Sidelink transmission mode to wireless wide area network (WWAN)

Abstract

Aspects of the present disclosure relate to mechanisms for user devices for indicating resources with limited wireless wide area network (WWAN) transmission capabilities. In some examples, the user device indicates a sidelink transmission mode to the WWAN, receives one or more uplink transmission grants for the WWAN based at least on the sidelink transmission mode, and performs at least one of the following transmissions: sending first data to a second user device on a sidelink channel based on the sidelink transmission mode, or sending second data to the WWAN based on one or more uplink transmission grants. In some examples, the user device sends a sidelink transmission configuration to the WWAN, the sidelink transmission configuration including one or more sidelink transmission modes. In some examples, the user device selects a sidelink transmission mode from one or more sidelink transmission modes based on an expected sidelink transmission.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Non-Provisional Patent Application No. 16 / 452,293 filed in the U.S. Patent and Trademark Office on June 25, 2019, and Provisional Patent Application No. 62 / 690,870 filed in the U.S. Patent and Trademark Office on June 27, 2018, the entire contents of which are incorporated herein by reference as if fully set forth in their entirety below and for all applicable purposes. Technical Field

[0003] The techniques discussed below relate generally to wireless communication systems, and more particularly, to indicating resources for sidelink traffic to a wireless wide area network (WWAN). Background Art

[0004] Wireless wide area network (WWAN) signal processing (e.g., long term evolution (LTE) signal processing and / or 5G signal processing) and sidelink signal processing (e.g., cellular vehicle-to-everything (C-V2X) signal processing) may be integrated in a hardware modem of a device, such as a wireless communication device (e.g., a smart phone, a laptop, etc.). A modem having both WWAN capabilities and C-V2X capabilities may need to share the same limited resources, such as time-frequency resources, transmission power, and / or computing bandwidth. For example, WWAN transmissions and C-V2X transmissions may compete for resources in a given subframe. Such competition may result in degradation of one or both of the C-V2X network and the WWAN network.

[0005] As the demand for C-V2X communications increases, research and development continues to advance C-V2X technology to not only meet the growing demand for C-V2X, but also improve and enhance the user experience. Summary of the invention

[0006] A simplified overview of one or more aspects of the present disclosure is presented below to provide a basic understanding of these aspects. This overview is not an extensive review of all expected features of the present disclosure, and is neither intended to identify the key or important elements of all aspects of the present disclosure, nor is it intended to describe the scope of any or all aspects of the present disclosure. Its sole purpose is to present some concepts of one or more aspects of the present disclosure in a simplified form as a preface to a more detailed description presented later.

[0007] In one example, a method for a user device is disclosed. The method includes: indicating a sidelink transmission mode to a wireless wide area network (WWAN); receiving one or more uplink transmission grants for the WWAN based at least on the sidelink transmission mode; and performing at least one of the following transmissions: transmitting first data to a second user device on a sidelink channel based on the sidelink transmission mode, or transmitting second data to the WWAN based on the one or more uplink transmission grants.

[0008] In one example, an apparatus for wireless communication is disclosed. The apparatus includes a processor, a transceiver communicatively coupled to the processor, and a memory communicatively coupled to the processor. The processor is configured to indicate a sidelink transmission mode to a WWAN, receive one or more uplink transmission grants for the WWAN based at least on the sidelink transmission mode, and perform at least one of the following transmissions: sending first data to a user device on a sidelink channel based on the sidelink transmission mode, or sending second data to the WWAN based on one or more uplink transmission grants.

[0009] In one example, a method for a base station is disclosed. The method includes: receiving an indication of a sidelink transmission mode from a user equipment; and allocating one or more uplink transmission grants for a WWAN to the user equipment based at least on the sidelink transmission mode.

[0010] In one example, an apparatus for wireless communication is disclosed. The apparatus includes a processor, a transceiver communicatively coupled to the processor, and a memory communicatively coupled to the processor. The processor is configured to receive an indication of a sidelink transmission mode from a user device, and to allocate one or more uplink transmission grants for a wireless wide area network (WWAN) to the user device based at least on the sidelink transmission mode.

[0011] By reading the following detailed description, these and other aspects of the present invention will be more fully understood. After reading the description of the following specific exemplary embodiments of the present invention in conjunction with the accompanying drawings, other aspects, features and embodiments of the present invention will become apparent to those skilled in the art. Although features of the present invention may be discussed relative to certain embodiments and accompanying drawings below, all embodiments of the present invention may include one or more advantageous features discussed herein. In other words, although one or more embodiments may be discussed as having certain advantageous features, one or more such features may also be used according to the various embodiments of the present invention discussed herein. In a similar manner, although exemplary embodiments may be discussed below as device, system or method embodiments, it should be understood that such exemplary embodiments may be implemented in various devices, systems and methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of a wireless communication system.

[0013] Figure 2 is a conceptual illustration of an example of a radio access network.

[0014] Figure 3 is a schematic illustration of the organization of radio resources in an air interface utilizing Orthogonal Frequency Division Multiplexing (OFDM).

[0015] Figure 4 is a block diagram conceptually illustrating an example of a hardware implementation for a scheduling entity according to some aspects of the present disclosure.

[0016] Figure 5 is a block diagram conceptually illustrating an example of a hardware implementation for a scheduled entity according to some aspects of the present disclosure.

[0017] Figure 6 An exemplary network according to some aspects of the present disclosure is shown.

[0018] Figure 7 Exemplary transmission modes and their corresponding index values ​​according to some aspects of the present disclosure are shown.

[0019] Figure 8 Example subframes according to some aspects of the present disclosure are shown.

[0020] Fig. 9 An exemplary signal flow diagram according to some aspects of the present disclosure is shown.

[0021] Fig.10 is a flow chart illustrating an exemplary process according to some aspects of the present disclosure.

[0022] Fig.11 is a flow chart illustrating an exemplary process according to some aspects of the present disclosure. DETAILED DESCRIPTION

[0023] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of the various concepts. However, it is apparent to those skilled in the art that these concepts may be practiced without these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0024] Although various aspects and embodiments are described in this application by illustrating some examples, it will be understood by those skilled in the art that additional implementations and use cases can be generated in many different arrangements and scenarios. The innovations described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, implementations and / or uses can be generated by integrated chip implementations and other devices based on non-module components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchase equipment, medical equipment, AI-enabled devices, etc.). Although some examples may or may not be specifically for use cases or applications, various applicability of the above innovations may occur. The range of implementations can range from chip-level or modular components to non-modular, non-chip-level implementations, and further to distributed or OEM devices or systems that combine one or more aspects of the innovation. In some practical environments, the device that combines the described aspects and features may also have to include additional components and features for implementing and practicing the claimed and described embodiments. For example, the transmission and reception of wireless signals must include a large number of components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, one or more processors, interleavers, adders / adding circuits, etc.). It is intended that the innovations described herein can be practiced in a variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc., of various sizes, shapes, and configurations.

[0025] The various concepts presented throughout this disclosure may be implemented in a wide variety of telecommunication systems, network architectures and communication standards. Figure 1 , various aspects of the present disclosure are described with reference to a wireless communication system 100 as an illustrative example without limitation. The wireless communication system 100 includes three interacting domains: a core network 102, a radio access network (RAN) 104, and user equipment (UE) 106 and 107. With the wireless communication system 100, the UE 106 can be enabled to communicate data with an external data network 110 (such as (but not limited to) the Internet). In some examples, the RAN 104 can correspond to a wireless wide area network (WWAN).

[0026] The RAN 104 may implement any suitable one or more wireless communication technologies to provide radio access to the UE 106. As an example, the RAN 104 may operate in accordance with the 3rd Generation Partnership Project (3GPP) New Radio (NR) specification, commonly referred to as 5G. As another example, the RAN 104 may operate under a mix of 5G NR and Evolved Universal Terrestrial Radio Access Network (eUTRAN) standards, commonly referred to as LTE. 3GPP refers to this hybrid RAN as the Next Generation RAN or NG-RAN. Of course, many other examples may be utilized within the scope of the present disclosure.

[0027] As shown, the RAN 104 includes a number of base stations 108. In a broad sense, a base station is a network element in a radio access network that is responsible for radio transmission and reception to or from a UE in one or more cells. A base station may be referred to differently by those skilled in the art as a base transceiver station (BTS), a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), an access point (AP), a Node B (NB), an eNode B (eNB), a gNode B (gNB), or some other suitable terminology in different technologies, standards, or contexts.

[0028] The radio access network 104 is further shown to support wireless communications for multiple mobile devices. In the 3GPP standard, a mobile device may be referred to as a user equipment (UE), but those skilled in the art may also refer to it as a mobile station (MS), a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal (AT), a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, or some other suitable terminology. A UE may be a device that provides a user with access to network services.

[0029] In this document, a "mobile" device does not necessarily have the ability to move and can be fixed. The term mobile device or mobile device refers broadly to various devices and technologies. A UE may include multiple hardware structural components that are sized, shaped, and arranged to facilitate communication; such components may include antennas, antenna arrays, RF chains, amplifiers, one or more processors, etc. that are electrically coupled to each other. For example, some non-limiting examples of mobile devices include mobile phones, cellular (cell) phones, smart phones, session initiation protocol (SIP) phones, laptops, personal computers (PCs), notebooks, netbooks, smart books, tablets, personal digital assistants (PDAs), and various embedded systems, for example, corresponding to the "Internet of Things" (IoT). In addition, a mobile device may be a car or other transportation vehicle, a remote sensor or actuator, a robot or robotic device, a satellite radio, a global positioning system (GPS) device, an object tracking device, a drone, a multi-rotor helicopter, a quadcopter, a remote control device, a consumer and / or wearable device (such as glasses), a wearable camera, a virtual reality device, a smart watch, a health or fitness tracker, a digital audio player (such as an MP3 player), a camera, a game console, etc. In addition, the mobile device can be a digital home or smart home device, such as home audio, video and / or multimedia equipment, appliances, vending machines, smart lighting equipment, home security systems, smart meters, etc. In addition, the mobile device can be a smart energy device, a security device, a solar panel or solar array, a municipal infrastructure device that controls power (e.g., smart grid), lighting, water, etc.; industrial automation and enterprise equipment; logistics controllers; agricultural equipment; military defense equipment, vehicles, aircraft, ships and weapons, etc. In addition, the mobile device can provide connected medical or telemedicine support, such as health care at a distance. Remote health devices may include remote health monitoring devices and remote health management devices, for example, their communications can be given priority processing or priority access over other types of information in terms of priority access to critical service data transmission and / or in terms of the associated QoS of critical service data transmission.

[0030] Wireless communication between the RAN 104 and the UE 106 may be described as utilizing an air interface. Transmissions over the air interface from a base station (e.g., base station 108) to one or more UEs (e.g., UE 106) may be referred to as downlink (DL) transmissions. According to certain aspects of the present disclosure, the term downlink may refer to point-to-multipoint transmissions originating from a scheduling entity (further described below; e.g., base station 108). Another way to describe the scheme may be to use the term "broadcast channel multiplexing". Transmissions from a UE (e.g., UE 106) to a base station (e.g., base station 108) may be referred to as uplink (UL) transmissions. According to other aspects of the present disclosure, the term "uplink" may refer to point-to-point transmissions originating from a scheduled entity (further described below; e.g., UE 106).

[0031] In some examples, access to the air interface may be scheduled, wherein a scheduling entity (e.g., a base station 108) allocates resources for communication between some or all devices and equipment within its service area or cell. In the present disclosure, as discussed further below, a scheduling entity may be responsible for scheduling, allocating, reconfiguring, and releasing resources for one or more scheduled entities. That is, for scheduled communications, a UE 106, which may be a scheduled entity, may utilize resources allocated by the scheduling entity 108.

[0032] Base station 108 is not the only entity that can serve as a scheduling entity. That is, in some examples, a UE can serve as a scheduling entity to schedule resources for one or more scheduled entities (eg, one or more other UEs).

[0033] like Figure 1 As shown in , the scheduling entity 108 can broadcast downlink traffic 112 to one or more scheduled entities 106. In a broad sense, the scheduling entity 108 is a node or device responsible for scheduling traffic in the wireless communication network, which traffic includes downlink traffic 112 and, in some examples, uplink traffic 116 from one or more scheduled entities 106 to the scheduling entity 108. On the other hand, the scheduled entity 106 is a node or device that receives downlink control information 114 from another entity in the wireless communication network (such as the scheduling entity 108), and the downlink control information 114 includes, but is not limited to, scheduling information (e.g., grants), synchronization or timing information, or other control information.

[0034] Typically, the base stations 108 may include a backhaul interface for communicating with a backhaul portion 120 of the wireless communication system. The backhaul 120 may provide a link between the base stations 108 and the core network 102. Additionally, in some examples, the backhaul network may provide interconnections between the respective base stations 108. Various types of backhaul interfaces may be employed, such as a direct physical connection using any suitable transport network, a virtual network, etc.

[0035] The core network 102 may be part of the wireless communication system 100 and may be independent of the radio access technology used in the RAN 104. In some examples, the core network 102 may be configured according to a 5G standard (e.g., 5GC). In other examples, the core network 102 may be configured according to a 4G Evolved Packet Core (EPC) or any other suitable standard or configuration.

[0036] Now refer to Figure 2 , by way of example and not limitation, a schematic diagram of a RAN 200 is provided. In some examples, the RAN 200 may be similar to that described above and in Figure 1 The geographic area covered by the RAN 200 may be divided into cells that may be uniquely identified by a user equipment (UE) based on an identity broadcast from an access point or base station. Figure 2 Macro cells 202, 204, and 206 and small cells 208 are shown, each of which may include one or more sectors (not shown). A sector is a sub-area of ​​a cell. All sectors within a cell are served by the same base station. A radio link within a sector can be identified by a single logical identifier belonging to the sector. In a cell divided into sectors, multiple sectors within a cell may be formed by antenna groups, where each antenna is responsible for communicating with UEs in a portion of the cell.

[0037] exist Figure 2 , two base stations 210 and 212 are shown in cells 202 and 204; and a third base station 214 is shown as controlling a remote radio head (RRH) 216 in cell 206. That is, the base station may have an integrated antenna, or may be connected to an antenna or RRH by a feeder cable. In the example shown, cells 202, 204, and 206 may be referred to as macro cells because base stations 210, 212, and 214 support cells with large sizes. In addition, a base station 218 is shown in a small cell 208 (e.g., a micro cell, a pico cell, a femto cell, a home base station, a home node B, a home eNode B, etc.), which may overlap with one or more macro cells. In this example, cell 208 may be referred to as a small cell because base station 218 supports a cell with a relatively small size. The cell size may be determined based on system design and component constraints.

[0038] It should be understood that the radio access network 200 may include any number of wireless base stations and cells. In addition, relay nodes may be deployed to extend the size or coverage area of ​​a given cell. Base stations 210, 212, 214, 218 provide wireless access points to the core network for any number of mobile devices. In some examples, base stations 210, 212, 214, and / or 218 may be similar to those described above and in Figure 1 The base station / scheduling entity 108 shown in FIG.

[0039] Figure 2 Also included is a quadcopter or drone 220 that can be configured to function as a base station. That is, in some examples, a cell may not necessarily be fixed, and the geographic area of ​​the cell may move based on the location of a mobile base station such as a quadcopter 220.

[0040] Within the RAN 200, a cell may include UEs that may communicate with one or more sectors of each cell. In addition, each base station 210, 212, 214, 218, and 220 may be configured to provide access to the core network 102 (see FIG. 1 ) for all UEs in the corresponding cell. Figure 1 ) access point. For example, UEs 222 and 224 may communicate with base station 210; UEs 226 and 228 may communicate with base station 212; UEs 230 and 232 may communicate with base station 214 via RRH 216; UE 234 may communicate with base station 218; and UE 236 may communicate with mobile base station 220. In some examples, UEs 222, 224, 226, 228, 230, 232, 234, 236, 238, 240, and / or 242 may communicate with the base stations described above and in Figure 1 The UE / scheduled entity 106 shown in FIG. 1 is the same as that shown in FIG.

[0041] In some examples, a mobile network node (e.g., quadcopter 220) can be configured to function as a UE. For example, quadcopter 220 can operate within cell 202 by communicating with base station 210.

[0042] On the other hand of RAN 200, sidelink signals can be used between UEs without having to rely on scheduling or control information from a base station. For example, two or more UEs (e.g., UE 226 and 228) can communicate with each other using peer-to-peer (P2P) or sidelink signals 227 without relaying the communication through a base station (e.g., base station 212). In another example, UE 238 is shown communicating with UEs 240 and 242. Here, UE 238 can be used as a scheduling entity or a primary sidelink device, and UEs 240 and 242 can be used as scheduled entities or non-primary (e.g., auxiliary) sidelink devices. In yet another example, a UE can be used as a scheduling entity in a device-to-device (D2D), peer-to-peer (P2P) or vehicle-to-vehicle (V2V) network (e.g., a C-V2X network) and / or in a mesh network. In the mesh network example, in addition to communicating with the scheduling entity 238, UEs 240 and 242 can also optionally communicate directly with each other. Therefore, in a wireless communication system having scheduled access to time-frequency resources and having a cellular configuration, a P2P configuration, or a mesh configuration, a scheduling entity and one or more scheduled entities may communicate using the scheduled resources.

[0043] In the radio access network 200, the ability of a UE to communicate independently of its location while moving is called mobility. Typically, in an access and mobility management function (AMF, not shown, Figure 1 Under the control of the core network 102 in the UE, various physical channels between the UE and the radio access network are established, maintained and released. The access and mobility management functions may include a security context management function (SCMF) that manages security contexts for control plane and user plane functions, and a security anchor function (SEAF) that performs authentication.

[0044] In various aspects of the present disclosure, the radio access network 200 can utilize DL-based mobility or UL-based mobility to implement mobility and handover (i.e., the transfer of a UE's connection from one radio channel to another). In a network configured for DL-based mobility, during a call with a scheduling entity or at any other time, the UE can monitor various parameters of the signal from its serving cell and various parameters of neighboring cells. Depending on the quality of these parameters, the UE can maintain communication with one or more neighboring cells. During this period of time, if the UE moves from one cell to another, or if the signal quality from a neighboring cell exceeds the signal quality from the serving cell for a given amount of time, the UE may perform a handover or handover from the serving cell to a neighboring (target) cell. For example, a UE 224 (shown as a vehicle, but any suitable form of UE may be used) can move from a geographic area corresponding to its serving cell 202 to a geographic area corresponding to a neighboring cell 206. When the signal strength or quality from the neighboring cell 206 exceeds the signal strength or quality of its serving cell 202 for a given amount of time, the UE 224 can send a report message indicating this condition to its serving base station 210. In response, UE 224 may receive a handover command, and the UE may perform a handover to cell 206 .

[0045] In a network configured for UL-based mobility, the UL reference signal from each UE can be used by the network to select a serving cell for each UE. In some examples, base stations 210, 212, and 214 / 216 can broadcast a unified synchronization signal (e.g., a unified primary synchronization signal (PSS), a unified secondary synchronization signal (SSS), and a unified physical broadcast channel (PBCH)). UEs 222, 224, 226, 228, 230, and 232 can receive the unified synchronization signal, derive carrier frequency and slot timing from the synchronization signal, and send an uplink pilot or reference signal in response to the derived timing. The uplink pilot signal sent by a UE (e.g., UE 224) can be received simultaneously by two or more cells (e.g., base stations 210 and 214 / 216) within the radio access network 200. Each cell may measure the strength of the pilot signal, and the radio access network (e.g., one or more of the base stations 210 and 214 / 216 and / or a central node within the core network) may determine a serving cell for the UE 224. As the UE 224 moves through the radio access network 200, the network may continue to monitor the uplink pilot signals sent by the UE 224. When the signal strength or quality of the pilot signal measured by the neighboring cell exceeds the signal strength or quality measured by the serving cell, the network 200 may handover the UE 224 from the serving cell to the neighboring cell with or without notifying the UE 224.

[0046] Although the synchronization signals transmitted by base stations 210, 212, and 214 / 216 may be uniform, the synchronization signals may not identify a specific cell, but may identify a zone of multiple cells operating at the same frequency and / or having the same timing. The use of zones in a 5G network or other next generation communication network enables an uplink-based mobility framework and improves the efficiency of both the UE and the network because the number of mobility messages that need to be exchanged between the UE and the network can be reduced.

[0047] In various implementations, the air interface in the radio access network 200 can utilize licensed spectrum, unlicensed spectrum, or shared spectrum. Licensed spectrum generally provides dedicated use of a portion of spectrum through a mobile network operator purchasing a license from a government regulator. Unlicensed spectrum provides shared use of a portion of spectrum without the need for a government-mandated license. While certain technical rules generally still need to be followed to access unlicensed spectrum, generally, any operator or device can gain access. Shared spectrum may fall between licensed spectrum and unlicensed spectrum, where technical rules or restrictions may be required to access the spectrum, but the spectrum may still be shared by multiple operators and / or multiple RATs. For example, the holder of a license for a portion of licensed spectrum may provide Licensed Shared Access (LSA) to share the spectrum with other parties, such as to obtain access on terms determined by the appropriate licensee. Reference will be made to Figure 3 Various aspects of the present disclosure are described with reference to the OFDM waveform schematically shown in FIG. It should be understood by those skilled in the art that various aspects of the present disclosure can be applied to DFT-s-OFDMA waveforms in substantially the same manner as described below. That is, although some examples of the present disclosure may focus on OFDM links for clarity, it should be understood that the same principles can also be applied to DFT-s-OFDMA waveforms.

[0048] In this disclosure, a frame refers to a duration of 10 ms used for wireless transmission, where each frame consists of 10 subframes of 1 ms each. On a given carrier, there may be one set of frames in the UL and another set of frames in the DL. Now referring to Figure 3 , shows an enlarged view of an exemplary DL subframe 302 showing an OFDM resource grid 304. However, as will be readily appreciated by those skilled in the art, the PHY transmission structure for any particular application may differ from the examples described herein depending on any number of factors. Here, time is measured in units of OFDM symbols in the horizontal direction, and frequency is measured in units of subcarriers or tones in the vertical direction.

[0049] Resource grid 304 can be used to schematically represent the time-frequency resources of a given antenna port. That is, in a MIMO implementation with multiple available antenna ports, corresponding multiple resource grids 304 can be used for communication. Resource grid 304 is divided into multiple resource elements (REs) 306. RE, which is 1 subcarrier × 1 symbol, is the smallest discrete part of the time-frequency grid and contains a single complex value representing data from a physical channel or signal. Depending on the modulation utilized in a specific implementation, each RE can represent one or more bits of information. In some examples, a block of REs can be referred to as a physical resource block (PRB) or more simply a resource block (RB) 308, which contains any suitable number of consecutive subcarriers in the frequency domain. In one example, an RB may contain 12 subcarriers, regardless of the numerology used. In some examples, depending on the numerology, an RB may include any suitable number of consecutive OFDM symbols in the time domain. In the present disclosure, it is assumed that a single RB (such as RB 308) corresponds entirely to a single communication direction (transmission or reception of a given device).

[0050] A UE typically utilizes only a subset of the resource grid 304. An RB may be the smallest unit of resources that may be allocated to a UE. Thus, the more RBs scheduled for a UE and the higher the modulation scheme selected for the air interface, the higher the data rate for the UE.

[0051] In this illustration, RB 308 is shown as occupying less than the entire bandwidth of subframe 302, and some subcarriers are shown above and below RB 308. In a given implementation, subframe 302 may have a bandwidth corresponding to any number of one or more RBs 308. Furthermore, in this illustration, although RB 308 is shown as occupying less than the entire duration of subframe 302, this is only one possible example.

[0052] Each 1 ms subframe 302 may consist of one or more adjacent time slots. Figure 3 In the example shown in , as an illustrative example, a subframe 302 includes four time slots 310. In some examples, a time slot can be defined according to a specified number of OFDM symbols with a given cyclic prefix (CP) length. For example, a time slot may include 7 or 14 OFDM symbols with a nominal CP. Additional examples may include mini-slots with shorter durations (e.g., one or two OFDM symbols). In some cases, these mini-slots may be sent, thereby occupying resources scheduled for ongoing time slot transmissions by the same or different UEs.

[0053] An expanded view of one of the time slots 310 shows that the time slot 310 includes a control region 312 and a data region 314. In general, the control region 312 may carry a control channel (e.g., PDCCH), and the data region 314 may carry a data channel (e.g., PDSCH or PUSCH). Of course, a time slot may contain all DL, all UL, or at least one DL portion and at least one UL portion. Figure 3 The simple structure shown in is merely exemplary in nature, and different slot structures may be utilized and may include one or more of each of one or more control regions and one or more data regions.

[0054] Although not in Figure 3 308, but various REs 306 within RB 308 may be scheduled to carry one or more physical channels, including control channels, shared channels, data channels, etc. Other REs 306 within RB 308 may also carry pilot or reference signals, including but not limited to demodulation reference signals (DMRS), control reference signals (CRS), or sounding reference signals (SRS). These pilot or reference signals may be provided to a receiving device to perform channel estimation of the corresponding channel, which may enable coherent demodulation / detection of control and / or data channels within RB 308.

[0055] In a DL transmission, a transmitting device (e.g., a scheduling entity 108) may allocate one or more REs 306 (e.g., within a control region 312) to one or more scheduled entities 106 to carry DL control information 114 including one or more DL control channels, such as PBCH, PSS, SSS, physical control format indicator channel (PCFICH), physical hybrid automatic repeat request (HARQ) indicator channel (PHICH), and / or physical downlink control channel (PDCCH). The PCFICH provides information to assist a receiving device in receiving and decoding the PDCCH. The PDCCH carries downlink control information (DCI), which includes, but is not limited to, power control commands, scheduling information, grants, and / or allocations of REs for DL ​​and UL transmissions. The PHICH carries HARQ feedback transmissions, such as acknowledgements (ACKs) or negative acknowledgements (NACKs). HARQ is a technique well known to those of ordinary skill in the art, wherein the integrity of packet transmissions may be checked at the receiving side to ensure accuracy, for example, using any suitable integrity checking mechanism, such as a checksum or cyclic redundancy check (CRC). If the integrity of the transmission is confirmed, an ACK may be sent, whereas if not, a NACK may be sent. In response to the NACK, the transmitting device may send a HARQ retransmission, which may implement chase combining, incremental redundancy, and the like.

[0056] In an UL transmission, a transmitting device (e.g., a scheduled entity 106) may utilize one or more REs 306 to carry UL control information 118 including one or more UL control channels, such as a physical uplink control channel (PUCCH), to a scheduling entity 108. The UL control information may include various packet types and categories including pilots, reference signals, and information configured to enable or assist in decoding uplink data transmissions. In some examples, the control information 118 may include a scheduling request (SR), e.g., a request to the scheduling entity 108 to schedule an uplink transmission. Here, in response to the SR sent on the control channel 118, the scheduling entity 108 may send downlink control information 114 that may schedule resources for uplink packet transmission. The UL control information may also include HARQ feedback, channel state feedback (CSF), or any other suitable UL control information.

[0057] In addition to control information, one or more REs 306 may be allocated for user data or traffic data (e.g., within data region 314). Such traffic may be carried on one or more traffic channels, such as, for DL ​​transmissions, on a physical downlink shared channel (PDSCH); or for UL transmissions, on a physical uplink shared channel (PUSCH). In some examples, one or more REs 306 within data region 314 may be configured to carry system information blocks (SIBs), which carry information that may enable access to a given cell.

[0058] In addition, in a sidelink network such as a C-V2X network, the control area 312 of the time slot 310 may include sidelink control information sent by the transmitting sidelink device to a group of one or more receiving sidelink devices near the transmitting sidelink device. In some examples, the sidelink control information may include synchronization information to synchronize the communication performed by multiple sidelink devices on the sidelink channel. In addition, the sidelink control information may include scheduling information indicating one or more resource blocks within the data area 314 of the time slot 310 reserved by the transmitting sidelink device for sending sidelink data to a group of one or more receiving sidelink devices. For example, the control area 312 of the time slot 310 may include scheduling information, and the data area 314 of the time slot 310 may include sidelink data sent according to the scheduling information. The scheduling information may further relate to an expected subsequent transmission in a subsequent time slot and / or to a transmission across multiple time slots. For example, a sidelink device may reserve resource blocks across multiple time slots for large transmissions. By reserving resources for subsequent transmissions, another nearby sidelink device can avoid using the same (or overlapping) resources to avoid interfering with the intended transmission. In some examples, the scheduling information may further include information related to the data, such as the modulation and coding scheme used for the data. In some examples, the control information may be sent within a physical sidelink control channel (PSCCH) and the data may be sent within a physical sidelink shared channel (PSSCH).

[0059] The two main technologies that V2X networks can use include dedicated short-range communications (DSRC) based on the IEEE 802.11p standard and cellular V2X based on LTE and / or 5G (new radio) standards. C-V2X is designed to be compatible with 4G LTE and emerging new radio (NR) technologies, enabling C-V2X devices to support both C-V2X connections and LTE and / or NR connections. Various aspects of the present disclosure may relate to new radio (NR) cellular V2X networks. However, it should be understood that the concepts disclosed herein may not be limited to a specific V2X standard.

[0060] Described above and in Figure 1 and Figure 3 The channels or carriers shown in are not necessarily all channels or carriers that may be used between the scheduling entity 108 and the scheduled entity 106, and one of ordinary skill in the art will recognize that other channels or carriers, such as other traffic, control, and feedback channels, may be utilized in addition to those illustrated.

[0061] These physical channels are usually multiplexed and mapped to transport channels for processing at the medium access control (MAC) layer. Transport channels carry blocks of information called transport blocks (TBs). The transport block size (TBS), which may correspond to the number of bits of information, may be a controlled parameter based on the modulation and coding scheme (MCS) and the number of RBs in a given transmission.

[0062] Figure 4 4 is a block diagram illustrating an example of a hardware implementation for a scheduling entity 400 employing a processing system 414. For example, the scheduling entity 400 may be such as Figure 1 and / or Figure 2 The scheduling entity 400 may be configured to schedule a wireless wide area network (WWAN) such as Figure 1 and / or Figure 2 Communications within the RAN) shown in .

[0063] The scheduling entity 400 may be implemented with a processing system 414 including one or more processors 404. Examples of processors 404 include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described throughout the present disclosure. In various examples, the scheduling entity 400 may be configured to perform any one or more of the functions described herein. That is, the processor 404 utilized in the scheduling entity 400 may be used to implement the following description and in Fig.11 Any one or more of the processes and procedures shown.

[0064] In this example, the processing system 414 can be implemented with a bus architecture, which is generally represented by bus 402. Bus 402 may include any number of interconnecting buses and bridges depending on the specific application and overall design constraints of the processing system 414. Bus 402 communicatively couples various circuits including one or more processors (generally represented by processor 404), memory 405, and computer-readable media (generally represented by computer-readable media 406). Bus 402 may also link various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described any further. Bus interface 408 provides an interface between bus 402 and transceiver 410. Transceiver 410 provides a communication interface or component for communicating with various other devices via a transmission medium. Depending on the nature of the device, a user interface 412 (e.g., keyboard, display, speaker, microphone, joystick) may also be provided. Of course, such a user interface 412 is optional and may be omitted in some examples, such as a base station.

[0065] In some aspects of the present disclosure, the processor 404 may include circuits configured for various functions. For example, the processor 404 may include a sidelink transmission mode indication receiving circuit 440, which is configured for various functions, including, for example, receiving a sidelink transmission configuration from a user equipment, and / or receiving an indication of a sidelink transmission mode, the sidelink transmission configuration including one or more sidelink transmission modes. For example, the sidelink transmission mode indication receiving circuit 440 may be configured to implement the following with respect to, for example, blocks 1102 and / or 1104. Fig.11 One or more of the functions described.

[0066] In some aspects of the present disclosure, processor 404 may include uplink transmission grant allocation circuitry 442 configured for various functions including, for example, allocating one or more uplink transmission grants for a wireless wide area network (WWAN) to a user device based at least on a sidelink transmission mode. For example, uplink transmission grant allocation circuitry 442 may be configured to implement the following with respect to, for example, block 1106. Fig.11 One or more of the functions described.

[0067] The processor 404 is responsible for managing the bus 402 and general processing, including executing software stored on the computer-readable medium 406. The software, when executed by the processor 404, causes the processing system 414 to perform the various functions described below for any particular device. The computer-readable medium 406 and memory 405 can also be used to store data that is manipulated by the processor 404 when executing the software.

[0068] One or more processors 404 in the processing system can execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language or other forms, software should be broadly interpreted as referring to instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, processes, functions, etc. The software can reside on a computer-readable medium 406. The computer-readable medium 406 can be a non-transitory computer-readable medium. For example, non-transitory computer-readable media include magnetic storage devices (e.g., hard disks, floppy disks, magnetic strips), optical disks (e.g., compact disks (CDs) or digital versatile disks (DVDs)), smart cards, flash memory devices (e.g., cards, sticks or key drives), random access memory (RAM), read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), registers, removable disks, and any other suitable medium for storing software and / or instructions that can be accessed and read by a computer. Computer readable medium 406 may reside in processing system 414, external to processing system 414, or distributed among multiple entities including processing system 414. Computer readable medium 406 may be embodied in a computer program product. For example, a computer program product may include the computer readable medium in packaging materials. Those skilled in the art will recognize how to best implement the described functionality presented throughout this disclosure depending on the specific application and the overall design constraints imposed on the overall system.

[0069] In one or more examples, the computer-readable storage medium 406 may include sidelink transmission mode indication receiving software 452 configured for various functions, including, for example, receiving a sidelink transmission configuration from a user device, and / or receiving an indication of a sidelink transmission mode, the sidelink transmission configuration including one or more sidelink transmission modes. For example, the sidelink transmission mode indication receiving software 452 may be configured to implement the following with respect to, for example, blocks 1102 and / or 1104. Fig.11 One or more of the functions described.

[0070] In one or more examples, the computer-readable storage medium 406 may include uplink transmission grant allocation software 454 configured for various functions, including, for example, allocating one or more uplink transmission grants for a WWAN to a user device based at least on a sidelink transmission mode. For example, the uplink transmission grant allocation software 454 may be configured to implement the following with respect to, for example, block 1106. Fig.11 One or more of the functions described.

[0071] Figure 55 is a conceptual diagram illustrating an example of a hardware implementation for an exemplary scheduled entity 500 employing a processing system 514. According to various aspects of the present disclosure, an element or any portion of an element or any combination of elements may be implemented with a processing system 514 including one or more processors 504. For example, the scheduled entity 500 may be such as Figure 1 and / or Figure 2 Any one or more of the user equipments (UEs) shown in . In some implementations, the scheduled entity 500 may be a vehicle configured to communicate in a C-V2X network and a WWAN network.

[0072] The processing system 514 may be connected to Figure 4 The processing system 514 is substantially the same as the processing system 414 shown in FIG. 5 , and the processing system 514 includes a bus interface 508, a bus 502, a memory 505, a processor 504, and a computer readable medium 506. In addition, the scheduled entity 500 may include a user interface 512 and a transceiver 510, which are substantially similar to those described above in FIG. Figure 4 That is, the processor 504 used in the scheduled entity 500 can be used to implement the following and Fig.10 Any one or more of the processes shown in .

[0073] In some aspects of the present disclosure, the processor 504 may include a sidelink transmission configuration determination circuit 540 configured for various functions, including, for example, determining a sidelink transmission configuration based on available sidelink transmission resources. For example, the sidelink transmission configuration determination circuit 540 may be configured to implement the following with respect to, for example, block 1002. Fig.10 One or more of the functions described.

[0074] In some aspects of the present disclosure, the processor 504 may include a sidelink transmission mode selection circuit 542 configured for various functions including, for example, selecting a sidelink transmission mode from one or more sidelink transmission modes based on an expected sidelink transmission. For example, the sidelink transmission mode selection circuit 542 may be configured to implement the following with respect to, for example, block 1006. Fig.10 One or more of the functions described.

[0075] In some aspects of the present disclosure, the processor 504 may include a sidelink transmission mode indication circuit 544 configured for various functions, including, for example, indicating a sidelink transmission mode to the WWAN. For example, the sidelink transmission mode indication circuit 544 may be configured to implement the following with respect to, for example, block 1008: Fig.10 One or more of the functions described.

[0076] In some aspects of the present disclosure, the processor 504 may include an uplink transmission grant receiving circuit 546 configured for various functions, including, for example, receiving one or more uplink transmission grants for the WWAN based at least on the sidelink transmission mode. For example, the uplink transmission grant receiving circuit 546 may be configured to implement the following with respect to, for example, block 1012. Fig.10 One or more of the functions described.

[0077] In some aspects of the present disclosure, the processor 504 may include a transmission circuit 548 configured for various functions, including: for example, sending a sidelink transmission configuration to the WWAN, the sidelink transmission configuration including one or more sidelink transmission modes; sending a report to the WWAN indicating the number of uplink transmission grants that were not used in a time period due to prioritization of one or more sidelink transmissions, wherein the one or more uplink transmission grants for the WWAN are also based on the report; and / or performing at least one of the following transmissions: sending first data to a user device on a sidelink channel based on the sidelink transmission mode, or sending second data to the WWAN based on the one or more uplink transmission grants. For example, the transmission circuit 548 may be configured to implement the following with respect to, for example, blocks 1004, 1010, 1014. Fig.10 One or more of the functions described.

[0078] In one or more examples, the computer-readable storage medium 506 may include sidelink transmission configuration determination software 560 configured for various functions, including, for example, determining a sidelink transmission configuration based on available sidelink transmission resources. For example, the sidelink transmission configuration determination software 560 may be configured to implement the methods described herein with respect to, for example, block 1002. Fig.10 One or more of the described functions.

[0079] In some aspects of the present disclosure, the computer-readable storage medium 506 may include sidelink transmission mode selection software 562 configured for various functions, including, for example, selecting a sidelink transmission mode from one or more sidelink transmission modes based on an expected sidelink transmission. For example, the sidelink transmission mode selection software 562 may be configured to implement the methods described herein with respect to including, for example, block 1006. Fig.10 One or more of the described functions.

[0080] In some aspects of the present disclosure, the computer-readable storage medium 506 may include sidelink transmission mode indication software 564 configured for various functions, including, for example, indicating a sidelink transmission mode to the WWAN. For example, the sidelink transmission mode indication software 564 may be configured to implement the methods described herein with respect to including, for example, block 1008. Fig.10 One or more of the described functions.

[0081] In some aspects of the present disclosure, the computer-readable storage medium 506 may include uplink transmission grant receiving software 566 configured for various functions, including, for example, receiving one or more uplink transmission grants for the WWAN based at least on the sidelink transmission mode. For example, the uplink transmission grant receiving software 566 may be configured to implement the methods described herein with respect to including, for example, block 1012. Fig.10 One or more of the described functions.

[0082] In some aspects of the present disclosure, the computer-readable storage medium 506 may include sending software 568 configured for various functions, including: for example, sending a sidelink transmission configuration to the WWAN, the sidelink transmission configuration including one or more sidelink transmission modes; sending a report to the WWAN indicating the number of uplink transmission grants that were not used in a time period due to prioritization of one or more sidelink transmissions, wherein the one or more uplink transmission grants for the WWAN are also based on the report; and / or performing at least one of the following sending: sending first data to a user device on a sidelink channel based on the sidelink transmission mode, or sending second data to the WWAN based on the one or more uplink transmission grants. For example, the sending software 568 may be configured to implement the present invention regarding including, for example, blocks 1004, 1010, 1014. Fig.10 One or more of the described functions.

[0083] Figure 6 6 shows an exemplary network 600 according to various aspects of the present disclosure. Figure 6 As shown in , the network 600 includes a first user equipment (UE) 602 (also referred to as a scheduled entity), a base station 618 (also referred to as a scheduling entity), and a second user equipment (UE) 620. In some aspects of the present disclosure, the first UE 602 may include an application processor 604, a modem device 606, and a transceiver 608. The modem device 606 may include a WWAN processing device 610 and a sidelink processing device 612. In some examples, the sidelink processing device 612 may be a cellular vehicle-to-everything (C-V2X) processing device. In some aspects of the present disclosure, the transceiver 608 may be configured to support WWAN communications (e.g., using a cellular communication protocol such as Long Term Evolution (LTE), 5G, etc. to send / receive signals) and support sidelink communications (e.g., using a direct communication protocol (such as C-V2X) to send / receive signals). For example, the intelligent transport system (ITS) 5.9 GHz band (e.g., band 47 defined by 3GPP) may be used to send / receive sidelink communications.

[0084] like Figure 6 As shown in , the first UE 602 can communicate with the base station 618 via the WWAN link 622, communicate with the second UE 620 via the side link 624, and / or communicate with the data node 626 via the side link 628. In some aspects of the present disclosure, the first UE 602 can be a first vehicle, the second UE 620 can be a second vehicle, and the data node 626 can be a roadside unit (RSU). For example, the RSU can be installed near a road, a highway, etc., and may include a transceiver capable of receiving and / or sending side link communications. In some aspects of the present disclosure, the first UE 602 can send data (e.g., time, vehicle speed, vehicle position) to the RSU via one or more side link communications. In some aspects of the present disclosure, the first UE 602 can obtain traffic information from the RSU via one or more side link communications.

[0085] In one example scenario, the application processor 604 may need to send a data payload to the base station 618. The application processor 604 may provide a first data payload to the modem device 606 via the data path 614, and the WWAN processing device 610 may process the data payload for transmission to the base station 618. The WWAN processing device 610 may provide the data payload to the transceiver 608 via the data path 616 for transmission to the base station 618 via the WWAN link 622. In another example scenario, the application processor 604 may need to send a second data payload to the second UE 620. The application processor 604 may provide the second data payload to the modem device 606 via the data path 614, and the sidelink processing device 612 may process the second data payload for transmission to the second UE 620. The sidelink processing device 612 may provide the second data payload to the transceiver 608 via the data path 616 for transmission to the second UE 620 via the sidelink 624. In yet another example scenario, the application processor 604 may need to send a third data payload to the data node 626. The application processor 604 may provide the third data payload to the modem device 606 via the data path 614, and the sidelink processing device 612 may process the third data payload for transmission to the data node 626. The sidelink processing device 612 may provide the third data payload to the transceiver 608 via the data path 616 for transmission to the data node 626 over the sidelink 628.

[0086] In some aspects of the present disclosure, since the modem device 606 is configured to handle WWAN communications (e.g., LTE, 5G, etc.) and sidelink communications (e.g., C-V2X), WWAN transmissions and sidelink transmissions may need to share resources, such as time-frequency resources. In one example, the first UE 602 may be able to perform a WWAN transmission to the base station 618 or a sidelink transmission to the second UE 620 in a given subframe, but may not be able to perform both transmissions in a given subframe. In another example, the first UE 602 may be able to perform a sidelink transmission to the second UE 620 and a WWAN transmission to the base station 618 in a given subframe, but such simultaneous sidelink and WWAN transmissions in the subframe may reduce the power headroom. For example, the first UE 602 may send a WWAN transmission and a C-V2X transmission simultaneously in a subframe, however, it may be necessary to use a lower transmission power level to send the WWAN transmission. Thus, the first UE 602 may perform transmission power sharing in some scenarios to successfully send C-V2X transmissions and WWAN transmissions in the same subframe. In some aspects of the present disclosure, if the first UE 602 needs to send a sidelink transmission to the second UE 620 in a subframe, the first UE 602 may need to skip WWAN transmissions to the base station 618 in the subframe.

[0087] In some aspects of the present disclosure, the first UE 602 may operate in a first mode (e.g., mode 3 defined by 3GPP), where time-frequency resources for WWAN and sidelink transmission are dynamically allocated to the first UE 602 by the WWAN (e.g., base station 618). In other aspects, the first UE 602 may operate in a second mode (e.g., mode 4 defined by 3GPP), where time-frequency resources for sidelink transmission are allocated to the first UE 602 in advance. In such aspects, for example, the time-frequency resources for sidelink transmission may be stored at the first UE 602 and selected autonomously by the first UE 602 (e.g., without network intervention). In some aspects of the present disclosure, the resources stored at the first UE 602 for autonomous selection and use may be referred to as available sidelink transmission resources or pre-allocated sidelink transmission resources. In some aspects of the present disclosure, such time-frequency resources for sidelink transmission stored at the first UE 602 may include one or more resource pools. For example, a resource pool may be a set of resources allocated for sidelink operations and may include subframes (e.g., one or more subframe numbers relative to a transmission frame), time slots, resource blocks within a subframe, frequencies, and any other information that may identify resources for sidelink communications.

[0088] In some aspects of the present disclosure, time-frequency resources for sidelink transmissions that may be stored at the first UE 602 and autonomously selected by the first UE 602 for transmission in the WWAN may be obtained from different networks. For example, the first UE 602 may include a first subscriber identity module (SIM) card that provides access to the C-V2X network, and may include a second SIM card that provides access to the WWAN. In this example, the first UE 602 may operate in Mode 3 defined by 3GPP, and may dynamically obtain time-frequency resources for sidelink transmissions from the C-V2X network. The first UE 602 may then indicate the obtained time-frequency resources to the WWAN.

[0089] In one aspect of the present disclosure, the first UE 602 may determine a sidelink transmission mode (also referred to as a sidelink scheduling mode or scheduling mode). For example, the sidelink transmission mode may be one of a set of predefined (e.g., preconfigured) transmission modes stored at the first UE 602. In another example, the sidelink transmission mode may be one of a set of transmission modes dynamically configured by a WWAN (e.g., a base station 618) and provided to the first UE 602. Each transmission mode may indicate one or more subframes (e.g., within a transmission frame) in which the first UE 602 is expected to transmit on the sidelink. In one aspect, and as Figure 7 As shown in , the first UE 602 may store a table 700 including N possible transmission modes and their corresponding index values. Figure 7 An example implementation of table 700 is provided in table 750 of FIG. Figure 7 As shown in , table 750 includes four possible sidelink transmission modes (e.g., mode 1 to mode 4) and their corresponding 2-bit index values. In this example implementation, mode 1 may indicate that the first UE 602 is expected to transmit on the sidelink channel in subframes 2, 3, 4, and / or 7 of the transmission frame. For example, referring to Figure 7 , Mode 1 may indicate that the first UE 602 expects to receive a transmission in subframe 2 786 (in Figure 7 abbreviated as SF2), subframe 3 788 (in Figure 7 abbreviated as SF3), subframe 4790 (in Figure 7 SF4) and / or subframe 7 792 (in Figure 7The transmission mode determined by the first UE 602 may be applied to multiple (e.g., consecutive) transmission frames in a persistent or semi-persistent manner. Continuing with the example implementation, mode 2 may indicate that the first UE 602 expects to transmit on the sidelink in subframes 2, 3, and / or 7 (e.g., subframe 2 786, subframe 3 788, and / or subframe 7 792 in transmission frame 780), mode 3 may indicate that the first UE 602 expects to transmit on the sidelink channel in subframes 4, 7, and / or 8 (e.g., subframe 4 790, subframe 7 792, and / or subframe 8 794 in transmission frame 780), and mode 4 may indicate that the first UE 602 expects to transmit on the sidelink in subframes 8 and 9 (e.g., subframe 8 974 and / or subframe 7 966 in transmission frame 780).

[0090] In some aspects of the present disclosure, the first UE 602 may further determine a time slot and / or resource block (RB) of a subframe in which the first UE 602 is expected to transmit on the sidelink. Figure 8 , the first UE 602 may determine the time slot(s) (e.g., time slot 1 804 and / or time slot 2 806) of the subframe 800 in which the first UE 602 is expected to transmit on the sidelink channel and the resource blocks in the time slot(s) to be used for the sidelink transmission. For example, the first UE 602 may determine that resource blocks 812 to 814 and resource blocks 816 to 818 in time slot 2 806 are to be used for the sidelink transmission. In some aspects of the present disclosure, the resource blocks in the subframe that the first UE 602 may use for the sidelink transmission may be stored at the first UE 602 as a resource pool.

[0091] In some aspects of the present disclosure, the first UE 602 may determine the periodicity of one or more sidelink transmissions (e.g., a sidelink transmission every 100 ms, a sidelink transmission every 500 ms, etc.), a power level for one or more sidelink transmissions, a priority of one or more sidelink transmissions (e.g., high, medium, low), an estimated power headroom for one or more sidelink transmissions, and / or services associated with one or more sidelink transmissions. For example, the estimated power headroom may be a single value (e.g., 16 decibel-milliwatts (dBm)) or a range of values ​​(e.g., 16 dBm to 23 dBm). In some aspects of the present disclosure, the WWAN (e.g., the base station 618) may configure the transmission power to be used by the first UE 602 for sidelink transmissions (e.g., for transmission of the second data payload and / or the third data payload described previously) and / or WWAN transmissions based on the sidelink transmission mode indicated by the first UE 602.

[0092] In some aspects of the present disclosure, each previously described transmission mode can be associated with a priority level. For example, each type of priority level can be mapped to a number (e.g., 1, 2, or 3) or a binary value (e.g., "00", "01", "10"). For example, a binary value of "00" can indicate a high priority (e.g., the highest priority), a binary value of "01" can indicate a medium priority, and a binary value of "10" can indicate a low priority (e.g., the lowest priority). For example, referring to Figure 7 , mode 1 in table 750 may be associated with a high priority level, and mode 4 in table 750 may be associated with a low priority level. In some aspects of the present disclosure, the high priority level may indicate an emergency C-V2X transmission, such as a transmission indicating that the vehicle is braking. In some aspects of the present disclosure, the WWAN (e.g., base station 618) may not cause the first UE 602 to skip a sidelink transmission that has been designated as a high priority for the purpose of allocating resources for WWAN transmissions in a given subframe. In some aspects of the present disclosure, the low priority level may indicate a non-emergency C-V2X transmission, such as a transmission indicating that the vehicle is stopping. In some aspects of the present disclosure, the WWAN (e.g., base station 618) may cause the first UE 602 to skip a sidelink transmission that has been designated as a low priority for the purpose of allocating resources for WWAN transmissions in a given subframe. Therefore, in some cases, the ability of the WWAN to overrule a low priority sidelink transmission scheduled in a subframe may provide resource scheduling flexibility for the WWAN.

[0093] Now refer to Fig. 9 The signal flow diagram 900 in FIG. 1 is used to describe the exemplary operation of the present disclosure. Fig. 9At block 910, the first UE 602 may enter (e.g., initiate) an operating mode (e.g., Mode 4 defined by 3GPP). At block 912, the first UE 602 may determine a sidelink transmission configuration. In one aspect of the present disclosure, the sidelink transmission configuration may include one or more possible sidelink transmission modes (e.g., as previously described with reference to FIG. 1 ) from which the first UE 602 may select for sidelink transmission. Figure 7 The transmission modes 1 to N and their corresponding index values). In other aspects of the present disclosure, the sidelink transmission configuration may include one or more possible sidelink transmission modes, and may further include (e.g., for each sidelink transmission mode) a set of time slots of subframes in which the first UE 602 expects to transmit on the sidelink, a set of resource blocks of subframes in which the first UE 602 expects to transmit on the sidelink, a power level for one or more sidelink transmissions, a priority of one or more sidelink transmissions (e.g., a priority associated with each of the one or more sidelink transmission modes), an estimated power margin for one or more sidelink transmissions, and / or services associated with one or more sidelink transmissions. In some aspects of the present disclosure, the network may be configured to determine one or more previous information items that may be included in the sidelink transmission configuration based on the indicated services associated with the one or more sidelink transmissions. As Fig. 9 As shown in , the first UE 602 may send a sidelink transmission configuration to the base station 618 in a message 914. In an aspect of the disclosure, the message 914 may be a radio resource control (RRC) message.

[0094] At block 916, the first UE 602 may select a sidelink transmission mode (e.g., from one or more possible sidelink transmission modes previously provided to the base station 618 via message 914). Such a selection may be referred to as a first sidelink transmission mode selection. In one aspect of the present disclosure, the first UE 602 may select a sidelink transmission mode based on the type of environment in which the first UE 602 is currently located. For example, if the first UE 602 is located in a large city with busy highways, the first UE 602 may select a sidelink transmission mode that includes more resources for sidelink transmissions (e.g., C-V2X transmissions), such as a first sidelink transmission mode selection. Figure 7 However, if the first UE 602 is located in a small suburban area, the first UE 602 may select a sidelink transmission mode that includes fewer resources for sidelink transmission (e.g., C-V2X transmission), such as Figure 7 Mode 4 in Table 750.

[0095] The base station 618 may send a first uplink (UL) grant (also referred to as a UL transmission grant) for the WWAN transmission via message 918. The first UE 602 may use the resources indicated in the first UL grant to send a sidelink transmission mode to the base station 618 via message 920. In some aspects of the present disclosure, the first UE 602 may use a medium access control (MAC) control element (CE) of a MAC frame to send the sidelink transmission mode. In some aspects of the present disclosure, the MAC CE may include multiple bytes (e.g., 8 bytes), and a first group of bits in the MAC CE (e.g., 2 bits) may be allocated for transmitting an index value of the selected sidelink transmission mode. For example, referring to Figure 7 , if the first UE 602 selects mode 1, the first UE 602 may set the first group of bits in the MAC CE to "00". As another example, if the first UE 602 selects mode 3, the first UE 602 may set the first group of bits in the MAC CE to "10". It can be understood that in the case where the first UE 602 frequently changes the sidelink transmission mode, using the MAC CE to transmit the selected sidelink transmission mode can significantly reduce the signaling overhead. In some aspects of the present disclosure, the MAC CE may further include a second group of bits (e.g., one bit) that can be used by the first UE 602 to indicate whether the first UE 602 is active or inactive. In some aspects of the present disclosure, the MAC CE may further include a third group of bits (e.g., one bit) that can be used by the first UE 602 to enable / disable C-V2X communication. In various aspects described herein, there may be a prior agreement between the first UE 602 and the base station 618 regarding the allocation and meaning of the bit values ​​in the previously described MAC CE.

[0096] Thus, by providing the selected sidelink transmission mode to the base station 618, the base station 618 will know when (e.g., in which subframes) the first UE 602 is expected to transmit on the sidelink channel. Since the first UE 602 may not be able to send both sidelink transmissions and WWAN transmissions in a given subframe (or may have limited WWAN transmission capabilities in a subframe that includes a sidelink transmission), the base station 618 may consider the selected sidelink transmission mode when allocating UL grants for WWAN transmissions to the first UE 602. For example, the base station 618 may avoid allocating UL grants for WWAN transmissions in subframes in which the first UE 602 is expected to send sidelink signals. By avoiding allocating such UL grants to the first UE 602 for WWAN transmissions, the network may allocate the UL grants to other UEs that may use the UL grants, thereby improving network capacity. In some aspects of the present disclosure, the base station 618 may allocate a smaller UL grant for WWAN transmissions (eg, instead of a larger UL grant) for subframes that coincide with subframes in which the first UE 602 is expected to transmit on the sidelink channel.

[0097] like Fig. 9 As shown in , the base station 618 can send a second UL grant for the WWAN transmission via message 922. In some aspects of the present disclosure, the second UL grant for the WWAN transmission can be based on the sidelink transmission mode of the message 920 and does not include one or more subframes that can be used by the first UE 602 for the sidelink transmission. In some examples, the second UL grant for the WWAN transmission may include a reduced amount of resources in one or more subframes that can be used by the first UE 602 for the sidelink transmission. For example, the base station 618 can learn from the sidelink transmission mode of the message 920 that the first UE 602 can use the one or more subframes for the sidelink transmission.

[0098] At block 924, the first UE 602 may select a different transmission mode for the sidelink transmission (e.g., from one or more possible sidelink transmission modes previously provided to the base station 618 via message 914). Such a selection may be referred to as a second sidelink transmission mode selection. In one aspect of the present disclosure, the first UE 602 may select a different transmission mode based on a change in the current environment of the first UE 602 or based on a change in the resource requirements of the first UE 602. For example, if the first UE 602 has previously selected the second sidelink transmission mode selection described herein, Figure 1 If the first UE 602 has moved to a suburban area and now needs less resources for C-V2X transmission, the first UE 602 may select Mode 1 described in Table 750 of the present invention. Figure 1Mode 4 described in Table 750 in . The first UE 602 may use the resources indicated in the second UL grant for WWAN transmission to transmit a different sidelink transmission mode (e.g., mode 4 in Table 750) to the base station 618 via message 926. In some aspects of the present disclosure, the first UE 602 may use the medium access MAC CE of the MAC frame as previously discussed to send different sidelink transmission modes. For example, the first UE 602 may include an index value "11" corresponding to mode 4 in the MAC CE. The base station 618 may send a third UL grant for WWAN transmission via message 928. In some aspects of the present disclosure, the third UL grant for WWAN transmission may be based on the sidelink transmission mode of message 926 and not include one or more subframes that can be used by the first UE 602 for sidelink transmission. In some aspects of the present disclosure, the third UL grant for WWAN transmission may include a reduced amount of resources in one or more subframes that can be used by the first UE 602 for sidelink transmission. For example, the base station 618 may learn from the sidelink transmission mode of the message 926 one or more subframes that may be used by the first UE 602 for sidelink transmission.

[0099] In some aspects of the present disclosure, if the sidelink transmission to be performed in a given subframe is a C-V2X transmission intended to carry a message related to vehicle warning and / or safety, the first UE 602 may not skip the C-V2X transmission in the subframe. In addition, because, as previously described, the modem device 606 is configured to handle both WWAN communications (e.g., LTE, 5G, etc.) and sidelink communications (e.g., C-V2X) (e.g., this may require sharing available time-frequency resources in each subframe), there may not be enough available resources in the subframe carrying C-V2X transmissions to adequately carry the WWAN transmissions. Therefore, in some aspects of the present disclosure, it may be necessary to skip the WWAN transmission in the subframe carrying the C-V2X transmission. In other aspects of the present disclosure, the first UE 602 may send both the WWAN transmission and the C-V2X transmission in a subframe, but may need to use a lower transmission power level to send the WWAN transmission. Therefore, the first UE 602 can perform transmission power sharing in some scenarios to successfully send C-V2X transmissions and WWAN transmissions in the same subframe.

[0100] In some aspects of the present disclosure, the first UE 602 may send a transmission interruption indicator to the base station 618. For example, if the first UE 602 needs to send an immediate C-V2X transmission that does not conform to the sidelink transmission mode provided to the base station 618 (e.g., an emergency message to transmit an emergency situation, such as an unavoidable collision of vehicles), the first UE 602 may send a transmission interruption indicator to the base station 618 using a UL grant from the base station. Thus, in some examples, the transmission interruption indicator may indicate to the base station 618 that the first UE 602 may be sending an unexpected sidelink transmission in multiple upcoming subframes (e.g., three consecutive subframes), and such sidelink transmissions may not correspond to any sidelink transmission mode. In some aspects of the present disclosure, the transmission interruption indicator may be implemented as a single bit in a MAC CE and may be switched on and off by the first UE 602 as needed. In other aspects of the present disclosure, multiple bits in the MAC CE may be used to transmit the transmission interruption indicator.

[0101] In some aspects of the present disclosure, a sidelink transmission mode provided from the first UE 602 to the base station 618 may be associated with a channel (e.g., a sidelink channel or a PC5 carrier in the case of PC5 carrier aggregation). In these aspects, the first UE 602 may indicate to the base station 618 the channel associated with the sidelink transmission mode. In some aspects of the present disclosure, the first UE 602 may access multiple sidelink channels, and each of the multiple sidelink channels may correspond to a different group of sidelink transmission modes. For example, if the first UE 602 is configured to access two sidelink channels, a first group of sidelink transmission modes may be associated with the first sidelink channel, and a second group of sidelink transmission modes may be associated with the second sidelink channel. Reference Figure 7, for example, sidelink transmission modes 1 and 2 may be used for a first sidelink channel, while sidelink transmission modes 3 and 4 may be used for a second sidelink channel. In some aspects of the present disclosure, each sidelink channel may be configured for a different purpose. For example, a first sidelink channel may be configured to carry C-V2X transmissions between a vehicle and a traffic light, a stop sign, and / or other road infrastructure, and a second sidelink channel may be configured to carry C-V2X transmissions between vehicles. It should be understood that in other aspects, the first UE 602 may utilize more than two sidelink channels. In some aspects of the present disclosure, the first UE 602 may indicate the availability of multiple sidelink channels and the sidelink transmission modes associated with the multiple sidelink channels to the base station 618 via the sidelink transmission configuration in the message 914. In such an aspect, when the first UE 602 sends a sidelink transmission mode to the base station 618 using a medium access control (MAC) control element (CE) of a MAC frame, the base station 618 can know the sidelink channel associated with the sidelink transmission mode he selected.

[0102] In some aspects of the present disclosure, the first UE 602 may report to the base station 618 the number (or approximate number) of UL transmission grants for the WWAN that the first UE 602 did not use in a time period due to prioritization of sidelink transmissions (e.g., C-V2X transmissions). The base station 618 may consider the number of UL transmission grants that the first UE 602 did not use when allocating UL transmission grants to the first UE 602. For example, the base station 618 may reduce (e.g., on average) the size and / or number of UL transmission grants for the WWAN instead of avoiding allocating UL transmission grants to the first UE 602 for an extended period of time. In some aspects of the present disclosure, the report may be transmitted to the base station 618 using one or more bits designated for reporting in the previously described MAC CE. For example, if two bits are allocated in the MAC CE for transmitting the report to the base station 618, a first value (e.g., a binary value of "00") may indicate that at least a first percentage (e.g., 5%) of the total UL transmission grants for the WWAN in a time period are not used due to the prioritization of sidelink transmissions (e.g., C-V2X transmissions), a second value (e.g., a binary value of "01") may indicate that at least a second percentage (e.g., 10%) of the total UL transmission grants for the WWAN in a time period are not used due to the prioritization of sidelink transmissions (e.g., C-V2X transmissions), and a third value (e.g., a binary value of "10") may indicate that at least a third percentage (e.g., 15%) of the total UL transmission grants for the WWAN in a time period are not used due to the prioritization of sidelink transmissions (e.g., C-V2X transmissions).

[0103] In some aspects of the present disclosure, the base station 618 may configure a threshold and may provide the threshold to the first UE 602. In such aspects, the first UE 602 may not send the previously described report to the base station 618 until the number of UL transmissions lost by the first UE 602 exceeds the threshold within a specified time period. In some aspects of the present disclosure, the specified time period may be configured by the base station 618. In some aspects of the present disclosure, the base station 618 may configure different thresholds for different priority levels (e.g., the number of UL transmissions for WWAN that are not used by the first UE 602). In some aspects of the present disclosure, the base station 618 may configure different thresholds for different ProSe Per-Packet Priority (PPPP) values ​​and for WWAN UL in the case of UL carrier aggregation (CA) (e.g., the number of UL transmission grants for WWAN that are not used by the first UE 602). In some aspects of the present disclosure, as previously described, whenever transmission of a report on unused UL transmission grants is triggered at the first UE 602, the first UE 602 may send a report for a certain UL carrier or may send a report for all active UL component carriers (CCs).

[0104] Therefore, by notifying the WWAN (e.g., base station 618) of the scheduling mode of the sidelink transmission from the user equipment (e.g., the first UE 602), the aspects described herein can enhance the throughput performance of the WWAN. In addition, the aspects described herein can enhance the power headroom distribution at the user equipment by reducing the occurrence of situations where the power headroom at the user equipment is limited due to dual transmissions (e.g., WWAN and sidelink transmissions) in a subframe. In addition, the aspects described herein can prevent the waste of UL resources for WWAN transmissions, thereby preserving WWAN network capacity.

[0105] Fig.10 1 is a flow chart illustrating an exemplary process 1000 according to some aspects of the present disclosure. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and certain illustrated features may not be required for implementation of all embodiments. In some examples, process 1000 may be performed by a user device (e.g., Figure 5 The process 1000 is performed by the scheduled entity 500 shown in FIG. 1 , or the first UE 602). In some examples, the process 1000 may be performed by any suitable device or component for performing the functions or algorithms described below. It should be understood that the operations indicated by the dashed lines represent optional operations.

[0106] In box 1002, a UE (e.g., a first UE 602) determines a sidelink transmission configuration based on available sidelink transmission resources. In box 1004, the UE sends the sidelink transmission configuration to the WWAN. In some examples, the sidelink transmission configuration includes one or more sidelink transmission modes. In some aspects of the present disclosure, the sidelink transmission configuration may further include at least one of the following: an indication of a set of time slots in one or more subframes, an indication of a set of resource blocks in one or more subframes, a priority associated with each of one or more sidelink transmission modes, a sidelink channel associated with each of one or more sidelink transmission modes, a power level for one or more sidelink transmissions, an estimated power margin for one or more sidelink transmissions, a periodicity of one or more sidelink transmissions, a service associated with one or more sidelink transmissions, and / or a combination thereof. In these aspects, one or more sidelink transmissions may refer to an expected sidelink transmission that the UE may send in an upcoming subframe. In some aspects of the disclosure, the indication of the sidelink transmission mode may include a power level for one or more sidelink transmissions, an estimated power headroom for one or more sidelink transmissions, and / or services associated with one or more sidelink transmissions.

[0107] In box 1006, the UE selects a sidelink transmission mode from one or more sidelink transmission modes based on the expected sidelink transmission. In box 1008, the UE indicates the sidelink transmission mode to the WWAN. In box 1010, the UE sends a report to the WWAN indicating the number of uplink transmission grants that have not been used within a time period due to the prioritization of one or more sidelink transmissions. In some aspects of the present disclosure, one or more uplink transmission grants for the WWAN are also based on the report. In box 1012, the UE receives one or more uplink transmission grants for the WWAN based at least on the sidelink transmission mode. In box 1014, the UE performs at least one of the following transmissions: sending first data to another UE (e.g., a second UE 620) on a sidelink channel based on the sidelink transmission mode, or sending second data to the WWAN based on one or more uplink transmission grants.

[0108] Fig.11 1 is a flow chart illustrating an exemplary process 1100 according to some aspects of the present disclosure. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and certain illustrated features may not be required for implementation of all embodiments. In some examples, the process 1100 may be performed by a base station (e.g., Figure 4In some examples, the process 1100 may be performed by any suitable device or component for performing the functions or algorithms described below. It should be understood that the operations indicated by dashed lines represent optional operations.

[0109] At block 1102, the base station receives a sidelink transmission configuration from a user equipment, the sidelink transmission configuration including one or more sidelink transmission modes. At block 1104, the base station receives an indication of the sidelink transmission mode. At block 1106, the base station allocates one or more uplink transmission grants for the WWAN to the user equipment based at least on the sidelink transmission mode.

[0110] In one configuration, an apparatus 400 for wireless communication includes: a component for receiving a sidelink transmission configuration from a user equipment, the sidelink transmission configuration including one or more sidelink transmission modes; a component for receiving an indication of the sidelink transmission mode; and / or a component for allocating one or more uplink transmission grants for a WWAN to the user equipment based at least on the sidelink transmission mode. In one aspect, the foregoing components may be Figure 4 The processor 404 shown in FIG. 4 is configured to perform the functions listed by the aforementioned components. In another example, the aforementioned components may be a circuit or any device configured to perform the functions listed by the aforementioned components.

[0111] Of course, in the above examples, the circuits included in the processor 404 are provided only as examples, and other components for performing the described functions may be included in various aspects of the present disclosure, including but not limited to instructions stored in the computer-readable storage medium 406, or in Figure 1 and / or Figure 2 any of which are described in and using, for example, Fig.11 Any other suitable means or components of the described processes and / or algorithms.

[0112] In one configuration, an apparatus 500 for wireless communication includes: a component for indicating a sidelink transmission mode to a WWAN; a component for receiving one or more uplink transmission grants for the WWAN based at least on the sidelink transmission mode; a component for performing at least one of the following transmissions: transmitting first data to a user device on a sidelink channel based on the sidelink transmission mode, or transmitting second data to the WWAN based on one or more uplink transmission grants; a component for transmitting a sidelink transmission configuration to the WWAN, the sidelink transmission configuration including one or more sidelink transmission modes; a component for determining the sidelink transmission configuration based on available sidelink transmission resources; a component for selecting a sidelink transmission mode from one or more sidelink transmission modes based on an expected sidelink transmission; and / or a component for transmitting a report to the WWAN indicating the number of uplink transmission grants that were not used within a time period due to prioritization of one or more sidelink transmissions, wherein the one or more uplink transmission grants for the WWAN are also based on the report. In one aspect, the aforementioned components may be Figure 5 The processor 504 shown in FIG. 5 is configured to perform the functions listed by the aforementioned components. In another example, the aforementioned components may be a circuit or any device configured to perform the functions listed by the aforementioned components.

[0113] Of course, in the above examples, the circuits included in the processor 504 are provided only as examples, and other components for performing the described functions may be included in various aspects of the present disclosure, including but not limited to instructions stored in the computer-readable storage medium 506, or in Figure 1 and / or Figure 2 any of which are described in and using, for example, Fig.10 Any other suitable means or components of the described processes and / or algorithms.

[0114] Several aspects of wireless communication networks have been presented with reference to exemplary implementations. As those skilled in the art will readily appreciate, various aspects described throughout this disclosure may be extended to other telecommunication systems, network architectures, and communication standards.

[0115] By way of example, various aspects may be implemented in other systems defined by 3GPP, such as Long Term Evolution (LTE), Evolved Packet System (EPS), Universal Mobile Telecommunications System (UMTS), and / or Global System for Mobile (GSM). Various aspects may also be extended to systems defined by the Third Generation Partnership Project 2 (3GPP2), such as CDMA2000 and / or Evolution Data Optimized (EV-DO). Other examples may be implemented in systems employing IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Ultra Wideband (UWB), Bluetooth, and / or other suitable systems. The actual telecommunication standards, network architectures, and / or communication standards employed will depend on the specific application and the overall design constraints imposed on the system.

[0116] In the present disclosure, the word "exemplary" is used to mean "serving as an example, instance, or illustration". Any implementation or aspect described herein as "exemplary" is not necessarily to be construed as being preferred or advantageous over other aspects of the present disclosure. Likewise, the term "aspect" does not require that all aspects of the present disclosure include the discussed features, advantages, or modes of operation. The term "coupled" is used herein to refer to a direct or indirect coupling between two objects. For example, if object A physically contacts object B, and object B contacts object C, objects A and C may still be considered coupled to each other even if they are not in direct physical contact with each other. For example, a first object may be coupled to a second object even if the first object never makes direct physical contact with the second object. The terms "circuit" and "loop" are used broadly and are intended to include hardware implementations of electrical devices and conductors that, when connected and configured, are capable of implementing the functions described in the present disclosure, without limitation to the type of electronic circuits, and software implementations of information and instructions that, when executed by a processor, are capable of performing the functions described in the present disclosure.

[0117] Figures 1 to 11 One or more of the components, steps, features and / or functions shown in the drawings can be rearranged and / or combined into a single component, step, feature or function, or can be embodied as multiple components, steps or functions. Additional elements, components, steps and / or functions can also be added without departing from the novel features disclosed herein. Figures 1 to 11 The devices, apparatuses and / or components shown in the figure may be configured to perform one or more of the methods, features or steps described herein. The novel algorithms described herein may also be effectively implemented in software and / or embedded in hardware.

[0118] It is understood that the specific order or hierarchy of steps in the disclosed methods is an illustration of exemplary processes. It is understood that the specific order or hierarchy of steps in the methods may be rearranged based on design preferences. The accompanying method claims present elements of the various steps in an example order, and are not meant to be limited to the specific order or hierarchy presented, unless specifically recited therein.

[0119] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but should be given a full scope consistent with the language of the claims, wherein unless otherwise specified, reference to an element in the singular is not intended to mean "one and only one", but "one or more". Unless otherwise expressly stated, the term "some" refers to one or more. A phrase referring to "at least one of" a list of items refers to any combination of those items, including a single member. As an example, "at least one of a, b, or c" is intended to cover: a; b; c; a and b; a and c; b and c; and a, b, and c. All structural and functional equivalents of elements throughout the various aspects described in this disclosure that are known or will be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. Moreover, nothing disclosed herein is intended to be donated to the public, regardless of whether it is explicitly stated in the claims.

Claims

1. A method for a first user device, comprising: indicating a sidelink transmission mode to a wireless wide area network (WWAN), wherein the sidelink transmission mode indicates at least one subframe in which the sidelink transmission is expected to occur; receiving one or more uplink transmission grants for the WWAN based at least on the sidelink transmission mode; Perform at least one of the following transmissions: transmitting first data to a second user equipment on a sidelink channel based on the sidelink transmission mode, or transmitting second data to the WWAN based on the one or more uplink transmission grants; as well as sending a report to the WWAN indicating a number of uplink transmission grants that were not used in a time period due to prioritization of one or more sidelink transmissions, wherein the report is sent when the number of uplink transmission grants that were not used in the time period exceeds a threshold, The one or more uplink transmission grants for the WWAN are further based on the report.

2. The method according to claim 1, further comprising: A sidelink transmission configuration is sent to the WWAN, the sidelink transmission configuration comprising one or more sidelink transmission modes.

3. The method according to claim 2, further comprising: The sidelink transmission configuration is determined based on available sidelink transmission resources.

4. The method according to claim 2, further comprising: The sidelink transmission mode is selected from the one or more sidelink transmission modes based on an expected sidelink transmission.

5. The method according to claim 2, wherein: Each of the one or more sidelink transmission patterns indicates one or more subframes in which sidelink transmission is expected.

6. The method according to claim 5, wherein: The one or more uplink transmission grants for the WWAN exclude the one or more subframes in which the sidelink transmission is expected.

7. The method according to claim 5, wherein: The one or more uplink transmission grants for the WWAN include smaller resource grants in the one or more subframes in which the sidelink transmission is expected to occur relative to resource grants in subframes that do not include the one or more subframes in which the sidelink transmission is expected to occur.

8. The method according to claim 2, wherein: The sidelink transmission configuration also includes at least one of: an indication of a set of time slots in one or more subframes, an indication of a set of resource blocks in the one or more subframes, a priority associated with each of the one or more sidelink transmission modes, a sidelink channel associated with each of the one or more sidelink transmission modes, a power level for one or more sidelink transmissions, an estimated power margin for the one or more sidelink transmissions, a periodicity of the one or more sidelink transmissions, a service associated with the one or more sidelink transmissions, and / or a combination thereof.

9. The method according to claim 8, wherein: The indication of the sidelink transmission mode comprises at least one of: a power level for the one or more sidelink transmissions, an estimated power headroom for the one or more sidelink transmissions, or a service associated with the one or more sidelink transmissions.

10. The method according to claim 1, wherein: The second user device is a vehicle and the sidelink channel is a cellular vehicle-to-everything (C-V2X) channel.

11. The method according to claim 1, wherein: The sidelink transmission mode is preconfigured at the first user equipment or dynamically configured by the WWAN.

12. The method according to claim 1, further comprising: Based on the sidelink transmission mode, third data is sent to the data node on the sidelink channel.

13. The method according to claim 12, wherein: A transmission power for transmission of the first data, the second data, or the third data is configured by the WWAN based on the sidelink transmission mode.

14. An apparatus for wireless communication, comprising: processor; a transceiver communicatively coupled to the processor; and a memory communicatively coupled to the processor, Wherein, the processor is configured to: indicating a sidelink transmission mode to a wireless wide area network (WWAN), wherein the sidelink transmission mode indicates at least one subframe in which the sidelink transmission is expected to occur; receiving one or more uplink transmission grants for the WWAN based at least on the sidelink transmission mode; Perform at least one of the following transmissions: transmitting first data to a user equipment on a sidelink channel based on the sidelink transmission mode, or transmitting second data to the WWAN based on the one or more uplink transmission grants; and sending a report to the WWAN indicating a number of uplink transmission grants that were not used in a time period due to prioritization of one or more sidelink transmissions, wherein the report is sent when the number of uplink transmission grants that were not used in the time period exceeds a threshold, The one or more uplink transmission grants for the WWAN are further based on the report.

15. The device according to claim 14, wherein: The processor is further configured to: A sidelink transmission configuration is sent to the WWAN, the sidelink transmission configuration comprising one or more sidelink transmission modes.

16. The device according to claim 15, wherein: The processor is further configured to: The sidelink transmission configuration is determined based on available sidelink transmission resources.

17. The device according to claim 15, wherein: The processor is further configured to: The sidelink transmission mode is selected from the one or more sidelink transmission modes based on an expected sidelink transmission.

18. The device according to claim 15, wherein: Each of the one or more sidelink transmission patterns indicates one or more subframes in which sidelink transmission is expected.

19. The device according to claim 18, wherein: The one or more uplink transmission grants for the WWAN exclude the one or more subframes in which sidelink transmissions are expected.

20. The device according to claim 18, wherein The one or more uplink transmission grants for the WWAN include smaller resource grants in the one or more subframes in which the sidelink transmission is expected, relative to resource grants in subframes that do not include the one or more subframes in which the sidelink transmission is expected.

21. The device according to claim 15, wherein: The sidelink transmission configuration also includes at least one of: an indication of a set of time slots in one or more subframes, an indication of a set of resource blocks in the one or more subframes, a priority associated with each of the one or more sidelink transmission modes, a sidelink channel associated with each of the one or more sidelink transmission modes, a power level for one or more sidelink transmissions, an estimated power margin for the one or more sidelink transmissions, a periodicity of the one or more sidelink transmissions, a service associated with the one or more sidelink transmissions, and / or a combination thereof.

22. The device according to claim 21, wherein The indication of the sidelink transmission mode comprises at least one of: a power level for the one or more sidelink transmissions, an estimated power headroom for the one or more sidelink transmissions, or a service associated with the one or more sidelink transmissions.

23. An apparatus for a first user equipment, comprising: means for indicating a sidelink transmission mode to a wireless wide area network (WWAN), wherein the sidelink transmission mode indicates at least one subframe in which the sidelink transmission is expected to occur; means for receiving one or more uplink transmission grants for the WWAN based at least on the sidelink transmission mode; means for at least one of: transmitting first data to a second user equipment on a sidelink channel based on the sidelink transmission mode, or transmitting second data to the WWAN based on the one or more uplink transmission grants; as well as means for sending a report to the WWAN indicating a number of uplink transmission grants that were not used in a time period due to prioritization of one or more sidelink transmissions, wherein the report is sent when the number of uplink transmission grants that were not used in the time period exceeds a threshold, The one or more uplink transmission grants for the WWAN are further based on the report.

24. The apparatus according to claim 23, further comprising: Means for sending a sidelink transmission configuration to the WWAN, the sidelink transmission configuration comprising one or more sidelink transmission modes.

25. The device according to claim 24, wherein: Each of the one or more sidelink transmission patterns indicates one or more subframes in which sidelink transmission is expected.

26. The device according to claim 25, wherein The one or more uplink transmission grants for the WWAN exclude the one or more subframes in which the sidelink transmission is expected.

27. The device according to claim 25, wherein: The one or more uplink transmission grants for the WWAN include smaller resource grants in the one or more subframes in which the sidelink transmission is expected to occur relative to resource grants in subframes that do not include the one or more subframes in which the sidelink transmission is expected to occur.

28. The device according to claim 24, wherein: The sidelink transmission configuration also includes at least one of: an indication of a set of time slots in one or more subframes, an indication of a set of resource blocks in the one or more subframes, a priority associated with each of the one or more sidelink transmission modes, a sidelink channel associated with each of the one or more sidelink transmission modes, a power level for one or more sidelink transmissions, an estimated power margin for the one or more sidelink transmissions, a periodicity of the one or more sidelink transmissions, a service associated with the one or more sidelink transmissions, and / or a combination thereof.

29. The device according to claim 23, wherein: The sidelink transmission mode is preconfigured at the first user equipment or dynamically configured by the WWAN.

30. The apparatus of claim 23, further comprising: Means for transmitting third data to a data node on the sidelink channel based on the sidelink transmission mode.

31. A non-transitory computer-readable medium having stored therein instructions executable by a processor of a first user device to: indicating a sidelink transmission mode to a wireless wide area network (WWAN), wherein the sidelink transmission mode indicates at least one subframe in which the sidelink transmission is expected to occur; receiving one or more uplink transmission grants for the WWAN based at least on the sidelink transmission mode; Initiate at least one of the following transmissions: transmit first data to a second user equipment on a sidelink channel based on the sidelink transmission mode, or transmit second data to the WWAN based on the one or more uplink transmission grants; as well as sending a report to the WWAN indicating a number of uplink transmission grants that were not used within a time period due to prioritization of one or more sidelink transmissions, wherein when the number of the uplink transmission grants that have not been used within the time period exceeds a threshold, sending the report, The one or more uplink transmission grants for the WWAN are further based on the report.

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