Network-assisted scheduling for packet replication in vehicle-based sidelink communications

Abstract

Methods, systems, and devices for wireless communications are described herein. A user equipment (UE) may determine that a profile for vehicle-based sidelink communications supports packet duplication using a set of carrier frequencies. The UE may send a request to a base station for resources for performing vehicle-based sidelink communications, the request including an indication of the profile, a reliability metric associated with the profile, and an identifier identifying the set of carrier frequencies. The UE may receive from the base station one or more grants for semi-persistently scheduled resources allocated on the set of carrier frequencies in response to the request.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims the benefit of U.S. Provisional Patent Application No. 62 / 631,445, titled “Network-Assisted Scheduling for Packet Duplication in Vehicle-Based Sidelink Communication,” filed by Wu et al. on February 15, 2018; and U.S. Patent Application No. 16 / 270,538, titled “Network-Assisted Scheduling for Packet Duplication in Vehicle-Based Sidelink Communication,” filed by Wu et al. on February 7, 2019; each of the above U.S. patent applications is assigned to the present assignee. Background Art

[0003] The following relates generally to wireless communications, and more particularly, to network-assisted scheduling for packet duplication in vehicle-based sidelink communications.

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, etc. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency and power). Examples of these multiple access systems include fourth generation (4G) systems, such as long term evolution (LTE) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems that can be referred to as new radio (NR) systems. These systems can use techniques such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM). A wireless multiple access communication system may include multiple base stations or network access nodes, each of which simultaneously supports communication for multiple communication devices, which may be referred to as user equipment (UE) in other aspects.

[0005] The wireless communication system may include or support a network for vehicle-based communications, also referred to as a vehicle-to-everything (V2X) network, a vehicle-to-vehicle (V2V) network, and / or a cellular V2X (C-V2X) network. The vehicle-based communication network may provide always-on telematics, wherein a UE (e.g., a vehicle UE (v-UE)) (e.g., via vehicle-to-network (V2N) communication) communicates directly to the network, to pedestrian UEs (e.g., via vehicle-to-pedestrian (V2P) communication), to infrastructure equipment (vehicle-to-infrastructure (V2I) communication), and to other v-UEs (e.g., via the network and / or directly via V2V communication). The vehicle-based communication network may support a safe, always-connected driving experience by providing intelligent connectivity (wherein service signals / timing, real-time services and routing, safety alerts to pedestrians / pedestrians, conflict avoidance information, etc. are exchanged).

[0006] Some wireless communication systems may also support Packet Data Convergence Protocol (PDCP) repetition. For example, PDCP repetition may be supported for carrier aggregation (CA) and / or dual connectivity (DC). CA may include a base station that aggregates multiple carriers (also referred to as component carriers (CCs)) for a UE, wherein the PDCP protocol data unit (PDU) is repeated on each carrier. DC may include two or more base stations, a master node (MN) and one or more secondary nodes (SN) that perform transmissions to the UE, wherein the PDCP PDU is replicated by each node.

[0007] Typically, CA packet replication using multiple carriers can be used to improve the reliability of V2X packet delivery. However, for network-assisted scheduling, traditional signaling design may not allow the UE and the base station to exchange enough information for the network to schedule a sufficient number of resources for sidelink communication grants. For semi-persistent scheduling (SPS), the base station can create multiple SPS grants in at least two different carriers for the UE to send the same PDCP PDU to other UEs using CA packet replication. Summary of the invention

[0008] The described technology relates to an improved method, system, device or apparatus for supporting network-assisted scheduling for packet replication in vehicle-based sidelink communications. In general, the described technology provides an effective mechanism that supports a signaling technique between a base station and a user equipment (UE) that improves scheduling to provide sufficient resources for vehicle-based sidelink communications using packet replication based on carrier aggregation (CA). In some aspects, this may include a UE determining that a service profile for vehicle-based sidelink communications supports packet replication using one or more component carriers (CCs). For example, a service class or service for vehicle-based sidelink communications may have a specific reliability metric that guarantees packet replication in order to meet a reliability threshold. Therefore, the UE may send a request to a base station for resources for the UE to perform vehicle-based sidelink communications. The request may be sent to the base station in one or two messages, each of which includes certain information associated with vehicle-based sidelink communications. For example, a first message may include or otherwise provide an indication of a profile (e.g., a service profile, a service type, etc.), and a set of carrier frequencies that can be used to identify vehicle-based sidelink communications. The second message may provide information based at least in part on the profile (eg, such as an index to a traffic profile) and an indication of a reliability metric associated with the vehicle-based sidelink communication.

[0009] In some aspects, the base station may receive the request and determine whether to support packet duplication for the UE, and if so, how to support packet duplication for the UE. For example, if the base station decides to allow packet duplication (e.g., there are sufficient resources, the profile guarantees the allocation of CCs, etc.), the base station may send one or more grants for semi-persistent scheduling (SPS) resources that have been allocated on the carrier frequency set. In some examples, the base station may use an SPS configuration information element in a radio resource control (RRC) message to provide an indication of one or more grants. The UE may receive one or more grants from the base station and perform vehicle-based sidelink communications using the SPS resources on the carrier frequency set.

[0010] A method of wireless communication at a user equipment is described. The method may include: determining that a profile for vehicle-based sidelink communication supports packet replication using a set of carrier frequencies, sending a request to a base station for resources for performing vehicle-based sidelink communication, the request including: an indication of the profile, a reliability metric associated with the profile, and an identifier identifying the set of carrier frequencies, and receiving from the base station one or more grants for SPS resources allocated on the set of carrier frequencies in response to the request.

[0011] An apparatus for wireless communication at a user equipment is described. The apparatus may include: means for determining that a profile for vehicle-based sidelink communication uses a set of carrier frequencies to support packet duplication, means for sending a request to a base station for resources for performing vehicle-based sidelink communication, the request including an indication of the profile, a reliability metric associated with the profile, and an identifier identifying the set of carrier frequencies, and means for receiving from the base station one or more grants for SPS resources allocated on the set of carrier frequencies in response to the request.

[0012] Another apparatus for wireless communication at a user equipment is described. The apparatus may include: a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be operable to cause the processor to perform the following operations: determine that a profile for vehicle-based sidelink communication supports packet replication using a set of carrier frequencies, send a request to a base station for resources for performing vehicle-based sidelink communication, the request including: an indication of the profile, a reliability metric associated with the profile, and an identifier identifying the set of carrier frequencies, and receive one or more grants from the base station for SPS resources allocated on the set of carrier frequencies in response to the request.

[0013] A non-transitory computer-readable medium for wireless communication at a user device is described. The non-transitory computer-readable medium may include instructions operable to cause a processor to: determine that a profile for vehicle-based sidelink communication supports packet replication using a set of carrier frequencies, send a request to a base station for resources for performing vehicle-based sidelink communication, the request including an indication of the profile, a reliability metric associated with the profile, and an identifier identifying the set of carrier frequencies, and receive from the base station one or more grants for SPS resources allocated on the set of carrier frequencies in response to the request.

[0014] Some examples of the above methods, apparatuses, and non-transitory computer-readable media may also include: a process, feature, unit, or instruction for sending a signal indicating that a set of carrier frequencies may be used to support packet duplication.

[0015] Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include processes, features, units, or instructions for sending a sidelink information message to a base station to indicate a profile and an identifier.

[0016] Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include: a process, feature, unit, or instruction for sending an auxiliary information message to a base station to indicate a reliability metric, wherein the auxiliary information message includes: an index value associated with a profile.

[0017] Some examples of the above methods, apparatuses, and non-transitory computer-readable media may also include: processes, features, units, or instructions for configuring an auxiliary information message to indicate a subset of carrier frequencies in a set of carrier frequencies to indicate the number of carrier frequencies used for packet duplication.

[0018] Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include: processes, features, units, or instructions for identifying a destination identifier for vehicle-based sidelink communications, wherein the profile may be based at least in part on a destination layer identifier.

[0019] Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include: processes, features, units, or instructions for receiving one or more grants in one or more downlink control indicators (DCIs) from a base station.

[0020] Some examples of the above methods, apparatuses, and non-transitory computer-readable media may also include: processes, features, units, or instructions for receiving more than one grant containing the same SPS index.

[0021] A method of wireless communication at a base station is described. The method may include receiving a request for resources from a UE, the request including an indication of a profile for vehicle-based sidelink communications, a reliability metric associated with the profile, and an identifier identifying a set of carrier frequencies to be used for packet replication during vehicle-based sidelink communications, and sending one or more grants to the UE for SPS resources allocated on the set of carrier frequencies in response to the request.

[0022] An apparatus for wireless communication at a base station is described. The apparatus may include: means for receiving a request for resources from a UE, the request including an indication of a profile for vehicle-based sidelink communication, a reliability metric associated with the profile, and an identifier identifying a set of carrier frequencies for packet replication during vehicle-based sidelink communication, and means for sending one or more grants for SPS resources allocated on the set of carrier frequencies to the UE in response to the request.

[0023] Another apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions are operable to cause the processor to receive a request for resources from a UE, the request including an indication of a profile for vehicle-based sidelink communication, a reliability metric associated with the profile, and an identifier identifying a set of carrier frequencies to be used for packet replication during vehicle-based sidelink communication, and to send one or more grants to the UE for SPS resources allocated on the set of carrier frequencies in response to the request.

[0024] A non-transitory computer-readable medium for wireless communication at a base station is described. The non-transitory computer-readable medium may include instructions operable to cause a processor to: receive a request for resources from a UE, the request including an indication of a profile for vehicle-based sidelink communications, a reliability metric associated with the profile, and an identifier for a set of carrier frequencies for packet replication during vehicle-based sidelink communications, and, in response to the request, send to the UE one or more grants for SPS resources allocated on the set of carrier frequencies.

[0025] Some examples of the above-mentioned methods, apparatus, and non-transitory computer-readable media may also include: processing, features, units, or instructions for determining whether to support packet replication for side link communications for the vehicle based at least in part on the request, wherein the one or more authorizations may be configured based at least in part on the determination.

[0026] Some examples of the above-mentioned methods, apparatuses, and non-transitory computer-readable media may also include: processes, features, units, or instructions for identifying a threshold value for vehicle-based sidelink communications, wherein the determination of whether to support packet replication may be based at least in part on a reliability metric satisfying the threshold.

[0027] Some examples of the above-described methods, apparatus, and non-transitory computer-readable media may also include: processes, features, apparatus, or instructions for identifying a set of carrier frequencies for packet replication based at least in part on at least one of: a reliability metric that satisfies a threshold, or the availability of side link resources, or a combination thereof.

[0028] In some examples of the above methods, apparatus, and non-transitory computer-readable media, sending one or more grants includes configuring an RRC message to indicate an SPS configuration and a corresponding SPS index associated with a set of carrier frequencies for packet duplication.

[0029] In some examples of the above methods, apparatus, and non-transitory computer-readable media, the SPS configuration may be associated with one or more authorizations that match a profile for vehicle-based sidelink communications.

[0030] Some examples of the above methods, apparatuses, and non-transitory computer-readable media may also include: a process, feature, unit, or instruction for receiving a signal indicating that a set of carrier frequencies may be used to support packet duplication.

[0031] Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include: a process, feature, unit, or instruction for receiving a sidelink information message indicating a profile and an identifier from a UE.

[0032] Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include: a process, feature, unit, or instruction for receiving an assistance information message indicating a reliability metric from a UE, wherein the assistance information message includes an index value associated with a profile.

[0033] Some examples of the above methods, apparatuses, and non-transitory computer-readable media may also include: processes, features, units, or instructions for decoding the auxiliary information message to identify a subset of carrier frequencies in a set of carrier frequencies indicating the number of carrier frequencies used for packet duplication.

[0034] In some examples of the above methods, apparatus, and non-transitory computer-readable media, the profile may be based at least in part on a destination identifier associated with the vehicle-based sidelink communication.

[0035] Some examples of the above methods, apparatuses, and non-transitory computer-readable media may also include: processes, features, units, or instructions for sending one or more grants in one or more DCIs containing an SPS index.

[0036] BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 An example of a wireless communication system supporting network-assisted scheduling for packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown.

[0038] Figure 2 An example of a wireless communication system supporting network-assisted scheduling for packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown.

[0039] Figure 3 An example of a method supporting network-assisted scheduling for packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown.

[0040] Figure 4 An example of a process in support of network-assisted scheduling for packet duplication in vehicle-based sidelink communications is shown, in accordance with an example of a process in accordance with aspects of the present disclosure.

[0041] Figure 5 and Figure 6 A block diagram of a user equipment (UE) supporting network-assisted scheduling for packet duplication in vehicle-based sidelink communications is shown in accordance with aspects of the present disclosure.

[0042] Figure 7 A block diagram of a communication manager supporting network-assisted scheduling for packet duplication in vehicle-based sidelink communications is shown in accordance with aspects of the present disclosure.

[0043] Figure 8 A block diagram of a system including devices supporting network-assisted scheduling for packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown.

[0044] Fig. 9 and Fig.10 A block diagram of a base station supporting network-assisted scheduling for packet duplication in vehicle-based sidelink communications is shown in accordance with aspects of the present disclosure.

[0045] Fig.11 A block diagram of a communication manager supporting network-assisted scheduling for packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown.

[0046] Fig.12 A block diagram of a system including devices supporting network-assisted scheduling for packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown.

[0047] Figures 13 to 15 A flow chart depicting a method for network-assisted scheduling of packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0048] Some wireless communication systems support packet data convergence protocol (PDCP) duplication, for example, for carrier aggregation (CA) and / or for dual connectivity (DC). For example, in a CA scenario, a base station may configure two or more component carriers (CCs) for use by a user equipment (UE), and the UE may repeat PDCP protocol data unit (PDU) packets on each carrier. Packet duplication may be used, for example, to improve the reliability of packet delivery.

[0049] Certain wireless communication systems may also support vehicle-based communications. Vehicle-based communications may include direct communications between a UE and a base station and / or may include sidelink communications between vehicle-based UEs. In some examples, resources for sidelink communications may be scheduled by a base station, or may be preconfigured and autonomously used by a UE. However, conventional wireless communication systems are not configured to support or otherwise allow packet duplication for vehicle-based sidelink communications using semi-persistent scheduling (SPS) resources.

[0050] First, aspects of the present disclosure are described in the context of a wireless communication system. Aspects of the present disclosure provide implementations of signaling techniques between a base station and a vehicle-based UE that support the allocation of SPS resources on a carrier frequency set for vehicle-based sidelink communications involving packet duplication. For example, a UE may start by sending a sidelink information message (e.g., a request) to a base station, and the sidelink information message signals its intention to perform vehicle-based sidelink communications. The sidelink information message may include or otherwise convey an indication of a service profile (e.g., two identifiers of the destination layer) and an indication of the allowed carrier frequency for transmission and potential CA operations. The UE may also send an auxiliary information message (e.g., a request) to the base station to report a reliability metric associated with the service profile. The auxiliary information message (e.g., a request) may also include information associated with the service profile (e.g., an index associated with the service profile indicated in the sidelink information message). In some examples, the auxiliary information message (e.g., a request) may optionally include: an indication of the number of carrier frequencies to be used for packet indication.

[0051] The base station may receive a request from the UE and respond with one or more grants. In certain aspects, the grant may provide a rule that the UE uses to determine the number of packets to be copied. In some examples, the rule may be based on a reliability metric associated with a traffic profile. Thus, the UE may receive from the base station one or more grants for SPS resources already allocated on a set of carrier frequencies, and use these resources to perform vehicle-based sidelink communications using packet replication.

[0052] Aspects of the present disclosure are further illustrated and described by apparatus diagrams, system diagrams, and flow diagrams related to network-assisted scheduling for packet duplication in vehicle-based sidelink communications.

[0053] Figure 1An example of a wireless communication system 100 that supports network-assisted scheduling for packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown. The wireless communication system 100 includes a base station 105, a UE 115, and a core network 130. In some examples, the wireless communication system 100 can be a long-term evolution (LTE) network, an advanced LTE (LTE-A) network, an LTE-A Pro network, or a new radio (NR) network. In some cases, the wireless communication system 100 can support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low-latency communications, or communications with low-cost and low-complexity devices.

[0054] The base station 105 may communicate wirelessly with the UE 115 via one or more base station antennas. The base station 105 described herein may include or may be referred to by those skilled in the art as a base station transceiver, a radio base station, an access point, a radio transceiver, a node B, an eNodeB (eNB), a next generation node B or a giga-nodeB (either of which may be referred to as a gNB), a home node B, a home eNodeB, or some other suitable term. The wireless communication system 100 may include different types of base stations 105 (e.g., macro cell base stations or small cell base stations). The UE 115 described herein may be able to communicate with various types of base stations 105 and network devices, including macro eNBs, small cell eNBs, gNBs, relay base stations, etc.

[0055] Each base station 105 may be associated with a particular geographic coverage area 110 in which communications with various UEs 115 are supported. Each base station 105 may provide communications coverage for a respective geographic coverage area 110 via a communications link 125, and the communications link 125 between the base station 105 and the UE 115 may utilize one or more carriers. The communications link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. Downlink transmissions may also be referred to as forward link transmissions, and uplink transmissions may also be referred to as reverse link transmissions.

[0056] The geographic coverage area 110 of the base station 105 can be divided into multiple sectors, which constitute only a portion of the geographic coverage area 110, and each sector can be associated with a cell. For example, each base station 105 can provide communication coverage for a macro cell, a small cell, a hotspot, or other types of cells or various combinations thereof. In some examples, the base station 105 can be mobile and thus provide communication coverage for a mobile geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, and overlapping geographic coverage areas 110 associated with different technologies can be supported by the same base station 105 or by different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous LTE / LTE-A / LTE-A Pro or NR network, wherein different types of base stations 105 provide coverage for various geographic coverage areas 110.

[0057] The term "cell" refers to a logical communication entity used to communicate with a base station 105 (e.g., via a carrier), and may be used to distinguish between identifiers (e.g., physical cell identifier (PCID), virtual cell identifier (VCID)) used to distinguish neighbor cells operating via the same or different carriers. In some examples, a carrier may support multiple cells and may provide access to different types of devices based on different protocol types (e.g., machine type communication (MTC), narrowband Internet of Things (NB-IoT), enhanced mobile broadband (eMBB)), or other). In some cases, the term "cell" may refer to a portion of a geographic coverage area 110 (e.g., a sector) on which the logical entity operates.

[0058] UE 115 can be scattered throughout the wireless communication system 100, and each UE 115 can be stationary or mobile. UE 115 can also be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscription device, or some other suitable terminology, wherein the "device" can also be referred to as a unit, a station, a terminal, or a client. UE 115 can also be a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 can also refer to a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or an MTC device, etc., which can be implemented in various items such as household appliances, vehicles, and meters.

[0059] Some UEs 115 (e.g., MTC or IoT devices) may be low-cost or low-complexity devices and may provide automatic communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters for measuring or capturing information and relaying the information to a central server or application that can utilize the information or present the information to a person interacting with the program or application. Some UEs 115 may be designed to collect information or implement automatic behavior of machines. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based commercial billing.

[0060] Some UEs 115 may be configured to employ an operating mode that reduces power consumption, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but not simultaneous transmission and reception). In some examples, half-duplex communication may be performed at a reduced peak rate. Other power saving techniques for UE 115 include entering a power-saving "deep sleep" mode when not engaged in active communication or operating on a limited bandwidth (e.g., according to narrowband communication). In some cases, UE 115 may be designed to support critical functions (e.g., mission-critical functions), and the wireless communication system 100 may be configured to provide ultra-reliable communications for these functions.

[0061] In some cases, UE 115 may also be able to communicate directly with other UE 115 (e.g., using a point-to-point (P2P) or device-to-device (D2D) protocol). One or more UEs in a group of UEs 115 utilizing D2D communication may be located within the geographic coverage area 110 of the base station 105. Other UEs 115 in such a group of UEs may be located outside the geographic coverage area 110 of the base station 105, or may otherwise be unable to receive transmissions from the base station 105. In some cases, a group of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, in which each UE 115 transmits to each other UE 115 in the group of UEs. In some cases, the base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without the involvement of the base station 105.

[0062] The base stations 105 may communicate with the core network 130 and with each other. For example, the base stations 105 may interface with the core network 130 via a backhaul link 132 (e.g., via S1 or other interface). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105) or indirectly (e.g., via the core network 130) via a backhaul link 134 (e.g., via X2 or other interface).

[0063] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connections, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC), which may include at least one mobility management entity (MME), at least one serving gateway (S-GW), and at least one packet data network (PDN) gateway (P-GW). The MME may manage non-access stratum (e.g., control plane) functions for UE 115 served by a base station 105 associated with the EPC, such as mobility, authentication, and bearer management. User IP packets may be transmitted via the S-GW, which itself may be connected to the P-GW. The P-GW may provide IP address allocation and other functions. The P-GW may be connected to a network operator IP service. Operator IP services may include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or a packet switched (PS) streaming service.

[0064] At least some of the network devices, such as base stations 105, may include subcomponents such as access network entities, which may be examples of access node controllers (ANCs). Each access network entity may communicate with UE 115 through multiple other access network transport entities, which may be referred to as radio heads, smart radio heads, or transmit / receive points (TRPs). In some configurations, the various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or merged into a single network device (e.g., base station 105).

[0065] The wireless communication system 100 can operate using one or more frequency bands typically in the range of 300 MHz to 300 GHz. Typically, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the length of the wavelength ranges from about 1 decimeter to 1 meter. Buildings and environmental features may block or redirect UHF waves. However, the waves can penetrate the structure sufficiently for the macro cell to provide service to the UE 115 located indoors. Transmission of UHF waves can be associated with smaller antennas and shorter ranges (e.g., less than 100 km) compared to transmission using smaller frequencies and longer waves in the high frequency (HF) or very high high frequency (VHF) portion of the spectrum below 300 MHz.

[0066] The wireless communication system 100 may also operate in the Super High Frequency (SHF) region using frequency bands from 3 GHz to 30 GHz (also referred to as centimeter bands). The SHF region includes frequency bands such as the 5 GHz Industrial, Scientific, and Medical (ISM) band, which may be used from time to time by devices that can tolerate interference from other users.

[0067] The wireless communication system 100 can also operate in the very high frequency (EHF) region (also called millimeter band) of the spectrum (e.g., from 30 GHz to 300 GHz). In some examples, the wireless communication system 100 can support millimeter wave (mmW) communications between the UE 115 and the base station 105, and the EHF antennas of each device can even be smaller and more closely spaced than the UHF antennas. In some cases, this can contribute to the use of antenna arrays within the UE 115. However, compared with SHF or UHF transmissions, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter distances. The technology disclosed herein can be adopted on transmissions using one or more different frequency regions, and the designated use of frequency bands across these frequency regions may vary from country to country or regulatory agency.

[0068] In some cases, the wireless communication system 100 can utilize licensed radio frequency spectrum bands and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 can adopt license assisted access (LAA), unlicensed LTE (LTE-U) radio access technology, or NR technology in unlicensed bands such as the 5GHz ISM band. When operating in an unlicensed radio frequency spectrum band, wireless devices such as base stations 105 and UE 115 can adopt a listen-before-talk (LBT) process to ensure that the frequency channel is idle before sending data. In some cases, operations in unlicensed bands can be combined with CCs operating in licensed bands (e.g., LAA) based on CA configuration. Operations in unlicensed spectrum can include downlink transmissions, uplink transmissions, point-to-point transmissions, or a combination of these. Duplexing in unlicensed spectrum can be based on frequency division duplexing (FDD), time division duplexing (TDD), or a combination of both.

[0069] In some examples, the base station 105 or UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. For example, the wireless communication system 100 may use a transmission scheme between a transmitting device (e.g., a base station 105) and a receiving device (e.g., a UE 115), wherein the transmitting device is equipped with multiple antennas and the receiving device is equipped with one or more antennas. MIMO communications may increase spectral efficiency by employing multipath signal propagation by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing. Multiple signals may be transmitted, for example, by a transmitting device via different antennas or different combinations of antennas. Similarly, multiple signals may be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams. Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO technology includes single-user MIMO (SU-MIMO) and multi-user MIMO (MU-MIMO), in which multiple spatial layers are sent to the same receiving device, and in which multiple spatial layers are sent to multiple devices.

[0070] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105 or a UE 115) to shape or steer an antenna beam (e.g., a transmit beam or a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals transmitted via antenna elements of an antenna array so that signals propagating at a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals transmitted via antenna elements may include a transmitting device or a receiving device applying specific amplitude and phase offsets to signals carried via each antenna element associated with the device. Adjustments associated with each antenna element may be defined by a set of beamforming weights associated with a particular direction (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other direction).

[0071] In one example, the base station 105 may use multiple antennas or antenna arrays to perform beamforming operations for directional communication with the UE 115. For example, the base station 105 may send some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) multiple times in different directions, which may include signals sent according to different beamforming weight sets associated with different transmission directions. Transmissions in different beam directions may be used (e.g., by the base station 105 or a receiving device such as the UE 115) to identify the beam direction for subsequent transmission and / or reception by the base station 105. The base station 105 may send some signals in a single beam direction (e.g., a direction associated with a receiving device such as the UE 115), such as a data signal associated with a specific receiving device. In some examples, the beam direction associated with transmission along a single beam direction may be determined based on signals sent in different beam directions. For example, the UE 115 may receive one or more of the signals sent by the base station 105 in different directions, and the UE 115 may report to the base station 105 an indication of the signal it has received with the highest signal quality or other acceptable signal quality. Although these techniques are described with reference to signals sent by base station 105 in one or more directions, UE 115 may employ similar techniques for sending signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by UE 115) or for sending signals in a single direction (e.g., for sending data to a receiving device).

[0072] When receiving various signals such as synchronization signals, reference signals, beam selection signals, or other control signals from the base station 105, a receiving device (e.g., UE 115, which may be an example of a mmW receiving device) may try multiple receive beams. For example, the receiving device may try multiple receive directions by receiving via different antenna subarrays, processing the received signal according to different antenna subarrays, receiving according to different receive beamforming weight sets applied to the signal received at multiple antenna elements of the antenna array, or processing the received signal according to different receive beamforming weight sets applied to the signal received at multiple antenna elements of the antenna array, any of which may be referred to as "listening" according to different receive beams or receive directions. In some examples, the receiving device may receive along a single beam direction using a single receive beam (e.g., when receiving a data signal). The single receive beam may be aligned on a beam direction determined based on listening according to different receive beam directions (e.g., a beam direction determined to have the highest signal strength, the highest signal-to-noise ratio, or other acceptable signal quality based on listening according to multiple beam schemes).

[0073] In some cases, the antennas of a base station 105 or a UE 115 may be located within one or more antenna arrays that may support MIMO operations, or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly such as an antenna tower. In some cases, the antennas or antenna arrays associated with a base station 105 may be located at different geographic locations. A base station 105 may have an antenna array with multiple rows and columns of antenna ports that the base station 105 may use to support beamforming for communicating with a UE 115. Likewise, a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.

[0074] In some cases, the wireless communication system 100 can be a packet-based network that operates according to a layered protocol stack. In the user plane, the communication at the bearer or PDCP layer can be IP-based. In some cases, the radio link control (RLC) layer can perform packet segmentation and reorganization to communicate through logical channels. The media access control (MAC) layer can perform priority processing and multiplex logical channels into transport channels. The MAC layer can also use hybrid automatic repeat request (HARQ) to provide retransmission at the MAC layer, thereby improving link efficiency. In the control plane, the radio resource control (RRC) protocol layer can provide the establishment, configuration and maintenance of the RRC connection between the UE 115 and the base station 105 or the core network 130 that supports the radio bearer for user plane data. At the physical (PHY) layer, the transport channel can be mapped to the physical channel.

[0075] In some cases, UE 115 and base station 105 can support retransmission of data to increase the possibility of successfully receiving data. HARQ feedback is a technique that increases the possibility of correctly receiving data through communication link 125. HARQ can include a combination of error detection (e.g., using cyclic redundancy check (CRC)), forward error correction (FEC) and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve the throughput at the MAC layer under poor radio conditions (e.g., signal-to-noise conditions). In some cases, a wireless device can support same-slot HARQ feedback, wherein the device can provide HARQ feedback for data received in a previous symbol in the slot in a specific slot. In other cases, the device can provide HARQ feedback in subsequent slots or according to some other time intervals.

[0076] The time interval in LTE or NR can be expressed as a multiple of the basic time unit, which can, for example, refer to a sampling period of Ts = 1 / 30,720,000 seconds. The time interval of the communication resources can be organized according to radio frames of a duration of 10 milliseconds (ms), where the frame period can be expressed as Tf = 307,200Ts. The radio frame can be identified by a system frame number (SFN) ranging from 0 to 1023. Each frame can include 10 subframes numbered from 0 to 9, and each subframe can have a duration of 1ms. A subframe can be further divided into 2 time slots, each time slot has a duration of 0.5ms, and each time slot can contain 6 or 7 modulation symbol periods (for example, depending on the length of the cyclic prefix preceding each symbol period). In addition to the cyclic prefix, each symbol period can contain 2048 sampling periods. In some cases, a subframe can be the smallest scheduling unit of the wireless communication system 100 and can be referred to as a transmission time interval (TTI). In other cases, the minimum scheduling unit of the wireless communication system 100 may be shorter than a subframe or may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) or in selected component carriers using sTTIs).

[0077] In some wireless communication systems, a time slot can be further divided into multiple mini-time slots containing one or more symbols. In some cases, the symbol of a mini-time slot or a mini-time slot can be the minimum unit of scheduling. For example, the duration of each symbol can vary according to the subcarrier spacing or the operating frequency band. In addition, some wireless communication systems can implement time slot aggregation, wherein multiple time slots or mini-time slots are aggregated together and used for communication between UE 115 and base station 105.

[0078] The term "carrier" refers to a collection of radio frequency spectrum resources with a defined physical layer structure for supporting communications on the communication link 125. For example, a carrier of the communication link 125 may include a portion of a radio frequency spectrum band that operates according to a physical layer channel for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. A carrier may be associated with a predefined frequency channel (e.g., an Evolved Universal Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be located according to a channel grid so as to be discovered by a UE 115. A carrier may be downlink or uplink (e.g., in FDD mode), or may be configured to carry downlink communications and uplink communications (e.g., in TDD mode). In some examples, a signal waveform transmitted on a carrier may be composed of multiple subcarriers (e.g., using a multi-carrier modulation (MCM) technique such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform-spread-OFDM (DFT-s-OFDM)).

[0079] The organization structure of the carrier may be different for different radio access technologies (e.g., LTE, LTE-A, LTE-A Pro, NR, etc.). For example, communications on a carrier may be organized based on TTIs or time slots, each of which may include user data and control information or signaling to support decoding of the user data. A carrier may also include dedicated acquisition signaling (e.g., synchronization signals or system information, etc.) and control signaling to coordinate operations for the carrier. In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling to coordinate operations for other carriers.

[0080] Physical channels may be multiplexed on a carrier according to various techniques. For example, a physical control channel and a physical data channel may be multiplexed on a downlink carrier using a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. In some examples, control information sent in a physical control channel may be distributed between different control regions in a cascaded manner (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces).

[0081] A carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or wireless communication system 100. The carrier bandwidth may be one of a plurality of predetermined bandwidths of a carrier for a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz). In some examples, each served UE 115 may be configured to operate on part or all of the carrier bandwidth. In other examples, some UEs 115 may be configured to operate using a narrowband protocol type that is associated with a predefined portion or range (e.g., a set of subcarriers or RBs) within a carrier (e.g., an "in-band" deployment of a narrowband protocol type).

[0082] In a system using MCM technology, a resource element may consist of a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period is inversely proportional to the subcarrier spacing. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme). Therefore, the more resource elements received by UE 115 and the higher the order of the modulation scheme, the higher the data rate of UE 115. In a MIMO system, wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and space resources (e.g., space layers), and the use of multiple space layers may further increase the data rate for communicating with UE 115.

[0083] A device (e.g., base station 105 or UE 115) of wireless communication system 100 may have a hardware configuration that supports communication on a specific carrier bandwidth, or may be configured to support communication on one of a set of carrier bandwidths. In some examples, wireless communication system 100 may include base station 105 and / or UE 115 that are capable of supporting simultaneous communication via carriers associated with more than one different carrier bandwidths.

[0084] The wireless communication system 100 may support communication with the UE 115 on multiple cells or carriers, a feature that may be referred to as carrier aggregation (CA) or multi-carrier operation. Depending on the carrier aggregation configuration, the UE 115 may be configured with multiple downlink CCs and one or more uplink CCs. Carrier aggregation may be used for both FDD and TDD component carriers.

[0085] In some cases, the wireless communication system 100 can utilize an enhanced component carrier (eCC). An eCC may have one or more characteristics, including a wider carrier or frequency channel bandwidth, a shorter symbol duration, a shorter TTI duration, or a modified control channel configuration. In some cases, an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have suboptimal or non-ideal backhaul links). An eCC may also be configured for use in an unlicensed spectrum or a shared spectrum (e.g., where more than one operator is allowed to use the spectrum). An eCC characterized by a wide carrier bandwidth may include one or more segments that may be employed by a UE 115 that is unable to monitor the entire carrier bandwidth or is otherwise configured to use a limited carrier bandwidth (e.g., to save power).

[0086] In some cases, an eCC may employ a different symbol duration than other CCs, which may include using a shortened symbol duration compared to the symbol duration of other CCs. A shorter symbol duration may be associated with an increased spacing between adjacent subcarriers. A device employing an eCC (e.g., a UE 115 or a base station 105) may transmit a wideband signal (e.g., based on a frequency channel or carrier bandwidth of 20, 40, 60, 80 MHz, etc.) at a shortened symbol duration (e.g., 16.67 microseconds). A TTI in an eCC may consist of one or more symbol periods. In some cases, the TTI duration (i.e., the number of symbol periods in a TTI) may be variable.

[0087] Wireless communication systems such as NR systems can use any combination of licensed, shared, and unlicensed spectrum bands. The flexibility of eCC symbol duration and subcarrier spacing can allow the use of eCCs across multiple spectrums. In some examples, NR shared spectrum can improve spectrum utilization and spectrum efficiency, in particular, through dynamic vertical (e.g., across frequency) and horizontal (e.g., across time) resource sharing.

[0088] In some aspects, the UE 115 may determine that the profile for vehicle-based sidelink communications supports packet duplication using a set of carrier frequencies. The UE 115 may send a request to the base station 105 for resources for performing vehicle-based sidelink communications, the request including an indication of the profile, a reliability metric associated with the profile, and an identifier identifying the set of carrier frequencies. The UE 115 may receive from the base station 105 one or more grants for SPS resources allocated on the set of carrier frequencies in response to the request.

[0089] The base station 105 may receive a request for resources from the UE 115, the request including an indication of a profile for vehicle-based sidelink communications, a reliability metric associated with the profile, and an identifier of a set of carrier frequencies to be used for packet replication during vehicle-based sidelink communications. The base station 105 may send one or more grants to the UE 115 for SPS resources allocated on the set of carrier frequencies in response to the request.

[0090] Figure 2 An example of a wireless communication system 200 that supports network-assisted scheduling for packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown. In some examples, the wireless communication system 200 can implement aspects of the wireless communication system 100. The wireless communication system 200 can include a base station 205, a UE 210, and a UE 215, which can be examples of corresponding devices described herein.

[0091] The wireless communication system 200 may include or support a network for vehicle-based communications, also referred to as a vehicle-to-everything (V2X) network, a vehicle-to-vehicle (V2V) network, and / or a cellular V2X (C-V2X) network. The vehicle-based communication network may provide always-on telematics, where UEs (e.g., vehicle UEs (v-UEs)) transmit directly to the network (e.g., via vehicle-to-network (V2N) communications), to pedestrian UEs (e.g., via vehicle-to-pedestrian (V2P) communications), to infrastructure equipment (vehicle-to-infrastructure (V2I) communications), and to other v-UEs (e.g., via the network and / or directly via V2V communications).

[0092] The wireless communication system 200 may include or support packet replication, such as PDCP PDU repetition. For example, packet replication may be supported for CA-based packet replication. CA may include a base station 205 that aggregates two or more carriers (e.g., CCs) for UE 210 and / or 215, wherein the PDCP PDU is repeated on each carrier. In general, CA-based packet replication using multiple carriers can be used to improve the reliability of V2X packet delivery. For SPS, the base station 205 can create multiple SPS grants in at least two different carriers to enable UE 210 and / or 215 to send the same PDCP PDU using CA packet replication during sidelink communications.

[0093] In general, vehicle-based communications may be network-controlled or autonomous. In a network-controlled environment, base station 205 may schedule one or more resources for UE 210 and / or 215 for vehicle-based communications. In an autonomous environment, resources may be pre-configured for UE 210 and / or 215 for vehicle-based communications.

[0094] In some aspects, the communication between the base station 205 and the UE 210 and / or 215 can be considered as direct communication, while the communication between the UE 210 and 215 can be considered as sidelink communication. In a network-controlled environment (or a network-assisted environment), the base station 205 can provide a grant of resources for a vehicle-based sidelink communication. For example, the base station 205 can provide a sidelink grant for a vehicle-based sidelink communication.

[0095] In some aspects, the wireless communication system 200 may also support SPS scheduling, where multiple SPS grants are provided for two or more carrier frequencies. For example, SPS scheduling may be used for certain traffic patterns, such as periodically occurring data bursts of similar size.

[0096] Aspects of the described technology provide signaling between a base station 205 and a UE 210 (in this example, but can be between the base station 205 and any other UE) that uses a set of carrier frequencies and uses packet replication to support vehicle-based sidelink communications. For example, the UE 210 can identify a service profile for vehicle-based sidelink communications, wherein the service profile supports packet replication (e.g., CA-based packet replication) using a set of carrier frequencies. As an example, a service profile (or simply, a profile) can include a specific type of V2X service, such as the exchange of sensor data, velocity information, location information, etc. In some aspects, the profile can have an associated destination layer 2 identifier (or simply, a destination identifier). In some aspects, the UE 210 can provide an indication to the base station 205 that it intends to use packet replication using a set of carrier frequencies to perform vehicle-based sidelink communications.

[0097] Based on the determination, the UE 210 may send a request to the base station 205 to request resources for performing vehicle-based sidelink communications. Broadly speaking, the request may include or otherwise convey an indication of a profile of a reliability metric associated with the profile (e.g., an indicator of ProSe per packet reliability (PPPR)), and / or may identify or otherwise indicate a set of carrier frequencies. In some aspects, the request may be broken down or otherwise transmitted in multiple messages from the UE 210.

[0098] For example, UE 210 may send a sidelink information (SidelinkUEInformation) message to base station 205, which includes or otherwise provides an indication of a profile and an identifier for a carrier frequency set. The sidelink information message may include a list of each destination identifier (e.g., a destination layer 2 identifier) ​​for the profile, wherein each destination identifier has an associated index value. For each destination identifier, the sidelink information message may include an indication of an allowed carrier frequency set that UE 210 may use for transmission of vehicle-based sidelink communications. The sidelink information message may include or convey an indication that UE 210 desires to use packet replication in a CA configuration to perform vehicle-based sidelink communications.

[0099] For another example, UE 210 can send auxiliary information (UEAssistanceInformation) message to base station 205 to report its traffic profile and indicate that the traffic profile supports SPS scheduling for side link communication. In some aspects, the auxiliary information message may include or otherwise convey the index of the destination identifier previously indicated, for example, for the index of the destination identifier indicated in the side link information message. In some aspects, the auxiliary information message may include or otherwise convey the indication of a reliability metric (e.g., PPPR indicator). In some aspects, the auxiliary information message may be configured to include or otherwise provide an indication of a subset of carrier frequencies from a carrier frequency set, the indication providing an indication of the number of carrier frequencies to be used for packet replication. In some aspects, the auxiliary information message may include or otherwise provide an indication of a traffic mode for a profile, offset information, priority value, etc.

[0100] The base station 205 may receive a request for resources from the UE 210 and determine whether CA-based packet replication is supported, and if so, determine how to support CA-based packet replication. In some aspects, this may include the base station 205 determining whether CA-based packet replication is supported based on a reliability metric associated with each indicated service profile. For example, the base station 205 may identify a threshold value for vehicle-based side link communication and determine whether the reliability metric meets the threshold. If so, the base station 205 may determine to support CA-based packet replication for the UE 210 to perform vehicle-based side link communication. In some aspects, the base station 205 may identify a set of carrier frequencies that the UE 210 will use for packet replication based on the reliability metric that meets the threshold and / or the availability of the side link resources, such as a set of available carrier frequencies that the base station 205 can allocate to the UE 210.

[0101] Assuming that the base station 205 determines to support CA-based packet replication for UE 210, the base station 205 can send one or more authorizations for the SPS resources allocated on the carrier frequency set to the UE 210. In some aspects, the base station 205 can use a corresponding number of downlink control indicators (DCI) to allocate multiple side link authorizations, wherein each DCI indicates the same SPS configuration index to activate the SPS resources for packet replication. In some aspects, the base station 205 can send one or more authorizations in an RRC message, and the RRC message includes or otherwise provides an indication of the SPS configuration and the corresponding SPS index for the carrier frequency set. For example, the SPS configuration can be associated with an authorization that matches the profile of the vehicle-based side link communication.

[0102] Figure 3 An example of a method 300 for supporting network-assisted scheduling of packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown. In some examples, the method 300 may implement aspects of the wireless communication system 100 / 200. Aspects of the method 300 may be implemented by a base station, which may be an example of a corresponding device described herein.

[0103] At 305, the base station may receive a sidelink information message from the UE. In some aspects, the sidelink information message includes or otherwise provides an indication of a traffic profile for vehicle-based sidelink communications that supports packet duplication using a set of carrier frequencies. In some aspects, the sidelink information message includes or otherwise provides an indication of an identifier that identifies the set of carrier frequencies.

[0104] In certain aspects, the UE sends a sidelink information message (SidelinkUEinformation) to the base station to report its intention to send vehicle-based sidelink communications, and the sidelink information message also includes a list of destination layer 2 identifiers. For each destination layer 2 identifier, the UE indicates its allowed set of carrier frequencies for transmission and potential CA operation.

[0105] At 310, the base station may receive an assistance information message from the UE. In some aspects, the assistance information message includes or otherwise communicates an indication of a reliability metric. In some aspects, the assistance information message may include or otherwise communicate an indication of an index value associated with a profile, such as an index to a destination layer 2 identifier indicated in the sidelink information message. In some aspects, the UE may configure the assistance information message to indicate a subset of carrier frequencies from a set of carrier frequencies to indicate a number of carrier frequencies to use for packet duplication.

[0106] In certain aspects, the UE sends an assistance information (UEAssistanceInformation) message to the base station to report the service profile (or simply, profile) in which it can use SPS in vehicle-based sidelink communications. The service profile may include a destination layer 2 identifier index (e.g., corresponding to the destination layer 2 identifier reported in SidelinkUEinformation). In some aspects, the assistance information message may indicate the UE's associated service mode, offset, priority value (e.g., Prose per packet priority (PPPP) indicator), etc. If the UE intends to use CA-based packet duplication, the UE may also report a reliability metric (e.g., PPPR value) associated with the traffic profile. In some aspects, the UE may suggest the number of carriers to be used for packet duplication.

[0107] In some aspects, the sidelink information message and the assistance information message may include a request from the UE for resources for packet duplication during vehicle-based sidelink communications.

[0108] At 315, the base station may determine whether CA packet duplication is supported. In some aspects, the base station may make this determination based on a request received from the UE. In one example, the base station may identify a threshold for vehicle-based settling communications and determine whether packet duplication is supported based on a reliability metric that satisfies the threshold.

[0109] In some aspects, the base station may decide whether and how to support CA packet duplication based on a request message (e.g., a UE assistance information message). In one example, this may include the base station using a PPPR threshold to determine the number of data packets that need to be repeated.

[0110] If the base station decides to allow CA packet duplication, then at 320, the base station may send one or more grants for SPS resources allocated on the carrier frequency set in response to the request. In some aspects, the base station may configure an SPS configuration information element (e.g., RRCConnectionReconfiguration) in a dedicated RRC signaling. In some aspects, the RRC signaling may indicate that its configuration contains an SPS index of multiple CC information, which allows UE packets to be repeated. Those CCs may be selected by the base station to allow packet duplication. In some aspects, the base station may use multiple DCI-5A format signaling to allocate multiple sidelink grants to the UE, wherein each DCI indicates the same SPS configuration index to activate SPS for packet duplication.

[0111] If the base station decides not to allow CA packet duplication, the base station sends one or more grants to the UE allocating SPS resources, but without CA packet duplication, at 325. That is, the base station may allocate SPS resources for the UE to perform vehicle-based sidelink communications, but may not allocate a carrier frequency set for packet duplication.

[0112] Figure 4 An example of a process 400 that supports network-assisted scheduling for packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown. In some examples, the process 400 can implement aspects of the wireless communication system 100 / 200 and / or the method 300. The process 400 can include a UE 405 and a base station 410, which can be examples of corresponding devices described herein.

[0113] At 415, UE 405 may determine that the profile of the vehicle-based sidelink communication supports packet duplication using a set of carrier frequencies. In some aspects, UE 405 may identify a destination identifier (e.g., a destination layer 2 identifier) ​​for the vehicle-based communication. In some aspects, the profile may be based on the destination identifier.

[0114] At 420, the UE 405 may send to the base station 410 (and the base station 410 may receive) a request for resources for performing vehicle-based sidelink communications. In some aspects, the request may include or otherwise provide an indication of a profile, a reliability metric associated with the profile, and an identifier identifying a set of carrier frequencies. In some aspects, the UE 405 may send a signal to the base station 410 indicating the use of the set of carrier frequencies to support packet duplication.

[0115] In some aspects, the UE 405 may send an indication and an identifier of the profile in a sidelink information message. In some aspects, the UE 405 may send an indication of a reliability metric and an index value associated with the profile in an assistance information message. In some examples, the assistance information message may indicate a subset of carrier frequencies in a set of carrier frequencies to provide an indication of the number of carrier frequencies used for packet duplication.

[0116] In some aspects, the base station 410 may determine whether to support a request for packet duplication for vehicle-based sidelink communications for the UE 405. One or more grants may be configured based on the determination. In some examples, the base station 410 may make the determination by identifying a threshold for vehicle-based sidelink communications and then determining whether the reliability metric satisfies the threshold.

[0117] At 425, in response to the request, the base station 410 may send (and the UE 405 may receive) one or more grants for the SPS resources allocated on the set of carrier frequencies. In some aspects, the one or more grants may be transmitted in one or more DCIs from the base station 410. In some aspects, two or more grants may include an indication of the same SPS index.

[0118] In some aspects, base station 410 may configure an RRC message to indicate an SPS configuration associated with a set of carrier frequencies for packet duplication and a corresponding SPS index. In some examples, the SPS configuration may be associated with one or more grants that match a profile for vehicle-based sidelink communications.

[0119] Figure 5 A block diagram 500 of a UE 505 supporting network-assisted scheduling for packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown. The UE 505 may be an example of aspects of the UE 115 as described herein. The UE 505 may include a receiver 510, a communication manager 515, and a transmitter 520. The UE 505 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0120] The receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to network-assisted scheduling for packet replication in vehicle-based sidelink communications, etc.). The information may be passed to other components of the device. The receiver 510 may be a reference Figure 8 Examples of aspects of the transceiver 820 are described. The receiver 510 may employ a single antenna or a collection of antennas.

[0121] The communication manager 515 may be a reference Figure 8 Examples of aspects of the communications manager 810 are described.

[0122] The communication manager 515 and / or at least some of its various subcomponents may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions of at least some of the communication manager 515 and / or its various subcomponents may be performed by a general purpose processor, digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described in the present disclosure. At least some of the communication manager 515 and / or its various subcomponents may be physically located in various locations, including being distributed so that portions of the functions are implemented by one or more physical devices at different physical locations. In some examples, according to various aspects of the present disclosure, at least some of the communication manager 515 and / or its various subcomponents may be separate and distinct components. In other examples, the communications manager 515 and / or at least some of its various subcomponents may be combined with one or more other hardware components, including but not limited to input / output (I / O) components according to various aspects of the present disclosure, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof.

[0123] The communication manager 515 may determine that the profile for the vehicle-based sidelink communication supports packet duplication using the set of carrier frequencies. The communication manager 515 may send a request to the base station for resources for performing the vehicle-based sidelink communication, the request including an indication of the profile, a reliability metric associated with the profile, and an identifier identifying the set of carrier frequencies. The communication manager 515 may receive from the base station one or more grants for SPS resources allocated on the set of carrier frequencies in response to the request.

[0124] The transmitter 520 may transmit signals generated by other components of the device. In some examples, the transmitter 520 may be co-located with the receiver 510 in a transceiver module. For example, the transmitter 520 may be a reference Figure 8 Examples of aspects of the transceiver 820 are described. The transmitter 520 may employ a single antenna or a collection of antennas.

[0125] Figure 6 A block diagram 600 of a UE 605 supporting network-assisted scheduling for packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown. The UE 605 may be an example of a UE 115 as described herein, including, for example, reference Figure 5Aspects of the UE 505 are described. The UE 605 may include a receiver 610, a communication manager 615, and a transmitter 635. The UE 605 may also include a processor. Each of these components may communicate with each other (eg, via one or more buses).

[0126] The receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to network-assisted scheduling for packet replication in vehicle-based sidelink communications, etc.). The information may be passed to other components of the device. The receiver 610 may be a reference Figure 8 Examples of aspects of the transceiver 820 are described. The receiver 610 may employ a single antenna or a collection of antennas.

[0127] The communication manager 615 may be a reference Figure 8 An example of aspects of the communication manager 810 is described. The communication manager 615 may also include a service profile manager 620, a request manager 625, and an authorization manager 630.

[0128] The traffic profile manager 620 may determine that the profile for vehicle-based sidelink communications supports packet duplication using a set of carrier frequencies.

[0129] The request manager 625 may send a request to the base station for resources for performing vehicle-based sidelink communications, the request including an indication of a profile, a reliability metric associated with the profile, and an identifier identifying a set of carrier frequencies.

[0130] Grant manager 630 may receive one or more grants from the base station for SPS resources allocated on the set of carrier frequencies in response to the request.

[0131] The transmitter 635 may transmit signals generated by other components of the device. In some examples, the transmitter 635 may be co-located with the receiver 610 in a transceiver. For example, the transmitter 635 may be a reference Figure 8 Examples of aspects of the transceiver 820 are described. The transmitter 635 may employ a single antenna or a collection of antennas.

[0132] Figure 7 A block diagram 700 of a communication manager 705 supporting network-assisted scheduling for packet replication in vehicle-based sidelink communications is shown according to aspects of the present disclosure. The communication manager 705 may be a reference Figure 5 , Figure 6 and Figure 85 , 615, or 810. The communications manager 705 may include a traffic profile manager 710, a request manager 715, an authorization manager 720, a packet replication manager 725, a sidelink information manager 730, an auxiliary information manager 735, a destination identifier manager 740, and a DCI manager 745. Each of these components may communicate with each other, directly or indirectly (e.g., via one or more buses).

[0133] The traffic profile manager 710 may determine that the profile for communicating on the vehicle-based sidelink supports packet duplication using a set of carrier frequencies.

[0134] The request manager 715 may send a request to the base station for resources for performing vehicle-based sidelink communications, the request including an indication of a profile, a reliability metric associated with the profile, and an identifier identifying a set of carrier frequencies.

[0135] Grant manager 720 may receive one or more grants from the base station for SPS resources allocated on the set of carrier frequencies in response to the request.

[0136] The packet duplication manager 725 may send a signal indicating the use of a set of carrier frequencies to support packet duplication.

[0137] The sidelink information manager 730 may transmit a sidelink information message indicating a profile and an identifier to the base station.

[0138] The assistance information manager 735 may send an assistance information message to the base station to indicate the reliability metric, the assistance information message including an index value associated with the profile. In some examples, the assistance information manager 735 may configure the assistance information message to indicate a subset of carrier frequencies in a set of carrier frequencies to indicate the number of carrier frequencies used for packet duplication.

[0139] The destination identifier manager 740 may identify a destination identifier for a vehicle-based sidelink communication, wherein the profile is based on the destination identifier.

[0140] The DCI manager 745 may receive one or more grants in one or more DCIs from a base station. In some examples, the DCI manager 745 may receive more than one grant containing the same SPS index.

[0141] Figure 8A block diagram of a system 800 according to aspects of the present disclosure is shown, the system 800 including a device 805 supporting network-assisted scheduling for packet duplication in vehicle-based sidelink communications. The device 805 may be an example of a UE 115 as described herein, or include, for example, a device 805 as described herein. Figure 5 and Figure 6 Components of the described UE 505 and UE 605. Device 805 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communications manager 810, an I / O controller 815, a transceiver 820, an antenna 825, a memory 830, and a processor 840. These components may be in electronic communication via one or more buses (e.g., bus 845).

[0142] I / O controller 815 can manage input and output signals for device 805. I / O controller 815 can also manage peripheral devices that are not integrated into device 805. In some cases, I / O controller 815 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 815 can utilize a computer such as a Or other known operating systems such as operating systems. In other cases, I / O controller 815 can represent a modem, keyboard, mouse, touch screen or similar device, or interact with a modem, keyboard, mouse, touch screen or similar device. In some cases, I / O controller 815 can be implemented as part of a processor. In some cases, a user can interact with device 805 via I / O controller 815 or via hardware components controlled by I / O controller 815.

[0143] As described above, the transceiver 820 can communicate bidirectionally via one or more antennas, wired or wireless links. For example, the transceiver 820 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 820 may also include a modem that modulates the packet and provides the modulated packet to the antenna for transmission, and demodulates the packet received from the antenna.

[0144] In some cases, a wireless device may include a single antenna 825. However, in some cases, the device may have more than one antenna 825, which may be capable of sending or receiving multiple wireless transmissions simultaneously.

[0145] The memory 830 may include random access memory (RAM) and read-only memory (ROM). The memory 830 may store computer-readable, computer-executable software 835 including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 830 may contain, among other things, a basic input / output system (BIOS) that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0146] The processor 840 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any combination thereof). In some cases, the processor 840 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 840. The processor 840 may be configured to execute computer-readable instructions stored in the memory to perform various functions (e.g., functions or tasks to support network-assisted scheduling for packet replication in vehicle-based sidelink communications).

[0147] Fig. 9 A block diagram 900 of a base station 905 supporting network-assisted scheduling for packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown. The base station 905 can be an example of aspects of the base station 105 as described herein. The base station 905 can include a receiver 910, a communication manager 915, and a transmitter 920. The base station 905 can also include a processor. Each of these components can communicate with each other (e.g., via one or more buses).

[0148] The receiver 910 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to network-assisted scheduling for packet replication in vehicle-based sidelink communications, etc.). The information may be passed to other components of the device. The receiver 910 may be a reference Fig.12 An example of aspects of the transceiver 1220 is described. The receiver 910 may employ a single antenna or a collection of antennas.

[0149] The communication manager 915 may be a reference Fig.12 Examples of aspects of the communications manager 1210 are described.

[0150] The communication manager 915 and / or at least some of its various subcomponents may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions of at least some of the communication manager 915 and / or its various subcomponents may be performed by a general purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure. The communication manager 915 and / or at least some of its various subcomponents may be physically located in various locations, including being distributed so that portions of the functions are implemented by one or more physical devices at different physical locations. In some examples, according to various aspects of the present disclosure, at least some of the communication manager 915 and / or its various subcomponents may be separate and distinct components. In other examples, the communications manager 915 and / or at least some of its various subcomponents may be combined with one or more other hardware components, including but not limited to input / output (I / O) components according to various aspects of the present disclosure, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof.

[0151] The communication manager 915 may receive a request for resources from a UE, the request including an indication of a profile for vehicle-based sidelink communications, a reliability metric associated with the profile, and an identifier identifying a set of carrier frequencies to be used for packet replication during vehicle-based sidelink communications. The communication manager 915 may send one or more grants to the UE for SPS resources allocated on the set of carrier frequencies in response to the request.

[0152] The transmitter 920 may transmit signals generated by other components of the device. In some examples, the transmitter 920 may be co-located with the receiver 910 in a transceiver. For example, the transmitter 920 may be a reference Fig.12 An example of aspects of a transceiver 1220 is described. Transmitter 920 may employ a single antenna or a collection of antennas.

[0153] Fig.10 A block diagram 1000 of a base station 1005 supporting network-assisted scheduling for packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown. The base station 1005 may be an example of a base station 115 as described herein, or include, for example, a base station 115 as described herein. Fig. 9 An example of aspects of the described base station 905. The base station 1005 may include a receiver 1010, a communication manager 1015, and a transmitter 1030. The base station 1005 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0154] The receiver 1010 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to network-assisted scheduling for packet replication in vehicle-based sidelink communications, etc.). The information may be passed to other components of the device. The receiver 1010 may be a reference Fig.12 An example of aspects of the transceiver 1220 is described. The receiver 1010 may employ a single antenna or a collection of antennas.

[0155] The communication manager 1015 may be a reference Fig.12 Examples of aspects of the communications manager 1210 are described.

[0156] The communications manager 1015 may also include a request manager 1020 and an authorization manager 1025 .

[0157] The request manager 1020 may receive a request for resources from a UE, the request comprising an indication of a profile for vehicle-based sidelink communications, a reliability metric associated with the profile, and an identifier identifying a set of carrier frequencies to be used for packet replication during vehicle-based sidelink communications.

[0158] In response to the request, grant manager 1025 may send one or more grants to the UE for SPS resources allocated on the set of carrier frequencies.

[0159] Transmitter 1030 may transmit signals generated by other components of the device. In some examples, transmitter 1030 may be co-located with receiver 1010 in a transceiver. For example, transmitter 1030 may be a reference Fig.12 An example of aspects of the transceiver 1220 is described. The transmitter 1030 may employ a single antenna or a collection of antennas.

[0160] Fig.11 A block diagram 1100 of a communication manager 1105 is shown that supports network-assisted scheduling for packet replication in vehicle-based sidelink communications according to aspects of the present disclosure. The communication manager 1105 may be a reference Fig. 9 , Fig.10 and Fig.121015, or 1210. The communications manager 1105 may include a request manager 1110, an authorization manager 1115, a packet replication manager 1120, an RRC manager 1125, a sidelink information manager 1130, an auxiliary information manager 1135, a traffic profile manager 1140, and a DCI manager 1145. Each of these components may communicate with each other directly or indirectly (e.g., via one or more buses).

[0161] The request manager 1110 may receive a request for resources from a UE, the request comprising an indication of a profile for vehicle-based sidelink communications, a reliability metric associated with the profile, and an identifier identifying a set of carrier frequencies to be used for packet replication during vehicle-based sidelink communications.

[0162] In response to the request, grant manager 1115 may send one or more grants to the UE for SPS resources allocated on the set of carrier frequencies.

[0163] The packet replication manager 1120 may determine whether packet replication for vehicle-based sidelink communications is supported based on the request, wherein one or more authorizations are configured based on the determination.

[0164] In some examples, the packet duplication manager 1120 may identify a threshold value for vehicle-based sidelink communications, wherein the determination of whether to support packet duplication is based on the reliability metric satisfying the threshold.

[0165] In some examples, packet replication manager 1120 may identify a set of carrier frequencies for packet replication based on at least one of: a reliability metric that satisfies the threshold, or availability of side link resources, or a combination thereof.

[0166] In some examples, packet duplication manager 1120 may receive a signal indicating use of a set of carrier frequencies to support packet duplication.

[0167] The RRC manager 1125 may configure the RRC message to indicate the SPS configuration associated with the carrier frequency set used for the carrier grouping and the corresponding SPS index.

[0168] In some examples, the RRC manager 1125 may, in certain circumstances, associate an SPS configuration with one or more grants that match a profile for vehicle-based sidelink communications.

[0169] The sidelink information manager 1130 may receive a sidelink information message indicating a profile and an identifier from the UE.

[0170] The assistance information manager 1135 may receive an assistance information message indicating a reliability metric from the UE, the assistance information message including an index value associated with the profile.

[0171] In some examples, the assistance information manager 1135 may decode the assistance information message to identify a subset of carrier frequencies in the set of carrier frequencies indicating a number of carrier frequencies used for packet duplication.

[0172] Traffic profile manager 1140 may manage one or more aspects of a profile. In some examples, traffic profile manager 1140 may, in certain circumstances, determine that a profile is based on a destination identifier associated with a vehicle-based sidelink communication.

[0173] The DCI manager 1145 may send one or more grants in one or more DCIs containing the SPS index.

[0174] Fig.12 A block diagram of a system 1200 according to aspects of the present disclosure is shown, the system 1200 including a device 1205 that supports network-assisted scheduling for packet duplication in vehicle-based sidelink communications. The device 1205 may be an example of a base station 105 as described herein, or include, for example, reference Fig. 9 and Fig.10 Aspects of the described base station 905 and base station 1005. Device 1205 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communications manager 1210, a network communications manager 1215, a transceiver 1220, an antenna 1225, a memory 1230, a processor 1240, and an inter-station communications manager 1245. These components may communicate electronically via one or more buses (e.g., bus 1250).

[0175] The network communications manager 1215 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network communications manager 1215 may manage the delivery of data communications for client devices (eg, one or more UEs 115).

[0176] As described above, the transceiver 1220 can communicate bidirectionally via one or more antennas, wired or wireless links. For example, the transceiver 1220 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1220 can also include a modem that modulates the packet and provides the modulated packet to the antenna for transmission, and demodulates the packet received from the antenna.

[0177] In some cases, a wireless device may include a single antenna 1225. However, in some cases, the device may have more than one antenna 1225, which may be capable of sending or receiving multiple wireless transmissions simultaneously.

[0178] The memory 1230 may include RAM and ROM. The memory 1230 may store computer-readable, computer-executable software 1235 including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 1230 may contain, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0179] Processor 1240 may include an intelligent hardware device (e.g., a general purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any combination thereof). In some cases, processor 1240 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into processor 1240. Processor 1240 may be configured to execute computer-readable instructions stored in a memory to perform various functions (e.g., functions or tasks to support network-assisted scheduling for packet replication in vehicle-based sidelink communications).

[0180] The inter-station communication manager 1245 can manage communications with other base stations 105 and can include a controller or scheduler for coordinating with other base stations 105 to control communications with UE 115. For example, the inter-station communication manager 1245 can coordinate scheduling for transmissions to UEs for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communication manager 1245 can provide an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between base stations 105.

[0181] Fig.13 A flow chart depicting a method 1300 for network-assisted scheduling of packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown. The operations of the method 1300 may be implemented by a UE or components thereof as described herein. For example, the operations of the method 1300 may be implemented by a UE or components thereof as described herein. Figures 5 to 8 In some examples, the UE may execute a code set to control the functional elements of the device to perform the functions described below. In addition or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

[0182] At 1305, the UE may determine that the profile for vehicle-based sidelink communication supports packet duplication using a set of carrier frequencies. The operations of 1305 may be performed according to the methods described herein. In some examples, the UE may be configured as described in reference to Figures 5 to 8 Aspects of the operations of 1305 are performed by the described service profile manager.

[0183] At 1310, the UE may send a request to the base station for resources for performing vehicle-based sidelink communications, the request including an indication of a profile, a reliability metric associated with the profile, and an identifier identifying a set of carrier frequencies. The operations of 1310 may be performed according to the methods described herein. In some examples, the request may be performed by, for example, referring to Figures 5 to 8 Aspects of the operations of requesting a manager to perform 1310 are described.

[0184] At 1315, the UE may receive from the base station one or more grants for SPS resources allocated on the set of carrier frequencies in response to the request. The operations of 1315 may be performed according to the methods described herein. In some examples, the UE may be configured as described in reference to Figures 5 to 8 Aspects of the operations of 1315 are performed by the authorization manager as described.

[0185] Fig.14 A flow chart depicting a method 1400 for network-assisted scheduling of packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown. The operations of the method 1400 may be implemented by a UE or components thereof as described herein. For example, the operations of the method 1400 may be implemented by a UE or components thereof as described herein. Figures 5 to 8 In some examples, the UE may execute a code set to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

[0186] At 1405, the UE may determine that the profile for vehicle-based sidelink communication supports packet duplication using a set of carrier frequencies. The operations of 1405 may be performed according to the methods described herein. In some examples, the UE may be configured as described in reference to Figures 5 to 8 Aspects of the operations of 1405 are performed by the described service profile manager.

[0187] At 1410, the UE may identify a destination identifier for vehicle-based sidelink communications, wherein the profile is based on the destination identifier. The operations of 1410 may be performed according to the methods described herein. In some examples, the UE may be configured as described in reference to Figures 5 to 8 The destination identifier manager is described to perform aspects of operation 1410.

[0188] At 1415, the UE may send a request to the base station for resources for performing vehicle-based sidelink communications, the request including an indication of a profile, a reliability metric associated with the profile, and an identifier identifying a set of carrier frequencies. The operations of 1415 may be performed according to the methods described herein. In some examples, the request may be performed by, for example, referring to Figures 5 to 8 The described request manager performs aspects of operation 1415 .

[0189] At 1420, the UE may receive from the base station one or more grants for SPS resources allocated on the set of carrier frequencies in response to the request. The operations of 1420 may be performed according to the methods described herein. In some examples, the UE may be configured as described in reference to Figures 5 to 8 Aspects of the operations of 1420 are performed by the authorization manager as described.

[0190] Fig.15 A flow chart depicting a method 1500 for network-assisted scheduling of packet duplication in vehicle-based sidelink communications according to aspects of the present disclosure is shown. The operations of the method 1500 may be implemented by a base station or components thereof as described herein. For example, the operations of the method 1500 may be implemented by a base station or components thereof as described herein. Figures 9 to 12 In some examples, the base station may execute a code set to control functional elements of the device to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the functions described below.

[0191] At 1505, the base station may receive a request for resources from the UE, the request including an indication of a profile for vehicle-based sidelink communications, a reliability metric associated with the profile, and an identifier identifying a set of carrier frequencies to be used for packet replication during vehicle-based sidelink communications. The operations of 1505 may be performed according to the methods described herein. In some examples, the request may be performed by, for example, referring to Figures 9 to 12 Aspects of the operations of requesting a manager to perform 1505 are described.

[0192] At 1510, the base station may send one or more grants for SPS resources allocated on the set of carrier frequencies to the UE in response to the request. The operations of 1510 may be performed according to the methods described herein. In some examples, the base station may send one or more grants for SPS resources allocated on the set of carrier frequencies to the UE in response to the request. Figures 9 to 12 Aspects of the operations of 1510 are performed by the authorization manager as described.

[0193] It should be noted that the methods described above describe possible implementations, and that operations and steps may be rearranged or otherwise modified, and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0194] The technology described herein can be used in various wireless communication systems, for example, code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA) and other systems. CDMA systems can implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA). CDMA2000 covers IS-2000, IS-95 and IS-856 standards. IS-2000 versions are commonly referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. TDMA systems can implement radio technologies such as Global System for Mobile Communications (GSM).

[0195] OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), E-UTRA, Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS). LTE, LTE-A, and LTE-A Pro are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The technology described herein can be used for the systems and radio technologies mentioned above as well as other systems and radio technologies. Although aspects of LTE, LTE-A, LTE-APro, or NR systems may be described for example purposes, and LTE, LTE-A, LTE-APro, or NR terminology may be used in many descriptions, the techniques described herein may be applicable beyond LTE, LTE-A, LTE-APro, or NR applications.

[0196] A macro cell typically covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access to a UE 115 with a service subscription to a network provider. Small cells may be associated with a base station 105 with lower power than a macro cell, and small cells may operate in the same or different (e.g., licensed, unlicensed, etc.) frequency bands as the macro cell. According to various examples, small cells may include pico cells, femto cells, and micro cells. A pico cell, for example, may cover a small geographic area and may allow unrestricted access to a UE 115 with a service subscription to a network provider. A femto cell may also cover a small geographic area (e.g., a home) and may provide restricted access by a UE 115 with an association to a femto cell (e.g., a UE 115 in a closed subscriber group (CSG), a UE 115 for a user in a home, etc.). An eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB. An eNB may support one or more (eg, two, three, four, etc.) cells and may also support communication using one or more component carriers.

[0197] One or more wireless communication systems 100 described herein may support synchronous or asynchronous operation. For synchronous operation, the base stations 105 may have similar frame timing, and transmissions from different base stations 105 may be approximately aligned in time. For asynchronous operation, the base stations 105 may have different frame timing, and transmissions from different base stations 105 may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operation.

[0198] 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 above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0199] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or executed with a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, microcontroller, or state machine. The 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).

[0200] The functions described herein may be implemented by hardware, software executed by a processor, firmware, or any combination thereof. If implemented by software executed by a processor, the functions may be stored on a computer-readable medium or sent via a computer-readable medium as one or more instructions or codes. Other examples and implementations fall within the scope of the present 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 processor, hardware, firmware, hard wiring, or any combination of these. Features that implement the functions may also be physically located in various locations, including portions that are distributed so that the functions are implemented at different physical locations.

[0201] Computer readable medium includes non-transitory computer storage medium and communication medium, and the communication medium includes any medium that helps to transfer a computer program from one place to another place.Non-transitory storage medium can be any available medium that can be accessed by a general or special computer.Example and not limitation, non-transitory computer readable medium can include RAM, ROM, electrically erasable programmable read-only memory (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, disk storage or other magnetic storage device, or can be used for carrying or storing any other non-transitory medium with instruction or data structure form and can be accessed by a general or special computer or a general or special processor.Moreover, any connection is appropriately referred to as computer readable medium.For example, if software is sent from a website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technology (such as infrared, radio and microwave), coaxial cable, fiber optic cable, twisted pair, DSL or wireless technology (such as infrared, radio and microwave) are included in the definition of medium. Disk and disc as used herein include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein disks usually reproduce data magnetically, while discs reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media.

[0202] As used herein, including in the claims, "or" used in a list of items (e.g., a list of items beginning with a phrase such as "at least one" or "one or more") refers to an inclusive list, for example, a list of at least one of A, B, or C refers to A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Likewise, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an exemplary step described as "based on condition A" can be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0203] In the accompanying drawings, similar components or features may have the same reference number. In addition, various components of the same type may be distinguished by following the reference number with a dash and a second reference number that distinguishes the similar components. If only the first reference number is used in this application document, the specification is applicable to any similar component having the same first reference number, regardless of the second or other subsequent reference numbers.

[0204] The description set forth herein, in conjunction with the accompanying drawings, describes exemplary configurations and does not represent all examples that may be implemented or within the scope of the claims. The term "example" as used herein means "used as an example, instance, or illustration," rather than "preferred" or "better than other examples." In order to provide an understanding of the described techniques, the detailed description includes specific details. However, these techniques may be implemented without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0205] The description herein is provided to enable those skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be clear 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. Therefore, the present disclosure is not limited to the examples and designs described herein, but should be given the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment (UE), comprising: determining that a profile for vehicle-based sidelink communications supports packet duplication using a set of carrier frequencies; sending a first message to a base station, the first message comprising a request for resources for performing the vehicle-based sidelink communication, the request comprising an indication of the profile, a traffic mode of the profile for the vehicle-based sidelink communication, and an identifier identifying a subset of carrier frequencies in the set of carrier frequencies for the packet duplication; sending, in response to the first message, a second message including a reliability metric associated with the profile for the vehicle-based sidelink communication, wherein the reliability metric includes a ProSe per-packet reliability (PPPR) indicator, and the packet replication for the vehicle-based sidelink communication is supported based at least in part on the reliability metric satisfying a threshold value; and One or more grants for semi-persistent scheduling (SPS) resources allocated on the set of carrier frequencies in response to the request are received from the base station in one or more downlink control indicators (DCIs) including SPS indexes, wherein the one or more DCIs have DCI format 5A.

2. The method according to claim 1, further comprising: A signal is sent indicating use of the set of carrier frequencies to support packet duplication.

3. The method according to claim 1, wherein: The first message comprises a sidelink information message.

4. The method according to claim 1, wherein: The second message comprises an assistance information message including an index value associated with the profile.

5. The method according to claim 4, further comprising: The assistance information message is configured to indicate a subset of carrier frequencies in the set of carrier frequencies to indicate a number of carrier frequencies used for packet duplication.

6. The method according to claim 1, further comprising: A destination identifier is identified for the vehicle-based sidelink communication, wherein the profile is based at least in part on the destination identifier.

7. The method according to claim 1, wherein: The one or more DCIs include the same SPS index.

8. A method for wireless communication at a base station, comprising: receiving a first message from a user equipment (UE), the first message comprising a request for resources, the request comprising an indication of a profile for vehicle-based sidelink communications, a traffic mode for the profile for the vehicle-based sidelink communications, and an identifier identifying a subset of carrier frequencies in a set of carrier frequencies for packet duplication; receiving, in response to the first message, a second message including a reliability metric associated with the profile for the vehicle-based sidelink communication, wherein the reliability metric includes a ProSe per-packet reliability (PPPR) indicator; determining whether to support the packet duplication for the vehicle-based sidelink communication based at least in part on the reliability metric satisfying a threshold; and In response to the request, one or more grants for semi-persistent scheduling (SPS) resources allocated on the carrier frequency set are sent to the UE in one or more downlink control indicators (DCIs) including SPS indexes, wherein the one or more DCIs have DCI format 5A.

9. The method according to claim 8, wherein: The one or more authorizations are configured based at least in part on the determination.

10. The method according to claim 8, further comprising: The set of carrier frequencies for packet duplication is identified based at least in part on at least one of: the reliability metric satisfying the threshold, or availability of sidelink resources, or a combination thereof.

11. The method according to claim 8, wherein: Sending the one or more authorizations includes: A radio resource control (RRC) message is configured to indicate an SPS configuration and a corresponding SPS index associated with the set of carrier frequencies used for packet duplication.

12. The method according to claim 11, wherein: The SPS configuration is associated with one or more authorizations that match the profile for the vehicle-based sidelink communication.

13. The method according to claim 8, further comprising: A signal is received indicating use of the set of carrier frequencies to support packet duplication.

14. The method according to claim 8, wherein: The first message includes a sidelink information message from the UE indicating the profile and the identifier.

15. The method according to claim 8, wherein: The second message includes an assistance information message from the UE indicating the reliability metric, the assistance information message including an index value associated with the profile.

16. The method according to claim 15, further comprising: The assistance information message is decoded to identify a subset of carrier frequencies in the set of carrier frequencies, the subset of carrier frequencies indicating a number of carrier frequencies used for packet duplication.

17. The method according to claim 8, wherein: The profile is based at least in part on a destination identifier associated with the vehicle-based sidelink communication.

18. The method according to claim 8, wherein: The one or more DCIs include the same SPS index.

19. An apparatus for wireless communication, comprising: processor; a memory in electronic communication with the processor; as well as Instructions stored in the memory and executable by the processor cause the processor to: determining that a profile for vehicle-based sidelink communications supports packet duplication using a set of carrier frequencies; sending a first message to a base station, the first message comprising a request for resources for performing the vehicle-based sidelink communication, the request comprising an indication of the profile, a traffic mode of the profile for the vehicle-based sidelink communication, and an identifier identifying a subset of carrier frequencies in the set of carrier frequencies for the packet duplication; sending, in response to the first message, a second message including a reliability metric associated with the profile for the vehicle-based sidelink communication, wherein the reliability metric includes a ProSe per-packet reliability (PPPR) indicator, and the packet replication for the vehicle-based sidelink communication is supported based at least in part on the reliability metric satisfying a threshold value; and One or more grants for semi-persistent scheduling (SPS) resources allocated on the set of carrier frequencies in response to the request are received from the base station in one or more downlink control indicators (DCIs) including SPS indexes, wherein the one or more DCIs have DCI format 5A.

20. The device according to claim 19, wherein The instructions may also be executed by the processor to cause the processor to perform the following operations: A signal is sent indicating use of the set of carrier frequencies to support packet duplication.

21. The device according to claim 19, wherein The first message comprises a sidelink information message to the base station to indicate the profile and the identifier.

22. The device according to claim 19, wherein The second message comprises an assistance information message to the base station to indicate the reliability metric, the assistance information message comprising an index value associated with the profile.

23. The device according to claim 19, wherein: The one or more DCIs include the same SPS index.

24. An apparatus for wireless communication, comprising: processor; a memory in electronic communication with the processor; as well as Instructions stored in the memory and executable by the processor cause the processor to: receiving a first message from a user equipment (UE), the first message comprising a request for resources, the request comprising: an indication of a profile for vehicle-based sidelink communications, a traffic mode for the profile for the vehicle-based sidelink communications, and an identifier identifying a subset of carrier frequencies in a set of carrier frequencies for packet duplication; receiving, in response to the first message, a second message including a reliability metric associated with the profile for the vehicle-based sidelink communication, wherein the reliability metric includes a ProSe per-packet reliability (PPPR) indicator; determining whether to support the packet duplication for the vehicle-based sidelink communication based at least in part on the reliability metric satisfying a threshold; and In response to the request, one or more grants for semi-persistent scheduling (SPS) resources allocated on the carrier frequency set are sent to the UE in one or more downlink control indicators (DCIs) including SPS indexes, wherein the one or more DCIs have DCI format 5A.

25. The device according to claim 24, wherein: The instructions may also be executed by the processor to cause the processor to perform the following operations: A determination is made based at least in part on the request whether packet duplication is supported for the vehicle-based sidelink communication, wherein the one or more grants are configured based at least in part on the determination.

26. The device according to claim 24, wherein: The instructions for sending the one or more grants are executable by the processor to cause the processor to: A radio resource control (RRC) message is configured to indicate an SPS configuration and a corresponding SPS index associated with the set of carrier frequencies used for packet duplication.

27. The device according to claim 24, wherein: The first message includes a sidelink information message from the UE indicating the profile and the identifier.

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