Techniques for resource selection in wireless communication systems

Abstract

In one aspect, the present disclosure includes methods, apparatus, and computer-readable media for wireless communications for performing the following operations: receiving, by a first user equipment (UE), one or more reserved resources associated with any of the one or more second UEs via a control channel; determining, by the first UE, one or more transmission resources to be reserved based on the one or more reserved resources in time; and transmitting, by the first UE, data to the one or more second UEs using the one or more reserved transmission resources.

Description

[0001] Cross-reference to related application(s)

[0002] This application claims the benefit of U.S. non-provisional application No. 17 / 124,335, filed on December 16, 2020, entitled “TECHNIQUES FOR RESOURCE SELECTION IN A WIRELESS COMMUNICATION SYSTEM,” and U.S. provisional application No. 62 / 951,644, filed on December 20, 2019, entitled “TECHNIQUES FOR RESOURCE SELECTION IN A WIRELESS COMMUNICATION SYSTEM,” both of which are assigned to the assignee of this application and are hereby expressly incorporated herein by reference.

[0003] background

[0004] The present disclosure relates generally to communication systems, and more particularly to improved resource selection for semi-persistent scheduling (SPS) in fifth generation new radio (5G NR) vehicle-to-everything (V2X) communications.

[0005] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include 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 time division synchronous code division multiple access (TD-SCDMA).

[0006] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, and even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of the continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)) and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There is a need for further improvements to 5G NR technology. These improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies.

[0007] As the demand for wireless communications continues to grow, it is desirable to improve the efficiency of wireless communication network technologies.

[0008] Overview

[0009] The following is a brief summary of one or more aspects to provide a basic understanding of such aspects. This summary is not an exhaustive overview of all conceivable aspects and is neither intended to identify key or critical elements of all aspects nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

[0010] An example implementation includes a wireless communication method, the method comprising: receiving, by a first user equipment (UE), one or more reserved resources in time associated with any of the one or more second UEs from the one or more second UEs via a control channel; determining, by the first UE, one or more transmission resources to be reserved based on the one or more reserved resources in time; and transmitting, by the first UE, data to the one or more second UEs using the one or more reserved transmission resources.

[0011] In a further example, an apparatus for wireless communication is provided, the apparatus comprising a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to: receive, by a first UE, one or more reserved resources associated with any of the one or more second UEs over time from one or more second UEs via a control channel; determine, by the first UE, one or more transmission resources to be reserved based on the one or more reserved resources over time; and transmit, by the first UE, data to the one or more second UEs using the one or more reserved transmission resources.

[0012] On the other hand, an apparatus for wireless communication is provided, comprising: a device for receiving, by a first UE, one or more reserved resources in time associated with any one of the one or more second UEs from one or more second UEs via a control channel; a device for determining, by the first UE, one or more transmission resources to be reserved based on the one or more reserved resources in time; and a device for transmitting data to the one or more second UEs using the one or more reserved transmission resources.

[0013] On the other hand, a non-transitory computer-readable medium is provided, comprising code executable by one or more processors to: receive, by a first UE, one or more reserved resources in time associated with any one of the one or more second UEs from one or more second UEs via a control channel; determine, by the first UE, one or more transmission resources to be reserved based on the one or more reserved resources in time; and transmit data to the one or more second UEs using the one or more reserved transmission resources.

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

[0016] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0017] Figure 2A 、 2B , 2C, and 2D are diagrams illustrating examples of a first 5G / NR frame, a DL channel within a 5G / NR subframe, a second 5G / NR frame, and a UL channel within a 5G / NR subframe, respectively.

[0018] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0019] Figure 4 is a flow chart of a method of wireless communication, and more particularly, a flow chart of a method of reserving resources for V2X communication.

[0020] Figure 5 is a block diagram illustrating an example of a UE according to various aspects of the present disclosure.

[0021] Figure 6is a block diagram illustrating an example of a base station in accordance with various aspects of the present disclosure.

[0022] Detailed description

[0023] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. This detailed description includes specific details to provide a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid overstating such concepts.

[0024] Several aspects of telecommunications systems will now be presented with reference to various apparatus and methods. These apparatus and methods are described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively, "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0025] As an example, an element, or any part of an element, or any combination of elements can be implemented as a "processing system" comprising one or more processors. Examples of processors include: a microprocessor, a microcontroller, a graphics processing unit (GPU), a central processing unit (CPU), an application processor, a digital signal processor (DSP), a reduced instruction set computing (RISC) processor, a system on a chip (SoC), a baseband processor, a field programmable gate array (FPGA), a programmable logic device (PLD), a state machine, a gating logic, a discrete hardware circuit, and other suitable hardware configured to perform the various functionalities described throughout this disclosure. One or more processors in a processing system can execute software. Software can be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether it is described in software, firmware, middleware, microcode, hardware description language, or other terms.

[0026] Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, each function may be stored or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. Storage media may be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, a combination of the aforementioned types of computer-readable media, or any other medium that can be used to store instructions or data structures in the form of computer-executable code that can be accessed by a computer.

[0027] Figure 1 The present invention is a diagram illustrating an example of a wireless communication system and access network 100 configured for improved resource selection for semi-persistent scheduling (SPS) in fifth generation new radio (5G NR) vehicle-to-everything (V2X) communication. The wireless communication system (also known as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)).

[0028] In certain aspects, the UE 104 can be configured to operate the communication component 198 and / or the configuration component 240 to receive one or more reserved resources in time associated with any of the one or more second UEs from the one or more second UEs via a control channel. For example, the communication component 198 and / or the configuration component 240 can be configured to determine one or more transmission resources to reserve based on the one or more reserved resources in time, and transmit data to the one or more second UEs using the one or more reserved transmission resources.

[0029] Accordingly, in certain aspects, network entity 102 (e.g., a base station) and / or another UE (such as UE 104) may be configured to operate communicating component 199 and / or configuring component 241 to engage in sidelink communications with UE 104. For example, communicating component 199 and / or configuring component 241 may transmit one or more reserved resources in time to UE 104 and receive one or more transmissions from UE 104 on the one or more reserved transmission resources.

[0030] Base stations 102 may include macro cells (high-power cellular base stations) and / or small cells (low-power cellular base stations). Macro cells include base stations. Small cells include femto cells, pico cells, and micro cells.

[0031] Base stations 102 configured for 4G LTE (collectively referred to as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with EPC 160 via a backhaul link 132 (e.g., an S1 interface). Base stations 102 configured for 5G NR (collectively referred to as the Next Generation RAN (NG-RAN)) may interface with core network 190 via a backhaul link 184. Among other functions, base stations 102 may perform one or more of the following functions: delivery of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment tracking, RAN information management (RIM), paging, positioning, and delivery of alert messages. Base stations 102 may communicate with each other via backhaul links 134 (eg, an X2 interface), directly or indirectly (eg, through EPC 160 or core network 190). Backhaul links 132, 134, and 184 may be wired or wireless.

[0032] Base stations 102 can communicate wirelessly with UEs 104. Each base station 102 can provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102′ can have a coverage area 110′ that overlaps with the coverage area 110 of one or more macro base stations 102. A network that includes both small cells and macro cells can be referred to as a heterogeneous network. A heterogeneous network can also include a home evolved Node B (eNB) (HeNB), which can provide service to a restricted group known as a closed subscriber group (CSG). The communication link 120 between the base station 102 and the UE 104 can include uplink (UL) (also known as reverse link) transmissions from the UE 104 to the base station 102 and / or downlink (DL) (also known as forward link) transmissions from the base station 102 to the UE 104. The communication link 120 can utilize multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. These communication links may be over one or more carriers. For each carrier allocated in the carrier aggregation for a total of up to Yx MHz (x component carriers) for transmission in each direction, the base station 102 / UE 104 may use spectrum with a bandwidth of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.). These carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated to DL compared to UL). The component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell), and the secondary component carriers may be referred to as secondary cells (SCells).

[0033] Some UEs 104 may communicate with each other using device-to-device (D2D) communication links 158. The D2D communication links 158 may use DL / UL WWAN spectrum. The D2D communication links 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). D2D communication may be accomplished through various wireless D2D communication systems, such as, for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0034] The wireless communication system may further include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 in the 5 GHz unlicensed spectrum via a communication link 154. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) to determine whether the channel is available before communicating.

[0035] Small cell 102′ may operate in licensed and / or unlicensed spectrum. When operating in unlicensed spectrum, small cell 102′ may employ NR and use the same 5 GHz unlicensed spectrum as used by Wi-Fi AP 150. Small cell 102′ employing NR in the unlicensed spectrum may improve access network coverage and / or increase access network capacity.

[0036] Whether a small cell 102′ or a large cell (e.g., a macro base station), base station 102 may include an eNB, a gNode B (gNB), or another type of base station. Some base stations, such as gNB 180, may operate in the traditional sub-6 GHz spectrum, millimeter wave (mmW) frequencies, and / or near-mmW frequencies to communicate with UE 104. When gNB 180 operates in mmW or near-mmW frequencies, gNB 180 may be referred to as a mmW base station. Extremely high frequency (EHF) is a portion of the RF spectrum in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 mm and 10 mm. Radio waves in this band may be referred to as millimeter waves. Near-mmW extends down to 3 GHz frequencies with a wavelength of 100 mm. Super high frequency (SHF) bands extend between 3 GHz and 30 GHz and are also referred to as centimeter waves. Communications using mmW / near-mmW radio frequency bands (e.g., 3 GHz–300 GHz) have extremely high path loss and short range. The mmW base station 180 may utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short range.

[0037] Base station 180 may transmit beamformed signals in one or more transmit directions 182′ to UE 104. UE 104 may receive beamformed signals from base station 180 in one or more receive directions 182″. UE 104 may also transmit beamformed signals to base station 180 in one or more transmit directions. Base station 180 may receive beamformed signals from UE 104 in one or more receive directions. Base station 180 / UE 104 may perform beam training to determine the best receive direction and transmit direction for each of base station 180 / UE 104. The transmit direction and receive direction of base station 180 may be the same or different. The transmit direction and receive direction of UE 104 may be the same or different.

[0038] EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. MME 162 may be in communication with a Home Subscriber Server (HSS) 174. MME 162 is a control node that handles signaling between UE 104 and EPC 160. Generally speaking, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are passed through Serving Gateway 166, which itself is connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation and other functions. PDN Gateway 172 and BM-SC 170 are connected to IP Services 176. IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), PS streaming services, and / or other IP services. The BM-SC 170 provides functionality for provisioning and delivering MBMS user services. The BM-SC 170 serves as the entry point for content providers' MBMS transmissions, authorizes and initiates MBMS bearer services within the Public Land Mobile Network (PLMN), and schedules MBMS transmissions. The MBMS Gateway 168 distributes MBMS traffic to base stations 102 within the Multicast Broadcast Single Frequency Network (MBSFN) area that broadcasts specific services. It is also responsible for session management (start / stop) and collecting eMBMS-related charging information.

[0039] The core network 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. The AMF 192 may be in communication with a unified data management (UDM) 196. The AMF 192 is a control node that handles signaling between the UE 104 and the core network 190. Generally speaking, the AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are passed through the UPF 195. The UPF 195 provides UE IP address allocation and other functions. The UPF 195 is connected to the IP services 197. The IP services 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), PS streaming services, and / or other IP services.

[0040] A base station may also be referred to as a gNB, a NodeB, an evolved NodeB (eNB), an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmit reception point (TRP), or some other suitable terminology. Base station 102 provides an access point for UE 104 to EPC 160 or core network 190. Examples of UE 104 include a cellular phone, a smartphone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a tablet device, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, or any other similarly functional device. Some UEs 104 may be referred to as IoT devices (e.g., a parking meter, a gas pump, an oven, a vehicle, a heart monitor, etc.). UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

[0041] Figures 2A-2D Included are diagrams of example frame structures and resources that may be utilized in communications between base station 102, UE 104, and / or secondary UE (or sidelink UE) 110 as described in the present disclosure. Figure 2A FIG200 is a diagram illustrating an example of a first subframe within a 5G / NR frame structure. Figure 2B is a diagram 230 illustrating an example of DL channels within a 5G / NR subframe. Figure 2C FIG250 is a diagram illustrating an example of a second subframe within a 5G / NR frame structure. Figure 2D 280 is a diagram illustrating an example of UL channels within a 5G / NR subframe. The 5G / NR frame structure can be FDD, where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to either DL or UL; or TDD, where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to both DL and UL. Figure 2A 、 2CIn the example provided, the 5G / NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (mostly DL) and subframe 3 is configured with slot format 34 (mostly UL), where D is DL, U is UL, and X is for flexible use between DL / UL. Although subframes 3 and 4 are shown as having slot formats 34 and 28, respectively, any particular subframe can be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are full DL and full UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible codewords. The UE is configured with the slot format (dynamically configured through DL control information (DCI) or semi-statically / statically configured through radio resource control (RRC) signaling) via the received slot format indicator (SFI). Note that the following description also applies to the 5G / NR frame structure for TDD.

[0042] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 equally sized subframes (1ms). Each subframe may include one or more time slots. A subframe may also include mini-slots, which may include 7, 4, or 2 symbols. Each time slot may include 7 or 14 symbols, depending on the time slot configuration. For time slot configuration 0, each time slot may include 14 symbols, while for time slot configuration 1, each time slot may include 7 symbols. The symbols on the DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power-limited scenarios; limited to single stream transmission). The number of time slots within a subframe is based on the time slot configuration and parameter design. For slot configuration 0, different parameter designs μ of 0 to 5 allow 1, 2, 4, 8, 16, and 32 slots per subframe, respectively. For slot configuration 1, different parameter designs 0 to 2 allow 2, 4, and 8 slots per subframe, respectively. Accordingly, for slot configuration 0 and parameter design μ, there are 14 symbols per slot and 2 per subframe. μ time slots. The subcarrier spacing and symbol length / duration vary depending on the parameter design. The subcarrier spacing can be equal to 2^μ*15kHz, where μ is a parameter design 0 to 5. Thus, parameter design μ=0 has a subcarrier spacing of 15kHz, while parameter design μ=5 has a subcarrier spacing of 480kHz. The symbol length / duration is inversely related to the subcarrier spacing. Figures 2A-2D An example is provided for slot configuration 0 with 14 symbols per slot and parameter design μ=0 with 1 slot per subframe. The subcarrier spacing is 15 kHz and the symbol duration is approximately 66.7 μs.

[0043] A resource grid can be used to represent the frame structure. Each slot includes a resource block (RB) (also called a physical RB (PRB)) that extends over 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0044] like Figure 2A As illustrated in

[15] , some REs carry reference (pilot) signals (RS) for the UE. The RSs may include a demodulation RS (DM-RS) (indicated as Rx for one specific configuration, where 100x is the port number, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RSs may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0045] Figure 2B An example of various DL channels within a subframe of a frame is illustrated. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs), each CCE comprising 9 RE groups (REGs), each REG comprising 4 consecutive REs in an OFDM symbol. The primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of a frame. The PSS is used by the UE 104 to determine subframe / symbol timing and the physical layer identity. The secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the aforementioned DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block. The MIB provides the number of RBs in the system bandwidth, as well as the system frame number (SFN). The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH (such as System Information Blocks (SIBs)), and paging messages.

[0046] As in Figure 2CAs illustrated in FIG, some REs carry DM-RSs for channel estimation at the base station (indicated as R for one specific configuration, but other DM-RS configurations are possible). The UE may transmit DM-RSs for the physical uplink control channel (PUCCH) and DM-RSs for the physical uplink shared channel (PUSCH). The PUSCH DM-RSs may be transmitted in the first or first two symbols of the PUSCH. The PUCCH DM-RSs may be transmitted in different configurations depending on whether a short PUCCH or a long PUCCH is transmitted and on the specific PUCCH format used. Although not shown, the UE may transmit a sounding reference signal (SRS). The SRS may be used by the base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

[0047] Figure 2D Examples of various UL channels within a subframe of a frame are illustrated. The PUCCH may be located as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), and HARQ ACK / NACK feedback. The PUSCH carries data and may additionally be used to carry buffer status reports (BSRs), power headroom reports (PHRs), and / or UCI.

[0048] Figure 33 is a block diagram of a base station 310 in communication with a UE 350 in an access network, where the base station 310 may be an example implementation of the base station 102, and where the UE 350 may be an example implementation of the UE 104. In the DL, IP packets from the EPC 160 may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with delivery of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0049] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, including the physical (PHY) layer, may include error detection on the transport channel, forward error correction (FEC) encoding / decoding of the transport channel, interleaving, rate matching, mapping onto the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time and / or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time-domain OFDM symbol stream. The OFDM stream is spatially precoded to generate multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation schemes and for spatial processing. The channel estimates may be derived from a reference signal and / or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0050] At the UE 350, each receiver 354RX receives a signal via its corresponding antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 may perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they may be combined by the RX processor 356 into a single OFDM symbol stream. The RX processor 356 then converts the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, as well as the reference signal, are recovered and demodulated by determining the signal constellation point most likely transmitted by the base station 310. These soft decisions may be based on channel estimates calculated by the channel estimator 358. These soft decisions are then decoded and deinterleaved to recover the data and control signals originally transmitted on the physical channel by the base station 310. These data and control signals are then provided to the controller / processor 359, which implements layer 3 and layer 2 functionality.

[0051] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport and logical channels, packet reassembly, cipher decoding, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0052] Similar to the functionality described in conjunction with DL transmissions performed by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression and security (ciphering, deciphering, integrity protection, integrity verification); RLC layer functionality associated with delivery of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing MAC SDUs onto TBs, demultiplexing MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0053] Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by a TX processor 368 to select the appropriate coding and modulation scheme, and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0054] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318RX receives a signal through its respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to an RX processor 370.

[0055] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport and logical channels, packet reassembly, cipher decoding, header decompression, and control signal processing to recover IP packets from the UE 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0056] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 The communication component 198 combines various aspects.

[0057] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform operations related to Figure 1 The communication component 199 combines various aspects.

[0058] Reference Figure 4-6 , the described features generally relate to improved resource selection for semi-persistent scheduling (SPS) in fifth generation new radio (5G NR) vehicle-to-everything (V2X) systems. For example, in the 3GPP Release 14 specification, in SPS mode, a UE may select a resource at time m and reserve resources with periodicity p. Accordingly, the UE may use resources m, m+p, m+2p, etc., until the UE decides to reselect. Currently, Release 14 requires that if another UE (e.g., a second UE) transmits at a resource at time n with periodicity q, the first UE needs to assume that all resources at n, n+q, n+2q, etc. are reserved. Therefore, the first UE is restricted from selecting any resources that overlap with those of the second UE to prevent collisions and / or interference. In some instances, if p and q are different, a large number of potential resources may be excluded from being reserved for use. In another instance, if p and q are coprime, all potential resources are excluded from being reserved.

[0059] In 5G NR, a UE may be configured for V2X communications, such as sidelink communications with another UE. For example, a UE may be configured by a higher layer with one or more sidelink resource pools. A sidelink resource pool may be used for transmission of a physical sidelink shared channel (PSSCH), or for reception of a PSSCH. Each PSSCH transmission is associated with a physical sidelink control channel (PSCCH) transmission. The PSCCH transmission carries a first stage of sidelink control information (SCI) associated with the PSSCH transmission and a second stage of the associated SCI is carried within the resources of the PSSCH. If a UE transmits SCI format 0-1 on the PSCCH according to the PSCCH resource configuration in slot n and PSCCH resource m, then for the associated PSSCH transmission in the same slot, one transport block is transmitted with at most two layers.

[0060] In one aspect, the UE may transmit the PSSCH in the same time slot as the associated PSCCH. The minimum resource allocation unit in the time domain is the time slot. The UE may transmit the PSSCH in consecutive codewords within the time slot, subject to the following constraints: the UE may not transmit the PSSCH in codewords that are not configured for the sidelink. Codewords are configured for the sidelink according to higher layer parameters startSLsymbols and lengthSLsymbols, where startSLsymbols is the codeword index of the first codeword of lengthSLsymbols consecutive codewords configured for the sidelink; within the time slot, the PSSCH resource allocation starts at codeword startSLsymbols+1; if PSFCH is configured in the time slot, the UE may not transmit the PSSCH in the codeword configured for use by the PSFCH; the UE may not transmit the PSSCH in the last codeword configured for use by the sidelink; and if PSFCH is configured in the time slot, the UE may not transmit the PSSCH in the codeword immediately preceding the codeword configured for use by the PSFCH.

[0061] The present disclosure generally relates to the current problem of reserving resources for V2X communication. For example, in one aspect, the present disclosure includes a method, apparatus, and non-transitory computer-readable medium for wireless communication, for receiving, by a first UE, one or more reserved resources associated with any of the one or more second UEs from the one or more second UEs via a control channel; determining, by the first UE, one or more transmission resources to be reserved based on the one or more reserved resources over time; and transmitting, by the first UE, data to the one or more second UEs using the one or more reserved transmission resources.

[0062] Figure 44 is a flow chart of a method of wireless communication. The method may be performed by a UE (e.g., UE 104; apparatus 350; controller / processor 359 (which may include memory 360), processor(s) 512 (which may include memory 516, modem 540), which may be the entire UE 104 or components of the UE 104 (such as TX processor 368, RX processor 356, and / or transceiver 502)) in conjunction with communication component 198 / configuration component 240.

[0063] At 402, method 400 includes receiving, by a first user equipment (UE), one or more reserved resources associated with any one of the one or more second UEs over time from one or more second UEs via a control channel. In one aspect, UE 104 and / or communication component 198 / configuration component 240 may be configured to receive, by a first UE, one or more reserved resources associated with any one of the one or more second UEs over time from one or more second UEs via a control channel. As such, UE 104 and / or communication component 198 / configuration component 240 (e.g., in conjunction with controller / processor 359 (which may include memory 360), processor(s) 512 (which may include memory 516), modem 540, TX processor 368, and transceiver 502) may define means for receiving, by a first UE, one or more reserved resources associated with any one of the one or more second UEs over time from one or more second UEs via a control channel.

[0064] At 404, method 400 includes determining, by the first UE, one or more transmission resources to be reserved based on the one or more reserved resources in time. In one aspect, UE 104 and / or communication component 198 / configuration component 240 may be configured to determine, based on the one or more reserved resources in time, one or more transmission resources to be reserved. As such, UE 104 and / or communication component 198 / configuration component 240 (e.g., in conjunction with controller / processor 359 (which may include memory 360), processor(s) 512 (which may include memory 516), modem 540, RX processor 356, and transceiver 502) may define means for determining, by the first UE, one or more transmission resources to be reserved based on the one or more reserved resources in time.

[0065] For example, in method 400, UE 104 and / or communication component 198 / configuration component 240 are configured to determine one or more transmission resources to reserve, further comprising: establishing that the first UE and the one or more second UEs are configured to reserve a single resource in time; and calculating subsequent reserved transmission resources associated with the first UE based on avoiding overlap in time with the one or more reserved resources associated with the one or more second UEs. In one example, two types of reservations occur: periodic and aperiodic. For aperiodic reservations, the UE may explicitly reserve more than one resource for transmission in the future. For periodic reservations, the UE may periodically signal to signal that the above aperiodic reservations are repeated periodically.

[0066] In another example method 400, UE 104 and / or communication component 198 / configuration component 240 may be configured to receive, by a first UE, a periodicity value associated with the reserved resources in time from the one or more second UEs via a control channel. In this example, determining the one or more resources to be reserved further includes: determining that all resources, including the reserved resources and additional resources based on the periodicity value, are reserved; and calculating one or more subsequently selected reserved transmission resources associated with the first UE based on avoiding overlap in time with any of the reserved resources and the additional resources associated with the one or more second UEs. In some instances, the number of the one or more subsequently selected reserved transmission resources is at least one of preconfigured or adjustable.

[0067] In one example, the UE 104 and / or the communication component 198 / configuration component 240 are configured to transmit data using the one or more selected reserved resources, further comprising transmitting data using one or more subsequent reserved transmission resources. For example, the UE 104 and / or the communication component 198 / configuration component 240 can be configured to: determine whether a conflict is detected between the subsequent reserved transmission resource and any of the one or more reserved resources; discard the one or more subsequent reserved transmission resources upon transmission of data based on determining that a conflict is detected between the subsequent reserved transmission resource and any of the one or more reserved resources; and reselect to a new reserved transmission resource in response to discarding the one or more subsequent reserved transmission resources. In another example, the UE 104 and / or the communication component 198 / configuration component 240 can be configured to: determine whether a conflict is detected between the subsequent reserved transmission resource and any of the one or more reserved resources; and maintain the subsequent reserved transmission resource based on determining that a conflict is not detected between the subsequent reserved transmission resource and any of the one or more reserved resources.

[0068] At 406, method 400 includes transmitting, by the first UE, data to the one or more second UEs using the one or more reserved transmission resources. In one aspect, UE 104 and / or communication component 198 / configuration component 240 may be configured to transmit data to the one or more second UEs using the one or more reserved transmission resources. As such, UE 104 and / or communication component 198 / configuration component 240 (e.g., in conjunction with controller / processor 359 (which may include memory 360), processor(s) 512 (which may include memory 516), modem 540, RX processor 356, and transceiver 502) may define means for transmitting data to the one or more second UEs using the one or more reserved transmission resources by the first UE.

[0069] In one example of method 400, UE 104 and / or communication component 198 / configuration component 240 are configured to transmit data using the one or more reserved resources, further comprising transmitting data using a subsequent reserved transmission resource. Further, UE 104 and / or communication component 198 / configuration component 240 may be configured to: determine whether a conflict is detected between the subsequent reserved transmission resource and any of the one or more reserved resources; and based on determining that a conflict is detected between the subsequent reserved transmission resource and any of the one or more reserved resources, discard the subsequent reserved transmission resource upon transmission of the data, wherein the subsequent reserved transmission resource is configured for single use. In another example, UE 104 and / or communication component 198 / configuration component 240 may be configured to: determine whether a conflict is detected between the subsequent reserved transmission resource and any of the one or more reserved resources; and based on determining that a conflict is not detected between the subsequent reserved transmission resource and any of the one or more reserved resources, maintain the subsequent reserved transmission resource.

[0070] In another example of method 400, UE 104 and / or communication component 198 / configuration component 240 can be configured to receive, via a control channel, from the one or more second UEs a notification of a periodicity value associated with one or more reserved resources in time and a number of instances of the one or more reserved resources associated with the one or more second UEs to be maintained. Further in method 400, UE 104 and / or communication component 198 / configuration component 240 being configured to determine the one or more resources to be reserved further includes: selecting a second reserved resource and a second periodicity value, wherein each of the second reserved resource and the second periodicity value is different from the one or more reserved resources and the periodicity value to avoid overlap in time; and selecting the number of instances of the second reserved resource to be maintained, wherein the second reserved resource avoids conflicting with any of the one or more reserved resources.

[0071] In an example of method 400, UE 104 and / or communication component 198 / configuration component 240 configured to transmit data using the one or more reserved resources further includes transmitting data using the second reserved resources and the second periodicity value based on the number of instances of the second reserved resources to be maintained.

[0072] In one example of method 400 , the number of instances of the second reserved resource to be maintained is adjustable.

[0073] In one example of method 400, the UE 104 and / or communication component 198 / configuration component 240 are configured to determine one or more resources to reserve further including: determining a threshold regarding the number of instances; determining that the number of available resources for reservation fails to meet the threshold; and reducing the value of the number of instances of the second reserved resource to maintain based on determining that the number of available resources for reservation fails to meet the threshold.

[0074] In one example of method 400, the UE 104 and / or communication component 198 / configuration component 240 are configured to determine one or more resources to reserve further including: ranking the one or more available resources for reservation based on the number of times each of the one or more available resources will be available in a future instance; and selecting the one or more available resources for reservation based on the ranking.

[0075] In one example of method 400, the control channel corresponds to a physical sidelink control channel (PSCCH).

[0076] In example method 400, UE 104 and / or communication component 198 / configuration component 240 may be configured to receive, by the first UE, an offset value corresponding to a distance in time between the old resources and the new resources from the one or more second UEs via a control channel; and wherein determining the one or more resources to retain further includes determining the one or more resources to retain based on the offset.

[0077] Reference Figure 5 , one example of an implementation of the UE 104 may include various components, some of which have been described above and are further described herein, including components such as one or more processors 512 and memory 516 in communication via one or more buses 544 and a transceiver 502, which may be operable in conjunction with a modem 540 and / or a configuration component 198 for improved resource selection with respect to SPS in 5G NR V2X.

[0078] In one aspect, the one or more processors 512 may include the modem 540 and / or may be part of the modem 540 using one or more modem processors. Thus, various functions associated with the communication component 198 may be included in the modem 540 and / or the processor 512 and, in one aspect, may be performed by a single processor, while in other aspects, different ones of these functions may be performed by a combination of two or more different processors. For example, in one aspect, the one or more processors 512 may include any one or any combination of the following: a modem processor, a baseband processor, a digital signal processor, a transmit processor, a receiver processor, or a transceiver processor associated with the transceiver 502. In other aspects, some of the features of the one or more processors 512 and / or the modem 540 associated with the communication component 198 may be performed by the transceiver 502.

[0079] In addition, the memory 516 can be configured to store local versions of data and / or applications 575 used herein or the communication component 198 and / or one or more subcomponents executed by the at least one processor 512. The memory 516 can include any type of computer-readable medium usable by a computer or the at least one processor 512, such as random access memory (RAM), read-only memory (ROM), tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and any combination thereof. In one aspect, for example, when the UE 104 is operating the at least one processor 512 to execute the communication component 198 and / or one or more subcomponents thereof, the memory 516 can be a non-transitory computer-readable storage medium that stores one or more computer-executable codes and / or data associated therewith that define the communication component 198 and / or one or more subcomponents thereof.

[0080] The transceiver 502 may include at least one receiver 506 and at least one transmitter 508. The receiver 506 may include hardware for receiving data and / or software code executable by a processor, the code comprising instructions and stored in memory (e.g., a computer-readable medium). The receiver 506 may be, for example, a radio frequency (RF) receiver. In one aspect, the receiver 506 may receive signals transmitted by at least one base station 102. In addition, the receiver 506 may process such received signals and may also obtain signal measurements such as, but not limited to, Ec / Io, signal-to-noise ratio (SNR), reference signal received power (RSRP), received signal strength indicator (RSSI), and the like. The transmitter 508 may include hardware and / or software executable by a processor for transmitting data, the code comprising instructions and stored in memory (e.g., a computer-readable medium). Suitable examples of the transmitter 508 may include, but are not limited to, an RF transmitter.

[0081] Moreover, in an aspect, the UE 104 may include an RF front end 588 that may operate in communication with the one or more antennas 565 and the transceiver 502 for receiving and transmitting radio transmissions, such as wireless communications transmitted by at least one base station 102 or wireless transmissions transmitted by the UE 104. The RF front end 588 may be connected to the one or more antennas 565 and may include one or more low noise amplifiers (LNAs) 590, one or more switches 592, one or more power amplifiers (PAs) 598, and one or more filters 596 for transmitting and receiving RF signals.

[0082] In one aspect, the LNA 590 can amplify the received signal to a desired output level. In one aspect, each LNA 590 can have a specified minimum and maximum gain value. In one aspect, the RF front end 588 can use one or more switches 592 to select a particular LNA 590 and its specified gain value based on the desired gain value for a particular application.

[0083] Furthermore, for example, one or more PAs 598 can be used by the RF front end 588 to amplify the signal to obtain an RF output at a desired output power level. In one aspect, each PA 598 can have a specified minimum and maximum gain value. In one aspect, the RF front end 588 can use one or more switches 592 to select a particular PA 598 and its specified gain value based on the desired gain value for a particular application.

[0084] Additionally, for example, one or more filters 596 can be used by the RF front end 588 to filter a received signal to obtain an input RF signal. Similarly, in one aspect, for example, a corresponding filter 596 can be used to filter the output from a corresponding PA 598 to produce an output signal for transmission. In one aspect, each filter 596 can be connected to a specific LNA 590 and / or PA 598. In one aspect, the RF front end 588 can use one or more switches 592 to select a transmit or receive path using a specific filter 596, LNA 590, and / or PA 598 based on a configuration as specified by the transceiver 502 and / or the processor 512.

[0085] As such, the transceiver 502 can be configured to transmit and receive wireless signals via the RF front end 588 through one or more antennas 565. In an aspect, the transceiver can be tuned to operate at a specified frequency so that the UE 104 can communicate, for example, with one or more base stations 102 or one or more cells associated with the one or more base stations 102. In an aspect, the modem 540 can configure the transceiver 502 to operate at a specified frequency and power level based on, for example, the UE configuration of the UE 104 and the communication protocol used by the modem 540.

[0086] In one aspect, the modem 540 can be a multi-band-multimode modem that can process digital data and communicate with the transceiver 502 so that the digital data is sent and received using the transceiver 502. In one aspect, the modem 540 can be multi-band and configured to support multiple frequency bands for a specific communication protocol. In one aspect, the modem 540 can be multi-mode and configured to support multiple operating networks and communication protocols. In one aspect, the modem 540 can control one or more components of the UE 104 (e.g., the RF front end 588, the transceiver 502) to enable transmission and / or reception of signals from the network based on a specified modem configuration. In one aspect, the modem configuration can be based on the mode of the modem and the frequency band used. In another aspect, the modem configuration can be based on UE configuration information associated with the UE 104, such as provided by the network during cell selection and / or cell reselection.

[0087] In one aspect, the processor(s) 512 may correspond to a Figure 3 Similarly, the memory 516 may correspond to one or more of the processors described in conjunction with the UE. Figure 3 The memory described by the UE in.

[0088] Reference Figure 6 , one example of an implementation of a base station 102 (e.g., base station 102, as described above) may include various components, some of which have been described above, but also include components such as one or more processors 612 and memory 616 in communication via one or more buses 644 and a transceiver 602, which may operate in conjunction with a modem 640 and communication component 199 for communicating reference signals.

[0089] The transceiver 602, receiver 606, transmitter 608, one or more processors 612, memory 616, applications 675, bus 644, RF front end 688, LNA 690, switch 692, filter 696, PA 698, and one or more antennas 665 may be the same as or similar to the corresponding components of the UE 104 as described above, but are configured or otherwise programmed for base station operation rather than UE operation.

[0090] In one aspect, processor(s) 612 may correspond to a processor that is coupled to Figure 3 Similarly, the memory 616 may correspond to one or more of the processors described in conjunction with the base station. Figure 3 The memory described in the base station.

[0091] Some further example clauses

[0092] Implementation examples are described in the following numbered clauses:

[0093] 1. A wireless communication method, comprising:

[0094] receiving, by a first user equipment (UE), from one or more second UEs via a control channel, one or more reserved resources in time associated with any of the one or more second UEs;

[0095] determining, by the first UE, one or more transmission resources to be reserved based on the one or more reserved resources in time; and

[0096] Data is transmitted by the first UE to the one or more second UEs using the one or more reserved transmission resources.

[0097] 2. The method of clause 1, wherein determining the one or more transmission resources to be reserved further comprises:

[0098] establishing that the first UE and the one or more second UEs are configured to reserve a single resource in time; and

[0099] Subsequent reserved transmission resources associated with the first UE are calculated based on avoiding overlap in time with the one or more reserved resources associated with the one or more second UEs.

[0100] 3. The method of any of the preceding clauses, further comprising receiving, by the first UE from the one or more second UEs via the control channel, a periodicity value associated with the reserved resources in time.

[0101] 4. The method of any of the preceding clauses, wherein determining the one or more resources to reserve further comprises:

[0102] determining that all resources including the reserved resource and additional resources based on the periodic value are reserved; and

[0103] One or more subsequent reserved transmission resources associated with the first UE are calculated based on avoiding overlap in time with either of the reserved resources and the additional resources associated with the one or more second UEs.

[0104] 5. The method of any of the preceding clauses, wherein the number of the one or more subsequent reserved transmission resources is at least one of preconfigured or adjustable.

[0105] 6. The method of any of the preceding clauses, wherein transmitting the data using the one or more reserved resources further comprises transmitting the data using the one or more subsequent reserved transmission resources.

[0106] 7. The method of any of the preceding clauses, further comprising

[0107] determining whether a conflict between the one or more subsequent reserved transmission resources and any of the one or more reserved resources is detected;

[0108] discarding the one or more subsequent reserved transmission resources upon transmission of the data based on determining that a conflict between the subsequent reserved transmission resource and any of the one or more reserved resources is detected; and

[0109] Reselecting to new reserved transmission resources is performed in response to discarding the one or more subsequent reserved transmission resources.

[0110] 8. The method of any of the preceding clauses, further comprising:

[0111] determining whether a conflict is detected between the subsequent reserved transmission resource and any of the one or more reserved resources; and

[0112] The subsequent reserved transmission resource is maintained based on determining that no conflict is detected between the subsequent reserved transmission resource and any of the one or more reserved resources.

[0113] 9. The method of any of the preceding clauses, wherein transmitting the data using the one or more reserved resources further comprises transmitting the data using the subsequent reserved transmission resources.

[0114] 10. The method of any of the preceding clauses, further comprising:

[0115] determining whether a conflict is detected between the subsequent reserved transmission resource and any of the one or more reserved resources; and

[0116] The subsequent reserved transmission resource is discarded upon transmission of the data based on determining that a conflict between the subsequent reserved transmission resource and any of the one or more reserved resources is detected, wherein the subsequent reserved transmission resource is configured for single use.

[0117] 11. The method of any of the preceding clauses, further comprising:

[0118] determining whether a conflict is detected between the subsequent reserved transmission resource and any of the one or more reserved resources; and

[0119] The subsequent reserved transmission resource is maintained based on determining that no conflict is detected between the subsequent reserved transmission resource and any of the one or more reserved resources.

[0120] 12. The method of any of the preceding clauses, further comprising receiving, by the first UE from the one or more second UEs via the control channel, a periodic value associated with the one or more reserved resources in time and a notification indicating the number of instances of the one or more reserved resources associated with the one or more second UEs to be maintained.

[0121] 13. The method of any of the preceding clauses, wherein determining the one or more resources to reserve further comprises:

[0122] selecting a second reserved resource and a second periodicity value, wherein each of the second reserved resource and the second periodicity value is different from the one or more reserved resources and periodicity values ​​to avoid overlap in time; and

[0123] A number of instances of a second reserved resource is selected to maintain, wherein the second reserved resource avoids conflicting with any of the one or more reserved resources.

[0124] 14. The method of any of the preceding clauses, wherein transmitting the data using the one or more reserved resources further comprises transmitting the data using a second reserved resource and a second periodicity value based on a number of instances of the second reserved resource to be maintained.

[0125] 15. The method of any of the preceding clauses, wherein the number of instances of the second reserved resource to be maintained is adjustable.

[0126] 16. The method of any of the preceding clauses, wherein determining the one or more resources to reserve further comprises:

[0127] determining a threshold value for the number of instances;

[0128] determining that the number of available resources for reservation fails to meet the threshold;

[0129] The value of the number of instances of the second reserved resource to maintain is reduced based on a determination that the number of available resources for reservation fails to satisfy the threshold.

[0130] 17. The method of any of the preceding clauses, wherein determining the one or more resources to reserve further comprises:

[0131] ranking the one or more available resources for reservation based on a number of times each of the one or more available resources will be available in a future instance; and

[0132] The one or more available resources are selected for reservation based on the ranking.

[0133] 18. The method of any of the preceding clauses, wherein the control channel corresponds to a Physical Sidelink Control Channel (PSCCH).

[0134] 19. The method of any preceding clause, further comprising receiving, by the first UE from the one or more second UEs via the control channel, an offset value corresponding to a distance in time between the old resources and the new resources; and

[0135] Wherein determining the one or more resources to reserve further comprises determining the one or more resources to reserve based on the offset.

[0136] 20. An apparatus for wireless communication, comprising:

[0137] transceiver;

[0138] a memory configured to store instructions; and

[0139] one or more processors communicatively coupled to the transceiver and the memory, wherein the one or more processors are configured to:

[0140] receiving, by a first user equipment (UE), from one or more second UEs via a control channel, one or more reserved resources in time associated with any of the one or more second UEs;

[0141] determining, by the first UE, one or more transmission resources to be reserved based on the one or more reserved resources in time; and

[0142] Data is transmitted by the first UE to the one or more second UEs using the one or more reserved transmission resources.

[0143] 21. The apparatus of clause 20, wherein the one or more processors configured to determine the one or more transmission resources to reserve are further configured to:

[0144] establishing that the first UE and the one or more second UEs are configured to reserve a single resource in time; and

[0145] Subsequent reserved transmission resources associated with the first UE are calculated based on avoiding overlap in time with the one or more reserved resources associated with the one or more second UEs.

[0146] 22. The apparatus of any preceding clause, wherein the one or more processors are configured to receive, by the first UE from the one or more second UEs via the control channel, a periodicity value associated with the reserved resources in time.

[0147] 23. The apparatus of any of the preceding clauses, wherein the one or more processors configured to determine the one or more resources to reserve are further configured to:

[0148] determining that all resources including the reserved resource and additional resources based on the periodic value are reserved; and

[0149] calculating one or more subsequent reserved transmission resources associated with the first UE based on avoiding temporal overlap with any of the reserved resources and the additional resources associated with the one or more second UEs, wherein the number of the one or more subsequent reserved transmission resources is at least one of preconfigured or adjustable, and

[0150] Wherein transmitting the data using the one or more reserved resources further comprises transmitting the data using the one or more subsequent reserved transmission resources.

[0151] 24. The apparatus of any of the preceding clauses, wherein the one or more processors configured to transmit the data using the one or more reserved resources is further configured to transmit the data using the subsequent reserved transmission resources.

[0152] 25. An apparatus as described in any of the preceding clauses, wherein the one or more processors are configured to receive, by the first UE from the one or more second UEs via the control channel, a periodic value associated with the one or more reserved resources in time and a notification indicating the number of instances of the one or more reserved resources associated with the one or more second UEs to be maintained.

[0153] 26. The apparatus of any of the preceding clauses, wherein the one or more processors configured to determine the one or more resources to reserve are further configured to:

[0154] selecting a second reserved resource and a second periodicity value, wherein each of the second reserved resource and the second periodicity value is different from the one or more reserved resources and periodicity values ​​to avoid overlap in time; and

[0155] A number of instances of a second reserved resource is selected to maintain, wherein the second reserved resource avoids conflicting with any of the one or more reserved resources.

[0156] 27. The apparatus of any of the preceding clauses, wherein the control channel corresponds to a Physical Sidelink Control Channel (PSCCH).

[0157] 28. The apparatus of any preceding clause, wherein the one or more processors are configured to receive, by the first UE from the one or more second UEs via the control channel, an offset value corresponding to a distance in time between the old resources and the new resources; and

[0158] Wherein the one or more processors configured to determine the one or more resources to reserve are further configured to determine the one or more resources to reserve based on the offset.

[0159] 29. A device for wireless communication, comprising:

[0160] means for receiving, by a first user equipment (UE), from one or more second UEs via a control channel, one or more reserved resources in time associated with any of the one or more second UEs;

[0161] means for determining, by the first UE, one or more transmission resources to reserve based on the one or more reserved resources in time; and

[0162] Means for transmitting, by the first UE, data to the one or more second UEs using the one or more reserved transmission resources.

[0163] 30. A non-transitory computer-readable medium comprising code executable by one or more processors to:

[0164] receiving, by a first user equipment (UE), from one or more second UEs via a control channel, one or more reserved resources in time associated with any of the one or more second UEs;

[0165] determining, by the first UE, one or more transmission resources to be reserved based on the one or more reserved resources in time; and

[0166] Data is transmitted by the first UE to the one or more second UEs using the one or more reserved transmission resources.

[0167] It should be understood that the specific order or hierarchy of the blocks in the disclosed process / flowcharts is an illustration of an example approach. It should be understood that the specific order or hierarchy of the blocks in these process / flowcharts can be rearranged based on design preferences. In addition, some blocks can be combined or omitted. The accompanying method claims present the elements of the various blocks in an example order and are not meant to be limited to the specific order or hierarchy presented.

[0168] The preceding description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the universal principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but rather should be granted the full scope consistent with the language of the claims, wherein singular references to elements are not intended to mean "one and only one," but rather "one or more," unless otherwise specified. The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any aspect described herein as "exemplary" is not necessarily to be construed as superior to or superior to other aspects. Unless otherwise specifically stated, the term "some" refers to one or more. Combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" include any combination of A, B, and / or C, and may include multiple As, multiple Bs, or multiple Cs. Specifically, combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, wherein any such combination may include one or more members of A, B, or C. All structural and functional equivalents of the various aspects described throughout this disclosure to those of ordinary skill in the art now or hereafter known are expressly incorporated herein by reference and are intended to be encompassed by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is expressly recited in the claims. The terms "module," "mechanism," "element," "device," etc. may not be a substitute for the term "means." As such, no claim element should be construed as means-plus-function unless the element is expressly recited using the phrase "means for."

Claims

1. A wireless communication method, comprising: receiving, by a first user equipment UE, from one or more second UEs via a control channel, one or more reserved resources in time associated with any of the one or more second UEs; Determining, by the first UE, one or more transmission resources to be reserved based on the one or more reserved resources in time, wherein determining the one or more transmission resources to be reserved further comprises: establishing that the first UE and the one or more second UEs are configured to reserve a single resource in time; and calculating subsequent reserved transmission resources associated with the first UE based on avoiding overlap in time with the one or more reserved resources associated with the one or more second UEs; and Data is transmitted by the first UE to the one or more second UEs using the one or more reserved transmission resources. 2 . The method of claim 1 , further comprising receiving, by the first UE from the one or more second UEs via the control channel, a periodicity value associated with a single resource in time.

3. The method of claim 1 , wherein determining the one or more resources to reserve further comprises: determining that all resources including the single resource and additional resources based on the periodic value are reserved; as well as One or more subsequent reserved transmission resources associated with the first UE are calculated based on avoiding overlap in time with any of the single resource and the additional resources associated with the one or more second UEs. 4 . The method of claim 3 , wherein the number of the one or more subsequent reserved transmission resources is at least one of preconfigured or adjustable.

5. The method of claim 1, wherein transmitting the data using the one or more reserved resources further comprises transmitting the data using the one or more subsequent reserved transmission resources.

6. The method of claim 5, further comprising: determining whether a conflict is detected between the one or more subsequent reserved transmission resources and any of the one or more reserved resources; discarding the one or more subsequent reserved transmission resources upon transmission of the data based on determining that a conflict between the subsequent reserved transmission resource and any of the one or more reserved resources is detected; as well as Reselecting to new reserved transmission resources is performed in response to discarding the one or more subsequent reserved transmission resources.

7. The method of claim 5, further comprising: determining whether a conflict between the subsequent reserved transmission resource and any of the one or more reserved resources is detected; as well as The subsequent reserved transmission resource is maintained based on determining that no conflict is detected between the subsequent reserved transmission resource and any of the one or more reserved resources.

8. The method of claim 1, wherein transmitting the data using the one or more reserved resources further comprises transmitting the data using the subsequent reserved transmission resources.

9. The method of claim 8, further comprising: determining whether a conflict between the subsequent reserved transmission resource and any of the one or more reserved resources is detected; as well as The subsequent reserved transmission resource is discarded upon transmission of the data based on a determination that a conflict between the subsequent reserved transmission resource and any of the one or more reserved resources is detected, wherein the subsequent reserved transmission resource is configured for single use.

10. The method of claim 8, further comprising: determining whether a conflict between the subsequent reserved transmission resource and any of the one or more reserved resources is detected; as well as The subsequent reserved transmission resource is maintained based on determining that no conflict is detected between the subsequent reserved transmission resource and any of the one or more reserved resources.

11. The method of claim 1 , further comprising receiving, by the first UE from the one or more second UEs via the control channel, a periodicity value associated with the one or more reserved resources in time and a notification indicating a number of instances of the one or more reserved resources associated with the one or more second UEs to be maintained.

12. The method of claim 11 , wherein determining the one or more resources to reserve further comprises: selecting a second reserved resource and a second periodicity value, wherein each of the second reserved resource and the second periodicity value is different from the one or more reserved resources and periodicity values ​​to avoid overlap in time; and A number of instances of the second reserved resource is selected to maintain, wherein the second reserved resource avoids conflicting with any of the one or more reserved resources.

13. The method of claim 12, wherein transmitting the data using the one or more reserved resources further comprises transmitting the data using the second reserved resources and the second periodicity value based on a number of instances for which the second reserved resources are to be maintained.

14. The method of claim 12, wherein the number of instances of the second reserved resource to be maintained is adjustable.

15. The method of claim 11 , wherein determining the one or more resources to reserve further comprises: determining a threshold value for said number of instances; determining that a number of available resources for reservation fails to satisfy the threshold; A value of the number of instances of a second reserved resource to maintain is reduced based on a determination that the number of available resources for reservation fails to satisfy the threshold.

16. The method of claim 11 , wherein determining the one or more resources to reserve further comprises: ranking the one or more available resources for reservation based on a number of times each of the one or more available resources will be available in a future instance; as well as The one or more available resources are selected for reservation based on the ranking.

17. The method of claim 1, wherein the control channel corresponds to a Physical Sidelink Control Channel (PSCCH).

18. The method of claim 1 , further comprising receiving, by the first UE from the one or more second UEs via the control channel, an offset value corresponding to a distance in time between old resources and new resources; and Wherein determining the one or more resources to reserve further comprises determining the one or more resources to reserve based on the offset.

19. An apparatus for wireless communication, comprising: transceiver; a memory configured to store instructions; as well as one or more processors communicatively coupled to the transceiver and the memory, wherein the one or more processors are configured to: receiving, by a first user equipment UE, from one or more second UEs via a control channel, one or more reserved resources in time associated with any of the one or more second UEs; determining, by the first UE, one or more transmission resources to be reserved based on the one or more reserved resources in time, wherein the one or more processors configured to determine the one or more transmission resources to be reserved are further configured to: establishing that the first UE and the one or more second UEs are configured to reserve a single resource in time; as well as calculating subsequent reserved transmission resources associated with the first UE based on avoiding overlap in time with the one or more reserved resources associated with the one or more second UEs; as well as Data is transmitted by the first UE to the one or more second UEs using the one or more reserved transmission resources.

20. The apparatus of claim 19, wherein the one or more processors are configured to receive, by the first UE from the one or more second UEs via the control channel, a periodicity value associated with a single resource in time.

21. The apparatus of claim 19, wherein the one or more processors configured to determine the one or more resources to reserve are further configured to: determining that all resources, including the single resource and additional resources based on the periodic value, are reserved; and calculating one or more subsequent reserved transmission resources associated with the first UE based on avoiding temporal overlap with any of the single resource and the additional resources associated with the one or more second UEs, wherein the number of the one or more subsequent reserved transmission resources is at least one of preconfigured or adjustable, and Wherein the one or more processors configured to transmit the data using the one or more reserved resources are further configured to transmit the data using the one or more subsequent reserved transmission resources.

22. The apparatus of claim 19, wherein the one or more processors configured to transmit the data using the one or more reserved resources are further configured to transmit the data using the subsequent reserved transmission resources.

23. The apparatus of claim 22, wherein the one or more processors are configured to: determining whether a conflict is detected between the one or more subsequent reserved transmission resources and any of the one or more reserved resources; discarding the one or more subsequent reserved transmission resources upon transmission of the data based on determining that a conflict between the subsequent reserved transmission resource and any of the one or more reserved resources is detected; as well as Reselecting to new reserved transmission resources is performed in response to discarding the one or more subsequent reserved transmission resources.

24. The apparatus of claim 22, wherein the one or more processors are configured to: determining whether a conflict is detected between the subsequent reserved transmission resource and any of the one or more reserved resources; and The subsequent reserved transmission resource is maintained based on determining that no conflict is detected between the subsequent reserved transmission resource and any of the one or more reserved resources.

25. The apparatus of claim 19, wherein the one or more processors are configured to receive, by the first UE from the one or more second UEs via the control channel, a periodicity value associated with the one or more reserved resources in time and a notification indicating a number of instances of the one or more reserved resources associated with the one or more second UEs to be maintained.

26. The apparatus of claim 25, wherein the one or more processors configured to determine the one or more resources to reserve are further configured to: selecting a second reserved resource and a second periodicity value, wherein each of the second reserved resource and the second periodicity value is different from the one or more reserved resources and periodicity values ​​to avoid overlap in time; and A number of instances of the second reserved resource is selected to maintain, wherein the second reserved resource avoids conflicting with any of the one or more reserved resources.

27. The apparatus of claim 26, wherein the one or more processors configured to transmit the data using the one or more reserved resources are further configured to transmit the data using the second reserved resources and the second periodicity value based on a number of instances for which the second reserved resources are to be maintained.

28. The apparatus of claim 26, wherein the number of instances of the second reserved resource to be maintained is adjustable.

29. The apparatus of claim 25, wherein the one or more processors configured to determine the one or more resources to reserve are further configured to: determining a threshold value for said number of instances; determining that a number of available resources for reservation fails to satisfy the threshold; A value of the number of instances of a second reserved resource to maintain is reduced based on a determination that the number of available resources for reservation fails to satisfy the threshold.

30. The apparatus of claim 25, wherein the one or more processors configured to determine the one or more resources to reserve are further configured to: ranking the one or more available resources for reservation based on a number of times each of the one or more available resources will be available in a future instance; and The one or more available resources are selected for reservation based on the ranking.

31. The apparatus of claim 19, wherein the control channel corresponds to a Physical Sidelink Control Channel (PSCCH).

32. The apparatus of claim 19, wherein the one or more processors are configured to receive, by the first UE from the one or more second UEs via the control channel, an offset value corresponding to a distance in time between old resources and new resources; and Wherein the one or more processors configured to determine the one or more resources to reserve are further configured to determine the one or more resources to reserve based on the offset.

33. A device for wireless communication, comprising: means for receiving, by a first user equipment UE, from one or more second UEs via a control channel, one or more reserved resources in time associated with any of the one or more second UEs; means for determining, by the first UE, one or more transmission resources to be reserved based on the one or more reserved resources in time, wherein the means for determining the one or more transmission resources to be reserved further comprises: means for establishing that the first UE and the one or more second UEs are configured to reserve a single resource in time; and means for calculating subsequent reserved transmission resources associated with the first UE based on avoiding overlap in time with the one or more reserved resources associated with the one or more second UEs; and Means for transmitting, by the first UE, data to the one or more second UEs using the one or more reserved transmission resources.

34. A non-transitory computer-readable medium comprising code executable by one or more processors to: receiving, by a first user equipment (UE), from one or more second UEs via a control channel, one or more reserved resources in time associated with any of the one or more second UEs; Determining, by the first UE, one or more transmission resources to be reserved based on the one or more reserved resources in time, wherein determining the one or more transmission resources to be reserved further comprises: establishing that the first UE and the one or more second UEs are configured to reserve a single resource in time; and calculating subsequent reserved transmission resources associated with the first UE based on avoiding overlap in time with the one or more reserved resources associated with the one or more second UEs; and Data is transmitted by the first UE to the one or more second UEs using the one or more reserved transmission resources.

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