WO2021143711A1 - Prévention de perte de message de certificat complet c-v2x pendant une régulation de congestion - Google Patents

Prévention de perte de message de certificat complet c-v2x pendant une régulation de congestion Download PDF

Info

Publication number
WO2021143711A1
WO2021143711A1 PCT/CN2021/071409 CN2021071409W WO2021143711A1 WO 2021143711 A1 WO2021143711 A1 WO 2021143711A1 CN 2021071409 W CN2021071409 W CN 2021071409W WO 2021143711 A1 WO2021143711 A1 WO 2021143711A1
Authority
WO
WIPO (PCT)
Prior art keywords
packets
full
digests
certificates
transmitting
Prior art date
Application number
PCT/CN2021/071409
Other languages
English (en)
Inventor
Yue YIN
Yan Li
Shuping Chen
Original Assignee
Qualcomm Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Publication of WO2021143711A1 publication Critical patent/WO2021143711A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3263—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2425—Traffic characterised by specific attributes, e.g. priority or QoS for supporting services specification, e.g. SLA
    • H04L47/2433—Allocation of priorities to traffic types
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H04W12/069—Authentication using certificates or pre-shared keys
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/10—Integrity
    • H04W12/108—Source integrity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/80—Wireless
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/84—Vehicles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/34—Flow control; Congestion control ensuring sequence integrity, e.g. using sequence numbers

Definitions

  • Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to methods and apparatus that may enhance vehicle related communications, such as vehicle to everything (V2X) communications.
  • V2X vehicle to everything
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power) .
  • multiple-access technologies include Long Term Evolution (LTE) systems, code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.
  • LTE Long Term Evolution
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • a wireless multiple-access communication system may include a number of base stations, each simultaneously supporting communication for multiple communication devices, otherwise known as user equipment (UEs) .
  • UEs user equipment
  • a set of one or more base stations may define an eNodeB (eNB) .
  • eNB eNodeB
  • a wireless multiple access communication system may include a number of distributed units (DUs) (e.g., edge units (EUs) , edge nodes (ENs) , radio heads (RHs) , smart radio heads (SRHs) , transmission reception points (TRPs) , etc.
  • DUs distributed units
  • EUs edge units
  • ENs edge nodes
  • RHs radio heads
  • SSRHs smart radio heads
  • TRPs transmission reception points
  • CUs central units
  • CUs central units
  • CNs central nodes
  • ANCs access node controllers
  • a set of one or more distributed units, in communication with a central unit may define an access node (e.g., a new radio base station (NR BS) , a new radio node-B (NR NB) , a network node, 5G NB, gNB, etc. ) .
  • NR BS new radio base station
  • NR NB new radio node-B
  • 5G NB 5G NB
  • gNB network node
  • a base station or DU may communicate with a set of UEs on downlink channels (e.g., for transmissions from a base station or to a UE) and uplink channels (e.g., for transmissions from a UE to a base station or distributed unit) .
  • downlink channels e.g., for transmissions from a base station or to a UE
  • uplink channels e.g., for transmissions from a UE to a base station or distributed unit
  • NR new radio
  • 3GPP Third Generation Partnership Project
  • V2X communications seek to enable vehicles to communicate with one another to provide a host of services, including vehicle to vehicle communications (V2V) , vehicle to infrastructure (V2I) communications, vehicle to grid (V2G) communications and vehicle to people (V2P) communications.
  • V2V vehicle to vehicle communications
  • V2I vehicle to infrastructure
  • V2G vehicle to grid
  • V2P vehicle to people
  • Certain aspects provide a method for wireless communications by an apparatus.
  • the method generally includes transmitting packets that contains information about a vehicle, wherein some of the packets are transmitted with full certificates to verify the apparatus is authorized and some of the packets are transmitted with digests generated from full certificates and taking one or more actions to increase the likelihood that packets with full certificates are transmitted timely when subject to congestion control.
  • the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims.
  • the following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents.
  • FIG. 1 is a block diagram conceptually illustrating an example telecommunications system, in accordance with certain aspects of the present disclosure.
  • FIG. 2 is a block diagram conceptually illustrating a design of an example base station (BS) and user equipment (UE) , in accordance with certain aspects of the present disclosure.
  • BS base station
  • UE user equipment
  • FIGs. 3 and 4 illustrate vehicle to everything (V2X) communication systems, in accordance with certain aspects of the present disclosure.
  • FIG. 5 illustrates an example scenario involving basic safety messages (BSMs) with certificate and digests, in which aspects of the present disclosure may be practiced.
  • BSMs basic safety messages
  • FIG. 6 illustrates example operations for wireless communications by an apparatus, in accordance with certain aspects of the present disclosure.
  • FIGs. 7A and 7B illustrate example techniques for preventing the loss of V2X certificate messages, in accordance with certain aspects of the present disclosure.
  • FIG. 8 shows example packet priorities that may be assigned to help prevent the loss of V2X certificate messages, in accordance with certain aspects of the present disclosure.
  • FIGs. 9A and 9B show examples of how packet priorities shown in FIG. 8 may be assigned to help prevent the loss of V2X certificate messages, in accordance with certain aspects of the present disclosure.
  • Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to methods and apparatus that may enhance vehicle related communications, such as vehicle to everything (V2X) communications.
  • V2X vehicle to everything
  • a CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA) , cdma2000, etc.
  • UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA.
  • cdma2000 covers IS-2000, IS-95 and IS-856 standards.
  • a TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM) .
  • An OFDMA network may implement a radio technology such as NR (e.g.
  • E-UTRA Evolved UTRA
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX
  • IEEE 802.20 Flash-OFDMA
  • UMTS Universal Mobile Telecommunication System
  • NR is an emerging wireless communications technology under development in conjunction with the 5G Technology Forum (5GTF) .
  • 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are releases of UMTS that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named “3rd Generation Partnership Project” (3GPP) .
  • cdma2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • the techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, while aspects may be described herein using terminology commonly associated with 3G and/or 4G wireless technologies, aspects of the present disclosure can be applied in other generation-based communication systems, such as 5G and later, including NR technologies.
  • FIG. 1 illustrates an example wireless communication network 100 in which aspects of the present disclosure may be performed.
  • base stations (BSs) 110 in the network may communicate with vehicle UEs (V-UEs) configured to perform operations 600 of FIG. 6.
  • V-UEs vehicle UEs
  • the wireless network 100 may be a new radio (NR) or 5G network. As illustrated in FIG. 1, the wireless network 100 may include a number of BSs 110 and other network entities. A BS may be a station that communicates with UEs. Each BS 110 may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a Node B and/or a Node B subsystem serving this coverage area, depending on the context in which the term is used.
  • the term “cell” and gNB, Node B, 5G NB, AP, NR BS, NR BS, or TRP may be interchangeable.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the base stations may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the wireless communication network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, or the like using any suitable transport network.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular radio access technology (RAT) and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, an air interface, etc.
  • a frequency may also be referred to as a carrier, a frequency channel, etc.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or other types of cell.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG) , UEs for users in the home, etc. ) .
  • CSG Closed Subscriber Group
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • the BSs 110a, 110b and 110c may be macro BSs for the macro cells 102a, 102b and 102c, respectively.
  • the BS 110x may be a pico BS for a pico cell 102x.
  • the BSs 110y and 110z may be femto BS for the femto cells 102y and 102z, respectively.
  • a BS may support one or multiple (e.g., three) cells.
  • the wireless communication network 100 may also include relay stations.
  • a relay station is a station that receives a transmission of data and/or other information from an upstream station (e.g., a BS or a UE) and sends a transmission of the data and/or other information to a downstream station (e.g., a UE or a BS) .
  • a relay station may also be a UE that relays transmissions for other UEs.
  • a relay station 110r may communicate with the BS 110a and a UE 120r in order to facilitate communication between the BS 110a and the UE 120r.
  • a relay station may also be referred to as a relay BS, a relay, etc.
  • the wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BS, pico BS, femto BS, relays, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different impact on interference in the wireless network 100.
  • macro BS may have a high transmit power level (e.g., 20 Watts) whereas pico BS, femto BS, and relays may have a lower transmit power level (e.g., 1 Watt) .
  • the wireless communication network 100 may support synchronous or asynchronous operation.
  • the BSs may have similar frame timing, and transmissions from different BSs may be approximately aligned in time.
  • the BSs may have different frame timing, and transmissions from different BSs may not be aligned in time.
  • the techniques described herein may be used for both synchronous and asynchronous operation.
  • a network controller 130 may couple to a set of BSs and provide coordination and control for these BSs.
  • the network controller 130 may communicate with the BSs 110 via a backhaul.
  • the BSs 110 may also communicate with one another, e.g., directly or indirectly via wireless or wireline backhaul.
  • the UEs 120 may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, a Customer Premises Equipment (CPE) , a cellular phone, a smart phone, a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or medical equipment, a biometric sensor/device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wrist band, smart jewelry (e.g., a smart ring, a smart bracelet, etc.
  • MTC machine-type communication
  • eMTC evolved MTC
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., that may communicate with a BS, another device (e.g., remote device) , or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • a network e.g., a wide area network such as Internet or a cellular network
  • Some UEs may be considered Internet-of-Things (IoT) devices.
  • IoT Internet-of-Things
  • a solid line with double arrows indicates desired transmissions between a UE and a serving BS, which is a BS designated to serve the UE on the downlink and/or uplink.
  • a dashed line with double arrows indicates interfering transmissions between a UE and a BS.
  • Certain wireless networks utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single-carrier frequency division multiplexing (SC-FDM) on the uplink.
  • OFDM and SC-FDM partition the system bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, bins, etc.
  • K orthogonal subcarriers
  • Each subcarrier may be modulated with data.
  • modulation symbols are sent in the frequency domain with OFDM and in the time domain with SC-FDM.
  • the spacing between adjacent subcarriers may be fixed, and the total number of subcarriers (K) may be dependent on the system bandwidth.
  • the spacing of the subcarriers may be 15 kHz and the minimum resource allocation (called a “resource block” (RB) ) may be 12 subcarriers (or 180 kHz) . Consequently, the nominal FFT size may be equal to 128, 256, 512, 1024 or 2048 for system bandwidth of 1.25, 2.5, 5, 10 or 20 megahertz (MHz) , respectively.
  • the system bandwidth may also be partitioned into subbands. For example, a subband may cover 1.08 MHz (i.e., 6 resource blocks) , and there may be 1, 2, 4, 8 or 16 subbands for system bandwidth of 1.25, 2.5, 5, 10 or 20 MHz, respectively.
  • aspects of the examples described herein may be associated with LTE technologies, aspects of the present disclosure may be applicable with other wireless communications systems, such as NR.
  • NR may utilize OFDM with a cyclic prefix (CP) on the uplink and downlink and include support for half-duplex operation using time division duplexing (TDD) .
  • a single component carrier (CC) bandwidth of 100 MHz may be supported.
  • NR resource blocks may span 12 subcarriers with a subcarrier bandwidth of 75 kHz over a 0.1 ms duration.
  • Each radio frame may consist of 2 half frames, each half frame consisting of 5 subframes, with a length of 10 ms. Consequently, each subframe may have a length of 1 ms.
  • Each subframe may indicate a link direction (i.e., DL or UL) for data transmission and the link direction for each subframe may be dynamically switched.
  • Each subframe may include DL/UL data as well as DL/UL control data.
  • UL and DL subframes for NR may be as described in more detail below with respect to FIGs. 6 and 7.
  • Beamforming may be supported and beam direction may be dynamically configured.
  • MIMO transmissions with precoding may also be supported.
  • MIMO configurations in the DL may support up to 8 transmit antennas with multi-layer DL transmissions up to 8 streams and up to 2 streams per UE. Multi-layer transmissions with up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported with up to 8 serving cells.
  • NR may support a different air interface, other than an OFDM-based.
  • NR networks may include entities such central units (CUs) and/or distributed units (DUs) .
  • a scheduling entity e.g., a base station
  • the scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communication, subordinate entities utilize resources allocated by the scheduling entity.
  • Base stations are not the only entities that may function as a scheduling entity. That is, in some examples, a UE may function as a scheduling entity, scheduling resources for one or more subordinate entities (e.g., one or more other UEs) .
  • the UE is functioning as a scheduling entity, and other UEs utilize resources scheduled by the UE for wireless communication.
  • a UE may function as a scheduling entity in a peer-to-peer (P2P) network, and/or in a mesh network.
  • P2P peer-to-peer
  • UEs may optionally communicate directly with one another in addition to communicating with the scheduling entity.
  • a scheduling entity and one or more subordinate entities may communicate utilizing the scheduled resources.
  • a RAN may include a CU and DUs.
  • a NR BS e.g., gNB, 5G Node B, Node B, transmission reception point (TRP) , access point (AP)
  • NR cells can be configured as access cell (ACells) or data only cells (DCells) .
  • the RAN e.g., a CU or DU
  • DCells may be cells used for carrier aggregation or dual connectivity, but not used for initial access, cell selection/reselection, or handover. In some cases DCells may not transmit synchronization signals-in some case cases DCells may transmit SS.
  • NR BSs may transmit downlink signals to UEs indicating the cell type. Based on the cell type indication, the UE may communicate with the NR BS. For example, the UE may determine NR BSs to consider for cell selection, access, handover, and/or measurement based on the indicated cell type.
  • FIG. 2 illustrates example components of the BS 110 and UE 120 illustrated in FIG. 1, which may be used to implement aspects of the present disclosure.
  • the BS may include a TRP and may be referred to as a Master eNB (MeNB) (e.g., Master BS, primary BS) .
  • Master BS and the Secondary BS may be geographically co-located.
  • FIG. 2 shows a block diagram of a design of a BS 110 and a UE 120, which may be one of the BSs and one of the UEs in FIG. 1.
  • the BS 110 may be the macro BS 110c in FIG. 1, and the UE 120 may be the UE 120y.
  • the BS 110 may also be a BS of some other type.
  • the BS 110 may be equipped with antennas 234a through 234t, and the UE 120 may be equipped with antennas 252a through 252r.
  • a transmit processor 220 may receive data from a data source 212 and control information from a controller/processor 240.
  • the control information may be for the Physical Broadcast Channel (PBCH) , Physical Control Format Indicator Channel (PCFICH) , Physical Hybrid ARQ Indicator Channel (PHICH) , Physical Downlink Control Channel (PDCCH) , etc.
  • the data may be for the Physical Downlink Shared Channel (PDSCH) , etc.
  • the processor 220 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively.
  • the processor 220 may also generate reference symbols, e.g., for the PSS, SSS, and cell-specific reference signal (CRS) .
  • reference symbols e.g., for the PSS, SSS, and cell-specific reference signal (CRS) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) 232a through 232t.
  • Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream.
  • Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • Downlink signals from modulators 232a through 232t may be transmitted via the antennas 234a through 234t, respectively.
  • the antennas 252a through 252r may receive the downlink signals from the base station 110 and may provide received signals to the demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM, etc. ) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all the demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 260, and provide decoded control information to a controller/processor 280.
  • a transmit processor 264 may receive and process data (e.g., for the Physical Uplink Shared Channel (PUSCH) ) from a data source 262 and control information (e.g., for the Physical Uplink Control Channel (PUCCH) from the controller/processor 280.
  • the transmit processor 264 may also generate reference symbols for a reference signal.
  • the symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the demodulators 254a through 254r (e.g., for SC-FDM, etc. ) , and transmitted to the base station 110.
  • the uplink signals from the UE 120 may be received by the antennas 234, processed by the modulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 120.
  • the receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to the controller/processor 240.
  • the controllers/processors 240 and 280 may direct the operation at the base station 110 and the UE 120, respectively. In some cases, controller/processor 280 (and/or other components) of UE 120 may be configured to perform operations 600 of FIG. 6.
  • the memories 242 and 282 may store data and program codes for the BS 110 and the UE 120, respectively.
  • a scheduler 244 may schedule UEs for data transmission on the downlink and/or uplink.
  • two or more entities may communicate with each other using sidelink signals.
  • Real-world applications of such sidelink communications may include public safety, proximity services, UE-to-network relaying, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical mesh, and/or various other suitable applications.
  • a sidelink signal may refer to a signal communicated from one subordinate entity (e.g., UE1) to another subordinate entity (e.g., UE2) without relaying that communication through the scheduling entity (e.g., UE or BS) , even though the scheduling entity may be utilized for scheduling and/or control purposes.
  • the sidelink signals may be communicated using a licensed spectrum (unlike wireless local area networks, which typically use an unlicensed spectrum) .
  • a UE may operate in various radio resource configurations, including a configuration associated with transmitting pilots using a dedicated set of resources (e.g., a radio resource control (RRC) dedicated state, etc. ) or a configuration associated with transmitting pilots using a common set of resources (e.g., an RRC common state, etc. ) .
  • RRC radio resource control
  • the UE may select a dedicated set of resources for transmitting a pilot signal to a network.
  • the UE may select a common set of resources for transmitting a pilot signal to the network.
  • a pilot signal transmitted by the UE may be received by one or more network access devices, such as an AN, or a DU, or portions thereof.
  • Each receiving network access device may be configured to receive and measure pilot signals transmitted on the common set of resources, and also receive and measure pilot signals transmitted on dedicated sets of resources allocated to the UEs for which the network access device is a member of a monitoring set of network access devices for the UE.
  • One or more of the receiving network access devices, or a CU to which receiving network access device (s) transmit the measurements of the pilot signals may use the measurements to identify serving cells for the UEs, or to initiate a change of serving cell for one or more of the UEs.
  • LTE vehicle-to-everything (LTE-V2X) has been developed as a technology to address vehicular wireless communications to enhance road safety and the driving experience.
  • FIG. 3 a V2X system is illustrated with two vehicles.
  • the V2X system provided in FIGS. 3 and 4 provides two complementary transmission modes.
  • a first transmission mode involves direct communications between participants in the local area. Such communications are illustrated in FIG. 3.
  • a second transmission mode involves network communications through a network as illustrated in FIG. 4.
  • the first transmission mode allows for direct communication between different participants in a given geographic location.
  • a vehicle can have a communication with an individual (V2P) through a PC5 interface. Communications between a vehicle and another vehicle (V2V) may also occur through a PC5 interface.
  • V2P individual
  • V2V vehicle
  • communication may occur from a vehicle to other highway components, such as a signal (V2I) through a PC5 interface.
  • V2I signal
  • two-way communication can take place between elements, therefore each element may be a transmitter and a receiver of information.
  • the first transmission mode is a self-managed system and no network assistance is provided. Such transmission modes provide for reduced cost and increased reliability as network service interruptions do not occur during handover operations for moving vehicles. Resource assignments do not need coordination between operators and subscription to a network is not necessary, therefore there is reduced complexity for such self-managed systems.
  • the V2X system is configured to work in a 5.9 GHz spectrum, thus any vehicle with an equipped system may access this common frequency and share information. Such harmonized/common spectrum operations allows for safe operation. V2X operations may also co-exist with 802.11p operations by being placed on different channels, thus existing 802.11p operations will not be disturbed by the introduction of V2X systems.
  • the V2X system may be operated in a 10MHz band that describes/contains basic safety services.
  • the V2X system may be operated over a wider frequency band of 70MHz to support advanced safety services in addition to basic safety services described above.
  • a vehicle may communicate to another vehicle through network communications.
  • network communications may occur through discrete nodes, such as eNodeB (or gNodeB) , that send and receive information between vehicles.
  • the network communications may be used, for example, for long range communications between vehicles, such as noting the presence of an accident approximately 1 mile ahead.
  • Other types of communication may be sent by the node to vehicles, such as traffic flow conditions, road hazard warnings, environmental/weather reports, service station availability and other like data. Data can be obtained from cloud-based sharing services.
  • RSUs residential service units
  • 4G/5G small cell communication technologies to benefit in more highly covered areas to allow real time information to be shared among V2X users.
  • the V2X systems may rely more on small cell communications, as necessary.
  • higher layers may be leveraged to tune congestion control parameters.
  • using higher layers for such functions provides an enhanced performance on lower layers due to congestion control for PHY/MAC.
  • V2X technologies have significant advantages over 802.11p technologies.
  • Conventional 802.11p technologies have limited scaling capabilities and access control can be problematic.
  • V2X technologies two vehicles apart from one another may use the same resource without incident as there are no denied access requests.
  • V2X technologies also have advantages over 802.11p technologies as these V2X technologies are designed to meet latency requirements, even for moving vehicles, thus allowing for scheduling and access to resources in a timely manner.
  • Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to mechanisms that may enhance vehicle related communications, such as vehicle to everything (V2X) communications.
  • vehicle related communications such as vehicle to everything (V2X) communications.
  • the mechanisms described herein may be used to help prevent the loss of important information, such as that conveyed in basic safety messages (BSMs) that include full certificates due to congestion control.
  • BSMs basic safety messages
  • a BSM generally refers to a packet of data that contains information about a vehicle, such as vehicle position (e.g., latitude, longitude, elevation, and accuracy) , heading, speed, and other information (e.g., transmission state, heading angle, brake, acceleration, and deceleration) .
  • vehicle position e.g., latitude, longitude, elevation, and accuracy
  • heading e.g., heading angle, brake, acceleration, and deceleration
  • C-V2X deployments use a certificate mechanism to give authorization to valid users. Certificates are typically valid for a relatively short term and used primarily for basic safety message authentication and misbehavior reporting. For privacy reasons, a device may be given multiple certificates that are valid simultaneously, so that it can change (among) them frequently.
  • a certificate digest which is a hash of a full certificate, may be used as a compact representation of a full certificate.
  • a full certificate may be 100 bytes or more, while a certificate digest may be 10 bytes or less.
  • a vehicle When a vehicle receives a BSM with a full certificate, it will typically buffer the certificate in its memory. Later, when that same vehicle receives BSMs with a digest of a certificate, it will link the digest to the buffered certificate for future signature inspection.
  • a vehicle can keep using digests to replace certificates in BSM messages for a certain period of time (e.g., 450 ms) .
  • a BSM is sent periodically (e.g., every 100ms) .
  • a vehicle would typically send one BSM with a full certificate, followed by four digest-based BSMs.
  • aspects of the present disclosure may help prevent the loss of full certificate BSMs and/or trigger generation and transmission of a new full certificate BSM in the event that a full certificate BSM is discarded or skipped due to the congestion control mechanism.
  • FIG. 6 illustrates example operations 600 for wireless communications by a user equipment (UE) , in accordance with certain aspects of the present disclosure.
  • operations 600 may be performed by the V-UE shown in FIG. 5.
  • Operations 600 begin, at 602, by transmitting packets that contains information about a vehicle, wherein some of the packets are transmitted with full certificates to verify the apparatus is authorized and some of the packets are transmitted with digests generated from full certificates.
  • the vehicle (or V-UE) takes one or more actions to increase the likelihood that packets with full certificates are transmitted timely when subject to congestion control.
  • a congestion control mechanism can be implemented in either an upper (e.g., application) layer or lower (modem) layer, or both.
  • an upper layer or lower layer may discard a BSM message that contains a full certificate.
  • a new BSM with a full certificate may be generated and transmitted.
  • the exact steps for generating or transmitting a new full certificate BSM may depend on whether the previous full certificate BSM was lost in the upper or lower layer.
  • a procedure to generate and transmit a full certificate BSM may simply be restarted.
  • the lower layer will typically be configured to always send the latest message it gets from upper layer to make sure the latest vehicle information (e.g., location, heading etc. ) is transmitted. So, when the newly generated BSM with full certificate is received from upper layer, it will be transmitted immediately by the lower layer.
  • the lower layer may report the loss to the upper layer.
  • the upper layer may then generate and transmit a full certificate BSM.
  • a (V2X) device may take actions to prevent a full certificate BSM from being lost due to congestion control.
  • the actions may include assigning full service BSM packets a packet priority (e.g., a ProSe per Packet Priority or PPPP) value and/or semi-persistent scheduling (SPS) process with a higher priority than a packet priority and/or SPS process assigned to BSM packets with digests.
  • a packet priority e.g., a ProSe per Packet Priority or PPPP
  • SPS semi-persistent scheduling
  • FIG. 8 shows a table listing example PPPP relationships with channel busy ratios (CBRs) at the access layer.
  • CBRs channel busy ratios
  • smaller PPPP values will result in more available resources when there is congestion (as indicated by a higher constant bit rate-CBR-measured value) .
  • event-based BSMs use PPPP2 (e.g., to give priority to events such as rapid braking)
  • regular BSMs use PPPP5.
  • one SPS process may be assigned to a regular BSM with digest while another SPS process is assigned to regular BSMs with full certificate. According to this option, the same SPS process may be assigned to event-triggered BSMs.
  • one SPS process may be assigned to both the regular BSM with digest and the regular BSM with full certificate, while another SPS is assigned to the event-triggered BSMs.
  • LTE V2X evolution systems e.g., NR V2X
  • the regular BSMs with full certificates can be mapped to one SPS process
  • regular BSMs with digest can be mapped to another SPS process.
  • the event-triggered BSMs can be mapped to still another SPS process.
  • FIG. 9A illustrates the first option described above, where one SPS process (shown as SPS2) is assigned to a regular BSM with digest while another SPS process (shown as SPS1) is assigned to regular BSMs with full certificate and event-triggered BSMs.
  • SPS2 SPS2
  • SPS1 SPS1
  • digest-based BSMs are assigned a PPPP value of 5
  • full certificate BSMs are assigned a PPPP value of 2
  • event-triggered BSMs are assigned an even lower PPPP value of 1 (giving them the highest priority) .
  • full-certificate BSMs can be exempted from congestion control, so they are always sent to the lower layer to further handle.
  • the regular BSMs with full certificate and event-triggered BSMs occupy the same SPS.
  • the event-triggered BSMs have higher priority than the full-certificate BSMs, which can still guarantee the event-triggered BSMs have higher priority to make sure the critical-events related information (e.g., hard-braking) are transmitted without delay.
  • critical-events related information e.g., hard-braking
  • FIG. 9B illustrates the second option described above, where SPS2 is assigned to both regular BSMs with digests and regular BSMs with full certificates, while SPS1 is again assigned to event-triggered BSMs.
  • full-certificate BSMs can be exempted from congestion control, so they are always sent to lower layer and up to lower layer to further handle.
  • SPS2 full-certificate BSMs and digest based BSMs
  • SPS1 event based BSMs that occupy a different SPS
  • full-certificate BSMs have a higher priority (PPPP value of 3) than digest based BSMs (PPPP value of 5) , so when there is congestion, the transmission of full-certificate BSMs can be prioritized and delivery may be guaranteed.
  • the solution described in FIGs. 9A and 9B may also be straightforward to implement and configurable.
  • the event-triggered BSMs have higher priority than the full-certificate BSMs, which can guarantee the event-triggered BSM have higher priority.
  • the dedicated SPS process contains all the regular BSMs that needs to be further prioritized, and the higher priority (lower PPPP value) may help guarantee and prioritize the transmission of full-certificate BSMs.
  • a method for wireless communications by an apparatus comprising transmitting packets that contains information about a vehicle, wherein some of the packets are transmitted with full certificates to verify the apparatus is authorized and some of the packets are transmitted with digests generated from full certificates and taking one or more actions to increase a likelihood that packets with full certificates are transmitted timely when subject to congestion control.
  • Aspect 2 The method of Aspect 1, wherein the packets comprise basic safety messages (BSMs) .
  • BSMs basic safety messages
  • Aspect 3 The method of any of Aspects 1-2, further comprising generating digests as a hash of full certificates.
  • Aspect 4 The method of any of Aspects 1-3, wherein transmitting the packets comprises transmitting a packet with a full certificate valid for a period of time and transmitting multiple packets during the period of time with digests generated from the full certificate.
  • Aspect 5 The method of any of Aspects 1-4, wherein the one or more actions comprise detecting a packet with a full certificate was skipped or discarded due to congestion control, generating a new packet with a full certificate, in response to the detection, and transmitting the new packet with the full certificate.
  • Aspect 6 The method of Aspect 5, wherein the detection occurs at an application layer.
  • Aspect 7 The method of Aspect 5, wherein the detection occurs at a modem layer and the method further comprises reporting the detection from the modem layer to an application layer.
  • Aspect 8 The method of any of Aspects 1-7, wherein the one or more actions comprise prioritizing the transmission of packets with full certificates over packets with digests.
  • Aspect 9 The method of Aspect 8, wherein prioritizing the transmission of packets with full certificates over packets with digests comprises assigning a first semi-persistent scheduling (SPS) process associated with a first range of packet priority values to packets with full certificates and assigning a second SPS process associated with a second range of packet priority values to packets with digests, wherein packet priority values in the first range result in more available resources for transmitting packets with full certificates, during times of congestion, than available for transmitting packets with digests.
  • SPS semi-persistent scheduling
  • Aspect 10 The method of Aspect 9, wherein the second SPS process is also assigned to event triggered packets.
  • Aspect 11 The method of Aspect 8, wherein prioritizing the transmission of packets with full certificates over packets with digests comprises assigning a first semi-persistent scheduling (SPS) process associated with a first range of packet priority values to event triggered packets, assigning a second SPS process associated with a second range of packet priority values to both packets with digests and packets with full certificates, and assigning packets with full certificates a packet priority value from the second range that results in more available resources for transmitting packets with full certificates, during times of congestion, than available for transmitting packets with digests.
  • SPS semi-persistent scheduling
  • An apparatus for wireless communications comprising a transmitter configured to transmit packets that contains information about a vehicle, wherein some of the packets are transmitted with full certificates to verify the apparatus is authorized and some of the packets are transmitted with digests generated from full certificates and at least one processor configured to take one or more actions to increase the likelihood that packets with full certificates are transmitted timely when subject to congestion control.
  • Aspect 13 The apparatus of Aspect 12, wherein the packets comprise basic safety messages (BSMs) .
  • BSMs basic safety messages
  • Aspect 14 The apparatus of any of Aspects 12-13, wherein the at least one processor is further configured to generate digests as a hash of full certificates.
  • Aspect 15 The apparatus of any of Aspects 12-15, wherein the transmitter is configured to transmit a packet with a full certificate valid for a period of time and transmit multiple packets during the period of time with digests generated from the full certificate.
  • Aspect 16 The apparatus of any of Aspects 12-15, wherein the one or more actions comprise detecting a packet with a full certificate was skipped or discarded due to congestion control, generating a new packet with a full certificate, in response to the detection, and transmitting the new packet with the full certificate.
  • Aspect 17 The apparatus of Aspect 16, wherein the detection occurs at an application layer.
  • Aspect 18 The apparatus of Aspect 16, wherein the detection occurs at a modem layer and the at least one processor is further configured to report the detection from the modem layer to an application layer.
  • Aspect 19 The apparatus of any of Aspects 12-18, wherein the one or more actions comprise prioritizing the transmission of packets with full certificates over packets with digests.
  • Aspect 20 The apparatus of Aspect 19, wherein prioritizing the transmission of packets with full certificates over packets with digests comprises assigning a first semi-persistent scheduling (SPS) process associated with a first range of packet priority values to packets with full certificates and assigning a second SPS process associated with a second range of packet priority values to packets with digests, wherein packet priority values in the first range result in more available resources for transmitting packets with full certificates, during times of congestion, than available for transmitting packets with digests.
  • SPS semi-persistent scheduling
  • Aspect 21 The apparatus of Aspect 20, wherein the second SPS process is also assigned to event triggered packets.
  • Aspect 22 The apparatus of Aspect 19, wherein prioritizing the transmission of packets with full certificates over packets with digests comprises assigning a first semi-persistent scheduling (SPS) process associated with a first range of packet priority values to event triggered packets, assigning a second SPS process associated with a second range of packet priority values to both packets with digests and packets with full certificates, and assigning packets with full certificates a packet priority value from the second range that results in more available resources for transmitting packets with full certificates, during times of congestion, than available for transmitting packets with digests.
  • SPS semi-persistent scheduling
  • Aspect 23 An apparatus for wireless communications, comprising means for transmitting packets that contains information about a vehicle, wherein some of the packets are transmitted with full certificates to verify the apparatus is authorized and some of the packets are transmitted with digests generated from full certificates and means for taking one or more actions to increase a likelihood that packets with full certificates are transmitted timely when subject to congestion control.
  • a computer readable medium having instructions stored thereon for transmitting packets that contains information about a vehicle, wherein some of the packets are transmitted with full certificates to verify the apparatus is authorized and some of the packets are transmitted with digests generated from full certificates and taking one or more actions to increase a likelihood that packets with full certificates are transmitted timely when subject to congestion control.
  • the methods disclosed herein comprise one or more steps or actions for achieving the described method.
  • the method steps and/or actions may be interchanged with one another without departing from the scope of the claims.
  • the order and/or use of specific steps and/or actions may be modified without departing from the scope of the claims.
  • a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members.
  • “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .
  • determining encompasses a wide variety of actions. For example, “determining” may include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” may include receiving (e.g., receiving information) , accessing (e.g., accessing data in a memory) and the like. Also, “determining” may include resolving, selecting, choosing, establishing and the like.
  • the various operations of methods described above may be performed by any suitable means capable of performing the corresponding functions.
  • the means may include various hardware and/or software component (s) and/or module (s) , including, but not limited to a circuit, an application specific integrated circuit (ASIC) , or processor.
  • ASIC application specific integrated circuit
  • various processors shown in FIG. 4 may be configured to perform operations described herein and illustrated in FIG. 6.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • PLD programmable logic device
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • an example hardware configuration may comprise a processing system in a wireless node.
  • the processing system may be implemented with a bus architecture.
  • the bus may include any number of interconnecting buses and bridges depending on the specific application of the processing system and the overall design constraints.
  • the bus may link together various circuits including a processor, machine-readable media, and a bus interface.
  • the bus interface may be used to connect a network adapter, among other things, to the processing system via the bus.
  • the network adapter may be used to implement the signal processing functions of the PHY layer.
  • a user interface e.g., keypad, display, mouse, joystick, etc.
  • a user interface e.g., keypad, display, mouse, joystick, etc.
  • the bus may also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further.
  • the processor may be implemented with one or more general-purpose and/or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuitry that can execute software. Those skilled in the art will recognize how best to implement the described functionality for the processing system depending on the particular application and the overall design constraints imposed on the overall system.
  • the functions may be stored or transmitted over as one or more instructions or code on a computer readable medium.
  • Software shall be construed broadly to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • Computer-readable media include both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • the processor may be responsible for managing the bus and general processing, including the execution of software modules stored on the machine-readable storage media.
  • a computer-readable storage medium may be coupled to a processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor.
  • the machine-readable media may include a transmission line, a carrier wave modulated by data, and/or a computer readable storage medium with instructions stored thereon separate from the wireless node, all of which may be accessed by the processor through the bus interface.
  • the machine-readable media, or any portion thereof may be integrated into the processor, such as the case may be with cache and/or general register files.
  • machine-readable storage media may include, by way of example, RAM (Random Access Memory) , flash memory, ROM (Read Only Memory) , PROM (Programmable Read-Only Memory) , EPROM (Erasable Programmable Read-Only Memory) , EEPROM (Electrically Erasable Programmable Read-Only Memory) , registers, magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof.
  • RAM Random Access Memory
  • ROM Read Only Memory
  • PROM Programmable Read-Only Memory
  • EPROM Erasable Programmable Read-Only Memory
  • EEPROM Electrical Erasable Programmable Read-Only Memory
  • registers magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof.
  • the machine-readable media may be embodied in a computer-program product.
  • a software module may comprise a single instruction, or many instructions, and may be distributed over several different code segments, among different programs, and across multiple storage media.
  • the computer-readable media may comprise a number of software modules.
  • the software modules include instructions that, when executed by an apparatus such as a processor, cause the processing system to perform various functions.
  • the software modules may include a transmission module and a receiving module. Each software module may reside in a single storage device or be distributed across multiple storage devices.
  • a software module may be loaded into RAM from a hard drive when a triggering event occurs.
  • the processor may load some of the instructions into cache to increase access speed.
  • One or more cache lines may then be loaded into a general register file for execution by the processor.
  • any connection is properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared (IR) , radio, and microwave
  • the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium.
  • Disk and disc include compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , floppy disk, and disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers.
  • computer-readable media may comprise non-transitory computer-readable media (e.g., tangible media) .
  • computer-readable media may comprise transitory computer-readable media (e.g., a signal) . Combinations of the above should also be included within the scope of computer-readable media.
  • certain aspects may comprise a computer program product for performing the operations presented herein.
  • a computer program product may comprise a computer-readable medium having instructions stored (and/or encoded) thereon, the instructions being executable by one or more processors to perform the operations described herein.
  • modules and/or other appropriate means for performing the methods and techniques described herein can be downloaded and/or otherwise obtained by a user terminal and/or base station as applicable.
  • a user terminal and/or base station can be coupled to a server to facilitate the transfer of means for performing the methods described herein.
  • various methods described herein can be provided via storage means (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc. ) , such that a user terminal and/or base station can obtain the various methods upon coupling or providing the storage means to the device.
  • storage means e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc.
  • CD compact disc
  • floppy disk etc.
  • any other suitable technique for providing the methods and techniques described herein to a device can be utilized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Certains aspects de la présente divulgation concernent d'une façon générale des communications sans fil et, plus particulièrement, des procédés et appareil destinés à des communications efficaces et sécurisées de véhicule à tout (V2X).
PCT/CN2021/071409 2020-01-13 2021-01-13 Prévention de perte de message de certificat complet c-v2x pendant une régulation de congestion WO2021143711A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/CN2020/071677 WO2021142567A1 (fr) 2020-01-13 2020-01-13 Prévention de perte de message de certificat complet c-v2x pendant une régulation de congestion
CNPCT/CN2020/071677 2020-01-13

Publications (1)

Publication Number Publication Date
WO2021143711A1 true WO2021143711A1 (fr) 2021-07-22

Family

ID=76863434

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/CN2020/071677 WO2021142567A1 (fr) 2020-01-13 2020-01-13 Prévention de perte de message de certificat complet c-v2x pendant une régulation de congestion
PCT/CN2021/071409 WO2021143711A1 (fr) 2020-01-13 2021-01-13 Prévention de perte de message de certificat complet c-v2x pendant une régulation de congestion

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/071677 WO2021142567A1 (fr) 2020-01-13 2020-01-13 Prévention de perte de message de certificat complet c-v2x pendant une régulation de congestion

Country Status (1)

Country Link
WO (2) WO2021142567A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018029382A1 (fr) * 2016-08-12 2018-02-15 Telefonaktiebolaget Lm Ericsson (Publ) Systèmes et procédés de gestion de collisions entre des octrois de ressources semi-persistants multiples
US20180255558A1 (en) * 2015-08-19 2018-09-06 Lg Electronics Inc. V2x operation method performed by terminal in wireless communication system and terminal using same method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6828970B2 (ja) * 2016-08-12 2021-02-10 テレフオンアクチーボラゲット エルエム エリクソン（パブル） Ｄ２ｄにおけるリソースのインデックス付け
US10319236B2 (en) * 2017-08-07 2019-06-11 Denso International America, Inc. Efficient DSRC congestion control certification tool

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180255558A1 (en) * 2015-08-19 2018-09-06 Lg Electronics Inc. V2x operation method performed by terminal in wireless communication system and terminal using same method
WO2018029382A1 (fr) * 2016-08-12 2018-02-15 Telefonaktiebolaget Lm Ericsson (Publ) Systèmes et procédés de gestion de collisions entre des octrois de ressources semi-persistants multiples

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUAWEI, HISILICON: "Congestion Control for V2V", 3GPP DRAFT; R1-163337, vol. RAN WG1, 2 April 2016 (2016-04-02), Busan, Korea, pages 1 - 3, XP051080623 *

Also Published As

Publication number Publication date
WO2021142567A1 (fr) 2021-07-22

Similar Documents

Publication Publication Date Title
US11956122B2 (en) Vehicle to everything (V2X) centralized predictive quality of service (QoS)
EP3692701B1 (fr) Négociation et commande de caractéristiques de technologie d'accès radio (rat) de véhicule à tout (v2x)
US11265828B2 (en) Power allocation for sidelink feedback transmission
WO2021203293A1 (fr) Groupe de découverte de relais pour liaison latérale
US11564210B2 (en) Two stage control channel for peer to peer communication
WO2021231944A1 (fr) Relayage de ressources de canal physique de commande de liaison latérale
WO2021062144A1 (fr) Indication de réservation de ressource flexible dans une liaison latérale
WO2021203290A1 (fr) Bassin de découverte pour liaison latérale
EP3994900B1 (fr) Procédé et appareil destinés à un système de véhicule hybride à piéton
US20210289475A1 (en) Resource assignment and packet collision avoidance in sidelink communications
WO2021143711A1 (fr) Prévention de perte de message de certificat complet c-v2x pendant une régulation de congestion
WO2020191811A1 (fr) Mesure de temps de propagation de paquet par l'en-tête d'une unité de données de protocole (pdu)
US20220386271A1 (en) Sensing window configuration for sidelink based ranging and positioning
US11871379B2 (en) Techniques for enhanced resource sensing in sidelink communication
US20210195658A1 (en) Enabling coexistence between intelligent transportation system networks and unlicensed wireless local area networks
WO2020205975A1 (fr) Rétroaction améliorée pour communications poste à poste en multidiffusion

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21741053

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21741053

Country of ref document: EP

Kind code of ref document: A1