Selection and reselection of resources for transmission

Abstract

Various aspects of the present disclosure generally relate to wireless communications. Various aspects generally relate to a configuration for reselecting resources for transmission of one or more transport blocks (TBs) for sidelink communications. Some aspects, more specifically, relate to providing a configuration indicating whether to reselect resources for transmitting one or more TBs in relation to unavailability of one or more resources of a first set of resources selected for transmission of the one or more TBs. In some aspects, the configuration may indicate whether to transmit the one or more TBs via available resources of the first set of resources (e.g., remaining resources that are not unavailable) or to reselect a second set of resources for transmission of the one or more TBs.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This patent application claims priority to Greek Patent Application No. 20230100132, entitled "SELECTION AND RESELECTION OF RESOURCES FOR TRANSMISSION," filed February 17, 2023, which is assigned to the assignee of the present application. The disclosure of the prior application is considered part of, and incorporated by reference into, this patent application.

[0002] Aspects of the present disclosure relate generally to wireless communications, and more particularly to techniques and apparatus for selection and reselection of resources for transmission. [Background technology]

[0003] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth or transmit power). Examples of such multiple-access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single-Carrier Frequency Division Multiple Access (SC-FDMA) systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is a set of extensions to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP®).

[0004] The above multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that allows different UEs to communicate on a city, national, regional, or global scale. New Radio (NR), sometimes referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by 3GPP®. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving service, utilizing new spectrum, and using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink and CP-OFDM or single-carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink, as well as better integration with other open standards that support beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As demand for mobile broadband access continues to grow, further improvements in LTE, NR, and other radio access technologies remain useful.

[0005] In some networks, a wireless communication device (WCD) may select a resource in a sidelink channel for transmission of a transport block (TB). The WCD may evaluate the availability of the resource after selecting the resource and before transmitting the TB over the resource. If the WCD determines that the resource is unavailable, the WCD may reselect a new resource for transmission of the TB.

[0006] In some networks, a WCD may select a set of resources in a sidelink channel for transmission of one or more TBs. The set of resources may have an amount of resources greater than the amount needed to transmit one or more TBs. However, the WCD typically reselects a new set of resources based on a determination of the unavailability of any resource in the set of resources. Summary of the Invention

[0007] Certain aspects described herein relate to a method of wireless communication performed by a wireless communication device (WCD). The method may include, after selecting a first set of resources for transmission of one or more transport blocks (TBs), performing one or more evaluations of availability of the first set of resources. The method may include, in relation to unavailability of one or more resources of the first set of resources, performing one of the following: transmitting the one or more TBs via one or more available slots of the first set of resources; reselecting a second set of resources for transmission of the one or more TBs and transmitting the one or more TBs via the second set of resources; or reselecting a third set of resources for transmission of a first subset of the one or more TBs and transmitting the second subset of the one or more TBs on a subset of the first set of resources.

[0008] Some aspects described herein relate to a WCD for wireless communication. The wireless communication device may include a processing system including one or more processors and one or more memories coupled to the one or more processors. The processing system may be configured to cause the WCD to perform one or more evaluations of availability of the first set of resources after selecting a first set of resources for transmission of one or more TBs. The processing system may be configured to cause the WCD to perform one of the following in relation to unavailability of one or more resources of the first set of resources: transmitting one or more TBs via one or more available slots of the first set of resources; reselecting a second set of resources for transmission of one or more TBs and transmitting the one or more TBs via the second set of resources; or reselecting a third set of resources for transmission of a first subset of one or more TBs and transmitting the second subset of one or more TBs on a subset of the first set of resources.

[0009] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a WCD. The set of instructions, when executed by one or more processors of the WCD, may cause the WCD to perform one or more evaluations of availability of the first set of resources after selecting a first set of resources for transmission of one or more TBs. The set of instructions, when executed by one or more processors of the WCD, may cause the WCD to perform one of the following in relation to unavailability of one or more resources of the first set of resources: transmitting one or more TBs via one or more available slots of the first set of resources; reselecting a second set of resources for transmission of one or more TBs and transmitting the one or more TBs via the second set of resources; or reselecting a third set of resources for transmission of a first subset of one or more TBs and transmitting the second subset of one or more TBs on a subset of the first set of resources.

[0010] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for, after selecting a first set of resources for transmission of one or more TBs, performing one or more evaluations of availability of the first set of resources. The apparatus may include means for performing, in relation to unavailability of one or more resources of the first set of resources, one of transmitting the one or more TBs via one or more available slots of the first set of resources, reselecting a second set of resources for transmission of the one or more TBs and transmitting the one or more TBs via the second set of resources, or reselecting a third set of resources for transmission of a first subset of the one or more TBs and transmitting the second subset of the one or more TBs on a subset of the first set of resources.

[0011] Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, network node, network entity, wireless communication device, or processing system as fully described with reference to and illustrated by the drawings and this specification.

[0012] The foregoing has outlined rather broadly the features and technical advantages of examples according to the present disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The concepts and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent structures do not depart from the scope of the appended claims. The properties of the concepts disclosed herein, both their organization and method of operation, together with associated advantages, will be better understood from the following description when considered in conjunction with the accompanying figures. Each of the figures is provided for purposes of illustration and description, and not as a definition of the limits of the claims.

[0013] To understand in detail the above-listed features of the present disclosure, a more detailed description briefly summarized above may be had by reference to aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the description may admit of other equally valid aspects, and that the accompanying drawings illustrate only some typical aspects of the present disclosure and therefore should not be considered as limiting its scope. The same reference numbers in different drawings may identify the same or similar elements. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 illustrates an example of a wireless network according to the present disclosure. [Figure 2] FIG. 1 illustrates an example network node in communication with user equipment (UE) in a wireless network, according to the present disclosure. [Figure 3] FIG. 1 illustrates an example of sidelink communication in accordance with the present disclosure. [Figure 4] FIG. 1 illustrates an example of sidelink and access link communications according to the present disclosure. [Figure 5] FIG. 1 illustrates an example diagram associated with resource selection for transmission of a transport block (TB) over a sidelink channel, according to the present disclosure. [Figure 6] FIG. 1 is a diagram of an example associated with the selection of resources for transmission of a TB over a sidelink channel according to the present disclosure. [Figure 7] FIG. 1 is a diagram of one example associated with the selection and reselection of resources for transmission according to the present disclosure. [Figure 8] FIG. 1 is a diagram of one example associated with the selection and reselection of resources for transmission according to the present disclosure. [Figure 9] FIG. 1 illustrates an example process performed by, for example, a wireless communication device, according to the present disclosure. [Figure 10]FIG. 1 is a diagram of an exemplary apparatus for wireless communication according to the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0015] Various aspects of the present disclosure will now be described more fully with reference to the accompanying drawings. However, the present disclosure may be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Those skilled in the art will appreciate that the scope of the present disclosure is intended to encompass any aspect of the present disclosure disclosed herein, whether implemented independently or in combination with any other aspect of the present disclosure. For example, an apparatus may be implemented or a method may be practiced using any amount of the aspects described herein. Furthermore, the scope of the present disclosure is intended to encompass such an apparatus or method practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the present disclosure described herein. Any aspect of the present disclosure disclosed herein may be embodied by one or more elements of a claim.

[0016] Several aspects of a telecommunications system will now be presented with reference to various apparatus and techniques. These apparatus and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, or algorithms (collectively referred to as "elements"). These elements may be realized using hardware, software, or a combination of hardware and software. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

[0017] Various aspects generally relate to a configuration for reselection of resources for transmission of one or more transport blocks (TBs) for sidelink communication. Some aspects, more specifically, relate to providing a configuration indicating whether to reselect resources for transmitting one or more TBs in relation to unavailability of one or more resources of a first set of resources selected for transmission of the one or more TBs. In some aspects, the configuration may indicate whether to transmit the one or more TBs via available resources of the first set of resources (e.g., remaining resources that are not unavailable) or to reselect a second set of resources for transmission of the one or more TBs.

[0018] In some aspects, a wireless communication device (WCD) may reselect a second set of resources based at least in part on insufficient available resources to transmit one or more TBs, a threshold percentage of the first set of resources being unavailable, or an amount of consecutive slots failing to meet a threshold amount, among other examples. In some embodiments, the WCD may reselect the second set of resources to replace all of the first set of resources. In some other embodiments, the WCD may transmit a first subset of one or more TBs over available resources of the first set of resources and a second subset of one or more TBs over the second set of resources.

[0019] Certain aspects of the subject matter described in this disclosure may be implemented to achieve one or more of the following potential advantages: In some embodiments, the described techniques may be used to use available resources of a set of resources to transmit all or a subset of TBs when efficient. In this way, a WCD may use available resources rather than wasting them and reselecting a new full set of resources. This may improve spectral efficiency and improve latency in the associated network by conserving network resources that might otherwise have been wasted or selected to be in the new full set of resources.

[0020] 1 illustrates an example of a wireless network in accordance with the present disclosure. Wireless network 100 may be or include, among other examples, an element of a 5G (e.g., NR) network or a 4G (e.g., Long Term Evolution (LTE)) network. Wireless network 100 may include one or more network nodes 110 (illustrated as network node (NN) 110a, network node 110b, network node 110c, and network node 110d), user equipment (UE) 120 or multiple UEs 120 (illustrated as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), or other network entities. Network node 110 is an entity that communicates with UE 120. As shown, network node 110 may include one or more network nodes. For example, network node 110 may be an aggregated network node, meaning that the aggregated network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or unit). As another example, network node 110 may be a disaggregated network node (sometimes referred to as a disaggregated base station), meaning that network node 110 is configured to utilize a protocol stack that is physically or logically distributed among two or more nodes (e.g., one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs)).

[0021] In some embodiments, the network node 110 is or includes a network node, such as a RU, that communicates with the UE 120 over a radio access link. In some embodiments, the network node 110 is or includes a network node, such as a DU, that communicates with other network nodes 110 over a fronthaul link or a midhaul link. In some embodiments, the network node 110 is or includes a network node, such as a CU, that communicates with other network nodes 110 over a midhaul link or with a core network over a backhaul link. In some embodiments, the network node 110 (e.g., an aggregated network node 110 or a disaggregated network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, or one or more DUs. The network nodes 110 may include, for example, an NR network node, an LTE network node, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point or transmission reception point (TRP), a DU, a RU, a CU, a network mobility element, a core network node, a network element, network equipment, or a RAN node. In some embodiments, the network nodes 110 may interconnect to each other or to one or more other network nodes 110 within the wireless network 100 through various types of fronthaul, midhaul, or backhaul interfaces, such as direct physical connections, air interfaces, or virtual networks, using any suitable transport network.

[0022] Each network node 110 may provide communication coverage for a particular geographic area. In the 3rd Generation Partnership Project (3GPP®), the term "cell" can refer to the coverage area of ​​a network node 110 or a network node subsystem serving this coverage area, depending on the context in which the term is used.

[0023] A network node 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, or another type of cell. A macro cell may cover a relatively large geographic area (e.g., a few kilometers in radius) and may allow unrestricted access by UEs 120 with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs 120 with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs 120 that have an association with the femto cell (e.g., UEs 120 in a closed subscriber group (CSG)). A network node 110 for a macro cell may be referred to as a macro network node. A network node 110 for a pico cell may be referred to as a pico network node. A network node 110 for a femto cell may be referred to as a femto network node or a home network node.

[0024] Wireless network 100 may be a heterogeneous network including different types of network nodes 110, such as macro network nodes, pico network nodes, femto network nodes, or relay network nodes. These different types of network nodes 110 may have different transmit power levels, different coverage areas, or different susceptibility to interference in wireless network 100. For example, macro network nodes may have high transmit power levels (e.g., 5-40 watts), while pico network nodes, femto network nodes, and relay network nodes may have lower transmit power levels (e.g., 0.1-2 watts). In the example shown in FIG. 1 , network node 110a may be a macro network node for macro cell 102a, network node 110b may be a pico network node for pico cell 102b, and network node 110c may be a femto network node for femto cell 102c. The network nodes may support one or multiple (e.g., three) cells. In some embodiments, a cell may not necessarily be stationary, and the geographic area of ​​a cell may move according to the location of a network node 110 that is mobile (eg, a mobile network node).

[0025] In some aspects, the term “base station” or “network node” may refer to an aggregated base station, a non-aggregated base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof. For example, in some aspects, a “base station” or “network node” may refer to a CU, DU, RU, a Near-Real Time (RT) RAN Intelligent Controller (RIC), or a Non-Real Time (Non-RT) RIC. In some aspects, the term “base station” or “network node” may refer to one device configured to perform one or more functions, such as those described herein with respect to network node 110. In some aspects, the term “base station” or “network node” may refer to multiple devices configured to perform one or more functions. For example, in some distributed systems, multiple different devices (which may be located in the same geographic location or different geographic locations) may each be configured to perform at least a portion of the functions or to replicate the performance of at least a portion of the functions, and the term "base station" or "network node" may refer to any one or more of those different devices. In some aspects, the term "base station" or "network node" may refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions may be instantiated on a single device. In some aspects, the term "base station" or "network node" may refer to one of the base station functions and not another base station function. In this manner, a single device may include two or more base stations.

[0026] A network controller 130 may be coupled to or in communication with a set of network nodes 110 and may provide coordination and control for these network nodes 110. The network controller 130 may communicate with the network nodes 110 via backhaul communication links. The network nodes 110 may communicate with each other directly or indirectly via wireless or wired backhaul communication links. In some aspects, the network controller 130 may be or may include a CU or a core network device.

[0027] In some embodiments, cells may not necessarily be stationary, and the geographic area of ​​a cell may move according to the location of a network node 110 that is mobile (e.g., a mobile network node). In some embodiments, network nodes 110 may interconnect with each other or with one or more other network nodes 110 or network nodes (not shown) in wireless network 100 using any suitable transport network, through various types of backhaul interfaces, such as direct physical connections or virtual networks.

[0028] The wireless network 100 may include one or more relay stations. A relay station is an entity that may receive data transmissions from an upstream station (e.g., the network node 110 or the UE 120) and send data transmissions to a downstream station (e.g., the UE 120 or the network node 110). A relay station may relay transmissions for other UEs 120, and may also be a UE 120. In the embodiment shown in FIG. 1, network node 110d (e.g., a relay network node) may communicate with network node 110a (e.g., a macro network node) and UE 120d to facilitate communication between network node 110a (e.g., a macro network node) and UE 120d. A network node 110 that relays communications may be referred to as a relay station, a relay network node, or a relay.

[0029] The UEs 120 may be dispersed throughout the wireless network 100, and each UE 120 may be fixed or mobile. The UEs 120 may include, for example, an access terminal, a terminal, a mobile station, or a subscriber unit. The UEs 120 may be a cellular phone (e.g., a smartphone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., a smart ring or smart bracelet)), an entertainment device (e.g., a music device, a video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, a UE function of a network node, or any other suitable device configured to communicate over a wireless medium.

[0030] Some UEs 120 may be considered machine-type communication (MTC) UEs or evolved or enhanced machine-type communication (eMTC) UEs. MTC UEs or eMTC UEs may include, for example, a robot, a drone, a remote device, a sensor, a meter, a monitor, or a location tag that may communicate with a network node, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered Internet-of-Things (IoT) devices or implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered customer premises equipment. UEs 120 may be included within a housing that houses components of the UE 120, such as a processor component or a memory component. In some embodiments, the processor component and the memory component may be coupled together. For example, the processor component (e.g., one or more processors) and the memory component (e.g., a memory) may be operatively coupled, communicatively coupled, electronically coupled, or electrically coupled.

[0031] In general, any quantity of wireless networks 100 may be deployed in a given geographic area. Each wireless network 100 may support a particular RAT and may operate on one or more frequencies. A RAT may be referred to as a radio technology or air interface. A frequency may be referred to as a carrier or frequency channel. To avoid interference between wireless networks of different RATs, each frequency may support a single RAT within a given geographic area. In some cases, NR or 5G RAT networks may be deployed.

[0032] In some embodiments, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using network node 110 as an intermediary to communicate with each other) using one or more sidelink channels. For example, the UEs 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (which may include, e.g., vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, or vehicle-to-pedestrian (V2P) protocols), or mesh networks. In such embodiments, the UEs 120 may perform scheduling operations, resource selection operations, or other operations described elsewhere herein as being performed by network node 110.

[0033] Devices of wireless network 100 may communicate using an electromagnetic spectrum, which may be subdivided by frequency or wavelength into various classes, bands, or channels. For example, devices of wireless network 100 may communicate using one or more operating bands. In 5G NR, two initial operating bands have been identified, designated by the frequency ranges FR1 (410 MHz to 7.125 GHz) and FR2 (24.25 GHz to 52.6 GHz). Although portions of FR1 are above 6 GHz, FR1 is often referred to (interchangeably) as the “sub-6 GHz” band in various documents and papers. Similar nomenclature issues may arise with respect to FR2, which is often referred to (interchangeably) as the “millimeter wave” band in documents and papers, despite being different from the extremely high frequency (EHF) band (30 GHz to 300 GHz) identified as the “millimeter wave” band by the International Telecommunications Union (ITU).

[0034] Frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified operating bands for these mid-band frequencies as a frequency range designated FR3 (7.125 GHz to 24.25 GHz). Frequency bands falling within FR3 may inherit FR1 or FR2 characteristics, thus effectively extending the features of FR1 or FR2 to mid-band frequencies. However, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as frequency ranges designated FR4a or FR4-1 (52.6 GHz to 71 GHz), FR4 (52.6 GHz to 114.25 GHz), and FR5 (114.25 GHz to 300 GHz). Each of these higher frequency bands falls within the EHF band.

[0035] With the above examples in mind, unless otherwise specified, the term "sub-6 GHz," as used herein, may broadly refer to frequencies that may be below 6 GHz, may be within FR1, or may include mid-band frequencies. Furthermore, unless otherwise specified, the term "millimeter wave," as used herein, may broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a, or FR4-1, or FR5, or may be within the EHF band. Frequencies included within these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, or FR5) may be modified, and it is contemplated that the techniques described herein are applicable to those modified frequency ranges.

[0036] In some aspects, a WCD (e.g., a UE) may include a communications manager 140. As described in more detail elsewhere herein, communications manager 140, after selecting a first set of resources for transmission of one or more TBs, may perform one or more evaluations of availability of the first set of resources and, in relation to unavailability of one or more resources of the first set of resources, perform one of the following: transmitting one or more TBs via one or more available slots of the first set of resources; reselecting a second set of resources for transmission of one or more TBs and transmitting the one or more TBs via the second set of resources; or reselecting a third set of resources for transmission of a first subset of one or more TBs and transmitting the second subset of one or more TBs on a subset of the first set of resources. Additionally or alternatively, communications manager 140 may perform one or more other operations described herein.

[0037] FIG. 2 illustrates an example network node 200 communicating with a UE in a wireless network in accordance with the present disclosure. The network node may correspond to the network node 110 of FIG. 1. Similarly, the UE may correspond to the UE 120 of FIG. 1. The network node 110 may be equipped with a set of antennas 234a through 234t, such as T antennas (T≧1). The UE 120 may be equipped with a set of antennas 252a through 252r, such as R antennas (R≧1). The network node 110 illustrated in FIG. 2 includes one or more radio frequency components, such as the antennas 234 and a modem 232. In some examples, the network node 110 may include an interface, a communication component, or another component that facilitates communication with the UE 120 or another network node. Some network nodes 110 may not include radio frequency components that facilitate direct communication with the UE 120, such as one or more CUs or one or more DUs.

[0038] At network node 110, transmit processor 220 may receive data destined for UE 120 (or set of UEs 120) from data source 212. Transmit processor 220 may select one or more modulation and coding schemes (MCSs) for UE 120 based at least in part on one or more channel quality indicators (CQIs) received from that UE. Network node 110 may process (e.g., encode and modulate) data for UE 120 based at least in part on the MCS(es) selected for UE 120 and provide data symbols to UE 120. Transmit processor 220 may process system information and control information (e.g., CQI requests, grants, or higher layer signaling) (e.g., for semi-static resource partitioning information (SRPI)) and provide overhead symbols and control symbols. The transmit processor 220 may generate reference symbols for a reference signal (e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS)) and a synchronization signal (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​the data symbols, control symbols, overhead symbols, or reference symbols, if applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems), denoted as modems 232a through 232t. For example, each output symbol stream may be provided to a modulator component (denoted as MOD) of the modem 232.Each modem 232 may process a respective output symbol stream using a respective modulator component (e.g., for OFDM) to obtain an output sample stream. Each modem 232 may further process (e.g., convert to analog, amplify, filter, or upconvert) the output sample stream using a respective modulator component to obtain a downlink signal. Modems 232a through 232t may transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas), depicted as antennas 234a through 234t.

[0039] At the UE 120, the set of antennas 252 (depicted as antennas 252a through 252r) may receive downlink signals from the network node 110 or other network nodes 110 and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems), depicted as modems 254a through 254r. For example, each received signal may be provided to a demodulator component (depicted as DEMOD) of the modem 254. Each modem 254 may condition (e.g., filter, amplify, downconvert, or digitize) the received signal using its respective demodulator component to obtain input samples. Each modem 254 may further process the input samples (e.g., for OFDM) using the demodulator component to obtain received symbols. A MIMO detector 256 may obtain the received symbols from the modems 254, perform MIMO detection on the received symbols, if applicable, and provide the detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 260, and provide decoded control and system information to the controller / processor 280. The term “controller / processor” may refer to one or more controllers or one or more processors. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, or a CQI parameter, among other examples. In some embodiments, one or more components of the UE 120 may be included within a housing 284.

[0040] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the network node 110 via the communication unit 294.

[0041] One or more antennas (e.g., antennas 234a-234t or antennas 252a-252r) may include or be contained within, among other examples, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays. An antenna panel, antenna group, set of antenna elements, or antenna array may include (in a single housing or multiple housings) one or more antenna elements, a set of coplanar antenna elements, a set of non-coplanar antenna elements, or one or more antenna elements coupled to one or more transmitting or receiving components, such as one or more components of FIG. 2.

[0042] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, or CQI). The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, if applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the network node 110. In some embodiments, the modem 254 of the UE 120 may include a modulator and demodulator. In some embodiments, the UE 120 includes a transceiver. The transceiver may include any combination of the antenna(s) 252, the modem(s) 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, or the TX MIMO processor 266. The transceiver may be used by a processor (eg, controller / processor 280) and memory 282 to perform aspects of any of the methods described herein.

[0043] In the network node 110, uplink signals from the UE 120 or other UEs may be received by an antenna 234, processed by a modem 232 (e.g., a demodulator component, denoted as DEMOD, of the modem 232), detected by a MIMO detector 236, if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to a controller / processor 240. The network node 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The network node 110 may include a scheduler 246 for scheduling one or more UEs 120 for downlink or uplink communications. In some embodiments, the modem 232 of the network node 110 may include a modulator and a demodulator. In some embodiments, the network node 110 includes a transceiver. The transceiver may include any combination of antenna(s) 234, modem(s) 232, MIMO detector 236, receive processor 238, transmit processor 220, or TX MIMO processor 230. The transceiver, via a processor (e.g., controller / processor 240) and memory 242, may be used to perform any aspect of the methods described herein.

[0044] The controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, or any other component(s) of FIG. 2 may perform one or more techniques associated with selecting and reselecting resources for transmission, as described in more detail elsewhere herein. For example, the controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, or any other component(s) of FIG. 2 may perform or direct the operations of, for example, process 900 of FIG. 9 or other processes as described herein. The memory 242 and the memory 282 may store data and program codes for the network node 110 and the UE 120, respectively. In some examples, the memory 242 or the memory 282 may include a non-transitory computer-readable medium that stores one or more instructions (e.g., code or program code) for wireless communication. For example, the one or more instructions, when executed by one or more processors of the network node 110 or the UE 120 (e.g., directly or after compilation, translation, or interpretation), may cause the one or more processors, the UE 120, or the network node 110 to perform or direct operations of, for example, process 900 of FIG. 9 or other processes described herein. In some examples, executing the instructions may include running the instructions, translating the instructions, compiling the instructions, or interpreting the instructions, among other examples.

[0045] In some aspects, the WCD includes means for performing, after selection of a first set of resources for transmission of one or more TBs, one or more evaluations of availability of the first set of resources, or means for performing, in relation to unavailability of one or more resources of the first set of resources, one of: transmitting one or more TBs via one or more available slots of the first set of resources; reselecting a second set of resources for transmission of one or more TBs and transmitting the one or more TBs via the second set of resources; or reselecting a third set of resources for transmission of a first subset of one or more TBs and transmitting the second subset of one or more TBs on a subset of the first set of resources. In some aspects, the means for the WCD to perform the operations described herein may include, for example, one or more of communications manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.

[0046] The deployment of a communication system, such as a 5G NR system, can be configured in multiple ways with various components or parts. In a 5G NR system or network, a network node, network entity, network mobility element, RAN node, core network node, network element, base station, or network equipment may be implemented in a centralized or disaggregated architecture. For example, a base station (e.g., a Node B (NB), evolved NB (eNB), NR base station, 5G NB, access point (AP), TRP, or cell, among other examples), or one or more units (or one or more components) performing base station functionality, may be implemented as a centralized base station (also known as a standalone base station or monolithic base station) or a disaggregated base station. A "network entity" or a "network node" may refer to a disaggregated base station or may refer to one or more units (e.g., one or more CUs, one or more DUs, or one or more RUs) of a disaggregated base station.

[0047] An aggregated base station (e.g., an aggregated network node) may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or unit). A disaggregated base station (e.g., a disaggregated network node) may be configured to utilize a protocol stack that is physically or logically distributed among two or more units (e.g., one or more CUs, one or more DUs, or one or more RUs). In some embodiments, a CU may be implemented within a network node, and one or more DUs may be collocated with the CU or, alternatively, geographically or virtually distributed throughout one or more other network nodes. A DU may be implemented to communicate with one or more RUs. Each of the CU, DU, and RU may also be implemented as a virtual unit, such as a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU), among other examples.

[0048] The operation or network design of a base station type may take into account the aggregation characteristics of base station functionality. For example, disaggregated base stations may be utilized in an IAB network, an open radio access network (O-RAN, such as a network configuration supported by the O-RAN Alliance), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)) to facilitate scaling of the communication system by separating base station functionality into one or more units that may be deployed separately. A disaggregated base station may include functionality implemented across two or more units in various physical locations as well as functionality implemented virtually in at least one unit, which may allow flexibility in network design. Various units of a disaggregated base station may be configured for wired or wireless communication with at least one other unit of the disaggregated base station.

[0049] FIG. 3 illustrates one embodiment of sidelink communication 300 in accordance with the present disclosure.

[0050] 3, a first UE 305-1 may communicate with a second UE 305-2 (and one or more other UEs 305) via one or more sidelink channels 310. The UEs 305-1 and 305-2 may communicate using one or more sidelink channels 310 for P2P communication, D2D communication, V2X communication (which may include, for example, V2V, V2I, or V2P communication), or mesh networking. In some aspects, a UE 305 (e.g., UE 305-1 or UE 305-2) may correspond to one or more other UEs described elsewhere herein, such as the UE 120. In some aspects, the one or more sidelink channels 310 may use a PC5 interface or operate in a higher frequency band (e.g., the 5.9 GHz band). Additionally or alternatively, the UE 305 may use global navigation satellite system (GNSS) timing to synchronize the timing of transmission time intervals (TTIs) (e.g., frames, subframes, slots, or symbols).

[0051] 3, the one or more sidelink channels 310 may include a physical sidelink control channel (PSCCH) 315, a physical sidelink shared channel (PSSCH) 320, or a physical sidelink feedback channel (PSFCH) 325. The PSCCH 315 may be used to communicate control information, similar to a physical downlink control channel (PDCCH) or a physical uplink control channel (PUCCH) used for cellular communication with the network node 110 over the access link or access channel. The PSSCH 320 may be used to communicate data, similar to a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH) used for cellular communication with the network node 110 over the access link or access channel. For example, the PSCCH 315 may carry sidelink control information (SCI) 330, which may indicate various control information used for sidelink communication, such as one or more resources (e.g., time resources, frequency resources, or spatial resources), in which case a TB 335 may be carried on the PSSCH 320. The TB 335 may include data.The PSFCH 325 may be used to communicate sidelink feedback 340 such as hybrid automatic repeat request (HARQ) feedback (e.g., acknowledgement or negative acknowledgement (ACK / NACK) information), transmit power control (TPC), or scheduling request (SR).

[0052] Although shown on the PSCCH 315, in some aspects the SCI 330 may include multiple communications in different stages, such as a first stage SCI (SCI-1) and a second stage SCI (SCI-2). SCI-1 may be transmitted on the PSCCH 315. SCI-2 may be transmitted on the PSSCH 320. SCI-1 may include, for example, an indication of one or more resources (e.g., time resources, frequency resources, or spatial resources) on the PSSCH 320, information for decoding sidelink communications on the PSSCH, a quality of service (QoS) priority value, a resource reservation period, a PSSCH DMRS pattern, an SCI format for SCI-2, a beta offset for SCI-2, a quantity of PSSCH DMRS ports, or an MCS. SCI-2 may include information associated with data transmission on PSSCH 320, such as a HARQ process ID, a new data indicator (NDI), a source identifier, a destination identifier, or a channel state information (CSI) reporting trigger.

[0053] In some aspects, one or more sidelink channels 310 may use a resource pool. For example, a scheduling assignment (e.g., included in the SCI 330) may be transmitted in a subchannel using specific resource blocks (RBs) over time. In some aspects, a data transmission (e.g., on the PSSCH 320) associated with a scheduling assignment may occupy adjacent RBs in the same subframe as the scheduling assignment (e.g., using frequency division multiplexing). In some aspects, a scheduling assignment and associated data transmission are not transmitted on adjacent RBs.

[0054] In some aspects, the UE 305 may operate using a sidelink transmission mode (e.g., Mode 1), in which case resource selection or scheduling is performed by the network node 110 (e.g., a base station, a CU, or a DU). For example, the UE 305 may receive a grant (e.g., in downlink control information (DCI) or in a radio resource control (RRC) message, for a configured grant, etc.) from the network node 110 (e.g., directly or via one or more network nodes) for sidelink channel access or scheduling. In some aspects, the UE 305 may operate using a transmission mode (e.g., Mode 2), in which case resource selection or scheduling is performed by the UE 305 (e.g., rather than by the network node 110). In some aspects, the UE 305 may perform resource selection or scheduling by sensing channel availability for transmission. For example, the UE 305 may measure RSSI parameters (e.g., sidelink-RSSI (S-RSSI) parameters) associated with various sidelink channels, may measure RSRP parameters (e.g., PSSCH-RSRP parameters) associated with various sidelink channels, or may measure RSRQ parameters (e.g., PSSCH-RSRQ parameters) associated with various sidelink channels, and may select a channel for transmission of a sidelink communication based at least in part on the measurement(s).

[0055] Additionally or alternatively, the UE 305 may perform resource selection or scheduling using the SCI 330 received in the PSCCH 315, which may indicate occupied resources or channel parameters. Additionally or alternatively, the UE 305 may perform resource selection or scheduling by determining a channel busy ratio (CBR) associated with various sidelink channels, which may be used for rate control (e.g., by indicating the maximum amount of resource blocks the UE 305 may use for a particular set of subframes).

[0056] In a transmission mode in which resource selection or scheduling is performed by the UE 305, the UE 305 may generate a sidelink grant and transmit the grant within the SCI 330. The sidelink grant may indicate one or more parameters (e.g., transmission parameters) to be used for the next sidelink transmission, such as one or more resource blocks on the PSSCH 320 (e.g., for the TB 335), one or more subframes to be used for the next sidelink transmission, or the MCS to be used for the next sidelink transmission. In some aspects, the UE 305 may generate a sidelink grant indicating one or more parameters for semi-persistent scheduling (SPS), such as the periodicity of the sidelink transmission. Additionally or alternatively, the UE 305 may generate a sidelink grant for event-driven scheduling, such as for on-demand sidelink messages.

[0057] As noted above, Figure 3 is provided as an example. Other examples may differ from those described with respect to Figure 3.

[0058] FIG. 4 illustrates one embodiment of sidelink and access link communications 400 in accordance with the present disclosure.

[0059] As shown in Figure 4, a transmitter (Tx) / receiver (Rx) UE 405 and an Rx / Tx UE 410 may communicate with each other via a sidelink, as described above with respect to Figure 3. As further shown, in some sidelink modes, the network node 110 may communicate with the Tx / Rx UE 405 (e.g., directly or via one or more network nodes), such as via a first access link. Additionally or alternatively, in some sidelink modes, the network node 110 may communicate with the Rx / Tx UE 410 (e.g., directly or via one or more network nodes), such as via a first access link. The Tx / Rx UE 405 or the Rx / Tx UE 410 may correspond to one or more UEs described elsewhere herein, such as the UE 120 of Figure 1. Thus, a direct link between UEs 120 (e.g., via a PC5 interface) may be referred to as a sidelink, and a direct link between network node 110 and UE 120 (e.g., via a Uu interface) may be referred to as an access link. Sidelink communications may be transmitted over the sidelink, and access link communications may be transmitted over the access link. Access link communications may be either downlink communications (from network node 110 to UE 120) or uplink communications (from UE 120 to network node 110).

[0060] As noted above, Figure 4 is provided as an example. Other examples may differ from those described with respect to Figure 4.

[0061] 5 is a diagram of an embodiment 500 associated with the selection of resources for transmission of a TB over a sidelink channel in accordance with the present disclosure. As shown in FIG. 5, a WCD (e.g., UE 120) may attempt to transmit using resources of an unlicensed spectrum or other sidelink channel, where the WCD attempts to reserve resources from an available pool of resources.

[0062] 5, a WCD may sense resource occupancy or availability in a sensing window 502. Within the sensing window, the WCD may monitor resource reservations, such as RSRP reserved transmission (Tx(1)) 504 or RSRP reserved transmission (Tx(2)) 506. The WCD may process signaling sensed during T(proc,0) 510 to identify reservations within the sensing window 502.

[0063] The resource selection trigger 512 may identify resources expected to be available for transmission of a communication. The resource selection trigger 512 may occur at time n, causing the WCD to examine the sensing window 502 to identify a set of candidate resources in a resource selection window 514 for transmission of a communication. The WCD may identify available resources based at least in part on measuring the RSRP of the RSRP reservation transmission 504 or 506. For example, the WCD may identify a resource as available based at least in part on the RSRP of the associated RSRP reservation transmission failing to meet an RSRP threshold. Conversely, the WCD may identify a resource as unavailable (or occupied) based at least in part on the RSRP of the associated RSRP reservation transmission meeting an RSRP threshold. The WCD's physical (PHY) layer may measure the RSRP and provide an indication of available resources to the WCD's medium access control (MAC) layer.

[0064] The resource selection window 514 may begin at a time T(1) 516 after the resource selection trigger 512 and may end upon expiration of a packet delay budget associated with the communication. Time T(1) may be based at least in part on the capabilities of the WCD. The length of time T(1) 516 and the resource selection window 514 may be defined as time T(2) 518.

[0065] The WCD (e.g., a MAC layer of the WCD) may select (e.g., randomly) a resource for transmitting the TB associated with the resource selection trigger 512 and the packet delay budget. For example, the WCD may select the selected resource 520 for transmission of the TB.

[0066] At a time T(3) before the selected resource 520, the WCD may perform a reevaluation check 522 to determine whether the selected resource 520 is still available. For example, the WCD may check any new reservations collected between the time of selection and T(3). If the reselection check fails (e.g., the selected resource 520 is currently unavailable), the WCD may perform a reselection of a new resource for the transmission of the TB.

[0067] 6 is a diagram of an embodiment 600 associated with the selection of resources for transmission of a TB over a sidelink channel in accordance with the present disclosure. As shown in FIG. 6, a WCD (e.g., UE 120) may attempt to transmit using resources of an unlicensed spectrum or other sidelink channel, where the WCD attempts to reserve resources from an available pool of resources.

[0068] 6, the WCD may monitor reservations 614 during a sensing window 602. The WCD may receive a trigger 604 for transmission of a TB within the sensing window 602. The WCD may randomly select a resource for transmission of the TB within a selection window 606. For example, the WCD may select a first selected resource 608 for transmission of the TB.

[0069] At time T(3) 610 before the first selected resource 608, the WCD may perform a re-evaluation check to determine whether the first selected resource 608 is still available. If the first selected resource 608 is unavailable, the WCD may reselect the first updated selected resource 612. In such an embodiment, the WCD should perform a new re-evaluation at time T(3) before the first updated selected resource 612.

[0070] Some networks may support multi-consecutive slot transmissions (MCSt) over sidelink channels. MCSt may improve throughput under channel access constraints. For example, MCSt may allow a WCD to transmit for a maximum channel occupancy time (COT) duration (e.g., 6 ms after Type 1 channel access via listen-before-talk (LBT) is cleared).

[0071] Some networks support enhanced mode 2 reservations, where N1 slots are selected for N2 TBs, where N1 > N2. In this way, the reservation may select more resources than are needed for the transmission of a certain amount of TBs. In some networks, preemption of a single slot resource is sufficient to trigger reselection.

[0072] In some aspects described herein, a WCD may be configured for reselection of resources for transmission of one or more TBs for sidelink communication. Some aspects, more specifically, relate to using a configuration indicating whether to transmit one or more TBs in relation to unavailability of one or more resources of a first set of resources selected for transmission of the one or more TBs. In some aspects, the configuration may indicate whether to transmit the one or more TBs via available resources of the first set of resources (e.g., remaining resources that are not unavailable) or to reselect a second set of resources for transmission of the one or more TBs.

[0073] In some aspects, the WCD may reselect the second set of resources based at least in part on insufficient available resources to transmit one or more TBs, a threshold percentage of the first set of resources being unavailable, or an amount of consecutive slots failing to meet a threshold amount, among other examples. In some aspects, the WCD may reselect the second set of resources to replace all of the first set of resources. In some aspects, the WCD may transmit a first subset of one or more TBs over available resources of the first set of resources and a second subset of one or more TBs over the second set of resources.

[0074] In some aspects, the WCD may reselect a second set of resources, at least in part, based on an availability check such as a reevaluation check failure or an LBT failure, among other examples. After an availability check failure, the WCD may evaluate whether the available resources among the first set of resources are sufficient to service a target amount of TBs (e.g., N2 < N1 number of TBs). If not, reselection is triggered. In some aspects, when an availability check fails, the amount of available resources is updated to N1’ = N1 - x and compared to N2. In some aspects, the inability to satisfy the MCSt configuration may trigger reselection, at least in part, based on (e.g., at least in part based on a multi-slot resource including a gap).

[0075] In some aspects, the reselection trigger may be based on the value N1’ of the “remaining slots” that are still available from the first set of resources. For example, reselection may be triggered, at least in part, based on N1’ < N2. In another embodiment, reselection may be triggered, at least in part, based on N1’ being less than K% of N2 (e.g., where K% may be predefined or configurable in the communication protocol). In some aspects, N1’ = 0 is a valid case. In a further embodiment, reselection may be triggered, at least in part, based on N1’ including fewer than L consecutive slots, where L may depend on N2 (e.g., L = N2), or L may depend on N1.

[0076] In some aspects, when reselection is triggered, the WCD may perform a reselection of an amount of resources that may be less than or equal to the amount of resources in the first set of resources. For example, the WCD may reselect the entire multi-slot resources (N1 slots) of the first set of resources. The selection of the first set of resources may be canceled and a selection of a second set of resources may be issued. In some aspects, the multi-slot resources may already be depleted and the WCD may have nothing to cancel. In some aspects, the WCD may reselect an amount of resources associated with a shortage of resources needed to transmit one or more TBs. For example, the selection of the first set of resources may be maintained and a selection of the second set of resources may be issued for the amount of slots in the first set of resources that are unavailable or for the amount of slots that is the difference between the amount of available slots (N1') of the first set of resources and the amount of resources needed to transmit one or more TBs (N2). In some embodiments, for a given value of N1', reselection is triggered for multi-slot resources of at least length N2-N1' (e.g., K×(N2-N1')).

[0077] In some aspects, in the event of an LBT failure (contributing to triggering reselection), reselection may occur at a configured time. For example, reselection may occur at the time transmission is intended to begin. This is the time at which an LBT failure is recorded. Alternatively, reselection may occur when the WCD discovers that it is not possible to complete the countdown associated with the LBT in time to begin transmission at a selected slot boundary. The WCD may check whether the remaining countdown can be completed before transmission and, if not, update the amount of remaining selected slot. If the remaining resources are sufficient to transmit one or more TBs, the WCD may shift the target for beginning transmission to the next slot boundary and eventually trigger reselection if a threshold is met or the remaining resources are insufficient to transmit one or more TBs. In some aspects, reselection may occur at any clear channel assessment (CCA) attempt (e.g., every 9 microseconds) or periodically (e.g., every K CCA attempts or every slot).

[0078] Certain aspects of the subject matter described in this disclosure may be implemented to achieve one or more of the following potential advantages: In some embodiments, the described techniques may be used to use available resources of a set of resources to transmit all or a subset of TBs when efficient. In this way, a WCD may use available resources rather than wasting them and reselecting a new full set of resources. This may improve spectral efficiency and improve latency in the associated network by conserving network resources that might otherwise have been wasted or selected to be in the new full set of resources.

[0079] 7 is a diagram of an example embodiment 700 associated with the selection and reselection of resources for transmission in accordance with the present disclosure. As shown in FIG. 7, a WCD (e.g., UE 120) may communicate with one or more additional WCDs in a sidelink channel of a wireless network (e.g., wireless network 100). The WCD and the one or more additional WCDs may communicate using a sidelink communication protocol.

[0080] As shown in a first operation 705, the WCD may select a first set of resources for transmission of one or more TBs. In some aspects, the first set of resources includes more resources than are needed to transmit the one or more TBs to be transmitted over the first set of resources.

[0081] As shown in second operation 710, the WCD may transmit an indication of selection of the first set of resources. For example, the WCD may transmit an RSRP Reservation Tx message to reserve the first set of resources. Alternatively, the WCD may not transmit an indication of selection to one or more additional WCDs.

[0082] As shown in third operation 715, the WCD may perform one or more evaluations of the availability of the first set of resources. The WCD may perform the one or more evaluations after selecting the first set of resources. In some aspects, the WCD may perform a different evaluation check for each resource in the first set of resources. For example, the WCD may perform a first re-evaluation check associated with a first resource of the one or more resources and a second re-evaluation check associated with a second resource of the one or more resources. In such an embodiment, detecting unavailability of the one or more resources includes detecting availability of the first resource based on the first re-evaluation check and detecting availability of the second resource based on the second re-evaluation check. In this manner, availability of different resources in the first set of resources may be detected separately.

[0083] In some aspects, the one or more evaluations of the availability of the one or more resources may include performing a reassessment check associated with the one or more resources. In some aspects, the WCD may perform the reassessment check at periodic intervals or based at least in part on channel conditions (e.g., channel busy ratio (CBR) measurements or LBT failures).

[0084] In some aspects, the one or more evaluations of the availability of the one or more resources may include performing an LBT check associated with the one or more resources. In some aspects, the WCD may detect a failure of the LBT check and detect unavailability of the one or more resources at the start of a first resource in time of the one or more unavailable resources. In some aspects, the WCD may detect unavailability of the one or more resources before the start of a first resource in time based on a successful LBT check not being able to complete before the start of the first resource in time (e.g., upon identifying that the countdown of the LBT check is greater than the amount of time remaining before the start of the first resource in time). In some aspects, the WCD may detect unavailability of the one or more resources after a failed CCA attempt. In some aspects, the WCD may detect unavailability of the one or more resources at periodic times after determining that a successful LBT check not being able to complete before the start of the first resource in time.

[0085] As shown in a fourth operation 720, the WCD may detect the unavailability of one or more resources in the first set of resources.

[0086] The operations 725-740 described below may be performed as alternatives based at least in part on detecting the unavailability of one or more resources in the first set of resources. For example, the fifth operation 725 may be a first alternative, the sixth operation 730 may be a second alternative, and the seventh operation 735 and the ninth operation 740 may be third alternatives, among other examples. The WCD may be configured to perform only one of the alternatives or may be configured with conditions for selecting one of the alternatives.

[0087] As shown in fifth operation 725, the WCD may transmit one or more TBs over one or more available slots (e.g., available resources) of the first set of resources. In some aspects, the WCD may transmit one or more TBs over one or more available slots of the first set of resources based at least in part on the one or more available slots being sufficient to transmit one or more TBs, a ratio of an amount of available resources of the first set of resources to an amount of resources needed for transmission of the one or more TBs satisfying a threshold ratio, or a contiguous amount of available resources of the first set of resources satisfying a threshold amount of contiguous resources, among other examples. In some aspects, the criteria for transmitting one or more TBs over one or more available resources may be indicated in a communication protocol or via a configuration associated with a sidelink channel.

[0088] As shown in a sixth operation 730, the WCD may reselect a second set of resources for transmission of one or more TBs. In some aspects, the WCD may expect to transmit one or more TBs over the second set of one or more resources. However, the WCD may perform one or more evaluations of the availability of the second set of resources before transmitting the one or more TBs over the second set. If the second set of resources becomes unavailable, the WCD may reselect resources again.

[0089] In some aspects, the WCD may reselect a second set of resources for transmission of one or more TBs based at least in part on an amount of available resources in the first set of resources being insufficient for transmission of one or more TBs, a ratio of an amount of available resources in the first set of resources to an amount of resources required for transmission of one or more TBs not meeting a threshold ratio, or an amount of consecutive resources of available resources in the first set of resources not meeting a threshold amount of consecutive resources.

[0090] In some aspects, the WCD may cancel available resources of the first set of resources based at least in part on reselecting the second set of resources. In some aspects, the WCD may cancel available resources of the first set of resources via transmission of an instruction to cancel the reservation of the available resources.

[0091] As shown in seventh operation 735, the WCD may reselect a third set of one or more resources for transmission of the first subset of TBs. In some aspects, the amount of resources in the third set of resources is based at least in part on the amount of one or more resources in the first set of resources that are unavailable or the amount of additional resources needed to transmit one or more TBs based on the unavailability of the one or more resources that are unavailable.

[0092] In some aspects, the WCD may reselect a third set of resources for transmission of one or more TBs based at least in part on an amount of available resources in the first set of resources being insufficient for transmission of one or more TBs, a ratio of an amount of available resources in the first set of resources to an amount of resources required for transmission of one or more TBs not meeting a threshold ratio, or an amount of consecutive resources of available resources in the first set of resources not meeting a threshold amount of consecutive resources.

[0093] As shown in eighth operation 740, the WCD may transmit a second subset of one or more TBs via one or more available slots of the first set of resources. In some aspects, the WCD may expect to transmit the first subset of one or more TBs via a third set of one or more resources. However, the WCD may perform one or more evaluations of the availability of the third set of one or more resources prior to transmission of the first subset of one or more TBs via the third set. If the third set of resources becomes unavailable, the WCD may reselect resources again.

[0094] Based at least in part on allowing the WCD to use the remaining resources of the first set of resources to transmit one or more TBs or a subset of one or more TBs after detecting unavailability of one or more resources of the first set of resources, the WCD may use the available resources rather than wasting the available resources and reselecting a new full set of resources, which may improve spectral efficiency and improve latency in the associated network by conserving network resources that might otherwise have been wasted or selected to be in the new full set of resources.

[0095] 8 is a diagram of an embodiment 800 associated with the selection and reselection of resources for transmission in accordance with the present disclosure. As shown in FIG. 8, a WCD (e.g., UE 120) may attempt to transmit using resources in an unlicensed spectrum or other sidelink channel, where the WCD attempts to reserve resources from an available pool of resources. In some aspects, the WCD may have already selected a first set of resources for transmission of one or more TBs.

[0096] 8 , the WCD may perform a first reassessment check 802 and a second reassessment check 804 associated with a first set of resources. For example, the WCD may check new reservations collected between the time of selection and T(3,1) 806 to perform the first reassessment check 802. Similarly, the WCD may check new reservations collected between the time of selection and T(3,2) 808 to perform the second reassessment check 804. The first reassessment check 802 and T(3,1) 806 may be associated with resources from the first set of resources in slot n 810. The second reassessment check 804 and T(3,2) 808 may be associated with resources from the first set of resources in slot n+1 812.

[0097] The WCD may perform an LBT check 814 before slot n 810. The LBT check 814 may have a duration during which the subchannel must be clear for the WCD to transmit during the selected resource. Slot n 810 may be associated with a first LBT completion deadline 816, and slot n+1 812 may be associated with a second LBT completion deadline 818. If the LBT check 814 is not completed before the first LBT completion deadline 816, the resources in slot n 810 are not available for transmitting one or more TBs. If the LBT check 814 is not completed before the second LBT completion deadline 818, the resources in slot n+1 812 are not available for transmitting one or more TBs.

[0098] In the following example, the amount of selected resources (eg, slots) is 2, and the amount of resources required to transmit one or more TBs is 1 (eg, 1 slot).

[0099] In a first embodiment of performing an evaluation check, the first re-evaluation check 802 may fail, the second re-evaluation check 804 may pass, and slot n 810 may pass the LBT check 814. In such an embodiment, the WCD may not transmit during slot n 810. However, the WCD may transmit during slot n+1 812 based at least in part on passing the second re-evaluation check 804 and passing the LBT check 814 (e.g., passing the first LBT completion deadline 816 may imply passing the second LBT completion deadline 818). In some aspects, the WCD may transmit one or more TBs without reselection.

[0100] In a second example of performing reputation checks, the first re-reputation check 802 may fail and the second re-reputation check 804 may fail. In such an example, the WCD may not transmit during slot n 810 or during slot n+1 812. Thus, the WCD may trigger a reselection.

[0101] In a third example of performing an evaluation check, the first re-evaluation check 802 may pass, the second re-evaluation check 804 may fail, and slot n 810 may fail the LBT check 814. In such an example, the WCD may not transmit during slot n 810 or during slot n+1 812 based at least in part on both slots failing to evaluate availability. Thus, the WCD may trigger a reselection.

[0102] In a fourth example of performing an evaluation check, the first re-evaluation check 802 may pass, the second re-evaluation check 804 may pass, slot n 810 may fail the LBT check 814, and slot n+1 812 may pass the LBT check 814. In such an example, the WCD may not transmit during slot n 810. However, the WCD may transmit during slot n+1 812 based at least in part on passing the second re-evaluation check 804 and passing the LBT check 814. In some aspects, the WCD may transmit one or more TBs without reselection.

[0103] In a fifth example of performing an evaluation check, the first re-evaluation check 802 may pass, the second re-evaluation check 804 may pass, slot n 810 may fail the LBT check 814, and slot n+1 812 may fail the LBT check 814. In such an example, the WCD may not transmit during slot n 810 or during slot n+1 812 based at least in part on both slots failing to evaluate availability. Thus, the WCD may trigger a reselection.

[0104] 9 illustrates an example process 900 performed, for example, by a WCD, in accordance with the present disclosure. Example process 900 is one example in which a WCD (e.g., UE 120) performs operations associated with selecting and reselecting resources for transmission.

[0105] 9, in some aspects, process 900 may include performing one or more evaluations of the availability of the first set of resources after selecting the first set of resources for transmission of one or more TBs (block 910). For example, the WCD may perform one or more evaluations of the availability of the first set of resources after selecting the first set of resources for transmission of one or more TBs as described above (e.g., using communications manager 1006 shown in FIG. 10).

[0106] As further shown in FIG. 9, in some aspects, process 900 includes, in connection with unavailability of one or more resources of the first set of resources, performing one of the following: transmitting one or more TBs via one or more available slots of the first set of resources; reselecting a second set of resources for transmitting the one or more TBs and transmitting the one or more TBs via the second set of resources; or reselecting a third set of resources for transmitting a first subset of one or more TBs and transmitting the second subset of one or more TBs on a subset of the first set of resources (block 920). For example, the WCD may perform one of the following in connection with the unavailability of one or more resources of the first set of resources (e.g., using the communications manager 1006 shown in FIG. 10 ), as described above: transmitting one or more TBs via one or more available slots of the first set of resources; reselecting a second set of resources for transmitting one or more TBs and transmitting the one or more TBs via the second set of resources; or reselecting a third set of resources for transmitting a first subset of one or more TBs and transmitting the second subset of one or more TBs on a subset of the first set of resources.

[0107] Process 900 may include additional aspects, such as any single aspect or any combination of aspects described below or with respect to one or more other processes described elsewhere herein.

[0108] In a first aspect, the process 900 includes selecting a first set of resources, where the first set of resources includes more resources than are needed to transmit one or more TBs.

[0109] In a second aspect, alone or in combination with the first aspect, performing one or more assessments of the availability of one or more resources includes one or more of performing a re-evaluation check associated with the one or more resources or performing an LBT check associated with the one or more resources.

[0110] In a third aspect, alone or in combination with one or more of the first and second aspects, performing a reevaluation check associated with the one or more resources includes one or more of performing a first reevaluation check associated with a first resource of the one or more resources or performing a second reevaluation check associated with a second resource of the one or more resources, and detecting unavailability of the one or more resources includes detecting availability of the first resource based on the first reevaluation check and detecting availability of the second resource based on the second reevaluation check.

[0111] In a fourth aspect, alone or in combination with one or more of the first to third aspects, performing a reassessment check associated with one or more resources includes one or more of: performing a reassessment check at periodic intervals; or performing a reassessment check based at least in part on channel conditions.

[0112] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, performing an LBT check associated with one or more resources includes performing a first LBT check associated with a first resource of the one or more resources and performing a second LBT check associated with a second resource of the one or more resources, and detecting unavailability of the one or more resources includes detecting availability of the first resource based on the first LBT check and detecting availability of the second resource based on the second LBT check.

[0113] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, performing an LBT check associated with one or more resources includes detecting an LBT check failure and unavailability of the one or more resources at the start of a first resource in time of the one or more unavailable resources, before the start of the first resource in time based on the inability of a successful LBT check to be completed before the start of the first resource in time, after a failed CCA attempt, or at periodic times after determining that the successful LBT check to be completed before the start of the first resource in time.

[0114] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the transmission of one or more TBs over one or more available slots of the first set of resources is based on one or more of: the one or more available slots being sufficient to transmit the one or more TBs; a ratio of an amount of available resources of the first set of resources to an amount of resources required for the transmission of the one or more TBs satisfying a threshold ratio; or a contiguous amount of available resources of the first set of resources satisfying a threshold amount of contiguous resources.

[0115] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the reselection of the second set of resources or the reselection of the third set of resources is based on one or more of: the amount of available resources in the first set of resources is insufficient for the transmission of one or more TBs; the ratio of the amount of available resources in the first set of resources to the amount of resources required for the transmission of one or more TBs fails to meet a threshold ratio; or the amount of consecutive resources available in the first set of resources fails to meet a threshold amount of consecutive resources.

[0116] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, reselecting the second set of resources includes canceling available resources of the first set of resources.

[0117] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, the amount of resources in the second set of resources or the third set of resources is based on the amount of one or more resources in the first set of resources that are unavailable or the amount of additional resources that are required to transmit one or more TBs based on the unavailability of the one or more resources that are unavailable.

[0118] 9 illustrates example blocks of process 900, in some aspects process 900 may include additional, fewer, different, or differently arranged blocks compared to those shown in FIG 9. Additionally or alternatively, two or more of the blocks of process 900 may be performed in parallel.

[0119] 10 is a diagram of an example apparatus 1000 for wireless communication in accordance with the present disclosure. Apparatus 1000 may be a WCD, or a WCD may include apparatus 1000. In some aspects, apparatus 1000 includes a receiving component 1002, a transmitting component 1004, or a communications manager 1006, which may communicate with each other (e.g., via one or more buses or one or more other components). In some aspects, communications manager 1006 is communications manager 140 described with respect to FIG. 1. As shown, apparatus 1000 may communicate with another apparatus 1008, such as a UE or a network node (e.g., a CU, DU, RU, or base station), using receiving component 1002 and transmitting component 1004.

[0120] In some aspects, device 1000 may be configured to perform one or more operations described herein with respect to FIGS. 7-8. Additionally or alternatively, device 1000 may be configured to perform one or more processes described herein, such as process 900 of FIG. 9. In some aspects, device 1000 or one or more components shown in FIG. 10 may include one or more components of the WCD described with respect to FIG. 2. Additionally or alternatively, one or more components shown in FIG. 10 may be implemented within one or more components described with respect to FIG. 2. Additionally or alternatively, one or more components of the set of components may be realized at least in part as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0121] Receiving component 1002 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from device 1008. Receiving component 1002 may provide the received communications to one or more other components of device 1000. In some aspects, receiving component 1002 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, among other examples) on the received communications and may provide the processed signals to one or more other components of device 1000. In some aspects, receiving component 1002 may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller / processor, a memory, or a combination thereof of the WCD described with respect to FIG.

[0122] The transmitting component 1004 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the device 1008. In some aspects, one or more other components of the device 1000 may generate communications and provide the generated communications to the transmitting component 1004 for transmission to the device 1008. In some aspects, the transmitting component 1004 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) on the generated communications and may transmit the processed signals to the device 1008. In some aspects, the transmitting component 1004 may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller / processor, a memory, or a combination thereof, of the WCD described with respect to FIG. 2 . In some aspects, the transmitting component 1004 may be collocated with the receiving component 1002 in a transceiver.

[0123] The communications manager 1006 may support the operation of the receiving component 1002 or the transmitting component 1004. For example, the communications manager 1006 may receive information associated with configuring the reception of a communication by the receiving component 1002 or the transmission of a communication by the transmitting component 1004. Additionally or alternatively, the communications manager 1006 may generate or provide control information to the receiving component 1002 or the transmitting component 1004 to control the reception or transmission of a communication.

[0124] After selecting a first set of resources for transmission of one or more TBs, the communications manager 1006 may perform one or more evaluations of availability of the first set of resources. In relation to unavailability of one or more resources of the first set of resources, the communications manager 1006 may selectively perform one of the following: transmitting one or more TBs via one or more available slots of the first set of resources; reselecting a second set of resources for transmission of one or more TBs and transmitting the one or more TBs via the second set of resources; or reselecting a third set of resources for transmission of a first subset of one or more TBs and transmitting the second subset of one or more TBs on a subset of the first set of resources.

[0125] The communications manager 1006 may select a first set of resources, the first set of resources including more resources than are needed to transmit one or more TBs.

[0126] The amount and arrangement of components shown in Figure 10 is provided as an example. In practice, there may be additional, fewer, different, or differently arranged components compared to those shown in Figure 10. Furthermore, two or more components shown in Figure 10 may be implemented within a single component, or a single component shown in Figure 10 may be implemented as multiple distributed components. Additionally or alternatively, a set of components shown in Figure 10 may perform one or more functions described as being performed by another set of components shown in Figure 10.

[0127] The following provides a summary of several aspects of the disclosure.

[0128] Aspect 1: A method of wireless communication performed by a wireless communication device (WCD), comprising: after selecting a first set of resources for transmission of one or more transport blocks (TBs), performing one or more evaluations of availability of the first set of resources; and, in relation to unavailability of one or more resources of the first set of resources, performing one of the following: transmitting the one or more TBs via one or more available slots of the first set of resources; reselecting a second set of resources for transmission of the one or more TBs and transmitting the one or more TBs via the second set of resources; or reselecting a third set of resources for transmission of a first subset of one or more TBs and transmitting the second subset of one or more TBs on a subset of the first set of resources.

[0129] Aspect 2: The method of aspect 1, further comprising selecting a first set of resources, the first set of resources including more resources than are needed to transmit one or more TBs.

[0130] Aspect 3: The method of any one of aspects 1 or 2, wherein performing one or more evaluations of the availability of one or more resources includes one or more of: performing a re-evaluation check associated with the one or more resources; or performing a listen-before-talk (LBT) check associated with the one or more resources.

[0131] Aspect 4: The method of aspect 3, wherein performing a reevaluation check associated with one or more resources includes one or more of: performing a first reevaluation check associated with a first resource of the one or more resources; or performing a second reevaluation check associated with a second resource of the one or more resources; and detecting unavailability of the one or more resources includes detecting availability of the first resource in association with the first reevaluation check, and detecting availability of the second resource in association with the second reevaluation check.

[0132] Aspect 5: The method of aspect 3, wherein performing a reassessment check associated with one or more resources includes one or more of: performing a reassessment check at periodic intervals; or performing a reassessment check based at least in part on channel conditions.

[0133] Aspect 6: The method of aspect 3, wherein performing an LBT check associated with one or more resources includes performing a first LBT check associated with a first resource among the one or more resources and performing a second LBT check associated with a second resource among the one or more resources, and detecting unavailability of the one or more resources includes detecting availability of the first resource in association with the first LBT check and detecting availability of the second resource in association with the second LBT check.

[0134] Aspect 7: The method of aspect 3, wherein performing an LBT check associated with one or more resources includes detecting a failure of the listen-before-talk (LBT) check and unavailability of the one or more resources at the start of a first resource in time among the one or more resources that is unavailable, before the start of the first resource in time in connection with a successful LBT check not being able to be completed before the start of the first resource in time, after a failed clear channel assessment (CCA) attempt, or at periodic times after determining that a successful LBT check not being able to be completed before the start of the first resource in time.

[0135] Aspect 8: The method of any one of aspects 1 to 7, wherein transmission of one or more TBs via one or more available slots of the first set of resources is associated with one or more of the following: the one or more available slots are sufficient to transmit one or more TBs; a ratio of an amount of available resources of the first set of resources to an amount of resources required for transmission of the one or more TBs satisfies a threshold ratio; or a consecutive amount of available resources of the first set of resources satisfies a threshold amount of consecutive resources.

[0136] Aspect 9: The method of any one of aspects 1 to 8, wherein the reselection of the second set of resources or the reselection of the third set of resources is associated with one or more of the following: an amount of available resources from the first set of resources is insufficient for transmission of one or more TBs; a ratio of an amount of available resources from the first set of resources to an amount of resources required for transmission of one or more TBs fails to satisfy a threshold ratio; or a consecutive amount of available resources from the first set of resources fails to satisfy a threshold amount of consecutive resources.

[0137] Embodiment 10: The method of any one of embodiments 1 to 9, wherein reselecting the second set of resources includes canceling available resources from the first set of resources.

[0138] Aspect 11: The method of any one of aspects 1 to 10, wherein the amount of resources in the second set of resources or the third set of resources is associated with the amount of one or more resources in the first set of resources that are unavailable or the amount of additional resources that are required to transmit one or more TBs associated with the unavailability of one or more resources that are unavailable.

[0139] Aspect 12: An apparatus for wireless communication in a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor, the instructions causing the apparatus to perform a method described in one or more of aspects 1 to 11.

[0140] Aspect 13: A device for wireless communication, comprising: a memory; and one or more processors coupled to the memory, wherein the one or more processors are configured to perform the methods described in one or more of aspects 1-11.

[0141] Aspect 14: An apparatus for wireless communication, comprising: at least one means for performing the method according to one or more of aspects 1-11.

[0142] Aspect 15: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor, the instructions performing a method described in one or more of aspects 1-11.

[0143] Aspect 16: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the non-transitory computer-readable medium including one or more instructions that, when executed by one or more processors of a device, cause the device to perform the methods described in one or more of Aspects 1-11.

[0144] The above disclosure provides illustration and description, but is not intended to be exhaustive or to limit the embodiments to the precise form disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the embodiments.

[0145] As used herein, the term “component” shall be broadly construed as hardware or a combination of hardware and software. “Software” shall be broadly construed to mean, among other examples, instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, or functions, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a “processor” is implemented in hardware or a combination of hardware and software. It will be apparent that the systems or methods described herein may be implemented in different forms of hardware or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems or methods is not a limiting aspect. Accordingly, the operation and behavior of the systems or methods will be described herein without reference to specific software code, as those skilled in the art will understand that software and hardware may be designed to implement the systems or methods based at least in part on the description herein.

[0146] As used herein, "meeting a threshold" can refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, or not equal to the threshold, among other examples, depending on the context.

[0147] Although particular combinations of features are recited in a claim or disclosed herein, those combinations do not limit the disclosure of various aspects. Many of these features may be combined in ways not specifically recited in the claims or disclosed herein. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set. As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those items, including single members. As an example, "at least one of a, b, or c" is intended to include a, b, c, a+b, a+c, b+c, and a+b+c, as well as any combination with multiple identical elements (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c, and c+c+c, or any other ordering of a, b, and c).

[0148] No element, act, or instruction used herein should be construed as essential or required unless expressly described as such. Also, as used herein, the articles "a" and "an" are intended to include one or more items and may be used interchangeably with "one or more." Furthermore, as used herein, the article "the" is intended to include one or more items referred to in connection with the article "the" and may be used interchangeably with "one or more." Furthermore, as used herein, the terms "set" and "group" are intended to include one or more items and may be used interchangeably with "one or more." Where only one item is intended, the phrase "only one" or similar language is used. Also, as used herein, terms such as "has," "have," or "having" and similar terms are intended to be open-ended terms that do not limit the elements they modify (e.g., an element that "has" A may also have B). Furthermore, the phrase "based on" is intended to mean "based at least in part on," unless expressly stated otherwise. Also, as used herein, the term "or" is inclusive when used consecutively and can be used interchangeably with "and / or" unless expressly stated otherwise (e.g., when used in combination with "either" or "only one of").

Claims

1. 1. A wireless communication device (WCD) for wireless communication, comprising: a processing system including one or more processors and one or more memories coupled to the one or more processors, the processing system providing the WCD with: performing one or more evaluations of availability of the first set of resources after selection of the first set of resources for transmission of one or more transport blocks (TBs); in relation to unavailability of one or more resources of the first set of resources, transmitting the one or more TBs over one or more available slots of the first set of resources; reselecting a second set of resources for transmission of the one or more TBs and transmitting the one or more TBs over the second set of resources; or reselecting a third set of resources for transmission of the first subset of the one or more TBs and transmitting the second subset of the one or more TBs on a subset of the first set of resources; Execute one of the following: It is configured as follows: WCD.

2. the processing system is further configured to cause the WCD to select the first set of resources; the first set of resources includes more resources than are needed for transmission of the one or more TBs. The WCD of claim 1 .

3. In order for the processing system to cause the WCD to perform the one or more assessments of the availability of the one or more resources, the processing system causes the WCD to: causing a reassessment check associated with said one or more resources to be performed; or performing a listen-before-talk (LBT) check associated with the one or more resources; It is configured as follows: The WCD of claim 1 .

4. To cause the WCD to perform the re-evaluation check associated with the one or more resources, the processing system causing a first re-evaluation check associated with a first resource of the one or more resources; or performing a second re-evaluation check associated with a second resource of the one or more resources; It is structured as follows: The processing system may include: detecting availability of the first resource in connection with the first re-evaluation check; detecting availability of the second resource in connection with the second re-evaluation check; and further configured as follows: The WCD of claim 3 .

5. To cause the WCD to perform the re-evaluation check associated with the one or more resources, the processing system causing said re-evaluation checks to be performed at periodic intervals; or performing the re-evaluation check based at least in part on channel conditions; It is configured as follows: The WCD of claim 3 .

6. In order for the processing system to cause the WCD to perform the LBT check associated with the one or more resources, the processing system may: performing a first LBT check associated with a first resource of the one or more resources; performing a second LBT check associated with a second resource of the one or more resources; It is structured as follows: The processing system causes the WCD to detect unavailability of the one or more resources by: detecting availability of the first resource in connection with the first LBT check; detecting availability of the second resource in connection with the second LBT check; It is configured as follows: The WCD of claim 3 .

7. In order for the processing system to cause the WCD to perform the LBT check associated with the one or more resources, the processing system may: At the start of a resource that is temporally first of the one or more resources that is unavailable, before the start of the first resource in time, in relation to which a successful listen-before-talk (LBT) check cannot be completed before the start of the first resource in time; After a failed Clear Channel Assessment (CCA) attempt, or At periodic times after determining that the normal LBT check cannot be completed before the start of the first resource in time, configured to detect a failure of the LBT check and the unavailability of the one or more resources. The WCD of claim 3 .

8. transmitting the one or more TBs over the one or more available slots of the first set of resources; the one or more available slots are sufficient to transmit the one or more TBs; a ratio of an amount of available resources in the first set of resources to an amount of resources needed for transmission of the one or more TBs satisfies a threshold ratio; or a contiguous resource amount of the available resources in the first set of resources satisfies a threshold amount of contiguous resources; associated with one or more of The WCD of claim 1 .

9. reselecting the second set of resources or the third set of resources, an amount of available resources in the first set of resources is insufficient for transmission of the one or more TBs; the ratio of the amount of available resources in the first set of resources to the amount of resources needed for transmission of the one or more TBs fails to meet a threshold ratio; or the contiguous resource amount of the available resources in the first set of resources fails to meet a threshold amount of contiguous resources; associated with one or more of The WCD of claim 1 .

10. 2. The WCD of claim 1, wherein the processing system is configured to cause the WCD to cancel available resources in the first set of resources in order to cause the WCD to reselect the second set of resources.

11. the amount of resources of the second set of resources or the third set of resources; an amount of the one or more resources of the first set of resources that is unavailable; or an amount of additional resources required to transmit the one or more TBs associated with the unavailability of the one or more resources that are unavailable; Associated with The WCD of claim 1 .

12. 1. A method of wireless communication by a wireless communication device (WCD), comprising: performing one or more assessments of availability of the first set of resources after selection of the first set of resources for transmission of one or more transport blocks (TBs); in relation to unavailability of one or more resources of the first set of resources, transmitting the one or more TBs over one or more available slots of the first set of resources; reselecting a second set of resources for transmission of the one or more TBs and transmitting the one or more TBs over the second set of resources; or reselecting a third set of resources for transmission of the first subset of the one or more TBs and transmitting the second subset of the one or more TBs on a subset of the first set of resources; and A method comprising:

13. selecting the first set of resources; the first set of resources includes more resources than are needed to transmit the one or more TBs. The method of claim 12.

14. performing the one or more assessments of availability of the one or more resources; performing a reassessment check associated with said one or more resources; or performing a listen-before-talk (LBT) check associated with the one or more resources; [0033] The method of claim 12.

15. performing the re-evaluation check associated with the one or more resources; performing a first re-evaluation check associated with a first resource of the one or more resources; or performing a second re-evaluation check associated with a second resource of the one or more resources; [0033] detecting unavailability of the one or more resources includes detecting availability of the first resource in connection with the first re-evaluation check, and detecting availability of the second resource in connection with the second re-evaluation check.

15. The method of claim 14.

16. performing the re-evaluation check associated with the one or more resources; performing said reassessment checks at periodic intervals; or performing the re-evaluation check based at least in part on channel conditions; [0033] 15. The method of claim 14.

17. performing the LBT check associated with the one or more resources; performing a first LBT check associated with a first resource of the one or more resources; performing a second LBT check associated with a second resource of the one or more resources; and Including, detecting unavailability of the one or more resources includes detecting availability of the first resource in association with the first LBT check, and detecting availability of the second resource in association with the second LBT check.

15. The method of claim 14.

18. performing the LBT check associated with the one or more resources; At the start of a resource that is temporally first of the one or more resources that is unavailable, before the start of the first resource in time, in relation to which a successful listen-before-talk (LBT) check cannot be completed before the start of the first resource in time; After a failed Clear Channel Assessment (CCA) attempt, or At periodic times after determining that the normal LBT check cannot be completed before the start of the first resource in time, detecting a failure of the LBT check and the unavailability of the one or more resources.

15. The method of claim 14.

19. transmitting the one or more TBs over the one or more available slots of the first set of resources; the one or more available slots are sufficient to transmit the one or more TBs; a ratio of an amount of available resources in the first set of resources to an amount of resources needed for transmission of the one or more TBs satisfies a threshold ratio; or a contiguous resource amount of the available resources in the first set of resources satisfies a threshold amount of contiguous resources; associated with one or more of The method of claim 12.

20. reselecting the second set of resources or the third set of resources, an amount of available resources in the first set of resources is insufficient for transmission of the one or more TBs; the ratio of the amount of available resources in the first set of resources to the amount of resources needed for transmission of the one or more TBs fails to meet a threshold ratio; or the contiguous resource amount of the available resources in the first set of resources fails to meet a threshold amount of contiguous resources; associated with one or more of The method of claim 12.

21. The method of claim 12 , wherein reselecting the second set of resources includes canceling available resources from the first set of resources.

22. the amount of resources of the second set of resources or the third set of resources; an amount of the one or more resources of the first set of resources that is unavailable; or an amount of additional resources required to transmit the one or more TBs associated with the unavailability of the one or more resources that are unavailable; Associated with The method of claim 12.

23. 1. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising: The method includes one or more instructions that, when executed by one or more processors of a wireless communication device (WCD), cause the WCD to: performing one or more evaluations of availability of the first set of resources after selection of the first set of resources for transmission of one or more transport blocks (TBs); in relation to unavailability of one or more resources of the first set of resources, transmitting the one or more TBs over one or more available slots of the first set of resources; reselecting a second set of resources for transmission of the one or more TBs and transmitting the one or more TBs over the second set of resources; or reselecting a third set of resources for transmission of the first subset of the one or more TBs and transmitting the second subset of the one or more TBs on a subset of the first set of resources; Execute one of the following: Non-transitory computer-readable medium.

24. The one or more instructions further cause the WCD to select the first set of resources; the first set of resources includes more resources than are needed to transmit the one or more TBs.

24. The non-transitory computer-readable medium of claim 23.

25. The one or more instructions that cause the WCD to perform the one or more evaluations of the availability of the one or more resources may include causing the WCD to: causing a reassessment check associated with said one or more resources to be performed; or performing a listen-before-talk (LBT) check associated with the one or more resources; 24. The non-transitory computer-readable medium of claim 23.

26. The one or more instructions that cause the WCD to perform the re-evaluation check associated with the one or more resources may include causing the WCD to: causing a first re-evaluation check associated with a first resource of the one or more resources; or performing a second re-evaluation check associated with a second resource of the one or more resources; detecting unavailability of the one or more resources includes detecting availability of the first resource in connection with the first re-evaluation check, and detecting availability of the second resource in connection with the second re-evaluation check.

26. The non-transitory computer-readable medium of claim 25.

27. 1. An apparatus for wireless communication, comprising: means for performing, after selection of a first set of resources for transmission of one or more transport blocks (TBs), one or more assessments of availability of said first set of resources; in relation to unavailability of one or more resources of the first set of resources, transmitting the one or more TBs over one or more available slots of the first set of resources; reselecting a second set of resources for transmission of the one or more TBs and transmitting the one or more TBs over the second set of resources; or reselecting a third set of resources for transmission of the first subset of the one or more TBs and transmitting the second subset of the one or more TBs on a subset of the first set of resources; and means for performing one of the following: An apparatus comprising:

28. means for selecting the first set of resources; the first set of resources includes more resources than are needed to transmit the one or more TBs.

28. The apparatus of claim 27.

29. the means for performing the one or more assessments of the availability of the one or more resources means for performing a reassessment check associated with said one or more resources; or means for performing a listen-before-talk (LBT) check associated with said one or more resources; [0033] 28. The apparatus of claim 27.

30. the means for performing the re-evaluation check associated with the one or more resources, means for performing a first re-evaluation check associated with a first resource of the one or more resources; or means for performing a second re-evaluation check associated with a second resource of the one or more resources; [0033] The device, means for detecting availability of the first resource in connection with the first re-evaluation check; means for detecting availability of the second resource in connection with the second re-evaluation check; Further comprising:

30. The apparatus of claim 29.

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