WO2017135580A1 - Procédé de commande de communication de véhicule à infrastructure routière et appareil associé - Google Patents

Procédé de commande de communication de véhicule à infrastructure routière et appareil associé Download PDF

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Publication number
WO2017135580A1
WO2017135580A1 PCT/KR2017/000025 KR2017000025W WO2017135580A1 WO 2017135580 A1 WO2017135580 A1 WO 2017135580A1 KR 2017000025 W KR2017000025 W KR 2017000025W WO 2017135580 A1 WO2017135580 A1 WO 2017135580A1
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WIPO (PCT)
Prior art keywords
terminal
information
base station
sps
carrier
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PCT/KR2017/000025
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English (en)
Korean (ko)
Inventor
홍성표
최우진
Original Assignee
주식회사 케이티
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
Priority claimed from KR1020160175028A external-priority patent/KR101984594B1/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Priority to CN201780009500.3A priority Critical patent/CN108605329B/zh
Priority to US16/075,593 priority patent/US10798723B2/en
Publication of WO2017135580A1 publication Critical patent/WO2017135580A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/10—Interfaces between hierarchically different network devices between terminal device and access point, i.e. wireless air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present disclosure relates to a method and an apparatus for supporting a vehicle communication based vehicle communication (V2X).
  • V2X vehicle communication based vehicle communication
  • V2X vehicle to everything
  • V2X forms include vehicle to vehicle (V2V), vehicle to infrastructure (V2I), vehicle to pedestrian (V2P), and are developed with the aim of increasing safety, driving convenience, and moving efficiency using vehicle communication. have.
  • Wireless communication resources are required for smooth vehicle communication, and development of wireless communication protocols for vehicle communication is also required.
  • commercialization has been carried out in many countries, and interest in vehicle communication using mobile communication technology deployed in a wide area of communication networks is increasing.
  • An embodiment of the present invention is to provide a radio resource scheduling method and apparatus capable of stably supporting vehicle communication even in a high-speed mobile situation based on a mobile communication technology (for example, LTE or LTE-Advanced).
  • a mobile communication technology for example, LTE or LTE-Advanced.
  • an embodiment is to provide a scheduling method and apparatus that can actively reflect the state of the terminal in the radio resource scheduling process for vehicle communication.
  • the base station in a method in which a terminal performs a vehicle to everything (V2X), provides terminal assistance information for semi-persistent scheduling (SPS) of a vehicle communication radio resource. And receiving the SPS configuration information generated using the terminal help information from the base station and performing vehicle communication using the SPS configuration information.
  • SPS semi-persistent scheduling
  • an embodiment is a method for a base station to control the vehicle (vehicle to everything (V2X)) of the terminal, the terminal help information for semi-persistent scheduling (Semi-Persistent Scheduling, SPS) of the vehicle communication radio resources from the terminal And generating SPS configuration information for vehicle communication of the terminal by using the terminal help information, and transmitting the SPS configuration information to the terminal.
  • V2X vehicle to everything
  • SPS semi-persistent Scheduling
  • a terminal for performing vehicle communication includes a transmitter and a base station for transmitting terminal assistance information for semi-persistent scheduling (SPS) of a vehicle communication radio resource to a base station. It provides a terminal device including a receiving unit for receiving the SPS configuration information generated using the terminal help information from the control unit for performing a vehicle communication using the SPS configuration information.
  • SPS semi-persistent scheduling
  • an embodiment is a base station for controlling a vehicle to the vehicle (vehicle to everything; V2X), the receiving unit for receiving the terminal assistance information for semi-persistent scheduling (SPS) of the vehicle communication radio resources from the terminal And a control unit for generating SPS configuration information for vehicle communication of the terminal using the terminal assistance information, and a transmitter for transmitting the SPS configuration information to the terminal.
  • V2X vehicle to everything
  • SPS semi-persistent scheduling
  • the above-described embodiments of the present invention can effectively provide sidelink-based vehicle communication using a vehicle communication dedicated carrier, can prevent unnecessary waste of radio resources required for radio resource scheduling for vehicle communication, and improve the state of the terminal. By reflecting, it provides the effect of efficiently performing radio resource scheduling.
  • FIG. 1 illustrates an example of a V2X communication scenario according to an embodiment.
  • FIG. 2 is a diagram illustrating another example of a V2X communication scenario according to an embodiment.
  • FIG. 3 illustrates another example of a V2X communication scenario according to an embodiment.
  • FIG. 4 is a signal diagram exemplarily illustrating operations of a terminal and a base station according to an embodiment.
  • FIG. 5 is a signal diagram exemplarily illustrating operations of a terminal and a base station according to another embodiment.
  • FIG. 6 is a flowchart illustrating an operation of a terminal according to an exemplary embodiment.
  • FIG. 7 is a flowchart illustrating an operation of a base station according to an embodiment.
  • FIG. 8 is a diagram illustrating an example of a terminal configuration.
  • FIG. 9 is a diagram illustrating a configuration of a base station according to an embodiment.
  • the MTC terminal may mean a terminal supporting low cost (or low complexity) or a terminal supporting coverage enhancement.
  • the MTC terminal may mean a terminal supporting low cost (or low complexity) and coverage enhancement.
  • the MTC terminal may mean a terminal defined in a specific category for supporting low cost (or low complexity) and / or coverage enhancement.
  • the MTC terminal may mean a newly defined 3GPP Release-13 low cost (or low complexity) UE category / type for performing LTE-based MTC related operations.
  • the MTC terminal supports enhanced coverage compared to the existing LTE coverage, or supports UE category / type defined in the existing 3GPP Release-12 or lower, or newly defined Release-13 low cost (or lower power consumption).
  • low complexity can mean UE category / type.
  • the wireless communication system in the present invention is widely deployed to provide various communication services such as voice, packet data, and the like.
  • the wireless communication system includes a user equipment (UE) and a base station (base station, BS, or eNB).
  • a user terminal is a generic concept meaning a terminal in wireless communication.
  • user equipment (UE) in WCDMA, LTE, and HSPA, as well as mobile station (MS) in GSM, user terminal (UT), and SS It should be interpreted as a concept that includes a subscriber station, a wireless device, and the like.
  • a base station or a cell generally refers to a station that communicates with a user terminal, and includes a Node-B, an evolved Node-B, an Sector, a Site, and a BTS.
  • Other terms such as a base transceiver system, an access point, a relay node, a remote radio head (RRH), a radio unit (RU), and a small cell may be called.
  • RRH remote radio head
  • RU radio unit
  • a base station or a cell is a generic meaning indicating some areas or functions covered by a base station controller (BSC) in CDMA, a Node-B in WCDMA, an eNB or a sector (site) in LTE, and the like. It should be interpreted as, and it is meant to cover all the various coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node, RRH, RU, small cell communication range.
  • BSC base station controller
  • the base station may be interpreted in two senses. i) the device providing the megacell, the macrocell, the microcell, the picocell, the femtocell, the small cell in relation to the wireless area, or ii) the wireless area itself. In i) all devices which provide a given wireless area are controlled by the same entity or interact with each other to cooperatively configure the wireless area to direct the base station.
  • the base station may indicate the radio area itself to receive or transmit a signal from a viewpoint of a user terminal or a neighboring base station.
  • megacells macrocells, microcells, picocells, femtocells, small cells, RRHs, antennas, RUs, low power nodes (LPNs), points, eNBs, transmit / receive points, transmit points, and receive points are collectively referred to as base stations. do.
  • the user terminal and the base station are two transmitting and receiving entities used to implement the technology or technical idea described in this specification in a comprehensive sense and are not limited by the terms or words specifically referred to.
  • the user terminal and the base station are two types of uplink or downlink transmitting / receiving subjects used to implement the technology or the technical idea described in the present invention, and are used in a generic sense and are not limited by the terms or words specifically referred to.
  • the uplink (Uplink, UL, or uplink) refers to a method for transmitting and receiving data to the base station by the user terminal
  • the downlink (Downlink, DL, or downlink) means to transmit and receive data to the user terminal by the base station It means the way.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • OFDM-FDMA OFDM-TDMA
  • OFDM-CDMA OFDM-CDMA
  • One embodiment of the present invention can be applied to resource allocation in the fields of asynchronous wireless communication evolving to LTE and LTE-Advanced through GSM, WCDMA, HSPA, and synchronous wireless communication evolving to CDMA, CDMA-2000 and UMB.
  • the present invention should not be construed as being limited or limited to a specific wireless communication field, but should be construed as including all technical fields to which the spirit of the present invention can be applied.
  • the uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.
  • TDD time division duplex
  • FDD frequency division duplex
  • a standard is configured by configuring uplink and downlink based on one carrier or a pair of carriers.
  • the uplink and the downlink include a Physical Downlink Control CHannel (PDCCH), a Physical Control Format Indicator CHannel (PCFICH), a Physical Hybrid ARQ Indicator CHannel (PHICH), a Physical Uplink Control CHannel (PUCCH), an Enhanced Physical Downlink Control CHannel (EPDCCH), and the like.
  • Control information is transmitted through the same control channel, and data is configured by a data channel such as a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH).
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink shared channel
  • control information may also be transmitted using an enhanced PDCCH (EPDCCH or extended PDCCH).
  • EPDCCH enhanced PDCCH
  • extended PDCCH extended PDCCH
  • a cell means a component carrier having a coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be.
  • a wireless communication system to which embodiments are applied may be a coordinated multi-point transmission / reception system (CoMP system) or a coordinated multi-antenna transmission scheme in which two or more transmission / reception points cooperate to transmit a signal.
  • antenna transmission system a cooperative multi-cell communication system.
  • the CoMP system may include at least two multiple transmission / reception points and terminals.
  • the multiple transmit / receive point is at least one having a base station or a macro cell (hereinafter referred to as an eNB) and a high transmission power or a low transmission power in a macro cell region, which is wired controlled by an optical cable or an optical fiber to the eNB. May be RRH.
  • an eNB a base station or a macro cell
  • a high transmission power or a low transmission power in a macro cell region which is wired controlled by an optical cable or an optical fiber to the eNB. May be RRH.
  • downlink refers to a communication or communication path from a multiple transmission / reception point to a terminal
  • uplink refers to a communication or communication path from a terminal to multiple transmission / reception points.
  • a transmitter may be part of multiple transmission / reception points, and a receiver may be part of a terminal.
  • a transmitter may be part of a terminal, and a receiver may be part of multiple transmission / reception points.
  • a situation in which a signal is transmitted and received through a channel such as a PUCCH, a PUSCH, a PDCCH, an EPDCCH, and a PDSCH may be described in the form of 'sending and receiving a PUCCH, a PUSCH, a PDCCH, an EPDCCH, and a PDSCH.
  • a description of transmitting or receiving a PDCCH or transmitting or receiving a signal through the PDCCH may be used as a meaning including transmitting or receiving an EPDCCH or transmitting or receiving a signal through the EPDCCH.
  • the physical downlink control channel described below may mean PDCCH or EPDCCH, and may also be used to include both PDCCH and EPDCCH.
  • the EPDCCH which is an embodiment of the present invention, may be applied to the portion described as the PDCCH, and the EPDCCH may be applied to the portion described as the EPDCCH as an embodiment of the present invention.
  • high layer signaling described below includes RRC signaling for transmitting RRC information including an RRC parameter.
  • the eNB performs downlink transmission to the terminals.
  • the eNB includes downlink control information and an uplink data channel (eg, a physical downlink shared channel (PDSCH), which is a primary physical channel for unicast transmission, and scheduling required to receive the PDSCH.
  • a physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission on a physical uplink shared channel (PUSCH) may be transmitted.
  • PUSCH physical uplink shared channel
  • LTE Long-Term Evolution
  • LTE-A Long-Term Evolution-Advanced
  • HSDPA high speed downlink packet access
  • HSUPA high speed uplink packet access
  • 3GPP2 Third Generation Partnership Project
  • a high rate packet data (HRPD) mobile communication system, a 3GPP2 wideband code division multiple access (WCDMA) mobile communication system, and a 3GPP2 code division multiple access CDMA) mobile communication system, Institute of Electrical and Electronics Engineers (IEEE) 802.16m communication system, and evolved packet system System (EPS) and Mobile Internet Protocol (Mobile Internet Protocol: Mobile IP) system and the like can be applied to various communication systems.
  • HRPD high rate packet data
  • WCDMA wideband code division multiple access
  • CDMA Code division multiple access CDMA
  • IEEE Institute of Electrical and Electronics Engineers
  • EPS evolved packet system System
  • Mobile Internet Protocol Mobile Internet Protocol: Mobile IP
  • the terminal in a high-speed mobile situation of the terminal in general It may also be applied to fields in which intercommunication techniques (eg, sidelink communication) are required.
  • intercommunication techniques eg, sidelink communication
  • the various embodiments described herein are described separately, various embodiments may be implemented in combination unless the embodiments are expressly inconsistent with each other or conflict.
  • the terminal described below is an object capable of supporting the Internet of Things or V2X communication, and may be, for example, an in-vehicle communication device or a smart phone. In the present specification, an object supporting V2X communication is described as "terminal", "V2X device" or "vehicle”.
  • V2X communication is a technology for performing direct communication between terminals and may be included in sidelink direct communication in a wide range. Therefore, the following briefly describes the sidelink direct communication to which the embodiments can be applied.
  • the RRC CONNECTED terminal When interested in sidelink communication, the RRC CONNECTED terminal sends a sidelink terminal information message to the base station. In response, the base station may configure a sidelink RNTI in the terminal.
  • the terminal Whenever the terminal detects a cell on the public disaster Prose carrier, the terminal is considered to be in-coverage for Prose direct communication.
  • the following rules apply to the terminal.
  • the terminal Whenever the terminal detects a cell on the public disaster Prose carrier, the terminal is considered to be in-coverage for Prose direct communication.
  • the following rules apply to the terminal.
  • the terminal may use only autonomous resource selection.
  • scheduled resource allocation or autonomous resource selection may be used according to the base station configuration.
  • the lower layer is configured to transmit sidelink control information and corresponding data using the indicated resources in the resource pool.
  • the resource allocation mode indicated by the base station configuration should be used unless it is an exceptional case specified in the RRC (for example, the exceptional case described in the 3GPP TS 36.331 document).
  • the terminal is configured to use scheduled resource allocation, if an exceptional case such as a radio link failure occurs, the terminal may be allowed to temporarily use the terminal autonomous resource selection.
  • the resource pool to be used during this exceptional case may be provided by the base station.
  • a terminal that is camped on or connected to one carrier frequency but interested in direct communication with another on another carrier frequency may seek to locate a cell on a public disaster Prose carrier (hereinafter referred to as a Prose carrier for convenience of description). You must try.
  • a Prose carrier for convenience of description.
  • the RRC_IDLE UE within the coverage area of the E-UTRA cell on the Prose carrier may consider the Prose carrier as the highest priority. Reselect with Prose carrier.
  • the RRC_CONNECTED terminal serviced by a cell in another carrier frequency may send Prose direct communication indication information to the serving cell when it wants to perform Prose direct communication.
  • the indication information includes information on the intended Prose carrier.
  • the serving cell indicates whether the UE allows the UE to send a Prose UE information message through the presence of SIB 18 (System Information Block 18).
  • SIB 18 System Information Block 18
  • the serving cell may configure inter-frequency RRM measurement on the Prose carrier.
  • the base station When the UE enters cell coverage on the Prose carrier, the base station performs inter-frequency mobility on the Prose carrier based on the measurement report.
  • the UE may perform sidelink communication using UE autonomous resource selection from the resource pool broadcast by the E-UTRA cell detected on the ProSe carrier. have.
  • the UE may use a public disaster Prose resource pre-configured in the UICC or ME for direct communication out of coverage.
  • the UE stops using the resources pre-configured in the UICC or ME.
  • the UE may perform sidelink communication using UE autonomous resource selection from the resource pool broadcast by the E-UTRA cell detected on the ProSe carrier.
  • V2X communication will be described as an example of side link communication.
  • V2X Vehicle to Everything
  • V2I Vehicle to Infrastructure
  • V2P Pedestrian
  • V2D Device to Device
  • LTE Long Term Evolution
  • V2X has various use cases and requirements, and the way of applying LTE-based V2X can be deployed in various scenarios. Therefore, when applying the V2X using the conventional LTE technology, there may be a problem in detail.
  • sidelink communication / discovery / synchronization resource configuration is applied for the frequency at which it was received or obtained.
  • the sidelink communication / discovery / synchronization resource configuration provided by dedicated signaling is applied to the primary cell (PCell) or primary frequency (The sidelink communication / discovery).
  • synchronization resource configuration applies for the frequency at which it was received / acquired.
  • the sidelink communication / discovery / synchronization resource configuration provided by dedicated signaling applied for the PCell / the primary frequency
  • the V2X service may be applied to more terminals having higher mobility than the Prose service.
  • a large terminal that wants to use a V2X carrier may be located in a specific region, and the hidden node problem may be more serious due to mobility. This can cause higher system loads and interference. Therefore, in case of a terminal providing a V2X service, it is preferable to perform communication through scheduled resource allocation as compared to autonomous resource allocation.
  • V2X carrier other than the PCell to which the UE is connected may use only autonomous resource allocation or for another V2X carrier other than the PCell to which the UE is connected.
  • V2X configuration must be received through the corresponding V2X carrier.
  • the V2X communication may provide a service in the scenario as shown in FIGS. 1 to 3.
  • FIG. 1 illustrates an example of a V2X communication scenario according to an embodiment. Description of each scenario of FIG. 1 is as follows.
  • Scenario 1 The UE leaves the V2X carrier.
  • Scenario 2 The V2X carrier is authorized to a single operator and the terminal is within the coverage of a single operator for V2X communication.
  • Scenario 3 The V2X carrier is shared by multiple operators, and the terminal is within operator's coverage for V2X communication.
  • Scenario 4 A V2X message is sent on a dedicated licensed frequency managed by each operator and received on all frequencies.
  • scenario 1 Since scenario 1 is out of coverage, the UE may use autonomous resource selection for preconfigured resources. Since scenario 2 is within coverage, the terminal may use scheduled resource allocation or autonomous resource selection according to the base station configuration.
  • Cell 1 represents a cell using another carrier that is not a V2X carrier.
  • Cell 2 represents a cell using a V2X carrier.
  • FIG. 3 illustrates another example of a V2X communication scenario according to an embodiment. Assume a scenario where a macro cell / macrocell base station / macrocell base station cell (Cell 1) uses another carrier that is not a V2X carrier and the small cells (Cell 2 and Cell 3) use a V2X carrier.
  • Cell 1 uses another carrier that is not a V2X carrier and the small cells (Cell 2 and Cell 3) use a V2X carrier.
  • the UE performs V2X communication using a V2X carrier.
  • the terminal must be allocated a radio resource including a V2X carrier. That is, since V2X communication using mobile communication technology uses limited radio resources, it is necessary to be allocated sidelink resources for V2X communication.
  • the present embodiments devised to solve this problem are to provide a resource allocation and V2X communication control method for efficient V2X communication based on LTE.
  • V2X operation meaning at least one of V2V / sidelink, sidelink direct communication, discovery, and synchronization signal transmission, and hereinafter referred to as V2X operation for convenience of description
  • the base station may control a parameter that affects the terminal resource selection. Since the PCell carrier and the V2X carrier represent the same case, the base station may use scheduled resource allocation or autonomous resource selection because the terminal is in coverage as in the prior art.
  • the base station is a terminal.
  • the V2X service can be applied to more terminals with higher mobility than the Prose service.
  • a large terminal that wants to use a V2X carrier may be located, and a hidden node problem due to mobility may be more serious. This can cause higher system loads and interference.
  • the base station may control resource allocation of the terminal. For example, when a specific operator is assigned to different Uu carriers and PC5 carriers, it may not need to send uplink traffic through the PC5 carrier because uplink traffic can be sent to the base station via the Uu carrier.
  • V2X carriers can be made to transmit and receive based on Uu carrier timing or value based offset using Uu carrier timing, or based on UTC or GNSS or GNSS-equivalent timing. In this case, it may not be necessary to constantly operate downlink transmission for a dedicated carrier for the corresponding V2X.
  • a method for providing the same will be described.
  • the UE does not detect any cell in the V2X carrier, it is out of V2X carrier coverage, or if the base station does not operate a downlink carrier for (user) data transmission from the base station, or the Uu downlink carrier at the base station It may mean that the configuration information for the V2X carrier through, or simply using a V2X-only carrier or when using a V2X-only carrier that is distinct from the Uu carrier, but for convenience of description the terminal is not The case where a cell is not detected is indicated. Contents included in the present invention may be implemented assuming one or more of the above-described cases. The contents described below for each case are included in the scope of the present invention.
  • the V2V carrier, side link carrier, or V2X carrier means radio resources or carriers allocated for vehicle communication, and means frequency resources.
  • the V2V carrier, the sidelink carrier and the V2X carrier will be described as V2X carriers.
  • V2V carriers or sidelink carriers may be used as needed.
  • Radio resources for V2X communication may be dynamically allocated, autonomously selected, or allocated according to semi-permanent scheduling.
  • the base station may use the scheduled resource allocation for the V2X carrier.
  • the base station is configured to provide a dynamic resource of a V2X carrier (on a V2X carrier or of a V2X carrier frequency resource) through a cell / PCell / macrocell in which the terminal uses another frequency (via RRC signaling).
  • Information for indicating allocation (or information for instructing the RRC_IDLE terminal to start an RRC connection) can be delivered to the terminal.
  • the V2X transmission resource / V2X carrier is caused by the cell.
  • Information configured to be scheduled may be delivered to the terminal.
  • the above-described vehicle communication resource allocation information may include information for configuring a terminal to receive a V2X carrier through a cell to which the terminal belongs.
  • the MAC entity for the transmission on the sidelink shared channel (SL-SCH) to the sidelink grant Should have Alternatively, a scheduled resource, a dynamic scheduled resource, or a semi-permanent scheduling resource may be used according to a sidelink grant.
  • a sidelink buffer state report (BSR) of the terminal is triggered.
  • the sidelink buffer status report is used to provide the serving base station with information about the amount of sidelink data available for transmission in the sidelink buffer of the MAC entity.
  • the terminal sends a scheduling request (D-SR or random access) followed by the sidelink BSR to the base station.
  • D-SR scheduling request
  • the base station may determine that the terminal has data for sidelink communication, and estimate a resource necessary for transmission.
  • the base station may schedule transmission resources for sidelink communication using the configured sidelink RNTI.
  • the BSR for the V2X communication may be delivered to the base station through the serving cell.
  • the BSR for V2X communication may include a field for distinguishing buffer size information of data transmission through a V2X carrier.
  • the base station may recognize the buffer size information of the data transmission through the V2X carrier through field information included in the BSR.
  • the BSR format for the V2X operation may include a field for distinguishing the buffer size through the V2X service on the V2X carrier. Through this, the base station can know the information about the specific V2X data amount to be transmitted by the terminal through the V2X carrier.
  • the MAC entity uses the received sidelink grant to determine the set of subframes in which the Sidelink Control Information (SCI) transmission and the transmission of the first transmission block occur.
  • the MAC entity may consider the received sidelink grant as a configured sidelink grant occurring in a subframe beginning at the beginning of the first available SC period starting at least 4 subframes after the subframe in which the sidelink grant was received.
  • the MAC entity removes the configured sidelink grants at the end of the corresponding SC period.
  • the above-described sidelink grant determines or limits information, sidelink transmission synchronization, or timing for distinguishing a V2X carrier from a cell (for example, a PCell or a macrocell) that uses a frequency other than a serving cell or a V2X carrier.
  • Information may include one or more pieces of information for indicating a semi-persistent resource allocation activation or reactivation or release through the V2X carrier.
  • the terminal must perform a synchronization process for V2X communication. Synchronization for V2X communication can be established using various synchronization sources.
  • the UE may use a transmission resource received from a cell (eg, a PCell / serving cell) using another carrier that is not a V2X carrier and use another carrier that is not the V2X carrier. Communication through a V2X carrier with the timing of the cell). As another example, the UE performs communication through a V2X carrier with a timing of a synchronization source to transmit a transmission resource received from a cell (eg, a PCell / serving cell) using another carrier other than the V2X carrier through the V2X carrier. can do.
  • the UE autonomously selects a timing based on a transmission resource received from a cell using another carrier other than the V2X carrier (for example, a PCell / serving cell) to perform communication through the V2X carrier.
  • a transmission resource received from a cell for example, a PCell / serving cell
  • the terminal may include timing information (offset) included in the transmission resource information received from the base station. The timing can be selected to enable communication over the V2X carrier.
  • the terminal may perform a V2X operation through the V2X carrier using GNSS (or GNSS-equivalent synchronization source, GPS, GLONASS, BDS, GALILEO, etc., for the sake of explanation).
  • GNSS or GNSS-equivalent synchronization source, GPS, GLONASS, BDS, GALILEO, etc., for the sake of explanation).
  • the base station may instruct the terminal to configure synchronization for PC2 based V2X during base station based synchronization and GNSS synchronization. For example, when the terminal is in a carrier operating on the sidelink based V2X, the base station may indicate the priority for the terminal base station-based synchronization or GNSS synchronization. For another example, the base station may allow the terminal to perform V2X operations in accordance with GNSS synchronization. In another example, when no cell is detected within the V2X carrier, but the terminal is in another cell coverage other than the V2X carrier, the base station may allow the terminal to perform V2X operation in accordance with GNSS synchronization.
  • the terminal may set synchronization timing using base station based time synchronization or GNSS based time synchronization.
  • information for indicating dynamic resource allocation for V2X carrier resources (or information for instructing the RRC_IDLE UE to start an RRC connection for this purpose) is provided. It may broadcast through system information (eg, SystemInformationBlockType18 ) of a cell (eg, PCell) using another carrier other than the V2X carrier.
  • system information eg, SystemInformationBlockType18
  • the terminal is a transmission resource pool (for example, dynamic resource allocation) to be used by the terminal to perform V2X communication through the system information of the cell using another carrier other than the V2X carrier
  • the terminal is configured to transmit V2X / sidelink communication by higher layer and the relevant data is available for transmission: if the above-mentioned system information is broadcast by the cell the terminal camped on; If the aforementioned system information includes information indicating RRC connection start, the RRC connection can be started. Or if the terminal is configured to transmit V2X / sidelink communication by a higher layer and related data is available for transmission: if the above-mentioned system information is broadcast by a cell on which the terminal camps; If the above-mentioned system information common common transmission resource pool (for example, commTxPoolNormalCommon ) is not included, the RRC connection can be started.
  • the above-mentioned system information is broadcast by the cell the terminal camped on; If the aforementioned system information includes information indicating RRC connection start, the RRC connection can be started. Or if the terminal is configured to transmit V2X / sidelink communication by a higher layer and related data is available for transmission: if the above-menti
  • a base station may configure cross-carrier scheduling to perform dynamic resource allocation for a terminal having an RRC connection using a cell other than a V2X carrier as a PCell.
  • cross-carrier scheduling will be briefly described.
  • the base station may use the scheduled resource allocation for the V2X carrier.
  • the base station may allocate dynamic resources of a V2X carrier (on a V2X carrier or of a V2X carrier frequency resource) through a cell / PCell / macrocell whose terminal uses another frequency (via RRC) rather than the V2X carrier.
  • related indication information may be delivered to the terminal.
  • the cross carrier scheduling scheme is applied only to the secondary cell provided through carrier aggregation. That is, by assigning scheduling cell identification information to a specific secondary cell, scheduling (resource allocation information) for the secondary cell is performed through the assigned scheduling cell (eg, PCell or another serving cell). For example, the base station may add a corresponding cell based on measurement reporting reported by the UE to discover or measure a V2X carrier and designate a cell to schedule the cell as a cell other than the V2X carrier (PCell).
  • the assigned scheduling cell eg, PCell or another serving cell.
  • the base station may add a corresponding cell based on measurement reporting reported by the UE to discover or measure a V2X carrier and designate a cell to schedule the cell as a cell other than the V2X carrier (PCell).
  • the terminal does not need to add and use the V2X carrier like a normal secondary cell.
  • the terminal does not need to activate or deactivate the cell on the V2X carrier to use the cell on the V2X carrier.
  • the terminal does not need to receive downlink control information / user data through the cell on the V2X carrier and does not need to perform channel state reporting on it.
  • the base station may designate a cell for indicating resource allocation information through PDCCH / EPDCCH through a cross-carrier scheduling configuration, and may instruct the terminal to perform V2X operation by indicating resource allocation information (e.g. DCI) through the corresponding cell.
  • resource allocation information e.g. DCI
  • the base station may enable the terminal to recognize the V2X carrier separately from the normal secondary cell (or the carrier for the normal secondary cell).
  • the base station transmits V2X to system information transmitted through a cell (eg PCell) of another carrier other than the V2X carrier. It may be to include the frequency information of the carrier.
  • the base station adds uplink carrier frequency on a system information 2 transmitted through a cell of another carrier other than the V2X carrier (eg PCell) to uplink frequency information of a cell other than the V2X carrier, in addition to the uplink frequency information of the V2X carrier.
  • Information may be added (by adding only V2X carriers for FDD and for TDD).
  • the uplink carrier frequency broadcast over system information 2 is a value defined from the default TX-RX frequency separation defined in TS36.101, if absent for FDD, and for TDD this parameter is absent and down.
  • FDD If absent, the (default) value determined from the default TX-RX frequency separation defined in TS 36.101 [42, table 5.7.3-1] applies.
  • TDD This parameter is absent and it is equal to the downlink frequency).
  • V2X operations can be performed through cross-carrier scheduling while using downlink transmission on a cell other than the V2X carrier.
  • the base station is configured to transmit the uplink control information (eg, PUCCH) or uplink data information (PUSCH) that is generated due to V2X resource allocation through cross-carrier scheduling, rather than a V2X carrier (PCell or other serving cell).
  • Information to instruct to transmit through the can be transmitted to the terminal. This may be broadcasted through system information or indicated through terminal-specific signaling.
  • the base station may use an uplink PUCCH cell linked to / linked to a scheduling cell through crosscarrier scheduling as a feedback cell for a scheduling grant of a corresponding V2X carrier.
  • transmission of control information related to activation or deactivation of the semi-persistent scheduling may be transmitted through the serving cell rather than the V2X carrier.
  • feedback (ACK / NACK) on the scheduling information may be transmitted through an uplink cell linked / linked to the scheduling cell.
  • the above-described embodiments of the cross carrier scheduling may be used when the terminal detects a cell in the V2X carrier, but the terminal adds the V2X carrier as the secondary cell when the terminal is in another cell coverage other than the V2X carrier. have.
  • the UE when the UE is located where another cell coverage other than the V2X carrier and the V2X carrier cell coverage overlap, the UE which has established the RRC connection using another cell other than the V2X carrier as the PCell is the secondary cell of the V2X carrier. Can also be used to add as (or another additional cell other than the normal secondary cell).
  • the SPS could only be configured for the PCell (or PSCell).
  • the SPS is not applied because the semi-permanent scheduling is complicated because the cell is not always activated.
  • the base station may configure the SPS through the V2X dedicated carrier.
  • V2X dedicated carriers can be used for V2X operations, unlike ordinary secondary cells as described above. Meanwhile, the contents described below may allow the base station to configure the SPS through the V2X carrier even when the terminal shares the Uu interface carrier between the V2X interface (PC5) carrier and the terminal and the base station.
  • the base station may include information for configuring the SPS on the V2X carrier through the RRC message to the terminal.
  • the base station may transmit the SPS configuration information to the terminal to configure the SPS to the terminal.
  • the above-described RRC message may include interval information to which radio resources are periodically allocated.
  • the base station may include information included in the V2X control information through the PHY signaling (PDCCH / EPDCCH) in the SPS configuration information and transmit the information through the RRC message.
  • the RRC message includes group destination identifier information, modulation and coding scheme information, resource block allocation information, hopping resource allocation information, frequency hopping flag, timing advance, offset information of base station timing and V2X transmission timing, and PDCCH reception timing of a terminal.
  • at least one of offset information for synchronization based on an absolute value, information indicating to match GNSS-based timing, information indicating whether to override the SPS priority, and V2X buffer status information may be included.
  • Radio resources can be used.
  • radio resources indicated by dynamic scheduling may be used.
  • the terminal uses the radio resource configured by the SPS and radio indicated by dynamic scheduling in the corresponding subframe.
  • the resource may not be used.
  • radio resources indicated by dynamic scheduling may not be used.
  • the base station may transmit information for instructing such an operation to the terminal when configuring the SPS in the terminal.
  • the terminal may transmit the terminal help information for the SPS to the base station.
  • the terminal may transmit help information on the SPS interval (interval) to the base station.
  • V2X can transmit data with different traffic characteristics and different QoS requirements. For example, pre-crash sensing warning with strict 20 ms delay requirement, forward collision warning / queue warning with 100 ms delay requirement, and cooperative adaptive cruise control information with 1 second delay requirement can be transmitted.
  • the terminal may periodically transmit information such as the current position, speed, acceleration of the terminal. The period for this information may vary depending on terminal density, traffic, application used, or the like, or depending on the configuration provided by the operator.
  • the terminal may change the transmission period or may have a plurality of periods according to a period configured by a higher layer (eg, a service or an application entity) or according to an indication of a V2X service server / platform / application. Therefore, it may be desirable for the information transmission / reception period or higher layer of the terminal to set the SPS using the request. To this end, the terminal may transmit the terminal help information to the base station.
  • the terminal may transmit the terminal help information that may be used when the base station determines the SPS configuration and delivers it to the terminal.
  • the core network entity / MME / HSS / V2X service server / platform may deliver the terminal assistance information to the base station.
  • the transmission of the terminal help information may be triggered in the case of receiving the help information indicated in the upper layer, a V2X resource allocation request, or a change of the SPS interval.
  • the core network entity / MME / HSS / V2X service server / platform delivers the terminal assistance information to the base station via the S1 interface.
  • the aforementioned terminal help information may be delivered in various forms.
  • the terminal help information may be transmitted through an RRC message (eg, a terminal information message or a V2X terminal information message).
  • the terminal help information may be provided through MAC signaling (for example, V2X BSR or MAC CE with a new LCID value).
  • the terminal help information may be indicated through PHY signaling.
  • the terminal help information may include various information that may be used by the base station to configure the SPS.
  • the terminal help information related to the SPS configuration may include SPS interval information proposed by the terminal, timing offset information proposed by the terminal, V2X quality measurement information measured by the terminal, V2X collision information measured by the terminal, and V2X received by the terminal. It may include at least one information of the number of messages or V2X terminal, the number of V2X messages sent by the terminal, the interval of V2X messages sent by the terminal.
  • the terminal help information may be transmitted when at least one of a case in which an arrival estimation period of the packet through V2X is changed and a case where the arrival estimation offset of the packet through V2X is changed occurs.
  • the terminal help information may be transmitted to the base station after the SPS is configured in the terminal or before the SPS is configured.
  • the terminal may configure a plurality of SPS by receiving a plurality of SPS configuration information.
  • the terminal may configure uplink SPS processes of different intervals through a plurality of uplink SPS processes.
  • the plurality of SPS configuration information may include different SPS interval information as a parameter. That is, the terminal may configure a plurality of SPS intervals.
  • the terminal help information may be configured in the terminal by the base station.
  • the terminal may configure the terminal help information in the terminal by receiving the indication information for configuring the terminal help information from the base station to transmit to the base station.
  • configuring the terminal help information means storing and utilizing related information or parameters in the terminal so that the terminal can generate a terminal help information to check whether a trigger is performed and transmit a series of processes to the base station. That is, the terminal may configure the terminal help information transmission in the terminal by using the indication information received from the base station, and perform the configured terminal help information transmission operation when a specific condition occurs.
  • the terminal performs sidelink communication on a subframe defined during a sidelink control period.
  • the sidelink control period is the period over which resources allocated in a cell for sidelink control information and sidelink data transmissions occur.).
  • the terminal sends sidelink control information followed by sidelink data.
  • the sidelink control information indicates layer 1 ID and transmission characteristics.
  • the sidelink control period may have subframes 40, 80, 160, and 320 for the subframe FDD, and may have subframes 70, 140, 280, 60, 120, and 240 according to the TDD config for the TDD (SC period indicates).
  • the period over which resources are allocated in a cell for SC and over which scheduled and UE selected data transmissions occur see PSCCH period in TS 36.213 [23] .
  • Value in number of subframes.Value sf40 corresponds to 40 subframes
  • sf80 corresponds to 80 subframes and so on.
  • E-UTRAN configures values sf40, sf80, sf160 and sf320 for FDD and for TDD config 1 to 5, values sf70, sf140 and sf280 for TDD config 0, and finally values sf60, sf120 and sf240 for TDD config 6 .).
  • the semi-permanent interval had subframes 10, 20, 32, 40, 64, 80, 128, 160, 320, 640. Therefore, when the existing semi-permanent interval configuration is applied to the V2X, the V2X scheduling allocation period and the semi-permanent interval configuration period may be configured differently.
  • the base station may instruct the terminal by making the period of the semi-permanent interval and the V2X control period the same.
  • the terminal may be instructed to have the period of the semi-permanent interval as a multiple of the V2X control period.
  • the period of the semi-permanent interval may be instructed to the terminal in proportion to the integer value in the V2X control period.
  • the period of the semi-permanent interval can be instructed to the terminal by inversely proportional to the integer value (1 / n, n is an integer) in the V2X control period. This may be equally applied even when the terminal performs a V2X operation through the PCell.
  • the terminal may send HARQ ACK information to the base station.
  • the HARQ ACK may be transmitted through a cell transmitting a PUCCH associated with a scheduling cell.
  • the terminal may transmit information for requesting release of resource allocation for the SPS to the base station. For example, if the terminal continuously transmits a certain number of MAC PDUs not including MAC SDUs through V2X communication, or if the terminal does not transmit because there are no MAC PDUs to transmit a predetermined number or more through V2X communication, the terminal transmits to the base station to the SPS. Information for requesting the release of resource allocation may be delivered. This can be transmitted through the cell sending the PUCCH associated with the scheduling cell. The base station may transmit the confirmation information to the terminal.
  • an RRC_CONNECTED terminal serviced by a cell in another carrier frequency may send Prose direct communication indication information to a serving cell when it wants to perform Prose direct communication.
  • the indication information includes the intended Prose carrier.
  • the Prose direct communication indication information includes a sidelink terminal information message indicating a frequency of interest for the terminal to receive sidelink communication, a frequency of interest for the terminal to transmit sidelink communication, and a destination identified by the ProSe Layer 2 group identifier.
  • a sidelink terminal information message indicating a frequency of interest for the terminal to receive sidelink communication, a frequency of interest for the terminal to transmit sidelink communication, and a destination identified by the ProSe Layer 2 group identifier.
  • Table 1 commRxInterestedFreq Indicates the frequency on which the UE is interested to receive sidelink communication
  • commTxResourceReq Indicates the frequency on which the UE is interested to transmit sidelink communication as well as the sidelink communication transmission destination (s) for which the UE requests E-UTRAN to assign dedicated resources.
  • destinationInfoList Indicates the destination which is identified by the ProSe Layer-2 Group ID as specified in TS 23.303 [68].
  • the terminal help information may be delivered to the base station, the terminal help information may be delivered to the base station in various forms.
  • the terminal may send the above-described terminal help information to the V2X terminal information field.
  • the terminal may transmit additional information for indicating a V2X communication attribute in the V2X terminal information message.
  • the terminal may designate a specific field of the above-described sidelink terminal information field as a value mapped to the above-described terminal help information and transmit it to the base station.
  • the base station may generate the SPS configuration information based on the received terminal assistance information and transmit it to the terminal.
  • the terminal may perform V2X communication (or sidelink direct communication) with another terminal using the V2X carrier.
  • the base station should allocate resources for V2X communication to the terminal, the resource allocation is any one of dynamic resource allocation through dynamic scheduling, autonomous resource allocation that the terminal can select from pre-configured resources and resource allocation through semi-permanent scheduling It can be done in the manner of However, it may be desirable to allocate resources through semi-persistent scheduling (SPS) for waste of unnecessary control information and intervention of a certain level of resource allocation.
  • SPS semi-persistent scheduling
  • the terminal may generate the terminal help information and transmit the terminal help information to the base station for the SPS suitable for the state of the terminal. .
  • FIG. 4 is a signal diagram exemplarily illustrating operations of a terminal and a base station according to an embodiment.
  • the base station 402 may transmit, to the terminal 401, indication information indicating that the terminal 401 configures the terminal help information (S410). For example, the base station 402 may transmit the indication information for the terminal 401 to generate the terminal help information to deliver to the base station 402 under a predetermined condition.
  • the terminal 401 may configure the terminal help information based on the indication information (S420).
  • the terminal 401 configures the terminal help information by setting the terminal operation to the terminal 401 to generate the terminal help information under a predetermined condition and to transmit the information to the base station 401. Means that the configuration of the delivery form of the help information or the transmission conditions of the terminal help information and the like set on the terminal 401.
  • the terminal 402 may configure the terminal help information to activate the terminal help information transmission function or operation of the terminal 401.
  • the terminal 401 checks whether the transmission of the terminal help information is triggered (S430). For example, when the terminal help information transmission is received from the upper layer of the terminal 401, when the V2X resource allocation is requested, when the SPS interval is changed, the arrival of a data packet using V2X communication. It may be triggered by at least one of the case where the estimation period is changed and when the arrival estimation offset of the data packet using the V2X communication is changed.
  • the trigger of the terminal help information may be configured in various ways by setting.
  • the terminal 401 When the transmission of the terminal help information is triggered, the terminal 401 generates the terminal help information and transmits it to the base station 402 (S440).
  • the terminal help information includes SPS interval information proposed by the terminal 401, timing offset information proposed by the terminal 402, V2X quality measurement information measured by the terminal 401, and V2X measured by the terminal 401. It may include at least one of collision information, V2X message number or terminal number information received by the terminal 401, V2X message number information transmitted by the terminal 401, and V2X message interval information transmitted by the terminal 401. That is, the terminal help information may include V2X communication state information of the terminal 401, proposed SPS configuration information, and the like.
  • the base station 402 may generate the SPS configuration information to be configured in the terminal 401 using the received terminal assistance information (S450). For example, the base station 402 may check each information included in the terminal help information to generate the SPS configuration information suitable for the terminal 401 to perform V2X communication.
  • the base station 402 transmits the generated SPS configuration information to the terminal 401 (S460), and the terminal 401 configures the SPS using the received SPS configuration information to perform V2X communication using the allocated V2X radio resources. It may be performed (S470).
  • the terminal 401 transmits the terminal help information before the SPS is configured in the terminal. As described above, even when the SPS is configured in the terminal 401, the terminal 401 may transmit the terminal help information. The following describes the procedure when the SPS is configured with reference to FIG.
  • FIG. 5 is a signal diagram exemplarily illustrating operations of a terminal and a base station according to another embodiment.
  • the base station 402 may transmit the SPS configuration information to the terminal 401 for V2X communication of the terminal 401 (S510). If necessary, the base station 402 may transmit the indication information indicating the configuration of the terminal help information to the terminal 401 (S520).
  • the terminal 401 may configure the SPS and the terminal help information in the terminal 401 by using the received SPS configuration information and indication information (S530).
  • the indication information and the SPS configuration information may be transmitted simultaneously, or the indication information may be transmitted in advance than the SPS configuration information. That is, the steps S510 and S520 may be integrated or mutually changed as necessary.
  • the terminal 401 configures the SPS after step S510, and the indication information may be received after the SPS is configured in the terminal 401.
  • the terminal 401 checks whether the transmission of the terminal help information is triggered (S540). For example, when the terminal help information transmission is received from the upper layer of the terminal 401, when the V2X resource allocation is requested, when the SPS interval is changed, the arrival of a data packet using V2X communication. It may be triggered by at least one of the case where the estimation period is changed and when the arrival estimation offset of the data packet using the V2X communication is changed. In addition, the trigger of the terminal help information may be configured in various ways by setting.
  • the terminal 401 When the transmission of the terminal help information is triggered, the terminal 401 generates the terminal help information and transmits it to the base station 402 (S550).
  • the terminal help information includes SPS interval information proposed by the terminal 401, timing offset information proposed by the terminal 402, V2X quality measurement information measured by the terminal 401, and V2X measured by the terminal 401. It may include at least one of collision information, V2X message number or terminal number information received by the terminal 401, V2X message number information transmitted by the terminal 401, and V2X message interval information transmitted by the terminal 401. That is, the terminal help information may include V2X communication state information of the terminal 401, proposed SPS configuration information, and the like.
  • the base station 402 may change the SPS configuration information to be configured in the terminal 401 using the received terminal assistance information (S560). For example, the base station 402 may check each information included in the terminal help information and generate the changed SPS configuration information so that the terminal 401 is suitable for performing V2X communication.
  • the base station 402 transmits the changed SPS configuration information to the terminal 401 (S570), and the terminal 401 changes the SPS using the received SPS configuration information to perform V2X communication using the allocated V2X radio resource. It may be performed (S580).
  • FIG. 6 is a flowchart illustrating an operation of a terminal according to an exemplary embodiment.
  • a terminal performing vehicle communication may perform a step of transmitting terminal assistance information for semi-persistent scheduling (SPS) of a vehicle communication radio resource to a base station.
  • SPS semi-persistent scheduling
  • the terminal may transmit the terminal assistance information, which may be the basis for generating the SPS configuration information of the base station, to the base station.
  • the terminal help information includes SPS interval information proposed by the terminal, timing offset information proposed by the terminal, V2X quality measurement information measured by the terminal, V2X collision information measured by the terminal, the number of V2X messages received by the terminal, or the terminal.
  • the terminal may include at least one of the number information, the number of V2X messages transmitted by the terminal, and the V2X message interval information transmitted by the terminal. That is, the terminal help information may include V2X communication status information of the terminal, proposed SPS configuration information, and the like.
  • the terminal help information may be transmitted through any one of an RRC message, MAC signaling or physical layer signaling.
  • the terminal help information may be transmitted to the base station through a terminal information message, a V2X terminal information message, a V2X BSR, and the like.
  • the terminal may transmit the terminal help information to the base station.
  • the terminal help information transmission is received from the upper layer of the terminal, when the request for V2X resource allocation is requested, when the SPS interval is changed, the arrival estimation period of the data packet using the V2X communication is It may be triggered and transmitted by at least one of the case of the change and the case where the arrival estimation offset of the data packet using the V2X communication is changed.
  • the terminal help information may be transmitted before or after the terminal configures the SPS in the terminal. That is, both before and after the SPS is configured in the terminal can be transmitted.
  • the SPS may be configured in a multi-user terminal, in this case, the terminal help information may be set for each SPS and transmitted to the base station.
  • the terminal may transmit the terminal help information by receiving the instruction information instructing the terminal to configure the transmission of the terminal help information from the base station.
  • the terminal may perform the step of receiving the SPS configuration information generated using the terminal help information from the base station (S620).
  • the terminal receives the SPS configuration information from the base station, and the SPS configuration information may be information generated by the base station using the terminal help information transmitted by the terminal.
  • the base station may check each information included in the terminal help information to generate the SPS configuration information suitable for the terminal to perform V2X communication.
  • the SPS configuration information may be two or more, and when a plurality of SPS configuration information is received, each SPS configuration information may have a different parameter value.
  • the two or more SPS configuration information may include different SPS interval information as respective parameters.
  • the terminal may perform a step of performing vehicle communication using the SPS configuration information (S630).
  • the terminal may configure the SPS in the terminal by using the received SPS configuration information, and perform V2X communication with another terminal by using the V2X radio resources allocated according to the configured SPS.
  • the terminal may transmit the terminal help information to the base station even after the SPS is configured.
  • the terminal may additionally receive the SPS configuration information changed by the terminal help information to configure the changed SPS in the terminal.
  • FIG. 7 is a flowchart illustrating an operation of a base station according to an embodiment.
  • a base station for controlling vehicle to vehicle (V2X) of a terminal receives terminal assistance information for semi-persistent scheduling (SPS) of a vehicle communication radio resource from a terminal. It may be (S710).
  • the terminal help information includes SPS interval information proposed by the terminal, timing offset information proposed by the terminal, V2X quality measurement information measured by the terminal, V2X collision information measured by the terminal, the number of V2X messages received by the terminal, or the terminal.
  • the terminal may include at least one of the number information, the number of V2X messages transmitted by the terminal, and the V2X message interval information transmitted by the terminal. That is, the terminal help information may include V2X communication status information of the terminal, proposed SPS configuration information, and the like.
  • the terminal help information may be received through any one of the RRC message, MAC signaling or physical layer signaling.
  • the terminal help information may be received by the base station through a terminal information message, a V2X terminal information message, a V2X BSR, and the like.
  • the terminal help information may be received by the base station when the terminal help information transmission is triggered.
  • the terminal help information transmission is received from the upper layer of the terminal
  • the request for V2X resource allocation is requested
  • the SPS interval is changed
  • the arrival estimation period of the data packet using the V2X communication is It may be triggered by at least one of the case of the change and the case where the arrival estimate offset of the data packet using the V2X communication is changed, in which case the base station may receive.
  • the terminal assistance information may be received before or after the base station configures the SPS in the terminal. That is, both before and after the SPS is configured in the terminal can be received.
  • the SPS may be configured in a multi-user terminal, in this case, the terminal help information may be set and received for each SPS.
  • the base station may further transmit the indication information for configuring the terminal help information transmission to the terminal.
  • the terminal may configure the terminal help information transmission based on the indication information, and transmit the terminal help information to the base station according to the configured information.
  • the base station may perform the step of generating the SPS configuration information for vehicle communication of the terminal using the terminal help information (S720).
  • the base station may generate the SPS configuration information of the corresponding terminal by using the received terminal assistance information.
  • the SPS configuration information may be generated in plural. If the terminal help information is received after the SPS is configured in the terminal, the base station may generate the SPS configuration information for changing the SPS of the corresponding terminal by using the received terminal help information.
  • the base station may perform the step of transmitting the SPS configuration information to the terminal (S730).
  • the base station may transmit the generated or changed SPS configuration information to the terminal.
  • the SPS configuration information may be transmitted to the terminal through physical layer signaling or higher layer signaling.
  • the embodiments described above can effectively provide sidelink-based vehicle communication using a vehicle dedicated carrier, can prevent unnecessary waste of radio resources required for radio resource scheduling for vehicle communication, and state of a terminal. Reflecting this, it provides an effect of efficiently performing radio resource scheduling.
  • FIG. 8 is a diagram illustrating an example of a terminal configuration.
  • a terminal 800 that performs vehicle to everything may include a transmitter configured to transmit terminal assistance information for semi-persistent scheduling (SPS) of a vehicle communication radio resource to a base station. 820, a receiver 830 for receiving the SPS configuration information generated using the terminal assistance information from the base station, and a controller 810 for performing vehicle communication using the SPS configuration information.
  • SPS semi-persistent scheduling
  • the receiver 830 may receive indication information for configuring transmission of the terminal help information from the base station.
  • the receiver 830 may receive a plurality of SPS configuration information.
  • the controller 810 generates the terminal help information, checks whether or not to trigger the transmission of the terminal help information, and transmits the terminal help information to the base station, by using the received SPS configuration information generated based on the terminal help information By configuring the SPS, the overall operation of the terminal 800 necessary to perform vehicle communication is controlled.
  • the terminal help information includes SPS interval information proposed by the terminal, timing offset information proposed by the terminal, V2X quality measurement information measured by the terminal, V2X collision information measured by the terminal, the number of V2X messages received by the terminal, or the terminal.
  • the terminal may include at least one of the number information, the number of V2X messages transmitted by the terminal, and the V2X message interval information transmitted by the terminal.
  • the terminal help information may include V2X communication status information of the terminal, proposed SPS configuration information, and the like.
  • the terminal help information transmission is received from the upper layer of the terminal, when the V2X resource allocation is requested, when the SPS interval is changed, the arrival estimation period of the data packet using the V2X communication is changed. And the case where the arrival estimation offset of the data packet using the V2X communication is changed, it may be triggered and transmitted by at least one case.
  • the transmitter 820 may transmit terminal assistance information for each of the SPS configurations to the base station as necessary.
  • the transmitter 820 may transmit the terminal assistance information through one of an RRC message, MAC signaling, or physical layer signaling.
  • the terminal help information may be transmitted to the base station through a terminal information message, a V2X terminal information message, a V2X BSR, and the like.
  • the receiver 830 may receive downlink control information, data, and messages from the base station through a corresponding channel, and may receive data and signals from other terminals through vehicle communication.
  • the transmitter 820 may transmit uplink control information, data, and messages to the base station through a corresponding channel, and may transmit data and signals to other terminals through vehicle communication.
  • FIG. 9 is a diagram illustrating a configuration of a base station according to an embodiment.
  • the base station 900 for controlling a vehicle to vehicle (V2X) of the terminal receives terminal assistance information for semi-persistent scheduling (SPS) of vehicle communication radio resources from the terminal. It may include a control unit 910 for generating the SPS configuration information for vehicle communication of the terminal using the receiver 930 and the terminal help information, and a transmitter 920 for transmitting the SPS configuration information to the terminal.
  • SPS semi-persistent scheduling
  • the transmitter 920 may transmit the instruction information for configuring the transmission of the terminal help information to the terminal.
  • the transmitter 920 may transmit a plurality of SPS configuration information.
  • control unit 910 generates the SPS configuration information based on the terminal help information, and transmits the generated SPS configuration information to the terminal to operate the overall base station 900 required for instructing the resource allocation for vehicle communication of the terminal. To control.
  • the terminal help information includes SPS interval information proposed by the terminal, timing offset information proposed by the terminal, V2X quality measurement information measured by the terminal, V2X collision information measured by the terminal, V2X message number or terminal number information received by the terminal.
  • the terminal may include at least one of V2X message number information transmitted by the terminal and V2X message interval information transmitted by the terminal. That is, the terminal help information may include V2X communication status information of the terminal, proposed SPS configuration information, and the like.
  • the terminal assistance information is received when the terminal assistance information transmission is received from the upper layer of the terminal, when requesting the V2X resource allocation, when the SPS interval is changed, when the arrival estimation period of the data packet using the V2X communication is changed and It may be triggered by at least one of the cases where the arrival estimation offset of the data packet using the V2X communication is changed and may be received by the base station.
  • the receiver 930 may receive terminal help information for each of the SPS configurations as needed.
  • the receiver 930 may receive the terminal assistance information through any one of an RRC message, MAC signaling, or physical layer signaling.
  • the terminal help information may be received through a terminal information message, a V2X terminal information message, a V2X BSR, and the like.
  • the transmitter 920 and the receiver 930 are used to transmit and receive signals, messages, and data necessary for performing the above-described embodiments.

Abstract

La présente invention concerne un procédé et un appareil permettant de prendre en charge une communication de véhicule à infrastructure routière (V2X) reposant sur un réseau de communication mobile. Un mode de réalisation concerne un procédé et un appareil permettant de réaliser une communication de véhicule à infrastructure routière (V2X) au moyen d'un terminal de communication, le procédé comprenant les étapes consistant à : transmettre, à une station de base, des informations d'assistance de terminal pour une planification semi-persistante (SPS) de ressources radio en vue d'une communication V2X ; recevoir, en provenance de la station de base, des informations de configuration SPS générées à l'aide des informations d'assistance de terminal ; et effectuer une communication V2X à l'aide des informations de configuration SPS.
PCT/KR2017/000025 2016-02-04 2017-01-02 Procédé de commande de communication de véhicule à infrastructure routière et appareil associé WO2017135580A1 (fr)

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US16/075,593 US10798723B2 (en) 2016-02-04 2017-01-02 Vehicle to everything communication control method and apparatus therefor

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