Method and apparatus for superposition transmission of sidelink and uplink

Abstract

Various aspects relate to a mechanism for a wireless communication device to generate a superimposed transmission of a sidelink signal to be transmitted to at least one receiving wireless communication device and an uplink signal to be transmitted to a base station. The wireless communication device may transmit the superimposed transmission on a common carrier for both the sidelink transmission and the uplink transmission on resources allocated by the base station. The superimposed transmission includes a base layer corresponding to the uplink signal and an enhancement layer corresponding to the sidelink signal. The wireless communication device may further generate and transmit interference assistance information to the receiving wireless communication device for use by the receiving wireless communication device in eliminating the base layer from the superimposed transmission.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to and the benefit of pending non-provisional application No. 17 / 127,574 filed in the U.S. Patent and Trademark Office on December 18, 2020, and provisional application No. 62 / 965,756 filed in the U.S. Patent and Trademark Office on January 24, 2020, both of which are assigned to the assignee of this application and are hereby expressly incorporated herein by reference as if fully set forth below and for all applicable purposes. Technical Field

[0003] The techniques discussed below relate generally to wireless communication networks, and more particularly to performing concurrent sidelink and uplink communications.

[0004] introduction

[0005] In many existing wireless communication systems, cellular networks are implemented by enabling wireless communication devices to communicate with each other through signaling with nearby base stations or cellular cells. When wireless communication devices move across service areas, handover occurs so that each wireless communication device maintains communication with each other via its corresponding cellular cell.

[0006] Another solution for wireless communication systems is a device-to-device (D2D) network, in which wireless communication devices can signal each other directly, rather than via an intermediate base station or cellular cell. D2D communication networks can utilize sidelink signaling to facilitate direct communication between wireless communication devices through a proximity service (ProSe) PC5 interface. In some D2D configurations, wireless communication devices can further communicate in a cellular system (usually under the control of a base station). Thus, the wireless communication devices can be configured for uplink and downlink signaling via a base station, and further for sidelink signaling directly between wireless communication devices without the need for transmission through a base station.

[0007] An example of a sidelink wireless communication system is a vehicle-to-everything (V2X) communication system. V2X communication involves the exchange of information not only between vehicles themselves, but also between vehicles and external systems such as street lights, buildings, pedestrians, and wireless communication networks. V2X systems enable vehicles to obtain information about weather, nearby accidents, road conditions, activities of nearby vehicles and pedestrians, objects near the vehicle, and other relevant information that can be used to improve the vehicle driving experience, increase vehicle safety, and support autonomous vehicles.

[0008] A brief overview of some examples

[0009] An overview of one or more aspects of the present disclosure is given below to provide a basic understanding of these aspects. This overview is not an exhaustive overview of all conceived features of the present disclosure, and is neither intended to identify the key or decisive elements of all aspects of the present disclosure, nor to attempt to define 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 form as a preface to a more detailed description given later.

[0010] In one example, a method for sidelink wireless communication at a first wireless communication device is disclosed. The method includes: communicating with a base station via a first link and communicating with a second wireless communication device via a second link on a common carrier shared between the first link and the second link; and receiving a grant from the base station, the grant including an indication of resources on the common carrier for superimposed transmission, the superimposed transmission including a base layer corresponding to an uplink signal to be transmitted to the base station and an enhancement layer corresponding to a sidelink signal to be transmitted to at least a second wireless communication device. The method further includes: transmitting interference assistance information associated with the base layer to the second wireless communication device; and transmitting the superimposed transmission including the base layer and the enhancement layer to the base station and the second wireless communication device.

[0011] Another example provides a method for sidelink wireless communication at a first wireless communication device. The method includes: communicating with a base station through a first link and communicating with a second wireless communication device through a second link on a common carrier shared between the first link and the second link; and receiving a superimposed transmission from the second wireless communication device, the superimposed transmission including a base layer corresponding to an uplink signal transmitted from the second wireless communication device to the base station and an enhancement layer corresponding to a sidelink signal transmitted from the second wireless communication device to the first wireless communication device. The method further includes: receiving interference assistance information associated with the base layer from the second wireless communication device; and using the interference assistance information to eliminate the base layer from the superimposed transmission to obtain the enhancement layer including the sidelink signal.

[0012] Another example provides a method for wireless communication at a base station. The method includes: communicating with a first wireless communication device through a first link on a common carrier shared between the first link and the second link, and the first wireless communication device further communicates with a second wireless communication device on the second link. The method further includes: transmitting a grant to the first wireless communication device, the grant including an indication of resources on the common carrier for superimposed transmission, the superimposed transmission including a base layer corresponding to an uplink signal to be transmitted from the first wireless communication device to the base station and an enhancement layer corresponding to a side link signal to be transmitted from the first wireless communication device to at least a second wireless communication device; and receiving the base layer of the superimposed transmission including the uplink signal from the first wireless communication device.

[0013] Another example provides a first wireless communication device in a wireless communication network. The first wireless communication device includes a wireless transceiver, a memory, and a processor coupled to the wireless transceiver and the memory. The processor and the memory can be configured to: communicate with a base station via a first link and communicate with a second wireless communication device via a second link on a common carrier shared between the first link and the second link via the wireless transceiver; and receive a grant from the base station, the grant including an indication of resources for superimposed transmission on the common carrier, the superimposed transmission including a base layer corresponding to an uplink signal to be transmitted to the base station and an enhancement layer corresponding to a side link signal to be transmitted to at least a second wireless communication device. The processor and the memory can be further configured to: transmit interference assistance information associated with the base layer to the second wireless communication device via the wireless transceiver; and transmit the superimposed transmission including the base layer and the enhancement layer to the base station and the second wireless communication device via the wireless transceiver.

[0014] Another example provides a first wireless communication device in a wireless communication network. The first wireless communication device includes: a device for communicating with a base station via a first link and communicating with a second wireless communication device via a second link on a common carrier shared between the first link and the second link; and a device for receiving a grant from the base station, the grant including an indication of resources on the common carrier for superimposed transmission, the superimposed transmission including a base layer corresponding to an uplink signal to be transmitted to the base station and an enhancement layer corresponding to a side link signal to be transmitted to at least a second wireless communication device. The first wireless communication device further includes: a device for transmitting interference assistance information associated with the base layer to the second wireless communication device; and a device for transmitting the superimposed transmission including the base layer and the enhancement layer to the base station and the second wireless communication device.

[0015] Another example provides a first wireless communication device in a wireless communication network. The first wireless communication device includes: a device for communicating with a base station through a first link and communicating with a second wireless communication device through a second link on a common carrier shared between the first link and the second link; and a device for receiving a superimposed transmission from the second wireless communication device, the superimposed transmission including a base layer corresponding to an uplink signal transmitted from the second wireless communication device to the base station and an enhancement layer corresponding to a side link signal transmitted from the second wireless communication device to the first wireless communication device; the first wireless communication device further includes: a device for receiving interference assistance information associated with the base layer from the second wireless communication device; and a device for using the interference assistance information to eliminate the base layer from the superimposed transmission to obtain the enhancement layer including the side link signal.

[0016] Another example provides a base station in a wireless communication network. The base station includes: a device for communicating with a first wireless communication device through a first link on a common carrier shared between the first link and the second link, and the first wireless communication device further communicates with a second wireless communication device on the second link. The base station further includes: a device for transmitting a grant to the first wireless communication device, the grant including an indication of resources on the common carrier for superimposed transmission, the superimposed transmission including a base layer corresponding to an uplink signal to be transmitted from the first wireless communication device to the base station and an enhancement layer corresponding to a side link signal to be transmitted from the first wireless communication device to at least a second wireless communication device; and a device for receiving the base layer of the superimposed transmission including the uplink signal from the first wireless communication device.

[0017] These and other aspects will be more fully understood after reading the following detailed description. After reading the following description of specific exemplary embodiments in conjunction with the accompanying drawings, other aspects, features and embodiments will become apparent to those of ordinary skill in the art. Although each feature may be discussed below with respect to certain embodiments and drawings, all embodiments may include one or more of the 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 discussed herein. In a similar manner, although exemplary embodiments may be discussed below as device, system or method embodiments, such exemplary embodiments may be implemented in various devices, systems, and methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a diagram illustrating an example of a wireless radio access network in accordance with some aspects.

[0020] Figure 2 is a diagram illustrating an example of a wireless communication network that employs sidelink communications in accordance with some aspects.

[0021] Figure 3 is a diagram illustrating an example of a frame structure for use in a wireless communication network in accordance with some aspects.

[0022] Figure 4 is a diagram illustrating an example of a wireless communication system for facilitating both cellular and sidelink communications in accordance with some aspects.

[0023] Figure 5 is a signaling diagram illustrating example signaling for superimposed transmission of sidelink and uplink according to some aspects.

[0024] Figure 6 is a diagram illustrating an example overlay transmission in accordance with some aspects.

[0025] Figure 7 is a signaling diagram illustrating other exemplary signaling for overlay transmission in accordance with some aspects.

[0026] Figure 8 is a signaling diagram illustrating other exemplary signaling for overlay transmission in accordance with some aspects.

[0027] Fig. 9 is a block diagram illustrating an example of a hardware implementation for a base station employing a processing system in accordance with some aspects.

[0028] Fig.10 is a block diagram illustrating an example of a hardware implementation for a wireless communication device employing a processing system in accordance with some aspects.

[0029] Fig.11 is a flow chart of an example method for a wireless communication device to generate and transmit a superimposed transmission of an uplink signal and a sidelink signal in accordance with some aspects.

[0030] Fig.12 is a flow chart of another example method for a wireless communication device to generate and transmit a superimposed transmission of an uplink signal and a sidelink signal in accordance with some aspects.

[0031] Fig.13 is a flow chart of another example method for a wireless communication device to generate and transmit a superimposed transmission of an uplink signal and a sidelink signal in accordance with some aspects.

[0032] Fig.14 is a flow chart of an example method for a wireless communication device to receive a superimposed transmission of an uplink signal and a sidelink signal in accordance with some aspects.

[0033] Fig.15 is a flow chart of an example method for a base station to receive an uplink signal comprising a superimposed transmission of an uplink signal and a sidelink signal according to some aspects.

[0034] Fig.16 is a flow chart of another example method for a base station to receive an uplink signal comprising a superimposed transmission of an uplink signal and a sidelink signal according to some aspects.

[0035] Fig.17 is a flow chart of another example method for a base station to receive an uplink signal comprising a superimposed transmission of an uplink signal and a sidelink signal according to some aspects.

[0036] Detailed Description

[0037] 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. This detailed description includes specific details to provide a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid diluting such concepts.

[0038] Although various aspects and embodiments are described in this application by explanation of 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 innovation described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, each embodiment and / or use can be generated via an integrated chip embodiment and other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / shopping equipment, medical equipment, AI-enabled devices, etc.). Although some examples may or may not be specifically for each use case or application, the wide applicability of the described innovation may occur. The scope of each implementation can range from chip-level or module components to non-module, non-chip-level implementations, and further to aggregated, distributed or OEM devices or systems incorporating one or more aspects of the described innovation. In some practical environments, the equipment incorporating the various aspects and features described may also necessarily include additional components and features for implementing and practicing the claimed and described embodiments. For example, the transmission and reception of wireless signals necessarily include several components for analog and digital purposes (e.g., hardware components, including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.). The innovations described herein are intended to be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc., of various sizes, shapes, and configurations.

[0039] Various aspects of the present disclosure relate to a mechanism for a wireless communication device to generate a superimposed transmission of a sidelink signal to be transmitted to at least one receiving wireless communication device and an uplink signal to be transmitted to a base station. The wireless communication device may transmit the superimposed transmission on a common carrier for both the sidelink transmission and the uplink transmission on resources allocated by the base station. The superimposed transmission includes a base layer corresponding to the uplink signal and an enhancement layer corresponding to the sidelink signal. The wireless communication device may further generate and transmit interference assistance information to the at least one receiving wireless communication device for use by the receiving wireless communication device in eliminating the base layer from the superimposed transmission.

[0040] In some examples, the base station may further determine a power splitting factor for the base layer and the enhancement layer, and transmit the power splitting factor to the wireless communication device. The wireless communication device may apply the power splitting factor to the total power budget of the wireless communication device to generate the base layer at a first power and the enhancement layer at a second power. In some examples, the base station may further determine a closed-loop power control parameter and an open-loop power control parameter for the wireless communication device, and transmit these closed-loop and open-loop power control parameters to the wireless communication device for use in determining the total power budget. In some examples, the base station may identify the power splitting factor based on the uplink quality (e.g., the path loss experienced by the wireless communication on the Uu (cellular) link between the base station and the wireless communication device) and the side link quality (e.g., the path loss experienced by the wireless communication device on the PC5 link). The wireless communication device may measure the side link path loss within a time window and provide the average side link path loss within the time window to the base station.

[0041] In some examples, the wireless communication device may receive a respective modulation and coding scheme (MCS) from a base station for use in generating each of an uplink signal and a sidelink signal. The wireless communication device may then include the MCS of the uplink signal and a power splitting factor in interference assistance information to a receiving wireless communication device to enable the receiving wireless communication device to cancel the uplink signal from the received superimposed transmission. In some examples, the interference assistance information may be transmitted within sidelink control information (SCI) or separately from the SCI.

[0042] In some examples, the wireless communication device may transmit a scheduling request requesting a grant of resources for superposition transmission on a common carrier. In other examples, the wireless communication device may transmit a scheduling request requesting a sidelink grant for a sidelink signal, and the base station may determine that an superposition grant for the sidelink signal and the uplink signal is to be provided (e.g., already configured or requested separately by the wireless communication device). For example, the wireless communication device may transmit a capability indication to the base station indicating the ability of the wireless communication device to perform superposition transmission, and the base station may provide a grant for superposition transmission based on the capability indication.

[0043] The various concepts presented throughout this disclosure may be implemented across a wide variety of telecommunication systems, network architectures, and communication standards. Figure 1, a schematic illustration of a radio access network 100 is provided as an illustrative example and not a limitation. The RAN 100 may implement any one or several suitable wireless communication technologies to provide radio access. As an example, the RAN 100 may operate in accordance with the Third Generation Partnership Project (3GPP) New Radio (NR) specifications, commonly referred to as 5G. As another example, the RAN 100 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.

[0044] The geographical area covered by the radio access network 100 may be divided into a number of cellular areas (cells) that may be uniquely identified by user equipment (UE) based on an identity broadcast over the geographical area from an access point or base station. Figure 1 Macro cells 102, 104, and 106, and small cells 108 are illustrated, each of which may include one or more sectors (not shown). A sector is a sub-area of ​​a cell. All sectors within one cell are served by the same base station. A radio link within a sector may be identified by a single logical identification 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 communication with UEs in a portion of the cell.

[0045] In general, the corresponding base station (BS) serves the respective cellular cells. In a broad sense, the base station is a network element in the radio access network responsible for radio transmission and reception to or from the UE in one or more cellular cells. BS may also be referred to 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 B node (NB), an evolved B node (eNB), a next generation B node (gNB), a transmission reception point (TRP), or some other suitable term by those skilled in the art. In some examples, the base station may include two or more TRPs that may be co-located or non-co-located. Each TRP may communicate on the same or different carrier frequencies in the same or different frequency bands.

[0046] exist Figure 1, two base stations 110 and 112 are shown in cells 102 and 104; and a third base station 114 is shown as controlling a remote radio head (RRH) 116 in cell 106. That is, the base station may have an integrated antenna, or may be connected to the antenna or RRH by a feeder cable. In the illustrated example, cells 102, 104, and 106 may be referred to as macro cells because base stations 110, 112, and 114 support cells with large sizes. In addition, base station 118 is shown in a small cell 108 (e.g., a micro cell, a pico cell, a femto cell, a home base station, a home node B, a home evolved node B, etc.), which may overlap with one or more macro cells. In this example, cell 108 may be referred to as a small cell because base station 118 supports cells with relatively small sizes. Cell size setting may be done according to system design and component constraints. It is to be understood that the radio access network 100 may include any number of wireless base stations and cellular cells. In addition, relay nodes may be deployed to extend the size or coverage area of ​​a given cellular cell. Base stations 110, 112, 114, 118 provide wireless access points to the core network for any number of mobile devices.

[0047] Figure 1 Further included is a quadcopter or drone 120 that can be configured to act as a base station. That is, in some examples, the cell may not necessarily be stationary, and the geographic area of ​​the cell may move depending on the location of a mobile base station (such as a quadcopter 120).

[0048] In general, a base station may include a backhaul interface for communicating with a backhaul portion of a network (not shown). The backhaul may provide a link between the base station and a core network (not shown), and in some examples, the backhaul may provide interconnection between respective base stations. The core network may be part of a wireless communication system and may be independent of the radio access technology used in the radio access network. Various types of backhaul interfaces may be employed, such as a direct physical connection using any suitable transport network, a virtual network, and the like.

[0049] RAN 100 is illustrated as supporting wireless communications for multiple mobile devices. Mobile devices are generally referred to as user equipment (UE) in standards and specifications promulgated by the Third Generation Partnership Project (3GPP), but may also be referred to as mobile stations (MS), subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals (AT), mobile terminals, wireless terminals, remote terminals, handsets, terminals, user agents, mobile clients, clients, or some other suitable terminology by those skilled in the art. UE may be a device that provides access to network services to a user.

[0050] In this document, a "mobile" device does not necessarily need to have mobile capabilities and can be stationary. The term mobile device or mobile device refers to a wide variety of devices and technologies. For example, some non-limiting examples of mobile devices include mobile devices, cellular (cell) phones, smart phones, session initiation protocol (SIP) phones, laptops, personal computers (PCs), notebooks, netbooks, smartbooks, tablet devices, personal digital assistants (PDAs), and a wide variety of embedded systems, for example, corresponding to the "Internet of Things" (IoT). Additionally, the mobile device can 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-axis aircraft, 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 (e.g., an MP3 player), a camera, a game console, etc. Additionally, the mobile device may be a digital home or smart home device, such as home audio, video and / or multimedia devices, appliances, vending machines, smart lighting devices, home security systems, smart meters, etc. The mobile device may further be a smart energy device, a security device, a solar panel or solar array, a municipal infrastructure device that controls power, lighting, water, etc. (e.g., a smart grid), an industrial automation and enterprise device, a logistics controller, agricultural equipment, etc. Still further, the mobile device may provide networked medical or telemedicine support, i.e., health care at a distance. Telehealth devices may include telehealth monitoring devices and telehealth supervision devices, whose communications may be given priority treatment or prioritized access over other types of information, for example, in the form of prioritized access for critical service data transmission and / or associated QoS for critical service data transmission.

[0051] Within the RAN 100, the cells may include UEs that may be in communication with one or more sectors of each cell. For example, UEs 122 and 124 may be in communication with base station 110; UEs 126 and 128 may be in communication with base station 112; UEs 130 and 132 may be in communication with base station 116 via RRH 114; UE 134 may be in communication with base station 118; and UE 136 may be in communication with mobile base station 120. Here, each base station 110, 112, 114, 118, and 120 may be configured to provide an access point to a core network (not shown) for all UEs in the corresponding cell. In another example, a mobile network node (e.g., quadcopter 120) may be configured to act as a UE. For example, quadcopter 120 may operate within cell 102 by communicating with base station 110.

[0052] Wireless communication between RAN 100 and a UE (e.g., UE 122 or 124) may be described as utilizing an air interface. Transmissions over the air interface from a base station (e.g., base station 110) to one or more UEs (e.g., UEs 122 and 124) 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 at a scheduling entity (further described below; e.g., base station 110). Another way to describe this scheme may be to use the term broadcast channel multiplexing. Transmissions from a UE (e.g., UE 122) to a base station (e.g., base station 110) may be referred to as uplink (UL) transmissions. According to further aspects of the present disclosure, the term uplink may refer to point-to-point transmissions originating at a scheduled entity (further described below; e.g., UE 122).

[0053] For example, DL transmissions may include unicast or broadcast transmissions of control information and / or traffic information (e.g., user data traffic) from a base station (e.g., base station 110) to one or more UEs (e.g., UEs 122 and 124), while UL transmissions may include transmissions of control information and / or traffic information originated at a UE (e.g., UE 122). In addition, uplink and / or downlink control information and / or traffic information may be divided into frames, subframes, time slots, and / or symbols in time. As used herein, a symbol may refer to a time unit in an orthogonal frequency division multiplexing (OFDM) waveform in which each subcarrier carries one resource element (RE). A time slot may carry 7 or 14 OFDM symbols. A subframe may refer to a duration of 1 ms. Multiple subframes or time slots may be grouped together to form a single frame or radio frame. Of course, these definitions are not required, and any suitable scheme may be used to organize the waveform, and the various time divisions of the waveform may have any suitable duration.

[0054] In order to obtain a low block error rate (BLER) for transmission over the air interface while still achieving very high data rates, channel coding can be used. That is, wireless communications generally utilize suitable error-correcting block codes. In a typical block code, an information message or sequence is split into code blocks (CBs), and an encoder (e.g., CODEC) at the transmitting device then mathematically adds redundancy to the information message. Utilizing this redundancy in the encoded information message can improve the reliability of the message, thereby enabling correction of any bit errors that may occur due to noise.

[0055] In the 5G NR specification, user data is encoded using quasi-cyclic low-density parity check (LDPC) with two different basemaps: one basemap is used for large code blocks and / or high code rates, and the other basemap is used for other cases. Control information and the physical broadcast channel (PBCH) are encoded using polar coding based on nested sequences. For these channels, puncturing, shortening, and repetition are used for rate matching.

[0056] However, it will be appreciated by those skilled in the art that various aspects of the present disclosure may be implemented using any suitable channel code. Various implementations of base stations and UEs may include suitable hardware and capabilities (e.g., encoders, decoders, and / or CODECs) to utilize one or more of these channel codes for wireless communication.

[0057] The air interface in the RAN 100 may utilize one or more multiplexing and multiple access algorithms to enable simultaneous communication of various devices. For example, the 5G NR specification provides multiple access for UL or reverse link transmissions from UEs 122 and 124 to base station 110, and utilizes orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) to provide multiplexing for DL ​​or forward link transmissions from base station 110 to UEs 122 and 124. In addition, for UL transmissions, the 5G NR specification provides support for discrete Fourier transform spread OFDM (DFT-s-OFDM) with CP (also known as single carrier FDMA (SC-FDMA)). However, within the scope of the present disclosure, multiplexing and multiple access are not limited to the above schemes, and may be provided using time division multiple access (TDMA), code division multiple access (CDMA), frequency division multiple access (FDMA), sparse code multiple access (SCMA), resource extension multiple access (RSMA), or other appropriate multiple access schemes. In addition, multiplexing of DL transmissions from base station 110 to UEs 122 and 124 may be provided using time division multiplexing (TDM), code division multiplexing (CDM), frequency division multiplexing (FDM), orthogonal frequency division multiplexing (OFDM), sparse code multiplexing (SCM), or other suitable multiplexing schemes.

[0058] In addition, the air interface in the RAN 100 may utilize one or more duplex algorithms. Duplex refers to a point-to-point communication link in which both endpoints can communicate with each other in two directions. Full-duplex means that both endpoints can communicate with each other at the same time. Half-duplex means that only one endpoint can send information to the other endpoint at a time. Time division duplex (TDD) is usually used to implement half-duplex simulation for wireless links. In TDD, transmissions in different directions on a given channel are separated from each other using time division multiplexing. That is, at some times, the channel is dedicated to transmission in one direction, and at other times, the channel is dedicated to transmission in the other direction, where the direction can change very quickly, for example, several times per time slot. In wireless links, full-duplex channels generally rely on physical isolation of transmitters and receivers, and suitable interference cancellation techniques. Full-duplex simulation is usually implemented for wireless links by utilizing frequency division duplex (FDD) or space division duplex (SDD). In FDD, transmissions in different directions can operate at different carrier frequencies (e.g., within a paired spectrum). In SDD, transmissions in different directions on a given channel are separated from each other using spatial division multiplexing (SDM). In other examples, full-duplex communication may be implemented within an unpaired spectrum (e.g., within a single carrier bandwidth), where transmissions in different directions occur within different sub-bands of the carrier bandwidth. This type of full-duplex communication may be referred to herein as sub-band full-duplex (SBFD), also known as flexible duplex.

[0059] In the RAN 100, the ability of a UE to communicate independently of its location while moving is referred to as mobility. The various physical channels between the UE and the RAN are generally established, maintained, and released under the control of an access and mobility management function (AMF), which may include a security context management function (SCMF) that manages security contexts for both control plane and user plane functionality and a security anchor function (SEAF) that performs authentication. In various aspects of the present disclosure, the RAN 100 may utilize DL-based mobility or UL-based mobility to achieve mobility and switching (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 may monitor various parameters of signals from its serving cell and various parameters of neighboring cells. Depending on the quality of these parameters, the UE may maintain communication with one or more neighboring cells. During this time, if the UE moves from one cell to another, or if the signal quality from the neighboring cell exceeds the signal quality from the serving cell for a given amount of time, the UE may undergo a handover or handover from the serving cell to the neighboring (target) cell. For example, a UE 124 may move from a geographic area corresponding to its serving cell 102 to a geographic area corresponding to a neighboring cell 106. When the signal strength or quality from a neighboring cell 106 exceeds the signal strength or quality of its serving cell 102 for a given amount of time, the UE 124 may transmit a report message to its serving base station 110 indicating this condition. In response, the UE 124 may receive a handover command, and the UE may undergo a handover to the cell 106.

[0060] In a network configured for UL-based mobility, the UL reference signal from each UE may be used by the network to select a serving cell for each UE. In some examples, base stations 110, 112, and 114 / 116 may broadcast unified synchronization signals (e.g., a unified primary synchronization signal (PSS), a unified secondary synchronization signal (SSS), and a unified physical broadcast channel (PBCH)). UEs 122, 124, 126, 128, 130, and 132 may receive the unified synchronization signals, derive carrier frequency and radio frame timing from these synchronization signals, and transmit uplink pilots or reference signals in response to the derived timing. The uplink pilot signal transmitted by a UE (e.g., UE 124) may be received concurrently by two or more cells (e.g., base stations 110 and 114 / 116) within RAN 100. Each of these cells may measure the strength of the pilot signal, and the RAN (e.g., one or more of base stations 110 and 114 / 116 and / or a central node within the core network) may determine a serving cell for UE 124. As UE 124 moves within RAN 100, the network may continue to monitor the uplink pilot signals transmitted by UE 124. When the signal strength or quality of the pilot signal measured by a neighboring cell exceeds the signal strength or quality measured by the serving cell, RAN 100 may handover UE 124 from the serving cell to the neighboring cell with or without notifying UE 124.

[0061] Although the synchronization signal transmitted by base stations 110, 112 and 114 / 116 may be uniform, the synchronization signal may not identify a specific cell, but may identify a zone including multiple cells operating on the same frequency and / or having the same timing. The use of zones in a 5G network or other next generation communication network implements 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.

[0062] In various implementations, the air interface in the RAN 100 may utilize a licensed spectrum, an unlicensed spectrum, or a shared spectrum. A licensed spectrum generally provides exclusive use of a portion of the spectrum by a mobile network operator purchasing a license from a government regulator. An unlicensed spectrum provides shared use of a portion of the spectrum without the need for a government-granted license. Although some technical rules generally still need to be followed to access the unlicensed spectrum, any operator or device can obtain access. Shared spectrum may fall between licensed 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, a license holder of a portion of a licensed spectrum may provide licensed shared access (LSA) to share the spectrum with other parties, for example, using conditions determined by the appropriate license holder to obtain access.

[0063] In some examples, access to the air interface may be scheduled, where a scheduling entity (e.g., a base station) allocates resources (e.g., time-frequency resources) for communication among some or all devices and equipment within its service area or cell. Within the present disclosure, as discussed further below, a scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more scheduled entities. That is, for scheduled communications, a UE or scheduled entity utilizes resources allocated by the scheduling entity.

[0064] The base station is not the only entity that can be used as a scheduling entity. That is, in some examples, a UE can be used as a scheduling entity, thereby scheduling resources for one or more scheduled entities (e.g., one or more other UEs). For example, two or more UEs (e.g., UEs 138, 140, and 142) can communicate with each other using peer-to-peer (P2P) or sidelink signals 137 without relaying the communication through a base station. In some examples, UEs 138, 140, and 142 can each act as a scheduling entity or a transmitter sidelink device and / or a scheduled entity or a receiver sidelink device to schedule resources and communicate sidelink signals 137 between them without relying on scheduling or control information from a base station. In other examples, two or more UEs (e.g., UEs 126 and 128) within the coverage area of ​​a base station (e.g., base station 112) can also communicate sidelink signals 127 on a direct link (sidelink) without communicating the communication through base station 112. In this example, base station 112 can allocate resources to UEs 126 and 128 for sidelink communication. In either case, such sidelink signaling 127 and 137 may be implemented in a P2P network, a device-to-device (D2D) network, a vehicle-to-vehicle (V2V) network, a vehicle-to-everything (V2X) network, a mesh network, or other suitable direct link network.

[0065] Two main technologies that can be used by V2X networks 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. Various aspects of the present disclosure may relate to New Radio (NR) cellular V2X networks, which for simplicity are referred to herein as V2X networks. However, it should be understood that the concepts disclosed herein may not be limited to a particular V2X standard or may refer to sidelink networks other than V2X networks.

[0066] Figure 2 An example of a wireless communication network 200 configured to support D2D or sidelink communication is illustrated. In some examples, the sidelink communication may include V2X communication. V2X communication involves not only the direct wireless information exchange between the vehicles (e.g., vehicles 202 and 204) themselves, but also the direct wireless information exchange between the vehicles 202 / 204 and infrastructure (e.g., roadside units (RSUs) 206) (such as street lights, buildings, traffic cameras, toll booths or other stationary objects), vehicles 202 / 204 and pedestrians 208, and vehicles 202 / 204 and wireless communication networks (e.g., base stations 210). In some examples, V2X communication can be implemented according to the new radio (NR) cellular V2X standard defined by 3GPP (Release 16) or other suitable standards.

[0067] V2X communication enables vehicles 202 and 204 to obtain information about weather, nearby accidents, road conditions, activities of nearby vehicles and pedestrians, objects near the vehicle, and other relevant information that can be used to improve the vehicle driving experience and improve vehicle safety. For example, such V2X data can enable autonomous driving and improve road safety and traffic efficiency. For example, V2X-connected vehicles 202 and 204 can use the exchanged V2X data to provide vehicle collision warnings, road hazard warnings, approaching emergency vehicle warnings, pre-impact / post-impact warnings and information, emergency braking warnings, forward traffic jam warnings, lane change warnings, smart navigation services, and other similar information. In addition, the V2X data received by the V2X-connected mobile device of the pedestrian / cyclist 208 can be used to trigger warning sounds, vibrations, flashing lights, etc. in situations where danger is about to occur.

[0068] Sidelink communications between vehicle UEs (V-UEs) 202 and 204, or between V-UEs 202 or 204 and RSUs 206 or pedestrian UEs (P-UEs) 208, may occur over the sidelink 212 using a Proximity Services (ProSe) PC5 interface. In various aspects of the present disclosure, the PC5 interface may be further utilized to support D2D sidelink 212 communications in other proximity use cases. Examples of other proximity use cases may include public safety or business-based (e.g., entertainment, education, office, medical, and / or interactive) proximity services. Figure 2 In the example shown in , ProSe communication may further occur between UEs 214 and 216 .

[0069] ProSe communication may support different operation scenarios, such as in-coverage, out-of-coverage, and partial coverage. Out-of-coverage refers to a scenario where UEs (e.g., V-UEs 202 and 204 and P-UE 208) are outside the coverage area of ​​a base station (e.g., base station 210), but each UE is still configured for ProSe communication. Partial coverage refers to a scenario where some UEs (e.g., V-UE 204) are outside the coverage area of ​​base station 210, while other UEs (e.g., V-UE 202 and P-UE 208) are in communication with base station 210. In-coverage refers to a scenario where UEs (e.g., UEs 214 and 216) are in communication with base station 210 (e.g., gNB) via a Uu (e.g., cellular interface) connection to receive ProSe service authorization and provisioning information to support ProSe operation.

[0070] To facilitate D2D sidelink communication on sidelink 212, for example, between UE 214 and 216, UE 214 and 216 may transmit discovery signals between them. In some examples, each discovery signal may include a synchronization signal, such as a primary synchronization signal (PSS) and / or a secondary synchronization signal (SSS), which facilitates device discovery and achieves communication synchronization on sidelink 212. For example, the discovery signal may be used by UE 216 to measure the signal strength and channel state of a potential sidelink (e.g., sidelink 212) with another UE (e.g., UE 214). UE 216 may use these measurements to select a UE (e.g., UE 214) for sidelink communication or relay communication.

[0071] In a 5G NR sidelink, sidelink communications may utilize a transmit or receive resource pool. For example, the minimum resource allocation unit in frequency may be a subchannel (e.g., which may include, for example, 10, 15, 20, 25, 50, 75, or 100 consecutive resource blocks), and the minimum resource allocation unit in time may be a time slot. The radio resource control (RRC) configuration of the resource pool may be pre-configured (e.g., a factory setting on the UE, such as determined by a sidelink standard or specification) or configured by a base station (e.g., base station 210).

[0072] In addition, sidelink (e.g., PC5) communications may have two main resource allocation operation modes. In the first mode, Mode 1, the base station (e.g., gNB) 210 may allocate resources to sidelink devices (e.g., V2X devices or other sidelink devices) for sidelink communications between sidelink devices in various ways. For example, the base station 210 may dynamically allocate sidelink resources (e.g., dynamic grants) to the sidelink devices in response to sidelink resource requests from the sidelink devices. The base station 210 may further activate preconfigured sidelink grants (e.g., configured grants) for sidelink communications between sidelink devices. In Mode 1, the transmitting sidelink device may report sidelink feedback to the base station 210.

[0073] In the second mode, Mode 2, the sidelink devices may autonomously select sidelink resources for sidelink communications between them. In some examples, the transmitting sidelink device may perform resource / channel sensing to select unoccupied resources (e.g., subchannels) on the sidelink channel. The signaling on the sidelink 212 is the same between the two modes. Therefore, from the perspective of the receiver, there is no difference between these modes.

[0074] Will refer to Figure 3 Various aspects of the present disclosure are described using OFDM waveforms schematically illustrated in FIG. It will be appreciated by those skilled in the art that various aspects of the present disclosure may be applied to SC-FDMA waveforms in substantially the same manner as described below. That is, while some examples of the present disclosure may focus on OFDM links for clarity, it will be appreciated that the same principles may also be applied to SC-FDMA waveforms.

[0075] Now refer to Figure 3 , illustrates an expanded view of an exemplary subframe 302 showing an OFDM resource grid. 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 in the horizontal direction in units of OFDM symbols; and frequency is in the vertical direction in units of subcarriers of a carrier.

[0076] Resource grid 304 can be used to schematically represent the time-frequency resources for a given antenna port. That is, in a multiple-input multiple-output (MIMO) implementation with multiple antenna ports available, there may be a corresponding multiple number of resource grids 304 available 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 particular implementation, each RE may represent one or more information bits. In some examples, a block of REs may 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 include 12 subcarriers, which number is independent of the parameter design used. In some examples, depending on the parameter design, an RB may include any suitable number of consecutive OFDM symbols in the time domain. Within the present disclosure, it is assumed that a single RB (such as RB 308) corresponds entirely to a single communication direction (transmission or reception for a given device).

[0077] Scheduling of a UE or sidelink device (hereinafter collectively referred to as a UE) for downlink, uplink, or sidelink transmissions typically involves scheduling one or more resource elements 306 within one or more subbands. Thus, the UE typically utilizes only a subset of the resource grid 304. In some examples, an RB may be the smallest resource unit 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. The RBs may be scheduled by a base station (e.g., gNB, eNB, etc.) or may be self-scheduled by the UE / sidelink device implementing the D2D sidelink communication.

[0078] In this illustration, RB 308 is shown as occupying less than the entire bandwidth of subframe 302, with some subcarriers illustrated 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, RB 308 is shown as occupying less than the entire duration of subframe 302, but this is merely one possible example.

[0079] Each 1 ms subframe 302 may include one or more adjacent time slots. Figure 3In the example shown in , a subframe 302 includes four time slots 310. In some examples, a time slot may 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 (sometimes referred to as shortened transmission time intervals (TTIs)) with shorter durations (e.g., one to three OFDM symbols). In some cases, these mini-slots or shortened transmission time intervals (TTIs) may occupy resources scheduled for ongoing time slot transmissions for the same or different UEs to transmit. Any number of resource blocks may be utilized within a subframe or time slot.

[0080] The expanded view of one time slot 310 illustrates the time slot 310 including a control region 312 and a data region 314. Generally speaking, the control region 312 may carry control channels, while the data region 314 may carry data channels. Of course, a time slot may contain full DL, full UL, or at least one DL portion and at least one UL portion. Figure 3 The simple structure illustrated in is merely exemplary in nature and different slot structures may be utilized and may include one or more of each of the control region and the data region.

[0081] Although not in Figure 3 308, but each RE 306 within an RB 308 may be scheduled to carry one or more physical channels, including a control channel, a shared channel, a data channel, etc. Other REs 306 within an RB 308 may also carry pilot or reference signals. These pilot or reference signals may be used by a receiving device to perform channel estimation on the corresponding channel, which may enable coherent demodulation / detection of the control and / or data channels within the RB 308.

[0082] In some examples, time slot 310 may be used for broadcast, multicast, groupcast, or unicast communications. For example, broadcast, multicast, or groupcast communications may refer to point-to-multipoint transmissions from one device (e.g., a base station, UE, or other similar device) to other devices. Here, broadcast communications are delivered to all devices, while multicast or groupcast communications are delivered to multiple target recipient devices. Unicast communications may refer to point-to-point transmissions from one device to a single other device.

[0083] In an example of cellular communication on a cellular carrier via a Uu interface, for DL ​​transmission, a scheduling entity (e.g., a base station) may allocate one or more REs 306 (e.g., within a control region 312) to carry DL control information including one or more DL control channels (such as a physical downlink control channel (PDCCH)) to one or more scheduled entities (e.g., UEs). The PDCCH carries downlink control information (DCI), including, but not limited to, power control commands (e.g., one or more open-loop power control parameters and / or one or more closed-loop power control parameters) for DL ​​and UL transmissions, scheduling information, grants, and / or RE assignments. The PDCCH may further carry HARQ feedback transmissions, such as an acknowledgment (ACK) or a negative acknowledgment (NACK). HARQ is a well-known technique to those of ordinary skill in the art, wherein for accuracy, the integrity of packet transmissions may be checked at the receiving side, for example, using any suitable integrity check mechanism (such as a checksum or a cyclic redundancy check (CRC)). If the integrity of the transmission is confirmed, an ACK may be transmitted, and if it is not confirmed, a NACK may be transmitted. In response to the NACK, the transmitting device may send a HARQ retransmission, which may enable chase combining, incremental redundancy, and the like.

[0084] The base station may further allocate one or more REs 306 (e.g., in the control region 312 or the data region 314) to carry other DL signals, such as a demodulation reference signal (DMRS); a phase tracking reference signal (PT-RS); a channel state information (CSI) reference signal (CSI-RS); and a synchronization signal block (SSB). The SSB may be broadcast at regular intervals based on a periodicity (e.g., 5, 10, 20, 30, 80, or 130 milliseconds). The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast control channel (PBCH). The UE may utilize the PSS and SSS to achieve radio frame, subframe, time slot, and symbol synchronization in the time domain, identify the center of the channel (system) bandwidth in the frequency domain, and identify the physical cell identity (PCI) of the cell.

[0085] The PBCH in the SSB may further include: a master information block (MIB), which includes various system information and parameters for decoding a system information block (SIB). The SIB may be, for example, a system information type 1 (SystemInformationType1) (SIB1), which may include various additional system information. Examples of system information transmitted in the MIB may include, but are not limited to, subcarrier spacing, system frame number, configuration of a PDCCH control resource set (CORESET) (e.g., PDCCH CORESET0), and a search space for SIB1. Examples of additional system information transmitted in SIB1 may include, but are not limited to, random access search space, downlink configuration information, and uplink configuration information. The MIB and SIB1 together provide minimum system information (SI) for initial access.

[0086] In UL transmission, the scheduled entity (e.g., UE) may utilize one or more REs 306 to carry UL control information (UCI) to the scheduling entity, which includes one or more UL control channels, such as a physical uplink control channel (PUCCH). UCI may include various packet types and categories, including pilots, reference signals, and information configured to implement or assist in decoding uplink data transmission. Examples of uplink reference signals may include sounding reference signals (SRS) and uplink DMRS. In some examples, UCI may include a scheduling request (SR), i.e., a request for the scheduling entity to schedule uplink transmission. Here, in response to the SR transmitted on the UCI, the scheduling entity may transmit downlink control information (DCI), which may schedule resources for uplink packet transmission. UCI may also include HARQ feedback, channel state feedback (CSF) (such as CSI report), or any other suitable UCI.

[0087] In addition to control information, one or more REs 306 (e.g., within the data region 314) may also be allocated for data traffic. Such data traffic may be carried on one or more traffic channels, such as a physical downlink shared channel (PDSCH) for DL ​​transmissions or a physical uplink shared channel (PUSCH) for UL transmissions. In some examples, one or more REs 306 within the data region 314 may be configured to carry other signals, such as one or more SIBs and DMRS.

[0088] In an example of sidelink communication on a sidelink carrier via a PC5 interface, a control region 312 of a time slot 310 may include a physical sidelink control channel (PSCCH) including sidelink control information (SCI) transmitted by an initiator (transmitter) sidelink device (e.g., a Tx V2X or other Tx UE) to a set of one or more other receiver sidelink devices (e.g., an Rx V2X device or other Rx UE). A data region 314 of the time slot 310 may include a physical sidelink shared channel (PSSCH) including sidelink data traffic transmitted by a transmitter sidelink device within resources reserved by the initiator (transmitter) sidelink device on the sidelink carrier via the SCI. Other information may be further transmitted on each RE 310 within the time slot 306. For example, HARQ feedback information may be transmitted from a receiver sidelink device to a transmitter sidelink device in a physical sidelink feedback channel (PSFCH) within the time slot 310.

[0089] These physical channels are generally multiplexed and mapped to transport channels for handling by the medium access control (MAC) layer. The transport channels carry information blocks, which are called transport blocks (TBs). The transport block size (TBS), which may correspond to the number of information bits, may be a controlled parameter based on the modulation and coding scheme (MCS) and the number of RBs in a given transmission.

[0090] Figure 3 The channels or carriers illustrated in are not necessarily all channels or carriers that may be utilized between devices, and one of ordinary skill in the art will recognize that other channels or carriers may be utilized in addition to those illustrated, such as other traffic, control, and feedback channels.

[0091] Figure 4 is a diagram illustrating an example of a wireless communication system 400 for facilitating both cellular communication and sidelink communication. The wireless communication system 400 includes multiple wireless communication devices 402a, 402b, and 402c and a base station (e.g., eNB or gNB) 406. In some examples, the wireless communication devices 402a, 402b, and 402c may be UEs capable of sidelink communication (e.g., D2D or V2X).

[0092] Wireless communication devices 402a and 402b may communicate on a first side link 404a, while wireless communication devices 402a and 402c may communicate on a second side link 404b. Each of the side links 404a and 404b may utilize, for example, a PC5 interface. Wireless communication devices 402a, 402b, and 402c may further communicate with a base station 406 on corresponding Uu links 408a, 408b, and 408c. Side link communications on side links 404a and 404b may be carried in a licensed frequency domain, for example, using radio resources operating according to 5G NR or NR side link (SL) specifications and / or carried in an unlicensed frequency domain using radio resources operating according to 5G unlicensed new radio (NR-U) specifications.

[0093] In some examples, a common carrier may be shared between the sidelinks 404a and 404b and the Uu links 408a-408c so that resources on the common carrier may be allocated for both sidelink communications between the wireless communication devices 402a-402c and cellular communications (e.g., uplink and downlink communications) between the wireless communication devices 402a-402c and the base station 406. For example, the wireless communication system 400 may be configured to support a mode 1 sidelink network, where resources for both sidelink communications and cellular communications are scheduled by the base station 406. In other examples of implementing a mode 2 sidelink on the sidelinks 404a and 404b, the wireless communication devices 402a-402c may autonomously select (e.g., from one or more frequency bands or subbands designated for sidelink communications) sidelink resources for communication therebetween. In this example, the wireless communication devices 402a-402c may act as both a scheduling entity and a scheduled entity that schedules sidelink resources for communication with each other.

[0094] In some examples, there may be a mismatch between the signal-to-noise ratio (SNR) experienced on a sidelink (e.g., sidelinks 404a and 404b of the wireless communication device 402a) and the SNR experienced on an uplink (e.g., Uu interface 408a) between the wireless communication device 402a and the base station 406. For example, the SNR on the sidelink may be much higher than the SNR on the uplink due to the close proximity of the wireless communication devices 402a-402c compared to the larger distance between the wireless communication device 402a and the base station 406.

[0095] In various aspects of the present disclosure, by using the same resources for concurrent uplink and sidelink communications, SNR mismatch can be used to obtain higher throughput. For example, the wireless communication device 402a may be configured to generate a superposition transmission of a sidelink signal and an uplink signal. The superposition transmission may include a base layer corresponding to a weaker uplink signal and an enhancement layer corresponding to a stronger sidelink signal. The base layer may be transmitted at a higher power than the enhancement layer so that the base layer can be received by the base layer, while further allowing one or more receiving side link wireless communication devices (e.g., wireless communication devices 420b and 402c) to receive a superposition transmission including both the base layer and the enhancement layer. In some examples, interference elimination of the base layer may be performed by the receiving wireless communication devices 420b and 402c to obtain the enhancement layer. For example, the transmitting wireless communication device 402a may transmit interference assistance information related to the base layer to the receiving wireless communication devices 402b and 402c for use when eliminating the base layer from the received superposition transmission.

[0096] Figure 5 is a signaling diagram illustrating exemplary signaling for superimposed transmission of a sidelink and an uplink within a wireless communication network according to some aspects. The wireless communication network may correspond to, for example, Figure 1 , 2 4. The wireless communication network may include two or more wireless communication devices (WCDs) 502a and 502b and a base station 504. Each WCD 502a and 502b may correspond to, for example, Figure 1 , 2 and / or UE, D2D device or V2X device shown in 4. Base station 504 may correspond to, for example, Figure 1 , 2 and / or the gNB or eNB illustrated in any one or more of 4.

[0097] At 506, the first WCD 502a (e.g., WCD1) may generate and transmit a request for resources for transmission of a sidelink signal to the base station 504 via a Uu cellular link (e.g., a Uu interface). In some examples, the request may include a scheduling request. For example, the scheduling request may include one or more of the following: a sidelink packet priority of the sidelink signal, a sidelink buffer status report, or a sidelink quality (e.g., a sidelink path loss measured by WCD1 502a on one or more sidelinks (e.g., a PC5 interface)). In some examples, the scheduling request may include a request for resources for superimposed transmission of the sidelink signal and the uplink signal. In this example, the scheduling request may further include one or more of the following: an uplink packet priority of the uplink signal, an uplink buffer status report, an uplink quality (e.g., an uplink path loss measured by WCD1 502a on the Uu interface), and / or other parameters related to the uplink signal. In other examples, the uplink quality may be provided to the base station 504 separately from the scheduling request. The uplink path loss may correspond to the path loss measured, for example, by WCD1 502a on the downlink. In some examples, the scheduling request may include separate scheduling requests for the sidelink signal and the uplink signal. In this example, these separate scheduling requests may be transmitted in the same time slot (e.g., in different UCIs of the PUCCH) or in different time slots.

[0098] At 508, the base station 504 may determine, based on the received scheduling request(s), resources to be allocated for superimposed transmission of the sidelink signal and the uplink signal by WCD1 502a. In some examples, the base station 504 may determine to allocate superimposed resources based on separate scheduling requests that each request resources for one of the sidelink signal and the uplink signal. In other examples, the base station 504 may determine to allocate superimposed resources based on a scheduling request for superimposed resources (e.g., a scheduling request request for resources for superimposed transmission of the sidelink signal and the uplink signal). In other examples, the base station 504 may determine to allocate superimposed resources based on the sidelink scheduling request and previously configured uplink resources (e.g., semi-persistently scheduled (SPS) resources or other periodic uplink resources).

[0099] At 510, base station 504 may allocate resources on a common carrier shared between sidelink communications (e.g., communications via a sidelink (e.g., PC5 interface)) and uplink communications (e.g., communications via a Uu interface) for superposition transmission. For example, base station 504 may allocate one or more PRBs or REs within a time slot (or multiple time slots) of the common carrier for superposition transmission. Base station 504 may further determine respective MCSs for WCD1 502a to use for sidelink signals and uplink signals. For example, base station 504 may determine a first MCS for uplink signals and a second MCS for sidelink signals. The first and second MCSs may be the same or different.

[0100] In addition, the base station 504 may determine a power splitting factor (PSF) to be used by WCD1 502a when dividing the total power budget of WCD1 502a between a first power of a superimposed transmitted base layer corresponding to an uplink signal and a second power of a superimposed transmitted enhancement layer corresponding to a sidelink signal. For example, based on the sidelink quality (e.g., sidelink path loss) and the uplink quality (e.g., uplink path loss) provided by WCD1 502a, the base station 504 may determine a first minimum power of the uplink signal at which the uplink signal can be decoded by the base station 504 and a second minimum power of the sidelink signal at which the sidelink signal can be decoded by a second (receiving) WCD 502b (e.g., WCD2). The base station 504 may then identify the power splitting factor based on the first minimum power and the second minimum power. For example, the base station may select the power splitting factor to ensure that the transmit power of the base layer including the uplink signal is greater than or equal to the first minimum power and the transmit power of the enhancement layer including the sidelink signal is greater than or equal to the second minimum power.

[0101] At 512, base station 504 may transmit a grant of resources allocated for overlay transmission to WCD1 502a. In some examples, the grant may be included in downlink control information (DCI) of a physical downlink control channel (PDCCH). The DCI may further include a respective MCS selected for each of the uplink signal and the sidelink signal. Additionally, the DCI may include a PSF.

[0102] At 514, WCD1 502a may generate an overlay transmission including a base layer corresponding to the uplink signal and an enhancement layer corresponding to the sidelink signal and transmit the overlay transmission to base station 504 and at least WCD2 502b. In some examples, the sidelink signal includes a broadcast or multicast signal that may be transmitted to and / or received by two or more recipient WADs. In some examples, WCD1 502a may determine a total power budget for WCD1 502a for the overlay transmission and apply a PSF to the total power budget to generate the base layer at a first power and the enhancement layer at a second power. For example, WCD1 502a may set the first power P to the base layer. UL Determined as:

[0103] P UL =βP B , (Formula 1),

[0104] where β is the PSF and P B is the total power budget, and (0≤β≤1). In addition, WCD1502a may set the second power P SL Determined as:

[0105] P BL =(1-β)P B . (Formula 2)

[0106] In some examples, the total power budget may be determined based on open-loop power control parameters and closed-loop power control parameters provided by the base station 504 via a transmit power control (TPC) command sent from the base station 504 to WCD1 502a. The open-loop power control parameters may determine, for example, an initial power setting for WCD1 502a based on path loss and channel configuration, while the closed-loop power control parameters may provide corrections to these initial settings. In some examples, the base station 504 may update one or more of these open-loop parameters for superposition transmissions. For example, the base station 504 may increase the path loss compensation factor (α) of the open-loop power control parameters to allow WCD1 502a to compensate more for uplink path loss. As another example, the base station 504 may modify a cell-specific (or WCD-specific) parameter (P o ).

[0107] After determining a first power for the uplink signal and a second power for the sidelink signal based on the PSF, WCD1 502a may generate an uplink signal at a first power using a first MCS (selected by base station 504 for the uplink signal) to produce a base layer. Additionally, WCD1 502a may generate a sidelink signal at a second power using a second MCS (selected by base station 504 for the sidelink signal) to produce an enhancement layer. WCD1 502a may then overlay the enhancement layer on the base layer to produce an overlay transmission.

[0108] At 516, base station 504 may receive and decode the base layer including the uplink signal. Based on the PSF, WCD1 502a may not transmit the enhancement layer at a power high enough for base station 504 to receive the enhancement layer. Thus, base station 504 may perform normal decoding of the uplink signal.

[0109] At 518, WCD1 502a may further generate interference assistance information and transmit it to WCD2 502b. The interference assistance information may include information related to the base layer corresponding to the uplink signal. For example, the interference assistance information may include a first MCS and a PSF of the uplink signal. In some examples, WCD1 502a may transmit the interference assistance information within a sidelink control information (SCI) for the sidelink signal. The SCI may further include, for example, a second MCS for the sidelink signal. In other examples, WCD1 502a may transmit the interference assistance information separately from the SCI. For example, WCD1 502a may transmit the interference assistance information in one or more RBs separated from the RBs allocated for the SCI within the time slots allocated for the superposition transmission.

[0110] At 520, WCD2 502b may utilize the interference assistance information to cancel interference from the superimposed transmission (e.g., a base layer including an uplink signal) to obtain an enhancement layer including a sidelink signal. For example, based on a first MCS and a PSF of the uplink signal, WCD2 502b may be configured to isolate the uplink signal and cancel the uplink signal from the received superimposed transmission. WCD2 502b may then decode the received sidelink signal.

[0111] Figure 6 6 is a diagram illustrating an exemplary overlay transmission 602 generated by a WCD according to some aspects. Overlay transmission 602 includes a base layer (BL) 604 corresponding to an uplink signal and an enhancement layer (EL) 606 corresponding to a sidelink signal. Each of BL 604 and EL 606 is generated at respective powers 608a and 608b within a total power budget 610 of the WCD. Figure 6In the example shown in , BL 604 is generated at a first power 608a that is higher than a second power 608b used to generate EL 606. Each of first power 608a and second power 608b may be determined by the WCD based on a PSF received from a base station and a total power budget 610.

[0112] Figure 7 is a signaling diagram illustrating other exemplary signaling for superimposed transmission of sidelink and uplink within a wireless communication network according to some aspects. The wireless communication network may correspond to, for example Figure 1 , 2 4. The wireless communication network may include two or more wireless communication devices (WCDs) 702a and 704b and a base station 704. Each WCD 702a and 702b may correspond to, for example, Figure 1 , 2 and / or the UE, D2D device or V2X device shown in 4. The base station 704 may correspond to, for example, Figure 1 , 2 and / or the gNB or eNB illustrated in any one or more of 4.

[0113] At 706, the first WCD 702a (e.g., WCD1) may receive a sidelink signal from at least a second WCD 702b via at least one corresponding PC5 link (e.g., PC5 interface). The sidelink signal may include, for example, a PSCCH and / or a PSSCH carrying an SCI. At 708, WCD1 702a may receive a sidelink signal from at least a second WCD 702b during a time window (T w ) to measure the average path loss on the side link (e.g., on one or more PC5 interfaces with other WCDs). In some examples, WCD1 702a may measure the average path loss on the side link (e.g., on one or more PC5 interfaces with other WCDs) within T w The reference signal received power (RSRP) of the reference signal included in the SCI decoded from a nearby WCD (eg, WCD2 702b) is measured internally. WCD1 702a may then calculate T w The average RSRP within is used to determine the side link path loss.

[0114] At 710, WCD1 702a may generate a request for resources for transmitting a sidelink signal and transmit it to the base station 704 together with the average sidelink path loss obtained at 708. In some examples, the request may include a scheduling request. For example, the scheduling request may include the sidelink path loss and one or more of the following: a sidelink packet priority of the sidelink signal, or a sidelink buffer status report. In some examples, the scheduling request may include a request for resources for superimposed transmission of the sidelink signal and the uplink signal. In this example, the scheduling request may further include one or more of the following: an uplink packet priority of the uplink signal, an uplink buffer status report, an uplink quality (e.g., an uplink path loss measured by WCD1 702a on a Uu cellular link (e.g., a Uu interface)), and / or other parameters related to the uplink signal. In other examples, the uplink quality may be provided to the base station 704 separately from the scheduling request. The uplink path loss may correspond to, for example, a path loss measured by WCD1 on a downlink. In some examples, the scheduling request may include separate scheduling requests for the sidelink signal and the uplink signal. In this example, these separate scheduling requests may be transmitted in the same time slot (e.g., in different UCIs of the PUCCH) or in different time slots.

[0115] At 712, base station 704 may determine one or more parameters for superposition transmission. For example, base station 704 may allocate resources on a common carrier shared between sidelink communications (e.g., communications over a PC5 link / interface) and uplink communications (e.g., communications over a Uu link / interface) for superposition transmission. Base station 704 may further determine respective MCSs for WCD1 702a to use for sidelink signals and uplink signals. For example, base station 704 may determine a first MCS for uplink signals and a second MCS for sidelink signals. The first and second MCSs may be the same or different.

[0116] In addition, the base station 704 may determine a power splitting factor (PSF) to be used by WCD1 702a when dividing the total power budget of WCD1 702a between a first power of a base layer corresponding to an uplink signal transmitted in an overlay and a second power of an enhancement layer corresponding to a sidelink signal transmitted in an overlay. For example, based on the sidelink path loss and the uplink path loss provided by WCD1 702a, the base station 704 may determine a first minimum power of the uplink signal at which the uplink signal can be decoded by the base station 704 and a second minimum power of the sidelink signal at which the sidelink signal can be decoded by a second (receiving) WCD 702b (e.g., WCD2). The base station 704 may then identify the power splitting factor based on the first minimum power and the second minimum power.

[0117] The base station 704 may further configure one or more power control parameters for the superposition transmission. For example, the base station 704 may configure open-loop power control parameters and closed-loop power control parameters for the superposition transmission. In some examples, the base station 704 may update one or more of these open-loop parameters for the superposition transmission. For example, the base station 704 may increase the path loss compensation factor (α) of the open-loop power control parameters to allow WCD1702a to compensate more for the uplink path loss. As another example, the base station 704 may modify a cell-specific (or WCD-specific) parameter (P o ).

[0118] At 714, the base station 704 may transmit a grant of resources allocated for the superposition transmission to WCD1 702a. In some examples, the grant may be included in the DCI of the PDCCH. The DCI may further include a corresponding MCS selected for each of the uplink signal and the sidelink signal. In addition, the DCI may include a PSF. The base station 704 may further transmit open-loop and closed-loop power control parameters to WCD1 702a. In some examples, the base station 704 may transmit one or more TPC commands, which include, for example, closed-loop power control parameters and / or open-loop power control parameters for superposition transmission. The TPC command may be included, for example, in the DCI or a media access control-control element (MAC-CE). In some examples, a TPC command containing updated open-loop power control parameters may be included with the grant. In some examples, a TPC command containing closed-loop power control parameters may be included with the grant or transmitted separately. For example, the closed-loop power control parameters may be transmitted before receiving a request for resources for superposition transmission.

[0119] At 716, WCD1 702a may generate an overlay transmission including a base layer corresponding to an uplink signal and an enhancement layer corresponding to a sidelink signal and transmit the overlay transmission to base station 704 and at least WCD2 702b. In some examples, the sidelink signal includes a broadcast or multicast signal that may be transmitted to and / or received by two or more receiving parties WAD. In some examples, WCD1 702a may determine a total power budget for the overlay transmission of WCD1 702a based on open-loop and closed-loop power control parameters, and apply a PSF to the total power budget to generate the base layer at a first power and the enhancement layer at a second power, as indicated in equations 1 and 2 above. For example, WCD1 702a may generate an uplink signal at a first power using a first MCS (selected by base station 704 for the uplink signal) to generate the base layer. Additionally, WCD1 702a may generate a sidelink signal at a second power using a second MCS (selected by base station 704 for the sidelink signal) to generate the enhancement layer. WCD1 702a may then overlay the enhancement layer on the base layer to produce an overlay transmission.

[0120] At 718, base station 704 may receive and decode the base layer including the uplink signal. Based on the PSF, WCD1 702a may not transmit the enhancement layer at a power high enough for base station 704 to receive the enhancement layer. Thus, base station 704 may perform normal decoding of the uplink signal.

[0121] At 720, WCD1 702a may further generate interference assistance information and transmit it to WCD2 702b. The interference assistance information may include information related to the base layer corresponding to the uplink signal. For example, the interference assistance information may include a first MCS and a PSF for the uplink signal. In some examples, WCD1 702a may transmit the interference assistance information within a sidelink control information (SCI) for the sidelink signal. The SCI may further include, for example, a second MCS for the sidelink signal. In other examples, WCD1 702a may transmit the interference assistance information separately from the SCI. For example, WCD1 702a may transmit the interference assistance information in one or more RBs separated from the RBs allocated for the SCI within the time slots allocated for the superposition transmission.

[0122] At 722, WCD2 702b may utilize the interference assistance information to cancel interference from the superimposed transmission (e.g., a base layer including an uplink signal) to obtain an enhancement layer including a sidelink signal. For example, based on a first MCS and a PSF of the uplink signal, WCD2 702b may be configured to isolate the uplink signal and cancel the uplink signal from the received superimposed transmission. WCD2 702b may then decode the received sidelink signal.

[0123] Figure 8 is a signaling diagram illustrating other exemplary signaling for superimposed transmission of sidelink and uplink within a wireless communication network according to some aspects. The wireless communication network may correspond to, for example Figure 1 , 2 4. The wireless communication network may include two or more wireless communication devices (WCDs) 802a and 802b and a base station 804. Each WCD 802a and 802b may correspond to, for example, Figure 1 , 2 and / or the UE, D2D device or V2X device shown in 4. The base station 804 may correspond to, for example, Figure 1 , 2 and / or the gNB or eNB illustrated in any one or more of 4.

[0124] At 806, the first WCD 802a (eg, WCD1) may generate and transmit an overlay capability indication to the base station 804. The overlay capability indication may indicate the ability of WCD1 802a to perform overlay transmissions of uplink and sidelink signals.

[0125] At 808, WCD1 802a may then generate and transmit a request for resources for transmitting the sidelink signal to base station 804. In some examples, the request may include a scheduling request. For example, the scheduling request may include one or more of: a sidelink packet priority of the sidelink signal, a sidelink buffer status report, or a sidelink quality (e.g., an average sidelink path loss).

[0126] At 810, WCD1 802a may further generate a request for resources for transmitting an uplink signal and transmit it to the base station 804. In some examples, the request may include a scheduling request separate from the scheduling request for the transmission of the opposite link signal. In this example, these separate scheduling requests may be transmitted in the same time slot (e.g., in different UCIs of the PUCCH) or in different time slots. In some examples, the scheduling request may further include one or more of the following: uplink packet priority of the uplink signal, uplink buffer status report, uplink quality (e.g., uplink path loss measured by WCD1 802a on the Uu link / interface), and / or other parameters related to the uplink signal. In other examples, the uplink quality may be provided to the base station 804 separately from the scheduling request. The uplink path loss may correspond to, for example, the path loss measured by WCD1 on the downlink.

[0127] At 812, the base station 804 may determine the resources to be allocated for the superposition transmission of the side link signal and the uplink signal based on the superposition capability indication and the received scheduling request. In some examples, the base station 804 may determine the resources to be allocated for the superposition transmission based on the side link scheduling request and the previously configured uplink resources (e.g., semi-persistently scheduled (SPS) resources or other periodic uplink resources) (rather than the uplink scheduling request). The base station may further allocate one or more parameters for superposition transmission. For example, the base station 804 may allocate resources on a common carrier shared between the side link communication (e.g., communication via a PC5 link / interface) and the uplink communication (e.g., communication via a Uu link / interface) for superposition transmission. The base station 804 may further determine the corresponding MCS for the side link signal and the uplink signal for WCD1 802a. For example, the base station 804 may determine a first MCS for the uplink signal and a second MCS for the side link signal. The first and second MCSs may be the same or different.

[0128] In addition, the base station 804 may determine a power splitting factor (PSF) to be used by WCD1 802a when dividing the total power budget of WCD1 802a between a first power of a base layer corresponding to an uplink signal transmitted in an overlay and a second power of an enhancement layer corresponding to a sidelink signal transmitted in an overlay. For example, based on the sidelink path loss and the uplink path loss provided by WCD1 802a, the base station 804 may determine a first minimum power of the uplink signal at which the uplink signal can be decoded by the base station 804 and a second minimum power of the sidelink signal at which the sidelink signal can be decoded by a second (receiving) WCD 802b (e.g., WCD2). The base station 804 may then identify the power splitting factor based on the first minimum power and the second minimum power.

[0129] At 814, base station 804 may transmit a grant of resources allocated for overlay transmission to WCD1 802a. In some examples, the grant may be included in a DCI of the PDCCH. The DCI may further include a respective MCS selected for each of the uplink signal and the sidelink signal. Additionally, the DCI may include a PSF.

[0130] At 816, WCD1 802a may generate an overlay transmission including a base layer corresponding to an uplink signal and an enhancement layer corresponding to a sidelink signal and transmit the overlay transmission to base station 804 and at least WCD2 802b. In some examples, the sidelink signal includes a broadcast or multicast signal that may be transmitted to and / or received by two or more receiving parties WAD. In some examples, WCD1 802a may determine a total power budget for the overlay transmission of WCD1 802a based on open-loop and closed-loop power control parameters provided by base station 804, and apply a PSF to the total power budget to generate the base layer at a first power and the enhancement layer at a second power, as indicated in equations 1 and 2 above. For example, WCD1 802a may generate an uplink signal at a first power using a first MCS (selected by base station 804 for the uplink signal) to generate the base layer. In addition, WCD1 802a may generate a sidelink signal at a second power using a second MCS (selected by base station 804 for the sidelink signal) to generate the enhancement layer. WCD1 802a may then overlay the enhancement layer on the base layer to produce an overlay transmission.

[0131] At 818, base station 804 may receive and decode the base layer including the uplink signal. Based on the PSF, WCD 1802a may not be transmitting the enhancement layer at a power high enough for base station 804 to receive the enhancement layer. Thus, base station 804 may perform normal decoding of the uplink signal.

[0132] At 820, WCD1 802a may further generate interference assistance information and transmit it to WCD2 802b. The interference assistance information may include information related to the base layer corresponding to the uplink signal. For example, the interference assistance information may include a first MCS and a PSF for the uplink signal. In some examples, WCD1 802a may transmit the interference assistance information within a sidelink control information (SCI) for the sidelink signal. The SCI may further include, for example, a second MCS for the sidelink signal. In other examples, WCD1 802a may transmit the interference assistance information separately from the SCI. For example, WCD1 802a may transmit the interference assistance information in one or more RBs separated from the RBs allocated for the SCI within the time slot(s) allocated for the superposition transmission.

[0133] At 822, WCD2 802b may utilize the interference assistance information to cancel interference from the superimposed transmission (e.g., a base layer including the uplink signal) to obtain an enhancement layer including the sidelink signal. For example, based on a first MCS and PSF of the uplink signal, WCD2 802b may be configured to isolate the uplink signal and cancel the uplink signal from the received superimposed transmission. WCD2 802b may then decode the received sidelink signal.

[0134] Fig. 9 9 is a block diagram illustrating an example of a hardware implementation for a base station 900 employing a processing system 914. For example, the base station 900 may correspond to the base station 900 as described above with reference to Figure 1 , 2 , 4, 5, 7 and / or 8 shown and described gNB or eNB.

[0135] The base station 900 may be implemented with a processing system 914 including one or more processors 904. Examples of the processor 904 include a microprocessor, a microcontroller, a digital signal processor (DSP), a field programmable gate array (FPGA), a programmable logic device (PLD), a state machine, a gated logic, a discrete hardware circuit, and other suitable hardware configured to perform various functionalities described throughout the present disclosure. In various examples, the base station 900 may be configured to perform any one or more of the functions described herein. That is, the processor 904 as utilized in the base station 900 may be used to implement any one or more of the processes and procedures described below.

[0136] In this example, the processing system 914 may be implemented with a bus architecture generally represented by bus 902. Bus 902 may include any number of interconnecting buses and bridges depending on the specific application and overall design constraints of the processing system 914. Bus 902 links together various circuits including one or more processors (generally represented by processor 904), memory 905, and computer readable media (generally represented by computer readable media 906). Bus 902 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 further.

[0137] The bus interface 908 provides an interface between the bus 902 and the transceiver 910. The transceiver 910 provides a means for communicating with various other devices via a transmission medium (e.g., an air interface). Depending on the characteristics of the device, a user interface 912 (e.g., a keypad, a display, a touch screen, a speaker, a microphone, a control knob, etc.) may also be provided. Of course, such a user interface 912 is optional and may be omitted in some examples.

[0138] The processor 904 is responsible for managing the bus 902 and general processing, including the execution of software stored on the computer-readable medium 906. Software should be broadly interpreted to mean instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether it is described in software, firmware, middleware, microcode, hardware description language, or other terms. The software, when executed by the processor 904, causes the processing system 914 to perform the various functions described below for any specific equipment. The computer-readable medium 906 and memory 905 can also be used to store data manipulated by the processor 904 when executing the software.

[0139] The computer-readable medium 906 may be a non-transient computer-readable medium. As examples, non-transient computer-readable media include magnetic storage devices (e.g., hard disks, floppy disks, magnetic tapes), optical disks (e.g., compact disks (CDs) or digital versatile disks (DVDs)), smart cards, flash memory devices (e.g., card, stick, or key-type 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. The computer-readable medium 906 may reside in the processing system 914, be external to the processing system 914, or be distributed across multiple entities including the processing system 914. The computer-readable medium 906 may be implemented in a computer program product. As an example, a computer program product may include a computer-readable medium in a packaging material. In some examples, the computer-readable medium 906 may be part of the memory 905. Those skilled in the art will recognize how to best implement the described functionality presented throughout this disclosure depending on the particular application and the overall design constraints imposed on the overall system.

[0140] In some aspects of the present disclosure, the processor 904 may include a circuit system configured for various functions. For example, the processor 904 may include a resource assignment and scheduling circuit system 941, which is configured to: generate, schedule and modify resource assignments or grants for time-frequency resources (e.g., a set of one or more resource elements). For example, the resource assignment and scheduling circuit system 941 may schedule time-frequency resources within multiple time division duplex (TDD) and / or frequency division duplex (FDD) subframes, time slots and / or mini-slots to carry user data traffic and / or control information to and / or from multiple UEs.

[0141] In some examples, the resource assignment and scheduling circuit system 941 can be configured to allocate / schedule resources on the uplink for transmitting one or more scheduling requests from a wireless communication device in wireless communication with a base station. For example, the resource assignment and scheduling circuit system 941 can be configured to schedule resources for the wireless communication device to transmit a scheduling request for a sidelink signal and / or a scheduling request for an uplink signal.

[0142] The resource assignment and scheduling circuit system 941 may be further configured to schedule resources for superposition transmission of a base layer including an uplink signal and an enhancement layer including a sidelink signal by the wireless communication device. The resource assignment and scheduling circuit system 941 may be further configured to schedule resources on a downlink for transmitting downlink control information (DCI), the DCI including a grant indicating resources allocated for superposition transmission. The resource assignment and scheduling circuit system 941 may be further configured to execute resource assignment and scheduling software 951 stored in the computer-readable medium 906 to implement one or more of the functions described herein.

[0143] The processor 904 may further include a communication and processing circuit system 942, which is configured to communicate with one or more wireless communication devices via the transceiver 910. The communication and processing circuit system 942 may include one or more hardware components that provide a physical structure for performing processes related to wireless communication (e.g., signal reception and / or signal transmission) and signal processing (e.g., processing received signals and / or processing signals for transmission). For example, the communication and processing circuit system 942 may be configured to generate and transmit downlink user data traffic and downlink control channels in one or more subframes, time slots and / or mini-slots based on resources assigned to downlink user data traffic and / or downlink control information by the resource assignment and scheduling circuit system 941. In addition, the communication and processing circuit system 942 may be configured to receive and process uplink user data traffic and uplink control channels in one or more subframes, time slots and / or mini-slots based on resources assigned to uplink user data traffic and / or uplink control information by the resource assignment and scheduling circuit system 941.

[0144] In some examples, the communication and processing circuit system 942 may be configured to receive and process one or more scheduling requests from the wireless communication device requesting resources for transmitting side link signals and / or uplink signals. The communication and processing circuit system 942 may be further configured to receive and process the average side link path loss and / or uplink path loss (e.g., measured by the wireless communication device on the downlink) measured by the wireless communication device within a time window. The received uplink and side link path loss 918 may be further received in the scheduling request(s). In addition, the communication and processing circuit system 942 may store the received uplink and side link path loss 918, for example, in the memory 905 for subsequent processing thereof.

[0145] In addition, the communication and processing circuit system 942 may be configured to generate a grant of resources allocated by the resource assignment and scheduling circuit system 941 for the superposition transmission of uplink signals and side link signals and transmit it to the wireless communication device. In some examples, the grant may be included in the DCI of the PDCCH. The DCI may further include a corresponding MCS selected for each of the uplink signal and the side link signal. In addition, the DCI may include a power partitioning factor (PSF). The communication and processing circuit system 942 may be further configured to generate and transmit one or more TPC commands, which include open-loop and closed-loop power control parameters for superposition transmission to the wireless communication device. The TPC command may be included in, for example, the DCI or the media access control-control element (MAC-CE). The communication and processing circuit system 942 may be further configured to execute the communication and processing software 952 stored on the computer-readable medium 906 to implement one or more functions described herein.

[0146] The processor 904 may further include an overlay transmission determination circuit system 943 configured to determine resources to be allocated for overlay transmission to the wireless communication device. In some examples, the overlay transmission determination circuit system 943 may determine to allocate overlay resources based on separate scheduling requests received from the wireless communication device that each request resources for one of the sidelink signal and the uplink signal. For example, the overlay transmission determination circuit system 943 may determine to allocate resources for overlay transmission based on a capability indication received from the wireless communication device indicating that the wireless communication device is capable of performing overlay transmission.

[0147] In other examples, the superposition transmission determination circuit system 943 may be configured to determine the allocation of superposition resources based on a scheduling request for superposition resources (e.g., a scheduling request request for resources for superposition transmission of a sidelink signal and an uplink signal). In other examples, the superposition transmission determination circuit system 943 may determine the allocation of superposition resources based on the sidelink scheduling request and previously configured uplink resources (e.g., semi-persistently scheduled (SPS) resources or other periodic uplink resources). In this example, the superposition transmission determination circuit system 943 may determine the resources to be allocated for superposition transmission based on a superposition capability indication received from the wireless communication device.

[0148] The superposition transmission determination circuit system 943 may be further configured to operate with the resource assignment and scheduling circuit system 941 to allocate resources on a common carrier shared between sidelink communication (e.g., communication via a PC5 link) and uplink communication (e.g., communication via a Uu link) for superposition transmission. For example, the resource assignment and scheduling circuit system 941 may allocate one or more PRBs or REs within a time slot (or multiple time slots) of the common carrier for superposition transmission. The superposition transmission determination circuit system 943 may be further configured to execute the superposition transmission determination software 953 stored on the computer-readable medium 906 to implement one or more functions described herein.

[0149] The processor 904 may further include an MCS selection circuit system 944 configured to select a corresponding MCS 915 for each of the uplink signal and the sidelink signal. In some examples, the uplink MCS and the sidelink MCS may be the same or different. In addition, the MCS selection circuit system 944 may store the MCS 915 selected for each of the sidelink signal and the uplink signal in the memory 905 for use by the communication and processing circuit system 942 when generating and transmitting the DCI for the superposition transmission. The MCS selection circuit system 944 may be further configured to execute the MCS selection software 954 stored on the computer-readable medium 906 to implement one or more functions described herein.

[0150] The processor 904 may further include a power determination circuit system 945 configured to determine a PSF 916 for superposition transmission. In some examples, the power determination circuit system 945 may be configured to determine the PSF based on the uplink and sidelink path losses 918 provided by the wireless communication device. For example, the power determination circuit system 945 may determine a first minimum power of the uplink signal at which the uplink signal can be decoded by the base station 900 based on the uplink path loss and a second minimum power of the sidelink signal at which the sidelink signal can be decoded by the second (receiving) wireless communication device based on the sidelink path loss. The power determination circuit system 945 may then identify the PSF 916 based on the first minimum power and the second minimum power. For example, the power determination circuit system 945 may select the PSF 916 to ensure that the transmit power of the base layer including the uplink signal is greater than or equal to the first minimum power and the transmit power of the enhancement layer including the sidelink signal is greater than or equal to the second minimum power. PSF 916 may be stored, for example, in memory 905, for use by communications and processing circuitry 942 in generating and transmitting DCI for overlay transmissions.

[0151] The power determination circuit system 945 may be further configured to set one or more power control parameters for superposition transmission. For example, the power determination circuit system 945 may be configured to set open-loop power control parameters and closed-loop power control parameters for superposition transmission. In some examples, the power determination circuit system 945 may update one or more of these open-loop parameters for superposition transmission. For example, the power determination circuit system 945 may increase the path loss compensation factor (α) of the open-loop power control parameter to allow the wireless communication device to compensate more for the uplink path loss. As another example, the power determination circuit system 945 may modify a cell-specific (or WCD-specific) parameter (P o ). The power determination circuit system 945 may further operate with the communication and processing circuit system 942 to transmit one or more TPC commands to the wireless communication device, the one or more TPC commands including open-loop power control parameters and closed-loop power control parameters. For example, the TPC command may be included in the DCI and / or within the MAC-CE. The power determination circuit system 945 may be further configured to execute power determination software 955 stored on the computer-readable medium 906 to implement one or more functions described herein.

[0152] Fig.10 1014 is a conceptual diagram illustrating an example of a hardware implementation for an exemplary wireless communication device 1000 employing a processing system 1014. For example, the wireless communication device 1000 may be as described in Figure 1 , 2, 4, 5, 7 and / or 8 as illustrated in any one or more of the UE, D2D device or V2X device.

[0153] The wireless communication device 1000 may be implemented using a processing system 1014 including one or more processors 1004. Examples of the processor 1004 include a microprocessor, a microcontroller, a digital signal processor (DSP), a field programmable gate array (FPGA), a programmable logic device (PLD), a state machine, a gated logic, a discrete hardware circuit, and other suitable hardware configured to perform various functionalities described throughout this disclosure. In various examples, the wireless communication device 1000 may be configured to perform any one or more of the functions described herein. That is, the processor 1004 as utilized in the wireless communication device 1000 may be used to implement any one or more of the processes described below. In some instances, the processor 1004 may be implemented via a baseband or modem chip, while in other implementations, the processor 1004 itself may include a number of devices distinct and different from the baseband or modem chip (e.g., which may work together in such scenarios to achieve the embodiments discussed herein). And as mentioned above, various hardware arrangements and components outside of the baseband modem processor may be used in implementations, including RF chains, power amplifiers, modulators, buffers, interleavers, adders / summers, etc.

[0154] In this example, the processing system 1014 may be implemented with a bus architecture generally represented by bus 1002. Depending on the specific application and overall design constraints of the processing system 1014, the bus 1002 may include any number of interconnecting buses and bridges. The bus 1002 communicatively couples various circuits including one or more processors (generally represented by processor 1004), memory 1005, and computer-readable media (generally represented by computer-readable media 1006). The bus 1002 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 further. The bus interface 1008 provides an interface between the bus 1002 and the transceiver 1010. The transceiver 1010 provides a means for communicating with various other devices via a transmission medium (e.g., an air interface). A user interface 1012 (e.g., a keypad, a display, a speaker, a microphone, a joystick) may also be provided.

[0155] The processor 1004 is responsible for managing the bus 1002 and general processing, including the execution of software stored on the computer-readable medium 1006. The software, when executed by the processor 1004, causes the processing system 1014 to perform the various functions described below for any particular device. The computer-readable medium 1006 and the memory 1005 may also be used to store data that is manipulated by the processor 1004 when executing the software.

[0156] One or more processors 1004 in the processing system can execute software. Software should be broadly interpreted to mean instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether described in software, firmware, middleware, microcode, hardware description language, or other terms. The software can reside on a computer-readable medium 1006.

[0157] The computer-readable medium 1006 may be a non-transient computer-readable medium. As an example, a non-transient computer-readable medium includes a magnetic storage device (e.g., a hard disk, a floppy disk, a magnetic tape), an optical disk (e.g., a compact disk (CD) or a digital versatile disk (DVD)), a smart card, a flash memory device (e.g., a card, a stick, or a key-type drive), a random access memory (RAM), a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), a register, a removable disk, and any other suitable medium for storing software and / or instructions that can be accessed and read by a computer. As an example, the computer-readable medium may also include a carrier wave, a transmission line, and any other suitable medium for transmitting software and / or instructions that can be accessed and read by a computer. The computer-readable medium 1006 may reside in the processing system 1014, outside the processing system 1014, or distributed across multiple entities including the processing system 1014. The computer-readable medium 1006 may be implemented in a computer program product. In some examples, computer readable medium 1006 may be part of memory 1005. As an example, a computer program product may include a 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.

[0158] In some aspects of the present disclosure, the processor 1004 may include circuit systems configured for various functions. For example, the processor 1004 may include a communication and processing circuit system 1041, which is configured to communicate with a base station and one or more other wireless communication devices via a common carrier shared between a cellular (e.g., Uu) interface and a side link (e.g., PC5) interface. In some examples, the communication and processing circuit system 1041 may include one or more hardware components that provide a physical structure for performing processes related to wireless communication (e.g., signal reception and / or signal transmission) and signal processing (e.g., processing received signals and / or processing signals for transmission).

[0159] In some examples, the communication and processing circuit system 1041 may be configured to generate and transmit one or more scheduling requests to the base station requesting resources for transmitting side link signals and / or uplink signals. For example, the communication and processing circuit system 1041 may transmit a first scheduling request requesting resources for side link signals and a second scheduling request requesting resources for uplink signals. As another example, the communication and processing circuit system 1041 may transmit a single scheduling request requesting resources for superposition transmission of uplink signals and side link signals. The communication and processing circuit system 1041 may further include the side link path loss in the scheduling request for the side link signal or superposition transmission. The uplink path loss may be further transmitted by the communication and processing circuit system 1041 together with the scheduling request for the uplink signal or superposition transmission or separately from the scheduling request. The communication and processing circuit system 1041 may further generate and transmit to the base station a capability indication indicating the capability of the wireless communication device 1000 to perform superposition transmission.

[0160] The communication and processing circuit system 1041 may be further configured to receive and process a grant of resources for superposition transmission from a base station. In some examples, the grant may be received within a DCI, which further includes a corresponding MCS 1015 to be used for each of the uplink signal and the side link signal and a power partitioning factor (PSF) 1016 to be applied to the uplink signal and the side link signal. (All) MCS 1015 and PSF 1016 may be further stored in, for example, a memory 1005 for further processing. In some examples, the communication and processing circuit system 1041 may be further configured to receive one or more TPC commands from a base station, the one or more TPC commands including an open-loop power control parameter and a closed-loop power control parameter. The received open-loop / closed-loop power control parameter (power parameter) 1018 may be further stored in, for example, a memory 1005 for further processing.

[0161] The communication and processing circuit system 1041 may be further configured to generate a superposition transmission of the uplink signal and the side link signal based on the allocated resources, the corresponding MCS for the uplink signal and the side link signal, and the PSF. For example, the communication and processing circuit system 1041 may be further configured to generate a superposition transmission including a base layer corresponding to the uplink signal and an enhancement layer corresponding to the side link signal and transmit the superposition transmission to the base station and one or more receiving wireless communication devices. In some examples, the side link signal includes a broadcast or multicast signal that can be transmitted to and / or received by two or more receiving wireless communication devices.

[0162] The communication and processing circuit system 1041 may be further configured to receive and process superimposed transmissions received from a transmitting wireless communication device via the transceiver 1010 over a common carrier. The communication and processing circuit system 1041 may be further configured to execute communication and processing software 1051 stored in the computer-readable medium 1006 to implement one or more of the functions described herein.

[0163] Processor 1004 may further include path loss measurement circuitry 1042 configured to measure the time window (T w ) (e.g., on one or more PC5 links / interfaces with other wireless communication devices). In some examples, path loss measurement circuitry 1042 may measure T w The path loss measurement circuitry 1042 may then calculate T w The path loss measurement circuit system 1042 may be further configured to measure the uplink path loss. The uplink path loss may correspond to, for example, the path loss measured on the downlink. For example, the path loss measurement circuit system 1042 may measure the RSRP of the reference signal included in the DCI from the base station to determine the uplink path loss. The path loss measurement circuit system 1042 may be further configured to provide the measured side link and uplink path losses to the communication and processing circuit system 1041 for transmission to the base station. The path loss measurement circuit system 1042 may be further configured to execute the path loss measurement software 1052 stored in the computer-readable medium 1006 to implement one or more of the functions described herein.

[0164] The processor 1004 may further include a power split management circuit system 1043 configured to apply the received PSF 1016 to the total power budget of the wireless communication device 1000 to determine a first power at which an uplink signal will be generated and a second power at which a side link signal will be generated. In some examples, the power split management circuit system 1043 may determine the total power budget of the wireless communication device 1000 based on an open-loop / closed-loop power control parameter 1018 received from the base station. In some examples, one or more open-loop and / or closed-loop power control parameters 1018 may be updated by the base station for superposition transmission. The power split management circuit system 1043 may further operate with the communication and processing circuit system 1041 to apply the PSF 1016 to the total power budget to generate a base layer at a first power and an enhancement layer at a second power. For example, the communication and processing circuit system 1041 may generate an uplink signal at a first power using a first MCS 1015 (selected by the base station for the uplink signal) to produce a base layer. In addition, communication and processing circuit system 1041 may generate a side link signal at a second power using a second MCS 1015 (selected by the base station for the side link signal) to produce an enhancement layer. Communication and processing circuit system 1041 may then overlay the enhancement layer on the base layer to produce an overlay transmission, and transmit the overlay transmission via transceiver 1010. Power division management circuit system 1043 may be further configured to execute power division management software 1053 stored in computer-readable medium 1006 to implement one or more functions described herein.

[0165] The processor 1004 may further include an interference cancellation circuit system 1044, which is configured to transmit or receive interference assistance information. In an example in which the wireless communication device 1000 is a transmitting wireless communication device that generates and transmits a superimposed transmission, the interference cancellation circuit system 1044 may be configured to operate with the communication and processing circuit system 1041 to generate and transmit interference assistance information 1019 to the receiving wireless communication device (s), the interference assistance information 1019 including, for example, the MCS 1015 of the uplink signal and the PSF 1016. In some examples, the communication and processing circuit system 1041 may transmit the interference assistance information 1019 within the side link control information (SCI) for the superimposed transmission including the side link signal. The SCI may further include, for example, a second MCS 1015 of the side link signal. In other examples, the communication and processing circuit system 1041 may transmit the interference assistance information 1019 separately from the SCI. For example, the communication and processing circuitry 1041 may transmit the interference assistance information 1019 in one or more RBs separate from the RBs allocated for SCI within the time slot(s) allocated for superposition transmission.

[0166] In an example where the wireless communication device is a receiving wireless communication device that receives a superimposed transmission, the interference cancellation circuit system 1044 may be configured to receive interference assistance information 1019 via the communication and processing circuit system 1041 and store the interference assistance information in, for example, the memory 1005. The interference cancellation circuit system 1044 may be further configured to operate with the communication and processing circuit system 1041 to utilize the interference assistance information 1019 to cancel interference from the superimposed transmission (e.g., a base layer including an uplink signal) to obtain an enhancement layer including a side link signal. For example, based on the first MCS 1015 and PSF 1016 of the uplink signal, the interference cancellation circuit system 1044 may be configured to isolate the uplink signal and eliminate the uplink signal from the received superimposed transmission. The communication and processing circuit system 1041 may then decode the received side link signal. The interference cancellation circuit system 1044 may be further configured to execute the interference cancellation software 1054 stored in the computer-readable medium 1006 to implement one or more of the functions described herein.

[0167] Fig.11 1100 is a flow chart of a method for a wireless communication device to generate and transmit a superimposed transmission of an uplink signal and a sidelink signal according to some aspects. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required to implement all embodiments. In some examples, the method may be as described above and in Fig.10 The wireless communication device 1000 illustrated in the accompanying drawings is executed by a processor or a processing system, or by any suitable means for performing the described functions.

[0168] At block 1102, a first (e.g., transmitting) wireless communication device may communicate with a base station via a first link and communicate with a second side link device via a second link on a common carrier shared between a first link (e.g., a Uu cellular interface) and a second link (e.g., a side link PC5 interface). Fig.10 The communication and processing circuitry 1041 and transceiver 1010 as shown and described may provide means for communicating with a base station and a second side-link device over a common carrier.

[0169] In block 1104, the first wireless communication device may receive a grant from a base station, the grant including an indication of resources on a common carrier for transmitting a superimposed transmission, the superimposed transmission including a base layer corresponding to an uplink signal to be transmitted to the base station and an enhancement layer corresponding to a sidelink signal to be transmitted to at least a second wireless communication device. In some examples, the sidelink signal may include a broadcast or multicast signal that may be transmitted to and / or received by two or more receiving wireless communication devices. In some examples, the first wireless communication device may receive the grant within a DCI. The DCI may further include a corresponding MCS to be used for each of the uplink signal and the sidelink signal. In addition, the DCI may include a power splitting factor (PSF) to be used between the base layer and the enhancement layer. In some examples, the first wireless communication device may further receive an open-loop power control parameter and a closed-loop power control parameter that may be used for the superimposed transmission. For example, the open-loop power control parameter may include one or more updated open-loop power control parameters updated for the superimposed transmission.

[0170] In some examples, the first wireless communication device may receive a grant in response to transmitting a scheduling request for a sidelink signal, transmitting a corresponding scheduling request for a sidelink signal and an uplink signal, or transmitting a scheduling request for an overlay transmission. In some examples, the first wireless communication device may further transmit an average sidelink path loss and an uplink path loss to the base station for use in determining the PSF. For example, the sidelink and / or uplink path losses may be transmitted along with the scheduling request(s). In some examples, the first wireless communication device may receive a grant in response to transmitting a capability indication to the base station indicating the ability of the first wireless communication device to perform an overlay transmission. For example, the above in combination Fig.10 The communication and processing circuitry 1041 , along with the transceiver 1010 , as shown and described may provide means for receiving a grant.

[0171] At block 1106, the first wireless communication device may transmit interference assistance information associated with the base layer to the second wireless communication device. In some examples, the interference assistance information may include the MCS and PSF of the uplink signal. In some examples, the interference assistance information may be included in sidelink control information (SCI) for an overlay transmission including a sidelink signal. The SCI may further include, for example, the MCS of the sidelink signal. In other examples, the interference assistance information may be transmitted separately from the SCI. For example, the above in conjunction with Fig.10 The interference cancellation circuitry 1044, together with the communication and processing circuitry 1041 and transceiver 1010, as shown and described may provide a means for transmitting interference assistance information to a second wireless communication device.

[0172] In box 1108, the first wireless communication device may transmit a superimposed transmission including a base layer and an enhancement layer to the base station and the second wireless communication device. In some examples, the first wireless communication device may determine a total power budget based on an open-loop / closed-loop power control parameter. The first wireless communication device may then apply the PSF to the total power to generate the base layer at a first power and the enhancement layer at a second power. In some examples, the PSF may be multiplied by the total power budget to determine the first power. In addition, the total power budget may be multiplied by the difference between 1 and the PSF to determine the second power. In some examples, the first wireless communication device may generate an uplink signal at a first power using a first MCS (selected by the base station for the uplink signal) to produce the base layer. In addition, the first wireless communication device may generate a side link signal at a second power using a second MCS (selected by the base station for the side link signal) to produce the enhancement layer. The first wireless communication device may then superimpose the enhancement layer on the base layer to produce a superimposed transmission. For example, the above in combination Fig.10 The power partition management circuitry 1043, together with the communication and processing circuitry 1041 and transceiver 1010, as shown and described may provide a means for generating and transmitting superimposed transmissions.

[0173] Fig.12 1200 is a flowchart of another method for a wireless communication device to generate and transmit a superimposed transmission of an uplink signal and a sidelink signal according to some aspects. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required to implement all embodiments. In some examples, the method may be as described above and in Fig.10 The wireless communication device 1000 illustrated in the accompanying drawings is executed by a processor or a processing system, or by any suitable means for performing the described functions.

[0174] At block 1202, a first (e.g., transmitting) wireless communication device may receive from a base station a power splitting factor to be used between a base layer of a superimposed transmission corresponding to an uplink signal to be transmitted to the base station and an enhancement layer of the superimposed transmission corresponding to a sidelink signal to be transmitted to a second (e.g., receiving) wireless communication device. In some examples, the first wireless communication device may receive downlink control information (DCI) including the power splitting factor. For example, the above description may be combined with Fig.10 The communication and processing circuitry 1041, together with the transceiver 1010, as shown and described may provide means for receiving a power split factor.

[0175] At block 1204, the first wireless communication device may determine a total power budget for the superposition transmission. In some examples, the first wireless communication device may receive an open-loop power control parameter and a closed-loop power control parameter for the superposition transmission from a base station. At least one of the open-loop power control parameters may include an updated open-loop power control parameter updated for the superposition transmission. The first wireless communication device may then determine a total power budget based on the closed-loop power control parameter and the open-loop power control parameter. For example, the above in conjunction with Fig.10 The power partition management circuitry 1043 shown and described may provide a means for determining an overall power budget.

[0176] At block 1206, the first wireless communication device may apply the power split factor to the total power budget to generate the base layer at a first power and the enhancement layer at a second power. In some examples, the first wireless communication device may multiply the power split factor and the total power budget to determine a first power at which the base layer will be generated, and multiply the total power budget and the difference between 1 and the power split factor to determine a second power at which the enhancement layer will be generated. For example, the above with respect to Fig.10 The power partitioning management circuitry 1043 shown and described may provide means for applying power partitioning.

[0177] Fig.13 1300 is a flowchart of another method for a wireless communication device to generate and transmit a superimposed transmission of an uplink signal and a sidelink signal according to some aspects. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required to implement all embodiments. In some examples, the method may be as described above and in Fig.10 The wireless communication device 1000 illustrated in the accompanying drawings is executed by a processor or a processing system, or by any suitable means for performing the described functions.

[0178] In block 1302, a first (e.g., transmitting) wireless communication device may receive from a base station a first modulation and coding scheme (MCS) associated with an uplink signal to be transmitted to the base station and a second MCS associated with a sidelink signal to be transmitted to a second (e.g., receiving) wireless communication device. In some examples, the first wireless communication device may receive downlink control information (DCI) including at least the second MCS, a power splitting factor, and a grant of resources for superimposed transmission of the uplink signal and the sidelink signal on a common carrier shared between the uplink signal and the sidelink signal. For example, the above in conjunction with Fig.10 The communication and processing circuitry 1041 , together with the transceiver 1010 , as shown and described may provide means for receiving a first MCS and a second MCS.

[0179] At block 1304, the first wireless communication device may generate an uplink signal using a first MCS at a first power determined according to a power division factor to produce a base layer for superimposed transmission. Fig.10 The power split management circuitry 1043, together with the communication and processing circuitry 1041, as shown and described may provide means for generating an uplink signal utilizing a first MCS and a first power.

[0180] At block 1306, the first wireless communication device may generate an uplink signal at a second power determined according to the power split factor using the second MCS to produce an enhancement layer for the overlay transmission. In some examples, the first wireless communication device may apply the power split factor to the total power budget for the overlay transmission to generate the base layer at the first power and the enhancement layer at the second power. For example, the first wireless communication device may multiply the power split factor and the total power budget to determine a first power at which the base layer will be generated, and multiply the difference between the total power budget and 1 and the power split factor to determine a second power at which the enhancement layer will be generated. For example, the above in conjunction with Fig.10 The power partition management circuitry 1043, together with the communication and processing circuitry 1041, as shown and described, may provide a means for generating a sidelink signal utilizing a second MCS and a second power level.

[0181] At block 1308, the first wireless communication device may then overlay the enhancement layer on the base layer to produce an overlay transmission. Fig.10 The communication and processing circuitry 1041 shown and described may provide a means for overlaying an enhancement layer on a base layer to produce an overlay transmission.

[0182] In block 1310, the first wireless communication device may transmit interference assistance information including a first MCS and a power splitting factor to a second wireless communication device. In some examples, the first wireless communication device may transmit sidelink control information (SCI) including the interference assistance information and the second MCS to the second wireless communication device. In some examples, the first wireless communication device may transmit the interference assistance information separately from the sidelink control information including the second MCS to the second wireless communication device. For example, the above in conjunction with Fig.10 The communication and processing circuitry 1041, together with the transceiver 1010, as shown and described may provide means for transmitting interference assistance information to a second wireless communication device.

[0183] Fig.141400 is a flow chart of a method for a wireless communication device to receive superimposed transmissions of uplink signals and sidelink signals according to some aspects. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required to implement all embodiments. In some examples, the method may be as described above and in Fig.10 The wireless communication device 1000 illustrated in the accompanying drawings is executed by a processor or a processing system, or by any suitable means for performing the described functions.

[0184] At block 1402, a first (e.g., transmitting) wireless communication device may communicate with a base station via a first link and communicate with a second side link device via a second link on a common carrier shared between a first link (e.g., a Uu cellular interface) and a second link (e.g., a side link PC5 interface). Fig.10 The communication and processing circuitry 1041 and transceiver 1010 as shown and described may provide means for communicating with a base station and a second side-link device over a common carrier.

[0185] At block 1404, the first wireless communication device may receive a superimposed transmission from a second wireless communication device (WCD), the superimposed transmission comprising a base layer corresponding to an uplink signal transmitted from the second wireless communication device to a base station and an enhancement layer corresponding to a side link signal transmitted from the second wireless communication device to the first wireless communication device. The uplink signal may be transmitted using a first MCS and at a first power of a total power budget of the first wireless communication device, while the side link signal may be transmitted using a second MCS and at a second power of the total power budget. The first power and the second power may be determined based on a power splitting factor (PSF) between the base layer and the enhancement layer. For example, the communication and processing circuit system 1041 together with the transceiver 1010 may provide means for receiving the superimposed transmission.

[0186] At block 1406, the first wireless communication device may receive interference assistance information associated with the base layer from the second wireless communication device. In some examples, the interference assistance information may include an MCS of the uplink signal and a PSF indicating a first power of the base layer including the uplink signal and a second power of the enhancement layer including the sidelink signal. In some examples, the interference assistance information may be received within sidelink control information (SCI) for an overlay transmission including the sidelink signal. The SCI may further include, for example, an MCS of the sidelink signal. In other examples, the interference assistance information may be received separately from the SCI. For example, the above in conjunction with Fig.10 The interference cancellation circuitry 1044, together with the communication and processing circuitry 1041 and transceiver 1010, as shown and described may provide a means for receiving interference assistance information from a second wireless communication device.

[0187] At block 1408, the first wireless communication device may utilize the interference assistance information to eliminate the base layer from the superimposed transmission to obtain an enhancement layer including the sidelink signal. For example, based on the first MCS and PSF of the uplink signal, the first wireless communication device may isolate the uplink signal and eliminate the uplink signal from the received superimposed transmission. For example, the interference cancellation circuit system 1044 together with the communication and processing circuit system 1041 may provide a means for eliminating the base layer from the superimposed transmission.

[0188] In one configuration, the wireless communication device 1000 includes means for superimposing transmission communications as described in the present disclosure. In one aspect, the aforementioned means may be Fig.10 The processor 1004 shown in the figure is configured to perform the functions recited by the aforementioned means. On the other hand, the aforementioned means may be a circuit or any equipment configured to perform the functions recited by the aforementioned means.

[0189] Of course, in the above examples, the circuit system included in the processor 1004 is provided only as an example, and other devices for performing the functions may be included in various aspects of the present disclosure, including but not limited to those stored in the computer-readable storage medium 1006 or in the computer-readable storage medium 1006. Figure 1 , 2 and / or any other suitable equipment or device described in any of 4 and using, for example, the present invention with respect to Figure 11-14 Instructions for the described processes and / or algorithms.

[0190] Fig.15 1500 is a flowchart of an exemplary method for a base station to receive an uplink signal including a superimposed transmission of an uplink signal and a sidelink signal according to some aspects. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required to implement all embodiments. In some examples, the method may be as described above and in Fig. 9 The base station 900 illustrated in FIG. 1 is executed by a processor or a processing system, or by any suitable means for performing the described functions.

[0191] At block 1502, a base station may communicate with a first wireless communication device (WCD) via a first link on a common carrier shared between the first link (e.g., a Uu cellular interface) and a second link (e.g., a sidelink PC5 interface), the first wireless communication device further communicating with a second wireless communication device on the second link. Fig. 9 The communication and processing circuitry 942 and transceiver 910 as shown and described may provide means for communicating with a first wireless communication device over a common carrier.

[0192] In block 1504, the base station may transmit a grant to the first wireless communication device, the grant including an indication of resources on a common carrier for transmitting an overlay transmission by the first wireless communication device, the overlay transmission including a base layer corresponding to an uplink signal to be transmitted to the base station and an enhancement layer corresponding to a sidelink signal to be transmitted to at least a second wireless communication device. In some examples, the base station may further transmit a first MCS associated with the uplink signal and a second MCS associated with the sidelink signal. In some examples, the base station may further transmit to the first wireless communication device a power partitioning factor (PSF) to be used by the first wireless communication device when dividing a total power budget of the first wireless communication device between a first power of the base layer and a second power of the enhancement layer. In some examples, the base station may transmit a DCI including at least the grant, the second MCS, and the PSF.

[0193] In some examples, the base station may determine a first minimum power of an uplink signal at which the uplink signal can be decoded by the base station based on the uplink quality, determine a second minimum power of a sidelink signal at which the sidelink signal can be decoded by a second wireless communication device based on the sidelink quality, and identify the PSF based on the first minimum power and the second minimum power. In some examples, the base station may receive an uplink quality from a first wireless communication device, the uplink quality comprising a first path loss of a first link; and receive a sidelink quality from the first wireless communication device, the sidelink quality comprising a second path loss associated with at least a second link. For example, the base station may receive a scheduling request from the first wireless communication device requesting a grant for superimposed transmission. The scheduling request may further include the sidelink quality. In some examples, the scheduling request may further include at least one of: a sidelink packet priority of the sidelink signal, or a buffer status report.

[0194] In some examples, the base station may further transmit a closed-loop power control parameter and an open-loop power control parameter for superimposed transmission to the first wireless communication device for use by the first wireless communication device in determining the total power budget. In some examples, the base station may further receive a capability indication from the first wireless communication device indicating the capability of the first wireless communication device to perform superimposed transmission. For example, the above Fig. 9 The superposition transmission determination circuitry 943, together with the communication and processing circuitry 942 and transceiver 910, as shown and described may provide means for transmitting a grant for a superposition transmission to a first wireless communication device.

[0195] At 1506, the base station may receive a base layer including a superimposed transmission of an uplink signal from the first WCD. For example, the base station may receive a base layer generated by the first wireless communication device at a first power. Fig. 9The communication and processing circuitry 942 and transceiver 910 as shown and described may provide a means for receiving the base layer of the overlay transmission.

[0196] Fig.16 1600 is a flowchart of an exemplary method for a base station to receive an uplink signal including a superimposed transmission of an uplink signal and a sidelink signal according to some aspects. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required to implement all embodiments. In some examples, the method may be as described above and in Fig. 9 The base station 900 illustrated in FIG. 1 is executed by a processor or a processing system, or by any suitable means for performing the described functions.

[0197] In block 1602, the base station may transmit to the first wireless communication device a power splitting factor to be used by the first wireless communication device to divide the total power budget of the first wireless communication device between a first power of a base layer corresponding to an uplink signal transmitted in a superimposed manner and a second power of an enhancement layer corresponding to a sidelink signal transmitted in a superimposed manner. In some examples, the base station may further transmit a first modulation and coding scheme (MCS) associated with the uplink signal and a second MCS associated with the sidelink signal. For example, the base station may transmit downlink control information (DCI) including at least the second MCS, the power splitting factor, and a grant of resources for superimposed transmission of the base layer and the enhancement layer on a common carrier shared between the uplink signal and the sidelink signal. For example, the above in combination Fig. 9 The communication and processing circuitry 942, together with the transceiver 910, as shown and described may provide means for communicating a power splitting factor to a first wireless communication device.

[0198] At block 1604, the base station may transmit a closed-loop power control parameter and an open-loop power control parameter for superimposed transmission to the first wireless communication device for use by the first wireless communication device in determining the total power budget. Fig. 9 The communication and processing circuitry 942, together with the transceiver 910, as shown and described may provide means for communicating closed loop power control parameters and open loop power control parameters to the first wireless communication device.

[0199] At block 1606, the base station may receive a base layer including a superimposed transmission of an uplink signal generated at a first power from a first wireless communication device. Fig. 9 The communication and processing circuitry 942, together with the transceiver 910, as shown and described may provide a means for receiving the base layer of the overlay transmission.

[0200] Fig.171700 is a flowchart of an exemplary method for a base station to receive an uplink signal including a superimposed transmission of the uplink signal and a sidelink signal according to some aspects. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required to implement all embodiments. In some examples, the method may be as described above and in Fig. 9 The base station 900 illustrated in FIG. 1 is executed by a processor or a processing system, or by any suitable means for performing the described functions.

[0201] At block 1702, the base station may determine, based on the uplink quality, a first minimum power of an uplink signal of a superimposed transmission by a first wireless communication device at which the uplink signal can be decoded by the base station. In some examples, the base station may receive, from the first wireless communication device, an uplink quality including a first path loss of a first link between the base station and the first wireless communication device. For example, the above with respect to Fig. 9 The power determination circuitry 945 shown and described may provide means for determining the first minimum power.

[0202] In block 1704, the base station may determine, based on the side link quality, a second minimum power of the side link signal of the superimposed transmission at which the side link signal can be decoded by the second wireless communication device. In some examples, the base station may receive, from the first wireless communication device, a side link quality including a second path loss associated with at least a second link between the first wireless communication device and the second wireless communication device. In some examples, the base station may receive, from the first wireless communication device, a scheduling request requesting grant for the superimposed transmission, and the scheduling request further includes the side link quality. The scheduling request may further include at least one of: a side link packet priority of the side link signal, or a buffer status report. For example, the above in combination Fig. 9 The power determination circuitry 945 shown and described may provide means for determining the second minimum power.

[0203] At block 1706, the base station may identify, based on the first minimum power and the second minimum power, a power split factor to be used by the first wireless communication device to split the total power budget of the first wireless communication device between the first power for uplink signals and the second power for sidelink signals. Fig. 9 The power determination circuitry 945 shown and described may provide a means for identifying a power split factor.

[0204] In one configuration, the base station 900 includes means for superimposed transmission communication as described in the present disclosure. In one aspect, the aforementioned means may be Fig. 9The processor 904 shown in the figure is configured to perform the functions recited by the aforementioned means. On the other hand, the aforementioned means may be a circuit or any equipment configured to perform the functions recited by the aforementioned means.

[0205] Of course, in the above examples, the circuit system included in the processor 904 is provided only as an example, and other devices for performing the functions may be included in various aspects of the present disclosure, including but not limited to those stored in the computer-readable storage medium 906 or in the computer-readable storage medium 906. Figure 1 , 2 and / or any other suitable equipment or device described in any of 4 and using, for example, the present invention with respect to Figure 15-17 Instructions for the described processes and / or algorithms.

[0206] An overview of various examples of the disclosure is provided below.

[0207] Example 1: A method for performing sidelink wireless communication at a first wireless communication device, the method comprising: communicating with a base station via a first link and communicating with a second wireless communication device via a second link on a common carrier shared between the first link and the second link; receiving a grant from the base station, the grant including an indication of resources on the common carrier for an overlay transmission, the overlay transmission including a base layer corresponding to an uplink signal to be transmitted to the base station and an enhancement layer corresponding to a sidelink signal to be transmitted to at least a second wireless communication device; transmitting interference assistance information associated with the base layer to the second wireless communication device; and transmitting the overlay transmission including the base layer and the enhancement layer to the base station and the second wireless communication device.

[0208] Example 2: The method as described in Example 1 further includes: receiving a power division factor to be used between the base layer and the enhancement layer; determining a total power budget for the overlay transmission; and applying the power division factor to the total power budget to generate the base layer at a first power and the enhancement layer at a second power.

[0209] Example 3: A method as described in Example 2, wherein applying the power split factor further includes: multiplying the power split factor by the total power budget to determine a first power at which the base layer will be generated; and multiplying the total power budget by the difference between 1 and the power split factor to determine a second power at which the enhancement layer will be generated.

[0210] Example 4: The method as described in Example 2 or 3 further includes: receiving closed-loop power control parameters and open-loop power control parameters for the superimposed transmission, wherein at least one of the open-loop power control parameters includes an updated open-loop power control parameter updated for the superimposed transmission; and determining the total power budget based on these closed-loop power control parameters and open-loop power control parameters.

[0211] Example 5: The method as described in any one of Examples 2 to 4 further includes: receiving a first modulation and coding scheme (MCS) associated with the uplink signal and a second MCS associated with the side link signal from the base station; generating the uplink signal at a first power using the first MCS to produce the base layer; generating the side link signal at a second power using the second MCS to produce the enhancement layer; and superimposing the enhancement layer on the base layer to produce the superimposed transmission.

[0212] Example 6: The method as described in Example 5, wherein transmitting the interference assistance information further includes: transmitting the interference assistance information including the first MCS and the power splitting factor to the second wireless communication device.

[0213] Example 7: The method as described in Example 6, wherein transmitting the interference assistance information further includes: transmitting sidelink control information (SCI) including the interference assistance information and the second MCS to the second wireless communication device.

[0214] Example 8: The method of Example 6, wherein transmitting the interference assistance information further comprises: transmitting the interference assistance information separately from the sidelink control information including the second MCS to the second wireless communication device.

[0215] Example 9: A method as described in any of Examples 5 to 8, wherein receiving the grant further includes: receiving downlink control information including at least the grant, a second MCS, and a power splitting factor.

[0216] Example 10: The method as described in any one of Examples 1 to 9 further includes: transmitting a capability indication to the base station indicating the capability of the first wireless communication device to perform the superimposed transmission.

[0217] Example 11: The method as described in any one of Examples 1 to 10 further includes: transmitting a scheduling request to the base station requesting the grant for the superimposed transmission.

[0218] Example 12: The method of Example 11, wherein transmitting the scheduling request further comprises: transmitting the scheduling request including at least one of a sidelink packet priority, a buffer status report, or a sidelink quality of the sidelink signal.

[0219] Example 13: The method as described in Example 12 further includes: measuring an average side link path loss associated with the second link within a time window, wherein the side link quality includes the average side link path loss.

[0220] Example 14: A method as described in any of Examples 1 to 13, wherein the side link signal includes a broadcast side link signal broadcast to multiple side link devices including the second wireless communication device.

[0221] Example 15: A method for performing sidelink wireless communications at a first wireless communication device, the method comprising: communicating with a base station via a first link and communicating with a second wireless communication device via a second link on a common carrier shared between the first link and the second link; receiving a superimposed transmission from the second wireless communication device, the superimposed transmission comprising a base layer corresponding to an uplink signal transmitted from the second wireless communication device to the base station and an enhancement layer corresponding to a sidelink signal transmitted from the second wireless communication device to the first wireless communication device; receiving interference assistance information associated with the base layer from the second wireless communication device; and utilizing the interference assistance information to eliminate the base layer from the superimposed transmission to obtain the enhancement layer comprising the sidelink signal.

[0222] Example 16: A method as described in Example 15, wherein receiving the interference assistance information further includes: receiving the interference assistance information including a first modulation and coding scheme (MCS) of the uplink signal and a power division factor, the power division factor indicating a first power of the base layer including the uplink signal and a second power of the enhancement layer including the side link signal.

[0223] Example 17: A method as described in Example 16, wherein receiving the interference assistance information further includes: receiving side link control information (SCI) of a second MCS of the side link signal including the interference assistance information and the side link signal from a second wireless communication device.

[0224] Example 18: The method of Example 16, wherein receiving the interference assistance information further comprises: receiving the interference assistance information separately from sidelink control information including a second MCS of the sidelink signal from a second wireless communication device.

[0225] Example 19: A method for performing wireless communications at a base station, the method comprising: communicating with a first wireless communication device via a first link on a common carrier shared between the first link and the second link, the first wireless communication device further communicating with a second wireless communication device on the second link; transmitting a grant to the first wireless communication device, the grant including an indication of resources on the common carrier for superimposed transmission, the superimposed transmission including a base layer corresponding to an uplink signal to be transmitted from the first wireless communication device to the base station and an enhancement layer corresponding to a side link signal to be transmitted from the first wireless communication device to at least a second wireless communication device; and receiving the base layer of the superimposed transmission including the uplink signal from the first wireless communication device.

[0226] Example 20: The method as described in Example 19 further includes: transmitting to the first wireless communication device a power division factor to be used by the first wireless communication device when dividing the total power budget of the first wireless communication device between the first power of the base layer and the second power of the enhancement layer.

[0227] Example 21: The method of Example 20, wherein receiving the base layer of the superimposed transmission further comprises: receiving the base layer generated by the first wireless communication device at a first power.

[0228] Example 22: The method as described in Example 20 or 21 further includes: transmitting a closed-loop power control parameter and an open-loop power control parameter for the superimposed transmission to the first wireless communication device for use by the first wireless communication device in determining the total power budget.

[0229] Example 23: The method as described in any one of Examples 20 to 22 further includes: determining a first minimum power of the uplink signal at which the uplink signal can be decoded by the base station based on the uplink quality; determining a second minimum power of the side link signal at which the side link signal can be decoded by the second wireless communication device based on the side link quality; and identifying the power division factor based on the first minimum power and the second minimum power.

[0230] Example 24: The method as described in Example 23 further includes: receiving the uplink quality including the first path loss of the first link from the first wireless communication device; and receiving the side link quality including the second path loss associated with at least the second link from the first wireless communication device.

[0231] Example 25: The method as described in Example 24 further includes: receiving a scheduling request from the first wireless communication device requesting the grant for the superimposed transmission, wherein the scheduling request further includes the side link quality.

[0232] Example 26: The method of Example 25, wherein the scheduling request further comprises at least one of: a side link packet priority of the side link signal, or a buffer status report.

[0233] Example 27: The method as described in any of Examples 20 to 26 further includes: transmitting a first modulation and coding scheme (MCS) associated with the uplink signal and a second MCS associated with the sidelink signal to the first wireless communication device.

[0234] Example 28: The method of Example 27, wherein transmitting the grant further comprises: transmitting downlink control information including at least the grant, the second MCS, and the power splitting factor.

[0235] Example 29: The method as described in any of Examples 19 to 28 further includes: receiving a capability indication from the first wireless communication device indicating the ability of the first wireless communication device to perform the overlay transmission.

[0236] Example 30: A first side-link device in a wireless communication network comprises: a wireless transceiver, a memory, and a processor coupled to the transceiver and the memory, the processor and the memory being configured to perform a method as described in any one of Examples 1 to 18.

[0237] Example 31: A first side link device in a wireless communication network, comprising: at least one device for performing a method as described in any one of Examples 1 to 18.

[0238] Example 32: An article of manufacture for use with a first side-link device in a wireless communication network, comprising a non-transitory computer-readable medium having instructions stored therein, the instructions executable by one or more processors of the first side-link device to perform a method as described in any of Examples 1 to 18.

[0239] Example 33: A base station in a wireless communication network, comprising: a wireless transceiver, a memory, and a processor coupled to the transceiver and the memory, the processor and the memory being configured to perform a method as described in any one of Examples 19 to 29.

[0240] Example 34: A base station in a wireless communication network, comprising: at least one device for performing a method as described in any one of Examples 19 to 29.

[0241] Example 35: An article for use with a base station in a wireless communication network, comprising a non-transitory computer-readable medium having instructions stored therein, the instructions being executable by one or more processors of the base station to perform a method as described in any of Examples 19 to 29.

[0242] Several aspects of wireless communication networks have been presented with reference to exemplary implementations. As those skilled in the art will readily appreciate, the various aspects described throughout this disclosure may be extended to other telecommunication systems, network architectures and communication standards.

[0243] As an example, various aspects may be implemented within 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 within 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 standard, network architecture, and / or communication standard employed will depend on the specific application and the overall design constraints imposed on the system.

[0244] Within the present disclosure, the wording "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 superior or superior to other aspects of the present disclosure. Likewise, the term "aspect" does not require that all aspects of the present disclosure include the features, advantages, or modes of operation discussed. 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 to be 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 directly contacts the second object physically. The terms "circuit" and "circuitry" are used broadly and are intended to include both hardware implementations of electronic devices and conductors and software implementations of information and instructions, which, when connected and configured, enable the functions described in the present disclosure to be performed without limitation on the type of electronic circuits, which, when executed by a processor, enable the functions described in the present disclosure to be performed.

[0245] Figure 1-17 One or more of the components, steps, features, and / or functions described herein may be rearranged and / or combined into a single component, step, feature, or function, or implemented in several components, steps, or functions. Additional elements, components, steps, and / or functions may also be added without departing from the novel features disclosed herein. Figure 1 , 2, 4, 5 and 7-10, the equipment, devices and / or components illustrated may be configured to perform one or more of the methods, features, or steps described herein. The novel algorithms described herein may also be efficiently implemented in software and / or embedded in hardware.

[0246] It should be understood that the specific order or hierarchy of steps in the disclosed methods is an illustration of an exemplary process. Based on design preferences, it should be understood that the specific order or hierarchy of steps in these methods can be rearranged. The attached method claims present elements of the various steps in a sample order and are not meant to be limited to the specific order or hierarchy presented unless specifically stated herein.

[0247] 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 readily apparent to those skilled in the art, and the universal principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the various aspects shown herein, but should be granted the full scope consistent with the language of the claims, wherein the singular reference to the element is not intended to mean "there is and only one" - unless specifically stated, but intended to mean "one or more". Unless specifically stated otherwise, the term "some / some" refers to one or more. The phrase "at least one of" a list of items refers to any combination of these 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. The elements of the various aspects described throughout this disclosure are all structurally and functionally equivalent solutions currently or hereafter known to those of ordinary skill in the art, and are expressly incorporated herein by reference, and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be donated to the public, regardless of whether such disclosure is explicitly recorded in the claims.

Claims

1. A method for performing sidelink wireless communication at a first wireless communication device, the method comprising: communicating with a base station via the first link and communicating with a second wireless communication device via the second link over a common carrier shared between the first link and the second link; receiving a grant from the base station, the grant comprising an indication of resources on the common carrier for an overlay transmission comprising a base layer corresponding to an uplink signal to be transmitted to the base station and an enhancement layer corresponding to a sidelink signal to be transmitted to at least the second wireless communication device, wherein the grant is included in downlink control information (DCI) received from the base station; transmitting interference assistance information associated with the base layer to the second wireless communication device, the interference assistance information comprising a first modulation and coding scheme for the uplink signal, wherein the first modulation and coding scheme is included in the DCI; and The superimposed transmission including the base layer and the enhancement layer is transmitted to the base station and the second wireless communication device based on a power splitting factor included in the DCI.

2. The method of claim 1, further comprising: determining a total power budget for the superimposed transmission; as well as The power split factor is applied to the total power budget to generate the base layer at a first power and the enhancement layer at a second power.

3. The method of claim 2, wherein applying the power split factor further comprises: multiplying the power split factor by the total power budget to determine the first power at which the base layer is to be generated; as well as The total power budget is multiplied by the difference between 1 and the power split factor to determine the second power at which the enhancement layer is to be generated.

4. The method of claim 2, further comprising: receiving a closed-loop power control parameter and an open-loop power control parameter for the superimposed transmission, wherein at least one of the open-loop power control parameters comprises an updated open-loop power control parameter updated for the superimposed transmission; and The total power budget is determined based on the closed-loop power control parameter and the open-loop power control parameter.

5. The method of claim 2, further comprising: receiving from the base station a second modulation and coding scheme associated with the sidelink signal; generating the uplink signal at the first power using the first modulation and coding scheme to produce the base layer; generating the sidelink signal at the second power using the second modulation and coding scheme to produce the enhancement layer; as well as The enhancement layer is superimposed on the base layer to produce the superimposed transmission.

6. The method of claim 5, wherein transmitting the interference assistance information further comprises: The interference assistance information including the first modulation and coding scheme and the power splitting factor is transmitted to the second wireless communication device.

7. The method of claim 6, wherein transmitting the interference assistance information further comprises: Sidelink control information (SCI) including the interference assistance information and the second modulation and coding scheme is transmitted to the second wireless communication device.

8. The method of claim 6, wherein transmitting the interference assistance information further comprises: The interference assistance information is transmitted to the second wireless communication device separately from sidelink control information including the second modulation and coding scheme.

9. The method of claim 5, wherein the second modulation and coding scheme is included in the DCI.

10. The method of claim 1, further comprising: A capability indication is transmitted to the base station indicating a capability of the first wireless communication device to perform the superimposed transmission.

11. The method of claim 1, further comprising: A scheduling request is transmitted to the base station requesting the grant for the superimposed transmission.

12. The method of claim 11, wherein transmitting the scheduling request further comprises: The scheduling request including at least one of a sidelink packet priority, a buffer status report, or a sidelink quality of the sidelink signal is transmitted.

13. The method of claim 12, further comprising: An average side link path loss associated with the second link over a time window is measured, wherein the side link quality comprises the average side link path loss.

14. The method of claim 1, wherein the sidelink signal comprises a broadcast sidelink signal broadcast to a plurality of sidelink devices including the second wireless communication device.

15. A first wireless communication device in a wireless communication network, comprising: Wireless transceiver; Memory; as well as a processor communicatively coupled to the wireless transceiver and the memory, wherein the processor is configured to: communicating with a base station over the first link and with a second wireless communication device over the second link via the wireless transceiver on a common carrier shared between the first link and the second link; receiving a grant from the base station, the grant comprising an indication of resources on the common carrier for an overlay transmission comprising a base layer corresponding to an uplink signal to be transmitted to the base station and an enhancement layer corresponding to a sidelink signal to be transmitted to at least the second wireless communication device, wherein the grant is included in downlink control information (DCI) received from the base station; transmitting, via the wireless transceiver, interference assistance information associated with the base layer to the second wireless communication device, the interference assistance information comprising a first modulation and coding scheme for the uplink signal, wherein the first modulation and coding scheme is included in the DCI; as well as The superimposed transmission including the base layer and the enhancement layer is transmitted to the base station and the second wireless communication device via the wireless transceiver based on a power splitting factor included in the DCI.

16. The first wireless communication device of claim 15, wherein the processor is further configured to perform the method of any one of claims 2-14.

17. A first wireless communication device in a wireless communication network, comprising: means for communicating with a base station via a first link and communicating with a second wireless communication device via the second link over a common carrier shared between the first link and the second link; means for receiving a grant from the base station, the grant comprising an indication of resources on the common carrier for an overlay transmission comprising a base layer corresponding to an uplink signal to be transmitted to the base station and an enhancement layer corresponding to a sidelink signal to be transmitted to at least the second wireless communication device, wherein the grant is included in downlink control information (DCI) received from the base station; means for transmitting interference assistance information associated with the base layer to the second wireless communication device, the interference assistance information comprising a first modulation and coding scheme for the uplink signal, wherein the first modulation and coding scheme is included in the DCI; as well as means for transmitting the superimposed transmission comprising the base layer and the enhancement layer to the base station and the second wireless communication device based on a power splitting factor included in the DCI.

18. The first wireless communication device of claim 17, further comprising: means for determining a total power budget for said superimposed transmission; as well as Means for applying the power split factor to the total power budget to generate the base layer at a first power and the enhancement layer at a second power.

19. The first wireless communication device of claim 18, wherein the means for applying the power splitting factor further comprises: means for multiplying the power split factor by the total power budget to determine the first power at which the base layer is to be generated; as well as Means for multiplying the total power budget by a difference between 1 and the power split factor to determine the second power at which to generate the enhancement layer.

20. The first wireless communication device of claim 18, further comprising: means for receiving a closed-loop power control parameter and an open-loop power control parameter for the superimposed transmission, wherein at least one of the open-loop power control parameters comprises an updated open-loop power control parameter updated for the superimposed transmission; as well as means for determining the total power budget based on the closed-loop power control parameter and the open-loop power control parameter.

21. The first wireless communication device of claim 18, further comprising: means for receiving from the base station a second modulation and coding scheme associated with the sidelink signal; means for generating the uplink signal at the first power using the first modulation and coding scheme to produce the base layer; means for generating the sidelink signal at the second power using the second modulation and coding scheme to produce the enhancement layer; as well as means for superimposing said enhancement layer on said base layer to produce said superimposed transmission.

22. The first wireless communication device of claim 21, wherein the means for transmitting the interference assistance information further comprises: means for transmitting the interference assistance information comprising the first modulation and coding scheme and the power splitting factor to the second wireless communication device.

23. The first wireless communication device of claim 22, wherein the means for transmitting the interference assistance information further comprises: means for transmitting sidelink control information (SCI) including the interference assistance information and the second modulation and coding scheme to the second wireless communication device.

24. The first wireless communication device of claim 22, wherein the means for transmitting the interference assistance information further comprises: means for transmitting the interference assistance information to the second wireless communication device separately from sidelink control information comprising the second modulation and coding scheme.

25. The first wireless communication device of claim 21, wherein the second modulation and coding scheme is included within the DCI.

26. The first wireless communication device of claim 17, further comprising: means for transmitting to the base station a capability indication indicating a capability of the first wireless communication device to perform the superimposed transmission.

27. The first wireless communication device of claim 17, further comprising: Means for transmitting, to the base station, a scheduling request requesting the grant for the superimposed transmission.

28. The first wireless communication device of claim 27, wherein the means for transmitting the scheduling request further comprises: Means for transmitting the scheduling request including at least one of a sidelink packet priority, a buffer status report, or a sidelink quality of the sidelink signal.

29. The first wireless communication device of claim 28, further comprising: means for measuring an average side link path loss associated with the second link over a time window, wherein the side link quality comprises the average side link path loss.

30. The first wireless communication device of claim 17, wherein the sidelink signal comprises a broadcast sidelink signal broadcast to a plurality of sidelink devices including the second wireless communication device.

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