Facilitates device-to-device communication

Abstract

The wireless communication device is suitable for facilitating power saving and sidelink communication. According to one example, a wireless communication device can send a reservation signal to reserve one or more sidelink resources for use by another device, and receive a sidelink transmission from the other device on at least a portion of the reserved one or more sidelink resources. According to another example, a wireless communication device can detect a reservation signal from another device, wherein the reservation signal is configured to reserve one or more sidelink resources, and the wireless communication device can send a sidelink transmission on at least a portion of the one or more sidelink resources reserved by the other device. Other aspects, embodiments, and features may also be included.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefits of non-provisional patent application no. 17 / 127,912 filed in the U.S. Patent and Trademark Office on December 18, 2020, and provisional patent application no. 62 / 951,885 filed in the U.S. Patent and Trademark Office on December 20, 2019, and the entire contents of the above-mentioned patent applications are incorporated herein by reference, as if the full text of these patent applications were fully set forth below, for all applicable purposes. Technical Field

[0003] The techniques discussed below relate generally to wireless communication systems and, more particularly, to facilitating device-to-device communications. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, etc. These systems can be accessed by various types of devices adapted to facilitate wireless communications, wherein multiple devices share the available system resources (e.g., time, frequency, and power).

[0005] Fifth generation (5G) New Radio (NR) networks may exhibit a higher degree of flexibility and scalability than fourth generation (4G) Long Term Evolution (LTE) networks, and are designed to support a very diverse set of requirements. Techniques for reducing power consumption, improving battery life, and facilitating device-to-device communications applicable to such 5G NR networks may be desirable. Summary of the invention

[0006] The following will introduce a summary of one or more aspects of the present disclosure to provide a basic understanding of such aspects. This summary is not an extensive overview of all conceivable features of the present disclosure, and is neither intended to identify key or important elements of all aspects of the present disclosure, nor is it intended to delimit the scope of any or all aspects of the present disclosure. Its sole purpose is to introduce some concepts of one or more aspects of the present disclosure as a prelude to the more detailed description introduced later.

[0007] Various examples and embodiments of the present disclosure will promote device-to-device communication and a reduction in power consumption in wireless communication devices operating in a wireless communication system. In at least one aspect of the present disclosure, a wireless communication device is provided. In at least one example, a wireless communication device may include a transceiver and a processing circuit coupled to the transceiver. The processing circuit may be configured to send a reservation signal through the transceiver to reserve one or more sidelink resources for use by another device, and to receive a sidelink transmission from the other device through the transceiver on at least a portion of the reserved one or more sidelink resources.

[0008] In at least one example, a wireless communication device may include a transceiver and a processing circuit coupled to the transceiver. The processing circuit may be configured to: detect a reservation signal from another device via the transceiver, wherein the reservation signal is configured to reserve one or more sidelink resources; and send a sidelink transmission via the transceiver on at least a portion of the one or more sidelink resources reserved by the other device.

[0009] Other aspects provide wireless communication methods and / or devices for wireless communication including means for performing such methods. One or more examples of such methods may include: sending a reservation signal to reserve one or more sidelink resources for use by another device; and receiving a sidelink transmission from the other device on at least a portion of the reserved one or more sidelink resources.

[0010] One or more other examples of such a method may include: detecting a reservation signal from another device, wherein the reservation signal is configured to reserve one or more sidelink resources; and sending a sidelink transmission on the one or more sidelink resources reserved by the other device.

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

[0012] Figure 1 is a schematic diagram illustrating an example of a wireless communication system according to one or more embodiments.

[0013] Figure 2 is a conceptual diagram illustrating an example of a wireless access network according to some embodiments.

[0014] Figure 3 is a diagram illustrating an example of a wireless communication network employing sidelink communications in accordance with some aspects.

[0015] Figure 4 is a schematic diagram showing the organization of radio resources in an air interface utilizing Orthogonal Frequency Division Multiplexing (OFDM).

[0016] Figure 5 is a flow diagram illustrating communication between two UEs, including at least one power sensitive UE, according to one or more embodiments.

[0017] Figure 6 is a flow chart depicting communications between two UEs, UE-A and UE-B, according to some embodiments, wherein UE-A is a power sensitive device and UE-B is not a power sensitive device.

[0018] Figure 7 is a flow chart depicting communications between UE-A and UE-B according to some embodiments, wherein UE-B is a power sensitive device and UE-A is not a power sensitive device.

[0019] Figure 8 is a block diagram illustrating selected components of a wireless communication device employing a processing system according to at least one example of the present disclosure.

[0020] Fig. 9 A flow chart illustrating a method of wireless communication (eg, which may be operable on or via a communication device) in accordance with some embodiments is shown.

[0021] Fig.10 A flow chart illustrating a method of wireless communication (eg, which may be operable on or via a communication device) in accordance with some embodiments is shown. DETAILED DESCRIPTION

[0022] The detailed description of the embodiments described below in connection with the accompanying drawings is intended to describe various configurations and is not intended to represent the only configurations that can practice the concepts described herein. 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 can be practiced without these specific details. In some cases, well-known structures and components are shown in the form of block diagrams to avoid obscuring such concepts.

[0023] Although various aspects and embodiments are described in this application by illustrating some examples, it will be understood by those skilled in the art that other implementations and use cases may occur in many different arrangements and scenarios. The innovation described herein may be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, various embodiments and / or uses may be thought of through integrated chip embodiments and other devices based on non-module components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / shopping devices, medical devices, AI-enabled devices, etc.). Although some examples may specifically relate to or not specifically relate to some use cases or applications, there may be a wide range of diverse applicability for the described innovation. The implementation may vary from chip-level or module components to non-module, non-chip-level implementations, to collective, distributed, or OEM devices or systems (all of which combine one or more aspects of the described innovations), and in some practical settings, the device combining the described aspects and features may also have to include additional components and features to implement and practice the described embodiments claimed for protection. For example, the transmission and reception of wireless signals must include many components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.). It is intended to show that the innovations described herein may be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc., of varying sizes, shapes, and configurations.

[0024] The various concepts presented throughout this disclosure may be implemented across a wide variety of telecommunication systems, network architectures, and communication standards. Figure 1 , by way of illustrative example and not limitation, various aspects of the present disclosure are illustrated with reference to a wireless communication system 100. The wireless communication system 100 includes three interacting domains: a core network 102, a radio access network (RAN) 104, and a user equipment (UE) 106. By means of the wireless communication system 100, the UE 106 may be enabled to conduct data communications with an external data network 110 (such as, but not limited to, the Internet).

[0025] The RAN 104 may implement any suitable wireless communication technology(s) to provide radio access for the UE 106. As an example, the RAN 104 may operate in accordance with the 3rd Generation Partnership Project (3GPP) New Radio (NR) technical specifications, which are often referred to as 5G. As another example, the RAN 104 may operate in accordance with a hybrid of the 5G NR standard and the Evolved Universal Terrestrial Radio Access Network (eUTRAN) standard, which is often referred to as LTE. 3GPP refers to such a hybrid RAN as the Next Generation RAN or NG-RAN. Of course, many other examples may be employed within the scope of the present disclosure.

[0026] As shown, RAN 104 includes multiple base stations 108. In a broad sense, a base station is a network element in a wireless access network that is responsible for radio transmission and reception to or from a UE in one or more cells. In different technologies, standards or contexts, a base station may be referred to as a basic transceiver station (BTS), a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), an access point (AP), a Node B (NB), an eNode B (eNB), a gNode B (gNB), a transmission and reception point (TRP) or some other appropriate title by those skilled in the art. In some examples, a base station may include two or more TRPs of co-location or non-co-location. Each TRP may communicate on the same or different carrier frequencies in the same or different frequency bands.

[0027] The radio access network 104 is also illustrated as supporting wireless communications for multiple mobile devices. A mobile device may refer to a user equipment (UE) in the 3GPP standard, but may also be referred to as a mobile station (MS), a user station, a mobile unit, a user unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile user station, an access terminal (AT), a mobile terminal, a wireless terminal, a remote terminal, a mobile phone, a terminal, a user agent, a mobile client, a client, or some other appropriate terminology by those skilled in the art. A UE may be a device that provides a user with access to network services.

[0028] In this document, a "mobile" device does not necessarily have the ability to move and can be fixed. The term "mobile device" or "mobile device" refers to a wide variety of devices and technologies. A UE may include a number of hardware structural parts that are set in size, shape, and arrangement to facilitate communication; such components may include antennas, antenna arrays, RF chains, amplifiers, and one or more processors that are electrically coupled to each other. For example, some non-limiting examples of mobile devices include mobile phones, cellular phones, smart phones, session initiation protocol (SIP) phones, laptops, personal computers (PCs), notebook computers, netbook computers, tablet computers, personal digital assistants (PDAs), and a wide range of embedded systems (e.g., corresponding to the "Internet of Things" (IoT)). In addition, a mobile device may be a car or a vehicle, a remote sensor or actuator, a robot or a robotic device, a satellite radio, a global positioning system (GPS) device, an object tracking device, a drone, a multi-rotor 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 video player (e.g., an MP3 player), a camera, a game console, etc. In addition, the mobile device may also be a digital home or smart home device, such as a home audio, video and / or multimedia device, an appliance, a vending machine, smart lighting, a home security system, a smart meter, etc. In addition, the mobile device may also be a smart energy device, a security device, a solar panel or solar array, a municipal infrastructure device that controls electrical energy (e.g., a smart grid), lighting, water, etc., an industrial automation and enterprise device, a logistics controller, an agricultural device, etc. In addition, the mobile device may also provide wired medical or telemedicine support, such as telehealth. Telehealth devices may include telehealth monitoring devices and telehealth management devices, and communications of these devices may be given priority or prioritized access relative to other types of information, for example, in terms of prioritized access to the transmission of critical service data and / or the associated QoS of the transmission of critical service data.

[0029] The wireless communications between the RAN 104 and the UE 106 may be described in terms of an air interface. Transmissions over the air interface from a base station (e.g., base station 108) to one or more UEs (e.g., UE 106) may be referred to as downlink (DL) transmissions. According to certain aspects of the present disclosure, the term downlink may refer to point-to-multipoint transmissions originating from a scheduling entity (described further below; e.g., base station 108). Another way to describe this scheme may be to use the term "broadcast channel multiplexing." Transmissions from a UE (e.g., UE 106) to a base station (e.g., base station 108) may be referred to as uplink (UL) transmissions. According to other aspects of the present disclosure, the term uplink may refer to point-to-point transmissions originating from a scheduled entity (described further below; e.g., UE 106).

[0030] In some examples, access to the air interface may be scheduled, wherein a scheduling entity (e.g., a base station 108) allocates resources for communications between some or all devices and equipment within its service area or cell. Within the present disclosure, as further discussed below, the scheduling entity may be responsible for scheduling, allocating, reconfiguring, and releasing resources for one or more scheduled entities. That is, a UE 106, which may be a scheduled entity, may utilize resources allocated by the scheduling entity 108 for scheduled communications.

[0031] Base station 108 is not the only entity that functions as a scheduling entity. That is, in some examples, a UE may function as a scheduling entity, scheduling resources for one or more scheduled entities (eg, one or more other UEs).

[0032] like Figure 1 As shown in , the scheduling entity 108 can broadcast downlink traffic 112 to one or more scheduled entities 106. In a broad sense, the scheduling entity 108 is a node or device responsible for scheduling traffic in the wireless communication network, which includes downlink traffic 112 and, in some examples, uplink traffic 116 from one or more scheduled entities 106 to the scheduling entity 108. On the other hand, the scheduled entity 106 is a node or device that receives downlink control information 114 from another entity in the wireless communication network (e.g., the scheduling entity 108), which includes but is not limited to scheduling information (e.g., grants), synchronization or timing information, or other control information.

[0033] In general, the base stations 108 may include a backhaul interface for communicating with a backhaul portion 120 of the wireless communication system. The backhaul 120 may provide a link between the base stations 108 and the core network 102. Additionally, in some examples, a backhaul network may provide interconnections between the respective base stations 108. Various types of backhaul interfaces may be employed, such as a direct physical connection using any suitable transport network or a virtual network.

[0034] The core network 102 may be part of the wireless communication system 100 and may be independent of the radio access technology used in the RAN 104. In some examples, the core network 102 may be configured according to a 5G standard (e.g., 5GC). In other examples, the core network 102 may be configured according to a 4G Evolved Packet Core (EPC) or any other appropriate standard or configuration.

[0035] In some examples, scheduled entities (e.g., a first scheduled entity 106 and a second scheduled entity 107) may utilize sidelink signals for direct device-to-device (D2D) communication. The sidelink signals may include sidelink traffic 122 and sidelink control 124. In some examples, the sidelink control information 124 may include a request signal (e.g., a request to send (RTS)), a source transmission signal (STS), and / or a direction selection signal (DSS). The request signal may be provided to the scheduled entity 106 to request a certain duration to maintain a sidelink channel available for the sidelink signal. The sidelink control information 124 may further include a response signal, such as a clear to send (CTS) and / or a destination receive signal (DRS). The response signal may be provided to the scheduled entity 106 to indicate to it the availability of the sidelink channel, for example, for the requested duration. The exchange of request and response signals (eg, a handshake) may enable different scheduled entities performing sidelink communications to negotiate the availability of a sidelink channel and then communicate sidelink traffic information 122 .

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

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

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

[0039] Figure 2 Further included is a quadrotor or drone 220, which can be configured to act as a base station. That is, in some examples, the cell may not necessarily be fixed, and the geographic area of ​​the cell may move according to the location of the mobile base station (e.g., quadrotor 220).

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

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

[0042] In another aspect of the RAN 200, as described above with reference to Figure 1 As noted, sidelink signals may be used between UEs without necessarily having to rely on communication with a base station. For example, two or more UEs (e.g., UEs 226 and 228) may communicate with each other using peer-to-peer (P2P) or sidelink signals 227 without relaying the communication through a base station (e.g., base station 212). In another example, UE 238 is shown communicating with UEs 240 and 242. Here, UE 238 may act as a scheduling entity or a primary sidelink device, and UEs 240 and 242 may act as scheduled entities or non-primary (e.g., secondary) sidelink devices. In yet another example, a UE may act as a scheduling entity in a D2D, peer-to-peer (P2P) or vehicle-to-vehicle (V2V) network, a vehicle-to-everything (V2X), a mesh network, or other appropriate direct link network. In the mesh network example, UEs 240 and 242 may optionally communicate directly with each other in addition to communicating with the scheduling entity 238. Thus, in a wireless communication system with scheduled access to time-frequency resources and having a cellular configuration, a P2P / D2D configuration, or a mesh configuration, a scheduling entity and one or more scheduled entities may communicate using the scheduled resources.

[0043] The two main technologies that V2X networks can use include dedicated short-range communications (DSRC) based on the IEEE 802.11p standard and cellular V2X based on LTE and / or 5G (New Radio) standards. Various aspects of the present disclosure may be directed to New Radio (NR) cellular V2X networks, which for simplicity will be referred to herein as V2X networks. However, it should be understood that the concepts disclosed herein may not be limited to a specific V2X standard or may be directed to sidelink networks other than V2X networks.

[0044] Figure 3 An example of a wireless communication network 300 configured to support D2D or sidelink communications is shown. In some examples, the sidelink communications may include V2X communications. V2X communications involve not only wireless information exchange directly between the vehicles themselves (e.g., vehicles 302 and 304), but also wireless information exchange directly between vehicles 302 / 304 and infrastructure (e.g., roadside units (RSUs) 306) such as street lights, buildings, traffic cameras, roadside toll booths, or other fixed objects, between vehicles 302 / 304 and pedestrians 308, and between vehicles 302 / 304 and wireless communication networks (e.g., base stations 310). In some examples, V2X communications may be implemented in accordance with Release 16 of the New Radio (NR) cellular V2X standard defined by 3GPP or other appropriate standards.

[0045] V2X communications enable vehicles 302 and 304 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 enhance the vehicle driving experience and improve vehicle safety. For example, such V2X data can allow for autonomous driving and improve road safety and traffic efficiency. For example, the exchanged V2X data can be used by V2X-connected vehicles 302 and 304 to provide in-vehicle collision warnings, road hazard warnings, approaching emergency service vehicle warnings, pre- / post-impact warnings and information, emergency braking warnings, advance warnings of traffic jams, lane change warnings, smart navigation services, and other similar information. In addition, V2X data received by the V2X-connected mobile device of pedestrians / cyclists 308 can be used to trigger alarm sounds, vibrations, flashing lights, etc. in the event of an imminent danger.

[0046] Sidelink communications between vehicle UEs (V-UEs) 302 and 304 or between a V-UE 302 or 304 and an RSU 3206 or a pedestrian UE (P-UE) 308 may occur via a sidelink 312 using a ProSe (ProSe) PC5 interface. Among the various aspects of the present disclosure, the PC5 interface may also be used to support D2D sidelink 312 communications in other short-range use cases. Examples of other short-range use cases may include public safety or business-based (e.g., entertainment, education, office, medical, and / or interactive) short-range services. Figure 3 In the example shown, ProSe communication may also occur between UEs 314 and 316 .

[0047] ProSe communication may support different operation scenarios, such as in-coverage, out-of-coverage, and partial coverage. Out-of-coverage refers to a scenario in which UEs (e.g., V-UEs 302 and 304 and P-UE 3208) are outside the coverage area of ​​a base station (e.g., base station 310) but each is still configured for ProSe communication. Partial coverage refers to a scenario in which some of the UEs (e.g., V-UE 304) are outside the coverage area of ​​the base station 310 while other UEs (e.g., V-UE 302 and P-UE 308) communicate with the base station 310. In-coverage refers to a scenario in which UEs (e.g., UEs 314 and 316) communicate with the base station 310 (e.g., gNB) via a Uu (e.g., cellular interface) connection to receive ProSe service authorization and provisioning information that supports ProSe operation.

[0048] In order to facilitate D2D sidelink communication between (e.g.) UE 314 and 316 via sidelink 312, UE 314 and 316 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), that facilitates device discovery and enables communication synchronization on sidelink 312. For example, the discovery signal may be used by UE 316 to measure the signal strength and channel state of a potential sidelink (e.g., sidelink 312) with another UE (e.g., UE 314). UE 316 may use the measurement results to select a UE (e.g., UE 314) for sidelink communication or relay communication.

[0049] In a 5G NR sidelink, sidelink communications may employ a transmit or receive resource pool. For example, the minimum resource allocation unit in frequency may be a subchannel (e.g., which may include 10, 15, 20, 25, 50, 75, or 100 consecutive resource blocks), and the minimum resource allocation unit in time may be a time slot. A radio resource control (RRC) configuration of the resource pool may be either pre-configured (e.g., a factory setting for the UE determined according to, for example, a sidelink standard or technical specification) or configured by a base station (e.g., base station 310).

[0050] In addition, there may be two main resource allocation operation modes for sidelink (e.g., PC5) communications. In the first mode (i.e., Mode 1), the base station (e.g., gNB) 310 may allocate resources for sidelink communications between sidelink devices (e.g., V2X devices or other sidelink devices) in various ways. For example, the base station 310 may dynamically allocate sidelink resources (e.g., dynamic grants) to the sidelink devices in response to requests for sidelink resources from the sidelink devices. The base station 310 may also activate pre-configured sidelink grants (e.g., configured grants) for sidelink communications between sidelink devices. In Mode 1, sidelink feedback may be reported back to the base station 310 by the transmitting sidelink device.

[0051] In the second mode (Mode 2), the sidelink devices may autonomously select sidelink resources for sidelink communications therebetween. 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 312 may be the same between the two modes. Thus, from the perspective of the receiver, there is no difference between the two modes.

[0052] Reference Figure 4 Various aspects of the present disclosure are described with reference to the OFDM waveforms schematically shown in FIG. Those skilled in the art will appreciate that various aspects of the present disclosure may be applied to SC-FDMA waveforms in substantially the same manner as described below. That is, although some examples of the present disclosure may focus on OFDM links for clarity, it should be appreciated that the same principles may also be applied to SC-FDMA waveforms.

[0053] Reference now Figure 4 , which shows a zoomed-in view of an exemplary DL subframe 402 showing an OFDM resource grid 404. However, those skilled in the art will readily recognize that the PHY transmission structure for any particular application may vary relative to 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 or tones.

[0054] Resource grid 404 can be used to schematically represent the time-frequency resources of a given antenna port. That is, in a multiple input multiple output (MIMO) implementation with multiple antenna ports available, there may be corresponding multiple resource grids 404 available for communication. Resource grid 404 can be divided into multiple resource elements (REs) 406. 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 adopted in a specific implementation, each RE can represent one or more bits of information. In some examples, a block consisting of REs can be referred to as a physical resource block (PRB) or more simply a resource block (RB) 408, which contains any appropriate number of consecutive subcarriers in the frequency domain. In one example, an RB can include 12 subcarriers, which is a number independent of the numerology used. In some examples, depending on the numerical parameters adopted, an RB can contain any appropriate number of consecutive OFDM symbols in the time domain. Within the present disclosure, it is assumed that a single RB (e.g., RB 408) corresponds entirely to communication in a single direction (either sending or receiving for a given device).

[0055] 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 generally employs only a subset of the resource grid 304. In some examples, an RB may be the smallest unit of resources that can 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. These RBs may be scheduled by a base station (e.g., gNB, eNB, etc.), or may be scheduled by the UE / sidelink device implementing the D2D sidelink communication itself.

[0056] In this illustration, RB 408 is shown as not occupying the entire bandwidth of subframe 402, and some subcarriers are shown above and below RB 408. In a given embodiment, subframe 402 may have a bandwidth corresponding to any number of one or more RBs 408. Furthermore, in this illustration, RB 408 is shown as not occupying the entire duration of subframe 402, but this is just one possible example.

[0057] Each subframe 402 (eg, a 1 ms subframe) may be composed of one or more adjacent time slots. Figure 4In the example shown, a subframe 402 includes four time slots 410, which is an illustrative example. In some examples, time slots can be defined according to a specified number of OFDM symbols with a given cyclic prefix (CP) length. For example, a time slot can include 7 or 14 OFDM symbols with a nominal CP. Other examples may include micro-time slots (e.g., 1, 2, 4, or 7 OFDM symbols) with a shorter duration. These micro-time slots may be resources that occupy ongoing time slot transmission scheduling for the same UE or different UEs for transmission in some cases.

[0058] The enlarged view of one of the time slots 410 shows the time slot 410 including a control region 412 and a data region 414. In general, the control region 412 may carry a control channel (e.g., PDCCH), and the data region 414 may carry a data channel (e.g., PDSCH or PUSCH). Of course, a time slot may contain all DL, all UL, or at least one DL portion and at least one UL portion. Figure 4 The illustrated simple structure is merely exemplary in nature, and different time slot structures may be employed, and may include one or more of each of the control region and the data region.

[0059] although Figure 4 Although not shown in the figure, each RE 406 within the RB 408 may be scheduled to carry one or more physical channels, including a control channel, a shared channel, a data channel, etc. Other REs 406 within the RB 408 may also carry preambles or reference signals. These preambles or reference signals may be provided for a receiving device to perform channel estimation for the corresponding channel, which may enable coherent demodulation / detection of the control and / or data channels within the RB 408.

[0060] In DL transmission, the scheduling entity may allocate one or more REs 406 (e.g., within the control region 412) to one or more scheduled entities to carry DL control information including one or more DL control channels, which generally carry information originating from higher layers, such as a physical broadcast channel (PBCH), a physical downlink control channel (PDCCH), etc. In addition, DL REs may also be allocated to carry DL physical signals, which generally do not carry information originating from higher layers. These DL physical signals may include a primary synchronization signal (PSS); a secondary synchronization signal (SSS); a demodulation reference signal (DM-RS); a phase tracking reference signal (PT-RS); a channel state information reference signal (CSI-RS); etc.

[0061] In UL transmission, the transmitting device (e.g., the scheduled entity 106) may use one or more REs 406 to carry UL control information 118 (UCI). The UCI may originate from higher layers via one or more UL control channels (such as a physical uplink control channel (PUCCH), a physical random access channel (PRACH), etc.) to the scheduling entity 108. In addition to control information, one or more REs 406 (e.g., within the data region 414) may be allocated for user data or traffic data. Such traffic may be carried by 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.

[0062] Described above and in Figure 1 and Figure 4 The channels or carriers shown in are not necessarily all channels or carriers that may be employed between the scheduling entity 108 and the scheduled entity 106, and those skilled in the art will recognize that other channels or carriers may be employed in addition to those illustrated, such as other traffic, control, and feedback channels.

[0063] These physical channels described above are generally multiplexed and mapped to transport channels for processing at the medium access control (MAC) layer. The transport channels carry blocks of information called transport blocks (TBs). The transport block size (TBS), which may correspond to the number of bits of information, may be a controlled parameter based on the modulation and coding scheme (MCS) and the number of RBs in a given transmission.

[0064] In sidelink communication, resource allocation can be autonomous. Autonomous resource allocation can refer to that the UE participating in the sidelink communication determines the time and frequency resources for data transmission without being scheduled by a network entity (e.g., a base station). In some cases, the UE involved in the sidelink communication may be power sensitive, for example, when the UE relies on a limited power source (e.g., a battery) to work. It may be disadvantageous for power-sensitive UEs to continuously monitor sidelink transmissions to receive any relevant transmissions. According to one or more aspects of the present disclosure, a UE may be suitable for facilitating resource allocation for another UE in a sidelink communication. In some embodiments, such resource allocation for sidelink communication can promote power conservation in one or more wireless communication devices. As an example and not limitation, various aspects of the present disclosure may be applied to communications between pedestrian UEs (P-UEs) and vehicle UEs (V-UEs), wherein the P-UEs are power-sensitive devices and the V-UEs are not power-sensitive.

[0065] According to one or more aspects of the present disclosure, the first UE reserves sidelink resources for the second UE. For example, Figure 5 5 is a flow diagram depicting communication between two UEs, a first UE (UE-A) 502 and a second UE (UE-B) 504. As indicated, UE-A 502 may reserve 506 sidelink resources for UE-B 504. UE-B 504 may determine 508 which resource(s) are reserved and may send sidelink traffic 510 on at least a portion of the reserved sidelink resource(s). In this example, the sidelink traffic 510 is shown as being sent by UE-B 504 to UE-A 502, but it should be understood that UE-B 504 may use resource reservation to send sidelink transmissions to a UE other than UE-A 502.

[0066] exist Figure 5 In some embodiments, UE-A may be a power sensitive device. Figure 6 6 is a flow chart depicting communication between UE-A 602 and UE-B 604, wherein UE-A 602 is a power-sensitive device and UE-B 604 is not a power-sensitive device. By way of example and not limitation, UE-A 602 may be a P-UE and UE-B 604 may be a V-UE, wherein these UEs are participating in vehicle-to-pedestrian (V2P) communication. This example is merely illustrative and should not be construed as limiting the present disclosure. Obviously, according to various examples, UE-A 602 and UE-B 604 may also be other types of UEs.

[0067] As shown, UE-A 602 may optionally sense a sidelink resource pool 606 to determine resource usage. Based on such sensing of the sidelink resource pool, UE-A 602 may understand whether the time / frequency resource has been or will be occupied by other devices. UE-A 602 may accordingly select the sidelink resource to be used by UE-B 604. In other embodiments, UE-A 602 may simply randomly select one or more random sidelink resources. With the selected sidelink resource, UE-A 602 may transmit 608 a sidelink data transmission together with signaling that is configured to reserve one or more sidelink resources for future sidelink transmissions from UE-B 604. In at least one embodiment, the sidelink data transmission may include a pedestrian safety message (PSM).

[0068] UE-B 604 may detect the resource reservation signaling to determine which resource(s) are reserved 610, and may transmit sidelink traffic 612 in at least a portion of the resource(s) indicated by the reservation signaling. In some implementations, resource reservation may reserve a single sidelink resource for UE-B transmission, or may reserve multiple sidelink resources for UE-B 604 to select from for sidelink traffic transmission 612.

[0069] By reserving one or more sidelink resources for use by UE-B 604, UE-A 602 knows where to receive any response messages from UE-B 604. Accordingly, UE-A 602 may power down one or more components outside of the reserved sidelink resources to save power.

[0070] exist Figure 5 In some embodiments, UE-B may be a power sensitive device. Figure 7 is a flow chart depicting communication between UE-A 702 and UE-B 704, wherein UE-B 704 is a power sensitive device and UE-A 702 is not a power sensitive device. By way of example and not limitation, UE-A 702 may be a V-UE and UE-B 704 may be a P-UE, wherein these UEs are participating in vehicle-to-pedestrian (V2P) communication. In other examples, UE-A 702 may be a smartphone and UE-B 704 may be a wearable device, whereby UE-B 704 may be more power sensitive than UE-A 702, even though both UEs may be operating with limited power sources. These examples are merely illustrative and should not be construed as limiting the present disclosure. Obviously, according to various examples, UE-A 702 and UE-B 704 may also be other types of UEs.

[0071] In some examples, UE-B 704 may send sidelink transmissions and / or sidelink resource requests 706. For example, UE-B 704 may send data transmissions and / or scheduling requests that are received by UE-A 702. In other embodiments, UE-A 702 may simply reserve resources for other UEs (e.g., UE-B 704) in a periodic manner without receiving any sidelink transmissions and / or sidelink resource requests.

[0072] In response to receiving the sidelink transmission and / or resource request, UE-A 702 selects one or more sidelink resources for selection by UE-B 704 for future sidelink transmissions. According to at least one example, such selection may include optional sensing of a sidelink resource pool 708 by UE-A 702 to identify future available sidelink resources. In other examples, UE-B 704 may simply randomly select one or more sidelink resources to be reserved.

[0073] After sending the sidelink traffic and / or resource request, UE-B 704 may monitor 710 for sidelink resource reservation signaling. After selecting one or more sidelink resources, UE-A 702 may send sidelink resource reservation signaling 712 that may be detected by UE-B 704. After detecting the resource reservation signaling, UE-B 704 determines 714 which sidelink resource(s) are reserved and may send sidelink traffic 716 on at least a portion of the reserved sidelink resource(s).

[0074] In some examples, the resource reservation may include a single sidelink resource. In other examples, the resource reservation may include multiple reservations, including resources for multiple transmission occasions, for example, the reserved resources are resources located in multiple time slots and / or multiple resource blocks (RBs) / subchannels. In the example where UE-A 702 reserves multiple resources, UE-B 704 may transmit in each of the multiple resources, for example, by repeating the sidelink transmission or by sending different packets in each of the multiple reserved sidelink resources. In another example where UE-A 702 reserves multiple resources, UE-B 704 may transmit in one of the multiple resources, wherein the resource used for transmission is determined according to a predefined rule, for example, randomly selecting one of the reserved resources or selecting a resource implied by the ID of UE-B, etc.

[0075] In some examples, UE-B 704 can indicate its location in a sidelink transmission and / or in a sidelink resource request 706. Such a location indicator can be used by any receiving UE (e.g., UE-A 702) to determine whether to reserve sidelink resources for UE-B 704. For example, the receiving UE can utilize a range threshold, where any UE outside the range threshold (e.g., more than a threshold distance from UE-B 704) is configured to not reserve any sidelink resources for UE-B 704.

[0076] In some examples, more than one UE may receive sidelink traffic and / or resource requests 706 from UE-B 704. In embodiments utilizing a location indicator, more than one UE may receive transmission 706 and may also be within a range threshold. Thus, more than one UE may reserve sidelink resources for UE-B 704. In such an example, UE-B 704 may select one of the reserved sidelink resources for transmission. Alternatively, UE-B 704 may transmit in more than one or all of the reserved resources, e.g., in a repeated manner.

[0077] In this example, by enabling UE-A 702 to reserve sidelink resources for UE-B 704, UE-B 704 can save power by avoiding resource pool sensing (which may be required to select resources to be reserved). In addition, UE-B 704 can save power by avoiding the transmission of reservation signaling (which may be required to reserve sidelink resources). Instead, in this example, UE-A 702 performs any required sensing and sends resource reservation signaling.

[0078] exist Figure 7 In some embodiments, resource reservation by UE-A 702 may occur in response to a certain type of transmission. For example, if UE-A 702 is a V-UE and detects or receives a sidelink transmission made by UE-B 704, which is implemented as a P-UE, then UE-A 702 (e.g., a V-UE) may reserve resources for any P-UE transmissions. The reserved resource(s) may be used by the specific P-UE (e.g., UE-B 704) sending the sidelink transmission, or may be used by other P-UEs. In addition, the reserved sidelink resources may be used for any communication made by the P-UE, whether with a V-UE or other type of UE.

[0079] exist Figure 7 In some embodiments, certain types of UEs may always perform resource reservation for another type of UE. In a first example, any V-UE (e.g., UE-A 702) communicating with a P-UE (e.g., UE-B 704) may reserve sidelink resources for the P-UE. In at least one embodiment, when the V-UE sends a pedestrian-related safety message (e.g., to a P-UE), the V-UE may also reserve sidelink resources for the P-UE transmission. Accordingly, any P-UE that receives a V-UE safety message may transmit in the reserved sidelink resources.

[0080] In a second example, a UE with greater capability in a sidelink UE pair / group may reserve resources for other UEs in the pair / group. For example, a smartphone UE may have greater capability than a smartwatch UE or other wearable UE. In such an example, a smartphone UE may reserve sidelink resources for a smartwatch UE.

[0081] In a third example, a sidelink UE group may select one UE in the group as a leader. For example, a sidelink UE group may select one UE in the group as a leader. In such an example, the leader UE may perform sensing and may reserve sidelink resources for other UEs in the group.

[0082] In a fourth example, an RSU (Roadside Unit, which is a node that communicates with a UE on a sidelink) may reserve resources for a V-UE or a P-UE for sidelink transmission. For example, the RSU may detect / sense the sidelink resources and reserve one or more resources based on the sensing results.

[0083] Figure 8 is a block diagram illustrating selected components of a wireless communication device 800 employing a processing system 802 according to at least one example of the present disclosure. The wireless communication device 800 may be a power-sensitive wireless communication device, as described herein.

[0084] In this example, processing system 802 is implemented using a bus architecture, generally represented by bus 804. Bus 804 may include any number of interconnecting buses and bridges depending on the specific application of processing system 802 and the overall design constraints. Bus 804 communicatively couples various circuits together, including one or more processors (generally represented by processing circuit 806), memory 808, and computer readable media (generally represented by storage media 810). Bus 804 may also connect various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are known in the art and will not be described further.

[0085] The bus interface 812 provides an interface between the bus 804 and the transceiver 814. The transceiver 814 provides a mechanism for communicating with various other devices via a transmission medium. For example, the transceiver 814 may include a receive chain for receiving one or more wireless signals and / or a transmit chain for transmitting one or more wireless signals. Depending on the nature of the device, a user interface 816 (e.g., a keypad, display, speaker, microphone, joystick) may also be provided.

[0086] The processing circuit 806 is responsible for managing the bus 804 and general processing, including the execution of programs stored on the computer-readable storage medium 810. The programs, when executed by the processing circuit 806, cause the processing system 802 to perform various functions described below for any particular device. The computer-readable storage medium 810 and the memory 808 may also be used to store data manipulated by the processing circuit 806 when the processing circuit executes the programs. As used herein, the term "program" should be broadly interpreted to include, but is not limited to, instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable programs, execution threads, processes, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description languages, or otherwise.

[0087] The processing circuit 806 is arranged to obtain, process and / or send data, control data access and storage, issue commands and control other expected operations. The processing circuit 806 may include a circuit system suitable for implementing the expected program provided by the appropriate medium and / or a circuit system suitable for performing one or more functions described in the present disclosure. For example, the processing circuit 806 can be implemented as one or more processors, one or more controllers and / or other structures configured to execute executable programs and / or perform specific functions. Examples of the processing circuit 806 may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) and / or other programmable logic components, discrete gates or transistor logic, discrete hardware components or any combination thereof designed to perform the functions described herein. A general-purpose processor may include a microprocessor and any conventional processor, controller, microcontroller or state machine. The processing circuit 806 may also be implemented as a combination of computing components, such as a combination of a DSP and a microprocessor, several microprocessors, one or more microprocessors working in conjunction with a DSP core, an ASIC and a microprocessor, or any other number of variations. These examples of processing circuitry 806 are for purposes of illustration, and other suitable configurations are also contemplated that are within the scope of the present disclosure.

[0088] In some cases, the processing circuit 806 may include a sidelink communication circuit and / or module 818. The sidelink communication circuit / module 818 may generally include a module adapted to perform the operations described herein. Figure 1-7 , Fig. 9 and Fig.10 Circuit systems and / or programs (e.g., programs stored on storage medium 810) that implement one or more of the functions, processes, or steps described herein. As used herein, references to circuit systems and / or programs may generally refer to logic (e.g., logic gates and / or data structure logic).

[0089] The storage medium 810 may represent one or more computer-readable devices for storing programs (such as processor executable code or instructions (e.g., software, firmware)), electronic data, databases, or other digital information. The storage medium 810 may also be used to store data manipulated by the processing circuit 806 when the processing circuit executes the program. The storage medium 810 may be any available non-transitory medium that can be accessed by a general-purpose or special-purpose processor, including portable or fixed storage devices, optical storage devices, and various other media capable of storing, containing, and / or carrying programs. By way of example and not limitation, the storage medium 810 may include non-transitory computer-readable storage media, such as magnetic storage media (e.g., hard disks, floppy disks, tapes), optical storage media (e.g., compact disks (CDs), digital versatile disks (DVDs), smart cards, flash memory devices (e.g., cards, sticks, key drives)), random access memory (RAM), read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), registers, removable disks, and / or other media for storing programs, and combinations thereof.

[0090] Storage medium 810 may be coupled to processing circuit 806 such that processing circuit 806 can read information from storage medium 810 or write information to storage medium 810. That is, storage medium 810 may be coupled to processing circuit 806 such that storage medium 810 is at least accessible to processing circuit 806, including examples where storage medium 810 is integrated with processing circuit 806 and / or examples where storage medium 810 is separate from processing circuit 806 (e.g., present within processing system 802, outside processing system 802, distributed across multiple entities).

[0091] The program stored by the storage medium 810, when executed by the processing circuit 806, may cause the processing circuit 806 to perform one or more of the various functions and / or process steps described herein. In at least some examples, the storage medium 810 may include sidelink communication operations 820. The various operations described may generally be adapted to cause the processing circuit 806 to perform the various functions and / or process steps described herein. Figure 1-7 , Fig. 9 and Fig.10One or more of the functions, processes or steps described herein. Thus, according to one or more aspects of the present disclosure, the processing circuit 806 is adapted (independently or in cooperation with the storage medium 810) to perform any or all processes, functions, steps and / or routines of any or all wireless communication devices (e.g., scheduled entities 106, 107, UEs 222, 224, 226, 228, 230, 232, 234, 236, 238, 240 and 242, UE-A 502, 602, 702, UE-B 504, 604, 704) described herein. As used herein, the term "adapted to" in relation to the processing circuit 806 may refer to the processing circuit 806 being configured to, used for, implemented to and / or programmed to (in cooperation with the storage medium 810) perform specific processes, functions, steps and / or routines according to the various features described herein.

[0092] refer to Fig. 9 , which shows a flow chart of an illustrative wireless communication method (e.g., which may be operated on or via the wireless communication device 800) according to some examples. 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 for implementation of all embodiments. In some examples, the method may be as described above and in Figure 8 The wireless communication device 800 illustrated in the example may be executed by a processor or a processing system, or may be executed by any appropriate means for implementing the described functions.

[0093] At 902, the wireless communication device may send a reservation signal to reserve one or more sidelink resources for use by another device. For example, the processing system 802 may include logic (e.g., the sidelink communication circuit / module 818 and / or the sidelink communication operation 820) to send a reservation signal via the transceiver 814 to reserve the one or more sidelink resources for use by the other device.

[0094] In some embodiments (e.g., reference above Figure 7In the example described above, the wireless communication device may send the reservation signal in response to receiving an initial sidelink transmission from the other device. Such an initial sidelink transmission may include at least one of a sidelink resource request or a sidelink service from the other device. In some embodiments, the initial sidelink transmission may further include a location indicator configured to indicate the location of the other device. In the case where the initial sidelink transmission includes such a location indicator, the wireless communication device may send the reservation signal when the other device is within a range threshold (e.g., less than a threshold distance from the wireless communication device), and avoid sending the reservation signal when the other device is outside the range threshold (e.g., more than the threshold distance from the wireless communication device).

[0095] In some embodiments (e.g., reference above Figure 6 In the example described in the accompanying drawings, the wireless communication device may send a pedestrian safety message (PSM) together with the reserved signal.

[0096] At 904, the wireless communication apparatus may receive a sidelink transmission from the other apparatus on at least a portion of the reserved one or more sidelink resources. For example, the processing system 802 may include logic (e.g., the sidelink communication circuit / module 818 and / or the sidelink communication operations 820) to receive a sidelink transmission from the other apparatus on at least a portion of the reserved one or more sidelink resources via the transceiver 814.

[0097] In some embodiments (e.g., reference above Figure 6 In the example described above, the wireless communication device may monitor one or more reserved sidelink resources for a sidelink transmission from another device. In such an embodiment, the wireless communication device may power off one or more components of the transceiver (e.g., transceiver 814) during sidelink resources outside of the one or more reserved sidelink resources, and power on the one or more components of the transceiver to receive transmissions during the one or more reserved sidelink resources.

[0098] In some embodiments, the wireless communication device may sense the sidelink resource pool before sending the reservation signal to determine resource usage, and select the one or more sidelink resources based on the sensing of the sidelink resource pool.

[0099] refer to Fig.10, which shows a flow chart illustrating a wireless communication method (e.g., which may be operated on or via the wireless communication device 800) according to some embodiments. 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 for implementation of all embodiments. In some examples, the method may be as described above and in Figure 8 The wireless communication device 800 illustrated in the example may be executed by a processor or a processing system, or may be executed by any appropriate means for implementing the described functions.

[0100] At 1002, a wireless communication device may detect a reservation signal from another device, wherein the reservation signal is configured to reserve one or more sidelink resources. For example, the processing system 802 may include logic (e.g., the sidelink communication circuit / module 818 and / or the sidelink communication operation 820) to detect a reservation signal from another device via the transceiver 814, wherein the reservation signal is configured to reserve one or more sidelink resources. In some embodiments, detecting the reservation signal may further include detecting a pedestrian safety message (PSM) sent in addition to the reservation signal.

[0101] In some embodiments (e.g., reference above Figure 7 In the example described in the foregoing, the wireless communication device may send an initial sidelink transmission via the transceiver (e.g., transceiver 814) before detecting a reservation signal from the other device. The initial sidelink transmission may include at least one of a data transmission and / or a sidelink resource reservation request. In some embodiments, the initial sidelink transmission may further include a current location of the wireless communication device. After sending the initial sidelink transmission, the wireless communication device may monitor resource reservation signaling via the transceiver to obtain the reservation signal.

[0102] At 1004, the wireless communication apparatus may send a sidelink transmission on at least a portion of the one or more sidelink resources reserved by the other apparatus. For example, the processing system 802 may include logic (e.g., the sidelink communication circuit / module 818 and / or the sidelink communication operation 820) to send a sidelink transmission on at least a portion of the one or more sidelink resources reserved by the other apparatus via the transceiver 814.

[0103] In some embodiments, the wireless communication device may send a sidelink transmission via the transceiver in each of the one or more sidelink resources reserved by the other device. For example, the wireless communication device may repeat the sidelink transmission to utilize each of the one or more sidelink resources reserved by the other device, or may send a different packet in each of the multiple reserved sidelink resources. In some embodiments, the wireless communication device may send the sidelink transmission via the transceiver in one of the one or more sidelink resources reserved by the other device according to a predefined rule.

[0104] The following provides an overview of various aspects of the present disclosure:

[0105] Aspect 1: A wireless communication method, the method comprising: sending a reservation signal to reserve one or more sidelink resources for use by another device; and receiving a sidelink transmission from the other device on at least a portion of the reserved one or more sidelink resources.

[0106] Aspect 2: The method of Aspect 1, wherein sending a reservation signal to reserve one or more sidelink resources for use by another device includes: sending the reservation signal to reserve the one or more sidelink resources for use by the other device in response to receiving an initial sidelink transmission from the other device.

[0107] Aspect 3: The method of Aspect 2, wherein the initial sidelink transmission from the other device includes a location indicator associated with the other device.

[0108] Aspect 4: The method of method 3, wherein sending a reservation signal to reserve one or more side link resources for use by another device includes: sending the reservation signal to reserve the one or more side link resources for use by the other device when the location indicator indicates that the other device is within a range threshold.

[0109] Aspect 5: The method of Aspect 4, wherein receiving a sidelink transmission from the other device on at least a portion of the reserved one or more sidelink resources includes: monitoring the reserved one or more sidelink resources for the sidelink transmission from the other device.

[0110] Aspect 6: The method of Aspect 5 further includes: powering off one or more components of the transceiver in a side link resource located outside the reserved one or more side link resources; and powering on the one or more components of the transceiver in the one or more reserved side link resources to receive transmission.

[0111] Aspect 7: The method of any of Aspects 1 to 6 further comprises: before sending the reservation signal, sensing the sidelink resource pool to determine resource usage; and selecting the one or more sidelink resources based on the sensing of the sidelink resource pool.

[0112] Aspect 8: The method of aspect 1, 5, 6 or 7, wherein sending a reservation signal to reserve one or more sidelink resources for use by another device comprises: sending a pedestrian safety message together with the reservation signal.

[0113] Aspect 9: A wireless communication device, comprising a transceiver and a processing circuit communicatively coupled together, wherein the processing circuit is configured to perform the method of any one of aspects 1 to 8.

[0114] Aspect 10: A wireless communication method, the method comprising: detecting a reservation signal from another device, wherein the reservation signal is configured to reserve one or more sidelink resources; and sending a sidelink transmission on the one or more sidelink resources reserved by the other device.

[0115] Aspect 11: The method of Aspect 10 further includes: sending an initial sidelink transmission before detecting a reservation signal from the other device, the initial sidelink transmission including at least one of data transmission or a sidelink resource reservation request; and monitoring resource reservation signaling to obtain the reservation signal after sending the initial sidelink transmission.

[0116] Aspect 12: The method of Aspect 11, wherein the initial sidelink transmission further comprises a location indicator configured to indicate a current location of the wireless communication device sending the initial sidelink transmission.

[0117] Aspect 13: The method of any one of Aspects 10 to 12, wherein sending the sidelink transmission on the one or more sidelink resources reserved by the other device includes: sending the sidelink transmission in each of the one or more sidelink resources reserved by the other device.

[0118] Aspect 14: The method of Aspect 13, wherein sending the sidelink transmission in each of the one or more sidelink resources reserved by the other device includes: repeating the sidelink transmission to utilize each of the one or more sidelink resources reserved by the other device.

[0119] Aspect 15: The method of any one of Aspects 10 to 12, wherein sending the sidelink transmission on the one or more sidelink resources reserved by the other device comprises: sending the sidelink transmission in one of the one or more sidelink resources reserved by the other device according to a predefined rule.

[0120] Aspect 16: The method of aspect 1, wherein detecting a reserved signal from the other device further comprises: detecting a pedestrian safety message in addition to the reserved signal.

[0121] Aspect 17: A wireless communication device, comprising a transceiver and a processing circuit communicatively coupled together, the processing circuit being configured to perform the method of any one of aspects 10 to 16.

[0122] Aspect 18: An apparatus configured for wireless communication, comprising at least one means for performing the method of any one of aspects 1 to 8 or aspects 10 to 16.

[0123] Aspect 19: A non-transitory processor-readable storage medium storing processor-executable instructions, the instructions being used to cause a processing circuit to perform the method of any one of aspects 1 to 8 or aspects 10 to 16.

[0124] Several aspects of wireless communication networks have been described with reference to exemplary embodiments. Those skilled in the art will readily appreciate that various aspects described throughout this disclosure may be extended to other telecommunication systems, network architectures, and communication standards.

[0125] As an example, various aspects may be implemented in other systems defined by 3GPP or in a combination of such systems. These systems may include candidates such as 5G New Air (NR), 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 Optimization (EV-DO). Other examples may be implemented in systems employing IEEE 802.11 (Wi-Fi), IEEE802.16 (WiMAX), IEEE 802.20, Ultra Wideband (UWB) or Bluetooth and / or in other suitable systems. The actual telecommunication standards, network architectures and / or communication standards employed will depend on the specific application and the overall design constraints imposed on the system.

[0126] Within the present disclosure, the word "exemplary" is used to mean "serving as an example, instance, or illustration". Any implementation or aspect described herein as "exemplary" is not necessarily to be understood as being preferred or advantageous over other aspects of the present disclosure. Similarly, the word "aspect" does not require that all aspects of the present disclosure include the discussed features, advantages, or modes of operation. The word "coupled" refers to a direct or indirect coupling between two objects in this article. For example, if object A physically contacts object B, and object B contacts object C, then objects A and C can 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 can be coupled to a second object, even if the first object is never in direct physical contact with the second object. The words "circuit" and "circuitry" are used in a broad sense and are intended to include both hardware implementations of electrical components and conductors (which, when connected and configured, implement the functions described in the present disclosure without limitation in terms of the type of electronic circuits), and software implementations of information and instructions (which, when executed by a processor, implement the functions described in the present disclosure).

[0127] Although the aspects, arrangements, and embodiments discussed above are discussed in connection with particular details and specificity, Figure 1 , 2 One or more of the components, steps, features, and / or functions illustrated in , , 3, 4, 5, 6, 7, 8, 9, and / or 10 may be rearranged and / or combined into a single component, step, feature, or function, or may be embodied in several components, steps, or functions. Additional elements, components, steps, and / or functions may also be added or not used without departing from the novel features of the present disclosure. Figure 1 , 2 , 3, 5, 6, 7 and / or 8 may be configured to perform or employ the devices, apparatuses and / or components illustrated in this document. Figure 4 , 5 , 6, 7, 9 and / or 10. The novel algorithms described herein can also be efficiently implemented in software and / or embedded in hardware.

[0128] It should be understood that the specific order or hierarchy of steps in the disclosed method is merely an illustration of an exemplary process. It should be understood that the specific order or hierarchy of steps in the method can be rearranged based on design preferences. The attached method claims present the elements of the various steps in a sample order, but are not intended to be limited to the specific order or hierarchy presented unless specifically set forth therein.

[0129] The various features associated with the examples described herein and shown in the accompanying drawings may be implemented in different examples and implementations without departing from the scope of the present disclosure. Therefore, although certain specific configurations and arrangements have been described and shown in the accompanying drawings, such embodiments are merely illustrative and do not limit the scope of the present disclosure, as various additions and modifications to the described embodiments and deletions thereto will be apparent to those of ordinary skill in the art. Thus, the scope of the present disclosure is determined solely by the written language of the appended claims and their legal equivalents.

Claims

1. A wireless communication device, comprising: Transceiver; as well as a processing circuit communicatively coupled to the transceiver, the processing circuit being configured to: sending, via the transceiver, a reservation signal to reserve one or more sidelink resources for use by another device; powering down one or more components of the transceiver during sidelink resources other than one or more reserved sidelink resources based on the transmitted reservation signal; During one or more reserved sidelink resources based on the transmitted reservation signal, powering up the one or more components of the transceiver to receive transmissions; and A sidelink transmission is received from the other apparatus via the transceiver on at least a portion of the one or more reserved sidelink resources.

2. The wireless communication device according to claim 1, wherein: The processing circuitry being configured to receive, via the transceiver, the sidelink transmission from the other apparatus on at least a portion of the one or more reserved sidelink resources comprises the processing circuitry being configured to: The one or more reserved sidelink resources are monitored for sidelink transmissions from the other apparatus.

3. The wireless communication device according to claim 1, wherein: The processing circuit is further configured to: Before sending the reservation signal, sensing a sidelink resource pool to determine resource usage; and Based on the sensing of the sidelink resource pool, the one or more sidelink resources are selected.

4. The wireless communication device according to claim 1, wherein: The processing circuitry being configured to send, via the transceiver, the reservation signal to reserve the one or more sidelink resources for use by the other apparatus comprises the processing circuitry being configured to: A pedestrian safety message is transmitted via the transceiver along with the reservation signal.

5. A wireless communication method, comprising: sending a reservation signal to reserve one or more sidelink resources for use by another device; powering down one or more components of the transceiver during sidelink resources other than one or more reserved sidelink resources based on the transmitted reservation signal; powering the one or more components of the transceiver to receive a transmission during the one or more reserved sidelink resources based on the transmitted reservation signal; as well as A sidelink transmission is received from the other apparatus on at least a portion of the one or more reserved sidelink resources.

6. The method according to claim 5, wherein: Receiving a sidelink transmission from the other apparatus on at least a portion of the one or more reserved sidelink resources includes: The one or more reserved sidelink resources are monitored for sidelink transmissions from the other apparatus.

7. The method according to claim 5, further comprising: Before sending the reservation signal, sensing the sidelink resource pool to determine resource usage; as well as Based on the sensing of the sidelink resource pool, the one or more sidelink resources are selected.

8. The method according to claim 5, wherein: Sending the reservation signal to reserve the one or more sidelink resources for use by the other apparatus comprises: A pedestrian safety message is sent along with the reservation signal.

Images