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WO2020085523A1 - Dispositif de communication v2x et son procédé de transmission de service sa synchronisé - Google Patents

Dispositif de communication v2x et son procédé de transmission de service sa synchronisé Download PDF

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Publication number
WO2020085523A1
WO2020085523A1 PCT/KR2018/012556 KR2018012556W WO2020085523A1 WO 2020085523 A1 WO2020085523 A1 WO 2020085523A1 KR 2018012556 W KR2018012556 W KR 2018012556W WO 2020085523 A1 WO2020085523 A1 WO 2020085523A1
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WIPO (PCT)
Prior art keywords
service
transmitted
information
time
resource
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English (en)
Korean (ko)
Inventor
백종섭
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LG Electronics Inc
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LG Electronics Inc
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Priority to PCT/KR2018/012556 priority Critical patent/WO2020085523A1/fr
Publication of WO2020085523A1 publication Critical patent/WO2020085523A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to a method for transmitting a synchronized frequency aggregation (SA) spectrum service, and in particular, a contention-based medium access control (MAC) protocol such as carrier-sense multiple access with collision avoidance (CSMA / CA)
  • SA synchronized frequency aggregation
  • MAC contention-based medium access control
  • CSMA / CA carrier-sense multiple access with collision avoidance
  • V2X Vehicle to Everything
  • Connectivity can be implemented using various V2X communication technologies such as European ITS-G5, US WAVE, and NR (New Radio).
  • NR may include new inter-vehicle communication technologies developed in the future, including cellular V2X, such as LTE-V2X and 5G-V2X.
  • MCO multi-channel operation
  • an SA (Spectrum Aggregation) service transmission method comprises: transmitting SA service reservation information for communication resource reservation for SA service provision; Mapping SA service data and the communication resource based on the SA service reservation information, wherein the communication resource includes a frequency resource and a time resource, and transmitting SA service data through the frequency resource and the time resource Including, the SA service reservation information is transmitted to a control channel or a service channel, and the SA service data corresponds to one service and is transmitted through a plurality of channels.
  • the SA service reservation information includes at least one of frequency resource information to which the SA service is transmitted, time resource information to which the SA service is transmitted, and length information of the SA service.
  • the frequency resource information indicates a plurality of service channels
  • the time resource information indicates a time slot in which the SA service data is transmitted
  • the length information is the length of a time period in which the SA service data is transmitted. Can instruct.
  • the SA service data is divided into a plurality of channels and mapped, and the divided SA service data has the same PSID or the same service length.
  • the SA service reservation information when the SA service reservation information is transmitted to the service channel, the SA service reservation information may be transmitted during a service period.
  • the service interval includes a time slot for an SA service and a time slot for a non-SA service, and the time slot for the SA service transmits the SA service data It may include a first time sub-slot for.
  • the time slot for the SA service may further include a second time sub-slot for transmitting a non-SA service when the SA service is not transmitted.
  • SA service can be provided in a contention-based V2X communication system, thereby increasing the throughput of the system. That is, transmission and reception of SA service data is possible in a contention-based environment by transmitting service reservation information and resource mapping and data accordingly. In addition, since this operation is performed within a predetermined time period and time slot, it may not interfere with the performance of other V2X communication.
  • FIG. 1 shows a reference architecture of an Intelligent Transport System (ITS) station according to an embodiment of the present invention.
  • ITS Intelligent Transport System
  • FIG. 2 shows an ITS access layer according to an embodiment of the present invention.
  • FIG. 3 shows a multi-channel allocation used in ITS system operation according to an embodiment of the present invention.
  • FIG. 4 shows a channel coordination mode of multi-channel operation according to an embodiment of the present invention.
  • FIG. 5 shows a reactive time slot reservation method for SA service provision according to an embodiment of the present invention.
  • 6 and 7 illustrate a method of providing a non-SA service through a time slot reserved in a SCH according to another embodiment of the present invention.
  • FIG. 8 shows a method for reservation of a reactive time slot in a SCH according to an embodiment of the present invention.
  • FIG. 9 shows a method for booking a reactive time slot in a SCH according to another embodiment of the present invention.
  • FIG. 10 shows a mapping method between a service and a frequency / time resource when three SA services are simultaneously provided according to an embodiment of the present invention.
  • FIG. 11 shows a mapping method between a service and a frequency / time resource when three SA services are simultaneously provided according to an embodiment of the present invention.
  • FIG. 13 shows a method for receiving an SA service according to an embodiment of the present invention.
  • FIG. 14 shows a configuration of a V2X communication device according to an embodiment of the present invention.
  • the present invention relates to a V2X communication device, the V2X communication device is included in the Intelligent Transport System (ITS) system, and may perform all or some functions of the ITS system.
  • the V2X communication device can perform communication with a vehicle and a vehicle, a vehicle and an infrastructure, a vehicle and a bicycle, and a mobile device.
  • the V2X communication device may also be abbreviated as a V2X device.
  • the V2X device may correspond to an Onboard Unit (OBU) of a vehicle, or may be included in the OBU.
  • OBU may also be referred to as OBE (On Board Equipment).
  • the V2X device may correspond to an infrastructure roadside unit (RSU) or may be included in the RSU.
  • RSU infrastructure roadside unit
  • RSU may also be referred to as RSE (RoadSide Equipment).
  • V2X communication device may correspond to the ITS station or may be included in the ITS station. Any OBU, RSU, and mobile equipment that performs V2X communication may be referred to as an ITS station or a V2X communication device.
  • FIG. 1 shows a reference architecture of an Intelligent Transport System (ITS) station according to an embodiment of the present invention.
  • ITS Intelligent Transport System
  • two end-of-vehicle / users can communicate the communication network, and such communication can be performed through the functionality of each layer of the architecture of FIG.
  • communication can be performed through the functionality of each layer of the architecture of FIG.
  • data is transmitted through each layer down one layer in the transmitting vehicle and its ITS system, and data is passed through each layer up one layer in the receiving vehicle and its ITS system.
  • Description of each layer of the architecture of Figure 1 is as follows.
  • the application layer can implement and support various use cases.
  • the application may provide road safety, efficient traffic information, and other application information.
  • the facility layer can support to effectively realize various use cases defined in the application layer.
  • the facility layer may perform application support, information support, and session / communication support.
  • the network / transport layer can configure a network for vehicle communication between homogenous / heterogeneous networks by using various transport protocols and network protocols.
  • the network / transport layer can provide Internet access and routing using Internet protocols such as TCP / UDP + IPv6.
  • the network / transport layer may configure a vehicle network using a geographical position-based protocol such as Basic Transport Protocol (BTP) / GeoNetworking.
  • BTP Basic Transport Protocol
  • the access layer may transmit the message / data received from the upper layer through a physical channel.
  • the access layer includes a communication technology based on IEEE 802.11 and / or 802.11p standards, a ITS-G5 wireless communication technology based on the physical transport technology of IEEE 802.11 and / or 802.11p standards, and a satellite / wideband wireless mobile communication.
  • the ITS architecture may further include a management layer and a security layer.
  • FIG. 2 shows an ITS access layer according to an embodiment of the present invention.
  • FIG. 2 shows the ITS Access Layer of the ITS system shown in FIG. 1 in more detail.
  • the access layer of FIG. 2 may include a data link layer, a physical layer, and layer management.
  • the access layer of FIG. 2 has similar or identical characteristics to the OSI 1 layer (physical layer) and the OSI second layer (data link layer).
  • the data link layer includes a logical link control (LLC) sub-layer, a medium access control (MAC) sub-layer, and a multi-channel operation (MCO) sub-layer. can do.
  • LLC logical link control
  • MAC medium access control
  • MCO multi-channel operation
  • the physical layer may include a physical layer convergence protocol (PLCP) sublayer and a physical medium access (PMD) sublayer.
  • PLCP physical layer convergence protocol
  • PMD physical medium access
  • the data link layer can convert a noisy adjacent node (or vehicle-to-vehicle) physical circuit into a communication channel without transmission errors for use by a higher network layer.
  • the data link layer transmits / transports / transmits a three-layer protocol, a framing function that groups the data to be transmitted into packets (or frames) as a transmission unit, and compensates the speed difference between the sending and receiving sides.
  • Flow Control function detects transmission errors and corrects or retransmits them.
  • the data link layer provides a sequence number to packets and ACK signals to avoid confusing packets or ACK signals, and establishes, maintains, shorts, and transmits data links between network entities. Perform the control function.
  • the data link layer may include a logical link control (LLC) sublayer and a medium access control (MAC) sublayer based on the IEEE 802 standard.
  • LLC logical link control
  • MAC medium access control
  • the main function of the LLC sublayer is to enable the use of several different sub-MAC sublayer protocols to enable communication regardless of the network topology.
  • the MAC sub-layer may control collision / conflict between vehicles for use of shared media by multiple vehicles (or nodes or vehicles and peripherals).
  • the MAC sublayer may format the packet transmitted from the upper layer to match the frame format of the physical network.
  • the MAC sub-layer may perform a function of adding and identifying a sender address / recipient address, carrier detection, collision detection, and failure detection on a physical medium.
  • the physical layer is the lowest layer in the ITS layer structure, and defines an interface between a node and a transmission medium, and can perform modulation, coding, and mapping of a transport channel to a physical channel for bit transmission between data link layer entities. .
  • the physical layer performs a function of informing whether the wireless medium is in use (busy or idle) to the MAC sublayer through carrier sensing and clear channel assessment (CCA).
  • the physical layer may include a physical layer convergence protocol (PLCP) sublayer and a physical medium access (PMD) sublayer based on the IEEE standard.
  • PLCP physical layer convergence protocol
  • PMD physical medium access
  • the PLCP sublayer connects the MAC sublayer and the data frame.
  • the PLCP sublayer adds a header to the received data so that the MAC sublayer operates regardless of physical characteristics. Therefore, the format of the PLCP frame may be defined differently according to various different wireless LAN physical layer standards.
  • the main function of the PMD sublayer is to perform transmission to a wireless medium according to standards related to transmission / reception after receiving / transmitting a frame received from a PLCP sublayer after carrier / communication modulation (carrier modulation, or communication modulation).
  • Layer management serves to manage and service information related to the operation and security of the access layer.
  • Information and services are delivered and shared in both directions through an MI (inte communicationace between management entity and access layer, or MI-SAP) and an SI (inte communicationace between security entity and access layer, or SI-SAP).
  • MI-SAP integer communicationace between management entity and access layer
  • SI-SAP infrastructure-specific API
  • Bidirectional information and service delivery between the access layer and the network / transport layer is performed by IN (or IN-SAP).
  • the MCO sublayer can provide a variety of services, such as safety services and other services other than safety services, that is, non-safety services using multiple frequency channels.
  • the MCO sublayer effectively distributes traffic loads in a specific frequency channel to other channels, thereby minimizing collision / contention when communicating between vehicles in each frequency channel.
  • FIG. 3 shows a multi-channel allocation used in ITS system operation according to an embodiment of the present invention.
  • FIG. 3 (a) shows US spectrum allocation for ITS
  • FIG. 3 (b) shows EP spectrum allocation for ITS.
  • CCH control channel
  • SCH service channels
  • the use of the ITS-G63 band is considered in addition to the upper frequency band based on 5.9 GHz to provide time-sensitive and large data capacity services, and the ITS-G5 band is used as the lower frequency band. Use is being considered. In this environment, it is necessary to develop an efficient multi-channel operation method to provide high-quality services by appropriately allocating services to various multi-channels.
  • the control channel represents a radio channel used for exchanging management frames and / or WAVE messages.
  • the WAVE message may be a WAVE short message (WSM).
  • the service channel is a radio channel used for service provision, and represents an arbitrary channel, not a control channel.
  • the control channel may be used for communication of a Wave Short Message Protocol (WSMP) message or a system management message such as WAVE Service Advertisement (WSA).
  • WSMP Wave Short Message Protocol
  • WSA WAVE Service Advertisement
  • the SCH may be used for general-purpose application data communication, and communication of the general-purpose application data may be coordinated by service related information such as WSA.
  • WSA may also be referred to as service advertisement information below.
  • the WSA may provide information including an announcement of the availability of the application-service.
  • WSA messages may identify and describe application services and channels to which the service is accessible.
  • the WSA may include header, service information, channel information, and WAVE routing propaganda information.
  • the service advertisement information for accessing the service may be a periodic message.
  • Co-operative Awareness Messages may be periodic messages. CAMs may be periodically broadcast by the facility layer.
  • Decentralized environmental notification messages may be event messages. Event messages can be sent triggered by the detection of an event. Service messages may be sent to manage the session. In the following embodiments, the event message may include a safety message / information. And the service message may include a non-safe message / information.
  • the V2X communication device may broadcast a Cooperative Awareness Message (CAM) or a Decentralized Enviriomental Notification Message (DENM).
  • CAM Cooperative Awareness Message
  • DENM Decentralized Enviriomental Notification Message
  • CAM is distributed in the ITS network, and provides information on at least one of the presence, location, or communication status of the ITS station.
  • DENM provides information on detected events.
  • DENM may provide information on any driving situation or event detected by the ITS station.
  • DENM can provide information on situations such as emergency electronic brakes, vehicle accidents, vehicle problems, traffic conditions, and the like.
  • FIG. 4 shows a channel coordination mode of multi-channel operation according to an embodiment of the present invention.
  • Figure 4 is a channel coordination mode of multi-channel operation (a) (b) continuous (continuous) mode, (b) altering (alternating) mode, (c) extended (extended) mode and (d) immediate (immediate) mode Shows.
  • the channel coordination mode may indicate how the V2X device accesses the CCH and SCH.
  • the V2X device can access at least one channel.
  • a single-radio device may monitor the CCH and exchange data on the SCH (via).
  • the channel interval must be specified, and FIG. 4 shows such a channel interval, i.e., time slot allocation.
  • Radio channel altering may be operated based on a synchronized interval associated with a common time base.
  • the sync interval may include a plurality of time slots.
  • a plurality of time slots may correspond to a CCH interval and a SCH interval.
  • the sync interval may include a CCH interval and a SCH interval.
  • traffic can be exchanged on the CCH.
  • Single-radio devices participating in the application-service may switch to the SCH during the SCH interval.
  • Each of the CCH interval and the SCH interval may include a guard interval. Each interval may start with a guard interval.
  • the exchange of multi-channel operation information and safety-related service information may be performed on the CCH during the CCH interval.
  • negotiation for information exchange between the service provider and the user may be performed on the CCH during the CCH interval.
  • the hardware timing operation for channel change of the V2X device may be initiated by a synchronization signal obtained by Universal Time Coordinated (UTC) estimation.
  • UTC Universal Time Coordinated
  • Channel synchronization may be performed for each 1 PPS (Pulse Per second) interval based on UTC.
  • FIG. 4 is a multi-channel operation (MCO) channel coordination method described in IEEE 1609.4, wherein two MAC layers in one physical layer divide time and alternately use CCH and different channel modes. Shows.
  • MCO multi-channel operation
  • the continuous mode is a mode in which each vehicle or all vehicles operate regardless of time division criteria such as the time slot / CCH interval / SCH interval of FIG. 4.
  • the V2X device may continuously receive multi-channel operation information and safety-related service information on a designated CCH or SCH, or perform information exchange between a service provider and a user.
  • each vehicle or all vehicles receive multi-channel operation information and safety-related services / information during a CCH interval, or perform a negotiation process for exchanging information between service providers / users. You can.
  • each vehicle or all vehicles perform service / information exchange between the service provider and the user during the SCH interval.
  • the V2X device may alternately communicate through the CCH and SCH during the set CCH interval and SCH interval.
  • (d) Extended mode In the extended mode, communication of the CCH interval and the SCH interval may be performed as in the change mode. However, the service / information exchange of the SCH interval may be performed in the CCH interval. As an embodiment, the V2X device in the extended mode may transmit and receive control information during the CCH interval and maintain the SCH interval until the service / information exchange ends when entering the SCH interval.
  • (e) Immediate mode In the immediate mode, communication of the V2X device can be performed as in the change mode and / or the extended mode. However, when the negotiation for information exchange is completed during the CCH interval, the V2X device in the immediate mode may start information exchange by switching the channel directly to the designated SCH instead of waiting for the end of the CCH interval. As shown in Fig. 4, the extended mode and the immediate mode can be used together.
  • information exchange and negotiation for providing management information and service of multiple channels may be performed only on the CCH during the CCH interval.
  • negotiation for receiving safety-related services and information or for exchanging information between service providers and users may also be performed only on the CCH during the CCH interval.
  • a guard interval may be included between the CCH interval and the SCH interval.
  • the guard interval can secure a time required for synchronization when a communication device changes a frequency and changes a channel.
  • the hardware timer operation may be started by a synchronization signal obtained by Coordinated Universal Time (UTC) estimation.
  • UTC Coordinated Universal Time
  • the channel synchronization can match the channel synchronization for each 1PPS (Pulse Per Second) section using UTC as a reference signal.
  • the synchronization interval may include a CCH interval and a SCH interval. That is, one sync interval may include two time slots, and each of the CCH interval and the SCH interval may correspond to timeslot 0 and timeslot 1.
  • the start of the sync interval may coincide with the start of the second in common time.
  • An integer multiple of a sync interval for 1 second time may be included.
  • the V2X communication device can communicate using a multichannel operation (MCO) technology using multiple antennas.
  • MCO multichannel operation
  • ETSI MCO design described in ETSI TS 102 646-4-2 is designed considering mainly the following items.
  • a channel access (CA) method capable of effectively using channel resources using multiple antennas in multiple channels should be provided.
  • a mechanism for a V2X device to effectively receive a service advertisement message / SAM (Service Announcement Message) providing V2X service information and to move to a channel in which the corresponding service is provided should be provided.
  • SAM Service Announcement Message
  • a mechanism should be provided to minimize interference effects between adjacent channels that may occur when V2X transmission and reception using two or more multiple antennas and adjacent channels are performed simultaneously in the same vehicle.
  • Control Channel is a basic channel that provides messages related to traffic safety such as Cooperative Awareness Message (CAM), Decentralized Environmental Notification Message (DENM), TOPO (Topology), and MAP.
  • Safety messages that are not sufficiently provided in the CCH may be provided through the SCH.
  • the added safety message may be provided in the SCH.
  • V2X service provided through a service channel is announced through a SAM, and the SAM can be provided through a well-known reference channel.
  • V2X service information provided in a channel band such as ITS-G5A / B / D may be provided through SAM in a reference CCH.
  • V2X service information provided in each channel band may be provided through SAM in an alternate reference SCH (SCH) arbitrarily designated in the channel band.
  • Time slots may be reserved in the CCH to provide synchronized SA service in the SCH.
  • time slots for SA service provision may be reserved in the CCH.
  • Time slots for SA service provision may be defined in advance when accessing multiple channels.
  • Reservation information related to SA operation and SA service provision may be provided through a service advertisement message (SAM) or a separate beacon message.
  • SAM service advertisement message
  • a safety interval a service interval, a time slot for SA reservation (TS for SA reservation), and a default time slot for SA (TS for SA) (default)), a time slot for non-SA (TS for non-SA), and a description of Spectrum Aggregation-InterFrame Spacing (SA-IFS) are as follows.
  • Safety interval The section where safety services / messages are provided
  • Service interval The interval in which a non-safety service / message is provided, and a time slot for SA (TS for SA) and a time slot for non-SA (TS for non-SA) Included.
  • Time slot for SA reservation (TS for SA reservation): This is a section in which reservation information related to SA operations and SA services is provided, and reservation message transmission may be performed through competition with safety-related services.
  • Time slot for non-SA (TS for non-SA): a section in which a non-SA service is provided
  • SA-IFS Spectrum Aggregation-InterFrame Spacing
  • FIG. 5 shows a reactive time slot reservation method for SA service provision according to an embodiment of the present invention.
  • the V2X communication device may perform SA operation and SA service provision in a service channel during "default time slot for SA".
  • the SA service provision of the V2X communication device may be performed by a reservation request during the "time slot for SA reservation" in the CCH.
  • a reservation message or reservation signal for SA service provision may not be detected during the “time slot for SA reservation” of the CCH.
  • the predefined time slot of the SCH is considered as a “time slot for non-SA” section and can be used to provide a service that does not use the SA.
  • a reservation message or reservation signal for SA service provision may not be detected during the “time slot for SA reservation” of the CCH.
  • 6 and 7 illustrate a method of providing a non-SA service through a time slot reserved in a SCH according to another embodiment of the present invention.
  • FIG. 6 shows an embodiment in which SA service provision time provided during “effective time slot for SA” is the same for each channel
  • FIG. 7 shows an embodiment in which SA service provision time provided is different for each channel.
  • the check for the section for providing the non-SA service in the section “Effective time slot for SA” is confirmed from the reservation information provided in the section “Time slot for SA reservation” of the CCH Can be.
  • the V2X communication device may check whether a section for providing a non-SA service is used by sensing " default time slot for SA ".
  • the V2X communication device may check the “effective time slot for SA” from the SA service reservation information received during the “Time slot for SA reservation” section on the CCH.
  • the interval of the "effective time slot for the SA” is shorter than the "default time slot for the SA”
  • the interval corresponding to the difference may be considered as the "time slot for the non-SA” interval.
  • general transmission and reception and service provision without using the SA may be performed.
  • 8 to 11 show a method of reactively scheduling time slots in advance in the SCH to provide synchronized SA service in the SCH.
  • the time slot for providing the SA service may be predefined when accessing multiple channels even if it is not used.
  • FIG. 8 shows a method for reservation of a reactive time slot in a SCH according to an embodiment of the present invention.
  • the SA use service in the “default time slot for SA” section may be provided through reservation at a safety interval of the SCH.
  • the time slot of the predefined SCH is determined to be a “time slot for non-SA”, to provide a general service that does not use the SA. Can be used.
  • FIG. 9 shows a method for booking a reactive time slot in a SCH according to another embodiment of the present invention.
  • the SA usage service in the “default time slot for SA” section may be provided through reservation at a safety interval of the SCH.
  • an SA usage service may be reserved in the “time slot for SA reservation” in the “safety interval” section.
  • “safety interval” includes “time slot for safety (TS for Safety)” and “time slot for SA reservation (TS for SA reservation)”.
  • a safety message is provided during the "time slot for safety”
  • a SAM / beacon containing reservation information related to SA operation and SA usage service during the "time slot for SA reservation” is provided.
  • the time slot of the predefined SCH is “time slot for non-SA” It is considered and can be used to provide general services that do not use SA.
  • 10 and 11 show a mapping method between a service and a frequency / time resource for providing an SA service according to an embodiment of the present invention.
  • 10 and 11 show a mapping method between service and frequency / time resources for providing a synchronized SA service in a reserved time slot as described above.
  • a mapping method between a service and a frequency / resource when a reactive time slot reservation method in the SCH of FIG. 8 is used will be described.
  • TSS-x means the interval (time) for transmitting the x-th SA service including SA-IFS in the “TS for SA (default)” section, and is variablely set according to the SA service length do.
  • Void / Void time means the time during which no SA service is provided during each TSS, and is determined according to the length of each TSS.
  • TS for SA (effective): The section in which the actual SA service is provided and calculated by the sum of each TSS.
  • CSMA / CA operation for providing synchronized SA service in a reserved time-slot period is defined as follows.
  • the CSMA / CA back-off process is omitted (OFF) for synchronization between services provided through different frequencies.
  • Determination of a frequency / time resource reservation order to be used for service provision may be performed as follows.
  • the frequency / time resource reservation order for SA service provision in the SCH is determined through contention in the CCH. If the reservation order is relatively low, the SA service with a fast reservation order is reserved so as not to overlap with the frequency / time resource previously reserved.
  • Frequency / time resource reservation in consideration of SA service priority is performed by taking CSMA / CA back-off process small in CCH.
  • the SAM (or beacon) transmitted for SA service reservation basically includes the following information.
  • Frequency resource information for SA service channel number
  • SA service length information provided: SL (Service Length)
  • FIG. 10 shows a mapping method between a service and a frequency / time resource when three SA services are simultaneously provided according to an embodiment of the present invention.
  • Three services, Service A, Service B, and Service C, may be provided, and all three services may be provided in the SA method.
  • Reservation information related to each service may be configured as follows.
  • Reservation information for the provision of SA service A may include the following information.
  • Time resource information for providing SA service ⁇ TSS-0 ⁇
  • Reservation information for the provision of SA service B may include the following information.
  • Service B may be set so as not to overlap with the frequency / time resource reserved for service A.
  • Time resource information for providing SA service ⁇ TSS-0 ⁇
  • Reservation information for the provision of SA service C may include the following information.
  • Service C may be set so as not to overlap with the frequency / time resources reserved for Service A and Service B.
  • Time resource information for provision of SA service ⁇ TSS-1 ⁇
  • a mapping method between a service and a frequency / time resource using reservation information for each service described above is as follows.
  • TSS-0 length max ⁇ SL-a, SL-b ⁇
  • TSS-1 length max ⁇ SL-c ⁇
  • TS for SA (effective) length TSS-0 length + TSS-1 length
  • SA service transmission using a reserved frequency / time resource may be performed as follows.
  • Service A can be transmitted without CSMA / CA backoff, in the frequency / channel of ⁇ SCH-a, SCH-d ⁇ , during TSS-0 time after SA-IFS in "default time slot for SA”.
  • Service B may be transmitted without CSMA / CA backoff, in the frequency / channel of ⁇ SCH-b, SCH-f ⁇ , during TSS-0 time after SA-IFS in the "default time slot for SA”.
  • Service C is the CSMA / CA backoff, in the frequency / channel of ⁇ SCH-c, SCH-e ⁇ , during TSS-1 time after transmission of Service A and Service B and SA-IFS in "Default time slot for SA" Can be transmitted without.
  • the interval of the effective time slot for the SA is shorter than the interval of the default time slot for the SA.
  • the remaining unused section is considered as a time slot for a non-SA, and can be used for providing other operations and services that do not use the SA. Detection and confirmation of the remaining section may be estimated using SA service reservation information. Alternatively, in the case of detection and confirmation of the remaining section, whether to use it may be checked by sensing the “default time slot for SA” section.
  • FIG. 11 shows a mapping method between a service and a frequency / time resource when three SA services are simultaneously provided according to an embodiment of the present invention.
  • Three services, Service A, Service B, and Service C, may be provided, and all three services may be provided in the SA method.
  • Reservation information related to each service may be configured as follows.
  • Reservation information for the provision of SA service A may include the following information.
  • Time resource information for providing SA service ⁇ TSS-0 ⁇
  • Reservation information for the provision of SA service B may include the following information.
  • Service B may be set so as not to overlap with the frequency / time resource reserved for service A.
  • Time resource information for provision of SA service ⁇ TSS-1 ⁇
  • Reservation information for the provision of SA service C may include the following information.
  • Service C may be set so as not to overlap with the frequency / time resources reserved for Service A and Service B.
  • Time resource information for provision of SA service ⁇ TSS-2 ⁇
  • a mapping method between a service and a frequency / time resource using reservation information for each service described above is as follows.
  • TSS-0 length max ⁇ SL-a ⁇
  • TSS-1 length max ⁇ SL-c ⁇
  • TSS-2 length max ⁇ SL-c ⁇
  • TS for SA (effective) length TSS-0 length + TSS-1 length + TSS-2 length
  • SA service transmission using a reserved frequency / time resource may be performed as follows.
  • Service A can be transmitted without CSMA / CA backoff, in the frequency / channel of ⁇ SCH-a, SCH-d ⁇ , during TSS-0 time after SA-IFS in "default time slot for SA".
  • Service B is to be transmitted without CSMA / CA backoff, in the frequency / channel of ⁇ SCH-a, SCH-d ⁇ , during TSS-1 time after transmission of Service A and SA-IFS in "Default time slot for SA" You can.
  • Service C transmits Service A and Service B in the "default time slot for SA" and for TSS-2 hours after SA-IFS, CSMA / CA backoff on the frequency / channel of ⁇ SCH-a, SCH-d ⁇ Can be transmitted without.
  • the interval of the effective time slot for the SA is shorter than that of the default time slot for the SA.
  • the remaining unused section is considered as a time slot for a non-SA, and can be used for providing other operations and services that do not use the SA. Detection and confirmation of the remaining section may be estimated using SA service reservation information. Alternatively, in the case of detection and confirmation of the remaining section, whether to use it may be checked by sensing the “default time slot for SA” section.
  • the application layer When there is an SA service to be transmitted, the application layer requests a service transmission to the facility layer (S12010).
  • the facility layer may generate a SAM including information related to the provision of the SA service to be transmitted according to the request of the application layer (S12020).
  • the information related to the provision of the SA service may include at least one of configuration information of the SA service or transmission channel information.
  • Transmission channel information such as frequency / time resource information through which the SA service is transmitted may be determined by a management entity and transmitted to the facility layer.
  • the access layer may transmit the SAM (S12030).
  • the SAM is generated in the facility layer, and includes the above-described SA service related information.
  • SAM ⁇ CCH or SCH may be transmitted.
  • the application layer may provide an SA service to be transmitted (S12040). That is, the application layer may transfer data corresponding to the SA service to be transmitted to the facility layer.
  • the facility layer may segment the SA service (S12050).
  • the facilite layer may divide the SA service data transmitted from the application layer in consideration of reserved frequency / time resources.
  • the divided service may have the same PSID and the same size.
  • the combining order information may be included in the transmission SA service / data.
  • the access layer may transmit the SA service using the frequency / time resource selected in the SCH (S12060).
  • FIG. 13 shows a method for receiving an SA service according to an embodiment of the present invention.
  • 13 is a method of receiving an SA service of a V2X communication device, and describes the operation of each layer.
  • the SAM is received through the CCH or SCH in the access layer (S13010).
  • the SAM received at the access layer is transmitted to the facility layer through the network layer.
  • the facility layer identifies and classifies the SA service information (S13020).
  • the SA service information identified and classified in the facility layer is transmitted to the application layer.
  • the application layer may select and request the SA service to be received based on the SA service information transmitted from the facility layer (S13030).
  • the access layer may receive the SA service during the frequency / time resource selected in the SCH based on the request of the application (S13040).
  • the received SA service data is transmitted to the facility layer through the network layer.
  • the facility layer may combine the divided SA services (S13050).
  • the divided SA service delivered to the facility layer is combined into one intact SA service using the combination order information, and is delivered to the application layer.
  • the application layer receives the SA service (S13060).
  • the application layer may use the received SA service.
  • FIG. 14 shows a configuration of a V2X communication device according to an embodiment of the present invention.
  • the V2X communication device 14000 may include a communication unit 14010, a processor 1420, and a memory 1430.
  • the communication unit 14010 may be connected to the processor 1420 to transmit / receive wireless signals.
  • the communication unit 14010 may upconvert data received from the processor 1420 into a transmission / reception band to transmit a signal or downconvert a received signal.
  • the communication unit 14010 may implement an operation of at least one of a physical layer or an access layer.
  • the communication unit 14010 may include a plurality of sub RF units to communicate according to a plurality of communication protocols.
  • the communication unit 14010 includes DSG (Dedicated Short Range Communication), ITS-G5 wireless communication technology based on IEEE 802.11 and / or 802.11p standard physical transmission technology, and 2G including satellite / wideband wireless mobile communication. Data communication can be performed based on / 3G / 4G (LTE) / 5G wireless cellular communication technology, broadband terrestrial digital broadcasting technology such as DVB-T / T2 / ATSC, GPS technology, IEEE WAVE technology, and the like.
  • the communication unit 14010 may include a plurality of transceivers implementing each communication technology. In addition, one of the plurality of transceivers may access the control channel, and the other transceiver may access the service channel.
  • the processor 1420 may be connected to the communication unit 1410 to implement operations of layers according to the ITS system or the WAVE system.
  • the processor 1420 may be configured to perform operations according to various embodiments of the present invention according to the above-described drawings and descriptions.
  • at least one of modules, data, programs, or software implementing the operation of the V2X communication device 14000 according to various embodiments of the present invention described above is stored in the memory 1430 and can be executed by the processor 1420. have.
  • the memory 1430 is connected to the processor 1420 and stores various information for driving the processor 1420.
  • the memory 1430 may be included inside the processor 1420 or installed outside the processor 1420 to be connected to the processor 1420 by known means.
  • the processor 1420 of the V2X communication device 14000 may perform the SA service transmission / reception operation described in the present invention.
  • the SA service transmission operation of the V2X communication device 14000 will be described again below.
  • the V2X communication device may transmit the SA service reservation information (S15010).
  • the V2X communication device may transmit SA service reservation information to reserve communication resources for SA service provision.
  • SA service reservation may be performed as described above with reference to FIGS. 5 to 9.
  • the V2X communication device may map SA service data and communication resources (S15020).
  • the V2X communication device may map SA service data and communication resources based on the SA service reservation information.
  • Communication resources include frequency resources and communication resources.
  • the V2X communication device may transmit SA service data (S15030).
  • the V2X communication device may transmit SA service data through the mapped frequency resource and time resource.
  • Mapping of SA service data and communication resources and transmission of SA service data may be performed as described above with reference to FIGS. 10 and 11.
  • SA service reservation information may be transmitted through a control channel or a service channel.
  • SA service data may correspond to one service and may be transmitted through multiple channels.
  • the SA service reservation information may include at least one of frequency resource information through which the SA service is transmitted, time resource information through which the SA service is transmitted, and length information of the SA service.
  • the frequency resource information may indicate a plurality of service channels
  • the time resource information may indicate a time slot in which SA service data is transmitted
  • the length information may indicate the length of a time period in which SA service data is transmitted.
  • the time slot indicated by the time resource information may correspond to a time slot (TS) or a time subslot (TSS) of the above-described embodiment.
  • the SA service data is divided into a plurality of channels and mapped, and the divided SA service data may have the same PSID or the same service length.
  • the SA service reservation information When the SA service reservation information is transmitted to the service channel, the SA service reservation information may be transmitted during a safety interval. In addition, SA service data may be transmitted during a service interval.
  • the service interval includes a time slot for SA service and a time slot for non-SA service
  • the time slot for SA service may include a first time subslot for SA service data transmission.
  • the time slot for the SA service may further include a second time sub-slot for transmitting the non-SA service when the SA service is not transmitted.
  • the present invention proposes a reactive time-slot (TS) reservation method for providing SA service in multichannel access.
  • a method of reserving the use of a predefined time-slot interval when an SA service request is proposed is proposed.
  • a reactive time-slot reservation method performed in a control channel (CCH) for providing synchronized SA service in a service channel (SCH) is proposed.
  • a reactive time-slot reservation method performed in the SCH is proposed to provide a synchronized SA service in the SCH.
  • the present invention proposes a mapping method between a service and a frequency / time resource for providing a synchronized SA service in a reserved time-slot period.
  • an operation for providing a service in a time sub-slot (TSS) period synchronized in a time-slot period is defined.
  • CSMA / CA operation is defined in a time-slot period.
  • the present invention proposes a method of using a time-slot reserved for SA service provision for non-SA service provision.
  • the presence or absence of SA service may be used to define an operation using the entire time-slot or using only a part.
  • Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
  • one embodiment of the invention includes one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), FPGAs ( field programmable gate arrays), processors, controllers, microcontrollers, microprocessors, and the like.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • processors controllers, microcontrollers, microprocessors, and the like.
  • an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above.
  • the software code can be stored in memory and driven by a processor.
  • the memory is located inside or outside the processor, and can exchange data with the processor by various known means.
  • the present invention is used in a series of vehicle communication fields.

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

Abstract

L'invention concerne un procédé de transmission de service d'agrégation de spectre (SA). Le procédé de transmission de service SA comprend les étapes consistant à : transmettre des informations de réservation de service SA pour une réservation de ressource de communication afin de fournir un service SA; et mapper des données de service SA à la ressource de communication sur la base des informations de réservation de service SA, la ressource de communication comprenant une ressource de fréquence et une ressource de temps et des données de service SA étant transmises par l'intermédiaire de la ressource de fréquence et de la ressource de temps.
PCT/KR2018/012556 2018-10-23 2018-10-23 Dispositif de communication v2x et son procédé de transmission de service sa synchronisé Ceased WO2020085523A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090117560A (ko) * 2008-05-09 2009-11-12 엘지전자 주식회사 멀티-채널 무선 통신 네트워크에서의 다이렉트 링크 설정절차와 채널 할당 메커니즘
US20120093091A1 (en) * 2010-10-17 2012-04-19 Industrial Technology Research Institute Method and system for extended service channel access on demand in an alternating wireless channel access environment
US20160174106A1 (en) * 2013-07-30 2016-06-16 Ist International, Inc. Peer to peer vehicle ad hoc network with bandwidth bonding, seamless mobility and flow-based routing
KR20160120770A (ko) * 2014-03-19 2016-10-18 후아웨이 테크놀러지 컴퍼니 리미티드 멀티채널 액세스 방법 및 장치
KR20180080070A (ko) * 2017-01-03 2018-07-11 삼성전자주식회사 V2X 통신을 위한 inter-carrier 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090117560A (ko) * 2008-05-09 2009-11-12 엘지전자 주식회사 멀티-채널 무선 통신 네트워크에서의 다이렉트 링크 설정절차와 채널 할당 메커니즘
US20120093091A1 (en) * 2010-10-17 2012-04-19 Industrial Technology Research Institute Method and system for extended service channel access on demand in an alternating wireless channel access environment
US20160174106A1 (en) * 2013-07-30 2016-06-16 Ist International, Inc. Peer to peer vehicle ad hoc network with bandwidth bonding, seamless mobility and flow-based routing
KR20160120770A (ko) * 2014-03-19 2016-10-18 후아웨이 테크놀러지 컴퍼니 리미티드 멀티채널 액세스 방법 및 장치
KR20180080070A (ko) * 2017-01-03 2018-07-11 삼성전자주식회사 V2X 통신을 위한 inter-carrier 방법

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