WO2020259293A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2020259293A1
WO2020259293A1 PCT/CN2020/095451 CN2020095451W WO2020259293A1 WO 2020259293 A1 WO2020259293 A1 WO 2020259293A1 CN 2020095451 W CN2020095451 W CN 2020095451W WO 2020259293 A1 WO2020259293 A1 WO 2020259293A1
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WO
WIPO (PCT)
Prior art keywords
time
frequency resource
time window
resource
terminal device
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PCT/CN2020/095451
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English (en)
Chinese (zh)
Inventor
李添泽
马驰翔
向铮铮
卢磊
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华为技术有限公司
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Publication of WO2020259293A1 publication Critical patent/WO2020259293A1/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
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method and device.
  • V2V Vehicle-to-Vehicle
  • V2P vehicle-to-pedestrian
  • V2I/N vehicle-to-infrastructure/network
  • V2X vehicle to everything
  • SL side link
  • V2X side link communication includes two communication modes: the first communication mode is V2X direct communication based on base station scheduling. V2X terminals send V2X communication control messages and data on the scheduled time-frequency resources according to the scheduling information of the base station; The second communication mode is that the V2X terminal independently selects the time-frequency resource used for communication among the available time-frequency resources included in the V2X communication resource pool, and sends control messages and data on the selected time-frequency resource.
  • the base station centrally allocates resources according to the report of the buffer status (BSR) of the terminal.
  • BSR buffer status
  • the second communication mode there is no network equipment for unified resource management.
  • V2X terminals can only select communication resources for V2X communication by themselves, which may easily cause collisions of resources selected by V2X terminals.
  • the V2X terminal can send indication information in advance to indicate the reserved time-frequency resources, and other V2X terminals can monitor the indication information to avoid selecting the same resource, thereby reducing the probability of data transmission collisions.
  • the transmission resources occupied by different V2X terminals may still collide, which affects the transmission efficiency of indication information and service data.
  • the embodiments of the present application provide a communication method and device, which can avoid resource collisions, improve the reliability of transmission of indication information and service information, and improve network transmission efficiency.
  • a communication method includes: a first terminal device detects second resource indication information from a second terminal device before time n, and the second resource indication information is used to indicate The second terminal device sends the second time-frequency resource of the second data packet; the first terminal device starts from the second time window [n+t2, n+t3] at the time point n according to the second resource indication information
  • the first time-frequency resource is determined in, and the first time-frequency resource is used to send the first data packet; the first terminal device sends the first resource indication information in the first time window [n, n+t1], and the A resource indication information is used to indicate the first time-frequency resource; where t1 ⁇ t2 and t2>t1; the first terminal device sends the first data packet on the first time-frequency resource.
  • the first terminal device since the first terminal device sends the first resource indication information in the first time window [n, n+t1], and sends the first data packet in the second time window [n+t2, n+t3], And t1 ⁇ t2 and t2>t1, so there is a period of time between the first time window and the second time window. That is, there is a period of time between the time-frequency resource for sending the first resource indication information by the first terminal device and the time-frequency resource for sending the first data packet by the first terminal device.
  • the time-frequency resource for the first terminal device to send the first resource indication information The resource will not collide with the time-frequency resource of the data packet sent by the other second terminal device, thereby avoiding the time-frequency resource of the first terminal device sending the first resource indication information from being collided by the time-frequency resource of the data packet sent by the other terminal device , Improve the reliability of the resource indication information, making the network transmission efficiency higher.
  • the meaning of the first time window [n, n+t1] means that the first time window starts from the time point n to the time point n+t1 in the time domain.
  • the meaning of the second time window [n+t2, n+t3] means that the second time window starts from the time point n+t2 to the time point n+t3 in the time domain.
  • the interval time window between the first time window [n, n+t1] and the second time window [n+t2, n+t3] is [n+ t1,n+t2], which are equal in length to the first time window [n,n+t1] and the second time window [n+t2,n+t3].
  • the length of the first time window, the second time window, and the interval time window are equal.
  • the length of the first time window, the second time window, and the interval time window may not be completely the same.
  • the above method further includes: the first terminal device receives first indication information from a network device, the first indication information It is used to indicate the length of the first time window, the second time window, and the interval time window between the first time window and the second time window; or, the first time window, the second time window, And the length of the interval time window between the first time window and the second time window is predefined.
  • the length of the first time window, the second time window, and the interval time window may be obtained from the network device, or may be predefined.
  • the second time-frequency resource is located within the first time window [n, n+t1]; the above method also The method includes: the first terminal device determines a third time-frequency resource from time-frequency resources other than the second time-frequency resource in the first time window [n, n+t1], and the third time-frequency resource is used to transmit the The first resource indication information.
  • the time-frequency resource can avoid collisions between the third time-frequency resource used by the first terminal device to send the first resource indication information and the time-frequency resource reserved for sending the second data packet by the second terminal device.
  • the second time-frequency resource is located in the second time window [n+t2, n+t3];
  • the first terminal device determines the first time-frequency resource from the second time window [n+t2, n+t3] at the aforementioned time point n according to the aforementioned second resource indication information, including: the first terminal device determines the first time-frequency resource from the second time window [n+t2, n+t3]
  • the first time-frequency resource is determined from time-frequency resources other than the second time-frequency resource in [n+t2, n+t3].
  • the first time-frequency resource used to send the first data packet is the time-frequency resource not reserved by the second terminal device for sending the second data packet in the second time window [n+t2, n+t3] Therefore, collisions between the first time-frequency resource for sending the first data packet by the first terminal device and the second time-frequency resource for sending the second data packet by the second terminal device can be avoided, thereby improving the reliability of service transmission.
  • the second time-frequency resource is located in the second time window [n+t2, n+t3], and the In the second time window [n+t2, n+t3], the time-frequency resources other than the second time-frequency resource are smaller than the first time-frequency resource, and the priority of the first data packet is higher than the second data packet
  • the first terminal device determines the first time-frequency resource from the second time window [n+t2, n+t3] at the time point n according to the second resource indication information, including: the first terminal device
  • the time-frequency resource used to send the first data packet is determined from the second time-frequency resource.
  • high-priority data packets can preempt the reserved time-frequency resources for sending low-priority data packets, thereby ensuring high-priority data packets. Reliability of data packet transmission.
  • the above method further includes: the first terminal device sends a notification message to the second terminal device, the notification message being Instructing that part or all of the time-frequency resources in the second time-frequency resources in the second time window are used for the first terminal device to send the first data packet. Based on this solution, other terminal devices are notified that part or all of the second time-frequency resources in the second time window are used by the first terminal device to send the first data packet, so that other terminal devices can learn about resource preemption.
  • the first terminal device sending the first resource indication information within the first time window includes: the first According to the first time-frequency resource pattern, the terminal device respectively sends the first resource indication information in the multiple time-frequency resource units within the first time window [n, n+t1]; wherein, the multiple time-frequency resource units Is a time-frequency resource unit in a time-frequency resource other than the second time-frequency resource in the first time window [n, n+t1], and the first time-frequency resource pattern is used to indicate the multiple time-frequency resources The relative positional relationship between the units in the time and frequency domain.
  • the first terminal device when the first terminal device and the second terminal device have different first time-frequency resource patterns, the first terminal device sends multiple copies of the time-frequency resource of the first resource indication information and the second terminal device sends multiple copies of the second
  • the multiple time-frequency resources of the resource indication information will not completely overlap, which can reduce the probability of collision between the time-frequency resource for sending the first resource indication information by the first terminal device and the time-frequency resource for sending the second resource indication information by the second terminal device, This further improves the reliability of the resource indication information.
  • the above-mentioned first resource indication information and the above-mentioned second resource indication information are carried in a broadcast message.
  • the first terminal device can obtain the second resource indication information by listening to the broadcast message sent by the second terminal device, and the first terminal device can also send the first resource indication information to the second terminal device, so that the second terminal device The device acquires the first resource indication information of the first terminal device.
  • a second aspect of the embodiments of the present application provides a communication method, the method includes: a network device determines first indication information, the first indication information is used to indicate a first time window, a second time window, and the first time The length of the interval time window between the window and the second time window, wherein the first time window is used for the first terminal device to send resource indication information, and the second time window is used for the first terminal device to send data packets; The network device sends the first indication information to the first terminal device. Based on this solution, the network device can determine the length of the first time window, the second time window, and the interval time window between the first time window and the second time window, and send them to the first terminal device.
  • the first terminal device Since the first terminal device sends the first resource indication information in the first time window, the first terminal device sends the first data packet in the second time window, and there is an interval time between the first time window and the second time window Window, so that the time-frequency resource of the first terminal device sending resource indication information will not collide with the time-frequency resource of other second terminal devices sending data packets, thereby avoiding the time-frequency resource of the first terminal device sending resource indication information
  • the time-frequency resources of the data packets sent by other terminal devices are collided, which improves the reliability of the resource indication information and makes the transmission efficiency of the network higher.
  • the lengths of the first time window, the second time window, and the interval time window are equal. Based on this solution, the length of the first time window, the second time window, and the interval time window are equal. Optionally, in practical applications, the lengths of the first time window, the second time window, and the interval time window may not be completely the same.
  • a device in a third aspect of the embodiments of the present application, includes: a processing unit and a transceiving unit; the transceiving unit is configured to detect second resource indication information from a second terminal device before a time point n, the second resource The indication information is used to instruct the second terminal device to send the second time-frequency resource of the second data packet; the processing unit is used to start from the second time window [n+t2, according to the second resource indication information at the time point n, The first time-frequency resource is determined in n+t3], and the first time-frequency resource is used to send the first data packet; the above transceiver unit is also used to send the first time-frequency resource within the first time window [n, n+t1] Resource indication information, where the first resource indication information is used to indicate the first time-frequency resource; where t1 ⁇ t2 and t2>t1; the transceiver unit is also used to send the first data packet on the first time-frequency resource .
  • the interval time window between the first time window [n, n+t1] and the second time window [n+t2, n+t3] is [n+ t1,n+t2], which are equal in length to the first time window [n,n+t1] and the second time window [n+t2,n+t3].
  • the foregoing transceiver unit is further configured to receive first indication information from a network device, where the first indication information is used to indicate The length of the first time window, the second time window, and the interval time window between the first time window and the second time window; or, the first time window, the second time window, and the first time window The length of the interval time window between a time window and the foregoing second time window is predefined.
  • the foregoing second time-frequency resource is located within the first time window [n, n+t1]; the foregoing processing Unit, further configured to determine a third time-frequency resource from time-frequency resources other than the second time-frequency resource in the first time window [n, n+t1], and the third time-frequency resource is used to send the first time-frequency resource One resource indication information.
  • the second time-frequency resource is located in the second time window [n+t2, n+t3];
  • the processing unit is specifically configured to determine the first time-frequency resource from time-frequency resources other than the second time-frequency resource in the second time window [n+t2, n+t3].
  • the second time-frequency resource is located within the second time window [n+t2, n+t3], and the In the second time window [n+t2, n+t3], the time-frequency resources other than the second time-frequency resource are smaller than the first time-frequency resource, and the priority of the first data packet is higher than the second data packet The priority; the processing unit is specifically configured to determine the time-frequency resource used to send the first data packet from the second time-frequency resource.
  • the foregoing transceiver unit is further configured to send a notification message to the foregoing second terminal device, and the notification message is used to instruct the foregoing Part or all of the time-frequency resources in the second time-frequency resources are used by the transceiver unit to send the first data packet.
  • the above-mentioned transceiver unit is specifically configured to operate in the above-mentioned first time window according to the first time-frequency resource pattern [n, The multiple time-frequency resource units within n+t1] respectively send the first resource indication information; wherein, the multiple time-frequency resource units are the first time window [n, n+t1] divided by the second time A time-frequency resource unit in a time-frequency resource other than the frequency resource, and the first time-frequency resource pattern is used to indicate the relative positional relationship between the multiple time-frequency resource units in the time-frequency domain.
  • the above-mentioned first resource indication information and the above-mentioned second resource indication information are carried in a broadcast message.
  • a network device in a fourth aspect of the embodiments of the present application, includes: a processing unit and a transceiver unit; the processing unit is configured to determine first indication information, and the first indication information is used to indicate a first time window, The second time window and the length of the interval time window between the first time window and the second time window, wherein the first time window is used for the first terminal device to send resource indication information, and the second time window is used
  • the data packet is sent at the first terminal device; the transceiver unit is configured to send the first instruction information to the first terminal device.
  • the lengths of the first time window, the second time window, and the interval time window are equal.
  • a computer storage medium stores computer program code.
  • the computer program code runs on a processor, the computer executes any of the foregoing Communication method.
  • the sixth aspect of the embodiments of the present application provides a computer program product that stores computer software instructions executed by the above-mentioned processor, and the computer software instructions include a program for executing the solution described in the above-mentioned aspect.
  • a communication device in a seventh aspect of the embodiments of the present application, includes an input and output interface and a processor.
  • the input and output interface is used to communicate with other network elements; and the processor is used to execute computer program instructions to implement The communication method described in any of the above aspects.
  • the communication device may further include a memory for storing computer program instructions.
  • An eighth aspect of the embodiments of the present application provides a communication device that exists in the form of a chip product.
  • the structure of the device includes a processor and may also include a memory.
  • the memory is used to couple with the processor and store the Program instructions and data necessary for the device, and the processor is used to execute the program instructions stored in the memory, so that the device executes the method described in any of the foregoing aspects.
  • the ninth aspect of the embodiments of the present application provides a communication device, which exists in the form of a chip product.
  • the structure of the device includes a processor and an interface circuit.
  • the processor is used to communicate with other devices through a receiving circuit so that The device executes the method described in any of the above aspects.
  • FIG. 1 is a schematic diagram of a V2X communication scenario provided by an embodiment of this application.
  • Figure 2 is a schematic diagram of an application scenario of a resource reservation method provided in the prior art
  • FIG. 3 is a schematic structural diagram of a terminal device provided by an embodiment of this application.
  • FIG. 5 is a schematic diagram 1 of an application scenario of a communication method provided by an embodiment of this application.
  • FIG. 6 is a schematic diagram 2 of an application scenario of a communication method provided by an embodiment of this application.
  • FIG. 7 is a third schematic diagram of an application scenario of a communication method provided by an embodiment of this application.
  • FIG. 8 is a fourth schematic diagram of an application scenario of a communication method provided by an embodiment of this application.
  • FIG. 9 is a schematic diagram 5 of an application scenario of a communication method provided by an embodiment of this application.
  • FIG. 10 is a sixth schematic diagram of an application scenario of a communication method provided by an embodiment of this application.
  • FIG. 11 is a schematic diagram of the composition of a terminal device provided by an embodiment of the application.
  • FIG. 12 is a schematic diagram of the composition of a network device provided by an embodiment of this application.
  • FIG. 13 is a schematic diagram of the composition of another terminal device provided by an embodiment of this application.
  • FIG. 14 is a schematic diagram of the composition of another network device provided by an embodiment of this application.
  • a, b, or c can mean: a, b, c, a and b, a and c, b and c, or, a and b and c, where a, b and c c can be single or multiple.
  • words such as “first” and “second” are used to distinguish the same items or similar items that have substantially the same function and effect. Those skilled in the art can understand that words such as “first” and “second” do not limit the number and execution order. For example, the "first" in the first device and the "second” in the second device in the embodiment of the present application are only used to distinguish different devices.
  • the embodiment of the present application provides a communication method, which can be applied to the V2X communication scenario shown in FIG. 1.
  • the first terminal device and the second terminal device communicate via sidelink (Sidelink, SL).
  • Sidelink Sidelink
  • the V2X network also has an uplink (uplink) and a downlink ( downlink).
  • V2X communication includes vehicle-to-vehicle communication (Vehicle-to-Vehicle, V2V), vehicle-to-infrastructure communication (Vehicle-to-Infrastructure, V2I), vehicle-to-people communication (Vehicle to People, V2P), And the communication between the vehicle and the application server (Vehicle-to-Network, V2N), etc.
  • FIG. 1 only takes V2V communication in which both the first terminal device and the second terminal device are vehicles as an example for illustration, and the embodiment of the present application does not limit the specific communication scenario of V2X.
  • the first terminal device and the second terminal device may communicate with each other between the vehicle-mounted equipment and the vehicle-mounted equipment, or may be the communication between the road side unit (RSU) and the vehicle-mounted equipment and/or network equipment (such as base station equipment). It can also be communication between network equipment (such as base station equipment) and vehicle-mounted equipment and/or RSU.
  • the network equipment (which can be LTE base station equipment or NR base station equipment or a base station in a subsequent evolution system. It can be understood that Yes, the embodiments of the present application do not limit the specific forms of the first terminal device and the second terminal device, which are only exemplary descriptions.
  • the radio access network device in FIG. 1 may be a base station, or It is a device in a network that provides wireless access.
  • a terminal in a V2X network, there are two ways for a terminal to obtain V2X SL resources.
  • One is the wireless access network equipment scheduling method. In this way, the V2X terminal is scheduled according to the scheduling information of the wireless access network equipment.
  • the control messages and data of V2X communication are sent on the time-frequency resources of NR.
  • This resource acquisition mode is called Mode 3 (Mode 3) in Long Term Evolution (LTE) V2X, and Mode 1( Mode 1).
  • LTE Long Term Evolution
  • the other is the way that the V2X terminal independently selects resources. In this way, the V2X terminal selects the time-frequency resources used for communication from the available time-frequency resources contained in the V2X communication resource pool, and sends control messages and data on the selected resources.
  • This resource acquisition mode is called Mode4 (Mode 4) in LTE V2X, and Mode 2 (Mode 2) in NR V2X.
  • the above-mentioned terminal self-selection mode (Mode2) is mainly applied to V2X communication without network coverage. Because there is no unified resource management of network equipment, V2X terminals can only select communication resources by themselves for V2X communication, which will cause the communication resources selected by different terminals to occur. collision.
  • One of the existing methods is that in the mode where the V2X terminal selects resources by itself, the V2X terminal can send instructions in advance to indicate the reserved time-frequency resources, and other V2X terminals can monitor the instructions to avoid selecting the same resource, thereby reducing data The probability of a transmission collision. However, when the reservation indication information is sent, the transmission resources occupied by different V2X terminals may still collide, which affects the transmission efficiency of indication information and service data, and affects the transmission efficiency of indication information and service data.
  • the terminal in the embodiment of this application may refer to the user equipment (UE), access terminal, terminal unit, terminal station, and mobile station in the 5G network or the public land mobile network (Public Land Mobile Network, PLMN) that will evolve in the future , Mobile stations, remote stations, remote terminals, mobile equipment, wireless communication equipment, terminal agents, etc.
  • UE user equipment
  • PLMN Public Land Mobile Network
  • the access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices or wearable devices, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, industrial control (industrial) Wireless terminal in control), wireless terminal in self-driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety (transportation safety) Terminal, wireless terminal in smart city, wireless terminal in smart home, etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the terminal can be a vehicle, a vehicle-mounted communication device or a vehicle-mounted terminal, or a chip in the vehicle-mounted communication device or a vehicle-mounted terminal installed on the vehicle to assist the vehicle driving; it can also be a vehicle-mounted module, vehicle-mounted module, One or more components or units in an on-board component, on-board chip, or on-board unit.
  • the vehicle-mounted terminal may be a device used to implement wireless communication functions, such as a terminal or a chip that can be used in the terminal.
  • the vehicle-mounted terminal can be mobile or fixed.
  • the network device in the embodiment of the application may be a device used to communicate with a terminal device.
  • the network device may be a global system for mobile communications (GSM) system or code division multiple access (CDMA)
  • GSM global system for mobile communications
  • CDMA code division multiple access
  • the base transceiver station (BTS) in the LTE system can also be the base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolved base station (evolved) in the LTE system.
  • NodeB, eNB or eNodeB) it can also be a wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, access point, vehicle-mounted device, wearable device, and future
  • CRAN cloud radio access network
  • the network equipment in the 5G network or the network equipment in the future evolved PLMN network, etc., are not limited in the embodiment of the present application.
  • the time-frequency resource for sending reservation information and the time-frequency resource for sending service data may collide.
  • Fig. 2 is a resource reservation method.
  • the first time window and the second time window are continuous, and the start time of the second time window is the end time of the first time window.
  • the time point for UE1 to determine the resource is n1, the first time window of UE1 from time n1 to time n1+t1, and the second time from time n1+t1 to time n1+t2 for UE1 window.
  • the first time window [n1, n1+t1] of UE1 is used to send the resource indication information of UE1.
  • the resource indication information of UE1 is used to indicate the time-frequency resource for UE1 to send data packets.
  • the time-frequency resource for UE1 to send data packets is located in UE1. Within the second time window [n1+t1, n1+t2]. The time point at which the UE2 determines the resource of the UE2 is n2, and the time point n2 is later than the time point n1 in the time domain.
  • the UE2 starts at time n2 to time n2+t1 as the first time window of UE2, and starts at time n2+t1 to time n2+t2 as the second time window of UE2.
  • the first time window [n2, n2+t1] of UE2 is used to send the resource indication information of UE2.
  • the resource indication information of UE2 is used to indicate the time-frequency resource for UE2 to send data packets.
  • the time-frequency resource for UE2 to send data packets is located in UE2. Within the second time window [n2+t1, n2+t2].
  • the time point when the UE determines the resource may be the time point when the physical layer receives the data packet transmitted by the upper layer (for example, the MAC layer, the RRC layer, etc.).
  • UE1 can detect resource indication information sent by other devices before time n1, and determine the time and frequency for sending UE1 resource indication information within the first time window [n1, n1+t1] at time n1 Resources.
  • UE1 can send the resource indication information of UE1 in the black solid square in the first time window (UE1 in the black solid square in Figure 2 represents the time-frequency resource for UE1 to send the resource indication information),
  • the resource indication information of the UE1 is used to indicate the time-frequency resource of the data packet sent by the UE1 in the second time window [n1+t1, n1+t2] of the UE1, that is, the time-frequency resource 1 in FIG. 2.
  • UE2 detects resource indication information sent by other devices other than UE2 before time n2, and at time n2 determines the time-frequency resource for sending UE2's resource indication information within the first time window [n2, n2+t1] of UE2 . Since the time when UE1 sends the resource indication information of UE1 is after time n2, UE2 has not received the resource indication information of UE1 sent by UE1 before time n2. Therefore, it is possible for UE2 to send UE1 to the time-frequency resource 1 of the data packet.
  • time-frequency resources are determined as the time-frequency resources for UE2 to send its resource indication (the black solid square in Figure 2 represents the time-frequency resources for UE2 to send resource indication information), which will cause UE2 to be
  • the time-frequency resource for sending the resource indication information of UE2 in the first time window [n2, n2+t1], and the time-frequency resource for sending data packets by UE1 in the second time window [n1+t1, n1+t2] of UE1 ( Time-frequency resource 1) collides, causing other terminal devices other than UE2 not to receive the resource indication information sent by UE2. Therefore, other devices may reserve the time-frequency resource (time-frequency resource 2) for UE2 to send data packets, thereby affecting Data transmission efficiency.
  • an embodiment of the present application provides a communication method, which can be applied to a terminal device
  • the terminal device may be the first terminal device or the second terminal device in this application.
  • the terminal device in the foregoing embodiment may be a terminal, or may be a chip applied to the terminal or other combination devices or components having the foregoing terminal functions.
  • the terminal device may include a processing unit and a transceiving unit.
  • the transceiver unit can be a receiver and a transmitter, which can include an antenna and a radio frequency circuit, etc., wherein the receiver and transmitter can be an integrated transceiver, and the processing module can be a processor, such as a central processing unit ( central processing unit, CPU).
  • a central processing unit central processing unit, CPU
  • the transceiver unit may be a radio frequency unit
  • the processing unit may be one or more processors.
  • the transceiver unit may be an input/output interface of the chip system
  • the processing module may be a processor of the chip system.
  • the terminal device 300 includes at least one processor 301, a memory 302, and a transceiver 303.
  • the processor 301 is the control center of the terminal device 300, and may be a processor or a collective name for multiple processing elements.
  • the processor 301 is a central processing unit (CPU), or a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention
  • CPU central processing unit
  • ASIC Application Specific Integrated Circuit
  • microprocessors digital signal processor, DSP
  • field programmable gate arrays Field Programmable Gate Array, FPGA
  • the processor 301 can execute various functions of the communication device by running or executing a software program stored in the memory 302 and calling data stored in the memory 302.
  • the processor 301 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 3.
  • the communication device may include multiple processors, for example, the processor 301 and the processor 304 shown in FIG. 3. Each of these processors can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU).
  • the processor here may refer to one or more communication devices, circuits, and/or processing cores for processing data (for example, computer program instructions).
  • the memory 302 can be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions
  • the dynamic storage device can also be electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), CD-ROM (Compact Disc Read-Only Memory, CD-ROM) or other optical disc storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this.
  • the memory 302 may exist independently and is connected to the processor 301.
  • the memory 302 may also be integrated with the processor 301.
  • the memory 302 is used to store a software program implementing the solution of the present invention, and the processor 301 controls the execution.
  • the transceiver 303 is used to communicate with other communication devices.
  • the transceiver 303 can also be used to communicate with communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (Wireless Local Area Networks, WLAN), and so on.
  • the transceiver 303 may include a receiving unit to implement a receiving function, and a sending unit to implement a sending function.
  • the structure shown in FIG. 3 does not constitute a limitation on the terminal device.
  • the terminal device 300 may include more or fewer components than shown in the figure, or a combination of some components, or a different component arrangement.
  • an embodiment of the present application provides a communication method that can avoid sending reservation information Collision occurs between the time-frequency resources of the time-frequency resources and the time-frequency resources for sending service data, which improves the reliability of reservation information and service information transmission, and improves network transmission efficiency.
  • Fig. 4 is a communication method provided by an embodiment of this application, and the communication method may include steps S401-S404.
  • the first terminal device detects second resource indication information from the second terminal device before the time point n.
  • the second resource indication information is used to instruct the second terminal device to send the second time-frequency resource of the second data packet.
  • the second terminal device may be a terminal device that can listen to the broadcast message sent by the first terminal device.
  • the second terminal device may be one terminal or multiple terminals, which is not limited in this embodiment of the application. .
  • the foregoing time point n is a time point at which the first terminal device determines the resource.
  • the time point n may be the time point when the Media Access Control (MAC) layer of the first terminal device receives the data packet transmitted by the upper layer (for example, the service layer), or other time points.
  • the embodiment does not limit this.
  • the first terminal device detecting the second resource indication information from the second terminal device before the time point n may include: the first terminal device listens to the broadcast message sent by the second terminal device before the time point n, and The broadcast message carries the second resource indication information, and the first terminal device can learn the second time-frequency resource reserved by the second terminal device for sending the second data packet according to the second resource indication information carried in the broadcast message.
  • the second resource indication is the resource indication information sent by the second terminal device that can be heard by the first terminal device before the time point n
  • the resource indication information sent by other terminal devices after the time point n is the first terminal device It cannot be heard, or the first terminal device does not consider the resource indication information sent by other terminal devices after the time point n.
  • the first terminal device may continuously listen to broadcast messages sent by multiple second terminal devices other than the first terminal device at different times, and obtain that the second data packet sent by the multiple second terminal devices before the time point n Second time-frequency resource. It can be understood that the second time-frequency resource for sending the second data packet by different second terminal devices may be different.
  • the first terminal device starting from the time point n when the first terminal device determines the resource, it corresponds to a set of time windows in the time domain, and the first terminal device considers this set of time when determining the transmission resource.
  • the set of time windows includes: a first time window, a second time window, and an interval time window between the first time window and the second time window.
  • the first time window is used for the first terminal device to send resource indication information
  • the second time window is used for the first terminal device to send data packets.
  • the lengths of the foregoing first time window, second time window, and interval time window may be equal or unequal, which is not limited in the embodiment of the present application.
  • the case where the lengths of the first time window, the second time window and the interval time window are not equal means that the lengths of the first time window, the second time window and the interval time window are not completely the same.
  • the length of the first time window, the second time window, and the interval time window are different from each other, or the length of the first time window and the second time window are the same, and the length of the interval time window is different, or the second time window
  • the length of the interval time window is the same as that of the first time window, or the length of the first time window and the interval time window are the same, but the length of the second time window is different.
  • the lengths of the first time window, the second time window, and the interval time window can be obtained in the following two ways.
  • the first terminal device may receive first indication information from the network device, and the first indication information is used to indicate the first time window, the second time window, and between the first time window and the second time window The length of the interval time window.
  • the first indication information may display the length of the first time window, the second time window, and the interval time window between the first time window and the second time window.
  • the first indication information may directly carry the length of the first time window, the second time window, and the interval time window; or, the network device may also configure multiple radio resource control (Radio Resource Control, RRC) signaling.
  • RRC Radio Resource Control
  • the index and the length of a set of time windows corresponding to each index (a set of time windows includes the first time window, the second time window, and the interval time window), and then the index is indicated by Downlink Control Information (DCI)
  • DCI Downlink Control Information
  • the first terminal device may determine the length of the first time window, the second time window, and the interval time window according to the index number indicated by the DCI and the corresponding relationship of the RRC signaling configuration.
  • the first indication information may also implicitly indicate the length of the first time window, the second time window, and the interval time window.
  • the corresponding relationship between the bandwidth and a set of time window lengths is pre-configured in the first terminal device, the above-mentioned first indication information may indicate the bandwidth resource, and the first terminal device may determine the first terminal device according to the corresponding relationship between the bandwidth and the pre-configuration.
  • the length of the time window, the second time window, and the interval time window does not limit the specific form of the first indication information, and is only an exemplary description here.
  • the network device may determine the first time window and the second time window according to the requirements of the transmission delay of the data packet to be transmitted, the statistical value of the data packet size, the network bandwidth, the degree of network congestion, etc. , And the length of the interval time window between the first time window and the second time window, and then send the length of the first time window, the second time window and the interval time window to the first terminal device.
  • the lengths of the first time window, the second time window, and the interval time window between the first time window and the second time window are predefined.
  • the start and end time of the first time window, the second time window, and the interval time window may also be predefined.
  • the first terminal device may also obtain the length of the first time window, the second time window, and the interval time window according to the start and end times of the first time window, the second time window, and the interval time window.
  • the embodiment of the present application does not limit the specific implementation manner in which the first terminal device obtains the first time window, the second time window, and the length of the interval time window between the first time window and the second time window.
  • the foregoing is only Exemplary description.
  • the time point at which the first terminal device determines the resource is n.
  • the start time point of the first time window in the time domain is n
  • the end time point is n+t1, which can be recorded as the first time window [n, n+ t1]
  • the start time point of the second time window in the time domain is n+t2
  • the end time point is n+t3, which can be recorded as the second time window [n+t2, n+t3]
  • the first time window There is an interval time window between and the second time window.
  • the start time point of the interval time window in the time domain is n+t1, and the end time point is n+t2, which can be recorded as the interval time window [n+t1, n+ t2].
  • t2 is equal to twice t1 and t3 is equal to three times t1
  • the lengths of the first time window, the second time window, and the interval time window are equal.
  • FIG. 5 only exemplarily shows that the lengths of the first time window, the second time window, and the interval time window are equal.
  • the first terminal device may send resource indication information within a first time window [n, n+t1].
  • the resource indication information is used to indicate the time-frequency resource for the first terminal device to send a data packet.
  • the time-frequency resource for a terminal device to send data packets is located in the second time window [n+t2, n+t3]; that is, the resource indication information is used to reserve the time for sending the data packet of the first terminal device in the second time window Frequency resources.
  • the first terminal device may send the data packet within the second time window [n+t2, n+t3], that is, the first terminal device may send the data packet on the time-frequency resource reserved by the resource indication information.
  • the time point when the UE1 determines the resource is n1, and the time point when the UE2 determines the resource is n2 as an example.
  • UE1 sends the resource indication information of UE1 within the first time window [n1, n1+t1] of UE1 (the black solid box marked UE1 in Figure 6).
  • the resource indication information of UE1 is used to indicate that UE1 is in The time-frequency resource for sending data packets in the second time window [n1+t2, n1+t3] of the UE1.
  • UE2 detects resource indication information sent by other devices other than UE2 before time n2, and determines the time-frequency resource for sending the resource indication information of UE2 within the first time window [n2, n2+t1] of UE2 at time n2.
  • UE2 Since the resource indication information of UE1 occurred after time n2, UE2 did not receive the resource indication information sent by UE1 before time n2. As shown in Figure 6, although UE2 did not receive the resource indication information of UE1 sent by UE1 before time n2, because there is an interval time window between the first time window and the second time window, UE2 is in UE2.
  • the time-frequency resource is unlikely to collide with the time-frequency resource of UE1 sending the data packet of UE1, thus avoiding UE2
  • the time-frequency resource for sending resource indication information collides with the time-frequency resource for sending data packets by UE1.
  • the second time-frequency resource for sending the second data packet by the second terminal device may be located in the first time window [n, n+t1] of the first terminal device, or may be located in the interval time window of the first terminal device [n+t1, n+t2], may also be located in the second time window [n+t2, n+t3] of the first terminal device, and may also be located in the first time window and interval time window of the first terminal device And in other time periods outside the second time window, the embodiment of the present application does not limit this.
  • the first terminal device listens to the second resource indication information sent by multiple second terminal devices before the time point n. Among them, there may be several second terminal devices that send the second time-frequency resource of the second data packet.
  • first time window [n, n+t1] of the first terminal device there may also be several second terminal devices sending the second data packet in the second time-frequency resource may be located in the second time window of the first terminal device [ n+t2, n+t3].
  • the embodiment of the present application does not limit the specific time period in which the second time-frequency resource for the second terminal device to send the second data packet is located. This is only an example to illustrate the time when the second terminal device sends the second data packet.
  • the frequency resources may be in different time periods.
  • first time window [n, n+t1] means that the first time window starts from the time point n to the time point n+t1 in the time domain.
  • second time window [n+t2, n+t3] means that the second time window starts from the time point n+t2 to the time point n+t3 in the time domain.
  • the time point at which the first terminal device determines the resource is n as an example.
  • the first terminal device listened to the second resource indication information sent by the second terminal device.
  • the second terminal device includes UE1, UE2, and UE3 as an example.
  • a small square in Figure 7 represents a resource block (Resource Block, RB). If the duration of each resource block is ⁇ t, the first terminal device listens to the second sent by UE1 at n-5* ⁇ t. Resource indication information.
  • the second resource indication information of UE1 is used to indicate that the time-frequency resource for sending UE1's data packet is time-frequency resource 1. As shown in FIG.
  • the time-frequency resource 1 is located in the first terminal device of the first terminal device. Within the time window. The first terminal device listens to the second resource indication information sent by UE2 at time n-2* ⁇ t, and the second resource indication information of UE2 is used to indicate that the time-frequency resource for UE2 to send the data packet of UE2 is time-frequency resource 2. As shown in FIG. 7, the time-frequency resource 2 is located in the second time window of the first terminal device. The first terminal device listens to the second resource indication information sent by UE3 at time n- ⁇ t, and the second resource indication information of UE3 is used to indicate that the time-frequency resource for UE3 to send the data packet of UE3 is time-frequency resource 3, such as As shown in FIG. 7, the time-frequency resource 3 is located in the second time window of the first terminal device.
  • each terminal device determines the resource, it can be based on the first time window [n, n+t1] and the interval time window [n+t1, n+t2] that are continuous in time.
  • the second time window [n+t2, n+t3] to determine the resource for sending the resource indication information and the resource for sending the data packet.
  • the first time window [n, n+t1] is used for the terminal device to send resource indication information
  • the second time window [n+t2, n+t3] is used for the terminal device to send the data packet of the terminal device.
  • the time-frequency resource for a terminal device to send data packets in the second time window of the terminal device may be located in the first time window of other terminal devices, or within the interval time window , Or within the second time window, or other time periods.
  • time points n at which different terminal devices determine resources in the embodiment of the present application may be different, but the length of the first time window of different terminal devices is the same, and the length of the second time window of different terminal devices is the same, and different terminal devices The length of the interval time window is the same.
  • the first terminal device determines the first time-frequency resource from the second time window [n+t2, n+t3] at the time point n according to the second resource indication information.
  • the first time-frequency resource is used to send the first data packet of the first terminal device.
  • determining the first time-frequency resource from the second time window [n+t2, n+t3] according to the second resource indication information at the time point n by the first terminal device may include: The first time-frequency resource is determined from the time-frequency resources other than the second time-frequency resource in the second time window [n+t2, n+t3], where the second time-frequency resource is located in the second time window [n+t2, n+t3].
  • the first time-frequency resource determined in the time-frequency resource is a time-frequency resource that is not reserved by the second terminal device for sending the second data packet in the second time window [n+t2, n+t3]. That is, the first time-frequency resource determined in the embodiment of the present application will not overlap with the second time-frequency resource. Therefore, the first time-frequency resource for the first terminal device to send the first data packet and the first time-frequency resource for the second terminal device to send the second data packet Two time-frequency resources will not collide.
  • the first terminal device can determine the time excluding the second time-frequency resource from the second time window [n+t2, n+t3] according to the second resource indication information of UE1, UE2, and UE3.
  • the first time-frequency resource is determined from the frequency resource.
  • the second time-frequency resource of UE1 is time-frequency resource 1
  • the second time-frequency resource of UE2 is time-frequency resource 2
  • the second time-frequency resource of UE3 is time-frequency resource 3. Since the second time window [n+t2, n
  • the second time-frequency resource in +t3] includes time-frequency resource 2 and time-frequency resource 3. Therefore, the first terminal device can divide time-frequency resource 2 and time-frequency resource 2 from the second time window [n+t2, n+t3].
  • the first time-frequency resource is determined from the time-frequency resources other than the frequency resource 3. That is, the first time-frequency resource is a time-frequency resource that is not reserved by other devices for sending the second data packet in the second time window [n+t2, n+t3].
  • the first terminal device since the first time-frequency resource is the time-frequency resource that is not reserved by the second terminal device for sending the second data packet in the second time window, the first terminal device sends the first data in the first time-frequency resource During the packet, it will not collide with the second time-frequency resource of the second data packet sent by the second terminal device, which improves the reliability of service transmission.
  • the first terminal device determines the first time-frequency resource from the second time window [n+t2, n+t3] according to the second resource indication information at time point n, which may include: The terminal device determines the time-frequency resource used for sending the first data packet from the second time-frequency resource, where the second time-frequency resource is located in the second time window [n+t2, n+t3].
  • the first terminal device can preempt the time-frequency resource reserved by the second terminal device for sending the second data packet. That is, when the time-frequency resources in the second time window [n+t2, n+t3] are insufficient, high-priority data packets can preempt the reserved time-frequency resources for sending low-priority data packets.
  • the small squares filled with diagonal lines and the small black squares in Figure 8 both represent the second time-frequency resource used to send the second data packet
  • the black solid squares in Figure 8 represent The second time-frequency resource of the second data packet sent by UE2 to UE2 is recorded as time-frequency resource 1. If the time-frequency resources other than the second time-frequency resource in the second time window [n+t2, n+t3] in Fig. 8 are smaller than the first time-frequency resource, that is, the second time window [n+t2, n+t3]
  • the unreserved time-frequency resource is less than the time-frequency resource for sending the first data packet.
  • the first terminal device determines the priority of the first data packet.
  • the first terminal device can send the second data of UE2 from the reservation.
  • the first time-frequency resource used to send the first data packet is determined from the second time-frequency resource of the packet, that is, the first terminal device (UE3 in FIG. 8) can use the second time window [n+t2,
  • the first time-frequency resource used to send the first data packet is determined in the time-frequency resource 1 in n+t3].
  • the embodiment of the present application can preempt the reserved time-frequency resources for sending low-priority data packets through high-priority data packets, thereby ensuring Reliability of high priority data packet transmission.
  • the above method may further include: the first terminal device sends a notification message to the second terminal device, the notification The message is used to indicate that some or all of the time-frequency resources in the second time-frequency resources in the second time window are used by the first terminal device to send the first data packet. That is, after the first terminal device preempts the second time-frequency resource reserved by the second terminal device for sending the second data packet, it sends a notification message to other second terminal devices other than the first terminal device to inform other terminal devices of the first Part or all of the second time-frequency resources in the second time window are used by the first terminal device to send the first data packet.
  • the second terminal device that is seized of the time-frequency resource will not send the second data packet on the second time-frequency resource reserved by it.
  • the second terminal device whose time-frequency resource is preempted may re-reserve the time-frequency resource for sending the second data packet of the second terminal device.
  • the first terminal device sends the first resource indication information within the first time window [n, n+t1].
  • the first resource indication information is used to indicate the first time-frequency resource.
  • the first time-frequency resource is the time-frequency resource for the first terminal device to send the first data packet.
  • step S403 it may further include: the first terminal device determines a third time-frequency resource from time-frequency resources other than the second time-frequency resource within the first time window [n, n+t1], and the first terminal device The three-time-frequency resource is used to send the first resource indication information, where the second time-frequency resource is located in the first time window [n, n+t1].
  • the first terminal device uses the time-frequency resource other than the second time-frequency resource within the first time window [n, n+t1]
  • the third time-frequency resource determined in the resource is a time-frequency resource that is not reserved by the second terminal device for sending the second data packet in the first time window [n, n+t1].
  • the first time window and the second time window are separated by the interval time window, it is impossible for the first terminal device to send the third time-frequency resource of the first resource indication information when sending data packets with other terminal devices. Frequency resources collide, which improves the reliability of resource indication information.
  • the time-frequency resource used by the first terminal device to send the first resource indication information may be one resource block, or multiple resource blocks, or a sub-channel composed of multiple resource blocks. This is not limited.
  • the time-frequency resource for which the first terminal device sends the first resource indication information is a subchannel, the number of resource blocks included in the subchannel can be configured.
  • the foregoing first terminal device determining the third time-frequency resource from time-frequency resources other than the second time-frequency resource in the first time window [n, n+t1] may include: A resource block is randomly selected from time-frequency resources other than the second time-frequency resource in a time window [n, n+t1], and determined as the third time-frequency resource; or, the first terminal device selects the resource block from the first time window Multiple resource blocks are randomly selected from time-frequency resources other than the second time-frequency resource in [n, n+t1], and determined as the third time-frequency resource.
  • the first terminal device may, according to the second resource indication information of UE1, UE2, and UE3, from time-frequency resources other than the second time-frequency resource in the first time window [n, n+t1] Determine the third time-frequency resource.
  • the second time-frequency resource of UE1 is time-frequency resource 1
  • the second time-frequency resource of UE2 is time-frequency resource 2
  • the second time-frequency resource of UE3 is time-frequency resource 3.
  • the second time-frequency resource in only includes time-frequency resource 1.
  • the first terminal device may randomly select a resource block from time-frequency resources other than time-frequency resource 1 in the first time window [n, n+t1] , Determine it as the third time-frequency resource. That is, the third time-frequency resource is a time-frequency resource that is not reserved by the second terminal device for sending the second data packet in the first time window.
  • the third time-frequency resource for sending the first resource indication information by the first terminal device is the time within the first time window [n, n+t1] that is not reserved by the second terminal device for sending the second data packet Therefore, it is possible to avoid collisions between the third time-frequency resource for sending the first resource indication information by the first terminal device and the time-frequency resource for sending the second data packet from the second terminal device, which improves the resource indication information and service transmission efficiency. reliability.
  • the first terminal device sending the first resource indication information in the first time window [n, n+t1] in the above step S403 may include: the third time frequency of the first terminal device in the first time window The resource sends the first resource indication information.
  • the first terminal device determines the third time-frequency resource from time-frequency resources other than the second time-frequency resource in the first time window [n, n+t1], it is possible that the first terminal device determines The third time-frequency resource of is the time-frequency resource reserved by the second terminal device for sending the second resource indication information, which may cause the first terminal device to send the time-frequency resource indicated by the first resource and the second terminal device to send the second resource
  • the time-frequency resources of the indication information collide.
  • the third time-frequency resource may include multiple time-frequency resource units, and the first terminal device may send the first Resource instructions.
  • determining the third time-frequency resource by the first terminal device may include the following steps a to c.
  • Step a The first terminal device obtains the first time-frequency resource pattern.
  • the first time-frequency resource pattern is used to indicate the relative positional relationship between the multiple time-frequency resource units in the time-frequency domain.
  • the time-frequency resource unit is a time-frequency resource unit that sends the first resource indication information, and the time-frequency resource unit is a time-frequency resource unit in a time-frequency resource other than the second time-frequency resource in the first time window.
  • the time-frequency resource unit may be one resource block, or may be multiple resource blocks, or may be a sub-channel composed of multiple resource blocks, which is not limited in the embodiment of the present application.
  • only the time-frequency resource unit for sending the first resource indication information is a resource block for description.
  • the above-mentioned time-frequency resource unit is a resource block in the time-frequency resources other than the second time-frequency resource in the first time window.
  • the above-mentioned first time-frequency resource pattern is used to indicate the relative positional relationship between multiple time-frequency resource units in the time-frequency domain, because the time-frequency resource unit is the time in the first time window other than the second time-frequency resource.
  • a resource block in the frequency resource therefore, the first time-frequency pattern represents the relative positional relationship between multiple resource blocks in the time-frequency resource other than the second time-frequency resource in the first time window.
  • the relative position relationship in the time-frequency domain in the embodiments of the present application refers to the effective offset position of the two resource blocks in the time-frequency domain, where, in the time domain or in the frequency domain, there is no second terminal between the two resource blocks.
  • the time-frequency resource reserved by the device for sending the second data packet is included in the effective offset, and the second time-frequency resource between two resource blocks is not included in the effective offset. That is, the above-mentioned effective offset does not consider the second time-frequency resource between resource blocks, so the second time-frequency resource is an invalid offset position and is not included in the offset.
  • the time domain difference between two time-frequency resource units is 1 resource block, it means that the effective offset position of the time domain of the two time-frequency resource units is 1.
  • the small square filled with diagonal lines in FIG. 9 represents the second time-frequency resource. Since in the time domain in Figure 9, the time-frequency resource between the resource block RB1 and the resource block RB2 is the second time-frequency resource, that is, the invalid offset position, which is not included in the offset, so the effective offset is not considered
  • the second time-frequency resource between RB1 and RB2 so the effective offset position of the time domain of RB1 and RB2 is 1 resource block.
  • the effective offset of RB3 and RB4 in the time domain is 1 resource block
  • the effective offset of RB3 and RB4 in the frequency domain is 1 resource block.
  • the effective offset positions of RB5 and RB6 in the time domain in FIG. 9 are one resource block
  • the effective offset positions of RB5 and RB6 in the frequency domain are two resource blocks.
  • the embodiment of the present application does not limit the minimum granularity of the time-frequency domain offset of multiple time-frequency resource units.
  • only one resource block with the minimum granularity is taken as an example for exemplification.
  • acquiring the first time-frequency resource pattern by the first terminal device may include: the first terminal device receives a time-frequency resource pattern set sent by a network device (for example, a base station device), and the time-frequency resource pattern set includes: One or more time-frequency resource patterns, and the first terminal device randomly selects a time-frequency resource pattern from the time-frequency resource pattern set as the first time-frequency resource pattern.
  • the time-frequency resource patterns randomly selected by different terminal devices may be different, which can reduce the time-frequency resource for the first terminal device to send the first resource indication information and the time-frequency resource for the second terminal device to send the second resource indication. The probability of a collision.
  • acquiring the first time-frequency resource pattern by the first terminal device may include: the first terminal device receives the first time-frequency resource pattern sent by a wireless access network device (for example, a base station device).
  • the radio access network equipment can configure different time-frequency resource patterns for each terminal device. Since different terminal devices have different time-frequency resource patterns, the probability of collisions between resource indication information sent by different devices Will be greatly reduced.
  • acquiring the first time-frequency resource pattern by the first terminal device may include: the first terminal device generates the first time-frequency resource pattern according to its own characteristics.
  • the first terminal may obtain the first time-frequency resource pattern in any of the above-mentioned manners, which is not limited in the embodiment of the present application.
  • Step b The first terminal device determines, according to the second resource indication information, that time-frequency resources other than the second time-frequency resource in the first time window [n, n+t1] are candidate time-frequency resources.
  • the time-frequency resources other than the second time-frequency resource in the first time window are the time-frequency resources that are not reserved by the second terminal device for sending the second data packet in the first time window.
  • the first terminal device may determine, according to the second resource indication information of UE1, UE2, and UE3, that the time-frequency resources other than the second time-frequency resource in the first time window [n, n+t1] are Candidate time-frequency resources.
  • the second time-frequency resource of UE1 is time-frequency resource 1
  • the second time-frequency resource of UE2 is time-frequency resource 2
  • the second time-frequency resource of UE3 is time-frequency resource 3. Since the second time-frequency resource included in the first time window
  • the frequency resource is time-frequency resource 1.
  • the first terminal device may determine that time-frequency resources other than time-frequency resource 1 in the first time window [n, n+t1] are candidate time-frequency resources, that is, the first time window [ Time-frequency resources in n, n+t1] that are not reserved by other devices for sending data packets are candidate time-frequency resources. That is, the blank squares in the first time window [n, n+t1] in FIG. 7 are all candidate time-frequency resources.
  • Step c The first terminal device determines a third time-frequency resource among the candidate time-frequency resources according to the first time-frequency resource pattern.
  • the third time-frequency resource includes multiple time-frequency resource units, and the multiple time-frequency resource units are time-frequency resources in the time-frequency resources other than the second time-frequency resource in the first time window, that is, the multiple time-frequency resources
  • the resource unit is a time-frequency resource unit that is not reserved by the second terminal device for sending the second data packet in the first time window.
  • the first terminal device determines multiple time-frequency resource units among the candidate time-frequency resources according to the first time-frequency resource pattern, which may include: the first terminal device randomly selects one time-frequency resource from the candidate time-frequency resources
  • the frequency resource unit is a first time-frequency resource unit; according to the first time-frequency resource pattern and the first time-frequency resource unit, the second time-frequency resource unit is determined from the candidate time-frequency resources.
  • the second time-frequency resource unit is a time-frequency resource among the candidate time-frequency resources, and the relative positional relationship in the time-frequency domain between the first time-frequency resource unit and the second time-frequency resource unit is the position relationship indicated by the first time-frequency resource pattern ,
  • the time domain of the second time-frequency resource unit is later on the time axis than the time domain of the first time-frequency resource unit, that is, the time domain of the second time-frequency resource unit is larger than the time domain of the first time-frequency resource unit.
  • the frequency domain of the foregoing second time-frequency resource unit may be higher than the frequency domain of the first time-frequency resource unit, or may be lower than the frequency domain of the first time-frequency resource unit, which is not limited in this embodiment of the application.
  • the relative position of the frequency domain in the first time-frequency resource pattern may be a positive number; when the frequency of the second time-frequency resource unit is When the domain is lower than the frequency domain of the first time-frequency resource unit, the relative position of the frequency domain in the first time-frequency resource pattern may be a negative number.
  • the relative position of the frequency domain in the first time-frequency resource pattern may be a negative number; the frequency of the second time-frequency resource unit When the domain is lower than the frequency domain of the first time-frequency resource unit, the relative position of the frequency domain in the first time-frequency resource pattern may be a positive number, which is not limited in this embodiment of the application.
  • the relative position of the frequency domain in the first time-frequency resource pattern is a positive number
  • the second time-frequency resource unit When the frequency domain of is lower than the frequency domain of the first time-frequency resource unit, the relative position of the frequency domain in the first time-frequency resource pattern may be a negative number for illustration.
  • the time-frequency resource unit as a resource block as an example. If the position relationship indicated by the first time-frequency resource pattern is a time domain difference of 1 resource block RB, and a frequency domain difference of +1 resource block RB. As shown in Figure 10, the small square filled with diagonal lines in Figure 10 represents the second time-frequency resource, that is, the time-frequency resource reserved by the second terminal device for sending the second data packet. The time-frequency resources in the time window other than the small squares filled with diagonal lines are candidate time-frequency resources. The first terminal device may randomly select a resource block from the candidate time-frequency resources as the first time-frequency resource unit. The time-frequency resource unit may be RB1 in FIG. 10.
  • the first terminal device determines, among the candidate time-frequency resources, a resource block that is 1 RB apart from RB1 in the time domain and +1 RB in the frequency domain, because the frequency domain in the first time-frequency resource pattern
  • the difference is a positive number of resource blocks, so the frequency domain of the second time-frequency resource unit is higher than the frequency domain of the first time-frequency resource unit, and the effective offset position of the frequency domain is 1 resource block, and the second time-frequency resource unit
  • the time domain of is greater than the time domain of the first time-frequency resource unit, and the effective offset position of the time domain is 1 resource block.
  • the second time-frequency resource unit is RB2.
  • multiple time-frequency resource units may also be three or more time-frequency resource units, which is not limited in the embodiment of the present application.
  • the multiple time-frequency resource units constitute two A time-frequency resource unit is taken as an example for description.
  • the first terminal device sends the first resource indication information on the third time-frequency resource in the first time window may include: the first terminal device sends the first resource indication to the multiple time-frequency resource units respectively information.
  • the first terminal device may send the first resource indication information respectively in the first time-frequency resource unit and the second time-frequency resource unit determined in step c. That is, the first terminal device may send multiple copies of the first resource indication information.
  • the first terminal device and the second terminal device have different first time-frequency resource patterns, that is, the relative positional relationship between the multiple time-frequency resources for which the first terminal device sends multiple copies of the first resource indication information, and The relative positional relationship between the multiple time-frequency resources for which the second terminal device sends multiple copies of the second resource indication information is different. Therefore, the first terminal device sends multiple copies of the first resource indication information for the multiple time-frequency resources and the second terminal The multiple time-frequency resources for sending multiple copies of the second resource indication information by the device will not completely overlap, which can reduce the time-frequency resource for the first terminal device to send the first resource indication information and the time-frequency for the second terminal device to send the second resource indication information. The probability of resource collision, thereby improving the reliability of resource indication information.
  • the first time-frequency resource unit and the second time-frequency resource unit are determined from the candidate time-frequency resources, and the candidate time-frequency resources are not reserved for sending data by the second terminal device in the first time window Therefore, the first time-frequency resource unit and the second time-frequency resource unit that the first terminal device sends multiple copies of the first resource indication information will not send the second data packet with the second terminal device. Collision occurs between time and frequency resources, which improves the reliability of resource indication information and service transmission.
  • S404 The first terminal device sends the first data packet in the first time-frequency resource.
  • the first time-frequency resource is the time-frequency resource indicated by the first resource indication information
  • the first terminal device transmits the first data packet on the first time-frequency resource reserved by the first terminal device.
  • the first terminal device learns the resource reservation in the first time window according to the second resource indication information, and is not reserved by the second terminal device for sending the second time window within the first time window.
  • the third time-frequency resource used to send the first resource indication information is determined. Therefore, the third time-frequency resource for sending the first resource indication information by the first terminal device and the second terminal device are avoided A collision occurs between the second time-frequency resources scheduled to send the second data packet.
  • the time when the first terminal device sends the first resource indication information does not collide with the time-frequency resource of the second data packet sent by other second terminal devices, which improves the reliability of the resource indication information and makes the transmission efficiency of the network higher.
  • An embodiment of the present application provides a communication method that obtains a first time window, a second time window, and the length of an interval time window between the first time window and the second time window through a first terminal device;
  • the second resource indication information from the second terminal device is detected before the time point n, and the second resource indication information is used to instruct the second terminal device to send the second time-frequency resource of the second data packet;
  • the first terminal device is at the time point n Determine the first time-frequency resource from the second time window [n+t2, n+t3] according to the second resource indication information;
  • the first terminal device sends the first resource indication in the first time window [n, n+t1] Information, the first resource indication information is used to indicate the first time-frequency resource;
  • the first terminal device sends the first data packet on the first time-frequency resource.
  • the first terminal device in this embodiment sends the first resource indication information in the first time window and sends the first data packet in the second time window, there is an interval time window between the first time window and the second time window , And the third time-frequency resource for sending the first resource indication information by the first terminal device is determined in the time-frequency resource other than the second time-frequency resource in the first time window. Therefore, the first terminal device sends the first The time-frequency resource of the resource indication information will not collide with the time-frequency resource of the second data packet sent by other second terminal devices, which improves the reliability of the resource indication information and makes the transmission efficiency of the network higher.
  • the first time-frequency resource is determined from time-frequency resources other than the second time-frequency resource in the second time window, thereby avoiding the time-frequency resource of the first terminal device sending the first data packet and the second terminal device. A collision occurs between the time-frequency resources for sending the second data packet, which improves the reliability of data transmission.
  • the communication device includes hardware structures and/or software modules corresponding to each function.
  • the communication device includes hardware structures and/or software modules corresponding to each function.
  • the embodiment of the present application may divide the communication device into functional modules according to the foregoing method examples.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 11 shows a possible structural schematic diagram of a terminal device, and the communication device may be the first terminal device in the foregoing embodiment.
  • the terminal device 1100 includes a processing unit 1101 and a transceiver unit 1102.
  • the processing unit 1101 is used to control and manage the actions of the terminal device 1100.
  • the processing unit 1101 may be used to perform step S402 in FIG. 4, and/or other processes used in the technology described herein.
  • the transceiver unit 1102 is used to send and receive information, or to communicate with other network elements.
  • the transceiver unit 1102 can be used to perform steps S401 and S403-S404 in FIG. 4, and/or other processes used in the technology described herein.
  • all relevant content of each step involved in the above method embodiment can be cited in the function description of the corresponding function module, and will not be repeated here.
  • FIG. 12 shows a possible structural diagram of a network device.
  • the network device 1200 includes a processing unit 1201 and a transceiver unit 1202.
  • the processing unit 1201 is used to control and manage the actions of the network device 1200.
  • the processing unit 1201 may be used to determine first indication information, which is used to indicate the value of the first time window, the second time window, and the interval time window between the first time window and the second time window. length.
  • the transceiver unit 1202 is used to send and receive information, or to communicate with other network elements.
  • the transceiving unit 1202 may be used to send the first indication information to the first terminal device.
  • all relevant content of each step involved in the above method embodiment can be cited in the function description of the corresponding function module, and will not be repeated here.
  • FIG. 13 shows a schematic diagram of a possible structure of a terminal device, and the terminal device may be the first terminal device in the foregoing embodiment.
  • the terminal device 1300 includes a processor 1301 and a transceiver 1302.
  • the processor 1301 is used to control and manage the actions of the terminal device 1300.
  • the processor 1301 may be used to execute S402 in FIG. 4, and/or used to Other processes of the technique described in this article.
  • the transceiver 1302 is used to send and receive information, or to communicate with other network elements.
  • the transceiver 1302 is used to perform steps S401 and S403-S404 in FIG. 4, and/or other processes used in the technology described herein.
  • the aforementioned terminal device 1300 may further include a memory 1303, and the memory 1303 is configured to store program codes and data corresponding to the terminal device 1300 executing any of the communication methods provided above.
  • the memory 1303 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), etc.
  • the terminal device 1300 may be the terminal device 300 shown in FIG. 3, and the description of all related content of the components involved in FIG. 3 can be quoted from the functional description of the corresponding components in FIG. 13, which will not be repeated here.
  • FIG. 14 shows a possible structure diagram of a network device.
  • the network device 1400 includes a processor 1401 and a transceiver 1402, and the processor 1401 is configured to control and manage the actions of the network device 1400.
  • the processor 1401 may be used to determine first indication information, which is used to indicate the first time window, the second time window, and the interval time window between the first time window and the second time window. Length, and/or other processes used in the techniques described herein.
  • the transceiver 1402 is used to send and receive information, or to communicate with other network elements.
  • the transceiver 1402 may be used to send the first indication information to the first terminal device, and/or used in other processes of the technology described herein.
  • the aforementioned network device 1400 may further include a memory 1403, and the memory 1403 is configured to store the program code and data corresponding to any of the communication methods provided by the network device 1400.
  • the memory 1403 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), etc.
  • the steps of the method or algorithm described in conjunction with the disclosure of this application can be implemented in a hardware manner, or implemented in a manner in which a processor executes software instructions.
  • Software instructions can be composed of corresponding software modules, which can be stored in random access memory (Random Access Memory, RAM), flash memory, erasable programmable read-only memory (Erasable Programmable ROM, EPROM), and electrically erasable Programming read-only memory (Electrically EPROM, EEPROM), register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and can write information to the storage medium.
  • the storage medium may also be an integral part of the processor.
  • the processor and the storage medium may be located in the ASIC.
  • the ASIC may be located in the core network interface device.
  • the processor and the storage medium may also exist as discrete components in the core network interface device.
  • Computer readable media include computer storage media and communication media, where communication media includes any media that facilitates the transfer of computer programs from one place to another.
  • the storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et appareil de communication, se rapportant au domaine technique des communications, et utilisés pour résoudre le problème de la survenue possible d'une collision entre une ressource temps-fréquence sur laquelle un terminal V2X émet des informations d'indication et une ressource temps-fréquence sur laquelle le terminal V2X émet des données de service, ceux-ci pouvant être appliqués à un Internet des véhicules, tel que V2X, LTE-V et V2V. Un premier appareil terminal détecte des secondes informations d'indication de ressources provenant d'un second appareil terminal avant un instant n, les secondes informations d'indication de ressources étant utilisées pour indiquer une seconde ressource temps-fréquence sur laquelle le second appareil terminal émet un second paquet de données; le premier appareil terminal détermine une première ressource temps-fréquence issue d'une seconde fenêtre temporelle [n+t2, n+t3] selon les secondes informations d'indication de ressources et à l'instant n, la première ressource temps-fréquence étant utilisée pour émettre un premier paquet de données; le premier appareil terminal émet des premières informations d'indication de ressources au cours d'une première fenêtre temporelle [n, n+t1], les premières informations d'indication de ressources étant utilisées pour indiquer la première ressource temps-fréquence, et t1 ≠ t2 et t2 > t1; et le premier appareil terminal émet le premier paquet de données sur la première ressource temps-fréquence.
PCT/CN2020/095451 2019-06-27 2020-06-10 Procédé et appareil de communication WO2020259293A1 (fr)

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WO2022141465A1 (fr) * 2020-12-31 2022-07-07 华为技术有限公司 Procédé et dispositif de sélection de ressource

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