communicate with one or more UEs 415. Base station 405 can transmit downlink signals on one or more beams 410. For example, base station 405 can communicate with UE 415-a on beam 410-a, can communicate with UE 415-b on beam 410-b, and can communicate with UE 415-c on beam 410-c. In some examples, base station 405 can allocate shared resources for sidelink communications between one or more UEs 415. The shared resources can include control resources and data resources, the control resources including a plurality of control blocks, as described with reference to Figure 3 In some examples, UEs 415 can use their beams 420 based on the priority schedule. For example, UE 415-a can determine, according to the priority schedule, that UE 415-a is scheduled to attempt to claim data resources through a control block (e.g., through a slot in the control resources). Based on the priority schedule, UE 415-b can use beam 420-b to receive a sidelink request from UE 415-a and determine whether it is a target UE 415 for UE 415-a. UE 415-c can be available for data transmission using some or all of the data resources (e.g., that can not have been previously scheduled by another UE 415). UE 415-c can train beam 420-c on UE 415-a according to the priority schedule and can use beam 420-c to receive a signal from UE 415-a and determine whether it is a target UE 415 for UE 415-a.

[0108] In some examples, UEs 415 can use their beams 420 based on the priority schedule. For example, UE 415-a can determine, according to the priority schedule, that UE 415-a is scheduled to attempt to claim data resources through a control block (e.g., through a slot in the control resources). Based on the priority schedule, UE 415-b can use beam 420-b to receive a sidelink request from UE 415-a and determine whether it is a target UE 415 for UE 415-a. UE 415-c can be available for data transmission using some or all of the data resources (e.g., that can not have been previously scheduled by another UE 415). UE 415-c can train beam 420-c on UE 415-a according to the priority schedule and can use beam 420-c to receive a signal from UE 415-a and determine whether it is a target UE 415 for UE 415-a.

[0109] UE 415-a can attempt to schedule a sidelink data transmission to UE 415-b during a scheduled control block (e.g., a slot in a control resource). UE 415-a can communicate with UE 415-b using beam 420-a (e.g., based on a beam training procedure). During a first portion of the slot, UE 415-a can transmit a sidelink request reserving a set of data resources on beam 420-a to UE 415-b. For example, the sidelink request can indicate a set (e.g., half) of the time resources, frequency resources, spatial resources, or any combination thereof of the data resources reserved. In some examples, the sidelink request can not include an indication of which data resources are requested to be reserved, but can instead indicate an amount or quantity of resources requested to be reserved (e.g., half of the data resources regardless of the positioning or location of the data source). In some examples, the sidelink request can include an identifier, e.g., a UE 415 identifier indicating which UE 415 (e.g., UE 415-b) is the target UE 415. UE 415-b can receive the sidelink request on beam 420-b and can determine that it is the target UE 415. If UE 415-b does not have a conflicting transmission scheduled by another UE 415, among other alternative operations or conditions, and if UE 415-b does not sense interference on beam 420-b from another UE 415 above a threshold, UE 415-b can transmit a positive sidelink response (e.g., indicating a positive response to the sidelink request) on beam 420-b. The positive sidelink response can indicate available data resources. For example, if UE 415-b is scheduled to have a conflicting transmission during a portion of the data resources (e.g., during a first quarter of the data resources with respect to time and during a last quarter of the data resources with respect to time), the positive sidelink response can specify particular available data resources (e.g., half of the data resources after the first quarter of the data resources and before the last quarter of the data resources). UE 415-c can also monitor for a sidelink request on beam 420-c during the first portion of the slot.

[0110] In some examples, UE 415-c can not receive the sidelink request (e.g., based on the direction of beam 420-a). In such examples, UE 415-c can refrain from transmitting a sidelink response (e.g., a negative sidelink response) on the second portion of the slot. In some examples, UE 415-c can receive the sidelink request on the first portion of the slot. In such examples, UE 415-c can determine that it is not the target UE 415 (e.g., based on the UE 415 identifier included in the sidelink request). UE 415-c can determine that it does not object to the data transmission from UE 415-a on beam 420-a (e.g., because UE 415-c has not been scheduled to receive a data transmission over the set of data resources or because the data transmission on beam 420-a does not cause interference above a threshold for UE 415-c). Upon determining that it does not object to the data transmission on beam 420-a over the set of data resources, UE 415-c can refrain from transmitting a negative sidelink response to UE 415-a on beam 420-c on the second portion of the slot.

[0111] UE 415-a can determine whether to transmit the data transmission based on monitoring for sidelink responses from other UEs 415. For example, UE 415-a can monitor for sidelink responses from other UEs 415 on beam 420-a on the second portion of the slot. As described with respect to Figure 4 UE 415-a can receive a positive sidelink response from UE 415-b indicating that half of the data resources (e.g., located in the middle of the shared data resource pool) are available for the data transmission and can not receive a negative sidelink response from UE 415-c.

[0112] Based on these responses, UE 415-a can determine that UE 415-b is available for a data transmission over the set of resources and that no other UEs 415 (e.g., UE 415-c) object to the data transmission over beam 420-a. In such examples, UE 415-a can transmit a sidelink confirmation reserving the data resources over beam 420-a to UE 415-b in the third portion of the slot. The sidelink confirmation can indicate the data resources reserved (e.g., based on the positive sidelink response, the middle half of the data resources after the first quarter and before the last quarter of the data resources). UE 415-b can receive the sidelink confirmation and can determine that the data transmission requested in the sidelink request is confirmed for the particular data resources indicated in the sidelink confirmation. UE 415-a can transmit the data transmission to UE 415-b using the reserved set of data resources after the control resources corresponding to the set of data resources end. UE 415-b can monitor for the data transmission using beam 420-b and can successfully receive the data transmission. UE 415-c can also monitor for the sidelink confirmation over beam 420-c. If UE 415-c receives the sidelink confirmation, it can determine that the set of data resources is successfully reserved and can take that information into account on one or more subsequent control blocks.

[0113] Figure 5 An example of a wireless communications system 500 that supports sidelink resource pool allocation is shown in accordance with aspects of the present disclosure. In some examples, wireless communications system 500 can implement aspects of wireless communications systems 100, 200, and 400.

[0114] In some examples, base station 505 can communicate with one or more UEs 515. Base station 505 can transmit downlink signals on one or more beams 510. For example, base station 505 can communicate with UE 515-a on beam 510-a, can communicate with UE 515-b on beam 510-b, can communicate with UE 515-c on beam 510-c, and can communicate with UE 515-d on beam 510-d. In some examples, base station 505 can allocate shared resources for sidelink communications between UEs 515. The shared resources can include control resources and data resources, the control resources including a plurality of control blocks as described in more detail with reference to Figure 3 A UE 515 can determine a priority schedule indicating which UE 515 can attempt to claim data resources on each control block of the control resources. Base station 505 can transmit the priority schedule to UEs 515, or UEs 515 can determine the scheduled priority autonomously or based on a preconfigured priority schedule, among other examples as described in more detail with reference to Figure 3UE 515 can perform one or more beam training procedures to determine which beams 520 to use to communicate with each other. For example, UE 515-b can determine which beam 520 to use to communicate with each of UE 515-a, UE 515-c, and UE 515-d. To communicate with UE 515-a, UE 515-b can use beam 520-b to receive sidelink transmissions from UE 515-a or to transmit sidelink communications to UE 515-a.

[0115] In some examples, UE 515 can use or direct their beams 520 based on priority scheduling or previously scheduled transmissions, or both. For example, UE 515 can determine, according to priority scheduling, that UE 515-a is scheduled to attempt to claim data resources through a control block (e.g., through a time slot in a control resource). Based on the priority scheduling, UE 515-b can use beam 520-b trained to UE 515-a to determine whether it is a target UE 515 for UE 515-a. UE 515-c can be scheduled to receive another data transmission from UE 515-d on beam 520-c. That is, during a previous time slot, UE 515-d can have transmitted a sidelink request on beam 520-d to reserve half of the data resources. UE 515-c can have received the sidelink request and can have transmitted a positive sidelink response on beam 520-c to UE 515-d indicating that all of the data resources are available for transmission to UE 515-c on beam 520-c. UE 515-d can have transmitted a sidelink acknowledgement on beam 520-d to UE 515-c reserving the first half of the data resources. Thus, through the current time slot, UE 515-c can maintain beam 520-c directed to UE 515-d and can monitor for a sidelink request (e.g., from UE 515-a) on beam 520-c.

[0116] UE 515-b can receive a sidelink request from UE 515-a reserving a set of data resources during a first portion of the time slot and can determine that it is available for data transmission through the set of data resources. For example, the sidelink request can indicate that half of the data resources are reserved and UE 515-b can determine that the entire set of data resources is available for data transmission on beam 520-b. In such an example, during a second portion of the time slot, UE 515-b can transmit a positive sidelink response to UE 515-a on beam 520-b. The positive sidelink response can indicate that the entire set of data resources is available for data transmission. UE 515-b can then continue to monitor for a sidelink acknowledgement indicating that the set of data resources is reserved on beam 520-b during a third portion of the time slot.

[0117] UE 515-c can determine whether a potential transmission from UE 515-a to UE 515-b on beam 520-a would cause interference on beam 520-c above a threshold to a data transmission previously scheduled by UE 515-d. That is, UE 515-c can monitor for a sidelink request from UE 515-a using beam 520-c and can perform one or more measurements to determine the level of interference on beam 520-c. If UE 515-a successfully reserves a set of data resources for a data transmission to UE 515-b using beam 520-a, UE 515-a will transmit the scheduled data transmission to UE 515-b using the same beam 520-a. If the sidelink request on beam 520-a is received at UE 515-c on beam 520-c with a signal power above a threshold, then a potential data transmission from UE 515-a to UE 515-b on beam 520-a can also cause interference on beam 520-c above the threshold of UE 515-c when UE 515-c is receiving a data transmission from UE 515-d. However, UE 515-d can have previously scheduled a data transmission on the first half of the data resources. Because the previously scheduled data transmission can have a higher priority (e.g., according to a priority of the scheduling), UE 515-c can object to the data transmission from UE 515-a to UE 515-b if it would interfere with the previously scheduled data transmission from UE 515-d.

[0118] If the measured interference level is above the threshold, UE 515-c can determine that the data transmission from UE 515-a on beam 520-a can interfere with the previously scheduled data transmission from UE 515-d to a sufficient degree to warrant an adjustment (e.g., the interference level can degrade the previously scheduled data transmission). That is, the data transmission from UE 515-a to UE 515-b during the first half of the data resources can collide with the previously scheduled data transmission during the same portion of the data resources from UE 515-d to UE 515-c. In such examples, UE 515-c can transmit a negative sidelink response to UE 515-a. The negative sidelink response can indicate that a particular set of data resources (e.g., the first half of the data resources) are unavailable for the data transmission from UE 515-a to UE 515-b. Thus, the negative sidelink response can cause UE 515-a to not use the first half of the data resources for the data transmission to UE 515-b. In some examples, UE 515-c can transmit the negative sidelink response to UE 515-a on beam 520-c. In some examples, UE 515-c can transmit the negative sidelink response on another beam 520 (e.g., a beam directed to UE 515-a to increase the likelihood that UE 515-a will receive the negative sidelink response).

[0119] UE 515-a can determine whether to transmit a data transmission to UE 515-b based on monitoring for sidelink responses from other UEs 515. In a second portion of the slot, UE 515-a can monitor for sidelink responses from other UEs 515. UE 515-a can receive, from UE 515-b on beam 520-a, a positive sidelink response indicating that UE 515-b is available and able to receive a data transmission on beam 520-b (e.g., during any or all of the data resources). UE 515-c can refrain from transmitting a negative sidelink response if UE 515-c determines that a data transmission would not interfere above a threshold with a previously scheduled data transmission from UE 515-d on beam 520-c. In such examples, UE 515-a can transmit a sidelink confirmation on beam 520-a indicating that the set of data resources is reserved. Without receiving a negative sidelink response from any other UEs 515, UE 515-a can transmit a sidelink confirmation indicating that any data resources (e.g., a first half of the data resources, a second half of the data resources, a middle portion of the data resources including one half, or a set of non-contiguous resources totaling one half of the data resources) are reserved. Subsequently, UE 515-a can transmit a data transmission through the set of data resources to UE 515-b on beam 520-a. Similarly, UE 515-d can transmit a previously scheduled data transmission to UE 515-c on beam 520-d through a partially or fully overlapping set of data resources, in some examples. Because UE 515-c determines that such overlapping data transmissions would not result in interference above a threshold, UE 515-b and UE 515-c can successfully receive the overlapping data transmissions, effectively using the available data resources and improving system efficiency.

[0120] If UE 515-c determines that the data transmission from UE 515-a to UE 515-b will interfere with the previously scheduled data transmission from UE 515-d on beam 520-c during the first half of the data resources, UE 515-c can transmit a negative sidelink response (e.g., on beam 520-c). The negative sidelink response can indicate that the first half of the data resources are unavailable for data transmission on beam 520-a. In such examples, the sidelink confirmation can indicate a set of data resources that are not conflicting with the previously scheduled data transmission. For example, the sidelink confirmation can indicate the second half of the data resources that are reserved that are not conflicting with the first half of the data resources that are unavailable to UE 515-a. UE 515-d can transmit the previously scheduled data transmission on beam 520-d during the first half of the data resources, and UE 515-a can transmit the data transmission on beam 520-a during the second half of the data resources. UE 515-b and UE 515-c can successfully receive their respective data transmissions during their respective portions of the data resources without interfering with each other, resulting in efficient use of the data resources while reducing the likelihood of interference and transmission failure.

[0121] In some examples, the target UEs 515 and the non-target UEs 515 can be previously scheduled to transmit or receive signaling over the data resources. In such examples, the target UEs 515 can use positive sidelink responses to the requesting UE 515 to specify available resources, and the non-target UEs 515 can use negative sidelink responses to the requesting UE 515 to specify unavailable resources. For example, UE 515-c can be previously scheduled by UE 515-d to receive a data transmission during a second half of the data resources. Similarly, UE 515-b can be previously scheduled to transmit or receive a data transmission (e.g., with another UE 515). In such examples, UE 515-a can transmit a sidelink request indicating a reservation of a first half of the data resources. UE 515-b can transmit a positive sidelink response indicating that it is available for a data transmission during the first half of the data resources. UE 515-a can determine from the positive sidelink request that UE 515-b is not available for a data transmission during the second half of the data resources. UE 515-c can transmit a negative sidelink response indicating that the second half of the data resources is not available for a data transmission. UE 515-a can determine from the negative sidelink response that the second half of the data resources is not available for a data transmission on beam 520-a. In such examples, the availability of UE 515-b does not conflict with the transmission schedule of UE 515-c (e.g., UE 515-b is available for a data transmission during the first half of the data resources while UE 515-c has indicated that the second half of the data resources is not available based on a previously scheduled transmission). In such examples, UE 515-a can transmit a sidelink confirmation to UE 515-b on beam 520-a reserving the first half of the data resources for a data transmission.

[0122] In some examples, the availability of the target UEs 515 can not coincide with previously scheduled data transmissions of the non-target UEs 515. In such examples, the non-target UEs can block the requested data transmissions. For example, if UE 515-b is available for a data transmission during a first half of the data resources and not available for a data transmission during a second half of the data resources, and UE 515-c has been previously scheduled to receive a data transmission on the first half of the data resources, UE 515-c can transmit a negative sidelink response indicating that the first half of the data resources is not available for a data transmission. Upon determining that the availability of UE 515-b partially or completely overlaps with the previously scheduled data transmission for UE 515-c (e.g., based on the negative sidelink response), UE 515-a can refrain from transmitting a sidelink confirmation and can refrain from transmitting using the data resources for a given duration (e.g., one or more slots).

[0123] In some examples, the UE 515 can reserve or oppose transmission over the determined data resource segment, as described in reference to FIGs. 3-4. Figure 6 and Figure 7 are described in greater detail.

[0124] Figure 6 An example of resource pool partitioning 600 that supports sidelink resource pool allocation is shown in accordance with aspects of the present disclosure. In some examples, the resource pool partitioning 600 can be implemented by one or more aspects of the wireless communications system 100, 200, 400, or 500.

[0125] In some examples, a UE (e.g., as described in reference to FIGs. 3-4) can indicate (e.g., in a sidelink request, a sidelink response, and a sidelink confirmation) the determined data resource segment. The segment of data resources can be defined by a portion or all of the resources in any dimension (e.g., time resources or frequency resources or both, as shown in Figures 1 to 5 FIG. 4; time, frequency, or spatial resources (or all of the above), as shown in Figure 6 FIG. 5). Any combination of resource subcombinations in one or more different dimensions (time, frequency, spatial) can be used and fall within the scope of the present disclosure. Figure 7 For example, the data resources can be partitioned into segments of 6 different dimensions. As an example, the segment 605 can span (e.g., include) all data resources (e.g., all time resources and all frequency resources), as shown in

[0126] As examples, the segment 610 and the segment 615 can span (e.g., include) a portion (e.g., half) of the frequency resources and all of the time resources of the data resources, as shown in Figure 6 FIG. 5. In some examples, the segment 620, the segment 625, and the segment 630 can span (e.g., include) a portion (e.g., one-third) of the frequency resources and all of the time resources of the data resources. Figure 6 The partitioning shown in FIG. 5 includes some examples, but is not exhaustive, and other partitioning can be contemplated and fall within the scope of the present disclosure. Other segments (e.g., not shown) can be defined including smaller portions of time resources or frequency resources, among other examples. Figure 6

[0127] ​In some examples, a base station can indicate a partitioning of data resources to one or more served UEs, such as one or more of UEs 515. The partitioning can be communicated via higher layer signaling (e.g., radio resource control (RRC) signaling). In some examples, a base station can provide (e.g., periodically, semi-periodically) a UE with a partitioning of available data resources of a shared resource pool. In some examples, a base station can dynamically configure a partitioning of data resources (e.g., via a downlink control information (DCI) message). In some examples, a UE can negotiate a partitioning (e.g., using one or more sidelink channels) without additional input from a base station. In some examples, a base station can temporarily, permanently, or dynamically block one or more segments or portions of segments for other purposes (e.g., non-sidelink communications or data transmissions). For example, a base station can indicate a reservation of segment 630 (e.g., permanently, for a fixed amount of time, or until a subsequent update) for a beam monitoring procedure (e.g., periodic beam tracking, periodic beam sweeping, or beam refinement, among other examples). In such examples, all UEs attempting to schedule data resources can treat data resources in segment 630 as unavailable for data transmissions. A base station can similarly indicate to UEs unavailable resources (e.g., for beam monitoring, among other examples) where no determined segments are configured (e.g., as described with reference to FIG. 6). Figures 4 to 5

[0128] ​If attempting to reserve some or all of the data resources, the UE can reference the determined segments. For example, a first UE can transmit a sidelink request indicating the reserved segments 620. A second UE can receive the sidelink request, determine that the second UE is a target UE of the sidelink request, and determine that segments 620 are requested data resources. The second UE can determine that it has no scheduled data transmissions on segment 625, and can transmit a positive sidelink response to the first UE. In some examples, a third UE (e.g., a non-target UE) can also receive the sidelink request. The third UE can determine that it has no scheduled conflicting data transmissions on segment 625, and can refrain from transmitting a negative sidelink response. In such examples, the first UE can transmit a sidelink confirmation to the second UE reserving segment 625 for data transmissions. Alternatively, a fourth UE can have previously scheduled the third UE for data transmissions that partially or completely conflict with data transmissions from the first UE over segment 625. For example, the fourth UE can have reserved one or more of segments 605, 610, 615, or 625 for data transmissions to the third UE. In such examples, the third UE can transmit a negative sidelink response indicating the reserved segments (e.g., segments 605, 610, 615, or 625, among other examples). In such examples, the first UE can refrain from transmitting a sidelink confirmation based at least in part on the one or more sidelink responses.

[0129] In some examples, the first UE can indicate multiple segments for reservation, any of which can be sufficient for data transmission. For example, the first UE can transmit a sidelink request indicating that one or more of segment 625 or segment 630 can potentially be reserved by the first UE. The second UE can determine that it is available for data transmission in both segment 625 and segment 630, and can transmit one or more positive sidelink responses indicating both segment 625 and segment 630. The third UE (e.g., a non-target UE) can have previously been scheduled by the fourth UE for data transmission over segment 625. The third UE can therefore transmit a negative sidelink response indicating that segment 625 is not available for data transmission. In such examples, the first UE can transmit a sidelink confirmation to the second UE reserving segment 630 for data transmission. In such examples, the first UE can transmit a data transmission to the second UE over segment 630, and the third UE can receive a data transmission from the fourth UE over segment 625, thereby improving efficiency and reducing interference. However, if the second UE is also not available for data transmission during segment 630, it can transmit a positive sidelink response indicating a single segment 625. The third UE can transmit a negative sidelink response indicating segment 625. In such examples, the first UE can determine that the second UE is only available for data transmission over segment 625, but segment 625 can already be blocked by the third UE, and can refrain from transmitting a sidelink confirmation. If the third UE has been scheduled to receive a data transmission that partially or completely overlaps with any of the multiple segments indicated in the sidelink request, the third UE can transmit a negative sidelink response indicating all of the conflicting segments.

[0130] For example, the fourth UE can have previously scheduled the third UE to receive a data transmission over segment 610. The sidelink request from the first UE can indicate segment 625 or segment 630. However, a data transmission over either of segment 625 or segment 630 can conflict with the previously scheduled data transmission over segment 610. In such examples, the third UE can transmit a negative sidelink response indicating both segment 625 and segment 630. In such examples, the first UE can refrain from transmitting a sidelink confirmation.

[0131] In some examples, the sidelink request, the sidelink response, or the sidelink confirmation, among other examples, can include an indication of the segments in a payload of a message. That is, one or more bits in the sidelink request, the sidelink response, or the sidelink confirmation can indicate one or more segments.

[0132] In some examples, a sidelink request, sidelink response, or sidelink confirmation, among other examples, can implicitly indicate one or more segments. For example, a waveform of a message, one or more control resources over which a UE transmits a message, or tones over which a UE transmits a message, among other examples, can implicitly indicate a segment. A base station can configure a pool of resources, tones, or waveforms, each of which corresponds to a determined segment. In some examples, the pool of resources, tones, or waveforms, among other examples, can be determined or indicated in a standard, such that each UE is aware of the resources, tones, waveforms, or combinations thereof. In some illustrative examples, a base station can configure a UE with multiple control resources for each portion of a time slot of a control block. For example, a first portion of a time slot for transmitting a sidelink request can include 6 resources over which a UE can transmit a sidelink request. A second portion of a time slot for transmitting a sidelink request can include 6 resources for transmitting a positive sidelink request and 6 resources for transmitting a negative sidelink request. A third portion of a time slot can include 6 resources for transmitting a sidelink confirmation. To request a reservation of a second of a second set of six available segments (e.g., segment 610), a first UE can transmit a sidelink request over a second resource in a first portion of a time slot corresponding to segment 610. To transmit a positive sidelink message for segment 610, a second UE can transmit a positive sidelink response over a second resource in a second portion of a time slot corresponding to segment 610. To transmit a negative sidelink message for segment 610, a third UE can transmit a negative sidelink response over a second resource in a second portion of a time slot corresponding to segment 610. Alternatively, the third UE can transmit a negative sidelink request for another segment (e.g., segment 620) that can partially overlap with segment 610 by selecting another resource of the six available resources corresponding to segment 620. If segment 620 is available, the first UE can transmit a sidelink confirmation indicating segment 620 by selecting a resource corresponding to segment 620 during a third portion of a time slot. A UE can similarly implicitly indicate a particular segment of a data resource by using a determined waveform or tone to transmit various messages for a resource in each control block.

[0133] Even without base station coordination, a UE can apply similar implicit indication methods for data resources (e.g., in some examples, no defined partition is defined, as referenced to FIG. 6A). Figures 4 to 5That is, the preconfigured or standardized waveform, resource, or tone set and other examples can correspond to portions or segments of the data resources. For example, a first tone can indicate a first portion (e.g., one-third) of the available data resources, a second tone can indicate a second portion (e.g., the middle one-third) of the available data resources, a third tone can indicate a third portion (e.g., the last one-third) of the available data resources, a fourth tone can indicate all of the available data resources, and so on. In some examples, combinations of waveforms, resources, and tones and other examples can be configured to indicate more discrete portions of data resources or combinations of available portions.

[0134] Figure 7 An example of resource pool partitioning 700 that supports sidelink resource pool allocation is shown in accordance with aspects of the present disclosure. In some examples, resource pool partitioning 700 can implement aspects of wireless communications systems 100, 200, 400, 500, and 600.

[0135] In some examples, a UE can attempt to request a segment of data resources defined by time resources, frequency resources, or spatial resources, or any combination thereof. Each segment can be defined by time resources, frequency resources, and spatial resources (e.g., using different polarizations). For example, some signals can be H-polarized, or polarized in the horizontal plane (e.g., at 0 degrees), while other signals can be V-polarized, or polarized in the vertical plane (e.g., at 90 degrees). In some cases, different signals can be planned according to different angles (30-degree polarization, 45-degree polarization, 70-degree polarization, among other examples). Segment 715 can be defined by frequency resources, time resources, and a particular polarization (e.g., 0-degree polarization, 30-degree polarization, 45-degree polarization, 70-degree polarization, 90-degree polarization, among other examples).

[0136] A UE can transmit a sidelink request, a sidelink response, and a sidelink confirmation, among other examples, to indicate different segments. A base station or at least one UE can configure the segments, and a UE can explicitly or implicitly indicate a particular segment. For example, a first UE can transmit a sidelink request indicating segment 715 or segment 725. A second UE (e.g., a target UE of the sidelink request) can transmit a positive sidelink response indicating either segment 715 or segment 725. A third UE (e.g., a non-target UE) can be scheduled to communicate with another UE using segment 715 and segment 720, as well as segment 730. In such an example, the third UE can transmit a negative sidelink response indicating segment 715, segment 720, and segment 730. The first UE can determine that segment 725 is available for data transmission to the second UE and can transmit a sidelink confirmation indicating segment 725.

[0137] As described with respect to Figures 2 to 7As illustrated and described, a target UE can transmit a positive sidelink response to indicate its availability and refrain from transmitting a positive sidelink response to indicate its unavailability. Similarly, a non-target UE can transmit a negative sidelink response to indicate opposition to the data transmission, or can refrain from transmitting a negative sidelink response to indicate tolerance to the data transmission.

[0138] That is, a non-target UE 825 can refrain from transmitting a negative sidelink response if it has no opposition to the data transmission from the first UE that transmitted the sidelink request (e.g., previously scheduled data transmissions or interference levels, among other examples).

[0139] Additionally or alternatively, in some examples, such a signaling scheme can be changed to achieve the same effect. That is, with respect to Figures 2 to 7 Each of the techniques and methods described can also be implemented in a similar manner in which a target UE can refrain from transmitting a negative sidelink response to indicate its availability (e.g., instead of refraining from transmitting a positive sidelink response) and transmit a negative sidelink response to indicate its unavailability (e.g., instead of transmitting a positive sidelink response), and a non-target UE 825 can transmit a positive sidelink response to indicate acceptance or tolerance to the data transfer (e.g., instead of refraining from transmitting a negative sidelink response) and refrain from transmitting a positive sidelink response to indicate opposition to the data transmission (e.g., instead of transmitting a negative sidelink response).

[0140] Additionally or alternatively, in some examples, each UE can be configured to actively respond to each received sidelink request. For example, a first UE can transmit a sidelink request to a target UE. If the target UE is available for a data transmission from the first UE, the target UE can transmit a positive sidelink response to the first UE indicating any available data resource segments or sets, or a negative sidelink response indicating any unavailable data resource segments or sets, or both. A non-target UE can similarly transmit a positive sidelink response to the first UE indicating any available data resource segments or sets, or a negative sidelink response indicating any unavailable data resource segments or sets, or both. In some examples, the first UE can then determine availability of the requested data resources based on the positive and negative sidelink responses.

[0141] Figure 8A block diagram of a device 805 that supports sidelink resource pool allocation in accordance with aspects of the present disclosure is shown. The device 805 can be an example of aspects of a UE 115 as described herein. For example, the device 805 can be a transmitting UE in communication with a target UE and a non-target UE, a target UE in communication with a transmitting UE and a non-target UE, or a non-target UE in communication with a transmitting UE and a target UE. In some examples, the transmitting UE can be referred to as a first UE and the non-target UE can be referred to as a second UE or a third UE. In some examples, the non-target UE can be referred to as a first UE and the transmitting UE can be referred to as a second UE or a third UE. The device 805 can include a receiver 810, a communications manager 815, and a transmitter 820. The communications manager 815 can be implemented, at least in part, by one or both of a modem and a processor. Each of these components can be in communication with one another (for example, via one or more buses).

[0142] The receiver 810 can receive information such as packets, user data, or control information associated with various information channels (for example, control channels, data channels, and information related to sidelink resource pool allocation, etc.). Information can be passed on to other components of the device 805. The receiver 810 can be implemented, for example, by a modem, an integrated circuit, or other suitable device. The receiver 810 can utilize a single antenna, or a set of antennas. Figure 11 Described aspects of the transceiver 1120. The receiver 810 can utilize a single antenna, or a set of antennas.

[0143] The communications manager 815 can determine shared resources for communicating over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots, transmit, over the control resources, a sidelink request indicating a first set of data resources for reservation to a second UE on a transmit beam in a first portion of a slot of the set of slots, monitor, by the first UE, for one or more sidelink responses from one or more UEs over the control resources on a receive beam in a second portion of the slot, the one or more sidelink responses including one or more positive sidelink responses indicating that a first set of data resources is available for reservation, or one or more negative sidelink responses indicating that a second set of data resources is not available for reservation, or both, and determine, based on the monitoring, whether to transmit, over the control resources, a sidelink confirmation indicating a reservation of at least a portion of the first set of data resources to the second UE on the transmit beam in a third portion of the slot. The communications manager 815 can also determine shared resources for communicating over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots, monitor, over the control resources, for a sidelink request indicating a first set of data resources for reservation from a first UE on a receive beam in a first portion of a slot of the set of slots, receive, based on the monitoring, the sidelink request from the first UE in the first portion of the slot, the sidelink request indicating that a second UE is a target UE of the sidelink request, and determine, based on receiving the sidelink request, whether to transmit, over the control resources, a sidelink response to the first UE on a transmit beam in a second portion of the slot, the sidelink response including a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both. The communications manager 815 can also determine shared resources for communicating over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots, monitor, over the control resources, for a sidelink request indicating a first set of data resources for reservation from a first UE on a receive beam in a first portion of a slot of the set of slots, receive, based on the monitoring, the sidelink request from the first UE in the first portion of the slot, the sidelink request indicating that a second UE is a target UE of the sidelink request, and determine, based on receiving the sidelink request, whether to transmit, over the control resources, a sidelink response to the first UE on a transmit beam in a second portion of the slot, the sidelink response including a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both. The communications manager 815 can be an example of aspects of the communications manager 1110 described herein.

[0144] The communications manager 815, or its sub-components, can be physically located in different locations, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components. In some examples, according to various aspects of the disclosure, the communications manager 815, or its sub-components, can be a separate and distinct component in accordance with various aspects of the disclosure. In some examples, the communications manager 815, or its sub-components, can be combined with one or more other hardware components, including but not limited to an input / output (I / O) component, a transceiver, a network server, another computing device, one or more other components described in the disclosure, or a combination thereof. In some examples, the communications manager 815, or its sub-components, can be a software component running in accordance with the embodiments of the disclosure.

[0145] The transmitter 820 can transmit signals generated by other components of the device 805. In some examples, the transmitter 820 can be collocated with a receiver 810 in a transceiver component. For example, the transmitter 820 can be an example of aspects of the transceiver 1120 described with reference to Figure 11 The transmitter 820 can utilize a single antenna or a collection of antennas.

[0146] Figure 9 A block diagram of a device 905 that supports sidelink resource pool allocation in accordance with aspects of the present disclosure is shown. The device 905 can be an example of aspects of a device 805 or a UE 115. For example, the device 905 can be a transmitting UE in communication with a target UE and a non-target UE, a target UE in communication with a transmitting UE and a non-target UE, or a non-target UE in communication with a transmitting UE and a target UE. In some examples, the transmitting UE can be referred to as a first UE and the non-target UE can be referred to as a second UE or a third UE. In some examples, the non-target UE can be referred to as a first UE and the transmitting UE can be referred to as a second UE or a third UE. The device 905 can include a receiver 910, a communications manager 915, and a transmitter 940. The communications manager 915 can be implemented at least in part by one or both of a modem and a processor. Each of these components can be in communication with one another (for example, via one or more buses).

[0147] The receiver 910 can receive information such as packets, user data, or control information associated with various information channels (for example, control channels, data channels, and information related to sidelink resource pool allocation, etc.). Information can be passed on to other components of the device 905. The receiver 910 can be an example of aspects of the transceiver 1120 described with reference to Figure 11 The receiver 910 can utilize a single antenna or a collection of antennas.

[0148] Communication manager 915 can be an example of various aspects of communication manager 815. Communication manager 915 may include shared resource manager 920, sidelink request manager 925, sidelink response manager 930, and sidelink acknowledgment manager 935. Communication manager 915 can be an example of various aspects of communication manager 1110 described herein.

[0149] The Shared Resource Manager 920 can identify shared resources used for communication via one or more sidelink communication links, including control resources and data resources in a time slot set.

[0150] The sidelink request manager 925 can send a sidelink request indicating a first set of data resources to be reserved to the second UE in the first part of the time slots in the time slot set by controlling resources on the transmit beam.

[0151] The sidelink response manager 930 can be monitored by a first UE in the second part of the time slot on the receive beam by controlling resources for one or more sidelink responses from one or more UEs, the one or more sidelink responses including one or more positive sidelink responses indicating that a first set of data resources is available for reservation, or one or more negative sidelink responses indicating that a second set of data resources is not available for reservation, or both.

[0152] The sidelink acknowledgment manager 935 can, based on monitoring, determine whether to send a sidelink acknowledgment indicating the reservation of at least a portion of the first data resource set to the second UE via control resources in the third part of the time slot.

[0153] The Shared Resource Manager 920 can identify shared resources used for communication via one or more sidelink communication links, including control resources and data resources in a time slot set.

[0154] The sidelink request manager 925 can monitor, in the first part of a time slot in the time slot set, a sidelink request from a first UE indicating a first set of data resources to be reserved on the receiving beam by controlling resources, and receive a sidelink request from the first UE in the first part of the time slot based on the monitoring, the sidelink request indicating that a second UE is the target UE of the sidelink request.

[0155] The sidelink response manager 930 can determine, based on the receipt of a sidelink request, whether to send a sidelink response to the first UE in the second part of the time slot via control resources on the transmit beam. The sidelink response includes a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both.

[0156] The shared resource manager 920 can determine a shared resource for communicating over the one or more sidelink communication links, the shared resource including control resources and data resources, the control resources and the data resources being in a set of slots.

[0157] The sidelink request manager 925 can monitor, in a first portion of a slot of the set of slots, for a sidelink request from the first UE over the control resources indicating a first set of data resources for reservation.

[0158] The sidelink response manager 930 can receive the sidelink request from the first UE in the first portion of the slot based on the monitoring, the sidelink request indicating that the second UE is a target UE of the sidelink request, and determine whether to transmit, to the first UE over the control resources on a transmit beam in a second portion of the slot, a sidelink response including a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both, based on receiving the sidelink request.

[0159] The transmitter 940 can transmit signals generated by other components of the device 905. In some examples, the transmitter 940 can be collocated with a receiver 910 in a transceiver component. For example, the transmitter 940 can be an example of aspects of the transceiver 1120 described with reference to FIG. 11. The transmitter 940 can utilize a single antenna or a collection of antennas. Figure 11

[0160] Figure 10 A block diagram illustrating a communications manager 1005 that supports sidelink resource pool allocation in accordance with aspects of the present disclosure is shown. The communications manager 1005 can be an example of aspects of a communications manager 815, a communications manager 915, or a communications manager 1110 of a device, such as a UE 115 as described herein. The device can be a transmitting UE in communication with a target UE and a non-target UE, a target UE in communication with a transmitting UE and a non-target UE, or a non-target UE in communication with a transmitting UE and a target UE. In some examples, the transmitting UE can be referred to as a first UE and the non-target UE can be referred to as a second UE or a third UE. In some examples, the non-target UE can be referred to as a first UE and the transmitting UE can be referred to as a second UE or a third UE. The communications manager 1005 can include a shared resource manager 1010, a sidelink request manager 1015, a sidelink response manager 1020, a sidelink confirmation manager 1025, a resource partitioning manager 1030, and a beam monitoring manager 1035. Each of these components can communicate, directly or indirectly, with one another (e.g., via one or more buses).

[0161] ​The shared resource manager 1010 can determine shared resources for communicating over the one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots. In some examples, the shared resource manager 1010 can determine shared resources for communicating over the one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots. In some examples, the shared resource manager 1010 can determine shared resources for communicating over the one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots. In some examples, the shared resource manager 1010 can select a first set of data resources from a first set of data resources based on determining whether to transmit a sidelink acknowledgement.

[0162] In some examples, the shared resource manager 1010 can determine a set of tones, a set of waveforms, a set of control resources, or any combination thereof, in a first portion of a slot. In some examples, the shared resource manager 1010 can select a tone from the set of tones, a waveform from the set of waveforms, a control resource from the set of control resources, or any combination thereof. In some examples, the selected tone, waveform, control resource, or combination thereof, corresponds to the first set of data resources, and wherein transmitting the sidelink request indicating the first set of data resources for reservation is based on the selected tone, waveform, control resource, or combination thereof. In some examples, the shared resource manager 1010 can determine that a first set of data resources including at least a portion of the first set of data resources is unavailable for reservation. In some examples, determining whether to transmit the sidelink response is based on determining that the first set of data resources is unavailable for reservation.

[0163] In some examples, the shared resource manager 1010 can determine that the first set of data resources or the second set of data resources, or both, are not available for reservation. In some examples, determining whether to transmit the sidelink response is based on determining that the first set of data resources or the second set of data resources, or both, are not available for reservation. In some examples, the shared resource manager 1010 can determine at least a portion of a third set of data resources of the set of data resource groups reserved for beam monitoring. In some examples, determining whether to transmit the sidelink response is based on determining the third set of data resources. In some examples, the shared resource manager 1010 can determine a set of tones, a set of waveforms, a set of control resources, or any combination thereof, in a first portion of the slot. In some examples, each tone, waveform, control resource, or combination thereof, corresponds to a different set of data resources. In some examples, the shared resource manager 1010, upon receiving the sidelink request indicating the first set of data resources for reservation, determines a first tone of the set of tones, a first waveform of the set of waveforms, a first control resource of the set of control resources, or a first combination thereof, indicating the first set of data resources, where determining whether to transmit the sidelink response in a second portion of the slot is based at least in part on determining the first tone of the set of tones, the first waveform of the set of waveforms, the first control resource of the set of control resources, or the first combination thereof.

[0164] In some examples, the shared resource manager 1010 can determine that the second set of data resources is available for reservation. In some examples, the shared resource manager 1010 can determine that the second set of data resources is not available for reservation. In some examples, the shared resource manager 1010 can determine that the second set of data resources is available for transmission. In some examples, the shared resource manager 1010 can determine at least a portion of a third set of data resources of the set of data resource groups reserved for beam monitoring. In some examples, determining whether to transmit the sidelink response is based on determining the third set of data resources. In some examples, the shared resource manager 1010 can determine a set of tones, a set of waveforms, a set of control resources, or any combination thereof, in a first portion of the slot. In some examples, each tone, waveform, control resource, or combination thereof, corresponds to a different set of data resources.

[0165] In some examples, the shared resource manager 1010 can determine, upon receiving the sidelink request indicating the first set of data resources for reservation, a first tone of the set of tones, a first waveform of the set of waveforms, a first control resource of the set of control resources, or a first combination thereof, that indicates the first set of data resources. In some examples, determining whether to transmit the sidelink response in the second portion of the slot is based on determining the first tone of the set of tones, the first waveform of the set of waveforms, the first control resource of the set of control resources, or the first combination thereof. In some examples, the first set of data resources includes less than all data resources. In some examples, the first set of data resources includes less than all of the first set of data resources, or the second set of data resources includes less than all of the first set of data resources, or the second set of data resources is non-overlapping with the first set of data resources, or any combination thereof.

[0166] The sidelink request manager 1015 can transmit, over a transmit beam, a sidelink request indicating a first set of data resources for reservation by a control resource in a first portion of a slot of a set of slots to a second UE. In some examples, the sidelink request manager 1015 can monitor for a sidelink request indicating a first set of data resources for reservation by a control resource on a receive beam in a first portion of a slot of a set of slots from a first UE. In some examples, the sidelink request manager 1015 can receive the sidelink request from the first UE in the first portion of the slot based on monitoring, the sidelink request indicating that the second UE is a target UE of the sidelink request. In some examples, the sidelink request manager 1015 can monitor for a sidelink request indicating a first set of data resources for reservation by a control resource on a receive beam in a first portion of a slot of a set of slots from a first UE.

[0167] The sidelink response manager 1020 can monitor, by the first UE, for one or more sidelink responses from one or more UEs in the second portion of the slot over the control resources on the receive beam, the one or more sidelink responses including one or more positive sidelink responses indicating that the first set of data resources are available for reservation, or one or more negative sidelink responses indicating that the second set of data resources are not available for reservation, or both. In some examples, the sidelink response manager 1020 can determine whether to transmit, to the first UE in the second portion of the slot over the control resources on the transmit beam, a sidelink response including a positive sidelink response indicating that the first set of data resources are available for reservation, or a negative sidelink response indicating that the second set of data resources are not available for reservation, or both, based on receiving the sidelink request. In some examples, the sidelink response manager 1020 can monitor for receiving the sidelink request from the first UE in the first portion of the slot indicating that the second UE is a target UE of the sidelink request. In some examples, the sidelink response manager 1020 can determine whether to transmit, to the first UE in the second portion of the slot over the control resources on the transmit beam, a sidelink response including a positive sidelink response indicating that the first set of data resources are available for reservation, or a negative sidelink response indicating that the second set of data resources are not available for reservation, or both, based on receiving the sidelink request.

[0168] In some examples, the sidelink response manager 1020 can monitor for receiving a positive sidelink response from the second UE indicating that the first set of data resources are available for reservation and no negative sidelink responses indicating that the second set of data resources are not available for reservation during the second portion of the slot. In some examples, determining whether to transmit the sidelink confirmation is based on receiving the positive sidelink response and no negative sidelink responses. In some examples, the sidelink response manager 1020 can monitor for receiving a positive sidelink response from the second UE indicating that the first set of data resources are available for reservation and a negative sidelink response from the third UE indicating that the second set of data resources are not available for reservation in the second portion of the slot. In some examples, the first set of data resources do not overlap with the second set of data resources, and wherein determining whether to transmit the sidelink confirmation is based on receiving the positive sidelink response and the negative sidelink response. In some examples, the sidelink response manager 1020 can monitor for receiving a positive sidelink response from the second UE indicating that the first set of data resources are available for reservation and a negative sidelink response from the third UE indicating that the second set of data resources are not available for reservation in the second portion of the slot. In some examples, the first set of data resources at least partially overlap with the second set of data resources, wherein determining whether to transmit the sidelink confirmation is based on receiving the positive sidelink response and the negative sidelink response.

[0169] In some examples, the sidelink response manager 1020 can be based on monitoring receiving, in the second portion of the slot, a positive sidelink response from the second UE indicating that the first set of data resources is available for reservation and a negative sidelink response from the third UE indicating that the second set of data resources is not available for reservation. In some examples, the first set of data resources does not overlap with the second set of data resources, and wherein determining whether to transmit the sidelink confirmation is based on receiving the positive sidelink response and the negative sidelink response. In some examples, the sidelink response manager 1020 can be based on monitoring receiving, in the second portion of the slot, a positive sidelink response from the second UE indicating that the first set of data resources is available for reservation and no negative sidelink response indicating that the second set of data resources is not available for reservation. In some examples, determining whether to transmit the sidelink confirmation is based on receiving the positive sidelink response and no negative sidelink response. In some examples, the sidelink response manager 1020 can be based on monitoring not receiving, in the second portion of the slot, a positive sidelink response from the second UE indicating that the first set of data resources is available for reservation. In some examples, determining whether to transmit the sidelink confirmation is based on not receiving the positive sidelink response from the second UE.

[0170] In some examples, the sidelink response manager 1020 can be based on monitoring receiving, in the second portion of the slot, a positive sidelink response from the second UE indicating that the first set of data resources is available for reservation and a negative sidelink response from the third UE indicating that the second set of data resources is not available for reservation. In some examples, the first set of data resources does not overlap with the second set of data resources, and wherein determining whether to transmit the sidelink confirmation is based on receiving the positive sidelink response and the negative sidelink response. In some examples, the sidelink response manager 1020 can be based on monitoring receiving, in the second portion of the slot, a positive sidelink response from the second UE indicating that the first set of data resources is available for reservation and no negative sidelink response indicating that the second set of data resources is not available for reservation. In some examples, determining whether to transmit the sidelink confirmation is based on receiving the positive sidelink response and no negative sidelink response. In some examples, the sidelink response manager 1020 can be based on monitoring not receiving, in the second portion of the slot, a positive sidelink response from the second UE indicating that the first set of data resources is available for reservation. In some examples, determining whether to transmit the sidelink confirmation is based on not receiving the positive sidelink response from the second UE.

[0171] In some examples, the sidelink response manager 1020 can transmit, to the first UE in the second portion of the slot, a positive sidelink response indicating that the first set of data resources is available for reservation based on determining whether to transmit the sidelink response. In some examples, the sidelink response manager 1020 can refrain from transmitting a positive sidelink response in the third portion of the slot based on determining whether to transmit the sidelink response. In some examples, the sidelink response manager 1020 can transmit, to the first UE in the second portion of the slot, a positive sidelink response indicating that the first set of data resources and the second set of data resources are available for reservation based on receiving the sidelink request. In some examples, the sidelink response manager 1020 can refrain from transmitting a negative sidelink response in the second portion of the slot based on determining that the second set of data resources is available for reservation.

[0172] In some examples, the sidelink response manager 1020 can transmit, in the second portion of the slot, a negative sidelink response based on determining that the second set of data resources is not available for reservation. In some examples, the sidelink response manager 1020 can transmit, to the first UE in the second portion of the slot, a negative sidelink response indicating that the second set of data resources is not available for reservation based on receiving the sidelink request.

[0173] The sidelink confirmation manager 1025 can determine, based on the monitoring, whether to transmit, to the second UE in the third portion of the slot, a sidelink confirmation indicating reservation of at least a portion of the first set of data resources. In some examples, the sidelink confirmation manager 1025 can transmit, in the third portion of the slot, a sidelink confirmation indicating reservation of the first set of data resources based on selecting the first set of data resources. In some examples, the sidelink confirmation manager 1025 can refrain from transmitting, in the third portion of the slot, a sidelink confirmation indicating reservation of the first set of data resources based on determining whether to transmit the sidelink confirmation.

[0174] In some examples, the sidelink confirmation manager 1025 can refrain from transmitting, in the third portion of the slot, a sidelink confirmation indicating reservation of the first set of data resources based on determining whether to transmit the sidelink confirmation. In some examples, the sidelink confirmation manager 1025 can transmit, in the third portion of the slot, a sidelink confirmation indicating reservation of the first set of data resources based on selecting the first set of data resources. In some examples, the sidelink confirmation manager 1025 can monitor, in the third portion of the slot, the control resources based on transmitting the positive sidelink response to monitor for a sidelink confirmation indicating reservation of at least a portion of the first set of data resources. In some examples, the sidelink confirmation manager 1025 can receive, in the third portion of the slot, a sidelink confirmation indicating at least a portion of the first set of data resources including at least one of the first set of data resources or the second set of data resources or both based on the monitoring.

[0175] In some examples, the sidelink confirmation manager 1025 can determine, based on the monitoring, that the first UE has not transmitted a sidelink confirmation. In some examples, the sidelink confirmation manager 1025 can monitor, based on transmitting the positive sidelink response, the control resources in the third portion of the slot for the sidelink confirmation indicating reservation of at least the portion of the first set of data resources. In some examples, the sidelink confirmation manager 1025 can receive, based on the monitoring, the sidelink confirmation in the third portion of the slot indicating reservation of at least the portion of the first set of data resources including the first set of data resources or the second set of data resources, or both.

[0176] In some examples, the sidelink confirmation manager 1025 can refrain, based on the determining whether to transmit the sidelink response, from transmitting the sidelink response in the third portion of the slot. In some examples, the sidelink confirmation manager 1025 can monitor, based on refraining from transmitting the negative sidelink response, the sidelink confirmation in the third portion of the slot. In some examples, the sidelink confirmation manager 1025 can receive, based on the monitoring, the sidelink confirmation in the third portion of the slot indicating reservation of at least the portion of the first set of data resources including the first set of data resources or the second set of data resources, or both. In some examples, the sidelink confirmation manager 1025 can receive, based on transmitting the negative sidelink response, the sidelink confirmation in the third portion of the slot indicating reservation of at least the portion of the first set of data resources including the first set of data resources.

[0177] In some examples, the sidelink confirmation manager 1025 can determine, based on the monitoring of the sidelink confirmation, that the first UE has not transmitted a sidelink confirmation indicating reservation of at least the portion of the first set of data resources. In some examples, the sidelink confirmation manager 1025 can monitor, based on transmitting the negative sidelink response, the sidelink confirmation from the first UE in the third portion of the slot. In some examples, the sidelink confirmation manager 1025 can receive, based on the monitoring, the sidelink confirmation in the third portion of the slot indicating reservation of at least the portion of the first set of data resources including the first set of data resources. In some examples, the first set of data resources does not overlap with the second set of data resources. In some examples, the sidelink confirmation manager 1025 can determine, based on the monitoring of the sidelink confirmation, that the first UE has not transmitted a sidelink confirmation indicating reservation of at least the portion of the first set of data resources including the first set of data resources. In some examples, the first set of data resources and the second set of data resources at least partially overlap. In some examples, the sidelink confirmation manager 1025 can refrain, based on determining that the second set of data resources is available for transmission, from transmitting the negative sidelink response in the third portion of the slot.

[0178] The resource partition manager 1030 can determine a set of data resource groups, the set of groups including a first set of data resources and a second set of data resources, the first set of data resources including one or more groups of the set of data resource groups. In some examples, transmitting the sidelink request indicating the first set of data resources for reservation is based on determining the set of data resource groups. In some examples, the resource partition manager 1030 can select the first set of data resources and the second set of data resources from the set of data resource groups. In some examples, the sidelink request indicates the first set of data resources for reservation includes one or more of the first set of data resources or the second set of data resources. In some examples, the resource partition manager 1030 can receive, from a base station, an indication of the set of data resource groups. In some examples, determining the set of data resource groups is based on receiving the indication of the set of data resource groups. In some examples, the resource partition manager 1030 can determine a set of data resource groups, the set of groups including a first set of data resources and a second set of data resources, the first set of data resources including one or more groups of the set of data resource groups. In some examples, the sidelink request indicates the first set of data resources for reservation includes one or more of the first set of data resources or the second set of data resources.

[0179] In some examples, the resource partition manager 1030 can receive, from a base station, an indication of the set of data resource groups. In some examples, determining the set of data resource groups is based on receiving the indication of the set of data resource groups. In some examples, the resource partition manager 1030 can determine a set of data resource groups, the set of groups including a first set of data resources and a second set of data resources, the first set of data resources including one or more groups of the set of data resource groups. In some examples, the sidelink request indicates the first set of data resources for reservation includes one or more of the first set of data resources or the second set of data resources.

[0180] In some examples, the resource partitioning manager 1030 can receive, from a base station, an indication of a set of data resource groups. In some examples, determining the set of data resource groups is based on receiving the indication of the set of data resource groups. In some examples, the set of data resource groups is preconfigured at the first UE. In some examples, each data resource group includes one or more of a set of frequency resources of data resources, a set of time resources of data resources, or a set of spatial resources of data resources. In some examples, a data resource group spans one or more of all frequency resources of data resources, all time resources of data resources, or all spatial resources of data resources. In some examples, the set of data resource groups is preconfigured at the second UE. In some examples, each data resource group includes one or more of a set of frequency resources of data resources, a set of time resources of data resources, or a set of spatial resources of data resources. In some examples, a data resource group spans one or more of all frequency resources of data resources, all time resources of data resources, or all spatial resources of data resources. In some examples, the set of data resource groups is preconfigured at the third UE. In some examples, each data resource group includes one or more of a set of frequency resources of data resources, a set of time resources of data resources, or a set of spatial resources of data resources. In some examples, a data resource group spans one or more of all frequency resources of data resources, all time resources of data resources, or all spatial resources of data resources.

[0181] The beam monitoring manager 1035 can determine at least a portion of a third set of data resources of the set of data resource groups as being reserved for a beam monitoring procedure. In some examples, selecting the first set of data resources and the second set of data resources is based on determining the at least the portion of the third set. In some examples, the beam monitoring manager 1035 can determine that the second set of data resources is reserved for the beam monitoring procedure. In some examples, the beam monitoring manager 1035 can select the first set of data resources from the data resources based on determining the second set of data resources. In some examples, transmitting the sidelink request indicating the first set of data resources for reservation is based on the selection.

[0182] In some examples, the beam monitoring manager 1035 can determine that the second set of data resources is reserved for the beam monitoring procedure. In some examples, determining whether to transmit the sidelink response is based on determining the second set of data resources. In some examples, the beam monitoring manager 1035 can determine that the second set of data resources is reserved for the beam monitoring procedure, and in some examples, determining whether to transmit the sidelink response is based on determining the second set of data resources.

[0183] Figure 11A diagram of a system including a device 1105 that supports sidelink resource pool allocation is shown, in accordance with aspects of the present disclosure. The device 1105 can be an example of or include the components of a device 805, a device 905, or a UE 115. For example, the device 1105 can be a transmitting UE in communication with a target UE and a non-target UE, a target UE in communication with a transmitting UE and a non-target UE, or a non-target UE in communication with a transmitting UE and a target UE. In some examples, the transmitting UE can be referred to as a first UE and the non-target UE can be referred to as a second UE or a third UE. In some examples, the non-target UE can be referred to as a first UE and the transmitting UE can be referred to as a second UE or a third UE. The device 1105 can include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 1110, an I / O controller 1115, a transceiver 1120, an antenna 1125, memory 1130, and a processor 1140. These components can be in electronic communication via one or more buses (e.g., bus 1145).

[0184] The communication manager 1110 can determine shared resources for communicating over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots, transmit, over the control resources, a sidelink request indicating a first set of data resources for reservation to a second UE on a transmit beam in a first portion of a slot of the set of slots, monitor, by the first UE, for one or more sidelink responses from one or more UEs over the control resources on a receive beam in a second portion of the slot, the one or more sidelink responses including one or more positive sidelink responses indicating that a first set of data resources is available for reservation, or one or more negative sidelink responses indicating that a second set of data resources is not available for reservation, or both, and determine, based on the monitoring, whether to transmit, over the control resources, a sidelink confirmation indicating a reservation of at least a portion of the first set of data resources to the second UE on the transmit beam in a third portion of the slot. The communication manager 1110 can also determine shared resources for communicating over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots, monitor, over the control resources, for a sidelink request indicating a first set of data resources for reservation from a first UE on a receive beam in a first portion of a slot of the set of slots, receive, based on the monitoring, the sidelink request from the first UE in the first portion of the slot, the sidelink request indicating that a second UE is a target UE of the sidelink request, and determine, based on receiving the sidelink request, whether to transmit, over the control resources, a sidelink response to the first UE on a transmit beam in a second portion of the slot, the sidelink response including a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both. The communication manager 1110 can also determine shared resources for communicating over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots, monitor, over the control resources, for a sidelink request indicating a first set of data resources for reservation from a first UE on a receive beam in a first portion of a slot of the set of slots, receive, based on the monitoring, the sidelink request from the first UE in the first portion of the slot, the sidelink request indicating that a second UE is a target UE of the sidelink request, and determine, based on receiving the sidelink request, whether to transmit, over the control resources, a sidelink response to the first UE on a transmit beam in a second portion of the slot, the sidelink response including a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both.

[0185] I / O controller 1115 can manage the input and output signals of device 1105. I / O controller 1115 can also manage peripheral devices not integrated into device 1105. In some examples, I / O controller 1115 can represent a physical connection or port to an external peripheral device. In some examples, I / O controller 1115 can utilize, for example... This can be an operating system such as a modem, keyboard, mouse, touchscreen, or similar device, or an operating system of the same name. In other cases, the I / O controller 1115 may represent or interact with a modem, keyboard, mouse, touchscreen, or similar device. In some examples, the I / O controller 1115 may be implemented as part of a processor. In some examples, a user can interact with device 1105 via the I / O controller 1115 or via hardware components controlled by the I / O controller 1115.

[0186] As described above, transceiver 1120 can communicate bidirectionally via one or more antennas, wired or wireless links. For example, transceiver 1120 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 1120 may also include a modem for modulating packets and providing the modulated packets to the antenna for transmission, and for demodulating packets received from the antenna.

[0187] In some examples, the wireless device may include a single antenna 1125. However, in some examples, the device may have more than one antenna 1125, which may be able to transmit or receive multiple wireless transmissions simultaneously.

[0188] Memory 1130 may include random access memory (RAM) and read-only memory (ROM). Memory 1130 may store computer-readable, computer-executable code 1135, which includes instructions that, when executed, cause the processor to perform the various functions described herein. In some examples, among others, memory 1130 may include a basic input / output (I / O) system (BIOS) that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0189] The processor 1140 can include an intelligent hardware device, (e.g., a general- purpose processor, a digital signal processor (DSP), a CPU, a microcontroller, an ASIC, a field- programmable gate array (FPGA), a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some examples, the processor 1140 can be configured to operate a memory array using a memory controller. In other cases, a memory controller can be integrated into the processor 1140. The processor 1140 can be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1130) to cause the device 1105 to perform various functions (e.g., functions or tasks supporting sidelink resource pool allocation).

[0190] The code 1135 can include instructions to implement aspects of the present disclosure, including instructions to support wireless communications. The code 1135 can be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some examples, the code 1135 can not be directly executable by the processor 1140 but can cause a computer (e.g., when compiled and executed) to perform functions described herein.

[0191] Figure 12 A flow diagram illustrating a method 1200 that supports sidelink resource pool allocation in accordance with aspects of the present disclosure is shown. The operations of method 1200 can be implemented by a UE 115 or its components as described herein. For example, the operations of method 1200 can be performed by a device communications manager as described with reference to Figures 8 to 11 In some examples, a UE can execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE can perform aspects of the functions described below using special-purpose hardware. Such functionality can be provided, for example, by the device communications manager 1020 shown in FIG. 10 or by a corresponding means for performing functions of a transmitting UE in communication with a target UE and a non-target UE.

[0192] At 1205, the UE can determine shared resources for communicating over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots. The operations of 1205 can be performed according to the methods described herein. In some examples, aspects of the operations of 1205 can be performed by a shared resource manager as described with reference to Figures 8 to 11 FIG. 11. In some examples, aspects of the operations of 1205 can be performed by a shared resource manager as described with reference to

[0193] At 1210, the UE can transmit, to a second UE, a sidelink request indicating a first set of data resources reserved over a transmit beam in a first portion of a slot of the set of slots over the control resources. The operations of 1210 can be performed according to the methods described herein. In some examples, aspects of the operations of 1210 can be performed by a sidelink request transmitter as described with reference to Figures 8 to 11The described sidelink request manager to perform.

[0194] At 1215, the UE can monitor, by the first UE, for one or more sidelink responses from one or more UEs on the receive beam over the control resources in the second portion of the slot, the one or more sidelink responses including one or more positive sidelink responses indicating that the first set of data resources are available for reservation, or one or more negative sidelink responses indicating that the second set of data resources are not available for reservation, or both. The operations of 1215 can be performed according to the methods described herein. In some examples, aspects of the operations of 1215 can be performed by a sidelink response manager as described with reference to Figures 8 to 11 The described sidelink response manager to perform.

[0195] At 1220, the UE can determine whether to transmit, to the second UE, a sidelink confirmation indicating reservation of at least a portion of the first set of data resources in the third portion of the slot over the control resources based on the monitoring. The operations of 1220 can be performed according to the methods described herein. In some examples, aspects of the operations of 1220 can be performed by a sidelink confirmation manager as described with reference to Figures 8 to 11 The described sidelink confirmation manager to perform.

[0196] Figure 13 A flow diagram illustrating a method 1300 that supports sidelink resource pool allocation in accordance with aspects of the present disclosure is shown. The operations of method 1300 can be implemented by a UE 115 or its components. For example, the operations of method 1300 can be performed by a communications manager as described with reference to Figures 8 to 11 In some examples, a UE can execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE can perform aspects of the functions described below using special-purpose hardware. In some examples, the UE can be a target UE (e.g., a second UE) in communication with a transmitting UE (e.g., a first UE) and a non-target UE (e.g., a third UE).

[0197] At 1305, the UE can determine a shared resource for communication over one or more sidelink communication links, the shared resource including control resources and data resources, the control resources and the data resources being in a set of slots. The operations of 1305 can be performed according to the methods described herein. In some examples, aspects of the operations of 1305 can be performed by a shared resource manager as described with reference to Figures 8 to 11 The described shared resource manager to perform.

[0198] At 1310, the UE can monitor, over a receive beam, for a sidelink request from the first UE indicating a first set of data resources reserved in a first portion of a slot of a set of slots by a control resource. The operations of 1310 can be performed according to the methods described herein. In some examples, aspects of the operations of 1310 can be performed by a sidelink request manager as described with reference to Figures 8 to 11 FIG. 16.

[0199] At 1315, the UE can receive the sidelink request from the first UE in the first portion of the slot based on the monitoring, the sidelink request indicating that the second UE is a target UE of the sidelink request. The operations of 1315 can be performed according to the methods described herein. In some examples, aspects of the operations of 1315 can be performed by a sidelink request manager as described with reference to Figures 8 to 11 FIG. 16.

[0200] At 1320, the UE can determine whether to transmit, over a transmit beam, to the first UE in a second portion of the slot a sidelink response including a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both, based on receiving the sidelink request. The operations of 1320 can be performed according to the methods described herein. In some examples, aspects of the operations of 1320 can be performed by a sidelink response manager as described with reference to Figures 8 to 11 FIG. 16.

[0201] Figure 14 A method 1400 that supports sidelink resource pool allocation is shown in FIG. 14. The operations of method 1400 can be implemented by a UE 115 or its components. For example, the operations of method 1400 can be performed by a communications manager as described with reference to Figures 8 to 11 FIG. 16. In some examples, a UE can execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE can perform aspects of the functions described below using special-purpose hardware. In some examples, the UE can be a non-target UE in communication with a transmitting UE and a target UE. In some examples, the transmitting UE can be referred to as a first UE and the non-target UE can be referred to as a second UE or a third UE. In some examples, the non-target UE can be referred to as a first UE and the transmitting UE can be referred to as a second UE or a third UE.

[0202] At 1405, the UE can determine shared resources for communicating over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a set of slots. The operations of 1405 can be performed according to the methods described herein. In some examples, aspects of the operations of 1405 can be performed by a shared resource manager as described with reference to Figures 8 to 11 FIG. 19.

[0203] At 1410, the UE can monitor, in a first portion of a slot of the set of slots, for a sidelink request from a third UE on a receive beam over the control resources indicating a first set of data resources reserved. The operations of 1410 can be performed according to the methods described herein. In some examples, aspects of the operations of 1410 can be performed by a sidelink request manager as described with reference to Figures 8 to 11 FIG. 19.

[0204] At 1415, the UE can receive, based on the monitoring, a sidelink request from the third UE in the first portion of the slot, the sidelink request indicating that the second UE is a target UE of the sidelink request. The operations of 1415 can be performed according to the methods described herein. In some examples, aspects of the operations of 1415 can be performed by a sidelink response manager as described with reference to Figures 8 to 11 FIG. 19.

[0205] At 1420, the UE can determine, based on receiving the sidelink request, whether to transmit, in a second portion of the slot, a sidelink response to the third UE on a transmit beam over the control resources, the sidelink response including a positive sidelink response indicating that a first set of data resources is available for reservation, or a negative sidelink response indicating that a second set of data resources is not available for reservation, or both. The operations of 1420 can be performed according to the methods described herein. In some examples, aspects of the operations of 1420 can be performed by a sidelink response manager as described with reference to Figures 8 to 11 FIG. 19.

[0206] implementations, and that the operations and the steps can be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods can be combined.

[0207] Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system can be described with reference to the techniques described herein, it should be readily understood that the techniques described herein are applicable to other telecommunication systems, including other cellular systems and / or non-cellular wireless communication systems. Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems can be described with reference to the techniques described herein, it should be readily understood that the techniques described herein are applicable to other telecommunication systems, including other cellular systems and / or non-cellular wireless communication systems. For example, the techniques described can be applicable to various other wireless communication systems such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.

[0208] Information and signals described herein can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that can be referenced throughout the description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0209] The various illustrative logical blocks, modules, components, and circuits described in connection with the disclosure herein can be implemented or performed with a general purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general purpose processor can be a microprocessor, but in the alternative, the processor can be any processor, controller, microcontroller, or state machine. The processor can also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0210] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions can also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.

[0211] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium can be any available medium that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0212] As used herein, including in the claims “or” as used in a list of items (for example, a list of items prefaced by a phrase such as “at least one of’ or “one or more of’) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” can be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on.”

[0213] In the drawings, like reference numerals can be used to denote similar components throughout the several views. Further, various components of the same type can be distinguished by following the convention of placing the primary reference number in the hundreds column and a secondary reference number in the tens column of the reference number. For example, 102, 102a, 102b, and 102c can represent various components of the same type. If only the primary reference number is used in the specification, the description is applicable to any one of the components of the same type having the same primary reference number irrespective of the secondary reference number or other subsequent reference numbers.

[0214] The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that can be implemented or that are within the scope of the claims. The term “example” is used herein to mean “serving as an example, instance, or illustration,” and not “preferred” or “advantageous over other examples.” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, can be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

[0215] The description herein is presented to enable any person skilled in the art to practice or use the present disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other variations without departing from the scope of the disclosure. Thus, the present disclosure is not intended to be limited to the examples described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a first user equipment (UE), comprising: determining shared resources for communicating over one or more sidelink communication links, the shared resources comprising control resources and data resources, the control resources and the data resources being in a plurality of slots; determining a set of data resource groups, the set of groups comprising a first group of data resources and a second group of data resources, wherein a first set of data resources comprises one or more groups of the set of data resource groups; transmitting, to a second UE, a sidelink request indicating the first set of data resources for reservation over the control resources on a transmit beam and based at least in part on determining the set of data resource groups, in a first portion of a slot of the plurality of slots; monitoring, by the first UE, for one or more sidelink responses from one or more UEs over the control resources on a first receive beam in a second portion of the slot, the one or more sidelink responses comprising one or more positive sidelink responses indicating that the first group of data resources is available for reservation, or one or more negative sidelink responses indicating that the second group of data resources is unavailable for reservation, or both; based at least in part on the monitoring by the first UE, receiving the negative sidelink response from a third UE in response to: a signal power at which the sidelink request is received at the third UE on a second receive beam being above a threshold, and a data transmission of the third UE having been scheduled on the second receive beam; and determining, based at least in part on the monitoring by the first UE, whether to transmit a sidelink confirmation indicating reservation of at least a portion of the first set of data resources to the second UE over the control resources in a third portion of the slot.

2. The method of claim 1, further comprising: based at least in part on the monitoring by the first UE, receiving a positive sidelink response from the second UE indicating that the first group of data resources is available for reservation and receiving a negative sidelink response from the third UE indicating that the second group of data resources is unavailable for reservation in the second portion of the slot, wherein the first group of data resources does not overlap with the second group of data resources, and wherein determining whether to transmit the sidelink confirmation is based at least in part on receiving the positive sidelink response and the negative sidelink response; based at least in part on determining whether to transmit the sidelink confirmation, selecting the first set of data resources from the first group of data resources; and based at least in part on selecting the first set of data resources, transmitting the sidelink confirmation indicating reservation of the first set of data resources in the third portion of the slot.

3. The method of claim 1, further comprising: receiving, in the second portion of the slot, an affirmative sidelink response from the second UE indicating that the first set of data resources is available for reservation and a negative sidelink response from a third UE indicating that the second set of data resources is not available for reservation based at least in part on monitoring by the first UE, wherein the first set of data resources at least partially overlap the second set of data resources, and wherein determining whether to transmit the sidelink confirmation is based at least in part on receiving the affirmative sidelink response and the negative sidelink response; and avoiding transmitting, in the third portion of the slot, the sidelink confirmation indicating reservation of the first set of data resources based at least in part on determining whether to transmit the sidelink confirmation.

4. The method of claim 1, further comprising: receiving, in the second portion of the slot, no affirmative sidelink response from the second UE indicating that the first set of data resources is available for reservation based at least in part on monitoring by the first UE, wherein the first set of data resources at least partially overlap the first set of data resources, and wherein determining whether to transmit the sidelink confirmation is based at least in part on not receiving the affirmative sidelink response from the second UE; and avoiding transmitting, in the third portion of the slot, the sidelink confirmation indicating reservation of the first set of data resources based at least in part on determining whether to transmit the sidelink confirmation.

5. The method of claim 1, further comprising: selecting the first set of data resources and the second set of data resources from the set of data resource groups, wherein the sidelink request indicates the first set of data resources for reservation comprises one or more of the first set of data resources or the second set of data resources.

6. The method of claim 5, further comprising: receiving, in the second portion of the slot, an affirmative sidelink response from the second UE indicating that the first set of data resources and the second set of data resources are available for reservation and a negative sidelink response from a third UE indicating that the second set of data resources is not available for reservation based at least in part on monitoring by the first UE, wherein the first set of data resources do not overlap the second set of data resources, and wherein determining whether to transmit the sidelink confirmation is based at least in part on receiving the affirmative sidelink response and the negative sidelink response; selecting the first set of data resources from the first set of data resources based at least in part on determining whether to transmit the sidelink confirmation; and transmitting, in the third portion of the slot, the sidelink confirmation indicating reservation of at least a portion of the first set of data resources comprising the first set of data resources based at least in part on selecting the first set of data resources.

7. The method of claim 5, further comprising: receiving, in the second portion of the slot, an affirmative sidelink response from the second UE indicating that the first set of data resources is available for reservation and a negative sidelink response from a third UE indicating that the second set of data resources is not available for reservation based at least in part on monitoring by the first UE, wherein the first set of data resources and the second set of data resources at least partially overlap, and wherein determining whether to transmit the sidelink confirmation is based at least in part on receiving the affirmative sidelink response and the negative sidelink response; and avoiding transmitting, in the third portion of the slot, the sidelink confirmation indicating reservation of at least a portion of the first set of data resources based at least in part on determining whether to transmit the sidelink confirmation.

8. The method of claim 5, further comprising: receiving, in the second portion of the slot, an affirmative sidelink response from the second UE indicating that the first set of data resources is available for reservation and a negative sidelink response from a third UE indicating that the second set of data resources is not available for reservation based at least in part on monitoring by the first UE, wherein the first set of data resources and the second set of data resources do not overlap, and wherein determining whether to transmit the sidelink confirmation is based at least in part on receiving the affirmative sidelink response and the negative sidelink response; selecting the first set of data resources from the first set of data resources based at least in part on determining whether to transmit the sidelink confirmation; and transmitting, in the third portion of the slot, the sidelink confirmation indicating reservation of the first set of data resources including the at least a portion of the first set of data resources based at least in part on selecting the first set of data resources.

9. The method of claim 5, further comprising: receiving, in the second portion of the slot, an affirmative sidelink response from the second UE indicating that the first set of data resources is available, and no negative sidelink responses indicating that the second set of data resources is not available for reservation based at least in part on monitoring by the first UE, wherein determining whether to transmit the sidelink confirmation is based at least in part on receiving the affirmative sidelink response and not receiving any negative sidelink responses; selecting the first set of data resources from the first set of data resources based at least in part on determining whether to transmit the sidelink confirmation; and transmitting, in the third portion of the slot, the sidelink confirmation indicating reservation of at least a portion of the first set of data resources based at least in part on selecting the first set of data resources.

10. The method of claim 5, further comprising: receiving, in the second portion of the slot, no affirmative sidelink response from the second UE indicating that the first set of data resources is available for reservation based at least in part on monitoring by the first UE, wherein determining whether to transmit the sidelink confirmation is based at least in part on not receiving the affirmative sidelink response from the second UE; and ​ avoid transmitting, in the third portion of the slot, the sidelink acknowledgement indicating the first set of data resources being reserved based at least in part on determining whether to transmit the sidelink acknowledgement.

11. The method of claim 5, further comprising: determining at least a portion of a third set of data resources of the set of data resource sets to be reserved for a beam monitoring procedure, wherein the first set of data resources and the second set of data resources are selected based at least in part on the at least the portion of the third set being determined.

12. The method of claim 1, further comprising receiving, from a base station, an indication of the set of data resource sets, wherein determining the set of data resource sets is based at least in part on receiving the indication of the set of data resource sets.

13. The method of claim 1, further comprising: determining a set of tones, a set of waveforms, a set of control resources, or any combination thereof, in the first portion of the slot; and selecting a tone from the set of tones, a waveform from the set of waveforms, a control resource from the set of control resources, or any combination thereof, wherein the selected tone, waveform, control resource, or combination thereof corresponds to the first set of data resources, and wherein transmitting the sidelink request indicating the first set of data resources for reservation is based at least in part on the selected tone, waveform, control resource, or combination thereof.

14. A method for wireless communication at a first user equipment (UE), comprising: determining shared resources for communication over one or more sidelink communication links, the shared resources comprising control resources and data resources, the control resources and the data resources being in a plurality of slots; determining a set of data resource groups, the group set comprising a first group of data resources and a second group of data resources, the first set of data resources comprising one or more groups of the set of data resource groups; monitoring, in a first portion of a slot of the plurality of slots, over a receive beam for a sidelink request from a second UE indicating the first set of data resources for reservation over the control resources, the sidelink request comprising one or more of the first group of data resources or the second group of data resources, wherein a data transmission of the first UE has been scheduled over the receive beam; based at least in part on the monitoring, receiving, in the first portion of the slot, the sidelink request from the second UE, the sidelink request indicating a third UE as a target UE of the sidelink request; and determining, based at least in part on receiving the sidelink request, whether to transmit, in a second portion of the slot, a sidelink response to the second UE over a transmit beam over the control resources, the sidelink response comprising a positive sidelink response indicating that the first group of data resources is available for reservation, or a negative sidelink response indicating that the second group of data resources is not available for reservation, or both, wherein the negative sidelink response is transmitted in response to a signal power of the sidelink request received over the receive beam being above a threshold.

15. The method of claim 14, further comprising: ​ determining that the second set of data resources is not available for reservation; and transmitting the negative sidelink response in the second portion of the slot based at least in part on determining that the second set of data resources is not available for reservation.

16. The method of claim 15, further comprising receiving a sidelink confirmation indicating a reservation of at least a portion of the first set of data resources comprising the first set of data resources in a third portion of the slot based at least in part on transmitting the negative sidelink response.

17. The method of claim 15, further comprising determining that the second UE has not transmitted the sidelink confirmation indicating a reservation of at least a portion of the first set of data resources based at least in part on monitoring for a sidelink confirmation.

18. The method of claim 14, further comprising: transmitting the negative sidelink response indicating that the second set of data resources is not available for reservation to the second UE in the second portion of the slot based at least in part on receiving the sidelink request; and monitoring for a sidelink confirmation from the second UE in a third portion of the slot based at least in part on transmitting the negative sidelink response.

19. The method of claim 18, further comprising receiving the sidelink confirmation indicating a reservation of at least a portion of the first set of data resources comprising the first set of data resources in the third portion of the slot based at least in part on the monitoring, wherein the first set of data resources does not overlap with the second set of data resources.

20. The method of claim 18, further comprising determining that the second UE has not transmitted the sidelink confirmation indicating a reservation of at least a portion of the first set of data resources comprising the first set of data resources based at least in part on monitoring for the sidelink confirmation, wherein the first set of data resources and the second set of data resources at least partially overlap.

21. The method of claim 14, further comprising: determining that the second set of data resources is available for transmission; and avoiding transmitting the negative sidelink response in a third portion of the slot based at least in part on determining that the second set of data resources is available for transmission.

22. The method of claim 14, further comprising determining at least a portion of a third set of data resources of the set of data resource groups reserved for beam monitoring, wherein determining whether to transmit the sidelink response is based at least in part on determining the third set of data resources.

23. The method of claim 14, further comprising receiving an indication of the set of data resource groups from a base station, wherein determining the set of data resource groups is based at least in part on receiving the indication of the set of data resource groups.

24. The method of claim 14, further comprising: determining a set of tones, a set of waveforms, a set of control resources, or any combination thereof in the first portion of the slot, wherein each tone, waveform, control resource, or combination thereof corresponds to a different set of data resources; and determining a set of tones, a set of waveforms, a set of control resources, or any combination thereof in the first portion of the slot, wherein each tone, waveform, control resource, or combination thereof corresponds to a different set of data resources; and on a first transmit beam and based at least in part on determining the set of data resource groups, a sidelink request indicating a first set of data resources for reservation in a first portion of a slot of the plurality of slots; 25. An apparatus for wireless communication at a first user equipment (UE), comprising: means for determining shared resources for communication over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a plurality of slots; means for determining a set of data resource groups, the set of groups including a first group of data resources and a second group of data resources, wherein a first set of data resources includes one or more groups of the set of data resource groups; means for transmitting, by the first UE, a sidelink request indicating a first set of data resources for reservation over the control resources on a first receive beam in a second portion of the slot, the sidelink request being received at a second UE with a signal power that is above a threshold and a data transmission of the second UE being scheduled on the second receive beam; means for determining, based at least in part on the monitoring by the first UE, whether to transmit a sidelink confirmation indicating a reservation of at least a portion of the first set of data resources to the second UE over the control resources in a third portion of the slot.

26. An apparatus for wireless communication at a first user equipment (UE), comprising: means for determining shared resources for communication over one or more sidelink communication links, the shared resources including control resources and data resources, the control resources and the data resources being in a plurality of slots; means for determining a set of data resource groups, the set of groups including a first group of data resources and a second group of data resources, wherein a first set of data resources includes one or more groups of the set of data resource groups; ​ ​ means for monitoring, in a first portion of a slot of the plurality of slots, for a sidelink request from a second UE indicating a first set of data resources reserved over a receive beam by the control resources, the sidelink request including one or more of the first set of data resources or the second set of data resources, where a data transmission of the first UE has been scheduled on the receive beam; means for receiving, based at least in part on the monitoring, the sidelink request from the second UE in the first portion of the slot, the sidelink request indicating a third UE as a target UE of the sidelink request; and means for determining, based at least in part on receiving the sidelink request, whether to transmit a sidelink response to the second UE on a transmit beam by the control resources in a second portion of the slot, the sidelink response including a positive sidelink response indicating that the first set of data resources is available for reservation, or a negative sidelink response indicating that the second set of data resources is not available for reservation, or both, wherein the means for transmitting the negative sidelink response in response to a signal power of the sidelink request received on the receive beam being above a threshold.

27. A computer readable medium having program code recorded thereon, wherein, The program code can be executed by one or more processors of a user equipment to cause the processor to perform the method of any of claims 1-13.

28. A computer readable medium having program code recorded thereon, wherein, The program code can be executed by one or more processors of a user equipment to cause the processor to perform the method of any of claims 14-24.

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