Radio Resource Management (RRM) Technology in Sidelink Wireless Communications

Abstract

Certain aspects described herein relate to receiving and / or forwarding radio resource management (RRM) configurations for sidelink reporting, and measuring sidelink signals and generating measurement reports for reporting to a network.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to Patent Cooperation Treaty (PCT) patent application No. PCT / CN2019 / 129752, entitled “TECHNIQUES FOR RADIORESOURCE MANAGEMENT (RRM) IN SIDELINK WIRELESS COMMUNICATIONS,” filed on December 30, 2019, which is assigned to the assignee of this application and is hereby expressly incorporated by reference for all purposes. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communication systems, and more particularly to radio resource management (RRM) in wireless communications. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, etc. These systems may be multiple-access systems capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single-carrier frequency division multiple access (SC-FDMA) systems.

[0005] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that supports different wireless devices to communicate at the municipal, national, regional, and even global levels. For example, the fifth generation (5G) wireless communication technology, which may be referred to as 5G New Radio (5GNR) is envisioned to expand and support a variety of usage scenarios and applications relative to current mobile network generations. In one aspect, 5G communication technology may include: enhanced mobile broadband, addressing the use case of people-centric access to multimedia content, services, and data; ultra-reliable low-latency communication (URLLC) with specific specifications for latency and reliability; and high-capacity machine-type communication, which may allow a large number of connected devices and the transmission of relatively small amounts of non-latency sensitive information. However, as the demand for mobile broadband access continues to increase, further improvements to 5G communication technology and subsequent technologies may be needed.

[0006] In some wireless communication technologies, such as 5G, a user equipment (UE) communicates via one or more of a plurality of interfaces. The plurality of interfaces may include a Uu interface between the UE and a base station, wherein the UE may receive communications from the base station via a downlink and send communications to the base station via an uplink. In addition, the plurality of interfaces may include a sidelink interface for communicating directly with one or more other UEs via a sidelink channel (e.g., without passing through the base station). Summary of the Invention

[0007] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of these aspects. This summary is not an extensive overview of all contemplated aspects and is neither intended to identify key or essential elements of all aspects nor to delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

[0008] According to an example, a wireless communication method is provided. The method includes: receiving, by a first device, a radio resource measurement (RRM) configuration for measuring and reporting signals received from one or more devices in a sidelink resource; measuring the signals received from the one or more devices based on the RRM configuration; and sending a report of one or more signal parameters of the measured signals to a base station based on the RRM configuration.

[0009] In another example, a method for wireless communication is provided, comprising: receiving, by a first device from a base station, an RRM configuration for measuring and reporting signals received from one or more devices in a sidelink resource; and sending, by the first device, the RRM configuration to a second device via a sidelink channel.

[0010] In another example, a method for wireless communication is provided, comprising sending an RRM configuration for measuring and reporting signals received from one or more devices in a sidelink resource, and receiving from the device a report of one or more signal parameters of the signals from the one or more devices measured by the device based on the RRM configuration.

[0011] In another example, an apparatus for wireless communication is provided, comprising: a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to execute instructions to perform the operations of the methods and examples described above and further herein. In another aspect, an apparatus for wireless communication is provided, comprising means for performing the operations of the methods and examples described above and further herein. In yet another aspect, a computer-readable medium is provided, comprising code executable by one or more processors to perform the operations of the methods and examples described above and further herein.

[0012] In one example, an apparatus for wireless communication is provided, comprising: a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to receive a radio resource measurement (RRM) configuration for measuring and reporting signals received from one or more devices in sidelink resources, measure the signals received from the one or more devices based on the RRM configuration, and send a report of one or more signal parameters of the measured signals to a base station based on the RRM configuration.

[0013] In another example, an apparatus for wireless communication is provided, comprising: a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to receive a radio resource measurement (RRM) configuration from a base station for measuring and reporting signals received from one or more devices in a sidelink resource; and to send the RRM configuration to a second device via a sidelink channel.

[0014] To accomplish the foregoing and related ends, one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of one or more aspects. However, these features are indicative of but a few of the various ways in which the principles of the various aspects may be employed, and this description is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The disclosed aspects will be described below in conjunction with the accompanying drawings, which are provided to illustrate and not to limit the disclosed aspects, wherein like reference numerals represent like elements, and wherein:

[0016] Figure 1 An example of a wireless communication system according to various aspects of the present disclosure is shown;

[0017] Figure 2 is a block diagram illustrating an example of a UE according to various aspects of the present disclosure;

[0018] Figure 3 is a block diagram illustrating an example of a base station according to various aspects of the present disclosure;

[0019] Figure 4 is a flow chart illustrating an example of a method for measuring and reporting signals from a device over a sidelink in accordance with various aspects of the present disclosure;

[0020] Figure 5 is a flow chart illustrating an example of a method for forwarding configuration of measurements and reports of signals from a device on a sidelink in accordance with various aspects of the present disclosure;

[0021] Figure 6 is a flow chart illustrating an example of a method for receiving a measurement report of a signal from a device over a sidelink according to various aspects of the present disclosure;

[0022] Figure 7 A system for configuring radio resource management (RRM) measurements on sidelink resources according to various aspects of the present disclosure is shown;

[0023] Figure 8 A system for performing RRM measurements on sidelink resources according to various aspects of the present disclosure is shown; and

[0024] Figure 9 is a block diagram illustrating an example of a MIMO communication system including a base station and UEs according to various aspects of the present disclosure. DETAILED DESCRIPTION

[0025] Various aspects will now be described with reference to the accompanying drawings. In the following description, for the purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more aspects. However, it is apparent that these aspects can be practiced without these specific details.

[0026] The described features generally relate to providing radio resource management (RRM) procedures for sidelink communications. For example, sidelink communications can refer to device-to-device (D2D) communications between devices (e.g., user equipment (UE)) in a wireless network. In a specific example, sidelink communications can be defined for vehicle-based communications, such as vehicle-to-vehicle (V2V) communications, vehicle-to-infrastructure (V2I) communications (e.g., from a vehicle-based communication device to a road infrastructure node), vehicle-to-network (V2N) communications (e.g., from a vehicle-based communication device to one or more network nodes, such as a base station), combinations thereof, and / or combinations with other devices, which can be collectively referred to as vehicle-to-everything (V2X) communications. In V2X communications, vehicle-based communication devices can communicate with each other and / or with infrastructure devices via sidelink channels. Fifth generation (5G) New Radio (NR) communication technology and Long Term Evolution (LTE) provide continued support and implementation for V2X communications. Although various aspects are generally described herein in terms of D2D / V2X communications, these concepts and techniques can be similarly and more generally applied to substantially any type of wireless communications.

[0027] RRM is not specified in some D2D wireless technologies, such as ProSe and LTE V2X defined in 3GPP Release 12 and / or 13, because RRM may not be needed in these technologies because there is no handover from one peer UE to another. For example, for a UE in idle mode (e.g., radio resource control (RRC)_IDLE or RRC_INACTIVE), the UE uses RRM measurement results to perform cell reselection between cells of one or more base stations. For a UE in connected mode (e.g., RRC_CONNECTED), RRM may include UE measurement configuration and measurement reports to enable network-controlled mobility via or between cells of one or more base stations. In addition, only broadcast may be supported in ProSe and LTE V2X, and RRM may not be applicable to broadcast links.

[0028] In some wireless communication technologies, such as 5G NR, sidelink signal measurements (e.g., sidelink reference signal received power (SL-RSRP)) are reported for unicast for power control. In this example, for a unicast receiver UE, the SL-RSRP is reported to the transmitter UE and used for sidelink open-loop power control of the unicast of the transmitter UE, and the transmitter UE derives the path loss estimate. RRM can also be used for bearer management (e.g., PC5 service quality indicator (PQI) maintenance, where PC5 can be an interface defined between V2X devices), beam management, bandwidth part (BWP) management, etc.

[0029] In an example, in NR, a sidelink radio bearer (SLRB) can be configured to the UE by the network (NW) (e.g., via a gNB or other base station) via RRC, a system information block (SIB), or pre-configured. A UE in RRC_CONNECTED mode can report QoS information for a PC5 QoS flow to the gNB / ng-eNB (e.g., via RRC dedicated signaling), and the gNB / ng-eNB can provide SLRB configuration and configure the mapping of PC5 QoS flows to SLRBs based on the UE-reported QoS information (e.g., via RRC dedicated signaling). For UEs in RRC_IDLE / RRC_INACTIVE mode, the gNB / ng-eNB can provide SLRB configuration and configure the PC5 QoS profile to SLRB mapping via a V2X-specific SIB. When the gNB / ng-eNB initiates transmission of a new PC5 QoS flow, the SLRB associated with the PC5 QoS profile of the flow can be established based on the SIB configuration. For out-of-coverage (OoC) UEs, the SLRB configuration and the mapping of PC5 QoS profiles to SLRBs may be pre-configured (e.g., defined in a configuration stored in the UE). When the gNB / ng-eNB initiates the transmission of a new PC5 QoS flow, the OoC UE may establish the SLRB associated with the flow based on the pre-configuration.

[0030] For example, in LTE V2X, a Mode 3 UE may only operate in RRC connected mode. In this example, the eNB (or other base station) may configure the UE to report complete UE geographic location information based on periodic reporting via existing RRC measurement report signaling. For example, the eNB may configure the UE to report the channel busy rate (CBR) on RRC signaling. A Mode 4 UE may also operate in RRC idle or OoC mode. When entering RRC connected mode, the UE may send CBR measurement reports and location information to the eNB. The RRM framework defined in LTE may be reused. For example, both the CBR and location reports for Mode 3 / 4 are sent in the LTEMeasurementReport message. In the example, periodic reporting and V1 / V2 event triggered reporting may be supported (e.g., V1 indicates a CBR above a threshold and V2 indicates a CBR below a threshold).

[0031] Although inter-UE handover may not be introduced in the NR sidelink, RRM for the NR sidelink is still useful. For example, RRM for the NR sidelink can facilitate SLRB reconfiguration, especially for unicast links (e.g., the NW can reconfigure the PQI of the SLRB). RRM for the NR sidelink can also facilitate resource pool optimization (e.g., the NW can reconfigure the resource pool allocation), carrier aggregation (CA) management (e.g., the NW can reconfigure the component carrier (CC) list for the NR sidelink), BWP management (e.g., the NW can reconfigure the BWP set for the NR sidelink), assist the NW in NW-controlled path selection between the Uu and sidelink (SL) interfaces (e.g., control can be done by the radio access network (RAN) or the core network or another network entity (in the case of the Industrial Internet of Things (IIOT))), resource reselection (e.g., for Mode 4 and unicast links, where the transmitter UE can reselect resources based on RRM reports from the receiver UE), etc. For example, the Uu interface may include an interface between the UE and the gNB, and the sidelink interface may include an interface between the UEs.

[0032] Various aspects described herein relate to performing RRM procedures for sidelink communications. In an example, the RRM procedures may also depend on a resource allocation mode used to allocate resources for communication over a sidelink channel. In a specific example, there may be different resource allocation modes for sidelink communications, including resource allocation mode 1, in which an access point (e.g., a gNB) schedules (via a sidelink grant to a transmitter UE) sidelink resources for the transmitter UE to transmit sidelink communications to a receiver UE, and resource allocation mode 2, in which the transmitter UE may schedule specific resources, which may be received from the access point in a resource pool, for transmitting sidelink communications to the receiver UE. Resource allocation modes 1 and 2 may be defined in 5G NR wireless communication technology.

[0033] For UEs in connected mode in resource allocation mode 1, in one example, the network may send an RRM configuration to the transmitter UE (e.g., via the gNB) for transmission to the receiver UE over a sidelink channel, and the transmitter UE may store the configuration and forward it to the receiver UE. In another example, the network may send the RRM configuration directly to the receiver UE and / or may broadcast the RRM configuration to multiple UEs. In either case, the receiver UE may perform sidelink measurements (e.g., measurements of the transmitter UE) and may send measurement reports to the network. The network may perform additional functions based on the received measurement reports, such as reconfiguring the PQI of the SLRB, releasing the SLRB, radio access technology (RAT) / interface reselection, Uu or SL path reselection, etc.

[0034] The features described below will be referred to Figure 1-9Presented in more detail.

[0035] As used in this application, the terms "component," "module," "system," and the like are intended to include computer-related entities such as, but not limited to, hardware, software, a combination of hardware and software, or software being executed. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or a computer. By way of illustration, both an application running on a computing device and a computing device can be a component. One or more components can reside within a process and / or execution thread, and a component can be located on a single computer and / or distributed between two or more computers. In addition, these components can be executed from various computer-readable media having various data structures stored thereon. Components can communicate via local and / or remote processes, for example, based on signals having one or more data packets, such as data from a component interacting with a local system, another component in a distributed system, and / or data from a component interacting with other systems via signals across a network (e.g., the Internet). Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like, whether referring to software, firmware, middleware, microcode, hardware description language, or otherwise.

[0036] The technology described herein can be used in various wireless communication systems, such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and other systems. The terms "system" and "network" are generally used interchangeably. A CDMA system can implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and the like. CDMA2000 covers the IS-2000, IS-95, and IS-856 standards. IS-2000 versions 0 and A are commonly referred to as CDMA2000 1X, 1X, and the like. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD), and the like. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. A TDMA system can implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA systems can implement technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM TMUTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) and Advanced LTE (LTE-A) are new versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization called the "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein can be used for the above systems and wireless technologies as well as other systems and wireless technologies, including cellular (e.g., LTE) communications on shared radio frequency spectrum bands. However, the following description describes an LTE / LTE-A system for example purposes, and LTE terminology is used in most of the description below, but the techniques are applicable beyond LTE / LTE-A applications (e.g., to fifth generation (5G) new radio (NR) networks or other next generation communication systems).

[0037] The following description provides examples and does not limit the scope, applicability or examples set forth in the claims. Without departing from the scope of this disclosure, the functions and arrangements of the elements discussed may be changed. Various examples may omit, replace or add various programs or components as appropriate. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted or combined. In addition, features described with respect to some examples may be combined in other examples.

[0038] Various aspects or features will be presented in terms of systems that may include a number of devices, components, modules, etc. It should be understood and appreciated that the various systems may include additional devices, components, modules, etc. and / or may not include all of the devices, components, modules, etc. discussed in connection with the figures. Combinations of these methods may also be used.

[0039] Figure 11 is a diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) may include a base station 102, a UE 104, an Evolved Packet Core (EPC) 160, and / or a 5G Core (5GC) 190. The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). A macro cell may include a base station. A small cell may include a femto cell, a pico cell, and a micro cell. In an example, the base station 102 may also include a gNB 180, as further described herein. In one example, some nodes of the wireless communication system may have a modem 240 and a communication component 242 for receiving and / or forwarding RRM configurations, performing sidelink RRM measurements, etc. Additionally, some nodes may have a modem 340 and a configuration component 342 for configuring the UE to perform sidelink RRM measurements, as described herein. Although UEs 104-a and 104-b are shown as having a modem 240 and a communication component 242, and base station 102 is shown as having a modem 340 and a configuration component 342, this is an illustrative example, and substantially any node or type of node may include a modem 240 and a communication component 242 and / or a modem 340 and a configuration component 342 to provide the corresponding functionality described herein.

[0040] A base station 102 configured for 4G LTE (which may be collectively referred to as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC 160 via a backhaul link 132 (e.g., using an S1 interface). A base station 102 configured for 5G NR (which may be collectively referred to as the Next Generation RAN (NG-RAN)) may interface with the 5GC 190 via a backhaul link 184. Among other functions, the base station 102 may perform one or more of the following: user data transmission, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and device tracking, RAN information management (RIM), paging, positioning, and delivery of warning information. Base stations 102 may communicate with each other directly or indirectly (e.g., through EPC 160 or 5GC 190) via backhaul links 134 (e.g., using an X2 interface). Backhaul links 134 may be wired or wireless.

[0041] Base station 102 can communicate wirelessly with one or more UEs 104. Each of base stations 102 can provide communication coverage for a corresponding geographic coverage area 110. There can be overlapping geographic coverage areas 110. For example, a small cell 102′ can have a coverage area 110′ that overlaps with the coverage area 110 of one or more macro base stations 102. A network including small cells and macro cells can be referred to as a heterogeneous network. A heterogeneous network can also include a Home evolved Node B (eNB) (HeNB), which can provide service to a restricted group, which can be referred to as a Closed Subscriber Group (CSG). The communication link 120 between base station 102 and UE 104 can include uplink (UL) (also known as reverse link) transmissions from UE 104 to base station 102 and / or downlink (DL) (also known as forward link) transmissions from base station 102 to UE 104. The communication link 120 can use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link can be over one or more carriers. The base station 102 / UE 104 can transmit in the DL and / or UL directions using spectrum with up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) of bandwidth per carrier allocated in a carrier aggregation totaling up to Yx MHz (e.g., for x component carriers). The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric for DL ​​and UL (e.g., more or fewer carriers may be allocated for DL ​​than for UL). The component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell), and the secondary component carrier may be referred to as a secondary cell (SCell).

[0042] In another example, certain UEs (e.g., UEs 104-a and 104-b) may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use the DL / UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication may be carried out over various wireless D2D communication systems, such as FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0043] The wireless communication system may also include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 in the 5 GHz unlicensed spectrum via a communication link 154. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) prior to communication to determine whether the channel is available.

[0044] The small cell 102' can operate in licensed and / or unlicensed spectrum. When operating in the unlicensed spectrum, the small cell 102' can employ NR and use the same 5 GHz unlicensed spectrum used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum can expand coverage and / or increase capacity of the access network.

[0045] Base station 102 (whether a small cell 102' or a large cell (e.g., a macro base station)) may include an eNB, a gNodeB (gNB), or other type of base station. Some base stations, such as gNB 180, may operate in the traditional sub-6 GHz spectrum, millimeter wave (mmW) frequencies, and / or near-mmW frequencies for communicating with UE 104. When gNB 180 operates in mmW or near-mmW frequencies, gNB 180 may be referred to as a mmW base station. Extremely high frequency (EHF) is a portion of the RF portion of the electromagnetic spectrum. EHF ranges from 30 GHz to 300 GHz, with wavelengths between 1 mm and 10 mm. Radio waves in this band may be referred to as millimeter waves. Near-mmW may extend down to 3 GHz frequencies with a wavelength of 100 mm. Super high frequency (SHF) bands extend between 3 GHz and 30 GHz and are also referred to as centimeter waves. Communications using the mmW / near-mmW radio frequency bands have extremely high path loss and short range. The mmW base station 180 can utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short distance. The base station 102 mentioned herein can include a gNB 180.

[0046] EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. MME 162 may communicate with a Home Subscriber Server (HSS) 174. MME 162 is a control node that handles signaling between UE 104 and EPC 160. Generally, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through Serving Gateway 166, which itself is connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation and other functions. PDN Gateway 172 and BM-SC 170 are connected to IP Services 176. IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), PS streaming services, and / or other IP services. The BM-SC 170 may provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 may serve as the entry point for content providers' MBMS delivery, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS delivery. The MBMS gateway 168 may be used to distribute MBMS services to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts specific services, and may be responsible for session management (start / stop) and collecting charging information related to eMBMS.

[0047] 5GC 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. AMF 192 may communicate with unified data management (UDM) 196. AMF 192 may be a control node that handles signaling between UE 104 and 5GC 190. Typically, AMF 192 may provide QoS flow and session management. User Internet Protocol (IP) packets (e.g., from one or more UEs 104) may be transmitted through UPF 195. UPF 195 may provide UE IP address allocation for one or more UEs, as well as other functions. UPF 195 is connected to IP services 197. IP services 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), PS streaming services, and / or other IP services.

[0048] A base station may also be referred to as a gNB, a Node B, an evolved Node B (eNB), an access point, a base transceiver station, a wireless base station, a wireless transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmit reception point (TRP), or some other suitable terminology. Base station 102 provides an access point to EPC 160 or 5GC 190 for UE 104. Examples of UE 104 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptop computers, personal digital assistants (PDAs), satellite radios, positioning systems (e.g., satellite, terrestrial), multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet computers, smart devices, robots, drones, industrial / manufacturing equipment, wearable devices (e.g., smart watches, smart clothing, smart glasses, virtual reality goggles, smart wristbands, smart jewelry (e.g., smart rings, smart bracelets)), vehicle / onboard equipment, meters (e.g., parking meters, electricity meters, gas meters, water meters, flow meters), gas pumps, large or small kitchen appliances, medical / healthcare equipment, implants, sensors / actuators, displays, or any other similarly functional device. Some of UE 104 may be referred to as IoT devices (e.g., meters, pumps, monitors, cameras, industrial / manufacturing equipment, appliances, vehicles, robots, drones, etc.). IoT UEs may include machine type communication (MTC) / enhanced MTC (eMTC, also known as Category (CAT)-M, Cat M1) UEs, NB-IoT (also known as CAT NB1) UEs, and other types of UEs. In the present disclosure, eMTC and NB-IoT may refer to future technologies that may evolve from or based on these technologies. For example, eMTC may include FeMTC (further eMTC), eFeMTC (enhanced further eMTC), mMTC (massive MTC), etc., while NB-IoT may include eNB-IoT (enhanced NB-IoT), FeNB-IoT (further enhanced NB-IoT), etc. UE 104 may also be referred to as a station, mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0049] In an example, the configuration component 342 can send an RRM configuration to one or more UEs 104, which can include one or more parameters related to performing RRM measurements via a sidelink. The communication component 242 of UE 104-a or 104-b (and / or other UEs) can receive the RRM configuration for performing RRM measurements and / or reporting the measurements via a sidelink. In one example, the communication component 242 of a transmitter UE (e.g., UE 104-a) can forward the RRM configuration and / or one or more parameters thereof to one or more receiver UEs (e.g., UE 104-b) via a sidelink channel (e.g., via communication link 158). In another example, a receiver UE (e.g., UE 104-b) can receive the RRM configuration from the base station 102. The receiver UE (e.g., UE 104-b) can perform RRM measurements on signals received from the transmitter UE via sidelink resources and can report the RRM measurements to the base station 102 based on the RRM configuration.

[0050] Now go to Figure 2-9 , various aspects are described with reference to one or more components and one or more methods that can perform the actions or operations described herein, where aspects in dashed lines are optional. Figure 4-6 The operations described in the foregoing are presented in a particular order and / or performed by exemplary components, but it should be understood that the order of actions and the components performing the actions may vary depending on the implementation. Furthermore, it should be understood that the following actions, functions, and / or described components may be performed by a specially programmed processor, a processor executing specially programmed software or computer-readable media, or any other combination of hardware components and / or software components capable of performing the described actions or functions.

[0051] refer to Figure 2 , one example of an implementation of the UE 104 may include various components, some of which have been described above and further described herein, including components such as one or more processors 212 and memory 216 communicating via one or more buses 244 and a transceiver 202, which may operate in conjunction with a modem 240 and / or a communication component 242 for receiving and / or forwarding RRM configurations, performing sidelink RRM measurements, etc., as described herein.

[0052] In one aspect, the one or more processors 212 may include the modem 240 and / or may be part of the modem 240 using one or more modem processors. Thus, various functions associated with the communication component 242 may be contained within the modem 240 and / or the processor 212 and, in one aspect, may be performed by a single processor, while in other aspects, different functions may be performed by two or more different processors. For example, in one aspect, the one or more processors 212 may include a modem processor, a baseband processor, a digital signal processor, a transmit processor, a receiver processor, or any one or any combination of a transceiver processor associated with the transceiver 202. In other aspects, some features of the one or more processors 212 and / or the modem 240 associated with the communication component 242 may be performed by the transceiver 202.

[0053] In addition, the memory 216 can be configured to store local versions of data and / or applications 275 used herein or in the communication component 242 and / or one or more subcomponents executed by the at least one processor 212. The memory 216 can include any type of computer-readable medium usable by a computer or the at least one processor 212, such as random access memory (RAM), read-only memory (ROM), tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and any combination thereof. In one aspect, for example, the memory 216 can be a non-volatile computer-readable storage medium that stores one or more computer-executable codes defining the communication component 242 and / or one or more subcomponents thereof, and / or data associated therewith when the UE 104 is operating the at least one processor 212 to execute the communication component 242 and / or one or more subcomponents thereof.

[0054] The transceiver 202 may include at least one receiver 206 and at least one transmitter 208. The receiver 206 may include hardware and / or software executable by a processor to receive data, the code including instructions and stored in memory (e.g., a computer-readable medium). The receiver 206 may be, for example, a radio frequency (RF) receiver. In one aspect, the receiver 206 may receive signals transmitted by at least one base station 102. In addition, the receiver 206 may process these received signals and may also obtain signal measurements, such as, but not limited to, Ec / Io signal-to-noise ratio (SNR), reference signal received power (RSRP), received signal strength indicator (RSSI), etc. The transmitter 208 may include hardware and / or software executable by a processor to transmit data, the code including instructions and stored in memory (e.g., a computer-readable medium). Suitable examples of the transmitter 208 may include, but are not limited to, an RF transmitter.

[0055] In addition, in an aspect, the UE 104 can include an RF front end 288 that can communicate with the one or more antennas 265 and the transceiver 202 to receive and transmit wireless transmissions, such as wireless communications transmitted by at least one base station 102 or wireless transmissions transmitted by the UE 104. The RF front end 288 can be connected to the one or more antennas 265 and can include one or more low noise amplifiers (LNAs) 290, one or more switches 292, one or more power amplifiers (PAs) 298, and one or more filters 296 for transmitting and receiving RF signals.

[0056] In one aspect, the LNAs 290 can amplify received signals at a desired output level. In one aspect, each LNA 290 can have specified minimum and maximum gain values. In one aspect, the RF front end 288 can use one or more switches 292 to select a particular LNA 290 and its specified gain value based on the desired gain value for a particular application.

[0057] Furthermore, for example, the RF front end 288 can use one or more PAs 298 to amplify the signal for RF output at a desired output power level. In one aspect, each PA 298 can have a specified minimum and maximum gain value. In one aspect, the RF front end 288 can use one or more switches 292 to select a particular PA 298 and its specified gain value based on the desired gain value for a particular application.

[0058] In addition, for example, the RF front end 288 can use one or more filters 296 to filter the received signal to obtain an input RF signal. Similarly, in one aspect, for example, a corresponding filter 296 can be used to filter the output from the corresponding PA 298 to produce an output signal for transmission. In one aspect, each filter 296 can be connected to a specific LNA 290 and / or PA 298. In one aspect, based on the configuration specified by the transceiver 202 and / or the processor 212, the RF front end 288 can use one or more switches 292 to select a transmit path or a receive path using a specified filter 296, LNA 290, and / or PA 298.

[0059] Thus, the transceiver 202 can be configured to transmit and receive wireless signals via the RF front end 288 through one or more antennas 265. In one aspect, the transceiver can be tuned to operate at a specified frequency so that the UE 104 can communicate with, for example, one or more base stations 102 or one or more cells associated with one or more base stations 102. In one aspect, for example, the modem 240 can configure the transceiver 202 to operate at a specified frequency and power level based on the configuration of the UE 104 and the communication protocol used by the modem 240.

[0060] In one aspect, the modem 240 can be a multi-band, multi-mode modem that can process digital data and communicate with the transceiver 202, thereby using the transceiver 202 to send and receive digital data. In one aspect, the modem 240 can be multi-band and configured to support multiple frequency bands of a specific communication protocol. In one aspect, the modem 240 can be multi-mode and configured to support multiple operating networks and communication protocols. In one aspect, the modem 240 can control one or more components of the UE 104 (e.g., the RF front end 288, the transceiver 202) to enable the transmission and / or reception of signals from the network based on a specified modem configuration. In one aspect, the modem configuration can be based on the mode of the modem and the frequency band used. In another aspect, the modem configuration can be based on UE configuration information associated with the UE 104 provided by the network during cell selection and / or cell reselection.

[0061] In an aspect, the communication component 242 optionally includes a configuration processing component 252 for receiving an RRM configuration, forwarding an RRM configuration, etc., a measurement component 254 for measuring a signal on a side link based on the RRM configuration, and / or a measurement reporting component 256 for generating and / or sending a measurement report indicating one or more parameters of the measured signal, as described herein.

[0062] In one aspect, processor 212 may correspond to a processor that is coupled to Figure 9 Similarly, the memory 216 may correspond to the one or more processors described in conjunction with the UE. Figure 9 The memory described by the UE in .

[0063] refer to Figure 3 , one example of an implementation of a base station 102 (e.g., base station 102 and / or gNB 180 as described above) may include various components, some of which have been described above, but including components such as one or more processors 312 and memory 316 communicating via one or more buses 344 and a transceiver 302, which may operate in conjunction with a modem 340 and a configuration component 342 for configuring a UE to perform sidelink RRM measurements, as described herein.

[0064] The transceiver 302, receiver 306, transmitter 308, one or more processors 312, memory 316, applications 375, bus 344, RF front end 388, LNA 390, switch 392, filter 396, PA 398, and one or more antennas 365 may be the same as or similar to corresponding components of the UE 104 described above, but configured or otherwise programmed for base station operation as opposed to UE operation.

[0065] In an aspect, configuring component 342 optionally includes a report processing component 352 for receiving and / or processing measurement reports of RRM measurements performed by one or more UEs on the sidelink, as described herein.

[0066] In one aspect, processor 312 may correspond to a processor that is coupled to Figure 9 Similarly, the memory 316 may correspond to the one or more processors described in conjunction with Figure 9 The memory of the base station description in.

[0067] Figure 4 A flow chart illustrating an example of a method 400 for performing RRM measurements on a sidelink is shown. In an example, a UE (e.g., UE 104-b, acting as a receiver UE in a sidelink communication) may use Figure 1 and Figure 2 One or more components described in the method 400 are used to perform the functions described in the method 400.

[0068] In method 400, at block 402, an RRM configuration for measuring and reporting signals received from one or more devices in sidelink resources can be received. In one aspect, configuration processing component 252, for example, in conjunction with processor 212, memory 216, transceiver 202, communication component 242, etc., can receive an RRM configuration for measuring and reporting signals received from one or more devices in sidelink resources. For example, configuration processing component 252 can receive an RRM configuration from one or more devices (e.g., from base station 102, from other UE 104, etc.), as further described herein. The RRM configuration can include one or more parameters related to performing measurements of other UEs via a sidelink (e.g., via frequency resources associated with sidelink communications).

[0069] For example, the RRM configuration may include a periodic timer parameter for configuring periodic measurement reporting, such that the UE 104 may perform measurements each time the value of the periodic timer parameter expires (e.g., based on setting a periodic timer after performing a measurement or while performing a measurement, after sending a given measurement report, or when sending a given measurement report). Furthermore, for example, the RRM configuration may also include trigger conditions and / or event types for event-based reporting, wherein the UE 104 may detect the occurrence of the trigger conditions and / or events. For example, the UE 104 may detect a threshold-based trigger by comparing a measurement value to a threshold specified in the RRM configuration (e.g., measuring a signal strength or signal quality from a transmitter UE relative to a threshold and determining that the measured value is below the threshold). In some examples, the event type may correspond to measuring various thresholds, such as event types used in cell reselection. Furthermore, for example, the RRM configuration may also include layer 3 (L3) filter coefficients for measuring a cell or beam, thereby mitigating the effects of channel fading (e.g., making the measurement results more reliable, etc.). In addition, for example, the RRM configuration may specify the number of reports to be provided in the measurement report (e.g., whether to report RSRP, reference signal received quality (RSRQ), signal-to-noise ratio (SNR), CBR, etc.).

[0070] In one example, when receiving the RRM configuration at block 402, optionally at block 404, the RRM configuration may be received from a base station. In one aspect, the configuration processing component 252, for example, in conjunction with the processor 212, the memory 216, the transceiver 202, the communication component 242, etc., may receive the RRM configuration from a base station (e.g., the base station 102 or other network component). For example, the base station 102 may send the RRM configuration via the Uu interface using RRC signaling (e.g., in RRCReconfiguration via Uu RRC, the Uu RRC may include signaling radio bearer 1 (SRB1), SRB3, etc.), and the configuration processing component 252 may receive the RRM configuration via RRC signaling accordingly. In another example, the base station 102 may broadcast the RRM configuration for the sidelink in a SIB, and the configuration processing component 252 may receive the RRM configuration broadcast by the base station 102 in the SIB accordingly. When the UE is a receiver UE in a SL unicast connection, a measurement reporting procedure may be followed according to the RRM configuration.

[0071] In another example, upon receiving the RRM configuration at block 402, the RRM configuration may optionally be received from a transmitter device via a sidelink at block 406. In one aspect, the configuration processing component 252, for example, in conjunction with the processor 212, the memory 216, the transceiver 202, the communication component 242, etc., may receive the RRM configuration from the transmitter device via a sidelink. For example, the transmitter device (e.g., a different UE) may receive the RRM configuration, or at least a portion thereof, from the base station 102, as described above, and may then transmit the RRM configuration, or at least a portion thereof, to the UE 104 via a sidelink (e.g., using PC5 RRC), and the configuration processing component 252 may receive the RRM configuration from the transmitter device in response.

[0072] In method 400, at block 408, signals received from one or more other devices may be measured based on the RRM configuration. In one aspect, measurement component 254, for example, in conjunction with processor 212, memory 216, transceiver 202, communication component 242, etc., may measure signals received from one or more devices based on the RRM configuration. For example, measurement component 254 may detect one or more triggers for performing measurements, such as expiration of a periodic timer, one or more triggers or events, as described above (e.g., based on measuring a parameter relative to a threshold), etc. For example, based on determining to perform measurements, measurement component 254 may receive certain signals, such as one or more reference signals or other signals, from other devices (e.g., other UEs) via a sidelink. Measurement component 254 may accordingly perform measurements of signals from one or more other devices (which may also include a transmitter device that may transmit the RRM configuration to UE 104). Furthermore, in an example, measurement component 254 may apply L3 coefficients specified in the configuration to the measured values ​​to mitigate the effects of channel fading. In yet another example, measuring component 254 can perform measurements using a reporting quantity specified in an RRM configuration (eg, RSRP, RSRQ, SNR, CBR, etc.).

[0073] In method 400, at block 410, a report of one or more signal parameters of the measured signal can be sent to a base station. In one aspect, measurement reporting component 256, e.g., in conjunction with processor 212, memory 216, transceiver 202, communication component 242, etc., can send a report of one or more signal parameters of the measured signal to a base station (e.g., base station 102) and based on the RRM configuration. For example, at least for resource allocation mode 1, measurement reporting component 256 can send the report to base station 102 (e.g., the base station from which the RRM configuration may have been received) via a Uu interface. UE 104 (e.g., as a receiver UE) may not need to report measurements to a transmitter UE, as in resource allocation mode 1, base station 102 controls resource allocation. Furthermore, in an example, sending the report can be based on detecting one or more triggers or events described above. In any case, based on a detected trigger, expiration of a timer, etc., UE 104 (e.g., as a receiver UE) can report available measurements to the network via a measurement report message.

[0074] In any case, for example, measurement reporting component 256 may generate a report to include the values ​​measured at block 408 (e.g., the reporting quantity specified in the RRM configuration) and / or other parameters. For example, the other parameters may include an identifier of the transmitter UE associated with the measured values. In another example, the other parameters may include a measured quantity associated with the transmitter UE, such as available cell RSRP, RSRQ, SINR, CBR, or available beam RSRP, RSRQ, SINR, etc. In another example, the other parameters may include a CC index associated with the measured quantity (e.g., for CA management purposes, so that the network can reconfigure the CC set for the SL and / or the transmitter UE can activate or deactivate a CC). In another example, the other parameters may include a BWP ID associated with the measured quantity. Including the BWP ID in the measurement report may enable BWP management, such that the network can reconfigure / change / add the BWP set for the sidelink and / or the transmitter UE can switch BWPs via a medium access control (MAC)-control element (CE) or downlink control information (DCI), which may not be visible to the NW, etc.

[0075] Figure 5 A flow chart illustrating an example of a method 500 for forwarding RRM configuration. In an example, a UE (eg, UE 104-a, acting as a transmitter UE in a sidelink communication) may use Figure 1 and Figure 2 One or more components described in the method 400 are used to perform the functions described in the method 400.

[0076] In method 500, optionally at block 502, a resource configuration for a sidelink channel can be received from a base station. In one aspect, configuration processing component 252, for example, in conjunction with processor 212, memory 216, transceiver 202, communication component 242, etc., can receive a resource configuration for a sidelink channel from a base station (e.g., base station 102). In an example, configuration processing component 252 can receive a configuration or resource, such as via an SLRB configured by the network via RRC signaling. For example, in resource allocation mode 1, configuration processing component 252 can receive scheduled resources for transmitting a sidelink communication from UE 104 to another UE (e.g., a receiver UE), which can be based on a request for sidelink resources sent from UE 104 to base station 102. In resource allocation mode 1, the network can configure resources via RRC in this regard so that UE 104 can not make autonomous resource selections. In some examples, communication component 242 can accordingly transmit the sidelink communication to the receiver device via the scheduled resources.

[0077] In method 500, at block 504, an RRM configuration for measuring and reporting signals received from one or more devices in sidelink resources may be received. In one aspect, the configuration processing component 252, for example, in conjunction with the processor 212, the memory 216, the transceiver 202, the communication component 242, etc., may receive an RRM configuration for measuring signals received from one or more devices in sidelink resources. In an example, the configuration processing component 252 may receive the RRM configuration from a base station (e.g., the base station 102, in RRC signaling, broadcast signaling, or SIB, etc., as described above). For example, the configuration processing component 252 may receive the RRM configuration in an RRCReconfiguration via a Uu RRC (e.g., SRB1 or SRB3). As described, the RRM configuration may indicate parameters, instructions, etc. for measuring and reporting signals received from one or more devices in sidelink resources.

[0078] In method 500, at block 506, an RRM configuration can be sent to a receiver device via a sidelink. In one aspect, configuration processing component 252, for example, in conjunction with processor 212, memory 216, transceiver 202, communication component 242, etc., can send the RRM configuration to the receiver device via a sidelink. For example, configuration processing component 252 can send the RRM configuration (e.g., or at least a portion of parameters from the RRM configuration) to a receiver device (e.g., a receiver UE) via a sidelink (e.g., using PC5 RRC signaling). Additionally, for example, configuration processing component 252 can store the RRM configuration to allow UE 104 to also perform RRM measurements and reporting (e.g., as described above in connection with method 400). In any case, sending the RRM configuration to the receiver UE can enable the receiver UE to perform RRM measurements and reporting for the sidelink, and as described above, base station 102 can reconfigure parameters of the sidelink communications based on the RRM measurements and reporting (e.g., in resource allocation mode 1).

[0079] In method 500, optionally at block 508, an indication of reconfiguration or release of resources corresponding to a sidelink channel may be received from a base station. In one aspect, configuration processing component 252, e.g., in conjunction with processor 212, memory 216, transceiver 202, communication component 242, etc., may receive an indication of reconfiguration or release of resources corresponding to a sidelink channel from a base station. In one example, the base station may send an indication to UE 104 (e.g., as a transmitter UE) based on an RRM measurement report received on a sidelink from a receiver device to which UE 104 sends the RRM configuration. Thus, for example, base station 102 may determine to modify the sidelink channel or the corresponding resources configured to the transmitter UE based on the measurement report from the receiver UE, as further described herein. For example, the indication may indicate reconfiguration of a PQI of an SLRB, release of an SLRB, RAT / interface reselection, Uu / SL path reselection, etc.

[0080] In method 500, optionally at box 510, one or more parameters for communicating through the side link can be modified based on the indication. In one aspect, the configuration processing component 252, for example in combination with the processor 212, the memory 216, the transceiver 202, the communication component 242, etc. can modify one or more parameters for communicating through the side link channel based on the indication. For example, the configuration processing component 252 can modify the resources on which the side link channel communication to the receiver UE occurs based on the reconfigured PQI of the SLRBs, the release of some SLRBs, etc., which can be received in the indication from the base station, as described above. In another example, the configuration processing component 252 can modify the RAT or interface used on the side link channel, the Uu path to the base station (e.g., for a transmitter UE or a receiver UE), the side link path to the receiver UE, etc.

[0081] Figure 6 A flow chart illustrating an example of a method 600 for configuring a UE to perform RRM measurements over a sidelink is shown. In an example, a base station (e.g., base station 102 or other network component) may use Figure 1 and Figure 3 One or more components described in the method 600 may be used to perform the functions described in the method 600.

[0082] In method 600, at block 602, an RRM configuration for measuring and reporting signals received from one or more devices in sidelink resources may be sent. In one aspect, configuration component 342, for example, in conjunction with processor 312, memory 316, transceiver 302, etc., may send an RRM configuration for measuring and reporting signals received from one or more devices in sidelink resources. As described, in an example, configuration component 342 may use RRC signaling to send the RRM configuration (and / or a portion thereof) to a transmitter UE and / or a receiver UE. In another example, configuration component 342 may use an SIB or other broadcast mechanism to broadcast the RRM configuration (and / or a portion thereof) to multiple UEs. In addition, for example, the RRM configuration may include one or more parameters related to measuring the transmitter UE on the sidelink, such as described above, such as a periodic timer, a trigger or other event detection parameter, an L3 filter coefficient, a number of reports, etc.

[0083] In an example, when the RRM configuration is sent at block 602, the RRM configuration can optionally be sent to a transmitter device for forwarding to a receiver device via a sidelink at block 604. In one aspect, configuration component 342, for example, in conjunction with processor 312, memory 316, transceiver 302, etc., can send the RRM configuration to a transmitter device (e.g., UE 104-a) for forwarding to a receiver device (e.g., UE 104-b) via a sidelink. For example, configuration component 342 can send the RRM configuration to the transmitter UE using RRC signaling. As described, the transmitter UE can receive the RRM configuration and can forward or send at least a portion of the configuration to the receiver UE using PC5 RRC.

[0084] In another example, at block 602, an RRM configuration is sent, and optionally at block 606, the RRM configuration can be sent to a receiver device. In one aspect, configuration component 342, for example, in conjunction with processor 312, memory 316, transceiver 302, etc., can send the RRM configuration to the receiver device. For example, configuration component 342 can send the RRM configuration to the receiver device using RRC signaling, and / or can broadcast the RRM configuration to multiple devices including the receiver device. In one example, configuration component 342 can use different types of signaling to send portions of the RRM configuration (e.g., broadcast some parameters, send other parameters via RRC, etc.).

[0085] In method 600, at block 608, a report of one or more signal parameters of a signal measured by the device from one or more other devices may be received from the device based on an RRM configuration. In one aspect, report processing component 352, for example, in conjunction with processor 312, memory 316, transceiver 302, configuration component 342, etc., may receive a report of one or more signal parameters of a signal measured by the device from one or more other devices (e.g., one or more transmitter devices) based on the RRM configuration from the device (e.g., a receiver device). For example, report processing component 352 may receive a report based on parameters in the RRM configuration (e.g., based on periodicity or other event detection, based on L3 filter coefficients, based on the number of reports to be indicated in the report, etc.). Furthermore, as described, the report may include various reported parameters, including a transmitter UE identifier corresponding to the measured signal, a measured quantity (e.g., cell or beam RSRP, RSRQ, SINR, CBR, etc.), a CC index associated with the measured quantity, a BWP ID associated with the measured quantity, etc., as described above. Report processing component 352 can perform one or more functions based on the received report (eg, modify sidelink communications).

[0086] In method 600, optionally at block 610, an indication of reconfiguration or release of resources corresponding to a sidelink channel may be sent based on the receipt of a report. In one aspect, the report processing component 352, for example, in combination with the processor 312, the memory 316, the transceiver 302, the configuration component 342, etc., may send an indication of reconfiguration or release of resources corresponding to a sidelink channel based on the receipt of a report. For example, the report processing component 352 may determine to reconfigure or release resources of the sidelink (e.g., reconfigure the PQI or other parameters of the SLRB or release the SLRB) based on the measurement report. For example, in the event that the receiver UE reports a measurement below a threshold for the current transmitter UE or a measurement reaching a threshold for another transmitter UE, the report processing component 352 may determine to reconfigure or release the SLRB of the current transmitter UE (e.g., in favor of the SLRB of another transmitter UE for the receiver UE). The report processing component 352 may indicate the reconfiguration or release of resources to the transmitter UE to facilitate the transmitter UE (or another transmitter UE) to notify the receiver UE about the modification of the resources.

[0087] In method 600, optionally at block 612, at least one of a RAT or interface for a sidelink channel, a Uu path, or a sidelink path can be reselected based on the received report. In one aspect, report processing component 352, for example, in conjunction with processor 312, memory 316, transceiver 302, configuration component 342, etc., can reselect at least one of a RAT or interface for a sidelink channel, a Uu path, or a sidelink path based on the received report. For example, this can include report processing component 352 instructing a transmitter UE to use a different RAT or interface for a sidelink channel, or to use a different sidelink path. The transmitter UE may use a different RAT or interface or path when modifying communications with a receiver UE. In one example, this can include report processing component 352 determining to modify one or more beams used for communication with a receiver UE (e.g., on a Uu path or a sidelink path), and configuration component 342 can accordingly modify the beams used by base station 102 and / or can instruct the transmitter UE to modify the beams used for communication with the receiver UE.

[0088] Figure 7Examples of systems 700, 702, 704 for sending RRM configurations to receiver UEs are shown. As previously described, in resource allocation mode 1, the NW may have full control over RRM. Mode 1 is applicable to CONNECTED UEs. In one example, SLRBs may only be configured by the NW via RRC. For example, the NW may configure resources via RRC, e.g., without UE autonomous resource selection. For example, in system 700, the measurement configuration process may include the NW sending the RRM configuration for the SL to the TX in RRCReconfiguration via Uu RRC (SRB1 or SRB3). Upon receiving the measurement configuration from the NW, the SL TX stores it and forwards it to its peer via PC5 RRC. For example, in system 702, the measurement configuration process may include the NW sending the RRM configuration for the SL directly to the RX in RRCReconfiguration via Uu RRC (SRB1 or SRB3). For example, in system 704, the measurement configuration process may include the NW broadcasting the RRM configuration for the SL in the SIB. Whenever a UE is an RxUE in a SL unicast connection, it may follow the measurement reporting procedure.

[0089] Figure 8 An example of a system 800 for reporting RRM measurements is shown. For example, when triggered / timer expires, the SL RX reports available measurements to the NW via a measurement report message. Reporting measurements to the SL TX may not be necessary, as the NW can have full control in Mode 1. The report content includes the TX UE ID, the measured quantity (e.g., available cell RSRP / RSRQ / SINR / CBR, available beam RSRP / RSRQ / SINR), the CC index associated with the measured quantity (e.g., for CA management purposes, NW reconfiguration of the SL's CC set, where the TX can activate or deactivate CCs, etc.), the BWP ID associated with the measured quantity (for BWP management purposes, such as NW reconfiguration / change / addition of the BWP set for the sidelink, where the TX UE can switch BWPs via MAC-CE or DCI, which is invisible to the NW), etc., as described. Upon receiving the measurement report from the SL, the NW implementation can determine one or more actions to perform, such as reconfiguring the PQI of the SLRB, releasing the SLRB, RAT / interface reselection, or Uu / SL path reselection, etc., as described.

[0090] Figure 9 1 is a block diagram of a MIMO communication system 900 including a base station 102 and a UE 104 according to various aspects of the present disclosure. The MIMO communication system 900 may be described with reference to Figure 1 The base station 102 may be a reference to the aspects of the wireless communication access network 100 described in detail. Figure 1Examples of various aspects of base station 102 are described. Additionally, UE 104 can communicate with another UE via sidelink resources using similar functionality as described herein with respect to communication between UE 104 and base station 102.

[0091] Base station 102 may be equipped with antennas 934 and 935, and UE 104 may be equipped with antennas 952 and 953. In MIMO communication system 900, base station 102 is capable of simultaneously transmitting data over multiple communication links. Each communication link may be referred to as a "layer," and the "rank" of a communication link may indicate the number of layers used for communication. For example, in a 2x2 MIMO communication system where base station 102 transmits two "layers," the rank of the communication link between base station 102 and UE 104 is two.

[0092] At the base station 102, a transmit (Tx) processor 920 may receive data from a data source. The transmit processor 920 may process the data. The transmit processor 920 may also generate control symbols or reference symbols. Where applicable, a transmit MIMO processor 930 may perform spatial processing (e.g., precoding) on ​​the data symbols, control symbols, or reference symbols, and may provide an output symbol stream to transmit modulators / demodulators 932 and 933. Each modulator / demodulator 932 to 933 may process a corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator / demodulator 932 to 933 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a DL signal. In one example, the DL signals from the modulators / demodulators 932 and 933 may be transmitted via antennas 934 and 935, respectively.

[0093] UE 104 may be a reference Figure 1-2 Examples of various aspects of UE 104 are described. At UE 104, UE antennas 952 and 953 can receive DL signals from base station 102 and can provide received signals to modulators / demodulators 954 and 955, respectively. Each modulator / demodulator 954 to 955 can condition (e.g., filter, amplify, downconvert, and digitize) a corresponding received signal to obtain input samples. Each modulator / demodulator 954 to 955 can further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 956 can obtain received symbols from modulators / demodulators 954 and 955, perform MIMO detection on the received symbols when applicable, and provide detected symbols. A receive (Rx) processor 958 can process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 104 to a data output, and provide decoding control information to a processor 980 or memory 982.

[0094] In some cases, processor 980 may execute stored instructions to instantiate communication component 242 (see, e.g., Figure 1 and Figure 2 ).

[0095] On the uplink (UL), at UE 104, a transmit processor 964 may receive and process data from a data source. The transmit processor 964 may also generate reference symbols for a reference signal. The symbols from transmit processor 964 may be precoded by a transmit MIMO processor 966, if applicable, further processed by modulators / demodulators 954 and 955 (e.g., for SC-FDMA, etc.), and transmitted to base station 102 based on communication parameters received from base station 102. At base station 102, the UL signals from UE 104 may be received by antennas 934 and 935, processed by modulators / demodulators 932 and 933, detected by a MIMO detector 936, if applicable, and further processed by a receive processor 938. The receive processor 938 may provide decoded data to a data output and processor 940 or memory 942.

[0096] In some cases, processor 940 may execute stored instructions to instantiate configuration component 342 (see, e.g., Figure 1 and Figure 3 ).

[0097] The components of the UE 104 may be implemented individually or collectively with one or more application-specific integrated circuits (ASICs) adapted to perform some or all applicable functions in hardware. Each of the modules may be a unit for performing one or more functions related to the operation of the MIMO communication system 900. Similarly, the components of the base station 102 may be implemented individually or collectively with one or more ASICs adapted to perform some or all applicable functions in hardware. Each of the components may be a unit for performing one or more functions related to the operation of the MIMO communication system 900.

[0098] The following aspects are merely illustrative, and aspects thereof may be combined with aspects of other embodiments or teachings described herein without limitation.

[0099] Aspect 1 is a wireless communication method, comprising: receiving, by a first device, a radio resource measurement (RRM) configuration for measuring and reporting signals received from one or more devices in a side link resource; measuring the signals received from the one or more devices based on the RRM configuration; and sending a report of one or more signal parameters of the measured signals to a base station based on the RRM configuration.

[0100] In aspect 2, the method of aspect 1 includes: wherein receiving the RRM configuration includes receiving the RRM configuration from the second device via a side link.

[0101] In aspect 3, the method of aspect 2 includes: wherein receiving the RRM configuration includes receiving the RRM configuration from the second device using PC5 Radio Resource Control (RRC) signaling.

[0102] In aspect 4, the method of any one of aspects 1 to 3 includes: wherein receiving the RRM configuration includes receiving the RRM configuration from a base station.

[0103] In aspect 5, the method of any one of aspects 1 to 4 includes: wherein receiving the RRM configuration includes receiving the RRM configuration from the base station in radio resource control (RRC) signaling.

[0104] In aspect 6, the method of any one of aspects 1 to 5 includes: wherein receiving the RRM configuration includes receiving the RRM configuration from the base station in a system information block (SIB).

[0105] In aspect 7, the method of any one of aspects 1 to 6 includes: wherein the RRM configuration indicates at least one of the following: a periodic timer for periodically measuring and reporting signals received from one or more devices, a trigger condition or event type for determining measurement and reporting of signals received from one or more devices, layer 3 filter coefficients for a cell or beam, or a number of reports included in a report of signals received from one or more devices.

[0106] In aspect 8, the method of any one of aspects 1 to 7 includes: wherein, for each device of the one or more devices, the report includes at least one of a device identifier, a component carrier index for one of the one or more signal parameters, or a bandwidth part (BWP) identifier for one of the one or more signal parameters.

[0107] Aspect 9 is a method for wireless communication, comprising: receiving, by a first device, a radio resource measurement (RRM) configuration from a base station for measuring and reporting signals received from one or more devices in a sidelink resource; and sending, by the first device, the RRM configuration to a second device via a sidelink channel.

[0108] In aspect 10, the method of aspect 9 includes receiving a resource configuration for the sidelink channel from a base station.

[0109] In aspect 11, the method of any one of aspects 9 or 10 includes: wherein receiving the RRM includes receiving the RRM in radio resource control (RRC) signaling.

[0110] In aspect 12, the method of any one of aspects 9 to 11 includes: wherein sending the RRM configuration includes sending the RRM configuration using PC5 Radio Resource Control (RRC) signaling.

[0111] In aspect 13, the method of any one of aspects 9 to 12 includes: wherein the RRM configuration indicates at least one of the following: a periodic timer for periodically measuring and reporting signals received from one or more devices, a trigger condition or event type for determining measurement and reporting of signals received from one or more devices, layer 3 filter coefficients for a cell or beam, or a number of reports included in a report of signals received from one or more devices.

[0112] In aspect 14, the method of any one of aspects 9 to 13 includes receiving an indication of reconfiguration or release of resources corresponding to the sidelink channel from the base station based on the report from the second device.

[0113] Aspect 15 is a method for wireless communication, comprising: sending a radio resource measurement (RRM) configuration for measuring and reporting signals received from one or more devices in a sidelink resource, and receiving a report from the device of one or more signal parameters of the signals measured by the device from the one or more devices based on the RRM configuration.

[0114] In aspect 16, the method of aspect 15 includes: wherein sending the RRM configuration includes sending the RRM configuration to the transmitting device for forwarding to the device via a sidelink.

[0115] In aspect 17, the method of aspect 16 includes: wherein sending the RRM configuration includes sending the RRM configuration to the transmitting device using radio resource control (RRC) signaling.

[0116] In aspect 18, the method of any one of aspects 15 to 17 includes: wherein sending the RRM configuration includes sending the RRM configuration to the device using radio resource control (RRC) signaling.

[0117] In aspect 19, the method of any one of aspects 15 to 18 includes: transmitting the RRM configuration includes broadcasting the RRM configuration in a system information block (SIB).

[0118] In aspect 20, the method of any one of aspects 15 to 19 includes: wherein the RRM configuration indicates at least one of the following: a periodic timer for periodically measuring and reporting signals received from one or more devices, a trigger condition or event type for determining measurement and reporting of signals received from one or more devices, layer 3 filter coefficients for a cell or beam, or a number of reports included in a report of signals received from one or more devices.

[0119] In aspect 21, the method of any one of aspects 15 to 20 includes: wherein, for each device of the one or more devices, the report includes at least one of a device identifier, a component carrier index for one of the one or more signal parameters, or a bandwidth part (BWP) identifier for one of the one or more signal parameters.

[0120] In aspect 22, the method of any one of aspects 15 to 21 includes sending an indication of reconfiguration or release of resources corresponding to the sidelink channel based on receiving the report.

[0121] In aspect 23, the method of any one of aspects 15 to 22 includes reselecting at least one of a radio access terminal (RAT) or an interface for the sidelink channel, the Uu path, or the sidelink path based on receiving the report.

[0122] Aspect 24 is an apparatus for wireless communication, comprising: a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the transceiver and the memory, wherein the one or more processors are configured to execute the instructions to perform the operations of one or more methods of any one of Aspects 1 to 23.

[0123] Aspect 25 is an apparatus for wireless communication, comprising means for performing the operations of one or more methods of any one of aspects 1 to 23.

[0124] Aspect 26 is a computer-readable medium comprising code executable by one or more processors to perform the operations of one or more methods of any one of Aspects 1 to 23.

[0125] The detailed description set forth above in conjunction with the accompanying drawings describes examples and does not represent the only examples that can be implemented or within the scope of the claims. The term "example" as used in this specification means "as an example, instance, or illustration" rather than "preferably" or "better than other examples." The detailed description includes specific details to provide an understanding of the described technology. However, these technologies can be practiced without these specific details. In some cases, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0126] The information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the foregoing description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, computer executable code or instructions stored on a computer-readable medium, or any combination thereof.

[0127] The various exemplary blocks and components described in connection with the present disclosure may be implemented or executed by a specially programmed device (e.g., but not limited to, a processor, a digital signal processor (DSP), an ASIC, a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof) for performing the functions described herein. The specially programmed processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The specially programmed processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in combination with a DSP core, or any other such configuration).

[0128] The functions described herein may be implemented in hardware, software, or any combination thereof. When implemented in software executed by a processor, the functions may be stored in a non-transient computer-readable medium or transmitted as one or more instructions or codes on a non-transient computer-readable medium. Other examples and implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a specially programmed processor, hardware, hardwiring, or any combination thereof. Features that implement the functions may also be physically located in various locations, including being distributed so that parts of the functions are implemented at different physical locations. In addition, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or." That is, unless otherwise specified or clear from the context, a phrase such as "X employs A or B" is intended to mean any naturally inclusive arrangement. That is, for example, the phrase "X employs A or B" satisfies any of the following conditions: X employs A; X employs B; or X employs both A and B. Additionally, as used herein, including in the claims, “or” used in a list of items beginning with “at least one of” means a disjunctive list so that, for example, “at least one of A, B, or C” means A or B or C or AB or AC or BC or ABC (A and B and C).

[0129] Computer readable medium comprises computer storage medium and communication medium, and wherein communication medium comprises any medium that is convenient to transmit computer program from one place to another place.Storage medium can be any available medium that can be accessed by general-purpose computer or special-purpose computer.By way of example and not limitation, computer readable medium can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage device or can be used for carrying or storing the program code unit of the expectation of instruction or data structure form and can be accessed by general-purpose computer or special-purpose computer or general-purpose processor or special-purpose processor any other medium.In addition, any connection can be suitably called computer readable medium.For example, if software is to use coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, wireless and microwave to transmit from website, server or other remote source, so coaxial cable, optical fiber cable, twisted pair, DSL or wireless technology such as infrared, wireless and microwave are included in the definition of described medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, where disks usually reproduce data magnetically, while discs use lasers to reproduce data optically. The above combinations should also be included within the scope of protection of computer-readable media.

[0130] The previous description of the present disclosure is provided to enable those skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. In addition, although the elements of the various aspects and / or embodiments described may be described or claimed in the singular, the plural is contemplated unless a limitation to the singular is explicitly stated. In addition, unless otherwise stated, all or part of any aspect and / or embodiment may be used together with all or part of any other aspect and / or embodiment. Therefore, the present disclosure is not limited to the examples and designs described herein, but is to be given the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication, comprising: receiving a resource configuration for a sidelink channel from a base station; receiving, by a first user equipment (UE) and in a system information block (SIB) broadcast by the base station, a radio resource measurement (RRM) configuration for measuring and reporting signals received from one or more UEs in sidelink resources; Sending, by the first UE and using PC5 radio resource control (RRC) signaling, the RRM configuration to the second UE via the sidelink channel; measuring, by the second UE, signals received from the one or more UEs based on the RRM configuration; sending, from the second UE to the base station, a report on one or more signal parameters of the measured signal based on the RRM configuration; receiving, from the base station and based on the report, an indication of reconfiguration or release of resources corresponding to the sidelink channel; as well as Based on receiving the report, at least one of a radio access technology (RAT) or an interface for a sidelink channel, a Uu path, or a sidelink path is reselected.

2. The method according to claim 1, wherein The RRM configuration indicates at least one of the following: a periodic timer for periodically measuring and reporting the signals received from the one or more UEs, a trigger condition or event type for determining the measurement and reporting of the signals received from the one or more UEs, layer 3 filter coefficients for a cell or beam, or a number of reports to be included in a report of the signals received from the one or more UEs.

3. The method according to claim 1, further comprising: Based on the indication, one or more parameters for communicating over the sidelink are modified.

4. A first user equipment (UE) for wireless communication, comprising: transceiver; a memory configured to store instructions; as well as one or more processors communicatively coupled to the transceiver and the memory, wherein the one or more processors are configured to: receiving a resource configuration for a sidelink channel from a base station; receiving, from the base station in a system information block (SIB) broadcast by the base station, a radio resource measurement (RRM) configuration for measuring and reporting signals received from one or more UEs in sidelink resources; sending the RRM configuration to the second UE via the sidelink channel using PC5 radio resource control (RRC) signaling; and receiving, from the base station and based on a report from the second UE regarding one or more signal parameters of signals received from the one or more UEs, an indication of reconfiguration or release of resources corresponding to the sidelink channel; Based on receiving the report, at least one of a radio access technology (RAT) or an interface for a sidelink channel, a Uu path, or a sidelink path is reselected.

5. The first UE according to claim 4, wherein: The RRM configuration indicates at least one of the following: a periodic timer for periodically measuring and reporting the signals received from the one or more UEs, a trigger condition or event type for determining the measurement and reporting of the signals received from the one or more UEs, layer 3 filter coefficients for a cell or beam, or a number of reports to be included in a report of the signals received from the one or more UEs. The first UE according to claim 4 , wherein: The one or more processors are further configured to modify one or more parameters for communicating over the side link based on the indication.

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