Sidelink connectionless groupcast communication technology using security keys

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user device (UE) may transmit to a node a request for a security key for sidelink connectionless groupcast communication performed between UEs without a wireless resource control connection. The request may indicate a distance from the UE to use the security key. The UE may receive information from the node indicating the security key. A number of other aspects are described.

Description

Technology Field

[0001] Cross-reference regarding related applications

[0002] The present application claims priority to U.S. Patent Application No. 17 / 645,155, filed on December 20, 2021, under the title "TECHNIQUES FOR SIDELINK CONNECTIONLESS GROUPCAST ​​COMMUNICATION USING A SECURITY KEY" and assigned to the assignee of the present application. The disclosures of the prior application are considered part of the present application and are incorporated by reference into the present application.

[0003] Technology field

[0004] Aspects of the present disclosure generally relate to wireless communication and technology and apparatus for side-link non-connected groupcast communication using a security key. Background Technology

[0005] Wireless communication systems are widely deployed to provide various communication services such as telephone, video, data, messaging, and broadcasting. Conventional wireless communication systems may utilize multiple access technologies that support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TOMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single-Carrier Frequency Division Multiple Access (SC-FDMA) systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is a series of enhanced technologies for the Universal Mobile Telecommunications System (UMTS) mobile standards published by the 3rd Generation Partnership Project (3GPP).

[0006] A wireless network may include one or more base stations that support communication for a User Equipment (UE) or a number of UEs. A UE may communicate with a base station via downlink communication and uplink communication. "Downlink" (or "DL") refers to a communication link from a base station to a UE, and "Uplink" (or "UL") refers to a communication link from a UE to a base station.

[0007] The above multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different UEs to communicate at city, national, regional, and / or global levels. New Radio (NR), also known as 5G, is a series of enhanced technologies for the LTE mobile standard published by 3GPP. NR is designed to support mobile broadband internet access more effectively through improved spectrum efficiency, cost reduction, service improvement, utilization of new spectrum, and better integration with other open standards by using Orthogonal Frequency Division Multiplexing (OFDM) with periodic prefixes (CP) in the downlink and CP-OFDM and / or Single-Carrier Frequency Division Multiplexing (SC-FDM) (also known as Discrete Fourier Transform Spread OFDM (DFT-s-OFDM)) in the uplink. Additionally, it is supported by beamforming, Multiple Input Multiple Output (MIMO) antenna technology, and carrier bundling. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other wireless access technologies remain useful.

[0008] Some embodiments described herein relate to a wireless communication method performed by a user equipment (UE). The method may include the step of transmitting to a node a request for a security key for sidelink connectionless groupcast communication performed between UEs without a Radio Resource Control (RRC) connection, wherein the request indicates a distance from the UE to use the security key. The method may include the step of receiving information from the node indicating the security key.

[0009] Some embodiments described herein relate to a wireless communication method performed by a node. The method may include the step of receiving from a UE a request for a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection, wherein the request indicates a distance from the UE for using the security key. The method may include the step of transmitting information indicating the security key to the UE and to at least one other UE within a distance of the UE.

[0010] Some embodiments described herein relate to a wireless communication method performed by a UE. The method may include the step of receiving from a node information representing a security key for a sidelink connectionless groupcast communication performed between UEs without an RRC connection. The method may include the step of receiving communication for a sidelink connectionless groupcast from another UE using the security key.

[0011] Some embodiments described herein relate to a device for wireless communication in a UE. The device may include a memory and one or more processors coupled to the memory. One or more processors may be configured to transmit to a node a request for a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection, the request indicating a distance from the UE to use the security key. One or more processors may be configured to receive information indicating the security key from the node.

[0012] Some embodiments described herein relate to a device for wireless communication at a node. The device may include a memory and one or more processors coupled to the memory. One or more processors may be configured to receive from a UE a request for a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection, the request indicating a distance from the UE to use the security key. One or more processors may be configured to transmit information indicating the security key to the UE and to at least one other UE within a distance of the UE.

[0013] Some embodiments described herein relate to a device for wireless communication in a UE. The device may include a memory and one or more processors coupled to the memory. One or more processors may be configured to receive from a node information representing a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection. One or more processors may be configured to receive communication for a sidelink connectionless groupcast from another UE using the security key.

[0014] Some embodiments described herein relate to a non-transient computer-readable medium storing a set of instructions for wireless communication by a UE. When executed by one or more processors of the UE, the set of instructions may cause the UE to transmit to a node a request for a security key for sidelink connectionless groupcast communication performed without an RRC connection between UEs, and the request indicates a distance from the UE to use the security key. When executed by one or more processors of the UE, the set of instructions may cause the UE to receive information from the node indicating the security key.

[0015] Some embodiments described herein relate to a non-transient computer-readable medium storing a set of instructions for wireless communication by a node. When executed by one or more processors of the node, the set of instructions may cause the node to receive from a UE a request for a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection, and the request indicates a distance from the UE for using the security key. When executed by one or more processors of the node, the set of instructions may cause the node to transmit information indicating the security key to the UE and to at least one other UE within a distance of the UE.

[0016] Some embodiments described herein relate to a non-transient computer-readable medium storing a set of instructions for wireless communication by a UE. When executed by one or more processors of the UE, the set of instructions may enable the UE to receive from a node information representing a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection. When executed by one or more processors of the UE, the set of instructions may enable the UE to receive communication for a sidelink connectionless groupcast from another UE using the security key.

[0017] Some embodiments described herein relate to a device for wireless communication. The device may include means for transmitting to a node a request for a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection, the request indicating the distance from the device to use the security key. The device may include means for receiving information indicating the security key from the node.

[0018] Some embodiments described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving from a UE a request for a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection, wherein the request indicates a distance from the UE for using the security key. The apparatus may include means for transmitting information indicating the security key to the UE and to at least one other UE within a distance of the UE.

[0019] Some embodiments described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving from a node information representing a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection. The apparatus may include means for receiving communication for a sidelink connectionless groupcast from another UE using the security key.

[0020] The embodiments generally include methods, devices, systems, computer program products, non-transient computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as substantially described in this specification with reference to the drawings and the specification and as illustrated by the drawings and the specification.

[0021] The foregoing description has been somewhat broad in its explanation of the features and technical advantages of the examples according to the present disclosure to better facilitate the detailed description that follows. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily utilized as a basis for modifying or designing other structures to achieve the same purpose of the present disclosure. Such equivalent configurations do not depart from the scope of the appended claims. The features of the concepts disclosed herein, their configurations and methods of operation, and associated advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each drawing is provided for illustrative and illustrative purposes only and is not intended to define the limits of the claims. Brief explanation of the drawing

[0022] To enable a detailed understanding of the features of the present disclosure described above, a more specific description may be made by reference to embodiments, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings illustrate only certain ordinary embodiments of the present disclosure and are therefore not to be construed as limiting the scope of the present disclosure, as other embodiments that are equally effective in describing may be allowed. Identical reference numbers in different drawings may identify identical or similar elements. FIG. 1 is a drawing illustrating an example of a wireless network according to the present disclosure. FIG. 2 is a drawing illustrating an example of a base station communicating with a user equipment (UE) in a wireless network according to the present disclosure. FIG. 3 is a drawing illustrating an example of side link communication according to the present disclosure. FIG. 4 is a drawing illustrating an example of side link communication and connection link communication according to the present disclosure. FIG. 5 is a drawing illustrating an example of a side-link disconnected group cast communication using a security key according to the present disclosure. FIGS. 6 through 8 are drawings illustrating an exemplary process associated with a sidelink disconnected groupcast communication using a security key according to the present disclosure. FIGS. 9 and FIGS. 10 are drawings of an exemplary device for wireless communication according to the present disclosure. Specific details for implementing the invention

[0023] Various aspects of the present disclosure are described below in greater detail with reference to the accompanying drawings. However, the present disclosure may be embodied in many different forms and should not be interpreted as being limited to any specific structure or function presented throughout the entire disclosure. Rather, these aspects are provided to ensure that the present disclosure is complete and that the scope of the present disclosure is fully conveyed to those skilled in the art. Those skilled in the art should understand that the scope of the present disclosure is intended to encompass any aspect of the disclosure disclosed herein, whether it is embodied independently of or combined with any other aspect of the present disclosure. For example, an apparatus may be embodied or a method may be practiced using any number of aspects described herein. Additionally, the scope of the present disclosure is intended to cover any apparatus or method practiced using a structure, function, or structure and function other than those various aspects of the present disclosure described herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of the claims.

[0024] Several embodiments of telecommunication systems will now be presented with reference to various devices and technologies. These devices and technologies will be described in the following detailed description and will be illustrated in the accompanying drawings by various blocks, modules, components, circuits, stages, processes, algorithms, etc. (collectively referred to as “Elements”). These Elements may be implemented using hardware, software, or a combination thereof. Whether these Elements are implemented as hardware or software depends on the specific application and design constraints imposed on the overall system.

[0025] Although embodiments may be described herein using terms generally associated with 5G or New Radio (NR) Radio Access Technology (RAT), the embodiments of the present disclosure may be applicable to other RATs such as 3G RAT, 4G RAT, and / or RATs after 5G (e.g., 6G).

[0026] FIG. 1 is a drawing illustrating an example of a wireless network (100) according to the present disclosure. The wireless network (100) may be, among other examples, a 5G (e.g., NR) network and / or a 4G (e.g., LTE) network or may include elements of such a network. The wireless network (100) may include one or more base stations (110) (illustrated as BS (110a), BS (110b), BS (110c) and BS (110d)), user equipment (UE) (120) or a plurality of UEs (120) (illustrated as UE (120a), UE (120b), UE (120c), UE (120d) and UE (120e)), and / or other network entities. A base station (110) is an entity that communicates with a UE (120). A base station (110) (sometimes referred to as a BS) may include, for example, an NR base station, an LTE base station, a node B, an eNB (e.g., of 4G), a gNB (e.g., of 5G), an access point, and / or a transmit and receive point (TRP). Each base station (110) may provide communication coverage for a specific geographic area. In the 3GPP, the term “cell” may refer to the coverage area of ​​a base station (110) and / or a base station subsystem responsible for this coverage area, depending on the context in which the term is used.

[0027] A base station (110) may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographical area (e.g., a radius of several kilometers) and may allow unlimited access by a UE (120) through a service subscription. A pico cell may cover a relatively small geographical area and may allow unlimited access by a UE (120) through a service subscription. A femto cell may cover a relatively small geographical area (e.g., a home) and may allow limited access by a UE (120) associated with the femto cell (e.g., a UE (120) of a closed subscriber group (CSG). A base station (110) for a macro cell may be referred to as a macro base station. A base station (110) for a pico cell may be referred to as a pico base station. A base station (110) for a femto cell may be referred to as a femto base station or a home base station. In the example illustrated in FIG. 1, BS (110a) may be a macro base station for a macro cell (102a), BS (110b) may be a pico base station for a pico cell (102b), and BS (110c) may be a femto base station for a femto cell (102c). The base station may support one or more (e.g., three) cells.

[0028] In some examples, the cell may not necessarily be fixed, and the geographical area of ​​the cell may move according to the location of a movable base station (110) (e.g., a mobile base station). In some examples, the base station (110) may be interconnected with and / or each other with one or more other base stations (110) or network nodes (not shown) of the wireless network (100) through various types of backhaul interfaces, such as a direct physical connection or a virtual network using any suitable transport network.

[0029] A wireless network (100) may include one or more relay stations. A relay station is an entity capable of receiving transmissions of data from an upstream station (e.g., base station (110) or UE (120)) and transmitting transmissions of data to a downstream station (e.g., UE (120) or base station (110)). A relay station may be a UE (120) capable of relaying transmissions to another UE (120). In the example illustrated in FIG. 1, a BS (110d) (e.g., a relay base station) may communicate with a BS (110a) (e.g., a macro base station) and a UE (120d) to facilitate communication between the BS (110a) and the UE (120d). A base station (110) that relays communication may be referred to as a relay station, a relay base station, a repeater, etc.

[0030] A wireless network (100) may be a heterogeneous network comprising various types of base stations (110), such as macro base stations, pico base stations, femto base stations, and relay base stations. These various types of base stations (110) may have different transmission power levels, different coverage areas, and / or different effects on interference in the wireless network (100). For example, a macro base station may have a high transmission power level (e.g., 5 to 40 watts), while pico base stations, femto base stations, and relay base stations may have a lower transmission power level (e.g., 0.1 to 2 watts).

[0031] A network controller (130) may be coupled to or communicate with a set of base stations (110) and may provide coordination and control over these base stations (110). The network controller (130) may communicate with the base stations (110) via a backhaul communication link. The base stations (110) may communicate with each other indirectly or directly via a wireless or wired backhaul communication link.

[0032] UEs (120) may be distributed throughout the wireless network (100), and each UE (120) may be fixed or mobile. A UE (120) may include, for example, a connection terminal, a terminal, a mobile station, and / or a subscriber unit. The UE (120) may be a cellular phone (e.g., a smartphone), a personal information terminal (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a wireless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, a smart jewelry (e.g., a smart ring or a smart bracelet), an entertainment device (e.g., a music device, a video device, and / or a satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, and / or any other suitable device configured to communicate via a wireless or wired medium.

[0033] Some UEs (120) may be considered as Machine Communications (MTC) or evolved or enhanced Machine Communications (eMTC) UEs. MTC UEs and / or eMTC UEs may include robots, drones, remote devices, sensors, meters, monitors, and / or location tags capable of communicating with, for example, a base station, other devices (e.g., remote devices), or some other entity. Some UEs (120) may be considered as Internet of Things (IoT) devices and / or may be implemented as NB-IoT (Narrowband IoT) devices. Some UEs (120) may be considered as customer premises equipment. The UE (120) may be contained within a housing that accommodates components of the UE (120), such as processor components and / or memory components. In some examples, processor components and memory components may be combined together. For example, processor components (e.g., one or more processors) and memory components (e.g., memory) can be operably coupled, communically coupled, electronically coupled and / or electrically coupled.

[0034] Generally, any number of wireless networks (100) may be deployed in a given geographical area. Each wireless network (100) may support a specific RAT and may operate on one or more frequencies. The RAT may be referred to as a wireless technology, a wireless interface, etc. The frequency may be referred to as a carrier wave, a frequency channel, etc. Each frequency may support a single RAT in a given geographical area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0035] In some examples, two or more UEs (120) (illustrated, for example, as UE (120a) and UE (120e)) may communicate directly using one or more sidelink channels (for example, without using the base station (110) as an intermediary for communicating with each other). For example, the UEs (120) may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-all (V2X) protocols (e.g., vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V21) protocols, or vehicle-to-pedestrian (V2P) protocols), and / or a mesh network. In these examples, the UEs (120) may perform scheduling operations, resource selection operations, and / or other operations described elsewhere in this invention, such as those performed by the base station (110).

[0036] Devices in a wireless network (100) can communicate using an electromagnetic spectrum that can be subdivided into various classes, bands, channels, etc. by frequency or wavelength. For example, devices in a wireless network (100) can communicate using one or more operating bands. In 5G NR, two initial operating bands were identified as frequency range designations FR1 (410 MHz to 7.125 GHz) and FR2 (24.25 GHz to 52.6 GHz). It should be understood that even though part of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the "Sub-6 GHz" band in various literature and articles. A similar nomenclature problem sometimes arises with respect to FR2, which is often (interchangeably) referred to as the "millimeter wave" band in documents and papers, despite being different from the EHF (extremely high frequency) band (30 GHz - 300 GHz) identified by the International Telecommunication Union (ITU).

[0037] Frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR research has identified the operating band for these mid-band frequencies as the frequency range designation FR3 (7.125 GHz to 24.25 GHz). Since the frequency bands belonging to FR3 can inherit the characteristics of FR1 and / or FR2, the characteristics of FR1 and / or FR2 can be effectively extended to mid-band frequencies. Additionally, higher frequency bands are currently being studied to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as the frequency range designations FR4a or FR4-1 (52.6 GHz to 71 GHz), FR4 (52.6 GHz to 114.25 GHz), and FR5 (114.25 GHz to 300 GHz). Each of these higher frequency bands belongs to the EHF band.

[0038] With the above examples in mind, it should be understood that, unless specifically stated otherwise, terms such as “sub-6 GHz” as used herein may broadly denote frequencies that may be less than 6 GHz, may be within FR1, or may include intermediate band frequencies. Additionally, unless specifically stated otherwise, it should be understood that terms such as “millimeter wave” as used herein may broadly denote frequencies that may include intermediate band frequencies, may be within FR2, FR4, FR4-a, or FR4-1 and / or FR5, or may be within the EHF band. It should be taken into consideration that frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1 and / or FR5) may be modified, and that the technology described herein is applicable to modified frequency ranges.

[0039] In some embodiments, the UE (120) may include a communication manager (140). As described in more detail elsewhere in this invention, the communication manager (140) may transmit to a node a request for a security key for sidelink connectionless groupcast communication performed between UEs without a wireless resource control (RRC) connection (this request indicates the distance from the UE to use the security key) and may receive information representing the security key from the node. As described in more detail elsewhere in this invention, the communication manager (140) may receive from the node information representing a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection and may receive communication for a sidelink connectionless groupcast from another UE using the security key. Additionally or alternatively, the communication manager (140) may perform one or more other operations described herein.

[0040] In some embodiments, a node (e.g., base station (110)) may include a communication manager (150). As described in more detail elsewhere in this invention, the communication manager (150) may receive from a UE a request for a security key for sidelink connectionless groupcast communication performed without an RRC connection between UEs (the request indicates the distance from the UE to use the security key) and transmit information indicating the security key to the UE and at least one other UE within the distance of the UE. Additionally or alternatively, the communication manager (150) may perform one or more other operations described herein.

[0041] As mentioned above, FIG. 1 is provided as an example. Other examples may differ from those described in relation to FIG. 1.

[0042] FIG. 2 is a drawing illustrating an example (200) of a base station (110) communicating with a UE (120) in a wireless network (100) according to the present disclosure. The base station (110) may be equipped with a set of antennas (234a to 234t), such as T antennas (T≥1). The UE (120) may be equipped with a set of antennas (252a to 252r), such as R antennas (R≥1).

[0043] At the base station (110), the transmitting processor (220) may receive data intended for a UE (120) (or a set of UEs (120)) from a data source (212). The transmitting processor (220) may select one or more modulation and coding schemes (MCS) for the UE (120) based at least partially on one or more channel quality indicators (CQI) received from the UE (120). The base station (110) may process data for the UE (120) (e.g., encoding and modulation) based at least partially on the MCS(s) selected for the UE (120) and may provide data symbols to the UE (120). The transmitting processor (220) may process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, acknowledgments, and / or upper-layer signaling) and provide overhead symbols and control symbols. The transmitting processor (220) can generate reference symbols for a reference signal (e.g., cell-specific reference signal (CRS) or demodulation reference signal (DMRS)) and a synchronization signal (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). The transmitting (TX) multiple-input multiple-output (MIMO) processor (230) can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols where applicable, and can provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems (232) (e.g., T modems) illustrated as modems (232a to 232t). For example, each output symbol stream can be provided to a modulator component (illustrated as MOD) of the modem (232). Each modem (232) can obtain an output sample stream by processing each output symbol stream (e.g., for OFDM) using each modulator component.Each modem (232) may further use its respective modulator component to process the output sample stream (e.g., convert to analog, amplify, filter, and / or upconvert) to obtain a downlink signal. The modems (232a to 232t) may transmit a set of downlink signals (e.g., T downlink signals) through a set of corresponding antennas (234) (e.g., T antennas) illustrated as antennas (234a to 234t).

[0044] In the UE (120), a set of antennas (252) (illustrated as antennas (252a to 252r)) can receive downlink signals from a base station (110) and / or another base station (110) and can provide a set of received signals (e.g., R received signals) to a set of modems (254) (e.g., R modems) illustrated as modems (254a to 254r). For example, each received signal can be provided to a demodulator component (illustrated as DEMOD) of a modem (254). Each modem (254) can use its respective demodulator component to obtain input samples by modulating (e.g., filtering, amplification, down-conversion, and / or digitization) the received signals. Each modem (254) can use its demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector (256) can obtain a symbol received from a modem (254), perform MIMO detection on the received symbol if applicable, and provide the detected symbol. A receiving processor (258) can process the detected symbol (e.g., demodulate and decode) and provide the decoded data for the UE (120) to a data sink (260), and provide the decoded control information and system information to a controller / processor (280). The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine, among other examples, a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a CQI parameter.In some examples, one or more components of the UE (120) may be included in the housing (284).

[0045] The network controller (130) may include a communication unit (294), a controller / processor (290), and a memory (292). The network controller (130) may include, for example, one or more devices of a core network. The network controller (130) may communicate with the base station (110) through the communication unit (294).

[0046] One or more antennas (e.g., antennas (234a to 234t) and / or antennas (252a to 252r)) may include, among other examples, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays, or may be contained therein. The antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include one or more antenna elements (in a single housing or multiple housings), sets of coplanar antenna elements, sets of nonplanar antenna elements, and / or one or more antenna elements coupled to one or more transmitting and / or receiving components such as one or more components of FIG. 2.

[0047] In the uplink, in the UE (120), the transmitting processor (264) may receive and process data from the data source (262) and may receive and process control information from the controller / processor (280) (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmitting processor (264) may generate reference symbols for one or more reference signals. Symbols from the transmitting processor (264) may be precoded by the TX MIMO processor (266), where applicable, and may be further processed by the modem (254) (e.g., in the case of DFT-s-OFDM or CP-OFDM) and transmitted to the base station (110). In some examples, the modem (254) of the UE (120) may include a modulator and a demodulator. In some examples, the UE (120) includes a transceiver. The transceiver may include any combination of antenna(s) (252), modem(s) (254), MIMO detector (256), receiving processor (258), transmitting processor (264), and / or TX MIMO processor (266). The transceiver may be used to perform any aspect of the method described herein (e.g., with reference to FIGS. 5 through 10) by means of a processor (e.g., controller / processor (280)) and memory (282).

[0048] At the base station (110), uplink signals from the UE (120) and / or other UEs are received by antennas (234), processed by a modem (232) (e.g., a demodulator component of the modem (232), illustrated as DEMOD), detected by a MIMO detector (236) where applicable, and further processed by a receiving processor (238) to obtain decoded data and control information transmitted by the UE (120). The receiving processor (238) may provide the decoded data to a data sink (239) and provide the decoded control information to a controller / processor (240). The base station (110) may include a communication unit (244) and may communicate with a network controller (130) through the communication unit (244). The base station (110) may include a scheduler (246) for scheduling one or more UEs (120) for downlink and / or uplink communication. In some examples, the modem (232) of the base station (110) may include a modulator and a demodulator. In some examples, the base station (110) includes a transceiver. The transceiver may include any combination of antenna(s) (234), modem(s) (232), MIMO detector (236), receiving processor (238), transmitting processor (220), and / or TX MIMO processor (230). The transceiver may be used to perform any aspect of any method described herein (e.g., with reference to FIGS. 5 through 10) by means of a processor (e.g., controller / processor (240)) and memory (242).

[0049] The controller / processor (240) of the base station (110), the controller / processor (280) of the UE (120), and / or any other component(s) of FIG. 2 may perform one or more techniques associated with sidelink connectionless groupcast communication using a security key as described in more detail elsewhere in this invention. In some embodiments, the node described herein is the base station (110), is included in the base station (110), or includes one or more components of the base station (110) shown in FIG. 2. In some embodiments, the node described herein is the UE (120), is included in the UE (120), or includes one or more components of the UE (120) shown in FIG. 2. For example, the controller / processor (240) of the base station (110), the controller / processor (280) of the UE (120), and / or any other component(s) of FIG. 2 may perform or direct the operation of, for example, the process (600) of FIG. 6, the process (700) of FIG. 7, the process (800) of FIG. 8, and / or other processes as described herein. The memory (242) and the memory (282) may store data and program codes for the base station (110) and the UE (120), respectively. In some examples, the memory (242) and / or the memory (282) may include a non-transient computer-readable medium that stores one or more instructions (e.g., code and / or program code) for wireless communication. For example, when one or more instructions are executed by one or more processors of the base station (110) and / or UE (120) (e.g., directly, or after compiling, converting, and / or interpreting), one or more processors, UE (120), and / or base station (110) may direct or perform the operation of, for example, the process (600) of FIG. 6, the process (700) of FIG. 7, the process (800) of FIG. 8, and / or other processes as described herein.In some examples, executing instructions may include, among other examples, running instructions, converting instructions, compiling instructions, and / or interpreting instructions.

[0050] In some embodiments, the UE includes means for transmitting to a node a request for a security key for sidelink connectionless groupcast communication performed without an RRC connection between UEs (the request indicates a distance from the UE to use the security key); and / or means for receiving from the node information representing the security key. In some embodiments, the UE includes means for receiving from the node information representing a security key for sidelink connectionless groupcast communication performed without an RRC connection between UEs; and / or means for receiving from another UE communication for a sidelink connectionless groupcast using the security key. Means for the UE to perform the operations described herein may include, for example, one or more of a communication manager (140), an antenna (252), a modem (254), a MIMO detector (256), a receiving processor (258), a transmitting processor (264), a TX MIMO processor (266), a controller / processor (280), or a memory (282).

[0051] In some embodiments, the node includes means for receiving from a UE a request for a security key for sidelink connectionless groupcast communication performed without an RRC connection between UEs (the request indicates a distance from the UE to use the security key); and / or means for transmitting information indicating the security key to at least one other UE within a distance of the UE. In some embodiments, the means for the node to perform the operations described herein may include, for example, one or more of a communication manager (150), a transmitting processor (220), a TX MIMO processor (230), a modem (232), an antenna (234), a MIMO detector (236), a receiving processor (238), a controller / processor (240), a memory (242), or a scheduler (246). In some embodiments, the means for the node to perform the operations described herein may include, for example, one or more of a communication manager (140), an antenna (252), a modem (254), a MIMO detector (256), a receiving processor (258), a transmitting processor (264), a TX MIMO processor (266), a controller / processor (280), or a memory (282).

[0052] Although the blocks of FIG. 2 are exemplified as separate components, the functions described above for the blocks may be implemented as a single hardware, software, or combination component, or as various combinations of components. For example, the functions described for the transmit processor (264), receive processor (258), and / or TX MIMO processor (266) may be performed by or under the control of the controller / processor (280).

[0053] As mentioned above, FIG. 2 is provided as an example. Other examples may differ from those described in relation to FIG. 2.

[0054] FIG. 3 is a drawing illustrating an example (300) of side link communications according to the present disclosure.

[0055] As illustrated in FIG. 3, the first UE (305-1) can communicate with the second UE (305-2) (and one or more other UEs (305)) through one or more sidelink channels (310). The UEs (305-1 and 305-2) can communicate using one or more sidelink channels (310) for 2P communication, D2D communication, V2X communication (e.g., V2V communication, V2I communication and / or V2P communication), and / or mesh networking. In some examples, the UE (305) (e.g., UE (305-1) and / or UE (305-2)) may correspond to one or more other UEs described elsewhere in the invention, such as UE (120). In some examples, one or more sidelink channels (310) may use a PC5 interface and / or may operate in a high frequency band (e.g., 5.9 GHz band). Additionally or alternatively, the UE (305) can use Global Navigation Satellite System (GNSS) timing to synchronize the timing of transmission time intervals (TTIs) (e.g., frames, subframes, slots, or symbols). In some examples, the UE (305) may be a roadside unit (RSU) of traffic infrastructure (e.g., on a traffic light, on a traffic intersection, etc.).

[0056] As additionally illustrated in FIG. 3, one or more sidelink channels (310) may include a physical sidelink control channel (PSCCH) (315), a physical sidelink shared channel (PSSCH) (320), and / or a physical sidelink feedback channel (PSFCH) (325). The PSCCH (315) may be used to communicate control information similarly to a physical downlink control channel (PDCCH) and / or a physical uplink control channel (PUCCH) used for cellular communication with a base station (110) via a connection link or connection channel. The PSSCH (320) may be used to communicate data similarly to a physical downlink shared channel (PDSCH) and / or a physical uplink shared channel (PUSCH) used for cellular communication with a base station (110) via a connection link or connection channel. For example, the PSCCH (315) may carry sidelink control information (SCI) (330) which may represent various control information used in sidelink communication, such as one or more resources (e.g., time resources, frequency resources, and / or spatial resources) that can be carried back via the PSSCH (320) in a transmit block (TB) (335). The TB (335) may contain data. The PSFCH (325) may be used to communicate sidelink feedback (340), such as hybrid automatic repeat request (HARQ) feedback (e.g., acknowledgment or acknowledgment of acknowledgment (ACK / NACK) information), transmit power control (TPC), and / or scheduling request (SR).

[0057] Although illustrated on PSCCH (315), in some embodiments, SCI (330) may include multiple communications at different stages, such as a first stage SCI (SCI-1) and a second stage SCI (SCI-2). SCI-1 may be transmitted via PSCCH (315). SCI-2 may be transmitted via PSSCH (320) (e.g., together with TB (335)). SCI-1 may include, for example, an indication of one or more resources on PSSCH (320) (e.g., time resources, frequency resources, and / or spatial resources), information for decoding sidelink communications on PSSCH, a quality of service (QoS) priority value, a resource reservation period, a PSSCH DMRS pattern, an SCI format for SCI-2, a beta offset for SCI-2, a number of PSSCH DMRS ports, and / or MCS. SCI-2 may include information associated with data transmission via PSSCH (320), such as a HARQ process ID, a New Data Indicator (NDI), a source identifier, a destination identifier, and / or a Channel State Information (CSI) reporting trigger.

[0058] In some examples, one or more sidelink channels (310) may use a resource pool. For example, a scheduling assignment (e.g., included in SCI (330)) may be transmitted over time in a subchannel using a specific resource block (RB). In some examples, a data transmission associated with a scheduling assignment (e.g. via PSSCH (320)) may occupy an adjacent RB in the same subframe as the scheduling assignment (e.g. using frequency division multiplexing). In some examples, the scheduling assignment and the associated data transmission are not transmitted through an adjacent RB.

[0059] In some examples, the UE (305) may operate using a sidelink transmission mode (e.g., Mode 1) in which resource selection and / or scheduling is performed by the base station (110). For example, the UE (305) may receive an acknowledgment from the base station (110) for sidelink channel access and / or scheduling (e.g., in a configured acknowledgment in the DCI (Downlink Control Information) or in an RRC message). In some examples, the UE (305) may operate using a transmission mode (e.g., Mode 2) in which resource selection and / or scheduling is performed by the UE (305) (e.g., rather than the base station (110)). In some examples, the UE (305) may perform resource selection and / or scheduling by detecting channel availability for transmission. For example, the UE (305) can measure RSSI parameters associated with various sidelink channels (e.g., sidelink-RSSI (S-RSSI) parameters), measure RSRP parameters associated with various sidelink channels (e.g., PSSCH-RSRP parameters), and / or measure RSRQ parameters associated with various sidelink channels (e.g., PSSCH-RSRQ parameters), and can select a channel for transmitting sidelink communication based at least partially on the measurement(s).

[0060] Additionally or alternatively, the UE (305) may perform resource selection and / or scheduling using the SCI (330) received from the PSCCH (315), which may indicate occupied resources and / or channel parameters. Additionally or alternatively, the UE (305) may perform resource selection and / or scheduling by determining the channel busy rate (CBR) associated with various sidelink channels that may be used for rate control (e.g., by indicating the maximum number of resource blocks available to the UE (305) for a specific set of subframes).

[0061] In a transmission mode where resource selection and / or scheduling is performed by the UE (305), the UE (305) may generate a sidelink acknowledgment and transmit the acknowledgment in the SCI (330). The sidelink acknowledgment may represent, for example, one or more resource blocks to be used for the incoming sidelink transmission via the PSSCH (320) (e.g., for the TB (335)), one or more subframes to be used for the incoming sidelink transmission, and / or one or more parameters to be used for the incoming sidelink transmission (e.g., transmission parameters), such as the MCS to be used for the incoming sidelink transmission. In some examples, the UE (305) may generate a sidelink acknowledgment representing one or more parameters for semi-permanent scheduling (SPS), such as the periodicity of the sidelink transmission. Additionally, or alternatively, the UE (305) may generate a sidelink acknowledgment for event-based scheduling, such as an on-demand sidelink message.

[0062] Sidelink communication may include unicast communication, groupcast communication, and / or broadcast communication. For example, SCI (330) may be transmitted via broadcast. Thus, any UE capable of sidelink communication can decode SCI (330) regardless of whether the UE is the intended recipient of SCI (330).

[0063] As mentioned above, FIG. 3 is provided as an example. Other examples may differ from those described in relation to FIG. 3.

[0064] FIG. 4 is a diagram illustrating an example (400) of side link communications and access link communications according to the present disclosure.

[0065] As illustrated in FIG. 4, the transmitter (Tx) / receiver (Rx) UE (405) and the Rx / Tx UE (410) can communicate with each other via a side link as described above in relation to FIG. 3. Additionally, as illustrated, in some side link modes, the base station (110) can communicate with the Tx / Rx UE (405) via a first access link. Additionally or alternatively, in some side link modes, the base station (110) can communicate with the Rx / Tx UE (410) via a second access link. The Tx / Rx UE (405) and / or the Rx / Tx UE (410) may correspond to one or more UEs described elsewhere in the invention, such as the UE (120) of FIG. 1. Accordingly, a direct link between UEs (120) (e.g., via a PC5 interface) may be referred to as a side link, and a direct link between a base station (110) and a UE (120) (e.g., via a Uu interface) may be referred to as a connection link. Side link communication may be transmitted via the side link, and connection link communication may be transmitted via the connection link. Connection link communication may be downlink communication (from the base station (110) to the UE (120)) or uplink communication (from the UE (120) to the base station (110).

[0066] As mentioned above, FIG. 4 is provided as an example. Other examples may differ from those described in relation to FIG. 4.

[0067] A UE can communicate using a sidelink connectionless group cast (e.g., in RRC idle mode or RRC connected mode). Here, the transmitter UE can form a virtual group with other UEs within a threshold distance of the transmitter UE. However, in a connectionless group cast, there is no RRC connection between the transmitter UE (305) and the other UEs in the virtual group. Therefore, a connectionless group cast can be useful when the transmitter UE (305) (e.g., a vehicle UE) is mobile, and the information transmitted by the transmitter UE (305) (e.g., a collision warning) is intended only for other UEs (e.g., other vehicle UEs) near the transmitter UE (305). In a connectionless group cast, feedback for transmission may be provided only as a negative acknowledgment (NACK) (e.g., assuming an acknowledgment (ACK) if no NACK is transmitted), or feedback may be provided as an ACK or a NACK.

[0068] The resource for transmitting feedback (e.g., NACK or ACK / NACK) may be based at least partially on the source identifier associated with the transmitter UE (305) (e.g., indicated in SCI-2) and the subchannel used for transmission. The source identifier in SCI-2 may not be secure (e.g., may not be encrypted), and thus a malicious UE may determine the resource for transmitting feedback and transmit spoofed feedback from that resource. However, UEs participating in a connectionless group cast cannot use RRC signaling to reach a security key consensus because there is no RRC connection between the UEs. Additionally, due to the mobility of the UE, key resets may need to be performed frequently to account for the UE moving toward or away from the transmitter UE (305).

[0069] Some of the technologies and devices described herein provide security key management for sidelink connectionless groupcast communication. In some embodiments, a transmitting UE may request a security key for connectionless groupcast from a node, such as a base station or RSU, and the node may respond with information representing the security key. Additionally, the node may provide information representing the security key to one or more receiver UEs within a threshold distance of the UE. In this way, the transmitting UE and the receiver UE(s) may use the security key to securely transmit and receive communications for connectionless groupcast, respectively.

[0070] FIG. 5 is a diagram illustrating an example (500) associated with side-link connectionless groupcast communication using a security key according to the present disclosure. As illustrated in FIG. 5, a node (505), a transmitter UE (305), and a receiver UE (305) can communicate with each other. The node (505) (e.g., a wireless communication node, a network node, etc.) may correspond to one or more base stations described elsewhere in the present invention, such as a base station (110), or an RSU described herein. If the node (505) is an RSU, the Uu signaling load may be offloaded to the PC5 interface, thereby conserving network resources. The transmitter UE (305) and / or receiver UE (305) may correspond to one or more UEs described elsewhere in the present invention, such as UE (120), UE (405), or UE (410). In some embodiments, the transmitter UE (305) and / or receiver UE (305) may be integrated into the vehicle and / or located within or on the vehicle. The vehicle may include, among other examples, an autonomous vehicle, a semi-autonomous vehicle, and / or a non-autonomous vehicle.

[0071] The transmitter UE (305) and the receiver UE (305) may communicate through one or more sidelink channels (310) as described above in relation to FIG. 3 (e.g., to exchange SCI (330) and the corresponding TB (335). As used herein, "transmitter UE" is used to describe a UE that schedules the transmission of a specific sidelink communication and transmits the specific sidelink communication to the receiver UE. As used herein, "receiver UE" is used to describe a UE that receives a specific sidelink communication from the transmitter UE. A single UE may operate as a transmitter UE (e.g., transmitting sidelink communication to other UEs) and a receiver UE (e.g., receiving sidelink communication from other UEs).

[0072] As illustrated by reference numeral 510, the transmitter UE (305) may transmit a request for a security key for a sidelink connectionless groupcast communication (e.g., which can be performed without an RRC connection between UEs (305)), and the node (505) may receive such a request. For example, the transmitter UE (305) may transmit a request if the transmitter UE (305) needs to perform one or more transmissions for a connectionless groupcast (e.g., this request indicates the transmitter UE (305)'s intention to perform a connectionless groupcast). Additionally, the transmitter UE (305) may transmit a request if one or more transmissions for a connectionless groupcast need to be secure (e.g., encrypted). For example, the application of the transmitter UE (305) (e.g., a V2X application) may indicate that transmissions associated with the application need to be secure.

[0073] In some embodiments, the request may indicate a distance from the transmitter UE (305) for using the security key. That is, the distance may define a communication range from the transmitter UE (305) where secure connectionless groupcast communication will be used (e.g., a communication range where secure communication will be performed). In some embodiments, the request may not indicate a distance, and a default distance may be assumed for the request.

[0074] As illustrated by reference numeral 515, the transmitter UE (305) may transmit a report of the location of the transmitter UE (305), and the node (505) may receive such a report. Additionally, as illustrated by reference numeral 515, the receiver UE (305) may transmit a report indicating the location of the receiver UE (305), and the node (505) may receive such a report. Additionally, one or more additional receiver UEs (305) may transmit location reports to the node (505). The UE (305) may transmit location reports to the node (505) periodically (e.g., depending on the configuration for location reporting) or non-periodically. Additionally, the UE (305) may transmit location reports to the node (505) before and / or after a request from the transmitter UE (305) (e.g., the timing of the location report may not be related to the timing of the request).

[0075] As illustrated by reference numeral 520, the node (505) may transmit information representing a security key for a sidelink connectionless groupcast communication (e.g., for a current connectionless groupcast session), and the transmitter UE (305) may receive such information. Additionally, as illustrated by reference numeral 520, the receiver UE (305) may receive information representing a security key (e.g., multiple receiver UEs (305) may receive such information). The node (505) may transmit information representing a security key to the receiver UE (305) when the receiver UE (305) is within a threshold distance of the transmitter UE (305) (e.g., when the distance between the transmitter UE (305) and the receiver UE (305) is less than or equal to the threshold distance). For example, the threshold distance may be the distance indicated in a request from the transmitter UE (305). In this way, security key distribution by the node (505) is performed only on a subset of all possible receiver UEs (305) (e.g., an appropriate subset) depending on the location of the transmitter UE (305) and the receiver UE (305).

[0076] In some embodiments, the node (505) may determine whether the receiver UE (305) is within a threshold distance of the transmitter UE (305) by using a report indicating the location of the receiver UE (305) and / or a report indicating the location of the transmitter UE (305). In some embodiments, the node (505) may obtain location information for the transmitter UE (305) and / or the receiver UE (305) from a location management entity of the network (e.g., a location management function server). In some embodiments, the node (505) may determine whether the receiver UE (305) is within a threshold distance of the transmitter UE (305) by using the location information. In some embodiments, the node (505) may verify the location reported by the UE (305) using the location information (e.g., to detect location spoofing and ensure that security keys are configured only for the appropriate UEs). In some embodiments, the node (505) can determine the location of the UE (305) using location information of the UE (305) and the reported location. For example, the node (505) can estimate the location of the UE (305) based at least partially on location information of the UE (305) and the reported location of the UE (305) (for example, the location may be jointly estimated based at least partially on location information from a location management entity and a report indicating the location).

[0077] In some embodiments, information representing a security key is the security key (K g ) may be. That is, the node (505) may represent the actual security key to be used in the current connectionless groupcast session. In some embodiments, the information may be a parameter (p) used to derive the security key. Here, the node (505) represents all UEs (305) upon network connection using a common security key (K SLIt can be configured as follows, and the node (505) can configure parameters used to derive a security key only for UEs (305) that are in a connectionless groupcast session (e.g., one or more receiver UEs (305) within a threshold distance of the transmitter UE (305)). In some embodiments, the UE (305) is configured with an induction function (e.g., K g = KDF(K SL , p), where KDF is the derivation function), using the common security key (K SL Based at least partially on the security key (K) and parameter (p). g ) can be derived. In some embodiments, the node (505) can construct an induction function for the UE (305). Thus, when the size of the security key is large compared to the parameter, signaling overhead is reduced by indicating the parameter rather than the security key, especially when key resets are performed frequently (e.g., due to UE mobility).

[0078] As illustrated by reference numeral 525, a transmitter UE (305) may transmit communications for a sidelink disconnected group cast (e.g., SCI, TB, etc.) using a security key, and a receiver UE (305) may receive such communications (e.g., multiple receiver UEs (305) may receive such communications). For example, a receiver UE (305) may receive communications if the receiver UE (305) is within a threshold distance of the transmitter UE (305). In some embodiments, the transmitter UE (305) may encode communications (e.g., PSSCH) using a security key, and the receiver UE (305) may decode such communications. In some embodiments, the transmitter UE (305) may encode information of the communications (e.g., transmitter source identifier) ​​using a security key, and the receiver UE (305) may decode such information.

[0079] As illustrated by reference number 530, the node (505) may transmit a configuration indicating that a message of the random access procedure will be used for location reporting, and a receiver UE (305) may receive this configuration (e.g., multiple receiver UEs (305) may receive this configuration). For example, the message of the random access procedure may be a message A (msgA) communication of the two-stage random access procedure (e.g., a communication combining a random access preamble and a random access payload, such as an RRC connection request).

[0080] Based at least partially on the configuration, the receiver UE (305) may transmit a random access preamble and location information as part of a random access message (e.g., a report of the receiver UE (305)'s location is in the message of the random access procedure), and the node (505) may receive such random access preamble and location information. The node (505) may transmit the configuration to the receiver UE (305) when the receiver UE (305) is within a threshold distance of the transmitter UE (305) and / or when the receiver UE (305) is operating in an idle mode (e.g., RRC idle mode) with the node (505) (e.g., if the receiver UE (305) needs to periodically transition to an RRC connection mode for location reporting). In this way, the receiver UE (305) may use the random access message for location reporting without establishing an exclusive RRC connection with the node (505) solely for location reporting. In some embodiments, the transmitter UE (305) may receive from the node a configuration indicating that a message of the random access procedure will be used for location reporting, as described herein.

[0081] As illustrated by reference numeral 535, a node (505) may transmit a configuration or activation for unauthorized transmission to be used for location reporting, and a receiver UE (305) may receive such configuration or activation (e.g., multiple receiver UEs (305) may receive it). The unauthorized transmission may be a first type (referred to as Type 1) in which the unauthorized uplink data transmission is based at least partially on any layer 1 (L1) signaling-free RRC (re)configuration, or the unauthorized transmission may be a second type (referred to as Type 2) in which the unauthorized uplink data transmission is based at least partially on both the RRC configuration and L1 signaling for enabling or disabling the unauthorized transmission.

[0082] Accordingly, based at least partially on the configuration and / or activation, the receiver UE (305) may transmit location information as a resource for unacknowledged transmission. The node (505) may transmit the configuration or activation to the receiver UE (305) when the receiver UE (305) is within a threshold distance of the transmitter UE (305) and / or when the receiver UE (305) is operating in a connection mode with the node (505) (e.g., RRC connection mode). For example, the node (505) may transmit the activation of unacknowledged transmission when the receiver UE (305) is within the threshold distance of the transmitter UE (305) and / or the node (505) may transmit the deactivation of unacknowledged transmission when the receiver UE (305) is beyond the threshold distance from the transmitter UE (305). In this way, performing unacknowledged transmission reduces the Uu signaling overhead associated with location reporting. In some embodiments, the transmitter UE (305) may receive from the node a configuration or activation for unauthorized transmission to be used for location reporting as described herein.

[0083] In some embodiments, the node (505) may transmit a configuration for location reporting and / or a configuration or activation for unauthorized transmission using random access messages to the receiver UE (305) or the transmitter UE (305) at any time after a request for a security key from the transmitter UE (305). For example, the node (505) may transmit a configuration for location reporting and / or a configuration or activation for unauthorized transmission using random access messages to the receiver UE (305) based at least partially on a determination that the receiver UE (305) is within a threshold distance of the transmitter UE (305). Using unauthorized transmission and / or random access messages for location reporting facilitates location reporting with higher frequency and reduced signaling overhead.

[0084] In some embodiments, the transmitter UE (305) may transmit a new report of the transmitter UE (305)'s location to the node (505) and / or the receiver UE (305) may transmit a new report of the receiver UE (305)'s location to the node (505). As described herein, the transmitter UE (305) may transmit a new location report as a message for a random access procedure or as a resource for unauthorized transmission, and / or the receiver UE (305) may transmit a new location report as a message for a random access procedure or as a resource for unauthorized transmission. In some embodiments, the new location report of the transmitter UE (305) and / or the new location report of the receiver UE (305) may indicate that the receiver UE (305) is no longer within a threshold distance of the transmitter UE (305) (e.g., due to movement of the transmitter UE (305) and / or the receiver UE (305). Here, the node (505) may transmit information representing a new security key (e.g., the information may actually be a new security key or a parameter for deriving a new security key) to one or more receiver UEs (305) within a threshold distance of the transmitter UE (305) and / or to one or more receiver UEs (305) that have entered the threshold distance of the transmitter UE (305). In this way, the security key may be refreshed as the receiver UE (305) leaves or enters the secure communication range of the transmitter UE (305), thereby facilitating secure connectionless groupcast communication only among the UEs (305) within the secure communication range.

[0085] As mentioned above, FIG. 5 is provided as an example. Other examples may differ from those described in relation to FIG. 5.

[0086] FIG. 6 is a drawing illustrating an exemplary process (600) performed, for example, by a UE according to the present disclosure. The exemplary process (600) is an example in which a UE (e.g., UE (120)) performs an operation associated with sidelink disconnected groupcast communication using a security key.

[0087] As illustrated in FIG. 6, in some embodiments, the process (600) may include the step of transmitting to a node a request for a security key for sidelink connectionless groupcast communication performed without an RRC connection between UEs, the request indicating a distance from the UE to use the security key (block (610)). A UE (e.g., using the communication manager (140) and / or transmission component (904) illustrated in FIG. 9) may transmit to a node a request for a security key for sidelink connectionless groupcast communication performed without an RRC connection between UEs, as described above, the request indicating a distance from the UE to use the security key.

[0088] As additionally illustrated in FIG. 6, in some embodiments, the process (600) may include the step (block (620)) of receiving information representing a security key from a node. For example, a UE (using, for example, the communication manager (140) and / or receiving component (902) illustrated in FIG. 9) may receive information representing a security key from a node as described above.

[0089] The process (600) may include additional modes, such as any single mode or any combination of modes related to one or more other processes described below and / or described elsewhere in this invention.

[0090] In a first embodiment, the process (600) includes the step of transmitting communication for a sidelink disconnected group cast using a security key (e.g., using the communication manager (140) and / or transmission component (904) shown in FIG. 9).

[0091] In the second embodiment, alone or in combination with the first embodiment, the information is a security key.

[0092] In the third embodiment, alone or in combination with one or more of the first and second embodiments, the information is a parameter used to derive the security key.

[0093] In a fourth embodiment, alone or in combination with one or more of the first to third embodiments, the process (600) includes the step of transmitting a report indicating the location of the UE to a node (e.g., using the communication manager (140) and / or transmission component (904) shown in FIG. 9).

[0094] In the fifth embodiment, alone or in combination with one or more of the first to fourth embodiments, the report is in a message regarding a random access procedure.

[0095] In the sixth embodiment, alone or in combination with one or more of the first to fifth embodiments, the report is transmitted as a resource for unauthorized transmission.

[0096] In the seventh embodiment, alone or in combination with one or more of the first to sixth embodiments, the process (600) includes the step of receiving from a node a configuration indicating that a message of a random access procedure will be used for location reporting (e.g., using the communication manager (140) and / or receiving component (902) shown in FIG. 9).

[0097] In the eighth embodiment, alone or in combination with one or more of the first to seventh embodiments, the process (600) includes the step of receiving from a node a configuration or activation for unauthorized transmission to be used for location reporting (e.g., using the communication manager (140) and / or receiving component (902) shown in FIG. 9).

[0098] In the ninth embodiment, alone or in combination with one or more of the first to eighth embodiments, the node is a base station or a roadside unit.

[0099] Although FIG. 6 illustrates exemplary blocks of process (600), in some embodiments, process (600) may include additional blocks, fewer blocks, different blocks, or blocks arranged differently than those illustrated in FIG. 6. Additionally, or alternatively, two or more of the blocks of process (600) may be performed in parallel.

[0100] FIG. 7 is a drawing illustrating an exemplary process (700) performed, for example, by a node according to the present disclosure. The exemplary process (700) is an example in which a node (e.g., base station (110), RSU, etc.) performs an operation associated with sidelink disconnected groupcast communication using a security key.

[0101] As illustrated in FIG. 7, in some embodiments, the process (700) may include the step of receiving from a UE a request for a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection, and the request indicates a distance from the UE to use the security key (block (710)). As described above, for example, a node (using the communication manager (150) and / or receiving component (1002) illustrated in FIG. 10, e.g.,) may receive from a UE a request for a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection, and the request indicates a distance from the UE to use the security key.

[0102] As additionally illustrated in FIG. 7, in some embodiments, the process (700) may include the step (block (720)) of transmitting information representing a security key to the UE and at least one other UE within a distance of the UE. As previously described, for example, a node (using the communication manager (150) and / or transmission component (1004) illustrated in FIG. 10, e.g.) may transmit information representing a security key to the UE and at least one other UE within a distance of the UE.

[0103] The process (700) may include additional modes, such as any single mode or any combination of modes related to one or more other processes described below and / or described elsewhere in this invention.

[0104] In the first embodiment, the information is a security key.

[0105] In the second embodiment, alone or in combination with the first embodiment, the information is a parameter used to derive the security key.

[0106] In a third embodiment, alone or in combination with one or more of the first and second embodiments, the process (700) comprises the steps of receiving a first report from a UE indicating the location of the UE (e.g., using the communication manager (150) and / or receiving component (1002) illustrated in FIG. 10) and receiving a second report from the at least one other UE indicating the location of the UE (e.g., using the communication manager (150) and / or receiving component (1002) illustrated in FIG. 10).

[0107] In the fourth embodiment, alone or in combination with one or more of the first to third embodiments, at least one of the first report or the second report is in the message of the random access procedure.

[0108] In the fifth embodiment, alone or in combination with one or more of the first to fourth embodiments, at least one of the first report or the second report is received as a resource for unauthorized transmission.

[0109] In the sixth embodiment, alone or in combination with one or more of the first to fifth embodiments, the process (700) includes the step of transmitting a configuration to a UE or at least one other UE indicating that a message of a random access procedure will be used for location reporting (e.g., using the communication manager (150) and / or transmission component (1004) shown in FIG. 10).

[0110] In the seventh embodiment, alone or in combination with one or more of the first to sixth embodiments, the process (700) includes the step of transmitting a configuration or activation for unauthorized transmission to be used for location reporting to a UE or at least one other UE (e.g., using the communication manager (150) and / or transmission component (1004) shown in FIG. 10).

[0111] In the eighth embodiment, alone or in combination with one or more of the first to seventh embodiments, the process (700) includes the step of obtaining location information for a UE or at least one of at least one other UE from a location management entity (e.g., using the communication manager (150) and / or location component (1010) illustrated in FIG. 10).

[0112] In the ninth embodiment, alone or in combination with one or more of the first to eighth embodiments, the process (700) includes the step of verifying a location reported by a UE or at least one of at least one other UE using location information from a location management entity (e.g., using the communication manager (150) and / or location component (1010) illustrated in FIG. 10).

[0113] In the 10th embodiment, alone or in combination with one or more of the 1st to 9th embodiments, the process (700) includes the step of determining the location of at least one of a UE or at least one other UE using location information and a reported location from a location management entity (e.g., using the communication manager (150) and / or location component (1010) illustrated in FIG. 10).

[0114] In the 11th embodiment, alone or in combination with one or more of the 1st to 10th embodiments, the node is a base station or a roadside unit.

[0115] FIG. 7 illustrates an exemplary block of process (700), but in some embodiments, process (700) may include additional blocks, fewer blocks, different blocks, or blocks arranged differently than illustrated in FIG. 7. Additionally, or alternatively, two or more of the blocks of process (700) may be performed in parallel.

[0116] FIG. 8 is a drawing illustrating an exemplary process (800) performed, for example, by a UE according to the present disclosure. The exemplary process (800) is an example in which a UE (e.g., UE (120)) performs an operation associated with sidelink disconnected groupcast communication using a security key.

[0117] As illustrated in FIG. 8, in some embodiments, the process (800) may include the step (block (810)) of receiving from a node information representing a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection. For example, a UE (using, for example, the communication manager (140) and / or receiving component (902) illustrated in FIG. 9) may receive from a node information representing a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection, as described above.

[0118] As additionally illustrated in FIG. 8, in some embodiments, the process (800) may include the step (block (820)) of receiving communication for a sidelink disconnected groupcast from another UE using a security key. For example, a UE (using the communication manager (140) and / or receiving component (902) illustrated in FIG. 9, for example) may receive communication for a sidelink disconnected groupcast from another UE using a security key as described above.

[0119] The process (800) may include additional modes, such as any single mode or any combination of modes related to one or more other processes described below and / or described elsewhere in this invention.

[0120] In the first embodiment, if the UE is within the distance of the other UE indicated by the other UE, information is received.

[0121] In the second embodiment, alone or in combination with the first embodiment, the information is a security key.

[0122] In the third embodiment, alone or in combination with one or more of the first and second embodiments, the information is a parameter used to derive the security key.

[0123] In a fourth embodiment, alone or in combination with one or more of the first to third embodiments, the process (800) includes the step of transmitting a report of the UE's location to a node (e.g., using the communication manager (140) and / or transmission component (904) shown in FIG. 9).

[0124] In the fifth embodiment, alone or in combination with one or more of the first to fourth embodiments, the report is in a message regarding a random access procedure.

[0125] In the sixth embodiment, alone or in combination with one or more of the first to fifth embodiments, the report is transmitted as a resource for unauthorized transmission.

[0126] In the seventh embodiment, alone or in combination with one or more of the first to sixth embodiments, the process (800) includes the step of receiving from a node a configuration indicating that a message of a random access procedure will be used for location reporting (e.g., using the communication manager (140) and / or receiving component (902) shown in FIG. 9).

[0127] In the eighth embodiment, alone or in combination with one or more of the first to seventh embodiments, the process (800) includes the step of receiving from a node a configuration or activation for an unauthorized transmission to be used for location reporting (e.g., using the communication manager (140) and / or receiving component (902) shown in FIG. 9).

[0128] In the ninth embodiment, alone or in combination with one or more of the first to eighth embodiments, the node is a base station or a roadside unit.

[0129] FIG. 8 illustrates an exemplary block of process (800), but in some embodiments, process (800) may include additional blocks, fewer blocks, different blocks, or blocks arranged differently than illustrated in FIG. 8. Additionally, or alternatively, two or more of the blocks of process (800) may be performed in parallel.

[0130] FIG. 9 is a drawing of an exemplary device (900) for wireless communication. The device (900) may be a UE, or a UE may include the device (900). In some embodiments, the device (900) includes a receiving component (902) and a transmitting component (904) that can communicate with each other (e.g., via one or more buses and / or one or more other components). As illustrated, the device (900) may communicate with another device (906) (such as a UE, a base station, or another wireless communication device) using the receiving component (902) and the transmitting component (904). Additionally, as illustrated, the device (900) may include a communication manager (140). The communication manager (140) may include, among other examples, an encryption / decryption component (908).

[0131] In some embodiments, the device (900) may be configured to perform one or more operations described herein in relation to FIG. 5. Additionally or alternatively, the device (900) may be configured to perform one or more processes described herein, such as the process (600) of FIG. 6, the process (800) of FIG. 8, or a combination thereof. In some embodiments, the device (900) and / or one or more components shown in FIG. 9 may include one or more components of the UE described in relation to FIG. 2. Additionally or alternatively, one or more components shown in FIG. 9 may be implemented within one or more components described in relation to FIG. 2. Additionally or alternatively, one or more components of the set of components may be implemented at least partially as software stored in memory. For example, a component (or part of a component) may be implemented as instructions or code stored on a non-transient computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0132] A receiving component (902) may receive communication from the device (906), such as a reference signal, control information, data communication, or a combination thereof. The receiving component (902) may provide the received communication to one or more other components of the device (900). In some embodiments, the receiving component (902) may perform signal processing on the received communication (such as, among other examples, filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference removal, or decoding) and provide the processed signal to one or more other components of the device (900). In some embodiments, the receiving component (902) may include one or more antennas, modems, demodulators, MIMO detectors, receiving processors, controllers / processors, memory, or combinations thereof of the UE described in relation to FIG. 2.

[0133] The transmitting component (904) may transmit communication, such as a reference signal, control information, data communication, or a combination thereof, to the device (906). In some embodiments, one or more other components of the device (900) may generate communication and provide the generated communication to the transmitting component (904) for transmitting to the device (906). In some embodiments, the transmitting component (904) may perform signal processing on the generated communication (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) and transmit the processed signal to the device (906). In some embodiments, the transmitting component (904) may include one or more antennas, modems, modulators, transmitting MIMO processors, transmitting processors, controllers / processors, memory, or combinations thereof of the UE described in relation to FIG. 2. In some embodiments, the transmitting component (904) may be positioned at the same location as the receiving component (902) in the transceiver.

[0134] In some embodiments, the transmitting component (904) may transmit to the node a request for a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection, and the request indicates the distance from the device (900) for using the security key. The receiving component (902) may receive information indicating the security key from the node.

[0135] The encryption / decryption component (908) can encode communication for a sidelink connectionless groupcast using a security key. The transmission component (904) can transmit communication for a sidelink connectionless groupcast using a security key. The transmission component (904) can transmit a report indicating the location of the device (900) to the node. The receiving component (902) can receive a configuration from the node indicating that a message of a random access procedure will be used for location reporting. The receiving component (902) can receive a configuration or activation from the node for unauthorized transmission to be used for location reporting.

[0136] In some embodiments, the receiving component (902) may receive from a node information representing a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection. The receiving component (902) may receive communication for the sidelink connectionless groupcast from another UE using the security key. The encryption / decryption component (908) may decode the communication for the sidelink connectionless groupcast using the security key.

[0137] The transmitting component (904) can transmit a report of the UE's location to the node. The receiving component (902) can receive from the node a configuration indicating that a message of the random access procedure will be used for the location report. The receiving component (902) can receive from the node a configuration or activation for unauthorized transmission to be used for the location report.

[0138] The number and arrangement of the components shown in FIG. 9 are provided as an example. In practice, there may be additional components, fewer components, different components, or components arranged differently than shown in FIG. 9. Additionally, two or more components shown in FIG. 9 may be implemented within a single component, or a single component shown in FIG. 9 may be implemented as a plurality of distributed components. Furthermore, or alternatively, a set of (one or more) components shown in FIG. 9 may perform one or more functions described as being performed by another set of components shown in FIG. 9.

[0139] FIG. 10 is a drawing of an exemplary device (1000) for wireless communication. The device (1000) may be a base station, or a base station may include the device (1000). In some embodiments, the device (1000) includes a receiving component (1002) and a transmitting component (1004) that can communicate with each other (e.g., via one or more buses and / or one or more other components). As illustrated, the device (1000) may communicate with another device (1006) (e.g., a UE, a base station, or other wireless communication device) using the receiving component (1002) and the transmitting component (1004). Additionally, as illustrated, the device (1000) may include a communication manager (150). The communication manager (150) may include one or more of a security key component (1008) or a location component (1010), among other examples.

[0140] In some embodiments, the device (1000) may be configured to perform one or more operations described herein in relation to FIG. 5. Additionally or alternatively, the device (1000) may be configured to perform one or more processes described herein, such as the process (700) of FIG. 7, or a combination thereof. In some embodiments, the device (1000) and / or one or more components shown in FIG. 10 may include one or more components of a base station described in relation to FIG. 2. Additionally or alternatively, one or more components shown in FIG. 10 may be implemented within one or more components described in relation to FIG. 2. Additionally or alternatively, one or more components of a set of components may be implemented at least partially as software stored in memory. For example, a component (or part of a component) may be implemented as instructions or code that are stored on a non-transient computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0141] A receiving component (1002) may receive communication from a device (1006), such as a reference signal, control information, data communication, or a combination thereof. The receiving component (1002) may provide the received communication to one or more other components of the device (1000). In some embodiments, the receiving component (1002) may perform signal processing on the received communication (such as, among other examples, filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding) and provide the processed signal to one or more other components of the device (1000). In some embodiments, the receiving component (1002) may include one or more antennas of a base station described in relation to FIG. 2, a modem, a demodulator, a MIMO detector, a receiving processor, a controller / processor, a memory, or a combination thereof.

[0142] The transmitting component (1004) may transmit communication, such as a reference signal, control information, data communication, or a combination thereof, to the device (1006). In some embodiments, one or more other components of the device (1000) may generate communication and provide the generated communication to the transmitting component (1004) for transmission to the device (1006). In some embodiments, the transmitting component (1004) may perform signal processing on the generated communication (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) and transmit the processed signal to the device (1006). In some embodiments, the transmitting component (1004) may include one or more antennas of a base station described in relation to FIG. 2, a modem, a modulator, a transmission MIMO processor, a transmission processor, a controller / processor, a memory, or a combination thereof. In some embodiments, the transmitting component (1004) may be positioned at the same location as the receiving component (1002) in the transceiver.

[0143] A receiving component (1002) can receive a request from a UE for a security key for sidelink connectionless groupcast communication performed between UEs without an RRC connection, and the request indicates a distance from the UE for using the security key. A transmitting component (1004) can transmit information representing the security key to the UE and at least one other UE within a distance of the UE. A security key component (1008) can generate information representing the security key.

[0144] The receiving component (1002) may receive a first report from the UE indicating the location of the UE. The receiving component (1002) may receive a second report from at least one other UE indicating the location of that at least one other UE. The transmitting component (1004) may transmit a configuration to the UE or to at least one other UE indicating that a message of a random access procedure will be used for location reporting. The transmitting component (1004) may transmit a configuration or activation for unauthorized transmission to the UE or to at least one other UE to be used for location reporting.

[0145] The location component (1010) can obtain location information for at least one of the UE or at least one of the other UEs from a location management entity. The location component (1010) can verify the location reported by at least one of the UE or at least one of the other UEs using the location information from the location management entity. The location component (1010) can determine the location of at least one of the UE or at least one of the other UEs using the location information from the location management entity and the reported location.

[0146] The number and arrangement of components illustrated in FIG. 10 are provided as an example. In practice, there may be additional components, fewer components, different components, or components arranged differently than those illustrated in FIG. 10. Additionally, two or more components illustrated in FIG. 10 may be implemented within a single component, or a single component illustrated in FIG. 10 may be implemented as a plurality of distributed components. Furthermore, or alternatively, a set of (one or more) components illustrated in FIG. 10 may perform one or more functions described as being performed by another set of components illustrated in FIG. 10.

[0147] The following provides an overview of some aspects of the present disclosure:

[0148] Aspect 1: A wireless communication method performed by a user device (UE), comprising the step of transmitting to a node a request for a security key for sidelink connectionless groupcast communication performed between UEs without a wireless resource control connection, wherein the request indicates a distance from the UE to use the security key; and the step of receiving information indicating the security key from the node.

[0149] Aspect 2: A wireless communication method performed by a UE, wherein, in Aspect 1, the method further comprises the step of transmitting communication for a sidelink connectionless group cast using a security key.

[0150] Aspect 3: A wireless communication method performed by a UE, wherein the information is a security key in Aspect 1 or Aspect 2.

[0151] Aspect 4: A wireless communication method performed by a UE, wherein, in Aspect 1 or Aspect 2, the information is a parameter used to derive a security key.

[0152] Aspect 5: A wireless communication method performed by a UE, wherein, in any one of Aspects 1 to 4, the method further comprises the step of transmitting a report indicating the location of the UE to a node.

[0153] Aspect 6: In Aspect 5, a wireless communication method performed by the UE, in which the report is in a message regarding a random access procedure.

[0154] Aspect 7: A wireless communication method performed by a UE, wherein, in Aspect 5, the report is transmitted as a resource for unauthorized transmission.

[0155] Aspect 8: A wireless communication method performed by a UE, wherein, in any one of Aspects 1 to 7, the method further comprises the step of receiving from a node a configuration indicating that a message of a random access procedure will be used for location reporting.

[0156] Aspect 9: A wireless communication method performed by a UE, wherein, in any one of Aspects 1 to 8, the method further comprises the step of receiving from a node a configuration or activation for unauthorized transmission to be used for location reporting.

[0157] Aspect 10: A wireless communication method performed by a UE, wherein, in any one of Aspects 1 to 9, the node is a base station or a roadside unit.

[0158] Aspect 11: A wireless communication method performed by a node, comprising the steps of: receiving from a user device (UE) a request for a security key for sidelink connectionless groupcast communication performed between UEs without a wireless resource control connection, wherein the request indicates a distance from the UE for using the security key; and transmitting information indicating the security key to the UE and at least one other UE within a distance of the UE.

[0159] Aspect 12: A wireless communication method performed by a node, wherein the information is a security key in Aspect 11.

[0160] Aspect 13: A wireless communication method performed by a node, wherein the information is a parameter used to derive a security key in Aspect 11.

[0161] Aspect 14: A wireless communication method performed by a node, comprising, in any one of Aspects 11 to 13, the step of receiving a first report indicating the location of a UE from a UE; and the step of receiving a second report indicating the location of at least one other UE from the at least one other UE.

[0162] Aspect 15: A wireless communication method performed by a node in Aspect 14, wherein at least one of the first report or the second report is in a message of a random access procedure.

[0163] Aspect 16: A wireless communication method performed by a node in Aspect 14, wherein at least one of the first report or the second report is received as a resource for unauthorized transmission.

[0164] A wireless communication method performed by a node, wherein, in any one of Aspects 11 to 16, the method further comprises the step of transmitting to a UE or at least one other UE a configuration indicating that a message of a random access procedure will be used for location reporting.

[0165] Aspect 18: A wireless communication method performed by a node, wherein, in any one of Aspects 11 to 17, the method further comprises the step of transmitting a configuration or activation for unauthorized transmission to be used for location reporting to a UE or at least one other UE.

[0166] Aspect 19: A wireless communication method performed by a node, wherein, in any one of Aspects 11 to 18, the method further comprises the step of obtaining location information for a UE or at least one of at least one other UE from a location management entity.

[0167] Aspect 20: A wireless communication method performed by a node, wherein, in any one of Aspects 11 to 19, the method further comprises the step of verifying a location reported by a UE or at least one of at least one other UE using location information from a location management entity.

[0168] Aspect 21: A wireless communication method performed by a node, wherein, in any one of Aspects 11 to 20, the method further comprises the step of determining the location of at least one of a UE or at least one other UE using location information from a location management entity and a reported location.

[0169] Aspect 22: A wireless communication method performed by a node in any one of Aspects 11 to 21, wherein the node is a base station or a roadside unit.

[0170] Aspect 23: A wireless communication method performed by a user device (UE), comprising: receiving from a node information representing a security key for sidelink connectionless groupcast communication performed between UEs without a wireless resource control connection; and receiving from another UE communication for a sidelink connectionless groupcast using the security key.

[0171] Aspect 24: A wireless communication method performed by a UE in Aspect 23, wherein information is received when the UE is within the distance of the other UE indicated by the other UE.

[0172] Aspect 25: A wireless communication method performed by a UE, wherein the information is a security key in Aspect 23 or Aspect 24.

[0173] Aspect 26: A wireless communication method performed by a UE, wherein, in Aspect 23 or Aspect 24, the information is a parameter used to derive a security key.

[0174] Aspect 27: A wireless communication method performed by a UE, wherein, in any one of Aspects 23 to 26, the method further comprises the step of transmitting a report of the UE's location to a node.

[0175] Aspect 28: In Aspect 27, a wireless communication method performed by the UE, in which the report is in a message regarding a random access procedure.

[0176] Aspect 29: A wireless communication method performed by a UE, wherein the report in Aspect 27 is transmitted as a resource for unauthorized transmission.

[0177] Aspect 30: A wireless communication method performed by a UE, wherein, in any one of Aspects 23 to 29, the method further comprises the step of receiving from a node a configuration indicating that a message of a random access procedure will be used for location reporting.

[0178] Aspect 31: A wireless communication method performed by a UE, wherein, in any one of Aspects 23 to 30, the method further comprises the step of receiving from a node a configuration or activation for unauthorized transmission to be used for location reporting.

[0179] Aspect 32: A wireless communication method performed by a UE, wherein, in any one of Aspects 23 to 31, the node is a base station or a roadside unit.

[0180] Aspect 33: A device for wireless communication in a device, comprising: a processor; a memory coupled with the processor; and instructions stored in the memory and executable by the processor to enable the device to perform one or more methods of Aspects 1 to 10.

[0181] Aspect 34: A device for wireless communication comprising a memory and one or more processors coupled to the memory, wherein the one or more processors are configured to perform one or more methods of Aspects 1 to 10.

[0182] Aspect 35: A device for wireless communication comprising at least one means for performing one or more methods of Aspects 1 to 10.

[0183] Aspect 36: A non-transient computer-readable medium for storing a code for wireless communication, wherein the code comprises instructions executable by a processor to perform one or more methods of Aspects 1 to 10.

[0184] Aspect 37: A non-transient computer-readable medium storing a set of instructions for wireless communication, wherein the set of instructions comprises one or more instructions that, when executed by one or more processors of the device, cause the device to perform one or more methods of Aspects 1 to 10.

[0185] Aspect 38: A device for wireless communication in a device, comprising: a processor; a memory coupled with the processor; and instructions stored in the memory and executable by the processor to enable the device to perform one or more methods of Aspects 11 to 22.

[0186] Aspect 39: A device for wireless communication comprising a memory and one or more processors coupled to the memory, wherein the one or more processors are configured to perform one or more methods of Aspects 11 to 22.

[0187] Aspect 40: A device for wireless communication comprising at least one means for performing one or more methods of Aspects 11 to 22.

[0188] Aspect 41: A non-transient computer-readable medium for storing a code for wireless communication, wherein the code comprises instructions executable by a processor to perform one or more methods of Aspects 11 to 22.

[0189] Aspect 42: A non-transient computer-readable medium storing a set of instructions for wireless communication, wherein the set of instructions comprises one or more instructions that, when executed by one or more processors of the device, cause the device to perform one or more methods of Aspects 11 to 22.

[0190] Aspect 43: A device for wireless communication in a device, comprising: a processor; a memory coupled with the processor; and instructions stored in the memory and executable by the processor to enable the device to perform one or more methods of Aspects 23 to 32.

[0191] Aspect 44: A device for wireless communication comprising a memory and one or more processors coupled to the memory, wherein the one or more processors are configured to perform one or more methods of Aspects 23 to 32.

[0192] Aspect 45: An apparatus for wireless communication comprising at least one means for performing one or more methods of Aspects 23 to 32.

[0193] Aspect 46: A non-transient computer-readable medium for storing a code for wireless communication, wherein the code comprises instructions executable by a processor to perform one or more of the methods of Aspects 23 to 32.

[0194] Aspect 47: A non-transient computer-readable medium storing a set of instructions for wireless communication, wherein the set of instructions comprises one or more instructions that, when executed by one or more processors of the device, cause the device to perform one or more methods of Aspects 23 to 32.

[0195] The foregoing disclosure is for illustrative purposes only and is not intended to limit or encompass the embodiments to the exact form disclosed. Modifications and changes may be made in consideration of the foregoing disclosure or obtained from the practice of the embodiments.

[0196] As used herein, the term “component” is intended to be broadly interpreted as hardware and / or a combination of hardware and software. “Software” is broadly interpreted to mean functions referred to, among other examples, as instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, and / or software, firmware, middleware, microcode, hardware description languages, etc. As used herein, “processor” is implemented in hardware and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein may be implemented in various forms of hardware and / or combinations of hardware and software. The actual special control hardware or software code used to implement such systems and / or methods does not limit the modes. Accordingly, the operation and behavior of the systems and / or methods are described herein without reference to specific software code, as those skilled in the art will understand that software and hardware may be designed to implement the systems and / or methods based at least partially on the description herein.

[0197] As used herein, "satisfying the threshold" may, depending on the context, mean a value greater than the threshold, a value greater than or equal to the threshold, a value less than the threshold, a value less than or equal to the threshold, a value equal to the threshold, a value not equal to the threshold, etc.

[0198] Even if specific combinations of features are cited in the claims and / or disclosed in the specification, such combinations are not intended to limit the disclosure of various embodiments. Many of these features may be combined in ways not specifically mentioned in the claims and / or disclosed in the specification. The disclosure of various embodiments includes each dependent claim combined with all other claims in the set of claims. The phrase "at least one" in the list of items used herein refers to all combinations of said item, including a single member. For example, "at least one of a, b, or c" is intended to cover a, b, c, a + b, a + c, b + c, and a + b + c, as well as any combination with multiples of the same element (e.g., a + a, a + a + a, a + a + b, a + a + c, a + b + b, a + c + c, b + b, b + b + b, b + b + c, c + c, and c + c + c, or any other ordering of a, b, and c).

[0199] Any element, act, or indication used herein shall not be interpreted as important or essential unless expressly explained otherwise. Furthermore, as used herein, the articles (“a” and “an”) are intended to include one or more items and may be used interchangeably with “one or more.” Also, as used herein, the definite article “the” is intended to include one or more items mentioned in relation to the definite article “the” and may be used interchangeably with “one or more.” Also, as used herein, the terms “set” and “group” are intended to include one or more items and may be used interchangeably with “one or more.” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, terms such as “have,” “have,” and “having” are intended as open terms that do not limit the elements they modify (e.g., an element “having” A may also have B). Additionally, the phrase “based on” is intended to mean “based at least partially on” unless otherwise explicitly indicated. Furthermore, as used herein, the term “or” is intended to be inclusive when used consecutively and may be used interchangeably with “and / or” unless otherwise explicitly stated (e.g., when used in combination with “either one” or “only one of”).

Claims

Claim 1 A wireless communication method performed by a user device (UE), comprising the steps of: transmitting (610) a request to a node for a security key for sidelink connectionless groupcast communication performed without a wireless resource control connection between UEs — said request indicates a distance from said UE to use said security key —; and receiving (620) information indicating said security key from said node. Claim 2 A wireless communication method according to claim 1, further comprising the step of transmitting communication for a sidelink non-connected group cast using the security key. Claim 3 A wireless communication method according to claim 1, wherein the information is the security key or the information is a parameter used to derive the security key. Claim 4 A wireless communication method according to claim 1, further comprising the step of transmitting a report indicating the location of the UE to the node. Claim 5 A wireless communication method according to paragraph 4, wherein the report is in a message for a random access procedure or the report is transmitted from a resource for unauthorized transmission. Claim 6 A wireless communication method according to claim 1, wherein the method further comprises the step of receiving from the node a configuration indicating that a message of a random access procedure will be used for location reporting, or the method further comprises the step of receiving from the node a configuration or activation for unauthorized transmission to be used for location reporting. Claim 7 A wireless communication method performed by a node, comprising the steps of: receiving (710) a request from a UE for a security key for sidelink connectionless groupcast communication performed without a wireless resource control connection between user equipment (UEs) — said request indicates a distance from said UE for using said security key —; and transmitting (720) information indicating said security key to said UE and to at least one other UE within said distance of said UE. Claim 8 A wireless communication method according to claim 7, wherein the information is the security key or the information is a parameter used to derive the security key. Claim 9 A wireless communication method according to claim 7, further comprising: receiving a first report indicating the location of the UE from the UE; and receiving a second report indicating the location of at least one other UE from the at least one other UE. Claim 10 A wireless communication method according to claim 9, wherein at least one of the first report or the second report is in a message of a random access procedure, or at least one of the first report or the second report is received from a resource for unauthorized transmission. Claim 11 A wireless communication method according to claim 7, wherein the method further comprises the step of transmitting a configuration indicating that a message of a random access procedure will be used for location reporting to the UE or to the at least one other UE, or the method further comprises the step of transmitting a configuration or activation for unauthorized transmission to be used for location reporting to the UE or to the at least one other UE, or the method further comprises the step of verifying a location reported by at least one of the UE or the at least one other UE using location information from a location management entity, or the method further comprises the step of determining the location of at least one of the UE or the at least one other UE using location information from a location management entity and the reported location. Claim 12 A wireless communication method performed by a user device (UE), comprising the steps of: receiving (810) from a node information representing a security key for a sidelink non-connected groupcast communication performed between UEs without a wireless resource control connection—the information is received when the UE is within the distance of the other UE indicated by the other UE—; and receiving (820) communication for a sidelink non-connected groupcast from the other UE using the security key. Claim 13 A wireless communication method according to claim 12, wherein the information is the security key, or the information is a parameter used to derive the security key, or the method further comprises the step of transmitting a report of the location of the UE to the node, or the method further comprises the step of receiving from the node a configuration indicating that a message of a random access procedure will be used for the location report, or the method further comprises the step of receiving from the node a configuration or activation for unauthorized transmission to be used for the location report. Claim 14 A device for wireless communication in a user device (UE), comprising: a memory; and one or more processors coupled to the memory, wherein the one or more processors are configured to: transmit to a node a request for a security key for sidelink connectionless groupcast communication performed between UEs without a wireless resource control connection — the request indicates a distance from the UE for using the security key —; and receive information representing the security key from the node. Claim 15 In paragraph 14, the information is the security key, or the information is a parameter used to derive the security key, or the one or more processors are additionally configured to transmit a report indicating the location of the UE to the node, a device for wireless communication. Claim 16 delete Claim 17 delete Claim 18 delete Claim 19 delete Claim 20 delete Claim 21 delete Claim 22 delete Claim 23 delete Claim 24 delete Claim 25 delete Claim 26 delete Claim 27 delete Claim 28 delete Claim 29 delete Claim 30 delete

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